Battery having venting wrapper comprising gas previous plastic l

Details Battery having venting wrapper comprising gas previous plastic l Battery having venting wrapper comprising gas previous plastic l

1976-10-26

1977-12-20

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Having specified venting, feeding or circulation structure

Venting structure

296231, H01M 212

Patent

active

040643239

ABSTRACT:
A battery is at least partially enclosed by a wrapper comprising a composite of a gas pervious plastic layer and a gas impervious layer. The gas impervious layer has a fracture wide enough to permit the transmission of gases, and the width of the fracture can be maintained at a predetermined and desired size. The combination of the gas pervious plastic layer and the fracture in the gas impervious layer provides a system for regulating the species of gases that enter and/or exit from the battery, as well as the rate at which such gas transmissions occur. The gas impervious layer may be a thin metal foil, preferably of aluminum.

REFERENCES:
patent: 2478798 (1949-08-01), Williams
patent: 2693499 (1954-11-01), Neumann
patent: 2729693 (1956-01-01), Waber
patent: 3870566 (1975-03-01), Bergum et al.

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