CN106206769A

CN106206769A - Solar module and preparation method thereof

Info

Publication number: CN106206769A
Application number: CN201510219565.3A
Authority: CN
Inventors: 赵志强; 姜占锋; 何龙
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2014-10-31
Filing date: 2015-04-30
Publication date: 2016-12-07
Also published as: CN106206814A; CN106206809A; CN106206818A; CN106206811A; CN106206761A; CN106206816B; CN106206762A; CN106206817A; CN106206766A; CN106206767B; CN106206817B; CN106206808B; CN106206764A; CN106206815B; CN106206762B; CN106206816A; CN106206808A; CN106206810B; CN106206767A; CN106206764B

Abstract

This application discloses a kind of solar module and preparation method thereof, solar module includes the upper cover plate being sequentially stacked, front adhesive film, cell piece, back side adhesive film and backboard, cell piece has secondary grid line, it is provided with transparent film layer between front adhesive film and cell piece, the surface that transparent film layer is relative with cell piece is provided with conductor wire, in conductor wire is embedded into transparent film layer and expose in transparent film layer, conductor wire is made up of tinsel and is connected with secondary grid line, the fusing point of transparent film layer is higher than front adhesive film and the fusing point of back side adhesive film, tinsel includes tinsel body and the connecting material layer being coated on tinsel body, conductor wire is connected with secondary grid line by the connecting material layer being applied on tinsel body.Solar module according to the embodiment of the present application, it is possible to improve the switching performance between conductor wire and secondary grid line so that this solar module has of a relatively high electricity conversion.

Description

Solar module and preparation method thereof

Technical field

The application relates to area of solar cell, more particularly to solar module and preparation method thereof.

Background technology

Solar module is one of vitals of device of solar generating.Sunlight from the front illuminated of cell piece to electricity On the sheet of pond, the front of cell piece is provided with secondary grid line and main gate line, is then drawn by the welding that covering is welded in main gate line Electric current, welding, main gate line and secondary grid line cover the part in the front of cell piece, thus can block a part of sunlight, shine Solar energy on welding, main gate line and secondary grid line cannot be transformed into electric energy, accordingly, it would be desirable to welding, main grid and secondary grid are more Thin the best.But, the effect of welding, main gate line and secondary grid line is to conduct electric current, from the point of view of resistivity, welding, Main gate line and secondary grid line more detailed rules and regulations conduction cross-sectional area are the least, and ohmic loss is the biggest.Therefore welding, main gate line and secondary grid line set Meter needs to obtain balance, cost to be considered between shading and conduction.

Summary of the invention

The application is to make following facts and the discovery of problem and understanding based on applicant:

In correlation technique, the slurry of the main gate line and secondary grid line that make solar battery sheet is mainly composed of expensive silver, The preparation thus causing main gate line and secondary grid line is complicated, and cost is high, and is connected as cell piece during assembly needing one The main gate line in cell piece front is welded with the backplate of adjacent cell sheet by welding, and therefore the welding of main gate line is complicated, electricity The production cost of pond sheet is high.

In correlation technique, the front of cell piece is typically provided with two main gate line, and two main gate line are by the positive topcoating at cell piece Covering silver slurry to be formed, and the width of main gate line is big (such as, width reaches more than 2mm), thus consumption silver amount is big, cell piece Production cost is high.

In correlation technique, it is proposed that there is the solar battery sheet of 3 main gate line, but yet suffer from consuming silver amount and cost height, And, 3 main gate line increase shading-area, reduce conversion efficiency.

Additionally, the raising of main gate line quantity is also limited by welding, main gate line quantity is the biggest, and single main grid is the thinnest, welding More narrow, main gate line is welded the most difficult with welding, and the narrowest being more difficult to of welding manufactures, and welding cost is the highest.

Therefore, from reducing cost, the angle reducing shading-area is set out, and will originally be printed on cell piece in correlation technique Silver main gate line replaces with tinsel, such as copper wire, is welded thus derived current with secondary grid line by copper wire.Due to not in use by silver Main gate line, its cost can be greatly reduced, simultaneously because the diameter of copper wire is less, it is possible to reduction shading-area, therefore, can Further quantity is risen to 10.This cell piece is properly termed as dereliction grid cell sheet, and wherein, tinsel substituted for passing Silver-colored main grid in system solar battery sheet and welding.

Correlation technique has employing will be adhesive with hyaline membrane wiry to electrically connect with cell piece with cell piece lamination formation tinsel Technical scheme, i.e. first by many parallel tinsels by bonding by the way of be fixed on transparent film layer, then pasted Close on cell piece, make tinsel contact with the secondary grid line on cell piece finally by laminating technology.But, because tinsel It is to be bonded and fixed on hyaline membrane by tack coat, and the fusing point of tack coat is the most relatively low, can melt at lamination process tack coat Or soften, therefore tinsel still can occur a certain degree of drift.

But, use tack coat to be fixed on hyaline membrane by tinsel, in lamination process, tack coat can melt and is easily caused metal There is drift in silk, and the photoelectric transformation efficiency ultimately resulting in solar module reduces.

Therefore, in area of solar cell, the structure of solaode is the most uncomplicated, but each structure is more crucial, main Due to the factor of each side, the preparation of grid considers that such as shading surface, conductivity, equipment, technique, cost etc. cause it to be Difficult point in solar battery technology and focus.Those skilled in the art, through the effort of several generations many times, just make on the market Solar battery sheet was become three main grid solaodes by two main grid solaodes at about 2007, and a small amount of producer is 2014 Proposing the solaode of four main grids about Nian, the technology of many main grids is also the concept the most just proposed, but realizes more Difficulty, does not has more ripe product yet.

The application is intended to solve one of above-mentioned technical problem the most to a certain extent.

Present applicant proposes dereliction grid solar cell, this dereliction grid solar cell without arranging main gate line on cell piece, Without welding, reduce cost, and can commercialization, preparation is simple easily to be realized, particularly low cost, and equipment is simple, Can produce in batches, electricity conversion is high.

According to the solar module of the application first aspect embodiment, including the upper cover plate being sequentially stacked, front adhesive film, Cell piece, back side adhesive film and backboard, described cell piece has secondary grid line, between described front adhesive film and described cell piece Being provided with transparent film layer, the surface that described transparent film layer is relative with described cell piece is provided with conductor wire, and described conductor wire is embedded into In described transparent film layer and exposing in described transparent film layer, described conductor wire is made up of tinsel and is connected with described secondary grid line, The fusing point of described transparent film layer is higher than described front adhesive film and the fusing point of described back side adhesive film, and described tinsel includes metal Silk body and the connecting material layer being coated on tinsel body, described conductor wire is by connecting material layer and described secondary grid line phase Even.

According to the solar module of the embodiment of the present application, by arranging transparent film layer between cell piece and front adhesive film, And make conductor wire be embedded in advance in transparent film layer in preparation process, due to front during intensification so can be avoided to be laminated The problem that adhesive film and back side adhesive film melt and cause tinsel drift occur, it is ensured that the connection between conductor wire and secondary grid line Stability；It addition, by arranging the connecting material layer being connected with secondary grid line on tinsel body, conduction so can be improved Switching performance between line and secondary grid line so that this solar module has of a relatively high electricity conversion.

The preparation method of the solar module according to the application second aspect embodiment, including: by be made up of tinsel Conductor wire is fused in transparent film layer and described tinsel exposes in described transparent film layer, described tinsel include tinsel this Body and the connecting material layer being applied on tinsel body；By upper cover plate, front adhesive film, described transparent film layer, cell piece, Back side adhesive film and backboard are sequentially stacked, and are then laminated, to obtain solar module, wherein said conductor wire with The secondary grid line of cell piece is connected by described connecting material layer, and the fusing point of described transparent film layer is higher than described front adhesive film and institute State the fusing point of back side adhesive film.

Accompanying drawing explanation

Fig. 1 is the floor map of the solaode chip arrays according to one embodiment of the application.

Fig. 2 is the horizontal schematic cross-section of the solaode chip arrays according to one embodiment of the application.

Fig. 3 is longitudinal schematic cross-section of the solaode chip arrays according to one embodiment of the application.

