CN115579484B - Fuel cell and electrode plate for fuel cell - Google Patents
Fuel cell and electrode plate for fuel cell Download PDFInfo
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- CN115579484B CN115579484B CN202211379593.8A CN202211379593A CN115579484B CN 115579484 B CN115579484 B CN 115579484B CN 202211379593 A CN202211379593 A CN 202211379593A CN 115579484 B CN115579484 B CN 115579484B
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- 239000000446 fuel Substances 0.000 title claims abstract description 53
- 239000012528 membrane Substances 0.000 claims abstract description 76
- 239000000758 substrate Substances 0.000 claims abstract description 48
- 238000002955 isolation Methods 0.000 claims abstract description 22
- 239000000376 reactant Substances 0.000 claims abstract description 20
- 239000002737 fuel gas Substances 0.000 claims description 54
- 239000007789 gas Substances 0.000 claims description 53
- 230000001590 oxidative effect Effects 0.000 claims description 51
- 239000002826 coolant Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 24
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 description 31
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- 238000006243 chemical reaction Methods 0.000 description 10
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- 150000001768 cations Chemical class 0.000 description 6
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Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
-
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
-
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
-
- 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]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Fuel Cell (AREA)
Abstract
The application discloses a fuel cell and a polar plate thereof. At least two modules are arranged on the substrate of the polar plate along a first direction, each module comprises: at least one distribution unit located on the first surface of the substrate for supplying a first reactant to the membrane electrode assembly of the fuel cell; at least one first through hole which is positioned at one side of the distribution unit and penetrates through the substrate, and is respectively connected with the distribution unit through a transverse opening on the side wall of the first through hole so as to flow in a first reactant; the first through holes and the second through holes are arranged opposite to each other at two sides of the distribution unit; wherein, be provided with the isolation arris between adjacent module to realize the individual seal of every module. Through unitization and modularized double expansion, a fuel cell stack with multiple modules and capable of stably maintaining high power output for a long time is formed.
Description
Technical Field
The present application relates to fuel cells, and more particularly, to fuel cells and plates for fuel cells.
Background
The fuel cell is a power generation device that obtains electric energy by electrochemically reacting fuel such as methanol or hydrogen with an oxidizing gas in a catalyst layer of a membrane electrode assembly. The fuel cell includes a membrane electrode assembly, and first and second electrode plates respectively located on opposite sides of the membrane electrode assembly. The membrane electrode assembly includes an electrolyte membrane, and a catalyst layer and a diffusion layer on both side surfaces of the electrolyte membrane. The first electrode plate and the second electrode plate are used for conveying fuel gas and oxidizing gas to the membrane electrode assembly respectively.
The first surface of the first substrate is, for example, an anode surface adjacent to the membrane electrode assembly, and the second surface is, for example, one of a cathode surface, a cooling surface, and a flat surface. The first surface of the second substrate is, for example, a cathode surface adjacent to the membrane electrode assembly, and the second surface is, for example, one of an anode surface, a cooling surface, and a flat surface. Corresponding flow field structures are respectively formed on the anode face, the cathode face and the cooling face and are used for uniformly distributing one of fuel gas, oxidizing gas and cooling medium.
During operation of the fuel cell, fuel gas and oxidant gas are transferred to opposite surfaces of the membrane electrode assembly through the flow channels of the flow field structure of the anode face, respectively. The transfer process inside the membrane electrode assembly is such that the fuel gas diffuses through the diffusion layer to the anode catalytic layer and the oxidizing gas diffuses through the cathode catalytic layer. On the anode side of the membrane electrode assembly, the fuel gas emits electrons to form cations by the catalyst of the catalyst layer. Electrons are transferred from the catalyst surface to the first plate via the diffusion layer, from the first plate to the external circuit, and from the external circuit to the second plate. The cations are transferred to the cathode catalyst layer via the electrolyte membrane. On the cathode side of the membrane electrode assembly, electrons are transferred from the second plate to the diffusion layer and from the diffusion layer to the cathode catalyst layer. The oxidizing gas combines with electrons transferred from the anode on the cathode catalyst layer to form anions, and the anions combine with cations transferred through the electrolyte membrane to form water, thereby forming an integrated electronic circuit and an ion circuit. The electrolyte membrane has the functions of ion channel and blocking gas and electrons.
The plate structure of the fuel cell has an important influence on the electrochemical performance and output power of the fuel cell. With the development of technology, the fuel cell is gradually introduced into the fields of heavy commercial vehicles, ships, energy storage and the like, and has great market potential, so that more urgent requirements are put on a high-power fuel cell stack.
The power of the existing fuel cell single stack in the industry is most common at the level of 80-150kw, but for a fuel cell system with higher power, a plurality of stacks are usually required to be combined in series to realize higher power output, but the mode of multi-stack combination is more complex, and the system integration and insulation and heat dissipation during operation are all required to be excessively high; meanwhile, the complex control system also reduces the effective available power of the power generation system, and greatly reduces the efficiency of the power generation system.
Thus, there is a need in the industry for better solutions to improve the electrochemical performance and the power per stack of fuel cells using an improved design of the plate structure.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a fuel cell and a plate for a fuel cell, which are unitized and modularly expanded in different directions of the plate to form a plurality of modules isolated from each other and sealed, and a fuel cell stack having a plurality of modules that can stably maintain a high power output for a long period of time.
