Battery charger

Details Battery charger Battery charger

1992-01-13

1993-12-28

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 37, 320 48, H02J 704

Patent

active

052743217

ABSTRACT:
A battery charger is disclosed comprising a pair of charging terminals to which a secondary battery may be connected, a power source for supplying the charging terminals with a charging voltage, a recharging detector for detecting the degree of recharging on the secondary battery on the strength of the voltage between the charging terminals, and a timer operative to measure a predetermined time beginning when the recharging detector detects that the degree of recharging on the second battery has reached a predetermined degree set within a range from seventy percent to ninety percent of full recharging. The invention further includes a first recharging indicator, for example an LED, which indicates that the secondary battery is being charged up until the timing operation commences. Once the timing operation begins, a second recharging indicator, for example a differently colored LED, indicates that the secondary battery has been charged to the predetermined degree and is receiving a final charge during the timing operation.

REFERENCES:
patent: 4131841 (1978-12-01), Bennefeld
patent: 4191918 (1980-03-01), Nicholls
patent: 4647834 (1987-03-01), Castleman
patent: 4820965 (1989-04-01), Siemer
patent: 4992720 (1991-02-01), Hata

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