CN101304094B - Fuel cell polar plate and fuel cell using the same - Google Patents
Fuel cell polar plate and fuel cell using the same Download PDFInfo
- Publication number
- CN101304094B CN101304094B CN2007100743216A CN200710074321A CN101304094B CN 101304094 B CN101304094 B CN 101304094B CN 2007100743216 A CN2007100743216 A CN 2007100743216A CN 200710074321 A CN200710074321 A CN 200710074321A CN 101304094 B CN101304094 B CN 101304094B
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- China
- Prior art keywords
- air inlet
- runner
- flow channel
- fuel cell
- pole plate
- 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.)
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- 239000000446 fuel Substances 0.000 title claims abstract description 45
- 238000009792 diffusion process Methods 0.000 claims abstract description 42
- 238000005452 bending Methods 0.000 claims description 5
- 238000010943 off-gassing Methods 0.000 abstract 4
- 239000007789 gas Substances 0.000 description 32
- 238000003487 electrochemical reaction Methods 0.000 description 15
- 239000012528 membrane Substances 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 241000276425 Xiphophorus maculatus Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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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
Landscapes
- Fuel Cell (AREA)
Abstract
The invention discloses a polar plate of a fuel cell, wherein, one surface of the polar plate is provided with a channel, the channel comprises two groups of intake channels and one group of outgassing channels, the two groups of intake channels are respectively positioned at the two sides of the outgassing channel, a separator is arranged between the each group of intake channels and the outgassing channel, and the separator separates the intake channel from the outgassing channel so as to impel gas to enter a gas diffusion layer adjacent to the separator in a compulsory convective way. The arrangement of the two groups of intake channels and the separator can effectively reinforce the compulsory convective diffusion effect of flows in the channel of the polar plate, can carry away surplus moisture accumulated in the gas diffusion layer, and can increase the generation efficiency of the fuel cell.
Description
Technical field
The present invention relates to a kind of fuel battery pole board, particularly the pole plate of a proton exchanging film fuel battery and use the fuel cell of this pole plate.
Background technology
In recent years, fuel cell technology has had many important breakthroughs, wherein (Proton Exchange Membrane Fuel Cell PEMFC) receives sizable concern to Proton Exchange Membrane Fuel Cells, and countries in the world government and business circles drop into sizable research and development energy invariably.
Proton Exchange Membrane Fuel Cells is pollution-free except having, and outside the advantage of the high general fuel cell of energy conversion efficiency, more possesses near normal-temperature operation and activates characteristic rapidly, is particularly suitable for transportation power, portable power and household.
The key component that constitutes fuel cell comprises electrode (electrode), proton exchange membrane (electrolytemembrane) and pole plate (bipolarplate) etc.And pole plate has air inlet water conservancy diversion and two major functions of collected current.The main purpose of the runner of the different shape of being processed on pole plate provides the runner of reaction gas flow and product turnover fuel cell.So under the supply of certain reaction gas, how can make electrode all can fully obtain reacting gas everywhere, its key is the design of runner.
Figure 5 shows that a kind of vertical view of existing fuel battery pole board.This pole plate 50 is a cuboid platy structure, and this pole plate 50 is provided with an air inlet runner 52, and goes out flow channel 54 and some diffusion runners 56.These spread between runners 56 by some wallboards that are arranged in parallel 51 intervals.One end of these diffusion runners 56 is communicated with this air inlet runner 52, and the other end goes out flow channel 54 with this and is communicated with.During use, air-flow 60 spreads mobile through diffusion runner 56 from air inlet runner 52, participates in the electrochemical reaction of fuel battery inside in the diffusion process of flowing, has neither part nor lot in the residual gas of reaction and the product of reaction and then is passed to out flow channel 54 discharges.Wherein, air-flow 60 mainly enters porous gas diffusion layers (figure does not show) generation electrochemical reaction by diffusion effect.
