CN112993312B - High-temperature methanol fuel cell stack with spaced cooling cavities - Google Patents

High-temperature methanol fuel cell stack with spaced cooling cavities Download PDF

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CN112993312B
CN112993312B CN201911287591.4A CN201911287591A CN112993312B CN 112993312 B CN112993312 B CN 112993312B CN 201911287591 A CN201911287591 A CN 201911287591A CN 112993312 B CN112993312 B CN 112993312B
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cooling
plate
cathode
anode
cavities
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CN112993312A (en
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杨林林
张�浩
孙公权
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Dalian Institute of Chemical Physics of CAS
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Dalian Institute of Chemical Physics of CAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2455—Grouping of fuel cells, e.g. stacking of fuel cells with liquid, solid or electrolyte-charged reactants
    • 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
    • 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
    • H01M8/0213—Gas-impermeable carbon-containing materials
    • 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
    • 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
    • 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
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • 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
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/1233—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte with one of the reactants being liquid, solid or liquid-charged
    • 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
    • H01M8/22—Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen
    • 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
    • H01M2004/8678—Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
    • H01M2004/8694—Bipolar electrodes
    • 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

Abstract

The invention provides a high-temperature methanol fuel cell stack with spaced cooling cavities. The invention comprises the following steps: the proton exchange membrane, the bipolar plate and the cooling cavity are integrated to form the electric pile unit package. The cooling cavity comprises a first cooling plate and a second cooling plate which are detachable and can be tightly attached, and cooling oil channels which are uniformly distributed are arranged on the attaching surfaces of the first cooling plate and the second cooling plate. The invention has compact integral structure, and the integrally sealed cooling cavity and the layered bipolar plate also solve the problem that the cooling oil easily pollutes the membrane electrode in the prior art.

Description

High-temperature methanol fuel cell stack with spaced cooling cavities
Technical Field
The invention relates to the technical field of fuel cells, in particular to a high-temperature methanol fuel cell stack with spaced cooling cavities.
Background
The fuel cell is a high-efficiency power generation device which directly converts chemical energy of fuel into electric energy through chemical reaction without combustion, and has the advantages of high power generation efficiency, less environmental pollution, high reliability, easy removal of waste heat and the like, wherein the methanol fuel cell is a novel power supply which utilizes methanol aqueous solution as fuel and converts the chemical energy stored in the methanol into the electric energy. The high-temperature methanol fuel cell further increases the working temperature of a power supply compared with the working temperature of a direct methanol fuel cell or a hydrogen fuel cell, and the normal working temperature range is kept between 160 and 180 ℃. The improvement of the working temperature of the power supply is beneficial to improving the conversion efficiency of the fuel cell and ensuring that liquid water is not generated to damage the MEA (membrane electrode assembly) which is a core component of the cell in the working process of the cell.
The working principle of the high-temperature methanol fuel cell mainly comprises a diffusion layer, a catalyst layer, a proton exchange membrane and other components. The generation of electric energy in high-temperature methanol fuel cells (HTMFCs) also generates a large amount of waste heat, and therefore the formation of a corresponding cooling mechanism to carry away or utilize the waste heat is also an important means for increasing the specific power of the cell. On the other hand, the Proton Exchange Membrane (PEM) used in High Temperature Methanol Fuel Cells (HTMFC) is very sensitive to the high temperature environment inside the fuel cell, and it is necessary to maintain a uniform temperature distribution across the cross-section inside each cell to maintain the uniformity of the performance of the entire stack. A uniform temperature distribution is important to improve the reaction kinetics at the reaction sites within the electrode and to reduce the ohmic overpotential on the membrane.
Because high temperature methanol fuel cell self can produce a large amount of used heat in the course of the work, along with the increase of galvanic pile current density, the heat production volume also increases thereupon, in order to avoid and eliminate HTMFC battery to the condition that became invalid when high current density and high power density operating mode, prior art adopts coolant liquid heat conduction more, coolant liquid circulation pipeline's sealed problem appears very easily leads to membrane electrode pollution, thereby cause serious damage to the galvanic pile, simultaneously, prior art cooling system's arrangement mode also makes the inside temperature of battery inhomogeneous inadequately, the later stage maintenance volume is big.
