CN116014168A - Fuel cell flow field plate - Google Patents
Fuel cell flow field plate Download PDFInfo
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- CN116014168A CN116014168A CN202310141354.7A CN202310141354A CN116014168A CN 116014168 A CN116014168 A CN 116014168A CN 202310141354 A CN202310141354 A CN 202310141354A CN 116014168 A CN116014168 A CN 116014168A
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- 239000000446 fuel Substances 0.000 title claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000009792 diffusion process Methods 0.000 claims description 21
- 230000000903 blocking effect Effects 0.000 claims description 15
- 230000003197 catalytic effect Effects 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 15
- 239000007789 gas Substances 0.000 abstract description 38
- 238000003487 electrochemical reaction Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 abstract 2
- 239000000376 reactant Substances 0.000 description 27
- 239000012495 reaction gas Substances 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000009826 distribution Methods 0.000 description 10
- 206010013496 Disturbance in attention Diseases 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011664 nicotinic acid Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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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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- Fuel Cell (AREA)
Abstract
The invention relates to a fuel cell flow field plate, which comprises a plurality of groups of first grooves which are arranged on the surface of a polar plate material in parallel, wherein the plurality of groups of first grooves form a parallel flow field, and one side of the parallel flow field is provided with an air inlet; the second grooves are positioned on the convex surfaces formed between two adjacent groups of first grooves, form flow fields in the ribs and are parallel to the first grooves; and the third grooves are positioned on the convex surfaces formed between two adjacent groups of first grooves and penetrate through the first grooves and the second grooves, are uniformly distributed in groups, form branches of a flow field in the rib, and are provided with rib air inlets at the tail end. The cathode catalyst layer can not only prevent gas from diffusing along the same path, but also more effectively convey oxygen into a flow field under the rib, thereby improving the water removing property of the area, helping more uniform electrochemical reaction in the cathode catalyst layer, and further enhancing the cell performance under high current density.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a flow field plate of a fuel cell.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
A Fuel Cell is a power generation device that directly converts chemical energy stored in Fuel and oxidant into electric energy without combustion. The method is free from the limitation of the Carnot cycle because of no heat engine process, has high energy conversion rate (40-60 percent), is environment-friendly and hardly discharges oxides of nitrogen and sulfur. Proton Exchange Membrane Fuel Cells (PEMFCs) use hydrogen as an anode fuel to generate electricity by chemical reaction with oxygen at a cathode. High energy conversion efficiency and low to zero pollutant emissions make Proton Exchange Membrane (PEM) fuel cells one of the promising power sources for vehicles, power plants, portable devices, and the like.
The bipolar plate is one of key components of the PEMFC, and generally accounts for more than 60% of the mass of the battery, and more than 30% of the cost, and has the functions of guiding out current, dissipating heat, providing necessary mechanical support for a galvanic pile, providing oxide and fuel for a membrane electrode, discharging unreacted gas and reaction products and the like. At present, the structure of the bipolar plate is limited, so that the reactant gas is unevenly distributed on the surface of the electrode, the local overheating of the battery can be caused, local product water is gathered, the transmission of the reactant gas is unsmooth, the resistance is increased, the output power of the fuel battery is reduced, and the service life of the fuel battery is shortened.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a fuel cell flow field plate, wherein parallel flow fields and rib middle flow fields which are alternately distributed but communicated are formed on the surface of a cathode flow field plate, and blocking blocks are arranged in the rib middle flow fields to block part of reaction gas so as to forcedly diffuse the reaction gas to a catalytic layer, so that part of reactants are prevented from flowing away from the gas diffusion layer and not participating in reaction, the concentration loss is reduced, the amount of unreacted gas at an outlet of a cell is reduced, the fuel utilization rate is increased, and the working efficiency of a system is improved; meanwhile, the reactant concentration in the area under the rib is increased, the reactant distribution is more uniform, and the membrane current density distribution of the fuel cell is more uniform.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a first aspect of the invention provides a fuel cell flow field plate comprising:
the first grooves are arranged on the surface of the polar plate material in parallel, a plurality of groups of first grooves form parallel flow fields, and one side of each parallel flow field is provided with an air inlet;
the second grooves are positioned on the convex surfaces formed between two adjacent groups of first grooves, form flow fields in the ribs and are parallel to the first grooves;
the third grooves are positioned on the convex surfaces formed between two adjacent groups of first grooves and penetrate through the first grooves and the second grooves, are uniformly distributed in groups and form branches of a flow field in the rib, and the tail end of each branch is provided with a rib air inlet;
the blocking blocks are positioned in the second groove and close to the third groove, multiple groups of blocking blocks are distributed at intervals along the gas flow direction, and the distance between adjacent blocking blocks is gradually reduced.
The third grooves are symmetrically arranged on both sides of the second grooves to form branches of the second grooves, namely branches of the flow field in the rib.
The axis of each group of third grooves is at a set angle with the axis of the second groove.
The depth of the parallel flow field is greater than the depth of the flow field in the rib.
The depth of the parallel flow fields and the depth of the flow fields in the ribs gradually decrease in the direction of gas flow.
The protrusions between two adjacent groups of first grooves form rib-shaped structures on the surface of the polar plate material, and the whole flow field is divided into a parallel flow field and a flow field in the ribs by the rib-shaped structures.
The height of the protrusion formed between the blocking block and the adjacent two groups of first grooves is the same.
The polar plate is positioned at one side of the proton exchange membrane, and a diffusion layer and a catalytic layer are sequentially arranged between the polar plate and the proton exchange membrane.
Compared with the prior art, the above technical scheme has the following beneficial effects:
1. when the reaction gas of the fuel cell flows through the second groove and the third groove, the formed flow field is similar to a fishbone shape, so that the gas can be prevented from diffusing along the same path, and oxygen can be more effectively conveyed into the cathode diffusion layer below the rib, thereby improving the water removing property of the area, helping the more uniform electrochemical reaction in the cathode catalytic layer, enhancing the cell performance under high current density, and effectively solving the problem that the improvement of mass transmission and water removing usually comes at the cost of pumping loss.
2. The first grooves which are arranged in parallel form a rib-shaped structure flow field on the surface of the polar plate by the bulges between two adjacent first grooves, the rib-shaped structure surface of each rib-shaped structure is provided with a rib middle flow field with branches, all air inlets are positioned on the same side of the rib-shaped flow field, a plurality of rib air inlets are positioned on two sides of each rib and are uniformly distributed, the whole flow field is divided into a parallel flow field and a rib middle flow field by the rib-shaped structures, the branch flow field formed by the third groove is communicated, reaction gas enters the parallel flow field from the air inlets, part of gas flows into the rib middle flow field from the rib air inlets, the reactant concentration in the area under the rib is increased, the reactant distribution is more uniform, and the membrane current density distribution of the fuel cell is more uniform.
3. The blocking block can block the reaction gas of the flow field in the rib to forcedly diffuse so as to reach the catalytic layer for electrochemical reaction, so that the problem that part of reactants flow away from the gas diffusion layer and do not participate in the reaction is avoided, the concentration loss is reduced, the amount of unreacted gas at the outlet of the battery is reduced, the fuel utilization rate is increased, and the working efficiency of the system is improved.
4. The flow field in the rib can simultaneously receive the reaction gas entering from the rib air inlets symmetrically distributed at two sides, and the convection of the inlet gas at two sides ensures the sufficient diffusion of the reaction gas in the area under the rib, improves the diffusion mass transfer efficiency of reactants, improves the utilization rate of the reactants and improves the output efficiency of the fuel cell.
5. The cathode flow field plate has simple and symmetrical structure, and the shape, position and size of the rib air inlet and the flow field in the rib can be flexibly adjusted according to actual conditions, thereby being convenient for processing and manufacturing and being beneficial to industrial production and application.
6. The depth of the parallel flow field and the depth of the flow field in the rib gradually decrease along the gas flow direction, so that a certain included angle is formed between the flow direction and the diffusion direction to force more reaction gas to enter the diffusion layer and the catalytic layer, thereby improving the reaction efficiency and the current density.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic diagram of a proton exchange membrane fuel cell according to one or more embodiments of the present invention;
FIG. 2 is a schematic diagram of a flow field of a bionic fishbone cathode according to one or more embodiments of the invention;
fig. 3 is a schematic structural diagram of a bionic fishbone cathode flow field in a top view according to one or more embodiments of the present invention;
in the figure: 1-anode bipolar plate, 2-anode runner, 3-anode diffusion layer, 4-anode catalytic layer, 5-proton exchange membrane, 6-cathode catalytic layer, 7-cathode diffusion layer, 8-cathode runner, 9-cathode bipolar plate, 10-air inlet, 11-rib air inlet, 12 parallel flow field, 13-rib middle flow field, 14-plate and 15-block.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As described in the background art, the fuel cell is limited by the structure of the bipolar plate, so that the reactant gas is unevenly distributed on the surface of the electrode, local overheating of the cell can be caused, local product water is accumulated, the reactant gas is not smoothly transmitted, the resistance is increased, the output power of the fuel cell is reduced, and the service life of the fuel cell is shortened.
Therefore, the following examples provide a fuel cell flow field plate, in which parallel flow fields and rib flow fields are formed on the surface of a cathode flow field plate, wherein the parallel flow fields and the rib flow fields are alternately distributed but communicated with each other, and grooves required for forming the rib flow fields have a structure similar to a fishbone shape, so that reactant gas enters the parallel flow fields from an air inlet, and part of the reactant gas flows into the rib flow fields from the rib air inlet, so that the reactant concentration in the area under the rib is increased, the reactant distribution is more uniform, and the membrane current density distribution of the fuel cell is more uniform. The blocking blocks which are arranged along the gas flow direction and are positioned in the second groove and close to the third groove can block the reaction gas of the flow field in the rib to be forcedly diffused so as to reach the catalytic layer for electrochemical reaction, so that partial reactants are prevented from flowing away from the gas diffusion layer and not participating in the reaction. The concentration loss is reduced, the amount of unreacted gas at the outlet of the battery is reduced, the fuel utilization rate is increased, and the working efficiency of the system is improved.
Embodiment one:
as shown in fig. 1-3, a fuel cell flow field plate comprising:
the first grooves are arranged on the surface of the polar plate material 14 in parallel, a plurality of groups of first grooves form a parallel flow field 12, and one side of the parallel flow field 12 is provided with an air inlet 10;
the second grooves are positioned on the convex surfaces formed between two adjacent groups of first grooves, the second grooves form flow fields 13 in the ribs and are parallel to the first grooves, and the depth of the parallel flow fields 12 is larger than that of the flow fields 13 in the ribs;
the third grooves are positioned on the convex surfaces formed between two adjacent groups of first grooves and penetrate through the first grooves and the second grooves, are uniformly distributed and form a plurality of groups of branches of a flow field 13 in the rib, and the tail end of each branch is provided with a rib air inlet 11;
the blocking blocks 15 are positioned in the second groove and close to the third groove, a plurality of groups of blocking blocks are distributed at intervals along the gas flow direction, and the distance between adjacent blocking blocks is gradually reduced. The height of the blocking piece 15 is the same as that of the protrusions formed between the adjacent two groups of first grooves.
