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CHARGE CONTROL CIRCUIT, BATTERY PACK, AND CHARGE SYSTEM

  • US 20110267009A1
  • Filed: 06/04/2010
  • Published: 11/03/2011
  • Est. Priority Date: 06/18/2009
  • Status: Active Grant
First Claim
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1. A charge control circuit, comprising:

  • a charge control unit that controls an operation of a charging unit that charges a rechargeable battery;

    a voltage detection unit that detects a terminal voltage of the rechargeable battery; and

    a current detection unit that detects a current flowing in the rechargeable battery;

    wherein if a current value detected by the current detection unit exceeds an anomalous current threshold value set to a value that exceeds a current value requested to the charging unit, and when the terminal voltage of the rechargeable battery as detected by the voltage detection unit is equal to or greater than a second threshold-value voltage that is set beforehand to a voltage value lower than a full charge voltage being a terminal voltage at a time when the rechargeable battery is in full charge, the charge control unit carries out a first anomaly response process of requesting, to the charging unit, a charge voltage of the second threshold value voltage, and of carrying out the constant voltage charging through supply of that charge voltage to the rechargeable battery.

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