According to a first aspect of the present invention, there is provided a plate for a fuel cell, provided with at least two modules arrayed in a first direction on a substrate of the plate, each module comprising: at least one distribution unit located on the first surface of the substrate for supplying a first reactant to the membrane electrode assembly of the fuel cell; at least one first through hole located at one side of the distribution unit and penetrating the substrate, and connected with the corresponding distribution unit through the lateral opening on the side wall of the first through hole for flowing in the first reactant; and at least one second through hole which is positioned at the other side of the distribution unit and penetrates through the substrate, and is respectively connected with the corresponding distribution unit through a transverse opening on the side wall of the second through hole so as to flow out the first reactant, wherein the first through hole and the second through hole are arranged opposite to each other at two sides of the distribution unit; wherein, be provided with the isolation arris between adjacent module to realize the individual seal of every module.
Preferably, each module comprises a plurality of distribution units arranged in an array along a second direction on the substrate, the second direction being perpendicular to the first direction.
Preferably, adjacent modules are provided with adjacent sealing areas, and the width of the adjacent sealing areas is smaller than that of the sealing areas at the edges of the substrate.
Preferably, the width of the adjacent sealing area is 2mm-15mm.
Preferably, each module further comprises: at least one third through hole penetrating the substrate for flowing in a second reactant; at least one fourth through hole penetrating the substrate for flowing out the second reactant; wherein the at least one third through hole and the at least one fourth through hole are located at both sides of the distribution unit, respectively.
Preferably, each module further comprises: at least one fifth through hole penetrating the substrate for flowing in a cooling medium; at least one sixth through hole penetrating the substrate for flowing out the cooling medium; wherein the at least one fifth through hole and the at least one sixth through hole are located at both sides of the dispensing unit, respectively.
Preferably, each module further comprises: and the at least one cooling unit is positioned on the second surface of the substrate, is connected with the at least one fifth through hole and the at least one sixth through hole and is used for supplying cooling medium to the second surface of the substrate.
Preferably, the at least one first through hole, the at least one fourth through hole and the at least one sixth through hole are all located on the same side of the dispensing unit, and the at least one second through hole, the at least one third through hole and the at least one fifth through hole are all located on the other side of the dispensing unit.
Preferably, the at least one first through hole, the at least one fourth through hole and the at least one sixth through hole are arranged in a row on the same side of the dispensing unit in the order of the fourth through hole, the sixth through hole, the first through hole, the at least one second through hole, the at least one third through hole and the at least one fifth through hole are arranged in a row on the other side of the dispensing unit in the order of the second through hole, the third through hole, the fifth through hole.
Preferably, the electrode plate is a dual-module electrode plate, a first module and a second module are arranged on a substrate of the electrode plate along a first direction in an array manner, the first module is adjacent to the second module, a first isolation edge is arranged between the first module and the second module, and a second through hole, a third through hole and a fifth through hole of the first module and the second module are adjacent to the first isolation edge.
Preferably, the first reactant is fuel gas, the second reactant is oxidizing gas, the oxidizing gas and the cooling medium flow in from the middle of the two-module polar plate and flow out from the two sides of the two-module polar plate, and the fuel gas flows in from the two sides of the two-module polar plate and flows out from the middle of the two-module polar plate.
Preferably, the at least one distribution unit comprises respectively: a first flow field structure comprising a plurality of first flow channels separated from each other by a plurality of ridges, the plurality of first flow channels extending from an inlet side of the first flow field structure to an outlet side of the first flow field structure; the first diversion structure comprises a plurality of first diversion grooves which are separated from each other by a plurality of first side walls, the plurality of first diversion grooves are distributed radially and extend from the transverse openings of the corresponding first through holes to the inlet side of the first flow field structure; the second diversion structure comprises a plurality of second diversion grooves with a plurality of second side walls which are separated from each other, the second diversion grooves are distributed in a radial mode, and the second diversion grooves extend from the transverse openings of the corresponding second through holes to the outlet side of the first flow field structure.
Preferably, the first flow channels of the first flow field structure are any one of linear, curved and serpentine flow channels.
According to a second aspect of the present invention, there is provided a fuel cell comprising: at least one repeating unit including a first electrode plate including an anode surface in contact with the membrane electrode assembly to distribute a fuel gas, a second electrode plate including a cathode surface in contact with the membrane electrode assembly to distribute an oxidizing gas, and a membrane electrode assembly sandwiched therebetween; and a clamping device comprising a first end plate, a second end plate, and a connecting member for connecting the first end plate and the second end plate, the connecting member being for fixing the at least one repeating member between support surfaces of the first end plate and the second end plate opposite to each other in a stacked state, wherein the first electrode plate is the electrode plate described in the foregoing.
According to a third aspect of the present invention, there is provided a fuel cell comprising: at least one repeating unit comprising a first electrode plate, a first membrane electrode assembly, a common electrode plate, a second membrane electrode assembly, and a second electrode plate, the first membrane electrode assembly being positioned between the first electrode plate and the common electrode plate, the second membrane electrode assembly being positioned between the second electrode plate and the common electrode plate, the first electrode plate comprising an anode face in contact with the first membrane electrode assembly to distribute a fuel gas, the common electrode plate comprising a cathode face in contact with the first membrane electrode assembly to distribute an oxidizing gas, the common electrode plate further comprising an anode face in contact with the second membrane electrode assembly to distribute a fuel gas, the second electrode plate comprising a cathode face in contact with the second membrane electrode assembly to distribute an oxidizing gas; and a clamping device including a first end plate, a second end plate, and a connecting member for connecting the two, the connecting member being for fixing the at least one repeating member between support surfaces of the first end plate and the second end plate opposite to each other in a stacked state, wherein the first electrode plate is the electrode plate according to any one of the above.
