CN110380077B - Combined flow passage fuel cell bipolar plate - Google Patents
Combined flow passage fuel cell bipolar plate Download PDFInfo
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- CN110380077B CN110380077B CN201910681634.0A CN201910681634A CN110380077B CN 110380077 B CN110380077 B CN 110380077B CN 201910681634 A CN201910681634 A CN 201910681634A CN 110380077 B CN110380077 B CN 110380077B
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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
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
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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
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
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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 application provides a combined flow channel fuel cell bipolar plate, which comprises a cathode unipolar plate, an anode unipolar plate and a membrane electrode arranged between the cathode unipolar plate and the anode unipolar plate, wherein one side of the cathode unipolar plate, which is opposite to the membrane electrode, is provided with an air flow field, the other side of the cathode unipolar plate is provided with a cooling liquid flow field, and the air flow field and the membrane electrode form an air flow channel; the bipolar plate is provided with an air inlet sharing channel communicated with an inlet of the air flow channel, an air outlet sharing channel communicated with an outlet of the air flow channel, a fuel inlet sharing channel communicated with an inlet of the fuel flow channel, a fuel outlet sharing channel communicated with an outlet of the coolant flow channel, a coolant inlet sharing channel communicated with an inlet of the coolant flow channel and a coolant outlet sharing channel communicated with an outlet of the coolant flow channel.
Description
Technical Field
The present application relates to a bipolar plate for a combined flow channel fuel cell.
Background
A fuel cell is an electrochemical reaction device capable of converting chemical energy into electric energy, and is not limited by carnot cycle, and theoretically, has an energy conversion efficiency higher than that of an internal combustion engine (up to 80% or more, generally not lower than 50%), and has many advantages such as zero emission and no mechanical noise, and thus is favored in military and civil fields. Fuel cells can be classified into five types according to the electrolyte used in the fuel cell: alkaline Fuel Cells (AFC), Phosphoric Acid Fuel Cells (PAFC), Molten Carbonate Fuel Cells (MCFC), Solid Oxide Fuel Cells (SOFC) and Proton Exchange Membrane Fuel Cells (PEMFC). The PEMFC adopts a solid polymer membrane as an electrolyte, has the advantages of simple structure, low working temperature, high energy conversion efficiency and the like, and has the advantage of being unique as a mobile power supply. It is reported that PEMFC-powered submarines are developed in germany and france, while PEMFC-powered mass-produced Fuel Cell Electric vehicles (FCEV or FCV) are developed by several world top-grade automobiles such as toyota, japan. As an important mobile power supply, the PEMFC has a good development prospect.
A fuel cell is a chemical device that directly converts chemical energy of fuel into electrical energy, and is also called an electrochemical generator. It is a fourth power generation technology following hydroelectric power generation, thermal power generation and atomic power generation. The fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electric energy through electrochemical reaction, and is not limited by the Carnot cycle effect, so the efficiency is high; in addition, the fuel cell uses fuel and oxygen as raw materials, and has no mechanical transmission parts, so that the fuel cell has no noise pollution and discharges extremely little harmful gas. Fuel cells are well suited for use in transportation, stationary power generation, and portable applications. From the viewpoint of energy saving and ecological environment protection, fuel cells are the most promising power generation technology. In recent years, fuel cells have been actively studied in various countries around the world as a power source and applied to the field of automobiles.
A proton exchange membrane fuel cell (proton exchange membrane fuel cell) is a fuel cell, and corresponds to a "reverse" device for water electrolysis in principle. The single cell consists of an anode, a cathode and a proton exchange membrane, wherein the anode is a place where hydrogen fuel is oxidized, the cathode is a place where an oxidant is reduced, the anode and the cathode both contain catalysts for accelerating electrochemical reaction of the electrodes, the proton exchange membrane is used as a medium for transmitting H +, only H + is allowed to pass, and electrons lost by H2 pass through a lead. When the device works, the device is equivalent to a direct current power supply, wherein the anode is the negative pole of the power supply, and the cathode is the positive pole of the power supply.
