Dual battery charge control

Details Dual battery charge control Dual battery charge control

1975-09-19

1977-08-09

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 17, 320 61, 322 28, H02J 714

Patent

active

040413632

ABSTRACT:
Two series-connected batteries are connected across the power and ground terminals of an alternator and a silicon controlled rectifier selectively connects said power terminal to the junction between the batteries. A turn-on control circuit for the silicon controlled rectifier is connected across the battery providing the higher voltage output to effect conduction of the silicon controlled rectifier when the voltage drop across said battery reaches a predetermined value, whereby to direct charging current from the alternator only through the battery providing the lower voltage output. A turn-off control circuit for the silicon controlled rectifier also may be provided to connect the series batteries to the power input of a voltage regulator to effect deactivation of the alternator and silicon controlled rectifier when the voltage drop across the higher voltage output battery decreases a predetermined amount with respect to the voltage drop across the lower voltage output battery, the turn-off control circuit also functioning to activate the voltage regulator, alternator and silicon control rectifier when the voltage across the lower voltage output battery starts to drop, thereby re-establishing charging through both batteries.

REFERENCES:
patent: 3624480 (1971-11-01), Campbell et al.
patent: 3809995 (1974-05-01), Hardin

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