Battery device and electric device

Abstract

The utility model relates to a battery device and a power utilization device. The battery device comprises a battery box body and a battery monomer. The battery box body comprises a cover plate and a pressing rivet piece, the cover plate is provided with a matching piece, and the matching piece comprises a body and a first anti-rotation part; a through hole is formed in the body in a penetrating mode. The first anti-rotation part is located on the periphery of the through hole and protrudes out of the surface of the body. The rivet pressing piece comprises a head part and a rod part which are connected with each other, and part of the rod part penetrates through the through hole in the axis direction of the rod part; wherein the pressing rivet piece can be switched between an interference state and a non-interference state, and when the pressing rivet piece is in the interference state, the first anti-rotation part is located in the autorotation range of the head part and abuts against the head part; when the pressing rivet piece is in a non-interference state, the first anti-rotation part is located within the autorotation range of the head part and is spaced from the head part. And the battery monomers are arranged in the battery box body. When the pressing rivet piece is loosened and tends to rotate, the first anti-rotation part can prevent the head from rotating, the rod part is prevented from rotating along with the head, and the probability of rotation when the pressing rivet piece is loosened is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] In the assembly process of new energy vehicles, some components within the battery unit are typically installed using press-fit parts. As the battery unit is used over time, these press-fit parts can loosen, affecting the installation stability of the components being installed and secured by them. Utility Model Content

[0003] In view of the above problems, this application provides a battery device and an electrical device that can alleviate the problem that the press-fit parts are prone to rotation and loosening after long-term use.

[0004] In a first aspect, this application provides a battery device, which includes a battery housing and a battery cell. The battery housing includes a cover plate and a rivet, the cover plate is provided with a mating part, the mating part includes a body and a first anti-rotation part; a through hole is provided through the body, the first anti-rotation part is located on the outer periphery of the through hole and protrudes from the surface of the body; the rivet includes a head and a rod connected to each other, a portion of the rod passing through the through hole along its own axial direction;

[0005] The rivet can switch between an interference state and a non-interference state. When the rivet is in the interference state, the first anti-rotation part is located within the rotation range of the head and abuts against the head. When the rivet is in the non-interference state, the first anti-rotation part is located within the rotation range of the head and is spaced apart from the head. The battery cell is located inside the battery box.

[0006] In the technical solution of this application embodiment, when the rivet is loose and has a tendency to rotate, the head deflects and comes into contact with the first anti-rotation part. At this time, the rivet switches from a non-interference state to an interference state. Because the first anti-rotation part is located within the rotation range of the head, it can block the head from rotating, thereby preventing the rod from rotating with the head and reducing the probability of rotation when the rivet is loose.

[0007] In some embodiments, the head includes a connecting section and a protruding section, one end of the connecting section being connected to the rod portion and the other end being connected to the protruding section;

[0008] In the interference state, the protruding section rotates to abut against the first anti-rotation part, wherein, in the direction perpendicular to the cover plate, the orthographic projection length of the protruding section on the cover plate is less than the orthographic projection length of the first anti-rotation part on the cover plate.

[0009] This design divides the head into two parts: a connecting section and a protruding section. The shapes of these two parts can be flexibly configured, enriching the possible shapes of the head. Furthermore, linking the protruding section with the first anti-rotation component allows for minimizing the material required to manufacture both the first anti-rotation component and the protruding section without affecting their performance, thereby reducing production costs.

[0010] In some embodiments, the orthographic projection length of the first anti-rotation part on the cover plate is L, where 3mm ≤ L ≤ 5mm.

[0011] In this way, the length range of the first anti-rotation part is limited, reducing the processing difficulty of the first anti-rotation part.

[0012] In some embodiments, the body is provided with a groove that is recessed in a direction away from the head, the bottom wall of the groove is provided with a first anti-rotation part, and the head is placed inside the groove.

[0013] Thus, by placing the first anti-rotation part within the groove and allowing the head to move within the groove, the groove can protect both the first anti-rotation part and the head, reducing the probability of interference and damage between the first anti-rotation part and the head and the outside. Furthermore, the groove can also limit the area where the head rotates, thereby initially limiting the head and reducing the probability of the head detaching from the mating part.

[0014] In some embodiments, the bottom wall of the groove is recessed to form a first anti-rotation portion.

