期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 168, 期 6, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/ac0699
关键词
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资金
- US Department of Energy Vehicle Technology Program
- US Department of Transportation National Highway Traffic Safety Administration
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA-0003525]
- Office of Electricity Energy Storage Program
This study uses accelerating rate calorimetry to evaluate the impact of cell chemistry, state of charge, cell capacity, and ultimately cell energy density on the thermal runaway process of Li-ion batteries. The research found a strong linear correlation between the total enthalpy of the thermal runaway process and the stored energy of the cell.
This work uses accelerating rate calorimetry to evaluate the impact of cell chemistry, state of charge, cell capacity, and ultimately cell energy density on the total energy release and peak heating rates observed during thermal runaway of Li-ion batteries. While the traditional focus has been using calorimetry to compare different chemistries in cells of similar sizes, this work seeks to better understand how applicable small cell data is to understand the thermal runaway behavior of large cells as well as determine if thermal runaway behaviors can be more generally tied to aspects of lithium-ion cells such as total stored energy and specific energy. We have found a strong linear correlation between the total enthalpy of the thermal runaway process and the stored energy of the cell, apparently independent of cell size and state of charge. We have also shown that peak heating rates and peak temperatures reached during thermal runaway events are more closely tied to specific energy, increasing exponentially in the case of peak heating rates.
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