Charging apparatus

Details Charging apparatus Charging apparatus

1993-03-29

1995-11-14

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 31, 320 24, 455 89, H02J 710, H02J 702

Patent

active

054670071

ABSTRACT:
A charging apparatus capable of charging a secondary battery so that a utilization time thereof is not shortened is disclosed. When a microcomputer 63 judges that a voltage of the secondary battery has not reached a fully charged voltage, the microcomputer sets a predetermined value to a timer circuit 65 and then turns on a drive portion 57 to flow current through a resistor 59 so that the secondary battery is charged by a normal charging current. At the same time, the timer circuit 65 is started. When the timer circuit 65 reaches the set value, the microcomputer 63 turns off the drive portion 57 and turns on a drive portion 60 to thereby flow current through a resistor 62 so that the secondary battery is charged by a trickle charging current.

REFERENCES:
patent: 4740754 (1988-04-01), Finger
patent: 4885523 (1989-12-01), Koenck
patent: 4942352 (1990-07-01), Sano
patent: 5266880 (1993-11-01), Newland

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