The invention relates to the technical field of new energy vehicles, in particular to a vehicle and a low-voltage power supply system thereof. The scheme comprises a low-voltage storage battery and a DC/DC, wherein the low-voltage storage battery is used for supplying power to part of low-voltage loads through a low-voltage power supply circuit when the DC/DC is not activated; the DC/DC is used for charging the low-voltage storage battery and supplying power to all low-voltage loads after being activated; the low-voltage power supply load comprises a VCU connected with a low-voltage storage battery, the low-voltage storage battery supplies power to the low-voltage power supply load, and when the VCU is in a standby state, the VCU cannot activate the DC/DC; when the VCU is in a working state, the VCU activates the DC/DC. According to the scheme, a low-voltage storage battery and a DC/DC supply power to a low-voltage load respectively under different working conditions, so that the low-voltage storage battery ensures safe operation of a vehicle within a time period as long as possible by utilizing limited electric quantity; based on the low power consumption mode of the VCU, the VCU is directly connected with the low-voltage storage battery, it is ensured that the VCU is switched from the standby state to the working state at any time, the circuit is simple, and control is convenient and fast.

    本发明涉及新能源汽车技术领域,特别是涉及一种车辆及其低压供电系统。本方案包括低压蓄电池和DC/DC,低压蓄电池用于通过低压供电电路在DC/DC未被激活时为部分低压负载供电;DC/DC用于在自身被激活后为低压蓄电池充电以及并为所有低压负载供电;低压供电负载包括有与低压蓄电池相连的VCU,并由低压蓄电池为其供电,当VCU处于待机状态时,VCU不能激活DC/DC;当VCU处于工作状态时,VCU激活DC/DC。该方案由低压蓄电池和DC/DC在不同的工况下分别为低压负载供电,以使低压蓄电池利用有限的电量在尽可能长的时间段内确保车辆安全运行;基于VCU具备低功耗模式,将其和低压蓄电池直接相连,确保VCU随时从待机状态向工作状态的切换,电路简单且控制方便快捷。


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    Title :

    Vehicle and low-voltage power supply system thereof


    Additional title:

    一种车辆及其低压供电系统


    Contributors:
    GAO WANBING (author) / LI HONGXING (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 / 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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