The invention discloses an electric vehicle braking energy recovery method based on driving style recognition. The method comprises the steps that an ISG motor model, a power battery model and a CVT efficiency model are constructed; feature parameters are selected based on an RReliefF algorithm; four stages are divided according to the sequence of electric quantity decline, and at least one RReliefF algorithm is carried out in each stage; an ISG motor model, a power battery model, a CVT efficiency model and a RReliefF algorithm are used for constructing the ISG motor model, the relationship among motor system efficiency, torque and rotating speed is obtained by adopting a spline interpolation method through motor efficiency experimental data, the maximum torque of the ISG motor at each rotating speed obtained through an experiment is used, interpolation fitting is carried out to obtain the external characteristics of the ISG motor, and the external characteristics of the ISG motor are obtained through the external characteristics of the power battery model, the CVT efficiency model and the RReliefF algorithm. And the maximum power of the ISG motor is calculated according to the rotating speed and the corresponding maximum torque. Based on driving style recognition, changes of driving styles under different electric quantity stages are considered, so that three typical braking force distribution strategies are matched at different electric quantity stages, and the braking capacity of the electric vehicle is recovered as far as possible.
本发明公开一种基于驾驶风格识别的电动汽车制动能量回收方法,包括构建ISG电机模型、动力电池模型以及CVT效率模型;基于RReliefF算法选择特征参数;按照电量递减的顺序划分四个阶段,并于每个阶段分别进行至少一次RReliefF算法;将ISG电机模型、动力电池模型、CVT效率模型、RReliefF算法,构建ISG电机模型通过电机效率实验数据,采用样条插值方法得到电机系统效率、转矩与转速的关系,利用实验所得ISG电机每个转速下的最大转矩,再进行插值拟合得到ISG电机的外特性,再根据转速和其对应的最大转矩计算得到ISG电机的最大功率。本发明能够基于驾驶风格识别,考虑不同电量阶段下驾驶风格的变化,以便在不同电量阶段搭配三种典型制动力分配策略使电动汽车制动能力尽可能回收。
Electric vehicle braking energy recovery method based on driving style recognition
一种基于驾驶风格识别的电动汽车制动能量回收方法
2024-05-28
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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