BATTERY CELL ASSEMBLY AND BATTERY PACK COMPRISING SAME

Embodiments provide a battery pack. The battery pack includes a pack housing with a base plate including first cooling channels, a battery cell assembly on the pack housing, and a lid coupled to side walls and including second cooling channels, in which the battery cell assembly includes a plurality of battery cells arranged in a first direction parallel to a mounting surface of the base plate and a plurality of cooling fins between the plurality of battery cells, each of the plurality of cooling fins includes a contact part overlapping the plurality of battery cells in the first direction and a heat emission part connected to the contact part and facing the lid, and the contact part of each of the plurality of cooling fins includes a hollow.