Method for restoring the lost capacity of nickel batteries and b

Details Method for restoring the lost capacity of nickel batteries and b Method for restoring the lost capacity of nickel batteries and b

1985-02-25

1987-07-14

Hearn, Brian E.

Chemistry: electrical current producing apparatus, product, and

Regenerating, salvage or repair feature other than only...

429 50, 429 52, 320 14, 320 21, 320 35, H01M 1044, H02J 706

Patent

active

046802410

ABSTRACT:
A method for partially or fully restoring the lost capacities of nickel batteries, as well as the batteries produced by this method, is disclosed.
In accordance with the inventive method, a nickel battery is cycled at least 10 times, with each cycle including a discharging step during which the capacity achieved at the end of the previous cycle is reduced by at least 5 percent, and a charging step. The charging rate employed during the charging step is greater than about C/10 per hour. Moreover, while the ratio of the amount of charge delivered to the battery during the charging step of each cycle to the amount of charge withdrawn from the battery during the previous cycle is greater than one, this ratio is chosen so that the temperature of the electrolyte of the battery does not exceed about 30 degrees Centigrade.

REFERENCES:
patent: 3917990 (1975-11-01), Sherman
patent: 3959706 (1976-05-01), Mabuchi et al.
patent: 4237411 (1980-12-01), Kothe et al.

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