Fig. 4 is the schematic diagram wiry for forming conductor wire according to the embodiment of the present application.

Fig. 5 is the floor map of the solaode chip arrays according to another embodiment of the application.

Fig. 6 is the floor map of the solaode chip arrays according to the another embodiment of the application.

Fig. 7 is the schematic diagram of the reciprocation extension wiry according to the embodiment of the present application.

Fig. 8 is the schematic diagram of two cell pieces of the solaode chip arrays according to the embodiment of the present application.

Fig. 9 is that two cell pieces shown in Fig. 8 are formed by connecting by tinsel the schematic diagram of solaode chip arrays.

Figure 10 is the schematic diagram of the solar module according to the embodiment of the present application.

Figure 11 is the schematic partial cross-sectional view of solar module shown in Figure 10.

Figure 12 is the schematic diagram of the solaode chip arrays according to the application another embodiment.

Reference:

Cell piece assembly 100；

Upper cover plate 10；

Front adhesive film 20；

Cell piece array 30；Cell piece 31；First cell piece 31A；Second cell piece 31B；Cell piece matrix 311；Secondary grid Line 312；Front pair grid line 312A；Back side pair grid line 312B；Edge pair grid line 3121；Middle secondary grid line 3122；Back of the body electricity Field 313；Back electrode 314；

Conductor wire 32；Front side conductive line 32A；Back side conductor wire 32B；Tinsel body 321；Connecting material layer 322；Short Grid line 33；

Back side adhesive film 40；

Lower cover 50；

Transparent film layer 60.

Detailed description of the invention

Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.

In this application, in order to more understand and be easy to describe, below part term is explained.

Term " cell piece 31 " includes cell piece matrix 311, the secondary grid line 312 being located on cell piece matrix 311 front, sets Back of the body electric field 313 at the back side of cell piece matrix 311 and the back electrode 314 being located on back of the body electric field 313, thus, secondary grid line The 312 secondary grid lines 312 being referred to as cell piece 31, back of the body electric field 313 is referred to as the back of the body electric field 313 of cell piece 31, Back electrode 314 is referred to as the back electrode 314 of cell piece 31.

" cell piece matrix 311 " such as can be by silicon chip after the operations such as making herbs into wool, diffusion, etching edge, deposited silicon nitride layer The intermediate products obtained, it should be understood that in the application, cell piece matrix 311 is not limited to be made up of silicon chip, Can also be other any suitable solaode sheet matrixes 311.

In other words, cell piece 31 includes silicon chip, some of silicon chip surface processes layers, the secondary grid line of sensitive surface and shady face Back of the body electric field 313 and back electrode 314, or other class solaodes not having front electrode of equivalent.

Term " battery unit " includes cell piece 31 and the conductor wire 32 being made up of tinsel S.

Term " solaode chip arrays 30 " includes that multiple cell piece 31 is connected and by tinsel with by adjacent cell sheet 31 The conductor wire 32 that S is constituted, in other words, solaode chip arrays 30 is by multiple cell pieces 31 being connected by conductor wire 32 Arrangement forms.

In solaode chip arrays 30, metal S constitutes the conductor wire 32 of battery unit, and tinsel S extends in adjacent electricity Should broadly understood between the surface of pond sheet 31, tinsel S can extend between the front of adjacent cell sheet 31, it is possible to To extend between front and the back side of another cell piece 31 of a cell piece 31 in adjacent cell sheet 31.At metal When silk S extends between front and the back side of another cell piece 31 of a cell piece 31 in adjacent cell sheet 31, lead Electric wire 32 can include extending on the front of a cell piece 31 and be electrically connected with the secondary grid line 312 of one cell piece 31 The front side conductive line 32A connect, and extend on the back side of another cell piece 31 and with another cell piece 31 described Back side conductor wire 32B, the tinsel S part between adjacent cell sheet 31 of back electrode 314 electrical connection is properly termed as even Connect conductor wire.

In this application, cell piece matrix 311, cell piece 31, battery unit, cell piece array 30 and solar battery group Part is intended merely to facilitate description, and it is not intended that restriction to the application.

The all scopes disclosed in the application all comprise end points and can independently combine.Scope disclosed herein End points and any value are not limited to this accurate scope or value, these scopes or value should be understood to comprise close to these scopes or The value of value.

In this application, except as otherwise noted, directional terminology such as " upper and lower " typically refers to shown in the drawings upper and lower；" just Face " refer to solar module one side towards light in application process, namely sensitive surface；" back side " refers to solar energy Battery component in application process back to the one side of light.

Specifically describe the solar module 100 according to the embodiment of the present application below in conjunction with the accompanying drawings.

As shown in Figures 1 to 12, upper cover plate 10, front glue are included according to the solar module 100 of the embodiment of the present application Film layer 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50.

Specifically, cell piece 31 has secondary grid line 312, is provided with transparent film layer between front adhesive film 20 and cell piece 31 60, the surface that this transparent film layer 60 is relative with cell piece 31 is provided with conductor wire 32, and conductor wire 32 is embedded into this hyaline membrane In layer 60 and exposing in transparent film layer 60, conductor wire 32 is made up of tinsel S and is connected with secondary grid line 312, hyaline membrane The fusing point of layer 60 is higher than front adhesive film 20 and the fusing point of back side adhesive film 40, and wherein tinsel S includes tinsel body 321 and the connecting material layer that is coated on tinsel body 321, conductor wire 32 is by being applied on tinsel body 321 Connecting material layer 322 is connected with secondary grid line 312.

In other words, according to the solar module 100 of the embodiment of the present application include being sequentially stacked along the vertical direction upper cover plate 10, Front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50.Wherein, cell piece 31 wraps Include cell piece matrix 311 and the secondary grid line 312 being located on cell piece matrix 311 front, in described front adhesive film 20 and institute State and be provided with transparent film layer 60 between the upper surface (sensitive surface of cell piece 31) of cell piece 31, the following table of this transparent film layer 60 Face is provided with the conductor wire 32 being embedded in transparent film layer 60 and exposing in transparent film layer 60, and conductor wire 32 is by tinsel S Constituting and be connected with secondary grid line 312, wherein tinsel S includes tinsel body 321 and is coated on tinsel body 321 On connecting material layer, conductor wire 32 is by the connecting material layer that is applied on tinsel body 321 322 and secondary grid line 312 It is connected.

When solar module 100 is laminated, owing to the fusing point of transparent film layer 60 is higher than front adhesive film 20 and the back of the body The fusing point of face adhesive film 40, in temperature-rise period, in the case of front adhesive film 20 and back side adhesive film 40 occur to melt, Transparent film layer 60 will not melt, and so may insure that the tinsel S being embedded in transparent film layer 60 will not drift about, The solar module 100 finally prepared is made to have of a relatively high electricity conversion.

As shown in Figure 4, it is coated with connecting material layer 322 outside tinsel body 321 and forms tinsel S, such as conductive adhesive layer Or weld layer, tinsel body 321 is electrically connected with secondary grid line and/or back electrode by the connecting material layer 322 of cladding, increases Tinsel and secondary grid line and/or the connection reliability of back electrode, it is to avoid tinsel drift in connection procedure and affect opto-electronic conversion Efficiency.

Thus, according to the solar module of the embodiment of the present application, by cell piece 31 upper surface (cell piece 31 Sensitive surface) and front adhesive film 20 between transparent film layer 60 is set, and make conductor wire 32 be embedded in advance in preparation process In bright film layer 60, during so can avoiding intensification lamination, cause gold due to front adhesive film and the thawing of back side adhesive film Belong to the problem that drift occurs in silk, it is ensured that the connective stability between conductor wire and secondary grid line；It addition, by tinsel body The connecting material layer being connected with secondary grid line is set on 321 and forms tinsel S, be made up of conductor wire, such energy further tinsel Enough improve the switching performance between conductor wire and secondary grid line so that this solar module has of a relatively high photoelectric conversion Efficiency.

Wherein, front adhesive film 20 and back side adhesive film 40 can be adhesive film commonly used in the art, it is preferable that just Face adhesive film 20 and back side adhesive film 40 polyethylene octene elastomer (POE) and/or ethylene-vinyl acetate copolymer (EVA). In this application, polyethylene octene elastomer (POE) and ethylene-vinyl acetate copolymer (EVA) can use this area Conventional use of product or prepare according to method well known to those skilled in the art.

In embodiments herein, upper cover plate 10 and backboard 50 can carry out selecting and true according to this area conventional technique Fixed, it is preferable that upper cover plate 10 and backboard 50 can be each transparent sheet material, such as glass plate.

Other component parts of solar module 100 according to the application can be known in the art, the most superfluous at this State.

It is understood that in above-described embodiment of the application, conductor wire 32 is embedding is provided at front adhesive film and cell piece On transparent film layer 60 between the upper surface of 31, and between transparent film layer 60 and the upper surface of a cell piece 31, Conductor wire 32 in this embodiment can be understood as the front side conductive line 32A of solar module 100, i.e. conductor wire 32 The part being connected with the secondary grid line in the front of a cell piece 31 constitutes the front side conductive line 32A of cell piece.

In some detailed description of the invention of the application, cell piece 31 is multiple to constitute cell piece array 30, adjacent cell sheet It is connected by many conductor wires 32 between 31.Conductor wire 32 is made up of tinsel S, and tinsel S is electrically connected with cell piece 31 Connecing, tinsel S reciprocation extension constitutes conductor wire between the surface of adjacent cell sheet 31.

When cell piece 31 is one another in series by tinsel S, in adjacent cell sheet 31 one of tinsel S reciprocation extension Between front and the back side of another cell piece 31 of cell piece 31.

In this embodiment, also being provided with transparent film layer 60 between described back side adhesive film 40 and another cell piece described, this is saturating The surface that bright film layer 60 is relative with another cell piece described is provided with described conductor wire 32, and described conductor wire 32 is embedded into this In transparent film layer 60 and expose in this transparent film layer 60, described conductor wire 32 by connecting material layer 322 with described another The back electrode 314 of individual cell piece is connected；The part that described conductor wire 32 is connected with the back electrode 314 of another cell piece described Constitute the back side conductor wire 32B of another cell piece.

In this embodiment, described connecting material layer 322 is located at tinsel body and the institute constituting described front side conductive line 32A State the connected link position of secondary grid line 312 or the whole length cladding along the tinsel body constituting described front side conductive line 32A On this tinsel body；Described connecting material layer 322 is located at tinsel body and the institute constituting described back side conductor wire 32B State the connected link position of back electrode 314 or the whole length cladding along the tinsel body constituting described back side conductor wire 32B Body on the wire.

It is to say, the part that tinsel S extends on the front of a cell piece 31 constitutes front side conductive line 32A, metal The part that silk S extends on the back side of another adjacent cell sheet 31 constitutes back side conductor wire 32B.In this application, unless separately Clearly stating, conductor wire 32 can be understood as front side conductive line 32A, back side conductor wire 32B, or front side conductive line 32A With back side conductor wire 32B.

It is to say, in the solar module 100 of the application, the front of a cell piece 31 is provided with front side conductive line 32A, the back side of another adjacent cell sheet 31 is additionally provided with back side conductor wire 32B, and the front being positioned at cell piece 31 front is led Electric wire 32A is provided with connecting material layer 322, and the secondary grid line 312 of front side conductive line 32A and this cell piece 31 is by being connected material The bed of material 322 is connected, and is positioned on the back side conductor wire 32B at another adjacent cell sheet 31 back side and also is provided with connecting material layer 322, Back side conductor wire 32B is connected with the back electrode 314 of another cell piece 31 described by connecting material layer 322.

The connecting material layer 322 coverage on tinsel body 321 can be to be coated with whole tinsel body 321, it is possible to Being only to be coated on the position that tinsel body 321 needs to be connected with secondary grid line 312 or back electrode 314.

It should be noted that in this application, tinsel S refers to that reciprocation extension forms conductor wire 32 on cell piece 31 Tinsel, tinsel S includes tinsel body 321 and the connecting material layer 322 being coated on tinsel body, i.e. conducts electricity Line 32 includes tinsel body 321 and the connecting material layer 322 being coated on tinsel body, in embodiments herein, If without specified otherwise, tinsel refers to that reciprocation extension forms the tinsel S of conductor wire 32 on cell piece 31.

Specifically, for the conductor wire 32B of the back side, connecting material layer 322 is located at the metal constituting back side conductor wire 32B The silk link position that is connected with back electrode 314 of body 321 or tinsel body 321 whole along composition back side conductor wire 32B Individual length is coated on this tinsel body 321.

For front side conductive line 32A, connecting material layer 322 is located at the tinsel body 321 constituting front side conductive line 32A The link position being connected with secondary grid line 312 or the whole length cladding of the tinsel body 321 along composition front side conductive line 32A On this tinsel body 321.

In this application, conductor wire 32 (including front side conductive line 32A and back side conductor wire 32B) can be by the side of welding Method is embedded on transparent film layer 60.The method of welding may include that and is arranged on the surface of transparent film layer 60 by conductor wire 32, Then conductor wire 32 being heated (such as electrical heating), the part making transparent film layer 60 contact with conductor wire 32 softens or molten Change, thus together with conductor wire 32 is welded and fixed on transparent film layer 60.

Preferably, one end of conductor wire 32 can be arranged on the lower surface of transparent film layer 60, by another of conductor wire 32 End is arranged on the upper surface of another transparent film layer 60, then conductor wire 32 is heated (such as electrical heating), makes hyaline membrane The part that layer 60 contacts with conductor wire 32 softens or fusing, thus conductor wire 32 and transparent film layer 60 are welded and fixed on one Rise.Then the just front to cell piece 31 by the transparent film layer 60 of lower surface welding conductor wire, so that conductor wire 32 and battery The secondary grid line 312 in front connect, and the just back side to cell piece 31 by the transparent film layer 60 of upper surface welding conductor wire, So that conductor wire 32 is connected with the back electrode 314 at the back side of another adjacent cell；The pair in the front of conductor wire 32 and cell piece The part that grid line is connected constitutes front side conductive line 32A, and conductor wire 32 is connected with the back electrode at the back side of another adjacent cell sheet Part constitutes back side conductor wire 32B.

Conductor wire 32 not exclusively embeds transparent film layer 60, and the part of conductor wire 32 highlights from transparent film layer 60, this conductor wire 32 parts highlighting transparent film layer 60 at least contain low-melting alloy layer so that conductor wire 32 with on cell piece 31 sensitive surface Secondary grid line 312 or form Ohmic contact with the back electrode 314 at the back side of cell piece 31, conductor wire 32 is made a comment or criticism face conductor wire 32A, back side conductor wire 32B, front side conductive line 32A and back side conductor wire 32B.

In some detailed description of the invention of the application, transparent film layer 60 is formed by the transparent material that fusing point is more than 160 DEG C. In this embodiment, it is ensured that during lamination, occur melted at front adhesive film 20 and back side adhesive film 40 In the case of, transparent film layer 60 will not melt, thus to guarantee that the conductor wire 32 being fused in transparent film layer 60 will not Drift about.

Preferably, transparent film layer 60 is by polyethylene terephthalate (PET), polybutylene terephthalate (PBT) (PBT) Formed with at least one in polyimides (PI).

In this application, the thickness of transparent film layer 60 can be 50-200 micron, namely is positioned at the transparent of cell piece 31 front Film layer 60 can be 50-200 micron with the thickness of the transparent film layer 60 being positioned at cell piece 31 back side the most respectively.Further Ground, for making solar module 100 show of a relatively high electricity conversion, the light transmittance of transparent film layer 60 is preferred It is not less than 90%.

In this application, connecting material layer 322 is weld layer or conducting resinl, and described weld layer is alloy-layer, below to connect Material layer 322 is described in detail for alloy-layer.

Specifically, in this application, alloy contains Sn, Bi and is selected from Cu, In, Ag, Sb, Pb and Zn at least A kind of.

Preferably, in the alloy, on the basis of the gross weight of this alloy, the content of Bi is 15-60 weight %, the content of Sn For 30-75 weight %, the content of Cu is 0-20 weight %, and the content of In is 0-40 weight %, and the content of Ag is 0-3 weight The content of %, Sb is 0-20 weight %, and the content of Pb is 0-10 weight %, and the content of Zn is 0-20 weight %.

