Battery module and battery pack including the same
A battery module according to an embodiment of the present disclosure includes: a battery cell stack in which a plurality of battery cells are stacked, a busbar frame connected to the battery cell stack, a busbar disposed on the busbar frame, and an electrode lead extending from a battery cell of the battery cell stack and welded to the busbar, wherein the busbar includes at least one or more concave parts recessed toward the center of the busbar, and a protrusion part protruding in a direction opposite to the center of the busbar.
1 . A battery module comprising:
a battery cell stack;
a busbar frame connected to the battery cell stack;
a busbar disposed on the busbar frame; and
an electrode lead extending from a battery cell of the battery cell stack and welded to the busbar,
wherein the busbar comprises at least one concave part recessed toward the center of the busbar, and a protrusion part protruding in a direction opposite to a center of the busbar, and
wherein the at least one concave part includes two concave parts, the two concave parts being recessed in a direction facing each other, and the electrode lead is coupled to the busbar so as to wrap the two concave parts.
2 . The battery module of claim 1 , wherein:
the concave part comprises a first edge part defining one surface extending in a first direction, and a second edge part defining another surface extending in a second direction.
3 . The battery module of claim 2 , wherein:
a length of the first edge part is shorter than an overall length of the busbar extending in the first direction.
4 . The battery module of claim 2 , wherein:
a length of the second edge part is shorter than an overall length of the busbar extending in the second direction.
5 . The battery module of claim 2 , wherein:
the first edge part and the second edge part are perpendicular to each other.
6 . The battery module of claim 2 , wherein:
the protrusion part comprises a first protrusion part and a second protrusion part disposed on both sides of the concave part.
7 . The battery module of claim 5 , wherein:
the second edge part of the concave part forms a part of the protrusion part.
8 . The battery module of claim 2 , wherein:
the busbar has an H shape.
9 . The battery module of claim 1 , wherein:
the electrode lead includes a first electrode lead and a second electrode lead that wrap each of the two concave parts, and
the first electrode lead and the second electrode lead are bent in the concave part and make contact with one surface of the busbar.
10 . The battery module of claim 9 , wherein:
an end part of the first electrode lead and an end part of the second electrode lead are spaced apart from each other and make contact with one surface of the busbar.
11 . The battery module of claim 1 , wherein:
each of the battery cells comprises an electrode lead protruding toward the busbar frame, and two electrode leads protruding from battery cells adjacent to each other among the electrode leads pass between the plurality of busbars and make contact with one surface of the busbar.
12 . The battery module of claim 11 , wherein:
the two electrode leads comprises a first electrode lead and a second electrode lead, and
the first electrode lead and the second electrode lead each pass between the at least one concave part and make contact with one surface of the busbar.
13 . The battery module of claim 1 , wherein:
the concave part comprises a first edge part that defines one surface extending in a first direction, and
a width of the electrode lead is equal to or smaller than a length of the first edge part.
14 . The battery module of claim 1 , wherein:
a welding part is formed at a portion where the electrode lead and the busbar overlap.
15 . A battery pack comprising:
at least one battery module of claim 1 , and
a pack case for packaging the at least one battery module.