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Dual battery charge control

  • US 4,041,363 A
  • Filed: 09/19/1975
  • Issued: 08/09/1977
  • Est. Priority Date: 06/10/1974
  • Status: Expired due to Term
First Claim
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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:

  • 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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