Each PEMFC cell is composed of two plates (an anode plate and a cathode plate) and a membrane electrode sandwiched between the two plates. The membrane electrode is formed by assembling an anode catalyst, a proton exchange membrane and a cathode catalyst together. Gas Diffusion Layers (GDLs), which are typically made of gas-permeable carbon paper or carbon cloth, are also typically provided between the anode and membrane electrodes and between the membrane and cathode plates, some of which incorporate the gas diffusion layers as part of the membrane electrode and some of which incorporate the gas diffusion layers as a separate component in the PEMFC. The anode plate of the PEMFC is provided with a fuel flow channel, which is a place where a fuel (an energetic compound such as hydrogen or methanol existing in a gas or liquid form at normal temperature and pressure) flows and is transported, and the fuel is transported therethrough to the anode catalyst. The cathode plate of the PEMFC is provided with an oxidant flow channel, which is a place where an oxidant (typically oxygen or air) flows and is transferred, through which the oxidant reaches the cathode catalyst. By means of the fuel flow passage and the oxidant flow passage, the fuel and the oxidant can be supplied into the fuel cell continuously so that the fuel cell can output electric power continuously.
A typical water-cooled proton exchange membrane fuel cell consists of a cathode flow field plate, a membrane electrode, and an anode flow field plate, where the membrane electrode is generally placed between two conductive flow field plates, and the flow field plates serve as both current collector plates and mechanical supports for the membrane electrode. The flow channels on the flow field plate provide channels for fuel, oxidant and cooling water to enter the anode and the cathode and cool the reaction, and also provide channels for taking away water generated in the operation process of the fuel cell.
Disclosure of Invention
The technical problem to be solved by the application is to provide a bipolar plate of a combined flow channel fuel cell.
In order to solve the technical problems, the application provides a bipolar plate of a combined flow channel fuel cell, which comprises a cathode unipolar plate, an anode unipolar plate and a membrane electrode arranged between the cathode unipolar plate and the anode unipolar plate, wherein an air flow field is arranged on one side of the cathode unipolar plate, which is opposite to the membrane electrode, and a cooling liquid flow field is arranged on the other side of the cathode unipolar plate, and the air flow field and the membrane electrode form an air flow channel; the bipolar plate is provided with an air inlet sharing channel communicated with an inlet of the air flow channel, an air outlet sharing channel communicated with an outlet of the air flow channel, a fuel inlet sharing channel communicated with an inlet of the fuel flow channel, a fuel outlet sharing channel communicated with an outlet of the fuel flow channel, a cooling liquid inlet sharing channel communicated with an inlet of the cooling liquid flow channel and a cooling liquid outlet sharing channel communicated with an outlet of the cooling liquid flow channel, the fuel outlet sharing channel is provided with a first inclined plane which is obliquely arranged, and water drops in the fuel outlet sharing channel can slide to the bottom of the fuel outlet sharing channel along the first inclined plane; the air outlet sharing channel is provided with a second inclined surface which is obliquely arranged, and water drops in the air outlet sharing channel can slide to the bottom of the air outlet sharing channel along the second inclined surface.
Preferably, the fuel outlet sharing channel is provided with a first inclined groove part, the first inclined groove part comprises the first inclined surface, and the section of the first inclined groove part is gradually narrowed from top to bottom.
Preferably, the second inclined surface is a bottom surface of the air outlet sharing channel.
Preferably, the air flow field comprises two or more air sub-flow fields, and the inlet and the outlet of each air sub-flow field respectively correspond to one air inlet shared channel and one air outlet shared channel; or/and the fuel flow field comprises two or more fuel sub-flow fields, and the inlet and the outlet of each fuel sub-flow field respectively correspond to a fuel inlet sharing channel and a fuel outlet sharing channel; or/and the cooling liquid flow field comprises two or more cooling liquid sub-flow fields, and the inlet and the outlet of the cooling liquid sub-flow field respectively correspond to a cooling liquid inlet sharing channel and a cooling liquid outlet sharing channel.
Preferably, an air inlet distribution flow channel, an air outlet distribution flow channel and a fuel inlet distribution flow channel are arranged on the cooling liquid side of the cathode unipolar plate, air flows in from the air inlet shared channel, enters the air flow channel through the air inlet distribution flow channel, flows out through the air outlet distribution flow channel after flowing through each air sub-flow field respectively, and is discharged after being converged to the air outlet shared channel.
Preferably, a fuel outlet distribution channel is arranged on the cooling liquid side of the cathode unipolar plate, and the gas fuel flows in from the fuel inlet shared channel, enters the fuel channel through the fuel inlet distribution channel, flows through the fuel flow field, flows out through the fuel outlet distribution channel, and is collected to the fuel outlet shared channel to be discharged.
