CN112701311A - Air-cooled fuel cell bipolar plate and preparation method thereof - Google Patents
Air-cooled fuel cell bipolar plate and preparation method thereof Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- 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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0206—Metals or alloys
-
- 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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0206—Metals or alloys
- H01M8/0208—Alloys
-
- 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
- H01M8/023—Porous and characterised by the material
- H01M8/0232—Metals or alloys
-
- 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
-
- 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
-
- 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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Abstract
本发明公开了一种风冷型燃料电池双极板及其制备方法，属于燃料电池技术领域。所述金属双极板包括阳极侧极板和阴极流场板、阴极集流板。阳极侧极板和阴极流场板重叠对应的两个开孔为公共管道，两个开孔四周进行焊接等方法固定并密封。阴极流场板的另一个面与阴极集流板重叠用焊接等方法固定。阳极侧极板与膜电极之间采用粘结密封，阳极侧极板与阴极流场板焊接后所形成公共管道四周用密封垫密封燃料气体，组装电池压紧后密封垫高度与组装电池压紧后的阴极流场板及集流板的高度适配。所述双极板的零件都为超薄金属板，冲压及焊接工艺简单，制造和后续的装配工序都相对简单，非常适于大规模加工制造同时降低成本，并得到实际应用。The invention discloses an air-cooled fuel cell bipolar plate and a preparation method thereof, belonging to the technical field of fuel cells. The metal bipolar plate includes an anode side plate, a cathode flow field plate, and a cathode current collector plate. The two openings corresponding to the overlapping of the anode side plate and the cathode flow field plate are common pipes, and the two openings are fixed and sealed by welding and other methods around the openings. The other surface of the cathode flow field plate is overlapped with the cathode current collector plate and fixed by welding or the like. The anode side plate and the membrane electrode are bonded and sealed. The fuel gas is sealed around the common pipeline formed by the welding of the anode side plate and the cathode flow field plate. After the assembled battery is pressed, the height of the gasket is the same as that of the assembled battery. The height of the cathode flow field plate and the current collector plate is adapted. The parts of the bipolar plate are all ultra-thin metal plates, the stamping and welding processes are simple, and the manufacturing and subsequent assembly processes are relatively simple, which is very suitable for large-scale processing and manufacturing while reducing costs, and is practically applied.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to an air-cooled fuel cell bipolar plate and a preparation method thereof.
Background
Proton Exchange Membrane Fuel Cells (PEMFCs) are low-noise, high-energy-conversion-efficiency, zero-emission power generation devices that can be started quickly at room temperature. The proton exchange membrane fuel cell can be used for a mobile power supply, a portable power supply, an aviation power supply, a vehicle power supply, a fixed power station and the like, can meet the power utilization requirements of multiple fields, and is one of the fuel cells closest to practical application.
The bipolar plate is one of the important components of the proton exchange membrane fuel cell, plays an important role in separating an oxidant and a reducing agent, distributing fluid, collecting current, managing generated water and managing generated heat, and maintains the cell in a good working state. In a proton exchange membrane fuel cell, the conventional bipolar plates mainly include a graphite bipolar plate, a metal bipolar plate, a composite bipolar plate, and the like. The graphite bipolar plate and the composite bipolar plate have some factors which limit the application environment and improve the performance, for example, the graphite bipolar plate has poor shock resistance, cannot be made thinner, the assembly force is difficult to control, and the cost is high; although the composite bipolar plate has great improvement in mechanical strength, the composite bipolar plate is relatively complex to machine and assemble due to more adopted materials and parts, the mass specific power and the volume specific power are difficult to further improve, and the cost is difficult to further reduce. In contrast, the metal bipolar plate can be processed to be very light and thin, the mass specific power and the volume specific power are greatly improved, and meanwhile, the requirements of excellent conductivity, good heat transfer performance, high mechanical strength and the like can be met. And the polar plate is processed by stamping, so that the method is suitable for large-scale production and can strictly control the cost.
In air-cooled fuel cells, graphite bipolar plates are commonly used. In chinese patents 201510449567.1 and 201610333293.4, porous graphite plates (also porous metal plates) were used as the cathode plate to reduce the weight of the cathode plate. In chinese patent 201010217390.X, a raw material for preparing a graphite bipolar plate and a method for preparing a bipolar plate are described. Neither technique reduces the weight of the bipolar plate compared to the use of a thin metal plate for the bipolar plate. In the chinese patent 200710056414.6, an anode flow field plate and a cathode flow field plate (stainless steel plate is 0.1-0.2mm thick) are prepared by stamping technology, a light aluminum alloy is used as a support plate between an anode plate and a cathode plate, and the cathode plate is a square with a side length of 1.5mm or a semicircle with a radius of 0.75 mm. The anode flow field plate, the supporting plate and the cathode plate are directly overlapped and combined together and sealed by the sealing ring, so that the surface resistance is large, the weight is heavy, the structure is complex, and the device is not suitable for mass production. In the chinese patent 200820153416.7, the bipolar plate is composed of three parts, one is an anode flow field stamping plate (the thickness of the metal plate is 0.05-0.2mm), the other is a cathode flow field stamping plate, and a plastic member with holes, the anode flow field plate and the cathode flow field plate are connected together by welding or bonding, the plastic member and the anode flow field plate are connected together by welding, where the plastic member and the metal flow field plate can be welded together, which is difficult to be realized by the conventional technology, and the welding is not real, which can cause the hydrogen gas to be not sealed, and the hydrogen gas leaks. In the chinese patent 201611012620.2, a hydrogen side plate and an air flow field plate with a cambered cross-section are welded together, and then support bodies at two ends of the air flow field plate and the hydrogen side plate are bonded together to form a common pipeline for hydrogen, so that the structure is complex, and a colloid bonding technology is used at multiple places, and more technical guarantees are required to be provided in the aspects of sealing, service life, environmental adaptability and the like.
Due to the advantages of metal bipolar plates, their use is becoming more and more widespread. The more parts are used and the more types of materials are used, the higher the processing and assembling cost is, the higher the probability of problems in the processing, assembling and running processes is, the higher the subsequent maintenance and repair cost is, and the disadvantages of continuous running of the fuel cell are caused. The present invention has been made to overcome the above disadvantages.
Disclosure of Invention
In order to solve the technical problems, the invention provides an air-cooled fuel cell bipolar plate and a preparation method thereof, wherein the preparation material is a metal plate with the thickness of 0.01-1 mm; the structure only has three parts, namely an anode side plate, a cathode flow field plate and a cathode current collecting plate, and only has stamping and welding assembly processes. Therefore, the ultrathin and ultralight metal bipolar plate can further reduce the processing cost of the bipolar plate and further improve the mass specific power and the volume specific power of a fuel cell stack.
The invention provides an air-cooled fuel cell bipolar plate, which sequentially comprises an anode side polar plate 1, a cathode flow field plate 2 and a cathode current collecting plate 3, wherein two ends of the anode side polar plate 1 are provided with mutually parallel common pipelines a 5, two ends of the cathode flow field plate 2 are provided with mutually parallel common pipelines b 13, the middle area of the cathode flow field plate 2 is a cathode flow field, the bipolar plate is provided with a sealing gasket 10, the sealing gasket 10 is provided with a sealing gasket common pipeline 12, one surface of the sealing gasket 10 is provided with an air guide channel 11, the air guide channel 11 is a plurality of strip-shaped flow guide grooves which are arranged in parallel, one end of each flow guide groove is communicated with the sealing gasket common pipeline 12, the other end of each flow guide groove is communicated with the anode flow field, the air flow direction in the air guide channel 11 is vertical to the air, The common pipe b 13 and the gasket common pipe 12 are the same in shape and size and are arranged correspondingly.
Furthermore, in the above technical solution, welding lines a 6 are respectively arranged on opposite surfaces of the anode side plate 1 and the cathode flow field plate 2, the welding lines a 6 are located around the common pipe a 5 and the common pipe b 13, and the anode side plate 1 and the cathode flow field plate 2 are connected by the welding lines a 6; and welding lines b 7 are respectively arranged on the opposite surfaces of the cathode flow field plate 2 and the cathode current collecting plate 3, the welding lines b 7 are positioned at the two ends of the cathode flow field close to one side of the common pipeline b 13 on the cathode flow field plate 2 and at the two ends of the cathode current collecting plate 3, and the cathode flow field plate 2 and the cathode current collecting plate 3 are connected through the welding lines b 7.
Further, in the above technical solution, the welding modes among the anode side plate 1, the cathode flow field plate 2, and the cathode current collecting plate 3 include laser welding, electron beam welding, resistance welding, diffusion welding, ultrasonic welding, and high frequency welding.
Further, in the above technical solution, the anode side plate 1 is a flat plate, the cathode current collecting plate 3 is a perforated plate, the aperture ratio is 25-60%, and the aperture is 1-3 mm.
Further, in the above technical solution, the cathode flow field portion of the cathode flow field plate 2 is corrugated or corrugated, the height of each corrugation or corrugation is 0.3-3mm, and the width between adjacent corrugations or corrugations is 0.5-3 mm. Preferably each corrugation or flute has a height of 0.5-2mm and a width between adjacent corrugations or flutes of 1-2.5 mm.
Furthermore, in the above technical solution, the anode electrode plate 1, the cathode electrode plate 2 and the cathode current collecting plate 3 are made of metal.
Further, in the above technical solution, the metal is a stainless steel plate, a titanium alloy plate, an aluminum alloy plate, a nickel alloy or a copper plate.
Further, in the above technical solution, the thickness of the anode side plate 1 is 0.03-1 mm; the thickness of the cathode flow field plate 2 is 0.03-0.5 mm; the thickness of the cathode collector plate 3 is 0.01-0.2 mm. Preferably, the thickness of the anode side plate 1 is 0.05-0.1 mm; the thickness of the cathode flow field plate 2 is 0.05-0.1 mm; the thickness of the cathode collector plate 3 is 0.02-0.05 mm.
Further, in the above technical solution, the thickness of the sealing gasket 10 is equal to the thickness of the cathode flow field plate 2 and the cathode current collecting plate 3 stacked together.
The invention also provides a preparation method of the air-cooled fuel cell bipolar plate, which comprises any one of the following preparation methods: welding an anode side plate 1, a cathode flow field plate 2 and a cathode current collecting plate 3 along the welding line position, sticking a sealing gasket 10 to a common pipeline at two sides of the cathode flow field plate according to the direction of an air guide channel facing the cathode flow field plate 3, and leading the thickness of the sealing gasket 10 to be consistent with the sum of the thicknesses of the cathode flow field plate 2 and the cathode current collecting plate 3 through compression, thus obtaining the air-cooled fuel cell bipolar plate.
According to the invention, the thin metal bipolar plate has the following advantages:
1. the structure is simple, the processing and the manufacturing are easy, the large-scale production is suitable, and the cost is greatly reduced;
2. the process and requirements for assembling the galvanic pile are relatively simple, the consistency of the galvanic pile is improved, the ohmic impedance is reduced, and the performance of the battery is improved;
3. the bipolar plate is ultra-light and ultra-thin, the mass and the thickness of the bipolar plate are greatly reduced, the mass specific power of the galvanic pile is greatly improved, and the bipolar plate is the best choice for aviation power supplies and portable power supplies.
Drawings
FIG. 1 is a schematic view of a bipolar plate-membrane electrode assembly;
FIG. 2 is a schematic view of bipolar plate welding;
FIG. 3 is a schematic view of a corrugated flow field plate;
FIG. 4 is a schematic view of a gasket construction;
figure 5 shows the performance of the fuel cell of example 1.
The schematic diagram illustrates, 1, an anode side plate; 2. a cathode flow field plate; 3. a cathode collector plate; 4. a bipolar plate; 5. a common pipe a; 6. a welding line a; 7. a welding line b; 8. a membrane electrode a; 9. a membrane electrode b; 10. a gasket; 11. an air guide channel; 12. a gasket common conduit; 13. a common conduit b.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
As shown in figure 1, the air-cooled fuel cell bipolar plate is provided with an anode side plate 1, a cathode flow field plate 2 and a cathode collector plate 3 in sequence, wherein two ends of the anode side plate 1 are provided with common pipelines a 5 which are parallel to each other, two ends of the cathode flow field plate 2 are provided with common pipelines b 13 which are parallel to each other, the middle area of the cathode flow field plate 2 is a cathode flow field, the bipolar plate is provided with a sealing gasket 10, the sealing gasket 10 is provided with a sealing gasket common pipeline 12, one surface of the sealing gasket 10 is provided with an air guide channel 11, the air guide channel 11 is a plurality of strip-shaped flow guide grooves which are arranged in parallel, one end of each flow guide groove is communicated with the sealing gasket common pipeline 12, the other end is communicated with the anode flow field, the air flow direction in the air guide channel 11 is vertical, The common pipeline b 13 and the sealing gasket common pipeline 12 are the same in shape and size and are arranged correspondingly; welding lines a 6 are respectively arranged on the opposite surfaces of the anode side plate 1 and the cathode flow field plate 2, the welding lines a 6 are positioned on the peripheries of a common pipeline a 5 and a common pipeline b 13, and the anode side plate 1 and the cathode flow field plate 2 are connected through the welding lines a 6; and welding lines b 7 are respectively arranged on the opposite surfaces of the cathode flow field plate 2 and the cathode current collecting plate 3, the welding lines b 7 are positioned at the two ends of the cathode flow field close to one side of the common pipeline b 13 on the cathode flow field plate 2 and at the two ends of the cathode current collecting plate 3, and the cathode flow field plate 2 and the cathode current collecting plate 3 are connected through the welding lines b 7.
The anode side polar plate 1, the cathode flow field plate 2 and the cathode collector plate 3 are mutually overlapped and assembled to form a complete bipolar plate 4; the three plates prepared were identical in width direction, the anode side plate 1 and the cathode flow field plate 2 were identical in length direction, and the flow field portion of the cathode flow field plate 2 and the cathode current collecting plate 3 were identical in length direction.
Specifically, three thin metal plate parts are selected to be a stainless steel anode side plate 1 with the thickness of 0.05mm, a stainless steel cathode flow field plate 2 with the thickness of 0.05mm and a copper cathode current collecting plate 3 with the thickness of 0.03mm respectively. And pressing the flow field part of the cathode side polar plate 2 into a corrugated plate with the height of 2mm and the gap width of 2mm, and simultaneously preparing the cathode current collecting plate 3 with the aperture of 2mm and the aperture ratio of 50%. The common pipelines at two ends of the anode side polar plate 1 in the bipolar plate are manufactured by machining, stamping, laser cutting and linear cutting. The cathode side plate 2 and the cathode collector plate 3 are welded together by laser welding, and then the anode side plate 1 and the cathode flow field plate 2 are welded together by laser welding to form the complete bipolar plate 4. The surface of the complete bipolar plate 4 is treated by silver plating and the like to improve the conductivity and corrosion resistance. Selecting silicon rubber as a sealing gasket 10 for the periphery of a public pipeline, wherein the height value of the sealing gasket is equal to the sum of the heights of a cathode flow field plate 2 and a cathode current collecting plate 3 after the assembled battery is compressedAnd (5) conforming and assembling for fitting. As shown in fig. 1, two membrane electrodes 8 and 9 are combined with a complete bipolar plate, so that the anode side plate 1 and the membrane electrode 8 are sealed and enclosed to form a fuel gas transmission channel; the anode side plate 1 and the cathode flow field plate 2 surround to form a cooling air channel. The flow field part of the cathode flow field plate 2, the cathode current collecting plate 3 and the other membrane electrode 9 are encircled to form an air channel participating in electrochemical reaction. A150-energy-saving stack is assembled by a plurality of groups of the components in series, and when the temperature of room temperature is 20 ℃ and the relative humidity is 35 percent, the partial pressure (gauge pressure) of fuel hydrogen is 0.05MPa, and when air cooling heat dissipation is adopted, the current density reaches 0.7A/cm2The output power reaches 6.3kW, and the performance of the galvanic pile is shown in figure 4. The mass specific power calculated according to the invention is 900W/kg, which is much higher than 250W/kg of the graphite bipolar plate stack. This means that, when 6.3kW of electricity is generated externally at the same time, the weight of the ultra-light metal bipolar plate stack of the present invention is 7kg, while the weight of the graphite bipolar plate stack is 25.2 kg. The ultra-light metal bipolar plate stack technology can have 18kg more load or carry 1.8kg more hydrogen (calculated according to 10% hydrogen storage rate) to realize longer flight time compared with the graphite bipolar plate stack technology when the ultra-light metal bipolar plate stack technology is used on an unmanned aerial vehicle.
