CN106098809B - A kind of preparation method of series-parallel film battery assembly - Google Patents
A kind of preparation method of series-parallel film battery assembly Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000004020 conductor Substances 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000011521 glass Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000010408 film Substances 0.000 claims description 59
- 238000003466 welding Methods 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 15
- 239000010409 thin film Substances 0.000 claims description 9
- 238000010030 laminating Methods 0.000 claims description 8
- 229920005549 butyl rubber Polymers 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 3
- 238000007688 edging Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 claims description 3
- 238000001259 photo etching Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract description 11
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910004613 CdTe Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
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- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
- H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
- H01L31/0463—PV modules composed of a plurality of thin film solar cells deposited on the same substrate characterised by special patterning methods to connect the PV cells in a module, e.g. laser cutting of the conductive or active layers
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0516—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module specially adapted for interconnection of back-contact solar cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1884—Manufacture of transparent electrodes, e.g. TCO, ITO
- H01L31/1888—Manufacture of transparent electrodes, e.g. TCO, ITO methods for etching transparent electrodes
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- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of preparation method of series-parallel film battery assembly, this method is mainly divided into area identical two parts on one piece of TCO electro-conductive glass by laser scoring, respectively series conductor part and parallel conductance part, series conductor part is used for laser grooving and scribing sub-series battery, parallel conductance part is used for laser grooving and scribing sub- battery in parallel, sub-series battery and sub- battery in parallel are connected respectively with drainage strip and busbar, series conductor part and parallel conductance part are connected again, the series-parallel film battery assembly needed for making.The present invention considers the poor shortcoming of membrane uniformity after large-area coating film, with reference to the characteristics of series circuit and parallel circuit, dissolve film layer difference and be connected in series the problem of sub- battery is brought, it is additionally contemplates that the characteristics of being directed to higher voltage in hull cell electrical parameter or higher electric current carries out the optimization of electrical parameter, is easy to influence of the later stage to factors such as inverter type selecting and Power Plant Designs in power station is built.
Description
Technical field
The present invention relates to the technical field of thin-film solar cells, a kind of series-parallel film battery assembly is referred in particular to
Preparation method.
Background technology
Present thin-film solar cells mainly has non-silicon-based hull cell, CIGS thin film solar energy, CdTe film battery etc.,
The material system of hull cell is each variant, but its manufacturing process is essentially identical, basic to use three road laser grooving and scribings into area
The sub- battery of identical, then by plated film formation series circuit, is finally completed the making of cell panel by attaching line box.Specially
One of laser grooving and scribing TCO conducting film, is divided into area identical n (n is positive integer) individual sub- battery, then using PECVD's or PVD
Process plated film, forms PN junction；After second laser grooving and scribing, (second laser is first of laser grooving and scribing of skew, tool
Solid offsetting amount is usually no more than 100 μm according to technological requirement, it is ensured that series circuit is turned on, such as accompanying drawing 1)；Then film production is plated again
By the 3rd road laser grooving and scribing after back electrode film, (the 3rd road laser is skew second laser incising to the sub- battery of formation series connection
Draw, specific offset is usually no more than 100 μm according to technological requirement, it is ensured that series circuit is turned on, such as accompanying drawing 1)；Then use
Battery lead is formed the both positive and negative polarity of battery by drainage strip and busbar, is to install terminal box below to be ready；Through last part technology
(last part technology includes：It is coated with butyl rubber, covering EVA film, laminating machine laminating battery sheet packaging, installation terminal box, testing package)
Complete technique and make the film battery assembly (the sub- battery connected mode such as accompanying drawing 2 of hull cell) being connected in series.
The laser scoring and drainage strip, the welding production of busbar of battery component are so made, technique is relatively easy, technology
Comparative maturity.But for hull cell, plated film film layer area is larger, film layer itself is than relatively thin, an improved-type film layer having
There is 3~5nm, if equipment performance is bad, membrane uniformity is just poor, technique forms sub-series battery in making, and finally gives
The film assembly being connected in series.It is understood that the characteristics of series circuit：(1) circuit connects feature：The whole circuit of series connection is one
Loop, each electrical appliance is sequentially connected, and is not had " branch point "；(2) electrical appliance work characteristics：Each electrical appliance influences each other, one in circuit
Individual electrical appliance does not work, and remaining electrical appliance can not just work.(3) the current work feature of circuit：Electric current has significantly " bucket
Effect ", series circuit current is equal everywhere：IAlways=I1=I2=I3=...=InIf, i.e., the sub- battery of certain in circuit due to
Membrane uniformity is poor or laser scoring is bad, causes open circuit, then its resistance is just substantially bigger than normal to cause electric current to be decreased obviously, and draws
A series of problem is played, such as product yield declines, company cost increase；For the hull cell of large area, some battery components
Voltage is higher, and electric current is relatively low, has plenty of low-voltage, and high current so results in the bad matching inversion when building photovoltaic plant
Device, increases the technical matters such as the difficulty and construction cost of design of photovoltaic power station.(4) series circuit total voltage is equal to voltage everywhere
Sum：UAlways=U1+U2+U3+……+Un；(5) the equivalent resistance of series resistance is equal to each resistance sum：RAlways=R1+R2+R3+……+
Rn。
The content of the invention
It is an object of the invention to the shortcoming and deficiency for overcoming prior art, there is provided a kind of series-parallel film battery assembly
Preparation method, can effectively improve battery component unit for electrical property parameters, otherwise particularly occur voltage it is higher, or electric current is higher
Hull cell electrical parameter；Secondly can effectively solve such membrane uniformity it is poor or certain sub- battery laser groove is bad causes
The film battery assembly of the problem of generated output declines, particularly large-area coating film.
To achieve the above object, technical scheme provided by the present invention is：A kind of system of series-parallel film battery assembly
Preparation Method, comprises the following steps：
1) after rectangular TCO electro-conductive glass edging is cleaned up, it is sent to first of laser equipment and carries out groove, first
Conducting film on TCO electro-conductive glass is divided into area identical two parts by road laser scoring parallel short sides delineation, is respectively
Series conductor part and parallel conductance part, the series conductor part are used for the sub- battery that ensuing laser delineates series connection, the parallel connection
Current-carrying part is used for ensuing laser and delineates sub- battery in parallel, and the laser rays for the conducting film divided equally on TCO electro-conductive glass is defined
For middle bisector；Then, series conductor part and parallel conductance part are respectively depicted into N number of area equation further according to demand
Conductive module, N is positive integer, finally, then carries out laser grooving and scribing to each conductive module so that each conductive module is scored with
The sub- battery block of n+1 area equation, n is positive integer；
2) delineate after first of laser technology, TCO electro-conductive glass is after related coating process, film layer formation thin-film electro
The PN junction in pond, is then delivered to second laser equipment, and second laser first overlaps the middle bisector of first of laser grooving and scribing
Series conductor part and parallel conductance part are separated；If series conductor part and parallel conductance part are in first of laser
N number of conductive module is respectively separated out, then also need second laser to overlap first of laser grooving and scribing, form N number of module separated；
Then, then the sub- battery block of second laser grooving and scribing series conductor part and parallel conductance part is carried out, wherein, in delineation series connection
During the sub- battery block of current-carrying part, second laser is first of laser grooving and scribing of skew, and specific offset is according to technological requirement, no
More than 100 μm, to ensure that series circuit is turned on, and when delineating the sub- battery block of parallel conductance part, it is desirable to second laser
Line must be overlapped with first of laser rays of sub- battery block, to ensure to separate between sub- battery block；
3) delineated after second laser technology, hull cell plating back electrode film is completed after back electrode film making, thin
Film battery technique comes the 3rd road laser equipment and starts to delineate the 3rd road laser, and the same with second laser grooving and scribing, the 3rd road swashs
The middle bisector that light first overlaps second laser grooving and scribing separates series conductor part and parallel conductance part；Equally, such as
Fruit series conductor part and parallel conductance part are respectively separated out N number of conductive module in first of laser, then also need the 3rd road
Laser overlaps second laser grooving and scribing, forms N number of module separated；Then, then the 3rd road laser grooving and scribing series conductor portion is carried out
