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1、* 纯电动汽车能量回馈效率特性测试分析1 1 1 2 2 黄万友程勇曹红李闯张笑文(1. 山东大学能源与动力工程学院济南250061;2. 济南市电动汽车运营有限公司济南250014)摘要:进行高效的能量回馈,可有效延长纯电动车辆续驶里程,而能量回馈效率受到电动机转速、制动转矩、电池组荷电状态等因素的影响。利用电动汽车动力总成性能测试试验台,测试分析电动机转速、制动转矩、电池组荷电状态及电池组温度对能量回馈效率的影响规律;讨论电动机温度对能量回馈时最大制动转矩的限制;参考实车测试数据,设定了能量回馈效率特性研究工况范围,对不同电动机转速、制
2、动转矩及电池组荷电状态下的能量回馈效率进行测试;基于实测数据构建能量回馈效率预测模型,并通过台架试验验证了该模型的有效性。参考能量回馈效率模型开发控制策略,实车滑行能量回馈过程中,回收能量相对于原车控制策略提高了4.8%,这表明该模型可为高效能量回馈控制策略的制定提供参考依据。关键词:纯电动汽车能量回馈效率影响因素效率模型中图分类号:U469Test andAnalysis of ElectricVehicle’sEnergyFeedback Efficiency11122HUANG Wanyou CHENG Yong CAO Hong L
3、IChuang ZHANG Xiaowen (1.Collegeof Energy & Power Engineering, Shandong University, Jinan 250061;2. JinanElectric Vehicle OperationCo., Ltd, Jinan 250014)Abstract:Byimprovingtheefficiencyofenergyfeedback,electricvehicle’s endurancemileage could beprolonged efficiently.The
4、efficiencyis affected bymotorspeed,brake torque,batterypack’sstateofcharge (SOC)and some otherfactors.Therelationship ofenergyfeedback efficiencyand motorspeed,brake torque,batterypack’sSOC,batterypack’s temperatureis studiedbymeansofEVpowertrain’sperformance testingbench.
5、The restriction ofmotor’s temperaturetothemaximumbraketorquesettingisdiscussed.Workingcondition range is setaccordingtothe realresults fromanEV.And in this range,the energyfeedback efficiencyis measured underdifferentmotorspeeds, brake torques,andbatterypack’s SOCs. Apredi
6、ction modelofenergyfeedback efficiencyis developed based onmeasureddata,andthemodel’s validity is verified bytestingresults. Energyfeedbackcontrolstrategyforcoastingprocess isdevelopedaccordingtothemodel,andrealvehicletestingresultshowenergyfeedback efficiencyimprovementof
7、thenewstrategy overtheoriginalone,which suggests thatthis efficiencymodelcan be used tooptimize thecontrolstrategyatcoastingcondition.Keywords:Electricvehicles Energyfeedback efficiency Influencingfactors Efficiencymodel转矩、电池组SOC及电池组温度对能量回馈效率特0 前言性的影响;在试验台上对能量回馈效率特性进行了试验分析
8、;基于实测数据,构建了能量回馈效率模通过能量回馈,可有效回收车辆滑行和制动时型,并通过试验验证了模型的有效性。[1]的动能,使车辆续驶里程增加10%~30%。车辆能量回馈效率受驱