[0015] This design reduces the difficulty of manufacturing the first anti-rotation part, simplifies the processing steps, and improves the connection strength between the first anti-rotation part and the parts connected to it.

[0016] In some embodiments, the rivet also includes an anti-detachment part, which is located on the side of the rod near the head. A portion of the body is held in the anti-detachment part, and the body is limited in a direction perpendicular to the body.

[0017] Thus, when the press-fit part is assembled onto the mating part, the anti-detachment part can engage with the mating part, thereby reducing the probability of the press-fit part separating from the mating part and improving the connection stability between the press-fit part and the mating part.

[0018] In some embodiments, the sidewall of the rod is recessed to form a limiting groove, which is configured as an anti-detachment part.

[0019] This design simplifies the structure of the anti-hair loss part and reduces the difficulty of its preparation.

[0020] In some embodiments, the mating member is provided with a slot, and the press-fit member further includes a second anti-rotation part, which protrudes from the side of the head facing the mating member and is accommodated in the slot.

[0021] When the head tends to rotate, the first and second anti-rotation parts can work together to prevent the head from rotating, thus improving the anti-rotation capability of the press-fit part.

[0022] In some embodiments, a raised rib is formed on the surface of the head facing the rod, the raised rib is configured as a second anti-rotation part, and all the raised ribs are radially distributed around the rod.

[0023] This configuration utilizes multiple second anti-rotation components working simultaneously to achieve anti-rotation from multiple directions.

[0024] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments.

[0025] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of a battery device according to one or more embodiments.

[0028] Figure 2 This is an exploded structural diagram of a battery cell according to one or more embodiments.

[0029] Figure 3 This is a schematic diagram of a rivet assembly on a cover plate according to one or more embodiments.

[0030] Figure 4 This is a structural schematic diagram of the mating component according to one or more embodiments.

[0031] Figure 5 This is a cross-sectional view showing the rivets and mating parts assembled together according to one or more embodiments.

[0032] Figure 6 This is a perspective view of a press-fit member according to one or more embodiments.

[0033] Figure 7 This is a top view showing the rivets and mating parts assembled together according to one or more embodiments.

[0034] Figure 8 This is a top view showing the rivets and mating parts assembled together according to one or more embodiments.

[0035] Figure 9 This is a perspective view of a press-fit member according to one or more embodiments.

[0036] Figure 10 This is a perspective view of the rivets and mating parts assembled together according to one or more embodiments.

[0037] Figure 11 This is a perspective view of the rivets and mating parts assembled together according to one or more embodiments.

[0038] Figure 12 This is a cross-sectional view showing the rivets and mating parts assembled together according to one or more embodiments.

[0039] The reference numerals in the detailed embodiments are as follows:

[0040] 100. Battery device;

[0041] 10. Battery housing; 11. First part; 12. Second part;

[0042] 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Cell assembly;

[0043] 30. Cover plate; 31. Mating part; 311. Body; 3111. Through hole; 312. First anti-rotation part; 32. Press-fit part; 321. Head; 3211. Connecting section; 3212. Protruding section; 322. Rod part; 323. Anti-detachment part; 324. Second anti-rotation part. Detailed Implementation

[0044] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0045] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments of this application, the term "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0049] In the description of the embodiments of this application, if any, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0050] In the description of the embodiments of this application, if any technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," or "circumferential" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of this application.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0052] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0053] During the manufacturing process of batteries, crimping components are typically used to secure certain internal parts. However, over time, these crimping components can rotate and loosen, affecting the stability of the assembled components.

[0054] To address the problem of loosening caused by rotation of the rivet, this application provides a battery device. This battery device incorporates a first anti-rotation portion on a mating component that mates with the rivet, positioned within the rotation range of the rivet's head. Thus, if the rivet tends to rotate, the first anti-rotation portion prevents the head from rotating, thereby preventing the entire rivet from rotating.

[0055] The battery devices disclosed in this application can be used in electrical devices that use the battery device as a power source, or in various energy storage systems that use the battery device as an energy storage element. Electrical devices can be, but are not limited to, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0056] For ease of explanation, the following embodiments will be described using a battery device 100 according to an embodiment of this application as an example.

