{"title":"局部过热条件下锂离子电池内部热失控传播的现场测量和建模","authors":"Stefan Schaeffler, Andreas Jossen","doi":"10.1016/j.jpowsour.2024.234968","DOIUrl":null,"url":null,"abstract":"<div><p>Understanding internal processes before and during thermal runaway (TR) is essential for designing safe battery systems. This study aims to experimentally investigate and model the influence of temperature gradients on the initiation of TR and its propagation within lithium-ion cells. Local overheating abuse tests in an autoclave are performed with constant and stepwise heating profiles to apply extreme thermal inhomogeneities to the cells. The internal TR propagation is measured in situ with built-in thermocouples at different positions within the electrode-separator stack and on the surface of the cells. Results show the influence of the layered structure on in-plane and through-plane TR propagation. Further, the stepwise overheating procedure discloses the considerable influence of temperature gradients and local decrease in reactivity due to the consumption of reactants with a measured local temperature of 347 °C inside the cell before TR. Additionally, a simplified TR model with two Arrhenius equations is parameterized using accelerating rate calorimetry (ARC) and validated with local overheating experiments. In this regard, the influence of mass loss is also examined. The results demonstrate that the simplified approach is sufficient for considering thermal inhomogeneities and can significantly improve simulations compared to utilizing fixed trigger temperatures obtained directly from ARC experiments.</p></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378775324009200/pdfft?md5=422f9d58567d403ac9b64a65a96d094b&pid=1-s2.0-S0378775324009200-main.pdf","citationCount":"0","resultStr":"{\"title\":\"In situ measurement and modeling of internal thermal runaway propagation within lithium-ion cells under local overheating conditions\",\"authors\":\"Stefan Schaeffler, Andreas Jossen\",\"doi\":\"10.1016/j.jpowsour.2024.234968\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Understanding internal processes before and during thermal runaway (TR) is essential for designing safe battery systems. This study aims to experimentally investigate and model the influence of temperature gradients on the initiation of TR and its propagation within lithium-ion cells. Local overheating abuse tests in an autoclave are performed with constant and stepwise heating profiles to apply extreme thermal inhomogeneities to the cells. The internal TR propagation is measured in situ with built-in thermocouples at different positions within the electrode-separator stack and on the surface of the cells. Results show the influence of the layered structure on in-plane and through-plane TR propagation. Further, the stepwise overheating procedure discloses the considerable influence of temperature gradients and local decrease in reactivity due to the consumption of reactants with a measured local temperature of 347 °C inside the cell before TR. Additionally, a simplified TR model with two Arrhenius equations is parameterized using accelerating rate calorimetry (ARC) and validated with local overheating experiments. In this regard, the influence of mass loss is also examined. The results demonstrate that the simplified approach is sufficient for considering thermal inhomogeneities and can significantly improve simulations compared to utilizing fixed trigger temperatures obtained directly from ARC experiments.</p></div>\",\"PeriodicalId\":377,\"journal\":{\"name\":\"Journal of Power Sources\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-07-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0378775324009200/pdfft?md5=422f9d58567d403ac9b64a65a96d094b&pid=1-s2.0-S0378775324009200-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Power Sources\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0378775324009200\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Power Sources","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378775324009200","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
In situ measurement and modeling of internal thermal runaway propagation within lithium-ion cells under local overheating conditions
Understanding internal processes before and during thermal runaway (TR) is essential for designing safe battery systems. This study aims to experimentally investigate and model the influence of temperature gradients on the initiation of TR and its propagation within lithium-ion cells. Local overheating abuse tests in an autoclave are performed with constant and stepwise heating profiles to apply extreme thermal inhomogeneities to the cells. The internal TR propagation is measured in situ with built-in thermocouples at different positions within the electrode-separator stack and on the surface of the cells. Results show the influence of the layered structure on in-plane and through-plane TR propagation. Further, the stepwise overheating procedure discloses the considerable influence of temperature gradients and local decrease in reactivity due to the consumption of reactants with a measured local temperature of 347 °C inside the cell before TR. Additionally, a simplified TR model with two Arrhenius equations is parameterized using accelerating rate calorimetry (ARC) and validated with local overheating experiments. In this regard, the influence of mass loss is also examined. The results demonstrate that the simplified approach is sufficient for considering thermal inhomogeneities and can significantly improve simulations compared to utilizing fixed trigger temperatures obtained directly from ARC experiments.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems