FUEL CELL STACK AND POWER GENERATION MODULE

Title:

FUEL CELL STACK AND POWER GENERATION MODULE

Document Type and Number:

Japanese Patent JP2016207270

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To suppress gas leakage which occurs when contact pressure in a surface direction varies due to the difference in deformation of bolts caused by temperature difference of gas flowing through gas passages in a fuel cell stack.SOLUTION: A fuel cell stack fastened with a plurality of bolts comprises: a plurality of power generation units, each including an electrolyte layer, an air electrode and a fuel electrode, which are aligned in a first direction; and the plurality of bolts extending in the first direction. The plurality of bolts includes: a first bolt forming a gas passage through which gas is introduced from the outside of the fuel cell stack; and a second bolt forming a gas passage through which the gas is discharged to the outside of the fuel cell stack. A linear thermal expansion coefficient αof the first bolt and a linear thermal expansion coefficient αof the second bolt satisfy a relation of α<α.SELECTED DRAWING: Figure 11

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Inventors:

OKAWA TAKASHI

Application Number:

JP2015083155A

Publication Date:

December 08, 2016

Filing Date:

April 15, 2015

Export Citation:

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Assignee:

NGK SPARK PLUG CO

International Classes:

H01M8/247; H01M8/04; H01M8/0606; H01M8/12

Attorney, Agent or Firm:

Patent Business Corporation Alpha International Patent Office

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