Further, alloy can be selected from 50%Sn-48%Bi-1.5%Ag-0.5%Cu, 58%Bi-42%Sn and At least one in 65%Sn-20%Bi-10%Pb-5%Zn.

Alternatively, the thickness of connecting material layer 322 is 1-100 micron, and the cross-sectional area of tinsel body 321 is 0.01-0.5 Square millimeter.Preferably, the thickness of connecting material layer 322 is 0.02-0.5:1 with the diameter ratio of tinsel body 321.

Alternatively, the position contacted with secondary grid line 312 and/or the back electrode 314 of cell piece 31 at tinsel body 321 sets Being equipped with connecting material layer 322, connecting material layer 322 is weld layer or conducting resinl, it is highly preferred that at tinsel body 321 The position contacted with secondary grid line 312 and the back electrode 314 of cell piece 31 is provided with weld layer.Weld layer can be low melting point Metal or alloy.Ashbury metal can be conventional ashbury metal, can be such as stannum and in Bi, Pb, Ag and Cu extremely The alloy of few a kind of metal, specifically, such as SnBi, SnPb, SnBiCu, SnPbAg etc..So can avoid tinsel Between body 321 and the secondary grid line 312 of cell piece and/or back electrode 314, rosin joint occurs so that the solar-electricity of final preparation Pond assembly has of a relatively high electricity conversion.

In some detailed description of the invention of the application, cell piece 31 is multiple to constitute cell piece array 30, adjacent cell sheet Between 31 by tinsel S-phase even, the surface of a tinsel S reciprocation extension cell piece 31 in adjacent cell sheet 31 And between the surface of another cell piece 31.

Specifically, multiple cell piece 31 is included according to the solaode chip arrays 30 of the embodiment of the present application.Adjacent cell sheet It is connected by many conductor wires 32 between 31.Conductor wire 32 is made up of tinsel S, and tinsel S is electrically connected with cell piece 31 Connecing, tinsel S reciprocation extension is between the surface of adjacent cell sheet 31.

Here, cell piece 31 constitutes battery with the conductor wire 32 being made up of the tinsel S extended on this cell piece 31 surface Unit, in other words, is made up of multiple battery units according to the solaode chip arrays 30 of the embodiment of the present application, multiple batteries The conductor wire 32 of unit is made up of reciprocation extension tinsel S on the surface of adjacent cell sheet 31.

It is to be appreciated that in this application, term " reciprocation extension " is referred to as " coiling ", may refer to tinsel S extends along reciprocal stroke between the surface of cell piece 31.

In this application, " tinsel S reciprocation extension is between the surface of adjacent cell sheet 31 " should broadly understood, such as, Tinsel S can be with the table on the surface of a reciprocation extension cell piece 31 in adjacent cell sheet 31 Yu another cell piece 31 Between face, tinsel S can also extend through intermediate cell sheet 31 table of predetermined quantity from the surface of first cell piece 31 Face, to the surface of last cell piece 31, then returns from the surface of last cell piece 31 and extends through described pre- The surface of the intermediate cell sheet 31 of determined number, to the surface of first cell piece 31, is so repeated.

Additionally, when cell piece 31 is by tinsel S parallel connection, tinsel S can be with reciprocation extension in the front of cell piece 31 On, in the case, tinsel S constitutes the front side conductive line 32A of cell piece, and alternatively, tinsel S reciprocation extension exists On the front of cell piece 31 and different tinsel S reciprocation extension is on the back side of cell piece 31, in the case, extend Tinsel S on cell piece 31 front constitutes front side conductive line 32A, extends in the tinsel S at the back side of cell piece 31 Constitute back side conductor wire 32B.

When cell piece 31 is one another in series by tinsel S, in adjacent cell sheet 31 one of tinsel S reciprocation extension Between front and the back side of another cell piece 31 of cell piece 31, in the case, tinsel S is at a cell piece 31 Front on extend part constitute front side conductive line 32A, tinsel S extend on the back side of another cell piece 31 adjacent Part constitute back side conductor wire 32B.In this application, unless expressly stated otherwise, conductor wire 32 can be understood as front Conductor wire 32A, back side conductor wire 32B, or front side conductive line 32A and back side conductor wire 32B.

Here, term " reciprocation extension " can be understood as tinsel S and extends " one is reciprocal " two conductor wires 32 of formation, Two conductor wires are formed by an one metal wire S coiling, and such as, adjacent two conductor wires form U-shaped structure or V-arrangement Structure, but the application is not limited to this.

Cell piece array 30 according to the embodiment of the present application, the conductor wire 32 of multiple cell pieces 31 is by the tinsel of reciprocation extension S is constituted, and is connected by conductor wire 32 between adjacent cell sheet 31, and therefore, the conductor wire 32 of cell piece is without using Expensive silver slurry, and manufacturing process is simple, it is not necessary to use welding to connect the pair of cell piece, tinsel S and cell piece Grid line and back electrode easy to connect, the cost of cell piece is substantially reduced.

Additionally, due to conductor wire 32 is made up of the tinsel S of reciprocation extension, (i.e. tinsel is at electricity for the width of conductor wire 32 The width of the projection on the sheet of pond) can reduce, reduce the shading-area of conductor wire 32, and, the quantity of conductor wire 32 Can adjust easily, compared with the main gate line that silver slurry is formed, the resistance of conductor wire 32 reduces, and improves photoelectric transformation efficiency. Owing to tinsel S reciprocation extension forms conductor wire, when using cell piece array 30 to manufacture solar module 100, gold Belong to silk S and be difficult to displacement, i.e. tinsel " drift " is less likely to occur, does not interferes with photoelectric transformation efficiency, further increase light Photoelectric transformation efficiency.

Therefore, according to the solaode chip arrays 30 of the embodiment of the present application, low cost, photoelectric transformation efficiency are high.

It is further to note that in this application, conductor wire 32 can be by reciprocation extension between the surface of adjacent cell sheet Tinsel S formed, it is also possible to formed by multiple tinsel spaced-apart relation parallel to each other and independent of each other.By each other Independent multiple tinsels are spaced the technical scheme of the main gate line forming traditional structure It should be understood that be therefore not described in detail.

Below with reference to the accompanying drawings solaode chip arrays 30 according to the application specific embodiment is described.

With reference to Fig. 1-3, the solaode chip arrays 30 according to one specific embodiment of the application is described.

In the embodiment shown in Fig. 1-3, it is shown that two cell pieces 31 of solaode chip arrays 30, in other words, show Two cell pieces 31 that the conductor wire 32 by being made up of is connected with each other are gone out tinsel S.

It is understood that cell piece 31 includes cell piece matrix 311, secondary grid on the front that is located at cell piece matrix 311 Line 312 (i.e. front pair grid line 312A), the back of the body electric field 313 being located on the back side of cell piece matrix 311 and be located at back of the body electric field Back electrode 314 on 313.In this application, it is to be understood that unless expressly stated otherwise, back electrode 314 can be The back electrode of conventional batteries sheet, such as, formed by silver slurry printing, it is also possible to the secondary grid line being analogous on cell piece front side of matrix Back side pair grid line 312B, it is also possible to for discrete multiple weld parts, in this application, unless expressly stated otherwise, secondary grid Line refers to the secondary grid line 312 on the front of cell piece matrix 311.

As Figure 1-3, in this embodiment, solaode chip arrays includes two cell piece 31A, and 31B is (in order to retouch State conveniently, the referred to herein as first cell piece 31A, the second cell piece 31B), tinsel S reciprocation extension is at the first cell piece 31A Front (sensitive surface, the upper surface in Fig. 2) and the back side of the second cell piece 31B between, thus, tinsel S constitute The front side conductive line of the first cell piece 31A and the back side conductor wire of the second cell piece 31B, tinsel S and the first battery The secondary grid line of sheet 31A electrically connects (such as weld or bond with conducting resinl) and electrically connects with the back electrode of the second cell piece 31B.

