Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1995-05-12
1996-07-30
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
429 33, 429 34, 429 39, H01M 200
Patent
active
055410162
ABSTRACT:
The placement in an electrical appliance of one or more tiny electrically activated thermally responsive semiconductor microactuators (a "valve-on-a-chip") disposed over the fluid entrance inlet(s) to regulate fluid flow to a gas depolarized electrochemical battery creates an efficient gas depolarized electrochemical power supply and appliance which permits the entrance of oxygen from air to the battery only when the battery is supplying electrical power to a load. Power for the valve is preferably derived from the battery itself but could be provided by a separate source within or without the battery. This tiny valve acts as a safety pressure vent and can act as a safety fuse as well. When electrical power is not required from the battery, the valve excludes entry of harmful impurities and unneeded fluid reactants thereby increasing the life of the battery during storage or when the electrical appliance the battery is powering is idle. A resistance means in parallel to the actuator valve is useful to enhance the operation of the power supply. If the battery leaks, the corrosive fluid causes the valve and/or battery to cease to operate. The potential combination with a recharging apparatus is also useful. The appliance may be designed to regulate the flow of reactant.
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Kalafut Stephen
Nuzzolillo M.
Schumm, III Brooke
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