Supply voltage monitoring device for automotive battery

Details Supply voltage monitoring device for automotive battery Supply voltage monitoring device for automotive battery

1978-04-24

1980-08-12

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

340636, G08B 2100, H02J 700

Patent

active

042175364

ABSTRACT:
A supply voltage monitoring device for an automotive battery comprising an average voltage generation circuit for generating the average voltage of the supply voltage of a battery as a power source for various equipment on board an automobile, a Zener diode conducting when the output voltage of the average voltage generation circuit exceeds the prescribed value, a first transistor connected between the Zener diode and the average voltage generation circuit, a second transistor controlled by the conducting Zener diode, a capacitor controlled for charging and discharging by the output of the second transistor, third transistors controlled by the output voltage of the capacitor, and a light emitting diode controlled for the light emitting state or the non-emitting state by the second transistor or the third transistors, and characterized in that the device is constructed to monitor the supply voltage of the battery by the light emitting state or the non-emitting state of the light emitting diode.

REFERENCES:
patent: 3568175 (1971-03-01), Schwehr et al.
patent: 3939421 (1976-02-01), Barringer et al.
patent: 4019112 (1977-04-01), Satoh

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