Sealed battery

Details Sealed battery Sealed battery

1996-12-04

1998-01-27

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Elastic, resilient or spring biasing valve means

429 82, 22020311, H01M 212

Patent

active

057120560

ABSTRACT:
The present invention provides a sealed battery having a large capacity by using a thin safety valve device so as to increase a volume of a cell element. The sealed battery has a high safety owing to the thin safety valve device having an elastic valve element comprising an ethylene-propylene elastomer and thermoplastic resin particles dispersed in the ethylene-propylene elastomer. The elastic valve element is produced by mixing thermoplastic resin particles with an ethylene-propylene elastomer material, molding the mixture into a predetermined shape and, at the same time, crosslinking the ethylene-propylene elastomer material.

REFERENCES:
patent: 4237593 (1980-12-01), Wolf
patent: 4298662 (1981-11-01), Sugalski et al.
patent: 4662533 (1987-05-01), Takahashi et al.
patent: 4780378 (1988-10-01), McCartney et al.
patent: 5372897 (1994-12-01), Kozawa et al.

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