Toshiba Battery Co., Ltd.

Nobuo Kawamura

Gen Takayama

Toshiya Terui

This manufacturing method of batteries that comprises the steps of accommodating a battery element in an envelope film body of which one end side is opened to form an opening for injecting an electrolytic solution; and sealing the opening after the electrolytic solution is injected from the opening of the envelope film body ; wherein an opening side of the envelope film body is made larger than a prescribed shape and dimension to use as a temporary reservoir region of an injected electrolytic solution , after injection of a prescribed amount of the electrolytic solution the region of the prescribed shape and dimension being sealed and cut to form a battery. According to the method, a manufacturing method of batteries that can not only make smaller and lighter the batteries but also mass-produce batteries of high quality can be provided.

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Kawasaki, Japan

Nobuo Kawamura