Bolt combination structure, battery device and electric equipment

Abstract

The utility model discloses a bolt combination structure, a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a first structural member, a second structural member and a bolt combination structure; the first structural member is provided with a first connecting hole and a limiting groove; the second structural member is provided with a second connecting hole; the bolt combination structure comprises a bolt, an anti-rotation nut and a locking nut. The bolt comprises a head part and a rod part which are connected, the rod part penetrates through the first connecting hole and the second connecting hole, and the head part is in limiting fit with the limiting groove so as to limit rotation of the head part relative to the first structural part; the anti-rotation nut is arranged on the rod part in a sleeving mode and matched with the second structural part in a limiting mode so as to limit rotation of the anti-rotation nut relative to the second structural part. The locking nut sleeves one end, far away from the head, of the rod part. According to the technical scheme provided by the utility model, the bolt combination structure capable of preventing loosening is provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a bolt combination structure, battery device and electric equipment. BACKGROUND

[0002] In the assembly process of the battery device, it is necessary to connect each component, and the related art usually adopts a riveting, a rivet, a welding stud or the like scheme to combine each part into a whole, however, the riveting, the rivet or the welding stud is prone to loosening. SUMMARY

[0003] In view of the above problems, the application provides a bolt combination structure, a battery device and electric equipment, aiming to provide a bolt combination structure capable of preventing loosening.

[0004] The application provides a battery device, comprising a first structural member, a second structural member and a bolt combination structure; the first structural member is provided with a first connecting hole and a limiting groove; the second structural member is provided with a second connecting hole; the bolt combination structure is configured to connect the first structural member and the second structural member, and comprises a bolt, an anti-rotation nut and a locking nut; the bolt comprises a head and a rod part connected with each other, the rod part is arranged in the first connecting hole and the second connecting hole, and the head is limitedly matched with the limiting groove to limit the rotation of the head relative to the first structural member; the anti-rotation nut is threadedly sleeved on the rod part and is limitedly matched with the second structural member to limit the rotation of the anti-rotation nut relative to the second structural member; and the locking nut is threadedly sleeved on one end of the rod part away from the head.

[0005] In the technical scheme of the application, the bolt combination structure is adopted to connect the first structural member and the second structural member, and the bolt combination structure comprises a bolt, an anti-rotation nut and a locking nut. When connected, first, the rod part of the bolt is arranged in the first connecting hole of the first structural member, and the head of the bolt is limitedly matched with the limiting groove of the first structural member to limit the rotation of the head relative to the first structural member; then the anti-rotation nut is screwed into the rod part of the bolt to prevent the bolt from falling off; then the rod part of the bolt is arranged in the second connecting hole of the second structural member, and the anti-rotation nut is limitedly matched with the second structural member to limit the rotation of the anti-rotation nut relative to the second structural member; finally, the locking nut is screwed into the rod part of the bolt to achieve locking, and finally the first structural member and the second structural member are connected into a non-loosening structure by the bolt combination structure.

[0006] In some embodiments, the limiting groove is arranged on one side of the first structural member away from the second structural member. In this way, the head and the rod part are on the same axis, and when the head is inserted into the limiting groove during the process of passing the rod part of the bolt through the first connecting hole, the bolt and the first structural member can be installed in place, thereby realizing the quick installation of the bolt and the first structural member.

[0007] In some embodiments, the first structure is provided with a protrusion on the side close to the second structure, and the protrusion is arranged opposite to the limiting groove. Such a design, for the first structure with a relatively thin thickness, when the limiting groove is arranged on the side of the first structure away from the second structure, the thickness of the first structure corresponding to the position of the limiting groove will be thinner. Therefore, in this embodiment, the protrusion is arranged on the side of the first structure close to the second structure, and the design of the protrusion can increase the thickness of the first structure corresponding to the position of the limiting groove, thereby improving the strength of the first structure itself, so as to realize the effective connection of the bolt and the first structure.

[0008] In some embodiments, the limiting groove is a rectangular groove, and the outer contour of the head is a rectangle. Such a design, in cooperation with the rectangular groove and the head with a rectangular outer contour, can achieve better limiting effect.

[0009] In some embodiments, the anti-rotation nut is engaged with the second structure. Compared with clamping, magnetic attraction and other methods, in this embodiment, the anti-rotation nut and the second structure are engaged by teeth, which not only has a simple structure, but also can achieve better limiting effect and improve the anti-rotation effect.

