Battery module
A battery module includes: a battery cell having a cell vent; and a bus bar holder on the battery cell and having a module vent. The module vent having a flat first surface, a flat second surface opposite to the first surface and facing the battery cell, a vent hole extending between the first and second surfaces and facing the cell vent, and a plurality of bending guide grooves in a partial region of the first surface spaced apart from the vent hole.
1 . A battery module comprising:
a battery cell having a cell vent; and
a bus bar holder on the battery cell and having a module vent, the module vent having a flat first surface, a flat second surface opposite to the first surface and facing the battery cell, a vent hole extending between the first and second surfaces and facing the cell vent, and a plurality of bending guide grooves in a partial region of the first surface spaced apart from the vent hole.
2 . The battery module as claimed in claim 1 , wherein a size of the vent hole is smaller than a size of the cell vent.
3 . The battery module as claimed in claim 1 , wherein the plurality of bending guide grooves form a square line shape in which the respective sides are spaced apart from each other.
4 . The battery module as claimed in claim 1 , wherein the module vent has a plurality of rupture guide grooves in a partial region of the second surface.
5 . The battery module as claimed in claim 4 , wherein the rupture guide grooves radially extend along a diagonal direction with respect to the vent hole.
6 . The battery module as claimed in claim 4 , wherein the bending guide grooves and the rupture guide grooves do not overlap each other.
7 . The battery module as claimed in claim 4 , wherein the module vent satisfies the following equation:
0.01
mm
≤
T
1
≤
0.5
mm
wherein T 1 is a depth of the rupture guide grooves.
8 . The battery module as claimed in claim 1 , wherein the module vent satisfies the following equations:
L
2
≥
L
1
×
1
/
2
and
W
2
≥
W
1
×
1
/
2
wherein L 1 is a length of the cell vent, L 2 is a length of the vent hole, W 1 is a width of the cell vent, and W 2 is a width of the vent hole.
9 . The battery module as claimed in claim 1 , wherein the module vent satisfies the following equation:
2
.
5
≤
L
2
/
W
2
≤
2.8
wherein L 2 is a length of the vent hole, and W 2 is a width of the vent hole.
10 . The battery module as claimed in claim 1 , wherein the module vent satisfies the following equations:
L3≤L1 and W3≤W1
wherein L 1 is a length of the cell vent, L 3 is a distance between major axes of the bending guide grooves, W 1 is a width of the cell vent, and W 3 is a distance between minor axes of the bending guide grooves.
11 . The battery module as claimed in claim 1 , wherein the module vent satisfies the following equation:
T
3
×
1
/
2
≤
T
2
≤
T
3
×
3
/
4
wherein T 2 is a thickness between a bottom of the bending guide grooves and the second surface, and T 3 is a thickness between the first surface and the second surface.
12 . A battery module comprising:
a battery cell having a cell vent; and
a bus bar holder on the battery cell and having a module vent, the module vent having a flat first surface, a flat second surface opposite to the first surface facing the battery cell, a vent hole extending between the first and second surfaces and facing the cell vent, and a plurality of rupture guide grooves in a partial region of the second surface.
13 . The battery module as claimed in claim 12 , wherein the rupture guide grooves are radially arranged around the vent hole and extend in diagonal directions with respect to the vent hole.
14 . The battery module as claimed in claim 12 , wherein the module vent has a plurality of bending guide grooves in a partial region of the first surface spaced apart from the vent hole.
15 . The battery module as claimed in claim 14 , wherein the plurality of bending guide grooves form a square line shape in which the respective sides are spaced apart from each other.