动力锂电池SOC估计的建模与仿真  

Modeling and Simulation of Power Lithium-ion Battery SOC

作　　者：侯恩广[1] 乔昕[1] 刘广敏[1] 李杨[1] 

机构地区：[1]山东省科学院自动化研究所,山东济南250014

出　　处：《计算机仿真》2014年第2期193-196,共4页Computer Simulation

基　　金：国家02专项2011年项目(2011ZX02504-007);"十二五"国家863电动汽车重大专项(2011AA11A128)

摘　　要：在电动汽车动力电池性能优化设计问题的研究中,为了提高整车性能和安全性,需要准确估计动力锂电池的荷电状态(SOC),由于动力锂电池的非线性特性,建立合理有效的电池模型就成为SOC估计的关键技术和难题。首先分析锂离子电池的工作原理,然后提出了建立基于RC等效电路的电池模型,推导并建立RC等效电路的模型方程,通过拉普拉斯变换和大量充放电实验数据,辨识出数学模型的参数,最后应用扩展卡尔曼滤波算法对动力锂电池SOC状态进行仿真估计。在Matlab上仿真验证结果表明,采用RC等效电路的电池模型准确性高、计算量少。In order to improve vehicle performance and safety, the accurate estimation of power lithium battery state of charge （SOC） is needed, and the key technical challenge is to establish a reasonable and effective battery model because of nonlinear characteristic of power lithium - ion battery. In this paper, we analyzed the works of power lithium - ion battery, presented a battery model based on RC equivalent circuit, deduced and established the equations of RC equivalent circuit, and identified parameters of the mathematical model by experimental data and laplace. At last, we simulated the estimation for the SOC of power lithium - ion battery based on EKF. The simulation results show better battery model accuracy and less computation.

关 键 词：动力锂电池 电池剩余电量 建模 拉普拉斯变换 仿真 

分 类 号：N945.12[自然科学总论—系统科学]