Modeling and Simulation of the Thermal Runaway Behavior of Cylindrical Li-Ion Cells—Computing of Critical Parameters
Institute for Applied Materials-Applied Materials Physics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz-1, Eggenstein-Leopoldshafen 76344, Germany
Author to whom correspondence should be addressed.
Academic Editor: Sheng S. Zhang
Received: 11 February 2016 / Revised: 31 March 2016 / Accepted: 7 April 2016 / Published: 16 April 2016
The thermal behavior of Li-ion cells is an important safety issue and has to be known under varying thermal conditions. The main objective of this work is to gain a better understanding of the temperature increase within the cell considering different heat sources under specified working conditions. With respect to the governing physical parameters, the major aim is to find out under which thermal conditions a so called Thermal Runaway
occurs. Therefore, a mathematical electrochemical-thermal model based on the Newman model has been extended with a simple combustion model from reaction kinetics including various types of heat sources assumed to be based on an Arrhenius law. This model was realized in COMSOL Multiphysics
modeling software. First simulations were performed for a cylindrical 18650 cell with a
-cathode to calculate the temperature increase under two simple electric load profiles and to compute critical system parameters. It has been found that the critical cell temperature
, above which a thermal runaway may occur is approximately
, which is near the starting temperature of the decomposition of the Solid-Electrolyte-Interface in the anode at
. Furthermore, it has been found that a thermal runaway can be described in three main stages.
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Melcher, A.; Ziebert, C.; Rohde, M.; Seifert, H.J. Modeling and Simulation of the Thermal Runaway Behavior of Cylindrical Li-Ion Cells—Computing of Critical Parameters. Energies 2016, 9, 292.
Melcher A, Ziebert C, Rohde M, Seifert HJ. Modeling and Simulation of the Thermal Runaway Behavior of Cylindrical Li-Ion Cells—Computing of Critical Parameters. Energies. 2016; 9(4):292.
Melcher, Andreas; Ziebert, Carlos; Rohde, Magnus; Seifert, Hans J. 2016. "Modeling and Simulation of the Thermal Runaway Behavior of Cylindrical Li-Ion Cells—Computing of Critical Parameters." Energies 9, no. 4: 292.
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