Medium or large scale sealed metal oxide/metal hydride battery

Details Medium or large scale sealed metal oxide/metal hydride battery Medium or large scale sealed metal oxide/metal hydride battery

1994-10-28

1995-10-03

Willis, Jr., Prince

Chemistry: electrical current producing apparatus, product, and

Sealed cell having gas prevention or elimation means

Prevention or elimination means is one of the cell...

429101, 429218, 429224, 429247, 429249, 420900, H01M 402

Patent

active

054551250

ABSTRACT:
A sealed storage battery for use in potable power supply is improved by using metal oxide-hydrogen storage alloy to have a higher capacity and a smaller weight. The battery has a structure which comprises a combination of a positive electrode having a high energy density in a wide range of temperature and consisting of a bulk high porosity body filled with an active material composed of solid solutions such as typical Co solid solution, oxide powders such as typically Ca(OH).sub.2 and ZnO, with an addition of graphite for rendering the electrode reaction effective; and a high capacity negative electrode of hydrogen storage alloy having a reduced equilibrium hydrogen pressure, and where the aforementioned characteristics at high temperatures are further enhanced by an electrolyte suitable to high temperatures, short-circuits are prevented by a chemically stable separator, and a structure sealing a container and a safety vent is excellent in air-tightness and reliability.

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Database WPIL Week 9136, Derwent Publications Ltd., London GB; AN 91-263297 & JP-A-3 173 062 (Matsushita Electric Industrial K.K.) 26 Jul. 1991 *abstract*.

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