Divide the sub- battery block with parallel conductance part, wherein, when delineating the sub- battery block of series conductor part, the 3rd road laser is inclined
Second laser grooving and scribing is moved, specific offset is according to technological requirement, no more than 100 μm, to ensure that series circuit is turned on, and carved
When drawing the sub- battery block of parallel conductance part, it is desirable to which the 3rd road laser rays must be overlapped with the second laser rays of sub- battery block,
To ensure to separate between sub- battery block；Complete the laser scoring of sub-series battery and sub- battery in parallel；
4) hull cell is after annealing and testing, sorting, and the technique of hull cell comes ultrasonic bond at ultrasonic welding machine
Drainage strip is connect, the drainage strip of series conductor part is first welded, the parallel sub- welding battery of drainage strip, each conductive module needs two
Drainage strip, the welding position of two drainage strips is located at the inner side for being close to sweep border area domain respectively, and the border area domain of sweeping refers to that TCO is conductive
Glass edge region, usual surrounding sweeps side peak width for 8mm；Then the drainage strip of parallel conductance part is welded again, is drawn
Bar is flowed perpendicular to sub- welding battery, each conductive module needs two drainage strips, the welding positions of two drainage strips is equally point
The inner side for sweeping border area domain Wei Yu be close to；
5) insulating tape is pasted, the insulating tape of series conductor part is first pasted, the insulating tape of series conductor part hangs down
It is straight to be pasted in sub- battery, and each conductive module must be pasted；Then the insulating tape of parallel conductance part is pasted again, and
The insulating tape of connection current-carrying part is pasted parallel to sub- battery, and equally, each conductive module must be pasted；Finally, then glue
Patch connection series conductor part and the insulating tape of parallel conductance part；
6) busbar is pasted, the busbar of series conductor part is first pasted, from conductive module negative pole side drainage strip during stickup
On start to paste on the drainage strip of conductive module positive pole, by that analogy, until has pasted all conductive modules therefore, and remittance
Stream bar must be pasted onto on insulating tape, it is impossible to and the contact of battery film layer, it is to avoid short circuit；Next, then paste parallel conductance part
Busbar, on the drainage strip for pasting conductive module positive pole since on the drainage strip of conductive module negative pole side during stickup, with this
Analogize, until has pasted all conductive modules therefore, and busbar must be pasted onto on insulating tape, it is impossible to battery film layer
Contact, it is to avoid short circuit；, then the conductive module positive pole series conductor part and the conductive module negative pole of parallel conductance part then
Connection is pasted, and busbar must be pasted onto on insulating tape, it is impossible to and the contact of battery film layer, it is to avoid short circuit, finally series connection is led
The conductive module negative pole of electric part and the conductive module positive pole of parallel conductance part are formed as the positive and negative electrode of whole battery component；
7) positive and negative electrode of busbar is the positive and negative electrode of battery, is to install terminal box below to be ready；Through last part technology,
Including：Butyl rubber, covering EVA film, laminating machine laminating battery sheet packaging, installation terminal box, testing package are coated with, that is, completes technique
Make obtained series-parallel film battery assembly.
The present invention compared with prior art, has the following advantages that and beneficial effect：
1st, influence of the reduction membrane effect to electric power generation cell.When large-area coating film, film layer due to device structure and
Technology controlling and process is unstable, and plated film membrane uniformity is poor.If making component using series connection and by the way of being connected in parallel, it can avoid
Or reduce membrane uniformity, so as to reduce the internal resistance of cell, improve electric power generation cell.
2nd, the hot spot effect of battery can be reduced.Because the internal resistance of cell can generate heat in battery component power generation process, temperature liter
Height, this effect is called hot spot effect by we.After so using series connection and being connected in parallel, battery component internal resistance can be reduced, from
And reduce the hot spot effect of battery component, lift the generating efficiency of battery.
3rd, the production cost of reduction manufacturing enterprise and raising product yield.
4th, can effectively reducing " dead band " that laser scoring brings, (" dead band " refers to first of laser scoring to the 3rd road laser incising
Region area between line).Because using after groove by the way of connecting and being connected in parallel, three road laser scorings of parallel connection part are all
It is to overlap, reduces dead zone area, improves the effective area of cell power generation.
5th, optimize the electrical parameter of battery component, be preferably photovoltaic plant construction service.The group that traditional technique makes
Part, otherwise particularly film assembly to show as electric current higher, or voltage is higher, be unfavorable for the type selecting and photovoltaic plant of inverter
Design.Based on series circuit and the characteristics of parallel circuit using series connection and it is in parallel by the way of make component, balance can be optimized electric
Electric current and voltage parameter in the component of pond, are preferably power plant construction service.
