Safety valve means for battery

Details Safety valve means for battery Safety valve means for battery

H - Electricity

01

M

319/48

H01M 2/08 (2006.01) H01M 2/12 (2006.01)

Patent

CA 1150767

-1- Abstract: The present application discloses a safety valve means for a battery comprising a lid plate having therein a valve hole, a thin plate overlapped on the lid plate for closing the valve hole, a terminal plate in a reverse dish shape overlapped on the thin plate and having a gas removing hole and a downwardly projected cutter means and forming a valve chamber together with the thin plate, a holding means for holding the periphery of the thin plate between the lid plate and the terminal plate by caulking the turning edge of the lid plate or the terminal plate and an annular resilient member disposed between the thin plate and the terminal plate and pressed by the terminal plate to press the thin plate. According to the safety valve means for a battery of the present invention, when the periphery of the thin plate is held by and between the lid plate and the terminal plate, the holding pressure is adapted to be absorbed by the annular resilient member, thereby to restrain bending of the thin plate which otherwise results from the holding pressure above-mentioned. Therefore, the thin plate may be located at a predetermined position, whereby highly reliable safety valve having high precision may be obtained.

353335

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