Fastener, shell and battery pack

Abstract

The utility model relates to the technical field of battery production, in particular to a fastener, a shell and a battery pack, the fastener comprises a body and a flange part, and the body is provided with a threaded hole formed in the axial direction of the body; the flange part is connected with the end of the body and protrudes outwards in the radial direction of the body, a penetrating hole communicated with the threaded hole is formed in the flange part, and the penetrating hole is bent outwards and extends to form a circle of riveting flanging. According to the fastener provided by the invention, in the riveting process, the riveting turnup deforms towards the outer side, so that the fastener can generate larger plastic deformation, the fastener is fixed on the shell wall of the battery pack, the connection tightness between the fastener and the shell wall of the battery pack is improved, and the service life of the fastener is prolonged. And the problem that the fastener is not firmly riveted and is easy to fall off is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and particularly relates to a fastener, a housing and a battery pack. Background Art

[0002] In order to improve the level of lightweight of the housing of a battery, the housing of existing batteries mostly uses aluminum profile materials. However, the aluminum profile materials have low strength, high cost, and are prone to deformation after collision, and the protection effect on the battery is limited. Rolled profile materials have the characteristics of high strength and lightweight, and the housing materials of batteries begin to use rolled profile materials to replace aluminum profile materials. However, the rolled profile materials contain high-strength steel, resulting in that ordinary carbon steel press riveting nuts cannot be fixedly connected to the housing wall using rolled profile materials.

[0003] In view of this, the present application is specifically proposed. Utility Model Content

[0004] The present application provides a fastener, a housing and a battery pack, aiming to solve the problem of how to improve the connection tightness between the fastener and the housing wall of the battery pack.

[0005] On the one hand, the present application provides a fastener, including:

[0006] A body having a threaded hole provided along the axial direction of the body;

[0007] A flange portion connected to the end of the body and protruding radially outward along the body, the flange portion being provided with a through hole communicating with the threaded hole, and a riveting flanging is formed by bending and extending outward at the through hole.

[0008] In some embodiments, the riveting flanging includes a riveting deformation portion and an anti-rotation portion arranged in sequence from outside to inside along the axial direction of the body. The riveting deformation portion is connected to the flange portion through the anti-rotation portion, and the cross-sectional area of the riveting deformation portion in the radial direction is larger than the cross-sectional area of the anti-rotation portion in the radial direction.

[0009] In some embodiments, the cross-sectional area of the riveting deformation portion in the radial direction gradually increases from inside to outside along the axial direction of the body.

[0010] In some embodiments, the cross-section of the riveting deformation portion is a regular hexagon; and / or

[0011] The cross-section of the anti-rotation portion is a regular hexagon.

[0012] In some embodiments, a first sealing layer is provided on the outer surface of the riveting deformation portion.

[0013] In some of these embodiments, the anti-rotation portion defines an anti-rotation hole communicating with the through hole, the riveting deformation portion defines a deformation hole communicating with the anti-rotation hole, and a circumferential abutting portion is formed by protruding radially outward along the body at the deformation hole.

[0014] In some of these embodiments, the cross-sectional area of the anti-rotation hole is not less than the cross-sectional area of the through hole.

[0015] In some of these embodiments, the flange portion has a first surface and a second surface oppositely arranged along the axial direction of the fastener. The first surface is arranged on the outer peripheral side of the body, the second surface is arranged on the outer peripheral side of the riveted flange, and a second sealing layer is provided on the second surface.

[0016] On the other hand, the present application also provides a housing, including:

[0017] A housing wall having a mounting hole;

[0018] The fastener as described above, which is riveted in the mounting hole.

[0019] On yet another aspect, the present application also provides a battery pack including the housing as described above.

[0020] After adopting the above technical solutions, the present application has the following beneficial effects compared with the prior art.

[0021] 1. For the fastener in the present application, during the riveting process, the riveted flange deforms outward, enabling the fastener to generate a greater amount of plastic deformation, thereby fixing the fastener on the housing wall of the battery pack, improving the connection tightness between the fastener and the housing wall of the battery pack, and avoiding the problem that the fastener is not firmly riveted and easily falls off.

[0022] 2. For the housing in the present application, by providing a circumferential riveted flange on the outer side of the fastener, during the riveting process, the riveted flange deforms under the action of an external force and closely adheres to the outer surface of the housing wall on the outer peripheral side of the mounting hole. The connection tightness between the fastener and the housing wall is high, ensuring that it will not become loose during long-term use, which is very convenient during actual use.

[0023] 3. For the battery pack in the present application, since it includes the housing in the present application, it simultaneously includes all the above advantages of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural view of the fastener in an embodiment of the present application;

[0025] Figure 2 is a bottom view of the fastener in an embodiment of the present application;

[0026] Figure 3 is Figure 2 a sectional view taken along the A-A direction in the figure;

[0027] Figure 4 is a schematic diagram of the fastener in the press riveting state in the embodiment of the present application;

[0028] Figure 5 is an exploded view of the housing in the embodiment of the present application.

