Sanyo Electric Co., Ltd.

Other

Kazuo Teraji

Satoshi Narukawa

Takanori Fujii

Tsutomu Sonozaki

Masataka Takeuchi

Takashi Ohkubo

Shuichi Naijo

Ikuro Nakane

Yasunobu Kodama

Noriyuki Yoshinaga

Tsukasa Itou

Kouji Negoro

Shiori Maeda

Ikurou Nakane

Sunao Harada

Kazunari Mori

Sealed non-aqueous electrolyte cell having a casing of a sheet of laminated material

A thin type battery having a electricity generating element disposed in a sealed chamber formed by a laminated sheathing. The laminated sheathing forms the sealed chamber by overlapping and airtightly adhering opposing surfaces of the laminated films at a primary sealing area and at a secondary sealing area which is perpendicular to the direction of the primary sealing area. Collector terminals are connected to a positive electrode and to a negative electrode of the electricity generating element. The collector terminal are airtightly crimped in the secondary sealing area of the laminated sheathing. Also, the collector terminals extend outwardly of the laminated sheathing. The primary sealing part of the laminated sheathing is located over a surface of the electricity generating element.

Thin type battery with laminated sheathing

A secondary battery has a positive electrode principally comprising a lithium-containing complex oxide, a negative electrode principally comprising a carbon material and an organic electrolyte solution, said negative electrode utilizing a mixed binder comprising a polyamic acid and at least one polymer selected from the group consisting of a polyamide resin, polyvinylpyrrolidone and a hydroxyalkylcellulose. The battery has a long cycle life and, at the same time, hardly breaks or bursts even when the battery temperature becomes abnormally high, thereby being highly reliable.

Secondary battery utilizing a mixed binder

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Yawata, Japan

Kazuo Teraji