Open AccessInvestigating the Role of Energy Density in Thermal Runaway of Lithium-Ion Batteries with Accelerating Rate Calorimetry
Author(s) -
Joshua Lamb,
Loraine Torres-Castro,
John C. Hewson,
Randy Shurtz,
Yuliya Preger
Publication year - 2021
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/ac0699
Subject(s) - thermal runaway , calorimetry , lithium (medication) , work (physics) , thermal , ion , energy density , enthalpy , thermal energy , specific energy , chemistry , thermodynamics , energy (signal processing) , materials science , nuclear engineering , battery (electricity) , engineering physics , physics , quantum mechanics , engineering , endocrinology , medicine , power (physics) , organic chemistry
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.