Threaded connector and battery pack

Abstract

The utility model provides a threaded connecting piece and battery pack, wherein the threaded connecting piece comprises a threaded rod and a flange plate, the threaded rod is used for being in threaded connection with a piece to be connected, the flange plate is provided with a press fit surface, one end of the threaded rod is connected to the press fit surface, the press fit surface is used for being pressed on the piece to be connected, and the threaded rod is connected with the flange plate. An anti-scraping cambered surface is arranged around the periphery of the pressing surface, and the anti-scraping cambered surface and the pressing surface are arranged in a tangent manner. The threaded connecting piece provided by the utility model can solve the technical problem that the threaded connecting piece is easy to cut out flying wires and chippings on a piece to be connected.

Description

Technical Field

[0001] The utility model relates to the technical field of battery assembly parts, and particularly relates to a threaded connector and a battery pack. Background Art

[0002] In the related art, using a threaded connector to connect two components to be connected together is a commonly used fixed connection method in production. Specifically, the threaded connector includes a threaded rod and a flange. The flange is connected to one end of the threaded rod. When connecting, the threaded rod passes through the preset connection holes on the two components to be connected, and the threaded rod is threadedly connected to at least one component to be connected away from the flange. The flange then presses one component to be connected against the other component, thereby realizing the fixed connection of the two components to be connected.

[0003] However, in some cases, the periphery of the flange of the threaded connector is a sharp right-angle edge, and the hardness of the threaded connector is greater than that of the component to be connected. Therefore, during the screwing process of the threaded connector, the sharp right-angle edge of the flange is likely to cut the softer component to be connected, thereby generating flying filaments and debris. Summary of the Utility Model

[0004] The embodiments of the utility model provide a threaded connector and a battery module to solve the technical problem that the threaded connector is likely to cut out flying filaments and debris on the component to be connected.

[0005] In a first aspect, the embodiments of the utility model provide a threaded connector. The threaded connector includes a threaded rod and a flange. The threaded rod is used for screwing connection with the component to be connected. The flange has a pressing surface. One end of the threaded rod is connected to the pressing surface. The pressing surface is used for pressing on the component to be connected, and an anti-scratching arc surface is disposed around the periphery of the pressing surface. The anti-scratching arc surface is tangent to the pressing surface.

[0006] Optionally, in one embodiment, the radius of the anti-scratching arc surface is greater than or equal to 0.7 mm and less than or equal to 0.9 mm.

[0007] Optionally, in one embodiment, the threaded rod has a connection end and a free end opposite to each other in the axial direction. The connection end is connected to the pressing surface, and the free end is spaced from the pressing surface. The pressing surface is also inclined relative to the threaded rod, and the pressing surface has a first connection position connected to the threaded rod and a second connection position connected to the anti-scratching arc surface. In the axial direction of the threaded rod, the distance between the first connection position and the free end is less than the distance between the second connection position and the free end.

[0008] Optionally, in one embodiment, the included angle between the pressing surface and the threaded rod is greater than or equal to 90° and less than or equal to 91°.

[0009] Optionally, in one embodiment, the flange further has an outer peripheral surface, and the anti-scratch arc surface is connected between the pressing surface and the outer peripheral surface. The ratio of the outer diameter of the anti-scratch arc surface to the outer diameter of the outer peripheral surface is greater than or equal to 0.85 and less than or equal to 0.885.

[0010] Optionally, in one embodiment, the flange further has an upper side end surface opposite to the pressing surface, and the outer peripheral surface is connected between the anti-scratch arc surface and the upper side end surface; wherein, in the axial direction of the threaded rod, the distance between the upper side end surface and the pressing surface is greater than or equal to 1.3 mm and less than or equal to 1.5 mm.

[0011] Optionally, in one embodiment, a connecting arc surface is further connected between the upper side end surface and the outer peripheral surface.

[0012] Optionally, in one embodiment, the radius of the connecting arc surface is smaller than the radius of the anti-scratch arc surface.

[0013] Optionally, in one embodiment, a screwing head is further protruded on the upper side end surface. The screwing head is used for being clamped with a screwing tool, and a first transition arc surface is connected between the screwing head and the upper side end surface.

