Battery pack including foam kit assembly, and manufacturing method therefor

A battery pack, comprising:

• a battery pack case having an inner space;
• a plurality of battery cells accommodated in the inner space of the battery pack case, arranged in a horizontal direction, and each extending in a vertical direction;
• a foam kit assembly accommodated in the inner space of the battery pack case so that the foam kit assembly is disposed on the plurality of battery cells and isolated from an outside;
• and
• foam discharged from the foam kit assembly and filled between an inner surface of the battery pack case and the foam kit assembly,
• wherein the foam kit assembly comprises:
• a support frame extending in the horizontal direction and having at least one opening for allowing liquid foam to pass therethrough in the vertical direction;
• a foam kit seated on the support frame to contact a top cover of the battery pack case and be pressed by the top cover and having an accommodation space formed therein for accommodating the liquid foam;
• and
• a pressing needle protruding from the support frame to penetrate the foam kit,
• wherein the foam is formed by allowing the liquid foam to flow downward from the accommodation space of the foam kit through a through-hole of the foam kit, which is defined by the pressing needle, to form the foam on a bottom surface of a housing of the battery pack case.