Real time charging control of a fast battery charger

Details Real time charging control of a fast battery charger Real time charging control of a fast battery charger

1996-12-09

1998-06-23

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With peak detection of current or voltage

320161, H02J 702, H02J 716

Patent

active

057709386

ABSTRACT:
Methods and circuits are disclosed which terminate charging of a battery when the maximum charge is reached. Maximum charge is reached when the battery voltage has peaked, after a long rise, and just starts to drop. This small voltage drop, or delta, is detected by a charger control which compares the real time battery voltage with a previously sampled battery voltage. Upon detecting this small voltage drop, the charger control terminates the charging process. Implementations using an analog delta voltage detection and a digital delta voltage detection are described.

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