Battery charging circuit

Details Battery charging circuit Battery charging circuit

1975-11-07

1977-03-22

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 40, 320 48, 323 8, 323 68, 320DIG1, H02J 704

Patent

active

040139344

ABSTRACT:
A battery charging circuit limits the charging current to one or more series connected cells such that the cells do not receive a damaging overcharge if not removed from the circuit after the rated charging time. A first transistor shunts the battery when the voltage thereof reaches a certain level. Temperature compensation means corresponding with the change in battery voltage with temperature is provided by the base-emitter path of a second transistor connected between biasing means and the shunt transistor.

REFERENCES:
patent: 3160805 (1964-12-01), Lawson, Jr.
patent: 3192405 (1965-06-01), Patchell
patent: 3241029 (1966-03-01), Slomski
patent: 3278823 (1966-10-01), Ross
patent: 3585482 (1971-06-01), Zelina
patent: 3825740 (1974-07-01), Friedman et al.
patent: 3919616 (1975-11-01), Allison

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