Preferably, the cathode unipolar plate, the anode unipolar plate and the four sides of the membrane electrode of the bipolar plate are provided with fixing rod through holes, and the bipolar plate is fastened and fixed by the fixing rods penetrating through the fixing rod through holes of the bipolar plate.
Preferably, the air inlet shared channel is disposed at an upper portion of the bipolar plate, the air outlet shared channel is disposed at a lower portion of the bipolar plate, the fuel inlet shared channel is disposed at an upper portion of a right side of the bipolar plate, the fuel outlet shared channel is disposed at a lower portion of a left side of the bipolar plate, the coolant inlet shared channel is disposed at an upper portion of a left side of the bipolar plate, and the coolant outlet shared channel is disposed at a lower portion of a right side of the bipolar plate.
Preferably, the air flow passage and/or the fuel flow passage are/is a gradual flow passage, and the gradual change or the smooth gradual change is performed from the inlet to the outlet of the flow passage.
According to the bipolar plate of the combined flow channel fuel cell, the fuel outlet sharing channel and the air outlet sharing channel are designed by the inclined grooves, and compared with the traditional rectangular design, the design scheme of the bipolar plate is beneficial to collecting and discharging water. The combined flow channel design shortens the flowing distance of gas, so that the flow channels of fuel and air are easier to distribute, the integral flowing uniformity is improved, and the processing difficulty of the flow channels is reduced.
Drawings
FIG. 1 is a schematic view of a bipolar plate structure of a combined flow channel fuel cell according to the present invention;
FIG. 2 is a schematic view of the air-side structure of a cathode unipolar plate according to the present invention;
FIG. 3 is a schematic view of the coolant side structure of the cathode unipolar plate of the present invention;
fig. 4 is a schematic diagram of the fuel side structure of the anode unipolar plate of the present invention.
FIG. 5 is a schematic structural diagram of the air flow channel of the present application with a smoothly changing width;
FIG. 6 is a schematic view of the air flow passage of the present application showing a stepped width transition;
FIG. 7 is a schematic view of the present application showing a smoothly graded depth air flow channel;
FIG. 8 is a schematic view of the stepped depth configuration of the air flow passages of the present application;
FIG. 9 is a schematic view of the stepped depth and width transition of the air flow passages of the present application;
fig. 10 is a schematic view of the structure in which the depth and width of the air flow channel of the present application are smoothly gradually changed.
Detailed Description
The present application is further described below in conjunction with the following figures and specific examples to enable those skilled in the art to better understand the present application and to practice it, but the examples are not intended to limit the present application.
Referring to fig. 1, the bipolar plate of the combined flow channel fuel cell of the present invention is composed of a cathode unipolar plate 1 and an anode unipolar plate 3, and a membrane electrode 2 sandwiched between the two unipolar plates; wherein, one side of the cathode unipolar plate 1 is provided with a cooling liquid flow field, the other side is provided with an air flow field, one side of the anode unipolar plate 3 is provided with a fuel flow field, and the other side is a smooth plane; the air side flow field of the cathode unipolar plate 1 and the membrane electrode form an air flow channel, and the fuel side flow field of the anode unipolar plate 3 and the membrane electrode form a fuel flow channel; the cathode unipolar plate 1, the membrane electrode 2 and the anode unipolar plate 3 are connected through a sealing ring in an adhesive manner to form a bipolar plate; the cooling liquid side flow field of the bipolar plate is spliced with the smooth side of the other bipolar plate to form a cooling liquid flow channel, and the fuel cell stack is formed by splicing a plurality of bipolar plates.
Referring to fig. 2, the air side of the cathode unipolar plate 1 of the present invention is divided into air inlet shared channels 104, 105, 107, 108, air outlet shared channels 113, 114, 116, 117, a fuel inlet shared channel 101, a fuel outlet shared channel 111, a coolant inlet shared channel 109, a coolant outlet shared channel 118, two side positioning holes 102, 112, four fixing rod through holes 106, 110, 115, 119, an air side seal ring groove 103, and 4 independent air sub-flow fields a1, a2, A3, a 4.
