Simple automatic charging or cutoff circuit device for intermitt

Details Simple automatic charging or cutoff circuit device for intermitt Simple automatic charging or cutoff circuit device for intermitt

1985-06-12

1987-10-06

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320DIG2, H02J 710

Patent

active

046985808

ABSTRACT:
A battery charging circuit which automatically cuts off whenever a battery becomes fully charged. The circuit includes a source of pulsating d.c. charging current and an SCR connected in series with a battery to be recharged. A resistor and capacitor are connected in series in the order named between the anode electrode and the cathode electrode of the SCR which has its gate electrode connected, via a diode, to the circuit point between the cathode and the resistor. A further resistor is connected across the capacitor. When the battery becomes substantially charged, the voltage which appears across the first-mentioned resistor is insufficient to fire the SCR and charging current is no longer delivered to the battery.

REFERENCES:
patent: 3176212 (1965-03-01), De Puy
patent: 3991356 (1976-11-01), Spiteri
patent: 4410835 (1983-10-01), Zabroski
GE SCR Manual (4th edition) 1967, pp. 69, 185, 186.

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