基于能量流分析的纯电动汽车电耗优化研究

能量流分析研究是了解车辆能量利用情况和优化车辆经济性的有效方式,针对于某款纯电动汽车电量消耗偏大的问题,设计了纯电动汽车能量流测试方案,完成了主要部件性能对标测试分析;通过理论分析建立了影响电量消耗的数学模型和基于价值因子的优化参数选取方法;基于CRUISE电耗仿真分析模型,分别从电驱动系统效率提升、滚阻优化、提升制动能量回收率以及优化附件控制策略等方面进行了定量的电耗优化分析。实车应用测试结果表明:优化后的整车能量流效率得到明显改善,DC/DC充电效率提升到90%,制动能量回收率提升到18%以上,NEDC工况下整车电耗降低了13.78%,进一步改善了纯电动汽车能量利用的经济性。

Research on Optimization of Power Consumption of Pure Electric Vehicle Based on Energy Flow Analysis

Research on energy flow analysis is an effective way to understand vehicle energy utilization and optimize vehicle economy.For the problem of excessive power consumption of a pure electric vehicle,a pure elec?tric vehicle energy flow test scheme is designed,and the performance benchmarking test analysis of main compo?nents is completed.Through theoretical analysis,the mathematical model affecting power consumption and the method of selecting optimal parameters based on value factor are established.Based on CRUISE power consumption simulation analysis model,quantitative power consumption optimization analysis is carried out from the aspects of electric drive system efficiency improvement,rolling resistance optimization,braking energy recovery rate improve?ment and accessory control strategy optimization.The improved real vehicle test results show that the energy flow ef?ficiency of the whole vehicle has been improved significantly,with the DC/DC charging efficiency increased to 90%,the braking energy recovery rate increased to more than 18%and the vehicle power consumption reduced by 13.78%under NEDC conditions,which further improves the energy utilization economy of pure electric vehicles.