Method for charging a secondary battery and charger used therefo

Details Method for charging a secondary battery and charger used therefo Method for charging a secondary battery and charger used therefo

1996-07-09

1997-06-10

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 31, H01M 1044, H02J 700

Patent

active

056379811

ABSTRACT:
A secondary battery charging method and a charger used therefor, in which the method uses a constant current and a constant voltage such that the secondary battery is first charged with the constant current until the terminal voltage of the battery becomes a reference voltage higher than the full charging voltage for the battery and then further charged with the constant voltage which is equal to the full charging voltage. These two charging operations are switched by using various kinds of detection and control circuits, so that the secondary battery is properly charged in a short time. Further, the charger of the present invention is provided with a circuit for charging a plurality of battery cells simultaneously or separately.

REFERENCES:
patent: 3854082 (1974-12-01), Nasby et al.
patent: 4607208 (1986-08-01), Vreeland et al.
patent: 4609861 (1986-09-01), Inaniwa et al.
patent: 5172044 (1992-12-01), Sasaki et al.
patent: 5175485 (1992-12-01), Joo

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