摘要
随着纯电动车的普及推广,大众对能量回收的概念有了更为清晰的了解。文章以某品牌纯电动MPV在NEDC循环工况下为例,阐述了理论可回收能量和实际可回收能量的差异及影响因素,并通过调整整车能量回收控制策略进行车辆实测,为纯电动汽车能量回收以及降能耗的控制策略提供参考。通过统计分析NEDC循环工况加速、匀速及减速阶段的典型工况数据特征,将NEDC循环工况分解成36个运转次序,同时根据汽车的力学公式及电机电控效率,计算单个循环工况理论上减速工况所产生的可回收电量占工况所消耗总能量的18.6%。通过调整整车能量回收控制策略,调整车辆能量回收时产生的减速度接近NEDC循环工况减速度,同时将该车置于环境舱内转鼓按NEDC循环工况分别测试该车在无能量回收及有能量回收的续驶里程及能量消耗量,测试结果表明,车辆续驶里程由281.3 km增加至329.3 km,能量回收带来48 km的里程数增加,无能量回收车辆耗电量为44.4 kWh,百公里耗电量约为15.69 kWh,对应48 km电量为7.53 kWh,占无能量回收时总消耗电量的16.96%,已接近理论值。在电机电控等系统效率不变、车辆内阻不变的情况下,定义能量回收策略时通过调整车辆能量回收时产生的减速度接近NEDC循环工况减速度,可提升能量回收率。
With the popularization of pure electric vehicles,the public has a clearer understanding of the concept of energy recovery.Taking a brand of pure electric MPV under NEDC cycle as an example,this paper expounds the difference and influencing factors between theoretical recoverable energy and actual recoverable energy,and carries out vehicle measurement by adjusting the energy recovery control strategy of the whole vehicle,so as to provide reference for the control strategy of pure electric vehicle energy recovery and energy consumption reduction.Through statistical analysis of the data characteristics of typical working conditions with large acceleration,uniform speed and deceleration stages of NEDC cycle,the NEDC cycle is divided into 36 operation sequences.At the same time,according to the mechanical formula of the vehicle and the electric control efficiency of the motor,it is calculated that the recoverable electricity generated by the deceleration condition theoretically accounts for 18.6%of the total energy consumed under the condition.By adjusting the energy recovery control strategy of the whole vehicle,the deceleration generated during vehicle energy recovery is adjusted to be close to the deceleration under NEDC cycle conditions.At the same time,the vehicle is placed in the environmental chamber.The driving range and energy consumption of the vehicle without energy recovery and with energy recovery are tested respectively according to NEDC cycle conditions.The test results show that the driving range of the vehicle is increased from 281.3 km to 329.3 km,energy recovery will increase the mileage of 48 km.The power consumption of vehicles without energy recovery is 44.4 kWh,the power consumption of 100km is about 15.69 kWh,and the corresponding power consumption of 48 km is 7.53 kWh,accounting for 16.96%of the total power consumption without energy recovery,which is close to the theoretical value.Under the condition that the efficiency of motor electronic control and other systems remains unchanged and the
作者
李日业
LI Riye(Fujian Newlongma Automotive Co.,Ltd.,Fujian Longyan 364101)
出处
《汽车实用技术》
2021年第24期1-4,共4页
Automobile Applied Technology
