A battery diagnosis apparatus according to the present disclosure includes a voltage sensor to generate a voltage signal indicating a battery voltage of a battery; a current sensor to generate a current signal indicating a battery current flowing through the battery; and a control circuit. The control circuit determines a measured capacity curve over a predetermined set voltage range based on the voltage signal and the current signal collected at each unit time for a constant current period during which the battery is charged or discharged at a predetermined current rate over the set voltage range. The control circuit determines a measured differential curve over the set voltage range based on the measured capacity curve. The control circuit determines whether a negative electrode tortuosity of the battery abnormally increased by comparing the measured differential curve with a reference differential curve.


    Access

    Download


    Export, share and cite



    Title :

    BATTERY DIAGNOSIS DEVICE, BATTERY DIAGNOSIS METHOD, BATTERY PACK, AND ELECTRIC VEHICLE


    Additional title:

    BATTERIEDIAGNOSEVORRICHTUNG, BATTERIEDIAGNOSEVERFAHREN, BATTERIEPACK UND ELEKTROFAHRZEUG
    DISPOSITIF DE DIAGNOSTIC DE BATTERIE, PROCÉDÉ DE DIAGNOSTIC DE BATTERIE, BLOC-BATTERIE ET VÉHICULE ÉLECTRIQUE


    Contributors:

    Publication date :

    2024-04-24


    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 / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



    BATTERY DIAGNOSIS DEVICE, BATTERY PACK, ELECTRIC VEHICLE, AND BATTERY DIAGNOSIS METHOD

    LEE SUN-JONG / KIM CHEOL-TAEK / SUNG YONG-CHUL | European Patent Office | 2023

    Free access

    BATTERY DIAGNOSIS DEVICE, BATTERY PACK, ELECTRIC VEHICLE, AND BATTERY DIAGNOSIS METHOD

    LEE SUN-JONG / KIM CHEOL-TAEK / SUNG YONG-CHUL | European Patent Office | 2024

    Free access

    BATTERY DIAGNOSIS DEVICE, BATTERY DIAGNOSIS METHOD, BATTERY PACK AND ELECTRIC VEHICLE

    KIM YOUNG-JIN | European Patent Office | 2022

    Free access

    BATTERY DIAGNOSIS DEVICE, BATTERY DIAGNOSIS METHOD, BATTERY PACK AND ELECTRIC VEHICLE

    KIM YOUNG-JIN | European Patent Office | 2024

    Free access