کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
13418516 | 1841454 | 2020 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An adaptive sigma-point Kalman filter with state equality constraints for online state-of-charge estimation of a Li(NiMnCo)O2/Carbon battery using a reduced-order electrochemical model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
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چکیده انگلیسی
A new SOC estimation method is proposed based on a reduced-order electrochemical model using an adaptive square-root sigma-point Kalman filter (ASR-SPKF) with equality state constraints. The constraints derived from the principle of charge conservation are introduced to improve the accuracy of both anode and cathode SOC estimations. Furthermore, the cathode SOC is estimated to represent the cell SOC for its fast convergence speed, which is due to the high magnitude of the cathode equilibrium potential. Approaches used to adaptively updating the covariance parameters of the filter based on the covariance matching method are also incorporated. As a result, the covariance matrix of process noise is adjusted automatically. Comparative studies of three nonlinear filters concerning estimation accuracy, error bounds, recovery time from an initial offset, and computational time revealed that the ASR-SPKF has the most outstanding performance. That is, 30% more accurate and 88% shorter the convergence time than the AEKF, and, computationally, 23% and 19% faster than the AEKF and ASPKF, respectively. Then, the proposed method was tested at different temperatures using a large-format lithium-ion battery with a nominal capacity of 42â¯Ah where the voltage and SOC error remained less than 22â¯mV and 2%, respectively. Finally, the proposed method was implemented in a battery-in-the-loop test station using a fast charging and a driving cycle profile, and the estimated voltage and SOC were compared with the experimental results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 258, 15 January 2020, 113925
Journal: Applied Energy - Volume 258, 15 January 2020, 113925
نویسندگان
Yalan Bi, Song-Yul Choe,