CN110828844A - High-performance proton exchange membrane fuel cell cathode and anode flow field and bipolar plate thereof - Google Patents
High-performance proton exchange membrane fuel cell cathode and anode flow field and bipolar plate thereof Download PDFInfo
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- CN110828844A CN110828844A CN201911150601.XA CN201911150601A CN110828844A CN 110828844 A CN110828844 A CN 110828844A CN 201911150601 A CN201911150601 A CN 201911150601A CN 110828844 A CN110828844 A CN 110828844A
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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
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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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
A high-performance proton exchange membrane fuel cell cathode and anode flow field and its bipolar plate, punch and press and get the flow field structure of the straight negative pole flow field of the fold type (17) and snake type anode flow field (27) on the negative plate (1) and anode plate (2) separately, adopt the flow field design of the non-distribution area, the gas is distributed on the whole inlet and outlet pipeline of flow field through the public pipeline, namely the gas enters the flow field area directly from the public pipeline of polar plate, fluid channel, reduce the public pipeline and channel resistance to drop; the matching of the water cavity inlet and outlet and the cathode and anode water flow fields is designed at the sides of the cathode flow field and the anode flow field, so that the fluid resistance of the water cavity is reduced, the cooling water is uniformly distributed in the water cavity, no cooling dead angle exists, and the battery thermal management is facilitated. The metal bipolar plate sealing structure and the channel are formed by liquid silica gel injection molding, the silica gel sealing structure of the bipolar plate is compressed by adopting the pile assembling force to realize elastic sealing, the sealing effect is stable and reliable, and the metal bipolar plate with uniform fluid distribution, controllable fluid resistance, low manufacturing cost and reliable performance is obtained.
Description
Technical Field
The invention relates to an improved technology of a proton exchange membrane fuel cell, in particular to a cathode and anode flow field of a high-performance proton exchange membrane fuel cell and a bipolar plate thereof.
Background
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. Since the proton exchange membrane can only conduct protons, hydrogen ions (i.e., protons) can pass directly through the proton exchange membrane to the cathode, while electrons can only reach the cathode through an external circuit. Direct current is generated when electrons flow through an external circuit to the cathode. When the anode is taken as a reference, the cathode potential is 1.23V. That is, the theoretical upper limit of the generated voltage of each unit cell is 1.23V. The output voltage depends on the output current density when the load is connected, and is usually between 0.5 and 1V. A fuel cell stack (simply referred to as a stack) having an output voltage satisfying the actual load requirement can be formed by stacking and combining a plurality of single cells. The electric pile is formed by stacking and combining a plurality of single batteries in a series connection mode. The bipolar plates and the membrane electrode three-in-one components (MEA) are overlapped alternately, sealing elements are embedded between the monomers, and the monomers are tightly pressed by the front end plate and the rear end plate and then fastened and fastened by screws, so that the proton exchange membrane fuel cell stack is formed. The stacking is carried out while ensuring that the gas main channels are aligned so that hydrogen and oxygen can smoothly reach each cell. When the electric pile works, hydrogen and oxygen are respectively introduced from the inlet, distributed to the bipolar plates of the monocells through the main gas channel of the electric pile, uniformly distributed to the electrodes through the diversion of the bipolar plates, and contacted with the catalyst through the electrode support body to carry out electrochemical reaction. The heart of the stack is the MEA assembly and the bipolar plates. The MEA is prepared by respectively placing two carbon fiber paper electrodes sprayed with Nafion solution and Pt catalyst on two sides of a pretreated proton exchange membrane to make the catalyst close to the proton exchange membrane, and pressing at a certain temperature and pressure. The gas introduced by the cathode and the anode are respectively arranged on two sides of the MEA, a certain pressure difference exists between the gas input on the two sides according to the reaction condition of the battery, the gas flow of the cathode and the anode also has the pressure difference during the reaction of the battery, and the gas permeation and the mechanical deformation of the MEA can be generated by the MEA due to the pressure difference, so the MEA has strict requirements on the gas flow on the two sides; the bipolar plate is a device for leading in and discharging cathode and anode gases and cooling media, and is also a conductor for battery series connection and electric energy output, and a cathode and anode flow field and a water flow field are processed on the bipolar plate, and comprise a common pipeline, a channel, a flow field structure and auxiliary structures such as routing inspection, positioning and the like. The design of the cathode and anode flow field plays an important role in the performance and service life of the battery. The selection of the bipolar plate processing process route has an important influence on the cost of the proton exchange membrane fuel cell stack.
