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Analysis of internal temperature variations of lithium-ion batteries during fast charging
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Fereshteh-Saniee, Nessa, Somasundaran, Nithin, Gulsoy, Begum, Vincent, Timothy A., Amor-Segan, Mark and Marco, James (2022) Analysis of internal temperature variations of lithium-ion batteries during fast charging. In: ICMT2022 : 25th International Conference on Mechatronics Technology, Kaohsiung, Taiwan, 18-21 Nov 2022. Published in: IEEE ICMT 2022 conference proceeding [ 🗎 Public]. [ (✓) hoa:511 ] (In Press)
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Official URL: https://ieeexplore.ieee.org/Xplore/home.jsp
Abstract
One of the major challenges that limits the fast charging of Lithium-ion batteries is Lithium (Li) plating at low temperatures. To reduce Li-plating an increased environmental temperature is commonly used. However, the uncertainties in the measurement of key battery internal states such as temperature, is a limiting factor to find the best fast charging profile that considers battery performance, degradation, and safety of the electric vehicles (EVs). We have used our state-of-the-art instrumented cells equipped with internal data acquisition and microcontroller, forming smart cells, that enable sensor data to be transmitted via a USB to a data logger. We demonstrate here that commercially available 21700 format cells were successfully instrumented and gave direct information on internal temperature for continuous fast charging rates from C/2 to 2.5C. The internal temperature was found to be considerably higher than that of the surface of the cell (between 10 and 14°C at 2.5C charge rate). A gradient of up to 2°C was found between the positive and negative end of each cell that became more prominent for higher charge rates. Li-plating was detected for all C-rates below 25°C even though, the internal temperature rose above 30°C when the cells were charged at 2.5C with an ambient temperature of 0°C. At a higher ambient temperature of 40°C, the cell’s internal temperature rose (to ~62°C) beyond the safe limits defined by the manufacturer’s datasheet whilst the external temperature recorded (~52°C) was within the manufacturer’s defined safe operating limits.
| Item Type: | Conference Item (Paper) | |||||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
| Journal or Publication Title: | IEEE ICMT 2022 conference proceeding | |||||||||
| Publisher: | IEEE Xplore | |||||||||
| Official Date: | 18 October 2022 | |||||||||
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| Status: | Peer Reviewed | |||||||||
| Publication Status: | In Press | |||||||||
| Reuse Statement (publisher, data, author rights): | © 2022 Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 2 December 2022 | |||||||||
| Date of first compliant Open Access: | 2 December 2022 | |||||||||
| RIOXX Funder/Project Grant: |
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| Conference Paper Type: | Paper | |||||||||
| Title of Event: | ICMT2022 : 25th International Conference on Mechatronics Technology | |||||||||
| Type of Event: | Conference | |||||||||
| Location of Event: | Kaohsiung, Taiwan | |||||||||
| Date(s) of Event: | 18-21 Nov 2022 | |||||||||
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