In certain embodiments, tinsel reciprocation extension 10-60 time between the first cell piece 31A and the second cell piece 31B To form 20-120 root conductor wire, it is preferable that as it is shown in figure 1, tinsel reciprocation extension 12 times is to form 24 conductions Line 32, and tinsel is single, in other words, single metal wire reciprocation extension forms 24 conductor wires, adjacent conductive 12 times Spacing between line can be 2.5 millimeters-15 millimeters.According to this embodiment, compared with the conductor wire of conventional batteries sheet, number Amount increases, thus reduces electric current from secondary grid line to the distance of conductor wire, decreases resistance, improves electricity conversion. In the embodiment shown in fig. 1, adjacent conductive line forms U-shaped structure, is thus easy to coiling wiry.Alternatively, originally Application is not limited to this, and such as, adjacent conductive line can also form v-shaped structure.

In some embodiments it may be preferred that tinsel body 321 is copper wire, but the application is not limited to this, such as metal Silk body 321 can also be aluminium wire.Preferably, tinsel S has circular cross section, and thus, more sunlight is permissible It is irradiated on cell piece matrix, improves photoelectric transformation efficiency further.

In some embodiments it may be preferred that before tinsel S contacts with cell piece, tinsel S is the most past Multiple extension, will stretch by tinsel S, after being connected with the secondary grid line and back electrode of cell piece, can discharge tinsel S Tensile force, avoid when preparing solar module conductor wire drift to affect photoelectric transformation efficiency the most further.

In some detailed description of the invention of the application, the width of secondary grid line 312 is 40-80 micron, and thickness is 5-20 micron, Secondary grid line 312 is 50-120 bar, and the spacing of adjacent two secondary grid lines 312 is 0.5-3mm.Thus, this pair grid line 312 More reasonable structure, there is bigger Shouguang area, photoelectric transformation efficiency is higher.

Preferably, the adhesion between tinsel S and cell piece 31 is in the range of 0.1-0.8 newton.It is to say, lead Adhesion between electric wire 32 and cell piece 31 is between 0.1-0.8 newton.Preferably, tinsel S and cell piece 31 it Between adhesion in the range of 0.2-0.6 newton.Thus, firm welding between cell piece and tinsel, cell piece is in operation With transfer process is difficult to sealing-off occurs, be difficult to that loose contact occurs and the problem of hydraulic performance decline that causes, cost is the most simultaneously Low.

Fig. 5 shows the schematic diagram of the cell piece array of another embodiment according to the application.As it is shown in figure 5, tinsel S Reciprocation extension is between the front of the front of the first cell piece 31A and the second cell piece 31B, and thus, tinsel S forms the The front side conductive line of one cell piece 31A and the front side conductive line of the second cell piece 31B, in the case, the first cell piece 31A Be connected in parallel to each other with the second cell piece 31B, it is, of course, understood that preferably, the back electrode of the first cell piece 31A and The back electrode of the second cell piece 31B can also be connected by the back side conductor wire that another tinsel S reciprocation extension is formed, optional Ground, the back electrode of the first cell piece 31A and the back electrode of the second cell piece 31B can also be connected by the way of traditional.

Figure 12 shows the schematic diagram of the cell piece array of the another embodiment according to the application.As shown in figure 12, cell piece The short grid line 33 in the front of 31 and secondary grid line 312, described secondary grid line 312 includes the middle secondary grid line intersected with described conductor wire The edge pair grid line not intersected with described conductor wire, described short grid line is connected with described edge pair grid line, and described short grid line Grid line secondary with in the middle of described conductor wire or at least one is connected.Preferably, short grid line 33 is perpendicular to secondary grid line 312.

Thus, by arranging short grid line 33 on the secondary grid line 312 of the edge portions of cell piece 31 sensitive surface, so can keep away Exempt from the secondary grid line 312 of the edge portions owing to being unable to reach cell piece 31 during arranging in conductor wire 32 coiling and cause Portion of electrical current waste such that it is able to improve further the electricity conversion of solar module 100.

Below with reference to Fig. 6, the solaode chip arrays 30 according to another embodiment of the application is described.

Solaode chip arrays 30 according to the embodiment of the present application includes n × m cell piece 31, in other words, multiple batteries Sheet 31 is arranged into the matrix form of n × m, and wherein n is columns, and m is row.More specifically, in this embodiment, 36 Individual cell piece 31 is arranged in 6 row and 6 rows, i.e. n=m=6.It is understood that the application is not limited to this, such as, row Number and columns can be unequal.For convenience, in figure 6, along direction from left to right, in same row's cell piece 31 Cell piece 31 be referred to as the first, second, third, fourth, the 5th and the 6th cell piece 31 successively, along side from the top down To, the row of cell piece 31 is referred to as the first, second, third, fourth, the 5th and the 6th row's cell piece 31 successively.

In same row's cell piece 31, tinsel S reciprocation extension is at the surface of a cell piece 31 and another adjacent battery Between the surface of sheet 31, in two adjacent row's cell pieces 31, a tinsel S reciprocation extension battery in a arranges Between the surface of a cell piece 31 in the surface of sheet 31 and a+1 row, and m-1 >=a >=1.

As shown in Figure 6, in concrete example, in same row's cell piece 31, tinsel S reciprocation extension is at a battery Between the front of sheet 31 with the back side of another adjacent cell piece 31, thus, the cell piece 31 in same row is one another in series. In two adjacent row's cell pieces 31, tinsel S reciprocation extension is just being positioned at the cell piece 31 of the end that a arranges Face and a+1 row end a cell piece 31 the back side between, the most adjacent two row's cell pieces 31 are one another in series.

It is highly preferred that in adjacent two row's cell pieces 31, tinsel reciprocation extension is at the battery of the end being positioned at a row The surface of sheet 31 and between the surface of the cell piece 31 of an end of a+1 row, an end of a row and the One end of a+1 row is positioned at the same side of matrix, the most in figure 6, is positioned at the right side of matrix.

More specifically, in the embodiment shown in fig. 6, in the first row, one metal wire reciprocation extension first cell piece Between the back side between front and second cell piece 31 of 31, the front of second one metal wire reciprocation extension the second cell piece 31 And between the back side between the 3rd cell piece 31, the front of the 3rd one metal wire reciprocation extension the 3rd cell piece 31 and the 4th electricity Between the back side between pond sheet 31, the front of the 4th one metal wire reciprocation extension the 4th cell piece 31 and the 5th cell piece 31 it Between the back side between, the back side between front and the 6th cell piece 31 of the 5th one metal wire reciprocation extension the 5th cell piece 31 Between, thus, the adjacent cell sheet 31 in first row is one another in series by corresponding tinsel.

The front of the 6th cell piece 31 in six roots of sensation tinsel reciprocation extension first row and the 6th battery in adjacent second row Between the back side between sheet 31, thus, first row and second row are one another in series, in the 7th one metal wire reciprocation extension second row The front of the 6th cell piece 31 and second row between the back side between the 5th cell piece 31, the 8th one metal wire back and forth prolongs Stretch in the front of the 5th cell piece 31 in second row and second row between the back side between the 4th cell piece 31, until the tenth The back of the body between first cell piece 31 in the front of the second cell piece 31 in one one metal wire reciprocation extension second row and second row Between face, then, in the front of the first cell piece 31 in the 12nd one metal wire reciprocation extension second row and the 3rd row first Between the back side between cell piece 31, thus second row and the 3rd row are one another in series.Then, successively by the 3rd row and the 4th row Series connection, the 4th row connects with the 5th row, and the 5th row connects with the 6th row, thus completes the preparation of cell piece array 30, at this In embodiment, busbar is set in the left side in the left side of the first cell piece 31 of first row and first cell piece 31 of the 6th row, One busbar connects the conductor wire extended from the left side of the first cell piece 31 of first row, and another busbar connects from the 6th The conductor wire that the left side of first cell piece 31 of row is extended.

As shown in the figure and above-mentioned, between the cell piece of the embodiment of the present application, it is connected by conductor wire series connection, first row, second Row, the 3rd row, the 4th row, conductor wire between the 5th row and the 6th row, is all used to realize series connection, as it can be seen, alternatively, Can also be in parallel for preventing the diode of spottiness between second row and the 3rd row, between the 4th row and the 5th row, two The connection of pole pipe can use the technology of well known to a person skilled in the art, such as busbar.

