The present disclosure is directed to method of automatic circuit fault detection. The method includes inputting a common periodic wave voltage to each of a plurality of battery cells of a battery pack. Recursively calculated correlation coefficients for each neighboring pair of the battery cells are used to determine whether a common battery cell of two neighboring pairs is faulty. The disclosure further describes equalizers for multi-cell battery packs and series-connected battery strings. The equalizers can include a coupling capacitor comprising a plurality of small plates coupled between the two series-connected metal-oxide-semiconductor field-effect transistors (MOSFETs) connected to each battery cell, and a larger plate, wherein the larger plate is commonly coupled to all of the small plates. A plurality of battery string groups can be equalized, where each cell includes one transformer winding and a MOSFET. The MOSFETs are driven using one pair of complementary pulse width modulation signals.


    Access

    Download


    Export, share and cite



    Title :

    METHODS AND CIRCUITRY FOR FAULT DETECTION AND AUTOMATIC EQUALIZERS FOR BATTERY PACKS


    Contributors:
    MI CHUNTING (author) / LU FEI (author) / XIA BING (author) / SHANG YUNLONG (author)

    Publication date :

    2019-10-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



    Methods and circuitry for fault detection and automatic equalizers for battery packs

    MI CHUNTING / LU FEI / XIA BING et al. | European Patent Office | 2021

    Free access

    METHODS AND CIRCUITRY FOR FAULT DETECTION AND AUTOMATIC EQUALIZERS FOR BATTERY PACKS

    MI CHUNTING / LU FEI / XIA BING et al. | European Patent Office | 2018

    Free access

    Thermal event detection for battery packs

    JANARTHANAM SURIYAPRAKASH AYYANGAR / PERUMALLA KANCHANA / EFTEKHARI MOHAMMADREZA | European Patent Office | 2022

    Free access

    Model Based Change Detection Approach For Sensor Fault Identification in Battery Packs

    Herrera, Luis / Frierson, Anthony / Tsao, Bang-Hung et al. | IEEE | 2023