Electric storage batteries

Details Electric storage batteries Electric storage batteries

1979-05-23

1980-06-10

Lefevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Elastic, resilient or spring biasing valve means

429157, 429178, 429225, H01M 212

Patent

active

042073847

ABSTRACT:
There is disclosed a sealed lead acid button cell having a moulded acid resistant polymer case formed in two portions each portion having a central boss with a passage leading into the cell, and a metal plug located in the said passage, the inner end of the plug being electrically connected to the electrode located in that portion of the case, and a cap made of a metal harder than the metal of the said plug surrounding the central boss and squeezing it against the plug and the cap being electrically connected to the plug. The cap may thus be crimped around the boss or may be a force fit thereon. The case is provided with a pressure relief vent to allow gases to vent under service conditions.

REFERENCES:
patent: 3177096 (1965-04-01), Jache
patent: 3230112 (1966-01-01), Watanabe et al.
patent: 3775182 (1973-11-01), Patton et al.
patent: 4053687 (1977-10-01), Coibion

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