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Requirements Analysis of Operation Monitoring for Electric Vehicle in Transportation Industry

机译:运输业电动汽车运行监测需求分析

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Ensuring the operation efficiency and safety of electric vehicle is one of the main tasks of promoting the application of electric vehicle in transportation industry. Based on the operation characteristics of electric vehicle in transportation industry, the requirements of operation monitoring for electric vehicle were analyzed in this paper. Firstly, the operation processes of electric bus under typical urban conditions were simulated by the software of Advisor, and the potential faults of the battery pack during vehicle operation were demonstrated. Secondly, the peak power capability and driving range of electric bus under different conditions were studied by bench test and simulation software, and the effects of the state of charge (SOC) and temperature of battery pack on bus's operation capability were analyzed. Lastly, the aging characteristics of battery were researched by accelerated aging test, and the impacts of the battery aging on its ohmic resistance and available capacity were analyzed. The analysis results indicate that the change amplitude and frequency of the charging/discharging current of battery are drastic under typical urban driving conditions, which can easily lead to the battery risks such as over charge, over-discharge, and thermal runaway; both of the SOC and temperature of battery have obvious effect on the peak power capability and driving range of electric bus, and these two parameters can decline by about 50% when the battery temperature decreased from 20 to 0 °C; the loss of available capacity is mainly caused by the increase of ohmic resistance when the battery is aged, and the average loss rate of available capacity can be about 30-50% after one year of vehicle operation.
机译:保证了运行效率和电动车的安全性是促进电动车在交通行业的应用程序的主要任务之一。基于对交通运输行业的电动车辆的运行特性,运行监测电动汽车的要求在此进行了分析。首先,电动客车的典型城市条件下的操作流程是由顾问的软件仿真,该电池组的车辆运行期间潜在故障进行了论证。其次,在不同条件下的峰值功率能力和电总线的驱动范围被台架试验和仿真软件,和充电率(SOC)和电池组的温度对总线的操作能力状态的影响的研究进行了分析。最后,电池的老化特性通过加速老化试验研究,并且电池老化其欧姆电阻和可用容量的影响进行了分析。分析结果表明,在充电的变化幅度和频率/电池的放电电流是典型的城市驾驶条件下,它可以很容易导致电池下剧烈如过充电,过放电,和热失控的风险,例如;两个SOC和电池的温度对峰值功率能力明显的效果和电总线的驱动范围内,并且这两个参数可以由约50%,当电池温度从20下降到0℃下降;可用容量的损失主要是由欧姆电阻的增大,当电池老化,并且可用容量的平均损失率可以在车辆运行一年后为约30-50%。

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