This method for diagnosing a battery pack having a configuration in which a plurality of cells are connected in series, using a system for obtaining detected data including the current and temperature of the battery pack and the voltage of each cell, includes: a step of calculating an electric charge capacity and a state of charge (SOC) of each cell, using the current and the temperature, the voltage of each cell, an open circuit voltage (OCV) - SOC function, and an OCV - resistance table, and calculating an amount of unbalance, which is an estimated value of the SOC, and the resistance for each cell when the battery pack is fully charged; and a step of calculating the energy capacity of the battery pack using the electric charge capacity, the amount of unbalance, and the resistances. As a result, the energy capacity of the battery pack can be calculated accurately, even in an unbalanced state.


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    Titel :

    Battery pack diagnosing method, cell diagnosing method, battery pack diagnosing device, and cell diagnosing device


    Beteiligte:
    INOUE TAKESHI (Autor:in) / HIRASAWA SHIGEKI (Autor:in) / ISHIMARU TETSUYA (Autor:in) / HONKURA KOHEI (Autor:in) / MAKINO SHIGEKI (Autor:in) / KAWAJI JUN (Autor:in)

    Erscheinungsdatum :

    2024-03-07


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / G16Y / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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