2021
DOI: 10.1002/ente.202000915
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Impact of the Level of Homogenization in 3D Thermal Simulation on the Internal Temperature Distribution of Li‐Ion Battery Cells

Abstract: Temperature is an important factor for an optimal battery performance. To gain knowledge about the internal temperature distribution in a battery, many thermal simulation studies are performed. Among other factors, they differ in the level of homogenization (LoH) of the geometry, which directly influences the computing time. However, the effects of different LoH, in particular of the cell layers, on the modeling and prediction quality of the temperature field are scarcely investigated. This work discusses the … Show more

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Cited by 5 publications
(4 citation statements)
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References 24 publications
(42 reference statements)
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“…The cells, that were originally at a lower temperature and changed to a higher temperature at the beginning of charge, showed the strongest depositions in the center of the jelly roll, in the center of the sheet. This is exactly where cells are known to increase in temperature due the interplay of heat generation and limited conduction [41] . Especially, if the temperature is low, the heat generation will be high due to higher irreversible losses caused by increased resistances [42] …”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…The cells, that were originally at a lower temperature and changed to a higher temperature at the beginning of charge, showed the strongest depositions in the center of the jelly roll, in the center of the sheet. This is exactly where cells are known to increase in temperature due the interplay of heat generation and limited conduction [41] . Especially, if the temperature is low, the heat generation will be high due to higher irreversible losses caused by increased resistances [42] …”
Section: Discussionmentioning
confidence: 99%
“…This is exactly where cells are known to increase in temperature due the interplay of heat generation and limited conduction. [41] Especially, if the temperature is low, the heat generation will be high due to higher irreversible losses caused by increased resistances. [42] Further, the cell that started charging at a higher temperature and changed to a lower one, showed depositions mostly in the bends of the jelly roll and at the electrode edge opposing the tabs.…”
Section: Anode Peak Flatmentioning
confidence: 99%
“…Further model simplification includes the utilization of symmetries and dimensionality reduction of critical system properties [36]. Additionally, homogenization of heterogenous domains and properties is widely used [37].…”
Section: Numerical Setupmentioning
confidence: 99%
“…As the measurement of the temperature within the cells still poses a great challenge and the effects of inline measurement devices on the electrical cell behavior are not yet fully understood, [14,15] modeling is crucial to estimate the core temperature of the cells. However, those models are based on a lot of assumptions like the homogenization of the transport properties of the whole battery stack [16][17][18] and the neglection of contact resistances. Moreover, they are difficult to validate [15] and DOI: 10.1002/ente.202300259…”
Section: Introductionmentioning
confidence: 99%