Temperature Rise in Prismatic Polymer Lithium-Ion Batteries: An Analytic Approach

Taheri, Peyman; Bahrami, Majid

doi:10.4271/2012-01-0334

Cited by 67 publications

(52 citation statements)

References 22 publications

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“…Layer numbers and dimensions are taken from (5). Due to symmetric properties of the geometry and the boundary conditions with a symmetry plane located parallel to the battery layers in the middle of the cell, only half of the battery is meshed.…”

Section: Simulation Setup and Model Fittingmentioning

confidence: 99%

Electrothermal and Electrochemical Modeling of Lithium-ion Batteries: 3D Simulation with Experimental Validation

Fink

Kaltenegger

2014

ECS Trans.

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This work presents two lithium-ion battery models which are implemented in the multiphysics software package FIRE ® , developed by AVL List GmbH: an efficient electrothermal model based on an empirical voltage/current relationship and a physically based, non-isothermal electrochemical model. The models are applied to a 3D simulation of a high energy lithium-ion pouch battery. Both models are adjusted to measured discharge curves for various currents and temperatures. Then their results are compared and a deep insight into the electrodes is given by the electrochemical model. Here, the importance of 3D effects and temperature influence are pointed out -both effects which are often neglected in electrochemical models presented in literature. Finally, both models are compared to voltage and temperature measurements using a realistic, strongly dynamic driving profile. A highly accurate prediction of the experimental data can be achieved with both models.

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Section: Simulation Setup and Model Fittingmentioning

confidence: 99%

Electrothermal and Electrochemical Modeling of Lithium-ion Batteries: 3D Simulation with Experimental Validation

Fink

Kaltenegger

2014

ECS Trans.

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“…In particular, there is not that many reports on thermal conductivity of separators. In the literature, we find values for separators, but these values vary from 0.33-1.29 WK −1 m −1 [19][20][21][22]. Some of these values are assumed and there are almost no reports on the experimental determination of the cross-plane thermal conductivity of a separator.…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity and internal temperature profiles of Li-ion secondary batteries

Richter

Kjelstrup

Vie

et al. 2017

Journal of Power Sources

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“…These are shown in Table II along with the thermal properties taken from Taheri et al, 38 where the values for the anode, cathode and separator are given whilst these components are wetted with electrolyte.…”

Section: Incremental Capacity Analysis (Ica)-another Technique Thatmentioning

confidence: 99%

Surface Cooling Causes Accelerated Degradation Compared to Tab Cooling for Lithium-Ion Pouch Cells

Hunt

Zhao

Patel

et al. 2016

J. Electrochem. Soc.

160

119

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One of the biggest causes of degradation in lithium-ion batteries is elevated temperature. In this study we explored the effects of cell surface cooling and cell tab cooling, reproducing two typical cooling systems that are used in real-world battery packs. For new cells using slow-rate standardized testing, very little difference in capacity was seen. However, at higher rates, discharging the cell in just 10 minutes, surface cooling led to a loss of useable capacity of 9.2% compared to 1.2% for cell tab cooling. After cycling the cells for 1,000 times, surface cooling resulted in a rate of loss of useable capacity under load three times higher than cell tab cooling. We show that this is due to thermal gradients being perpendicular to the layers for surface cooling leading to higher local currents and faster degradation, but in-plane with the layers for tab cooling leading to more homogenous behavior. Understanding how thermal management systems interact with the operation of batteries is therefore critical in extending their performance. For automotive applications where 80% capacity is considered end-of-life, using tab cooling rather than surface cooling would therefore be equivalent to extending the lifetime of a pack by 3 times, or reducing the lifetime cost by 66%. Due to their high energy and power densities, Lithium-ion batteries are a very important component of electric vehicles, and their use has increased dramatically in recent years as the uptake of hybrid and electric vehicles has increased.1-3 One of the major challenges of using lithium-ion batteries in hybrid and electric vehicles is thermal management, 4 which is important in order to manage degradation at an acceptable rate whilst maximizing the performance of the batteries and reducing the risk of thermal runaway. 5-7Many studies have shown that increased temperature leads to an increase in the rate of degradation, 4,[8][9][10][11] therefore the effectiveness of a thermal management system is vital in order to maximize the lifetime performance of the pack. The design of a good thermal management system for a battery pack should consider both the overall temperature of the pack and both intra-cell and internal thermal gradients. Poor design of thermal management systems could be a major contributing factor in increasing degradation rates to unacceptable levels. 12There are many different techniques that can be used to thermally manage batteries in hybrid and electric vehicles. It is possible to use either air or liquid as the cooling medium, and both of these can be used in either a direct (with cooling medium in contact with the cell) or indirect way. In addition to this, different areas of the cell can be cooled, namely the surfaces of the cell or the cell tabs. 13,14 In general, systems employing air as the cooling medium are considered to be simpler and cheaper to implement, although the performance is limited especially in applications where there is a high heat generation rate or if the batteries are being operated in a high ambient tempe...

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Temperature Rise in Prismatic Polymer Lithium-Ion Batteries: An Analytic Approach

Cited by 67 publications

References 22 publications

Electrothermal and Electrochemical Modeling of Lithium-ion Batteries: 3D Simulation with Experimental Validation

Electrothermal and Electrochemical Modeling of Lithium-ion Batteries: 3D Simulation with Experimental Validation

Thermal conductivity and internal temperature profiles of Li-ion secondary batteries

Surface Cooling Causes Accelerated Degradation Compared to Tab Cooling for Lithium-Ion Pouch Cells

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