A high performance PEM fuel cell is one with a high current density output, i.e., a current density of 2.5A/cm in the usual case2The above. In a state of high current density output, large flow of air is required to be input, however, the large flow of air generates fluid resistance in the battery, so that the cathode and anode gas pressure difference is difficult to match, and further, the performance of the battery is limited.
Disclosure of Invention
The invention aims to provide a high-performance proton exchange membrane fuel cell cathode and anode flow field and a bipolar plate thereof, wherein a novel metal bipolar plate is manufactured by innovatively designing the cathode and anode flow field and a water coolant flow field and optimizing the mutual sealing structure of a cathode cavity and an anode cavity and a coolant cavity, and the technical problems and the manufacturing cost problems are solved.
The aim of the invention is achieved by the following technical measures: the metal bipolar plate comprises a cathode plate and an anode plate, a folded straight-going cathode flow field and a snake-shaped anode flow field structure are obtained by stamping the cathode plate and the anode plate respectively, the two flow fields are respectively positioned at the central position of the surface of the cathode plate, the cathode plate and the anode plate are respectively provided with an upper surface and a lower surface, and the two surfaces are respectively a gas cavity side and a coolant cavity side; punching a hole at the frame part of the metal bipolar plate to obtain a common pipeline of the metal bipolar plate, wherein the common pipeline comprises a cathode gas common pipeline and an anode gas common pipeline of air and hydrogen of the metal bipolar plate, and a cathode water common pipeline, a cathode common pipeline, an anode common pipeline and an anode water common pipeline; the metal bipolar plate sealing structure and the channel are formed by liquid silica gel injection molding and are respectively completed by one-time injection on the two sides of the cathode plate and the anode plate.
Particularly, the folded straight-going cathode flow field comprises a cathode flow field straight-going section positioned at the inlet end and the outlet end of the flow field, a folded section positioned between the inlet end and the outlet end, and cathode flow field edge sections positioned at two side edges of the inlet end and the outlet end of the flow field; wherein, two ends of the folded section are respectively communicated with a group of cathode flow field straight sections, two sides of the folded section are respectively communicated with a group of cathode flow field edge sections, the inner side of the cathode flow field edge section is a folded edge, and the outer side of the cathode flow field edge section is a straight edge; the serpentine anode flow field comprises an anode flow field inlet end edge channel, an anode flow field outlet end edge channel and a serpentine coil channel communicated with the anode flow field inlet end edge channel and the anode flow field outlet end edge channel.
Particularly, a glue penetrating hole is processed outside the sealing structure of the cathode plate and the anode plate, and the double-sided silica gel of the metal bipolar plate is communicated into a whole after the silica gel injection is finished.
In particular, the metal bipolar plate cathode cavity, the metal bipolar plate anode cavity and the metal bipolar plate coolant cavity are integrally and respectively sealed in a sealing ring formed by injecting silica gel.
Particularly, a cathode gas common pipeline, an anode gas common pipeline, a cathode water common pipeline of a cathode plate of the metal bipolar plate and silica gel injected on the periphery of a flow field are used for obtaining an air cavity side air cavity sealing silica gel strip and a water cavity side water cavity sealing rubber strip, a sealing ring is processed between the sealing of the common pipeline and a cathode cavity and a water cavity except for a circle of sealing rubber strip of the common pipeline, namely the air cavity side air cavity sealing silica gel strip or the air cavity side water cavity double-layer sealing rubber strip, when cathode gas enters and is led out of the air cavity, a cathode side air channel rubber strip and a water cavity side air channel rubber strip are formed on the air cavity and a water cavity side second layer sealing ring in a cutting mode, cathode gas channel holes are processed on a polar plate between the channel strips, and the gas is led into or led out of the cathode gas channel of the metal bipolar plate through the water cavity side channels of the common.