Brief description of the drawings
Fig. 1 is the laser scoring schematic diagram being connected in series.
Fig. 2 is Fig. 1 series-connection circuit schematic diagram.
Fig. 3 is the laser scoring schematic diagram being connected in parallel.
Fig. 4 is connected in parallel circuit diagram for Fig. 3's.
Fig. 5 is using series connection and the laser scoring schematic diagram being connected in parallel.
Fig. 6 is Fig. 5 using series connection and is connected in parallel circuit diagram.
Fig. 7 is laser scoring schematic diagram of the invention.
Fig. 8 is the schematic diagram of ultra-sonic welded drainage strip.
Fig. 9 is the schematic diagram for pasting insulating tape.
Figure 10 is the schematic diagram for pasting busbar.
Embodiment
With reference to specific embodiment, the invention will be further described.
The preparation method of series-parallel film battery assembly described in the present embodiment, comprises the following steps：
1) after rectangular TCO electro-conductive glass edging is cleaned up, it is sent to first of laser equipment and carries out groove, first
Conducting film on TCO electro-conductive glass is divided into area identical two by the delineation of road laser scoring (abbreviation P1) parallel short sides
Divide, respectively series conductor part and parallel conductance part, the series conductor part is used for ensuing laser and delineates the sub electric of series connection
Pond (as shown in Figure 1), the parallel conductance part is used for ensuing laser and delineates sub- battery (as shown in Figure 3) in parallel, and puts down
The laser rays of the conducting film divided on TCO electro-conductive glass is defined as middle bisector, i.e., middle separator bar, as shown in Figure 7；Connect
, series conductor part and parallel conductance part are respectively depicted to the conductive module of N number of area equation further according to demand, N is just
Integer, finally, then carries out laser grooving and scribing so that each conductive module is scored with n+1 area equation to each conductive module
Sub- battery block, n is positive integer.
2) delineate after first of laser technology, TCO electro-conductive glass is after related coating process, film layer formation thin-film electro
The PN junction in pond, is then delivered to second laser equipment, and second laser (abbreviation P2) is first overlapped in first of laser grooving and scribing
Between bisector series conductor part and parallel conductance part are separated；If series conductor part and parallel conductance part are
One of laser is respectively separated out N number of conductive module, then also need second laser overlap first of laser grooving and scribing, formed it is N number of every
The module opened；Then, then the sub- battery block of second laser grooving and scribing series conductor part and parallel conductance part is carried out, wherein,
When delineating the sub- battery block of series conductor part, second laser is first of laser grooving and scribing of skew, specific offset according to
Technological requirement, typically not greater than 100 μm, to ensure that series circuit is turned on, and when delineating the sub- battery block of parallel conductance part,
It is required that second laser rays must be overlapped with first of laser rays of sub- battery block, to ensure to separate between sub- battery block.
3) delineated after second laser technology, hull cell plating back electrode film is completed after back electrode film making, thin
Film battery technique comes the 3rd road laser equipment and starts to delineate the 3rd road laser (abbreviation P3), the same with second laser grooving and scribing,
The middle bisector that 3rd road laser first overlaps second laser grooving and scribing separates series conductor part and parallel conductance part；
Equally, if series conductor part and parallel conductance part are respectively separated out N number of conductive module in first of laser, then also need
3rd road laser overlaps second laser grooving and scribing, forms N number of module separated；Then, then the 3rd road laser grooving and scribing series connection is carried out
Current-carrying part and the sub- battery block of parallel conductance part, wherein, when delineating the sub- battery block of series conductor part, the 3rd road swashs
Second laser grooving and scribing is just offset, specific offset is according to technological requirement, typically not greater than 100 μm, to ensure series circuit
Conducting, and when delineating the sub- battery block of parallel conductance part, it is desirable to the second that the 3rd road laser rays must be with sub- battery block
Laser rays is overlapped, to ensure to separate between sub- battery block；The laser scoring for completing sub-series battery and sub- battery in parallel is (such as attached
Shown in Fig. 5).
4) hull cell is after annealing and testing, sorting, and the technique of hull cell comes ultrasonic bond at ultrasonic welding machine
Drainage strip is connect, the drainage strip of series conductor part is first welded, the parallel sub- welding battery of drainage strip, each conductive module needs two
Drainage strip, the welding position of two drainage strips is located at the inner side (as shown in Figure 8) for being close to sweep border area domain respectively, described to sweep border area
Domain refers to TCO electro-conductive glass edge region, and it is 8mm or so that usual surrounding, which sweeps side peak width,；Then parallel connection is welded again to lead
The drainage strip of electric part, drainage strip is perpendicular to sub- welding battery, and each conductive module needs two drainage strips, two drainage strips
Welding position is equally to be located at the inner side for being close to sweep border area domain respectively.
5) insulating tape is pasted, the insulating tape of series conductor part is first pasted, the insulating tape of series conductor part hangs down
It is straight to be pasted in sub- battery, and each conductive module must be pasted；Then the insulating tape of parallel conductance part is pasted again, and
The insulating tape of connection current-carrying part pastes (as shown in Figure 9) parallel to sub- battery, and equally, each conductive module must be pasted
On；Finally, then paste connection series conductor part and parallel conductance part insulating tape.
6) busbar is pasted, the busbar of series conductor part is first pasted, from conductive module negative pole side drainage strip during stickup
On start to paste on the drainage strip of conductive module positive pole, by that analogy, until has pasted all conductive modules therefore, and remittance
Stream bar must be pasted onto on insulating tape, it is impossible to and the contact of battery film layer, it is to avoid short circuit；Next, then paste parallel conductance part
Busbar, on the drainage strip for pasting conductive module positive pole since on the drainage strip of conductive module negative pole side during stickup, with this
Analogize, until has pasted all conductive modules therefore, and busbar must be pasted onto on insulating tape, it is impossible to battery film layer
Contact, it is to avoid short circuit；, then the conductive module positive pole series conductor part and the conductive module negative pole of parallel conductance part then
Connection is pasted, and busbar must be pasted onto on insulating tape, it is impossible to and the contact of battery film layer, it is to avoid short circuit, finally series connection is led
The conductive module negative pole of electric part and the conductive module positive pole of parallel conductance part are formed as the positive and negative electrode of whole battery component
(as shown in Figure 9).
7) positive and negative electrode of busbar is the positive and negative electrode of battery, is to install terminal box below to be ready；Through last part technology,
Including：Butyl rubber, covering EVA film, laminating machine laminating battery sheet packaging, installation terminal box, testing package are coated with, that is, completes technique
Make obtained series-parallel film battery assembly (as shown in Figure 10).
In summary, we use in technique making is designed as a part for son electricity in parallel in same battery component
Pond a, part is sub-series battery, as shown in accompanying drawing 5 and Fig. 6.Contrast is using (such as accompanying drawing 4) in parallel and is connected in series (such as accompanying drawing
2) mode can optimize battery component unit for electrical property parameters, otherwise be not in that voltage is higher, otherwise the higher situation of electric current, passes through
Photovoltaic DC-to-AC converter is selected after optimization design well, reduces the difficulty of design of photovoltaic power station；It can reduce for the sub- battery of parallel connection part
The poor influence to electrical property of membrane uniformity；Parallel connection part can reduce due to the poor caused low-power of membrane uniformity simultaneously
Problem, improves the power and product yield of component；Parallel connection part can also reduce due to " dead band " caused by laser grooving and scribing, improve electricity
The utilization rate of pond generating area.The present invention only has laser grooving and scribing, drainage strip to weld different with traditional handicraft with busbar in fact, its
Remaining technique all same.Not but not it is added to this, moreover it is possible to which solution is connected in series the problem of sub- battery is brought.If hull cell is served as a contrast
Bottom (such as TCO electropanes) area is larger, and glass can be also bisected into after two parts by we, by series conductor part and parallel connection
Current-carrying part is delineated as N number of conductive module respectively, and then N number of module of series conductor part and parallel conductance part is delineated again
There is n (n is positive integer) bar laser rays, obtain n+1 sub- batteries, (ensure that intermodule area is identical when delineation is N number of module,
Then the n+1 sub- cell areas delineated in N number of module are also identical).Then will by busbar below and drainage strip
Parallel conductance part and series conductor part are connected.It is understood that the characteristics of parallel circuit：(1) circuit connects feature：It is in parallel
Circuit is made up of main line and some branch roads, has every branch road of " branch point " each to form loop with main line, there is several branch roads,
Just there are several loops, will not be to whole if the membrane uniformity in some region is poor in plated film or laser scoring causes bad
Individual circuit has a significant effect, IAlways=I1+I2+I3……+In；(2) electrical appliance work characteristics：In parallel circuit, in a branch road
If electrical appliance does not work, the electrical appliance of other branch roads remains to work；(3) parallel circuit resistance feature：1÷RAlways=1 ÷ R1+1÷R2
+…+RnThe inverse of all-in resistance is equal to the sum reciprocal of each branch resistance in parallel circuit；(4) parallel circuit voltage feature：UAlways
=U1=U2=...=Un voltages in parallel circuit are all equal.
