CN1295807C - Minitype liquid methanol fuel cell - Google Patents
Minitype liquid methanol fuel cell Download PDFInfo
- Publication number
- CN1295807C CN1295807C CNB2004100437005A CN200410043700A CN1295807C CN 1295807 C CN1295807 C CN 1295807C CN B2004100437005 A CNB2004100437005 A CN B2004100437005A CN 200410043700 A CN200410043700 A CN 200410043700A CN 1295807 C CN1295807 C CN 1295807C
- Authority
- CN
- China
- Prior art keywords
- flow field
- membrane electrode
- bipolar plates
- fuel cell
- bipolar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to a minitype liquid methanol fuel cell which comprises a membrane electrode and bipolar plates, wherein the bipolar plates are positioned at both sides of the membrane electrode; one side of each bipolar plate, which corresponds to the membrane electrode, contains a corresponding flow field of the membrane electrode, and the other side contains a liquid flow guiding channel which is communicated with the flow field; a support point is arranged in the flow field; a metal film which is used as lead wires for collecting electron and the cell electrode is deposited on the flow field; glass seal layers are bonded outside the bipolar plates; the bipolar plates and the membrane electrode are assembled together, and the end parts have seal resin glue. The whole thickness of the cell is less than 3mm. Meanwhile, the bipolar plates processed and made by an MEMS technical skill can effectively finish the structure of the flow field and the collection of electric current, can effectively reduce the volume of the fuel cell and can be convenient for batch processing.
Description
(1) technical field
What the present invention relates to is fuel cell, the minisize liquid methanol fuel cell of specifically a kind of employing micromachined (MEMS) technology processing.
(2) background technology
Methanol fuel cell (DMFC) has its inherent advantage as a kind of minitype portable energy.Higher specific energy and energy conversion efficiency are the interested main causes of people.Gu Ding external structure and the liquid fuel that can fill at any time simultaneously also are user's condition of providing convenience.The primary structure of present fuel cell comprises a membrane electrode and is positioned at the bipolar plates of membrane electrode both sides.Its bipolar plates adopts graphite material to make, and is not suitable for the micro fuel cell that processing and fabricating is used for portable energy source.For example, the processing of graphite flow field structure can be subjected to the fragility of graphite and the restriction of mould.And its sealing problem also is difficult to solve.
(3) summary of the invention
The purpose of this invention is to provide and to adopt micromachined (MEMS) processes, be convenient to make the minisize liquid methanol fuel cell of dependable performance in batches.
The object of the present invention is achieved like this: comprise a membrane electrode and the bipolar plates that is positioned at the membrane electrode both sides, bipolar plates with the corresponding side of membrane electrode on contain with the corresponding flow field of membrane electrode, opposite side on contain the liquid guide flow passage that communicates with the flow field, be provided with the strong point in the flow field, be deposited with on the flow field as the metallic film of collecting electronics and battery electrode lead-out wire, the outer bonding of bipolar plates has glass seal layer, bipolar plates and mea are fitted together, and there is sealing resin glue its end.
The present invention can also comprise some architectural features like this:
1, described bipolar plate material is silicon-based semiconductor material＜100 〉.
2, the strong point in the described flow field is the point type distribution.
3, the strong point in the described flow field is snakelike distribution.
Micromachined (MEMS) technology is used technology such as photoetching, corrosion and chemical vapor deposition, on the micro-structural of making micro-system in batches remarkable advantages is arranged.Compare with traditional handicraft, be more suitable for being used for processing microbattery configurations.The present invention is by the selection of plate material, and the design of battery structure and hermetically-sealed construction etc. make the minisize liquid methanol fuel cell can adopt micromachined technology to process.Battery uses methanol aqueous solution to act as a fuel, and oxygen is supplied with by atmosphere, natural heat dissipation.The integral thickness of this kind battery is less than 3mm.Simultaneously, by the bipolar plates of semiconductor process techniques and MEMS technology processing and fabricating, can effectively finish structure of flow field and electric current collection, and can effectively dwindle volume of fuel cell.Its major advantage can be summed up as:
1, be convenient to batch machining, technological process is simple, low cost of manufacture;
2, be easy to design the planar array of minisize liquid methanol fuel cell;
3, can increase the structural strength of battery, littleization liquid methanol fuel battery, and keep its performance.
