Method and apparatus for determining when to terminate charging

Details Method and apparatus for determining when to terminate charging Method and apparatus for determining when to terminate charging

1996-08-15

2000-08-01

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 21, 320 39, 320 20, 320 4, H02J 710, H01M 1044

Patent

active

06097172&

ABSTRACT:
An apparatus and method for charging a battery are described in a technique wherein charge pulses are followed by discharge pulses and then first rest periods and other discharge pulses followed by second rest periods. Selected ones of the second rest periods are extended in time to enable a battery equilibrium to be established and the open circuit voltage of the battery to settle down and reflect an overcharging condition of the battery. By comparing the open circuit voltages measured during different extended second rest periods small voltage decreases can be reliably detected and used to determine an overcharging condition such as when gases are generated and affect the open circuit voltage. Once overcharging is detected the battery charging is stopped.

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Floyd L. William, et al., Article entitled, Rechargeable Alkaline Battery System.

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