电动汽车电池管理系统和剩余容量计研究

目的研究和开发电动汽车电池管理系统，实现铅酸储能蓄电池的剩余容量计量技术。方法通过对电动汽车铅酸储能电池基本电化学特性分析，采用了以安时法－Ｐｅｕｋｅｒｔ公式－开路电压法为基本算法，进行电池管理系统的开发，同时考虑了温度、自放电、使用循环寿命等因素对铅酸电池剩余容量预测的影响。结果所开发的管理系统铅酸电池剩余容量静态充放电实验计量误差小于５％，提供给驾驶员一个较准确的剩余容量，并对电池组中每声池进行监测，对铅酸电池的过放电和过充电等非正常工作情况及时报警，实用性强。结论电动汽车电池管理系统可以有效延长电池的使用寿命，优化电池能量的利用，提高电动汽车的性能。

Battery Management System with State ofCharge Indicator for Electric Vehicles

Aim To research and develop a battery management system(BMS)with the state of charge(SOC)indicator for electric vehicles (EVs).Methods On the basis of analyzing the electro-chemical characteristics of lead-acid. battery, the state of charge indicator for lead-acid battery was developed by means of an algorithm based on combination of ampere-hour, Peukert's equation and open-voltage method with the compensation of temperature,aging,self- discharging,etc..Results The BMS based on this method can attain an accurate surplus capa- city whose error is less than 5% in static experiments.It is proved by experiments that the BMS is reliable and can give the driver an accurate surplus capacity,precisely monitor the individual battery modules as the same time,even detect and warn the problems early,and so on. Conclusion A BMS can make the energy of the storage batteries used efficiently, develop the batteries cycle life,and increase the driving distance of EVs.