Hitachi Maxell, Limited

Hirokazu Yoshikawa

Kenichi Yokoyama

Kiyoshi Sato

Shigeru Ikenari

Yoshio Uetani

Osamu Watanabe

Kenichi Sawada

Kenya Kazehara

Tugiyasu Iwamaru

Hisashi Urushiwara

A flat disc type sealed battery comprises a battery vessel having a bottom wall with an electrolyte charging opening formed in the central portion thereof, and a battery lid member for covering the upper opening of the battery vessel. Power generating components are enclosed by sealing the battery vessel battery lid member, and a first sealing member is provided for sealing the electrolyte charging opening after the electrolyte is charged into the battery vessel, and a second sealing member is provided for covering the aperture in the side of the lower edge portion of the electrolyte charging opening. The outer peripheral portion of the second sealing member is welded to the bottom wall of the battery vessel to perfectly seal the battery vessel.

Flat type sealed battery with hermetic sealing structure

In a non-aqueous electrochemical battery, there are formed a plurality of grooves with thinned bottom portion on the bottom of the battery container. The grooves are intersected at least at one point and the bottom of the grooves are made flat so that the explosion-proof arrangement is operable for a desired inner pressure of the battery.

Non aqueous electrochemical battery with explosion proof arrangement and

Growing community of inventors

Ibaraki, Japan

Hirokazu Yoshikawa