How to couple SIB basic DFN with a thermal model?

Hello,
I am a student and I want to simulate a Sodium-Ion Battery (SIB) using the sodium_ion.BasicDFN model. I want to couple it with a lumped thermal submodel, but it doesn’t work. I am quite sure it’s because of the missing implementation in the BasicDFN . There are far fewer variables in the basic model. However, I don’t know what to do or add to enhance the BasicDFN to get the thermal models to run. Or is it easier to create a thermal model on my own?
Thank you for your help! (bearbeitet)