The invention discloses a torque control method and device for an electric vehicle, and relates to the technical field of new energy vehicles. The method comprises the steps that the actual torque of a motor in the electric automobile is obtained, and the required torque of the electric automobile is obtained; judging whether a difference value between the required torque and the actual torque is greater than a preset difference value; when the difference value between the required torque and the actual torque is greater than a preset difference value, integrating the difference value between the required torque and the actual torque according to a preset duration to obtain an unexpected acceleration risk degree index; and when the unexpected acceleration risk degree index is larger than a first preset value, the demand torque of the electric vehicle is limited based on the unexpected acceleration risk degree index. According to the method, the unexpected acceleration risk degree index is obtained based on the integral of the torque difference to the time, and the demand torque is limited based on the unexpected acceleration risk degree index to prevent unexpected acceleration and ensure the stability of power output of the electric vehicle, so that the driving experience and the kinetic energy safety of the electric vehicle are improved.

    本申请公开了一种电动汽车的扭矩控制方法及装置,涉及新能源汽车技术领域。该方法包括:获取电动汽车中电机的实际扭矩,并获取电动汽车的需求扭矩;判断需求扭矩和实际扭矩的差值是否大于预设差值;当需求扭矩和实际扭矩之间的差值大于预设差值时,按照预设时长对需求扭矩和实际扭矩的差值进行积分,得到非预期加速风险程度指数;当非预期加速风险程度指数大于第一预设值时,基于非预期加速风险程度指数,对电动汽车的需求扭矩进行限制。基于扭矩差值对时间的积分得到非预期加速风险程度指数,基于非预期加速风险程度指数对需求扭矩进行限制,以防止非预期加速,保证电动汽车的动力输出的稳定性,从而提高电动汽车的驾驶体验感和动能安全性。


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    Title :

    Torque control method and device of electric automobile


    Additional title:

    一种电动汽车的扭矩控制方法及装置


    Contributors:
    LEI WENWEN (author) / MA CHENGJIE (author) / SUI YANFENG (author) / YANG ZHIJIA (author) / ZHANG SIMIN (author)

    Publication date :

    2025-05-20


    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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