Anti-rotation tooling for copper bar connections

Abstract

The utility model provides a kind of copper bar connection anti-rotation tool, it is related to copper bar connection tool technical field.The copper bar connection anti-rotation tool includes tool main body, the tool main body is used to cover and set in the end of first copper bar, the end of second copper bar and the top end surface of the laminated structure formed by the stacking of base;The tool main body is provided with through hole, the through hole is used to provide the avoiding space for the tightening operation of the fastening bolt of the laminated structure;The side of the tool main body towards the laminated structure is provided with a plurality of anti-rotation card along the circumferential direction of the through hole, and the anti-rotation card is located at the outer circumferential side of the laminated structure, for limiting the rotation of the first copper bar, the second copper bar and the base relative to the tool main body by contact limiting.

Description

Technical Field

[0001] This utility model relates to the field of copper busbar connection tooling technology, and more specifically, to a copper busbar connection anti-rotation tooling. Background Technology

[0002] In the structural design of new energy battery packs, the battery pack is usually composed of multiple cell modules. The terminal copper busbars of each cell module are connected through the copper busbars of the battery pack to realize the high-voltage power collection and transmission of the entire battery pack.

[0003] Currently, the fixed connection between the battery pack copper busbar and the module terminal copper busbar mostly adopts the method of "fastening bolt + base (nut with insulating sleeve)". Specifically, the fastening bolt passes through the mounting holes of the battery pack copper busbar and the module terminal copper busbar, and then locks in place with the threaded hole of the base. The preload of the bolt ensures that the contact surfaces of the two copper busbars are tightly fitted, ensuring conductivity. However, during the tightening of the fastening bolt, the two copper busbars and the base are prone to rotation, which can lead to problems such as copper busbar deflection and deformation, affecting the conductive contact performance and long-term stability of the copper busbars. Utility Model Content

[0004] The problem solved by this invention is how to limit the rotation of the copper busbar during connection.

[0005] To solve the above problems, this utility model provides a copper busbar connection anti-rotation fixture, including a fixture body, which is used to cover the top end face of the stacked structure formed by stacking the end of the first copper busbar, the end of the second copper busbar, and the base; The tooling body has a through hole, which provides clearance for the tightening operation of the fastening bolts of the stacked structure; The tooling body is provided with a plurality of anti-rotation clips at circumferential intervals along the through hole on the side facing the stacked structure. The anti-rotation clips are located on the outer peripheral side of the stacked structure and are used to limit the rotation of the first copper busbar, the second copper busbar and the base relative to the tooling body by contact limiting.

[0006] Optionally, the anti-rotation clip includes a first anti-rotation clip in the shape of a plate, one surface of which is used to form a surface-to-surface contact limit with the base to restrict the base from rotating relative to the tooling body.

[0007] Optionally, the anti-rotation card further includes a second anti-rotation card and a third anti-rotation card that are spaced apart. The second anti-rotation card and the third anti-rotation card are both located on the same side of the first anti-rotation card. The first copper busbar and the second copper busbar pass through one of the gaps formed between the first anti-rotation card, the second anti-rotation card and the third anti-rotation card.

[0008] Optionally, both the second anti-rotation card and the third anti-rotation card are elongated strips, and the length direction of the second anti-rotation card, the length direction of the third anti-rotation card, and one plate surface of the first anti-rotation card are all parallel to the stacking direction of the stacked structure.

[0009] Optionally, the gap formed between the second anti-rotation clip and the third anti-rotation clip is used for the first copper busbar or the second copper busbar to pass through; the tooling body has a groove in the area between the second anti-rotation clip and the third anti-rotation clip on the side facing the stacked structure; one end of the groove penetrates the inner wall of the through hole, and the other end penetrates the outer peripheral side of the tooling body, and the groove width is equal to the distance between the second anti-rotation clip and the third anti-rotation clip.

[0010] Optionally, the tooling body has a square plate structure, the through hole is a square cross-section hole, and the four inner wall surfaces of the through hole are respectively parallel to the four sides of the tooling body. One surface of the first anti-rotation clip is coplanar with one inner wall surface of the through hole, and the other surface is coplanar with one side surface of the tooling body; the second anti-rotation clip and the third anti-rotation clip are respectively located at two corners of the tooling body away from the first anti-rotation clip.

[0011] Optionally, the gap formed between the second anti-rotation card and the third anti-rotation card is used for the first copper busbar or the second copper busbar to pass through; a reinforcing plate is provided on the side of the third anti-rotation card away from the stacked structure, and the side of the third anti-rotation card facing the second anti-rotation card and the plate surface of the reinforcing plate facing the second anti-rotation card are both planes and are coplanar.

[0012] Optionally, the copper busbar connecting anti-rotation fixture is an integrally formed structure.

[0013] Optionally, two tooling bodies are arranged side by side, and the two tooling bodies are connected by a first connecting plate.

[0014] Optionally, the tooling body is further provided with a positioning structure, which is used to position and cooperate with an external fixed structure to restrict the rotation of the tooling body.

[0015] The beneficial effects of this utility model's copper busbar connection anti-rotation fixture are: By covering the top end face of the stacked structure with the main body of the tooling, each anti-rotation clip is located on the outer periphery of the stacked structure, thereby contacting and abutting against the sides of the first copper busbar, the second copper busbar, and the base respectively. This restricts the rotation of the first copper busbar, the second copper busbar, and the base relative to the main body of the tooling in the circumferential direction of the stacked structure, thereby achieving rotation limit of the first copper busbar, the second copper busbar, and the base, preventing them from rotating when tightening the fastening bolts, achieving precise alignment of the first copper busbar, the second copper busbar, and the base, ensuring that the pre-tightening force of the fastening bolts is accurately transmitted to the stacked structure, keeping the first copper busbar and the second copper busbar in close contact, and improving the stability and electrical reliability of the connection structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the copper busbar connection anti-rotation fixture covering the overlapping structure in an embodiment of this application.

[0017] Figure 2 for Figure 1 The split diagram.

[0018] Figure 3 This is a schematic diagram of the anti-rotation fixture for copper busbar connection in the embodiments of this application.

[0019] Figure 4 This is a schematic diagram of the anti-rotation tooling for copper busbar connection in an embodiment of this application from another perspective.

[0020] Figure 5 This is a schematic diagram of the overlapping structure of the anti-rotation tooling for copper busbar connection in the embodiments of this application (corresponding to...). Figure 10 ).

[0021] Figure 6 This is a schematic diagram of the extension of the anti-rotation fixture for connecting the copper busbar in an embodiment of this application.

[0022] Figure 7 This is a schematic diagram of the protective plate of the copper busbar connection anti-rotation fixture in the embodiments of this application.

[0023] Figure 8 This is a schematic diagram of the reinforcing plate of the anti-rotation fixture for copper busbar connection in the embodiments of this application.

[0024] Figure 9 This is a schematic diagram of the first connecting plate of the copper busbar connection anti-rotation fixture in the embodiments of this application.

[0025] Figure 10 This is a schematic diagram of the anti-rotation fixture for copper busbar connection positioned by the end plate in an embodiment of this application.

[0026] Figure 11 This is a schematic diagram of the anti-rotation fixture for copper busbar connection positioned by the frame in an embodiment of this application.

[0027] Figure 12This is a schematic diagram of the positioning plate of the anti-rotation fixture for copper busbar connection in the embodiments of this application.

[0028] Figure 13 This is another perspective view of the positioning plate of the copper busbar connection anti-rotation fixture in the embodiments of this application.

[0029] Figure 14 This is a schematic diagram of the overlapping structure of the anti-rotation tooling for copper busbar connection in the embodiments of this application (corresponding to...). Figure 11 ).

[0030] Explanation of reference numerals in the attached drawings: 1. Tooling body; 11. Side end face; 12. Groove; 13. Protective plate; 14. First connecting plate; 15. Reinforcing plate; 2. Through hole; 3. Anti-rotation clip; 31. First anti-rotation clip; 32. Second anti-rotation clip; 33. Third anti-rotation clip; 34. Extension; 41. First copper busbar; 42. Second copper busbar; 43. Base; 44. Fastening bolt; 51. Cell module; 511. End plate; 52. Battery pack shell; 521. Crossbeam; 522. Frame; 61. Positioning plate; 62. Second connecting plate; 63. Support plate. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0032] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0033] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless explicitly stated otherwise in the context, they should be understood as "one or more". "Several" refers to one or more "one or more".

[0034] The background section mentions that the base 43 also rotates during the tightening of the fastening bolt 44. This is explained as follows: In this application, the base 43 is not fixedly connected to the cell module 51, battery pack housing 52, or other structures. It is only secured by the fastening bolt 44, which overlaps and fastens the ends of the base 43, the first copper busbar 41, and the second copper busbar 42. During installation, after the cell module 51 is positioned within the battery pack housing 52, the position of the base 43 is adjusted to align the mounting holes on the base 43, the first copper busbar 41, and the second copper busbar 42 coaxially. The fastening bolt 44 then secures all three components. This installation method effectively avoids the problem of misalignment between the mounting holes of the second copper busbar 42 and the base 43 due to installation errors caused by the cell module 51 being stacked and installed within the battery pack housing 52. However, it also makes the base 43 more prone to rotation. Figure 1 As shown, the base 43, which adopts the above installation method, can be placed on the upper surface of the crossbeam 521 inside the battery pack housing 52 after installation.

