Battery module

Patent metadata

Field	Value
Publication number	US-12230778-B2
Application number	US-202318457095-A
Country	US
Kind code	B2
Filing date	Aug 28, 2023
Priority date	Nov 25, 2022
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A battery module includes a housing that includes an internal space, a cell stack accommodated in the internal space and including a plurality of battery cells stacked in a first direction and a plurality of thermal blocking members disposed between battery cells in the plurality of battery cells, a plurality of electrically conductive members electrically connected to the plurality of battery cells, and a frame supporting the plurality of electrically conductive members. Each battery cell includes an electrode assembly and an electrode accommodating portion accommodating the electrode assembly. At least one of the thermal blocking members includes: a body portion configured to face the electrode accommodating portion and blocking heat propagation between the plurality of battery cells, and one or more blocking portions extending from the body portion in a second direction perpendicular to the first direction, and configured to at least partially block gas flow in the first direction.

First claim

What is claimed is:

1. A battery module comprising:
a housing including an internal space and a venting hole to allow gas to be discharged from the internal space;
a cell stack accommodated in the internal space and including a plurality of battery cells and a plurality of thermal blocking members that are stacked, wherein each of the plurality of the thermal blocking members is disposed between the plurality of battery cells;
a plurality of electrically conductive members electrically connected to the plurality of battery cells; and
a frame coupled to and structured to support the plurality of electrically conductive members and facing the plurality of battery cells,
wherein each of the plurality of battery cells includes an electrode assembly and an electrode accommodating portion accommodating the electrode assembly,
wherein at least one of the plurality of thermal blocking members disposed adjacent to one battery cell of the plurality of battery cells includes:
a body portion facing the electrode accommodating portion of the one battery cell; and
blocking portions extending from the body portion and disposed to at least partially block a gas flow,
wherein the blocking portions include a first blocking portion disposed on one side of the body portion,
wherein the first blocking portion includes:
a first end portion facing an inner surface of the frame;
a second end portion protruding further than the first end portion; and
a step portion connecting the first end portion to the second end portion,
wherein the step portion is disposed to overlap the venting hole.

2. The battery module of claim 1 , wherein the blocking portion includes an end portion that is adjacent to the frame.

3. The battery module of claim 1 , wherein the plurality of thermal blocking members includes a material that includes at least one of mica, ceramic wool, or aerogel.

4. The battery module of claim 1 , wherein the blocking portions further include:
a second blocking portion disposed on another side opposite to the one side of the body portion,
wherein the plurality of battery cells are stacked in a first direction.

5. The battery module of claim 4 , wherein the first blocking portion is disposed between the plurality of electrically conductive members in the first direction.

6. The battery module of claim 4 , wherein
the second end portion protrudes further in the second direction perpendicular to the first direction than the plurality of electrically conductive members.

7. The battery module of claim 6 , wherein the frame includes an insertion recess into which the second end portion of the blocking portion is inserted.

8. The battery module of claim 6 , wherein
the housing includes an upper case portion and a lower case portion configured to cover upper and lower portions of the cell stack, respectively,
wherein the venting hole is disposed on the upper case.

9. The battery module of claim 8 , further comprising a venting flow path formed in a space between the first end portion and the upper case portion.

10. The battery module of claim 4 , wherein the frame includes:
a first frame disposed on one side of the cell stack;
a second frame disposed on another side opposite to the one side of the cell stack; and
a connection frame connecting the first frame to the second frame.

11. The battery module of claim 10 , wherein the plurality of thermal blocking members include:
a first thermal blocking member in which the first blocking portion is inserted into the first frame; and
a second thermal blocking member in which the first blocking portion is inserted into the second frame.

12. The battery module of claim 11 , wherein the first thermal blocking member and the second thermal blocking member are alternately disposed in the first direction.

13. The battery module of claim 11 , wherein an end portion of the second blocking portion of the first thermal blocking member is adjacent to the second frame.

14. The battery module of claim 6 , further comprising:
a third thermal blocking member disposed between the frame and the first end portion and extending in the first direction.

15. The battery module of claim 14 , further comprising:
a fourth thermal blocking member facing the cell stack in a third direction perpendicular to both the first and second directions.

16. The battery module of claim 15 , wherein the third thermal blocking member and the fourth thermal blocking member are integrally formed.

17. The battery module of claim 1 ,
wherein the plurality of battery cells are stacked in a first direction,
wherein the first end portion and the second end portion are extending toward a second direction perpendicular to the first direction, and
wherein the first end portion and the second end portion are disposed along a third direction perpendicular both to the first direction and the second direction, and
wherein the step portion is disposed between the first end portion and the second end portion in the second direction.

18. The battery module of claim 17 ,
wherein the first end portion and the step portion form a first venting flow path through which the gas flows in the first direction.

19. The battery module of claim 17 ,
wherein the second end portion is configured to block the gas flow in the first direction and forms a second venting flow path through which the gas flows towards the first venting flow path.

20. The battery module of claim 1 ,
wherein the plurality of battery cells are stacked in a first direction, and the second end portion protrudes in a second direction perpendicular to the first direction, and
wherein the step portion and the venting hole are disposed to overlap each other in a third direction perpendicular to both the first direction and the second direction.

Assignees

• Sk On Co Ltd

Inventors

• Lee Eung Ho
• Kim Ho Yeon
• Lee Seung Dong
• Jeon Hae Ryong

Classifications

• H01M50/367

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

• H01M50/507

  comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M10/647

  Prismatic or flat cells, e.g. pouch cells · CPC title

• H01M50/503

  characterised by the shape of the interconnectors · CPC title