Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and a power utilization device, and the battery device comprises a box body assembly, a battery monomer assembly and a sleeve, the box body assembly comprises a frame, the frame comprises a first wall part and a second wall part, the first wall part is provided with a first hole, and the second wall part is provided with a second hole; the sleeve comprises a sleeve body, a first convex part and a second convex part, the sleeve body penetrates through the first hole, the first convex part is arranged on the side, away from the frame, of the first wall part, the second convex part is arranged on the side, located in the frame, of the second wall part, the sleeve body is provided with a through hole, the hole diameter of the through hole is smaller than that of the second hole, and the second convex part is provided with an inner edge line and an outer edge line; the inner edge line is arranged on the side, close to the outer edge line, of the through hole, and the outer edge line is arranged on the side, away from the inner edge line, of the second hole. According to the utility model, sleeve positioning dimension deviation caused by deformation after the frame is welded can be absorbed, and the dimension precision of sleeve positioning is improved, so that the reliability of the battery device is improved.

Description

Technical Field

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

[0002] New energy vehicles have experienced rapid development in recent years. Within the electric vehicle sector, battery packs play an irreplaceable and important role as the power source. Typically, a battery pack consists of a housing and multiple battery cells housed within it. Currently, a frame is welded to the housing, and a sleeve is welded to the frame. The housing is secured to the vehicle's underbody or other electrical devices via the sleeve and bolts. However, the numerous pre-welding steps required before welding the sleeve and frame together create the risk of significant misalignment between the sleeve and frame, impacting the battery pack's installation reliability. Utility Model Content

[0003] The embodiments of the present application provide a battery device and an electrical device, which can improve the dimensional accuracy of sleeve positioning welding, thereby improving the reliability of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, comprising: a housing assembly, a battery cell assembly, and a sleeve. The housing assembly comprises a frame, the frame comprising a first wall portion and a second wall portion spaced apart, the first wall portion being provided with a first hole, and the second wall portion being provided with a second hole; the battery cell assembly being disposed within the housing assembly; the sleeve comprising a barrel, a first protrusion, and a second protrusion, the first protrusion and the second protrusion being spaced apart along the axial direction of the barrel, the barrel being passed through the first hole, the first protrusion being provided on a side of the first wall portion located outside the frame, and the second protrusion being provided on a side of the second wall portion located inside the frame, the barrel, the first protrusion, and the second protrusion being an integrally formed part; wherein the barrel is provided with a through hole, the through hole extending through the barrel along a central axis of the barrel, the aperture of the through hole being smaller than the aperture of the second hole, the second protrusion having an inner edge line and an outer edge line, the inner edge line being closer to the through hole than the outer edge line, the inner edge line being provided on a side of the through hole closer to the outer edge line, and the outer edge line being provided on a side of the second hole farther from the inner edge line.

[0005] In the above technical solution, the structural design of the above-mentioned sleeve and frame is adopted, and a space for absorbing tolerance can be formed between the through hole and the second hole to absorb the sleeve positioning size deviation caused by the deformation of the frame after welding, so that the through hole can be better connected with the second hole, which is conducive to reducing interference, improving the positioning accuracy between the sleeve and the frame, and improving the connection reliability between the battery device and the electrical device.

[0006] In some embodiments of the present application, the inner edge line is provided between the hole wall surface of the through hole and the hole wall surface of the second hole.

[0007] In the above technical solution, when the second protrusion needs to be welded to the second wall, this structure can be used to form a weld between the wall surface of the second hole and the end face of the second protrusion, and the butt weld between the sleeve and the second wall is converted into a right-angle weld. This can increase the distance between the welding heat source and the hole wall surface of the through hole, reduce the risk of deformation of the hole wall surface of the through hole, improve the reliability of the internal contour of the through hole, and thereby improve the positioning accuracy between the sleeve and the frame, thereby improving the installation reliability of the battery device.

[0008] In some embodiments of the present application, a plane perpendicular to the thickness of the second wall is drawn, and the projection of the inner edge onto the plane coincides with the projection of the wall surface of the second hole onto the plane. In this technical solution, the second protrusion can have a larger pressing surface between the second protrusion and the second wall, which can improve the support stability between the second protrusion and the second wall, thereby improving the installation reliability of the sleeve on the frame, and thus improving the installation reliability of the battery device.

[0009] In some embodiments of the present application, the distance between the inner edge line and the through-hole wall in the radial direction of the through-hole is L1, where 2mm≤L1≤3mm. In the above technical solution, by setting the distance L1 between the inner edge line and the through-hole wall within the above range, redundant deviations can be better absorbed, the dimensional accuracy of the sleeve tack welding can be improved, and the reliability of the battery device can be further improved.

[0010] In some embodiments of the present application, the distance between the inner edge and the outer edge in the radial direction of the through hole is L2, where 4 mm ≤ L2 ≤ 5 mm. In the above technical solution, by setting the distance L2 between the inner edge and the outer edge within the above range, a crimping surface of appropriate size can be formed between the second protrusion and the second wall, reducing the risk of the sleeve separating from the second wall when absorbing redundant deviation, improving the reliability of the connection between the sleeve and the second wall, and thereby improving the reliability of the battery device.

[0011] In some embodiments of the present application, the first and second protrusions are arranged around the circumference of the cylinder. In the above technical solution, the first and second protrusions are arranged around the circumference of the cylinder, and the first and second protrusions can be annular structures. Compared with the local protrusion design, the pressure contact surface between the first and second protrusions and the frame can be further increased, which is conducive to evenly distributing the load to the frame, reducing the risk of stress concentration damaging the frame due to single-point force, and improving the reliability of the battery device.

[0012] In some embodiments of the present application, the inner diameter of the first hole is larger than the inner diameter of the second hole, and is larger than or equal to the outer diameter of the second protrusion, and the outer diameter of the first protrusion is larger than the inner diameter of the first hole. In the above technical solution, the inner diameter of the first hole is larger than the inner diameter of the second hole, and is larger than or equal to the outer diameter of the second protrusion, and the outer diameter of the first protrusion is larger than the inner diameter of the first hole, thereby forming a large clearance fit between the sleeve and the first wall portion, ensuring that the second protrusion can pass through the first hole when the sleeve is inserted, while the first protrusion cannot pass through the first hole, so that the sleeve can be fixed in the frame.

[0013] In some embodiments of the present application, the first protrusion is provided at one axial end of the barrel. In the above technical solution, the first protrusion is provided at one axial end of the barrel, which can reduce the overall axial size of the sleeve, save space, reduce interference with other components when the battery device is installed with other equipment or electrical devices, reduce installation difficulty, and improve the energy density of the battery device.

[0014] In some embodiments of the present application, the second protrusion is provided at the other axial end of the barrel. In the above technical solution, based on the first protrusion being provided at one axial end of the barrel, the second protrusion is provided at the other axial end of the barrel. This further reduces the overall axial size of the sleeve, and the sleeve can be a single-pass frame. This reduces installation difficulty, saves installation space, and reduces the impact on the installation of other components of the battery device, further reducing installation difficulty and increasing the energy density of the battery device.