Particularly, silica gel is injected into a cathode common pipeline, an anode common pipeline and a water common pipeline of an anode plate of the metal bipolar plate and the periphery of a flow field to obtain a gas cavity side gas cavity sealing silica gel strip and a water cavity side water cavity sealing rubber strip; a sealing ring is processed between the sealing of the public pipeline and the anode cavity and the water cavity besides a circle of sealing rubber strip of the public pipeline, namely a sealing rubber strip of the air cavity side air cavity or a double-layer sealing rubber strip of the air cavity side water cavity.
Particularly, the back sides of the air cavity sides of a cathode plate and an anode plate of the metal bipolar plate are overlapped, and silica gel is injected at the periphery of a public pipeline and a flow field for sealing to obtain a water cavity of the bipolar plate; cutting a sealing ring entering a water flow field at the side of the water cavity to form spaced water cavity channel rubber strips, wherein the channel rubber strips on the sealing ring extend to the edge channels of the flow field of the cathode plate and the anode plate; the integrated injection molding, the water cavity side channel adhesive tape is designed to have one end as a blind end and one end as a channel, and comprises an inlet end channel strip with water on the negative plate, a channel outlet is a blind end, an outlet end channel strip with water entering a snake-shaped anode flow field is arranged on the positive plate, a channel inlet is a blind end, or the anode plate is provided with an inlet end channel strip with water, the channel outlet is a blind end, the negative plate is provided with an outlet end channel strip with water entering the snake-shaped anode flow field, and the channel inlet is a blind end.
Particularly, the cooling water inlet and outlet sections are distributed and collected in the edge section of the cathode flow field, the edge channel of the anode flow field inlet end and the edge channel of the anode flow field outlet end; the straight section of the cathode side flow field is lapped on the edge channel of the inlet end of the anode flow field and the edge channel of the outlet end of the anode flow field.
The invention has the advantages and effects that: the design of a flow field without a distribution area is adopted, a gas public pipeline is distributed on the whole inlet and outlet pipeline of the flow field, gas directly enters the flow field area from a polar plate public pipeline and is conveyed according to the pipeline designed by the flow field, the public pipeline is widened, the resistance drop of the public pipeline and a channel is reduced, and the resistance drop caused by gas conveying is completely used in a battery power generation area due to the fact that the distribution area is absent, and the efficiency of the air compressor is improved. The metal polar plate only punches the flow field and the hole, so that the structure of a punching die is simplified, and the polar plate punching quality is high; meanwhile, the elastic sealing is realized by compressing the silica gel sealing structure of the bipolar plate by adopting the galvanic pile assembling force, the sealing effect is stable and reliable, the utilization rate of raw materials for manufacturing the sealing rubber strip is high, the manufacturing process of the silica gel sealing element is simple, the quality is easy to guarantee, the manufacturing process is improved, and the low-cost batch production is convenient to realize.
Drawings
Fig. 1 is a schematic diagram of a structure of a cathode punching plate in embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of an anode stamping plate structure in embodiment 1 of the present invention.
Fig. 3A and 3B are schematic structural views of two side surfaces of the cathode plate in embodiment 1 of the present invention.
Fig. 4 is a schematic cross-sectional view of the cathode plate a-a in fig. 3B.
Fig. 5A and 5B are schematic diagrams of two side structures of an anode plate in embodiment 1 of the present invention.
Fig. 6 is a schematic structural view of a bipolar plate water chamber in example 1 of the present invention.
Fig. 7 is a schematic cross-sectional view of the bipolar plate water flow channel B-B of fig. 6.
The reference numerals include:
in fig. 1:
1-a cathode plate, 11-a cathode gas common pipeline, 12-an anode gas common pipeline, 13-a cathode water common pipeline, 14-a positioning hole, 15-a glue permeating hole, 16-a cathode gas channel hole, 17-a folded straight cathode flow field, 18-a cathode flow field straight section and 19-a cathode flow field edge section;
in fig. 2:
2-anode plate, 21-cathode common pipe, 22-anode common pipe, 23-anode water common pipe, 24-anode gas channel hole, 25-anode flow field inlet end edge channel, 26-anode flow field outlet end edge channel and 27-snake-shaped anode flow field;
in fig. 3:
100A-air cavity side air cavity sealing silica gel strip, 102A-air cavity side water cavity double-layer sealing rubber strip, 103A-air cavity side hydrogen cavity double-layer sealing rubber strip, 1001A-water cavity side air cavity channel rubber strip, 100B-water cavity side water cavity sealing rubber strip, 1001B-water cavity side air cavity channel rubber strip, 1002B-water cavity side water cavity channel rubber strip and 1003B-inlet end water channel strip;
in fig. 5:
200A-air cavity side air cavity sealing silica gel strip, 202A-air cavity side water cavity double-layer sealing rubber strip, 203A-air cavity side hydrogen cavity double-layer sealing rubber strip, 2001A-air cavity side air cavity sealing silica gel strip, 200B-water cavity side water cavity sealing rubber strip and 2001B-water cavity side air cavity channel rubber strip; 2002B-water cavity side water cavity channel adhesive tape, 2003B-outlet end channel strip.