[0010] In some embodiments, the anti-rotation nut includes a locking segment and an anti-rotation segment; the locking segment is threadedly sleeved on the rod portion and located between the first structure and the second structure; the anti-rotation segment is connected to the end of the locking segment away from the head and penetrates the second connecting hole, and the anti-rotation segment is provided with external teeth; the hole wall of the second connecting hole is provided with internal teeth, and the internal teeth are engaged with the external teeth. Such a design can adopt the locking segment to threadedly cooperate with the bolt to lock the bolt on the first structure, so as to prevent the bolt from falling off, and at the same time, the anti-rotation segment can be penetrated into the second connecting hole to realize anti-rotation through the cooperation of the external teeth of the anti-rotation segment and the internal teeth of the second connecting hole, thereby achieving better anti-falling and anti-rotation effects.

[0011] In some embodiments, the end of the anti-rotation segment away from the locking segment protrudes from the side of the second structure away from the first structure. Such a design, since the first structure and the second structure are composite material or carbon fiber material, the material of the first structure and the second structure is relatively soft, so that the end of the anti-rotation segment away from the locking segment protrudes from the side of the second structure away from the first structure. When the locking nut is sleeved on the rod portion of the bolt, the locking nut can be rigidly supported by the anti-rotation segment without soft connection, so as to improve the locking effect of the locking nut, and at the same time, the risk of cracking of the locking nut directly pressed on the second structure can be avoided.

[0012] In some embodiments, a distance between the end of the anti-rotation segment away from the locking segment and the side of the second structural member away from the first structural member is defined as H, and 0.1mm≤H≤0.3mm is satisfied. With such a design, by controlling the distance between the end of the anti-rotation segment away from the locking segment and the side of the second structural member away from the first structural member to be between 0.1mm and 0.3mm, the anti-rotation segment has sufficient rigid support effect on the locking nut, while the gap between the second structural member and the locking nut is avoided from being too large, thereby improving the connection reliability of the second structural member.

[0013] In some embodiments, the surfaces of the bolt, the anti-rotation nut and the locking nut are provided with an isolation coating, or the bolt, the anti-rotation nut and the locking nut are titanium alloy material pieces. With such a design, when the first structural member or the second structural member is a carbon fiber piece, the isolation coating or the titanium alloy material piece design can solve the problem of potential difference corrosion between the bolt combination structure and the carbon fiber piece.

[0014] In some embodiments, at least one of the first structural member and the second structural member is a composite material piece or a carbon fiber piece. With such a design, the bolt combination structure can be used to connect the first structural member and the second structural member, and during the connection process, the problems of cracking the composite material and the carbon fiber structure caused by using pressure riveting, and the problem of space limitation caused by using pull riveting or welding studs, thereby making the bolt combination structure suitable for connecting the composite material and the carbon fiber interface.

[0015] In some embodiments, the first structural member is one of a battery shell and a circuit board, and the second structural member is the other of the battery shell and the circuit board. With such a design, the bolt combination structure can be used to connect the battery shell and the circuit board, and the battery shell and the circuit board are not damaged, thereby achieving effective connection of the battery shell and the circuit board.

[0016] The application also provides a bolt combination structure configured to connect a first structural member and a second structural member, the bolt combination structure comprising a bolt, an anti-rotation nut and a locking nut; the bolt comprises a head and a shank connected together, the shank is arranged through a first connecting hole of the first structural member and a second connecting hole of the second structural member, and the head is in limiting fit with a limiting groove of the first structural member to limit rotation of the head relative to the first structural member; the anti-rotation nut is threadedly sleeved on the shank and is in limiting fit with the second structural member to limit rotation of the anti-rotation nut relative to the second structural member; and the locking nut is threadedly sleeved on an end of the shank away from the head.

[0017] The application also provides an electric device comprising the above battery device.

[0018] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear and understandable, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0020] Figure 1 The structure diagram during the process of inserting the rod part of the bolt into the first structural member for an embodiment of the battery device of the present application;

[0021] Figure 2 The structure diagram during the process of screwing the anti-rotation nut into the rod part of the bolt for an embodiment of the battery device of the present application;

[0022] Figure 3 The sectional view of Figure 2 ;

[0023] Figure 4 The structure diagram after screwing the anti-rotation nut into the rod part of the bolt for an embodiment of the battery device of the present application;

[0024] Figure 5 The sectional view of Figure 4 ;

[0025] Figure 6 The structure diagram during the process of inserting the rod part of the bolt into the second structural member for an embodiment of the battery device of the present application;

