Battery recharging system with state of charge detection that in

Details Battery recharging system with state of charge detection that in Battery recharging system with state of charge detection that in

1994-02-28

1997-06-24

Tso, Edward

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 31, 320 39, H01M 1044

Patent

active

056420315

ABSTRACT:
A state of charge test is first performed on the battery by applying a current pulse and then observing the voltage decay characteristics which result. Batteries which are initially nearly fully charged exhibit a larger voltage decay than batteries which are not as fully charged. The result of this initial state of charge test is used to determine how to best terminate battery charging. In this way battery overcharging is prevented regardless of the initial state of charge of the battery.

REFERENCES:
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patent: 4392101 (1983-07-01), Saar et al.
patent: 5331268 (1994-07-01), Patino et al.
patent: 5365160 (1994-11-01), Leppo et al.
patent: 5432426 (1995-07-01), Yoshida
patent: 5442274 (1995-08-01), Tamai
patent: 5449996 (1995-09-01), Matsumoto et al.
patent: 5449997 (1995-09-01), Gilmore et al.

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