BATTERY MODULE ASSEMBLY AND ASSEMBLING METHOD THEREOF

A battery module assembly with a plurality of unit modules stacked therein is provided. Each of the plurality of unit modules includes a cartridge including a cooling pin having a plate shape and two pouch type battery cells mounted on each of both side surfaces of the cooling pin with the cartridge therebetween. A partition having a tetragonal frame shape and including an internal empty space is disposed between adjacent unit modules among the plurality of unit modules.