Present invention mainly solves thin-film solar cells in manufacturing process uniformity of film it is poor cause transformation efficiency compared with
Low the problem of, while the Improving The Quality of Products on the basis of product cost is not increased, wins the market.Through primary Calculation, product turns
Change efficiency can lift 1%, such as by 100MW/ annual capacities calculate, that every year can many generating 1MW, by 4 yuan/W calculate, 400 can be produced
Ten thousand yuan of profit.
In a word, the present invention has fully taken into account the poor shortcoming of membrane uniformity after large-area coating film, with reference to parallel circuit
And the characteristics of series circuit, dissolved film layer difference and be connected in series the problem of sub- battery is brought；Can also be according to hull cell
Unit for electrical property parameters, the characteristics of higher either voltage or high current sheet are solved by the present invention.Using this manufacturing process, by
It is identical with mode is connected in series in last part technology, therefore there is no difference in cost, it is most important that solve us in production
Unavoidable the problem of, it is with a wide range of applications, is worthy to be popularized.
Embodiment described above is only the preferred embodiments of the invention, and the practical range of the present invention is not limited with this, therefore
The change that all shape, principles according to the present invention are made, all should cover within the scope of the present invention.
Claims (1)
1. a kind of preparation method of series-parallel film battery assembly, it is characterised in that comprise the following steps：
1) after rectangular TCO electro-conductive glass edging is cleaned up, it is sent to first of laser equipment and carries out groove, first sharp
Conducting film on TCO electro-conductive glass is divided into area identical two parts by the delineation of photoetching line parallel short sides, is respectively connected
Current-carrying part and parallel conductance part, the series conductor part are used for the sub- battery that ensuing laser delineates series connection, the parallel conductance
Part is used for ensuing laser and delineates sub- battery in parallel, and during the laser rays for dividing the conducting film on TCO electro-conductive glass equally is defined as
Between bisector；Then, series conductor part and parallel conductance part are respectively depicted to the conduction of N number of area equation further according to demand
Module, N is positive integer, finally, then carries out laser grooving and scribing to each conductive module so that each conductive module is scored with n+1
The sub- battery block of individual area equation, n is positive integer；
2) delineate after first of laser technology, TCO electro-conductive glass is after related coating process, and film layer forms hull cell
PN junction, is then delivered to second laser equipment, and the middle bisector that second laser first overlaps first of laser grooving and scribing will go here and there
Connection current-carrying part and parallel conductance part are separated；If series conductor part and parallel conductance part are each in first of laser
It is separated out N number of conductive module, then also need second laser to overlap first of laser grooving and scribing, forms N number of module separated；Connect
, then carry out the sub- battery block of second laser grooving and scribing series conductor part and parallel conductance part, wherein, led in delineation series connection
During the sub- battery block of electric part, second laser is first of laser grooving and scribing of skew, and specific offset does not surpass according to technological requirement
100 μm are crossed, to ensure that series circuit is turned on, and when delineating the sub- battery block of parallel conductance part, it is desirable to second laser rays
It must be overlapped with first of laser rays of sub- battery block, to ensure to separate between sub- battery block；
3) delineated after second laser technology, hull cell plating back electrode film is completed after back electrode film making, thin-film electro
Pool process comes the 3rd road laser equipment and starts to delineate the 3rd road laser, and the same with second laser grooving and scribing, the 3rd road laser is first
The middle bisector for overlapping second laser grooving and scribing separates series conductor part and parallel conductance part；Equally, if string
Connection current-carrying part and parallel conductance part are respectively separated out N number of conductive module in first of laser, then also need the 3rd road laser