Detailed Description
The principle of the invention lies in that two methods are used for reducing the fluid resistance in the flow field, one is to increase the pressure at the inlet end of the flow field, and the other is to design a reasonable flow field structure; the research of the invention finds that the flow field structure design needs to meet the requirements of fuel cell reaction environment and material transportation on one hand and the requirement of fuel cell electric energy output on the other hand; meanwhile, the requirements of fuel cell reaction and electric energy output are met, and the matching relationship between the cathode flow field and the anode flow field and the cooling flow field needs to be adjusted.
In the invention, the folded straight-going cathode flow field 17 of the metal bipolar plate adopts a folded straight-going flow field, gas is directly led into the folded straight-going cathode flow field 17 from a common pipeline and is directly led out of the metal bipolar plate, the gas distribution is uniform, the flow rate is controllable, and the fluid resistance is small. Meanwhile, the snake-shaped anode flow field 27 of the metal bipolar plate adopts a snake-shaped flow field, gas is directly led into the snake-shaped anode flow field 27 from a common pipeline and is directly led out of the bipolar plate, the gas distribution is uniform, the flow rate is controllable, and the fluid resistance can be accurately controlled.
In the invention, according to the water cavity water flow field structure of the metal bipolar plate, water enters the folded straight cathode flow field 17 and the snake-shaped anode flow field 27 from the cathode water common pipeline 13 and the anode water common pipeline 23, one way is that the water can be circulated by the intersection of the cathode flow field edge section 19 at the water cavity side of the cathode plate 1 and the snake-shaped anode flow field 27 of the anode plate 2, the other way is that an anode flow field edge channel 25 is processed at the outer side of the snake-shaped anode flow field 27 of the anode plate 2, water enters the channel, flows into the cathode flow field straight section 18 overlapped by the folded straight cathode flow field 17 of the cathode plate 1 and the anode flow field edge channel 25 from the inlet end, enters the water cavity flow field, then is converged into the cathode flow field straight section 18 overlapped by the folded straight cathode flow field 17 at the outlet end of the cathode plate 1 and the anode flow field edge channel 26, and reaches the anode outlet end edge 26 at the edge of the snake-shaped anode flow, flows out to the cathode water common pipe 13 and the anode water common pipe 23. The water flow modes in the two ways reduce the fluid resistance of the water cavity, and the cooling water is uniformly distributed in the water cavity without cooling dead angles, thereby being beneficial to the thermal management of the battery.
The invention is further illustrated by the following figures and examples.
Example (b): as shown in fig. 1 to 7, the polar plate, that is, the metal bipolar plate, includes a cathode plate 1 and an anode plate 2, the polar plate is rectangular with irregular edges, the length is 350-; fig. 1 and 2 show the gas chamber sides of a cathode plate 1 and an anode plate 2; on the polar plate frame outside the flow field of the cathode plate 1 and the anode plate 2, the surfaces of the polar plate gas cavity side and the coolant cavity side respectively protrude the upper surface and the lower surface of the polar plate frame, the protruding height is designed according to the compression characteristic of the membrane electrode of the proton exchange membrane fuel cell and the compression characteristic requirement of silica gel for sealing, and the common pipeline of the metal bipolar plate is obtained by punching the polar plate frame part, and comprises a cathode gas common pipeline 11 and an anode gas common pipeline 12 of air and hydrogen of the metal bipolar plate, a cathode water common pipeline 13 and an anode water common pipeline 23.