The first grooves are arranged in parallel, so that the protrusions between two adjacent first grooves form rib-shaped flow fields on the surface of the polar plate 14, the rib-shaped flow fields 13 with branches are arranged on the surface of each rib-shaped structure, all the air inlets 10 are positioned on the same side of the rib-shaped flow fields, the rib air inlets 11 are positioned on two sides of each rib and are uniformly distributed, the whole flow field is divided into a parallel flow field 12 and a rib-shaped flow field 13 by the rib-shaped structure, the reaction gas is communicated by the branch flow fields formed by the third grooves, the reaction gas enters the parallel flow field 12 from the air inlets 10, part of the gas flows into the rib-shaped flow fields 13 from the rib air inlets 11, the reactant concentration in the area under the ribs is increased, the reactant distribution is more uniform, and the membrane current density distribution of the fuel cell is more uniform.
The blocking piece 15 can block the reaction gas of the flow field 13 in the rib to forcedly diffuse to reach the catalytic layer where electrochemical reaction occurs, so that partial reactants are prevented from flowing away from the gas diffusion layer and not participating in the reaction. The concentration loss is reduced, the amount of unreacted gas at the outlet of the battery is reduced, the fuel utilization rate is increased, and the working efficiency of the system is improved.
Specific:
the device comprises a polar plate 14, an air inlet 10, a rib air inlet 11, a parallel flow field 12 formed by first grooves and a rib middle flow field 13 formed by second grooves, wherein protrusions between two adjacent groups of first grooves form a rib-shaped structure of the polar plate 14.
All the air inlets 10 are positioned on the same side of the whole flow field, the rib air inlets 11 are positioned on two sides of each rib and are uniformly distributed, and the whole flow field is divided into a parallel flow field 12 and a flow field 13 in the rib by the rib part, but is penetrated by the flow field formed by the third groove. The air inlet 10, the rib air inlet 11 and the rib middle flow field 13 are all processed on the polar plate 14. The reaction gas enters the parallel flow field 12 from the gas inlet 10, part of the gas flows into the flow field 13 in the rib from the rib gas inlet 11, and the whole flow field is symmetrically distributed. The block 15 is located in the second recess and close to the third recess. The blocks 15 are arranged in the gas flow direction with shorter and shorter distances between adjacent blocks 15. The height of the blocks is the same as the height of the "rib" like structure.
In this embodiment, the inlet is located on one side of the overall flow field structure and is polygonal or circular in shape.
In this embodiment, the depth of the parallel flow field is different from the depth of the flow field in the rib, and the depth of the parallel flow field is greater than the depth of the flow field in the rib.
In this embodiment, the entire flow field is divided by the rib portion into a parallel flow field and a flow field in the rib, but is mutually penetrated.
In this embodiment, the rib air inlets are located on both sides of each rib and are uniformly distributed.
In this embodiment, the number of the rib air inlets can be adjusted according to the area of the electrode plates, the number is in direct proportion to the area of the electrode plates, and the larger the area of the electrode plates is, the larger the number is.
In this embodiment, the width of the flow field in different ribs may be designed to taper or expand, and the initial width may be different.
In this embodiment, the rib air inlets on both sides of the flow field in the rib are symmetrically distributed, and the widths of the adjacent rib air inlets may be different.
In this embodiment, the flow field plate is made of graphite material or metal.
On one side of the overall flow field structure is an inlet 10, the inlet 10 may be polygonal or circular in shape, and reactant gases flow from the inlet 10 along parallel flow fields 12. In the rib of the cathode flow field, a rib middle flow field and branches thereof are designed, the tail end of each branch is a rib air inlet 11, and part of reaction gas in the parallel flow field enters the rib middle flow field 13 from the rib air inlet 11, so that the gas is prevented from diffusing along only one path. When the reactant gas enters the rib middle flow field 13 through the rib air inlet 11, the reactant concentration in the area under the rib is increased, the reactant distribution is more uniform, and the film current density distribution is more uniform.
The second grooves and the third grooves form a structure similar to a fishbone, and when the cathode GDL is applied to a fuel cell, oxygen can be more effectively conveyed to a cathode GDL (diffusion layer) below a rib, so that the water removal property of the area is improved, more uniform electrochemical reaction in a cathode catalytic layer is assisted, the cell performance is enhanced under high current density, and the problems that the quality transmission and the water removal are improved usually at the cost of pumping loss are effectively solved.
The plurality of groups of blocks located in the second groove and adjacent to the third groove are arranged along the gas flow direction, the distance between adjacent blocks is shorter and shorter, and the height of the blocks is the same as that of the rib-shaped structure. The reaction gas of the flow field in the rib can be trapped to be forcedly diffused so as to reach the catalytic layer for electrochemical reaction, and partial reactants are prevented from flowing away from the gas diffusion layer and not participating in the reaction. The concentration loss is reduced, the amount of unreacted gas at the outlet of the battery is reduced, the fuel utilization rate is increased, and the working efficiency of the system is improved.
The whole flow field is divided into a parallel flow field 12 and a flow field 13 in the rib by the rib part, but the parallel flow field 12 is communicated with the rib, the depth of the parallel flow field 12 is larger than that of the flow field 13 in the rib, and the depth of the parallel flow field 12 and the depth of the flow field 13 in the rib are designed to gradually decrease along the gas flowing direction, so that a certain included angle is formed between the flowing direction and the diffusion direction to force more reaction gas to enter the diffusion layer and the catalytic layer, thereby improving the reaction efficiency and the current density.
The width of the flow field 13 in the different ribs can also be designed to decrease linearly in the direction of gas flow. For example: the variation curve of the width of the flow field in the rib is: z=0.4-d x;
wherein z is the width of the flow channel structure, x is the length of the flow channel, and d is a constant coefficient.
In addition, the coefficient d was 0.00375 in consideration of the battery performance, the support of the current collecting plate, the heat dissipation of the battery, and the like.
The rib air inlets 11 on two sides of the flow field 13 in the rib are symmetrically distributed, and the widths of the adjacent rib air inlets 11 can be different or the same. The number of rib inlets 11 is proportional to the area of the plate material, and the larger the area of the plate material is, the larger the number is. In the structure, the flow field 13 in the rib can simultaneously receive the reaction gas entering from the rib air inlets 11 symmetrically distributed at two sides, and the convection of the inlet gas at two sides ensures the sufficient diffusion of the reaction gas in the area under the rib, improves the diffusion mass transfer efficiency of reactants, improves the utilization rate of the reactants and improves the output efficiency of the fuel cell.
Embodiment two:
as shown in fig. 1, a fuel cell includes an anode bipolar plate and a cathode bipolar plate on both sides of a proton exchange membrane, wherein the cathode bipolar plate is the first embodiment.
Specifically, the anode bipolar plate comprises an anode bipolar plate 1, an anode diffusion layer 3, an anode catalytic layer 4, a proton exchange membrane 5, a cathode catalytic layer 6, a cathode diffusion layer 7 and a cathode bipolar plate 9 which are sequentially connected, wherein the surfaces of the anode bipolar plate 1 and the cathode bipolar plate 9 are respectively provided with an anode runner 2 and a cathode runner 8.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fuel cell flow field plate comprising the steps of:
the first grooves are arranged on the surface of the polar plate material in parallel, a plurality of groups of first grooves form parallel flow fields, and one side of each parallel flow field is provided with an air inlet;
the second grooves are positioned on the convex surfaces formed between two adjacent groups of first grooves, form flow fields in the ribs and are parallel to the first grooves;
the third grooves are positioned on the convex surfaces formed between two adjacent groups of first grooves and penetrate through the first grooves and the second grooves, are uniformly distributed in groups and form branches of a flow field in the rib, and the tail end of each branch is provided with a rib air inlet;
the blocking blocks are positioned in the second groove and close to the third groove, multiple groups of blocking blocks are distributed at intervals along the gas flow direction, and the distance between adjacent blocking blocks is gradually reduced.