[0026] Figure 7 The sectional view of Figure 6 ;

[0027] Figure 8 The structure diagram after inserting the rod part of the bolt into the second structural member for an embodiment of the battery device of the present application;

[0028] Figure 9 The sectional view of Figure 8 ;

[0029] Figure 10 The structure diagram during the process of screwing the locking nut into the rod part of the bolt for an embodiment of the battery device of the present application;

[0030] Figure 11 is a sectional view; Figure 10 is a sectional view;

[0031] Figure 12 is a structure schematic view of the embodiment of the battery device of the present application after the locking nut is screwed into the stem of the bolt;

[0032] Figure 13 is a sectional view; Figure 12 is a sectional view;

[0033] Figure 14 is a sectional view; Figure 13 is a partial enlarged view of A in FIG. 8.

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] Reference Name Reference Name 100 Battery device 13 Lock nut 10 Bolt combination structure 20 First structural member 11 Bolt 21 First connecting hole 111 Head 22 Limiting groove 112 Rod part 23 Protrusion 12 Anti-rotation nut 30 Second structural member 121 Locking section 31 Second connecting hole 122 Anti-rotation section 32 Internal tooth 1221 External tooth

[0036] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with the embodiments. DETAILED DESCRIPTION

[0037] The embodiments of the technical scheme of the present application will be described in detail below in combination with the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0040] In this paper, the reference to "embodiments" means that the specific features, structures or properties described in combination with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0042] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] The battery device mentioned in the art is also called battery, which can be divided into primary battery and rechargeable battery according to whether it can be charged. The common types of rechargeable batteries at present are: lead-acid battery, nickel-hydrogen battery and lithium-ion battery. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for such purposes is relatively low, but has larger output, charging current and longer service life, but the cost is higher.

[0045] The battery described in the embodiments of the present application refers to a rechargeable battery. Hereinafter, the embodiments disclosed in the present application will be mainly described taking lithium-ion batteries as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate device to power the device.

[0046] The battery mentioned in the embodiments disclosed in the present application refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity. The battery cell is the basic unit in the battery, which can be generally classified into cylindrical battery cells, cuboid battery cells and soft-pack battery cells in a packaged manner. In the following, the embodiments will be mainly described with respect to the cuboid battery cells. It should be understood that the embodiments described in the following are also applicable to the cylindrical battery cells or the soft-pack battery cells in some aspects.

[0047] The battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolyte and a separator. The lithium ion battery mainly relies on the movement of lithium ions between the positive electrode sheet and the negative electrode sheet to work. In the cylindrical battery cell, the thin film structure of the three layers is wound into a cylindrical electrode assembly, while in the cuboid battery cell, the thin film structure is wound or stacked into an electrode assembly having a substantially cuboid shape.

[0048] In a general battery cell structure, the battery cell includes a housing, an electrode assembly and an electrolyte. The electrode assembly is accommodated in the housing of the battery cell, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The housing includes a housing body and an opening. The end cap is arranged at the opening to close the accommodation cavity. In addition to the electrode assembly, the electrolyte is also accommodated in the accommodation cavity. The positive electrode sheet and the negative electrode sheet in the electrode assembly include tabs. In order to avoid fusing caused by a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The tabs are electrically connected to the electrode terminals located outside the battery cell through the connecting members, and the electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For the cuboid battery cell, the electrode terminals are generally arranged in the end cap portion. A plurality of battery cells are connected in series and / or parallel together via the electrode terminals to be applied to various application occasions.

[0049] The battery device provided by the embodiments of the present application can be a power source for an electric device. The electric device can be a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer.

[0050] To facilitate the bolt combination structure and the battery device provided by the embodiments of the present application, first, the application scenario of the bolt combination structure and the battery device is introduced. The battery device is a battery pack on an electrical equipment, and the bolt combination structure is a component of the battery pack. The battery pack mainly comprises a first structural member, a second structural member, and a bolt combination structure for connecting the first structural member and the second structural member, so as to realize the assembly of the battery pack.

[0051] In the assembly process of the battery device, it is necessary to connect each component. The related art usually adopts a scheme of press riveting, pull riveting, or welding studs to combine each part into a whole. However, the press riveting, pull riveting, or welding stud mode is prone to the risk of loosening.

[0052] Based on the above problems, the utility model provides a battery device 100, which aims to provide a bolt combination structure 10 that can prevent loosening. The battery device 100 comprises a first structural member 20, a second structural member 30, and a bolt combination structure 10 for connecting the first structural member 20 and the second structural member 30. The following will be described in detail in combination with specific drawings and embodiments.

