Convergence assembly and battery pack

Abstract

The utility model discloses a confluence assembly and a battery pack, the confluence assembly comprises a confluence support, the confluence support comprises a first support and a second support, and the first support and the second support are connected through a first connecting part and a second connecting part in a matching manner; the bus-bar support comprises a plurality of bus-bars, and the plurality of bus-bars are arranged on the bus-bar support at intervals in the length direction of the bus-bar support. According to the confluence assembly provided by the utility model, through the arrangement of the first connecting part and the second connecting part, the connection of the first bracket and the second bracket is realized, the stable connection of the first bracket and the second bracket is ensured, the production difficulty and the risk of fracture in the transportation process are reduced, the number of waste parts is reduced, and the structural strength of the confluence assembly is improved; and impact caused by charging and discharging of the battery can be buffered.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a busbar assembly and a battery pack. Background Art

[0002] As pointed out in the related art, during the long-term development of society, the full and effective utilization and squeezing of space have become common processing means and solutions in many fields. In power batteries, in order to improve the battery power and energy density to meet the requirements such as vehicle endurance, it is often necessary to continuously improve and perfect the design and layout of each component in the battery pack, so as to make more full and effective use of the limited space of the battery pack. In addition, in order to shorten the charging time, high-power charging of the battery is required.

[0003] Currently, the battery pack adopts the CTP (Cell To Pack) structure or the LCTP (Long Cell To Pack) structure to reduce the intermediate structural parts from the battery cells to the battery pack and improve the grouping rate and space utilization rate of the battery pack. In the related art, there is a crossbeam in the battery pack. In order to electrically connect multiple battery monomers on both sides of the crossbeam, there are requirements for the length of the busbar support assembly and a bridging design is made at the crossbeam.

[0004] Currently, in the long module of the upper and lower cases on the market with a crossbeam, the low-voltage plug-in is output on both sides, and the busbar support is mostly of an integral structure. The bridging area improves the anti-deformation strength by increasing the shape design, as Figure 1 shown. The advantages of this solution are: the manufacturing process of the flexible circuit board and the busbar support is simple. The disadvantages are: ① The output directions of the low-voltage plug-ins of the battery pack are not unified, resulting in a complex low-voltage wire harness route and unnecessary waste; ② The development cost of the support mold is high and the cycle is long. The mold size of the integral support is larger and the development cycle will also be extended accordingly. The corresponding overall R & D cycle will also be affected; ③ The production of the support is difficult, and waste parts are easily generated, resulting in the scrapping of the entire busbar support assembly and a large cost loss; ④ The busbar support assembly is easily bent and damaged during transportation. During the installation process, there is a risk of fracture in the bridging area of the crossbeam. Content of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides a busbar assembly with high structural strength and stable connection.

[0006] The utility model also provides a battery pack with the above busbar assembly.

[0007] The busbar assembly according to the first aspect of the present utility model includes: a busbar bracket, the busbar bracket includes a first bracket and a second bracket, and the first bracket and the second bracket are cooperatively connected through a first connecting portion and a second connecting portion; a busbar, there are a plurality of busbars, and in the length direction of the busbar bracket, the plurality of busbars are spaced on the busbar bracket.

[0008] According to the busbar assembly of the present utility model, by providing the first connecting portion and the second connecting portion, the connection between the first bracket and the second bracket is realized, ensuring the stable connection between the first bracket and the second bracket, reducing the production difficulty and the risk of breakage during transportation, reducing the number of waste parts, improving the structural strength of the busbar assembly, and at the same time buffering the impact brought by battery charging and discharging.

[0009] In some embodiments, a first connecting portion is formed on one of the first bracket and the second bracket, and a second connecting portion is formed on the other of the first bracket and the second bracket, and the first connecting portion and the second connecting portion cooperate to connect the first bracket and the second bracket.

[0010] In some embodiments, the first connecting portion is formed as a connecting hole, the second connecting portion is formed as a connecting protrusion, and the connecting protrusion extends into the connecting hole.

