Battery module and battery pack including the same

1 . A battery module comprising:

a battery cell stack in which a plurality of battery cells are stacked;

a first frame member accommodating the battery cell stack and having an open upper portion;

a second frame member covering the upper portion of the first frame member;

a connection portion coupling the first frame member and the second frame member to each other; and

an insulating sheet disposed between the battery cell stack and the second frame member,

wherein an extension at an edge of the insulating sheet has a first section extending downward toward the battery cell stack and a second section extending outward from an end of the first section toward the first frame member,

wherein the connection portion includes at least one protrusion extending downward from the second frame member, and

wherein the second section of the extension of the insulating sheet extends under the at least one protrusion.

2 . The battery module of claim 1 , wherein the first frame member is a U-shaped frame,

wherein the second frame member is an upper plate,

wherein the U-shaped frame includes a bottom portion and two side portions connected by the bottom portion and facing each other, and

wherein the connection portion is disposed where an upper edge of a first side portion of the two side portions and an edge of the upper plate meet.

3 . The battery module of claim 2 , wherein the connection portion includes a plurality of rivets.

4 . The battery module of claim 3 , wherein the connection portion includes:

a plurality of first rivet holes adjacent to the upper edge of the first side; portion,

wherein the at least one protrusion is a plurality of protrusions protruding from the edge of the upper plate toward the U-shaped frame and including a plurality of second rivet holes formed to correspond to the plurality of first rivet holes, and

wherein each of the plurality of rivets passes through one of the plurality of first rivet holes and one of the plurality of second rivet holes.

5 . The battery module of claim 2 , wherein the connection portion includes a plurality of hooks extending from the edge of the upper plate.

6 . The battery module of claim 5 , wherein the connection portion includes a plurality of coupling holes adjacent to the upper edge of the first side portion, and

wherein the plurality of hooks are coupled to the plurality of coupling holes, respectively.

7 . The battery module of claim 1 , wherein the extension extends past the battery cell stack to a region in which the connection portion is located.

8 . The battery module of claim 7 , wherein the extension is formed to be bent toward the battery cell stack.

9 . The battery module of claim 2 , further comprising a buffer pad disposed between the first side portion and the battery cell stack.

10 . The battery module of claim 9 , wherein an upper end portion of the buffer pad contacts the insulating sheet.

11 . A battery pack including the battery module according to claim 1 .

12 . The battery module of claim 1 , wherein the extension of the insulating sheet is L-shaped.

13 . The battery module of claim 1 , further comprising a buffer pad disposed between the first frame member and the battery cell stack,

wherein the first section and the second section are directly over the buffer pad.