But, the application is not limited to this, such as, can connect between first row and second row, the 3rd row and the 4th row string Connection, the 5th row and the 6th row series connection, second row and the 3rd row are in parallel simultaneously, and the 4th row and the 5th row are in parallel, in the case, Can arrange in the left side of respective row or right side and be respectively provided with busbar.

Alternatively, the cell piece 31 in same row can be in parallel, such as, and the one metal wire the first cell piece from first row The front reciprocation extension of 31 front by the second to the 6th cell piece 31.

In some detailed description of the invention of the application, the size for conventional cell piece is 156mm × 156mm；Solar energy The series resistance of battery component is 380-440 milliohm/60 slice, and the application is not limited to 60 simultaneously, can be 30, 72 etc., when for 72, the series resistance of solar module is 456-528 milliohm, the excellent electrical property of battery.

In some detailed description of the invention of the application, the size for conventional cell piece is 156mm × 156mm；Solar energy The open-circuit voltage of battery component is 37.5-38.5V/60 sheet, and same the application is not limited to 60, can be 30,72 Sheet etc..Short circuit current is 8.9-9.4A, and short circuit current is unrelated with the number of cell piece.

In some detailed description of the invention of the application, the fill factor, curve factor of solar module is 0.79-0.82, and it is not by electricity The size of pond sheet and the impact of number, it affects the electrical property of battery.

In some detailed description of the invention of the application, the size for conventional cell piece is 156mm × 156mm；Solar energy The running voltage of battery component is 31.5-32V/60 sheet, and same the application is not limited to 60, can be 30,72 Sheet etc..Operating current is 8.4-8.6A, and operating current is unrelated with the number of cell piece.

In some detailed description of the invention of the application, the size for conventional cell piece is 156mm × 156mm；Solar energy The conversion efficiency of battery component is 16.5-17.4%.Power is 265-280W/60 sheet.

The preparation method of the solar module 100 according to the embodiment of the present application is described below with reference to Fig. 7-9.

The preparation method of the solar module 100 according to the embodiment of the present application includes first by leading of being made up of tinsel S In electric wire 32 is fused to transparent film layer 30 and tinsel S exposes in transparent film layer, wherein, tinsel S includes tinsel Body 321 and the connecting material layer 322 being applied on tinsel body 321.

Then by upper cover plate 10, front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50 It is sequentially stacked, is then laminated, to obtain solar module 100, wherein, conductor wire 32 and cell piece 31 Secondary grid line 312 is connected by connecting material layer 322, and the fusing point of transparent film layer 60 is higher than front adhesive film 20 and back side glued membrane The fusing point of layer 40.

In other words, according to the solar module 100 of the application in the preparation, can first conductor wire 32 be arranged in transparent On the surface of film layer 60, conductor wire is made up of tinsel S, and tinsel S includes tinsel body 321 and is coated on tinsel Connecting material layer 322 on body 321, then conductor wire 32 is heated (such as electrical heating), make transparent film layer 60 The part contacted with conductor wire 32 softens or fusing, thus together with conductor wire 32 is welded and fixed on transparent film layer 60, and And make tinsel S expose in transparent film layer 60.

Then by upper cover plate 10, front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50 Being sequentially stacked, the secondary grid line 312 in cell piece 31 front directly contacts with conductor wire 32 and passes through connecting material layer 322 and is connected, After upper cover plate 10, front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50 are carried out Lamination i.e. can get the above-mentioned solar module of the application 100.

Preferably, one end of conductor wire 32 can be arranged on the lower surface of transparent film layer 60, by another of conductor wire 32 End is arranged on the upper surface of another transparent film layer 60, then conductor wire 32 is heated (such as electrical heating), makes hyaline membrane The part that layer 60 contacts with conductor wire 32 softens or fusing, thus conductor wire 32 and transparent film layer 60 are welded and fixed on one Rise.Then the just front to cell piece 31 by the transparent film layer 60 of lower surface welding conductor wire, so that conductor wire 32 and battery The secondary grid line 312 in front connect, and the just back side to cell piece 31 by the transparent film layer 60 of upper surface welding conductor wire, So that conductor wire 32 is connected with the back electrode 314 at the back side of another adjacent cell；Described conductor wire 32 and the front of cell piece The part that is connected of secondary grid line constitute front side conductive line 32A, the back of the body electricity at described conductor wire 32 and the back side of another adjacent cell sheet The part being extremely connected constitutes back side conductor wire 32B.

Upper cover plate 10, front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50 are depended on Secondary stacked, the secondary grid line 312 in cell piece 31 front directly contacts with conductor wire 32 and passes through connecting material layer 322 and is connected, The back electrode at the back side of another adjacent cell sheet 31 directly contacts with conductor wire 32 and passes through connecting material layer 322 and is connected, after Upper cover plate 10, front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50 are carried out layer Pressure i.e. can get the above-mentioned solar module of the application 100.

Specifically, as it is shown in fig. 7, in a tensioned state, melt after tinsel S reciprocation extension 12 times with transparent film layer 60 Connect.Then, as shown in Figure 8, the first cell piece 31A and the second cell piece 31B is prepared.It follows that as it is shown in figure 9, The front of the first cell piece 31A is connected with tinsel and the back side of the second cell piece 31B is connected with tinsel, thus shape Become cell piece array 30, Fig. 9 shows two cell pieces 31, as above, when cell piece array 30 has multiple cell piece When 31, utilize the tinsel back side phase by the front of a cell piece 31 with another adjacent cell piece 31 of reciprocation extension Even, will connect with the back electrode tinsel S-phase of another cell piece 31 by the secondary grid line of a cell piece 31.Tinsel leads to Cross and lay respectively at reciprocation extension under two clip tensionings of these two ends of root silk.

In the embodiment shown in fig. 9, adjacent cell sheet is one another in series, and as above, as required, adjacent cell sheet can lead to Cross tinsel to be connected in parallel to each other.

By the cell piece array 30 prepared and upper cover plate 10, front adhesive film 20, transparent film layer 60, cell piece array 30, back side adhesive film 40 and backboard 50 are sequentially stacked, and make the front of cell piece 31 in the face of transparent film layer 60, hyaline membrane Conductor wire 32 on layer 60 contacts with the secondary grid line 312 on cell piece 31, and the back side of cell piece 31 is in the face of back side adhesive film 40, then carry out lamination and obtain solar module 100.

The solar module 100 of the application is described below in conjunction with concrete example.

Example 1

Example 1 is for the example of the solar module 100 that the application is described and preparation method thereof.

(1) tinsel S is prepared

Adhering to one layer of Sn40%-Bi55%-Pb5% alloy-layer on the surface of copper wire, wherein, the cross-sectional area of copper wire is 0.04mm², The thickness of alloy-layer is 16 microns, thus prepares tinsel S.

Making conductor wire at the state reciprocation extension of tension, conductor wire is opened by laying respectively at two clips of these two ends of root silk Tight lower reciprocation extension, thus form 15 parallel conductor wires, and the distance between the adjacent conductive line being parallel to each other is 9.9mm。

Then a part for conductor wire is arranged on the surface of the transparent film layer that PET film is prepared from, then conductor wire is entered Row heating, the part making transparent film layer contact with conductor wire softens or fusing, thus is melted with transparent film layer by this partially electronically conductive line Connect and be fixed together, and make tinsel expose in transparent film layer.

(2) solar module 100 is prepared

The POE adhesive film (melt temperature is 65 DEG C) of a size of 1630 × 980 × 0.5mm is provided, and size is correspondingly provided Be glass plate and 60 chip sizes of 1633 × 985 × 3mm be the polycrystalline silicon battery plate of 156 × 156 × 0.21mm.Cell piece has Having 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), every secondary grid line is the most in the vertical Running through the distance between cell piece, and adjacent pair grid line is 1.7mm, and the back side of cell piece has 5 back electrodes, and (material is Stannum, width is 1.5 millimeters, and thickness is 10 microns), every back electrode runs through cell piece the most in the vertical, and adjacent Article two, the distance between back electrode is 31mm.

