BATTERY PACK OF NOVEL AIR COOLING STRUCTURE

摘要

PURPOSE: An air cooling type battery pack with excellent flexibility of design is provided to enhance cooling efficiency and to suppress performance degradation of unit cells. CONSTITUTION: An air cooling type battery pack includes a battery pack(200). The battery pack includes unit cells(101). A plurality of unit cells comprise one battery module(100). Two or more battery modules comprise a pair of battery module groups(110) by being vertically arranged of the battery pack. A refrigerant inlet unit(121) is formed in the center of a pack case(150) as being positioned between each battery modules. Coolant discharge parts(131) are respectively formed at the top and the bottom of the pack case. The coolant flow between the coolant discharge part and the refrigerant inlet unit has a structure in which the coolants are discharged through each coolant discharge unit.