The invention relates to the technical field of electric vehicle braking control, in particular to a braking energy recovery coordination method and device for an electric vehicle, and the method comprises the steps: calculating the current road adhesion coefficient of a road surface where the electric vehicle is located according to the actual wheel speed slippage and motor torque of the electric vehicle; the actual braking intention of the driver is recognized according to the whole vehicle deceleration change rate of the electric vehicle; and when the electric vehicle is controlled to brake based on the anti-lock condition, energy recovery is carried out according to the road surface state of the road surface determined according to the current road surface adhesion coefficient and an optimal energy recovery strategy matched with the actual braking intention. Therefore, the technical problems that in the related technology, electric braking is overlaid on the basis of hydraulic braking of an electric automobile, coordination control over hydraulic braking and electric braking is not achieved, the automobile is prone to being locked, maximum braking energy recovery cannot be conducted, energy is wasted, and the use requirement of a user cannot be met are solved.

    本申请涉及电动汽车制动控制技术领域,特别涉及一种电动汽车的制动能量回收协调方法及装置,其中,方法包括:根据电动汽车的实际车轮轮速滑移和电机扭矩计算电动汽车所处路面的当前路面附着系数;根据电动汽车的整车减速度变化率识别驾驶员的实际制动意图;基于防抱死条件控制电动汽车对电动汽车进行制动的同时,按照根据当前路面附着系数确定的所处路面的路面状态和实际制动意图匹配最佳能量回收策略进行能量回收。由此,解决了相关技术中电动汽车在液压制动基础上叠加电制动,没有液压制动与电制动进行协调控制,容易造成车辆抱死,且无法进行最大化的制动能量回收,造成能源浪费,无法满足用户的使用需求等技术问题。


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    Titel :

    Braking energy recovery coordination method and device of electric vehicle


    Weitere Titelangaben:

    电动汽车的制动能量回收协调方法及装置


    Beteiligte:
    YANG DESHENG (Autor:in)

    Erscheinungsdatum :

    2022-07-01


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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