The State of Charge Estimation of Lithium-Ion Batteries Based on a Proportional-Integral Observer
The State of Charge Estimation of Lithium-Ion Batteries Based on a Proportional-Integral Observer
复制标题
DOI：
10.1109/tvt.2013.2287375
复制
发表时间：
2014-05-01
影响因子：
6.8
通讯作者：
Li, Siqi
中科院分区：
文献类型：
--
作者：
Xu, Jun;Mi, Chunting Chris;Li, Siqi
随着电动汽车的发展，锂离子电池的荷电状态（SOC）估计变得越来越重要。在分析了几种常用的基于模型的SOC估计方法的基础上，提出了基于比例积分（PI）观测器的锂离子电池SOC估计方法。分析了所提出的PI观测器的结构，并证明了该估计方法在模型误差下的收敛性。为了证明所提出的PI观测器的优越性和补偿性能，简单结构的RC电池模型被用来建模的锂离子电池。为了验证所提出的基于PI的SOC估计方法的结果，实验电池测试台架的建立。在验证中，城市测功机驾驶时间表（UDDS）的驱动周期，并发现基于PI的SOC估计结果与参考SOC一致，一般在2%的误差范围内的已知和未知的初始SOC的情况下。
With the development of electric drive vehicles (EDVs), the state-of-charge (SOC) estimation for lithium-ion (Li-ion) batteries has become increasingly more important. Based on the analysis of some of the most popular model-based SOC estimation methods, the proportional-integral (PI) observer is proposed to estimate the SOC of lithium-ion batteries in EDVs. The structure of the proposed PI observer is analyzed, and the convergence of the estimation method with model errors is verified. To demonstrate the superiority and compensation properties of the proposed PI observer, the simple-structure RC battery model is utilized to model the Li-ion battery. To validate the results of the proposed PI-based SOC estimation method, the experimental battery test bench is established. In the validation, the urban dynamometer driving schedule (UDDS) drive cycle is utilized, and the PI-based SOC estimation results are found to agree with the reference SOC, generally within the 2% error band for both the known and unknown initial SOC cases.