60 cell pieces are arranged with a matrix type (6 rows 10 arrange), between two cell pieces adjacent in same row, The welding transparent film layer of conductor wire is placed in the front of one cell piece, and the secondary grid line of this cell piece contacts with conductor wire, Another part conductor wire of non-welding stretches into the back side of another cell piece and is connected with the back electrode at the back side of another cell piece.

Then, by upper glass plates, upper POE adhesive film, in the matrix form arrangement and be connected with tinsel multiple cell pieces, Lower POE adhesive film and lower glass plate stack the most successively, wherein, make front adhesive film 20 faced by the sensitive surface of cell piece, Make the back side of cell piece in the face of back side adhesive film 40, be subsequently placed in laminating machine and be laminated, thus prepare solar battery group Part A1.

Comparative examples 1

Comparative examples 1 is with the difference of example 1: arranged with a matrix type by cell piece, is cascaded 15 Tinsel is pasted at transparent adhesive film layer, is pasted by tinsel on solar battery sheet, between two adjacent cell pieces, Then tinsel connects the back side of the front of a cell piece and another cell piece, by upper glass plates, upper POE adhesive film, Transparent adhesive film layer, in the matrix form arrangement and the multiple cell pieces being connected with tinsel, transparent adhesive film layer, lower POE adhesive film Stack the most successively with lower glass plate.Thus prepare solar module D1.

Example 2

Example 2 is for the example of the solar module that the application is described and preparation method thereof.

Adhering to one layer of epoxide resin conductive adhesive on the surface of copper wire, wherein, the cross-sectional area of copper wire is 0.04mm², asphalt mixtures modified by epoxy resin The thickness of fat conducting resinl is 16 microns, thus prepares tinsel S.

Making conductor wire at the state reciprocation extension of tension, conductor wire is opened by laying respectively at two clips of these two ends of root silk Tight lower reciprocation extension, thus form 20 parallel conductor wires, and the distance between the adjacent conductive line being parallel to each other is 9.9mm。

(2) solar module 100 is prepared

Then, by upper glass plates, upper POE adhesive film, in the matrix form arrangement and be connected with tinsel multiple cell pieces, Lower POE adhesive film and lower glass plate stack the most successively, wherein, make front adhesive film 20 faced by the sensitive surface of cell piece, Make the back side of cell piece in the face of back side adhesive film 40, be subsequently placed in laminating machine and be laminated, thus prepare solar battery group Part A2.

Example 3

Method according to example 1 prepares solar module, the difference with example 1 is: at the sensitive surface of cell piece Arranging short grid line 33 (material is silver, and width is 0.1mm) on secondary grid line 312, this short grid line 33 is vertical with secondary grid line 312, For connecting secondary grid line 312 and the conductor wire 32 of the edge portions of the sensitive surface of cell piece, as shown in figure 12, thus prepare Solar module A3.

Example 4

Method according to example 1 prepares solar module, and the difference of example 1 is: between the cell piece of 6 row 6 row Connected mode be: between two adjacent row's cell pieces, the conductor wire battery of an end from a (a >=1) arranges The sensitive surface of sheet extends and electrically connects with the back side formation of the cell piece of adjacent end portion in a+1 row, is used for realizing adjacent two Connection between row's cell piece, and for connect the conductor wire of adjacent two row's cell pieces with for being connected adjacent cell in this two row The conductor wire of sheet is mutually perpendicular to arrange.So prepare solar module A4.

Test case 1

(1) whether drifted about by the tinsel in naked-eye observation method observation solar module；

(2) use single flash operation simulator that above-mentioned example and comparative examples are prepared too according to method disclosed in IEC904-1 Sun can battery component test, test condition be standard test condition (STC): light intensity be 1000W/m²；Spectrum is AM1.5； Temperature is 25 DEG C, records the photoelectric transformation efficiency of each cell piece.

Result is as shown in table 1 below.

Solar module	A1	D1	A2	A3	A4
						Tinsel drift phenomenon	Nothing	Seriously	Nothing	Nothing	Nothing
Photoelectric transformation efficiency	16.50%	15.30%	16.70%	17.00%	16.80%
						Series resistance/milliohm	458	515	445	433	448
Fill factor, curve factor	0.779	0.742	0.783	0.79	0.781
						Open-circuit voltage/V	37.65	37.52	37.75	37.86	37.81
Short circuit current/A	9.048	8.836	9.085	9.143	9.154
						Running voltage/V	31.15	30.32	31.34	31.76	31.69
Operating current/A	8.52	8.117	8.571	8.61	8.53
						Power/W	265.4	246.1	268.6	273.4	270.3

Wherein, fill factor, curve factor represents maximum power point power and peak power during zero internal resistance in theory of solar module The ratio of (i.e. open-circuit voltage * short circuit current), characterizes the actual power close degree to theoretical maximum power, and this value is the biggest, Illustrating that photoelectric transformation efficiency is the highest, general series resistance is little, and fill factor, curve factor is the biggest；Photoelectric transformation efficiency is that finger assembly is in standard (light intensity 1000W/m under illumination condition²), assembly converts light energy into the ratio of electric energy；Series resistance is equivalent to solar components Internal resistance, its value is the biggest, and assembly property is the poorest；Fill factor, curve factor, represents actual peak power and the theoretical maximum power of assembly Ratio, numerical value is the biggest, and assembly property is the best；Open-circuit voltage is assembly voltage under standard illumination condition, during open circuit； During short circuit current, assembly is under standard illumination condition, electric current during short circuit；Running voltage be assembly under standard illumination condition, Output voltage when working with peak power；Operating current be assembly under standard illumination condition, when working with peak power Output electric current；Power be finger assembly under standard illumination condition, the peak power that can reach

By the result of table 1 it can be seen that the solar module of the embodiment of the present application will not occur the problem that tinsel drifts about, And of a relatively high photoelectric transformation efficiency can be obtained.

In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", Orientation or the position relationship of the instruction such as " outward ", " clockwise ", " counterclockwise " are based on orientation shown in the drawings or position relationship, It is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must have specific Orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed Or implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or two Above, unless otherwise expressly limited specifically.

In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, permissible It it is the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood as the case may be Language concrete meaning in the present invention.

In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score Can include that the first and second features directly contact, it is also possible to include that the first and second features are not directly contact but logical Cross the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " on Face " include that fisrt feature directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than the Two features.Fisrt feature second feature " under ", " lower section " and " below " include that fisrt feature is special second Directly over levying and oblique upper, or it is merely representative of fisrt feature level height less than second feature.

In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ", Or specific features, structure, material or the feature that the description of " some examples " etc. means to combine this embodiment or example describes It is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is differed Surely identical embodiment or example are referred to.And, the specific features of description, structure, material or feature can be any One or more embodiments or example in combine in an appropriate manner.

Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary, Being not considered as limiting the invention, those of ordinary skill in the art is without departing from the principle of the present invention and the situation of objective Under above-described embodiment can be changed within the scope of the invention, revise, replace and modification.

Claims

1. a solar module, it is characterised in that the upper cover plate that includes being sequentially stacked, front adhesive film, cell piece, Back side adhesive film and backboard, described cell piece has secondary grid line, is provided with transparent between described front adhesive film and described cell piece Film layer, the surface that described transparent film layer is relative with described cell piece is provided with conductor wire, and described conductor wire is embedded into described transparent In film layer and exposing in described transparent film layer, described conductor wire is made up of tinsel and is connected with described secondary grid line, described The fusing point of bright film layer is higher than described front adhesive film and the fusing point of described back side adhesive film, and described tinsel includes tinsel body With the connecting material layer being coated on tinsel body, described conductor wire is connected with described secondary grid line by connecting material layer.

Solar module the most according to claim 1, it is characterised in that described transparent film layer is 160 by fusing point Transparent material more than DEG C is formed.

Solar module the most according to claim 2, it is characterised in that described transparent film layer is by poly-terephthaldehyde At least one in acid glycol ester, polybutylene terephthalate (PBT) and polyimides is formed.

4. according to the solar module according to any one of claim 1-3, it is characterised in that described transparent film layer Thickness is 50-200 micron, and light transmittance is not less than 90%.

5. according to the solar module according to any one of claim 1-4, it is characterised in that described connecting material layer For conductive adhesive layer.