Yet, air-flow 60 at this air inlet runner 52, go out flow channel 54 and flow basic the be Laminar Flow of diffusion in the runner 56, be difficult to enter gas diffusion layers participation electrochemical reaction fully by diffusion effect, make that the generating efficiency of fuel cell is not high.In addition, the too much moisture that electrochemical reaction produces can not in time emit by going out flow channel 54, and the hole in the gas diffusion layers will be assembled and stop up to these too much moisture, influences the transmission of gas, thereby further hinder the carrying out of electrochemical reaction.
Summary of the invention
In view of this, be necessary to provide a kind of have strengthen the gaseous diffusion effect, prevent the fuel battery pole board that excess moisture is assembled and use the fuel cell of this pole plate in gas diffusion layers.
A kind of fuel battery pole board, a wherein surface of this pole plate is provided with runner, described runner comprises that two groups of air inlet runners and one group go out flow channel, these two groups of air inlet runners lay respectively at this and go out the flow channel both sides, described each group air inlet runner and this go out to be provided with dividing plate between the flow channel, described dividing plate with air inlet runner with go out flow channel and separate, the air inlet of described two groups of air inlet runners lays respectively at the place, diagonal angle of this pole plate.
A kind of fuel cell, comprise at least one pole plate and the gas diffusion layers adjacent with described pole plate, this pole plate is provided with runner in the surface of abutting gas diffusion layer, described runner comprises that two groups of air inlet runners and one group go out flow channel, these two groups of air inlet runners lay respectively at this and go out the flow channel both sides, described each group air inlet runner and this go out to be provided with the dividing plate that is snakelike bending between the flow channel, and the air inlet of described two groups of air inlet runners lays respectively at the place, diagonal angle of this pole plate.
Compared with prior art, this fuel cell forces the air-flow on the pole plate to enter gas diffusion layers in the forced convertion mode by described air inlet runner, the setting that goes out flow channel and dividing plate, increases the speed of electrochemical reaction.Simultaneously, the powerful shear stress that this forced convertion effect produces also can be taken away the too much moisture that electrochemical reaction produces in the gas diffusion layers, improves the generating efficiency of fuel cell.
Description of drawings
Be further described in conjunction with the embodiments with reference to the accompanying drawings:
Fig. 1 is the structural representation of fuel cell first embodiment of the present invention.
Fig. 2 is the stereogram of pole plate in the fuel cell shown in Figure 1.
Fig. 3 is the vertical view of pole plate in the fuel cell shown in Figure 1.
Fig. 4 is the vertical view of pole plate second embodiment in the fuel cell of the present invention.
Fig. 5 is the vertical view of pole plate in the existing fuel cell.
Embodiment
Figure 1 shows that the wherein structural representation of an embodiment of fuel cell of the present invention.This fuel cell 100 comprises a bottom crown 10, a mea 20 and a top crown 30, and this mea 20 is located between this bottom crown 10 and this top crown 30.This mea 20 comprises a proton exchange membrane 21, two catalyst layers 22,23 and two gas diffusion layers 24,25, and this two catalyst layer 22,23 is located in respectively between this proton exchange membrane 21 and this two gas diffusion layers 24,25.This top crown 30 mainly plays air guide, conduction and water guide with this bottom crown 10 in fuel cell 100.This two gas diffusion layers 24,25 is made by porous material.The gas (as hydrogen or air) that is entered by top crown 30 and bottom crown 10 enters this two gas diffusion layers 24,25 and this two catalyst layer 22,23 by diffusion, participates in the electrochemical reaction of this fuel cell 100 respectively.This bottom crown 10 and top crown 30 can be made by conducting metal, for example the copper metal; Also can make, for example graphite by electrically conductive, non-metallic.
Please refer to Fig. 1 to Fig. 3, this bottom crown 10 is a cuboid platy structure, which is provided with two groups of air inlet runners and goes out a flow channel 16 for 12,14 and.This goes out the central authorities that flow channel 16 is positioned at this bottom crown 10, and this two air inlet runner 12,14 lays respectively at the both sides that this goes out flow channel 16.This two air inlet runner 12,14 and this go out to be respectively equipped with a dividing plate 11 between the flow channel 16, and this two dividing plate 11 is respectively with air inlet runner 12,14 and go out flow channel 16 and separate.This two dividing plate 11 is snakelike bending structure (as shown in Figures 2 and 3).Each dividing plate 11 forms a stop section 112 in each bending place, this stop section 112 is a plate-like structure.The air inlet 121,141 of this two air inlet runner 12,14 is positioned at the same side of this bottom crown 10.This goes out flow channel 16 and is provided with a gas outlet 161, and this gas outlet 161 is positioned at the opposite side relative with air inlet 121,141.Flow passage structure on this top crown 30 is identical with this bottom crown 10.
Please refer to Fig. 1 and Fig. 3, during use, for bottom crown 10, air-flow 40 (such as hydrogen or air) enters the air inlet runner 12,14 of this bottom crown 10 respectively by air inlet 121,141.When air-flow 40 during in the upstream, it mainly enters the electrochemical reaction that gas diffusion layers 25 participates in the fuel cells 100 by diffusion effect.When air-flow 40 flow to 112 places, stop section, it was intercepted by stop section 112, and this stop section 112 forces air-flow 40 to enter gas diffusion layers 25 in the forced convertion mode.The air-flow 40 that enters gas diffusion layers 25 can be sought shortest path and cross dividing plate 11 and enter out in the flow channel 16, so just produce a forced convertion effect.This forced convertion effect can make more air-flow 40 enter gas diffusion layers 25, increases the speed of electrochemical reaction, improves the generating efficiency of this fuel cell 100.Simultaneously, this forced convertion effect can produce powerful shear stress to take away the too much moisture that electrochemical reaction produces in the gas diffusion layers 25.In addition, in the time of in air-flow 40 enters out flow channel 16, go out flow channel 16 and still can continue as air-flow 40 diffusion effect is provided, leave bottom crown 10 by gas outlet 161, make air-flow 40 can enter gas diffusion layers 25 more equably until air-flow 40.
Please refer to Fig. 4, it is depicted as the vertical view of second embodiment of the invention, and the difference of itself and first embodiment is that air inlet 121, the 141a of this two air inlet runner 12,14 lays respectively at the place, diagonal angle of this bottom crown 10a.Because the flow velocity of air inlet 121,141a place air-flow 40 is higher, corresponding diffusion effect, forced convertion effect are also stronger, by place, diagonal angle with air inlet 121,141a setting and this bottom crown 10a, can be more even so that enter the distribution of air-flow 40 of gas diffusion layers 25, improve the speed of electrochemical reaction in the fuel cell 100, and then improve whole generating efficiency.
In sum,, the air-flow in advancing 40 is produced barrier effects by the setting of this dividing plate 11, make air-flow 40 at air inlet runner 12,14 with go out between the flow channel 16 to enter gas diffusion layers 25 in the forced convertion mode, generation forced convertion effect.This forced convertion effect can make more air-flow 40 enter gas diffusion layers 25, and produces powerful shear stress to take away the too much moisture that electrochemical reaction produces in the gas diffusion layers 25.
Be positioned at the setting that flow channel 16 of central authorities by this two air inlet runner 12,14 and this, for the design of the single air inlet runner of tradition, can make more air-flow 40 enter gas diffusion layers 25 through forced convertion.Because the air-flow 40 at air inlet 121,141 places than being easier to enter gas diffusion layers 25, so traditional single air inlet runner is compared in the design of air inlet runner 12,14, can making air-flow 40 enter gas diffusion layers 25 in more uniform mode and participate in electrochemical reaction.
In addition, go out the design of flow channel 16 by this two air inlet runner 12,14 and this, prior art effectively shortens the flow path of charge air flow 40 relatively, reduces the shielding action of boundary-layer effectively, thereby the raising electrochemical reaction rates, the generating efficiency of raising fuel cell.
Claims (6)
1. fuel battery pole board, a wherein surface of this pole plate is provided with runner, it is characterized in that, described runner comprises that two groups of air inlet runners and one group go out flow channel, these two groups of air inlet runners lay respectively at this and go out the flow channel both sides, described each group air inlet runner goes out to be provided with dividing plate between the flow channel with this, and described dividing plate is with air inlet runner and go out flow channel and separate, and the air inlet of described two groups of air inlet runners lays respectively at the place, diagonal angle of this pole plate.
2. fuel battery pole board according to claim 1 is characterized in that described dividing plate is snakelike bending structure.
3. fuel battery pole board according to claim 1 is characterized in that, this goes out flow channel and is positioned at this pole plate central authorities, and these two groups of air inlet runners lay respectively at the both sides of this pole plate.
4. fuel battery pole board according to claim 1 is characterized in that, this pole plate also is provided with the above-mentioned runner of same configuration on another surface relatively, thereby constitutes bipolar plates.
5. fuel cell, comprise at least one pole plate and the gas diffusion layers adjacent with described pole plate, this pole plate is provided with runner in the surface of abutting gas diffusion layer, it is characterized in that, described runner comprises that two groups of air inlet runners and one group go out flow channel, these two groups of air inlet runners lay respectively at this and go out the flow channel both sides, and described each group air inlet runner and this go out to be provided with the dividing plate that is snakelike bending between the flow channel, and the air inlet of described two groups of air inlet runners lays respectively at the place, diagonal angle of this pole plate.
6. fuel cell according to claim 5 is characterized in that, also is provided with the above-mentioned runner of same configuration on relative another surface of this pole plate, thereby constitutes bipolar plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100743216A CN101304094B (en) | 2007-05-09 | 2007-05-09 | Fuel cell polar plate and fuel cell using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100743216A CN101304094B (en) | 2007-05-09 | 2007-05-09 | Fuel cell polar plate and fuel cell using the same |
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| Publication Number | Publication Date |
|---|---|
| CN101304094A CN101304094A (en) | 2008-11-12 |
| CN101304094B true CN101304094B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100743216A Expired - Fee Related CN101304094B (en) | 2007-05-09 | 2007-05-09 | Fuel cell polar plate and fuel cell using the same |
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| Country | Link |
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| CN (1) | CN101304094B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375047B (en) * | 2015-11-27 | 2018-04-10 | 苏州华清京昆新能源科技有限公司 | A kind of new SOFC connectors and air flue setting structure |
| KR102483895B1 (en) * | 2016-01-21 | 2022-12-30 | 삼성전자주식회사 | Electrochemical cell, battery module comprising the same, and battery pack comprising the same |
| CN108134124B (en) * | 2018-01-11 | 2019-03-29 | 中国矿业大学 | A kind of flat-plate-type solid-oxide fuel battery connector and battery pile |
| CN108767288B (en) * | 2018-06-11 | 2020-11-10 | 西安交通大学 | A variable-section tree-shaped fuel cell flow channel structure |
| CN108767372A (en) * | 2018-08-27 | 2018-11-06 | 华霆（合肥）动力技术有限公司 | Battery thermal management system, accumulator and automobile |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1521879A (en) * | 2003-02-15 | 2004-08-18 | �ն������������豸��˾ | Interconnects, fuel cells and fuel cell stacks |
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- 2007-05-09 CN CN2007100743216A patent/CN101304094B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1521879A (en) * | 2003-02-15 | 2004-08-18 | �ն������������豸��˾ | Interconnects, fuel cells and fuel cell stacks |
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| Publication number | Publication date |
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| CN101304094A (en) | 2008-11-12 |
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Granted publication date: 20100929 Termination date: 20110509 |