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 of the battery; and a control circuit. The control circuit determines a capacity curve indicating a relationship between the battery voltage and a charge capacity in a set voltage range based on the voltage signal and the current signal collected at each unit time for a constant current charging period. The control circuit determines a differential curve indicating a relationship between the battery voltage and a differential capacity in the set voltage range based on the capacity curve. The control circuit determines an approximate straight line of the differential curve using a linear approximation algorithm, and determines whether lithium deposition is present in the battery based on the approximate straight line.


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    Title :

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


    Additional title:

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


    Contributors:

    Publication date :

    2024-03-13


    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



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