Battery module

A battery module comprising:

• a secondary battery comprising an electrode assembly including alternately stacked electrodes and separators, and a pouch type battery case having a cup part which accommodates the electrode assembly therein;
• a housing which comprises one or more openings and into which the secondary battery is inserted through one of the one or more openings;
• and
• a cooling unit disposed in the housing at one side of the secondary battery,
• wherein an upper case and a lower case of the battery case are integrated with each other to define a folding edge part at an area on a side of the secondary battery at which the upper case and the lower case are folded at an edge where the upper case and the lower case are connected, and
• the folding edge part of the secondary battery and the cup part of the battery case both directly contact the cooling unit,
• wherein the housing includes a pair of inner walls that face each other and extend from a periphery of one of the one or more openings, at least a pair of slots are disposed from an opening of the at least one opening at corresponding positions of a pair of inner walls of the housing that face each other in corresponding positions of the pair of inner walls, respectively, and wherein ends of the secondary battery are respectively disposed in the pair of slots.