In the foregoing, the metal bipolar plate sealing structure and the channel are injection-molded by liquid silica gel, and are respectively completed by one-time injection on the two sides of the cathode plate 1 and the anode plate 2; in order to fix the structure formed by injecting the silica gel and the position of the polar plate, further, a permeable hole 15 is processed outside the sealing structure of the cathode plate 1 and the anode plate 2, and the two sides of the metal bipolar plate are communicated with each other into a whole after the silica gel injection is finished; and the cathode plate 1 and the anode plate 2 after the sealing structure and the channel are formed are laminated or bonded to obtain the metal bipolar plate.
In the foregoing, the cathode cavity of the metal bipolar plate cathode plate is entirely enclosed in a sealing ring formed by injecting silica gel. The method comprises the steps of obtaining an air cavity side air cavity sealing silica gel strip 100A and a water cavity side water cavity sealing silica gel strip 100B by a cathode gas common pipeline 11, an anode gas common pipeline 12 and silica gel injected at the periphery, processing a sealing ring between a common pipeline sealing ring and a cathode cavity and a water cavity, namely an air cavity side air cavity sealing silica gel strip 103A or an air cavity side water cavity double-layer sealing silica gel strip 102A, cutting the air cavity side air cavity channel sealing strip 1001A and the water cavity side water cavity sealing ring which are separated to form a gap, processing a cathode gas channel hole 16 on a polar plate between the channel strips, and leading gas into or out of the gas channel hole 16 from the common pipeline to the water cavity side of the polar plate and then entering a flow field.
In the foregoing, the common cathode pipe 21, the common anode pipe 22 and the periphery of the anode plate of the metal bipolar plate are injected with silica gel to obtain a silica gel sealing ring, and the cathode cavity is sealed in the common pipe to be entirely enclosed in the silica gel sealing ring. And a sealing ring, namely a sealing silica gel strip 200A at the side of the air cavity or a double-layer sealing rubber strip 202A at the side of the air cavity, is processed between the sealing ring and the cathode cavity and the water cavity, a sealing rubber strip 2003A at the side of the air cavity and a sealing rubber strip 2003B at the side of the water cavity are cut on the sealing ring at the side of the air cavity and the water cavity to form a spaced rubber strip 2003A at the side of the hydrogen cavity and a rubber strip 2003B at the side of the water cavity, anode gas channel holes 24 are processed on the polar plates between the channel rubber strips, and gas is led into or out of the anode gas channel holes 24 from the public pipeline.
In the above, the back surfaces of the cathode plate 1 and the anode plate 2 of the metal bipolar plate are overlapped with each other, and liquid-state molding silica gel is injected around the common pipe and the water flow field to obtain the water cavity of the bipolar plate. Silica gel sealing rings are injected at the periphery of the water public pipeline on the side of the water cavity, water cavity channel rubber strips 1003B and 2003B are formed by cutting on the sealing ring entering the water flow field, and the channel rubber strips on the sealing rings extend to the edge channels 19, 25 and 26 of the flow field of the anode and the cathode plates. For the purpose of integral injection molding, the water cavity side channel adhesive tape is designed to have one end as a blind end and the other end as a channel, if the cathode plate is provided with an inlet end channel strip of water, the channel outlet is a blind end, the anode plate is provided with an outlet end channel strip of water entering the snake-shaped anode flow field, and the channel inlet is a blind end, or the anode plate is provided with an inlet end channel strip of water, the channel outlet is a blind end, the cathode plate is provided with an outlet end channel strip of water entering the snake-shaped anode flow field, and the channel inlet is a blind end.
In the embodiment of the invention, the accessory structure of the metal bipolar plate further comprises routing inspection and positioning, the routing inspection in the embodiment of the invention adopts a pin row bus bar mode, fig. 6 shows a limit injection silica gel 3 at the plugging position of the pin row bus bar, and the positioning of the metal bipolar plate in the embodiment of the invention adopts a positioning hole 14 design.
