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
  • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
• • 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
  • H01M8/0202—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
  • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
  • H01M8/2465—Details of groupings of fuel cells
  • H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
• • 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
  • H01M2008/1095—Fuel cells with polymeric electrolytes
• • 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
  • H01M8/0223—Composites
  • H01M8/0228—Composites in the form of layered or coated products
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M8/00—Fuel cells; Manufacture thereof
  • H01M8/02—Details
  • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
  • H01M8/0276—Sealing means characterised by their form
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/30—Hydrogen technology
  • Y02E60/50—Fuel cells

Definitions

• the fuel cell of the present invention includes a separator in which a refrigerant flow path is formed, a laminated member laminated on a refrigerant flow path forming surface side of the separator, and the refrigerant flow path interposed between the separator and the laminated member. And a seal part that seals the refrigerant flowing through the separator, wherein a refrigerant regulating part that regulates a refrigerant flow to the seal part side is provided on the inner side in the separator surface direction than the seal part.
• the fuel cell separator of the present invention is a fuel cell separator provided with a refrigerant flow path and a seal portion that seals the refrigerant flowing through the refrigerant flow path, and is located on the inner side in the separator surface direction than the seal portion.
• a refrigerant restricting portion for restricting a refrigerant flow to the seal portion side may be provided.
• the fuel cell is configured by stacking the separator configured as described above as one layered member of the fuel cell together with other layered members, an area where there is no need for cooling, such as the vicinity of the seal portion, that is, outside the power generation area Part of the refrigerant is restricted from flowing into the tank.
• the separator for a fuel cell according to the present invention is a separator for a fuel cell in which a refrigerant flow path and a manifold for supplying the refrigerant to the refrigerant flow path are formed, and is at least one of the refrigerant regulating portions for regulating the refrigerant flow. A portion may be provided along the opening edge of the manifold.
• FIG. 2 is a schematic plan view showing the entire separator.
• Fig. 3 is a cross-sectional view along line AA in Fig. 1.
• FIG. 4 is an exploded perspective view showing a single cell structure of a fuel cell according to an embodiment of the present invention.
• FIG. 5 is a perspective view showing a part of a separator of a conventional fuel cell.
• FIG. 6 is a partial cross-sectional view showing a state in which the separators are stacked.
• the single cell 2 shown in FIG. 4 is composed of ME A 11 and a pair of separators 14 a and 14 b sandwiching the ME A 11, and has a laminated form as a whole.
• the MEA 1 1 and the separators 14 a and 14 b are sealed by the first seal members 1 0 1 a and 1 0 1 b at the periphery between them. .
• a plurality of oxidizing gas flow paths 3 1 a are formed on the inner surface of the separator 14 a that is on the electrode 2 2 a side, and the outer surface on the opposite side (refrigerant flow path shape)
• a plurality of cooling water main flow paths 32 are formed on the surface.
• a plurality of hydrogen gas flow paths 31 b are formed on the inner surface of the separator 14 b on the electrode 22 b side, and the opposite outer surface (refrigerant flow path forming surface) is A plurality of cooling water main flow paths 32 are formed.
• the second seal member 1 0 1 c is similar to the first seal members 1 0 1 a and 1 0 1 b, and the first sub seal portions 1 1 2 c and 1 1 3 c for hydrogen gas and oxidizing gas
• the first sub seal portion 1 1 6 c and 1 1 7 c for use are separated from the first main seal portion 1 1 1 c.
• FIG. 1 is an enlarged view of the manifold 14 3 of the separator 14 a (1 4 b) shown in FIG. 4 and its peripheral portion.
• a plurality of convex ribs 1 3 a are provided between the main hold 4 3 and the cooling water main flow path 3 2 (not shown), and cooling water from the main hold 43 is passed between these ribs 1 3 a. This is the cooling water introduction channel 3 2 a introduced into the cooling water main channel 3 2.
• a plurality of convex ribs are provided between the cooling water main flow path 3 2 and the hold 5 3, and the cooling water is cooled from the cooling water main flow path 3 2 to the hold 5 3. This is the cooling water outlet flow path 3 2 b for extracting water.
