A battery cell assembly is provided. The battery cell assembly includes a cooling fin having first and second plate portions and a first thermally conductive layer. The first and second plate portions are coupled to one another and extend longitudinally along a central axis. The first plate portion has a first thickness. The second plate portion has a second thickness greater than the first thickness. The first thermally conductive layer is disposed on a first outer surface of the first plate portion. The cooling fin thermally communicates with the cooling plate. The battery cell assembly further includes a first battery cell disposed against the first thermally conductive layer and the second plate portion of the cooling fin.