State-of-charge indicator for voltage-regulated battery charger

Details State-of-charge indicator for voltage-regulated battery charger State-of-charge indicator for voltage-regulated battery charger

1974-12-16

1976-07-20

Miller, J. D.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320DIG2, 320 40, 320 59, H02J 704

Patent

active

039709132

ABSTRACT:
A signaling circuit is connected across the output terminals of a voltage-regulated battery charger that also has a.c. input terminals, an SCR connected between one input terminal and an output terminal, and a regulating circuit connected with the gate of the SCR and comprising a zener diode. The signaling circuit comprises a small lamp bulb connected in series with another zener diode, the latter having a zener voltage such as to pass current through the bulb only when voltage at the output terminals is at or above the value corresponding to a fully charged battery.

REFERENCES:
patent: 3205422 (1965-09-01), Gold
patent: 3305774 (1967-02-01), Heath
patent: 3321754 (1967-05-01), Grimm et al.
patent: 3534354 (1970-10-01), Galginaitis
patent: 3599073 (1971-08-01), Wilson et al.

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