热力发电2025，Vol.54Issue(3)：51-58,8.DOI:10.19666/j.rlfd.202407188
一种变增益自适应滑模观测器在锂电池SOC估算中的应用
A variable gain adaptive sliding mode observer for SOC estimation in lithium batteries
摘要
Abstract
The dynamic model of lithium-ion batteries has typical nonlinearities and uncertainties,the estimation accuracy of the state of charge(SOC)of the lithium-ion batteries directly affects the effect of the monitoring and controlling in battery management system(BMS).To enhance the estimation accuracy of the SOC of the lithium-ion batteries,an adaptive sliding mode observer,which based on a variable gain for lithium-ion battery SOC estimating model is proposed.By using the robustness of the sliding mode observer and based on the second-order RC equivalent circuit model,an integral term is introduced in conventional sliding mode surface to improve the robustness on sliding mode surface,and a gradient descent rule is adopted to achieve gain adaptation to reduce the chattering of observer and improve prediction accuracy and robustness.Simultaneously,the stability of the proposed method is proved using Lyapunov theory.Finally,the proposed method is validated and compared with the sliding mode observe(SMO)method under dynamic stress test(DST)and Federal urban driving schedule(FUDS)conditions.The proposed method has less chattering in estimation with higher estimation accuracy and good robustness.关键词
荷电状态/滑模观测器/增益自适应Key words
state of charge/sliding mode observer/gain adaptive引用本文复制引用
孙坚,高超,毕宇豪..一种变增益自适应滑模观测器在锂电池SOC估算中的应用[J].热力发电,2025,54(3):51-58,8.基金项目
国家自然基金科学基金项目(52077120) （52077120）
宜昌科技研发项目(A201230215) National Natural Science Foundation of China(52077120) （A201230215）
Yichang Science and Technology R&D Project(A201230215) （A201230215）
