On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and Degradation
Understanding and mitigating the degradation of batteries is important for financial as well as environmental reasons. Many studies look at cell degradation in terms of capacity losses and the mechanisms causing them. However, in this study, we take a closer look at how degradation affects heat sour...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Batteries |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2313-0105/9/5/249 |
| _version_ | 1797601127211991040 |
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| author | Lena Spitthoff Markus Solberg Wahl Jacob Joseph Lamb Paul Robert Shearing Preben J. S. Vie Odne Stokke Burheim |
| author_facet | Lena Spitthoff Markus Solberg Wahl Jacob Joseph Lamb Paul Robert Shearing Preben J. S. Vie Odne Stokke Burheim |
| author_sort | Lena Spitthoff |
| collection | DOAJ |
| description | Understanding and mitigating the degradation of batteries is important for financial as well as environmental reasons. Many studies look at cell degradation in terms of capacity losses and the mechanisms causing them. However, in this study, we take a closer look at how degradation affects heat sources in batteries, thereby requiring dynamic cooling strategies for battery systems throughout the battery life. In this work, we have studied and compared reversible (entropy-related) and non-reversible heat sources in a commercial LCO-graphite lithium-ion battery (LIB) alongside measuring the surface temperature as a function of the State of Health (SoH). In addition, we studied the effect of different thermal management strategies on both degradation and cooling efficiency. We found that entropic heating plays a major role in overall heat generation. This causes large variations in heat generation and battery temperature over both State of Charge (SoC) and charge versus discharge. The maximum battery temperature increases when the cell degrades as irreversible heat generation increases. Temperature variations over the cell thickness are substantial and increase drastically when the cell degrades. In addition, significant increases in thickness were observed as a result of cell degradation. Furthermore, cycling at elevated temperatures resulted in a larger thickness increase with significant gas production. |
| first_indexed | 2024-03-11T03:57:03Z |
| format | Article |
| id | doaj.art-c309ef45111a4bf49e23004bbb0be200 |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-03-11T03:57:03Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-c309ef45111a4bf49e23004bbb0be2002023-11-18T00:28:24ZengMDPI AGBatteries2313-01052023-04-019524910.3390/batteries9050249On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and DegradationLena Spitthoff0Markus Solberg Wahl1Jacob Joseph Lamb2Paul Robert Shearing3Preben J. S. Vie4Odne Stokke Burheim5Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, NorwayDepartment of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, NorwayDepartment of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, NorwayDepartment of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, NorwayDepartment of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, NorwayDepartment of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, NorwayUnderstanding and mitigating the degradation of batteries is important for financial as well as environmental reasons. Many studies look at cell degradation in terms of capacity losses and the mechanisms causing them. However, in this study, we take a closer look at how degradation affects heat sources in batteries, thereby requiring dynamic cooling strategies for battery systems throughout the battery life. In this work, we have studied and compared reversible (entropy-related) and non-reversible heat sources in a commercial LCO-graphite lithium-ion battery (LIB) alongside measuring the surface temperature as a function of the State of Health (SoH). In addition, we studied the effect of different thermal management strategies on both degradation and cooling efficiency. We found that entropic heating plays a major role in overall heat generation. This causes large variations in heat generation and battery temperature over both State of Charge (SoC) and charge versus discharge. The maximum battery temperature increases when the cell degrades as irreversible heat generation increases. Temperature variations over the cell thickness are substantial and increase drastically when the cell degrades. In addition, significant increases in thickness were observed as a result of cell degradation. Furthermore, cycling at elevated temperatures resulted in a larger thickness increase with significant gas production.https://www.mdpi.com/2313-0105/9/5/249LIBdegradationheat generationentropy |
| spellingShingle | Lena Spitthoff Markus Solberg Wahl Jacob Joseph Lamb Paul Robert Shearing Preben J. S. Vie Odne Stokke Burheim On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and Degradation Batteries LIB degradation heat generation entropy |
| title | On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and Degradation |
| title_full | On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and Degradation |
| title_fullStr | On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and Degradation |
| title_full_unstemmed | On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and Degradation |
| title_short | On the Relations between Lithium-Ion Battery Reaction Entropy, Surface Temperatures and Degradation |
| title_sort | on the relations between lithium ion battery reaction entropy surface temperatures and degradation |
| topic | LIB degradation heat generation entropy |
| url | https://www.mdpi.com/2313-0105/9/5/249 |
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