Battery module, battery pack including the same and method of manufacturing battery module

A battery module includes a battery cell stack that is formed by stacking a plurality of battery cells along a first direction, an insulating cover that covers both end parts of the battery cell stack, a holding member that wraps both end parts of the battery cell stack adjacent to the insulating cover, and a first electrode lead and a second electrode lead that protrude from each of a first battery cell and a second battery cell adjacent to each other included in the battery cell stack, the first electrode lead and the second electrode lead are bent in different directions from each other, and the first electrode lead and the second electrode lead overlap with each other to form a welding part and an extra space between the welding part and the battery cell stack.