Thermal and diffusion induced stresses in a structural battery under galvanostatic cycling
Artikel i vetenskaplig tidskrift, 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.

Modelling

Electrical properties

Functional Composites

Mechanical properties

Carbon fibre

Författare

David Carlstedt

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Leif Asp

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Composites Science and Technology

0266-3538 (ISSN)

Vol. 179 69-78

Skadetålighet hos strukturella batterier

Amerikanska flygvapnets kontor för strategisk forskning (AFOSR), 2017-09-30 -- 2020-09-29.

SORCERER

Europeiska kommissionen (Horisont 2020), 2017-02-01 -- 2020-02-28.

Styrkeområden

Transport

Energi

Materialvetenskap

Ämneskategorier

Teknisk mekanik

Kompositmaterial och -teknik

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1016/j.compscitech.2019.04.024

Mer information

Skapat

2019-05-10