| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device of a secondary battery capable of precisely estimating a parameter necessary for the estimation of SOC.SOLUTION: A control device of a secondary battery is mounted on a vehicle which uses at least a motor as a driving source. The control device includes the secondary battery, a mode time measurement part, a stop detection part, a charge detection part and a control part which is connected so as to permit communication with them and, at the same time, estimates a characteristic parameter in an equivalent circuit of the secondary battery. The equivalent circuit has an impedance circuit group which corresponds to a time constant related to charging/discharging and is constituted with at least one impedance circuit defined by the characteristic parameter. The control part, after the stop detection part detects stopping of the vehicle, estimates an initial value of a charge accumulated on the impedance circuit on the basis of a traveling mode before the stopping of the vehicle and a duration time thereof and, further, it is judged whether the characteristic parameter is estimated or not on the basis of the initial value and the presence/absence of electricity charging after stopping the vehicle.SELECTED DRAWING: Figure 4 |