[0057] Please refer to Figure 1 , Figure 1This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery housing 10 and a battery cell 20, with the battery cell 20 housed within the battery housing 10. The battery housing 10 provides a space for accommodating the battery cell 20, and can adopt various structures. In some embodiments, the battery housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the space; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the battery housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0058] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within the battery casing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is then housed within the battery casing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0059] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0060] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit that makes up a battery. Figure 3 The battery cell 20 includes an end cap 21, a housing 22, a cell assembly 23, and other functional components.

[0061] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Alternatively, end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 21 is less prone to deformation under pressure and impact, allowing battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with cell assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0062] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the cell assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the cell assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0063] The cell assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more cell assemblies 23. The cell assembly 23 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the cell assembly, while the portions of the positive and negative electrode plates without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0064] Please see Figure 1 , Figures 3 to 5 Some embodiments of this application provide a battery device 100, which includes a battery housing 10 and a battery cell 20. The battery housing 10 includes a cover plate 30 and a rivet 32. The cover plate 30 is provided with a mating part 31, which includes a body 311 and a first anti-rotation part 312. A through hole 3111 is provided through the body 311, and the first anti-rotation part 312 is located on the outer periphery of the through hole 3111 and protrudes from the surface of the body 311. The rivet 32 ​​includes a head 321 and a rod 322 connected to each other, and part of the rod 322 passes through the through hole 3111 along its own axis. The rivet 32 ​​can switch between an interference state and a non-interference state. When the rivet 32 ​​is in the interference state, the first anti-rotation part 312 is located within the rotation range of the head 321 and abuts against the head 321. When the rivet 32 ​​is in the non-interference state, the first anti-rotation part 312 is located within the rotation range of the head 321 and is spaced apart from the head 321. The battery cell 20 is disposed inside the battery housing 10.

[0065] The cover plate 30 can be understood as the first part 11 of the battery box 10 mentioned above. The cover plate 30 is used to support the mating part 31. The mating part 31 is used to install the pressing part 32. The mating part 31 can be made of metal and processed using sheet metal technology. The body 311 and the first anti-rotation part 312 can be processed simultaneously using an integral molding process, or they can be processed separately. The pressing part 32 can also be made of metal.

[0066] The following explanation focuses on the process of assembling the press-fit part 32 onto the mating part 31.

[0067] In the initial stage of assembly, the rivet 32 ​​is placed on the side where the first anti-rotation part 312 is located. The rod 322 is inserted into the through hole 3111 of the body 311. When the head 321 of the rivet 32 ​​approaches the first anti-rotation part 312, a riveting machine can be used to press the rivet 32 ​​in, so that the head 321 contacts the body 311. At this time, the rivet 32 ​​is in a non-interference state.

[0068] When the rivet 32 ​​becomes loose and tends to rotate, the head 321 deflects and comes into contact with the first anti-rotation part 312. At this time, the rivet 32 ​​switches from a non-interference state to an interference state. Because the first anti-rotation part 312 is located within the rotation range of the head 321, it can prevent the head 321 from rotating, thereby preventing the rod 322 from rotating with the head 321 and reducing the probability of the rivet 32 ​​rotating when it becomes loose.

[0069] like Figure 6 As shown, in some embodiments, the head 321 includes a connecting section 3211 and a protruding section 3212. One end of the connecting section 3211 is connected to the rod portion 322, and the other end is connected to the protruding section 3212. In an interference state, the protruding section 3212 rotates to abut against the first anti-rotation portion 312. Specifically, in the direction perpendicular to the cover plate 30, the orthographic projection length of the protruding section 3212 on the cover plate 30 is less than the orthographic projection length of the first anti-rotation portion 312 on the cover plate 30.

[0070] In other words, the head 321 can be divided into two parts: the connecting section 3211 and the protruding section 3212. In the direction perpendicular to the cover plate 30, the part where the orthographic projection of the head 321 overlaps with the rod 322 can be regarded as the connecting section 3211, and the rest of the head 321 excluding the connecting section 3211 is regarded as the protruding section 3212.

