CN111490262B - Metal bipolar plate of fuel cell and fuel cell - Google Patents
Metal bipolar plate of fuel cell and fuel cell Download PDFInfo
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- CN111490262B CN111490262B CN202010333253.6A CN202010333253A CN111490262B CN 111490262 B CN111490262 B CN 111490262B CN 202010333253 A CN202010333253 A CN 202010333253A CN 111490262 B CN111490262 B CN 111490262B
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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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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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
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
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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
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a metal bipolar plate of a fuel cell and the fuel cell. The metal bipolar plate includes: the stamping metal polar plate comprises a cavity area and a frame area surrounding the cavity area; the cavity area is provided with an air cavity and a coolant cavity; the frame area is provided with a pipeline connecting port; the pipeline connecting port comprises an air inlet, an air outlet, a coolant inlet and a coolant outlet; the air inlet and the air outlet are positioned at two opposite sides of the cavity, and the coolant inlet and the coolant outlet are positioned at two opposite sides of the cavity; the injection molding colloid is positioned in the frame area; the channel adhesive tape comprises a first channel adhesive tape and a second channel adhesive tape; the first channel adhesive tape and the second channel adhesive tape are both positioned on the first side surface; the first channel adhesive tape is communicated with the cavity area and the air inlet; the second channel adhesive tape is communicated with the cavity area and the air outlet; the sealing rubber strip is arranged around the pipeline connecting port and the cavity area, and is at least positioned on the first side surface. The metal bipolar plate of the fuel cell provided by the embodiment of the invention has high sealing reliability and low production cost.
Description
Technical Field
The invention relates to the field of improvement of metal polar plate structures of fuel cells, in particular to a metal bipolar plate of a fuel cell and the fuel cell.
Background
The proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC) is an electrochemical conversion device for directly converting chemical energy in fuel and oxidant into electric energy, the anode of the proton exchange membrane fuel cell is filled with fuel which is hydrogen, the cathode is filled with air, and oxygen in the air is used as reaction gas of the cathode. The PEMFC mainly comprises a core component, except for a membrane electrode, a cathode plate and an anode plate are also important core components of the PEMFC, and are main parts of the volume and the weight of the PEMFC battery, and the PEMFC has unique important effects of blocking gas, collecting current and distributing gas.
The proton exchange membrane fuel cell is formed by combining a single or multiple bipolar plates and a membrane electrode, oxygen or air is introduced into a cathode cavity, hydrogen is introduced into an anode cavity, fuel cell reaction occurs on the membrane electrode, electric energy is output, water is introduced into a water cavity, and the heat management is carried out on the cell. The cathode cavity, the anode cavity and/or the water cavity are/is provided with public pipelines for inputting and outputting corresponding materials and channels for inputting and outputting the materials from the public pipelines into and from the cavities. The polar plate of the proton exchange membrane fuel cell in the prior art has the problems of unreliable sealing, complex preparation process and high production cost.
Disclosure of Invention
The embodiment of the invention provides a metal bipolar plate of a fuel cell and the fuel cell, which are used for improving the sealing reliability of the metal bipolar plate and reducing the production cost of the metal bipolar plate.
The embodiment of the invention provides a metal bipolar plate of a fuel cell, which comprises the following components: the stamping metal plate comprises a cathode polar plate and an anode polar plate, wherein the cathode polar plate and the anode polar plate comprise a cavity area and a frame area surrounding the cavity area;
the cavity area is provided with an air cavity and a coolant cavity, the air cavity protrudes from a first side surface of the stamping metal plate, and the coolant cavity protrudes from a second side surface of the stamping metal plate opposite to the first side surface;
the frame area is provided with a pipeline connecting port; the pipeline connecting port comprises an air inlet, an air outlet, a coolant inlet and a coolant outlet; the air inlet and the outlet air are positioned at two opposite sides of the cavity, and the coolant inlet and the coolant outlet are positioned at two opposite sides of the cavity;
the injection molding colloid is positioned in the frame area; the injection molding colloid comprises a channel adhesive tape and a sealing adhesive tape; the channel adhesive tape comprises a first channel adhesive tape and a second channel adhesive tape; the first channel adhesive tape and the second channel adhesive tape are both positioned on the first side surface; the first channel adhesive tape is used for communicating the cavity area and the air inlet; the second channel adhesive tape is used for communicating the cavity area and the air outlet; the sealing rubber strip is arranged around the pipeline connecting port and the cavity area, and is at least positioned on the first side surface.
