Hybrid-electric and pure electric vehicles include a traction battery comprised of many cells. During repeated charge and discharge cycles, the state of charge of the cells may vary from cell to cell. To optimize traction battery usage, it is desirable that the state of charge of the cells be equalized. Cell balancing can equalize the states of charge and improve battery performance. To achieve proper cell balancing, an accurate state of charge value should be known for each cell. An accurate state of charge value may be achieved when a persistent excitation condition and an estimation convergence condition are met. If the conditions are not met, active excitation of the battery may be performed to improve the chances of meeting the conditions. Cell balancing may be initiated and terminated according to state of charge values estimated when the conditions are satisfied.


    Access

    Download


    Export, share and cite



    Title :

    State of Charge Quality Based Cell Balancing Control


    Contributors:
    LI YONGHUA (author)

    Publication date :

    2015-08-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



    State of charge quality based cell balancing control

    LI YONGHUA | European Patent Office | 2016

    Free access

    ACTIVE BATTERY STATE-OF-CHARGE BALANCING

    WANG YUE-YUN / HAO LEI | European Patent Office | 2025

    Free access

    Margin-based battery charge balancing

    DIAMOND STEVEN / RISK GABRIEL / HU STANLEY et al. | European Patent Office | 2017

    Free access

    STATE OF CHARGE BALANCING IN SPLIT BATTERY SYSTEM

    MU MINGKAI / SENOR HARRISON / BISKUP RICHARD J et al. | European Patent Office | 2024

    Free access

    STATE OF CHARGE BALANCING IN SPLIT BATTERY SYSTEM

    MU MINGKAI / SENOR HARRISON / BISKUP RICHARD J et al. | European Patent Office | 2024

    Free access