CN107968210B - Fuel cell cathode and anode plate with asymmetric structure and electric pile formed by same - Google Patents
Fuel cell cathode and anode plate with asymmetric structure and electric pile formed by same Download PDFInfo
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- CN107968210B CN107968210B CN201711438496.0A CN201711438496A CN107968210B CN 107968210 B CN107968210 B CN 107968210B CN 201711438496 A CN201711438496 A CN 201711438496A CN 107968210 B CN107968210 B CN 107968210B
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- 239000000446 fuel Substances 0.000 title claims abstract description 32
- 239000007800 oxidant agent Substances 0.000 claims abstract description 80
- 230000001590 oxidative effect Effects 0.000 claims abstract description 76
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 72
- 239000002826 coolant Substances 0.000 claims abstract description 66
- 239000012528 membrane Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 32
- 239000012530 fluid Substances 0.000 abstract description 15
- 239000012495 reaction gas Substances 0.000 abstract description 8
- 238000013021 overheating Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of 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
- 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
Abstract
The invention discloses a fuel cell cathode and anode plate with an asymmetric structure and a galvanic pile formed by the same, wherein the cathode and anode plate is characterized in that: the anode plate and the cathode plate are of asymmetric structures, the areas of the outflow channels of the oxidant, the reducing agent and the coolant on the anode plate and the cathode plate are larger than or equal to the areas of the inflow channels corresponding to the outflow channels, and the ratio of the area of the medium outflow channel to the area of the medium inflow channel is 1-4. The invention can uniformly distribute the reaction gas required by the discharge of each battery of the electric pile, reduce the flow difference of three fluid mediums of oxidant, reducing agent and coolant in the electric pile distributed from respective distribution channels into each battery, ensure uniform current density distribution, avoid local overheating, and further improve the uniformity of the electrical property output by each battery.
Description
Technical Field
The invention relates to the field of fuel cells, in particular to a fuel cell cathode and anode plate with an asymmetric structure and a galvanic pile formed by the fuel cell cathode and anode plate.
Background
A fuel cell (PEMFC) generates electricity through an electrochemical reaction between hydrogen as a fuel gas and oxygen (or air) as an oxidant gas. The PEMFC has the characteristics of high efficiency, high current density, high power density, short start-up time, quick response to load change, and the like.
However, since the output voltage of the unit fuel cell is low, typically 0.6-0.8V, in practical use, a plurality of unit cells need to be connected in series to form a stack, and in the thickness direction of the stack, the fluid distribution channels on each unit cell form a fluid distribution pipeline. When the fuel cell works, externally supplied reaction gas and coolant are distributed into each single cell through respective fluid distribution pipelines, enter the single cell flow field, then reach the catalytic layer reaction zone through the diffusion layer, generate current through electrochemical reaction, and exhaust after reaction is discharged through the fluid distribution outlet pipeline. Because of factors such as flow resistance, throttling and the like, the air inlet pressure and the air inlet flow of each cell in the electric pile are difficult to be uniform, and the flow distribution condition of the air in the electric pile influences the sufficient degree of the reactant gas supply of each cell, if the reactant gas is distributed unevenly in each cell, the current density, the power density and the heating value of the electric pile are distributed unevenly, and partial water loss, overheating and the like are possible, so that the cell performance difference of different areas in the electric pile is larger. Therefore, the flow distribution uniformity performance among the individual cells directly relates to the uniformity of the stack output performance.
