BATTERY CHARACTERISTIC ESTIMATION DEVICE, BATTERY CHARACTERISTIC ESTIMATION METHOD, AND PROGRAM

To estimate battery impedance with high accuracy.SOLUTION: A battery characteristic estimation device includes: a first calculation unit that calculates a first electric characteristic value of a secondary battery, based on frequency-dependent data that is data of an output voltage of the secondary battery which changes according to a frequency of an AC current applied to the secondary battery; a second calculation unit that calculates a second electric characteristic value of the second battery, based on transient response data that is data of an output voltage of the secondary battery that attenuates in response to a change of a DC current applied to the secondary battery; and an estimation unit that estimates an electric characteristic value of the secondary battery, based on the first electric characteristic value and the second electric characteristic value.SELECTED DRAWING: Figure 1 【課題】精度高くバッテリのインピーダンスを推定する。【解決手段】二次電池に印加される交流電流の周波数により変化する前記二次電池の出力電圧のデータである周波数依存データに基づいて、前記二次電池の第一電気特性値を演算する第一演算部と、前記二次電池に印加される直流電流の変化により減衰する 前記二次電池の出力電圧のデータである過渡応答データに基づいて、前記二次電池の第二電気特性値を演算する第二演算部と、前記第一電気特性値及び前記第二電気特性値に基づいて、前記二次電池の電気特性値を推定する推定部と、を備えるバッテリ特性推定装置。【選択図】図１