The polar plate adopts a unitization and modularization dual-expansion mode, performs unitization expansion in the Y-axis direction and modularization expansion in the X-axis direction, can be selectively expanded into dual-module, three-module or more than three multi-module according to power requirements, is flexible in expansion, and provides feasibility for realizing hundred-watt-level, kilowatt-level high-power or ultra-high-power galvanic piles. The adjacent modules are also provided with isolation ribs, and further, the adjacent modules share an adjacent sealing area in the middle, the width of the adjacent sealing area is not larger than that of the edge sealing area, so that the area of the sealing area of the polar plate can be reduced, the active reaction area of the polar plate is increased by 5% -12%, and the power density of the electric pile is improved; meanwhile, the independent sealing of the module is realized through the isolation ribs in the middle of the adjacent sealing areas, so that the sealing pressure of the large-area polar plates can be reduced, the sealing performance of the fluid between the battery polar plates is improved, and the risk of fluid leakage is reduced.
Further, the through holes of the cooling medium in each unit are positioned between the through holes of the fuel gas and the oxidizing gas, and the design can effectively improve the area utilization rate of the polar plate; corresponding current distribution modes can be set according to the number of modules in the polar plate. For the two-module polar plate or the multi-module polar plate, two adjacent modules can be used as a group, and a flow distribution mode of oxidizing gas and cooling medium with two-side input and two-side output and fuel gas with two-side input and two-side output is adopted, so that the mass transfer capacity and the utilization rate of the fuel gas are improved, the air inlet piezoresistance and the permeability of the oxidizing gas are reduced, the high-current continuous discharge capacity of a galvanic pile is enhanced, and the stability of high-power output of the galvanic pile is enhanced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows a plan view of a first surface of a first plate in a fuel cell according to an embodiment of the present invention;
FIG. 2 shows an enlarged partial schematic view of a first plate single distribution unit in a fuel cell according to an embodiment of the present invention;
fig. 3 shows a plan view of a second surface of a first plate in a fuel cell according to an embodiment of the invention;
fig. 4 shows a plan view of a first surface of a second plate in a fuel cell according to an embodiment of the present invention;
FIG. 5 shows a schematic view of the flow direction of each fluid in a plate in a fuel cell according to an embodiment of the invention;
fig. 6 shows a schematic cross-sectional view of a first repeating component of a fuel cell according to an embodiment of the invention;
fig. 7 shows a schematic cross-sectional view of a second repeating component of a fuel cell according to an embodiment of the invention;
fig. 8 shows a schematic perspective view of a clamping device of a fuel cell according to an embodiment of the present invention.
Description of the embodiments
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a plan view of a first surface of a first plate in a fuel cell according to an embodiment of the present invention, in which the first plate 100 includes a substrate 10, the substrate 10 having a substantially rectangular shape including a first side and a second side extending in an X direction and opposite to each other, and a third side and a fourth side extending in a Y direction and opposite to each other, the substrate 10 being provided with a first module 1 and a second module 2 in an array in the X direction, and a separation rib 3 being provided between the first module 1 and the second module 2 to achieve individual sealing of each module. Further, the first to fourth sides of the substrate 10 are each provided with an edge sealing region, and between adjacent modules of the substrate 10, the region where the isolation rib 3 is located is provided with an adjacent sealing region, the width D of the adjacent sealing region is not greater than the width D of the edge sealing region, specifically, the width D of the adjacent sealing region is, for example, 2mm to 15mm.
The substrate 10 is further provided with a tab 4, and the tab 4 is located on a first side of the substrate 10, for example, and is close to an included angle between the first side and a fourth side of the substrate 10. The tab 4 can also be connected to a detection device as a conductive terminal. Preferably, the tab 4 further includes a positioning slot and/or a connection hole for positioning and connection when assembled in a stack.
The tab 4 is removed, the first module 1 on the substrate 10 is mirrored by taking the isolation rib 3 as a symmetry plane, so that the second module 2 on the substrate 10 can be obtained, and the second module 2 and the first module 1 are mirrored by taking the isolation rib 3 as a symmetry plane, so that only the first module 1 is selected for detailed description, and the similar structure in the second module 2 is not repeated.
The first module 1 includes a plurality of distribution units 120 arranged in an array along the Y direction (extending directions of the third side and the fourth side), and each of the left and right sides of the distribution units 120 further includes a set of through holes corresponding thereto, and in the embodiment shown in fig. 1, the first electrode plate 100 is, for example, an anode electrode plate, the first plane is an anode surface, the substrate 10 has the functions of dispersing fuel gas and conducting electrons, and may be made of materials with high mechanical strength and excellent electrical conductivity, such as graphite, stainless steel, titanium alloy, aluminum alloy, copper alloy, and the like. The first module 1 comprises, for example, 5 distribution units 120, each of which has a width H of, for example, 15-100mm; the side of the distribution unit 120 close to the third side edge is provided with a first through hole 111, and the side of the distribution unit 120 close to the isolation rib 3 is provided with a second through hole 112; the fuel gas is connected to the corresponding distribution unit 120, for example, through a lateral opening on the sidewall of the first through hole 111 to flow in the fuel gas; the fuel gas flows through the distribution unit 120 and then flows out from the lateral openings on the side walls of the second through holes 112 to the second through holes 112.
