河南理工大学学报（自然科学版）2024，Vol.43Issue(5)：127-132,6.DOI:10.16186/j.cnki.1673-9787.2022080023
基于HPPC-FFRLS的锂电池等效模型参数在线辨识
Online parameter identification of lithium battery equivalent circuit model based on HPPC-FFRLS
摘要
Abstract
Objectives In order to realize high-precision condition monitoring and analysis of lithium-ion power battery,Methods the study on the online identification of the parameters of the second-order RC equivalent circuit model of lithium-ion power battery was carried out.The second-order RC equivalent cir-cuit model of lithium-ion power battery was constructed.The open-circuit voltage method and the ampere-time integration algorithm were combined to evaluate the state of charge(SOC)of the battery.The offline pa-rameter identification of the equivalent circuit model was carried out through the experimental data of HPPC test.The offline identification results were taken as the initial value of the system state,and the recur-sive least squares algorithm with forgetting factor(FFRLS)was combined to carry out the online identifica-tion of the parameters of the second-order RC equivalent circuit model of the lithium-ion power battery.Simulink was used to build a simulation system of battery state monitoring and charge/discharge control,the model based on the online identification parameters was simulated and tested,and the experimental plat-form was built by using the programmable power supply and electronic load.Results Comparing the system simulation output of online parameter identification,offline parameter identification and experimental data,the results showed that:The simulation error of the model based on HPPC-FFRLS was reduced by 50%compared with that of the HPPC experimental method,the online identification strategy overcomed the influ-ences of ambient temperature,aging of the battery,and charge/discharge rate;The fluctuation of the system at the early stage of the simulation was reduced significantly,and the equivalent model system dynamic tracking had a better level,the robustness got better.Conclusions The online parameter identification of lithium battery equivalent circuit model based on HPPC-FFRLS ensured the effectiveness of the model pa-rameters,improved the model accuracy,and reduced the calculation.关键词
锂电池/二阶RC等效电路模型/HPPC测试/在线参数辨识/FFRLSKey words
lithium battery/second-order RC equivalent circuit model/HPPC testing/online parameter identi-fication/FFRLS分类
信息技术与安全科学引用本文复制引用
李长有,张颖,赵勇,高国富..基于HPPC-FFRLS的锂电池等效模型参数在线辨识[J].河南理工大学学报（自然科学版）,2024,43(5):127-132,6.基金项目
国家自然科学基金资助项目(52275419) （52275419）
河南省科技攻关项目(222102240022) （222102240022）
河南理工大学自然科学基金资助项目(B2021-38) （B2021-38）