Disclosure of Invention
In accordance with the above-identified technical problem, a high temperature methanol fuel cell stack having spaced cooling cavities is provided. The technical means adopted by the invention are as follows:
the utility model provides a high temperature methanol fuel cell pile with interval cooling chamber, includes negative pole, positive pole end plate and sets up negative pole insulation board, negative pole current collector, bipolar plate, proton exchange membrane, positive pole current collector and the positive pole insulation board between them, above-mentioned each plate all is equipped with the negative pole that is used for fuel cell normal operating, positive pole material business turn over gas pocket, and the interval proton exchange membrane, the bipolar plate that set up are integrated into pile unit package jointly with being used for its refrigerated cooling chamber, the cooling chamber includes first cooling plate and the second cooling plate that detachable can closely laminate, and first cooling plate and second cooling plate laminating face are equipped with the coolant oil passageway of evenly arranging, the two sides of bipolar plate are negative pole, positive pole runner respectively, the structure of first cooling plate and second cooling plate and adjacent plate laminating face matches with adjacent plate, and the one deck of bipolar plate is negative pole, positive pole material runner, the other layer is a cooling oil channel separated from the other layer, and each plate is provided with an inlet and an outlet for the cooling oil to enter and exit the cooling oil channel.
Furthermore, the cooling oil channel of the first cooling plate and the second cooling plate comprises a flow channel cavity and a plurality of straight partition plates protruding out of the cooling oil flow channel, each straight partition plate divides the flow channel cavity of the first cooling plate and the second cooling plate into a snake-shaped flow channel, and the area of the snake-shaped flow channel is not smaller than that of the proton exchange membrane.
Further, the straight partition plate of first cooling plate and second cooling plate is equipped with public female groove structure, and specifically, first cooling plate is equipped with the bellying, and the second cooling plate is equipped with the concave part that matches it or the second cooling plate is equipped with the bellying, and first cooling plate is equipped with the concave part that matches it, still is equipped with sealed the pad between first cooling plate and the second cooling plate.
Furthermore, a plurality of groups of fin bulges arranged in an array mode along the flow direction of cooling oil are fixedly arranged between the flow channel cavities of the first cooling plate and the second cooling plate.
Furthermore, a proton exchange membrane and a bipolar plate are arranged between the two cooling cavities at intervals, the number of the proton exchange membranes is n, and the number of the bipolar plates is n-1.
Further, n is more than or equal to 2 and less than or equal to 5.
Furthermore, the cooling oil channel of the bipolar plate is linear, and the height of any section of the flow channel cavity is the same as the specifications of the cooling oil inlet and the cooling oil outlet.
Furthermore, the runner cavity is provided with a partition plate, and the bulge on the partition plate divides the runner cavity into a plurality of thin runners with the same specification.
Furthermore, the cathode end plate and the anode end plate are provided with screw holes, and preset pretightening force is applied between the screw holes through a screw rod so as to clamp the components between the screw holes.
Furthermore, annular bulges are arranged on the surfaces of the cathode insulating plate and the anode insulating plate at the inlet and outlet holes of the cathode material and the anode material and the inlet and outlet of the cooling liquid, and sealing gaskets are arranged between the annular bulges and the cathode end plate and between the annular bulges and the anode end plate.
The cooling oil flowing through the cooling cavity is uniformly distributed, the proton exchange membrane, the bipolar plate and the cooling cavity are integrated into the cell stack unit package, the heat dissipation capacity of the whole cell stack can be greatly enhanced, and meanwhile, the cooling liquid is circulated in the cold area cavity formed by the cooling units among the cell stack units, so that the heat transfer between the cell stack units is fully isolated, and the conditions that the temperature of the middle part of the cell stack is high and the temperature of the whole cell stack at two ends is low is inconsistent due to the fact that the heat generated at the middle part of the cell stack is concentrated after the length of the cell stack is increased because the number of the cell stack is excessively saved are prevented. Overall structure is compact, and layered bipolar plate has also guaranteed when the coolant liquid flows through its cooling oil cavity, and high thermal conductivity through graphite bipolar plate self exports the heat along whole board transversely, exports the used heat that proton exchange membrane produced through graphite plate self and the coolant liquid heat transfer each other that flows through self. The integrally sealed cooling cavity and the layered bipolar plate also solve the problem that the cooling oil easily pollutes the membrane electrode in the prior art.
For the above reasons, the present invention can be widely applied to the technical field of fuel cells.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of cooling cavities and bipolar plate coolant flow channels in an embodiment of the invention.