[0071] like Figure 6 and Figure 7 As shown, in some examples, in the direction perpendicular to the cover plate 30, the orthographic projection outline of the head 321 on the mating member 31 is fan-shaped, the orthographic projection outline of the connecting section 3211 is rectangular, the orthographic projection outline of the protruding section 3212 is fan-shaped, and the orthographic projection outline of the first anti-rotation part 312 is semi-circular. That is, the orthographic projection outline of the head 321 on the mating member 31 and the orthographic projection outline of the first anti-rotation part 312 on the mating member 31 together form a circle. Among them, the orthographic projection length of the protruding section 3212 is less than the orthographic projection length of the first anti-rotation part 312.

[0072] Because the first anti-rotation part 312 is located within the rotation range of the head 321, and the orthographic projection length of the protruding section 3212 is less than the orthographic projection length of the first anti-rotation part 312, when the head 321 rotates, the protruding section 3212 can abut against the first anti-rotation part 312, and the first anti-rotation part 312 can prevent the protruding section 3212 from continuing to rotate.

[0073] like Figure 8 and Figure 9As shown, in other examples, the orthographic projection of the head 321 onto the mating member 31 is rectangular, and the orthographic projections of the connecting section 3211 and the protruding section 3212 are both rectangular. The orthographic projection of the first anti-rotation part 312 onto the mating member 31 is semi-circular.

[0074] Assume the radius of the circle formed by the rotation of the head 321 is r1. The radius of the projected profile of the first anti-rotation part 312 on the mating part 31 is r2, where r2 is less than r1. The orthographic projection length of the protruding section 3212 is less than the orthographic projection length of the first anti-rotation part 312.

[0075] Of course, in other examples, the circle formed by the rotation of the head 321 has a radius of r1. When the projected outline of the first anti-rotation part 312 is a semicircle, its radius is r2, which can be greater than r1.

[0076] Because the first anti-rotation part 312 is located within the rotation range of the head 321, and the orthographic projection length of the protruding section 3212 is less than the orthographic projection length of the first anti-rotation part 312, when the head 321 rotates, the protruding section 3212 can abut against the first anti-rotation part 312, and the first anti-rotation part 312 can prevent the protruding section 3212 from continuing to rotate.

[0077] This configuration divides the head 321 into two parts: a connecting section 3211 and a protruding section 3212. The shapes of these two parts can be flexibly configured, enriching the possible shapes of the head 321. Furthermore, linking the protruding section 3212 with the first anti-rotation part 312 allows for minimizing the material required to manufacture both the first anti-rotation part 312 and the protruding section 3212 without affecting their performance, thereby reducing production costs.

[0078] In some embodiments, the orthographic projection length of the first anti-rotation part 312 on the cover plate 30 is L, where 3mm ≤ L ≤ 5mm. The value of L can be, but is not limited to, 3mm, 3.2mm, 4mm, 4.5mm, 5mm, or any value between two adjacent values.

[0079] In this way, the length range of the first anti-rotation part 312 is limited, reducing the processing difficulty of the first anti-rotation part 312.

[0080] In some embodiments, the surface of the first anti-rotation part 312 that abuts against the head 321 is provided with a plurality of spaced protrusions (not shown in the figure), and at least some of the protrusions abut against the head 321.

[0081] As the service life of the rivet 32 ​​increases, the wear caused by the contact between the first anti-rotation part 312 and the head 321 also increases. Therefore, multiple spaced platforms are provided on the contact surface between the first anti-rotation part 312 and the head 321. Even after some platforms fail, the remaining platforms can continue to contact the head 321 and provide a blocking effect. In this way, when the head 321 rotates slightly, the unfailed platforms continue to act as a blocking force, preventing the head 321 from rotating further, thereby extending the service life and effectiveness of the first anti-rotation part 312.

[0082] Specifically, in some embodiments, the first anti-rotation portion 312 has a plurality of ribs protruding from at least one surface in a direction perpendicular to the cover plate 30, and each rib protrudes from the edge of the first anti-rotation portion 312 near the end of the head 321 and is configured to form a boss.

[0083] For example, on the side where the head 321 is located, the surface of the first anti-rotation part 312 is provided with ribs. This configuration reduces the difficulty of machining the boss and makes it easier to obtain the boss.

[0084] like Figure 10 and Figure 11 As shown, in some embodiments, the body 311 is provided with a groove, the groove is recessed in a direction away from the head 321, the bottom wall of the groove is provided with a first anti-rotation part 312, and the head 321 is placed in the groove.

