Measurement of the temperature-dependent cross-plane thermal conductivity of the Li-ion battery pouch cell
Due to the lamella structure of Li-ion batteries, their cross-plane thermal conductivity is substantially lower than the in-plane conductivity. This leads to pronounced anisotropy, which complicates the accurate measurement of thermal conductivity, underscoring the importance of precise temperature...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Power Sources Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666248525000010 |
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| author | Minjoo Kim Dong-min Kim Young-Beom Kim Bong Jae Lee |
| author_facet | Minjoo Kim Dong-min Kim Young-Beom Kim Bong Jae Lee |
| author_sort | Minjoo Kim |
| collection | DOAJ |
| description | Due to the lamella structure of Li-ion batteries, their cross-plane thermal conductivity is substantially lower than the in-plane conductivity. This leads to pronounced anisotropy, which complicates the accurate measurement of thermal conductivity, underscoring the importance of precise temperature monitoring to better understand and manage thermal behavior within the battery. This study presents an effective approach for precisely measuring the cross-plane thermal conductivity of Lithium Iron Phosphate (LFP) pouch cell by utilizing a guarded-hot-plate (GHP) method. We minimized edge effects and promoted one-dimensional heat flow by strategically determining the size of the main and guide plates of the GHP device. Calibration experiments resulted in a measurement uncertainty of about 2%. Notably, our measurements showed that the cross-plane thermal conductivity of LFP pouch cell is strongly temperature-dependent, changing from 0.128±0.005 Wm−1K−1 at 21.7 °C to 0.199±0.006 Wm−1K−1 at 44 °C (i.e., 55% increase). It is also shown that the thermal conductivity of two LFP pouch cells, despite their identical specifications, display noticeable discrepancies, which is due to their different SOC levels of 79.6% and 87.1%. This research provides a detailed framework for evaluating the cross-plane thermal conductivity of Li-ion batteries, offering critical insights into their thermal behavior at different temperatures and contributing to developing their improved thermal management strategies. |
| format | Article |
| id | doaj-art-4c3aa6a3d02444ccb0c441de2da9e924 |
| institution | Kabale University |
| issn | 2666-2485 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Power Sources Advances |
| spelling | doaj-art-4c3aa6a3d02444ccb0c441de2da9e9242025-01-29T05:02:02ZengElsevierJournal of Power Sources Advances2666-24852025-01-0131100167Measurement of the temperature-dependent cross-plane thermal conductivity of the Li-ion battery pouch cellMinjoo Kim0Dong-min Kim1Young-Beom Kim2Bong Jae Lee3Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea; Center for Extreme Thermal Physics and Manufacturing, Korea Advanced Institute of Science and Technology, Daejeon 34141, South KoreaDepartment of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea; Center for Extreme Thermal Physics and Manufacturing, Korea Advanced Institute of Science and Technology, Daejeon 34141, South KoreaDepartment of Mechanical Convergence Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, South KoreaDepartment of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea; Center for Extreme Thermal Physics and Manufacturing, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea; Corresponding author at: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea.Due to the lamella structure of Li-ion batteries, their cross-plane thermal conductivity is substantially lower than the in-plane conductivity. This leads to pronounced anisotropy, which complicates the accurate measurement of thermal conductivity, underscoring the importance of precise temperature monitoring to better understand and manage thermal behavior within the battery. This study presents an effective approach for precisely measuring the cross-plane thermal conductivity of Lithium Iron Phosphate (LFP) pouch cell by utilizing a guarded-hot-plate (GHP) method. We minimized edge effects and promoted one-dimensional heat flow by strategically determining the size of the main and guide plates of the GHP device. Calibration experiments resulted in a measurement uncertainty of about 2%. Notably, our measurements showed that the cross-plane thermal conductivity of LFP pouch cell is strongly temperature-dependent, changing from 0.128±0.005 Wm−1K−1 at 21.7 °C to 0.199±0.006 Wm−1K−1 at 44 °C (i.e., 55% increase). It is also shown that the thermal conductivity of two LFP pouch cells, despite their identical specifications, display noticeable discrepancies, which is due to their different SOC levels of 79.6% and 87.1%. This research provides a detailed framework for evaluating the cross-plane thermal conductivity of Li-ion batteries, offering critical insights into their thermal behavior at different temperatures and contributing to developing their improved thermal management strategies.http://www.sciencedirect.com/science/article/pii/S2666248525000010Li-ion batteryTemperature-dependentCross-plane thermal conductivityGuarded-hot-plate method |
| spellingShingle | Minjoo Kim Dong-min Kim Young-Beom Kim Bong Jae Lee Measurement of the temperature-dependent cross-plane thermal conductivity of the Li-ion battery pouch cell Journal of Power Sources Advances Li-ion battery Temperature-dependent Cross-plane thermal conductivity Guarded-hot-plate method |
| title | Measurement of the temperature-dependent cross-plane thermal conductivity of the Li-ion battery pouch cell |
| title_full | Measurement of the temperature-dependent cross-plane thermal conductivity of the Li-ion battery pouch cell |
| title_fullStr | Measurement of the temperature-dependent cross-plane thermal conductivity of the Li-ion battery pouch cell |
| title_full_unstemmed | Measurement of the temperature-dependent cross-plane thermal conductivity of the Li-ion battery pouch cell |
| title_short | Measurement of the temperature-dependent cross-plane thermal conductivity of the Li-ion battery pouch cell |
| title_sort | measurement of the temperature dependent cross plane thermal conductivity of the li ion battery pouch cell |
| topic | Li-ion battery Temperature-dependent Cross-plane thermal conductivity Guarded-hot-plate method |
| url | http://www.sciencedirect.com/science/article/pii/S2666248525000010 |
| work_keys_str_mv | AT minjookim measurementofthetemperaturedependentcrossplanethermalconductivityoftheliionbatterypouchcell AT dongminkim measurementofthetemperaturedependentcrossplanethermalconductivityoftheliionbatterypouchcell AT youngbeomkim measurementofthetemperaturedependentcrossplanethermalconductivityoftheliionbatterypouchcell AT bongjaelee measurementofthetemperaturedependentcrossplanethermalconductivityoftheliionbatterypouchcell |