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A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter
An accurate state of charge (SOC) estimation in battery management systems (BMS) is of crucial importance to guarantee the safe and effective operation of automotive batteries. However, the BMS consistently suffers from inaccuracy of SOC estimation. Herein, we propose a SOC estimation approach with...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7952569/ https://www.ncbi.nlm.nih.gov/pubmed/33707575 http://dx.doi.org/10.1038/s41598-021-84729-1 |
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author | Yang, Shichun Zhou, Sida Hua, Yang Zhou, Xinan Liu, Xinhua Pan, Yuwei Ling, Heping Wu, Billy |
author_facet | Yang, Shichun Zhou, Sida Hua, Yang Zhou, Xinan Liu, Xinhua Pan, Yuwei Ling, Heping Wu, Billy |
author_sort | Yang, Shichun |
collection | PubMed |
description | An accurate state of charge (SOC) estimation in battery management systems (BMS) is of crucial importance to guarantee the safe and effective operation of automotive batteries. However, the BMS consistently suffers from inaccuracy of SOC estimation. Herein, we propose a SOC estimation approach with both high accuracy and robustness based on an improved extended Kalman filter (IEKF). An equivalent circuit model is established, and the simulated annealing-particle swarm optimization (SA-PSO) algorithm is used for offline parameter identification. Furthermore, improvements have been made with noise adaptation, a fading filter and a linear-nonlinear filtering based on the traditional EKF method, and rigorous mathematical proof has been carried out accordingly. To deal with model mismatch, online parameter identification is achieved by a dual Kalman filter. Finally, various experiments are performed to validate the proposed IEKF. Experimental results show that the IEKF algorithm can reduce the error to 2.94% under dynamic stress test conditions, and robustness analysis is verified with noise interference, hence demonstrating its practicability for extending to state estimation of battery packs applied in real-world operating conditions. |
format | Online Article Text |
id | pubmed-7952569 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-79525692021-03-12 A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter Yang, Shichun Zhou, Sida Hua, Yang Zhou, Xinan Liu, Xinhua Pan, Yuwei Ling, Heping Wu, Billy Sci Rep Article An accurate state of charge (SOC) estimation in battery management systems (BMS) is of crucial importance to guarantee the safe and effective operation of automotive batteries. However, the BMS consistently suffers from inaccuracy of SOC estimation. Herein, we propose a SOC estimation approach with both high accuracy and robustness based on an improved extended Kalman filter (IEKF). An equivalent circuit model is established, and the simulated annealing-particle swarm optimization (SA-PSO) algorithm is used for offline parameter identification. Furthermore, improvements have been made with noise adaptation, a fading filter and a linear-nonlinear filtering based on the traditional EKF method, and rigorous mathematical proof has been carried out accordingly. To deal with model mismatch, online parameter identification is achieved by a dual Kalman filter. Finally, various experiments are performed to validate the proposed IEKF. Experimental results show that the IEKF algorithm can reduce the error to 2.94% under dynamic stress test conditions, and robustness analysis is verified with noise interference, hence demonstrating its practicability for extending to state estimation of battery packs applied in real-world operating conditions. Nature Publishing Group UK 2021-03-11 /pmc/articles/PMC7952569/ /pubmed/33707575 http://dx.doi.org/10.1038/s41598-021-84729-1 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Yang, Shichun Zhou, Sida Hua, Yang Zhou, Xinan Liu, Xinhua Pan, Yuwei Ling, Heping Wu, Billy A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter |
title | A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter |
title_full | A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter |
title_fullStr | A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter |
title_full_unstemmed | A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter |
title_short | A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter |
title_sort | parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended kalman filter |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7952569/ https://www.ncbi.nlm.nih.gov/pubmed/33707575 http://dx.doi.org/10.1038/s41598-021-84729-1 |
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