[0053] Please refer to Figures 1 to 13 In an embodiment of the utility model, the battery device 100 comprises a first structural member 20, a second structural member 30, and a bolt combination structure 10. The first structural member 20 is provided with a first connecting hole 21 and a limiting groove 22. The second structural member 30 is provided with a second connecting hole 31. The bolt combination structure 10 is configured to connect the first structural member 20 and the second structural member 30. The bolt combination structure 10 comprises a bolt 11, an anti-rotation nut 12, and a locking nut 13. The bolt 11 comprises a head 111 and a rod 112 connected with each other. The rod 112 is arranged in the first connecting hole 21 and the second connecting hole 31. The head 111 is limitedly matched with the limiting groove 22 to limit the rotation of the head 111 relative to the first structural member 20. The anti-rotation nut 12 is threadedly sleeved on the rod 112 and is limitedly matched with the second structural member 30 to limit the rotation of the anti-rotation nut 12 relative to the second structural member 30. The locking nut 13 is threadedly sleeved on one end of the rod 112 away from the head 111.

[0054] In the embodiment, the first structural member 20 and the second structural member 30 can be composite material members or carbon fiber members, or can be structural members such as steel plates and aluminum materials.

[0055] In actual application, the first structural member 20 and the second structural member 30 can be in the shapes of plates, blocks, cylinders, columns, strips, etc. The bolt combination structure 10 can be used to connect the first structural member 20 and the second structural member 30.

[0056] In actual application, the limiting groove 22 arranged on the first structural part 20 can be a rectangular groove, or an elliptical, triangular or other shaped groove; and correspondingly, the outer contour shape of the head 111 of the bolt 11 can also be rectangular, or elliptical, triangular or other shape, as long as the head 111 can be limited from rotating relative to the first structural part 20 under the limiting cooperation between the limiting groove 22 and the head 111, so as to achieve the anti-rotation effect.

[0057] In addition, the limiting groove 22 can be arranged on the side of the first structural part 20 away from the second structural part 30, or on the side edge or other position of the first structural part 20, as long as the head 111 of the bolt 11 can be installed into the limiting groove 22 and limited by the limiting groove 22.

[0058] The anti-rotation nut 12 is threadedly sleeved on the rod portion 112 and limited by the second structural part 30. It can be understood that when the anti-rotation nut 12 is screwed into the rod portion 112 of the bolt 11 and the rod portion 112 of the bolt 11 passes through the second connecting hole 31 of the second structural part 30, the design of the anti-rotation nut 12 can lock the bolt 11 on the first structural part 20 on the one hand, so as to achieve the non-falling of the bolt 11, and on the other hand, can be limited by the second structural part 30, so as to limit the rotation of the anti-rotation nut 12 relative to the second structural part 30, so as to achieve the anti-rotation effect.

[0059] In actual application, the anti-rotation nut 12 and the second structural part 30 can be limited by meshing, or by clamping, magnetic attraction or other ways, as long as the rotation of the anti-rotation nut 12 relative to the second structural part 30 can be limited, so as to achieve the anti-rotation effect.

[0060] It should be noted that for the scheme that the thread specification of the bolt 11 is M6, when the anti-rotation nut 12 is screwed into the rod portion 112 of the bolt 11, a torque not greater than 3N.m can be used to screw it on the rod portion 112 of the bolt 11 at the beginning, at which time the bolt 11 can be locked on the first structural part 20 by the anti-rotation nut 12, so as to achieve the non-falling of the bolt 11, and the anti-rotation nut 12 can continue to rotate and will not crack the first structural part 20 when there is a need for subsequent tightening. Of course, for the bolt 11 with different thread specifications, different torques will be used to screw the anti-rotation nut 12 on the rod portion 112 of the bolt 11 at the beginning, as long as the anti-rotation nut 12 can lock the bolt 11 on the first structural part 20 and has a margin for further rotation.

[0061] The locking nut 13 is threadedly sleeved on the end of the rod portion 112 away from the head 111. It can be understood that the locking nut 13 is a normal nut, which can be screwed on the rod portion 112 of the bolt 11 using a normal torque.

