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Separator and fuel cell

A fuel cell and isolator technology, used in fuel cells, fuel cell groups, fuel cell components, etc., can solve problems such as low rigidity, and achieve the effect of reducing weight and easy processing

Inactive Publication Date: 2010-11-17
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the separator described in JP-A-2004-6104, the transfer channel passes through the intermediate plate in the thickness direction, and therefore, bears a load applied perpendicular to the surface of the separator (that is, applied in the stacking direction of the stacked structure). The rigidity of the load) is relatively low at the part of the intermediate plate that forms the gas transmission channel

Method used

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  • Separator and fuel cell
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Embodiment Construction

[0027] figure 1 is a perspective view showing the general structure of the fuel cell stack 100 in one embodiment of the present invention. The fuel cell stack 100 has a stack structure in which a plurality of unit cells for generating electricity through an electrochemical reaction between hydrogen and oxygen are stacked with separators interposed therebetween. Each unit cell has an anode, a cathode, and an electrolyte membrane having proton conductivity interposed therebetween, as described below. In this embodiment, a polymer electrolyte membrane is used as the electrolyte membrane. Other electrolytes such as solid oxides may be used instead of polymer electrolyte membranes. Furthermore, in this embodiment, the separator has a three-layer structure as described below, and is formed to have passages for hydrogen as a fuel gas to be supplied to the anode, passages for hydrogen as an oxidant gas to be supplied to the cathode passages for air, and passages for coolant. Depen...

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Abstract

A separator (41) for use in a fuel cell stack has an anode facing plate (44), a cathode facing plate (42), and an intermediate plate (45). The intermediate plate (45) has an air supply through-hole (452a), an air discharge through-hole (452b), a hydrogen supply through-hole (454a), and a hydrogen discharge through-hole (454b). The intermediate plate (45) also has through-holes (452cl, 452dl, 452el, and 452fl). The air supply through-hole (452a) is in communication with the through-hole (452cl), the air discharge through-hole (452b) with the through-hole (452dl), the hydrogen supply through-hole (454a) with the through-hole (452el), and the hydrogen discharge through-hole (454b) with the through-hole (452fl), respectively via communication passages (452c2, 452d2, 452e2, and 452f2) formed in the intermediate plate (45).

Description

field of invention [0001] The present invention relates to a separator and a fuel cell with the separator. Background technique [0002] A fuel cell that generates electricity through an electrochemical reaction between hydrogen and oxygen is attracting attention as an energy source. A fuel cell has a stack structure in which membrane-electrode assemblies and separators each having an anode (hydrogen electrode) and a cathode (oxygen electrode) on both sides of an electrolyte membrane having proton conductivity are alternately stacked (a fuel cell having such a stack structure Hereinafter also referred to as "fuel cell stack"). [0003] JP-A 2004-6104 describes a separator having a fuel gas plate facing the anode (hereinafter referred to as “anode facing plate”), an oxidant gas plate facing the cathode (hereinafter referred to as “ cathode facing plate") and an intermediate plate placed between these plates. In this separator, each gas plate has a through hole and a gas fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/24H01M8/02H01M50/77
CPCH01M8/0258Y02E60/50H01M8/0223H01M8/0221H01M8/0228H01M2008/1095H01M8/0206H01M8/242H01M8/026H01M8/0267H01M8/2483H01M8/0273
Inventor 冈部裕树
Owner TOYOTA JIDOSHA KK