The invention discloses a downhill method and device for an electric vehicle and the vehicle. The method comprises the steps: detecting the current acceleration of the electric vehicle; when it is recognized that the electric vehicle is in the sliding working condition according to the current acceleration, calculating the braking torque of a driving motor according to the current acceleration and the preset sliding running speed; and controlling the driving motor to output the braking torque, so that the electric vehicle runs at the preset sliding running speed while the braking energy is recycled. Therefore, the problem that the energy recovery power and the stability control difficulty are high is solved, the braking energy recovery capacity of the electric drive system is adopted, negative torque is generated, kinetic energy of the vehicle is converted into electric energy to be stored in the battery, the electric energy is used for braking, and energy loss caused when the kinetic energy of the vehicle is converted into heat energy to be consumed during conventional braking is avoided; the endurance mileage of the vehicle is also increased.

    本申请公开了一种电动汽车的下坡方法、装置及车辆,其中,方法包括:检测电动汽车的当前加速度;在根据当前加速度识别电动汽车处于滑行工况时,根据当前加速度和预设滑行行驶速度计算驱动电机的制动扭矩;控制驱动电机输出制动扭矩,以在回收制动能量的同时,使得电动汽车以预设滑行驶速度行驶。由此,解决了能量回收功率的大小和稳定性控制难度较高的问题,采用电驱动系统的制动能量回收能力,产生负扭矩,将车辆的动能转化为电能,储存在电池内,利用电能制动,避免了车辆动能在常规制动时转化为热能消耗时的能量损失,也增加了车辆的续航里程。


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    Title :

    Downhill method and device for electric vehicle and vehicle


    Additional title:

    电动汽车的下坡方法、装置及车辆


    Contributors:
    LIU LIN (author) / ZHANG YOUJING (author) / ZHAI HAORONG (author) / JIANG WEI (author) / WANG XIAOHUI (author) / LIANG CHANGFEI (author) / SHA WENHAN (author)

    Publication date :

    2021-05-28


    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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