Methodology for Developing a Macro Finite Element Model of Lithium-Ion Pouch Cells for Predicting Mechanical Behaviour under Multiple Loading Conditions

Richard Beaumont, Iain Masters, Abhishek Das, Steve Lucas, Arunn Thanikachalam and David Williams
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Richard Beaumont: WMG, University of Warwick, Coventry CV4 7AL, UK
Iain Masters: WMG, University of Warwick, Coventry CV4 7AL, UK
Abhishek Das: WMG, University of Warwick, Coventry CV4 7AL, UK
Steve Lucas: WMG, University of Warwick, Coventry CV4 7AL, UK
Arunn Thanikachalam: WMG, University of Warwick, Coventry CV4 7AL, UK
David Williams: WMG, University of Warwick, Coventry CV4 7AL, UK

Energies, 2021, vol. 14, issue 7, 1-21

Abstract: To assist in light weighting of electric vehicles by improving the volumetric and gravimetric energy density and the structural performance of the battery pack, a modelling methodology based on a macro finite element model of a pouch cell has been developed. This model treats the core cell structure as a homogeneous orthotropic honeycomb block with the pouch material being defined as an orthotropic fabric with compressive stress elimination. The model considers five compression and bending load cases simultaneously and allows a level of element discretisation that is computationally efficient and appropriate for inclusion in full vehicle and sub-system simulations. The methodology is scalable in that it can be applied to a range of chemistries, external geometries and internal cell constructions. When considering stacks of cells, the model is predictive for both lateral compression and three-point bend, but further work is required to improve the confined compression response.

Keywords: pouch cell; quasi-static testing; finite element analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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