Claims (8)
1. A high-performance proton exchange membrane fuel cell cathode and anode flow field and its bipolar plate, the metal bipolar plate includes negative plate (1) and anode plate (2), characterized by, punch and get the flow field structure of the straight negative pole flow field (17) of the fold type and snake type anode flow field (27) on negative plate (1) and anode plate (2) respectively, the central position on the surface of the plate of this two-flow field position, negative plate (1) and anode plate (2) have upper, lower two surfaces separately, these two surfaces are gas chamber side and coolant chamber side separately; punching a hole at the frame part of the metal bipolar plate to obtain a common pipeline of the metal bipolar plate, wherein the common pipeline comprises a cathode gas common pipeline (11) and an anode gas common pipeline (12) of air and hydrogen of the metal bipolar plate, a cathode water common pipeline (13), a cathode common pipeline (21), an anode common pipeline (22) and an anode water common pipeline (23); the metal bipolar plate sealing structure and the channel are formed by liquid silica gel injection molding and are respectively completed by one-time injection on the double sides of the cathode plate (1) and the anode plate (2).
2. The cathode-anode flow field and the bipolar plate thereof of the high-performance proton exchange membrane fuel cell as claimed in claim 1, wherein the folded straight cathode flow field (17) comprises a cathode flow field straight section (18) at the inlet end and the outlet end of the flow field, a folded section between the inlet end and the outlet end, and cathode flow field edge sections (19) at two sides of the inlet end and the outlet end of the flow field; wherein, two ends of the folded section are respectively communicated with a group of cathode flow field straight sections (18), two sides of the folded section are respectively communicated with a group of cathode flow field edge sections (19), the inner side of the cathode flow field edge section (19) is a folded edge, and the outer side is a straight edge; the serpentine anode flow field (27) comprises an anode flow field inlet end edge channel (25), an anode flow field outlet end edge channel (26) and a serpentine coil channel communicated with the anode flow field inlet end edge channel and the anode flow field outlet end edge channel.
3. The cathode and anode flow field and the bipolar plate thereof of the high performance proton exchange membrane fuel cell according to claim 1, wherein the outer part of the sealing structure of the cathode plate (1) and the anode plate (2) is provided with a permeable hole (15), and the double-sided silica gel of the metal bipolar plate is communicated with each other into a whole after the silica gel injection.
4. The PEMFC cathode and anode flow field and its bipolar plate as in claim 1 wherein the metal bipolar plate cathode chamber, anode chamber and coolant chamber are integrally enclosed in a sealing ring formed by silica gel injection.
5. The cathode and anode flow field and the bipolar plate thereof of the high performance proton exchange membrane fuel cell according to claim 1, wherein the cathode gas common pipe (11), the anode gas common pipe (12), the cathode water common pipe (13) of the cathode plate (1) of the metal bipolar plate and the periphery of the flow field are injected with silica gel to obtain a gas cavity side gas cavity sealing silica gel strip (100A) and a water cavity side water cavity sealing rubber strip (100B), a sealing ring is reprocessed between the common pipe and the cathode cavity and between the common pipe and the water cavity, namely a gas cavity side gas cavity sealing silica gel strip (103A) or a gas cavity side water cavity double-layer sealing rubber strip (102A), when the cathode gas enters and is led out of the gas cavity, a cathode side gas channel rubber strip (1001A) and a water cavity side gas channel rubber strip (1001B) are formed by cutting on the gas cavity and the water cavity side second layer sealing ring, cathode gas channel holes (16) are formed in the plate between the channel strips, and gas is introduced or led out from the water chamber side channels of the metal bipolar plate to the cathode gas channel holes (16) in common channels and then enters and exits the flow field.
6. The cathode and anode flow field and the bipolar plate thereof of the high performance proton exchange membrane fuel cell according to claim 1, wherein the cathode common pipe (21), the anode common pipe (22), the water common pipe (23) of the anode plate (2) of the metal bipolar plate and the periphery of the flow field are injected with silica gel to obtain a gas cavity side gas cavity sealing silica gel strip (200A) and a water cavity side water cavity sealing rubber strip (200B); a sealing ring is processed between the sealing of the public pipeline and the anode cavity and the water cavity besides a circle of sealing rubber strip for the public pipeline, namely a sealing rubber strip (2001A) for the air cavity side air cavity or a double-layer sealing rubber strip (2002A) for the water cavity side air cavity, when anode gas enters and is led out of the air cavity, the sealing rubber strips (2003A) for the hydrogen cavity channel at the air cavity side and the water cavity side are cut on the sealing ring at the air cavity side and the water cavity side to form a gap, an anode gas channel hole (24) is processed on a polar plate between the channel rubber strips, and the gas is led in or out of the anode gas channel hole (24) from the public pipeline to the water cavity side of the polar plate and then enters and flows out of a snake-shaped anode.
