Traction battery pack thermal management assembly

A traction battery pack assembly, comprising:

• an enclosure assembly that provides an interior area;
• a cell stack within the interior area, the cell stack having a plurality of battery cells disposed along a cell stack axis;
• a thermal management assembly disposed along the cell stack axis, the thermal management assembly including a plurality of thermal blockers secured to a base assembly, the base assembly including a sandwiched region and at least one projecting region, the sandwiched region disposed along the cell stack axis and sandwiched between first and second battery cells, the at least one projecting region outboard of the sandwiched region relative to the cell stack axis, the plurality of thermal blockers secured to the at least one projecting region of the base assembly;
• and
• an adhesive tape that secures the plurality of thermal blockers to the at least one projecting region of the base assembly, wherein the base assembly includes a thermal barrier, the adhesive tape including a first piece of tape on a first axial side of the thermal barrier, and a second piece of tape on an opposite, second axial side of the thermal barrier.