For a high-power fuel cell stack, the output power is generally about 100KW, the number of stacked single cells is generally about 300 knots, the flow rate to be supplied becomes larger with the increase of the number of the stacks, and the flow rate distribution of each cell is often uneven due to the complex fluid mechanics principle in the fluid distribution pipeline. Moreover, as the stack thickness dimension increases, the uniformity of distribution within the fluid distribution channels is also increased, and thus, for a high power fuel cell stack, the design of the fluid distribution channels directly affects the overall output performance of the stack, and if an accurate design calculation is lacking, the flow may exhibit a decreasing phenomenon in the distribution channels with a certain direction.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, uniformly distribute the reaction gas required by the discharge of each battery of the electric pile under the condition of ensuring a certain reactant flow, reduce the flow difference of three fluid media of oxidant, reducing agent and coolant distributed into each battery from respective distribution channels, ensure uniform current density distribution, avoid local overheating, and further improve the uniformity of the electrical property output by each battery.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the fuel cell cathode and anode plates with asymmetric structure comprises a cathode plate for distributing oxidant and an anode plate for distributing reducer, wherein the cathode plate and the anode plate are respectively provided with an oxidant inflow channel for flowing in the oxidant, a reducer inflow channel for flowing in the reducer, a coolant inflow channel for flowing in the coolant, an oxidant outflow channel for flowing out the oxidant, a reducer outflow channel for flowing out the reducer, and a coolant outflow channel for flowing out the coolant, the oxidant inflow channel, the reducer inflow channel and the coolant inflow channel on the cathode plate are respectively and completely consistent with the oxidant inflow channel, the reducer inflow channel and the coolant inflow channel on the anode plate, the oxidant outflow channel, the reducer outflow channel and the coolant outflow channel on the cathode plate are respectively and completely consistent with the oxidant outflow channel, the reducer outflow channel and the coolant outflow channel on the anode plate,
the anode plate is of an asymmetric structure and
the area of the oxidant inflow channel on the anode plate is 5cm 2 ～60cm 2 The ratio of the area of the oxidant outflow channel to the area of the oxidant inflow channel is in the range of 1-4;
the area of the reducing agent inflow channel on the anode plate is 2cm 2 ～20m 2 The ratio of the area of the reducing agent outflow channel to the area of the reducing agent inflow channel is 1-4;
the area of the coolant inflow channel on the anode plate is 5cm 2 ～60cm 2 The ratio of the area of the coolant outflow channel to the area of the coolant inflow channel ranges from 1 to 4.
Further, the ratio of the area of the oxidant outflow channel to the area of the oxidant inflow channel on the anode and cathode plates is 1.5; the ratio of the area of the coolant outflow channel to the area of the coolant inflow channel on the anode and cathode plates is 1.8; the ratio of the area of the reducing agent outflow channel to the area of the reducing agent inflow channel on the anode and cathode plates is 1.
Further, the oxidant inflow channels and the reducing agent inflow channels on the anode plate and the cathode plate are not on the same side of the anode plate and the cathode plate; or the oxidant inflow channel and the reducing agent inflow channel on the cathode plate and the anode plate are positioned on the same side of the cathode plate and the anode plate.
Further, the cross-sectional shape of each channel is achieved by adjusting the length, width, angle, corner radius or relative position of the cross-section.
Further, after the area of each channel is determined, the maximum value of the hydraulic diameter of each channel is selected as the optimal shape of each channel.
A fuel cell stack of asymmetric construction, characterized by being composed of any one of the cathode, anode and membrane electrode assemblies of claims 1-4.
Further, the stack is formed by welding any one of the cathode plate and the anode plate of claims 1 to 4 to form a bipolar plate, then stacking the bipolar plate and the membrane electrode assembly, and compressing and fastening the bipolar plate and the membrane electrode assembly.
Further, the cell stack is formed by bonding any one of the cathode and anode plates and the membrane electrode assembly according to claims 1 to 4 to form a single cell, and compressing and fastening a plurality of single cells.
The beneficial effects of the invention are as follows:
compared with the design of the cathode plate and the anode plate with equal inflow and outflow distribution channel areas, the invention can optimize the areas of the inflow and outflow distribution channels of the fluid medium under the condition that the whole cathode plate area is not changed greatly, so that the uniformity of flow distribution among batteries is improved, the uniformity of the performance output of a cell stack is improved, and the volume specific power of the fuel cell stack is improved;
on the premise of meeting the flow of the reaction gas required by the normal electrochemical reaction of the electric pile, the stoichiometric ratio of the reaction gas is reduced, namely the excess coefficient of the reaction gas obtained by each single cell is as close as possible to the excess coefficient of the inlet of the main pipe, so that the parasitic power consumption of an air compressor and a hydrogen circulating pump matched with the electric pile is reduced.