[0015] In some embodiments of the present application, the sleeve is provided with a transition surface connecting the hole wall surface of the through hole and the inner edge line, and the diameter of the transition surface gradually increases in the direction from the first protrusion to the second protrusion. In the above technical solution, the diameter of the transition surface gradually increases in the direction from the first protrusion to the second protrusion. This can make the transition between the inner edge line and the hole wall surface of the through hole relatively smooth, reduce the risk of stress concentration, improve the reliability of the sleeve, and also form a flared structure at the end of the sleeve where the second protrusion is provided, facilitating the installation of components such as locating pins or bolts.

[0016] In some embodiments of the present application, the transition surface is an inclined surface. In the above technical solution, the transition surface is an inclined surface, which can be formed in one step by turning, milling or stamping, thereby improving processing efficiency and reducing processing costs. The above solution has a simple structure and is easy to process and manufacture.

[0017] In some embodiments of the present application, the barrel includes a first barrel portion and a second barrel portion, the outer diameter of the second barrel portion is smaller than the outer diameter of the first barrel portion, and is inserted into the second hole, and the first protrusion and the second protrusion are arranged at both ends of the axial direction of the first barrel portion, wherein the second protrusion is arranged close to the second barrel portion. In the above technical solution, the sleeve adopts the above structure to achieve double insertion between the sleeve and the frame, that is, the first barrel portion is inserted into the first wall portion, and the second barrel portion is inserted into the second wall portion. The sleeve adopting this double insertion structure can improve the connection reliability with the frame, and also facilitate the positioning of the sleeve on the frame, which is conducive to improving the positioning accuracy of the sleeve. The outer diameter of the second barrel portion is smaller than the first barrel portion, and the sleeve as a whole forms a "stepped shaft" structure. This can improve the structural strength of the main part of the sleeve, and then, while satisfying the requirement that the sleeve passes through the second wall portion, the overall structural strength of the sleeve is made higher, which can improve the installation reliability between the sleeve and the frame.

[0018] In some embodiments of the present application, the barrel includes a first barrel portion, a second barrel portion, and a third barrel portion, the second barrel portion and the third barrel portion are arranged at both ends of the first barrel portion in the axial direction, the second barrel portion is passed through the second hole, the third barrel portion is passed through the first hole, the first protrusion is arranged at one end of the first barrel portion close to the third barrel portion, and the second protrusion is arranged at the other end of the first barrel portion close to the second barrel portion. In the above technical solution, the second barrel portion and the third barrel portion are arranged at both ends of the first barrel portion in the axial direction, and the sleeve can also achieve double penetration with the frame by adopting the above structure. The sleeve adopting this double penetration structure can improve the connection reliability with the frame, and also facilitate the positioning of the sleeve on the frame, which is conducive to improving the positioning accuracy of the sleeve. When the battery device is installed in a vehicle or other electrical device, if there is a gap between the two ends of the frame in the third direction and the vehicle or electrical device, the second barrel portion and the third barrel portion can provide a support position to improve the reliability of the battery device.

[0019] In some embodiments of the present application, the first wall portion is located on the upper side of the second wall portion; or, the first wall portion is located on the lower side of the second wall portion.

[0020] In the above technical solution, when the first wall portion is located on the upper side of the second wall portion, the installation of the sleeve on the frame can be called "upright installation", which is suitable for top loading scenarios. For example, when the battery device is installed from top to bottom, the first wall portion can bear the weight of the module and transfer it to the bottom support structure through the sleeve, thereby preventing the second wall portion from bearing cantilever loads. When the first wall portion is located on the lower side of the second wall portion, the installation of the sleeve on the frame can be called "inverted installation", which is suitable for bottom support scenarios. For example, when the battery device is fixed to the vehicle chassis, the second wall portion on the upper side can prevent rainwater and mud from accumulating, and the first wall portion on the lower side is connected to the chassis bolts to improve pull-out resistance. It can be understood that the first wall portion being located on the upper side of the second wall portion, or the first wall portion being located on the lower side of the second wall portion, can expand the installation and use scenarios of the battery device.

[0021] In some embodiments of the present application, the box assembly includes a box body with a frame disposed circumferentially around the box body. In the above technical solution, the frame forms a rigid ring beam, which evenly distributes the circumferential load of the box body, avoids deformation caused by localized forces, and improves the structural strength of the box body. It also stably secures the battery device to the power-consuming device, improving the reliability of the connection between the battery device and the power-consuming device.

[0022] In some embodiments of the present application, the frame includes a frame body and side beams. The frame body is arranged around the circumference of the box body, the side beams are arranged on at least two sides of the frame body, and the first wall portion and the second wall portion are arranged on the side beams. In the above technical solution, the frame body is arranged around the circumference of the box body to form a basic load-bearing ring, and the side beams can be distributed on both sides as reinforcement ribs to construct a composite support system, thereby improving the structural strength of the frame and the reliability of the battery device.

[0023] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery device as described in any one of the above.

[0024] In the above technical solution, since the battery device has high reliability, it is beneficial to improve the reliability of the electrical device using the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the structure of a vehicle is provided as the electrical device provided in some embodiments of the present application;

[0027] Figure 2 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0028] Figure 3 A schematic structural diagram of a battery device provided in some embodiments of the present application;

[0029] Figure 4 Partial cross-section of the frame and sleeve provided in some embodiments of the present application Figure 1 ;

[0030] Figure 5 for Figure 4 A local enlarged schematic diagram of location I;

[0031] Figure 6 for Figure 4A schematic diagram of the three-dimensional structure of a sleeve provided in an embodiment;

[0032] Figure 7 Partial cross-section of the frame and sleeve provided in some embodiments of the present application Figure 2 ;

[0033] Figure 8 for Figure 7 A local enlarged schematic diagram of location II;

[0034] Figure 9 for Figure 7 A schematic diagram of the three-dimensional structure of a sleeve provided in an embodiment;

[0035] Figure 10 Partial cross-section of the frame and sleeve provided in some embodiments of the present application Figure 3 ;

[0036] Figure 11 for Figure 10 A schematic diagram of the three-dimensional structure of a sleeve provided in an embodiment;

[0037] Figure 12 Partial cross-section of the frame and sleeve provided in some embodiments of the present application Figure 4 ;

[0038] Figure 13 Partial cross-section of the frame and sleeve provided in some embodiments of the present application Figure 5 .

[0039] icon:

[0040] 100. Battery device;

[0041] 10. Box assembly; 11. Box; 111. First box body; 112. Second box body; 12. Frame; 121. First wall; 121a. First hole; 122. Second wall; 122a. Second hole; 122b. Wall; 123. Frame body; 124. Side beam;

[0042] 20. Battery cell assembly; 21. Battery cell;

[0043] 30. Sleeve; 31. Cylinder; 31a. Through hole; 31b. Transition surface; 311. First cylindrical portion; 312. Second cylindrical portion; 313. Third cylindrical portion; 32. First convex portion; 33. Second convex portion; 331. Inner edge line; 332. Outer edge line; 333. End surface;

[0044] 1000, vehicle; 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0047] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0049] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0050] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0051] The term "plurality" used in this application refers to two or more (including two).

[0052] In this application, battery cells may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0053] The battery apparatus referred to in the embodiments of this application may refer to a battery assembly comprising one or more battery cells, which are used to provide voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or in parallel via a busbar. In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0054] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, the battery module may be formed by bundling multiple battery cells with a cable tie.

[0055] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies housed within the housing. For example, the battery cell assemblies may be battery modules, which may be housed within the housing by securing the battery modules within the housing. For example, the battery cell assembly may also be housed within the housing by directly securing multiple battery cells to the housing. The housing prevents liquids or other foreign matter from interfering with the charging or discharging of the battery cells.

[0056] A battery cell includes a casing, an electrode assembly, and an electrolyte. The casing is used to hold the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet consists of a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector uncoated with the negative active material layer protrudes from the negative current collector coated with the negative active material layer. The negative current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together.

[0057] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0058] New energy vehicles have experienced rapid development in recent years. Within the electric vehicle sector, battery packs play an irreplaceable and important role as the power source. Typically, a battery pack consists of a housing and multiple battery cells housed within it. Currently, a frame is welded to the housing, and a sleeve is welded to the frame. The housing is secured to the vehicle's underbody or other electrical devices via the sleeve and bolts. However, the numerous pre-welding steps required before welding the sleeve and frame together create the risk of significant misalignment between the sleeve and frame, impacting the battery pack's installation reliability.

[0059] In general battery devices, a T-flange mounting sleeve is used. A snap is provided on the outer side of the sleeve, which is snapped into engagement with the side wall of the mounting hole of the battery frame to prevent the sleeve from falling off. The plastic part and the slide structure facilitate installation and assembly. Although the functions of preventing falling off, easy assembly, and high efficiency are achieved, the sleeve and the mounting hole are snap-fitted together. When the box mounting beam is deformed during the welding process, the mounting sleeve mounting hole is also deformed, causing the position accuracy of the sleeve to change with the mounting sleeve after snap-fitting. In particular, the deformation is more serious during the welding process of the thin-walled steel beam box. The direct snap-fitting sleeve is affected by the deformation of the mounting hole, which cannot effectively solve the redundant positioning problem of the mounting sleeve and cannot achieve high-precision positioning, thereby affecting the reliability of the battery device.

[0060] Based on the above considerations, in order to solve the problem that during the welding process of the box assembly of the battery device, the hole of the box assembly for installing the sleeve undergoes significant deformation, affecting the positioning accuracy of the sleeve and thus affecting the reliability of the battery device, the applicant designed a battery device comprising: a box assembly, a battery cell assembly and a sleeve. The box assembly includes a frame, the frame includes a first wall portion and a second wall portion arranged at intervals, the first wall portion is provided with a first hole, and the second wall portion is provided with a second hole; the battery monomer assembly is arranged in the box assembly; the sleeve includes a barrel, a first protrusion and a second protrusion, the first protrusion and the second protrusion are arranged at intervals along the axial direction of the barrel, the barrel is passed through the first hole, the first protrusion is arranged on the side of the first wall portion outside the frame, and the second protrusion is arranged on the side of the second wall portion inside the frame, the barrel, the first protrusion and the second protrusion are an integrally formed part; wherein, the barrel is provided with a through hole, the through hole passes through the barrel along the central axis of the barrel, the aperture of the through hole is smaller than the aperture of the second hole, the second protrusion has an inner edge line and an outer edge line, the inner edge line is closer to the through hole than the outer line, the inner edge line is arranged on the side of the through hole close to the outer edge line, and the outer line is arranged on the side of the second hole away from the inner edge line.

[0061] In a battery device of this structure, the above-mentioned sleeve and frame structural design is adopted, and a space for absorbing tolerance can be formed between the through hole and the second hole to absorb the sleeve positioning size deviation caused by the deformation of the frame after welding, so that the through hole can be better connected with the second hole, which is conducive to reducing interference, improving the positioning accuracy between the sleeve and the frame, and improving the connection reliability between the battery device and the electrical device.

[0062] The battery device disclosed in the embodiments of the present application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery device disclosed in the present application can be used to form the electrical device, thereby increasing the scope of application of the battery device.

[0063] The present invention provides an electrical device that uses a battery device as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0064] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in one embodiment of the present application. Figure 1 , Figure 1 The power-consuming device provided for some embodiments of the present application is a structural diagram of a vehicle 1000. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0065] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0066] Please refer to Figure 2 , Figure 2This is an exploded view of the structure of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a housing 11 and a plurality of battery cells 21, which are intended to be accommodated within the housing 11. The housing 11 is used to provide assembly space for the battery cells 21, and the housing 11 can adopt a variety of structures. In some embodiments, the housing 11 can include a first housing body 111 and a second housing body 112, which cover each other and together define an assembly space for accommodating the battery cells 21. The second housing body 112 can be a hollow structure with one end open. The first housing body 111 can be a plate-like structure, and the first housing body 111 covers the open side of the second housing body 112, so that the first housing body 111 and the second housing body 112 jointly define an assembly space. The first housing body 111 and the second housing body 112 can also be hollow structures with one end open, with the open side of the first housing body 111 covering the open side of the second housing body 112. Of course, the box body 11 formed by the first box body 111 and the second box body 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0067] In the battery device 100, the multiple battery cells 21 can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections among the multiple battery cells 21. The multiple battery cells 21 can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure formed by the multiple battery cells 21 is housed within the housing 11. Alternatively, the battery device 100 can be constructed by first connecting the multiple battery cells 21 in series, in parallel, or in a hybrid configuration to form a battery module. The multiple battery modules are then connected in series, in parallel, or in a hybrid configuration to form a single structure, which is then housed within the housing 11. The battery device 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 21.

[0068] Please refer to Figure 2 , Figure 2 Exploded diagram of the structure of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes multiple rows of battery cells 21, which are arranged along the length of the housing 11, with each row of battery cells 21 including multiple battery cells 21 arranged along the width of the housing 11; alternatively, the multiple rows of battery cells 21 are arranged along the width of the housing 11, with each row of battery cells 21 including multiple battery cells 21 arranged along the length of the housing 11.

[0069] Each battery cell 21 can be a secondary battery or a primary battery, wherein a secondary battery refers to a battery cell 21 that can be activated by charging the active material after the battery cell is discharged and can continue to be used; it can also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited in the embodiments of the present application. The battery cell 21 can be cylindrical, flat, rectangular or other shapes. For example, in Figure 2 In FIG, the battery cell 21 is in the shape of a rectangular parallelepiped.

[0070] Reference Figures 3 to 6 The embodiment of the present application provides a battery device 100, comprising: a box assembly 10, a battery cell assembly 20 and a sleeve 30. The box assembly 10 comprises a frame 12, the frame 12 comprises a first wall portion 121 and a second wall portion 122 arranged at intervals, the first wall portion 121 is provided with a first hole 121a, and the second wall portion 122 is provided with a second hole 122a; the battery cell assembly 20 is arranged in the box assembly 10; the sleeve 30 comprises a barrel 31, a first protrusion 32 and a second protrusion 33, the first protrusion 32 and the second protrusion 33 are arranged at intervals along the axial direction of the barrel 31, the barrel 31 is passed through the first hole 121a, the first protrusion 32 is arranged on a side of the first wall portion 121 outside the frame 12, and the second protrusion 33 is arranged on the second wall portion 12 2 is located on one side within the frame 12, and the barrel 31, the first protrusion 32, and the second protrusion 33 are an integrally formed part; wherein the barrel 31 is provided with a through hole 31a, which passes through the barrel 31 along the central axis of the barrel 31. The aperture of the through hole 31a is smaller than the aperture of the second hole 122a. The second protrusion 33 has an inner edge line 331 and an outer edge line 332. The inner edge line 331 is closer to the through hole 31a than the outer edge line 332. The inner edge line 331 is located on the side of the through hole 31a closer to the outer edge line 332, and the outer edge line 332 is located on the side of the second hole 122a farther from the inner edge line 331.

[0071] The housing assembly 10 may be a structure for housing and protecting the battery cell assembly 20. The housing assembly 10 may be shaped, but not limited to, a rectangular parallelepiped, a cube, a cylinder, etc., and may be made of, but not limited to, metal (e.g., aluminum, stainless steel, etc.), plastic (e.g., polypropylene, polyamide, polyphenylene sulfide, etc.), composite material (e.g., carbon fiber reinforced composite material, aluminum-plastic film, etc.), or other materials resistant to electrolyte corrosion.

[0072] The frame 12 may refer to a structure for mounting the sleeve 30 in the box assembly 10, and may include a first wall portion 121 and a second wall portion 122. The first wall portion 121 and the second wall portion 122 may refer to a wall plate structure. The first wall portion 121 and the second wall portion 122 are spaced apart along the height direction of the box assembly 10. As an example, the "height direction of the box assembly 10" mentioned herein may refer to Figure 3 The first wall portion 121 may be provided with a first hole 121a, and the second wall portion 122 may be provided with a second hole 122a. The first holes 121a and the second holes 122a may be provided in equal numbers, forming a plurality of pairs, with the first hole 121a and the second hole 122a of each pair correspondingly provided. The diameters of the first holes 121a and the second holes 122a may be equal or unequal. For example, the number of the first holes 121a and the second holes 122a may be, but is not limited to, two, three, four, five, or the like.

[0073] Optionally, the box assembly 10 may further include a box body 11, which may be a structure having a storage space for accommodating the battery cell assembly 20, and a frame 12 provided on the box body 11. The frame 12 may be provided on one side or multiple sides of the box body 11, and the box body 11 and the frame 12 may be connected by welding, which may be, but is not limited to, arc welding, laser welding, resistance welding, ultrasonic welding, and the like. For example, referring to Figure 3 , the frame 12 can be set on the four sides of the box body 11.

[0074] The battery cell assembly 20 may refer to a component consisting of a plurality of battery cells 21. Optionally, the battery cell assembly 20 may include a plurality of battery cells 21, and the plurality of battery cells 21 may be arranged side by side along a first direction X of the box assembly 10, or the plurality of battery cells 21 may be arranged side by side along a second direction Y of the box assembly 10 (see FIG. Figure 3 ). The first direction X, the second direction Y, and the third direction Z mentioned below may refer to directions perpendicular to each other, and may be the width direction, length direction, or height direction of the box assembly 10, etc.

[0075] The sleeve 30 may refer to a structure for being set on the frame 12, and the material may be, but is not limited to, metal materials, engineering plastics, composite materials, etc. The sleeve 30 may include a cylinder 31 and a first protrusion 32 and a second protrusion 33 spaced apart on the cylinder 31 along the axial direction of the cylinder 31. The sleeve 30 may refer to a cylindrical structure with a through hole 31a provided inside, through which a bolt may pass to connect the battery device 100 to the electrical device. The first protrusion 32 and the second protrusion 33 may refer to protruding structures on the sleeve 30, and may be, but is not limited to, annular bosses, bosses spaced apart, etc. For example, referring to Figure 5, the first protrusion 32 and the second protrusion 33 can be annular bosses.

[0076] The inner edge line 331 may refer to the boundary line formed by the connection between the second protrusion 33 and the cylinder 31, and the outer edge line 332 may refer to the outer edge line of the second protrusion 33 away from the cylinder 31. Figure 6 、 Figure 9 and Figure 11 .

[0077] Reference Figure 4 、 Figure 9 and Figure 11 , the cylinder 31, the first protrusion 32 and the second protrusion 33 are an integrally formed part. The molding method of the cylinder 31, the first protrusion 32 and the second protrusion 33 can be, but is not limited to, injection molding, die-casting, integrated machining and 3D printing, etc. The cylinder 31, the first protrusion 32 and the second protrusion 33 are an integrally formed part, which can reduce the risk of stress concentration caused by welding, riveting or threaded connection processes in traditional assembly, reduce the risk of structural damage due to failure of the connection interface, and improve the structural strength of the sleeve 30, thereby improving the reliability of the sleeve 30. At the same time, the traditional process requires the cylinder 31 and the protrusion to be processed separately, and then assembled through multiple processes (such as punching, welding, and polishing), while the integrated molding can complete the structural molding in one step, shortening the production cycle and improving the efficiency of processing the battery device 100.

[0078] It is understandable that before the frame 12 and the sleeve 30 are assembled and welded, the frame 12 is welded to other parts of the box assembly 10. For example, there are multiple welding processes between the frame 12 and the box 11, which causes the frame 12 to be greatly thermally deformed in the previous welding. The positions of the first hole 121a and the second hole 122a are offset as the deformation of the previous welding occurs, resulting in the deformation of the frame 12 and the tooling positioning interference between the frame 12 and the sleeve 30 during the sleeve tack welding process. The sleeve 30 interferes with the frame 12 when it is positioned. After the sleeve 30 is welded, the position of the sleeve 30 is eventually seriously deviated. Since the first hole 121a is the first hole through which the cylinder 31 passes, and the first hole 121a and the cylinder 31 are usually matched with a large clearance, the installation of the cylinder 31 is less affected. The second hole 122a is the last hole to be aligned with the cylinder 31. If the position deviation of the second hole 122a and the through hole 31a is large, the installation of the locating pin in the sleeve tack welding process is greatly affected, and there is a risk that the locating pin cannot pass through the second hole 122a.

[0079] In the above technical solution, since the aperture of the through hole 31a is smaller than the aperture of the second hole 122a, in the radial direction of the through hole 31a (see Figure 4In the first direction X), a gap is formed between the through hole 31a and the second hole 122a. The gap can provide space for the position deviation between the second hole 122a and the through hole 31a, and can play a role in absorbing tolerance, which is conducive to the successful passage of the positioning pin through the cylinder 31 and the second hole 122a, thereby improving the positioning accuracy between the sleeve 30 and the frame 12, and further improving the positioning accuracy between the sleeve 30 and the frame 12. Figure 5 and Figure 6 Since the inner edge line 331 is arranged on the side of the through hole 31a close to the outer edge line 332, and the outer edge line 332 is arranged on the side of the second hole 122a away from the inner edge line 331, after the second hole 122a and the through hole 31a are offset, redundant absorption space for position deviation can be further provided. At the same time, a crimping surface of appropriate size can be formed between the second protrusion 33 and the second wall portion 122, which can improve the support reliability between the second protrusion 33 and the second wall portion 122, thereby improving the installation reliability of the sleeve 30 and the frame 12.

[0080] In the above technical solution, the structural design of the above-mentioned sleeve 30 and the frame 12 is adopted, and a space for absorbing tolerance can be formed between the through hole 31a and the second hole 122a to absorb the positioning size deviation of the sleeve 30 caused by the deformation of the frame 12 after welding, so that the through hole 31a can be better connected with the second hole 122a, which is conducive to reducing interference and improving the positioning accuracy between the sleeve 30 and the frame 12, and can improve the connection reliability between the battery device 100 and the electrical device.

[0081] In some embodiments of the present application, reference is made to Figures 7 to 9 The inner edge line 331 is set between the hole wall surface of the through hole 31a and the hole wall surface of the second hole 122a.

[0082] It is understandable that the inner edge line 331, the hole wall surface of the through hole 31a and the hole wall surface of the second hole 122a do not coincide with each other. There is a gap between the inner edge line 331 and the hole wall surface of the second hole 122a.

[0083] In the above technical solution, when the second protrusion 33 needs to be welded to the second wall portion 122, this structure can be used to form a weld between the wall surface 122b of the second hole 122a and the end face 333 of the second protrusion 33, and the butt weld between the sleeve 30 and the second wall portion 122 is converted into a right-angle weld, thereby increasing the distance between the welding heat source and the hole wall surface of the through hole 31a, reducing the risk of deformation of the hole wall surface of the through hole 31a, and improving the reliability of the internal contour of the through hole 31a, thereby improving the positioning accuracy between the sleeve 30 and the frame 12, and improving the installation reliability of the battery device 100.

[0084] In some embodiments of the present application, reference is made to Figure 5, make a plane perpendicular to the thickness direction of the second wall portion 122, and the projection of the inner edge line 331 on the plane coincides with the projection of the hole wall surface of the second hole 122a on the plane.

[0085] The plane perpendicular to the thickness direction of the second wall portion 122 can be referred to as Figure 5 A plane perpendicular to the third direction Z.

[0086] In the above technical solution, the second protrusion 33 can have a larger crimping surface with the second wall portion 122, which can improve the support stability between the second protrusion 33 and the second wall portion 122, thereby improving the installation reliability of the sleeve 30 on the frame 12, and also improving the installation reliability of the battery device 100.

[0087] In some embodiments of the present application, reference is made to Figure 5 and Figure 8 In the radial direction of the through hole 31 a , the distance between the inner edge line 331 and the hole wall surface of the through hole 31 a is L1 , where 2 mm ≤ L1 ≤ 3 mm.

[0088] In the radial direction of the through hole 31a, reference can be made to Figure 5 The first direction X. L1 can be, but is not limited to, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, etc. Since the diameter of the second hole 122a is larger than the diameter of the through hole 31a, a gap that absorbs redundant deviations can be formed between the second hole 122a and the through hole 31a. If L1 is within the range of 2mm to 3mm, the inner edge line 331 and the hole wall surface of the through hole 31a can be made non-coplanar. When the end of the cylinder 31 close to the second protrusion 33 is flush with the second protrusion 33 (see FIG. 2 ), the inner edge line 331 and the hole wall surface of the through hole 31a can be made non-coplanar. Figure 5 ), at this time, the inner edge line 331 and the hole wall surface of the through hole 31a can be chamfered or rounded, thereby forming a flared structure on the sleeve 30, which is convenient for inserting the positioning pin and can further increase the gap for absorbing redundant deviations. When the end of the cylinder 31 close to the second protrusion 33 has a protruding structure with the second protrusion 33 (see Figure 8 The second cylindrical portion 312 ), L1 can provide a suitable wall thickness for the setting of the protruding structure.

[0089] That is, if L1 is less than 2 mm, the flared structure formed by the chamfer or fillet is too small, which is not conducive to installing the locating pin or increasing the gap for absorbing redundant deviation, nor is it conducive to the protruding structure forming a wall thickness of sufficient strength. If L1 is greater than 3 mm, the dimension between the inner edge line 331 and the outer edge line 332 is reduced, which in turn reduces the crimping surface between the second protrusion 33 and the second wall portion 122, affecting the installation reliability of the second protrusion 33 and the second wall portion 122. Moreover, when the protruding structure is provided on the barrel 31, it encroaches on the size of the gap for absorbing redundant deviation, which is not conducive to absorbing redundant deviation.

[0090] In the above technical solution, by setting the distance L1 between the inner edge line 331 and the hole wall surface of the through hole 31a within the above range, the redundant deviation can be better absorbed, the dimensional accuracy of the positioning welding of the sleeve 30 can be improved, and the reliability of the battery device 100 can be further improved.

[0091] In some embodiments of the present application, reference is made to Figure 5 and Figure 8 In the radial direction of the through hole 31a, the distance between the inner edge line 331 and the outer edge line 332 is L2, where 4mm≤L2≤5mm.

[0092] L2 can be, but is not limited to, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, etc.

[0093] In the above technical solution, by setting the distance L2 between the inner edge line 331 and the outer edge line 332 within the above range, a crimping surface of appropriate size can be formed between the second protrusion 33 and the second wall portion 122, thereby reducing the risk of the sleeve 30 detaching from the second wall portion 122 when absorbing redundant deviations, improving the reliability of the connection between the sleeve 30 and the second wall portion 122, and thereby improving the reliability of the battery device 100.

[0094] In some embodiments of the present application, reference is made to Figure 6 、 Figure 9 and Figure 11 The first protrusion 32 and the second protrusion 33 are arranged around the circumference of the cylinder 31.

[0095] It can be understood that the first protrusion 32 and the second protrusion 33 are annular structures, which can be, but are not limited to, a circular ring, a trapezoidal ring, a rectangular ring, etc.

[0096] In the above technical solution, the first protrusion 32 and the second protrusion 33 are arranged around the circumference of the cylinder 31. The first protrusion 32 and the second protrusion 33 can be an annular structure, so that the first protrusion 32 and the second protrusion 33 can constitute a double flange structure on the sleeve 30. Compared with the local protrusion design, the crimping surface between the first protrusion 32 and the second protrusion 33 and the frame 12 can be further increased, which is conducive to evenly distributing the load to the frame 12, reducing the risk of stress concentration caused by single-point force damaging the frame 12, and improving the reliability of the battery device 100.

[0097] In some embodiments of the present application, reference is made to Figure 4 、 Figure 7 and Figure 10 The inner diameter of the first hole 121a is larger than the inner diameter of the second hole 122a and is larger than or equal to the outer diameter of the second protrusion 33. The outer diameter of the first protrusion 32 is larger than the inner diameter of the first hole 121a.

[0098] In the above technical solution, the inner diameter of the first hole 121a is larger than the inner diameter of the second hole 122a, and is greater than or equal to the outer diameter of the second protrusion 33. The outer diameter of the first protrusion 32 is larger than the inner diameter of the first hole 121a, thereby forming a large gap between the sleeve 30 and the first wall portion 121, which can ensure that the second protrusion 33 can pass through the first hole 121a when the sleeve 30 is inserted, and the first protrusion 32 cannot pass through the first hole 121a, so that the sleeve 30 can be fixed in the frame 12.

[0099] In some embodiments of the present application, reference is made to Figure 4 and Figure 7 The first protrusion 32 is provided at one end of the axial direction of the cylinder 31. The axial direction of the cylinder 31 can be referred to Figure 4 In the third direction Z, the first protrusion 32 is provided at one end of the barrel 31 in the axial direction. This can reduce the overall axial size of the sleeve 30, save space, and reduce interference with other components when the battery device 100 is installed with other equipment or electrical devices, thereby reducing installation difficulty and facilitating improved energy density of the battery device 100.

[0100] In some embodiments of the present application, reference is made to Figure 4 and Figure 6The second protrusion 33 is provided at the other axial end of the barrel 31. In the above technical solution, based on the first protrusion 32 being provided at one axial end of the barrel 31, the second protrusion 33 is provided at the other axial end of the barrel 31. This further reduces the overall axial size of the sleeve 30, and the sleeve 30 can be inserted through the frame 12 alone. This reduces installation difficulty, saves installation space for the sleeve 30, and reduces the impact on the installation of other components on the battery device 100, further reducing installation difficulty and improving the energy density of the battery device 100.

[0101] In some embodiments of the present application, reference is made to Figure 5 and Figure 6 The cylinder 31 is provided with a transition surface 31 b connecting the hole wall surface of the through hole 31 a and the inner edge line 331 , and the diameter of the transition surface 31 b gradually increases in the direction from the first convex portion 32 to the second convex portion 33 .

[0102] In the direction from the first protrusion 32 to the second protrusion 33, reference can be made to Figure 5 The third direction Z.

[0103] In the direction from the first convex portion 32 to the second convex portion 33 , the diameter of the transition surface 31 b gradually increases. It is understandable that the transition surface 31 b may be, but is not limited to, an arc surface, an inclined surface, a curved surface, or the like.

[0104] In the above technical solution, the diameter of the transition surface 31b gradually increases in the direction from the first protrusion 32 to the second protrusion 33, thereby making the transition between the inner edge line 331 and the hole wall surface of the through hole 31a smoother, reducing the risk of stress concentration, improving the reliability of the sleeve 30, and forming a flared structure at one end of the sleeve 30 where the second protrusion 33 is arranged, which is convenient for installing components such as positioning pins or bolts.

[0105] In some embodiments of the present application, reference is made to Figure 5 and Figure 6 , the transition surface 31b is an inclined surface.

[0106] In the above technical solution, the transition surface 31b is an inclined surface, which can be formed in one step by turning, milling or stamping, thereby improving processing efficiency and reducing processing costs. The above solution has a simple structure and is easy to process and manufacture.

[0107] In some embodiments of the present application, reference is made to Figure 7 、 Figure 8 and Figure 9The cylinder 31 includes a first cylinder portion 311 and a second cylinder portion 312. The outer diameter of the second cylinder portion 312 is smaller than the outer diameter of the first cylinder portion 311 and is passed through the second hole 122a. The first convex portion 32 and the second convex portion 33 are arranged at both ends of the axial direction of the first cylinder portion 311, wherein the second convex portion 33 is arranged close to the second cylinder portion 312.

[0108] In the above technical solution, the sleeve 30 adopts the above structure to achieve double penetration with the frame 12, that is, the first barrel portion 311 is penetrated by the first wall portion 121, and the second barrel portion 312 is penetrated by the second wall portion 122. The sleeve 30 adopting this double penetration structure can improve the connection reliability with the frame 12, and also facilitate the positioning of the sleeve 30 on the frame 12, which is conducive to improving the positioning accuracy of the sleeve 30. The outer diameter of the second barrel portion 312 is smaller than that of the first barrel portion 311, and the sleeve 30 as a whole forms a "stepped shaft" structure. This can improve the structural strength of the main part of the sleeve 30, and then, while satisfying the requirement that the sleeve 30 passes through the second wall portion 122, the overall structural strength of the sleeve 30 is increased, which can improve the installation reliability between the sleeve 30 and the frame 12. Secondly, the second barrel portion 312 protruding from the second wall portion 122 can also provide a support position for other components in the vehicle or electrical device using the battery device 100.

[0109] In some embodiments of the present application, reference is made to Figure 10 and Figure 11 The cylinder 31 includes a first cylinder portion 311, a second cylinder portion 312 and a third cylinder portion 313. The second cylinder portion 312 and the third cylinder portion 313 are arranged at both ends of the first cylinder portion 311 in the axial direction. The second cylinder portion 312 is passed through the second hole 122a, and the third cylinder portion 313 is passed through the first hole 121a. The first convex portion 32 is arranged at one end of the first cylinder portion 311 close to the third cylinder portion 313, and the second convex portion 33 is arranged at the other end of the first cylinder portion 311 close to the second cylinder portion 312.

[0110] In the above technical solution, the second barrel portion 312 and the third barrel portion 313 are provided at both ends of the first barrel portion 311 in the axial direction. The sleeve 30 adopts the above structure and can also achieve double penetration with the frame 12. The sleeve 30 adopting this double penetration structure can improve the reliability of the connection with the frame 12, and also facilitate the positioning of the sleeve 30 on the frame 12, which is conducive to improving the positioning accuracy of the sleeve 30. When the battery device 100 is installed in a vehicle 1000 or other electrical device, if there is a gap between the ends of the frame 12 in the third direction and the vehicle 1000 or the electrical device, the second barrel portion 312 and the third barrel portion 313 can provide support positions, thereby improving the reliability of the battery device 100.

[0111] In some embodiments of the present application, reference is made to Figure 4 、 Figure 7 、 Figure 10 、 Figure 12 and Figure 13 , the first wall portion 121 is located on the upper side of the second wall portion 122 ; or, the first wall portion 121 is located on the lower side of the second wall portion 122 .

[0112] Reference Figure 4 、 Figure 7 and Figure 10 , the first wall portion 121 is located on the upper side of the second wall portion 122, and the sleeve 30 is installed on the frame 12 in a normal manner. Figure 12 and Figure 13 The first wall portion 121 is located at the lower side of the second wall portion 122 , and the sleeve 30 is installed on the frame 12 in an inverted manner.

[0113] In the above technical solution, when the first wall portion 121 is located on the upper side of the second wall portion 122, the installation of the sleeve 30 on the frame 12 can be called upright installation, which is suitable for top loading scenarios. For example, when the battery device 100 is installed from top to bottom, the first wall portion 121 can bear the weight of the module and transfer it to the bottom support structure through the sleeve 30, thereby preventing the second wall portion 122 from bearing cantilever loads. When the first wall portion 121 is located on the lower side of the second wall portion 122, the installation of the sleeve 30 on the frame 12 can be called inverted installation, which is suitable for bottom support scenarios. For example, when the battery device 100 is fixed to the vehicle chassis, the second wall portion 122 on the upper side can prevent rainwater and mud from accumulating, and the first wall portion 121 on the lower side is bolted to the chassis to improve pull-out resistance. It can be understood that the first wall portion 121 being located on the upper side of the second wall portion 122, or the first wall portion 121 being located on the lower side of the second wall portion 122, can expand the installation and use scenarios of the battery device 100.

[0114] In some embodiments of the present application, reference is made to Figure 3 The box assembly 10 may include a box body 11 , and a frame 12 is arranged around the circumference of the box body 11 .

[0115] In the above technical solution, the frame 12 is arranged around a rigid ring beam, which can evenly distribute the circumferential load of the box 11, avoid deformation caused by localized forces, and improve the structural strength of the box 11. At the same time, it can also stably fix the battery device 100 to the electrical device, improving the reliability of the connection between the battery device 100 and the electrical device.

[0116] In some embodiments of the present application, reference is made to Figure 3 The frame 12 includes a frame body 123 and a side beam 124 . The frame body 123 is arranged around the circumference of the box body 11 . The side beam 124 is arranged on at least two sides of the frame body 123 . The first wall portion 121 and the second wall portion 122 are arranged on the side beam 124 .

[0117] It is understood that the side beams 124 can be provided on both sides of the frame body 123, or on three sides, four sides, etc. of the frame body 123. The frame body 123 and the side beams 124 can be connected by welding, which can be, but is not limited to, arc welding, laser welding, resistance welding, ultrasonic welding, etc.

[0118] In the above technical solution, the frame body 123 is arranged around the circumference of the box body 11 to form a basic load-bearing ring, and the side beams 124 can be distributed on both sides as reinforcement ribs to construct a composite support system, thereby improving the structural strength of the frame 12 and improving the reliability of the battery device 100.

[0119] An embodiment of the present application provides an electrical device, including the battery device 100 as described in any of the above embodiments.

[0120] In the above technical solution, since the battery device 100 has high reliability, it is beneficial to improve the reliability of the electrical device using the battery device 100 .

[0121] A specific embodiment of the battery device 100 of the present invention will be described below with reference to the accompanying drawings.

[0122] Example 1

[0123] Reference Figures 3 to 6 The battery device 100 includes a box assembly 10 , a battery cell assembly 20 and a sleeve 30 .

[0124] The box assembly 10 includes a box body 11 and a frame 12. The frame 12 includes a frame body 123 and side beams 124. The frame body 123 is arranged around the circumference of the box body 11, and the side beams 124 are arranged on both sides of the frame body 123. A first wall portion 121 and a second wall portion 122 are provided on the side beam 124. The first wall portion 121 and the second wall portion 122 are arranged at intervals along the height direction of the box body 11, and the first wall portion 121 is located on the upper side of the second wall portion 122. The first wall portion 121 is provided with a first hole 121a, and the second wall portion 122 is provided with a second hole 122a. The inner diameter of the first hole 121a is larger than the inner diameter of the second hole 122a, and is greater than or equal to the outer diameter of the second protrusion 33. The outer diameter of the first protrusion 32 is larger than the inner diameter of the first hole 121a.

[0125] The battery cell assembly 20 is disposed in the box 11 .

[0126] The sleeve 30 is an integrally formed part and includes a barrel 31, a first protrusion 32, and a second protrusion 33. The first protrusion 32 and the second protrusion 33 are disposed at both ends of the barrel 31 in the axial direction. The first protrusion 32 and the second protrusion 33 are arranged around the circumference of the barrel 31. The first protrusion 32 is disposed on the side of the first wall 121 away from the interior of the frame 12, and the second protrusion 33 is disposed on the side of the second wall 122 located within the interior of the frame 12. The barrel 31 is provided with a through hole 31a, which extends through the first hole 121a.

[0127] The diameter of through hole 31a is smaller than that of second hole 122a. Second protrusion 33 has an inner edge line 331 and an outer edge line 332. Inner edge line 331 is closer to through hole 31a than outer edge line 332. Inner edge line 331 is located on the side of the through hole 31a's wall surface closer to outer edge line 332, while outer edge line 332 is located on the side of the second hole 122a's wall surface farther from inner edge line 331. Inner edge line 331 is located between the wall surface of through hole 31a and the wall surface of second hole 122a.

[0128] It is understandable that since the box body 11 and the frame 12 need to undergo multiple welding processes before the sleeve 30 is assembled and welded, the frame 12 is greatly thermally deformed during the previous welding, and the position of the sleeve mounting hole of the frame 12 is offset due to the deformation of the previous welding; the deformed frame 12 causes interference between the frame 12 and the tooling positioning during the sleeve positioning welding process, and the sleeve interferes with the frame 12 during positioning. After the sleeve 30 is welded, the position of the sleeve 30 is eventually seriously deviated.

[0129] The sleeve 30 of the battery device 100 in the above embodiment can constitute a single-through double-flange sleeve structure. When the sleeve 30 of the double-flange structure and the sleeve mounting hole of the frame 12 are positioned on the tooling, the positioning pin of the tooling is directly positioned on the sleeve 30. Due to the existence of the upper and lower flange surfaces, the sleeve 30 itself and the mounting hole of the frame 12 adopt a large gap transition fit design. At the same time, the butt weld can also be converted into a right-angle weld, further reducing the deformation of the sleeve after positioning welding, meeting the interference avoidance when the frame 12 and the tooling are positioned, and the interference avoidance when the sleeve 30 and the tooling and frame 12 are positioned. The angle conversion of the welding feature after the sleeve 30 is positioned can achieve the purpose of tolerance absorption of the welding deformation of the frame 12 in the previous process, and ultimately achieve the high dimensional accuracy requirements of the sleeve 30 positioning welding.

[0130] Example 2

[0131] Reference Figure 3 、 Figures 7 to 9 The structure of the battery device 100 of the second embodiment is substantially the same as that of the battery device 100 of the first embodiment, except that:

[0132] The sleeve 30 includes a first cylindrical portion 311 and a second cylindrical portion 312. The outer diameter of the second cylindrical portion 312 is smaller than the outer diameter of the first cylindrical portion 311 and is passed through the second hole 122a. The first protrusion 32 and the second protrusion 33 are arranged at both ends of the axial direction of the first cylindrical portion 311, wherein the second protrusion 33 is arranged close to the second cylindrical portion 312.

[0133] The sleeve 30 of the battery device 100 in the above embodiment may form a double-penetrating double-flange sleeve structure and be installed in a normal manner with the frame 12 .

[0134] Example 3

[0135] Reference Figure 12 The structure of the battery device 100 of the third embodiment is substantially the same as that of the battery device 100 of the second embodiment, except that the first wall portion 121 is located below the second wall portion 122 .

[0136] The sleeve 30 of the battery device 100 of the above embodiment may form a double-penetrating double-flange sleeve structure, and may be mounted with the frame 12 in a flip-chip manner opposite to that of the second embodiment.

[0137] Example 4

[0138] Reference Figure 3 、 Figure 10 、 Figure 11 The structure of the battery device 100 of the fourth embodiment is substantially the same as that of the battery device 100 of the first embodiment, except that:

[0139] The cylinder body 31 includes a first cylinder portion 311, a second cylinder portion 312 and a third cylinder portion 313. The second cylinder portion 312 and the third cylinder portion 313 are arranged at both ends of the first cylinder portion 311 in the axial direction. The second cylinder portion 312 is passed through the second hole 122a, and the third cylinder portion 313 is passed through the first hole 121a. The first protrusion 32 is arranged at one end of the first cylinder portion 311 close to the third cylinder portion 313, and the second protrusion 33 is arranged at the other end of the first cylinder portion 311 close to the second cylinder portion 312.

[0140] The sleeve 30 of the battery device 100 in the above embodiment may form a double-penetrating double-flange sleeve structure and be installed in a normal manner with the frame 12 .

[0141] Example 5

[0142] Reference Figure 13 The structure of the battery device 100 of the fifth embodiment is substantially the same as that of the battery device 100 of the fourth embodiment, except that the first wall portion 121 is located below the second wall portion 122 .

[0143] The sleeve 30 of the battery device 100 of the above embodiment may form a double-penetrating double-flange sleeve structure, and may be mounted with the frame 12 in a flip-chip manner opposite to that of the fourth embodiment.

[0144] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The above are only preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, unless otherwise specified, all embodiments and optional embodiments of this application can be combined with each other to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form new technical solutions. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A battery device, characterized in that: include: The box assembly includes a frame, the frame including a first wall portion and a second wall portion spaced apart from each other, the first wall portion is provided with a first hole, and the second wall portion is provided with a second hole; A battery cell assembly, wherein the battery cell assembly is arranged in the box assembly; A sleeve comprising a barrel, a first convex portion, and a second convex portion, wherein the first convex portion and the second convex portion are spaced apart along the axial direction of the barrel, the barrel is passed through the first hole, the first convex portion is provided on a side of the first wall portion located outside the frame, and the second convex portion is provided on a side of the second wall portion located inside the frame, and the barrel, the first convex portion, and the second convex portion are integrally formed. In which, the cylinder is provided with a through hole, which passes through the cylinder along the central axis of the cylinder, the aperture of the through hole is smaller than the aperture of the second hole, the second convex portion has an inner edge line and an outer edge line, the inner edge line is closer to the through hole relative to the outer edge line, the inner edge line is arranged on the side of the through hole close to the outer edge line, and the outer edge line is arranged on the side of the second hole away from the inner edge line.

2. The battery device according to claim 1, wherein: The inner edge line is arranged between the hole wall surface of the through hole and the hole wall surface of the second hole.

3. The battery device according to claim 1, wherein: A plane perpendicular to the thickness direction of the second wall portion is drawn, and the projection of the inner edge line on the plane coincides with the projection of the hole wall surface of the second hole on the plane.

4. The battery device according to any one of claims 1 to 3, characterized in that In the radial direction of the through hole, the distance between the inner edge line and the hole wall surface of the through hole is L1, wherein 2mm≤L1≤3mm.

5. The battery device according to claim 1, wherein: In the radial direction of the through hole, the distance between the inner edge line and the outer edge line is L2, wherein 4mm≤L2≤5mm.

6. The battery device according to claim 1, wherein: The first convex portion and the second convex portion are arranged around the circumference of the cylinder.

7. The battery device according to claim 6, characterized in that The inner diameter of the first hole is larger than the inner diameter of the second hole and is larger than or equal to the outer diameter of the second convex portion. The outer diameter of the first convex portion is larger than the inner diameter of the first hole.

8. The battery device according to claim 1, wherein: The first protrusion is provided at one end of the cylindrical body in the axial direction.

9. The battery device according to claim 8, characterized in that The second protrusion is provided at the other end of the cylindrical body in the axial direction.

10. The battery device according to claim 9, characterized in that The cylindrical body is provided with a transition surface connecting the hole wall surface of the through hole and the inner edge line, and the diameter of the transition surface gradually increases in the direction from the first convex portion to the second convex portion.

11. The battery device according to claim 10, characterized in that The transition surface is an inclined surface.

12. The battery device according to claim 8, wherein: The cylindrical body includes a first cylindrical portion and a second cylindrical portion, the outer diameter of the second cylindrical portion is smaller than the outer diameter of the first cylindrical portion, and is passed through the second hole, the first convex portion and the second convex portion are arranged at both ends of the axial direction of the first cylindrical portion, wherein the second convex portion is arranged close to the second cylindrical portion.

13. The battery device according to claim 1, wherein: The cylindrical body includes a first cylindrical portion, a second cylindrical portion and a third cylindrical portion, the second cylindrical portion and the third cylindrical portion are arranged at both ends of the axial direction of the first cylindrical portion, the second cylindrical portion is passed through the second hole, the third cylindrical portion is passed through the first hole, the first convex portion is arranged at one end of the first cylindrical portion close to the third cylindrical portion, and the second convex portion is arranged at the other end of the first cylindrical portion close to the second cylindrical portion.

14. The battery device according to claim 12 or 13, characterized in that: The first wall portion is located above the second wall portion; or the first wall portion is located below the second wall portion.

15. The battery device according to claim 1, wherein: The box assembly includes a box, and the frame is arranged around the circumference of the box.

16. The battery device according to claim 15, characterized in that The frame includes a frame body and side beams. The frame body is arranged around the circumference of the box body. The side beams are arranged on at least two sides of the frame body. The first wall portion and the second wall portion are arranged on the side beams.

17. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 16.

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