[0011] In some embodiments, the busbar includes: a busbar body and a buffer plate, the buffer plate is arranged on the busbar body, the buffer plate is formed as a plate body and extends along the length direction of the busbar body, and the buffer plate is located between the pole columns.

[0012] In some embodiments, both the busbar body and the buffer plate are formed with buffer portions that are recessed toward the direction where the battery cells are located.

[0013] In some embodiments, heat riveting holes and positioning holes are formed on the busbar body, fixing columns are formed on the busbar bracket, the fixing columns extend into the heat riveting holes, and the positioning holes are used to position the busbar and the battery cell pole columns.

[0014] In some embodiments, explosion-proof grooves are formed on the busbar bracket, the explosion-proof grooves are arranged in one-to-one correspondence with the explosion-proof valves of the battery cells, and the explosion-proof grooves are adapted to vent the gas after the explosion-proof valves are opened.

[0015] In some embodiments, the busbar assembly further includes: a flexible circuit board, limiting columns are formed on the busbar bracket, limiting holes are formed on the flexible circuit board, and the limiting columns and the limiting holes cooperate to limit the installation position of the flexible circuit board.

[0016] In some embodiments, the busbar assembly further includes: a low-voltage plug and an output busbar. The low-voltage plug is disposed at one end of the busbar assembly, and the output busbar is disposed at one end of the busbar assembly.

[0017] The battery pack according to the second aspect of the present invention includes the busbar assembly according to the first aspect of the present invention described above.

[0018] By providing the busbar assembly according to the first aspect, the battery pack according to the present invention reduces the assembly difficulty of the battery pack, reduces the components of the battery pack, reduces the production cost of the battery pack, ensures the economic structural strength of the battery pack, and improves the safety performance of the battery pack.

[0019] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a busbar assembly according to an embodiment of the present invention;

[0021] Figure 2 is Figure 1 a schematic diagram of another perspective of the busbar assembly shown in ;

[0022] Figure 3 is Figure 1 a schematic diagram of the busbar bracket shown in ;

[0023] Figure 4 is Figure 3 a schematic diagram of another perspective of the busbar bracket shown in ;

[0024] Figure 5 is Figure 4 a schematic diagram of the first bracket shown in ;

[0025] Figure 6 is Figure 4 a schematic diagram of the second bracket shown in ;

[0026] Figure 7 is Figure 1 a schematic diagram of the busbar shown in ;

[0027] Figure 8 is Figure 7 a schematic diagram of another perspective of the busbar shown in ;

[0028] Figure 9 is Figure 7 a schematic diagram of the assembly of the busbar shown in ;

[0029] Figure 10 is Figure 9Assembly schematic diagram of another perspective of the busbar shown in the figure.

[0030] Reference numerals:

[0031] 100, busbar assembly; 1, busbar bracket; 11, first bracket; 111, first connecting part; 12, second bracket; 121, second connecting part; 13, fixing column; 14, explosion-proof groove; 15, limiting column; 2, busbar; 21, busbar body; 211, hot riveting hole; 212, positioning hole; 22, buffer plate; 3, flexible circuit board; 31, limiting hole; 4, low-voltage plug-in; 5, output busbar; 200, battery cell; 201, explosion-proof valve; 202, pole post. Detailed implementation manners

[0032] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0033] Reference is made below to Figures 1 - 10 Describe the busbar assembly 100 according to the embodiment of the first aspect of the present utility model.

[0034] As Figure 1 shown, the busbar assembly 100 according to the embodiment of the first aspect of the present utility model includes: a busbar bracket 1 and a busbar 2.

[0035] Specifically, the busbar bracket 1 includes a first bracket 11 and a second bracket 12. The first bracket 11 and the second bracket 12 are cooperatively connected through a first connecting part 111 and a second connecting part 121. There are multiple busbars 2, and in the length direction of the busbar 2 bracket, the multiple busbars 2 are spaced apart on the busbar 2 bracket. Thus, the structure of the busbar assembly 100 is simple and ingeniously designed.

