Battery module

Patent metadata

Field	Value
Publication number	US-12308405-B2
Application number	US-202318324169-A
Country	US
Kind code	B2
Filing date	May 26, 2023
Priority date	Jun 7, 2022
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A battery module is disclosed. In some implementations, the battery module includes: a housing having an internal space, a cell stack in which a plurality of battery cells and a first heat blocking member blocking heat propagation between the plurality of battery cells are stacked, and a second heat blocking member disposed between the cell stack and the housing, wherein at least a portion of the first heat blocking member is in contact with the second heat blocking member.

First claim

What is claimed is:

1. A battery module comprising:
a housing having an internal space;
a cell stack includes a plurality of battery cells accommodated in the internal space and stacked in a first direction, the cell stack includes a first side where lead tabs of the plurality of battery cells are disposed, a second side facing the first direction, and an upper side and a lower side opposing each other in a second direction perpendicular to the first direction;
a first heat blocking member disposed between the plurality of battery cells, the first heat blocking member is configured to block heat propagation between the plurality of battery cells; and
a second heat blocking member extending between (a) the housing and (b) at least one of the upper side or the lower side of the cell stack,
wherein at least a portion of the first heat blocking member is inserted into the second heat blocking member.

2. The battery module of claim 1 , wherein
the plurality of battery cells and the first heat blocking member are stacked in the first direction, and
the second heat blocking member faces the cell stack in the second direction.

3. The battery module of claim 2 , wherein at least a portion of the first heat blocking member protrudes in the second direction.

4. The battery module of claim 1 , further comprising:
at least one busbar electrically connected to the plurality of battery cells; and
a first frame disposed between the lead tabs and the housing and supporting the at least one busbar,
wherein the first heat blocking member includes an insertion portion protruding toward the first frame, and the insertion portion is inserted into the first frame.

5. The battery module of claim 2 , wherein the second heat blocking member is configured to press at least a portion of the first heat blocking member in the second direction.

6. The battery module of claim 2 , further comprising:
at least one busbar electrically connected to the plurality of battery cells and faces the front side of the cell stack in the second direction; and
a busbar flame including a first frame disposed to support the at least one busbar and a second frame connected to the first frame and disposed between the housing and the front side of the cell stack,
wherein the first frame is disposed to face the cell stack in a third direction, perpendicular to both the first and the second direction, and
wherein the second frame is disposed to face the cell stack in the second direction.

7. The battery module of claim 6 ,
wherein at least the portion of the first heat blocking member protrudes toward the second frame to be inserted into the second heat blocking member.

8. The battery module of claim 1 , wherein the second heat blocking member includes ceramic wool, and the second frame includes a thermoplastic resin.

9. The battery module of claim 6 , wherein the second frame has a plate-like shape covering a surface of the second heat blocking member facing the housing.

10. The battery module of claim 1 , wherein the housing includes a venting hole configured to allow gas occurring in the cell stack to be discharged therethrough.

11. The battery module of claim 10 , further comprising:
at least one busbar electrically connected to the plurality of battery cells; and
a busbar frame including a first frame disposed to support the at least one busbar and a second frame connected to the first frame and disposed between the housing and the front side of the cell stack,
wherein the busbar frame includes a venting gap disposed between the first frame and the second frame and configured to allow gas occurring in the cell stack to pass therethrough, and
the venting hole faces the venting gap.

12. The battery module of claim 1 , wherein
the first heat blocking member includes:
a heat insulating member configured to block heat propagation between adjacent battery cells; and
one or more compression members facing the heat insulating member and configured to be elastically deformed.

13. The battery module of claim 12 , wherein the heat insulating member includes a protrusion protruding in a direction toward the second heat blocking member.

14. The battery module of claim 13 , wherein the protrusion of the heat insulating member is inserted into the second heat blocking member.

15. The battery module of claim 12 , wherein the heat insulating member includes at least one of mica, silica, graphite, silicate, ceramic wool, or aerogel.

16. The battery module of claim 12 , wherein the one or more compression members are coupled to one surface of the heat blocking member and the other surface of the heat blocking member opposite to the one surface of the heat insulating member, respectively.

Assignees

• Sk On Co Ltd

Inventors

• Lee Eung Ho
• An Sang Tae
• An Hyo Seong
• Jang Ho Seong

Classifications

• H01M10/0481

  Compression means other than compression means for stacks of electrodes and separators · CPC title

• H01M50/505

  comprising a single busbar · CPC title

• H01M50/30

  Arrangements for facilitating escape of gases · CPC title

• H01M50/502

  Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing · CPC title

• H01M50/211

  adapted for pouch cells · CPC title