Busbar assembly and battery pack

Abstract

A busbar assembly and a battery pack. The busbar assembly comprises: a busbar body (1), which is provided with a positioning recess (11) and a welding recess (12) configured to be welded to a pole terminal of a battery cell, wherein a spacing is reserved between the positioning recess (11) and the welding recess (12); and a temperature acquisition element (5), which is glued in the positioning recess (11).

Description

Busbar assembly and battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 27, 2023, with application number 2023236202566. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a busbar assembly and a battery pack. Background Art

[0003] Currently, all busbars on the market are connected to temperature acquisition components, which facilitate monitoring battery temperature through the busbar and feeding the data back to the BMS (Battery Management System), enabling the BMS to implement appropriate control strategies. Currently, temperature acquisition components are typically assembled to the busbar using glue, a method often based on operator experience and assembly verification. However, in actual practice, glue has been found to easily overflow into the busbar's welding grooves, affecting welding quality and leading to problems such as cold solder joints. This presents room for improvement. Technical issues

[0004] How to quickly locate and assemble temperature acquisition components to reduce operational difficulty and improve work efficiency. Technical Solutions

[0005] In a first aspect, the present application provides a busbar assembly, comprising:

[0006] A busbar body having a positioning groove and a welding groove for welding to the pole terminal of the single battery, with a gap between the positioning groove and the welding groove;

[0007] The temperature collecting element is glued into the positioning groove.

[0008] In a second aspect, the present application provides a battery pack, comprising: the above-mentioned busbar assembly. Beneficial effects

[0009] By providing a positioning groove on the busbar body and a gap between the positioning groove and the welding groove, once the temperature acquisition element is glued into the positioning groove, glue overflow into the welding groove is greatly limited, facilitating smoother subsequent welding. Furthermore, the positioning groove on the busbar body allows for quick positioning and assembly of the temperature acquisition element, reducing operational difficulty and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a schematic structural diagram of a busbar assembly according to an embodiment of the present application;

[0011] FIG2 is a schematic structural diagram of a busbar assembly according to another embodiment of the present application;

[0012] FIG3 is another structural schematic diagram of a busbar assembly according to an embodiment of the present application;

[0013] FIG4 is a schematic structural diagram of a busbar assembly according to another embodiment of the present application.

[0014] Figures: 1-busbar body, 11-positioning groove, 12-welding groove, 13-first busbar, 14-second busbar, 2-area dividing line, 21-arc-shaped dividing line, 22-straight dividing line, 3-first area, 31-area one, 32-area three, 4-second area, 41-area two, 42-area four, 5-temperature collection element, 6-pressure collection element. Modes for Carrying Out the Invention

[0015] 1 to 4 , an embodiment of the present application discloses a busbar assembly.

[0016] Referring to Figure 1, in the embodiment of the present application, the busbar assembly includes a busbar body 1 and a temperature collection element 5. The busbar body 1 has a positioning groove 11 and a welding groove 12 for welding to the pole terminal of the single cell. A gap is left between the positioning groove 11 and the welding groove 12; the temperature collection element 5 is glued into the positioning groove 11.

[0017] The inventors of this application discovered that in the existing busbar assembly process, the temperature collection element 5 is usually assembled with the busbar by gluing, which causes the glue to easily overflow into the busbar's welding groove 12, affecting the welding effect and causing problems such as cold solder joints. Based on this, a positioning groove 11 is provided on the busbar body 1, and a gap is left between the positioning groove 11 and the welding groove 12. Therefore, after the temperature collection element 5 is glued into the positioning groove 11, the glue overflow into the welding groove 12 can be greatly limited, so that subsequent welding work can be carried out more smoothly. At the same time, the positioning groove 11 is provided on the busbar body 1, which can be used to quickly position and assemble the temperature collection element 5, reducing the difficulty of operation and improving work efficiency.

[0018] In one embodiment, the temperature collecting element 5 can be a temperature sensor, and the shape of the positioning groove 11 can be adapted to the shape of the temperature sensor, such as a square or a circle. In the illustrated embodiment, the positioning groove 11 is an elongated rectangular shape.

[0019] Referring to Figure 1 , in one embodiment of the present application, a busbar body 1 has a region dividing line 2, which divides the top surface of the busbar body 1 into a first region 3 and a second region 4. A welding groove 12 is provided in the first region 3, and a positioning groove 11 is provided in the second region 4. This arrangement divides the top surface of the busbar body 1 into the first region 3 and the second region 4. The welding groove 12 is provided in the first region 3, serving as the welding area, while the positioning groove 11 is provided in the second region 4, serving as the assembly area for the temperature collection element 5. This allows for intuitive identification of which area to perform corresponding operations. This not only reduces operational difficulty and improves work efficiency, but also allows the temperature collection element 5 to be kept away from the welding area, better protecting it and improving the positioning of the welding tooling.

