CN202084601U - Proton exchange membrane fuel cell flow field structure - Google Patents
Proton exchange membrane fuel cell flow field structure Download PDFInfo
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- CN202084601U CN202084601U CN2011201206639U CN201120120663U CN202084601U CN 202084601 U CN202084601 U CN 202084601U CN 2011201206639 U CN2011201206639 U CN 2011201206639U CN 201120120663 U CN201120120663 U CN 201120120663U CN 202084601 U CN202084601 U CN 202084601U
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- flow
- flow field
- runner
- serpentine
- fuel cell
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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
-
- 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
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Abstract
The utility model relates to a fuel cell flow field structure, in particular to a proton exchange membrane fuel cell flow field structure comprising cross-finger-shaped flow field flow channels and serpentine flow field flow channels, wherein same sides of flow field plates are provided with a plurality of flow channels consisting of the cross-finger-shaped flow field flow channels and the serpentine flow field flow channels, a flow channel air inlet is arranged at an adapting position of one end of each cross-finger-shaped flow field flow channel, a flow channel air outlet is arranged at the adapting position of one end of each serpentine flow field flow channel, and the cross-finger-shaped flow field flow channels and the serpentine flow field flow channels are connected with each other through connecting flow channels. The flow field flow channels are rapid in water drainage, flow channel blocking and short circuit or channeling phenomenon are not easy to occur, and the battery performance is more excellent due to even distribution of current density. The proton exchange membrane fuel cell flow field structure is simple and reasonable in structure and low in manufacturing cost, and has wide social benefit and market prospect.
Description
Technical field
The utility model relates to a kind of fuel cell flow field structure, relates in particular to a proton exchanging film fuel battery flow field structure, belongs to the fuel cell technology field.
Background technology
Fuel cell is a kind ofly can be converted into the electrochemical appliance of electric energy by electrochemical reaction with being stored in chemical energy in the fuel.It is not subjected to the restriction of Carnot cycle without the overheated machine process, energy conversion efficiency height (40～60%); Environment is not had influence, discharge nitride and sulfide hardly; Emission amount of carbon dioxide is low, reduces more than 40% than the power plant.In addition, it also has, and noise is low, and startup is fast, does not have corrosion, prepares the advantage of easy and long service life.Because have these outstanding advantages, countries in the world government and large enterprise have dropped into great amount of manpower and material resources are researched and developed fuel cell technology.
Proton Exchange Membrane Fuel Cells is to belong to low-temperature fuel cell, working temperature is generally at 40～80 ℃, operation principle is: hydrogen and oxygen arrive the anode and the negative electrode of battery respectively by the air guide channel on the bipolar plates, reacting gas arrives proton exchange membrane by the diffusion layer on the electrode, anode one side at film, hydrogen is dissociated into hydrogen ion (proton) and electronegative electronics under the effect of anode catalyst, hydrogen ion is with proton hydrate H
+(xH
2O) form shifts in proton exchange membrane, arrives negative electrode at last, realizes proton conductive.This transfer of proton causes anode electronegative electron accumulation to occur, thereby becomes an electronegative terminal (negative pole).Meanwhile, the oxygen molecule of negative electrode and catalyst excite the electronics of generation to react, become oxonium ion, make negative electrode become the terminal of positively charged (positive pole), its result has produced a voltage between the positively charged terminal of the electronegative terminal of anode and negative electrode.If link to each other the two poles of the earth by external circuit this moment, electronics will flow to negative electrode from anode by the loop, thereby produces electric energy.Simultaneously, hydrogen ion and the cation generation water that reacts.Electrode reaction is:
Anode (negative pole): H
2→ 2H
++ 2e
-
Negative electrode (positive pole): 1/2O
2+ 2H
++ 2e
-→ H
2O
Cell reaction: H
2+ 1/2O
2→ H
2O
Fuel cell is made up of a plurality of Proton Exchange Membrane Fuel Cells monomers, and the core of Proton Exchange Membrane Fuel Cells is membrane electrode and bipolar plates.Bipolar plates provides the jog of gas distribution and collected current, and negative area is the flow field, and the flow field is the chief component of bipolar plates.The flow field mainly is divided into following several types: point-like, netted, porous body, parallel, snakelike, interdigitated and new shape flow field.The point-like flow field structure is simple, is specially adapted to pure hydrogen, pure oxygen, the fuel cell of steam state draining.To the Proton Exchange Membrane Fuel Cells of mainly discharging,, be unfavorable for discharging aqueous water because reaction gas flow is difficult to reach very high linear speed through this flow field with aqueous water.Mesh flow field is a kind of way of abandoning runner, because the rate of flow of fluid in this runner is lower, so drainability is relatively poor, but moisture-retaining capacity is stronger relatively, the fluid flow uniformity is not ideal enough, flowing of line zone is fast importing and exporting, and delay is often arranged on the corner, is prone to problems such as concentration polarization or water logging.The outstanding advantage of porous body runner is that it is low to the electrode diffusion layer requirement of strength, and when reaction gas when this flow field, easily form local turbulence and help the mass transfer of diffusion layer, reduce concentration polarization.Parallel flow field has the little advantage of flow resistance, this can reduce the pressure loss to a certain extent, improve the whole efficiency of battery, yet the minute differences of gas flow and response situation can cause disturbance to the overall performance of battery in each runner, occurs the situation of unstable properties easily.Serpentine flow is a kind of runner form that early proposes, its outstanding advantage is to get rid of the aqueous water of generation rapidly, be not prone to the situation in choked flow road, yet for the bigger flow-field plate of area, serpentine flow path can cause the reaction gas pressure drop big and electric current distribution is inhomogeneous because of runner is long.The design of interdigitated flow field can make reactant more fully by runner, and has good drainability, still, because the resistance of diffusion layer is bigger, can make the pressure in flow field fall increase simultaneously, and is short-circuited easily or the situation of channel.
