What is it about?

This research develops a three-dimensional multiphysics battery thermal model at the cell level. The main goal is to simulate the cooling mechanism inside the unit cell battery pack. This is done by coupling heat transfer and computational fluid dynamics (CFD) physics. A lumped value of heat generation (HG) inside the battery cell is obtained from the isothermal calorimeter experiment. HG varies with the current rate and operating temperature. The model helps understand the thermal spatio-temporal behavior of Li-ion battery under different operating conditions.

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Why is it important?

This research develops a three-dimensional multiphysics battery thermal model at the cell level that can simulate the cooling mechanism inside the unit cell battery pack. This model uses heat transfer and computational fluid dynamics (CFD) physics to study the thermal spatiotemporal behavior of Li-ion batteries under different operating conditions. By using a lumped value of heat generation (HG), which varies with the current rate and operating temperature, it can estimate how much heat each battery cell produces. With this information about HG values for each cell, researchers can design better ways to control their temperatures during operation to prevent overheating or damage due to excessive heating. Overall, these findings are important for designing more efficient and reliable lithium-ion batteries with improved performance features such as longer lifespan or higher energy density per volume/weight ratio than current technologies.

Perspectives

A three-dimensional cell-level multiphysics battery thermal model that can represent the cooling mechanism inside the unit cell battery pack is developed by coupling heat transfer and computational fluid dynamics (CFD) physics and using lumped values for heat generation (HG) based on current rate and operating temperature. This model provides valuable insights into tracing thermal gradients inside unit battery cells using multiphysics analysis. By coupling heat transfer and computational fluid dynamics (CFD) physics and using lumped values for heat generation (HG) that depend on current rate and operating temperature, a three-dimensional cell level multiphysics battery thermal model is developed that can represent the cooling mechanism inside the unit cell battery pack. This model enables tracing thermal gradients inside unit battery cells using multiphysics analysis. The cooling mechanism inside the unit cell battery pack is represented by a three-dimensional cell-level multiphysics battery thermal model that is developed by coupling heat transfer and computational fluid dynamics (CFD) physics and using lumped values for heat generation (HG) based on current rate and operating temperature. This model helps trace thermal gradients inside unit battery cells using multiphysics analysis.

Dr. Mohammad Rezwan Khan
Aalborg Universitet

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This page is a summary of: Multiphysics based thermal modeling of a pouch lithium-ion battery cell for the development of pack level thermal management system, April 2016, Institute of Electrical & Electronics Engineers (IEEE),
DOI: 10.1109/ever.2016.7476442.
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