[0014] Optionally, in one embodiment, a clamping groove is recessed at one end of the screwing head away from the upper side end surface, and a plurality of clamping sub-grooves are recessed on the inner peripheral wall of the clamping groove at intervals; the clamping sub-grooves are arc-shaped grooves, and a second transition arc surface is connected between two adjacent clamping sub-grooves.

[0015] Optionally, in one embodiment, a third transition arc surface is further connected between the threaded rod and the pressing surface.

[0016] In a second aspect, an embodiment of the present invention provides a battery pack, and the battery pack includes the threaded connection member described in any one of the above.

[0017] Advantageous effects of the embodiments of the present invention:

[0018] In the embodiment of the present invention, by providing an anti-scratch arc surface at the periphery of the pressing surface of the flange, the anti-scratch arc surface is tangentially arranged with the pressing surface. Further, in the process of tightening the threaded connection member, the anti-scratch arc surface can prevent the periphery of the flange from cutting the to-be-connected member, thereby avoiding the generation of flying filaments and debris, and effectively improving the technical problem that the threaded connection member is prone to cut out flying filaments and debris on the to-be-connected member. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a three-dimensional schematic diagram of a threaded connector provided by an embodiment of the present utility model;

[0021] Figure 2 is a three-dimensional schematic diagram of a threaded connector provided by another embodiment of the present utility model;

[0022] Figure 3 is a structural schematic diagram of a threaded connector provided by yet another embodiment of the present utility model;

[0023] Figure 4 For Figure 3 a partial structural schematic diagram of the threaded connector in;

[0024] Figure 5 is a structural cross-sectional view of a battery pack provided by an embodiment of the present utility model. Specific Embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation terms such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; and "inner" and "outer" refer to the outline of the device.

[0026] First, in the related art, using a threaded connector to connect two components to be connected together is a commonly used fixed connection method in production. Specifically, such as Figure 5As shown in the figure, taking the assembly of the battery pack 200 as an example, in order to fix the battery module 210 in the box body 220, aluminum end plates 211 are usually provided at both ends of the battery module 210. Connecting through holes 212 are formed through the aluminum end plates 211. After the battery module 210 is placed into the box body 220, a threaded connector 100 is passed through the connecting through holes 212 on the aluminum end plates 211, and the threaded connector 100 is screwed to the box body 220 (that is, the aluminum end plates 211 and the box body 220 are two to-be-connected parts that need to be fixedly connected). When the flange 20 on the threaded connector 100 presses the end plate tightly inside the box body 220, the fixing of the battery module 210 inside the box body 220 is completed.

[0027] However, when the existing threaded connector 100 is cold-heading formed, the peripheral edge of its flange 20 is formed into a sharp right-angle edge, and the hardness of the threaded connector 100 is greater than that of the aluminum end plate 211. Therefore, during the tightening process of the threaded connector 100, the sharp right-angle edge of the flange 20 is likely to cut the relatively soft aluminum end plate 211, generating flying wires and debris, resulting in the cleanliness inside the battery pack 200 not meeting the standard (Note: The battery pack 200 belongs to an electrical product, and the cleanliness inside the product is strictly controlled, especially the control of metal particles).

[0028] Therefore, to solve the above technical problems, as Figure 1 and Figure 3 shown, an embodiment of the present invention provides a threaded connector 100. The threaded connector 100 includes a threaded rod 10 and a flange 20. The threaded rod 10 is used to be screwed to the to-be-connected part. The flange 20 has a pressing surface 21. One end of the threaded rod 10 is connected to the pressing surface 21. The pressing surface 21 is used to press on the to-be-connected part, and an anti-scratching arc surface 22 is circumferentially arranged around the pressing surface 21. The anti-scratching arc surface 22 is tangentially arranged with the pressing surface 21.

[0029] Specifically, the threaded connector 100 provided in this embodiment can be a bolt, a screw or a screw. For example, in the Figure 1 shown structural solution, the threaded connector 100 is specifically a flange bolt, and the threaded connector 100 includes a connected threaded rod 10 and a flange 20.

