Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compression
With extensive recent deployment of lithium batteries in stationary and mobility applications, integration engineers face a challenging burden for design and planning the static and dynamic external environment surrounding cells. Essential to these designs are understanding how cells respond to mech...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Applications in Engineering Science |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666496825000093 |
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| author | Daniele Cioni Lucas Lapostolle Miguel Costas Steven Boles David Morin |
| author_facet | Daniele Cioni Lucas Lapostolle Miguel Costas Steven Boles David Morin |
| author_sort | Daniele Cioni |
| collection | DOAJ |
| description | With extensive recent deployment of lithium batteries in stationary and mobility applications, integration engineers face a challenging burden for design and planning the static and dynamic external environment surrounding cells. Essential to these designs are understanding how cells respond to mechanical compression and the thresholds for initiating catastrophic failure. This study investigates how the state of charge (SOC) affects the compressive mechanical behaviour and the occurrence of internal short circuits (ISC) in lithium-ion pouch cells. NMC811 lithium-ion pouch cells were subjected to uniaxial compression tests at different SOCs, namely deep discharge, 0 %, 50 %, and 100 %. The results showed that the SOC has a minor effect on macroscopic compression behaviour and the occurrence of ISC. Engineering stress at ISC increased linearly with the SOC due to slight stiffening at higher SOC levels, while engineering strain at ISC remained constant. These findings suggest that deep-discharged cells can be used for safer mechanical testing, as their mechanical response is effectively equivalent to that of charged cells, but poses a lower safety risk. Furthermore, the results of this study align with prior research regarding the influence of SOC on the mechanical response of pouch cells. Such response is deemed to be influenced by compressive internal stresses, generated by the constrained SOC-related swelling of the jellyroll. |
| format | Article |
| id | doaj-art-3eb0d4eef15a4759ac09c6d63644e086 |
| institution | DOAJ |
| issn | 2666-4968 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applications in Engineering Science |
| spelling | doaj-art-3eb0d4eef15a4759ac09c6d63644e0862025-08-20T02:51:38ZengElsevierApplications in Engineering Science2666-49682025-03-012110021110.1016/j.apples.2025.100211Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compressionDaniele Cioni0Lucas Lapostolle1Miguel Costas2Steven Boles3David Morin4Structural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), NO-7491, Trondheim, Norway; Corresponding author.Univ. Bordeaux, CNRS, Bordeaux INP, I2M, UMR 5295, F-33400, Talence, France; Arts et Metiers Institute of Technology, CNRS, Bordeaux INP, I2M, UMR 5295, F-33400, Talence, FranceStructural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), NO-7491, Trondheim, NorwayDepartment of Energy and Process Engineering, Faculty of Engineering, NTNU - Norwegian University of Science and Technology, NO-7491, Trondheim, NorwayStructural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), NO-7491, Trondheim, NorwayWith extensive recent deployment of lithium batteries in stationary and mobility applications, integration engineers face a challenging burden for design and planning the static and dynamic external environment surrounding cells. Essential to these designs are understanding how cells respond to mechanical compression and the thresholds for initiating catastrophic failure. This study investigates how the state of charge (SOC) affects the compressive mechanical behaviour and the occurrence of internal short circuits (ISC) in lithium-ion pouch cells. NMC811 lithium-ion pouch cells were subjected to uniaxial compression tests at different SOCs, namely deep discharge, 0 %, 50 %, and 100 %. The results showed that the SOC has a minor effect on macroscopic compression behaviour and the occurrence of ISC. Engineering stress at ISC increased linearly with the SOC due to slight stiffening at higher SOC levels, while engineering strain at ISC remained constant. These findings suggest that deep-discharged cells can be used for safer mechanical testing, as their mechanical response is effectively equivalent to that of charged cells, but poses a lower safety risk. Furthermore, the results of this study align with prior research regarding the influence of SOC on the mechanical response of pouch cells. Such response is deemed to be influenced by compressive internal stresses, generated by the constrained SOC-related swelling of the jellyroll.http://www.sciencedirect.com/science/article/pii/S2666496825000093Lithium-ion batteryShort circuitDeep dischargeMechanical deformationPouch cell |
| spellingShingle | Daniele Cioni Lucas Lapostolle Miguel Costas Steven Boles David Morin Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compression Applications in Engineering Science Lithium-ion battery Short circuit Deep discharge Mechanical deformation Pouch cell |
| title | Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compression |
| title_full | Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compression |
| title_fullStr | Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compression |
| title_full_unstemmed | Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compression |
| title_short | Influence of the state-of-charge on the mechanical behaviour of lithium-ion pouch cells under uniaxial compression |
| title_sort | influence of the state of charge on the mechanical behaviour of lithium ion pouch cells under uniaxial compression |
| topic | Lithium-ion battery Short circuit Deep discharge Mechanical deformation Pouch cell |
| url | http://www.sciencedirect.com/science/article/pii/S2666496825000093 |
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