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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

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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
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TL Motor vehicles. Aeronautics. Astronautics
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:
DateEvent
August 2016Published
23 May 2016Available
4 May 2016Accepted
4 November 2015Submitted
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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