[0030] Among them, the threaded rod 10 is in a cylindrical rod shape, and the threaded rod 10 has a connection end 11 and a free end 12 opposite to each other in the circumferential direction. The connection end 11 is fixedly connected to the flange 20, the free end 12 is spaced from the flange 20, and a guiding inclined surface 121 can be provided on the free end 12. The guiding inclined surface 121 can play a guiding role when the threaded rod 10 penetrates into the through hole on the to-be-connected part, so that the threaded rod 10 can penetrate into the through hole on the to-be-connected part faster and more smoothly; an external thread is provided on the outer periphery of the threaded rod 10, so that the threaded rod 10 can be screwed to the to-be-connected part.

[0031] It should be noted here that there are generally two components to be connected. The threaded rod 10 can be screwed to both components to be connected, or it can be screwed only to the component to be connected that is farther away from the flange 20. The specific situation depends on whether there are threaded holes 221 on both components to be connected.

[0032] For example, as Figure 5 shown, when fixing the aluminum end plate 211 on the battery module 210 to the box body 220, the aluminum end plate 211 and the box body 220 are components that need to be connected to each other. Therefore, both the aluminum end plate 211 and the box body 220 are the "components to be connected" defined in this embodiment. And in the figure, a connection through-hole 212 is provided on the aluminum end plate 211, and the inner wall of the connection through-hole 212 is not provided with threads. A threaded hole 221 corresponding to the connection through-hole 212 is provided on the box body 220, and the threaded hole 221 is provided with internal threads. Therefore, the threaded rod 10 is only screwed to the box body 220 and not to the aluminum end plate 211.

[0033] Of course, the threaded connection member 100 of the present application is not limited to being applied in the battery pack 200. When the threaded connection member 100 of the present application is applied to other fields, the threaded rod 10 of the threaded connection member 100 can be screwed to both components to be connected.

[0034] In addition, the outer diameter, length, thread shape, thread helix direction, pitch, lead, etc. of the threaded rod 10 can be flexibly designed according to actual needs and will not be specifically limited here.

[0035] As Figure 1 shown, the flange 20 is in the shape of a circular plate, and the flange 20 has a pressing surface 21 for pressing the component to be connected. The connecting end 11 of the threaded rod 10 is fixedly connected to the pressing surface 21. Specifically, the threaded rod 10 is integrally formed with the flange 20, and the threaded rod 10 is usually coaxially arranged with the flange 20. The pressing surface 21 is a plane, and the pressing surface 21 is used for pressing the component to be connected so that the flange 20 can tightly press the component to be connected.

[0036] It should be noted here that, as described above, there are usually two components to be connected, and the pressing surface 21 presses the component to be connected that is closer to the flange 20. For example, as Figure 5 shown, in the battery pack 200, the aluminum end plate 211 and the box body 220 are the two components to be connected. The threaded rod 10 passes through the aluminum end plate 211 and is screwed to the box body 220, and the pressing surface 21 of the flange 20 presses on the aluminum end plate 211.

[0037] As Figure 1 and Figure 3As shown, an anti-scratch arc surface 22 is disposed around the periphery of the pressing surface 21. Specifically, one side of the anti-scratch arc surface 22 is connected to the pressing surface 21, and the other side bends and extends in a direction away from the threaded rod 10, and the anti-scratch arc surface 22 is tangent to the pressing surface 21. Therefore, when the threaded connector 100 is tightened and the pressing surface 21 rotates while being in contact with the aluminum end plate 211, since the anti-scratch arc surface 22 is a curved surface and the anti-scratch arc surface 22 is tangent to the periphery of the pressing surface 21, during the rotation of the flange 20 relative to the aluminum end plate 211, its periphery will not cut the aluminum end plate 211, thus no aluminum filaments and debris will be generated, effectively improving the technical problem that when the bolts in the battery module 210 fix the aluminum end plate 211, it is easy to cut out filaments and debris on the aluminum end plate 211.

[0038] It should be noted here that in order to form the anti-scratch arc surface 22 at the periphery of the pressing surface 21, the threaded connector 100 can be produced by a mold, and a forming arc surface is provided at the position of the mold corresponding to the periphery of the pressing surface 21 to form the anti-scratch arc surface 22 through the forming arc surface. It can be understood that in this way, the anti-scratch arc surface 22 can be well formed at the periphery of the pressing surface 21 without increasing the production cost.

[0039] Optionally, in an embodiment, please refer to Figure 3 and Figure 4 , the radius of the anti-scratch arc surface 22 is R, and R is greater than or equal to 0.7 mm and less than or equal to 0.9 mm.

[0040] Specifically, the specific value of the radius R of the anti-scratch arc surface 22 can be 0.7 mm, 0.71 mm, 0.72 mm, 0.73 mm, 0.74 mm, 0.75 mm, 0.76 mm, 0.77 mm, 0.78 mm, 0.79 mm, 0.8 mm, 0.81 mm, 0.82 mm, 0.83 mm, 0.84 mm, 0.85 mm, 0.86 mm, 0.87 mm, 0.88 mm, 0.89 mm, 0.9 mm, etc.

[0041] It can be understood that if the radius of the anti-scratch arc surface 22 is too small, the corresponding forming arc surface on the mold also needs to be set smaller, which will increase the manufacturing difficulty of the mold and easily affect the dimensional accuracy of the forming arc surface, and further lead to poor control of the size of the anti-scratch arc surface 22. If the radius of the anti-scratch arc surface 22 is too large, the area of the pressing surface 21 will be smaller, and then the contact surface between the flange 20 and the aluminum end plate 211 will be smaller, and it is easy to occur that the flange 20 crushes (i.e., deforms) the aluminum end plate 211.

[0042] Therefore, in this embodiment, by controlling the radius of the scratch-resistant arc surface 22 within 0.7 mm to 0.9 mm, it is possible to avoid increasing the manufacturing difficulty of the mold, avoid affecting the dimensional accuracy of the formed arc surface, ensure that the size of the scratch-resistant arc surface 22 is more controllable, and also avoid the situation where the area of the pressing surface 21 is small, resulting in a small contact surface between the flange 20 and the aluminum end plate 211, and thus the flange 20 crushes the aluminum end plate 211.

[0043] Optionally, in one embodiment, reference may be made to Figure 3 , the threaded rod 10 has a connecting end 11 and a free end 12 opposite to each other in its axial direction. The connecting end 11 is connected to the pressing surface 21, and the free end 12 is spaced from the pressing surface 21. Wherein, the pressing surface 21 is also inclined relative to the threaded rod 10, and the pressing surface 21 has a first connection position 21a connected to the threaded rod 10 and a second connection position 21b connected to the scratch-resistant arc surface 22. That is, the first connection position 21a extends along the circumferential direction of the threaded rod 10, the second connection position 21b extends along the circumferential direction of the scratch-resistant arc surface 22, and in the axial direction of the threaded rod 10, the distance between the first connection position 21a and the free end 12 is less than the distance between the second connection position 21b and the free end 12.

[0044] Specifically, in this embodiment, taking the Figure 3 orientation relationship of "the flange 20 is on top and the threaded rod 10 is at the bottom" as an example, while the flange surface extends outward from the threaded rod 10, it also gradually slopes upward. At this time, the distance between the first connection position 21a and the free end 12 is less than the distance between the second connection position 21b and the free end 12. That is, in the axial direction of the threaded rod 10, the closer the position on the flange surface is to the first connection position 21a, the lower the height, and the farther the position on the flange surface is from the first connection position 21a, the higher the height. That is to say, as the threaded connector 100 is screwed, the position on the pressing surface 21 closer to the first connection position 21a will fit the aluminum end plate 211 earlier than the position on the pressing surface 21 farther from the first connection position 21a.

[0045] Therefore, it can be understood that when most positions on the pressing surface 21 are in contact with the aluminum end plate 211, there is still a certain gap between the periphery of the pressing surface 21 (i.e., the position where the second connection position 21b is located) and the aluminum end plate 211. In this way, it is possible to avoid the periphery of the pressing end face cutting the aluminum end plate 211, avoid generating flying wires and debris, and ensure the cleanliness inside the battery pack 200.

[0046] However, it can also be understood that if the upward inclination angle of the pressing surface 21 is too small, the effect of preventing the periphery of the pressing surface 21 from cutting the aluminum end plate 211 is not obvious enough. If the upward inclination angle of the pressing surface 21 is too large, the contact area between the pressing surface 21 and the aluminum end plate 211 will be too small, and the aluminum end plate 211 may be crushed. Therefore, in this embodiment, please refer to Figure 3 and Figure 4 , the included angle between the pressing surface 21 and the threaded rod 10 is A. Specifically, the included angle A is the included angle between any straight line in the pressing surface 21 and the axis of the threaded rod 10, and the included angle A is greater than or equal to 90° and less than or equal to 91°.

[0047] Specifically, the specific value of the included angle A can be 90°, 90.1°, 90.2°, 90.3°, 90.4°, 90.5°, 90.6°, 90.7°, 90.8°, 90.9°, 91°, etc.

[0048] It can be understood that in this embodiment, by controlling the included angle A between the pressing surface 21 and the threaded rod 10 to be between 90° and 91°, it is possible to avoid the situation where the anti-scratch effect is not obvious enough, and it is also possible to avoid the situation where the contact area between the pressing surface 21 and the aluminum end plate 211 is too small and the aluminum end plate 211 will be crushed.

[0049] It should be noted that during production, 90.5° can be used as the basic dimension of the included angle A, so that even if there are certain production errors, it can be ensured that the included angle A between the pressing surface 21 and the threaded rod 10 is between 90° and 91°.

[0050] Optionally, in one embodiment, please refer to Figure 3 and Figure 4 , the flange 20 also has a vertically extending outer peripheral surface 23. The anti-scratch arc surface 22 is connected between the pressing surface 21 and the outer peripheral surface 23. The outer diameter of the anti-scratch arc surface 22 is D1, and the outer diameter of the outer peripheral surface 23 is D2. The outer diameter of the outer peripheral surface 23 is the maximum outer diameter of the flange 20. In this embodiment, the ratio of D1 to D2 is K, and K is greater than or equal to 0.85 and less than or equal to 0.885.

[0051] Specifically, the specific value of K can be 0.85, 0.852, 0.855, 0.857, 0.858, 0.86, 0.862, 0.864, 0.865, 0.867, 0.869, 0.87, 0.871, 0.873, 0.875, 0.877, 0.879, 0.88, 0.881, 0.882, 0.883, 0.884, 0.885, etc.

[0052] It can be understood that if the ratio of the outer diameter of the anti-scratch arc surface 22 to the outer diameter of the outer peripheral surface 23 is less than 0.85, it means that the area of the pressing surface 21 is small, which will result in a small contact area between the flange 20 and the aluminum end plate 211, and thus it is easy to crush the aluminum end plate 211. If the ratio of the outer diameter of the anti-scratch arc surface 22 to the outer diameter of the outer peripheral surface 23 is greater than 0.885, it means that the outer diameter difference between the pressing surface 21 and the outer peripheral surface 23 is small, resulting in a small size of the anti-scratch arc surface 22, and it is difficult to control the size of the anti-scratch arc surface 22 during production, affecting the anti-scratch effect.

[0053] Therefore, in this embodiment, by controlling the ratio of the outer diameter of the anti-scratch arc surface 22 to the outer diameter of the outer peripheral surface 23 to be between 0.85 and 0.885, it can not only ensure sufficient contact area between the flange 20 and the aluminum end plate 211, avoid crushing the aluminum end plate 211, but also avoid the situation that the size of the anti-scratch arc surface 22 is too small and difficult to control during production, ensuring the anti-scratch effect.

[0054] Optionally, in an embodiment, please refer to Figure 3 and Figure 4 , the flange 20 further has an upper end face 24 opposite to the pressing surface 21, and the outer peripheral surface 23 is connected between the anti-scratch arc surface 22 and the upper end face 24. Specifically, in this embodiment, the distance between the upper end face 24 and the pressing surface 21 is the thickness of the flange 20, and in the axial direction of the threaded rod 10, the distance between the upper end face 24 and the pressing surface 21 is T, and T is greater than or equal to 1.3 mm and less than or equal to 1.5 mm.