Fig. 2 is a partially enlarged schematic view of the area a of the single dispensing unit in fig. 1, and by enlarging the single dispensing unit to better reveal its specific structure, as shown in fig. 2, a plurality of groups of through holes arranged in a row along the Y direction are formed at one side (near the third side) of the dispensing unit, and each group of through holes includes a fourth through hole 114, a sixth through hole 116 and a first through hole 111 arranged in sequence. On the other side of the distribution unit (near the separation edge 3) there are also formed a plurality of sets of through-holes aligned in the Y-direction, each set comprising a second through-hole 112, a fifth through-hole 115 and a third through-hole 113 aligned in sequence, wherein the first through-hole 111 and the second through-hole 112 are for example for the inflow and outflow of a first reactant, respectively, the third through-hole 113 and the fourth through-hole 114 are for example for the inflow and outflow of a second reactant, respectively, and the fifth through-hole 115 and the sixth through-hole 116 are for example for the inflow and outflow of a cooling medium, respectively. Specifically, the first reactant is, for example, a fuel gas, and the second reactant is, for example, an oxidizing gas, and the arrangement is such that the fifth through-hole 115 and the sixth through-hole 116 for flowing through the cooling medium are located between the through-holes for flowing through the fuel gas and the oxidizing gas, and heat exchange can be performed in the regions of the through-holes to adjust the temperature of the fuel cell.
The distribution unit 120 includes a first flow guiding structure 121, a first flow field structure 123 and a second flow guiding structure 122, wherein the first flow guiding structure 121 is located between the lateral opening of the first through hole 111 and the inlet of the first flow field structure 123, and the first flow guiding structure 121 has radial flow channels, for example, which gradually diverges from the direction of the first through hole 111 toward the inlet of the first flow field structure 123 and the flow channels of the first flow guiding structure 121 correspond to the flow channels of the first flow field structure 123; the second flow guiding structure 122 has, for example, the same radial flow channel, and the second flow guiding structure 122 gradually diverges from the second through hole 112 toward the outlet of the first flow field structure 123; the second flow guiding structure 122 is located between the lateral opening of the second through hole 112 and the outlet of the first flow field structure 123.
The first flow field structure 123 comprises a plurality of flow channels extending from the inlet to the outlet, the plurality of flow channels being separated from each other by ridges, the width W of the first flow field structure 123 being for example 30mm-200mm, the width of the ridges being for example 0.05mm-0.5mm, the width of each flow channel being for example 0.02mm-0.4mm, the depth of the flow channels being for example 0.03mm-0.5mm, the flow channels in the first flow field structure 123 being of various designs such as linear, curved or serpentine flow channels, in the embodiment shown in fig. 2, serpentine flow channels extending in the X-direction as well as the Y-direction are used. Preferably, the serpentine flow channel design is adopted to increase the flow path length of the fuel gas, so that the piezoresistance of the fuel gas passing through the flow field is increased, the fuel gas is more uniformly distributed in the flow channel, the moisture retention capacity of the fuel gas is enhanced, the concentration of the fuel gas in the plane direction can be increased, the reaction is more complete, the energy loss of the reaction is reduced, and the utilization rate of the fuel gas is improved.
Fig. 3 shows a plan view of a second surface of a first plate in a fuel cell according to an embodiment of the present invention, the second surface being opposite to the first surface, for example, a cooling surface, the second surface being similar to the first surface and having a plurality of cooling units corresponding to the first surface, taking as an example one cooling unit closest to a fourth side of the first module 1 in fig. 3, the cooling unit comprising: a third flow directing structure 131, a cooling flow field structure 133, and a fourth flow directing structure 132. The third flow guiding structure 131 is located between the transverse opening of the fifth through hole 115 and the inlet of the cooling flow field structure 133, the fourth flow guiding structure 132 is located between the transverse opening of the sixth through hole 116 and the outlet of the cooling flow field structure 133, the third flow guiding structure 131 and the fourth flow guiding structure 132 correspond to the flow channels in the cooling flow field structure 133, the cooling flow field structure 133 adopts a curved flow channel design, and comprises a first part extending along the transverse direction (X-axis direction) and a second part extending along the longitudinal direction (Y-axis direction), the curved flow channel design can increase the circulation path length of the cooling medium, reduce the flow speed of the cooling medium, increase the heat transfer efficiency, improve the cooling effect, provide good heat dissipation capacity for the first polar plate, and specifically, the ridge width in the cooling flow field structure 133 is 0.1mm-2mm, the groove width is 0.1mm-2mm, and the groove depth is 0.03mm-0.5mm.
Fig. 4 shows a plan view of a first surface of a second plate in a fuel cell according to an embodiment of the present invention; the second polar plate is, for example, a cathode polar plate, and is matched with the first polar plate, the second polar plate 200 comprises a substrate 20, the first module 1 and the second module 2 are arranged in an array manner in the transverse direction of the substrate 20, and an isolation rib 3 is also arranged between the first module 1 and the second module 2 so as to realize independent sealing of each module. The isolation ribs 3 and the sealing regions on the substrate 20 correspond to those of the first electrode plate 100, and the dimensions and positions thereof are not described herein. One side of the substrate 20 is provided with a tab 4, and the first surface of the second electrode plate 200 is opposite to the first surface of the first electrode plate 100, that is, the first module 1 of the second electrode plate 200 is opposite to the second module of the first electrode plate 100, and the second module 2 of the second electrode plate 200 is opposite to the first module of the first electrode plate 100. Taking the first module 1 of the second polar plate 200 as an example, it is also provided with 5 distribution units in an array along the Y direction, each distribution unit having a width of 15mm-100mm, for example; three sets of through holes are also provided on the left and right sides of each distribution unit, wherein the first through hole 111 and the second through hole 112 are for example for inflow and outflow of fuel gas, respectively, the third through hole 113 and the fourth through hole 114 are for example for inflow and outflow of oxidizing gas, respectively, and the fifth through hole 115 and the sixth through hole 116 are for example for inflow and outflow of cooling medium, respectively.
