Condition responsive battery charging circuit

Details Condition responsive battery charging circuit Condition responsive battery charging circuit

1978-07-27

1980-06-24

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 32, 320 35, 320 37, H02J 710

Patent

active

042097363

ABSTRACT:
A battery charging circuit includes a ferroresonant transformer having a rectified output for providing a constant output voltage to be supplied to a battery to be charged. Battery temperature is sensed providing an input to a control circuit which operates a shunt regulator associated with the ferroresonant transformer to provide battery charge voltage as a function of battery temperature. In response to a high battery temperature the controller functions to lower the output voltage to the battery, and in response to a low battery temperature, operates to provide a higher output voltage, with suitable control for any battery temperature between minus 10.degree. and plus 150.degree. Fahrenheit. As the battery approaches full charge and battery acceptance current falls below a predetermined level, a charge cycle termination control allows charging to continue for a period preset by the operator, at the end of which period, line voltage is removed from the charger thereby terminating the charge cycle.

REFERENCES:
patent: 3090904 (1963-05-01), Jensen
patent: 3205425 (1965-09-01), Moyer
patent: 3585482 (1971-06-01), Zelina
patent: 3599071 (1971-08-01), Lapuyade et al.
patent: 3848173 (1974-11-01), Hase
patent: 4052656 (1977-10-01), Lavell et al.
patent: 4065712 (1977-12-01), Godard et al.
patent: 4125802 (1978-11-01), Godard

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