[0055] Specifically, the specific value of T can be 1.3 mm, 1.31 mm, 1.32 mm, 1.33 mm, 1.34 mm, 1.35 mm, 1.36 mm, 1.37 mm, 1.38 mm, 1.39 mm, 1.4 mm, 1.41 mm, 1.42 mm, 1.43 mm, 1.44 mm, 1.45 mm, 1.46 mm, 1.47 mm, 1.48 mm, 1.49 mm, 1.5 mm, etc.

[0056] It can be understood that if the distance between the upper end face 24 and the pressing surface 21 is less than 1.3 mm, it means that the thickness of the flange 20 is small and the locking force on the aluminum end plate 211 is insufficient; if the distance between the upper end face 24 and the pressing surface 21 is greater than 1.5 mm, it means that the thickness of the flange 20 is large, which will result in a large volume and weight of the threaded connector 100, and the flange 20 is prone to interference with the locking tool.

[0057] Therefore, in this embodiment, by controlling the distance between the upper end face 24 and the pressing surface 21 to be between 1.3 mm and 1.5 mm, it can not only ensure that the flange 20 has sufficient thickness to better lock the aluminum end plate 211, but also avoid the excessive volume and weight of the threaded connector 100, thereby avoiding increasing the weight of the battery pack 200.

[0058] Optionally, in one embodiment, as Figure 3 shown, a connecting arc surface 25 is further connected between the upper end face 24 and the outer peripheral surface 23. In this way, when producing the threaded connector 100, burrs are avoided from being generated between the upper end face 24 and the outer peripheral surface 23, thereby further ensuring the cleanliness inside the battery pack 200.

[0059] It should be noted here that the radius of the connecting arc surface 25 can be flexibly designed according to actual situations. For example, optionally, in one embodiment, the radius of the connecting arc surface 25 is smaller than the radius of the anti-scratch arc surface 22. Based on the foregoing, the radius of the anti-scratch arc surface 22 is greater than or equal to 0.7 mm and less than or equal to 0.9 mm. Therefore, the radius of the connecting arc surface 25 can be 0.6 mm, 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm, and so on.

[0060] It can be understood that if the radius of the connecting arc surface 25 is greater than or equal to the radius of the anti-scratch arc surface 22, then in order to avoid the intersection of the connecting arc surface 25 and the anti-scratch arc surface 22 (the surface structure after intersection is relatively complex and not easy to produce), the dimension of the outer peripheral surface 23 in the axial direction of the threaded rod 10 needs to be increased, which will result in a thicker flange 20, and thus the volume and weight of the threaded connector 100 are larger.

[0061] Therefore, in this embodiment, by making the radius of the connecting arc surface 25 smaller than the radius of the anti-scratch arc surface 22, it is possible to avoid a larger thickness of the flange 20 on the basis of preventing burrs from being generated, and further avoid the situation where the volume and weight of the threaded connector 100 are larger.

[0062] Optionally, in one embodiment, as Figure 3 shown, a screwing head 30 is further protruded on the upper end face 24. The screwing head 30 is used for clamping with a screwing tool (such as a screwdriver, a wrench, etc.), and a first transition arc surface 31 is connected between the screwing head 30 and the upper end face 24. When producing the threaded connector 100, burrs can be avoided from being generated between the screwing head 30 and the upper end face 24, thereby further ensuring the cleanliness inside the battery pack 200.

[0063] It should be noted here that the specific shape of the screwing head 30 can be flexibly selected according to needs. For example, the outer shape of the screwing head 30 can be a multi-prism, such as a square head (i.e., a quadrangular prism), a hexagonal head (i.e., a hexagonal prism), etc., or it can also be a cylinder with a non-circular clamping groove 32.

[0064] Optionally, in one embodiment, as Figure 2 shown, one end of the screwing head 30 away from the upper end face 24 is recessed with a clamping groove 32. And in this embodiment, a plurality of spaced clamping sub-grooves 321 are recessed on the inner peripheral wall of the clamping groove 32. The clamping sub-grooves 321 are arc-shaped grooves, and a second transition arc surface 322 is connected between two adjacent clamping sub-grooves 321. That is to say, in this embodiment, the screwing head 30 is cylindrical, and the clamping groove 32 on the screwing head 30 is a plum blossom groove with an arc-shaped inner peripheral surface, avoiding sharp corners or right-angle structures on the screwing head 30, so as to further avoid generating burrs and ensure the cleanliness inside the battery pack 200.

[0065] Optionally, in one embodiment, as Figure 3 shown, a third transition arc surface 13 is further connected between the threaded rod 10 and the pressing surface 21. Similarly, the first transition arc surface 31 can avoid generating burrs between the threaded rod 10 and the pressing surface 21, and further ensure the cleanliness inside the battery pack 200.

[0066] In a second aspect, as Figure 5 shown, an embodiment of the present invention provides a battery pack 200, which includes a battery module 210, a box body 220, and the threaded connection member 100 according to any one of the above. Among them, the battery module 210 is installed in the box body 220, and aluminum end plates 211 are respectively provided at both ends of the battery module 210. Connection through holes 212 are provided on the aluminum end plates 211, threaded holes 221 are provided on the box body 220, the threaded rod 10 on the threaded connection member 100 passes through the connection through hole 212 and is screwed into the threaded hole 221, and the flange 20 is pressed on the aluminum end plate 211. Since the battery pack 200 of the present application adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated one by one here.

[0067] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A threaded connector, characterized in that: include: A threaded rod, the threaded rod being used for threading with a member to be connected; as well as, A flange plate, wherein the flange plate has a pressing surface, one end of the threaded rod is connected to the pressing surface, the pressing surface is used to be pressed on the part to be connected, and an anti-scratch arc surface is arranged around the periphery of the pressing surface, and the anti-scratch arc surface is arranged tangent to the pressing surface.

2. The threaded connection according to claim 1, characterized in that: The radius of the anti-scratch curved surface is greater than or equal to 0.7 mm and less than or equal to 0.9 mm.

3. The threaded connection according to claim 1, characterized in that: The threaded rod has a connecting end and a free end that are opposite to each other along the axial direction thereof, the connecting end is connected to the pressing surface, and the free end is spaced apart from the pressing surface; The pressing surface is also inclined relative to the threaded rod, and the pressing surface has a first connection position connected to the threaded rod and a second connection position connected to the anti-scratch arc surface. In the axial direction of the threaded rod, the distance between the first connection position and the free end is smaller than the distance between the second connection position and the free end.

4. The threaded connection according to claim 3, characterized in that: The included angle between the pressing surface and the threaded rod is greater than or equal to 90° and less than or equal to 91°.

5. The threaded connection according to any one of claims 1 to 4, characterized in that: The flange also has an outer peripheral surface, the anti-scratch arc surface is connected between the pressing surface and the outer peripheral surface, and the ratio of the outer diameter of the anti-scratch arc surface to the outer diameter of the outer peripheral surface is greater than or equal to 0.85 and less than or equal to 0.

885.

6. The threaded connection according to claim 5, characterized in that: The flange also has an upper end face opposite to the pressing surface, and the outer peripheral surface is connected between the anti-scratch arc surface and the upper end face; wherein, in the axial direction of the threaded rod, the distance between the upper end face and the pressing surface is greater than or equal to 1.3 mm and less than or equal to 1.5 mm.

7. The threaded connection according to claim 6, characterized in that: A connecting arc surface is also connected between the upper end surface and the outer peripheral surface.

8. The threaded connection according to claim 7, characterized in that: The radius of the connecting arc surface is smaller than the radius of the anti-scratch arc surface.

9. The threaded connection according to claim 6, characterized in that: A screwing head is also protruding from the upper end surface, and the screwing head is used for clamping with a screwing tool, and a first transition arc surface is connected between the screwing head and the upper end surface.

10. The threaded connection according to claim 9, characterized in that A clamping groove is recessed at one end of the screwing head away from the upper end surface, and a plurality of spaced-apart clamping sub-grooves are recessed on the inner peripheral wall of the clamping groove; the clamping sub-grooves are arc-shaped grooves, and a second transition arc surface is connected between two adjacent clamping sub-grooves.

11. The threaded connector according to any one of claims 1 to 4, wherein a third transition arc surface is connected between the threaded rod and the pressing surface.

12. A battery pack, characterized in that: Comprising a threaded connection as described in any one of claims 1-11.

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