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Fuel cell

A technology of fuel cells and membrane electrode assemblies, which is applied in the direction of fuel cells, fuel cell parts, circuits, etc., can solve the problems of fuel cell power generation performance degradation, insufficient supply of reaction gas, etc., and achieve the purpose of suppressing power generation performance degradation Effect

Active Publication Date: 2019-10-11
TOYOTA JIDOSHA KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this interval is too large, the reactant gas may not be sufficiently supplied to the membrane electrode assembly, and the power generation performance of the fuel cell may deteriorate

Method used

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Embodiment Construction

[0020] figure 1 It is an exploded perspective view of a unit cell 2 of the fuel cell 1 . The fuel cell 1 is configured by stacking a plurality of single cells 2 . figure 1 Only one unit cell 2 is illustrated, and the other unit cells are omitted. Single battery 2 in figure 1 Stack with other single cells in the Z direction shown in . The unit battery 2 has a substantially rectangular shape. The longitudinal direction and the short direction of the unit cell 2 correspond to the figure 1 The Y-direction and X-direction shown in .

[0021] The fuel cell 1 is a polymer electrolyte fuel cell that generates electricity using a fuel gas (for example, hydrogen gas) and an oxidant gas (for example, oxygen gas) as reaction gases. The unit cell 2 includes: a membrane electrode gas diffusion layer assembly (MEGA) 10 ; a support frame 18 supporting the MEGA 10 ; a cathode separator 20 and an anode separator 40 (hereinafter referred to as separators) sandwiching the MEGA 10 . The MEG...

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Abstract

The invention relates to a fuel cell. The fuel cell includes: a membrane electrode assembly; and a separator disposed on one side of the membrane electrode assembly, wherein the separator includes flow path grooves through which reactant gas flows between the separator and the membrane electrode assembly, the flow path grooves include: wavy grooves wavily extending in a first direction and arranged in a second direction orthogonal to the first direction; and a linear groove linearly extending in the first direction, the wavy grooves include: a first wavy groove located closest to the linear groove among the wavy grooves; and a second wavy groove located opposite to the linear groove with respect to the first wavy groove, and amplitude of the first wavy groove is smaller than that of the second wavy groove.

Description

technical field [0001] The invention relates to a fuel cell. Background technique [0002] The separator of the fuel cell is formed with flow path grooves through which the reactant gas flows between the separator and the MEA. A part of the reaction gas flowing in the flow path groove is supplied to the membrane electrode assembly, so that a power generation reaction occurs in the membrane electrode assembly. For example, in Japanese Unexamined Patent Application Publication No. 2014-026960, a separator is formed with wavy grooves and linear grooves as flow path grooves. [0003] Since the wavy groove and the linear groove are different in shape, there is a large interval between the linear groove and the wavy groove closest to the linear groove. If this interval is too large, the reaction gas may not be sufficiently supplied to the membrane electrode assembly, and the power generation performance of the fuel cell may deteriorate. Contents of the invention [0004] An o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1006H01M8/0258H01M8/026H01M8/0265H01M8/0267H01M8/2483
CPCH01M8/1006H01M8/026H01M8/0258H01M8/0265H01M8/0267H01M8/2483H01M2008/1095H01M8/0263Y02E60/50H01M8/04029H01M8/2457H01M8/241H01M8/1004H01M8/04089
Inventor 冈部裕树加藤学
Owner TOYOTA JIDOSHA KK
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