Electrochemical cell with internal circuit interrupter

Details Electrochemical cell with internal circuit interrupter Electrochemical cell with internal circuit interrupter

1988-07-11

1989-08-08

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Elastic, resilient or spring biasing valve means

429 62, 429 7, H01M 1050

Patent

active

048551953

ABSTRACT:
Electrochemical cells employ a current collector-safety switch member comprised of a shape memory alloy in the electric circuit in the cell. The collector-safety switch member has a base portion and a plurality of legs extended therefrom and when the internal temperature of the cell rises, the legs of the collector-safety switch member are retracted to thereby disconnect the electrical circuit in the cell. These cells can also be comprised of a resettable thermal switch for inhibiting the flow of current in the cell at a temperature below the disconnect temperature of the current collector-safety switch member.

REFERENCES:
patent: 4035552 (1977-07-01), Epstein
patent: 4507368 (1985-03-01), Hashimoto
patent: 4514620 (1985-04-01), Cheng et al.
patent: 4529675 (1985-07-01), Sugalski
patent: 4545926 (1985-10-01), Fouts, Jr. et al.
Chemical Week, Feb. 12, 1988, p. 26.
Raychem Corporation, PolySwitch.RTM. Products Brochures.
Machine Design, Oct. 25, 1979, pp. 113-117.
30th Power Sources Symposium, Jun. 1982, pp. 130-133.

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