This paper proposes a novel pack-to-multicell topology to equalize the voltage distribution of a series lithium battery pack. Switched-capacitor converters are implemented in a series-parallel configuration to simultaneously allow energy transfer from the entire pack to every cell. Those switched capacitors act as intermediary energy storage on equalization paths between each cell. The series-parallel term refers to two equalization phases of the switched-capacitor. At the series-connected phase, each capacitor is connected to its corresponding cell, so the cell’s voltage and capacitor’s voltage would be equalized. Subsequently, in the parallel-connected phase, all capacitors are connected so that they are set to the desired voltage value regulated by a DC/DC converter. The experimental setup of the proposed system has been tested on four series-connected 3000 mAh lithium cells, which have a large spread of initial voltages (2.69-3.92 volt). The experimental results show convergence of the cell’s voltages without over-equalization and a charge transfer efficiency of about 87%.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Pack-to-Multicell Equalization of Lithium Battery String Based on Series-Parallel Topology of Switched-Capacitor Circuit


    Beteiligte:


    Erscheinungsdatum :

    14.09.2022


    Format / Umfang :

    379086 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    A resonant switched-capacitor balancing strategy for series battery pack

    Zhiqiang Wang / Cuili Chen / Yulong Zhang et al. | IEEE | 2014


    Series-parallel battery pack active equalization method based on single inductor

    GUO XIANGWEI / LIU ZHEN / ZHU JUN et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    Composite battery pack equalization circuit

    XUAN DONGJI / WANG BIAO / CHENG TAIHONG et al. | Europäisches Patentamt | 2020

    Freier Zugriff


    Multi-channel lithium battery PACK equalization equipment

    HUANG ZHOUCHUN | Europäisches Patentamt | 2020

    Freier Zugriff