CN215644582U - Proton exchange membrane fuel cell cathode plate - Google Patents
Proton exchange membrane fuel cell cathode plate Download PDFInfo
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- CN215644582U CN215644582U CN202121650774.0U CN202121650774U CN215644582U CN 215644582 U CN215644582 U CN 215644582U CN 202121650774 U CN202121650774 U CN 202121650774U CN 215644582 U CN215644582 U CN 215644582U
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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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Abstract
The utility model discloses a proton exchange membrane fuel cell cathode plate, wherein one side of the cathode plate is provided with a cathode flow field, the cathode flow field comprises a cathode gas inlet, a cathode gas outlet and a cathode reaction area, the cathode reaction area is provided with a plurality of cathode flow channels extending from one side of the cathode gas inlet to one side of the cathode gas outlet, lugs in the cathode reaction area are arranged in rows along the axial direction of the cathode gas inlet and the cathode gas outlet on the cathode plate, and the lugs in each row are arranged in a way of being vertical to the axial direction of the cathode gas inlet and the cathode gas outlet on the cathode plate; the lugs in each row of lugs are arranged at intervals, and the interval between the adjacent lugs is smaller than the length of the lug cathode plate in the long axis direction; the adjacent two rows of bumps are arranged in a staggered manner, so that the bumps in one row are aligned with the gaps of the bumps in the other row; and a cathode flow channel is formed between the gaps in the same row of the bumps and the adjacent two rows of the bumps.
Description
Technical Field
The utility model relates to the field of fuel cell polar plates, in particular to a proton exchange membrane fuel cell cathode plate.
Background
The fuel cell is a power generation device which directly converts chemical energy existing in fuel and oxidant into electric energy, compared with the traditional power generation device, the fuel cell does not contain moving parts, has reliable work, less maintenance and low noise during work, does not generate harmful substances during work, and therefore, is an energy power device with great development prospect.
In the manufacturing process of the fuel cell, a plurality of single cells are required to be stacked to form a fuel cell stack, and the bipolar plate is one of important components of the stack and plays important roles of supporting and fixing a proton exchange membrane electrode, dividing fuel and oxidizing gas, collecting and conducting current and the like, so that the quality of the structure of the bipolar plate has decisive influence on the performance of the fuel electrode; and the bipolar plate includes an anode plate and a cathode plate.
The structure of the cathode plate of the existing proton exchange membrane fuel cell is as a bipolar plate structure of the proton exchange membrane fuel cell and a fuel cell stack disclosed by Chinese patent with the publication number of CN207233866U, and the structure is formed by laminating and bonding the anode plate and the cathode plate; the front side of the anode plate is provided with a hydrogen flow field; the front surface of the negative plate is provided with an air flow channel, and the air flow channel is formed by a plurality of air flow channel grooves; the back of the cathode plate is provided with a cooling liquid channel which is formed by a plurality of cooling liquid channel grooves; the air flow channel groove is not parallel to the cooling liquid flow channel groove; the projections of the air flow channel grooves and the cooling liquid flow channel grooves on the plane of the bipolar plate are mutually vertical; the cooling liquid runner groove is embedded into the air runner groove; so that the cross section of the air flow channel groove is periodically changed
The air flow channel of the cathode plate of the proton exchange membrane fuel cell is composed of a plurality of grooves, and the air flow channel can cause the problem of uneven gas concentration in an air flow field.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a cathode plate of a proton exchange membrane fuel cell, which adopts a special diffusion type flow channel and can effectively reduce the problem of uneven concentration of cathode gas in a cathode flow field.