Referring to fig. 3, the coolant side of the cathode unipolar plate 1 is provided with air inlet distribution channels 120, 121, 123, 124, air outlet distribution channels 126, 127, 128, 129, fuel inlet distribution channels 125, fuel outlet distribution channels 130, a coolant flow field B, and a coolant side gasket groove 122.
Referring to fig. 4, the fuel side of the anode unipolar plate is provided with air inlet shared channels 302, 303, 305, 306, air outlet shared channels 311, 312, 314, 315, a fuel inlet shared channel 308, a fuel outlet shared channel 317, a coolant inlet shared channel 319, a coolant outlet shared channel 310, positioning holes 307, 316 on both sides, fixing rod through holes 304, 309, 313, 318 on the periphery, a fuel side seal ring groove 301, and a fuel side flow field C.
Referring to fig. 1, 2, 3, 4, each shared channel is formed by splicing a plurality of bipolar plates to uniformly distribute fluid to a single bipolar plate, and each inlet shared channel is arranged above each outlet shared channel; when the bipolar plates are installed, the bipolar plates are positioned and installed through the positioning holes, and the fixing rods penetrate through the fixing rod through holes of the bipolar plates to fasten and fix the bipolar plates.
Referring to fig. 2 and 3, the air flow process is as follows: air flows in from the air inlet shared channels 104, 105, 107 and 108, enters the air flow channels of the single bipolar plates through the air inlet distribution flow channels 120, 121, 123 and 124, flows through each of the sub-flow fields A1, A2, A3 and A4, flows out through the air outlet distribution flow channels 126, 127, 128 and 129, is collected in the air outlet shared channels 113, 114, 116 and 117, and is exhausted. The flowing process of the cooling liquid is as follows: the cooling liquid flows in from the cooling liquid inlet shared channel 109 and directly enters the cooling liquid flow field region B, and is collected in the cooling liquid outlet shared channel 118 and discharged.
Referring to fig. 3 and 4, the flow process of the fuel is as follows: the gas fuel flows in from the fuel inlet shared channel 308, enters the fuel flow channels of the single bipolar plate through the fuel inlet distribution flow channels 125, flows through the fuel flow field C, flows out through the fuel outlet distribution flow channels, and is collected to the fuel outlet shared channel 317 to be discharged.
Referring to fig. 2 and 4, the fuel outlet sharing channel section and the air outlet sharing channel adopt a chute design, compared with a conventional rectangular design, the chute design is beneficial to water drops adsorbed on the wall surface to converge to the bottom of the chute under the action of gravity, so that water collection is facilitated, and water discharge is further facilitated.
The chute design of the application means that the lower end of the fuel outlet sharing channel is provided with a first chute part, the section of the first chute part is gradually narrowed from top to bottom, as shown in fig. 2 and 4, the fuel outlet sharing channel is provided with a first inclined surface, and water drops adsorbed on the first inclined surface can slide down to the bottom of the first chute along the first inclined surface.
As shown in fig. 2 and 4, the bottom edge of the air outlet sharing channel is a second inclined surface, and water drops adsorbed on the second inclined surface can slide down to the bottom of the air outlet sharing channel.
Referring to fig. 2, the air-side flow channel of the cathode unipolar plate 1 adopts a combined flow channel design, that is, the air-side flow field is divided into 4 independent sub-flow fields a1, a2, A3 and a4, and each sub-flow field shares a channel by a separate inlet and outlet; compared with the traditional mode of sharing the channel by a single inlet and outlet and designing a single flow field, the combined flow channel divides one flow field into a plurality of independent sub-flow fields, which is beneficial to improving the uniformity of flow distribution, thereby improving the output stability of the fuel cell.
Furthermore, the combined flow channel is not limited to the four sub-flow field design shown in FIG. 2, but can be designed into n (n ≧ 2) mutually independent sub-flow fields and n independent shared channel inlets and outlets.
Furthermore, since n (n is greater than or equal to 2) sub-flow fields are independent from each other and do not interfere with each other, each sub-flow field can be designed independently, the sub-flow field structure includes but is not limited to the serpentine channel shown in fig. 2, the size of the inlet and outlet of each sub-flow field and the size of the inlet and outlet cross section of the shared channel are designed according to the requirements of actual sub-flow field flow, heat dissipation, flow uniformity, drainage and back pressure, and the size of the inlet and outlet of each sub-flow field, the size of the shared channel cross section and the sub-flow field flow channel structure can be designed independently according to the actual design requirements.
