摘要
续驶里程是当下关于纯电动汽车的热门话题,无论是标称续驶里程,还是使用过程中表显剩余续驶里程,二者的准确性都是人们关注的焦点。在现有技术条件下,着力提高剩余续驶里程估算值的准确性,开发具有广泛实用性的估算算法,是缓解用户续驶里程焦虑,推动电动汽车普及的有效手段。为此基于平均能耗提出了一种适用于纯电动汽车的续驶里程估算算法。通过累积计算车辆能耗与里程,按时间周期更新方式对车辆平均能耗进行了估算,并综合考虑上电起步、辅机开闭、低电量运行时的车辆状态,实时计算了续驶里程。在车辆上电起步阶段引入载荷状态判断,依据车辆起步时能量变化识别出载荷情况,匹配了相应的平均能耗初值。在车辆行驶过程中,顾及辅机能耗对续驶里程的影响,辅机开闭瞬间及时向驾乘人员反馈了剩余续驶里程变化情况。考虑电池低电量状态SOC误差较大,采用末端SOC剩余能量修正了策略计算可用剩余能量。通过离线仿真和实车试验进行了算法的功能及准确性验证。在构建的西安地区物流车典型行驶工况下开展了试验。结果表明:对于某型轻型纯电动厢式物流车,空载工况下续驶里程估算初值与实际值之间绝对误差为10 km,全程平均绝对误差为9.9 km;满载工况估算初值误差为9 km,全程平均误差为5.3 km。
Driving range is currently a hot topic about battery electric vehicles.Whether it is the nominal driving range or the remaining driving range displayed during use,the accuracy of both is the focus of attention.Under the existing technical conditions,focusing on improving the accuracy of the remaining driving range estimation value and developing an estimation algorithm with a wide range of practicability is an effective means to alleviate users’ anxiety about driving range and promote the popularization of electric vehicles.Therefore,based on the average energy consumption,a driving range estimation algorithm suitable for battery electric vehicles is proposed.Through cumulative calculating vehicle energy consumption and mileage,the average vehicle energy consumption is estimated according to the time cycle update mode,and the driving range is calculated in real time by comprehensively considering the vehicle status during power-on start,auxiliary engine opening and closing and low-power operation.During the vehicle power-on starting stage,by introducing the load state judgment,the load situation is identified according to the energy change when vehicle starts,and the corresponding initial average energy consumption value is matched.In the process of vehicle driving,considering the influence of auxiliary energy consumption on driving range,the change of remaining driving range is fed back to the driver and passengers in time at the moment of auxiliary opening and closing.Considering the large SOC error in low battery state,the available residual energy is calculated by using the end SOC residual energy correction strategy.The function and accuracy of the algorithm are verified by off-line simulation and real vehicle test.The test is carried out under the typical driving conditions of logistics vehicles in Xi’an.The result shows that(1)for a type of light-duty battery electric logistics van,electric truck,the absolute error between the estimated initial value and the actual value of the driving range under no-l
作者
舒航
史强
袁凯
王鹏翔
王芸芳
SHU Hang;SHI Qiang;YUAN Kai;WANG Peng-xiang;WANG Yun-fang(Shaanxi Automobile Holding Group Co.,Ltd.,Xi’an Shaanxi 710200,China)
出处
《公路交通科技》
CAS
CSCD
北大核心
2022年第2期174-182,共9页
Journal of Highway and Transportation Research and Development
关键词
汽车工程
续驶里程
平均能耗
载荷判断
辅机能耗
末端SOC修正
automobile engineering
driving range
average energy consumption
load state judgment
auxiliary energy consumption
terminal SOC correction
