Dual battery charge control
First Claim
1. A charge control device for external connection between first and second series connected batteries and the single output terminal of a voltage regulated, DC output, generating means, comprising:
- blocking diode means normally connecting the output terminal of the generator to that pole of the first of the batteries remote from the junction between the two so as to charge the pair of batteries in series;
latchable electrically actuable switch means, operable when actuated to establish a low resistance direct current path between the output terminal of the generating means and the junction between the first and second batteries;
electrical switch actuator means arranged for connection across the first of the batteries and responsive to a predetermined voltage drop across the first battery to actuate said switch means;
said switch means latching on after actuation to maintain said low resistance direct current path between the generating means output terminal and the junction between the batteries so as to charge only the second battery of the pair during the flow of direct current in said path and irrespective of further voltage variations in the first battery.
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Accused Products
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.
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Citations
12 Claims
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1. A charge control device for external connection between first and second series connected batteries and the single output terminal of a voltage regulated, DC output, generating means, comprising:
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blocking diode means normally connecting the output terminal of the generator to that pole of the first of the batteries remote from the junction between the two so as to charge the pair of batteries in series; latchable electrically actuable switch means, operable when actuated to establish a low resistance direct current path between the output terminal of the generating means and the junction between the first and second batteries; electrical switch actuator means arranged for connection across the first of the batteries and responsive to a predetermined voltage drop across the first battery to actuate said switch means; said switch means latching on after actuation to maintain said low resistance direct current path between the generating means output terminal and the junction between the batteries so as to charge only the second battery of the pair during the flow of direct current in said path and irrespective of further voltage variations in the first battery. - View Dependent Claims (2)
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3. A charge control for a pair of batteries connected in series across electrical generating means, comprising:
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a. electrically actuated switch means arranged for removably connecting the output of the generating means to the junction between the series-connected batteries, b. electrical switch actuator means arranged for connection across the battery providing the higher voltage output and responsive to a predetermined voltage drop across said battery to activate the switch means to connect the output of the generating means across only the battery providing the lower voltage output, and c. second electrical switch actuator means arranged for connection across the series-connected batteries and responsive to the predetermined voltage drop across the battery providing the higher voltage output to deactivate the switch means. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification