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CONTROL APPARATUS AND CONTROL METHOD FOR SECONDARY BATTERY

  • US 20100241376A1
  • Filed: 09/17/2008
  • Published: 09/23/2010
  • Est. Priority Date: 11/13/2007
  • Status: Abandoned Application
First Claim
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1. A control apparatus for a secondary battery mounted on a vehicle, comprising:

  • a detection unit detecting a charging current value to said secondary battery and a discharging current value from said secondary battery; and

    a control unit connected to said detection unit,said control unit storing a history of said charging current value and said discharging current value detected by said detection unit, presuming a change in unevenness of ion concentration in an electrolyte in said secondary battery based on said stored history, calculating an evaluation value related to deterioration of said secondary battery due to discharging to correspond to the change in said unevenness of the ion concentration, and controlling an upper limit value of discharging power from said secondary battery based on said calculated evaluation value,said control unit shifting said evaluation value to a deterioration side when it is presumed that said unevenness of the ion concentration is increased, shifting said evaluation value to a non-deterioration side when it is presumed that said unevenness of the ion concentration is reduced, and setting said upper limit value of the discharging power when said evaluation value shifts to the deterioration side beyond a target value predetermined to be able to avoid the deterioration of said secondary battery due to discharging, to be lower than said upper limit value of the discharging power when said evaluation value does not shift to the deterioration side beyond said target value.

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