[0035] like Figure 1-3 As shown, the copper busbar connection anti-rotation fixture provided in this embodiment of the utility model includes a fixture body 1, which is used to cover the top end face of the stacked structure formed by stacking the end of the first copper busbar 41, the end of the second copper busbar 42, and the base 43. The fixture body 1 has a through hole 2, which is used to provide clearance space for the tightening operation of the fastening bolts 44 of the stacked structure. Multiple anti-rotation clips 3 are arranged at intervals along the circumference of the through hole 2 on the side of the fixture body 1 facing the stacked structure. The anti-rotation clips 3 are located on the outer peripheral side of the stacked structure and are used to limit the rotation of the first copper busbar 41, the second copper busbar 42, and the base 43 relative to the fixture body 1 by contact limiting.

[0036] In this embodiment, by covering the top end face of the stacked structure with the tooling body 1, each anti-rotation clip 3 is located on the outer peripheral side of the stacked structure, thereby contacting and abutting the sides of the first copper busbar 41, the second copper busbar 42, and the base 43 respectively, restricting the first copper busbar 41, the second copper busbar 42, and the base 43 from rotating relative to the tooling body 1 in the circumferential direction of the stacked structure. This achieves rotation limit of the first copper busbar 41, the second copper busbar 42, and the base 43, preventing them from rotating when the fastening bolt 44 is tightened, achieving precise alignment of the first copper busbar 41, the second copper busbar 42, and the base 43, ensuring that the pre-tightening force of the fastening bolt 44 is accurately transmitted to the stacked structure, keeping the first copper busbar 41 and the second copper busbar 42 in close contact, and improving the stability and electrical reliability of the connection structure.

[0037] Specifically, the non-stacked ends of the first copper busbar 41 and the second copper busbar 42 are usually fixed ends. For example, the first copper busbar 41 is a battery pack copper busbar, and the second copper busbar 42 is a module terminal copper busbar. When the two are connected, the non-stacked end of the battery pack copper busbar is usually fixedly connected to a set position inside the battery pack housing 52, and the non-stacked end of the module terminal is also fixedly connected to the corresponding cell in the cell module 51. Therefore, by using the anti-rotation fixture connected to the copper busbar to restrict the relative rotation of the stacked end (free end) of the first copper busbar 41, the stacked end (free end) of the second copper busbar 42, and the base 43, the positioning of each stacked component can be achieved, effectively preventing the stacked components from deflecting as the fastening bolts 44 are tightened.

[0038] In addition, the anti-rotation clip 3 restricts the rotation of the stacked structure, specifically referring to the rotational movement of the stacked structure relative to the tooling body 1 during the tightening of the fastening bolts 44. Each anti-rotation clip 3 is fixedly connected to the tooling body 1.

[0039] Optionally, such as Figure 2 As shown, the main body of the tooling 1 has a plate-like structure, with one plate surface covering the top end face of the stacked structure. The through hole 2 is opened along the thickness direction of the plate of the main body of the tooling 1. The through hole 2 can be in the form of a round hole, a square hole, etc., and its minimum inner size must be larger than the outer diameter of the fastening bolt 44. It is also aligned with the mounting hole of the stacked structure to provide sufficient clearance for the tightening operation of the fastening bolt 44 and ensure the smoothness of the tightening process.

[0040] Note: In this application, for plate-like structures, two main planes that are directly opposite each other along the thickness direction are defined as one plate surface and the other plate surface, and the transition surface at the edge of the plate used to connect the two main planes is uniformly named the side surface.

[0041] Optionally, such as Figure 1 , Figure 3 and Figure 4 As shown, the anti-rotation clip 3 includes a plate-shaped first anti-rotation clip 31. One plate surface of the first anti-rotation clip 31 is used to form a surface-to-surface contact limit with the base 43 to restrict the base 43 from rotating relative to the tooling body 1.

[0042] In this optional embodiment, the anti-rotation clip 3 includes a plate-shaped first anti-rotation clip 31. Typically, the base 43 is square-shaped, and one surface of the first anti-rotation clip 31 forms a surface-to-surface contact limit with an outer peripheral side of the base 43. This surface-contact contact limit effectively restricts the circumferential rotation of the base 43 relative to the tooling body 1, and provides a large limiting contact area, dispersing the contact limiting force, avoiding stress concentration, and ensuring the stability of the entire limiting structure. Furthermore, the first anti-rotation clip 31 is preferably designed to be perpendicular to the plate of the tooling body 1, and the two are fixedly connected.

