Battery module and battery pack including the same
The present disclosure relates to a battery module that secures the rigidity and simplifies the structure, and a battery pack including the same. The battery module according to one embodiment of the present disclosure includes a battery cell stack in which a plurality of battery cells are stacked; a lower frame for housing the battery cell stack; an upper plate for covering an upper surface of the battery cell stack; and an end plate for covering the front and rear surfaces of the battery cell stack, wherein module mounting portions are formed at both ends of the upper plate.
1 . A battery pack comprising:
a battery pack frame;
a battery module mounted to the battery pack frame; and
coupling members coupling the battery module to the battery pack frame,
wherein the battery module has:
a battery cell stack in which a plurality of battery cells are stacked, the battery cell stack having electrode leads connected to the plurality of battery cells extending therefrom in a longitudinal direction of the battery module;
a lower frame housing the battery cell stack therein, the lower frame including a bottom portion and first and second side surface portions extending from respective opposite sides of the bottom portion and covering entire side surfaces of the battery cell stack;
an upper plate covering an upper surface of the battery cell stack; and
first and second end plates covering front and rear surfaces of the battery cell stack, respectively, the electrode leads being adjacent to the first and second end plates,
wherein module mounting portions are formed at opposite ends of the upper plate, the opposite ends being spaced apart from one another in a lateral direction of the battery module perpendicular to the longitudinal direction,
wherein the upper plate has first and second protruding portions that each protrude in the lateral direction beyond outer surfaces of the respective first and second side surface portions of the lower frame, and the module mounting portions each have a hole structure and are formed in the first and second protruding portions at locations located beyond the outer surfaces of the respective first and second side surface portions in the lateral direction,
wherein the upper plate has a constant width in the lateral direction in which the first and second protruding portions protrude between the opposite ends of the upper plate at locations having the module mounting portions and at locations not having the module mounting portions,
wherein the coupling members are inserted into the module mounting portions having the hole structure to couple the upper plate to the battery pack frame, and
wherein the first and second protruding portions of the upper plate do not overlap the lower frame.
2 . The battery pack according to claim 1 , wherein first and second pluralities of the module mounting portions are formed along the respective first and second protruding portions of the upper plate.
3 . The battery pack according to claim 1 , wherein the bottom portion and the side surface portions of the lower frame together form a unitary structure, each side surface portion being bent relative to the bottom portion.
4 . The battery pack according to claim 1 , wherein a width of the upper plate is greater than a distance between inward-facing surfaces of the opposite side surface portions of the lower frame.
5 . The battery pack according to claim 1 , wherein each end plate is formed of an insulating member.
6 . The battery pack according to claim 5 , wherein each end plate is fixed to at least one of the lower frame or the upper plate by an adhesive.
7 . The battery pack according to claim 5 , wherein each end plate is coupled to at least one of the lower frame or the upper plate by a hook structure.