Abstract: An air-cooled battery pack is provided, including a plurality of battery modules; a pack case including an air inlet and an air outlet and provided to accommodate the plurality of battery modules; a cooling channel formed between the plurality of battery modules and a bottom surface of the pack case; an inlet duct module configured to form an air passage from the air inlet to the cooling channel; and an outlet duct module including at least one exhaust fan installed within the pack case and provided to forcedly exhaust air to outside of the pack case by forming an air passage from the cooling channel to the air outlet.

Abstract: The present disclosure provides a battery pack comprising: a module assembly having a structure in which a plurality of battery modules is mounted on a cooling plate having an internal hollow structure capable of accommodating a fluid; a pack housing having an inwardly recessed seating portion for mounting of the module assembly, and having an opened upper end; and a coolant circulation system configured to supply a liquid coolant into an internal hollow of the cooling plate to absorb heat of the battery module mounted on the cooling plate, wherein the pack housing includes a drain hose to discharge the liquid coolant that flows out from the coolant circulation system to the outside of the pack housing, and an opening through which the drain hose is mounted is formed on one surface of the pack housing.

Abstract: The present disclosure provides a battery pack comprising: a module assembly having a structure in which a plurality of battery modules is mounted on a cooling plate having an internal hollow structure capable of accommodating a fluid; a pack housing having an inwardly recessed seating portion for mounting of the module assembly, and having an opened upper end; and a coolant circulation system configured to supply a liquid coolant into an internal hollow of the cooling plate to absorb heat of the battery module mounted on the cooling plate, wherein the pack housing includes a drain hose to discharge the liquid coolant that flows out from the coolant circulation system to the outside of the pack housing, and an opening through which the drain hose is mounted is formed on one surface of the pack housing.