Furthermore, the design method for dividing one flow field area into n (n is more than or equal to 2) independent sub-flow fields is also suitable for designing a cooling liquid flow field and a fuel flow field of the fuel cell.
The air flow channel and the fuel flow channel are gradual change channels, and step gradual change or smooth gradual change is carried out from the inlet to the outlet of the flow channel. Taking the air flow passage as an example for detailed description, the cross-sectional area of the air flow passage from the air inlet to the air outlet is gradually reduced:
the first embodiment is as follows: as shown in fig. 5, the width of the air flow channel is smoothly gradually changed;
example two: as shown in fig. 6, is a stepwise gradual change in the width of the air flow passage;
example three: as shown in fig. 7, is a smooth gradual change in the depth of the air flow channel;
example four: as shown in fig. 8, a step-wise progression of the depth of the air flow channel;
example five: as shown in fig. 9, the depth and width of the air flow channel are graded in steps;
example six: as shown in fig. 10, the depth and width of the air flow channel are smoothly gradually changed;
example seven: the air flow channel is characterized in that the groove depth is smoothly and gradually changed, and the groove width is gradually changed in a step manner (not shown in the figure);
example eight: the air flow is gradually changed to a groove depth step, and the groove width is smoothly changed (not shown in the figure).
In this application, the depth direction of the flow channel is perpendicular to the bipolar plate surface, and the width direction of the flow channel is perpendicular to the length direction of the flow channel and parallel to the direction of the bipolar plate surface.
Compared with the prior art, the invention has the advantages that:
1. the fuel outlet sharing channel and the air outlet sharing channel adopt a chute design, and compared with a traditional rectangular design, the design scheme of the invention is beneficial to collecting and discharging water.
2. The combined flow channel design shortens the flowing distance of gas, so that the flow channels of fuel and air are easier to distribute, the integral flowing uniformity is improved, and the processing difficulty of the flow channels is reduced.
The above-described embodiments are merely preferred embodiments for fully illustrating the present application, and the scope of the present application is not limited thereto. The equivalent substitution or change made by the person skilled in the art on the basis of the present application is within the protection scope of the present application. The protection scope of this application is subject to the claims.
Claims (7)
1. The bipolar plate of the combined flow channel fuel cell is characterized by comprising a cathode unipolar plate and an anode unipolar plate
The air flow field and the membrane electrode form an air flow channel; the bipolar plate is provided with an air inlet sharing channel communicated with an inlet of the air flow channel, an air outlet sharing channel communicated with an outlet of the air flow channel, a fuel inlet sharing channel communicated with an inlet of the fuel flow channel, a fuel outlet sharing channel communicated with an outlet of the fuel flow channel, a cooling liquid inlet sharing channel communicated with an inlet of the cooling liquid flow channel and a cooling liquid outlet sharing channel communicated with an outlet of the cooling liquid flow channel, the fuel outlet sharing channel is provided with a first inclined plane which is obliquely arranged, and water drops in the fuel outlet sharing channel can slide to the bottom of the fuel outlet sharing channel along the first inclined plane; the air outlet sharing channel is provided with a second inclined surface which is obliquely arranged, and water drops in the air outlet sharing channel can slide to the bottom of the air outlet sharing channel along the second inclined surface;
the four sides of the cathode unipolar plate, the anode unipolar plate and the membrane electrode of the bipolar plate are provided with fixing rod through holes, the bipolar plate is fastened and fixed by the fixing rods penetrating through the fixing rod through holes of the bipolar plate, each of the air side seal ring groove, the cooling liquid side seal ring groove and the fuel side seal ring groove comprises a plurality of inner concave sections which are respectively positioned at a plurality of circumferential positions, and the fixing rod through holes are embedded at the outer sides of the inner concave sections;
the air inlet shared channel is arranged at the upper part of the bipolar plate, the air outlet shared channel is arranged at the lower part of the bipolar plate, the fuel inlet shared channel is arranged at the upper part of the right side of the bipolar plate, the fuel outlet shared channel is arranged at the lower part of the left side of the bipolar plate, the cooling liquid inlet shared channel is arranged at the upper part of the left side of the bipolar plate, and the cooling liquid outlet shared channel is arranged at the lower part of the right side of the bipolar plate.
