基于最低极限能耗的纯电动汽车能耗指标评价方法

Evaluation method of energy consumption index of pure electric vehicle based on minimum limit energy consumption

为确定理想条件下纯电动汽车能源效率和续驶里程的极限目标值,评价纯电动汽车能耗,提出了一种纯电动汽车能耗指标先进性判定方法。定义了4个全新参数:最低极限能耗、最大极限续驶里程、能源效率比和续驶里程比,提出了确定方法,推导了计算公式。分析了纯电动汽车在平坦路面上等速行驶和在新欧洲驾驶循环(NEDC)工况下的这些参数值。结果表明:最低极限能耗和最大极限续驶里程代表了在纯电动汽车动力系统无任何能源转换损失的理想条件下的最小电能消耗率和最长行驶距离;能源效率比和续驶里程比互为倒数,可用于评价纯电动汽车能源转换效率的优劣,其数值越接近于1,能源转换效率越高。

Determining the limit target value of energy efficiency and driving range under ideal conditions is of great significance to the evaluation and improvement of energy consumption of pure electric vehicles.A new evaluation method of advanced energy consumption index was given for pure electric vehicle,with defining the concept of four new parameters,such as minimum limit energy consumption,maximum limit driving range,energy efficiency ratio and driving range ratio.In addition,giving a method of determining the four parameters,deduces its formula and calculates values of these parameters under the flat road and the New Europe Driving Cycle(NEDC)test conditions.The results show that the minimum limit energy consumption and the maximum limit driving range represent the minimum energy consumption and the longest drive range under the ideal condition of pure electric vehicle power system without any energy conversion loss.Energy efficiency ratio and driving range ratio are reciprocal,can be used to evaluate the energy conversion efficiency of pure electric vehicles,the value of these two parameter closer1,the energy conversion efficiency of pure electric vehicle is higher.