CN-122000637-A - Bus bar and battery pack

Abstract

The invention discloses a bus bar and a battery pack. The battery pack includes a case, a plurality of first battery cells each including a first positive electrode terminal and a first negative electrode terminal, a plurality of second battery cells each including a second positive electrode terminal and a second negative electrode terminal, a first bus bar connecting the first negative electrode terminals of the plurality of first battery cells, a second bus bar connecting the second positive electrode terminals of the plurality of second battery cells, and a third bus bar connecting the first positive electrode terminals of the first battery cells and the second negative electrode terminals of the second battery cells, at least one of the first bus bar, the second bus bar, and the third bus bar being deformable according to positions of the first battery cells and the second battery pack.

Inventors

• PU XIANGXUN

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260508

Application Date

20250930

Priority Date

20241108

Claims (20)

1. 1. A bus bar, comprising: a first parallel connection member, and A first parallel extending member extending from the first parallel connecting member in a first direction, Wherein the first parallel connection member includes a first parallel central plate, a first parallel web extending from the first parallel central plate parallel to a second direction intersecting the first direction, and a first connection adjustment member formed on the first parallel web to be adjustable in length in the second direction.
2. 2. The bus bar of claim 1, wherein the first connection adjustment member defines a U-shaped or V-shaped bend.
3. 3. The bus bar of claim 1, wherein the first parallel extending member comprises: a first parallel side plate connected to the first parallel connection member and arranged parallel to the first direction; a first parallel upper plate extending from the first parallel side plate and arranged to intersect the first parallel side plate, and And a first side plate adjusting part formed on the first parallel side plate to adjust a length in the first direction.
4. 4. The bus bar of claim 3, wherein the first side plate adjustment member is bent in a zig-zag shape.
5. 5. A battery pack, comprising: A housing; A plurality of first battery cells accommodated in the case and each including a first positive electrode terminal and a first negative electrode terminal; A plurality of second battery cells accommodated in the case and each including a second positive electrode terminal and a second negative electrode terminal; a first bus bar connecting the first negative electrode terminals of the plurality of first battery cells; a second bus bar connecting the second positive electrode terminals of the plurality of second battery cells, and A third bus bar connecting the first positive electrode terminals of the plurality of first battery cells and the second negative electrode terminals of the plurality of second battery cells, Wherein at least one of the first bus bar, the second bus bar, and the third bus bar is deformable according to the positions of the plurality of first battery cells and the plurality of second battery cells.
6. 6. The battery pack of claim 5, wherein The first positive electrode terminal and the second negative electrode terminal are disposed toward one side in a first direction, and The first negative electrode terminal and the second positive electrode terminal are disposed to face the other side in the first direction.
7. 7. The battery pack of claim 6, wherein the first bus bar comprises: A first parallel connection member connecting the first negative electrode terminals adjacent to each other in parallel, and A first parallel extending member extending from the first parallel connecting member in the first direction.
8. 8. The battery pack of claim 7, wherein The plurality of first battery cells are arranged in a second direction intersecting the first direction, and The first parallel connection member includes a first parallel center plate, a first parallel web extending from the first parallel center plate in parallel to the second direction and coupled to the first negative electrode terminal, and a first coupling adjustment member formed on the first parallel web to be adjustable in length in the second direction.
9. 9. The battery pack of claim 8, wherein the first connection adjustment member defines a U-shaped or V-shaped bend.
10. 10. The battery pack of claim 8, wherein the first parallel extending member comprises: a first parallel side plate connected to the first parallel connection member and arranged parallel to the first direction; a first parallel upper plate extending from the first parallel side plate and arranged to intersect the first parallel side plate, and And a first side plate adjusting part formed on the first parallel side plate to adjust a length in the first direction.
11. 11. The battery pack according to claim 10, wherein the first side plate regulating member is bent in a zigzag shape.
12. 12. The battery pack of claim 6, wherein the second bus bar comprises: A second parallel connection member connecting the second positive electrode terminals adjacent to each other in parallel, and A second parallel extending member extending from the second parallel connecting member in the first direction.
13. 13. The battery pack of claim 12, wherein The plurality of second battery cells being arranged in a second direction intersecting the first direction, and The second parallel connection member includes a second parallel center plate, a second parallel web extending from the second parallel center plate in parallel with the second direction and joined to the second positive electrode terminal, and a second joining adjustment member formed on the second parallel web to be adjustable in length in the second direction.
14. 14. The battery pack of claim 13, wherein the second coupling adjustment member defines a U-shaped or V-shaped bend.
15. 15. The battery pack of claim 12, wherein the second parallel extending member comprises: A second parallel side plate connected to the second parallel connection member and arranged parallel to the first direction; a second parallel upper plate extending from the second parallel side plate and arranged to intersect the second parallel side plate, and And a second side plate adjusting part formed on the second parallel side plate to adjust a length in the first direction.
16. 16. The battery pack according to claim 15, wherein the second side plate regulating member is bent in a zigzag shape.
17. 17. The battery pack of claim 6, wherein the third bus bar comprises: A plurality of third series members that connect the first positive electrode terminal and the second negative electrode terminal in series; A third connecting member connecting the plurality of third serial members, and One or more third adjustment members on the third connection member to be adjustable in length in a second direction intersecting the first direction.
18. 18. The battery pack of claim 17, wherein The plurality of first battery cells and the plurality of second battery cells are arranged to face each other in a third direction intersecting the first direction and the second direction, and The plurality of third series members each include a third series center plate, a third series web extending from the third series center plate parallel to the third direction and joined to each of the first positive electrode terminal and the second negative electrode terminal, and a third joining adjustment member formed on the third series web to be adjustable in length in the third direction.
19. 19. The battery pack of claim 17, wherein the third adjustment member defines a U-shaped or V-shaped bend.
20. 20. The battery pack according to claim 5, further comprising an elastic member provided in the housing and supporting the plurality of first battery cells and the plurality of second battery cells to compensate for heights of the plurality of first battery cells and the plurality of second battery cells.

