BATTERY PACK AND BATTERY PACK ASSEMBLY APPARATUS

Disclosed is a battery pack including a housing unit configured to receive a battery cell therein, the housing unit comprising a first housing including a first contact surface and a second housing including a second contact surface opposite the first contact surface, wherein the first housing and the second housing are coupled by welding in a state in which the first contact surface and the second contact surface are in contact with each other and pressed against each other, a first support is provided on an outer surface of the first housing, the first support contacting a first pressing module that presses the first housing toward the second housing, and a second support is provided on an outer surface of the second housing, the second support contacting a second pressing module that presses the second housing toward the first housing.