[0020] Referring to Figure 1 , in one embodiment of the present application, the minimum spacing between the area dividing line 2 and the welding groove 12 is 6 mm. In actual welding, it has been found that maintaining a spacing of 6 mm or greater between the area dividing line 2 and the welding groove 12 provides sufficient space for subsequent welding operations within the welding groove 12, reducing operational difficulty and improving work efficiency. It also facilitates the positioning of the welding tool. Furthermore, the temperature sensor 5 is further away from the welding area, better protecting it.

[0021] In one embodiment, the area dividing line 2 is formed by protrusions from the busbar body 1. In this configuration, the area dividing line 2 and the busbar body 1 are integrally formed. Specifically, the area dividing line 2 can be formed by pressing the protruding area dividing line 2 onto the busbar body 1 through a pressing process, thereby facilitating direct processing of the area dividing line 2 onto the busbar body 1 and improving work efficiency.

[0022] In another embodiment, the area dividing line 2 can also be injection molded on the busbar body 1. In this configuration, the area dividing line 2 is provided on the busbar body 1 by injection molding, which is a mature injection molding process and is easy to manufacture.

[0023] Referring to Figure 2, in one embodiment of the present application, the top surface of the busbar body 1 has a recessed area and a raised area protruding from the recessed area. The boundary between the recessed and raised areas is a region dividing line 2. One of the recessed and raised areas is a first region 3, and the other is a second region 4. The recessed area is formed in a recessed manner on the top surface of the busbar body 1. This arrangement makes the first and second areas 3 and 4 on the top surface of the busbar body 1 more distinct, allowing workers to more intuitively determine which area to perform corresponding operations in, further reducing operational difficulty and improving work efficiency.

[0024] In the illustrated embodiment, the concave region is the first region 3 , the welding groove 12 is provided in the concave region, the convex region is the second region 4 , and the positioning groove 11 is provided in the convex region.

[0025] Of course, in other embodiments, the concave region is the second region 4 , the positioning groove 11 is provided in the concave region, the convex region is the first region 3 , and the welding groove 12 is provided in the convex region.

[0026] Referring to Figures 1 and 2 , in one embodiment of the present application, the region dividing line 2 comprises a connected arcuate dividing line 21 and a straight dividing line 22, with the arcuate dividing line 21 and the welding groove 12 being arranged concentrically. This arrangement simplifies the structure, facilitates manufacturing, and reduces manufacturing difficulty; it also results in a more compact structure, facilitating miniaturized busbar design.

[0027] Referring to Figures 1 and 2 , in one embodiment of the present application, the arcuate dividing line 21 is a semicircular dividing line, one end of which extends to the edge of the busbar body 1 and the other end connects to the linear dividing line 22. This arrangement simplifies the structure, facilitates production, and reduces manufacturing difficulty; it also facilitates the positioning of welding tooling.

[0028] 1 and 2 , in one embodiment of the present application, the minimum distance between the arc-shaped dividing line 21 and the welding groove 12 is 6 mm. In the embodiment shown in FIG1 and 2 , the minimum distance between the arc-shaped dividing line 21 and the welding groove 12 is d, that is, d≥6 mm.

[0029] In actual welding, it has been found that maintaining a spacing of 6 mm or greater between the arc-shaped dividing line 21 and the welding groove 12 provides sufficient space for subsequent welding operations within the welding groove 12, reducing operational difficulty and improving work efficiency. This also facilitates the positioning of the welding tool. Furthermore, the temperature sensor 5 is further away from the welding area, better protecting it.

[0030] Referring to Figure 4 , in one embodiment of the present application, a busbar body 1 includes a first busbar 13 and a second busbar 14 connected to each other. A positioning groove 11 is provided on the first busbar 13. The busbar assembly also includes a pressure collection element 6 connected to the second busbar 14. Two welding grooves 12 are provided, one corresponding to each other, on the first busbar 13 and the second busbar 14. This arrangement allows the pressure collection element 6 and the temperature collection element 5 to be provided on the busbar body 1. These serve as pressure and temperature collection points for the busbar body 1, enabling simultaneous monitoring of battery temperature and voltage, and feeding this data back to the battery management system (BMS), enabling the BMS to implement corresponding control strategies and thus improving battery safety.

