CN-122000563-A - Battery module

Abstract

The battery module includes battery cells, a case in which the battery cells are arranged in a row, a connector electrically connected to the battery cells, and a rupture prevention part on and protruding from the battery cells to prevent fatigue damage due to a swelling phenomenon. In the battery module according to the present invention, the rupture prevention part formed on the battery cell protrudes toward the case. Due to the swelling phenomenon, the battery cell is deformed in a direction opposite to the protruding direction of the rupture preventing part. Accordingly, fatigue failure of the battery cell itself can be prevented.

Inventors

• Ji Xiaogen

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260508

Application Date

20251105

Priority Date

20241107

Claims (20)

1. 1. A battery module, comprising: A battery cell; a case in which the battery cells are arranged in a row; a connector electrically connected to the battery cell, and And a rupture prevention part on and protruding from the battery cell to prevent fatigue failure due to a swelling phenomenon.
2. 2. The battery module of claim 1, wherein the battery cell comprises: A case having an open upper side, and one or more electrode assemblies including a positive electrode and a negative electrode being accommodated in the case; a cap covering the open area of the shell, and A terminal assembled to the cap, connected to the electrode assembly, and connected to the connector.
3. 3. The battery module of claim 2, wherein the case comprises: A rectangular lower surface; A pair of long side surfaces extending upward from the long sides of the lower surface to face each other, and A pair of short side surfaces extending upward from short sides of the lower surface to face each other, and connected to the pair of long side surfaces.
4. 4. The battery module according to claim 2, wherein the breakage preventing portion is at an upper portion of the case.
5. 5. The battery module according to claim 4, wherein the breakage preventing portion protrudes toward the case.
6. 6. The battery module according to claim 5, wherein the protruding length of the rupture preventing part increases from the center part of the case to the edge of the case.
7. 7. The battery module according to claim 5, wherein the protrusion length of the rupture prevention part is smaller than the length of the case that is deformable due to the swelling phenomenon.
8. 8. The battery module of claim 1, further comprising spacers between the battery cells to maintain a gap between the battery cells.
9. 9. The battery module of claim 8, wherein the separator is between a pair of adjacent battery cells among the battery cells arranged in a row.
10. 10. The battery module of claim 9, wherein the separator comprises: a cap mounting part mounted on the upper side of the battery cell, and And a cap insertion part extending from the cap seating part and inserted between the adjacent battery cells.
11. 11. The battery module of claim 10, wherein a width of the cap insertion part is proportional to a deformable length of the battery cell.
12. 12. The battery module of claim 8, wherein the separator is integrally formed and disposed between adjacent battery cells.
13. 13. The battery module of claim 12, wherein the separator comprises: a cap seating part seated on an upper side of the battery cell; a cap insertion part extending from the cap seating part and inserted between the adjacent battery cells, and And a cap connecting part connected with the cap setting part.
14. 14. The battery module of claim 8, wherein the separator is connected to the connector.
15. 15. The battery module of claim 14, wherein the separator comprises: a cap seating part seated on an upper side of the battery cell; a cap insertion part extending from the cap seating part and inserted between adjacent battery cells, and A cap extension extending from the cap seating portion and connected to the connector.
16. 16. The battery module of claim 15, wherein the cap extension is movable along a guide hole of the connector.
17. 17. The battery module of claim 8, wherein the separator is integrally connected to the connector.
18. 18. The battery module of claim 17, wherein the separator comprises: a cap seating part seated on an upper side of the battery cell; a cap insertion part extending from the cap seating part and inserted between adjacent battery cells; A cap connecting part connecting the cap setting part, and A cap extension extending from the cap seating portion and connected to the connector.
19. 19. The battery module of claim 8, wherein the separator comprises a resin material.
20. 20. The battery module of claim 8, wherein the separator comprises an elastic material.

Description

Battery module Technical Field Aspects of embodiments of the present disclosure relate to a battery module. Background In general, with the rapid increase in demand for portable electronic products such as laptop computers, video cameras and portable telephones and the real start of commercialization of robots, electric vehicles, etc., research into high-performance secondary batteries capable of repeated charge and discharge is actively being conducted. Secondary batteries are widely used for power supply or energy storage not only in small-sized devices such as portable electronic devices but also in medium-to large-sized devices such as electric vehicles and Energy Storage Systems (ESS). In particular, in the case of middle-to large-sized devices, one battery module may be configured in a form in which a plurality of battery cells are electrically connected with each other to improve the output and capacity of the battery. The conventional battery module maintains durability by applying a certain level of surface pressure to the battery cells in a case structure mounted to surround the battery cells. However, in such a structure, when an swelling phenomenon in which the battery cell swells due to rapid charge, overcharge, overdischarge, short circuit, or high-temperature storage occurs, the pressure acting between the battery cell and the case may be continuously increased to accelerate the deterioration of the battery cell. The above information disclosed in the background of the present disclosure is provided to enhance understanding of the background of the present disclosure and may include information that does not constitute a related art. Disclosure of Invention According to an aspect of embodiments of the present invention, there is provided a battery module for preventing (preventing or substantially preventing) safety accidents and extending the life of products by preventing (preventing or substantially preventing) damage to battery cells caused by deformation due to an expansion phenomenon. However, aspects of the present disclosure and technical problems to be solved are not limited to the above aspects and problems to be solved, and other aspects and problems to be solved, which are not mentioned, will be clearly understood by those skilled in the art from the description of the present invention disclosed below. According to one or more embodiments of the present invention, a battery module includes battery cells, a case in which the battery cells are arranged in a row, a connector electrically connected to the battery cells, and a rupture prevention part on and protruding from the battery cells to prevent fatigue damage due to a swelling phenomenon. The battery cell may include a case having an open upper side and containing one or more electrode assemblies including positive and negative electrodes therein, a cap covering an open area of the case, and a terminal assembled to the cap, connected to the electrode assemblies, and connected to a connector. The case may include a rectangular lower surface, a pair of long side surfaces extending upward from long sides of the lower surface to face each other, and a pair of short side surfaces extending upward from short sides of the lower surface to face each other and connected to the pair of long side surfaces. The breakage preventing portion may be at an upper portion of the case. The breakage preventing portion may protrude toward the case. The protruding length of the breakage preventing portion may be increased from the center portion of the case to the edge of the case. The projected length of the rupture prevention part may be smaller than the length of the case which is deformable due to the swelling phenomenon. The battery module may further include a separator between the battery cells and maintaining a gap between the battery cells. The separator may be between a pair of adjacent battery cells among the battery cells arranged in a row. The separator may include a cap seating part seated on the upper side of the battery cell and a cap insertion part extending from the cap seating part and inserted between adjacent battery cells. The width of the cap insert may be proportional to the deformable length of the battery cell. The separator may be integrally formed and disposed between adjacent battery cells. The separator may include a cap seating part seated on an upper side of the battery cells, a cap insertion part extending from the cap seating part and inserted between adjacent battery cells, and a cap connection part connecting the cap seating parts. The spacer may be connected to the connector. The separator may include a cap seating part seated on an upper side of the battery cells, a cap insertion part extending from the cap seating part and inserted between adjacent battery cells, and a cap extension part extending from the cap seating part and connected to the connector. The cap extension may be movable along the guide bore of t