A relay diagnosis apparatus according to the present disclosure is for a parallel pack assembly including a first battery pack having a first battery module and a first positive relay and a second battery pack having a second battery module and a second positive relay, and includes a diagnosis unit including a diagnosis switch and a diagnosis resistor connected between a first pack terminal and a second pack terminal, a first detector to detect a current of the first battery module, a second detector to detect a current of the second battery module, and a control unit to collect a first detection value from the first detector and a second detection value from the second detector in a first diagnosis period during which the first and second positive relays are in an open operational state and the diagnosis switch is in a closed operational state. The control unit determines a stuck-closed fault of the first positive relay and a stuck-closed fault of the second positive relay based on the first detection value, the second detection value and a first threshold.


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    Title :

    RELAY DIAGNOSIS DEVICE, RELAY DIAGNOSIS METHOD, BATTERY SYSTEM, AND ELECTRIC VEHICLE


    Additional title:

    RELAISDIAGNOSEVORRICHTUNG, RELAISDIAGNOSEVERFAHREN, BATTERIESYSTEM UND ELEKTRISCHES FAHRZEUG
    DISPOSITIF DE DIAGNOSTIC DE RELAIS, PROCÉDÉ DE DIAGNOSTIC DE RELAIS, SYSTÈME DE BATTERIE ET VÉHICULE ÉLECTRIQUE


    Contributors:

    Publication date :

    2023-07-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES