摘要
采集了一款45Ah磷酸铁锂电池特性数据,分别在戴维南和PNGV两种实用电路模型中推导建立了z域下电池电压、电流,以及模型参数间的数学关系。采用最小二乘法多元线性回归理论,在Matlab环境下对模型参数进行了估算,得到两种模型在25℃温度下的参数估算结果,并对模型精度进行了验证,设计了适用于两种电池模型的锂电池SOC估算步骤,根据仿真得到的锂电池SOC估算情况分析得到PNGV模型精度更高,更适合用于实际电池建模系统中。
Data of 45Ah LiFePO4 Li-ion battery characteristics was collected and analyzed.The mathematical relationship between battery voltage, current and model parameters under the z domain was established respectively in the Thevenin and PNGV model, which were two kinds of practical circuits.The theory of least square method for the multivariate linear regression was used to estimate parameters of the models in the MATLAB environment.Parameters estimation results of the two models at 25℃temperature were obtained.Finally, the model accuracy was verified; and steps about two models of lithium battery suitable for SOC estimation were designed.The simulation of lithium battery SOC estimation shows that PNGV model accuracy is higher, more suitable for the actual battery modeling system.
出处
《武汉理工大学学报（信息与管理工程版）》
CAS
2015年第2期179-182,共4页
Journal of Wuhan University of Technology：Information & Management Engineering
基金
国家自然科学基金资助项目(51107092/E070602)
湖北省科技攻关计划基金资助项目(2011FAA009)
作者简介
张东华（1971－），男，湖北武汉人，武汉理工大学信息工程学院博士研究生．
