Chemistry: electrical current producing apparatus – product – and – Sealed cell having gas prevention or elimation means – Prevention or elimination means is one of the cell...
Patent
1996-04-19
1998-06-16
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Sealed cell having gas prevention or elimation means
Prevention or elimination means is one of the cell...
429 57, 429 61, 429 62, 22020301, 22020308, 2202031, H01M 1050, H01M 2012
Patent
active
057667900
ABSTRACT:
A safety device for use in a secondary battery having a battery case formed with a hole open to outside of the battery case, and a generating unit airtightly housed in the battery case. The safety device includes a disk spring mounted on the battery case to close the hole and having one side thereof convexed toward the inside of the battery case. A switch is provided on the backside of the disk spring. It is adapted to change over under a stress applied from the disk spring when the disk spring bends backward so that the other side thereof is convexed toward the outside of the battery case. The switch is provided in a current flow path of the secondary battery.
REFERENCES:
patent: 3617386 (1971-11-01), Bosben et al.
patent: 4035552 (1977-07-01), Epstein
patent: 4345611 (1982-08-01), Ikeda et al.
patent: 4431716 (1984-02-01), Eppley et al.
patent: 4783383 (1988-11-01), Machida et al.
patent: 5567539 (1996-10-01), Takahashi et al.
Hayashi Toshiharu
Imoto Akira
Izawa Tadayuki
Kameishi Toshizo
Kihara Koji
Skapars Anthony
Wako Electronics Co., Ltd.
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