Rapid-charging circuit

Details Rapid-charging circuit Rapid-charging circuit

1977-06-29

1979-07-24

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320DIG1, H02J 710

Patent

active

041624394

ABSTRACT:
A control circuit for rapid charging of an accumulator with a pulsating current includes a transistor arranged for switching the charge current on and off. The collector circuit of the transistor has an emitter resistor arranged to establish a control voltage that is substantially constant throughout each pulse of the charge current, and a comparator has an output connected to the base of the transistor and inputs from a reference voltage and the voltage on the accumulator so as to block the transistor when the charge voltage exceeds the reference voltage. The emitter resistor is preferably an incandescent lamp, a zener diode is preferably arranged in parallel with the lamp to provide a constant voltage for the base-emitter circuit of the transistor, and a complementary transistor is preferably connected with the switching transistor to form a two-stage transistor circuit.

REFERENCES:
patent: 3421066 (1969-01-01), Flynn et al.
patent: 3535608 (1970-10-01), Cramer et al.
patent: 3576487 (1971-04-01), Chase
patent: 3919618 (1975-11-01), Coleman et al.
patent: 4039920 (1977-08-01), Popp

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