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Characterization and modelling of Al and Cu busbar during charging and discharging of Li-ion battery for electric vehicles
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Mypati, Omkar, Anwaar, Tariq, Mitra, Desham, Pal, Surjya Kanta and Srirangam, Prakash (2023) Characterization and modelling of Al and Cu busbar during charging and discharging of Li-ion battery for electric vehicles. Applied Thermal Engineering, 218 . 119239. doi:10.1016/j.applthermaleng.2022.119239 ISSN 1359-4311.
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Official URL: http://dx.doi.org/10.1016/j.applthermaleng.2022.11...
Abstract
The electrical components such as bimetallic busbar joints of the lithium-ion (Li-ion) batteries should be able to withstand high voltages during charge and discharge processes. The busbar is an essential component that transmits high power to electrify the vehicle. The present study describes the sustainability of friction stir welded (FSW) busbar at different C-rates by simulating a Li-ion battery attached to a busbar, then correlating the heat generation of simulation results with an experimental result at 1, 1.5, and 2C-rates. The change in process parameters of FSW samples varies with electrical conductivity at the weld interface. The variation in electrical conductivity with different busbars is due to the formation of various intermetallic and changes in the grain size of the Al and Cu joints. However, the busbar with Cu-rich intermetallic exhibits smaller electrical resistivity. The specific electrical contact resistance of a busbar is obtained from simulation by validating the heat generated during constant time charge–discharge cycles. The temperature rises due to contact resistance in the Al-Cu busbar which can lead to thermal runaway and, eventually, short circuits in the Li-ion battery pack. Based on previous simulation parameters, the Li-ion cells are simulated at 5 and 10C-rates to understand thermal runaway behaviour.
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TS Manufactures |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | Friction stir welding, Bus conductors (Electricity), Lithium ion batteries, Electric vehicles, Intermetallic compounds | ||||||||
| Journal or Publication Title: | Applied Thermal Engineering | ||||||||
| Publisher: | Pergamon | ||||||||
| ISSN: | 1359-4311 | ||||||||
| Official Date: | 5 January 2023 | ||||||||
| Dates: |
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| Volume: | 218 | ||||||||
| Article Number: | 119239 | ||||||||
| DOI: | 10.1016/j.applthermaleng.2022.119239 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 27 October 2022 |
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