6. according to the solar module according to any one of claim 1-4, it is characterised in that described connecting material layer For conducting resinl or alloy-layer.

Solar module the most according to claim 6, it is characterised in that described alloy contain Sn, Bi and At least one in Cu, In, Ag, Sb, Pb and Zn.

Solar module the most according to claim 7, it is characterised in that in described alloy, with this alloy On the basis of gross weight, the content of Bi is 15-60 weight %, and the content of Sn is 30-75 weight %, and the content of Cu is 0-20 weight The content of amount %, In is 0-40 weight %, and the content of Ag is 0-3 weight %, and the content of Sb is 0-20 weight %, and Pb contains Amount is 0-10 weight %, and the content of Zn is 0-20 weight %.

Solar module the most according to claim 8, it is characterised in that described alloy is selected from At least one in 50%Sn-48%Bi-1.5%Ag-0.5%Cu, 58%Bi-42%Sn and 65%Sn-20%Bi-10%Pb-5%Zn.

10. according to the solar module according to any one of claim 1-9, it is characterised in that described connecting material The thickness of layer is 1-100 micron, and the cross-sectional area of described tinsel body is 0.01-0.5 square millimeter.

11. solar modules according to claim 1, it is characterised in that the thickness of described connecting material layer with The diameter ratio of described tinsel body is 0.02-0.5:1.

12. according to the solar module according to any one of claim 1-11, it is characterised in that described cell piece is Multiple to constitute cell piece array, it is connected by described tinsel between adjacent cell sheet, described tinsel reciprocation extension is in phase Between surface and the surface of another cell piece of a cell piece in adjacent cell piece.

13. solar modules according to claim 12, it is characterised in that described tinsel is at one electricity Reciprocation extension between front and the back side of another cell piece described of pond sheet.

14. solar modules according to claim 13, it is characterised in that described conductor wire and one electricity The part that the secondary grid line of one cell piece is connected constitutes the front side conductive line of a cell piece, and described connecting material layer is located at composition Link position that the tinsel body of described front side conductive line is connected with described secondary grid line or the gold along the described front side conductive line of composition The whole length belonging to silk body is coated on this tinsel body.

15. solar modules according to claim 13, it is characterised in that described back side adhesive film and described separately Also being provided with transparent film layer between one cell piece, the surface that described transparent film layer is relative with another cell piece described is provided with institute Stating conductor wire, in described conductor wire is embedded into described transparent film layer and expose in described transparent film layer, described conductor wire passes through Connecting material layer is connected with the back electrode of another cell piece described.

16. solar modules according to claim 15, it is characterised in that described conductor wire with described another The part that the back electrode of cell piece is connected constitutes the back side conductor wire of another cell piece, and it is described that described connecting material layer is located at composition Link position that the tinsel body of back side conductor wire is connected with described back electrode or along the tinsel constituting described back side conductor wire The whole length of body is coated on this tinsel body.

17. solar modules according to claim 16, it is characterised in that described conductor wire is by an one metal wire Reciprocal coiling forms.

18. according to the solar module according to any one of claim 12-17, it is characterised in that described tinsel Reciprocation extension 10-60 time.

19. according to the solar module according to any one of claim 12-18, it is characterised in that described tinsel Spacing between adjacent two sections is 2.5-15mm.

20. according to the solar module according to any one of claim 12-19, it is characterised in that adjacent two sections of gold Belong to silk and form U-shaped structure or v-shaped structure.

21. according to the solar module according to any one of claim 1-20, it is characterised in that described cell piece The edge in front has short grid line, and the secondary grid line at the edge of neighbouring described cell piece is connected by described short grid line with described conductor wire.

22. solar modules according to claim 21, it is characterised in that described short grid are perpendicular to described secondary grid Line.

23. according to the solar module according to any one of claim 1-22, it is characterised in that described cell piece is arranged Cloth becomes the matrix form of n × m, and wherein n is columns, and m is row,

In same row's cell piece, described tinsel reciprocation extension is at the surface of a cell piece and another adjacent cell piece Between surface, in two adjacent row's cell pieces, the surface of a described tinsel reciprocation extension cell piece in a arranges And between the surface of a cell piece in a+1 row, and m-1 >=a >=1.

24. solar modules according to claim 23, it is characterised in that in adjacent two row's cell pieces, institute State tinsel reciprocation extension in the surface of the cell piece of the end being positioned at a row and the end being positioned at a+1 row Between the surface of cell piece, the end that an end of described a row and described a+1 arrange is positioned at the same of described matrix Side.

25. solar modules according to claim 24, it is characterised in that in same row's cell piece, described Tinsel reciprocation extension between the front of a cell piece with the back side of another adjacent cell piece,

In two adjacent row's cell pieces, described tinsel reciprocation extension is just being positioned at the cell piece of the end that a arranges Face and a+1 row end a cell piece the back side between, with adjacent two row's cell pieces of connecting.

26. according to the solar module according to any one of claim 23-25, it is characterised in that reciprocation extension exists Tinsel between the adjacent cell sheet of same row is one, and the tinsel that reciprocation extension is between the cell piece of adjacent row is One.

27. according to the solar module according to any one of claim 1-26, it is characterised in that described secondary grid line Width is 40-80 micron, and thickness is 5-20 micron, and described secondary grid line is 50-120 bar, and between adjacent two secondary grid lines Away from for 0.5-3mm.

The preparation method of 28. 1 kinds of solar modules, it is characterised in that including:

In the conductor wire being made up of tinsel is fused to transparent film layer and described tinsel exposes in described transparent film layer, institute State tinsel and include tinsel body and the connecting material layer being applied on described tinsel body；

Upper cover plate, front adhesive film, described transparent film layer, cell piece, back side adhesive film and backboard are sequentially stacked, then Being laminated, to obtain solar module, the secondary grid line of wherein said conductor wire and cell piece is by described connecting material Layer is connected, and the fusing point of described transparent film layer is higher than described front adhesive film and the fusing point of described back side adhesive film.

The preparation method of 29. solar modules according to claim 28, it is characterised in that will before stacked Described tinsel is fused on described transparent film layer.

The preparation method of 30. solar modules according to claim 28, it is characterised in that described conductor wire with Described secondary grid line be connected to stacked before or after or carry out while lamination.

31. according to the preparation method of the solar module according to any one of claim 28-30, it is characterised in that Described connecting material layer is conductive adhesive layer or alloy-layer.

The preparation method of 32. solar modules according to claim 28, it is characterised in that described alloy contains Sn and at least one metal in Bi, Cu, In, Ag, Sb, Pb and Zn.

33. according to the preparation method of the solar module according to any one of claim 28-32, it is characterised in that The thickness of described connecting material layer is 1-100 micron, and described cross-sectional area wiry is 0.01-0.5 square millimeter.

34. according to the preparation method of the solar module according to any one of claim 28-33, it is characterised in that Between surface and the surface of another cell piece of a described tinsel reciprocation extension cell piece in adjacent cell sheet.

35. solar modules according to claim 34, it is characterised in that described tinsel is at one electricity Reciprocation extension between front and the back side of another cell piece described of pond sheet.

36. according to the preparation method of the solar module described in claim 34 or 35, it is characterised in that described in lead Electric wire is formed by a reciprocal coiling of one metal wire.

37. according to the preparation method of the solar module according to any one of claim 33-36, it is characterised in that Described tinsel reciprocation extension 10-60 time.

38. according to the preparation method of the solar module described in claim 37, it is characterised in that described wiry Adjacent two sections form U-shaped structure or v-shaped structure.

39. according to the preparation method of the solar module described in claim 28-38, it is characterised in that stacked Described tinsel is set on described transparent film layer before.

40. according to the preparation method of the solar module according to any one of claim 28-39, it is characterised in that Described transparent film layer is formed by the transparent material that fusing point is more than 160 DEG C.

The preparation method of 41. solar modules according to claim 40, it is characterised in that described transparent film layer Formed by least one in polyethylene terephthalate, polybutylene terephthalate (PBT) and polyimides.

42. according to the preparation method of the solar module according to any one of claim 28-41, it is characterised in that The thickness of described transparent film layer is 50-200 micron, and light transmittance is not less than 90%.