• the cooling water supplied to the refrigerant flow path forming surface side of the separator 14 a (1 4 b) through the manifold 4 3 is guided to the cooling water main flow path 3 2 through the cooling water introduction flow path 3 2 a. Then, while cooling the power generation region facing the cooling water main flow path 32, it is discharged to the manifold 53 through the cooling water introduction flow path 3 2 b.
• These cooling water inlet channel 3 2 a and cooling water outlet channel 3 2 b are the same as the main cooling water channel 3 2 described above. It constitutes a part of the refrigerant flow path in Ming.
• the separators 14 a and 14 b further include a manifold 43, a cooling water introduction passage 32 a, a cooling water main passage 32, a cooling water outlet passage 32 b, and a manifold 53 so as to comprehensively surround the outer periphery.
• Ribs (refrigerant regulating portions, convex portions) 15 are provided.
• the outer peripheral rib 15 is composed of a ridge-shaped projection formed in the shape of a bank formed in the separators 14a and 14b, and has a rectangular cross-sectional shape, for example.
• the outer peripheral rib 15 is located on the inner side in the separator surface direction than the first main seal portion 1 1 1 c of the second seal member 1 0 1 c that seals the refrigerant flowing between the separators 14 a and 14 b.
• the outer peripheral ribs 15 a and 15 b are connected to the inner walls 15 A and 15 B and the inner walls 43 A and 53 A of the manifolds 43 and 53, respectively. 14 b in the thickness direction), or so as to be substantially flush.
• the first main seal part 1 1 1 c of the seal member 1 0 1 c is interposed, so that the holdup 4 3, the cooling water introduction flow path 3 2 a, the cooling water main flow path 3 2, and the cooling The cooling water flowing in this order through the water outlet channel 3 2 b and discharged from the manifold 5 3 is liquid-tightly sealed.
• the outer peripheral rib 15 of the present embodiment is formed integrally with the separators 14 a, 14 b, and the second seal member 10 0 against the compressive load (clamping load) in the cell stacking direction. Since it has a sizing structure that does not easily deform like all other sealing members including 1c, it also functions as a spacer for laminating each separator 14a, 14b at a predetermined interval To do.
• the flow of the cooling water that leaves the manifold 43 and spreads in the separator surface direction is guided to the power generation region side by the outer peripheral rib 15, thereby 4
• the second seal as shown by arrow B in FIG. 7 is restricted from flowing into the area between 3 and the second seal member 1001c, that is, the non-heat generation area outside the power generation area.
• Generation of cooling water flow along the member 1 0 1 c can be suppressed. Therefore, it becomes possible to improve the cooling efficiency of the fuel cell by the cooling water.
• outer peripheral rib 15 (outer peripheral rib 15 b) is connected to the manifold main section 53 and the first main seal section 1 1 1 c disposed in the vicinity of the second hold section 2 0 2 c.
• the cooling led out from the cooling water main flow path 3 2 to the hold 5 3 between the opening edge of the ma hold 5 3 and the inner wall 1 5 B of the outer peripheral rib 15 b Since there is no space (redundant gap) that allows water to enter the vicinity of the second manifold 2 0 2 c side, the cooling water exiting the cooling water outlet flow path 3 2 b While being guided by 15 (especially the outer peripheral rib 15 b), it is discharged to the manifold 53 without making a detour.
• the seal portion interposed between the separator and the laminated member laminated on the refrigerant flow path forming surface side of the separator and sealing the refrigerant flowing through the refrigerant flow path is the second seal member 1 according to the embodiment. It is not limited to gaskets such as 0 1 c, but may be an adhesive. Industrial applicability
• the refrigerant regulating portion is provided on the inner side in the separator surface direction than the seal portion, it is not necessary to perform cooling, the circulation of the refrigerant to the region is regulated, and the cooling efficiency of the fuel cell Can be improved.

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• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Fuel Cell (AREA)

Priority Applications (4)

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Publications (1)

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Cited By (2)

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Citations (6)

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• 2005
  • 2005-03-23 JP JP2005084435A patent/JP5051606B2/ja not_active Expired - Fee Related
• 2006
  • 2006-03-23 CN CN2006800081093A patent/CN101138117B/zh not_active Expired - Fee Related
  • 2006-03-23 DE DE112006000674.6T patent/DE112006000674B4/de not_active Expired - Fee Related
  • 2006-03-23 WO PCT/JP2006/306590 patent/WO2006101260A1/ja not_active Ceased
  • 2006-03-23 CA CA2602153A patent/CA2602153C/en active Active
  • 2006-03-23 US US11/886,292 patent/US9099693B2/en not_active Expired - Fee Related

Patent Citations (6)

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