Battery device and electric device

Abstract

The utility model relates to a battery device and a power utilization device. The battery device comprises a plate body and a sleeve assembly, the plate body is provided with a hanging part, and a through hole is formed in the hanging part; the sleeve assembly comprises two sleeves, and the two sleeves are arranged at the two axial ends of the through hole correspondingly. The sleeve comprises a first section and a second section which are connected, the outer diameter of the first section is larger than that of the second section, the first section is provided with a first end close to the second section in the axial direction of the sleeve, the first end abuts against the surface of the hanging part around the through hole, and the second section is arranged in the through hole; the distance between the two side surfaces, oppositely arranged in the axial direction of the through hole, of the hanging part is larger than or equal to the sum of the lengths of the second sections of the two sleeves. According to the battery device, the two sleeves are assembled to the two opposite sides of the hanging part correspondingly, the installation difficulty during sleeve assembly can be reduced, the assembly efficiency can be improved, the perpendicularity and the end face profile tolerance of the sleeves after installation are improved, and the installation precision of the battery device can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development. Among them, the battery is usually fixed on the vehicle body in a hanging manner.

[0003] In the related art, a through hole is arranged on the battery box, and a sleeve is embedded in the through hole to form a hanging point. The sleeve is used to pass through a connecting bolt, and the connecting bolt is used to fixedly connect the battery and the vehicle body, so that the battery is hung on the vehicle body. However, the sleeve in the related art has high installation difficulty when assembled with the battery box, is not easy to assemble, and affects the perpendicularity and profile after the sleeve is installed, thereby affecting the subsequent assembly of the battery. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which can reduce the installation difficulty of the sleeve assembly, improve the perpendicularity and profile after the sleeve is installed, and facilitate the assembly of the battery device and the power utilization device body.

[0005] In the first aspect, the present application provides a battery device, comprising: a plate body provided with a mounting portion, the mounting portion being provided with a through hole; a sleeve assembly comprising two sleeves, the two sleeves being arranged at the axial two ends of the through hole; the sleeve comprises a first section and a second section connected with each other, the outer diameter of the first section is greater than the outer diameter of the second section, the first section has a first end close to the second section along the axial direction of the sleeve, the first end abuts against the surface of the mounting portion around the through hole, and the second section is arranged in the through hole; wherein the distance between the two side surfaces of the mounting portion arranged opposite to each other along the axial direction of the through hole is greater than or equal to the sum of the lengths of the second sections of the two sleeves.

[0006] In the technical scheme of the present application, by arranging two sleeves to be assembled to the opposite two sides of the mounting portion along the axial direction of the through hole, the assembly process control requirement can be reduced, thereby reducing the installation difficulty of the sleeve assembly, and the installation is simple and convenient, which can improve the assembly efficiency. By arranging the distance between the two side surfaces of the mounting portion arranged opposite to each other along the axial direction of the through hole to be greater than or equal to the sum of the lengths of the second sections of the two sleeves, the gap between the end faces of the second sections of the two sleeves away from the first section along the axial direction of the sleeve after assembly is ensured, which can reduce the interference between the two sleeves, reduce the deformation and skew of the sleeve after installation, thereby improving the perpendicularity and profile of the sleeve after installation, which is beneficial to the subsequent assembly of the battery device, is beneficial to improving the installation precision of the battery device, and further improves the connection stability of the battery device and the power utilization device body.

[0007] In some embodiments, the battery device further comprises a box body and a battery cell assembly, the battery cell assembly is accommodated in the box body; wherein the box body is provided with a plate body, the sleeve assembly is used for fixing the box body to the electric device; or the battery cell assembly is provided with a plate body, and the sleeve assembly is used for fixing the battery cell assembly in the box body. In this way, the box body and the battery cell assembly are conveniently fixedly connected to the main body of the electric device, and the reliability and stability of the connection between the battery device and the main body of the electric device are improved.

[0008] In some embodiments, the sleeve further comprises an adhesive layer, the adhesive layer is arranged between the end face of the first end of the first section and the surface of the mounting portion around the through hole, and the adhesive layer adhesively connects the first section and the mounting portion. By adhesively connecting the first section and the mounting portion through the adhesive layer, the mechanical strength and connection firmness of the connection between the sleeve and the mounting portion can be improved, the installation difficulty can be reduced, the assembly efficiency can be improved, and the cost can be reduced.

