Learning Forum

[hamed.heidari]

Hello,

I have created a 3D Li-ion single-cell battery model in ANSYS Fluent, and I am simulating the temperature distribution during a constant current (CC) discharge process. The model matches my experimental data quite well in terms of voltage response and overall temperature change over time.

However, I have encountered a discrepancy in the temperature distribution. In my experiments, the highest temperature is observed near the tabs. But in the simulation—under adiabatic boundary conditions—the hottest region appears near the bottom of the cell.

I have reviewed the ANSYS documentation (specifically this tutorial:
ANSYS Battery Tutorial), and it also shows the hottest area near the bottom and the coolest near the tabs.

I have double-checked all settings, including enabling Joule heating, but the reported Joule heating value remains zero throughout the simulation. This seems suspicious and may explain the mismatch.

Could you please advise if there is something I might be missing or doing incorrectly with respect to Joule heating or other relevant setup parameters?

Thank you in advance for your support.