锂离子电池系统建模仿真

Systematically Modeling of Lithium Ion Batteries

动力电池测试是动力电池研究的基础,而建立和选择合适准确的电池模型对于电池管理系统开发具有重要意义.为了解决电动汽车仿真时电池模型选取的问题,分别系统的建立了Thevenin模型,Gassing模型以及AVL电池模型,其中,Thevenin模型和AVL电池模型实质上分别为一阶等效电路模型和三阶等效电路模型,而Gassing模型是一种半机理半经验模型.三种模型在非极限工况下,都具有较高的精度,Thevenin模型和AVL电池能够更加准确地描述电池极化环节,AVL电池模型和Gassing模型在剧烈变化工况下误差很小,而Gassing模型能够很好地描述电池在极限工况下的动态特性,且可以反映出温度与内阻的动态变化.

Because of its high energy density , zero pollution and many other performance characteristics , Lithium batteries are gradually concerned .As a result , to create and select the proper model is the foundation for any further study conducted on lithium battery .To figure out how to select the proper battery model for electric vehicle simulation , this paper systematically established 3 typical battery models：Thevenin model , Gassing mod-el and AVL battery model .All the models have high accuracy in sub -critical condition and the error of AVL battery model is the least .Gassing model can not only describe the dynamical property of the sub -critical situa-tion but also the critical situation .Besides, the relationship between resistance and temperature can be described in Gassing model .