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Adaptive Kalman filter based state of charge estimation algorithm for lithium-ion battery |
Zheng Hong (郑宏), Liu Xu (刘煦), Wei Min (魏旻) |
University of Electronic Science and Technology of China, Chengdu 611731, China |
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Abstract In order to improve the accuracy of the battery state of charge (SOC) estimation, in this paper we take a lithium-ion battery as an example to study the adaptive Kalman filter based SOC estimation algorithm. Firstly, the second-order battery system model is introduced. Meanwhile, the temperature and charge rate are introduced into the model. Then, the temperature and the charge rate are adopted to estimate the battery SOC, with the help of the parameters of an adaptive Kalman filter based estimation algorithm model. Afterwards, it is verified by the numerical simulation that in the ideal case, the accuracy of SOC estimation can be enhanced by adding two elements, namely, the temperature and charge rate. Finally, the actual road conditions are simulated with ADVISOR, and the simulation results show that the proposed method improves the accuracy of battery SOC estimation under actual road conditions. Thus, its application scope in engineering is greatly expanded.
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Received: 31 July 2014
Revised: 30 March 2015
Accepted manuscript online:
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PACS:
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88.85.Hj
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(Electric vehicles (EVs))
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82.47.Aa
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(Lithium-ion batteries)
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07.05.Mh
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(Neural networks, fuzzy logic, artificial intelligence)
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07.05.Tp
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(Computer modeling and simulation)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61004048 and 61201010). |
Corresponding Authors:
Zheng Hong
E-mail: macrozheng@uestc.edu.cn
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Cite this article:
Zheng Hong (郑宏), Liu Xu (刘煦), Wei Min (魏旻) Adaptive Kalman filter based state of charge estimation algorithm for lithium-ion battery 2015 Chin. Phys. B 24 098801
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