FIG. 2 is a schematic diagram of the arrangement of the components of the stack according to the embodiment of the present invention.
FIG. 3 is a side structure view of the anode flow channel of the anode graphite plate cooling cavity of the cooling unit in the embodiment of the invention.
Fig. 4 is a serpentine flow channel structure diagram of the anode graphite plate cooling cavity of the cooling unit in the embodiment of the invention.
FIG. 5 is a side structure view of the cathode flow channel of the cathode graphite plate cooling cavity of the cooling unit in the embodiment of the invention.
Fig. 6 is a serpentine flow channel structure diagram of a cooling cavity of a cathode graphite plate of a cooling unit in an embodiment of the invention.
In the figure: 1. an end plate; 2. an insulating plate; 3. a collector plate; 4. a cooling chamber; 5. a proton exchange membrane; 6. a bipolar plate; 7. a heat dissipating fin; 8. male and female grooves (bosses); 9. male and female grooves (groove portions).
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, the present embodiment discloses a high temperature methanol fuel cell stack with an interval cooling cavity, which includes a cathode end plate, an anode end plate, and a cathode insulating plate, a cathode current collecting plate, a bipolar plate, a proton exchange membrane, an anode current collecting plate and an anode insulating plate disposed therebetween, wherein each of the plates is provided with a cathode material inlet/outlet hole and an anode material outlet hole for normal operation of the fuel cell, in the present embodiment, the cathode end plate 1 and the anode end plate 1 are made of aluminum alloy, the cathode insulating plate 2 and the anode insulating plate 2 are made of PEEK, and the cathode current collecting plate 3 and the anode current collecting plate 3 are made of stainless steel and have a carbon coating layer. The cathode end plate and the anode end plate are provided with screw holes, preset pretightening force is applied between the screw holes through the screw rods so as to clamp assemblies between the screw rods, the shape of the end plates is slightly larger than the main body shape of each assembly between the screw rods, screw rod fixing parts are arranged on the end plates, and the screw rods penetrate through the screw rod fixing parts of the cathode end plate and the anode end plate to clamp a plurality of cell packs in the middle. Annular bulges are arranged on the surfaces of the cathode insulating plate and the anode insulating plate at the inlet and outlet of cathode and anode materials and the inlet and outlet of cooling liquid, and a (fluororubber) sealing gasket is arranged between the annular bulges and the cathode and anode end plates to enhance the sealing performance, so that the sealing performance of the cathode and anode materials of the galvanic pile in and out of the galvanic pile and the sealing performance of the cooling liquid in the galvanic pile internal circulation are ensured, and in the embodiment, the height of the annular bulges is 0.2 mm. The effect of negative and positive pole insulation board is all not electrified for the end plate of guaranteeing the pile and the screw machine nut that is used for the firm end plate, completely cuts off the voltage of pile in the both ends insulation board, and the protection pile prevents the short circuit.
The shapes of the two current collecting plates of the cathode and the anode of the galvanic pile are the same as the shapes of the cathode and the anode end plates of the galvanic pile, and the positions and the shapes of the corresponding inlets and the outlets are the same as the design of the cathode and the anode end plates. The current collecting plate is used as an output port of the galvanic pile for external output access to a load or electric equipment, and the embodiment can select a standard current collecting plate, namely, two ends of the galvanic pile are respectively provided with a metal plate with good conductivity, and the metal plate is provided with a protruding part for connecting with a current collecting plate lead. The protruding portion may be at any position of the collecting plate but cannot interfere with the position of the pipe or gas path connection.
The core component of the high-temperature methanol fuel cell (HTMFC), i.e. the invention, is mainly to decompose the stack into a plurality of stack unit packs, and the alternately arranged proton exchange membranes 5, bipolar plates 6 and cooling cavities 4 for cooling the same are jointly integrated into the stack unit packs, wherein the proton exchange membranes are shown as a dotted line frame in fig. 1, and each cell pack comprises two identical cooling units consisting of 4 graphite plate cooling cavities with high thermal conductivity. Every cooling unit comprises the graphite cake cooling chamber of two different forms, the cooling chamber includes first cooling plate and the second cooling plate that detachable can closely laminate, and first cooling (unit bipolar) board and second cooling (unit bipolar) board laminating face are equipped with the coolant oil passageway of evenly arranging, the two sides of bipolar plate are negative, positive pole runner respectively, the structure and the bipolar plate phase-match of first cooling plate and second cooling plate and bipolar plate laminating face, another side and bipolar plate phase-match or with the collector plate phase-match, the one deck of bipolar plate is negative, positive pole material runner, and the coolant oil passageway of another layer for cutting off rather than, and above-mentioned each board all is equipped with and supplies the coolant oil to pass in and out in the inlet and outlet of coolant oil passageway.
