The invention relates to a hybrid vehicle online energy management method based on optimal energy flow efficiency. Comprising the following steps: (1) establishing an offline energy management strategy; (11) discretizing the working area of the hybrid vehicle, and respectively calculating the required torques and speeds of the vehicle during linear driving and steering driving; (12) solving power flow efficiency in pure electric, braking and hybrid power modes by adopting different methods; (13) calculating corrected power flow efficiency of a pure electric mode and a hybrid power mode based on a power flow efficiency correction method of SOC analysis; (14) making a mode switching strategy; (2) based on an offline energy management strategy, a BP neural network is adopted to obtain a fitting function which can be directly called online; and the online energy management strategy determines a vehicle operation mode at the current moment according to the input information. According to the method, high-efficiency operation of the system can be kept, the smoothness of mode switching is ensured, meanwhile, the fitting operation speed is high, and online application of an energy management strategy is facilitated.

    本发明为一种基于能量流效率最优的混合动力车辆在线能量管理方法。包括如下步骤:(1)建立离线能量管理策略;(11)混合动力车辆的工作区域离散化,分别计算车辆直线行驶与转向行驶需求转矩与速度;(12)采用不同的方法求解纯电动、制动及混合动力模式下的功率流效率;(13)基于SOC分析的功率流效率修正方法,计算纯电动和混合动力模式的修正功率流效率;(14)制定模式切换策略;(2)基于离线能量管理策略,采用BP神经网络获得可在线直接调用的拟合函数;在线能量管理策略根据输入的信息确定当前时刻车辆运行模式。本发明既能保持系统的高效率运行,确保模式切换的平顺性,同时拟合运算速度快,有利于能量管理策略的在线应用。


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    Title :

    Hybrid vehicle online energy management method based on optimal energy flow efficiency


    Additional title:

    基于能量流效率最优的混合动力车辆在线能量管理方法


    Contributors:
    PI DAWEI (author) / LI XIAN (author) / LIU ZHIWEI (author) / LI GUANGDA (author) / WANG HONGLIANG (author) / WANG ERLIE (author) / WANG XIA (author) / SUN XIAOWANG (author) / WANG XIANHUI (author)

    Publication date :

    2024-01-30


    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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