Optionally, the air inlet includes an anode air inlet and a cathode air inlet; the air outlet comprises an anode air outlet and a cathode air outlet;
the air cavity of the anode plate comprises a hydrogen air cavity, and the first channel adhesive tape is used for communicating the anode air inlet and the hydrogen air cavity; the second channel adhesive tape is used for communicating the anode gas outlet and the hydrogen cavity; or alternatively, the process may be performed,
the air cavity of the cathode plate comprises an air cavity, and the first channel adhesive tape is used for communicating the cathode air inlet and the air cavity; the second channel adhesive tape is used for communicating the cathode air outlet and the air cavity.
Optionally, the frame area of the polar plate where the first side surface and the second side surface are both injected with glue is further provided with at least one glue penetrating hole;
the channel adhesive tape further comprises a third channel adhesive tape and a fourth channel adhesive tape; the third channel adhesive tape is used for communicating the coolant inlet and the coolant cavity; the fourth communication adhesive tape is used for communicating the coolant outlet and the coolant cavity;
the third channel adhesive tape and the fourth channel adhesive tape are positioned on the polar plates of which the first side surface and the second side surface are subjected to adhesive injection.
Optionally, the frame area is provided with a communication hole;
the communication holes are respectively positioned at two sides of the first channel adhesive tape used for communicating the gas inlet, the gas cavity and the second channel adhesive tape used for communicating the gas outlet and the gas cavity.
Optionally, the injection molding colloid further comprises a supporting anti-slip adhesive tape;
the support anti-slip adhesive tape is used for supporting and fixing the sealing adhesive tape.
Optionally, the height of the sealing rubber strip in an uncompressed state is h1, and the height of the supporting anti-skid rubber strip in an uncompressed state is h2; wherein h1> h2.
Optionally, after the battery is assembled, the compression amount of the sealing rubber strip is A1, and the compression amount of the supporting anti-skid rubber strip is A2; wherein A1> A2.
Optionally, the method further comprises:
and the corrosion-resistant conductive coating is arranged on the surface of the stamping metal plate.
Optionally, a distance between an edge of the side, facing away from the cavity area, of the frame area and an edge of the side, facing away from the cavity area, of the injection molding colloid is d; wherein d is more than or equal to 0.5 and less than or equal to 2mm.
The embodiment of the invention also provides a fuel cell, which comprises: the metal bipolar plate of a fuel cell of any of the embodiments described above.
According to the metal bipolar plate of the fuel cell, an air cavity and a coolant cavity are formed in a cavity area on a stamping metal plate through a stamping process, and a pipeline connection port is formed in a frame area of the stamping metal plate; meanwhile, the frame area of the stamping metal plate is also provided with an injection molding colloid formed by an injection molding process, the injection molding colloid comprises a sealing rubber strip and a channel rubber strip, the channel rubber strip at least can enable an air cavity of the stamping metal plate to be communicated with a corresponding pipeline connecting port, and the sealing rubber strip is arranged around the pipeline connecting port and the cavity area and can play a role in sealing, so that leakage of gas, liquid and the like is prevented. The fuel cell bipolar plate sealing structure and the channel structure are integrally formed by adopting an injection molding process, and the fuel cell bipolar plate sealing structure is simple in structure, simple in preparation process and low in production cost.