As shown in fig. 3 to 6, the cooling oil channel on the bonding surface of the first cooling plate and the second cooling plate includes a channel cavity and a plurality of straight partition boards protruding from the cooling oil channel, each straight partition board divides the channel cavity of the first cooling plate and the second cooling plate into serpentine channels, so that the cooling liquid flows in a serpentine shape when passing through the cooling cavity, and the area of the serpentine channels is not smaller than the effective area of the proton exchange membrane, so that the cooling liquid can completely cover the effective area of the MEA on the whole graphite bipolar plate.
As a preferred embodiment, the sealing structure between the first cooling plate and the second cooling plate is a male-female groove structure provided at the straight partition plate, specifically, the first cooling plate is provided with a protrusion portion, the second cooling plate is provided with a groove portion matching the protrusion portion, or the second cooling plate is provided with a protrusion portion, the first cooling plate is provided with a groove portion matching the first cooling plate, and a sealing gasket is further provided between the first cooling plate and the second cooling plate. In this embodiment, the cooling region cavities of the two graphite plates in the anode graphite plate cooling cavity and the cathode graphite plate cooling cavity are respectively provided with male and female grooves with 0.5mm of protrusion and 0.6mm of depression. The width of the female slot 9 is 1.0mm, and the slot width of the male slot 8 is 0.6 mm. The two plates are sealed by the fluororubber, so that the cooling liquid completely flows in a snake shape in the cooling cavity formed by the two plates. The effect of public female groove is promptly to strengthen sealed while guaranteeing snakelike flow, guarantees heat transfer efficiency. As an optimal implementation mode, multiple groups of fin bulges arranged in an array manner along the flow direction of cooling oil are fixedly arranged between the flow channel cavities of the first cooling plate and the second cooling plate attaching surface.
In this embodiment, the cooling oil channel of the bipolar plate is linear, and the height of any section of the flow channel cavity is the same as the specifications of the cooling oil inlet and the cooling oil outlet. The cooling liquid chamber has the function that when cooling liquid flows through the chamber, heat is led out along the transverse direction of the whole plate through the high heat conductivity of the graphite bipolar plate, and waste heat generated by the MEA is led out through the heat exchange between the graphite plate and the cooling liquid flowing through the graphite plate. In order to make the heat conduction oil in the flow channel more uniform, as an optimal implementation mode, the flow channel cavity is provided with a partition plate, and the flow channel cavity is divided into a plurality of thin flow channels with the same specification by a protruding part on the partition plate.
Through the structure, the heat transfer between each electric pile unit can be sufficiently isolated, so that the proton exchange membranes and the bipolar plates are arranged between the two cooling cavities at intervals as a preferred embodiment, the number of the proton exchange membranes is n, and the number of the bipolar plates is n-1. N is more than or equal to 2 and less than or equal to 5, and in the embodiment, the common graphite bipolar plate is a graphite bipolar plate with the thickness of 3.2mm and the two surfaces of the cathode and anode flow channels respectively.
