Hello,
Looks like busbars and tabs are combined under the passive components. Check out this excerpt from the latest version of the Fluent user's guide:"Battery cells are modeled as active zones; and battery tabs and busbars are modeled as passive zones. "
For more information, visit here: 27.2. Using the MSMD-Based Battery Models (ansys.com)
If you are not able to access the link, please refer to this forum discussion: Using Help with links (ansys.com)
Thanks!
Nikhil