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The fuel cell

A fuel cell and membrane electrode assembly technology, which is applied to fuel cells, fuel cell parts, circuits, etc., can solve the problems of fuel cell power generation performance deterioration and insufficient supply of reaction gas, and achieves the goal of suppressing power generation performance deterioration. Effect

Active Publication Date: 2022-07-12
TOYOTA JIDOSHA KK
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  • Summary
  • 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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  • The fuel cell
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Examples

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Embodiment Construction

[0020] figure 1 It is an exploded perspective view of the unit cell 2 of the fuel cell 1 . The fuel cell 1 is constructed by stacking a plurality of unit cells 2 . figure 1 Only one unit cell 2 is illustrated, and the other unit cells are omitted. Single battery 2 in figure 1 Stacked with other single cells in the Z direction indicated in . The unit cell 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 indicated in .

[0021] The fuel cell 1 is a polymer electrolyte fuel cell that generates electric power using a fuel gas (eg, hydrogen gas) and an oxidant gas (eg, 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 a separator) sandwiching the MEGA 10. The MEGA 10 has ...

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PUM

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Abstract

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

Description

technical field [0001] The present invention relates to a fuel cell. Background technique [0002] The separator of the fuel cell is formed with flow path grooves through which the reaction gas flows between the separator and the membrane electrode assembly. A portion of the reaction gas flowing in the flow path groove is supplied to the membrane electrode assembly, so that the power generation reaction occurs in the membrane electrode assembly. For example, in Japanese Unexamined Patent Application Publication No. 2014-026960, the separator is formed with wavy grooves and linear grooves as flow path grooves. [0003] Because the wavy grooves and the linear grooves differ in shape, there is a large spacing between the linear grooves and the wavy grooves closest to the linear grooves. If such an 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 be deteriorate...

Claims

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Application Information

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Patent Type & Authority Patents(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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