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An acausal Li-ion battery pack model for automotive applications
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Uddin, Kotub, Picarelli, Alessandro, Lyness, Christopher , Taylor, Nigel and Marco, James (2014) An acausal Li-ion battery pack model for automotive applications. Energies, Volume 7 (Number 9). pp. 5675-5700. doi:10.3390/en7095675 ISSN 1996-1073.
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Abstract
In this work, a novel acausal and reconfigurable battery pack model is presented. The model structure adopted for the battery cell is based on an equivalent circuit representation. The circuit elements are modified to take account of both hysteresis and diffusion limitation. The latter is known to be a nonlinear function of large operating currents or long operating times. It is shown that the integration of a current dependent time constant within the cell model better emulates the solid diffusional dynamics of lithium intercalation into the active material under large electrical loads. The advantages of an acausal modeling approach, when scaling-up individual cell models into a complete battery system are also presented. Particular consideration is given to emulating the impact of cell to cell variations on pack performance. Using statistical analysis of battery tests, cell model parameter variations are characterized and quantified. The cell and scaled-up pack model are parameterized for a number of commercially available cell formats, energy capacities and chemistries. The new models are validated using transient, real-world, electrical data measured from an electric vehicle (EV) operating within an urban environment.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
Library of Congress Subject Headings (LCSH): | Lithium ion batteries -- Mathematical models, Lithium ion batteries -- Design and construction | ||||||||
Journal or Publication Title: | Energies | ||||||||
Publisher: | M.D.P.I.A.G. | ||||||||
ISSN: | 1996-1073 | ||||||||
Official Date: | 28 August 2014 | ||||||||
Dates: |
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Volume: | Volume 7 | ||||||||
Number: | Number 9 | ||||||||
Page Range: | pp. 5675-5700 | ||||||||
DOI: | 10.3390/en7095675 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 28 December 2015 | ||||||||
Date of first compliant Open Access: | 28 December 2015 | ||||||||
Funder: | Technology Strategy Board (Great Britain) |
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