Matsushita Electric Industrial Co., Ltd.

Shuichi Nishino

Fumio Daio

Akihiro Sano

Masatsugu Kondo

Shusuke Oguro

Nobuharu Koshiba

Kenichi Morigaki

Shigeo Kobayashi

Hiroshi Fukuda

Toshihiko Ikehata

Kenichi Takata

Tomokazu Mitamura

A general purpose organic electrolyte cell usable for long-periods or usable after long periods of storage even in a high temperature environment exceeding 150.degree. C. The positive and the negative electrodes are separated by using a separator made of porous synthetic resin sheet having a melting point of at least 170.degree. C.

Organic electrolyte batteries

A general purpose organic electrolyte cell usable for long-periods or usable after long periods of storage even in a high temperature environment exceeding 150.degree. C. The positive and the negative electrodes are separated by using a separator made of porous synthetic resin sheet having a melting point of at least 170.degree. C., and a gasket made of thermoplastic resin having a continuous usable temperature of at least 150.degree. C. on which a sealant layer made mainly of blown-asphalt is disposed.

The present invention provides a general purpose non-aqueous electrolyte cell of high performance, capable of long-term use and/or storage even in high-temperature environments by separating the positive and the negative electrodes with a separator. The separator is made of glass-fiber non-woven cloth having a defined fiber diameter, fiber weight per unit area, and average pore size. The present invention also provides a gasket made of polyphenylene sulfide resin only or substantially of polyphenylene sulfide on which a sealant layer made substantially of blown asphalt is disposed.

Non-aqueous electrolyte cell

A chargeable lithium secondary cell comprising a positive electrode composed mainly of vanadium pentaoxide, a negative electrode of a compound of lithium with niobium pentaoxide and an electrolyte of an organic solvent in which a lithium salt is dissolved, wherein resistance to overdischarge is obtained by a constitution that the molar ratio of the niobium pentaoxide to vanadium pentaoxide is from not less than 0.5 to not more than 1 and the molar ratio of the total litium contained in the positive and negative electrodes to vanadium pentaoxide is from not less than 1.1 to not more than 2.

Lithium secondary cell

The invention relates to a nonaqueous electrochemical cell comprising an alkali metal anode, an oxyhalide or other cathode-electrolyte solvent which is liquid at ambient temperature, and a porous carbonaceous cathode collector, the cathode-electrolyte containing at least polyethylene terephthalate as an additive for minimizing the voltage delay, i.e. a large voltage drop in an initial stage of discharge.

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Hirakata, Japan

Shuichi Nishino