The thin metal bipolar plate of the present invention has all the functions of a bipolar plate: including the delivery and distribution of fuel gas, oxidant gas (air), and cooling air; discharging tail gas, reaction products and cooling air; collection, delivery and conduction of electrical current; the heat generated by the electrochemical reaction is discharged.
Example 2
Three thin metal plate parts are selected to be a titanium alloy anode side polar plate 1 with the thickness of 0.08mm, an aluminum cathode flow field plate 2 with the thickness of 0.3mm and a copper cathode collector plate 3 with the thickness of 0.02mm respectively. The flow field part of the cathode side polar plate 2 is pressed into a corrugated shape with the height of 1mm and the gap width of 1.5mm, and meanwhile, the cathode collector plate 3 with the aperture of 1.5mm and the aperture ratio of 40% is manufactured. The cathode side plate 2 and the cathode collector plate 3 are welded together by laser welding, and then the anode side plate and the cathode flow field plate 2 are welded together by laser welding to form the complete bipolar plate 4. See example 1 for additional experimental procedures. Assembled into 70-power-saving stacks at room temperature of 18℃,When the relative humidity is 31 percent, the partial pressure (gauge pressure) of the fuel hydrogen is 0.05MPa, and the current density reaches 0.5A/cm when air cooling heat dissipation is adopted2The output power reaches 2.4 kW. The mass specific power calculated according to the invention is 950W/kg, which is much higher than 250W/kg of the graphite bipolar plate stack.
Example 3
Three thin metal plate parts are selected, namely a titanium anode side polar plate 1 with the thickness of 0.3mm, an aluminum alloy cathode flow field plate 2 with the thickness of 0.1mm and a stainless steel cathode collector plate 3 with the thickness of 0.05. The flow field part of the cathode side polar plate 2 is pressed into a corrugated shape with the height of 0.5mm and the gap width of 1.5mm, and meanwhile, the cathode collector plate 3 with the aperture of 2.5mm and the aperture ratio of 30% is manufactured. The cathode side plate 2 and the cathode collector plate 3 are welded together by resistance welding, and then the anode side plate and the cathode flow field plate 2 are welded together by laser welding to form the complete bipolar plate 4. See example 1 for additional experimental procedures. Assembling to 70 power saving stack, when the room temperature is 22 deg.C and the relative humidity is 36%, the fuel hydrogen partial pressure (gauge pressure) is 0.05MPa, and when the air cooling is adopted for heat dissipation, the current density reaches 0.5A/cm2The output power reaches 2.2 kW.
Example 4
Three thin metal plate parts are selected, namely a nickel alloy anode side plate 1 with the thickness of 0.06mm, a stainless steel cathode flow field plate 2 with the thickness of 0.06mm and a copper cathode collector plate 3 with the thickness of 0.03 mm. The flow field part of the cathode side polar plate 2 is pressed into a corrugated shape with the height of 1mm and the gap width of 2mm, and meanwhile, the cathode collector plate 3 with the aperture of 1.5mm and the aperture ratio of 55% is manufactured. The cathode side plate 2 and the cathode collector plate 3 are welded together by resistance welding, and then the anode side plate and the cathode flow field plate 2 are welded together by laser welding to form the complete bipolar plate 4. See example 1 for additional experimental procedures. Assembling to 70 power saving stack, at room temperature of 25 deg.C and relative humidity of 40%, when fuel hydrogen partial pressure (gauge pressure) is 0.05MPa, and air cooling is adopted for heat dissipation, current density reaches 0.6A/cm2The output power reaches 2.8 kW.
While the present invention has been described with respect to a simple construction of a metal stamped bipolar plate, it will be understood by those skilled in the art that the present invention is illustrative of only one embodiment of the invention and is not intended to be limiting. Any modification, scaling of the dimensional structures, equivalent replacement or improvement made within the spirit and principle of the present invention shall be included in the scope of protection of the present invention.
Claims (10)
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| CN117102652A (en) * | 2023-08-25 | 2023-11-24 | 浙江天能氢能源科技有限公司 | Ultrasonic welding method of metal bipolar plates for fuel cells |
| CN118352588A (en) * | 2024-06-18 | 2024-07-16 | 液流储能科技有限公司 | Ion conducting membrane and preparation method and application thereof |
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