[0043] Optionally, such as Figure 1 and Figure 4 As shown, the anti-rotation card 3 also includes a second anti-rotation card 32 and a third anti-rotation card 33 that are spaced apart. The second anti-rotation card 32 and the third anti-rotation card 33 are both located on the same side of the first anti-rotation card 31. The first copper busbar 41 and the second copper busbar 42 pass through one of the gaps formed between the first anti-rotation card 31, the second anti-rotation card 32 and the third anti-rotation card 33 respectively.

[0044] In this optional embodiment, the coordinated arrangement of the first anti-rotation clip 31, the second anti-rotation clip 32, and the third anti-rotation clip 33 achieves targeted layered positioning of the base 43 and the two copper busbars in the stacked structure. Specifically, the second anti-rotation clip 32 and the third anti-rotation clip 33 are spaced apart and located on one side of the first anti-rotation clip 31. The three anti-rotation clips 3 form three spaced intervals, through which the first copper busbar 41 and the second copper busbar 42 pass respectively.

[0045] Specifically, taking a composite structure with the first copper busbar 41, the second copper busbar 42, and the base 43 arranged vertically from top to bottom as an example, such as... Figure 1 , Figure 4 and Figure 5 As shown, the first copper busbar 41 passes between the second anti-rotation clip 32 and the third anti-rotation clip 33 and makes corresponding contact with the second anti-rotation clip 32 and the third anti-rotation clip 33 for limiting. The second copper busbar 42 passes between the second anti-rotation clip 32 and the first anti-rotation clip 31 and makes corresponding contact with the second anti-rotation clip 32 and the first anti-rotation clip 31 for limiting. The first anti-rotation clip 31 is in close contact with the bottom base 43 for limiting. Quick positioning can be achieved without additional adjustment during use.

[0046] Optionally, such as Figure 3-5 As shown, the second anti-rotation card 32 and the third anti-rotation card 33 are both long strips, and the length direction of the second anti-rotation card 32, the length direction of the third anti-rotation card 33, and one plate surface of the first anti-rotation card 31 are all parallel to the stacking direction of the stacked structure.

[0047] In this optional embodiment, the elongated design of the second anti-rotation clip 32 and the third anti-rotation clip 33 provides them with a longer limiting contact length, which can adapt to the limiting requirements of the first copper busbar 41 and the second copper busbar 42 of different height layers in the stacked structure; moreover, the elongated structure is easy to form and easy to process and manufacture.

[0048] In addition, the length direction of the second anti-rotation clip 32, the length direction of the third anti-rotation clip 33, and one plate surface of the first anti-rotation clip 31 are all parallel to the stacking direction of the stacked structure. This arrangement ensures that the limiting force borne by the three anti-rotation clips during the limiting process remains in the circumferential direction of the stacked structure, and will not generate lateral component force along the stacking direction, thereby preventing the tooling body 1 from shifting or displacing and ensuring limiting stability.

[0049] It should be noted that when the main body 1 of the tooling is a plate-shaped structure, the length direction of the second anti-rotation clip 32 and the third anti-rotation clip 33 are both perpendicular to the plate surface of the main body 1 of the tooling and are fixedly connected. The first anti-rotation clip 31, the second anti-rotation clip 32 and the third anti-rotation clip 33 can all be integrally formed with the main body 1 of the tooling.

[0050] Optionally, such as Figure 4 As shown, the second anti-rotation clip 32 and the third anti-rotation clip 33 are equidistant from one side of the first anti-rotation clip 31, thus forming a square space between the three anti-rotation clips 3 to accommodate the roughly square stacked structure. Figure 5 As shown, the stacked structure consists of a first copper busbar 41, a second copper busbar 42, and a base 43 from top to bottom. Therefore, the protrusion heights of the second anti-rotation clip 32 and the third anti-rotation clip 33 can be designed to be the same, and both are lower than the first anti-rotation clip 31.

[0051] Optionally, such as Figure 4 As shown, the gap formed between the second anti-rotation clip 32 and the third anti-rotation clip 33 is used for the first copper busbar 41 or the second copper busbar 42 to pass through; a groove 12 is provided on the side of the tooling body 1 facing the stacked structure in the area between the second anti-rotation clip 32 and the third anti-rotation clip 33; one end of the groove 12 penetrates the inner wall of the through hole 2, and the other end penetrates the outer peripheral side of the tooling body 1, and the groove width of the groove 12 is equal to the distance between the second anti-rotation clip 32 and the third anti-rotation clip 33.

[0052] In this optional embodiment, the gap formed between the second anti-rotation clip 32 and the third anti-rotation clip 33 is used for the copper busbar 42 to pass through, for example, for the first copper busbar 41 to pass through; the groove 12 is provided so that the tooling body 1 between the second anti-rotation clip 32 and the third anti-rotation clip 33 forms a clearance space in the thickness direction, which is equivalent to making the effective contact surface of the tooling body 1 in this area relatively upward. In use, the groove 12 area covers the first copper busbar 41 of the highest layer of the stacked structure, that is, part of the first copper busbar 41 can pass through the groove 12, so that the tooling body 1 has a smaller overall height dimension while meeting the limiting function requirements. The groove 12 is preferably a straight structure.

[0053] Optionally, such as Figure 4As shown, both the second anti-rotation card 32 and the third anti-rotation card 33 are rectangular blocks, and the side of the second anti-rotation card 32 facing the third anti-rotation card 33 is parallel to the side of the third anti-rotation card 33 facing the second anti-rotation card 32.

[0054] In this optional embodiment, both the second anti-rotation clip 32 and the third anti-rotation clip 33 are rectangular blocks with their opposite sides parallel to each other. The structure is simple and easy to manufacture, and the regular block structure can provide a stable contact limiting plane, ensuring reliable limiting. Preferably, the two side walls of the groove 12 are aligned with the side walls of the second anti-rotation clip 32 and the third anti-rotation clip 33 on the corresponding sides, respectively.

[0055] Optionally, such as Figure 3 and Figure 4 As shown, the main body of the tooling 1 has a square plate structure, the through hole 2 is a square cross-section hole, and the four inner wall surfaces of the through hole 2 are parallel to the four sides of the main body of the tooling 1 respectively; one plate surface of the first anti-rotation clip 31 is coplanar with one inner wall surface of the through hole 2, and the other plate surface is coplanar with one side surface of the main body of the tooling 1; the second anti-rotation clip 32 and the third anti-rotation clip 33 are respectively located at the two corners of the main body of the tooling 1 away from the first anti-rotation clip 31.

[0056] In this optional embodiment, the tooling body 1 has a regular square plate structure, the through hole 2 is a square cross-section hole, and the four inner wall surfaces of the through hole 2 are parallel to the four sides of the tooling body 1, making the tooling body 1 have a square frame structure with high structural strength and convenient handling. One plate surface of the first anti-rotation clip 31 is coplanar with one inner wall surface of the through hole 2, and the other plate surface is coplanar with one side surface of the tooling body 1. The structure is ingeniously designed, simplifying the number of end faces and simplifying the molding and processing process. The second anti-rotation clip 32 and the third anti-rotation clip 33 are respectively located at the two corners, working in conjunction with the oppositely arranged first anti-rotation clip 31 to make full use of the space at the bottom of the tooling body 1, further simplifying and compacting the overall structural design.

[0057] Optionally, such as Figure 7 As shown, the tooling body 1 extends to one side of the stacked structure to form a protective plate 13, and one surface of the protective plate 13 is flush with the surface of the tooling body 1 away from the anti-rotation card 3.

[0058] In this optional embodiment, when there is a weak structural component at the copper busbar connection point, a protective plate 13 can be provided on one side of the fixture body 1. One surface of the protective plate 13 is flush with the surface of the fixture body 1 away from the anti-rotation clip 3 to provide cover and protection, preventing the detachable brick or other structural components of the tightening tool from falling off and damaging the weak structural component when tightening the fastening bolt 44. The thickness of the protective plate 13 can be designed to be less than the thickness of the fixture body 1 to reduce material consumption. Specifically, the side of the fixture body 1 circumferentially on which the protective plate 13 is placed is determined according to the actual situation.

[0059] Optionally, such as Figure 8 As shown, the gap formed between the second anti-rotation clip 32 and the third anti-rotation clip 33 is used for the first copper busbar 41 or the second copper busbar 42 to pass through; a reinforcing plate 15 is provided on the side of the third anti-rotation clip 33 away from the stacked structure, and the side of the third anti-rotation clip 33 facing the second anti-rotation clip 32 and the plate surface of the reinforcing plate 15 facing the second anti-rotation clip 32 are both planes and are coplanar.