A proton exchange membrane fuel cell cathode plate, wherein one side surface is provided with a cathode flow field which comprises a cathode gas inlet, a cathode gas outlet and a cathode reaction area,
the cathode reaction zone is provided with a plurality of cathode flow channels extending from one side of the cathode gas inlet to one side of the cathode gas outlet, the cathode reaction zone is provided with lugs, all the lugs are arranged in a row along the axial direction of the cathode gas inlet and the cathode gas outlet on the cathode plate, and the lugs in each row are arranged in a way that the cathode plate is vertical to the axial direction of the cathode gas inlet and the cathode gas outlet on the cathode plate;
the lugs in each row of lugs are arranged at intervals, and the interval between the adjacent lugs is smaller than the length of the lugs along the long axis direction of the cathode plate;
the adjacent two rows of bumps are arranged in a staggered manner, so that the bumps in one row are aligned with the gaps of the bumps in the other row;
and a cathode flow channel is formed between the gaps in the same row of the bumps and the adjacent two rows of the bumps.
Specifically, the inclined diffusion type cathode flow field is formed by the inclined lugs which are arranged in a row in a staggered manner, the problem of uneven concentration of cathode gas in the cathode flow field can be effectively solved, the partial pressure of the lateral flow direction of carbon paper can be increased, a cathode flow channel is formed between a gap in the lug in the same row and two adjacent rows of lugs, the pressure of the cathode gas in the cathode flow field can be kept, the sufficient reaction of the cathode gas can be further ensured, and the membrane electrode can be effectively prevented from collapsing due to the fine support formed by the lugs in the cathode flow field.
Preferably, the convex block forms a front and a back two-side inclined planes with a high middle and a low front and back along the minor axis direction of the cathode plate,
the bumps in two adjacent rows are arranged in a clearance mode or a part of the inclined plane is arranged in an overlapping mode.
Specifically, with the structure, by using the cathode flow channel formed between the bumps, the cathode gas can smoothly flow along the inclined direction of the cathode flow field and can keep a certain pressure, so that the cathode gas can fully react.
Preferably, the length of the bump is 1-2 mm, and the width of the bump is 0.5-1 mm; the inclined angle of the upper inclined plane of the convex block is 10-30 degrees.
Specifically, the bump can maintain a certain pressure of the cathode gas without affecting the smoothness of the cathode gas flow in such a size and in an inclined state.
Preferably, the cathode flow field includes a cathode gas inlet channel, a cathode gas inlet distribution region, a cathode reaction region, a cathode gas outlet distribution region, and a cathode gas outlet channel, which are sequentially arranged from a cathode gas inlet side to a cathode gas outlet side.
Specifically, the cathode gas enters the cathode gas inlet distribution area through the cathode gas inlet channel after entering from the cathode gas inlet, the cathode gas enters the cathode reaction area for reaction after being uniformly distributed by the cathode gas inlet distribution area, and the reacted cathode gas flows out from the cathode gas outlet after passing through the cathode gas outlet distribution area and the cathode gas outlet channel.
Preferably, the cathode gas inlet distribution area and the cathode gas outlet distribution area are formed by combining point-shaped bulges and elliptical bulges.
Specifically, the structure enables the gas distribution to be more uniform, is beneficial to the supporting effect of the cathode plate on the membrane electrode, and prevents the membrane electrode collapse phenomenon of the proton exchange membrane fuel cell when a plurality of bipolar plates and the membrane electrode are assembled.
Preferably, the cathode gas inlet and the cathode gas outlet are respectively arranged at two sides of the short axis of the cathode plate.
Specifically, the combination lug is high in the middle and low in the front and back in the short axis direction of the cathode plate to form a structure with front and back inclined planes, namely, the cathode flow field is inclined along the short axis direction, and the cathode gas inlet and the cathode gas outlet are respectively arranged on two sides of the short axis of the cathode plate, so that the flow of cathode gas is facilitated.
Preferably, the cathode gas inlets and the cathode gas outlets each include at least two arranged along the long axis direction of the cathode plate, a cathode gas inlet communicating channel for communicating each adjacent cathode gas inlet is arranged between each cathode gas inlet, and a cathode gas outlet communicating channel for communicating each adjacent cathode gas outlet is arranged between each cathode gas outlet.