Drawings
Fig. 1 is a schematic structural diagram of a metal plate of a fuel cell according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a metal plate of another fuel cell according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a metal plate of another fuel cell according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a metal plate of another fuel cell according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a metal plate of another fuel cell according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a fuel cell according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The embodiment of the invention provides a metal bipolar plate of a fuel cell, which can be a cathode plate and/or an anode plate of the fuel cell. Fig. 1 is a schematic structural diagram of a metal plate of a fuel cell according to an embodiment of the present invention. As shown in fig. 1, the metal plate of the fuel cell includes: a stamped metal plate comprising a cavity region 10 and a rim region 20 surrounding the cavity region 10; the cavity region 10 is provided with an air cavity 11 and a coolant cavity (fig. 1 exemplarily shows the air cavity 11 of the anode plate), and the air cavity 11 protrudes from a first side surface of the stamped metal plate, and the coolant cavity protrudes from a second side surface of the stamped metal plate opposite to the first side surface; the frame area 20 is provided with a pipeline connecting port 21; the pipe connection port 21 includes an air inlet 211, an air outlet 212, a coolant inlet 213, and a coolant outlet 214; the air inlet 211 and the air outlet 212 are positioned at two sides of the cavity area 10, and the coolant inlet 213 and the coolant outlet 214 are positioned at two opposite sides of the cavity area 10; an injection molding compound 30 located in the rim area 20; the injection molding colloid 30 comprises a channel adhesive tape 31 and a sealing adhesive tape 32; the channel strip 31 comprises a first channel strip 311 and a second channel strip 312; the first channel adhesive tape 311 and the second channel adhesive tape 312 are both positioned on the first side surface; the first channel adhesive tape 311 is used for communicating the air cavity 11 with the air inlet 211; the second channel adhesive tape 312 is used for communicating the air cavity 11 with the air outlet 212; the joint strip 32 is disposed around the pipe connection port 21 and the cavity region 10, and the joint strip 32 is located at least on the first side surface.
The air inlet 211, the air outlet 212, the coolant inlet 213 and the coolant outlet 214 are formed by stamping the metal plate, and the stamped air inlet 211, the stamped air outlet 212, the stamped coolant inlet 213 and the stamped coolant outlet 214 are used as the inlet and outlet pipelines for three mediums in the fuel cell to enter the fuel cell for electrochemical reaction, wherein the three mediums of the fuel cell are air, hydrogen and coolant.
It should be noted that fig. 1 is only an exemplary drawing of an embodiment of the present invention, where a first side surface of a metal plate of a fuel cell is presented in fig. 1, and a second side surface opposite to the first side surface may be the same as or different from the first side surface in structure, and the embodiment of the present invention is not limited thereto specifically.
Further, referring to fig. 1 and 2, the molding compound 30 is located in the frame area 20, and the molding compound 30 is distributed on the frame area 20 on the first side surface and the second side surface of the polar plate. The injection molding glue 30 comprises a channel glue strip 31 and a sealing glue strip 32, the channel glue strip 31 comprises a first channel glue strip 311 and a second channel glue strip 312, the first channel glue strip 311 and the second channel glue strip 312 are positioned on the first side surface, the first channel glue strip 311 is used for communicating the air cavity 11 with the air inlet 211, and the second channel glue strip 312 is used for communicating the air cavity 11 with the air outlet 212. Through the colloid 30 of moulding plastics at the first side surface and the second side surface of punching press metal sheet, the passageway adhesive tape 31 in the colloid 30 of moulding plastics extends to first side surface processing through the air inlet 211 through the colloid of moulding plastics of backside, can make the air cavity 11 of punching press metal sheet and corresponding pipeline connector 21 intercommunication, and joint strip 32 sets up around pipeline connector 21 and cavity district 10, can play sealed effect, prevents leakage of gas, liquid etc..
