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Model of a structural battery and its potential for system level mass savings
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.ORCID iD: 0000-0002-1194-9479
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.ORCID iD: 0000-0002-9744-4550
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Applied Electrochemistry.ORCID iD: 0000-0001-9203-9313
2019 (English)In: Multifunctional Materials, ISSN 2399-7532, article id 035002Article in journal (Refereed) Published
Abstract [en]

Structural batteries are materials that can carry mechanical load while storing electrical energy. This is achieved by combining the properties of carbon fiber composites and lithium ion batteries. There are many design parameters for a structural battery and in order to understand their impact and importance, this paper presents a model for multifunctional performance. The mechanical behavior and electrical energy storage of the structural battery are matched to the mechanical behavior of a conventional carbon fiber composite, and the electrical energy storage of a standard lithium ion battery. The latter are both monofunctional and have known performance and mass. In order to calculate the benefit of using structural batteries, the mass of the structural battery is compared to that of the two monofunctional systems. There is often an inverse relationship between the mechanical and electrochemical properties of multifunctional materials, in order to understand these relationships a sensitivity analysis is performed on variables for the structural battery. This gives new insight into the complex multifunctional design of structural batteries.

The results show that it is possible to save mass compared to monofunctional systems but that it depends strongly on the structure it is compared with. With improvements to the design of the structural battery it would be possible to achieve mass saving compared to state-of-the-art composite laminates and lithium ion batteries.

Place, publisher, year, edition, pages
2019. article id 035002
Keywords [en]
multifunctional material, modelling, multifunctional efficiency, weight saving
National Category
Composite Science and Engineering
Research subject
Materials Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-258202DOI: 10.1088/2399-7532/ab3bddOAI: oai:DiVA.org:kth-258202DiVA, id: diva2:1349851
Funder
Swedish Research Council Formas, 2017-03898Swedish Research Council Formas, 621-2014-4577VinnovaSwedish Energy AgencyClean Sky 2, 738085
Note

QC 20190917

Available from: 2019-09-10 Created: 2019-09-10 Last updated: 2019-09-17Bibliographically approved

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