新能源汽车电池管理系统设计

Development of the BMS in New Energy Vehicle

目前电池管理系统仍然存在很多问题，比如对电池单体电压监测精度不够高，对电池剩余电量（SOC）估计不够准确。文中利用凌力尔特公司推出的电池监控芯片LTC6804，实现对电池状态的监控，并进一步对电池进行动态均衡和电池参数模型的在线辨识，利用辨识模型参数值，可以为电池剩余电量的估算提供相对精确地数据。

At present, the battery management system still exist many problems, such as the voltage monitoring accuracy of the single battery is not high enough, the state of charge （SOC） estimation of battery is not accurate enough. With a battery monitoring chip LTC6804 from Linear Technology Corporation,the control of the status of the battery, and further dynamic balance to the batteries and identify online to the battery model parameters are given. With the identified results of model parameter,the more accurate data of SOC can be estimated.