According to the metal polar plate of the fuel cell, an air cavity and a coolant cavity are formed in a cavity area on a stamping metal plate through a stamping process, and a pipeline connecting port is formed in a frame area of the stamping metal plate; meanwhile, the frame area of the stamping metal plate is also provided with an injection molding colloid formed by an injection molding process, the injection molding colloid comprises a sealing rubber strip and a channel rubber strip, the channel rubber strip at least can enable a cavity area of the stamping metal plate to be communicated with a corresponding pipeline connecting port, and the sealing rubber strip is arranged around the pipeline connecting port and the cavity area, so that sealing effect can be achieved, and leakage of gas, liquid and the like is prevented. The fuel cell bipolar plate sealing structure and the channel structure are integrally formed by adopting an injection molding process, and the fuel cell bipolar plate sealing structure is simple in structure, simple in preparation process and low in production cost.
Optionally, with continued reference to fig. 1, the air inlet 211 includes an anode air inlet 211A and a cathode air inlet 211B, and the air outlet 212 includes an anode air outlet 212A and a cathode air outlet 212B; the air cavity 11 of the anode plate comprises a hydrogen air cavity 11A, a first channel adhesive tape 311 is used for communicating the anode air inlet 211A with the hydrogen air cavity 11A, and a second channel adhesive tape 312 is used for communicating the anode air outlet 212B with the hydrogen air cavity 11A; alternatively, the first channel adhesive tape 311 is used to communicate the cathode air inlet 211B with the air chamber 11B; the second channel strip 312 is used to communicate the cathode outlet 212B with the air chamber 11B as shown in fig. 3.
Since the metal plate of the fuel cell may be the cathode plate and/or the anode plate of the fuel cell, when the metal plate of the fuel cell is the cathode plate of the fuel cell, the first channel adhesive tape 311 is used for communicating the cathode air inlet 211B with the air chamber 11B, and the second channel adhesive tape 312 is used for communicating the cathode air outlet 212B with the air chamber 11B, as shown in fig. 2. When the metal plate of the fuel cell is the anode plate of the fuel cell, the first channel strip 311 is used to communicate the anode inlet 211A with the hydrogen chamber 11A, and the second channel strip 312 is used to communicate the anode outlet 212A with the hydrogen chamber 11A, as shown in fig. 1.
Through setting up first passageway adhesive tape 311 and second passageway adhesive tape 312 at cathode plate first side surface, first passageway adhesive tape 311 intercommunication cathode air inlet 211B and air chamber 11B, second passageway adhesive tape 312 intercommunication cathode outlet 212B and air chamber 11B, when cathode gas reaches air chamber 11B one side of cathode plate through the cathode inlet port, gets into air chamber 11B through first passageway adhesive tape 311 to go out air chamber 11B through second passageway adhesive tape 312. Through set up first passageway adhesive tape 311 and second passageway adhesive tape 312 at anode plate first side surface, first passageway adhesive tape 311 communicates through anode gas inlet 211A and hydrogen chamber 11A, and second passageway adhesive tape 312 communicates anode gas outlet 212A and hydrogen chamber 11A, when the positive pole gas reaches anode plate's hydrogen chamber 11A one side through the positive pole inlet port, gets into hydrogen chamber 11A through first passageway adhesive tape 311 to go out hydrogen chamber 11A through second passageway adhesive tape 312.
When the first channel adhesive tape 311 is connected to the anode inlet 211A and the hydrogen chamber 11A, and the second channel adhesive tape 312 is connected to the anode outlet 212A and the hydrogen chamber 11A, there is no sealing adhesive tape between the first channel adhesive tape 311 and the anode inlet 211A, and there is no sealing adhesive tape between the second channel adhesive tape 312 and the anode outlet 212A. And when the first channel adhesive tape 311 is communicated with the cathode air inlet 211B and the air cavity 11B, the second channel adhesive tape 312 is communicated with the cathode air outlet 212B and the air cavity 11B, a sealing adhesive tape is arranged between the first channel adhesive tape 311 and the cathode air inlet 211B, and a sealing adhesive tape is arranged between the second channel adhesive tape 312 and the cathode air outlet 212B.