[0060] In this optional embodiment, the gap formed between the second anti-rotation clip 32 and the third anti-rotation clip 33 is used for the copper busbar 42 to pass through, for example, for the first copper busbar 41 to pass through. At this time, the second anti-rotation clip 32 and the third anti-rotation clip 33 are used to limit the contact of the first copper busbar 41. A reinforcing plate 15 is provided on the side of the third anti-rotation clip 33 away from the stacked structure. The side of the third anti-rotation clip 33 facing the second anti-rotation clip 32 is coplanar with one surface of the reinforcing plate 15, providing a larger limiting contact surface.

[0061] Specifically, such as Figure 8 As shown, the reinforcing plate 15 is rectangular in shape, with its top surface flush with the surface of the tooling body 1 away from the overlapping structure, and its bottom end extending to a position lower than the third anti-rotation clip 33. The other surface of the plate is coplanar with the other side of the third anti-rotation clip 33. The reinforcing plate 15, the tooling body 1, and the third anti-rotation clip 33 can be integrally formed.

[0062] Furthermore, this utility model preferably adopts the layout design of the above-mentioned three anti-rotation clips. This design, while meeting the requirements of limiting reliability, has the advantages of simpler structure, lower processing cost, and more convenient assembly and positioning, and can adapt to the limiting requirements of most conventional stacked structures. Of course, a structure with four or more anti-rotation clips 3 can also be adopted. The implementation scheme of four anti-rotation clips can be divided into two spaced sub-anti-rotation clips by opening a dividing groove along the middle of the first anti-rotation clip 31, which together with the original second anti-rotation clip 32 and third anti-rotation clip 33 constitute the structure.

[0063] Optionally, such as Figure 9 As shown, there are two tooling bodies 1 arranged side by side, and the two tooling bodies 1 are connected by a first connecting plate 14.

[0064] In this optional embodiment, there are two tooling bodies 1 arranged side by side, connected by a first connecting plate 14. In use, the through holes 2 of the two tooling bodies 1 correspond one-to-one with the mounting holes of the two overlapping structures to be fastened. A single placement can simultaneously complete the positioning and limiting of the two copper busbar connection points, significantly improving assembly efficiency. For example, the tooling in this embodiment can simultaneously complete the positioning and limiting of the corresponding connection points of the two battery pack copper busbars and the two module terminal copper busbars.

[0065] Optionally, the copper busbar connecting the anti-rotation fixture is a one-piece molded structure. Specifically, the fixture body 1, multiple anti-rotation clips 3, extension 34, protective plate 13, and reinforcing plate 15 are all integrally molded, which can be easily manufactured through processes such as injection molding and casting.

[0066] Optionally, the tooling body 1 is also provided with a positioning structure, which is used to position and cooperate with an external fixed structure to restrict the rotation of the tooling body 1.

[0067] In this optional embodiment, while using the fixture to restrict the first copper busbar 41, the second copper busbar 42 and the base 43 from rotating relative to the fixture body 1 in the circumferential direction of the stacked structure, the positioning structure cooperates with the fixing structure to restrict the rotation of the fixture body 1, and further prevents it from rotating when the fastening bolt 44 is tightened.

[0068] Specifically, the positioning structure can be a fixing component around the connection point of the first copper busbar 41 and the second copper busbar 42. For example, if the first copper busbar 41 is a battery pack copper busbar and the second copper busbar 42 is a module terminal copper busbar, then the positioning structure can be as follows: Figure 10 The frame 522 of the battery pack case 52 shown can also be as follows: Figure 11 The end plate 511 of the battery cell module 51 shown. It should be noted that... Figure 10 The superimposed structure in is as follows Figure 5 As shown, Figure 11 The overlapping structure in the middle, such as Figure 14 As shown.

[0069] The positioning structure restricts the rotation of the tooling body 1, which means restricting the rotational movement of the tooling body 1 relative to the battery pack shell 52 during the tightening of the fastening bolts 44.

[0070] Optionally, such as Figure 3 and Figure 10 As shown, the tooling body 1 has a planar side end face 11, and the entire body of the tooling body 1 is located on the same side of the side end face 11. The side end face 11 is configured as a positioning structure for contacting and limiting the end plate 511 of the battery cell module 51 to restrict the rotation of the tooling body 1.

[0071] In this optional embodiment, the side end face 11 of the tooling body 1 contacts and abuts against the end plate 511 of the cell module 51. The end plate 511 limits the rotation of the tooling body 1 in the circumferential direction of the stacked structure (the end of the first copper busbar 41, the end of the second copper busbar 42, and the base 43 are stacked together), preventing the tooling body 1 from rotating relative to the cell module 51. This achieves rotation limit of the battery pack copper busbar 41, the module terminal copper busbar 42, and the base 43, preventing them from rotating when the fastening bolts 44 are tightened.