[0029] In the figure: 100, housing; 110, housing wall; 111, mounting hole; 120, fastener; 121, body; 1211, threaded hole; 122, flange portion; 1221, first surface; 1222, second surface; 1223, through hole; 123, riveting flange; 1231, riveting deformation portion; 12311, deformation hole; 1232, anti-rotation portion; 12321, anti-rotation hole; 1233, abutting portion; 124, first sealing layer; 125, second sealing layer; 130, bolt. Detailed implementation manners

[0030] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] In the embodiment of the present application, a fastener 120 is provided for the housing 100 of the battery pack. For the specific structure of the fastener 120, please refer to Figures 1 to 5 , the fastener 120 includes a body 121 and a flange portion 122. Among them, the body 121 has a threaded hole 1211 arranged along the axial direction of the body 121; the flange portion 122 is connected to the end of the body 121 and protrudes radially outward along the body 121. The flange portion 122 is provided with a through hole 1223 communicating with the threaded hole 1211, and a ring of riveting flanges 123 is formed by bending and extending outward at the through hole 1223.

[0032] According to the fastener 120 of the present application, during the riveting process, the riveting flange 123 deforms outward, enabling the fastener 120 to generate a larger plastic deformation amount, so that the fastener 120 is fixed on the housing wall 110 of the battery pack, improving the connection tightness between the fastener 120 and the housing wall 110 of the battery pack, avoiding the problem that the fastener 120 is not firmly riveted and easily falls off, with a simple structure, time-saving and labor-saving, and convenient to use.

[0033] The fastener 120 can be a nut, and the press-fit nut can be press-fitted onto a base material such as any sheet. For example, the press-fit nut can be a nut press-fitted onto the housing wall 110 of the battery pack. The material of the housing wall 110 of the battery pack can be a roll-formed profile material, which has the characteristics of high strength and light weight. Since there is a ring of riveting flanges 123 provided on the outer side of the fastener 120, during the press-fitting process, the riveting flanges 123 are deformed under the action of external forces and will fit as closely as possible to the surface of the housing wall 110 of the battery pack after deformation, improving the connection tightness between the fastener 120 and the housing wall 110 of the battery pack and ensuring that it will not become loose during long-term use, which is very convenient during actual use.

[0034] As Figure 3 shown, the through hole 1223 and the threaded hole 1211 communicate with each other and are coaxially arranged. The bolt 130 sequentially passes through the through hole 1223 and the threaded hole 1211 and is screwed in cooperation with the fastener 120. As the bolt 130 is continuously screwed in, the fastener 120 gradually moves towards the housing wall 110 of the battery pack and applies pressure to the riveting flange 123 to cause plastic deformation, thereby realizing the automatic locking of the fastener 120 to the housing wall 110 of the battery pack.

[0035] As Figure 3 shown, the diameter cross-section of the through hole 1223 is a regular hexagon. When the bolt 130 sequentially passes through the through hole 1223 and the threaded hole 1211, the head of the bolt 130 is limited within the through hole 1223. The through hole 1223 is a regular hexagon, which prevents the fastener 120 from rotating during the press-fitting process, giving the fastener 120 a good anti-rotation effect and thus improving the assembly efficiency of the battery pack.

[0036] As Figures 1 to 4 shown, the riveting flange 123 includes a riveting deformation part 1231 and an anti-rotation part 1232 arranged in sequence from outside to inside along the axial direction of the body 121. The riveting deformation part 1231 is connected to the flange part 122 through the anti-rotation part 1232. The area of the diameter cross-section of the riveting deformation part 1231 is larger than the area of the diameter cross-section of the anti-rotation part 1232, enabling the riveting flange 123 to generate a greater amount of plastic deformation and ensuring a tight fit between the riveting flange 123 and the housing wall 110 of the battery pack.

[0037] As Figures 1 to 5 shown, an installation hole 111 is provided on the housing wall 110 of the battery pack. The outer contour of the anti-rotation part 1232 is adapted to the installation hole 111, which can prevent the fastener 120 from rotating relative to the housing wall 110 of the battery pack during the press-fitting process.

[0038] As Figures 1 to 3As shown, the cross-sectional area of the riveting deformation part 1231 gradually increases from the inside to the outside along the axial direction of the main body 121, enabling the riveting flange 123 to undergo a greater amount of plastic deformation. During the press riveting process, the riveting flange 123 deforms under the action of an external force, and the amount of plastic deformation of the riveting flange 123 is large. As a result, the contact area between the riveting flange 123 and the housing wall 110 is large, and the riveting flange 123 can fit more closely to the outer surface of the housing wall 110 on the outer peripheral side of the mounting hole 111.

