集中式电动汽车电池管理系统设计

电动汽车作为新能源汽车的一种,其动力电池的性能是关系到电动汽车推广应用的重要因素。在电动汽车的实际运行中,需要对电池电压、电流、温度等信号实时采集以及对电池内部参数在线估算。为了实现电池组的在线监测和管理,设计了一种采用微处理器做主控制模块的电池管理系统。该系统采用集中式的管理模式对汽车电池组进行测试和分析,设计完成系统控制、信息采集和数据通讯,工作环境抗干扰措施等功能,实现了一种基于双卡尔曼滤波算法的电池荷电状态(SOC)的估算,并利用Lab VIEW实现上位机系统的界面设计。在实际测试中,采用该系统同时对192节锂电池进行监控,实现了电压、环境温度等信息的在线测量,电池荷电状态(SOC)的估算误差不超过1%。

Design of centralized battery management system for electrical vehicle

The performance of the power battery is an important factor related to the popularization and application of the electric vehicles as a kind of new energy vehicle. In the practical operation of the electric vehicle, the battery voltage, current, temperature signal need to be real time acquired and the battery internal parameter needs to be online estimated. In order to realize the battery online monitoring and management, a kind of battery management system adopting microcontroller as its main control module is designed. The centralized management mode is used in testing and analysis of batteries in the system. The function of system control, information collection and data communication, interference suppression for complex work environment are designed, one estimate method based on double Kalman filtering algorithm is implemented in the battery state of charged (SOC), and the LabVIEW is used in interface design of the system. In practical testing, the 192 lithium batteries are monitored at the same time, the voltage and temperature are measured on line, and the error of SOC calculation is less than 1%.