| 主权项 |
1. A battery state estimation device, comprising:
a current detector for detecting, as a current measured value, a current of a secondary battery; a voltage detector for detecting, as a voltage measured value, a terminal voltage of the secondary battery; a state variable filter operator which defines a battery model of the secondary battery, wherein by using a state variable filter which is based on the battery model, the state variable filter operator subjects to a state quantity conversion the current measured value and the voltage measured value to thereby calculate a conversion state quantity, and from the conversion state quantity, the state variable filter operator estimates, as a voltage estimated value, the terminal voltage of the secondary battery which terminal voltage is based on the battery model; and an adaptive identification operator for identifying a parameter of the secondary battery such that a difference between the voltage measured value and the voltage estimated value is converged to zero, wherein the adaptive identification operator subjects the voltage measured value and the voltage estimated value to a filter treatment by a low pass filter having a common high frequency breaking characteristic and calculates the difference by using the voltage measured value and the voltage estimated value which are subjected to the filter treatment by the low pass filter. |