Drawings
FIG. 1 is a schematic view of a fuel cell cathode plate according to the present invention;
FIG. 2 is a schematic view of the structure of an anode plate of a fuel cell according to the present invention;
fig. 3 is a schematic view of a bipolar plate of the fuel cell of the present invention composed of a cathode plate and an anode plate;
FIG. 4 is a schematic view of a fuel cell stack structure according to the present invention;
FIG. 5 is a schematic view of a fuel cell stack structure according to the present invention;
FIG. 6 is a graph illustrating the difference in oxidizer flow rates between a stack and a comparative example in accordance with an embodiment of the present invention;
fig. 7 is a graph showing a difference in coolant flow rates between a stack and a comparative example according to an embodiment of the present invention.
In the figure: 1. a cathode plate oxidant inflow channel, 2, a cathode plate coolant inflow channel, 3, a cathode plate reductant outflow channel, 4, a cathode plate reductant inflow channel, 5, a cathode plate coolant outflow channel, 6, a cathode plate oxidant outflow channel, 7, an anode plate reductant outflow channel, 8, an anode plate coolant inflow channel, 9, an anode plate oxidant inflow channel, 10, an anode plate oxidant outflow channel, 11, an anode plate coolant outflow channel, 12, an anode plate reductant inflow channel, 13, an asymmetric structure cathode plate, 14, an asymmetric structure anode plate, 15, an asymmetric structure bipolar plate, 16, an asymmetric structure bipolar plate, 17, a membrane electrode assembly, 18, a flow channel of oxidant on a cathode, 19, a flow channel of oxidant on an anode, 20, an oxidant inlet distribution pipeline in a cell stack, 21, a coolant inlet distribution pipeline in a cell stack, 22, a reductant outlet distribution pipeline in a cell stack, 23, a reductant inlet distribution pipeline in a cell stack, 24, a coolant outlet distribution pipeline in a cell stack, 25, and an oxidant outlet distribution pipeline in a cell stack.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
In the following detailed description of the embodiments of the present invention, the structures of the present invention are not drawn to a general scale, and the structures in the drawings are partially enlarged, deformed, and simplified, so that the present invention should not be construed as being limited thereto.
An asymmetric fuel cell cathode and anode plate includes a cathode plate for dispensing an oxidant and an anode plate for dispensing a reductant. Referring to fig. 1, the cathode plate is provided with an oxidant inflow channel 1 for flowing in an oxidant, a reducing agent inflow channel 4 for flowing in a reducing agent, a coolant inflow channel 2 for flowing in a cooling agent, an oxidant outflow channel 6 for flowing out an oxidizing agent, a reducing agent outflow channel 3 for flowing out a reducing agent, and a coolant outflow channel 5 for flowing out a cooling agent, wherein the mediums enter from the medium inflow channels, react in the corresponding medium cavities, and the gas products after the reaction flow out from the corresponding medium outflow channels. In the middle of the cathode plate is an oxidant runner 18.
Referring to fig. 2, the anode plate is also provided with an oxidant inflow channel 9 into which an oxidant flows, a reducing agent inflow channel 12 into which a reducing agent flows, a coolant inflow channel 8 into which a coolant flows, an oxidant outflow channel 10 from which an oxidizing agent flows, a reducing agent outflow channel 7 from which a reducing agent flows, a coolant outflow channel 11 from which a coolant flows, and a reducing agent flow channel 19 is provided in the middle of the cathode plate.
The oxidant inflow channel 1 on the cathode plate is completely consistent with the oxidant inflow channel 9 on the anode plate; the oxidant outflow channel 6 on the cathode plate is completely consistent with the oxidant outflow channel 10 on the anode plate; the reducing agent inflow channel 4 on the cathode plate is completely consistent with the reducing agent inflow channel 12 on the anode plate; the reducing agent outflow channel 3 on the cathode plate is completely consistent with the reducing agent outflow channel 7 on the anode plate; the coolant inflow channels 2 on the cathode plate are completely identical to the coolant inflow channels 8 on the anode plate; the coolant outflow channel 5 on the cathode plate is identical to the coolant outflow channel 11 on the anode plate.
The invention affects the distribution flow field of the medium in the flow channel by making the inflow/outflow channel area of each medium different. The cathode plate is of an asymmetric structure, namely, on the cathode plate, the area of the oxidant outflow channel 6 is larger than that of the oxidant inflow channel 1, and the ratio of the two areas can be 1 to 4; the area of the reducing agent outflow channel 3 is larger than or equal to the area of the inflow channel 4, and the ratio of the two areas can be 1 to 4; the area of the coolant outflow channel 5 is larger than that of the inflow channel 2, and the ratio of the two areas may be 1 to 4. The anode plate is also of an asymmetric structure, the shape of the anode plate is the same as that of the anode plate, namely, the area of the oxidant outflow channel 10 is larger than that of the oxidant inflow channel 9 on the anode plate, and the ratio of the two areas is 1 to 4; the area of the reducing agent outflow channel 7 is equal to or larger than the area of the reducing agent inflow channel 12, and the ratio of the two areas can be 1 to 4; the area of the coolant outflow channel 11 is larger than the area of the coolant inflow channel 8, and the ratio of the two areas may be 1 to 4.
The oxidant, the reducing agent and the coolant on the anode and the cathode plates may be counter-current operation (the oxidant inflow channel and the reducing agent inflow channel are not on the same side of the anode and the cathode plates), or may be parallel-current operation (the oxidant inflow channel and the reducing agent inflow channel are on the same side of the anode and the cathode plates).
In the invention, the inflow channel areas of the oxidant and the reducing agent on the cathode plate and the anode plate are calculated by parameters such as the operation condition, the output power, the volume ratio power of the electric pile, the flow resistance reduction when the reaction gas medium is subjected to physical and chemical reaction when flowing through the respective flow fields, and the corresponding outflow channel areas of the oxidant and the reducing agent can be obtained by combining the area ratio of the oxidant and the outflow channel. Preferably, the area of the oxidant inflow channel may be 5cm 2 ～60cm 2 The area of the reducing agent inflow passage may be 2cm 2 ～20cm 2 。
The area of the coolant inflow channel on the cathode plate and the anode plate is calculated by parameters such as the operation condition of the electric pile, the output power, the volume ratio power, the control requirement of the temperature difference in the electric pile and the flow resistance drop of the coolant when flowing through the coolant flow field, and the corresponding area of the coolant outflow channel can be obtained by combining the area ratio of the coolant inflow channel and the coolant outflow channel. Preferably, the coolant flows inThe area of the channel is 5cm 2 ～60cm 2 。
The above-mentioned required inflow/outflow channel areas of the oxidant, the reducing agent, and the coolant are achieved by adjusting the length, width, angle, fillet radius, or relative positions of each channel according to the overall design of the cathode plate and the anode plate.
The shape determination principle of each inflow/outflow channel: the overall design of the bipolar plate is integrated, the shape of each distribution channel is designed and adjusted, and the larger value of the hydraulic diameter of each distribution channel is taken as much as possible, so that the flow resistance drop of the fluid medium in the distribution channel is reduced.
The fuel cell stack may be constructed from the cathode plate, the anode plate, and the membrane electrode assembly described above.
