A battery pack includes a plurality of battery modules in a stacked arrangement. The plurality of battery modules includes a first battery module that includes: at least one battery cell including a cell lead; a cartridge on which the at least one battery cell is mounted; and a first cooling cover. The first cooling cover is coupled to the cartridge and covers the at least one battery cell. The cartridge includes: a seating portion on which the at least one battery cell is seated; and a pressing portion that is formed on the seating portion and that is configured to, based on an external force being applied to the seating portion, apply pressure to a first end of a second cooling cover of a second battery module that neighbors the first battery module in the stacked arrangement.