The invention provides a new energy vehicle power domain control reverse dragging protection method which comprises the following steps that a whole vehicle is dragged under the condition that a power source is turned off, and a motor generates counter electromotive force to charge a direct current bus capacitor; power is supplied to the power management chip through the flyback circuit; waking up the domain controller; the domain controller awakens a low-voltage power supply system of the whole vehicle and monitors temperature information and the rotating speed of a motor through inter-nuclear communication, and the temperature information comprises the temperature of the motor and the temperature of an electric control module; the heat management system carries out heat dissipation and cooling according to the motor temperature and the electric control module temperature; and when the rotating speed of the motor is identified to be greater than the preset rotating speed upper limit value, the motor enters an active short-circuit mode, and the motor system loop heat management system works according to the maximum heat dissipation capability. Safety monitoring can be effectively carried out on the motor and electric control, and the risks of motor overheating and vehicle spontaneous combustion are reduced.

    本发明提供了一种新能源车辆动力域控反拖保护方法,包括如下步骤:整车在电源关闭情况下被拖车,电机产生反电动势给直流母线电容充电;通过反激电路给电源管理芯片供电;唤醒域控制器;所述域控制器唤醒整车低压供电系统,通过核间通讯监控温度信息和电机转速,所述温度信息包括电机温度、电控模块温度;热管理系统根据所述电机温度、所述电控模块温度进行散热冷却;当识别到电机转速大于预设转速上限值时,电机进入主动短路模式,电机系统回路热管理系统按最大散热能力进行工作。本发明能够有效对电机、电控进行安全监控,降低电机过热和车辆自燃风险。


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    Title :

    New energy vehicle power domain control reverse dragging protection method


    Additional title:

    一种新能源车辆动力域控反拖保护方法


    Contributors:
    XU SHIHUA (author) / WAN YUXUAN (author) / YANG KEWEN (author) / YOU DAOLIANG (author) / LUO XUWEI (author)

    Publication date :

    2025-05-13


    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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