[0031] Referring to FIG. 4 , in one embodiment of the present application, two region dividing lines 2 are provided, one correspondingly disposed on the first busbar 13 and the second busbar 14. On the first busbar 13, one of the region dividing lines 2 divides the top surface of the first busbar 13 into region 1 31 and region 2 41, with the positioning groove 11 disposed within region 1 31 and one of the welding grooves 12 disposed within region 2 41. On the second busbar 14, the other region dividing line 2 divides the top surface of the second busbar 14 into region 3 32 and region 4 42, with the pressure collection element 6 disposed within region 3 32 and the other welding groove 12 disposed within region 4 42. This arrangement ensures that the temperature collection element 5 and the pressure collection element 6 are positioned away from the two welding grooves 12, respectively, thus better protecting the temperature collection element 5 and the pressure collection element 6.

[0032] In one embodiment, the first region 31 and the third region 32 constitute a first region 3 , and the second region 41 and the fourth region 42 constitute a second region 4 .

[0033] 4 , in one embodiment of the present application, two area dividing lines 2 are symmetrically arranged. This arrangement simplifies the structure, facilitates manufacturing, and reduces manufacturing difficulty.

[0034] This application also discloses a battery pack including the aforementioned busbar assembly. In one embodiment, a positioning groove 11 is provided on the busbar body 1, with a gap between the positioning groove 11 and the welding groove 12. Therefore, after the temperature acquisition element 5 is glued into the positioning groove 11, the glue can be greatly limited from overflowing into the welding groove 12, facilitating subsequent welding work. Furthermore, the positioning groove 11 provided on the busbar body 1 allows for quick positioning and assembly of the temperature acquisition element 5, reducing operational difficulty and improving work efficiency.

Claims

1. A bus bar assembly, comprising: A bus bar body (1) having a positioning groove (11) and a welding groove (12) for welding with the pole terminal of a single cell, with a spacing left between the positioning groove (11) and the welding groove (12); A temperature acquisition element (5) adhesively bonded in the positioning groove (11).

2. The bus bar assembly according to claim 1, wherein, The bus bar body (1) has an area dividing line (2), and the area dividing line (2) divides the top surface of the bus bar body (1) into a first area (3) and a second area (4). The welding groove (12) is provided in the first area (3), and the positioning groove (11) is provided in the second area (4).

3. The bus bar assembly according to claim 2, wherein, The minimum distance between the area dividing line (2) and the welding groove (12) is 6 mm.

4. A busbar assembly according to claim 2, wherein, The area dividing line (2) is formed by the protrusion of the bus bar body (1) itself; Alternatively, the area dividing line (2) is injection molded on the bus bar body (1).

5. A busbar assembly according to claim 2, wherein, The top surface of the bus bar body (1) has a concave area and a convex area protruding from the concave area, and the boundary line between the concave area and the convex area is the area dividing line (2); One of the concave area and the convex area is the first area (3), and the other is the second area (4).

6. The bus bar assembly according to claim 2, wherein, The area dividing line (2) includes a connected arc dividing line (21) and a straight dividing line (22), and the arc dividing line (21) and the welding groove (12) are concentrically arranged.

7. A busbar assembly according to claim 6, wherein, The arc dividing line (21) is a semi-circular dividing line, one end of the semi-circular dividing line extends to the edge of the bus bar body (1), and the other end is connected to the straight dividing line (22); The minimum distance between the arc dividing line (21) and the welding groove (12) is 6 mm.

8. A bus bar assembly according to claim 6, wherein, The bus bar body (1) includes a connected first bus bar piece (13) and a second bus bar piece (14). The positioning groove (11) is provided in the first bus bar piece (13). The bus bar assembly further includes a pressure acquisition element (6), and the pressure acquisition element (6) is connected to the second bus bar piece (14); There are two welding grooves (12), and the two welding grooves (12) are respectively provided in the first bus bar piece (13) and the second bus bar piece (14) in a one-to-one correspondence.

9. A bus bar assembly according to claim 8, wherein, There are two area dividing lines (2), and the two area dividing lines (2) are respectively provided in the first bus bar piece (13) and the second bus bar piece (14) in a one-to-one correspondence; On the first bus bar piece (13), one of the area dividing lines (2) divides the top surface of the first bus bar piece (13) into an area one (31) and an area two (41). The positioning groove (11) is provided in the area one (31), and one of the welding grooves (12) is provided in the area two (41); On the second bus bar (14), the other regional dividing line (2) divides the top surface of the second bus bar (14) into a region three (32) and a region four (42), the pressure acquisition element (6) is arranged in the region three (32), and the other welding groove (12) is arranged in the region four (42); The two regional dividing lines (2) are symmetrically arranged.

10. A battery pack, comprising a bus bar assembly according to any one of claims 1-9.

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