| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a battery state estimation device which is capable of accurately estimating an internal state of a battery even when a value of a parameter of a slow response part of an equivalent circuit model of the battery is deviated from its fixed value due to variation or aging of the battery.SOLUTION: The battery state estimation device includes: parameter successive estimation means 10 which uses a preserved fixed value of a slow response part BM2 of a battery equivalent circuit model BM to successively estimate a value of a parameter of a fast response part of the battery equivalent circuit model on the basis of a charge/discharge current value and a terminal voltage value; data recording means which records the charge/discharge current value and the terminal voltage; update parameter estimation means 8 which estimates a value of the parameter of the slow response part of the model on the basis of recorded data when a vehicle stops; and parameter updating means 11 which substitutes the fixed value of the parameter of the slow response part, which is previously preserved, with the value of the parameter of the slow response part calculated by the update parameter estimation means 8.</p> |
