Thermal Analysis of Fin Cooling Large Format Automotive Lithium-Ion Pouch Cells

Worwood, Daniel; Kellner, Quirin; Hosseinzadeh, Elham; Mullen, David; Greenwood, David; Marco, James; McGlen, Ryan J.; Lynn, Kevin

doi:10.1109/vppc.2017.8330874

Cited by 3 publications

(5 citation statements)

References 27 publications

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“…This can be more crucial in case of large format batteries with high current flows which generate a higher amount of heat and have a larger surface area. Generally it is difficult to manage the heat from large format batteries very efficiently [18][19][20][21]. This part presents the impact of nonidentical initial temperatures on the performance of the parallel cells within the (1S 5P) ESS during the constant 3C discharge event.…”

Section: Resultsmentioning

confidence: 99%

Unballanced Performance of Parallel Connected Large Format Lithium Ion Batteries for Electric Vehicle Application

Hosseinzadeh

Odio

Marco

et al. 2019

2019 International Conference on Smart Energy Systems and Technologies (SEST)

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Section: Resultsmentioning

confidence: 99%

Unballanced Performance of Parallel Connected Large Format Lithium Ion Batteries for Electric Vehicle Application

Hosseinzadeh

Odio

Marco

et al. 2019

2019 International Conference on Smart Energy Systems and Technologies (SEST)

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“…It enhances the cooling efficiency while still maintaining decent thermo‐physical properties. On the other hand, oils, such as mineral or synthetic oils, are employed as alternative coolants 37,38 . They have lower heat capacity compared to water and ethylene glycol, but they exhibit higher resistance to flow and thermal stability, making them suitable for specific applications 39,40 .…”

Section: Liquid Cooled Thermal Management Systemmentioning

confidence: 99%

“…On the other hand, oils, such as mineral or synthetic oils, are employed as alternative coolants. 37,38 They have lower heat capacity compared to water and ethylene glycol, but they exhibit higher resistance to flow and thermal stability, making them suitable for specific applications. 39,40 The choice of coolant can significantly impact the battery's overall thermal performance, affecting its ability to dissipate heat efficiently and maintain optimal operating temperatures.…”

Section: Liquid Cooled Thermal Management Systemmentioning

confidence: 99%

A comparative study of thermo‐physical properties of different nanofluids for effective heat transfer leading to Li‐ion battery pack cooling

Thorat,

Sanap,

Gawade

2024

Energy Storage

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The rapid advancement in Lithium‐ion battery technology has significantly boosted the electric vehicle market worldwide. These batteries are highly sought after by automobile manufacturers and researchers due to their exceptional energy storage and power capabilities. However, efficient working temperatures ranges from 15°C to 35°C, making it essential to implement battery cooling and heating methods to maintain optimal performance. This study primarily focuses on battery cooling. The automotive manufactures have focused on ethylene glycol, water and synthetic oils as commonly used coolants for keeping the lithium‐ion battery pack within working temperature limits. However, these fluids have lower heat conduction, leading to reduced heat transfer rates and diminished cooling performance. To address this issue, nano‐enhanced fluids, which are engineered fluids containing suspended nanospheres, have been explored. The heat transfer properties of conventional coolants are increased using nano‐enhanced fluids, thereby improving heat conduction and promoting efficient heat transfer within the battery. The study compares the temperature‐related characteristic of different nano‐enhanced fluids, including oxides of copper (CuO), titanium (TiO2), aluminum (Al2O3), silicon (SiO2), and zinc (ZnO), when added to base fluids such as synthetic oils, water and ethylene glycol. The importance to capacity of specific heat, conductivity of fluid thermally, fluid resistance to flow and fluid volumetric mass which are affected by changes in temperature limits are stressed upon. Depending on the specific application and test conditions, the effectiveness of one nano‐enhanced fluid may outperform the others. In conclusion, the thermo physical properties of nanofluids play a critical role in maintaining the battery pack temperature within operating temperature limits. The selections of nanofluids for particular battery thermal management system depends upon its arrangement along the battery pack and cell geometry. The cooling performance using nanofluids as coolant is 10% to 15% higher than the conventional used fluids. This nano‐enhanced fluid show great promise in enhancing the cooling capabilities of battery cooling systems, contributing to improved Lithium‐ion battery performance in electric vehicles.

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“…1f. Given the good contact between the cooling fins and the cell surface, the thermocouple measurements are used as pseudo-cell surface measurements [22]. Each cell is individually connected to cell cycling channels, which can provide a maximum current of 400 A per cell.…”

Section: Experimental Rigmentioning

confidence: 99%

“…Specifically, for cylindrical cells [19], internal cooling with an inserted heat pipe system and/or double tab cooling strategies were required to limit the maximum cell temperature gradient to 5℃, where conventional radial surface cooling gave rise to temperature gradients exceeding 15 ℃. Other experimental studies for pouch cells [22] have also demonstrated the need for more advanced cooling materials to avoid the evolution of thermal gradients exceeding 10 ℃ when exposed to the HP-C. Hosseinzadeh et al [23] developed a 1D electrochemical-thermal model to simulate the heat generation a 53 Ah pouch cell at various ambient temperatures. In their study a cell was subject to the HP-C, and a profile derived from the WLTP (Worldwide Harmonised Light Vehicle Test Procedure) Class 3 to validate the model and predict the increase in cell temperature arising from these vastly different automotive use cases.…”

Section: Introductionmentioning

confidence: 99%

Duty-cycle characterisation of large-format automotive lithium ion pouch cells for high performance vehicle applications

Kellner

Worwood

Barai

et al. 2018

Journal of Energy Storage

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A B S T R A C TThe long-term behaviour of lithium ion batteries in high-performance (HP) electric vehicle (EV) applications is not well understood due to a lack of suitable testing cycles and experimental data. As such a generic HP duty cycle (HP-C), representing driving on a race track is validated, and six NMC graphite cells are characterised with respect to cycle-life. To enable a comparison between the HP-EV environment and conventional road driving, two test groups of cells are subject to an experimental evaluation over 200 duty cycles that includes a representative HP-C and a standard duty cycle from the IEC 62660-1 standard (IECC). After testing, both test groups display increased energy capacity, increased pure Ohmic resistance, lower charge transfer resistance an extended OCV operating window. The changes are more pronounced for cells subject to the HP-C. Based on capacity tests, Electrochemical Impedance Spectroscopy (EIS), pseudo-OCV tests, and Pulse Multisine Characterisation, it is concluded that the changes in cell characteristics are most likely caused by cracking of the electrode material caused by high electrical current pulses. With continued cycling, cells cycled with the HP-C are expected to show degradation at an increased rate due to raised temperatures, and more pronounced electrode cracking.

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Thermal Analysis of Fin Cooling Large Format Automotive Lithium-Ion Pouch Cells

Cited by 3 publications

References 27 publications

Unballanced Performance of Parallel Connected Large Format Lithium Ion Batteries for Electric Vehicle Application

Unballanced Performance of Parallel Connected Large Format Lithium Ion Batteries for Electric Vehicle Application

A comparative study of thermo‐physical properties of different nanofluids for effective heat transfer leading to Li‐ion battery pack cooling

Duty-cycle characterisation of large-format automotive lithium ion pouch cells for high performance vehicle applications

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