Second laser grooving and scribing is overlapped, N number of module separated is formed；Then, then carry out the 3rd road laser grooving and scribing series conductor part and
The sub- battery block of parallel conductance part, wherein, when delineating the sub- battery block of series conductor part, the 3rd road laser is skew the
Two road laser grooving and scribings, specific offset is according to technological requirement, no more than 100 μm, to ensure that series circuit is turned on, and in delineation simultaneously
When joining the sub- battery block of current-carrying part, it is desirable to which the 3rd road laser rays must be overlapped with the second laser rays of sub- battery block, to protect
Demonstrate,prove and separate between sub- battery block；Complete the laser scoring of sub-series battery and sub- battery in parallel；
4) hull cell is after annealing and testing, sorting, and the technique of hull cell is come ultra-sonic welded at ultrasonic welding machine and drawn
Bar is flowed, the drainage strip of series conductor part is first welded, the parallel sub- welding battery of drainage strip, each conductive module needs two drainages
Bar, the welding position of two drainage strips is located at the inner side for being close to sweep border area domain respectively, and the border area domain of sweeping refers to TCO electro-conductive glass
Edge region, surrounding sweeps side peak width for 8mm；Then the drainage strip of parallel conductance part is welded again, and drainage strip is vertical
In sub- welding battery, each conductive module needs two drainage strips, and the welding position of two drainage strips is equally to be located at respectively tightly
Patch sweeps the inner side in border area domain；
5) paste insulating tape, first paste the insulating tape of series conductor part, the insulating tape of series conductor part perpendicular to
Sub- battery is pasted, and each conductive module must be pasted；Then the insulating tape of parallel conductance part is pasted again, and parallel connection is led
The insulating tape of electric part is pasted parallel to sub- battery, equally, and each conductive module must be pasted；Finally, then company is pasted
Connect the insulating tape of series conductor part and parallel conductance part；
6) busbar is pasted, the busbar of series conductor part is first pasted, is opened during stickup from the drainage strip of conductive module negative pole side
Beginning is pasted on the drainage strip of conductive module positive pole, by that analogy, until having pasted all conductive modules therefore, and busbar
It must be pasted onto on insulating tape, it is impossible to and the contact of battery film layer, it is to avoid short circuit；Next, then paste the remittance of parallel conductance part
Bar is flowed, on the drainage strip for pasting conductive module positive pole since on the drainage strip of conductive module negative pole side during stickup, by that analogy,
Until has pasted all conductive modules therefore, and busbar must be pasted onto on insulating tape, it is impossible to and battery film layer contact,
Avoid short circuit；, then the conductive module positive pole series conductor part and the conductive module negative pole of parallel conductance part are pasted then
Connect, and busbar must be pasted onto on insulating tape, it is impossible to and the contact of battery film layer, it is to avoid short circuit, last series conductor portion
The conductive module negative pole and the conductive module positive pole of parallel conductance part that divide are formed as the positive and negative electrode of whole battery component；
7) positive and negative electrode of busbar is the positive and negative electrode of battery, is to install terminal box below to be ready；Through last part technology, bag
Include：Butyl rubber, covering EVA film, laminating machine laminating battery sheet packaging, installation terminal box, testing package are coated with, that is, completes technique system
Make obtained series-parallel film battery assembly.
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| CN106711284B (en) * | 2016-12-27 | 2018-06-15 | 中山瑞科新能源有限公司 | A kind of cadmium telluride diaphragm solar battery method of manufacturing technology of binodal lamination parallel connection |
| CN106944745A (en) * | 2017-04-22 | 2017-07-14 | 山东拜科通新材料科技有限公司 | A kind of laser processing for processing large format circuit |
| CN108649087B (en) * | 2018-05-09 | 2020-11-13 | 晶澳太阳能有限公司 | Solar cell module and preparation method thereof |
| CN109273545B (en) * | 2018-11-01 | 2020-10-16 | 成都中建材光电材料有限公司 | Manufacturing method of cadmium telluride thin-film solar cell module |
| CN115075443B (en) * | 2022-08-22 | 2022-11-29 | 天津耀皮工程玻璃有限公司 | Large-layout internal-spliced film BIPV building curtain wall power generation glass |
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