Battery module and manufacturing method thereof

A battery module comprising:

• a battery cell stack in which a plurality of battery cells are stacked;
• a first busbar frame and second busbar frame formed respectively on front and rear surfaces of the battery cell stack;
• and a flexible printed circuit board connecting the first busbar frame to the second busbar frame, wherein the flexible printed circuit board includes a first flexible printed circuit board part and a second flexible printed circuit board part which is separate from the first flexible printed circuit board part, and the first flexible printed circuit board part and the second flexible printed circuit board part are electrically connected to each other via a connector, wherein the battery cell stack includes battery cell fixing parts for fixing the plurality of battery cells in a vertical direction at a center and both ends of the battery cell stack, and wherein the connector is located on one of the battery cell fixing parts.