BATTERY PACK

A battery pack (1, 1') includes one or more battery modules (10, 10') including a cell stack (100, 100') including a plurality of battery cells (1000, 1000') stacked in a first direction, and a side cover (400) opposing the cell stack (100, 100') in the first direction; and a support frame (22) opposing the one or more battery modules (10, 10') in the first direction, wherein the side cover (400) includes a first inclined surface (421a) opposing the support frame (22) and inclined with respect to the first direction.