[0062] In conclusion, in the technical scheme of the embodiment of the application, the technical scheme of the utility model discloses a bolt combination structure 10 for connecting the first structural member 20 and the second structural member 30, the bolt combination structure 10 comprises a bolt 11, an anti-rotation nut 12 and a locking nut 13.In the process of connection, first, the shank portion 112 of the bolt 11 is arranged on the first connecting hole 21 of the first structural member 20, and the head portion 111 of the bolt 11 is limitedly matched with the limiting groove 22 of the first structural member 20, so as to limit the rotation of the head portion 111 relative to the first structural member 20; then the anti-rotation nut 12 is screwed into the shank portion 112 of the bolt 11, so that the bolt 11 does not fall off; then the shank portion 112 of the bolt 11 is arranged on the second connecting hole 31 of the second structural member 30, and the anti-rotation nut 12 is limitedly matched with the second structural member 30, so as to limit the rotation of the anti-rotation nut 12 relative to the second structural member 30; finally, the locking nut 13 is screwed into the shank portion 112 of the bolt 11, so as to realize locking, and finally the bolt combination structure 10 is used to connect the first structural member 20 and the second structural member 30 into a non-detachable structure.

[0063] Please refer to Figure 1 、 Figure 2 In an embodiment of the utility model, the limiting groove 22 is arranged on the side of the first structural member 20 away from the second structural member 30.

[0064] Such design can make the head portion 111 and the shank portion 112 be on the same axis, and in the process of passing the shank portion 112 of the bolt 11 through the first connecting hole 21, when the head portion 111 extends into the limiting groove 22, the bolt 11 and the first structural member 20 can be installed in place, so as to realize the quick installation of the bolt 11 and the first structural member 20.

[0065] Please refer to Figure 2 In an embodiment of the utility model, the side of the first structural member 20 close to the second structural member 30 is provided with a protrusion 23, and the protrusion 23 is arranged opposite to the limiting groove 22.

[0066] It can be understood that, for the first structural member 20 with relatively thin thickness, when the limiting groove 22 is arranged on the side of the first structural member 20 away from the second structural member 30, the thickness of the first structural member 20 corresponding to the position of the limiting groove 22 will be thinner, therefore, in this embodiment, the side of the first structural member 20 close to the second structural member 30 is provided with a protrusion 23, and the design of the protrusion 23 can increase the thickness of the first structural member 20 corresponding to the position of the limiting groove 22, so as to improve the strength of the first structural member 20 itself, thereby realizing the effective connection of the bolt 11 and the first structural member 20.

[0067] It should be noted that for the first structure 20 with a relatively large thickness, the limiting groove 22 is arranged on the side of the first structure 20 away from the second structure 30, and when the thickness of the first structure 20 corresponding to the position of the limiting groove 22 is also large enough, the protrusion 23 need not be arranged on the side of the first structure 20 close to the second structure 30.

[0068] Please refer to Figure 1 , Figure 2 In an embodiment of the present application, the limiting groove 22 is a rectangular groove, and the outer contour of the head 111 is rectangular. With the cooperation of the rectangular groove and the head 111 with a rectangular outer contour, a better limiting effect can be achieved.

[0069] Please refer to Figures 4 to 9 In an embodiment of the present application, the anti-rotation nut 12 is engaged with the second structure 30.

[0070] With this design, compared with the clamping and magnetic attraction methods, the anti-rotation nut 12 and the second structure 30 are engaged by the teeth in the present embodiment, which not only has a simple structure, but also can achieve a better limiting effect and improve the anti-rotation effect.

[0071] In actual application, the anti-rotation nut 12 can be at least partially inserted through the second connecting hole 31 of the second structure 30 to achieve engagement; or a protruding portion can be arranged on the side of the second structure 30 close to the first structure 20, and the protruding portion is engaged with the anti-rotation nut 12.

[0072] Please refer to Figures 4 to 9 In an embodiment of the present application, the anti-rotation nut 12 includes a locking section 121 and an anti-rotation section 122; the locking section 121 is threadedly sleeved on the rod portion 112 and located between the first structure 20 and the second structure 30; the anti-rotation section 122 is connected to the end of the locking section 121 away from the head 111 and inserted through the second connecting hole 31, and the anti-rotation section 122 is provided with external teeth 1221; the hole wall of the second connecting hole 31 is provided with internal teeth 32, and the internal teeth 32 are engaged with the external teeth 1221.

[0073] It can be understood that the locking section 121 is located between the first structure 20 and the second structure 30, and the anti-rotation section 122 is inserted in the second connecting hole 31 of the second structure 30, that is, the outer diameter of the locking section 121 is larger than the outer diameter of the anti-rotation section 122.

