The invention provides a power distribution method, device and system of a hybrid electric vehicle. The power distribution method provided by the invention is applied to a parallel hybrid power systemcomprising a motor and an engine. The power distribution method comprises the following steps: judging whether the current state of charge of a battery is lower than a set threshold value or not; andwhen the current state of charge of the battery is lower than a set threshold value, the target torque distributed to the motor comprising a first torque which is used for maintaining the current ofthe battery to be zero. The power distribution method provided by the invention is mainly used for the parallel hybrid power system, and via the power distribution method, when the hybrid electric vehicle carries out high-speed self-adaptive cruising, the problem of secondary energy conversion caused by the fact that the vehicle automatically enters a charging mode is avoided, meanwhile, the torque for driving the vehicle and maintaining the work of high-voltage electric accessories is guaranteed, the fuel economy of the whole vehicle is improved, and the service life of the battery can be prolonged due to the fact that the charging and discharging processes of the battery in the vehicle driving process are reduced.

    本发明提出一种混合动力汽车的功率分配方法、装置及系统。本发明提出的功率分配方法用于包括电机和发动机的并联式混合动力系统,包括步骤:判断电池当前的荷电状态是否低于设定的阈值;当电池当前的荷电状态低于设定的阈值时,向电机分配的目标扭矩包括第一扭矩,第一扭矩用于将电池的电流维持在零。本发明提出的功率分配方法主要用于并联式混合动力系统,通过该功率分配方法,在混合动力汽车高速自适应巡航时,规避了车辆自动进入充电模式而导致的能量二次转换问题,同时保证了驱动车辆以及维持高压用电附件工作的扭矩,提高了整车的燃油经济性,由于减少了车辆行驶过程中电池的充放电过程,也可以提高电池的使用寿命。


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    Title :

    Power distribution method, device and system of hybrid electric vehicle


    Additional title:

    一种混合动力汽车的功率分配方法、装置及系统


    Contributors:
    YIN JIANKUN (author) / MA YANHONG (author) / LI CHUAN (author) / LIU JIANKANG (author)

    Publication date :

    2020-05-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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