复合电源电动汽车能量管理策略研究

Research on intelligent energy management strategy of hybrid electric vehicle

为了合理分配复合电源电动汽车的能量输出,针对动力电池-超级电容复合电源系统研究整车能量管理策略。首先基于AVL-Cruise软件搭建复合电源电动汽车仿真模型,其次根据复合电源系统特性,设计以动力电池SOC、超级电容SOC、系统需求功率为输入,比例因子K为输出的模糊逻辑控制器,对超级电容和动力电池进行功率流分配。仿真结果表明,在2400 s的NEDC循环工况下,复合电源系统SOC值与单一电源相比提高了12.5%,动力电池平均放电电流降低了约20 A,动力电池峰值放电电流降低了约125 A。

In order to reasonably distribute the energy output of hybrid electric vehicles,the vehicle energy management strategy is studied for the power battery-supercapacitor hybrid power system.Firstly,a composite power electric vehicle simulation model based on AVL-Cruise software is established.Secondly,according to the characteristics of the composite power system,a fuzzy logic controller is designed with power battery SOC,super capacitor SOC,system demand power as input,and scale factor K as output,which distributes power flow between supercapacitor and power battery.The simulation results show that under the NEDC cycle of 2400 s,the SOC value of the composite power supply system is increased by 12.5%compared with the single power supply,the average discharge current of the power battery is reduced by about 20 A,and the peak discharge current of the power battery is reduced by about 125 A.