Logical Cell, Secondary Battery Module and Secondary Pack Including the Same

A secondary battery module comprising:

• a plurality of logical cells overlapping each other in a thickness direction of the logical cells;
• a circuit board welded to the plurality of logical cells at one side of each of the plurality of logical cells;
• and
• a cover member covering the circuit board at the one side of the plurality of logical cells,
• wherein each of the logical cells comprises:
• a pouch cell assembly in which a plurality of pouch cells are arranged in the thickness direction;
• a case in which the plurality of pouch cell assemblies are accommodated in a longitudinal direction, wherein opposite ends of the case are open;
• a side busbar frame assembly coupled to the pouch cell assembly at one side of the case;
• an end plate coupled to one side of the side busbar frame assembly, the end plate covering one of the open opposite ends of the case;
• a busbar disposed between the side busbar frame assembly and the end plate and electrically connected to the pouch cell assembly, the busbar exposed at an outside of the case;
• and
• a reinforcing plate disposed at one side of the end plate.

A logical cell comprising:

• a plurality of pouch cell assemblies each having a plurality of pouch cells arranged in a thickness direction of the pouch cells;
• a case in which the plurality of pouch cell assemblies are accommodated in a longitudinal direction, wherein opposite ends of the case are open;
• a center busbar frame assembly disposed between two groups of pouch cell assemblies of the plurality of pouch cell assemblies;
• and
• a center busbar disposed in the center busbar frame assembly, the center busbar electrically connecting the plurality of pouch cell assemblies to each other.

A secondary battery module comprising:

• a plurality of logical cells overlapping each other in a thickness direction of the logical cells;
• a circuit board welded to the plurality of logical cells at one side of each of the plurality of logical cells;
• and
• a cover member integrally coupled to the plurality of logical cells at one side of each of the plurality of logical cells to cover the circuit board,
• wherein each of the logical cells comprises:
• a pouch cell assembly in which a plurality of pouch cells are arranged in the thickness direction;
• a case in which the plurality of pouch cell assemblies are accommodated in a longitudinal direction, wherein opposite ends of the case are open;
• a center busbar frame assembly provided between the plurality of pouch cell assemblies;
• and
• a center busbar provided in the center busbar frame assembly to electrically connect the plurality of pouch cell assemblies to each other.