Optionally, as shown in fig. 2, the frame area 20 of the polar plate with glue injected on the first side surface and the second side surface is further provided with at least one glue penetrating hole 40, and the channel glue strip 31 further includes a third channel glue strip 313 and a fourth channel glue strip 314; the third channel strip 313 is used to communicate the coolant inlet 213 with the coolant cavity 12; the fourth communication bead 314 is used to communicate the coolant outlet 214 with the coolant cavity 12; the third channel adhesive tape 313 and the fourth channel adhesive tape 314 are also positioned on the second side surface of the polar plate, where the first side surface and the second side surface are both subjected to glue injection.
By way of example, the metallic bipolar plate of the fuel cell in fig. 2 may be the anode plate of the fuel cell. Because the first side surface and the second side surface of the anode plate of the fuel cell are both provided with the sealing rubber strips 32, at least one glue penetrating hole 40 is formed in the frame area 20 of the anode plate, and when the glue injection process is carried out on the surface of the anode plate, the injection molding glue 30 on the first side surface can reach the second side surface through the glue penetrating hole 40, so that the integrated glue injection is realized. Further, the glue injection holes 40 can be used to connect the glue injection on the first side surface with the glue injection on the second side surface, so as to fix the glue injection on the first side surface and the second side surface.
Further, the third channel adhesive tape 313 and the fourth channel adhesive tape 314 are arranged on the second side surface of the anode plate, the third channel adhesive tape 313 is communicated with the coolant inlet 213 and the coolant cavity 12, the fourth channel adhesive tape 314 is communicated with the coolant outlet 214 and the coolant cavity 12, and sealing adhesive tapes are arranged around the connecting ports of the coolant inlet 213 and the coolant outlet 214 and the coolant cavity and the connecting ports of the air cavity inlet 211 and the air cavity outlet 212, so that the mutual blocking of the coolant and the air cavity in the fuel cell is realized through the sealing adhesive tapes, and the sealing adhesive tapes are respectively arranged in different sealing cavities, so that the phenomenon that three cavity mediums are mutually mixed is avoided.
Optionally, with continued reference to fig. 3, the rim area 20 is provided with a communication hole 50, the communication hole 50 being located for communicating the air inlet 211B with the air chamber 11 and for communicating the air chamber 11 with the air chamber air outlet 212B.
As shown in fig. 3, the plate is provided with a communication hole 50 between the air inlet 211B and the air cavity 11 and between the air outlet 212B and the air cavity 11. In the operation process of the fuel cell, as shown in fig. 1, the anode gas enters the hydrogen cavity 11A through the first channel adhesive tape 311 between the anode gas inlet 211A of the metal anode plate and the hydrogen cavity 11A, as shown in fig. 2, the coolant enters the coolant cavity 12 through the third channel adhesive tape 313 of the 12 between the coolant inlet 213 and the coolant cavity, as shown in fig. 3, the cathode gas reaches the cathode gas inlet 211B and then reaches the cathode gas cavity 11B side through the communication hole 50, and then enters the air cavity 11B through the first channel adhesive tape 311, so that the cathode gas path, the anode gas path and the coolant path enter each electrochemical reaction cavity through different channels, and sealing adhesive tapes 32 are arranged around the channel adhesive tapes 31 to realize mutual blocking so that different fuels are respectively located in different sealing channels.
It should be noted that, the cathode plate and the anode plate each include an anode air inlet 211A, a cathode air inlet 211B, an anode air outlet 212A, a cathode air outlet 212B, a coolant inlet 213 and a coolant outlet, that is, in the electrochemical reaction process of the fuel cell, the cathode gas, the anode gas and the coolant enter and exit the respective cavities of the fuel cell through the air inlet and the air outlet on the surface of the metal plate to perform the electrochemical reaction.
Further, fig. 4 schematically illustrates a structure of the second side surface of the cathode plate, and as shown in fig. 4, the second side surface of the cathode plate is not injected with glue, and the cavity area 10 of the second side surface of the cathode plate is provided with a coolant cavity 12.
