Toshiba Battery Co., Ltd.

Toshiba Kikai Kabushiki Kaisha

Gen Takayama

Shigeo Kasahara

Toshihiko Kusago

Yoshiyuki Sakai

Yasuhiro Kuroki

Tsutomu Horikoshi

Takeo Ito

Hiroshi Kaneko

Kazuta Takeno

Katsuhiko Iguchi

Nobuo Kawamura

Kiyoshi Sueoka

Hidemi Houjyou

Toshiya Terui

Shingo Satoh

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.

Manufacturing method of batteries

A coating die is disclosed, in which a slit-like spacing 29 is formed between a pair of die elements 25, 27 arranged in opposed relation to each other. A band-shaped electrode sheet 23 is movable along the length of the spacing 29. The sides of the slit-like spacing along the width of the electrode sheet 23 are enclosed. An electrode piling agent is supplied from an external source into the die element pair 25, 27 through supply flow paths 47, 49. Discharge ports 47a, 49a of the supply flow paths 47, 49 are open to the slit-like spacing 29. The portion of the spacing 29 downstream of the discharge ports 47a, 49a in the direction of movement of the electrode sheet 23 has a thickness equivalent to the thickness of the electrode sheet 23 plus the thickness of the electrode piling agent coated on the two sides of the electrode sheet 23. The portion of the spacing 29 upstream of the discharge ports 47a, 49a has a thickness substantially equal to the thickness of the electrode sheet 23. The job of coating the electrode piling agent on the two sides of the electrode sheet can thus be performed with high accuracy.

Apparatus and method for applying a coating to a base material

Air-blowing nozzles 21 for blowing a hot air are provided in both sides of an electrode sheet 33 for a battery both surfaces of which an electrode compounding agent has been applied to. In each of the air-blowing nozzles 21, a pair of slit-shaped blowholes 65 being extended in the width direction of the electrode sheet 33 are provided on both of the upper and lower sides of the end face part 63. The hot air blown off from a pair of the upper and lower blowholes 65 dries the electrode compounding agent as well as pressurizes a space between the electrode sheet 33 and the end face part 63 to form a pressure room P, and the left and right pressure rooms P hold the electrode sheet 33 to suppress its sway.

Drying apparatus with swivel support structure for sheet direction

Drying apparatus and drying method

This invention provides an electrolyte injection apparatus capable of injecting an electrolyte accurately into a battery which does not contain an electrolyte yet and in which an electrode group consisting of a laminated structure formed by interposing a separator between positive and negative electrodes is accommodated in a case such that a lamination plane of the electrode group is parallel to the direction of depth of the case. The electrolyte injection apparatus of this invention includes a rotary table, an electrolyte injection member supported by the rotary table so as to be tilted by a centrifugal force upon rotation of the rotary table, and the injection member further having an internal hole whose bottom section is tapered, and a small-diameter exit hole formed in a lower end thereof and communicating with the internal hole, a holding mechanism for holding the battery containing no electrolyte below the injection member such that the exit hole of the injection member is inserted into an opening portion of the case with a desired distance held between a lower opening portion of the exit hole and an upper end of the electrode group, and an electrolyte supply mechanism for supplying an electrolyte to the injection member.

Electrolyte injection apparatus

Growing community of inventors

Kanagawa-ken, Japan

Gen Takayama