The invention relates to the technical field of new energy vehicles, in particular to a vehicle low-voltage power supply system and an electric vehicle. The scheme comprises a storage battery and a DC/DC, one end of the DC/DC is used for being connected with a power battery, the other end of the DC/DC is connected with the storage battery and a low-voltage load and used for charging the storage battery and supplying power to the low-voltage load, and the storage battery is used for being connected with an emergency load and 24-hour constant electric equipment through a low-voltage power supply circuit. If yes, the DC/DC converts the high-voltage direct current of the power battery into low-voltage direct current to supply power to the low-voltage load; and if the power battery or the DC/DC fails, the storage battery supplies power to the emergency load and the 24-hour constant power equipment. According to the scheme, normal power supply for the emergency load and 24-hour constant electric equipment of the vehicle can be ensured, the stability and reliability of low-voltage power supply of the vehicle are guaranteed, the system cost is low, and the structure is simple.

    本发明涉及新能源汽车技术领域,特别是涉及一种车辆低压供电系统及电动汽车。本方案包括蓄电池和DC/DC,DC/DC的一端用于连接动力电池,另一端与蓄电池和低压负载连接,用于为蓄电池充电以及为低压负载供电,蓄电池通过低压供电电路用于连接应急负载和24h常电设备,若动力电池和DC/DC均正常,则由DC/DC将动力电池的高压直流电转换为低压直流电为低压负载供电;若动力电池或DC/DC故障,则由蓄电池为应急负载和24h常电设备供电。本方案不仅能够确保为车辆的应急负载和24h常电设备正常供电,保障车辆低压供电的稳定性和可靠性,而且系统成本低、结构简单。


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    Title :

    Vehicle low-voltage power supply system and electric vehicle


    Additional title:

    一种车辆低压供电系统及电动汽车


    Contributors:
    GAO WANBING (author) / LI LONG (author) / XIAO DANDAN (author)

    Publication date :

    2023-08-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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