On-board vehicular electrical power supply system

Details On-board vehicular electrical power supply system On-board vehicular electrical power supply system

1978-10-04

1981-01-27

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

322 99, H02J 714

Patent

active

042478138

ABSTRACT:
To permit elimination of separate exciter diodes of a vehicular three-phase alternator, and yet reliably ensure protection of the vehicular battery and provide an indication of discharge of the battery and hence possible failure of any excitation for the alternator, while additionally providing an indication of possible damage to the battery due to overvoltage conditions, the field of the alternator is separately excited from the battery through a voltage regulator connected to the main switch, and a low-voltage and high-voltage indicator is connected in parallel to the battery, preferably an LED triggered to illumination upon response of one of two threshold sensing circuits which sense undervoltage and overvoltage conditions of the battery beyond a predetermined voltage range.

REFERENCES:
patent: 4056765 (1977-11-01), Scheidler et al.
patent: 4121146 (1978-10-01), Hill
patent: 4163186 (1979-07-01), Haley
"Voltage Monitor Uses Led Indicators," Moss, Electronic Design 19, 9-13-74, p. 176.
"Announcing the Battery Status Indicator-A New Led/IC Combination," Litronix Advertisement, "Electronics" Mag., 7/25/74.

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