Since the distinctive electrochemical reaction of battery, its single pond output voltage limited (DMFC is less than 1.2V).Can adopt a plurality of monocells to be together in series as required to obtain higher output voltage.Its cascaded structure can use the FLIP-FLOP structure, guarantees the integrality of proton exchange membrane, has the output of the less internal resistance of cell and one-sided power.Certainly as required, also can on the basis of monocell of the present invention, carry out the parallel connection combination.
(4) description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a multiple spot type monocell bipolar plate flow field structural representation;
Fig. 3 is the rearview of Fig. 2;
Fig. 4 is the vertical view of Fig. 2;
Fig. 5 is the positive flow field reticle schematic diagram of snakelike monocell bipolar plates;
Fig. 6 is snakelike monocell bipolar plate flow field structural representation;
Fig. 7 is the rearview of Fig. 6;
Fig. 8 is the vertical view of Fig. 6;
Fig. 9 is a multiple spot type batteries in parallel connection bipolar plate flow field structural representation;
(5) specific embodiments
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1,2,3 and 4, the composition of first kind of embodiment of the present invention comprises a membrane electrode 11 and is positioned at the bipolar plates 12,13 of membrane electrode both sides.Contain on the corresponding side of bipolar plates and membrane electrode with the corresponding flow field 4 of membrane electrode, opposite side on contain liquid guide flow passage 6.Communicate by liquid inlet and outlet hole 3 between liquid guide flow passage and the flow field.Be provided with the strong point 5 in the flow field, the strong point is point type and distributes, and is even well-regulated distribution.Be deposited with on the flow field as the metallic film 1 of collecting electronics and battery electrode lead-out wire.The outer bonding of bipolar plates has glass seal layer 2.Bipolar plates and mea are fitted together, and its periphery has sealing resin glue 14.Bipolar plate material is silicon-based semiconductor material＜100 〉.Membrane electrode is the MEA film that both sides have Catalytic Layer 15,16.
In conjunction with Fig. 5,6,7 and 8, second kind of embodiment of the present invention is that the strong point in the flow field is designed to be snakelike distribution.Other structures are identical with first kind of embodiment.
In conjunction with Fig. 9, the present invention can implement the parallel-connection structure of battery.Its cascaded structure has two kinds of embodiments: one is to use the FLIP-FLOP structure, guarantees the integrality of proton exchange membrane, has the output of the less internal resistance of cell and one-sided power.The 2nd, monocell or Fig. 5 parallel battery are carried out the outside be connected in series.
Claims (1)
1, a kind of minisize liquid methanol fuel cell, comprise a membrane electrode and the bipolar plates that is positioned at the membrane electrode both sides, contain and the corresponding flow field of membrane electrode on the corresponding side of bipolar plates and membrane electrode, contain the liquid guide flow passage that communicates with the flow field on the opposite side, be provided with the strong point in the flow field, be deposited with on the flow field as the metallic film of collecting electronics and battery electrode lead-out wire, it is characterized in that: the outer bonding of bipolar plates has glass seal layer, bipolar plates and mea are fitted together, there is sealing resin glue its end, and described bipolar plate material is silicon-based semiconductor material＜100 〉.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100437005A CN1295807C (en) | 2004-07-12 | 2004-07-12 | Minitype liquid methanol fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100437005A CN1295807C (en) | 2004-07-12 | 2004-07-12 | Minitype liquid methanol fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1595702A CN1595702A (en) | 2005-03-16 |
| CN1295807C true CN1295807C (en) | 2007-01-17 |
Family
ID=34665398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100437005A Expired - Fee Related CN1295807C (en) | 2004-07-12 | 2004-07-12 | Minitype liquid methanol fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1295807C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200743246A (en) * | 2006-05-15 | 2007-11-16 | Antig Tech Co Ltd | Laminated fuel cell |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5756145A (en) * | 1995-11-08 | 1998-05-26 | Baylor College Of Medicine | Durable, Resilient and effective antimicrobial coating for medical devices and method of coating therefor |
-
2004
- 2004-07-12 CN CNB2004100437005A patent/CN1295807C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5756145A (en) * | 1995-11-08 | 1998-05-26 | Baylor College Of Medicine | Durable, Resilient and effective antimicrobial coating for medical devices and method of coating therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1595702A (en) | 2005-03-16 |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |