TRACTION BATTERY PACK ENCLOSURE BARRIER AND TRACTION BATTERY PACK ASSEMBLY METHOD

A traction battery pack assembly includes first and second cell stacks each disposed along a cell stack axis and an enclosure assembly that encloses an interior area. The enclosure assembly has an enclosure structure that holds the first and second cell stacks within a cell-receiving area. The enclosure structure compresses the first cell stack along the cell stack axis of the first cell stack. The enclosure structure compresses the second cell stack along the cell stack axis of the second cell stack. The assembly further includes divider positioned between the first and second cell stacks. The divider partitions the interior area.