# US 7,740,969 B2 · Separator for fuel battery

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- Number: US 7,740,969 B2
- Document ID: US7740969B2
- Status: Granted
- Kind: B2
- Application number: 10/557,824
- Filed: 2004-07-08
- Published: 2006-11-30
- Granted: 2010-06-22
- Earliest claimed: 2003-07-08
- Assignees: Nok Corporation
- Inventors: Tomohiro Inoue; Shigeru Watanabe; Tetsuya Urakawa
- Web page: https://patentgrep.com/patent/US7740969B2

## CPC

- H01M 8/0273: with sealing or supporting means in the form of a frame
- F16J 15/0818: {Flat gaskets}
- F16J 15/122: {generally parallel to the surfaces}
- H01M 8/026: characterised by grooves, e.g. their pitch or depth
- H01M 8/0276: Sealing means characterised by their form (H01M8/0273 takes precedence)
- H01M 8/0284: Organic resins; Organic polymers
- H01M 8/2483: characterised by internal manifolds
- F16J 2015/0856: {with a non-metallic coating or strip}
- Y02E 60/50: Fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

To provide a separator for a fuel battery in which a gasket is integrally formed with rubber in gasket forming grooves provided in a separator main body without the gasket forming grooves being damaged at a time of forming with the rubber and sealing performance being lowered due to the damage of the separator, the separator for the fuel battery is structured such that a groove width of the gasket forming groove formed in one surface of the separator main body is made larger than a groove width of the gasket forming groove formed in the other surface, or groove side surfaces in the gasket forming groove are formed in an inclined shape, or a curvature is provided in corner portions of a groove bottom surface.

## Claims

### Claim 1

A separator for a fuel battery comprising:
a separator main body of a mixture of a carbon powder and a thermosetting resin,
a gasket made of a rubber material selected from an EPDM and a fluorine compound rubber and provided with lip portions on upper and lower surfaces;
said separator main body being provided with two opposed surfaces with each of said two opposed surfaces including gasket forming grooves, the gasket forming grooves of said two opposed surfaces being different in shape; and
said gasket forming grooves being provided with a through hole;
said gasket being integrally formed in both surfaces of said separator main body by attaching said rubber material to said gasket forming grooves;
at least one of groove side surfaces in said gasket forming grooves formed in said separator main body being inclined downwardly to central parts of said grooves to form an inclined shape.

### Claim 2

A separator for a fuel battery comprising:
a separator main body of a mixture of a carbon powder and a thermosetting resin,
a gasket made of a rubber material selected from an EPDM and a fluorine compound rubber and provided with lip portions on upper and lower surfaces;
said separator main body being provided with two opposed surfaces with each of said two opposed surfaces including gasket forming grooves, the gasket forming grooves of said two opposed surfaces being different in shape; and
said gasket forming grooves being provided with a through hole;
said gasket being integrally formed in both surfaces of said separator main body by attaching said rubber material to said gasket forming grooves; and
a curvature being provided in corner portions of at least one of groove bottom surfaces in said gasket forming grooves formed in said separator main body.