[0072] Optionally, such as Figure 3As shown, the side end face 11 is coplanar with the other plate face of the first anti-rotation card 31.

[0073] In this optional embodiment, the tooling body 1 and the first anti-rotation clip 31 adopt the above-described structural design, with the other plate surface of the first anti-rotation clip 31 away from the base 43 being coplanar with the side end surface 11 of the tooling body 1. During use, the other plate surface of the first anti-rotation clip 31 away from the base 43 can synchronously adhere to the end plate 511 of the battery cell module 51 with the side end surface 11 of the tooling body 1. This effectively increases the contact area between the tooling body 1 and the end plate 511, further improving the circumferential limiting stability of the tooling body 1 and preventing limiting failure due to local force displacement of the tooling body 1 when tightening bolts. Furthermore, the coplanar structure simplifies the integrated processing of the tooling body 1 and the first anti-rotation clip 31 (eliminating the need for independent planar processing of the corresponding plate surfaces of the side end surface 11 and the first anti-rotation clip 31), reduces processing errors, and makes the overall structure more compact.

[0074] Specifically, the tooling body 1 has a regular square plate structure, and one side of the tooling body 1 forms a side end face 11. That is, one side of the tooling body 1 can be used as a side end face 11 that fits with the end plate 511 of the battery cell module 51. No additional processing of the side end face 11 is required, which simplifies the processing technology.

[0075] Optionally, such as Figure 6 As shown, the first anti-rotation clip 31 extends to one side of the stacked structure to form an extension 34. The top of the extension 34 is flush with the plate surface of the tooling body 1 away from the stacked structure, which increases the area of ​​the side end face 11 and the plate surface area of ​​the first anti-rotation clip 31, thereby significantly increasing the contact area between the tooling body 1 and the first anti-rotation clip 31 and the end plate 511, and increasing the limiting stability.

[0076] Optionally, such as Figure 11-14 As shown, a positioning plate 61 is provided on one side of the tooling body 1. The positioning plate 61 is configured as a positioning structure to contact and limit the frame 522 of the battery pack shell 52 to restrict the rotation of the tooling body 1.

[0077] In this optional embodiment, the positioning plate 61 of the tooling body 1 contacts and abuts against the frame 522 of the battery pack shell 52. The frame 522 forms a rotation limit on the tooling body 1 in the circumferential direction of the stacked structure, preventing the tooling body 1 from rotating relative to the battery pack shell 52. This achieves rotation limit on the first copper busbar 41, the second copper busbar 42 and the base 43, preventing them from rotating when the fastening bolts 44 are tightened.

[0078] Optionally, such as Figure 11-13 As shown, the positioning plate 61 is spaced apart from the tooling body 1, and a second connecting plate 62 is provided between the two; the side of the positioning plate 61 away from the tooling body 1 is used to form a surface-to-surface contact limit with the inner side of the frame 522.

[0079] In this optional embodiment, since the installation point of the copper busbar is usually a long distance from the frame 522, the positioning plate 61 is supported at the frame 522 by setting a second connecting plate 62 of appropriate length, so that the plate surface of the positioning plate 61 away from the tooling body 1 can form a surface-to-surface contact limit with the inner side of the frame 522, thereby restricting the rotation of the tooling body 1.

[0080] Optionally, such as Figure 12 and Figure 13 As shown, the top of the positioning plate 61 extends and protrudes to the side away from the tooling body 1 to form a support plate 63. One surface of the support plate 63 is used to form a surface-to-surface contact limit with the top surface of the frame 522.

[0081] In this optional embodiment, a support plate 63 is provided on the side of the positioning plate 61 away from the tooling body 1. The support plate 63 contacts and limits the top surface of the frame 522. In use, it provides support for the positioning plate 61 and the second connecting plate 62, ensuring that the entire tooling can be placed horizontally.

[0082] The positioning plate 61 and the support plate 63 are preferably arranged vertically, forming an inverted L-shape. In addition, in conjunction with the above-mentioned design of the plate-shaped first anti-rotation clip 31, the positioning plate 61 and the plate body of the first anti-rotation clip 31 are arranged perpendicular to each other.

[0083] Optionally, the tooling body 1, anti-rotation clip 3, positioning plate 61, second connecting plate 62, and support plate 63 are integrally molded structures. Specifically, they can be integrally molded through processes such as injection molding and casting, making them easy to manufacture.

