Method for charging secondary battery and charger used therefor

Details Method for charging secondary battery and charger used therefor Method for charging secondary battery and charger used therefor

1994-05-03

1996-11-19

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

Patent

active

055766080

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
patent: 4609861 (1986-09-01), Inaniwa et al.
patent: 4661760 (1987-04-01), Goto et al.
patent: 4680528 (1987-07-01), Mikami et al.
patent: 4843299 (1989-06-01), Hutchings
patent: 5172044 (1992-12-01), Sasaki et al.
patent: 5175485 (1992-12-01), Joo

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