Charging apparatus

Details Charging apparatus Charging apparatus

1997-03-21

1999-07-13

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With detection of current or voltage amplitude

320159, H02J 700

Patent

active

059231505

ABSTRACT:
A charging apparatus for controlling so as to charge a connected secondary battery by a constant current which is equal to or less than a constant voltage and to charge the secondary battery by a constant voltage which is equal to or less than the constant current when a terminal voltage of the secondary battery rises to the constant voltage is constructed by: switching means for shutting off a charge current at a certain period; comparing means for comparing a voltage difference between a first voltage on a power source side than the switching means when the charge current is shut off and a second voltage on the secondary battery side with a first reference voltage; and control means for stopping the charge or displaying the end of charge in accordance with the comparison result.

REFERENCES:
patent: 5408170 (1995-04-01), Umetsu et al.
patent: 5576608 (1996-11-01), Nagai et al.

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