Chemical cell

Details Chemical cell Chemical cell

1995-06-05

1996-06-04

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

429 61, 429 62, H07M 212

Patent

active

055231780

ABSTRACT:
This invention provides a chemical cell equipped with a safety mechanism which can restrict an abnormal reaction of a cell and can prevent in advance gas explosion, etc., of the cell. The chemical cell 4010 comprises a cell reaction portion 4015, a positive pole terminal 4016 and a cell case 4041 functioning also as a negative pole terminal. A driving member 4021 responsive to a gas pressure or reaction heat at the time of the abnormal reaction includes a retention mechanism 4025 having a flexible member 4251 which cuts off a current and maintains this state. It also includes a gas discharge member. The driving member 4021 preferably short-circuits the positive pole terminal 4016 and the cell case 41 after the current is cut off, and preferably includes a valve member 4301 for closing a gas passage 4047 again after the gas is discharged (see FIG. 40 ).

REFERENCES:
patent: 4209571 (1980-06-01), Bessett et al.
patent: 4252869 (1981-02-01), Heitz et al.
patent: 4788112 (1988-11-01), Kung
patent: 4855195 (1989-08-01), Georgopoulos et al.
patent: 4943497 (1990-07-01), Oishi et al.
patent: 4992339 (1991-02-01), Georgopoulos
patent: 4992344 (1991-02-01), Coppers
patent: 5362576 (1994-11-01), Clark et al.
patent: 5407760 (1995-04-01), Kasner et al.

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