Thermal and diffusion induced stresses in a structural battery under galvanostatic cycling
Journal article, 2019

When charging or discharging a structural battery composite heat will be generated and the active electrode materials will expand or shrink, inducing internal stresses within the material. These stresses may cause mechanical and/or electrical failure. It is therefore crucial to be able to predict the stress state when evaluating the performance of the material. In this paper, a semi-analytical framework to predict the thermal and diffusion induced stresses in a structural battery under galvanostatic cycling is presented. The proposed model is a concentric cylinder (CC) model coupled with an axisymmetric diffusion model and a one-dimensional heat generation model. The present study shows that the heat generated during electrochemical cycling must be accounted for when evaluating the internal stress state in structural battery composites. Furthermore, the results show that the charge/discharge current, lamina dimensions and residual stresses have significant effect on the internal stress state and effective properties of the composite lamina.

Carbon fibre

Functional Composites

Modelling

Mechanical properties

Electrical properties

Author

David Carlstedt

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Leif Asp

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Composites Science and Technology

0266-3538 (ISSN)

Vol. 179 69-78

Structural pOweR CompositEs foR futurE civil aiRcraft (SORCERER)

European Commission (Horizon 2020), 2017-02-01 -- 2020-02-28.

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

Applied Mechanics

Composite Science and Engineering

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1016/j.compscitech.2019.04.024

More information

Latest update

8/18/2019