Apparatus and method for charging a plurality of batteries using

Details Apparatus and method for charging a plurality of batteries using Apparatus and method for charging a plurality of batteries using

1996-10-02

1998-03-17

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

Switchable to parallel connection

320162, H02J 7021, H01M 1044

Patent

active

057291179

ABSTRACT:
Battery charging time is shortened. The control circuit 6 controls the switches 7-1 and 7-2 to charge the batteries 21-1 and 21-2 at a constant current one by one. Subsequently the batteries are charged one by one at a constant voltage until the charging current decreases to 1/2 a prescribed current. Next, the control circuit 6 turns the switches 7-1 and 7-2 on to charge simultaneously the batteries 21-1 and 21-2 in a parallel connection. After the charging current decreases to a prescribed current value, the batteries are charged at a constant voltage for a prescribed time. Then charging is completed.

REFERENCES:
patent: 4139812 (1979-02-01), Huggins
patent: 4297629 (1981-10-01), Gardard et al.
patent: 4849682 (1989-07-01), Bauer et al.
patent: 5057762 (1991-10-01), Goedken et al.
patent: 5229705 (1993-07-01), Kato
patent: 5357187 (1994-10-01), Park
patent: 5497066 (1996-03-01), Drouillard et al.
patent: 5637981 (1997-06-01), Nagai et al.

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