Matsushita Electric Industrial Co., Ltd.

Hideyuki Kobayashi

Hideaki Yoshio

Kenjin Masumoto

Seiichi Mizutani

Shinji Tsurutani

A closure assembly for sealed batteries in which explosion-proof features are incorporated. A metal plate having a hole, an insulating resin sheet, a metal thin sheet, an insulating sheet having an air hole, a metal guide plate having a hole, and a metal cap are laid upon one another within an insulating gasket. Metal plate and metal guide plate are in contact with each other and electrically connected. Upon a build-up of pressure within the battery, the insulating resin sheet expands and ruptures, whereby a narrow part provided in the metal thin sheet positioned above the insulating resin sheet breaks, thus cutting supply of electric current.

Closure assembly for sealed batteries

A closure assembly for sealed batteries in which explosion-proof features are incorporated. A metal plate (,) having a hole (,), an insulating resin sheet (,), a metal thin sheet (,), an insulating sheet (,) having an air hole (,), a metal guide plate (,) having a hole (,), and a metal cap (,) are laid upon one another within an insulating gasket (,). Metal plate (,) and metal guide plate (,) are in contact with each other and electrically connected. Upon a build-up of pressure within the battery, the insulating-resin sheet (,) expands and ruptures, whereby a narrow part (,) provided in the metal thin sheet (,) positioned above the insulating resin sheet (,) breaks, thus cutting supply of electric current.

Growing community of inventors

Kadoma, Japan

Hideyuki Kobayashi