The heat conduction mode of the self-heat dissipation design of the galvanic pile is divided into two modes. One is that the waste heat generated by the electric pile is taken away by circulating cooling liquid in a cooling liquid cavity integrally processed at the lower part of each cooling unit bipolar plate and the lower part of the common graphite bipolar plate. The other main heat conduction mode is that cooling liquid is introduced into cooling cavities at two ends of each unit, and the cooling liquid circulates to the corresponding central part of the MEA to take away most of waste heat generated by the MEA. The runners of the two heat dissipation modes are connected in parallel, and through simulation calculation, the resistance drop in the cooling liquid cavities of the two modes is close, and the cooling liquid is guaranteed to have good fluidity in the cooling liquid cavities of the two modes. The design forms a heat dissipation mode that the waste heat generated in the electric pile unit is discharged as a main heat dissipation mode by circulating cooling liquid in a cooling cavity formed by cooling units at two ends in an electric pile unit pack, and the waste heat generated by the MEA of the unit is discharged as an auxiliary heat dissipation mode by circulating cooling liquid in the cooling cavity integrally processed at the bottom of each graphite bipolar plate. The heat dissipation capacity of the galvanic pile is greatly enhanced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A high-temperature methanol fuel cell stack with spaced cooling cavities comprises a cathode end plate, an anode end plate, a cathode insulating plate, a cathode current collecting plate, a bipolar plate, a proton exchange membrane, an anode current collecting plate and an anode insulating plate, wherein the cathode insulating plate, the cathode current collecting plate, the bipolar plate, the proton exchange membrane, the anode current collecting plate and the anode insulating plate are arranged between the cathode end plate and the anode current collecting plate; the outside of the cooling cavity at two ends is respectively connected with a cathode current collecting plate and an anode current collecting plate, the inner surface of the cooling cavity is connected with a proton exchange membrane at the end part, the proton exchange membrane is connected with a bipolar plate, and the other side of the bipolar plate is provided with another proton exchange membrane; the cooling cavity comprises a first cooling plate and a second cooling plate which are detachable and can be tightly attached, wherein cooling oil channels which are uniformly distributed are arranged on the attaching surfaces of the first cooling plate and the second cooling plate, two surfaces of the bipolar plate are respectively provided with a cathode runner and an anode runner, the structures of the attaching surfaces of the first cooling plate and the second cooling plate and the adjacent plates are matched with the adjacent plates, one layer of the bipolar plate is provided with a cathode material runner and an anode material runner, the other layer of the bipolar plate is provided with a cooling oil channel which is separated from the cathode material runner and the anode material runner, and each plate is provided with an inlet and an outlet for the cooling oil to enter and exit the cooling oil channel; the cooling cavity is used for cooling an effective area of a proton exchange membrane on the bipolar plate;
the cooling oil channel of the first cooling plate and the second cooling plate comprises a flow channel cavity and a plurality of straight partition plates protruding out of the cooling oil flow channel, each straight partition plate divides the flow channel cavity of the first cooling plate and the second cooling plate into a snake-shaped flow channel, and the area of the snake-shaped flow channel is not smaller than that of the proton exchange membrane;
a plurality of groups of fin bulges which are arranged in an array manner along the flow direction of cooling oil are fixedly arranged between the flow channel cavities of the binding surfaces of the first cooling plate and the second cooling plate;
the cooling oil channel of the bipolar plate is linear, and the height of any section of the flow channel cavity is the same as the specifications of the cooling oil inlet and the cooling oil outlet.
2. A high temperature methanol fuel cell stack with spaced cooling cavities as in claim 1 wherein the straight partition walls of the first and second cooling plates are provided with male and female slot configurations, specifically wherein the first cooling plate is provided with raised portions and the second cooling plate is provided with recessed portions matching the first cooling plate or the second cooling plate is provided with raised portions, the first cooling plate is provided with recessed portions matching the first cooling plate, and a gasket is provided between the first and second cooling plates.
3. A high temperature methanol fuel cell stack having spaced cooling cavities as in claim 1 or 2, wherein a proton exchange membrane and a bipolar plate are arranged at a spacing between two cooling cavities, the number of proton exchange membranes is n, and the number of bipolar plates is n-1.
4. A high temperature methanol fuel cell stack with spaced cooling cavities as in claim 3, wherein 2 ≦ n ≦ 5.
5. A high temperature methanol fuel cell stack with spaced cooling cavities as in claim 1 wherein the flow channel cavities are provided with a partition plate, and the protrusions on the partition plate divide the flow channel cavities into multiple fine flow channels of the same size.
6. A high temperature methanol fuel cell stack with spaced cooling chambers as in claim 1 wherein the cathode and anode end plates are provided with threaded holes between which a pre-set pre-load is applied by screws to clamp components therebetween.
7. A high temperature methanol fuel cell stack with spaced cooling cavities as in claim 1 wherein the surfaces of the cathode and anode insulating plates are provided with annular protrusions at the cathode and anode material inlet and outlet holes and the coolant inlet and outlet holes, and gaskets are provided between the annular protrusions and the cathode and anode end plates.
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CN114583234A (en) * 2022-02-28 2022-06-03 上海骥翀氢能科技有限公司 Insulating end plate of fuel cell stack and assembling mode
CN114864977A (en) * 2022-05-24 2022-08-05 上海骥翀氢能科技有限公司 Fuel cell stack

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