| 摘要 |
PROBLEM TO BE SOLVED: To determine voltage reduction caused by concentration polarization of a battery at an early stage and dissolve it immediately.SOLUTION: In a charge/discharge control device for battery, a concentration polarization Vc of a battery 11 is calculated by a concentration polarization calculation unit 24, an average concentration polarization AVE.Vc, which is an average value of the concentration polarization Vc per unit time, is calculated by an average concentration polarization calculation unit 26, a continuous charge/discharge time t during a period when the battery 11 is continuously charged/discharged is calculated by a continuous charge/discharge time calculation unit 25, and necessity of reducing the concentration polarization is determined on the basis of the average concentration polarization AVE.Vc and the continuous charge/discharge time t by a concentration polarization reduction necessity determination unit 27. A maximum current value setting unit 28 sets a maximum current value according to the necessity determination of reducing the concentration polarization so that a current control unit limits current charging/discharging the battery 11 to be the maximum current value or less, therefore current is reduced before the concentration polarization Vc is expanded due to charging/discharging the battery 11 with excessive current, and voltage reduction caused by increasing inner electrical resistance can be minimized. |
