METHODE DE DIAGNOSTIC IN SITU DE BATTERIES PAR SPECTROSCOPIE D'IMPEDANCE ELECTROCHIMIQUE
    1.
    发明公开
    METHODE DE DIAGNOSTIC IN SITU DE BATTERIES PAR SPECTROSCOPIE D'IMPEDANCE ELECTROCHIMIQUE 审中-公开
    电池时现场诊断的电化学阻抗谱法

    公开(公告)号:EP2537040A1

    公开(公告)日:2012-12-26

    申请号:EP11709980.4

    申请日:2011-02-11

    IPC分类号: G01R31/36

    CPC分类号: G01R31/3651

    摘要: The invention relates to a method for estimating the inner state of an electrochemical system for storing electrical energy, such as a battery. For different inner states of the same type of batteries as the analysed battery, impedance measurements are carried out by adding an electrical signal to the current flowing through the batteries. Then, an RC circuit is defined for modeling said impedances. A relation between the Soc (and/or the SoH) and the parameters of the RC circuit is then calibrated by means of a multi-varied statistical analysis. An impedance measurement of the analysed battery is carried out, and then modelled by means of the RC circuit. Then, by applying the relation to the parameters of the equivalent electric circuit, defined for the analysed battery, the inner state of said battery is estimated.