The invention discloses an electric vehicle braking energy recovery method. The method comprises the steps of S11, acquiring driving parameters and equipment parameters of an electric vehicle; S12, calculating a motor braking torque instruction according to the braking time, enabling the motor braking torque instruction Teb** to linearly increase along with the counting value of the braking time and approach to the rated braking torque Te of the motor; S13, calculating a target braking torque instruction according to the rotating speed of the motor and the maximum charging power of the battery; and S14, calculating a current braking torque instruction according to the SOC value of the battery and the temperature of the battery. The method has the advantages that the driving experience of adriver is improved; the energy recovery efficiency is improved; and the damage to the battery caused by long-time high-current charging is prevented, and the service life of the battery is ensured.

    本发明公开了一种电动车制动能量回收方法。它包括以下步骤:S11、获取电动车的行驶参数以及设备参数;S12、根据刹车时间计算出电机制动转矩指令,令电机制动转矩指令Teb**随刹车时间计数值呈线性增长,并向电机额定制动转矩Te逼近;S13、根据电机转速和电池最大充电功率计算出目标制动转矩指令;S14、根据电池SOC值、电池的温度计算出当前制动转矩指令。其优点在于:提高了驾驶员的驾驶体验;提高了能量回收效率;防止了长时间大电流充电对电池造成伤害,保证了电池的使用寿命。


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    Title :

    Electric vehicle braking energy recovery method


    Additional title:

    一种电动车制动能量回收方法


    Contributors:
    CHEN QINGFU (author) / HU WEICHAO (author) / ZHOU LESHUAN (author) / JIAN RUIQIAN (author) / NING DESHENG (author)

    Publication date :

    2021-03-05


    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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