This application relates to the technical field of electric vehicles, and in particular, to a low-voltage battery charging system and method. The charging system includes: a low-voltage battery capable of supplying power to a low-voltage electrical device of a vehicle; a power battery module; a direct current-to-direct current converter capable of receiving a voltage supplied by the power battery module when a positive relay and a negative relay of the power battery module are closed, and converting the voltage into a charging voltage of the low-voltage battery, so as to charge the low-voltage battery; and a DC-DC controller electrically connected to the low-voltage battery and capable of monitoring the voltage of the low-voltage battery when the vehicle is in a dormant state, where the DC-DC controller is communicatively connected to a battery management system of the vehicle, to wake up the battery management system when the voltage of the low-voltage battery is lower than a first threshold, such that the battery management system closes the positive relay and the negative relay of the power battery module.


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    Title :

    LOW-VOLTAGE BATTERY CHARGING SYSTEM AND METHOD


    Additional title:

    NIEDERSPANNUNGSBATTERIELADESYSTEM UND -VERFAHREN
    SYSTÈME ET PROCÉDÉ DE RECHARGE DE BATTERIE BASSE TENSION


    Contributors:
    SONG TIANZHU (author) / SUN JIAN (author) / WANG HUI (author) / YANG LULU (author)

    Publication date :

    2023-11-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

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



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