Battery charger

Details Battery charger Battery charger

1997-09-12

1999-01-19

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Pulsed

320114, H02J 704

Patent

active

058617337

ABSTRACT:
In a battery charger in which an output voltage and an output current from the battery charger are compared with a reference voltage, respectively, and an error voltage is fed back, so that, in an initial charging period, constant-current charging is performed and, after a battery voltage reaches a constant value, constant-voltage charging is performed, an adder 11 for adding a voltage Vg which is proportional to a charging current of a battery 9, to the reference voltage Vr which is to be compared with the output voltage of the battery charger 20 is disposed, and the output voltage V of the battery charger 20 is controlled while feeding back an error voltage obtained as a result of a comparison of the added value output from the adder 11 with the output voltage V of the battery charger 20.

REFERENCES:
patent: 5182510 (1993-01-01), Nakamura
patent: 5237259 (1993-08-01), Sanpei
patent: 5408170 (1995-04-01), Umetsu et al.
patent: 5541490 (1996-07-01), Sengupta et al.
patent: 5557192 (1996-09-01), Tamai

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