Description

Bus bar and battery pack Technical Field Aspects of embodiments of the present disclosure relate to a bus bar and a battery pack. Background In general, as the demand for portable electronic products such as laptop computers, video cameras, and mobile phones rapidly increases, commercialization of robots, electric vehicles, and the like is beginning to be earnestly conducted, and research into high-performance secondary batteries capable of being repeatedly charged and discharged is actively underway. In particular, lithium secondary batteries are widely used as energy sources for various electronic products due to their high energy density and operating voltage and excellent storage and health (SOH) characteristics. Among the lithium secondary batteries, a cylindrical secondary battery includes an electrode assembly having a cylindrical shape, a can having a cylindrical shape and accommodating the electrode assembly and an electrolyte, and a cap assembly connected to an opening of the can to seal the can and allow a current generated in the electrode assembly to flow to an external device. The cylindrical secondary battery has a structure in which a negatively charged can and a positively charged cap assembly are insulated from each other by a gasket. If the cylindrical secondary batteries are formed into a group, the welding seam connected to the electrode connection body or the controller may be placed horizontally with respect to the longitudinal direction of the cylindrical secondary batteries or parallel to the main body direction. Here, it is desirable to maintain flatness at the time of laser welding or resistance welding. The above information disclosed in the art forming the background of the present disclosure is provided to improve understanding of the background of the present disclosure and thus may include information that does not constitute a related art. Disclosure of Invention According to an aspect of embodiments of the present disclosure, there is provided a bus bar and a battery pack capable of ensuring flatness of welding in a process in which a plurality of cylindrical battery cells are connected in series and in parallel, and improving workability and productivity of the process. The above and other aspects and features of the present disclosure will be described or will be apparent from the following description of some embodiments of the present disclosure. In accordance with one or more embodiments of the present disclosure, a bus bar includes a first parallel connection member and a first parallel extension member extending from the first parallel connection member in a first direction, wherein the first parallel connection member includes a first parallel center plate, a first parallel web extending from the first parallel center plate parallel to a second direction intersecting the first direction, and a first connection adjusting member formed on the first parallel web to adjust a length in the second direction. The first connection adjustment member may define a U-shaped or V-shaped bend. The first parallel extending member may include a first parallel side plate connected to the first parallel connecting member and arranged parallel to the first direction, a first parallel upper plate extending from the first parallel side plate and arranged to intersect the first parallel side plate, and a first side plate adjusting member formed on the first parallel side plate to adjust a length in the first direction. The first side plate regulating member may be bent in a zigzag shape. According to one or more embodiments of the present disclosure, a battery pack includes a case, a plurality of first battery cells accommodated in the case and each including a first positive electrode terminal and a first negative electrode terminal, a plurality of second battery cells accommodated in the case and each including a second positive electrode terminal and a second negative electrode terminal, a first bus bar connecting the first negative electrode terminals of the plurality of first battery cells, a second bus bar connecting the second positive electrode terminals of the plurality of second battery cells, and a third bus bar connecting the first positive electrode terminals of the plurality of first battery cells and the second negative electrode terminals of the plurality of second battery cells, wherein at least one of the first bus bar, the second bus bar, and the third bus bar is deformable according to positions of the plurality of first battery cells and the plurality of second battery cells. The first positive electrode terminal and the second negative electrode terminal may be disposed toward one side in the first direction, and the first negative electrode terminal and the second positive electrode terminal may be disposed toward the other side in the first direction. The first bus bar may include a first parallel connection member connecting first negative electrode terminals adj