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Polymer electrolyte fuel cell

A fuel cell and electrolyte technology, applied in the direction of solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problems of damaged component availability, fuel cell productivity difficulties, etc., and achieve the effect of avoiding the reduction of power generation performance

Inactive Publication Date: 2009-09-23
TOYOTA SHATAI KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such compromised component availability makes it difficult to improve fuel cell productivity

Method used

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  • Polymer electrolyte fuel cell
  • Polymer electrolyte fuel cell
  • Polymer electrolyte fuel cell

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Embodiment Construction

[0028] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. figure 1is a partial schematic cross-sectional view of a polymer electrolyte fuel cell stack according to an embodiment of the present invention. The fuel cell stack has cells T. Each battery T includes a pair of fuel cell separator plates 10 (hereinafter, specifically referred to as separator plates 10 ) and an electrode structure 20 between the separator plates 10 . The fuel cell stack is designed such that a large number of cells T are stacked together with the cooling water passage 30 sandwiched between the cells T.

[0029] In the fuel cell stack thus designed, a fuel gas such as hydrogen and an oxidant gas such as air are introduced into the cells T from the outside, whereby electric current is generated by electrode reactions in the cell structures 20 . Hereinafter, fuel gas and oxidant gas are collectively referred to as gas.

[0030] The separa...

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Abstract

Each of collectors 22 of an electrode structure 20, which partially constitutes a polymer electrolyte fuel cell, is formed from a metal lath MR having a large number of through-holes. A stopping portion 22a in which the through-holes are reduced in diameter is formed at a peripheral end portion of the collector 22. The peripheral end portion of the collector 22 is folded; subsequently, the folded peripheral end portion is pressed, thereby forming the stopping portion 22a. A resin seal portion 23 for sealing introduced fuel gas and oxidizer gas is formed integrally with the stopping portions 22a by insert molding which is performed such that an injected molten resin encloses the stopping portions 22a. The resin seal portion 23 formed integrally with the stopping portions 22a can reliably prevent inflow of the molten resin toward central portions of the collectors 22.

Description

technical field [0001] The present invention relates to fuel cells, especially polymer electrolyte fuel cells. Background technique [0002] Generally well-known polymer electrolyte fuel cells are described in, for example, Japanese Patent Laid-Open Nos. 2002-184422 and 2005-317322. Conventional polymer electrolyte fuel cells utilize cell structures. In the battery structure, a membrane electrode assembly (MEA) and a metal plate with protrusions (or a collector with channels) are placed between two carbon plates (or between two separator plates); the membrane electrode assembly ( MEA) consists of an electrolyte membrane (electrolyte), anode and cathode; a seal (frame) is placed around a metal plate (or collector). In the battery structure, a space is enclosed by the surface of the membrane electrode assembly (MEA), the inner wall of the seal (frame) and the surface of each carbon plate (separator). Metal plates (collectors) are located in the corresponding spaces formed, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10
CPCH01M2008/1095H01M8/0284Y02E60/50H01M8/0232H01M8/02H01M8/10
Inventor 川尻浩右田中秀人高村智之篠崎善記饭塚和孝和田三喜男加藤千智金井伸夫
Owner TOYOTA SHATAI KK