Two methods are used for forming the galvanic pile, one is that a cathode plate and an anode plate are welded into a bipolar plate, as shown in fig. 3, when the two plates are overlapped, an oxidant flow channel 18 and a reducing agent flow channel 19 face outwards, and an oxidant inflow channel 1 on the cathode plate and an oxidant inflow channel 9 on the anode plate are overlapped in the thickness direction of the overlapped plates; the outflow channel 3 of the reducing agent on the cathode plate and the inflow channel 7 of the oxidizing agent on the anode plate are overlapped in the thickness direction of the lamination, then the bipolar plate and the membrane electrode assembly are laminated and are formed by compression fastening, as shown in fig. 5, the fluid distribution channels on the cathode plate and the anode plate form fluid distribution pipelines 20, 21, 22, 23, 24 and 25 inside the electric pile in the thickness direction of the electric pile. The method has the advantages of convenient processing, simple structure and easy deformation and warping of the welded bipolar plate.
The second method for forming the galvanic pile is to sequentially bond a cathode plate, a membrane electrode assembly and an anode plate into a whole to form a single cell, and the galvanic pile is formed by compressing and fastening a plurality of single cells. The method has the advantages of complicated processing process, high requirement on lamination precision of the single polar plate because special resin materials are required to be used as adhesives, high production cost, simple lamination process for stacking the single polar plate and convenient maintenance.
Example 1
In the present embodiment, the area of the oxidant inflow channels on the anode and cathode plates was set to 15cm 2 Oxidant streamThe ratio α of the area of the outlet passage to the area of the oxidant inflow passage was set to 1.5, and the area of the reductant inflow passage was set to 6cm 2 The ratio α of the area of the reducing agent outflow channel to the area of the reducing agent inflow channel was set to 1, and the area of the coolant inflow channel was set to 16cm 2 The area ratio α of the coolant outflow channel to the coolant inflow channel was set to 1.8. The cathode, anode plate and membrane electrode structure constitute 290-section electric pile.
The area of the oxidant inflow channel on the anode plate of the comparative example used was set to 15cm 2 The ratio α of the area of the oxidant outflow channel to the area of the oxidant inflow channel was set to 1/1.5, and the area of the reductant inflow channel was set to 6cm 2 The ratio α of the area of the reducing agent outflow channel to the area of the reducing agent inflow channel was set to 1, and the area of the coolant inflow channel was set to 16cm 2 The area ratio α of the coolant outflow channel to the coolant inflow channel was set to 1/1.8. The cathode, anode plate and membrane electrode structure constitute 290-section electric pile.
Referring to fig. 6 and 7, it can be seen from the drawings that the present invention can significantly improve the difference in the flow rate of the medium dispensed from the respective dispensing passages into the respective cells, compared to the comparative example. Therefore, the invention can uniformly distribute the reaction gas required by the discharge of each battery of the electric pile, reduce the flow difference of three fluids of oxidant, reducing agent and coolant of each single battery in the electric pile, ensure uniform current density distribution, avoid local overheating, and further improve the uniformity of the electrical property output by each battery.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The fuel cell cathode and anode plates with asymmetric structure comprises a cathode plate for distributing oxidant and an anode plate for distributing reducer, wherein the cathode plate and the anode plate are respectively provided with an oxidant inflow channel for flowing in the oxidant, a reducer inflow channel for flowing in the reducer, a coolant inflow channel for flowing in the coolant, an oxidant outflow channel for flowing out the oxidant, a reducer outflow channel for flowing out the reducer, and a coolant outflow channel for flowing out the coolant, the oxidant inflow channel, the reducer inflow channel and the coolant inflow channel on the cathode plate are respectively and completely consistent with the oxidant inflow channel, the reducer inflow channel and the coolant inflow channel on the anode plate, the oxidant outflow channel, the reducer outflow channel and the coolant outflow channel on the cathode plate are respectively and completely consistent with the oxidant outflow channel, the reducer outflow channel and the coolant outflow channel on the anode plate,
the anode plate is of an asymmetric structure and
the area of the oxidant inflow channel on the anode plate is 5cm 2 ～60cm 2 The ratio of the area of the oxidant outflow channel to the area of the oxidant inflow channel is in the range of 1-4;
the area of the reducing agent inflow channel on the anode plate is 2cm 2 ～20cm 2 The ratio of the area of the reducing agent outflow channel to the area of the reducing agent inflow channel ranges from 1 to 4;
the area of the coolant inflow channel on the anode plate is 5cm 2 ～60cm 2 The ratio of the area of the coolant outflow channel to the area of the coolant inflow channel ranges from 1 to 4.
