Pressure vent for a sealed primary cell

Details Pressure vent for a sealed primary cell Pressure vent for a sealed primary cell

1978-08-28

1980-03-04

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Blowout type

429122, 220203, H01M 212

Patent

active

041918061

ABSTRACT:
A disc formed of a resilient plastic exhibiting a low creep characteristic and having a pressure vent is used to close the mouth of a tubular cell envelope of a primary cell. An elongated terminal is inserted through the disc and into the cell interior. The pressure vent is in the disc at a location between the terminal and the edge of the disc. The vent comprises a recess having a frangible diaphragm with at least one groove. At a predetermined pressure the diaphragm breaks at the groove, releasing pressure.

REFERENCES:
patent: 2203902 (1940-06-01), Georgiev
patent: 3218197 (1965-11-01), Carmichael et al.
patent: 3401314 (1968-09-01), Steele, Jr.
patent: 4075398 (1978-02-01), Levy

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