Specifically, the structure of the cathode gas inlet intercommunication channel and the cathode gas outlet intercommunication channel is beneficial to the uniform distribution of the cathode gas under the assembly of the multi-section bipolar plate.
Compared with the prior art, the utility model has the advantages that:
(1) the cathode flow field formed by the bumps which are arranged in rows and are arranged in a staggered mode is beneficial to increasing the flow direction partial pressure of the carbon paper side, and meanwhile, the bumps form fine supports to prevent the membrane electrode from collapsing.
(2) The structure of the cathode gas inlet distribution area ensures that the cathode gas is distributed more uniformly after entering the cathode reaction area; the cathode gas outlet distribution area is structured so that the products after the reaction in the cathode reaction area can be rapidly discharged.
(3) The structure of the cathode gas inlet intercommunication channel is beneficial to the uniform distribution of the cathode gas under the assembly of the bipolar plates of the multi-section proton exchange membrane fuel cell.
Drawings
FIG. 1 is a schematic view of a cathode plate of a proton exchange membrane fuel cell provided by the present embodiment;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Detailed Description
The utility model is further described with reference to the following drawings and detailed description.
As shown in fig. 1-2, both sides of the short axis of the cathode plate 100 are respectively provided with a cathode gas inlet 110 and a cathode gas outlet 120, each of the cathode gas inlet 110 and the cathode gas outlet 120 comprises at least two cathode plates 100 arranged in the long axis direction, and the cathode plate 100 is provided with a cathode reaction area communicated with the cathode gas inlet 110 and the cathode gas outlet 120; the cathode gas enters the cathode plate 100 from the cathode gas inlet 110, then enters the cathode gas inlet 140 from the cathode gas inlet communicating channel 180, then flows into the cathode gas inlet distribution area 160 from the cathode gas inlet 140, enters the cathode reaction area after being uniformly distributed by the cathode gas inlet distribution area 160, flows into the cathode gas outlet distribution area 170 after being reacted in the cathode reaction area, enters the cathode gas outlet channel 150 after being uniformly distributed by the cathode gas outlet distribution area 170, then flows into the cathode gas outlet communicating channel 190 from the cathode gas outlet channel 150, and finally flows out from the cathode gas outlet 120.
The cathode reaction zone is provided with lugs 131 facing to the side away from the anode plate, the lugs 131 are arranged in rows along the long axis direction of the cathode plate 100, the length of the lugs 131 along the long axis direction of the cathode plate 100 is 1-2 mm, the lugs 131 in each row are arranged along the short axis direction of the cathode plate 100, the width of the lugs 131 along the long axis direction of the cathode plate 100 is 0.5-1 mm, and the inclination angle of the upper inclined plane of the lugs is 10-30 degrees; the bumps 131 in each row of bumps 131 are arranged at intervals, and the interval between adjacent bumps 131 is smaller than the length of the bumps 131 along the long axis direction of the cathode plate 100; the bumps 131 in two adjacent rows are arranged in a staggered manner, so that the bumps 131 in one row are aligned with the gaps of the bumps 131 in the other row; the gaps in the same row of bumps 131 and the cathode runners 130 formed between two adjacent rows of bumps 131; the protrusions 131 are high in the middle and low in the front and back along the short axis direction of the cathode plate 100 to form front and back inclined surfaces, and two adjacent rows of the protrusions 131 are arranged with a gap therebetween or a part of the inclined surfaces are arranged in an overlapping manner.
When the proton exchange membrane fuel cell bipolar plate is used, the proton exchange membrane fuel cell bipolar plate is vertically arranged along the short axis direction, namely the short axis of the cathode plate 100 is vertical to the placing surface, the cathode gas inlet 110 is positioned on the upper side of the proton exchange membrane fuel cell bipolar plate, the cathode gas outlet 120 is positioned on the lower side of the proton exchange membrane fuel cell bipolar plate, and the cathode gas flows from top to bottom.
