Electro-chemo-mechanically coupled computational modelling of structural batteries
Artikel i vetenskaplig tidskrift, 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

Författare

David Carlstedt

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Kenneth Runesson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Fredrik Larsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Johanna Xu

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Leif Asp

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Multifunctional Materials

Vol. 3 4 045002

SORCERER

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

Multifunktionellt beteende hos strukturella batterier under kombinerad elekrisk oh mekanisk last

Chalmers, 2020-01-01 -- 2021-12-31.

Skadetålighet hos strukturella batterier

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

Styrkeområden

Transport

Energi

Materialvetenskap

Ämneskategorier

Rymd- och flygteknik

Teknisk mekanik

Kompositmaterial och -teknik

DOI

10.1088/2399-7532/abc60d

Mer information

Senast uppdaterat

2021-01-05