The oxidizing gas flows into the second flow field structure 143 via the fifth flow guiding structure 141, for example, through the lateral openings on the sidewall of the third through hole 113; the oxidizing gas flows through the second flow field structure 143 and then flows out from the lateral opening on the sidewall of the fourth through hole 114 to the fourth through hole 114 through the sixth flow guiding structure 142. The fifth flow guiding structure 141 has radial flow channels, which gradually diverges from the direction of the third through hole 113 toward the inlet of the second flow field structure 143, and the fifth flow guiding structure 141 corresponds to the flow channels of the second flow field structure 143; the sixth flow guiding structure 142 has, for example, the same radial flow channel design, and the sixth flow guiding structure 142 diverges gradually from the fourth through hole 114 toward the outlet of the second flow field structure 143.
The second flow field structure 143 comprises, for example, a plurality of flow channels extending from an inlet to an outlet, the plurality of flow channels being separated from each other by ridges, the second flow field structure 143 preferably being a linear flow channel, the second flow field structure 143 having a width of 30mm to 200mm, a ridge width of 0.02mm to 0.4mm, a groove width of 0.05mm to 0.5mm, and a groove depth of 0.03mm to 0.5mm. The design of the second flow field structure 143 is beneficial to reducing the piezoresistance of the cathode surface (first surface) of the second polar plate 200 and to discharging generated water, thereby reducing the flooding phenomenon of the galvanic pile and improving the high-current stable discharging capacity of the galvanic pile.
The second surface of the second plate 200 is similar to the second surface of the first plate 100, and is also a cooling surface, and the same cooling surface design can be used, which is not described herein.
FIG. 5 shows a schematic view of the flow direction of each fluid in a plate in a fuel cell according to an embodiment of the invention; taking a two-module plate having two modules of the first module 1 and the second module 2 as an example, in fig. 5, the flow directions of the fuel gas, the oxidizing gas and the cooling medium are respectively identified by solid arrows, dashed arrows and dot-dash arrows, and it can be seen from fig. 5 that in the first module 1, the fuel gas flows in through the first through holes 111 and flows out through the second through holes 112, i.e., flows from the side edges of the plate to the isolation ribs 3; the oxidizing gas flows in through the third through holes 113 and flows out through the fourth through holes 114; the cooling medium flows in through the fifth through hole 115 and flows out through the sixth through hole 116; i.e. the oxidizing gas and the cooling medium flow from the separation rib 3 to the side of the plate. In the second module 2 as well, similarly to the first module 1, the fuel gas flows in through the first through holes 211 and flows out through the second through holes 212, i.e., flows from the side of the plate to the isolation rib 3; the oxidizing gas flows in through the third through hole 213 and flows out through the fourth through hole 214; the cooling medium flows in through the fifth through hole 215 and flows out through the sixth through hole 216; i.e. the oxidizing gas and the cooling medium flow from the separation rib 3 to the side of the plate. In the two-module polar plate, through adopting the flow distribution mode that the oxidizing gas and the cooling medium are input from the middle and output from the two sides, the fuel gas is input from the two sides and output from the middle, the mass transfer capacity and the utilization rate of the fuel gas are improved, the air inlet pressure resistance and the permeability of the oxidizing gas are reduced, the large-current continuous discharge capacity of the galvanic pile can be obviously enhanced, and the running stability of the galvanic pile is improved.
Of course, although fig. 5 only shows the flow distribution design of the two-module polar plate, more than two modules of polar plates are provided, the polar plates can be grouped according to the two modules, similar flow distribution design is adopted, and the material flow directions between the adjacent modules are mirror images of each other by taking the isolation edges as the symmetry planes, so that the polar plates have similar technical effects.
Fig. 6 shows a schematic cross-sectional view of a first repeating component of a fuel cell according to an embodiment of the invention; the first repeating unit includes a first electrode plate 100 and a second electrode plate 200, the first electrode plate 100 and the second electrode plate 200 being spaced apart from each other with a first surface thereof facing each other with a membrane electrode assembly 300 interposed therebetween; the three are stacked in the longitudinal direction such that each through-hole forms a corresponding plurality of sets of main pipes 110 in the longitudinal direction to transport the fuel gas, the oxidizing gas, and the cooling medium, respectively. The first polar plate 100 and the second polar plate 200 are respectively provided with an isolation edge 3 at one side adjacent to the first module 1 and the second module 2 so as to isolate the two modules, so that the two modules are sealed independently, and the tightness of a main pipeline near the adjacent area is enhanced.
The membrane electrode assembly 300 includes an electrolyte membrane 31, an anode catalyst layer 32, and an anode diffusion layer 34 stacked in this order on a first surface (fuel gas side) of the electrolyte membrane 31; a cathode catalyst layer 33, a cathode diffusion layer 35 are stacked in this order on the second surface (oxidizing gas side) of the electrolyte membrane 31; and a border 36 surrounding the layers in the non-reactive zone.
The electrolyte membrane 31 is a permselective membrane that transports protons and has a function of insulating electrons. The electrolyte membrane 31 is largely classified into a fluorine-based electrolyte membrane and a hydrocarbon-based electrolyte membrane by the kind of the ion exchange resin as a constituent material. Among them, the fluorine electrolyte membrane is excellent in heat resistance and chemical stability because of having a c—f bond. For example, as an electrolyte membrane, a perfluorosulfonic acid membrane known by the trade name of Nafion (registered trademark, dupont limited) is widely used.
The anode catalyst layer 32 contains an electrode catalyst supporting a catalyst component and a polymer. The electrode catalyst has a function of promoting a reaction (oxyhydrogen reaction) of dissociating hydrogen into protons and electrons. The electrode catalyst has a structure in which a catalyst component such as platinum is supported on a surface of a conductive carrier made of carbon or the like, for example.
