I haven't work with ANSYS yet, but about COMSOL, as Ahmad mentioned you have different modules for analyzing different performances of battery including thermal and electrical performance. For analyzing the results also, COMSOL provides variety of options for extracting almost any parameters and variables including graphical outputs like 1D, 2D and 3D graphes, contours, streamline, even animations on almost any segment of your geometry like, surface, volume, edges , which is fairly easy to work with. In the following link, you can see some examples of COMSOL about analysis of battery performance:
You can use both software for your problem. But COMSOL is better than ANSYS software, it is user friendly software and if you are a new user then you should use COMSOL. You can easily find the solution.
I have worked with ABAQUS and COMSOL. In terms of integration of different physics or user defined PDEs, COMSOL is a much better option, but the solution accuracy becomes problem sometimes. At this stage, in some of the complicated physical phenomenons (like crack propagation etc.) ABAQUS (and I think ANSYS too) have more optimized solvers than COMSOL.
For your problem, it will be much easier to solve in COMSOL than ANSYS.