US Patent Application 18303572. 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 18303572 titled 'SEALED BATTERY

Simplified Explanation

- The abstract describes a sealed battery design with a metal wall portion that has a gas vent hole. - The metal wall portion has an annular seal surface surrounding the opening edge of the gas vent hole. - The battery also includes a resin safety valve member that closes the gas vent hole. - The resin safety valve member has an annular joined portion that is hermetically joined to the annular seal surface. - The resin safety valve member also has an inside portion located further inside than the annular joined portion in a radial direction. - The inside portion of the resin safety valve member is designed to break when the internal pressure of the battery case reaches a specific valve opening pressure. - When the inside portion breaks, it opens the resin safety valve member, allowing gas to escape 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. The metal wall portion includes an annular seal surface surrounding an opening edge of the gas vent hole. A resin safety valve member closing the gas vent hole includes an annular joined portion hermetically joined to the annular seal surface and an inside portion located more inside than the annular joined portion in a radial direction. The inside portion breaks when the internal pressure of the battery case reaches a valve opening pressure, thereby opening the resin safety valve member.