Phase Change Material (PCM) for Thermal Management of 8 Cell Lithium-Ion Battery Pack

[@l7a9111]

Thanks for the video. Is there an option in CFD POST to visualise solidification and melting ?

[@FrontiersInCFD]

No such as of now

[@anshul4365]

Sir why we don't use msmd battery model

[@FrontiersInCFD]

MSMD Model involves the chemistry of cell as well, simulation uploaded are based on heat carried away by fluid

[@anshul4365]

@@FrontiersInCFD sir please upload simulation using msmd of 4 cells and pcm Sir it will be very helpful if you upload this as this is my project and I am unable to use msmd

[@L兆泓]

Thanks for sharing. I have some questions, 1. Why don't you use volume average for reporting the result? 2. I've followed all the steps in video, got the similar result, but as I add new plane to see in to the cross section in interior of the cell, I found that there is only heat transfer on the surface, but in the interior zone, there is no heat transfer.

[@FrontiersInCFD]

This can be done in result section

[@thatlive]

Hi. How can I access pcm solid and liquid information and how can I export report file files to excel?

[@FrontiersInCFD]

open folder-open given file-dp0-then FFF- then Fluent --sear report def file --open with nothpad --transform to excel

[@thatlive]

@FrontiersInCFD thanks

[@rajatsingh9080]

Can u analyse pcm with liquid cooling for battery thermal management system?

[@FrontiersInCFD]

Share reference paper

[@HariHaran-uf3kh]

what is the c-rating of the cells?

[@FrontiersInCFD]

The C-rate is often used to describe battery loads or battery discharging currents. 1 C-rate denotes the current rate at which a battery can be discharged in 1 hour

[@emrysdruid143]

Thank you Frontier. I have a small doubt. When you specified the HTC in pcm, is it for heat transfer between cell wall and pcm ??? or it is within PCM?? or it is between and outside atmosphere?.......i guess the 3rd one. is it?

[@FrontiersInCFD]

Wall and pcm

[@emrysdruid143]

@@FrontiersInCFDok....then what is the meaning of free stream temperature there in dialog box bcz there is no free stream motion .

[@FrontiersInCFD]

Solidification to melting occurs with pcm fraction of it converted into liquid

[@raksitsharma3300]

can you share the research paper you used for the video?

[@FrontiersInCFD]

Received geometry conditions as project

[@engineerbyprofession]

Which research paper you used for this simulation

[@FrontiersInCFD]

Received as requirement from client

[@engineerbyprofession]

​@@FrontiersInCFD any video for validation purpose available on your channel except single cell

[@KundanKumar-rv8gq]

Sir I have one doubt when I am setting heat generation at 4c , then before 900 sec temperature approache to around 1000 degrees centigrade but when I am Same simulation on 3C , I m getting validation result

[@FrontiersInCFD]

Higher c rate means higher heat generation per unit volume check the boundary condition or else use as source term

[@l7a9111]

i am getting temperature of above 500 celcius at cell and pcm. wondering what input wrong?

[@FrontiersInCFD]

There is something wrong in boundary conditions

[@l7a9111]

I've put source term/heat generation rate (W/m3) as 45470. Rest all seems fine. I ran the same geometry and mesh with air as medium instead of PCM, it went fine.

[@l7a9111]

@@FrontiersInCFD I'm getting 500 Celsius at first and slowly declining as run more timesteps

[@FrontiersInCFD]

change time step size

[@l7a9111]

​​As in number of iterations per time step?​ Currently it's 20@@FrontiersInCFD and time step size is 1 sec

[@Will-d8u]

Excuse me，when I replicated your case, the liquid fraction rapidly increased from 0.05 to 1 at 70 seconds of calculation, which is why. However, the phase-change material temperature is much higher than 304K.Why？

[@FrontiersInCFD]

Check with mesh size make it finer

[@Will-d8u]

@@FrontiersInCFD Excuse me,the improved mesh mass is 0.89, but similar problems still appear. When the calculation reaches 45s, the temperature of the phase change material rapidly rises to 1400K, and the liquid fraction rapidly rises from 0.005 to 1.0. I am very confused, why does the battery temperature of 304K cause the temperature of the phase change material to reach 1400K.

[@FrontiersInCFD]

I need to check the file as there may be issue with some input parameter

[@Will-d8u]

@@FrontiersInCFD Can you tell me what went wrong?Thank you

[@thatlive]

thank you

[@FrontiersInCFD]

Welcome!

[@bharathvislavath4414]

what should be the boundary conditions if air has to pass over the battery pack (IP67 Battery pack)? Anybody please

[@FrontiersInCFD]

select air as working fluid during material selection define the fluid zone for air

[@johnhuy1554]

Exceuse me, i did my assigment it's quite the familiar to ur project but it's cooling the battery bt pcm w 2 concepts air and water, when i tried to setup boundary condition the same as video but i couldnot get the same reslut like the liquid fraction, the line was not rise up, anybody can help me please

[@FrontiersInCFD]

Check if you have defined solid and fluid zone. As well as check for the contact region properly selected

[@shreeharshaprasad1017]

Thank you so much!!

[@FrontiersInCFD]

You're welcome!

[@pahadihaibawa]

Sir please provide the reference paper of this simulation 🙏

[@FrontiersInCFD]

not a reference paper, received parameter for simulation

[@pahadihaibawa]

Is there any research paper whose geometry is related to this?? Share if any

[@apoorvtripathi6348]

Boss we selected the heat transfer coefficient in pcm but what about the contact region???? Because we only specified the material in the contact region(all 8) but we didn't specify the heat transfer coefficient!!! Why?

[@FrontiersInCFD]

you can apply the boundary conditions if you see (pcm contact region trg)

[@charlieputh8330]

how about the result step 😢😢

[@FrontiersInCFD]

Specify Contours of temp volume rendering and velocity you can change to other parameter as well

[@emrysdruid143]

In orevious video of yours on the same topic (kzbin.info/www/bejne/enmrn36Klt5oe8U&ab_channel=FrontiersInCFD) you did not mention the n-octa as solid, but here you mentioned both solid and liquid both. Can you please explain why so?....and what difference according to you it will create? which one is more accurate?

[@FrontiersInCFD]

Defining both is more accurate to do so as the wall bounday conditions are represented by solids. If you know the properties of each and every material specify all for more accurate solution

[@prateeknegi060]

What if we want to do it with hot water, where water is outside and pcm is within the water body like pcm cylinders are inside the water tank? Can we proceed in the same manner?

[@engineerbyprofession]

Which research paper you used for this simulation