Optionally, as shown in fig. 5, the injection molding colloid 30 further includes a supporting anti-slip adhesive tape 33, where the supporting anti-slip adhesive tape 33 is used for supporting and fixing the sealing adhesive tape 32.
The support anti-slip adhesive tape 33 is injection molded on the edge of the sealing adhesive tape 32, and the support anti-slip adhesive tape 33 is used for supporting and fixing the sealing adhesive tape 32. In the fuel cell assembly process, when the sealing rubber strip is deformed after being pressed, the sealing rubber strip is easy to slide or move, and the edge of the sealing rubber strip supports the anti-slip rubber strip, so that the stress area can be increased, and the sliding of the sealing rubber strip is prevented.
Optionally, the height of the sealing rubber strip 32 is h1, and the height of the supporting anti-skid rubber strip 33 is h2; wherein h1> h2.
The thickness of the sealing rubber strip 32 is larger than that of the supporting anti-slip rubber strip 33, namely, the specific size and the specific shape of the glue injection mold are set in the process of integrally injecting glue through the stamping metal plate, so that the whole glue injection is completed. In the process of integrally injection molding the sealing rubber strip 32 and the supporting anti-slip rubber strip 33, the thickness of the sealing rubber strip 32 is thicker than that of the supporting anti-slip rubber strip 33, and the compression ratio of the sealing rubber strip 32 in the assembled state is larger than that of the supporting anti-slip rubber strip 33, namely in the sealed state.
Further, in the assembled state of the battery, the compression amount of the sealing rubber strip 32 is A1, and the compression amount of the supporting anti-slip rubber strips 33, 34 is A2; wherein A1> A2.
Since the shapes, sizes and compression amounts of the sealing rubber strip 32, the channel rubber strip 31 and the supporting anti-skid rubber strip 33 are matched with the design of the battery, the compression amount of the channel rubber strip 31 and the supporting anti-skid rubber strip 33 in the fuel cell assembly process is generally lower than 10-15% of the compression amount of the sealing rubber strip 32, and the fuel cell designed by the process has good sealing reliability.
Optionally, a corrosion resistant conductive coating is provided on the surface of the stamped metal plate.
Because the metal polar plate of the general fuel cell is a stainless steel polar plate, the metal polar plate made of stainless steel has poor electric conductivity, and the electric conductivity of the metal polar plate can be improved by carrying out corrosion-resistant electric-conductive coating treatment on the surface of the metal polar plate made of stainless steel, so that the electric conductivity of the bipolar plate of the fuel cell is improved.
Optionally, with continued reference to fig. 1, a distance d is between an edge of the side of the bezel area 20 facing away from the cavity area 10 and an edge of the side of the injection molding compound 30 facing away from the cavity area 10; wherein d is more than or equal to 0.5 and less than or equal to 2mm.
Because the metal polar plate adopts the injection mold to carry out integrative injecting glue, set up the injecting glue mould and leave white 0.5-2mm as injecting glue mould edge of sealing in the polar plate inside and outside, fixed polar plate prevents that the polar plate from warping and causing the colloid size accuracy defect of moulding plastics.
