Solid oxide fuel cell stack

a fuel cell and stack technology, applied in the field of solid oxide fuel cell stacks, can solve problems such as damage to the reliability of electrical connections, and achieve the effects of good electrical contact, and reducing the risk of electrical deterioration

Inactive Publication Date: 2017-10-12
MORIMURA SOFC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a fuel cell stack that can still follow the deformation of a single fuel cell during high-temperature operation while maintaining good electrical contact between the end member and interconnector. This is achieved by using an electrically conductive member between the end member and interconnector. This helps to prevent deterioration in electricity generation performance due to an increase in electric resistance.

Problems solved by technology

The interconnector and the end plate may fail to follow the deformation of the single fuel cell, potentially resulting in damage to reliability of electrical connection.

Method used

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Embodiment Construction

[0029]A preferred embodiment of the present invention will next be described with reference to the drawings. However, the embodiment to be described below is a mere example of application of the present invention to a solid oxide fuel cell stack. The contents of the embodiment should not be construed as limiting the invention.

[0030]FIG. 1 is a perspective view of a solid oxide fuel cell stack (hereinafter, called a “fuel cell stack”) 1 according to the present embodiment. The fuel cell stack 1 of the present embodiment includes a plurality of (e.g., 20) electricity generation units 2. The electricity generation unit 2 includes a pair of interconnectors 5, a single fuel cell (hereinafter, may be called merely “single cell”) C, a cathode-side current collector 10, a cathode-side insulation frame 11, a separator 12, an anode-side frame 13, an insulation frame 14, and an anode-side current collector 15 (see FIG. 2). The electricity generation unit 2 will be described in detail later. No...

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Abstract

A fuel cell stack having a structure in which a plurality of single fuel cells C(1) and a plurality of interconnectors (5) are disposed alternately between a pair of end members and such that a junction member J composed of an elastic member (20) and an electrically conductive member (21) is disposed in a space (3a) formed between a first end member (3) and a first interconnector (5(1)). A portion of the electrically conductive member (21) is disposed between the first end member (3) and the elastic member (20), and another portion of the electrically conductive member (21) is disposed between the first interconnector (5(1)) and the elastic member (20); and the first end member (3) and the first interconnector (5(1)) are electrically connected through the electrically conductive member (21).

Description

TECHNICAL FIELD[0001]The present invention relates to a solid oxide fuel cell stack having a structure in which single fuel cells and interconnectors are disposed alternately and held between a pair of end members from a direction in which the single fuel cells face one another.BACKGROUND ART[0002]Conventionally known is a solid oxide fuel cell (SOFC) which uses a single fuel cell having an anode layer, a cathode layer, and a solid electrolyte layer. A solid oxide fuel cell stack (hereinafter, called “fuel cell stack”) is configured such that the single fuel cells and the interconnectors are disposed alternately and fixedly held between a pair of end plates (end members) from a direction in which the single fuel cells face one another. Generally, the end plate is a metal member having the form of a flat plate, and the flat surface of the end plate is joined to the interconnector. Since the interconnector is electrically connected to the single fuel cell through a current collector, ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): H01M8/248H01M8/126H01M8/1253H01M4/90
CPCH01M8/248H01M4/9033H01M2008/1293H01M8/126H01M8/1253H01M4/9066H01M8/12H01M8/24H01M8/02H01M8/2432Y02E60/50Y02P70/50H01M8/0297H01M8/2425
InventorMORIKAWA, TETSUYAHOTTA, NOBUYUKI
OwnerMORIMURA SOFC TECH CO LTD