2. The asymmetric structured fuel cell anode and cathode plate of claim 1 wherein the oxidant inflow channels and the reductant inflow channels on the anode and cathode plates are not on the same side of the anode and cathode plates; or the oxidant inflow channel and the reducing agent inflow channel on the cathode plate and the anode plate are positioned on the same side of the cathode plate and the anode plate.
3. The asymmetric structured fuel cell anode and cathode plate of claim 1 wherein the cross-sectional shape of each channel is achieved by adjusting the length, width, angle, fillet radius or relative position of the cross-section.
4. The asymmetric structured fuel cell anode and cathode plate of claim 1, wherein after the area of each channel is determined, the maximum value of the hydraulic diameter of each channel is selected as the optimal shape of each channel.
5. A fuel cell stack of asymmetric structure, characterized by being composed of a fuel cell cathode-anode plate and a membrane electrode assembly of asymmetric structure as claimed in any one of claims 1 to 4.
6. The fuel cell stack according to claim 5, wherein the stack is formed by welding the anode and cathode plates of the fuel cell according to any one of claims 1 to 4 to form a bipolar plate, and then laminating the bipolar plate with the membrane electrode assembly, and compressing and fastening the bipolar plate.
7. The fuel cell stack according to claim 5, wherein the fuel cell stack is formed by bonding the cathode and anode plates of the fuel cell and the membrane electrode assembly according to any one of claims 1 to 4 to form a single cell, and compressing and fastening the plurality of single cells.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711438496.0A CN107968210B (en) | 2017-12-27 | 2017-12-27 | Fuel cell cathode and anode plate with asymmetric structure and electric pile formed by same |
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| CN201711438496.0A CN107968210B (en) | 2017-12-27 | 2017-12-27 | Fuel cell cathode and anode plate with asymmetric structure and electric pile formed by same |
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| CN107968210B true CN107968210B (en) | 2023-11-28 |
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| CN110581288B (en) * | 2018-06-07 | 2021-02-12 | 上海尚理投资有限公司 | Fuel cell stack structure and fuel cell and application thereof |
| FR3092202B1 (en) * | 2019-01-24 | 2021-01-08 | Commissariat Energie Atomique | BIPOLAR PLATE FOR HOMOGENIZING THE COOLANT TEMPERATURES |
| CN110380077B (en) * | 2019-07-26 | 2021-10-01 | 苏州弗尔赛能源科技股份有限公司 | Combined flow passage fuel cell bipolar plate |
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|---|---|---|---|---|
| CN101083335A (en) * | 2006-05-31 | 2007-12-05 | 中国科学院大连化学物理研究所 | Fuel cell unit structure and electric pile assembly |
| CN101098017A (en) * | 2006-06-27 | 2008-01-02 | 上海神力科技有限公司 | Design of inlet and outlet piping of integrated fuel cell stack with convenience to package |
| CN102306805A (en) * | 2011-08-17 | 2012-01-04 | 新源动力股份有限公司 | PEMFC (proton exchange membrane fuel cell) metal bipolar plate conducive to improving fluid distribution |
| JP2014186859A (en) * | 2013-03-22 | 2014-10-02 | Honda Motor Co Ltd | Fuel cell stack and operational method using the same |
| CN205319237U (en) * | 2015-12-29 | 2016-06-15 | 新源动力股份有限公司 | Bipolar plate of fuel battery |
| CN207637904U (en) * | 2017-12-27 | 2018-07-20 | 新源动力股份有限公司 | A kind of fuel cell cathode-anode plate of unsymmetric structure and the pile being made of it |
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| CN107968210A (en) | 2018-04-27 |
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