Battery charging device

  • US 4,680,528 A
  • Filed: 03/04/1986
  • Issued: 07/14/1987
  • Est. Priority Date: 03/05/1985
  • Status: Expired due to Term
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First Claim
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1. A battery charging device, comprising:

  • a DC power source, output terminals for a battery, and a charging-starter switch connected between said DC power source and said output terminals so as to provide DC power at the output terminals by turning on the charging-starter switch;

    a current detecting circuit connected to the output terminals for detecting whether or not a battery is connnected to the output terminals and for detecting a current flowing to the battery;

    a voltage control circuit responsive to a signal derived from said current detecting circuit to provide a charging voltage or stand-by voltage of a predetermined magnitude at the output terminals; and

    a current control circuit responsive to said signal to charge the battery with a current of a predetermined magnitude;

    said current detecting circuit being OR-connected to said voltage control circuit and to said current control circuit.

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