TECHNOLOGY FOCUS - ELECTRONICS - Preferred Device: In the Battery module (400), the laminate sheet is constructed in a structure including a thermally weldable inner resin layer, a blocking metal layer, and a durable outer resin layer. Each of the battery cells is mounted in a frame-type battery cartridge (200). The cartridge includes at least one pair of plate-shaped frames for fixing edges of each of the battery cells in a state in which at least one side of each of the battery cells is exposed, and each of the frames is provided at the outer surface with elastically pressing members for fixing the corresponding heat dissipation member to the exposed side of each of the battery cells in a tight contact fashion. The elastically pressing members are mounted to upper and lower sides and/or left and right sides of the outer surface of each of the frames. Each of the battery cells is mounted to the frames in a state in which the exposed side of each of the battery cells protrudes from the corresponding frame, and the elastically pressing members are mounted to the outer surfaces of the frames with a height greater than a protruding height of the exposed side of each of the battery cells. The elastically pressing members are made of a polymer material providing an elastically pressing force when the polymer material is pressed. Each of the frames is provided at the outer surface with grooves, and the elastically pressing members are in the respective grooves. Each of the heat dissipation members is a metal plate exhibiting high thermal conductivity. The heat exchange member (600) is made of a metal material exhibiting high thermal conductivity. The heat dissipation members are disposed at the interfaces between the battery cells in a state in which at least a portion of each of the heat dissipation members is exposed outside the stacked battery cells, and the exposed portions are bent toward the corresponding sides of the battery cells. The heat exchange member (600) is mounted to the tops of the bent portions of the heat dissipation members. The heat exchange member (600) is provided with one or more coolant channels for allowing a coolant to flow. The heat exchange member (600) is constructed in a structure including a base to the bottom of which the heat dissipation members are tightly connected, opposite sides connected to the base, the opposite sides having the coolant channels formed in the longitudinal direction, and heat dissipation fins extending upward from the base between the opposite sides. The heat exchange member (600) is mounted on the upper end of the module case (410). The module case (410) is provided at the upper end with a depression having a size sufficient to receive the heat exchange member (600), and the heat exchange member (600) mounted in the depression has a height equal to or less than that of the upper end of the module case (410).