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Design and use of multisine signals for Li-ion battery equivalent circuit modelling. Part 2 : model estimation
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Widanage, Widanalage Dhammika, Barai, Anup, Chouchelamane, G.H., Uddin, Kotub, McGordon, Andrew, Marco, James and Jennings, P. A. (Paul A.) (2016) Design and use of multisine signals for Li-ion battery equivalent circuit modelling. Part 2 : model estimation. Journal of Power Sources, 324 . pp. 61-69. doi:10.1016/j.jpowsour.2016.05.014
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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2016.05.014
Abstract
An Equivalent Circuit Model (ECM) of a lithium ion (Li-ion) battery is an empirical, linear dynamic model and the bandwidth of the input current signal and level of non-linearity in the voltage response are important for the model’s validity. An ECM is, however, generally parametrised with a pulse current signal, which is low in signal bandwidth (Part 1) and any non-linear dependence of the voltage on the current due to transport limitations is ignored. This paper presents a general modelling methodology which utilises the higher bandwidth and number of signal levels of a pulse-multisine signal to estimate the battery dynamics and non-linear characteristics without the need of a 3D look-up table for the model parameters. In the proposed methodology a non-parametric estimate of the battery dynamics and non-linear characteristics are first obtained which assists in the model order selection, and to assess the level of non-linearity. The new model structure, termed as the Non-linear ECM (NL-ECM), gives a lower Root Mean Square (RMS) and peak error when compared to an ECM estimated using a pulse data set.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TL Motor vehicles. Aeronautics. Astronautics |
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| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||
| Library of Congress Subject Headings (LCSH): | Lithium ion batteries -- Mathematical models -- Research, Electric circuits, Equivalent | ||||||||||
| Journal or Publication Title: | Journal of Power Sources | ||||||||||
| Publisher: | Elsevier S.A. | ||||||||||
| ISSN: | 0378-7753 | ||||||||||
| Official Date: | August 2016 | ||||||||||
| Dates: |
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| Volume: | 324 | ||||||||||
| Page Range: | pp. 61-69 | ||||||||||
| DOI: | 10.1016/j.jpowsour.2016.05.014 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||
| Funder: | Innovate UK, Jaguar Cars Ltd, Tata Motors |
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