Claims (7)
1. A proton exchange membrane fuel cell cathode plate, wherein one side surface has the cathode flow field, the cathode flow field includes cathode gas entry, cathode gas export and cathode reaction district, its characterized in that:
the cathode reaction zone is provided with a plurality of cathode flow channels extending from one side of the cathode gas inlet to one side of the cathode gas outlet, the cathode reaction zone is provided with lugs, all the lugs are arranged in a row along the axial direction of the cathode gas inlet and the cathode gas outlet on the cathode plate, and all the lugs are arranged along the axial direction vertical to the cathode gas inlet and the cathode gas outlet on the cathode plate;
the lugs in each row of lugs are arranged at intervals, and the interval between the adjacent lugs is smaller than the length of the lugs along the long axis direction of the cathode plate;
the adjacent two rows of bumps are arranged in a staggered manner, so that the bumps in one row are aligned with the gaps of the bumps in the other row;
and a cathode flow channel is formed between the gaps in the same row of the bumps and the adjacent two rows of the bumps.
2. A proton exchange membrane fuel cell cathode plate as claimed in claim 1, wherein: the convex block forms front and back two-side inclined planes in the short axis direction of the cathode plate with a high middle and a low front and back,
the bumps in two adjacent rows are arranged in a clearance mode or a part of the inclined plane is arranged in an overlapping mode.
3. A proton exchange membrane fuel cell cathode plate as claimed in claim 2, wherein: the length of the lug is 1-2 mm, and the width of the lug is 0.5-1 mm; the inclined angle of the upper inclined plane of the convex block is 10-30 degrees.
4. A proton exchange membrane fuel cell cathode plate as claimed in claim 1, wherein: the cathode flow field comprises a cathode gas inlet channel, a cathode gas inlet distribution area, a cathode reaction area, a cathode gas outlet distribution area and a cathode gas outlet channel which are sequentially arranged from one side of a cathode gas inlet to one side of a cathode gas outlet.
5. A proton exchange membrane fuel cell cathode plate as claimed in claim 4, wherein: the cathode gas inlet distribution area and the cathode gas outlet distribution area are formed by combining point-shaped bulges and elliptical bulges.
6. A proton exchange membrane fuel cell cathode plate as claimed in claim 4, wherein: the cathode gas inlet and the cathode gas outlet are respectively arranged at two sides of the short shaft of the cathode plate.
7. A proton exchange membrane fuel cell cathode plate as claimed in claim 6, wherein: the cathode gas inlets and the cathode gas outlets respectively comprise at least two cathode gas inlets which are arranged along the long axis direction of the cathode plate, cathode gas inlet intercommunication channels which are communicated with the adjacent cathode gas inlets are arranged between the cathode gas inlets, and cathode gas outlet intercommunication channels which are communicated with the adjacent cathode gas outlets are arranged between the cathode gas outlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121650774.0U CN215644582U (en) | 2021-07-20 | 2021-07-20 | Proton exchange membrane fuel cell cathode plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121650774.0U CN215644582U (en) | 2021-07-20 | 2021-07-20 | Proton exchange membrane fuel cell cathode plate |
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| CN215644582U true CN215644582U (en) | 2022-01-25 |
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| CN202121650774.0U Active CN215644582U (en) | 2021-07-20 | 2021-07-20 | Proton exchange membrane fuel cell cathode plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468024A (en) * | 2023-10-31 | 2024-01-30 | 温州高企氢能科技有限公司 | Array flow field structure for producing hydrogen by alkaline water electrolysis and electrolytic tank |
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2021
- 2021-07-20 CN CN202121650774.0U patent/CN215644582U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468024A (en) * | 2023-10-31 | 2024-01-30 | 温州高企氢能科技有限公司 | Array flow field structure for producing hydrogen by alkaline water electrolysis and electrolytic tank |
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