基于长尺度测量法的纯电动客车暗电流系统性分析与验证

Systematic Analysis and Verification of Dark Current for Pure Electric Bus Based on Long Scale Measurement Method

为了准确评估纯电动客车的暗电流,避免车辆因蓄电池电量不足无法起动,选取2款纯电动客车,对其车载电气设备的供电模式及整车暗电流进行系统性分析,在总结常规暗电流测量方法的基础上提出长尺度测量法,采用电功率测试仪及测量模块设计检测方案记录暗电流并完成实车测试。理论分析与试验数据对比结果表明:长尺度测量法能够准确评估纯电动客车暗电流并将其控制在合理范围内,进而计算车辆的停运时长。

In order to accurately evaluate the dark current of pure electric bus and avoid vehicle failure to start due to insufficient battery power,2 models of pure electric buses were selected,the power supply mode and vehicle dark current of their on-board electrical equipment were analyzed systematically.At the same time,on the basis of summarizing the conventional dark current measurement methods,the long-scale measurement method was proposed,using the electric power tester and measurement module to build a detection scheme to record the dark current and complete the real vehicle test.The results of theoretical analysis and experimental data comparison show that the method based on long scale measurement can accurately evaluate the dark current value of pure electric bus and control it in a reasonable range,then guide the calculation of vehicle outage time.