| 摘要 |
<p>Provided are a battery state estimation device and a method of estimating a battery state wherein a parameter of a rechargeable battery is identified with high accuracy. The current and the terminal voltage of the rechargeable battery are detected, the terminal voltage of a rechargeable battery is estimated based on a given battery model using the detected current and the measured value of the terminal voltage, and the parameter of the rechargeable battery is identified such that the difference between the measured value of the terminal voltage and the estimated value of the terminal voltage converges to zero. When identifying the parameter of the rechargeable battery, filtering of the measured value of the terminal voltage and the estimated value of the terminal voltage is applied respectively thereon using a low pass filter having the common high frequency breaking characteristics, and the measured value of the terminal voltage and the estimated value of the terminal voltage to which the filtering was applied are used.</p> |
