BATTERY STATUS ESTIMATION DEVICE,申请号JP20110019822-传众专利搜索

BATTERY STATUS ESTIMATION DEVICE

申请公布号：JP2012159414(A)

申请号：JP20110019822

申请日期：2011.02.01

申请公布日期：2012.08.23

申请人：

NISSAN MOTOR CO LTD

发明人：UMEKI SHIHO;NAKAMURA HIDEO;TAZOE KAZUHIKO

分类号：G01R31/36;H01M10/48

主分类号：G01R31/36

摘要：<P>PROBLEM TO BE SOLVED: To provide a battery status estimation device capable of enhancing calculation accuracy of the internal state of a secondary battery including a nonlinear region thereof. <P>SOLUTION: A battery status estimation device includes: current detection means for detecting a current of a secondary battery as a current measuring value; voltage detection means for detecting a terminal voltage of the secondary battery as a voltage measurement value; terminal voltage estimation means that defines a battery model of the secondary battery, and calculates a conversion state quantity by a state quantity conversion of the current measuring value and the voltage measurement value by using a state variable filter based on the battery model in order to estimate a terminal voltage of the secondary battery based on the battery model as a voltage estimation value, from the conversion state quantity; identification means for identifying a parameter of the secondary battery so that a difference between the voltage measurement value and the voltage estimation value converges to zero; and nonlinear region detection means for detecting a presence ratio of a nonlinear region in characteristics between current and voltage in the secondary battery. The terminal voltage estimation means sets a cutoff frequency of the state variable filter according to the presence ratio. <P>COPYRIGHT: (C)2012,JPO&INPIT