7. The cathode and anode flow field and the bipolar plate thereof of the high-performance proton exchange membrane fuel cell according to claim 1, wherein the back sides of the air cavity sides of the cathode plate (1) and the anode plate (2) of the metal bipolar plate are overlapped, and silica gel is injected at the periphery of the common pipeline and the flow field for sealing to obtain the water cavity of the bipolar plate; cutting a sealing ring entering a water flow field at the side of the water cavity to form spaced water cavity channel rubber strips, wherein the channel rubber strips on the sealing ring extend to the edge channels of the flow field of the cathode plate and the anode plate; the integrated injection molding, the design of water cavity side passageway adhesive tape is that one end is the passageway for dead end one end, there is inlet end passageway strip (1003B) of water on negative plate (1), the passageway export is the dead end, there is water to get into exit end passageway strip (2003B) in snake type anode flow field on positive plate (2), the passageway import is the dead end, perhaps, there is inlet end passageway strip (1003B) of water on positive plate (2), the passageway export is the dead end, there is water to get into exit end passageway strip (2003B) in snake type anode flow field on negative plate (1), the passageway import is the dead end.
8. The cathode and anode flow field and the bipolar plate thereof of the high performance proton exchange membrane fuel cell as claimed in claim 1, wherein the distribution and collection pipes of the inlet and outlet sections of the cooling water are punched at the edge section (19) of the cathode flow field, the edge channel (25) of the inlet end of the anode flow field and the edge channel (26) of the outlet end of the anode flow field; the cathode side flow field straight section (18) is lapped on an edge channel (25) of an inlet end of the anode flow field and an edge channel (26) of an outlet end of the anode flow field.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2019110966213 | 2019-11-11 | ||
| CN201911096621 | 2019-11-11 |
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| CN110828844A true CN110828844A (en) | 2020-02-21 |
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| CN201922025412.1U Active CN211062790U (en) | 2019-11-11 | 2019-11-21 | High-performance flow field bipolar plate of proton exchange membrane fuel cell |
| CN201911150601.XA Pending CN110828844A (en) | 2019-11-11 | 2019-11-21 | High-performance proton exchange membrane fuel cell cathode and anode flow field and bipolar plate thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113270608A (en) * | 2021-06-07 | 2021-08-17 | 嘉寓氢能源科技(辽宁)有限公司 | Metal bipolar plate of proton exchange membrane fuel cell beneficial to fluid distribution |
| CN113745563A (en) * | 2021-07-30 | 2021-12-03 | 东风汽车集团股份有限公司 | Bipolar plate assembly, manufacturing process, electric pile and fuel cell vehicle |
| CN115605427A (en) * | 2020-03-09 | 2023-01-13 | 海厄特控股有限公司（Nl） | Method and device for extracting a component from a gas mixture and method for transporting a gas, in particular hydrogen or ammonia |
| WO2023000483A1 (en) * | 2021-07-20 | 2023-01-26 | 浙江天能氢能源科技有限公司 | Bipolar plate for proton exchange membrane fuel cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701315A (en) * | 2021-01-27 | 2021-04-23 | 福建亚南电机有限公司 | Sealing structure and sealing method of non-welding type metal plate single cell |
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2019
- 2019-11-21 CN CN201922025412.1U patent/CN211062790U/en active Active
- 2019-11-21 CN CN201911150601.XA patent/CN110828844A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115605427A (en) * | 2020-03-09 | 2023-01-13 | 海厄特控股有限公司（Nl） | Method and device for extracting a component from a gas mixture and method for transporting a gas, in particular hydrogen or ammonia |
| CN113270608A (en) * | 2021-06-07 | 2021-08-17 | 嘉寓氢能源科技(辽宁)有限公司 | Metal bipolar plate of proton exchange membrane fuel cell beneficial to fluid distribution |
| WO2023000483A1 (en) * | 2021-07-20 | 2023-01-26 | 浙江天能氢能源科技有限公司 | Bipolar plate for proton exchange membrane fuel cell |
| CN113745563A (en) * | 2021-07-30 | 2021-12-03 | 东风汽车集团股份有限公司 | Bipolar plate assembly, manufacturing process, electric pile and fuel cell vehicle |
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| CN211062790U (en) | 2020-07-21 |
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