Voltage level detector for battery charger control circuit

Details Voltage level detector for battery charger control circuit Voltage level detector for battery charger control circuit

1980-06-25

1982-07-27

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 38, 320 40, H02J 710

Patent

active

043419887

ABSTRACT:
A voltage level detector for controlling a battery charger, includes a power supply circuit adapted to be coupled to a battery during charging thereof, a first voltage regulator for providing a supply voltage for the detector, the first voltage regulator being coupled to receive power from the power supply circuit, a second voltage regulator for providing a stable source of reference voltage, the second voltage regulator being coupled to receive power from the detector supply voltage, a voltage comparator having one input thereof coupled to the stable reference voltage source, circuitry for coupling the battery to the other input of the voltage comparator, the circuit for coupling being adapted to coupled a proportion of the battery voltage which proportion equals the stable reference voltage when the battery voltage reaches a predetermined maximum level, and control circuitry responsive to the output of the voltage comparator for controlling the charging of the battery in response to the battery voltage reaching the maximum desired level.

REFERENCES:
patent: 4105962 (1978-08-01), Scott et al.
patent: 4198593 (1980-04-01), Ballman

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