[0074] With this design, the locking section 121 can be threadedly engaged with the bolt 11 to lock the bolt 11 on the first structure 20, so that the bolt 11 cannot be detached, and the anti-rotation section 122 can be inserted in the second connecting hole 31 to achieve anti-rotation through the cooperation of the external teeth 1221 of the anti-rotation section 122 and the internal teeth 32 of the second connecting hole 31, thereby achieving better anti-dropping and anti-rotation effects.

[0075] It should be noted that since the outer teeth 1221 on the anti-rotation segment 122 are multiple teeth, and the inner teeth 32 on the second connecting hole 31 are also multiple teeth, in the initial state of passing the anti-rotation segment 122 through the second connecting hole 31, the outer teeth 1221 and the inner teeth 32 cannot be 100% meshed. Since the anti-rotation nut 12 is initially tightened on the shank 112 of the bolt 11 with a small torque, the anti-rotation nut 12 can lock the bolt 11 on the basis of the first structural member 20, and the anti-rotation nut 12 has a margin for further rotation. Therefore, the anti-rotation nut 12 can be further tightened in the tightening direction until the outer teeth 1221 and the inner teeth 32 are fully meshed.

[0076] Please refer to Figures 10 to 14 In an embodiment of the present application, the end of the anti-rotation segment 122 away from the locking segment 121 protrudes from the side of the second structural member 30 away from the first structural member 20.

[0077] Such a design, since the first structural member 20 and the second structural member 30 are composite material members or carbon fiber members, the material of the first structural member 20 and the second structural member 30 is relatively soft. Therefore, by making the end of the anti-rotation segment 122 away from the locking segment 121 protrude from the side of the second structural member 30 away from the first structural member 20, when the locking nut 13 is sleeved on the shank 112 of the bolt 11, the anti-rotation segment 122 can rigidly support the locking nut 13 without soft connection, thereby improving the locking effect of the locking nut 13, and also avoiding the risk of cracking caused by directly pressing the locking nut 13 on the second structural member 30.

[0078] Please refer to Figure 14 In an embodiment of the present application, the distance between the end of the anti-rotation segment 122 away from the locking segment 121 and the side of the second structural member 30 away from the first structural member 20 is defined as H, and it satisfies: 0.1mm≤H≤0.3mm.

[0079] Such a design, by controlling the distance between the end of the anti-rotation segment 122 away from the locking segment 121 and the side of the second structural member 30 away from the first structural member 20 to be between 0.1mm and 0.3mm, the anti-rotation segment 122 has sufficient rigid support effect on the locking nut 13, and at the same time, the gap between the second structural member 30 and the locking nut 13 is avoided to be too large, thereby improving the connection reliability of the second structural member 30.

[0080] As some examples, the distance between the end of the anti-rotation segment 122 away from the locking segment 121 and the side of the second structural member 30 away from the first structural member 20 can be 0.1mm, 0.15mm, 0.18mm, 0.2mm, 0.25mm, 0.3mm, etc.

[0081] Please refer to Figure 13 In an embodiment of the present application, the surfaces of the bolt 11, the anti-rotation nut 12 and the locking nut 13 are provided with an isolation coating; or the bolt 11, the anti-rotation nut 12 and the locking nut 13 are titanium alloy material pieces.

[0082] Such a design, by providing an isolation coating on the surface of the bolt combination structure 10 or designing the bolt combination structure 10 as a titanium alloy material piece, when the first structural piece 20 or the second structural piece 30 is a carbon fiber piece, the design of the isolation coating or the titanium alloy material piece can solve the problem of potential difference corrosion between the bolt combination structure 10 and the carbon fiber piece.

[0083] In actual application, the isolation coating can be nylon glue, resin, rubber, etc.

[0084] It should be noted that the low-altitude economy is developing rapidly at present, and the battery pack on the airplane has high requirements for lightweight, so the battery pack used on the airplane uses a large amount of composite material and carbon fiber structure. In the past, the battery pack on the automobile was generally connected to the profile or sheet metal through schemes such as press riveting, pull riveting, and welding studs to form an integral whole. However, when the composite material and carbon fiber interface are connected by the press riveting, pull riveting or welding stud mode, the composite material and carbon fiber structure may be cracked, or due to space limitations, the pull riveting or welding stud mode cannot be used, so the connection of the composite material and carbon fiber interface is not applicable.

[0085] Based on this, please refer to Figure 13 In an embodiment of the present application, at least one of the first structural piece 20 and the second structural piece 30 is a composite material piece or a carbon fiber piece.

