Battery pack and method for manufacturing the same

A battery pack comprising:

• a battery module assembly including a plurality of battery modules;
• and
• a case in which the battery module assembly is seated,
• wherein:
• each battery module includes a laminated structure including a plurality of laminated battery cells and a cover disposed on a first side or a second side of the laminated structure and configured to cover the laminated structure,
• the cover includes a cover surface facing the laminated structure, and a first fastening part and a second fastening part, each the first and second fastening parts projecting in opposite directions and formed to project further than a side surface of the laminated structure from the cover surface in a direction in which the battery cells are laminated, and
• wherein in an arranged state, a first battery module and a second battery module of the plurality of battery modules are arranged adjacent to one another in the direction in which the battery cells are laminated, the first fastening part of the first battery module and the second fastening part of the second battery module overlap each other in a height direction and are mutually fastened.