2. A fuel cell flow field plate as claimed in claim 1 wherein the projections between adjacent sets of first grooves form rib-like structures on the surface of the plate material, the entire flow field being divided by the rib-like structures into parallel flow fields and rib-in flow fields.
3. A fuel cell flow field plate as claimed in claim 1 in which the third grooves are symmetrically disposed on either side of the second grooves forming branches of the second grooves, i.e. forming branches of the flow field in the rib.
4. A fuel cell flow field plate as claimed in claim 3, wherein the axis of each third set of grooves is at a set angle to the axis of the second grooves.
5. A fuel cell flow field plate as claimed in claim 1 wherein the depth of the parallel flow fields is greater than the depth of the flow fields in the ribs.
6. A fuel cell flow field plate as claimed in claim 4 in which the depth of the parallel flow fields and the depth of the flow fields in the ribs taper in the direction of gas flow.
7. A fuel cell flow field plate as claimed in claim 1, in which the plugs are of the same height as the lands formed between adjacent sets of first grooves.
8. A fuel cell flow field plate as claimed in claim 1, wherein said second and third grooves are formed in a fishbone shape.
9. A fuel cell flow field plate as claimed in claim 1 wherein said plate material is located on one side of a proton exchange membrane.
10. The fuel cell of claim 9, wherein a diffusion layer and a catalytic layer are disposed in sequence between the polar plate and the proton exchange membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310141354.7A CN116014168A (en) | 2023-02-16 | 2023-02-16 | Fuel cell flow field plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310141354.7A CN116014168A (en) | 2023-02-16 | 2023-02-16 | Fuel cell flow field plate |
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| CN116014168A true CN116014168A (en) | 2023-04-25 |
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| CN202310141354.7A Pending CN116014168A (en) | 2023-02-16 | 2023-02-16 | Fuel cell flow field plate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550875A (en) * | 2018-04-25 | 2018-09-18 | 武汉理工大学 | A kind of flow channels for proton exchange membrane fuel cells |
| CN109065907A (en) * | 2018-08-21 | 2018-12-21 | 上海空间电源研究所 | A kind of fuel battery polar plate flow field structure and fuel battery pole board |
| CN110571451A (en) * | 2019-09-30 | 2019-12-13 | 天津商业大学 | Flow field structure of fuel cell |
| CN210489736U (en) * | 2019-09-30 | 2020-05-08 | 天津商业大学 | Flow field structure of fuel cell |
| CN113571731A (en) * | 2021-06-08 | 2021-10-29 | 山东大学 | Composite bionic flow field of proton exchange membrane fuel cell and application thereof |
| CN114050282A (en) * | 2021-10-10 | 2022-02-15 | 北京工业大学 | Fuel cell flow field plate with liquid water self-adaptive combined flow guide structure |
-
2023
- 2023-02-16 CN CN202310141354.7A patent/CN116014168A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550875A (en) * | 2018-04-25 | 2018-09-18 | 武汉理工大学 | A kind of flow channels for proton exchange membrane fuel cells |
| CN109065907A (en) * | 2018-08-21 | 2018-12-21 | 上海空间电源研究所 | A kind of fuel battery polar plate flow field structure and fuel battery pole board |
| CN110571451A (en) * | 2019-09-30 | 2019-12-13 | 天津商业大学 | Flow field structure of fuel cell |
| CN210489736U (en) * | 2019-09-30 | 2020-05-08 | 天津商业大学 | Flow field structure of fuel cell |
| CN113571731A (en) * | 2021-06-08 | 2021-10-29 | 山东大学 | Composite bionic flow field of proton exchange membrane fuel cell and application thereof |
| CN114050282A (en) * | 2021-10-10 | 2022-02-15 | 北京工业大学 | Fuel cell flow field plate with liquid water self-adaptive combined flow guide structure |
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