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Battery control apparatus and battery control method

  • US 9,438,059 B2
  • Filed: 12/16/2011
  • Issued: 09/06/2016
  • Est. Priority Date: 12/16/2010
  • Status: Active Grant
First Claim
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1. A battery control apparatus comprising:

  • a voltage detection unit that measures a voltage of each of cells;

    a charging rate calculation unit that calculates a charging rate of each of the cells based on the measured voltage and a charging-rate to voltage table which is stored in a storage unit;

    a current integration unit that calculates an integrated current value by integrating current values of a battery pack configured with a plurality of the cells;

    a cell capacity estimation unit that calculates a battery capacity value of each of the cells based on the integrated current value, and the charging rate of each of the cells;

    a dischargeable capacity value calculation unit that calculates a dischargeable capacity value of each of the cells from the battery capacity value and charging rate thereof; and

    a control unit that controls charging or discharging of the battery pack based on the dischargeable capacity value of each of the cellsa remaining capacity comparison unit that compares the dischargeable capacity value and a predetermined target remaining capacity value,wherein the control unit, as a result of the comparison between the dischargeable capacity value and the target remaining capacity value, discharges a cell having the dischargeable capacity value larger than the target remaining capacity value until the dischargeable capacity value reaches the target remaining capacity value.

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