Battery charger for mobile apparatus

Details Battery charger for mobile apparatus Battery charger for mobile apparatus

1991-10-10

1992-12-15

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 38, 320 15, H02J 700

Patent

active

051720450

ABSTRACT:
A battery charger includes a switching circuit (8) for supplying the current to the timer (3) from the secondary battery (6). The battery charger also includes a detecting circuit (7) for activating the switching circuit (8) by charging the voltage into the capacitor (11). Further, the battery charger includes diodes (16) and (14) for supplying the current to the timer (3) from the outside battery (22) and from the secondary battery (6) respectively, and for preventing backward current flow to the respective power sources. The battery charger of the present invention prevents overcharging and extends the lifetime of the secondary battery in the mobile apparatus.

REFERENCES:
patent: 4286204 (1981-08-01), Belot
patent: 4983904 (1991-01-01), Iwahashi
patent: 5089762 (1992-02-01), Sloan

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