2. The bipolar plate of a combined flow channel fuel cell of claim 1, wherein said fuel outlet is formed on said bipolar plate
The sharing channel is provided with a first inclined groove part, the first inclined groove part comprises the first inclined surface, and the section of the first inclined groove part is gradually narrowed from top to bottom.
3. The bipolar plate of a combined flow channel fuel cell of claim 1, wherein said second chamfer is formed on a second side of said bipolar plate
The air outlets share the bottom surface of the channel.
4. The bipolar plate of a combined flow channel fuel cell of claim 1, wherein said air flow field
The air flow field comprises two or more air sub-flow fields, and the inlet and the outlet of each air sub-flow field correspond to one air inlet
A port-sharing channel and an air outlet-sharing channel; or/and the fuel flow field comprises two or more fuel sub-flow fields, and the inlet and the outlet of each fuel sub-flow field respectively correspond to a fuel inlet sharing channel and a fuel outlet sharing channel; or/and the cooling liquid flow field comprises two or more cooling liquid sub-flow fields, and the inlet and the outlet of the cooling liquid sub-flow field respectively correspond to a cooling liquid inlet sharing channel and a cooling liquid outlet sharing channel.
5. The bipolar plate of a combined flow channel fuel cell of claim 4, wherein said cathodic monopolar is present
The cooling liquid side of the plate is provided with an air inlet distribution flow passage, an air outlet distribution flow passage, a fuel inlet distribution flow passage, and air inlet distribution flow passages
The air flows into the inlet sharing channel, enters the air flow channel through the air inlet distribution flow channel, and respectively flows through each air sub-flow field
Flows out through the air outlet distribution flow passage, is collected to the air outlet sharing passage and is discharged.
6. The bipolar plate of a combined flow channel fuel cell of claim 1, wherein said cathodic monopolar is present
The cooling liquid side of the plate is provided with a fuel outlet distribution flow passage, and gas fuel flows in from a fuel inlet sharing channel and passes through a fuel inlet
The distribution flow channel enters the fuel flow channel, flows through the fuel flow field, flows out through the fuel outlet distribution flow channel, and is converged to the fuel outlet
And (4) discharging through the shared channel.
7. The bipolar plate of a combined flow channel fuel cell of claim 1, wherein said air flow channel
Or/and the fuel flow passage is a gradual change flow passage, and the gradual change or the smooth gradual change is carried out from the inlet to the outlet of the flow passage in a stepped mode.
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| CN201910681634.0A CN110380077B (en) | 2019-07-26 | 2019-07-26 | Combined flow passage fuel cell bipolar plate |
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| CN201910681634.0A CN110380077B (en) | 2019-07-26 | 2019-07-26 | Combined flow passage fuel cell bipolar plate |
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| CN115714186A (en) * | 2022-10-21 | 2023-02-24 | 上海空间电源研究所 | Variable cross-section series parallel flow channel flow field plate, bipolar plate and fuel cell stack |
| CN117727989B (en) * | 2024-02-07 | 2024-07-09 | 浙江海盐力源环保科技股份有限公司 | High performance fuel cell |
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| CN109904484A (en) * | 2019-03-01 | 2019-06-18 | 山东大学 | A kind of fuel cell bipolar plate structure and fuel cell |
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| WO2015048900A1 (en) * | 2013-10-02 | 2015-04-09 | Hydrogenics Corporation | Fuel cell sub-assembly and method of making it |
| CN209001023U (en) * | 2018-12-13 | 2019-06-18 | 新源动力股份有限公司 | A kind of fuel battery double plates with intermittent configuration |
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| CN101373844A (en) * | 2007-08-20 | 2009-02-25 | 中强光电股份有限公司 | Fuel cell |
| CN107968210A (en) * | 2017-12-27 | 2018-04-27 | 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 |
| CN208767398U (en) * | 2018-09-18 | 2019-04-19 | 上海一耐动力系统有限公司 | A kind of fuel battery double plates |
| CN109802155A (en) * | 2018-12-22 | 2019-05-24 | 一汽解放汽车有限公司 | A kind of bipolar plates and processing method advantageously reducing the loss of fuel cell concentration difference |
| CN109904484A (en) * | 2019-03-01 | 2019-06-18 | 山东大学 | A kind of fuel cell bipolar plate structure and fuel cell |
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