BATTERY PACK, BATTERY SYSTEM INCLUDING THE SAME, AND BATTERY PACK MANUFACTURING METHOD

A battery pack includes a cell assembly including a first cell array and a second cell array, respectively including a plurality of battery cells arranged in a row, a pack housing accommodating the cell assembly, a pack cover covering the cell assembly, and an insulating member disposed to contact a side surface of the battery cell between the first cell array and the second cell array, wherein the insulating member is separated from the pack housing.