Learning Forum

[canderous]

I'm working on a project of the thermal management of lithium ion battery packs, where in this case I have modelled a section of a pack inspired by the tesla battery packs. Shown below are the cylindrical cells with a serpentine liquid cooling loop flowing in between the cells, which is the fluid domain.

For now a default mesh layout is used, with 327,000 elements, and I had to delete the default contact regions due them having issues with overlapping. Instead I made named selections of each cell face, and the section of the fluid that it comes in to contact with, which I mapped together in Fluent using the mesh interfaces, making sure the walls are coupled (I followed the methodology from this video https://youtu.be/BEzhDIR_zOY).

In Fluent, I set it to a transient system, energy equation is turned on, 2 eqn k - epsilon is used. In the past I have attempted to use the MSMD battery model, which worked for a single cell, but I found great difficulty in getting this to work for a battery pack, so instead for now I have used the "patch" button in initialisation to set what I presume to be the INITIAL temperature of the cells (although I'm likely wrong about this considering it's not working) to 350K, just as constant temperature for the battery cell bodies for simplicity. I set a mass flow inlet for the cooling loop, with a temperature of 290K, this is the only thing I changed in the boundary conditions tab.

As can be seen from the temp contour, no heat transfer is actually happening, the liquid is not being heated up and the cells are not being cooled, what am I missing and how do I fix this?

Any help is appreciated, I hope I've given enough relevant info although please tell me if more is needed. Thanks!

[Rahul Kumar]

Hello,
I would suggest you check the mesh interface setup again and make sure they are setup right. Usually, the interface not being setup properly could be one of the main reasons for this error.
Another suggestion, is make sure the setup of battery modeling is right. You can follow this tutorial : Chapter 28: Simulating a 1P3S Battery Pack Using the Battery Model (ansys.com)

[Tahreem57]

Hello, i liked your work and i am also working on battery thermal management too so can you please share resources or any files which could be helpful for me to do BTMS simulation?

[Arman Burkitbayev]

if you did not use MSMD model in battery pack, then how did you model battery?

[THEJAS J]

Hello, I'm very much interested on your work, could you please share any resources or files which could be helpful for me to understand more about BTMS simulation?