[0036] Preferably, the first connecting part 111 and the second connecting part 121 are connected by riveting.

[0037] According to the busbar assembly 100 of the embodiment of the present utility model, by providing the first connecting part 111 and the second connecting part 121, the connection between the first bracket 11 and the second bracket 12 is realized, ensuring the stable connection between the first bracket 11 and the second bracket 12, reducing the production difficulty and the risk of breakage during transportation, reducing the number of defective parts, improving the structural strength of the busbar assembly 100, and at the same time being able to buffer the impact caused by battery charging and discharging.

[0038] In some embodiments of the present utility model, as Figure 5 and Figure 6As shown, a first connecting portion 111 is formed on one of the first bracket 11 and the second bracket 12, and a second connecting portion 121 is formed on the other of the first bracket 11 and the second bracket 12. The first connecting portion 111 and the second connecting portion 121 cooperate to connect the first bracket 11 and the second bracket 12. Thus, the connection manner between the first bracket 11 and the second bracket 12 is simple, and the cooperation between the first connecting portion 111 and the second connecting portion 121 makes the connection structure between the first bracket 11 and the second bracket 12 stable, improving the structural strength of the first bracket 11 and the second bracket 12.

[0039] Further, the first connecting portion 111 is formed as a connecting hole, and the second connecting portion 121 is formed as a connecting protrusion. The connecting protrusion extends into the connecting hole. As shown in the figure, there are four connecting holes formed, and four connecting protrusions are formed. The four connecting holes and the four connecting columns are connected in one-to-one correspondence, and the radial dimension of the connecting hole is not less than the radial dimension of the connecting column.

[0040] Specifically, the root of the hot riveting column needs to be chamfered. In order to prevent interference between the busbar 2 and the root of the hot riveting column during installation, the root of the hot riveting column is sunken.

[0041] In some embodiments of the present invention, as Figure 7 and Figure 10 shown, the busbar 2 includes: a busbar body 21 and a buffer plate 22. The buffer plate 22 is provided on the busbar body 21. The buffer plate 22 is formed as a plate body and extends along the length direction of the busbar body 21. The buffer plate 22 is located between the pole columns 202. Thus, without increasing the thickness of the welding area of the busbar 2, the cross-section of the busbar 2 is increased, thereby improving the current-carrying capacity of the busbar 2, reducing the temperature rise speed, meeting the requirements of fast charging, and having a positioning function at the same time.

[0042] In some embodiments of the present invention, both the busbar body 21 and the buffer plate 22 are formed with buffer portions that are recessed toward the direction where the battery cell 200 is located. Thus, the expansion amount generated during charge and discharge can be absorbed, improving the safety performance of the battery pack.

[0043] In some embodiments of the present invention, a hot riveting hole 211 and a positioning hole 212 are formed on the busbar body 21, and a fixing column 13 is formed on the busbar bracket 1. The fixing column 13 extends into the hot riveting hole 211. The positioning hole 212 is used to position the busbar 2 and the pole column 202 of the battery cell 200. As Figure 7 shown, the hot riveting hole 211 realizes the fixation between the busbar body 21 and the busbar bracket 1 through the hot riveting process, and the positioning hole 212 is provided to position the busbar 2 and the pole column 202 of the battery cell 200. The position of the busbar 2 and the pole column 202 of the battery cell 200 is judged by laser focusing, improving the assembly accuracy of the busbar assembly 100 and the battery cell 200.

[0044] In some embodiments of the present utility model, such as Figures 1 - 6 shown, an explosion-proof groove 14 is formed on the busbar support 1. The explosion-proof groove 14 is arranged in one-to-one correspondence with the explosion-proof valve 201 of the battery cell 200. The explosion-proof groove 14 is adapted to vent the gas after the explosion-proof valve 201 is opened. Thus, if the battery cell 200 undergoes thermal runaway and causes the explosion-proof valve 201 to open, the explosion-proof groove 14 can ensure the smooth ejection of high-temperature and high-pressure gas, improving the safety performance of the battery pack.

