CAJ | 학술논문

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。
채집료일관45Ah린산철리전지특성수거，분별재대유남화PNGV량충실용전로모형중추도건립료z역하전지전압、전류，이급모형삼수간적수학관계。채용최소이승법다원선성회귀이론，재Matlab배경하대모형삼수진행료고산，득도량충모형재25℃온도하적삼수고산결과，병대모형정도진행료험증，설계료괄용우량충전지모형적리전지SOC고산보취，근거방진득도적리전지SOC고산정황분석득도PNGV모형정도경고，경괄합용우실제전지건모계통중。
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.