The cathode catalyst layer 33 contains an electrode catalyst supporting a catalyst component and a polymer. The electrode catalyst has a function of promoting a reaction (oxygen reduction reaction) of generating water from protons and electrons and oxygen. The electrode catalyst has a structure in which a catalyst component such as platinum is supported on a surface of a conductive carrier made of carbon or the like, for example.
The anode diffusion layer 34 and the cathode diffusion layer 35 are respectively composed of porous loose conductive materials such as porous carbon paper materials, and the anode diffusion layer 34 and the cathode diffusion layer 35 uniformly diffuse the fuel gas and the oxidizing gas from the flow channels of the flow field onto both side surfaces of the catalytic layer of the electrolyte membrane 31, respectively, so that the fuel gas and the oxidizing gas are respectively brought into contact with the anode catalyst layer 32 and the cathode catalyst layer 33.
A first surface of the first plate 100, in which a fuel gas flow field is formed, is in contact with the anode diffusion layer 34 in the membrane electrode assembly 300.
The fuel gas flow field includes a plurality of first flow field structures 123 connected to a first set of main lines and extending laterally, the flow field structures of the first plate 100 being open on a first surface, the fuel gas being transferred in the direction of the first flow field structures 123 and delivered to the anode side of the membrane electrode assembly 300.
The first surface of the second plate 200 is in contact with the cathode diffusion layer 35 in the membrane electrode assembly 300, and an oxidizing gas flow field is formed in the first surface. The oxidizing gas flow field includes a plurality of second flow field structures 223 connected to the second set of main lines and extending laterally, the second flow field structures 223 of the second plate 200 being open on the first surface, the oxidizing gas being transferred along the direction of the second flow field structures 223 and delivered to the cathode side of the mea 300.
On the anode side of the membrane electrode assembly 300, the fuel gas diffuses to the anode catalyst layer 32 through the anode diffusion layer 34 of the membrane electrode assembly 300, and the fuel gas generates cations and electrons through electrochemical reaction on the anode catalyst layer 32 of the membrane electrode assembly 300, the cations migrate to the cathode side through the electrolyte membrane, and the electrons are conducted to the first electrode plate 100 through the anode diffusion layer 34. Then, the electrons are transferred from the anode side to the cathode side of the membrane electrode assembly 300 via an external circuit. On the cathode side of the membrane electrode assembly 300, electrons are conducted to the cathode diffusion layer 35 via the second electrode plate 200 and then to the cathode catalyst layer 33 of the membrane electrode assembly 300, the oxidizing gas is diffused to the cathode catalyst layer 33 through the cathode diffusion layer 35 of the membrane electrode assembly 300, the oxidizing gas combines with the electrons to form anions, and the anions combine with cations transferred through the electrolyte membrane to form water, thereby forming a current loop.
In the above-described electrochemical reaction, water is generated by chemical reaction on the surface of the cathode catalyst layer of the membrane electrode assembly 300. Further, on the cathode side of the membrane electrode assembly 300, the water generated by the reaction needs to be carried out of the active area by the advancing oxidizing gas through the flow channels of the second plate 200 due to the intimate contact of the ridges in the cathode plate flow field structure. If the generated water cannot be discharged in time, water drops are formed by aggregation in the active area, and the water drops obstruct contact between the oxidizing gas and the cathode catalyst layer, so that the cathode catalyst layer submerged by the water drops cannot perform electrochemical reaction, and a phenomenon known as flooding is generated. On the anode side of the membrane electrode assembly 300, there is water that has diffused through the electrolyte membrane reverse osmosis, and thus a "flooding" phenomenon may also occur. The occurrence of the phenomenon of flooding affects the progress of the electrochemical reaction, thereby reducing the discharge performance of the fuel cell. For fuel cells, the larger the discharge current, the more water is generated by the reaction, the more water flooding phenomenon is easy to occur, and the more the influence on the discharge performance of the cell is remarkable.
Further, the second surfaces of the first plate 100 and the second plate 200 are, for example, cooling surfaces, the second surface of the first plate 100 is provided with a cooling flow field structure 133, and the second surface of the second plate 200 is provided with a cooling flow field structure 233. In order to enhance sealability between the electrode plates and the membrane electrode assembly 300, sealing frames 40 are further provided at the first and second surfaces of the electrode plates.
Fig. 7 shows a schematic cross-sectional view of a second repeating component of a fuel cell according to an embodiment of the invention; the second repeating unit is, for example, a dual-cell design, and its main structure includes, from top to bottom, a second electrode plate, a second membrane electrode assembly 320, a common electrode plate 400, a first membrane electrode assembly 310, and a first electrode plate 100; compared with the first repeating component, the second repeating component is further provided with a common electrode plate 400 between the first electrode plate 100 and the second electrode plate 200, one side of the common electrode plate 400 facing the first electrode plate 100 is, for example, a cathode surface, and the first membrane electrode assembly 310 is arranged between the common electrode plate 400 and the first electrode plate 100 by adopting the same design as the first surface of the second electrode plate 200; the side of the common electrode plate 400 facing the second electrode plate 200 is, for example, an anode surface, and the same design as the first surface of the first electrode plate 100 is adopted, and a second membrane electrode assembly 320 is disposed between the common electrode plate 400 and the second electrode plate 200. I.e. the common plate 400 eliminates the cooling surface design, the cooling surface of the second repeating unit being located only on the second surfaces of the outermost first plate 100 and second plate 200.
Fig. 8 shows a schematic perspective view of a clamping device of a fuel cell according to an embodiment of the present invention. Specifically, the clamping device of the fuel cell is used for fixing together a plurality of repeating parts (repeat parts) stacked together. The clamping device comprises a first end plate 60 and a second end plate 70 opposite each other, and a connecting member 50 connecting opposite sides of the first end plate 60 and the second end plate 70 together.