[0084] The assembly and use process of this fixture is as follows: After the mounting holes of the stacked structure are aligned coaxially, the main body 1 of the fixture is placed on the top end face of the stacked structure, so that the anti-rotation clips 3 respectively engage the first copper busbar 41, the second copper busbar 42 and the base 43, as follows. Figure 2 As shown; then adjust the tooling position so that the positioning plate 61 fits against the inner side of the frame 522 and the support plate 63 fits against the top surface of the frame 522; finally, tighten the fastening bolts 44 through the through hole 2 to complete the connection and fixation.

[0085] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A copper busbar connection anti-rotation fixture, characterized in that, Includes a tooling body (1), which is used to cover the top end face of the stacked structure formed by stacking the end of the first copper busbar (41), the end of the second copper busbar (42), and the base (43); The tooling body (1) has a through hole (2), which is used to provide clearance space for the tightening operation of the fastening bolts (44) of the stacked structure; The tooling body (1) is provided with a plurality of anti-rotation clips (3) at circumferential intervals along the through hole (2) on the side facing the stacked structure. The anti-rotation clips (3) are located on the outer peripheral side of the stacked structure and are used to limit the rotation of the first copper busbar (41), the second copper busbar (42) and the base (43) relative to the tooling body (1) by contact limiting.

2. The anti-rotation fixture for copper busbar connection according to claim 1, characterized in that, The anti-rotation clip (3) includes a plate-shaped first anti-rotation clip (31), one plate surface of which is used to form a surface-to-surface contact limit with the base (43) to restrict the base (43) from rotating relative to the tooling body (1).

3. The anti-rotation fixture for copper busbar connection according to claim 2, characterized in that, The anti-rotation card (3) also includes a second anti-rotation card (32) and a third anti-rotation card (33) that are spaced apart. The second anti-rotation card (32) and the third anti-rotation card (33) are both located on the same side of the first anti-rotation card (31). The first copper busbar (41) and the second copper busbar (42) pass through one of the gaps formed between the first anti-rotation card (31), the second anti-rotation card (32) and the third anti-rotation card (33).

4. The anti-rotation fixture for copper busbar connection according to claim 3, characterized in that, The second anti-rotation card (32) and the third anti-rotation card (33) are both long strips, and the length direction of the second anti-rotation card (32), the length direction of the third anti-rotation card (33), and one plate surface of the first anti-rotation card (31) are all parallel to the stacking direction of the stacked structure.

5. The anti-rotation fixture for copper busbar connection according to claim 3, characterized in that, The space between the second anti-rotation clip (32) and the third anti-rotation clip (33) is used for the first copper busbar (41) or the second copper busbar (42) to pass through; the tooling body (1) facing the stacked structure has a groove (12) in the area between the second anti-rotation clip (32) and the third anti-rotation clip (33); one end of the groove (12) penetrates the inner wall of the through hole (2), and the other end penetrates the outer peripheral side of the tooling body (1), and the groove width of the groove (12) is equal to the distance between the second anti-rotation clip (32) and the third anti-rotation clip (33).

6. The anti-rotation fixture for copper busbar connection according to claim 3, characterized in that, The tooling body (1) has a square plate structure, the through hole (2) is a square cross-section hole, and the four inner wall surfaces of the through hole (2) are parallel to the four sides of the tooling body (1) respectively. One plate surface of the first anti-rotation clip (31) is coplanar with one inner wall surface of the through hole (2), and the other plate surface is coplanar with one side surface of the tooling body (1); the second anti-rotation clip (32) and the third anti-rotation clip (33) are respectively located at two corners of the tooling body (1) away from the first anti-rotation clip (31).

7. The anti-rotation fixture for copper busbar connection according to claim 3, characterized in that, The gap between the second anti-rotation clip (32) and the third anti-rotation clip (33) is used for the first copper busbar (41) or the second copper busbar (42) to pass through; a reinforcing plate (15) is provided on the side of the third anti-rotation clip (33) away from the stacked structure, and the side of the third anti-rotation clip (33) facing the second anti-rotation clip (32) and the plate surface of the reinforcing plate (15) facing the second anti-rotation clip (32) are both planes and are coplanar.

8. The anti-rotation fixture for copper busbar connection according to claim 1, characterized in that, The copper busbar connecting anti-rotation fixture is an integrally formed structure.

9. The anti-rotation fixture for copper busbar connection according to claim 1, characterized in that, Two tooling bodies (1) are arranged side by side, and the two tooling bodies (1) are connected by a first connecting plate (14).

10. The anti-rotation fixture for copper busbar connection according to any one of claims 1-9, characterized in that, The tooling body (1) is also provided with a positioning structure, which is used to cooperate with the external fixed structure for positioning to restrict the rotation of the tooling body (1).

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