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US 4,055,709 AGranted
Rejuvenation of nickel-cadmium battery cells
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorRobert C. Medford
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Abstract
Nickel-Cadmium cells of insufficient voltage capacities are rejuvenated by process which includes the steps of charging the cells, flushing the cells with demineralized water, replacing the electrolyte, and then deep discharging. The cells are left in the discharged state for shipping purposes and then charged prior to use.
Claims6
A method of rejuvenating nickel-cadmium battery cells of limited voltage capacity comprising the steps of:
- charging the cells at approximately 2.5 amps until equilibrium is reached;
- draining the electrolyte from the cells;
- flushing the cells internally with demineralized-distilled water, which is free of carbon dioxide, in an ultrasonic bath;
- preparing fresh electrolyte by dissolving approximately 33% by weight of reagent grade potassium hydroxide in boiled-distilled water;
- and
- adding said fresh electrolyte to said cells.
3 more elements
Dependencies are inferred from the claim text.