Battery module

Patent metadata

Field	Value
Publication number	US-12489172-B2
Application number	US-202318491715-A
Country	US
Kind code	B2
Filing date	Oct 20, 2023
Priority date	Apr 4, 2023
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

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.

First claim

What is claimed is:

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.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Jae Min
• Choi Young Hyun
• Lee Jun Hee

Classifications

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M50/367

  Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems · CPC title