Electro-chemo-mechanically coupled computational modelling of structural batteries
Journal article, 2020

Structural batteries are multifunctional composites that combine load-bearing capacity with electro-chemical energy storage capability. The laminated architecture is considered in this paper, whereby restriction is made to a so called half-cell in order to focus on the main characteristics and provide a computational tool for future parameter studies. A thermodynamically consistent modelling approach is exploited for the relevant electro-chemo-mechanical system. We consider effects of lithium insertion in the carbon fibres, leading to insertion strains, while assuming transverse isotropy. Further, stress-assisted ionic transport is accounted for in addition to standard diffusion and migration. The relevant space-variational problems that result from time discretisation are established and evaluated in some detail. The proposed model framework is applied to a generic/idealized material representation to demonstrate its functionality and the importance of accounting for the electro-chemo-mechanical coupling effects. As a proof of concept, the numerical studies reveal that it is vital to account for two-way coupling in order to predict the multifunctional (i.e. combined electro-chemo-mechanical) performance of structural batteries.

finite element analysis (FEA)

multiphysics modelling

electro-chemo-mechanical coupling

multifunctional composites

Li-ion based structural batteries

Author

David Carlstedt

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Kenneth Runesson

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Fredrik Larsson

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Johanna Xu

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Leif Asp

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Multifunctional Materials

Vol. 3 4 045002

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Damage Tolerance and Durability of Structural Power Composites

US Air Force Office of Strategic Research (AFOSR), 2017-09-30 -- 2020-09-29.

Areas of Advance

Transport

Energy

Materials Science

Subject Categories

Aerospace Engineering

Applied Mechanics

Composite Science and Engineering

DOI

10.1088/2399-7532/abc60d

More information

Latest update

1/5/2021 2