[0085] When the rivet 32 ​​and the mating part 31 are assembled together, the head 321 of the rivet 32 ​​is located in the groove of the body 311. That is, when the rivet 32 ​​rotates, the head 321 deflects within the groove and abuts against the first anti-rotation part 312.

[0086] By placing the first anti-rotation part 312 within the groove and allowing the head 321 to move within the groove, the groove can protect both the first anti-rotation part 312 and the head 321, reducing the probability of interference and damage between them and external sources. Furthermore, the groove can also limit the area where the head 321 rotates, thus initially restricting the head 321 and reducing the probability of it detaching from the mating part 31.

[0087] Specifically, such as Figure 11 As shown, in some embodiments, the bottom wall of the groove is recessed to form a first anti-rotation portion 312. The mating part 31 and the first anti-rotation portion 312 can be manufactured by integral molding.

[0088] This design reduces the difficulty of manufacturing the first anti-rotation part 312, simplifies the processing steps, and improves the connection strength between the first anti-rotation part 312 and the parts connected to it.

[0089] Furthermore, such as Figure 12 As shown, in some embodiments, the rivet 32 ​​further includes an anti-detachment part 323, which is located on the side of the rod 322 near the head 321. A portion of the body 311 is inserted into the anti-detachment part 323, and the body 311 is limited in a direction perpendicular to the body 311.

[0090] For example, the anti-detachment part 323 is configured as a snap-fit. When the rivet 32 ​​is assembled onto the mating part 31, the anti-detachment part 323 can engage with the mating part 31, thereby reducing the probability of the rivet 32 ​​separating from the mating part 31 and improving the connection stability between the rivet 32 ​​and the mating part 31.

[0091] Furthermore, in some embodiments, the sidewall of the rod portion 322 is recessed to form a limiting groove, which is configured as an anti-detachment portion 323.

[0092] For example, the limiting groove on the side wall of the rod 322 is annular, and part of the body 311 can extend into the limiting groove and abut against it. This design simplifies the structure of the anti-detachment part 323 and reduces the difficulty of manufacturing the anti-detachment part 323.

[0093] Please see Figure 9 In some embodiments, the mating member 31 is provided with a slot, and the riveting member 32 further includes a second anti-rotation part 324, which protrudes from the head 321 on the side facing the mating member 31 and is accommodated in the slot.

[0094] During the process of assembling the riveting part 32 onto the mating part 31, when the rod part 322 of the riveting part 32 passes through the through hole 3111 and the head 321 of the riveting part 32 approaches the first anti-rotation part 312, the riveting machine presses the head 321, and the second anti-rotation part 324 enters the slot and engages with the slot.

[0095] When the head 321 tends to rotate, the first anti-rotation part 312 and the second anti-rotation part 324 can work together to prevent the head 321 from rotating, thus improving the anti-rotation capability of the press-fit part 32.

[0096] It should be noted that in some embodiments, the head 321 has a protruding ridge on the surface facing the rod 322, and the ridge is configured as a second anti-rotation part 324, with all the ridges radially distributed around the rod 322.

[0097] With this configuration, multiple second anti-rotation units 324 act simultaneously with the mating parts 31 to achieve anti-rotation from multiple directions.

[0098] Some embodiments of this application also provide an electrical device, which includes the battery device 100 in the above embodiments. Details regarding the battery device 100 can be found in the above description and will not be repeated here.

[0099] During the assembly of the rivet 32 ​​and the mating part 31, the rivet 32 ​​is placed on the side where the first anti-rotation part 312 is located. The rod 322 is inserted into the through hole 3111 of the body 311. When the head 321 of the rivet 32 ​​approaches the first anti-rotation part 312, a riveting machine can be used to press the rivet 32 ​​in, so that the head 321 contacts the body 311 and the first anti-rotation part 312.

[0100] When the rivet 32 ​​becomes loose and there is a drive for rotation, the first anti-rotation part 312 is located within the rotation range of the head 321, so the first anti-rotation part 312 can block the head 321 from rotating, thereby preventing the rod part 322 from rotating with the head 321 and reducing the probability of rotation when the rivet 32 ​​becomes loose.

[0101] In one specific embodiment, a battery device 100 is provided, which includes a battery housing 10 and battery cells 20. The battery housing 10 includes a cover plate 30 and a rivet 32. The cover plate 30 is provided with a mating member 31, which includes a body 311 and a first anti-rotation part 312. A through hole 3111 is provided through the body 311, and the first anti-rotation part 312 is located on the outer periphery of the through hole 3111 and protrudes from the surface of the body 311. The rivet 32 ​​includes a head 321, a rod 322 and a second anti-rotation part 324, wherein the head 321 and the rod 322 are connected to each other.

[0102] In the initial stage of assembly, the press-fit part 32 is placed on the side where the first anti-rotation part 312 is located. The rod part 322 is inserted into the through hole 3111 of the body 311. When the head 321 of the press-fit part 32 approaches the first anti-rotation part 312, a press-fit machine can be used to press the press-fit part 32 into place, so that the head 321 contacts the body 311 and the first anti-rotation part 312. At this time, the second anti-rotation part 324 also enters the groove of the mating part 31.

[0103] When the rivet 32 ​​becomes loose and there is a drive for rotation, because the first anti-rotation part 312 is located within the rotation range of the head 321 and the second anti-rotation part 324 is located in the slot, the first anti-rotation part 312 and the second anti-rotation part 324 can jointly block the head 321 from rotating, thereby preventing the rod part 322 from rotating with the head 321 and reducing the probability of rotation when the rivet 32 ​​becomes loose.

[0104] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, include: The battery housing (10) includes a cover plate (30) and a rivet (32). The cover plate (30) is provided with a mating part (31). The mating part (31) includes a body (311) and a first anti-rotation part (312). A through hole (3111) is provided on the body (311). The first anti-rotation part (312) is located on the outer periphery of the through hole (3111) and protrudes from the surface of the body (311). The press-fit part (32) includes a head (321) and a rod (322) connected to each other, and part of the rod (322) passes through the through hole (3111) along its own axis. The riveting member (32) can switch between an interference state and a non-interference state. When the riveting member (32) is in the interference state, the first anti-rotation part (312) is located within the rotation range of the head (321) and abuts against the head (321). When the riveting member (32) is in the non-interference state, the first anti-rotation part (312) is located within the rotation range of the head (321) and is spaced apart from the head (321). The battery cell is located inside the battery box.

2. The battery device according to claim 1, characterized in that, The head (321) includes a connecting section (3211) and a protruding section (3212), one end of the connecting section (3211) is connected to the rod (322), and the other end is connected to the protruding section (3212); In the interference state, the protruding section (3212) rotates to abut against the first anti-rotation part (312), wherein, in the direction perpendicular to the cover plate (30), the orthographic projection length of the protruding section (3212) on the cover plate (30) is less than the orthographic projection length of the first anti-rotation part (312) on the cover plate (30).

3. The battery device according to claim 2, characterized in that, The first anti-rotation part (312) has a projected length of L on the cover plate (30), where 3mm ≤ L ≤ 5mm.

4. The battery device according to claim 1, characterized in that, The body (311) is provided with a groove, the groove is recessed in a direction away from the head (321), the bottom wall of the groove is provided with the first anti-rotation part (312), and the head (321) is placed in the groove.

5. The battery device according to claim 4, characterized in that, The bottom wall of the groove is recessed to form the first anti-rotation part (312).

6. The battery device according to claim 1, characterized in that, The rivet (32) also includes an anti-detachment part (323), which is located on the side of the rod (322) near the head (321). A portion of the body (311) is held in the anti-detachment part (323), and the body (311) is limited in a direction perpendicular to the body (311).

7. The battery device according to claim 6, characterized in that, The side wall of the rod (322) is recessed to form a limiting groove, which is configured as the anti-detachment part (323).

8. The battery device according to claim 1, characterized in that, The mating part (31) is provided with a slot, and the riveting part (32) further includes a second anti-rotation part (324), which protrudes from the head (321) on the side facing the mating part (31) and is accommodated in the slot.

9. The battery device according to claim 8, characterized in that, The head (321) has a raised ridge protruding from the surface of the rod (322), the raised ridge being configured as the second anti-rotation part (324), and all the raised ridges are radially distributed around the rod (322).

10. An electrical device, characterized in that, It includes a housing and a battery device (100) as described in any one of claims 1 to 9.

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