Dual battery charge control - directs current into battery giving lowest voltage using turn-on control for SCRs

摘要

Two series-connected batteries are connected across the power and ground terminals of an alternator and a silicon controlled rectifier selectively connects the 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 the battery reaches a predetermined value. A turn-off control circuit for the silicon controlled rectifier 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.