The connection member 50 serves to connect the first and second end plates 60 and 70 together and to allow the first and second end plates 60 and 70 to apply pressure to the repeating member therebetween by adjusting the interval therebetween. The connection member 50 includes, for example, a plurality of connection bars or an integral connection plate. One end of the connection member 50 is fixed to the first end plate 60, and the other end of the connection member 50 is formed with a screw hole or a screw for coupling with the second end plate 70.
The first end plate 60 serves as a flow distribution device for the fuel gas, the oxidizing gas, and the cooling medium. The fuel gas includes gaseous hydrogen or a fluid composed of a fuel such as liquid methanol or a methanol solution. The oxidizing gas may be air or pure oxygen, and the cooling medium may be liquid or gas.
A plurality of pipe ports 61 for connecting external pipes are formed at the end surface of the first end plate 60, and a plurality of distribution holes 62 for connecting repeating members are formed at the support surface of the first end plate 60. The pipe ports 61 include respective inflow ports and outflow ports of the fuel gas, the oxidizing gas, and the cooling medium. The distribution holes 62 include a respective set of inflow holes and a respective set of outflow holes for the fuel gas, the oxidizing gas, and the cooling medium. Preferably, the line ports 61 are divided into a plurality of groups, each module corresponding to a group of line ports, and the fluid flow in the different modules is regulated by external flow control of the line ports 61.
An internal conduit is formed within the interior of the first end plate 60. The inflow ports of the fuel gas communicate with the corresponding set of inflow holes via the internal piping and the outflow ports communicate with the corresponding set of outflow holes via the internal piping, whereby the first end plate 60 supplies the fuel gas to the plates in the repeating unit via the distribution holes 62. The inflow ports of the oxidizing gas communicate with the corresponding set of inflow holes via the internal piping, and the outflow ports communicate with the corresponding set of outflow holes via the internal piping, whereby the first end plate 60 supplies the oxidizing gas to the plates in the repeating unit via the distribution holes 62. The inflow ports of the cooling medium are in communication with a corresponding set of inflow holes via the internal piping and the outflow ports are in communication with a corresponding set of outflow holes via the internal piping, whereby the first end plate 60 can supply the cooling medium to the plates (or cooling plates) in the repeating unit via the distribution holes 62 on the support surface.
Between the first end plate 60 and the second end plate 70, 100-450 first repeating units or second repeating units may be provided to form a fuel cell stack having a rated power of 100-400 kW.
The polar plate adopts a unitization and modularization dual-expansion mode, performs unitization expansion in the Y-axis direction and modularization expansion in the X-axis direction, can be selectively expanded into dual-module, three-module or more than three multi-module according to power requirements, is flexible in expansion, and provides feasibility for realizing hundred-watt-level, kilowatt-level high-power or ultra-high-power galvanic piles. The adjacent modules are also provided with isolation ribs, and further, the adjacent modules share an adjacent sealing area in the middle, the width of the adjacent sealing area is not larger than that of the edge sealing area, so that the area of the sealing area of the polar plate can be reduced, the active reaction area of the polar plate is increased by 5% -12%, and the power density of the electric pile is improved; meanwhile, the independent sealing of the module is realized through the isolation ribs in the middle of the adjacent sealing areas, so that the sealing pressure of the large-area polar plates can be reduced, the sealing performance of the fluid between the battery polar plates is improved, and the risk of fluid leakage is reduced.
Further, the through holes of the cooling medium in each unit are positioned between the through holes of the fuel gas and the oxidizing gas, and the design can effectively improve the area utilization rate of the polar plate; corresponding current distribution modes can be set according to the number of modules in the polar plate. For the two-module polar plate or the multi-module polar plate, two adjacent modules can be used as a group, and a flow distribution mode of oxidizing gas and cooling medium with two-side input and two-side output and fuel gas with two-side input and two-side output is adopted, so that the mass transfer capacity and the utilization rate of the fuel gas are improved, the air inlet piezoresistance and the permeability of the oxidizing gas are reduced, the high-current continuous discharge capacity of a galvanic pile is enhanced, and the stability of high-power output of the galvanic pile is enhanced.
It should be noted that in the description of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be apparent that the above embodiments are merely examples for clearly illustrating the present invention and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary or exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (14)
1. A plate for a fuel cell comprising at least two modules arrayed in a first direction on a substrate of the plate, the edge of the substrate having an edge seal region, adjacent modules having an adjacent seal region therebetween, the adjacent seal region having an isolation rib disposed therein, the isolation rib being part of the substrate to separate adjacent modules to effect individual sealing of each module, the width of the adjacent seal region being less than the width of the seal region at the edge of the substrate, the first and second surfaces of the plate being provided with sealing frames.
2. The pole plate of claim 1, each module comprising:
at least one distribution unit located on the first surface of the substrate for supplying a first reactant to the membrane electrode assembly of the fuel cell;
At least one first through hole located at one side of the distribution unit and penetrating the substrate, and connected with the corresponding distribution unit through the lateral opening on the side wall of the first through hole for flowing in the first reactant; and
at least one second through hole which is positioned at the other side of the distribution unit and penetrates through the substrate, and is respectively connected with the corresponding distribution unit through a transverse opening on the side wall of the second through hole so as to flow out the first reactant, wherein the first through hole and the second through hole are arranged opposite to each other at two sides of the distribution unit;
wherein each module comprises a plurality of distribution units arranged in an array along a second direction on the substrate, the second direction being perpendicular to the first direction.