[0039] As Figure 1 and Figure 2 shown, the cross-section of the anti-rotation part 1232 is a regular hexagon. The anti-rotation part 1232 is sleeved in the mounting hole 111. During the press riveting process, it can prevent the anti-rotation part 1232 from rotating relative to the housing wall 110 of the battery pack, enabling the fastener 120 to have an excellent anti-rotation effect.

[0040] As Figure 1 and Figure 2 shown, the cross-section of the riveting deformation part 1231 is a regular hexagon. During the press riveting process, it can prevent the riveting deformation part 1231 from rotating relative to the housing wall 110 of the battery pack, further enhancing the anti-rotation effect of the fastener 120.

[0041] As Figures 1 to 4 shown, a first sealing layer 124 is provided on the outer surface of the riveting deformation part 1231. After the riveting is completed, the riveting deformation part 1231 is in close contact with the housing wall 110 of the battery pack through the first sealing layer 124, forming a sealing structure between the riveting deformation part 1231 and the housing wall 110 of the battery pack. The structure is simple and the sealing effect is good, thus ensuring that the battery pack has excellent waterproof and dustproof effects.

[0042] Exemplarily, the first sealing layer 124 can be a glue sealing layer or a rubber ring sealing layer. Specifically, glue is coated on all or part of the outer surface of the riveting deformation part 1231. After the riveting is completed, the glue dries up to form a glue sealing layer between the outer surface of the riveting deformation part 1231 and the outer surface of the housing wall 110 of the battery pack. Or the rubber ring sealing layer can be formed by an elastic rubber ring. The elastic rubber ring is sleeved on the outer surface of the riveting deformation part 1231 and is in interference fit with the riveting deformation part 1231. After the riveting is completed, a rubber ring sealing layer is formed between the outer surface of the riveting deformation part 1231 and the outer surface of the housing wall 110 of the battery pack.

[0043] As Figures 1 to 3As shown, the anti-rotation portion 1232 defines an anti-rotation hole 12321 communicating with the through hole 1223. The riveting deformation portion 1231 defines a deformation hole 12311 communicating with the anti-rotation hole 12321. A circumferential abutting portion 1233 is formed by protruding radially outward along the body 121 at the deformation hole 12311. Among them, the radial dimension of the abutting portion 1233 is greater than the aperture of the mounting hole 111. The abutting portion 1233 can abut against the outer surface of the housing wall 110 of the battery pack, so that the fastener 120 is firmly sleeved on the housing wall 110 of the battery pack, preventing the fastener 120 from shaking and detaching from the housing wall 110 of the battery pack. The structure is simple and the limiting effect is good.

[0044] As Figures 1 to 3 shown, the cross-sectional area of the anti-rotation hole 12321 is not less than the cross-sectional area of the through hole 1223, which is beneficial for the bolt 130 to sequentially pass through the deformation hole 12311, the anti-rotation hole 12321, the through hole 1223 and the threaded hole 1211 to cooperate with the fastener 120 for screwing.

[0045] As Figure 3 shown, the flange portion 122 has a first surface 1221 and a second surface 1222 arranged oppositely along the axial direction of the fastener 120. The first surface 1221 is arranged on the outer peripheral side of the body 121, and the second surface 1222 is arranged on the outer surface of the riveting flange 123. A second sealing layer 125 is provided on the second surface 1222. After riveting, the flange portion 122 is in close contact with the housing wall 110 of the battery pack through the second sealing layer 125. The sealing structure formed between the flange portion 122 and the housing wall 110 of the battery pack is simple in structure and good in sealing effect, thus ensuring that the battery pack has excellent waterproof and dustproof effects.

[0046] Exemplarily, the second sealing layer 125 can be a glue sealing layer or a rubber ring sealing layer. Specifically, glue is coated on all or part of the outer surface of the second surface 1222 of the flange portion 122. After riveting, the glue dries to form a glue sealing layer between the second surface 1222 of the flange portion 122 and the inner surface of the housing wall 110 of the battery pack. Or the rubber ring sealing layer can be formed by an elastic rubber ring. The elastic rubber ring is sleeved on the second surface 1222 of the flange portion 122 and is in interference fit with the flange portion 122. After riveting, a rubber ring sealing layer is formed between the second surface 1222 of the flange portion 122 and the inner surface of the housing wall 110 of the battery pack.

[0047] In the embodiment of the present application, a housing 100 is further provided. For the specific structure of the housing 100, please refer to Figure 1The shell 100 includes a shell wall 110 and the above-mentioned fastener 120, wherein the shell wall 110 has a mounting hole 111, and the fastener 120 is riveted in the mounting hole 111. Exemplarily, the material of the shell wall 110 can be a rolled profile material, so that the shell wall 110 has the characteristics of high strength and light weight, thereby enhancing the protective effect of the shell 100 on the interior of the battery pack.

[0048] According to the shell 100 of the present application, a circle of riveted flange 123 is provided on the outer side of the fastener 120. During the riveting process, the riveted flange 123 is deformed by the action of external force and fits tightly to the outer surface of the shell wall 110 on the outer peripheral side of the mounting hole 111. The connection between the fastener 120 and the shell wall 110 is tightly connected, ensuring that it will not loosen during long-term use, which is very convenient in actual use.

[0049] like Figures 1 to 3 As shown, the radial cross-section of the anti-rotation portion 1232 is a regular hexagon, the mounting hole 111 is a regular hexagon, and the contour of the mounting hole 111 is compatible with the outer contour of the anti-rotation portion 1232. During the riveting process, the bolt 130 and the fastener 120 are tightened in cooperation, which can prevent the fastener 120 from rotating relative to the shell wall 110, further improve the connection tightness between the fastener 120 and the shell wall 110, ensure the structural strength of the shell 100, and thereby more efficiently protect the interior of the battery pack.

[0050] like Figure 3 and Figure 5 As shown, the outer surface of the riveted deformation part 1231 and the outer surface of the shell wall 110 are arranged opposite to each other along the axial direction of the main body 121, and a circle of first sealing layer 124 is provided on the outer surface of the riveted deformation part 1231. After riveting is completed, the first sealing layer 124 and the outer surface of the riveted deformation part 1231 and the outer surface of the shell wall 110 are tightly fitted, forming a first seal outside the shell 100, so that the shell 100 has excellent waterproof and dustproof effects, thereby extending the service life of the battery pack and improving the safety of the battery pack.

[0051] like Figure 3 and Figure 5 As shown, the second surface 1222 of the flange portion 122 and the inner surface of the shell wall 110 are arranged opposite to each other along the axial direction of the main body 121, and a second sealing layer 125 is arranged on the second surface 1222 of the flange portion 122. After riveting is completed, the second sealing layer 125 is tightly fitted with the second surface 1222 of the flange portion 122 and the inner surface of the shell wall 110, forming a second seal inside the shell 100, further improving the sealing performance of the shell 100, thereby further improving the safety of the battery pack.

[0052] In an embodiment of the present application, a battery pack is further provided, which includes the housing 100 in the above embodiment, thus including all the advantages of the housing 100, and will not be elaborated here.

[0053] The battery pack in the present application is applied to an energy storage device, and the energy storage device may be a device with a battery swapping function such as a vehicle or a construction machine.

[0054] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0055] In addition, the terms "upper" and "lower" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "upper" and "lower" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0056] In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0057] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A fastener, characterized in that: include: A body, wherein the body has a threaded hole arranged along the axial direction of the body; A flange portion is connected to the end of the body and protrudes outwardly in the radial direction of the body. The flange portion is provided with a through hole connected to the threaded hole, and the through hole is bent and extended outward to form a circle of riveted flange.

2. The fastener according to claim 1, characterized in that The riveted flange includes a riveted deformation portion and an anti-rotation portion arranged in sequence from outside to inside along the axial direction of the main body, the riveted deformation portion is connected to the flange portion through the anti-rotation portion, and the area of ​​the radial cross-section of the riveted deformation portion is greater than the area of ​​the radial cross-section of the anti-rotation portion.

3. The fastener according to claim 2, characterized in that The area of ​​the radial cross section of the riveted deformation portion gradually increases from inside to outside along the axial direction of the body.

4. The fastener according to claim 3, characterized in that The radial cross-section of the riveted deformation portion is a regular hexagon; and / or The radial cross section of the anti-rotation portion is a regular hexagon.

5. The fastener according to claim 2, characterized in that: A circle of first sealing layer is arranged on the outer surface of the riveted deformation portion.

6. The fastener according to claim 2, characterized in that The anti-rotation portion surrounds an anti-rotation hole connected to the penetration hole, and the riveted deformation portion surrounds a deformation hole connected to the anti-rotation hole. The deformation hole protrudes outwardly along the radial direction of the main body to form a circle of stopper.

7. The fastener according to claim 6, characterized in that The area of ​​the radial cross section of the anti-rotation hole is not less than the area of ​​the radial cross section of the penetration hole.

8. The fastener according to any one of claims 1 to 7, characterized in that The flange portion has a first surface and a second surface which are arranged opposite to each other along the axial direction of the fastener, the first surface is arranged on the outer peripheral side of the body, the second surface is arranged on the outer surface of the riveted flange, and a second sealing layer is arranged on the second surface.

9. A housing, characterized in that: include: a housing wall, wherein the housing wall has a mounting hole; The fastener according to any one of claims 1 to 8, wherein the fastener is riveted into the mounting hole.

10. A battery pack, characterized in that: Comprising a housing as claimed in claim 9.

Images