Hitachi Maxell, Limited

Naoto Sugimune

Yoshiki Somatomo

Yoshihisa Fujihara

Hayato Higuchi

Shota Aoki

Tohsiya Takaishi

Toshiya Takaishi

A sealed prismatic battery is provided. The battery includes a battery casinghaving a prismatic cylindrical shape of body with a bottom part and an upper opening, and a lidwhich fits in the upper opening of the battery casing. The opening of the casing bodyand the lidhave laterally long shape in which the back-and-forth width dimension is smaller than the lateral length. The outer periphery of the lidbeing welded to the periphery of the upper opening of the battery casingto form a welded portion. The welded portion includes a pair of fragile partshaving low weld strength and formed at the ends of two long sidesandof the welded portion which are parallel to each other, respectively, The battery is appropriately prevented from exploding and strength of battery is sufficiently provided against an impact caused by fall or the like.

Sealed prismatic battery

A battery provided with one end of each lead element connected to the positive and negative electrode respectively is drawn out from the can bodythrough a spaceformed at a surface part of said jointed flange sectionand the area of the flange section around the drawing space is sealed by a resin bonding. The battery provided with a new structure which can solve the problems which may be generated in all fields, such as battery shape, attachment property, battery strength, productivity and so on in order to make a thin type battery.

Battery used for small electric devices

Battery

Growing community of inventors

Osaka, Japan

Naoto Sugimune