3. The plate of claim 1 wherein the width of the adjoining seal area is 2mm to 15mm.
4. The pole plate of claim 2, wherein each module further comprises:
at least one third through hole penetrating the substrate for flowing in a second reactant;
at least one fourth through hole penetrating the substrate for flowing out the second reactant;
wherein the at least one third through hole and the at least one fourth through hole are located at both sides of the distribution unit, respectively.
5. The pole plate of claim 4 wherein each module further comprises:
at least one fifth through hole penetrating the substrate for flowing in a cooling medium;
at least one sixth through hole penetrating the substrate for flowing out the cooling medium;
wherein the at least one fifth through hole and the at least one sixth through hole are located at both sides of the dispensing unit, respectively.
6. The pole plate of claim 5 wherein each module further comprises: and the at least one cooling unit is positioned on the second surface of the substrate, is connected with the at least one fifth through hole and the at least one sixth through hole and is used for supplying cooling medium to the second surface of the substrate.
7. The plate of claim 5, wherein the at least one first through hole, the at least one fourth through hole, and the at least one sixth through hole are all located on the same side of the dispensing unit, and the at least one second through hole, the at least one third through hole, and the at least one fifth through hole are all located on the other side of the dispensing unit.
8. The plate of claim 7, wherein the at least one first through hole, the at least one fourth through hole, and the at least one sixth through hole are aligned in the order of the fourth through hole, the sixth through hole, the first through hole on the same side of the distribution unit, and the at least one second through hole, the at least one third through hole, and the at least one fifth through hole are aligned in the order of the second through hole, the third through hole, and the fifth through hole on the other side of the distribution unit.
9. The plate of claim 8, wherein the plate is a dual-module plate, a first module and a second module are arranged on a substrate of the plate in an array along a first direction, the first module is adjacent to the second module, a first isolation rib is arranged between the first module and the second module, and second through holes, third through holes and fifth through holes of the first module and the second module are arranged adjacent to the first isolation rib.
10. The plate of claim 9 wherein the first reactant is a fuel gas and the second reactant is an oxidizing gas, the oxidizing gas and the cooling medium flowing in from a middle inflow to a side of the dual-module plate, and the fuel gas flowing in from a side of the dual-module plate.
11. The plate of claim 1, wherein the at least one distribution unit each comprises:
a first flow field structure comprising a plurality of first flow channels separated from each other by a plurality of ridges, the plurality of first flow channels extending from an inlet side of the first flow field structure to an outlet side of the first flow field structure;
the first diversion structure comprises a plurality of first diversion grooves which are separated from each other by a plurality of first side walls, the plurality of first diversion grooves are distributed radially and extend from the transverse openings of the corresponding first through holes to the inlet side of the first flow field structure; and
the second diversion structure comprises a plurality of second diversion grooves with a plurality of second side walls which are separated from each other, the second diversion grooves are distributed in a radial mode, and the second diversion grooves extend from the transverse openings of the corresponding second through holes to the outlet side of the first flow field structure.
12. The plate of claim 11 wherein the first flow field structure plurality of first flow channels is any one of linear, curvilinear, serpentine flow channels.
13. A fuel cell comprising:
at least one repeating unit including a first electrode plate including an anode surface in contact with the membrane electrode assembly to distribute a fuel gas, a second electrode plate including a cathode surface in contact with the membrane electrode assembly to distribute an oxidizing gas, and a membrane electrode assembly sandwiched therebetween; and
A clamping device comprising a first end plate, a second end plate, and a connecting member for connecting the two, said connecting member being adapted to secure said at least one repeating member in a stacked condition between support surfaces of said first end plate and said second end plate opposite each other,
wherein the first plate is a plate according to any one of claims 1 to 12.
14. A fuel cell comprising:
at least one repeating unit comprising a first electrode plate, a first membrane electrode assembly, a common electrode plate, a second membrane electrode assembly, and a second electrode plate, the first membrane electrode assembly being positioned between the first electrode plate and the common electrode plate, the second membrane electrode assembly being positioned between the second electrode plate and the common electrode plate, the first electrode plate comprising an anode face in contact with the first membrane electrode assembly to distribute a fuel gas, the common electrode plate comprising a cathode face in contact with the first membrane electrode assembly to distribute an oxidizing gas, the common electrode plate further comprising an anode face in contact with the second membrane electrode assembly to distribute a fuel gas, the second electrode plate comprising a cathode face in contact with the second membrane electrode assembly to distribute an oxidizing gas; and
A clamping device comprising a first end plate, a second end plate, and a connecting member for connecting the two, said connecting member being adapted to secure said at least one repeating member in a stacked condition between support surfaces of said first end plate and said second end plate opposite each other,
wherein the first plate is a plate according to any one of claims 1 to 12.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209200075U (en) * | 2019-01-26 | 2019-08-02 | 杭州德海艾科能源科技有限公司 | A kind of parallel-connection type hydraulic galvanic battery electrode frame |
| CN111293325A (en) * | 2020-04-28 | 2020-06-16 | 北京朔景新能源科技有限公司 | Fuel cell, and bipolar plate assembly for fuel cell |
| CN212113903U (en) * | 2020-06-23 | 2020-12-08 | 未势能源科技有限公司 | Fuel cell stack and fuel cell power generation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209200075U (en) * | 2019-01-26 | 2019-08-02 | 杭州德海艾科能源科技有限公司 | A kind of parallel-connection type hydraulic galvanic battery electrode frame |
| CN111293325A (en) * | 2020-04-28 | 2020-06-16 | 北京朔景新能源科技有限公司 | Fuel cell, and bipolar plate assembly for fuel cell |
| CN212113903U (en) * | 2020-06-23 | 2020-12-08 | 未势能源科技有限公司 | Fuel cell stack and fuel cell power generation device |
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