BATTERY PACK HAVING SUPERIOR COOLING EFFICIENCY

摘要

Provided is a battery pack including two or more rows of battery modules, comprising: battery cells or a plurality of unit modules having two or more battery cells embedded therein which are stacked in a vertical or horizontal manner; a coolant inlet and a coolant outlet which are respectively provided at the upper portion and the lower portion of a pack case so that a coolant for cooling the battery cells or a unit cell, which is a unit module, can flow from one side to the other side of the battery modules, in a direction which is perpendicular to the stacking direction of the unit cells; a flow space ("coolant inlet portion") spanning from the coolant inlet to the battery modules, and a flow space ("coolant outlet portion") spanning from the battery modules to the coolant outlet provided on each of the pack cases, wherein the coolant outlet is bent at at least 30 degrees in the side direction with respect to the flowing direction of the coolant that flows in from the coolant inlet.