A new energy vehicle power battery pack hard copper bar structure

Abstract

The utility model discloses a new energy automobile power battery package hard copper bar structure, this hard copper bar structure is in solving the connecting of wiring terminal and copper bar under prior art only relies on bolt and the sticking of copper bar surface, and the technical problem of loose of contact surface because of vibration, installation error etc. Including copper bar main part, and the insulating layer is wrapped to copper bar main part lateral wall, and the both ends of copper bar main part are provided with the connecting portion, and the connecting portion is provided with the connecting assembly in. The connecting portion is rectangular frame structure, and the upper and lower side walls of connecting portion are provided with bolt hole respectively, and the side of connecting portion is provided with the docking groove. The connecting assembly includes the locking bolt of setting in the bolt hole, and the utility model utilizes the connecting portion of bending and forming rectangular structure at both ends of copper bar main part, and cooperates locking bolt and the compression sleeve of both sides, and the gasket, can evenly distribute the compression force on the both sides of wiring terminal, avoids the deformation of terminal because of local stress.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive battery pack accessories, specifically relating to a hard copper busbar structure for a new energy vehicle power battery pack. Background Technology

[0002] In the power battery packs of new energy vehicles, rigid copper busbars are the core connectors for current transmission between battery modules. Their structural design directly affects the conductivity, connection stability, and safety of the power battery pack. Currently, most rigid copper busbars in power battery packs on the market are straight or simply bent structures with relatively simple connection designs. They typically only have bolt holes at the ends of the copper busbars, and the terminals are directly fixed to the surface of the copper busbars with bolts.

[0003] On the one hand, the connection between the terminal block and the copper busbar relies solely on the contact between the bolt and the surface of the copper busbar. The contact surface is prone to loosening due to vibration, installation errors, etc., which leads to increased contact resistance. This not only affects the conductivity but may also cause safety hazards due to overheating. On the other hand, the uneven distribution of the clamping force on the terminal when the bolt is tightened can easily cause excessive local force on the terminal and deformation, or lead to connection failure due to insufficient clamping. This results in poor adaptability and stability.

[0004] Therefore, a hard copper busbar structure for new energy vehicle power battery packs is designed to overcome the aforementioned technical defects. Utility Model Content

[0005] (1) Technical problems to be solved To address the shortcomings of existing technologies, the purpose of this utility model is to provide a rigid copper busbar structure for power battery packs of new energy vehicles. This rigid copper busbar structure aims to solve the technical problem that, under existing technologies, the connection between the terminal block and the copper busbar relies solely on the fit between the bolt and the surface of the copper busbar, and the contact surface is prone to loosening due to vibration, installation errors, etc.

[0006] (2) Technical solution To solve the above-mentioned technical problems, this utility model provides a hard copper busbar structure for a power battery pack for new energy vehicles, including a copper busbar body, an insulating layer wrapped around the side wall of the copper busbar body, and connecting parts at both ends of the copper busbar body, with connecting components installed inside the connecting parts.

[0007] Furthermore, the connecting part has a rectangular frame structure, with bolt holes on the upper and lower side walls and mating grooves on the side of the connecting part.

[0008] Furthermore, the connecting assembly includes a locking bolt disposed in the bolt hole, a nut threadedly connected to the side wall of the locking bolt located on the lower side of the connecting part, a first clamping sleeve and a second clamping sleeve sleeved on the side wall of the locking bolt located on the inner side of the connecting part, the diameter of the first clamping sleeve and the second clamping sleeve being smaller than the diameter of the bolt hole, and a terminal block sleeved between the first clamping sleeve and the second clamping sleeve on the side wall of the locking bolt.

[0009] Furthermore, the height of the mating groove is greater than the height of the first clamping sleeve and the second clamping sleeve.

[0010] Furthermore, the outer diameter of the upper part of the first clamping sleeve is smaller than the inner diameter of the lower part of the second clamping sleeve.

[0011] Furthermore, the copper busbar body is provided with a curved section.

[0012] Furthermore, gaskets are fitted on the upper and lower sides of the connecting part on the sidewalls of the locking bolt.

[0013] Furthermore, the insulating layer material can be any one of an insulating coating or an insulating film.

[0014] (3) Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the design of the copper busbar body, connecting part and connecting components, utilizes the connecting part formed by bending the two ends of the copper busbar body to form a rectangular structure. With the help of locking bolts and clamping sleeves and gaskets on both sides, the clamping force can be evenly distributed on both sides of the terminal, avoiding the deformation of the terminal due to local stress, effectively preventing loose connection, reducing the abnormal increase of contact resistance, reducing the risk of overheating, and improving conductivity stability and safety of use. In addition, the connection part can reduce the overall space occupied by the copper busbar while ensuring connection strength, which can adapt to the compact layout requirements inside the power battery pack. Furthermore, through the cooperation of the clamping sleeve and the gasket, it can be adapted to terminals of different thicknesses or sizes, eliminating the need to design a copper busbar structure separately for specific terminals, thus enhancing the versatility and adaptability of the copper busbar. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the assembled connecting components of this utility model; Figure 3 This is a schematic diagram of the connecting part of this utility model; Figure 4 This is a schematic diagram of the structure of the connecting component of this utility model; Figure 5 This is a cross-sectional view of the connecting component of this utility model; Figure 6 This is a schematic diagram showing the disassembled structure of the connecting component of this utility model.

[0016] The markings in the attached diagram are as follows: 1. Copper busbar body; 2. Insulation layer; 3. Connecting part; 4. Bolt hole; 5. Connecting groove; 6. Locking bolt; 7. Nut; 8. Washer; 9. First clamping sleeve; 10. Second clamping sleeve; 11. Terminal; 12. Bending part. Detailed Implementation

[0017] This specific embodiment is a hard copper busbar structure for a power battery pack in a new energy vehicle, and its structural schematic diagram is shown below. Figures 1-6 As shown, it includes a copper busbar body 1, the sidewalls of the copper busbar body 1 are covered with an insulating layer 2, and the two ends of the copper busbar body 1 are provided with connecting parts 3, and connecting components are provided in the connecting parts 3.

[0018] like Figures 3-6 As shown, the connecting part 3 is a rectangular frame structure, and bolt holes 4 are respectively opened on the upper and lower side walls of the connecting part 3, and mating grooves 5 are opened on the side of the connecting part 3.

[0019] The connecting part 3 is formed by bending both ends of the copper busbar body 1, and there is an opening between the end and the side of the copper busbar body 1. The cooperation between the connecting part 3 and the connecting component provides a stable connection carrier for the terminal block 11. Compared with the traditional single end mounting hole design, it can improve the reliability of the connection. Moreover, compared with the traditional flat end, the rectangular frame structure can provide stronger structural strength in the same space and reduce the deformation caused by force during the connection process.

[0020] like Figure 5 and Figure 6 As shown, the connecting assembly includes a locking bolt 6 disposed in the bolt hole 4. A nut 7 is threadedly connected to the side wall of the locking bolt 6 located on the lower side of the connecting part 3. A first clamping sleeve 9 and a second clamping sleeve 10 are sleeved on the side wall of the locking bolt 6 located inside the connecting part 3. The diameters of the first clamping sleeve 9 and the second clamping sleeve 10 are smaller than the diameter of the bolt hole 4, providing a certain amount of room for movement of the first clamping sleeve 9 and the second clamping sleeve 10, which facilitates fine-tuning according to the thickness of the terminal 11 during installation to ensure the clamping effect. A terminal 11 is sleeved between the first clamping sleeve 9 and the second clamping sleeve 10 on the side wall of the locking bolt 6.

[0021] The first clamping sleeve 9 and the second clamping sleeve 10 can distribute the pressure of the locking bolt 6 to a larger area of ​​the terminal 11, avoiding excessive local stress. The terminal 11 achieves electrical connection with the copper busbar body 1 through the clamping of the first clamping sleeve 9 and the second clamping sleeve 10. Compared with the traditional direct bonding method, the contact is more stable.

[0022] like Figure 4 and Figure 5 As shown, the height of the mating groove 5 is greater than the height of the first clamping sleeve 9 and the second clamping sleeve 10. During assembly, this facilitates the insertion of the first clamping sleeve 9, the second clamping sleeve 10, and the terminal block 11 into the mating groove 5, providing an installation space.

[0023] like Figure 6As shown, the upper outer diameter of the first clamping sleeve 9 is smaller than the lower inner diameter of the second clamping sleeve 10. The first clamping sleeve 9 needs to be inserted into the lower bolt hole 4 from the unclosed side of the mating groove 5 or the connecting part 3, and the middle diameter of the first clamping sleeve 9 is larger than the diameter of the bolt hole 4. Therefore, the first clamping sleeve 9 can stably support the terminal 11 in the connecting part 3.

[0024] like Figure 1 and Figure 2 As shown, the copper busbar body 1 is provided with a curved portion 12. The curved portion 12 enables the copper busbar body 1 to better adapt to the complex spatial layout inside the battery pack, reducing the overall space occupied and improving space utilization compared to a straight structure. The curved portion 12 can also be made into other shapes according to the shape of the battery pack.

[0025] like Figure 6 As shown, the sidewalls of the locking bolt 6 are fitted with gaskets 8 on the upper and lower sides of the connecting part 3.

[0026] The insulating layer 2 is made of either an insulating coating or an insulating film. The insulating layer 2 can effectively block the electrical connection between the copper busbar body 1 and other metal components in the battery pack, avoiding safety problems such as leakage and short circuits; its insulating material can also be selected according to the power of the battery pack or the local circuit current to meet the insulation requirements.

[0027] Working principle: When connecting the copper busbar body 1 to the terminal block 11, firstly, the first clamping sleeve 9 is placed in the connecting part 3 through the mating groove 5 and inserted into the lower bolt hole 4. Then, the terminal block 11 is fitted onto the first clamping sleeve 9 through the mating groove 5. Next, the second clamping sleeve 10 is inserted through the upper bolt hole 4. Then, a washer 8 is placed on the second clamping sleeve 10, and the locking bolt 6 is inserted into the washer 8, the second clamping sleeve 10 and the first clamping sleeve 9 in sequence. Another washer 8 is fitted onto the lower side of the side wall of the locking bolt 6 and tightened with a nut 7. This causes the locking bolt 6 to press the first clamping sleeve 9 and the second clamping sleeve 10, which is used to press and fix the terminal block 11 to prevent loosening.

[0028] All technical features in this embodiment can be freely combined according to actual needs.

[0029] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A new energy vehicle power battery pack hard copper bar structure, comprising a copper bar main body (1), characterized in that: The copper busbar body (1) has an insulating layer (2) wrapped around its side wall. The copper busbar body (1) has connecting parts (3) at both ends, and connecting components are provided in the connecting parts (3).

2. The new energy vehicle power battery pack hard copper bar structure according to claim 1, characterized in that: The connecting part (3) is a rectangular frame structure. Bolt holes (4) are opened on the upper and lower side walls of the connecting part (3), and a mating groove (5) is opened on the side of the connecting part (3).

3. The new energy vehicle power battery pack hard copper bar structure according to claim 2, characterized in that: The connecting assembly includes a locking bolt (6) disposed in a bolt hole (4). A nut (7) is threadedly connected to the side wall of the locking bolt (6) located on the lower side of the connecting part (3). A first clamping sleeve (9) and a second clamping sleeve (10) are sleeved on the side wall of the locking bolt (6) located inside the connecting part (3). The diameter of the first clamping sleeve (9) and the second clamping sleeve (10) is smaller than the diameter of the bolt hole (4). A terminal (11) is sleeved between the first clamping sleeve (9) and the second clamping sleeve (10) on the side wall of the locking bolt (6).

4. The new energy vehicle power battery pack hard copper bar structure according to claim 3, characterized in that: The height of the docking groove (5) is greater than the height of the first clamping sleeve (9) and the second clamping sleeve (10).

5. The new energy vehicle power battery pack hard copper bar structure according to claim 3, characterized in that: The upper outer diameter of the first clamping sleeve (9) is smaller than the lower inner diameter of the second clamping sleeve (10).

6. The new energy vehicle power battery pack hard copper bar structure according to claim 1, characterized in that: The copper busbar body (1) is provided with a curved part (12).

7. The new energy vehicle power battery pack hard copper bar structure according to claim 3, characterized in that: The locking bolt (6) has gaskets (8) fitted on the upper and lower sides of the connecting part (3).

8. The new energy vehicle power battery pack hard copper bar structure according to claim 1, characterized in that: The insulating layer (2) is made of either an insulating coating or an insulating film.

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