Ah counting is not a satisfactory method for the estimation of the state of charge (SOC) of a battery, as the initial SOC and coulomb efficiency are difficult to measure. To address this issue, an equivalent coulomb efficiency is defined and a new SOC estimation method, denoted as 'KalmanAh', is proposed. This method uses the Kalman filtering method to correct for the initial value used in the Ah counting method. A Ni/MH battery test, consisting of 8.08 continuous federal urban driving schedule (FUDS) cycles, is carried out to verify the method. The approximate initial SOC of the battery pack is given, and the EKF approach based on the single-variable battery model is used to make the initial SOC converge to its real value. The SOC estimation error is 2.5 % when compared with the real SOC obtained from a discharge test. This compares favorably with an estimation error of 11.4 % when using Ah counting.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Combined state of charge estimator for electric vehicle battery pack


    Weitere Titelangaben:

    Kombiniertes Ladungszustand-Schätzsystem für das Batteriepaket in Elektrofahrzeugen


    Beteiligte:
    Wang, Junping (Autor:in) / Cao, Binggang (Autor:in) / Chen, Quanshi (Autor:in) / Wang, Feng (Autor:in)

    Erschienen in:

    Control Engineering Practice ; 15 , 12 ; 1569-1576


    Erscheinungsdatum :

    2007


    Format / Umfang :

    8 Seiten, 7 Bilder, 1 Tabelle, 16 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    Adaptive state of charge estimator for lithium-ion cells series battery pack in electric vehicles

    Xiong, Rui / Sun, Fengchun / Gong, Xianzhi et al. | Tema Archiv | 2013


    BATTERY PACK FOR ELECTRIC VEHICLE, AND ELECTRIC VEHICLE COMPRISING BATTERY PACK

    ZHANG JIANPING / QIU DANLIANG / LIU MENG et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    BATTERY PACK AND ELECTRIC VEHICLE INCLUDING BATTERY PACK

    JANG SUNGHWAN / SEONG JUNYEOB | Europäisches Patentamt | 2023

    Freier Zugriff

    BATTERY PACK HOUSING, BATTERY PACK, AND ELECTRIC VEHICLE

    WANG XIAOPENG / PENG QINGBO / LU ZHIPEI et al. | Europäisches Patentamt | 2023

    Freier Zugriff