Safety vent device for electrochemical cells

Details Safety vent device for electrochemical cells Safety vent device for electrochemical cells

1986-06-02

1987-10-06

Niebling, John F.

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Blowout type

429 53, 220207, 220 89A, H01M 212

Patent

active

046982825

ABSTRACT:
The present invention relates to a venting device for a sealed container, and more particularly to a safety venting device for a Lithium cell. The venting device is located on one of the two ends of a sealed container. The vent is comprised of a circular member which is recessed in the container end whereby it is concave with respect to the exterior of the container. Extending between the circular member and the container end are scored lines of weakness. As pressure increases in the container, the circular member deflects so as to develop stresses which become concentrated on the scored lines causing them to rupture at a predetermined pressure.

REFERENCES:
patent: 3850339 (1974-11-01), Kinkel
patent: 3851782 (1974-12-01), Clawson et al.
patent: 3918610 (1975-11-01), Willis
patent: 3921556 (1975-11-01), Wood et al.
patent: 4484691 (1984-11-01), Lees
patent: 4576303 (1986-03-01), Mundt et al.
patent: 4588101 (1986-05-01), Ruegg
patent: 4601959 (1986-07-01), Romero
patent: 4610370 (1986-09-01), Patterson et al.

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