[0045] In some embodiments of the present utility model, the busbar assembly 100 further includes: a flexible circuit board 3. A limiting post 15 is formed on the busbar support 1, and a limiting hole 31 is formed on the flexible circuit board 3. The limiting post 15 and the limiting hole 31 cooperate to limit the installation position of the flexible circuit board 3. Thus, it is convenient to fix the flexible circuit board 3, which helps the nickel sheet on the flexible circuit board 3 to be welded to the busbar 2, reducing the assembly difficulty of the busbar assembly 100.

[0046] In some embodiments of the present utility model, the busbar assembly 100 further includes: a low-voltage plug-in 4 and an output busbar 5. The low-voltage plug-in 4 is arranged at one end of the busbar assembly 100, and the output busbar 5 is arranged at one end of the busbar assembly 100. As shown in the figure, the low-voltage plug-in 4 and the output busbar 5 are both located at the same end of the busbar assembly 100, realizing the same-side output of the low-voltage plug-in 4 and the output busbar 5, simplifying the structure of the busbar assembly 100 and reducing the maintenance difficulty.

[0047] The battery pack according to the second aspect embodiment of the present utility model includes the busbar assembly 100 according to the first aspect embodiment of the present utility model described above.

[0048] The battery pack according to the embodiment of the present utility model, by setting the busbar assembly 100 of the first aspect embodiment described above, thus reduces the assembly difficulty of the battery pack, reduces the components of the battery pack, reduces the production cost of the battery pack, ensures the economic structural strength of the battery pack, and improves the safety performance of the battery pack.

[0049] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0051] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0053] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A busbar assembly, characterized in that: include: A bus bracket, the bus bracket comprises a first bracket and a second bracket, the first bracket and the second bracket are connected by a first connecting portion and a second connecting portion, one of the first bracket and the second bracket is formed with a first connecting portion, the other of the first bracket and the second bracket is formed with a second connecting portion, the first connecting portion and the second connecting portion cooperate to connect the first bracket and the second bracket, the first connecting portion is formed as a connecting hole, the second connecting portion is formed as a connecting protrusion, and the connecting protrusion extends into the connecting hole; The bus bar includes a plurality of bus bars, and the plurality of bus bars are arranged on the bus bar bracket at intervals in the length direction of the bus bar bracket.

2. The busbar assembly according to claim 1, characterized in that: The busbar comprises: a busbar body and a buffer plate, wherein the buffer plate is arranged on the busbar body, the buffer plate is formed as a plate body and extends along the length direction of the busbar body, and the buffer plate is located between the poles.

3. The busbar assembly according to claim 2, characterized in that: The busbar body and the buffer plate are both formed with a buffer portion recessed toward the direction where the battery core is located.

4. The busbar assembly according to claim 3, characterized in that: A heat riveting hole and a positioning hole are formed on the busbar body, a fixing column is formed on the busbar bracket, the fixing column extends into the heat riveting hole, and the positioning hole is used to position the busbar and the battery cell pole.

5. The busbar assembly according to any one of claims 1 to 4, characterized in that: An explosion-proof groove is formed on the converging bracket, and the explosion-proof groove is arranged in a one-to-one correspondence with the explosion-proof valve of the battery cell. The explosion-proof groove is suitable for passing the gas after the explosion-proof valve is opened.

6. The busbar assembly according to any one of claims 1 to 4, characterized in that: Also includes: A flexible circuit board, a limiting column is formed on the bus bracket, a limiting hole is formed on the flexible circuit board, and the limiting column cooperates with the limiting hole to limit the installation position of the flexible circuit board.

7. The busbar assembly according to any one of claims 1 to 4, characterized in that: Also includes: A low-voltage plug-in and an output bus bar, wherein the low-voltage plug-in is arranged at one end of the bus bar assembly, and the output bus bar is arranged at one end of the bus bar assembly.

8. A battery pack, characterized in that: The present invention comprises the confluence assembly according to any one of claims 1 to 7.

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