三阶扩展GNL电池模型的研究

Research on three level expanded GNL cell module

电动汽车中电池管理系统(BMS)是决定电池寿命和车辆安全的关键技术;针对如何提高BMS对电池状态估算的准确性,采用MATLAB/simulink对电池的化学特性进行抽象,得到可以用数学表达式进行计算的物理模型,通过hppc试验,将测试数据导入simulink模型,利用simulink强大的计算能力,得到模型中各个关键参数值。将试验数据导入创建的模型和实际试验数据进行对比,得出创建的模型几乎和实际电池的充放电特性完全一致的结论,因此可以用此模型模拟电池实际的放电过程。

Battery management system （BMS） in electric vehicles is the key technology to determine battery life and vehicle safety. In order to improve the accuracy of BMS estimation for battery status, MATLAB/Simulink is used to abstract the chemical properties of batteries. This gives a physical model that can be calculated using mathematical expressions. Through the HPPC test, the test data is introduced into the Simulink model, and the key parameters in the model are obtained by using the powerful computing power of Simulink. By comparing the experimental data with the experimental data, it is concluded that the established model is almost the same with the charging and discharging characteristics of the actual battery. Therefore, this model can be applied to simulate the actual discharge process of the battery.