The invention relates to a vehicle power supply system, a control method of the vehicle power supply system and a vehicle. In the vehicle power supply system, a first DCDC conversion module is electrically connected with a power battery system through a first switch unit; the second DCDC conversion module is electrically connected with the power battery system; the first switch unit is a normally closed switch; the first DCDC conversion module is also electrically connected with the second switch unit; the rated power of the first DCDC conversion module is smaller than that of the second DCDC conversion module; the first DCDC conversion module and the second DCDC conversion module are both used for converting high voltage provided by the power battery system into low voltage. The first DCDC conversion module provided by the embodiment of the invention is relatively small in structure and relatively low in cost, and the first DCDC conversion module is arranged in the whole vehicle, so that the weight and the cost of the vehicle can be reduced, and miniaturization of the vehicle is facilitated.

    本公开涉及一种车辆供电系统、车辆供电系统的控制方法以及车辆,车辆供电系统中,第一DCDC转换模块通过第一开关单元与动力电池系统电连接;第二DCDC转换模块与动力电池系统电连接;第一开关单元为常闭开关;第一DCDC转换模块还与第二开关单元电连接;第一DCDC转换模块的额定功率小于第二DCDC转换模块的额定功率;第一DCDC转换模块和所述第二DCDC转换模块均用于将动力电池系统提供的高压转换为低压。本公开实施例提供的第一DCDC转换模块结构较小、成本较低,将其设置在整车中,能够减轻车辆重量以及成本,有利于车辆小型化。


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    Title :

    Vehicle power supply system, control method of vehicle power supply system and vehicle


    Additional title:

    一种车辆供电系统、车辆供电系统的控制方法以及车辆


    Contributors:
    YE FEI (author) / SU LILUN (author) / HU CHENGSHUAI (author) / ZHANG CHIWEI (author)

    Publication date :

    2025-03-21


    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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