Dual battery charge control

H - Electricity – 02 – J

Patent

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320/11

H02J 7/14 (2006.01)

Patent

CA 1043870

DUAL BATTERY CHARGE CONTROL ABSTRACT OF THE DISCLOSURE Two series-connected batteries are connected across the power and ground terminals of an alternator and a silicon 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 alterna- tor only through the battery providing the lower voltage output. A turn-off control circuit for the silicon con- trolled 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 recti- fier when the voltage drop a-cross 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.

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