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.