[0086] Such a design can achieve the connection of the first structural piece and the second structural piece by using the bolt combination structure, and in the connection process, the problem of cracking the composite material and carbon fiber structure caused by the press riveting mode does not occur, and the problem of space limitation caused by the pull riveting or welding stud mode does not occur, so the bolt combination structure provided by the present application is suitable for the connection of the composite material and carbon fiber interface.

[0087] In the present embodiment, at least one of the first structural piece 20 and the second structural piece 30 is a composite material piece or a carbon fiber piece. It can be understood that the first structural piece 20 and the second structural piece 30 can both be composite material pieces, or both be carbon fiber pieces; or one of the first structural piece 20 and the second structural piece 30 is a composite material piece or a carbon fiber piece.

[0088] It should be noted that the composite material piece can be a non-metal material structural piece, for example, a polycarbonate / acrylate composite material piece, a glass fiber composite material piece, etc.

[0089] Referring to Figure 13 In an embodiment of the present application, the first structural member 20 is one of a battery shell and a circuit board, and the second structural member 30 is the other of the battery shell and the circuit board.

[0090] Such a design can realize the connection between the battery shell and the circuit board by using the bolt combination structure 10, and meanwhile, the battery shell and the circuit board are not damaged, so as to realize the effective connection of the battery shell and the circuit board.

[0091] Of course, in other embodiments, the bolt combination structure 10 can also be used to connect two of the cover plate, the chassis, the cross beam, the bottom guard plate and other structures.

[0092] Referring to Figures 1 to 13 The present application also provides a bolt combination structure 10, which is configured to connect a first structural member 20 and a second structural member 30, and the bolt combination structure 10 comprises a bolt 11, an anti-rotation nut 12 and a locking nut 13; the bolt 11 comprises a head 111 and a rod 112 connected with each other, the rod 112 is arranged in a first connecting hole 21 of the first structural member 20 and a second connecting hole 31 of the second structural member 30, the head 111 is limitedly matched with a limiting groove 22 of the first structural member 20 to limit the rotation of the head 111 relative to the first structural member 20; the anti-rotation nut 12 is threadedly sleeved on the rod 112 and is limitedly matched with the second structural member 30 to limit the rotation of the anti-rotation nut 12 relative to the second structural member 30; and the locking nut 13 is threadedly sleeved on an end of the rod 112 away from the head 111.

[0093] According to some embodiments of the present application, the present application provides a battery device 100 comprising a bolt combination structure 10, referring to Figures 1 to 13The battery device 100 further comprises a first structural member 20 and a second structural member 30, the first structural member 20 is provided with a first connecting hole 21 and a limiting groove 22, and the second structural member 30 is provided with a second connecting hole 31, at least one of the first structural member 20 and the second structural member 30 is a composite material member or a carbon fiber member; the bolt combination structure 10 is configured to connect the first structural member 20 and the second structural member 30, and the bolt combination structure 10 comprises a bolt 11, an anti-rotation nut 12 and a locking nut 13; the bolt 11 comprises a head 111 and a rod 112 connected with each other, the rod 112 is arranged in the first connecting hole 21 and the second connecting hole 31, and the head 111 is limitedly matched with the limiting groove 22 to limit the rotation of the head 111 relative to the first structural member 20; the anti-rotation nut 12 comprises a locking segment 121 and an anti-rotation segment 122; the locking segment 121 is threadedly sleeved on the rod 112 and located between the first structural member 20 and the second structural member 30; the anti-rotation segment 122 is connected to an end of the locking segment 121 away from the head 111 and arranged in the second connecting hole 31, and the anti-rotation segment 122 is provided with external teeth 1221; the hole wall of the second connecting hole 31 is provided with internal teeth 32, and the internal teeth 32 are engaged with the external teeth 1221 to limit the rotation of the anti-rotation nut 12 relative to the second structural member 30; and the locking nut 13 is threadedly sleeved on one end of the rod 112 away from the head 111.

