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

A battery module comprising:

• a battery cell stack that is formed by stacking a plurality of battery cells along a first direction, the battery cell stack including a first end part and a second end part;
• an insulating cover that covers the first end part and the second end part of the battery cell stack;
• a holding member that wraps the first end part and the second end part of the battery cell stack adjacent to the insulating cover;
• a first electrode lead protruding from a first battery cell included in the battery cell stack;
• and
• a second electrode lead protruding from a second battery cell adjacent to the first battery cell and included in the battery cell stack;
• wherein 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, thereby forming a welding part, and
• wherein an extra space is formed between the welding part and the battery cell stack.