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Abstract
Second-life applications are becoming increasingly popular as they enable enhancement of sustainability and economic efficiency. However, the transition from the first to the second life of batteries introduces safety challenges due to different operating conditions and previous degradation mechanisms. This study investigates the safety implications of high currents in aged cells. Thermal behavior upon cycling with different C-rates, ranging from 0.5 to 4.0 C, was analyzed using commercial 50 Ah NMC/C pouch cells. The tested cells had different aging histories, including minimal cycling and real age. The results revealed a consistent thermal pattern upon cycling, particularly a significant heat generation phase occurring at the end of discharge (3.6–3.0 V), independent of battery age. At higher C-rates, heat generation intensified. While no direct correlation was found between aging and certain thermal parameters, such as absolute maximum temperature and temperature difference, direct correlations were identified with the temperature increase rate and interquartile range. These correlations were linked to reduced thermal conductivity and battery state of health. This study highlights the critical role of considering C-rate, especially for aged cells, emphasizing the need to evaluate the expected current in the second-life application to avoid rapid temperature rises and ensure safety.
Original language | English |
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Title of host publication | Trends in Clean Energy Research |
Subtitle of host publication | Selected Papers from the 9th International Conference on Advances on Clean Energy Research (ICACER 2024) |
Publisher | Springer |
Pages | 189–197 |
ISBN (Electronic) | 978-3-031-67987-2 |
ISBN (Print) | 978-3-031-67986-5, 978-3-031-67989-6 |
DOIs | |
Publication status | Published - 21 Sept 2024 |
Event | 9th International Conference on Advances on Clean Energy Research: ICACER 2024 - Polytech Lille, Lille, France Duration: 27 Apr 2024 → 29 Apr 2024 |
Conference
Conference | 9th International Conference on Advances on Clean Energy Research |
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Abbreviated title | ICACER |
Country/Territory | France |
City | Lille |
Period | 27/04/24 → 29/04/24 |
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Dive into the research topics of 'Effects of C-Rate on the Thermal Behavior of Commercial Lithium-Ion Pouch Cells with Different Aging Histories for a Successful Second-Life Transition'. Together they form a unique fingerprint.Projects
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21_FFG_SafeLIB - Safety Aspects of Lithium-Based Tractions Batteries Including the Qualification for Second Life Applications
Ellersdorfer, C. (Co-Investigator (CoI)), Wilkening, H. M. R. (Co-Investigator (CoI)) & Vorbach, S. (Co-Investigator (CoI))
1/04/21 → 31/03/25
Project: Research project