[0094] In the technical scheme of the embodiment of the application, the bolt combination structure 10 is adopted to connect the first structural member 20 and the second structural member 30, and the bolt combination structure 10 comprises the bolt 11, the anti-rotation nut 12 and the locking nut 13. During the connection, firstly, the rod 112 of the bolt 11 is arranged in the first connecting hole 21 of the first structural member 20, and the head 111 of the bolt 11 is limitedly matched with the limiting groove 22 of the first structural member 20 to limit the rotation of the head 111 relative to the first structural member 20; then the anti-rotation nut 12 is screwed into the rod 112 of the bolt 11 to prevent the bolt 11 from falling off; then the rod 112 of the bolt 11 is arranged in the second connecting hole 31 of the second structural member 30, and the external teeth 1221 on the anti-rotation segment 122 of the anti-rotation nut 12 are engaged with the internal teeth 32 on the second connecting hole 31 of the second structural member 30 to limit the rotation of the anti-rotation nut 12 relative to the second structural member 30; finally, the locking nut 13 is screwed into the rod 112 of the bolt 11 to realize locking, and finally the first structural member 20 and the second structural member 30 are connected as a non-detachable structure by the bolt combination structure 10. Therefore, the bolt combination structure 10 is adopted to connect the first structural member 20 and the second structural member 30, and during the connection process, the problems of cracking the composite material and the carbon fiber structure caused by the press riveting mode do not occur, and the problem of limited space caused by the pull riveting or welding stud mode and unable to connect does not occur, so the bolt combination structure 10 provided by the scheme is suitable for the connection of the composite material and the carbon fiber interface.

[0095] The utility model discloses still a kind of electric equipment, and electric equipment includes battery device 100, the specific structure of this battery device 100 refers to above-mentioned embodiment, since the utility model uses all technical solutions of above-mentioned all embodiments, thus at least have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer repeat.

[0096] The above-mentioned is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the contents of drawings, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.

Claims

1. A battery device, characterized by, The first structure is provided with a first connecting hole and a limiting slot, and the second structure is provided with a second connecting hole. The bolt combination structure is configured to connect the first structure and the second structure, and comprises: a bolt comprising a head and a shank connected together, the shank being arranged through the first connecting hole and the second connecting hole, and the head being in limiting cooperation with the limiting slot to limit rotation of the head relative to the first structure; a rotation-preventing nut being sleeved on the shank and in limiting cooperation with the second structure to limit rotation of the rotation-preventing nut relative to the second structure; a locking nut being sleeved on the shank away from the head.

2. The battery device of claim 1, wherein The limiting slot is arranged on a side of the first structure away from the second structure.

3. The battery device of claim 2, wherein A protrusion is arranged on a side of the first structure close to the second structure, and the protrusion is arranged opposite to the limiting slot.

4. The battery device of claim 1, wherein The limiting slot is a rectangular slot, and an outer contour of the head is rectangular.

5. The battery device according to any one of claims 1 to 4, wherein The rotation-preventing nut is in engagement with the second structure.

6. The battery device of claim 5, wherein The rotation-preventing nut comprises: a locking section being threadedly sleeved on the shank and located between the first structure and the second structure; a rotation-preventing section being connected to an end of the locking section away from the head and arranged through the second connecting hole, the rotation-preventing section being provided with external teeth; a hole wall of the second connecting hole is provided with internal teeth, and the internal teeth are in engagement with the external teeth.

7. The battery device of claim 6, wherein An end of the rotation-preventing section away from the locking section protrudes from a side of the second structure away from the first structure.

8. The battery device of claim 7, wherein A distance between the end of the rotation-preventing section away from the locking section and the side of the second structure away from the first structure is defined as H, and 0.1mm≤H≤0.3mm is satisfied.

9. The battery device according to any one of claims 1 to 4, wherein Surfaces of the bolt, the rotation-preventing nut and the locking nut are provided with an isolation coating. Alternatively, the bolt, the rotation-preventing nut and the locking nut are made of titanium alloy material.

10. The battery device according to any one of claims 1 to 4, wherein At least one of the first structure and the second structure is made of composite material or carbon fiber material.

11. The battery device of claim 10, wherein, The first structure is one of a battery shell and a circuit board, and the second structure is the other of the battery shell and the circuit board.

12. A bolt combination structure characterized by comprising: The bolt combination structure is configured to connect the first structure and the second structure, and comprises: a bolt comprising a head and a shank connected together, the shank being arranged through the first connecting hole and the second connecting hole, and the head being in limiting cooperation with the limiting slot to limit rotation of the head relative to the first structure; a rotation-preventing nut being sleeved on the shank and in limiting cooperation with the second structure to limit rotation of the rotation-preventing nut relative to the second structure; a locking nut being sleeved on the shank away from the head.

13. An electrical device, characterized by The battery device comprises the first structure and the second structure. The battery device comprises the first structure and the second structure.

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