The embodiment of the invention also provides a fuel cell bipolar plate, as shown in fig. 6, comprising: the metal plate of the fuel cell provided in any one of the embodiments above; the metal plates of the two fuel cells include an anode plate 100 and a cathode plate 200; the second side surface of the stamped metal plate in the anode plate 100 is disposed opposite the second side surface of the stamped metal plate in the cathode plate 200.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A metallic bipolar plate for a fuel cell, comprising:
the stamping metal plate comprises a cathode polar plate and an anode polar plate, wherein the cathode polar plate and the anode polar plate comprise a cavity area and a frame area surrounding the cavity area;
the cavity area is provided with an air cavity and a coolant cavity, the air cavity protrudes from a first side surface of the stamping metal plate, and the coolant cavity protrudes from a second side surface of the stamping metal plate opposite to the first side surface;
the frame area is provided with a pipeline connecting port; the pipeline connecting port comprises an air inlet, an air outlet, a coolant inlet and a coolant outlet; the air inlet and the air outlet are positioned at two sides of the cavity area, and the coolant inlet and the coolant outlet are positioned at two opposite sides of the cavity area;
the injection molding colloid is positioned in the frame area; the injection molding colloid comprises a channel adhesive tape and a sealing adhesive tape; the channel adhesive tape comprises a first channel adhesive tape and a second channel adhesive tape; the first channel adhesive tape and the second channel adhesive tape are both positioned on the first side surface; the first channel adhesive tape is used for communicating the cavity area and the air inlet; the second channel adhesive tape is used for communicating the cavity area and the air outlet; the sealing rubber strip is arranged around the pipeline connecting port and the cavity area, and is at least positioned on the first side surface.
2. The metallic bipolar plate of a fuel cell of claim 1, wherein the air inlet comprises an anode air inlet and a cathode air inlet; the air outlet comprises an anode air outlet and a cathode air outlet;
the air cavity of the anode plate comprises a hydrogen air cavity, and the first channel adhesive tape is used for communicating the anode air inlet and the hydrogen air cavity; the second channel adhesive tape is used for communicating the anode gas outlet and the hydrogen cavity; or alternatively, the process may be performed,
the air cavity of the cathode plate comprises an air cavity, and the first channel adhesive tape is used for communicating the cathode air inlet and the air cavity; the second channel adhesive tape is used for communicating the cathode air outlet and the air cavity.
3. The metallic bipolar plate of a fuel cell of claim 1 wherein said border region of said plate having said first side surface and said second side surface being impregnated with glue is further provided with at least one glue penetrating aperture;
the channel adhesive tape further comprises a third channel adhesive tape and a fourth channel adhesive tape; the third channel adhesive tape is used for communicating the coolant inlet and the coolant cavity; the fourth joint strip is used for communicating the coolant outlet and the coolant cavity;
the third channel adhesive tape and the fourth channel adhesive tape are also positioned on the second side surface of the polar plate, wherein the first side surface and the second side surface of the polar plate are used for injecting the adhesive.
4. The metallic bipolar plate of a fuel cell as claimed in claim 2, wherein said frame region is provided with communication holes;
the communication holes are respectively positioned at two sides of the first channel adhesive tape used for communicating the air inlet with the air cavity and the second channel adhesive tape used for communicating the air outlet with the air cavity.
5. The metallic bipolar plate of a fuel cell of claim 1, wherein the injection molding compound further comprises a support slip resistant adhesive strip;
the support anti-slip adhesive tape is used for supporting and fixing the sealing adhesive tape.
6. The metallic bipolar plate of a fuel cell of claim 5 wherein said sealing strip has an uncompressed height h1 and said support slip resistant strip has an uncompressed height h2; wherein h1> h2.
7. The metallic bipolar plate of a fuel cell of claim 5 wherein in the assembled state of the cell, the sealing strip is compressed by A1 and the support slip resistant strip is compressed by A2, wherein A1> A2.
8. The metallic bipolar plate of a fuel cell of claim 1 further comprising:
and the corrosion-resistant conductive coating is arranged on the surface of the stamping metal plate.
9. The metallic bipolar plate of a fuel cell of claim 1 wherein the distance between the edge of the side of the border region facing away from the cavity region and the edge of the side of the injection molding compound facing away from the cavity region is d; wherein d is more than or equal to 0.5 and less than or equal to 2mm.
10. A fuel cell, characterized by comprising: a metallic bipolar plate of a fuel cell according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010333253.6A CN111490262B (en) | 2020-04-24 | 2020-04-24 | Metal bipolar plate of fuel cell and fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010333253.6A CN111490262B (en) | 2020-04-24 | 2020-04-24 | Metal bipolar plate of fuel cell and fuel cell |
Publications (2)
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