BATTERY PACK OF NOVEL AIR COOLING STRUCTURE

摘要

The present invention relates to a battery pack including chargeable/dischargeable battery cells or unit modules ("unit cells"), wherein a plurality of unit cells are used for forming one battery module,at least two battery modules are vertically arranged from the refrigerant inflow direction of a refrigerant inlet to the height direction of the battery pack (longitudinal direction) so as to form a pair of battery module groups, a floating space ("refrigerant inlet") provided from the refrigerant inlet to the battery module groups is formed at a center of a pack case and is located between the battery module groups, a floating space ("refrigerant outlet") provided from each battery module group to a refrigerant outlet is formed in an upper part and a lower part of the pack case, a refrigerant path between the refrigerant inlet and the refrigerant outlet has a structure for cooling the refrigerant received from the refrigerant inflow through each unit cell and discharging the refrigerant through the refrigerant outlet.