The utility model content
In order to address the above problem, the flow field runner that the utility model provides a kind of draining rapidly, not to be prone to choked flow road and short circuit or channeling reduces concentration polarization, and it is good to reach battery performance, electric current distribution is even, and the low proton exchanging film fuel battery flow field structure of cost.
The technical scheme of the utility model technical solution problem is to achieve these goals:
One proton exchanging film fuel battery flow field structure comprises interdigitated flow field runner and serpentine flow runner, is provided with some the runners of being made up of interdigitated flow field runner and serpentine flow runner in the same side of flow-field plate; The adapting position of interdigitated flow field runner one end is provided with the runner air admission hole; The adapting position of serpentine flow runner one end is provided with the runner venthole, and described interdigitated flow field runner is connected by being connected runner with the serpentine flow runner.
Described interdigitated flow field runner and serpentine flow runner respectively account for 50% of flow field effective area.
Described connection runner, its end are the outlet of gas at the interdigitated flow field runner, also are the inlet of gas at the serpentine flow runner simultaneously.
The utility model compared with prior art has following advantage and effect:
1, the utility model adopts the interdigitated flow field runner at the air inlet nose end.Help gas because forced convertion by runner, significantly improves transmission speed, reduce concentration polarization.
2, the utility model adopts the serpentine flow runner in the flow field near the gas outlet end, has avoided the bigger shortcoming of resistance of interdigitated flow field runner diffusion layer, effectively avoids the damage of electrode.The serpentine flow runner can be discharged the water that reaction generates rapidly simultaneously, does not block runner, has effectively prevented the water logging phenomenon.
3, the utility model coupling part between interdigitated flow field runner and serpentine flow runner is adopted and is connected runner, and the end that connects runner is the outlet of interdigitated runner gas, also is the inlet of serpentine flow path gas simultaneously.
4, the utility model is simple and reasonable for structure, confirm that through repetition test and production effect is remarkable, and structural design is easy to processing, cheap, improve fuel battery performance greatly, electric current distribution is even, has social benefit and market prospects widely.
The utility model by test obtain Fig. 5 for Proton Exchange Membrane Fuel Cells at the utility model flow field and normal flow battery performance comparison diagram after the match, effectively proved and the utility model has the advantages of, concrete experimental condition is fuel battery temperature 343K, fuel battery negative pole humidification temperature 348K, anode humidification temperature 348K, back pressure 0.1MPa, hydrogen charge flow rate are 100ml/min, and the air inlet flow is 250ml/min.Between fuel battery voltage is by 0.25V-0.9V, test one group of data, record current density value, rendering performance curve every 0.05V.6 is the interdigitated flow field fuel cell performance curve among the figure, and 7 is serpentine flow fuel cell performance curve figure, and 8 is the utility model flow field fuel cell performance curve.Therefore can draw: under identical voltage conditions, the utility model current density increases, and electric current distribution is even, the more excellent performance of battery.
Description of drawings
Fig. 1 is the structural representation of a kind of execution mode of the utility model;
Fig. 2 is the A-A sectional structure schematic diagram of the utility model Fig. 1;
Fig. 3 is the structural representation of the another kind of execution mode of the utility model;
Fig. 4 is the B-B sectional structure schematic diagram of the utility model Fig. 3;
Fig. 5 is a Proton Exchange Membrane Fuel Cells at the utility model flow field and normal flow battery performance comparison diagram after the match.
Among the figure: air admission hole 1, interdigitated flow field runner 2 connects runner 3, serpentine flow runner 4, venthole 5, interdigitated flow field fuel cell performance curve 6, serpentine flow fuel cell performance curve 7, the utility model flow field fuel cell performance curve 8.
Embodiment
Below in conjunction with specific embodiment the utility model is further elaborated, but protection range of the present utility model is not limited by specific embodiment, is as the criterion with claims.In addition, with under the prerequisite of technical solutions of the utility model, any change or change that those of ordinary skills that the utility model is done realize easily all will fall within the claim scope of the present utility model.
The Proton Exchange Membrane Fuel Cells flow field structure of a kind of execution mode of the utility model as shown in Figure 1 and Figure 2 comprises interdigitated flow field runner 2 and serpentine flow runner 4, and flow-field plate adopts graphite cake, and every width of flow path is 1mm, and the width of ridge is 1mm.Effective area is established 21 runners altogether in the flow field, the same side of flow-field plate, and this runner is made up of interdigitated flow field runner 2 and serpentine flow runner 4; And interdigitated flow field runner 2 and serpentine flow runner 4 respectively account for 50% of flow field effective area, are provided with runner air admission hole 1 at article one runner of interdigitated flow field runner 2 one ends; The last item runner of serpentine flow runner 4 one ends is provided with runner venthole 5, described interdigitated flow field runner 2 is connected by being connected runner 3 with serpentine flow runner 4, the end that connects runner 3 is the outlet of gas at interdigitated flow field runner 2, also is the inlet of gas at serpentine flow runner 4 simultaneously.
The Proton Exchange Membrane Fuel Cells flow field structure of the another kind of execution mode of as shown in Figure 3, Figure 4 the utility model is provided with runner air admission hole 1 at the second runner of interdigitated flow field runner 2 one ends; Other repeats no more with embodiment 1.
Claims (3)
1. a proton exchanging film fuel battery flow field structure, comprise interdigitated flow field runner (2) and serpentine flow runner (4), it is characterized in that: be provided with some the runners of forming by interdigitated flow field runner (2) and serpentine flow runner (4) in the same side of flow-field plate; Interdigitated flow field runner (2) one end adapting positions are provided with runner air admission hole (1); Serpentine flow runner (4) one end adapting positions are provided with runner venthole (5), and described interdigitated flow field runner (2) is connected by being connected runner (3) with serpentine flow runner (4).
2. a proton exchanging film fuel battery flow field structure according to claim 1 is characterized in that: described interdigitated flow field runner (2) and serpentine flow runner (4) respectively account for 50% of flow field effective area.
3. a proton exchanging film fuel battery flow field structure according to claim 1 and 2, it is characterized in that: described connection runner (3), its end is the outlet of gas in interdigitated flow field runner (2), also is the inlet of gas in serpentine flow runner (4) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201206639U CN202084601U (en) | 2011-04-22 | 2011-04-22 | Proton exchange membrane fuel cell flow field structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201206639U CN202084601U (en) | 2011-04-22 | 2011-04-22 | Proton exchange membrane fuel cell flow field structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202084601U true CN202084601U (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201206639U Expired - Fee Related CN202084601U (en) | 2011-04-22 | 2011-04-22 | Proton exchange membrane fuel cell flow field structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201583A (en) * | 2011-04-22 | 2011-09-28 | 沈阳建筑大学 | Proton exchange membrane fuel cell flow field structure |
| CN104347888A (en) * | 2014-10-15 | 2015-02-11 | 北京氢璞创能科技有限公司 | Water cooled proton exchange membrane fuel cell stack and water cooled proton exchange membrane fuel cell |
| CN104833925A (en) * | 2015-05-07 | 2015-08-12 | 昆山弗尔赛能源有限公司 | Fuel cell bipolar plate detection method and system based on machine vision |
-
2011
- 2011-04-22 CN CN2011201206639U patent/CN202084601U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201583A (en) * | 2011-04-22 | 2011-09-28 | 沈阳建筑大学 | Proton exchange membrane fuel cell flow field structure |
| CN104347888A (en) * | 2014-10-15 | 2015-02-11 | 北京氢璞创能科技有限公司 | Water cooled proton exchange membrane fuel cell stack and water cooled proton exchange membrane fuel cell |
| CN104833925A (en) * | 2015-05-07 | 2015-08-12 | 昆山弗尔赛能源有限公司 | Fuel cell bipolar plate detection method and system based on machine vision |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20140422 |