US Patent Application 18303568. SEALED BATTERY simplified abstract

SEALED BATTERY

Organization Name

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor(s)

Yozo Uchida of Toyota-shi (JP)

Tsuyoshi Ehara of Toyota-shi (JP)

Yuki Sato of Toyota-shi (JP)

Syoichi Tsuchiya of Toyota-shi (JP)

Masataka Asai of Toyota-shi (JP)

Tsuyoshi Asano of Toyota-shi (JP)

Masahiro Uchimura of Toyota-shi (JP)

Shigeru Matsumoto of Toyohashi-shi (JP)

Yasuaki Nagano of Kosai-shi (JP)

SEALED BATTERY - A simplified explanation of the abstract

This abstract first appeared for US patent application 18303568 titled 'SEALED BATTERY

Simplified Explanation

The abstract describes a sealed battery design with a metal case and a resin safety valve member.

• The battery case has a metal wall with a gas vent hole and an annular seal surface surrounding the opening edge of the hole.
• The resin safety valve member covers and closes the gas vent hole.
• The resin safety valve member is hermetically joined to the annular seal surface.
• When the internal pressure of the battery case reaches a certain level, the annular joined portion of the resin safety valve breaks.
• This opening of the resin safety valve member allows the release of pressure from the battery case.

Original Abstract Submitted

In a sealed battery, a battery case includes a metal wall portion formed with a gas vent hole. Of an outer surface of the metal wall portion, a hole-surrounding annular surface surrounding an opening edge of the gas vent hole includes an annular seal surface surrounding the opening edge of the gas vent hole. A resin safety valve member covering and closing the the gas vent hole includes an annular joined portion hermetically joined to the annular seal surface. The annular joined portion of the resin safety valve breaks when the internal pressure of the battery case reaches a valve opening pressure, thereby opening the resin safety valve member.