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Battery control circuit responsive to external signal input

  • US 8,957,638 B2
  • Filed: 06/01/2012
  • Issued: 02/17/2015
  • Est. Priority Date: 06/09/2011
  • Status: Active Grant
First Claim
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1. A charge/discharge control circuit for controlling charge/discharge of a secondary battery, the secondary battery connected to an external terminal by charge and discharge transistors, the charge/discharge control circuit comprising:

  • a switch circuit for controlling a current that flows through the charge/discharge control circuit;

    a control circuit for controlling an operation of the switch circuit and the charge and discharge transistors;

    an input terminal that receives an external signal for controlling an operation of the charge/discharge control circuit;

    an external signal detection circuit connected to the input terminal; and

    a charge/discharge monitoring circuit,wherein the external signal detection circuit is connected to a positive terminal of the secondary battery via the switch circuit, and the charge/discharge monitoring circuit is connected to the positive terminal of the secondary battery via the switch circuit.

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