Modeling Heat Conduction in Spiral Geometries

Gomadam, Parthasarathy M.; White, Ralph E.; Weidner, John W.

doi:10.1149/1.1605743

Cited by 60 publications

(37 citation statements)

References 14 publications

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“…The last four equations can be regarded as special cases from corresponding formulas of the spiral geometry restricted to the r − z−plane [48,49]. Therefore, this thermal model can be considered as a serial thermal network in r−direction and a parallel thermal network in z−direction.…”

Section: Simulationsmentioning

confidence: 99%

Modeling and Simulation of the Thermal Runaway Behavior of Cylindrical Li-Ion Cells—Computing of Critical Parameters

et al. 2016

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Abstract: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 LiCoO 2 -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 T crit , above which a thermal runaway may occur is approximately 400 K, which is near the starting temperature of the decomposition of the Solid-Electrolyte-Interface in the anode at 393.15 K. Furthermore, it has been found that a thermal runaway can be described in three main stages.

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Section: Simulationsmentioning

confidence: 99%

Modeling and Simulation of the Thermal Runaway Behavior of Cylindrical Li-Ion Cells—Computing of Critical Parameters

et al. 2016

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“…In most of them, a thermal model is coupled with an electrochemical model so as to simulate the temperature profile of a battery under different operating conditions, geometries or cooling rate [2,3]. Such coupled models can also be used to explore pulse power limitations in order to prevent thermal runaway or to design heat dissipation systems [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Thermal modeling of a cylindrical LiFePO4/graphite lithium-ion battery

Forgez

Vinh

Friedrich

et al. 2010

Journal of Power Sources

749

375

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“…The equation governing the evolution of the surface temperature (T s ) of the cell for a constant ambient temperature T amb has been calculated ( 5). …”

Section: ) Calculation Of the Parameters Of The Equivalent Modelmentioning

confidence: 99%

“…In bibliography different equations are found depending on the assumptions made by the author. In electrochemical models chemical and electrical aspects are taken into account when calculating q [4][5][6][7]. However, models based on experimental tests commonly use the equation proposed by Bernardi et al in [8]; experimental data and electrical variables are needed to calculate the internal heat generation parameter with this equation [9][10][11][12].…”

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confidence: 99%

Methodology for thermal modelling of lithium-ion batteries

Iraola

Aizpuru

Canales

et al. 2013

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society

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Temperature is a determinant parameter in terms of performance, lifespan and safety working with li-ion batteries. Working above 45ºC, in hot climates, has direct influence in the cycle life of the battery and can cause a dangerous failure if higher temperatures are reached; besides, performance of li-ion batteries in cold climates is very poor due to the high internal resistance they present under these ambient conditions. Being able to predict the temperature of a li-ion cell or the temperature distribution in a module for any working condition without testing the device is considered important when designing energy storage systems based on li-ion batteries. Thus, this paper presents a methodology to achieve the equivalent thermal parameters governing the behavior of a single li-ion cell and the power losses within it; different experimental tests are combined with an analytical expression of the power losses inside a cell to reach this target. The parameters obtained are used to develop a model in matlab/simulink and another model solved with CFD software. Simulation results show good agreement with experimental results with a maximum error of 2ºC committed during the validation of the methodology.Keywords-Thermal equivalent model; Li-ion cell; behavioural model. I.

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Modeling Heat Conduction in Spiral Geometries

Cited by 60 publications

References 14 publications

Modeling and Simulation of the Thermal Runaway Behavior of Cylindrical Li-Ion Cells—Computing of Critical Parameters

Modeling and Simulation of the Thermal Runaway Behavior of Cylindrical Li-Ion Cells—Computing of Critical Parameters

Thermal modeling of a cylindrical LiFePO4/graphite lithium-ion battery

Methodology for thermal modelling of lithium-ion batteries

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