[0009] In some embodiments, the end face of the first end of the first section is provided with a recess, and at least part of the adhesive layer is located in the recess. By arranging the recess, the adhesive layer can be stably connected between the end face of the first end of the first section of the sleeve and the surface of the mounting portion by the limiting action of the recess, and the adhesion area can be increased and the adhesion strength can be improved, thereby improving the connection strength and connection firmness of the sleeve and the mounting portion.

[0010] In some embodiments, along the radial direction of the sleeve, the recess is arranged on the side of the first end of the first section close to the second section; in this way, the glue coating thickness can be controlled, the thickness consistency of the adhesive layer can be improved, and the assembly precision of the sleeve can be improved, thereby improving the perpendicularity and end face profile after the sleeve is installed.

[0011] In some embodiments, along the radial direction of the sleeve, the recess is arranged on the side of the first end of the first section away from the second section; in this way, the surface of the mounting portion can be matched, the thickness consistency of the adhesive layer can be improved, the assembly precision of the sleeve can be improved, and the perpendicularity and end face profile after the sleeve is installed can be improved.

[0012] In some embodiments, the first end of the first section is provided with at least two positioning protrusions protruding from the end face of the first end, and the at least two positioning protrusions are arranged around the second section at intervals. By arranging the at least two positioning protrusions to control the thickness of the adhesive layer, the control precision of the thickness of the adhesive layer can be improved, the thickness consistency of the adhesive layer can be improved, the assembly precision of the sleeve can be improved, and the perpendicularity and profile of the axial opposite two sides of the sleeve after installation can be improved.

[0013] In some embodiments, the surface of the mounting portion around the through hole is concave and provided with at least two positioning recesses, the at least two positioning recesses are arranged one by one corresponding to the at least two positioning protrusions, and the positioning protrusions and the positioning recesses can be connected in cooperation. By arranging the positioning recesses and the positioning protrusions to connect in cooperation, the assembly accuracy of the sleeve and the mounting portion can be further improved, and the relative rotation of the sleeve and the mounting portion can be limited, thereby improving the connection stability of the sleeve and the mounting portion.

[0014] In some embodiments, the first end of the first section and the surface of the mounting portion around the through hole are both provided with a limiting structure, and the limiting structure is used to limit the rotation of the sleeve relative to the mounting portion. By arranging the limiting structure to limit the rotation of the sleeve relative to the mounting portion, the connection stability of the sleeve and the mounting portion can be improved, thereby improving the connection stability of the battery device and the main body of the power consumption device.

[0015] In some embodiments, the second section is in interference fit with the through hole. In this way, the sleeve can be fixed on the mounting portion, the shaking of the sleeve can be reduced, the connection stability of the sleeve and the mounting portion can be improved, and the sleeve is in interference fit at one place, which can reduce the control requirements of the assembly process, thereby reducing the installation difficulty of the sleeve assembly.

[0016] In some embodiments, the second section has a third end away from the first section along the axial direction of the sleeve, and the end face of the third end away from the center axis of the sleeve is provided with a chamfer. By arranging the chamfer, the second section can be conveniently pressed into the through hole of the mounting portion during assembly of the sleeve, the interference fit of the second section and the through hole can be conveniently completed, the smoothness of the second section inserted into the through hole can be improved, the installation difficulty of the sleeve can be reduced, the installation is simple and convenient, and the assembly efficiency can be improved.

[0017] In some embodiments, the second section includes an interference section and a guide section, the interference section is connected to the first section, the guide section is connected to one end of the interference section away from the first section along the axial direction of the sleeve, the interference section is in interference fit with the through hole, the outer diameter of the guide section is smaller than the outer diameter of the interference section, and the outer diameter of the guide section gradually decreases away from the interference section along the axial direction of the sleeve. By arranging the guide section, the resistance of the interference section of the second section pressed into the through hole of the mounting portion during assembly of the sleeve can be reduced, the interference fit of the second section and the through hole can be conveniently completed, the smoothness of the second section inserted into the through hole can be improved, the installation difficulty of the sleeve can be reduced, the installation is simple and convenient, and the assembly efficiency can be improved.

[0018] In a second aspect, the present application provides a power consumption device, which includes the battery device in any of the above embodiments, and the battery device is used to provide electric energy.

[0019] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the present application. Moreover, in the drawings, like reference numerals refer to similar components throughout the several views. In the drawings:

[0021] Figure 1 Structure diagram of a vehicle for some embodiments of the present application.

[0022] Figure 2 Exploded structure diagram of a battery device for some embodiments of the present application.

[0023] Figure 3 Partial structure diagram of a battery device for some embodiments of the present application.

[0024] Figure 4 Structure diagram of a sleeve assembly and a mounting portion assembly for some embodiments of the present application.

[0025] Figure 5 Structure diagram of a sleeve for some embodiments of the present application. Figure 4 Enlarged structure diagram of A in FIG. 6.

[0026] Figure 6 Structure diagram of a mounting portion for some embodiments of the present application.

[0027] Figure 7 Structure diagram of a sleeve for some embodiments of the present application.

[0028] Figure 8 Structure diagram of a battery cell assembly for some embodiments of the present application.

[0029] Figure 9 Structure diagram of a sleeve from another perspective for some embodiments of the present application.

[0030] Figure 10 Structure diagram of a sleeve for some other embodiments of the present application.

[0031] Figure 11 Structure diagram of a mounting portion for some other embodiments of the present application.

[0032] Reference numerals in the detailed description are as follows:

[0033] 1000, vehicle; 100, battery device; 200, controller; 300, motor

[0034] 10, box; 11, first part; 12, second part; 20, battery cell; 30, sleeve assembly; 31, sleeve; 310, mounting hole; 311, first section; 3110, first end; 3111, recess; 3112, convex adhesive surface; 312, second section; 3120, third end; 3121, interference section; 3122, guide section; 3123, chamfer; 313, adhesive layer; 314, positioning protrusion; 40, plate body; 41, mounting portion; 411, through hole; 412, positioning recess; 50, battery cell assembly; 51, end plate. DETAILED DESCRIPTION

[0035] In order to make the above objectives, features and advantages of the present application more clear and easily understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0036] In this document, reference to“an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those skilled in the art will appreciate that embodiments described herein can be combined with other embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the use of the terms“including,”“comprising,” or“having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0038] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present application and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In the description of the embodiments of the present application, the terms "first", "second" are only for descriptive purposes, to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0040] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0041] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, a first feature is "on", "above", or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact with an intervening medium. Also, the first feature "over", "above", and "on" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature "under", "below", and "on" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0043] It should be noted that an element referred to as being "fixed" or "disposed" on another element can be directly on the other element or can have an intervening element. An element referred to as being "connected" to another element can be directly connected to the other element or can have an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used herein are for purposes of description only and are not intended to be limiting.

[0044] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development. Among them, the battery is usually fixed on the vehicle body in a hanging manner.

[0045] In the related art, a plurality of mounting points are provided on the side plate of the battery box, the mounting points are provided with through holes, sleeves are embedded in the through holes, the sleeves are used for allowing connecting bolts to pass through, the connecting bolts are used for fixedly connecting the battery box and the vehicle body, so that the battery is hung and fixed on the vehicle body. The commonly used sleeve structure is a T-shaped sleeve, and the connection mode of the T-shaped sleeve and the mounting point of the battery box is mainly interference connection and adhesive connection. For example, the axial two ends of the T-shaped sleeve have two interference positions, and during assembly, the T-shaped sleeve is connected with the axial two ends of the through hole through two interference fittings, and then the T-shaped head of the T-shaped sleeve is adhered to the mounting point. In this way, the double interference fitting and the adhesive connection can make the sleeve structure have high mechanical strength. However, the two interference fittings require high assembly process control, the double interference fitting and the adhesive connection make the installation difficulty of the sleeve and the battery box during assembly high, and the sleeve is not easy to assemble, and the sleeve is prone to deformation or skew, which affects the perpendicularity and profile of the sleeve after installation, and further affects the assembly of the battery and the vehicle body.

[0046] Based on the above considerations, in order to reduce the installation difficulty of the sleeve and the battery box during assembly, and improve the perpendicularity and profile of the sleeve after installation, the application designs a battery device, which adopts two sleeves respectively assembled to the mounting part of the battery box along the axial direction of the through hole on the opposite sides, and the axial end portions of the two sleeves have a gap, which can improve the problem of double interference of the sleeve and reduce the installation difficulty of the sleeve and the battery box during assembly, and improve the perpendicularity and profile of the sleeve after installation, and facilitate the assembly of the battery device and the vehicle body.

[0047] The battery device disclosed in the embodiments of the application can be used in an electric device such as a vehicle, a ship or an aircraft, and a power supply system of the electric device can be composed of the battery device disclosed in the application. The battery device can be a battery pack, but is not limited to this. In this way, the assembly of the battery device and the main body of the electric device is facilitated.

[0048] The embodiments of the application provide an electric device using the battery device as a power supply. The electric device can be a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0049] The following embodiments are described with reference to a vehicle 1000 as an example of an electric device of some embodiments of the application for convenience of description.

[0050] The battery device described in the embodiments of the application is not only limited to the electric device described above, but can also be applied to all devices using batteries. However, for the sake of brevity of description, the following embodiments are described with reference to an electric car as an example.

[0051] For example, refer to Figure 1 , Figure 1 A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the application. The vehicle 1000 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid electric car or an extended range car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0052] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0053] Please refer to Figure 2 , Figure 2 The exploded structural schematic diagram of the battery device 100 provided in some embodiments of the present application is shown. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. The box body 10 is used to provide a containing space for the battery cell 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first part 11 and a second part 12, the first part 11 and the second part 12 are mutually covered, and the first part 11 and the second part 12 jointly define a containing space for containing the battery cell 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-shaped structure, which covers the open side of the second part 12 to jointly define the containing space with the second part 12; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0054] In the battery device 100, the battery cell 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel or in a mixed manner, and then the whole of the multiple battery cells 20 is contained in the box body 10; of course, the battery device 100 can also be that the multiple battery cells 20 are first connected in series, in parallel or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series, in parallel or in a mixed manner to form a whole, which is contained in the box body 10. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 20.

[0055] 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 thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0056] According to some embodiments of the present application, please refer to Figures 3 to 7 , Figure 3 The partial structural schematic diagram of the battery device 100 in some embodiments of the present application is shown, Figure 4Fig. 2 shows a schematic view of the assembly of the sleeve assembly 30 and the mounting portion 41 in some embodiments of the present application, Figure 5 Fig. 3 shows a schematic view of the mounting portion 41 in some embodiments of the present application, Figure 4 Fig. 4 shows a schematic view of the sleeve 31 in some embodiments of the present application, Figure 6 Fig. 5 shows a schematic view of the sleeve assembly 30 in some embodiments of the present application, Figure 7 The present application provides a battery device 100. The battery device 100 comprises a plate body 40 and a sleeve assembly 30. The plate body 40 is provided with a mounting portion 41, and a through hole 411 is formed in the mounting portion 41. The sleeve assembly 30 comprises two sleeves 31, and the two sleeves 31 are respectively arranged at the two axial ends of the through hole 411. The sleeve 31 comprises a first section 311 and a second section 312 connected with each other, the outer diameter of the first section 311 is greater than the outer diameter of the second section 312, the first section 311 has a first end 3110 close to the second section 312 along the axial direction of the sleeve 31, the first end 3110 abuts against the surface of the mounting portion 41 around the through hole 411, and the second section 312 is arranged in the through hole 411. The distance between the two opposite surfaces of the mounting portion 41 along the axial direction of the through hole 411 is greater than or equal to the sum of the lengths of the second sections 312 of the two sleeves 31.

[0057] As shown in Fig. 1, the Z direction in the figure is the axial direction of the through hole 411 and the axial direction of the sleeve 31. Figures 4 to 7 The plate body 40 of the battery device 100 can be a partial structure defining the external contour of the battery device 100, for example, the plate body 40 can be a side plate around the battery device 100, and the mounting portion 41 is fixedly connected to the side plate. The plate body 40 can also be an internal structure of the battery device 100, for example, the plate body 40 can be a side plate of a battery cell 20 assembly, and the mounting portion 41 is arranged on the side plate of the battery cell 20 assembly. The structure of the plate body 40 is not limited herein. The mounting portion 41 is used for hanging the battery device 100, and the mounting portion 41 can be fixedly connected to the body of the electric device by a fastener penetrating through the through hole 411 in the mounting portion 41, so as to hang the battery device 100 on the body of the electric device. The number of the mounting portions 41 can be multiple, and the multiple mounting portions 41 are distributed at intervals around the battery device 100, and the battery device 100 is hung by the multiple mounting portions 41 around the battery device 100, so that the stress is evenly distributed, and the carrying capacity can be improved. The through hole 411 penetrates through the opposite surfaces of the mounting portion 41 along the hanging direction of the mounting portion 41, that is, the axial direction of the through hole 411 is parallel to the hanging direction of the mounting portion 41, and the hanging direction of the mounting portion 41 refers to the stress direction of the mounting portion 41 when the battery device 100 is hung. In some embodiments, the thickness direction of the mounting portion 41 is parallel to the hanging direction of the mounting portion 41.

[0058]

[0059] ​The sleeve assembly 30 is arranged at the mounting portion 41 of the plate body 40. The sleeve 31 is partially arranged in the through hole 411 of the mounting portion 41, so as to reduce the gap between the through hole 411 and the fastener. The sleeve 31 can be substantially in the shape of a stepped shaft. The sleeve 31 can include two segments with different diameters, i.e., a first segment 311 and a second segment 312 connected to the first segment 311. The first segment 311 has a first end 3110 close to the second segment 312 along the axial direction of the sleeve 31 and a second end away from the second segment 312. Similarly, the second segment 312 has a third end 3120 away from the first segment 311 along the axial direction of the sleeve 31 and a fourth end close to the first segment 311. The diameter of the first segment 311 is greater than that of the second segment 312, and the diameter of the first segment 311 is greater than the diameter of the through hole 411. In this way, the end face of the first end 3110 of the first segment 311 close to the second segment 312 along the axial direction of the sleeve 31 forms a stepped surface around the second segment 312, i.e., the end face of the first end 3110 of the first segment 311 is an annular stepped surface.

[0060] The first segment 311 is arranged outside the through hole 411 when the sleeve 31 is arranged at the mounting portion 41, so as to limit the sleeve 31 and reduce the structure of the sleeve 31 sinking into the through hole 411. The second segment 312 is at least partially arranged in the through hole 411 when the sleeve 31 is arranged at the mounting portion 41. The sleeve 31 further has a mounting hole 310 penetrating the first segment 311 and the second segment 312. The mounting hole 310 is coaxially arranged with the second segment 312 and is used to pass the fastener. The shape of the second segment 312 of the sleeve 31 is matched with the shape of the through hole 411. For example, the first segment 311 and the second segment 312 of the sleeve 31 can be cylindrical segments, and the through hole 411 can be a circular hole. Of course, the second segment 312 of the sleeve 31 can also be other shapes, such as an elliptical cylindrical segment, a prismatic segment, etc., which are not limited herein. In some embodiments, the sleeve 31 can be a plastic part, so as to reduce the weight and cost of the sleeve 31. The sleeve 31 can also be a metal part with high hardness, etc., which are not limited herein. The connection mode of the first segment 311 and the second segment 312 can be but not limited to one-piece injection molding, etc. The one-piece injection molding mode can enhance the connection strength and firmness of the first segment 311 and the second segment 312.

[0061] When the sleeve 31 is connected with the mounting portion 41, the second section 312 of the sleeve 31 is inserted into the through hole 411, so that the connection of the sleeve 31 and the mounting portion 41 is realized. The first section 311 of the sleeve 31 abuts against the surface of the mounting portion 41 around the through hole 411, which can reduce the probability of the overall axial movement of the sleeve 31 into the through hole 411, limit the movement distance of the sleeve 31 along the axial direction of the through hole 411 during assembly, and thus play an axial limiting role on the sleeve 31. The sleeve 31 and the mounting portion 41 are combined and connected by a mechanical connection mode, instead of a traditional welding connection mode, which can improve the problem of complex processing tool caused by welding, save production cost, reduce the deformation problem caused by welding, and thus reduce the secondary deformation phenomenon of the battery device 100 after assembly, and can reduce the assembly process control requirement.

[0062] The sleeve assembly 30 includes two sleeves 31. When the sleeve assembly 30 is assembled with the mounting portion 41, the second section 312 of one of the sleeves 31 is inserted into the through hole 411 of the mounting portion 41 from one axial end of the through hole 411 until the first section 311 of the sleeve 31 abuts against one side surface of the mounting portion 41 along the axial direction of the through hole 411; and the second section 312 of the other sleeve 31 is inserted into the through hole 411 of the mounting portion 41 from the other axial end of the through hole 411 until the first section 311 of the sleeve 31 abuts against the other side surface of the mounting portion 41 along the axial direction of the through hole 411. In this way, the two sleeves 31 are assembled to opposite sides along the axial direction of the through hole 411 of the mounting portion 41, and the assembly of the sleeve assembly 30 and the mounting portion 41 is realized.

[0063] The length of the second section 312 of the sleeve 31 refers to the distance between the end face of the first end 3110 of the first section 311 and the end face of the third end 3120 of the second section 312. After the two sleeves 31 are assembled, the end faces of the first ends 3110 of the two sleeves 31 can abut against the two side surfaces of the mounting portion 41 along the axial direction of the through hole 411. Since the distance L between the two side surfaces of the mounting portion 41 along the axial direction of the through hole 411 is greater than or equal to the sum L1+L2 of the lengths of the second sections 312 of the two sleeves 31, i.e., L≥L1+L2, the end faces of the third ends 3120 of the second sections 312 of the two sleeves 31 have a gap D after the two sleeves 31 are assembled. In some embodiments, the gap D is greater than 0 and less than 0.5 mm, i.e., 0

[0064] The battery device 100 of the embodiments of the present application can reduce the assembly process control requirement by assembling the two sleeves 31 to the opposite sides along the axial direction of the through hole 411 of the mounting portion 41, thereby reducing the installation difficulty of the sleeve assembly 30 during assembly, and improving the assembly efficiency. The distance between the two opposite surfaces of the mounting portion 41 along the axial direction of the through hole 411 is greater than or equal to the sum of the lengths of the second sections 312 of the two sleeves 31, so that there is a gap between the second sections 312 of the two sleeves 31 along the axial direction of the sleeve 31 away from the end surface of the first section 311 after assembly, which can reduce the interference between the two sleeves 31 and reduce the deformation and skew of the sleeve 31 after installation, thereby improving the perpendicularity and end surface profile of the sleeve 31 after installation, which is beneficial to the subsequent assembly of the battery device 100 and improves the installation accuracy of the battery device 100, and further improves the connection stability of the battery device 100 and the power device main body.

[0065] In some embodiments, referring to Figure 2 , the battery device 100 further comprises a box body 10 and a battery cell assembly 50, and the battery cell assembly 50 is accommodated in the box body 10.

[0066] The box body 10 can be the box body 10 described above for providing a containing space for the battery cell 20. The plurality of battery cells 20 are connected in series or parallel or mixed together to form the battery cell assembly 50, and the battery cell assembly 50 is accommodated in the box body 10.

[0067] In some embodiments, the box body 10 is provided with a plate body 40, and the sleeve assembly 30 is used to fix the box body 10 to the power device.

[0068] The plate body 40 can be a part of the frame of the box body 10, for example, the plate body 40 can be a side plate of the box body 10. In some embodiments, the mounting portion 41 is fixedly connected to the side plate of the box body 10 and located on the side of the side plate facing the outside of the box body 10. The side plate around the box body 10 is provided with a mounting portion 41, so that the plurality of mounting portions 41 are distributed around the box body 10.

[0069] In this way, the mounting portion 41 is arranged on the box body 10, which facilitates the fixed connection of the box body 10 and the power device main body, reduces the shaking of the box body 10, and improves the reliability and stability of the connection between the battery device 100 and the power device main body.

[0070] In some embodiments, referring to Figure 8 , Figure 8 The structure of the battery cell assembly 50 in some embodiments of the present application is shown in the structural schematic diagram. The battery cell assembly 50 is provided with a plate body 40, and the sleeve assembly 30 is used to fix the battery cell assembly 50 in the box body 10.

[0071] The battery cell assembly 50 can be a battery module composed of a plurality of battery cells 20 in series or in parallel or in a hybrid combination. In the battery cell assembly 50, the plurality of battery cells 20 are arranged in sequence; the battery cell assembly 50 further comprises two end plates 51 and two plate bodies 40, the two end plates 51 are respectively arranged at both ends of the plurality of battery cells 20 in the arrangement direction, and the two plate bodies 40 are respectively arranged on both sides of the plurality of battery cells 20 perpendicular to the arrangement direction, and each plate body 40 is respectively connected to the two end plates 51 to fix a column of battery cells 20. In the battery device 100, the battery cell assembly 50 can be multiple, and the multiple battery cell assemblies 50 can be in series or in parallel or in a hybrid combination. The mounting portion 41 is fixedly connected to the plate body 40, and the battery cell assembly 50 can be fixedly connected to the box body 10 through the sleeve assembly 30 mounted on the mounting portion 41, so as to fix the battery cell assembly 50 inside the box body 10, which can reduce the shaking of the battery cell assembly 50 inside the box body 10. In some embodiments, the battery cell assembly 50 can also be fixedly connected to the power device body and the box body 10 through the sleeve assembly 30 mounted on the mounting portion 41, which can improve the reliability and stability of the connection between the battery device 100 and the power device body.

[0072] In this way, the mounting portion 41 is arranged on the battery cell assembly 50, which facilitates the fixed connection of the battery cell assembly 50 with the box body 10 and the power device body, reduces the shaking of the battery cell assembly 50, and is conducive to improving the reliability and stability of the connection between the battery device 100 and the power device body.

[0073] In some embodiments, referring to Figure 4 and Figure 5 The sleeve 31 further comprises an adhesive layer 313 arranged between the end face of the first end 3110 of the first section 311 and the surface of the mounting portion 41 around the through hole 411, and the adhesive layer 313 adhesively connects the first section 311 and the mounting portion 41.

[0074] The adhesive layer 313 can be formed after the adhesive is cured. For example, the adhesive can be, but is not limited to, a structural adhesive. The adhesive is coated on the end surface of the first end 3110 of the first section 311 and / or the surface of the mounting portion 41 around the through hole 411 by a coating process. After the sleeve 31 is assembled with the mounting portion 41, the adhesive is clamped between the end surface of the first end 3110 of the first section 311 and the surface of the mounting portion 41 around the through hole 411. After the adhesive is cured, the first section 311 and the mounting portion 41 are fixedly bonded, thereby forming the adhesive layer 313. The adhesive layer 313 can also be an adhesive tape or film made of an adhesive material. For example, the adhesive tape can be, but is not limited to, a double-sided adhesive tape. The double-sided adhesive tape is attached to the end surface of the first end 3110 of the first section 311 and / or the surface of the mounting portion 41 around the through hole 411. After the sleeve 31 is assembled with the mounting portion 41, the double-sided adhesive tape is clamped between the end surface of the first end 3110 of the first section 311 along the sleeve 31 and the surface of the mounting portion 41 around the through hole 411, thereby fixedly bonding the first section 311 and the mounting portion 41. The specific forming mode of the adhesive layer 313 is not limited in the embodiments of the present application.

[0075] The adhesive layer 313 is arranged to fixedly bond the first section 311 and the mounting portion 41, which can improve the mechanical strength and the connection firmness of the sleeve 31 and the mounting portion 41, and can reduce the installation difficulty, improve the assembly efficiency, and reduce the cost.

[0076] In some embodiments, referring to Figures 4 to 7 and Figure 9 , Figure 9 FIG. 8 shows a structural schematic diagram of another view of the sleeve 31 in the embodiments of the present application. The end surface of the first end 3110 of the first section 311 is provided with a recess 3111, and at least part of the adhesive layer 313 is located in the recess 3111.

[0077] The end surface of the first end 3110 of the first section 311 is provided with a convex adhesive surface 3112 outside the recessed portion 3111. After the sleeve 31 is assembled with the mounting portion 41, the convex adhesive surface 3112 can be arranged in close contact with the surface of the mounting portion 41 around the through hole 411. In some embodiments, the recessed portion 3111 is arranged to extend around the second section 312. Since the second section 312 is generally in a columnar structure, the recessed portion 3111 forms an annular groove, for example, a circular annular groove, and the convex adhesive surface 3112 corresponds to an annular convex surface. The first section 311 of the sleeve 31 is fixed to the surface of the mounting portion 41 by adhesive. The recessed portion 3111 can form a glue groove structure for accommodating glue or adhesive material, reducing the overflow of glue or adhesive material outside the sleeve 31. When glue or adhesive material is applied to the end surface of the first end 3110 of the first section 311, at least part of the glue or adhesive material can be accommodated in the recessed portion 3111. When the volume of glue or adhesive material is greater than the volume of the recessed portion 3111, the excess glue or adhesive material can overflow onto the convex adhesive surface 3112, thereby increasing the adhesive area and improving the adhesive connection strength.

[0078] By providing the recessed portion 3111, the limiting effect of the recessed portion 3111 can be used to stably connect the adhesive layer 313 between the end surface of the first end 3110 of the first section 311 of the sleeve 31 and the surface of the mounting portion 41, and can also increase the adhesive area and improve the adhesive connection strength, thereby improving the connection strength and connection firmness of the sleeve 31 and the mounting portion 41.

[0079] In some embodiments, referring to Figure 7 and Figure 9 , along the radial direction of the sleeve 31, the recessed portion 3111 is arranged on the side of the first end 3110 of the first section 311 close to the second section 312.

[0080] Along the radial direction of the sleeve 31, the recessed portion 3111 can be arranged on the inner ring side of the end surface of the first end 3110 of the first section 311, and the convex adhesive surface 3112 is located on the outer ring side of the end surface of the first end 3110. At this time, glue can be applied at the recessed portion 3111, and the glue or adhesive material is accommodated in the recessed portion 3111, and the recessed portion 3111 forms a concave glue application surface; the excess glue or adhesive material can overflow onto the convex adhesive surface 3112, and the convex adhesive surface 3112 forms a convex overflow glue surface.

[0081] By arranging the recessed portion 3111 on the inner ring side of the end surface of the first end 3110 of the first section 311, and arranging the convex adhesive surface 3112 around the outer periphery of the recessed portion 3111, the convex adhesive surface 3112 is in close contact with the surface of the mounting portion 41, which can control the thickness of the glue application, improve the consistency of the thickness of the adhesive layer 313, and is beneficial to improve the assembly precision of the sleeve 31, thereby improving the perpendicularity and end surface profile after the sleeve 31 is installed.

[0082] In some embodiments, referring to Figure 10 , Figure 10 A structural schematic diagram of the sleeve 31 in some other embodiments of the present application is shown. The recess 3111 is arranged on the side of the first end 3110 of the first section 311 away from the second section 312 along the radial direction of the sleeve 31.

[0083] The recess 3111 can be arranged on the outer ring side of the end face of the first end 3110 of the first section 311 along the radial direction of the sleeve 31, and the convex adhesive surface 3112 is located on the inner ring side of the end face of the first end 3110. At this time, the convex adhesive surface 3112 can be glued, and the convex adhesive surface 3112 forms a convex gluing surface. The excess glue or adhesive material can overflow into the recess 3111, and the recess 3111 forms a recessed overflow gluing surface.

[0084] By arranging the recess 3111 on the outer ring side of the end face of the first end 3110, the overflow of excess glue or adhesive material is facilitated, which is conducive to the adhesion of the convex adhesive surface 3112 to the surface of the mounting portion 41, can improve the consistency of the thickness of the adhesive layer 313, and further improve the assembly accuracy of the sleeve 31, and improve the perpendicularity and end face profile after the sleeve 31 is installed.

[0085] In some embodiments, referring to Figure 10 , the first end 3110 of the first section 311 is provided with at least two positioning protrusions 314, the positioning protrusions 314 protrude from the end face of the first end 3110, and the at least two positioning protrusions 314 are arranged in a ring around the second section 312.

[0086] The number of positioning protrusions 314 is at least two, for example, two, three, four, five, six, etc. The shape of the positioning protrusions 314 is not specifically limited here, for example, the positioning protrusions 314 can be columnar, hemispherical, conical, sheet-shaped, etc. In some embodiments, the positioning protrusions 314 are integrally injection molded with the first section 311. It can be understood that since the positioning protrusions 314 protrude from the end face of the first end 3110 of the first section 311, when the sleeve 31 is assembled with the mounting portion 41, the end portions of the at least two positioning protrusions 314 away from the first section 311 abut against the surface of the mounting portion 41. At this time, the at least two positioning protrusions 314 form a gap between the end face of the first end 3110 of the first section 311 and the surface of the mounting portion 41, and the adhesive layer 313 is located in the gap. It can be understood that the size of the gap is the thickness of the adhesive layer 313. By controlling the height of the positioning protrusions 314 protruding from the end face of the first end 3110 of the first section 311, the size of the gap between the end face of the first end 3110 of the first section 311 and the surface of the mounting portion 41 can be controlled, that is, the thickness of the adhesive layer 313 is controlled. In some embodiments, as Figure 10As shown in the figure, along the radial direction of the sleeve 31, the recess 3111 is arranged on the outer ring of the end surface of the first end 3110 of the first section 311, the positioning protrusion 314 is located in the recess 3111, and the positioning protrusion 314 protrudes from the convex bonding surface 3112. In this way, the amount of glue overflow can be controlled, the thickness control accuracy of the glue layer can be improved, the amount of glue used can be saved, and the cost can be reduced.

[0087] By arranging at least two positioning protrusions 314 to control the thickness of the glue layer 313, the control accuracy of the thickness of the glue layer 313 can be improved, the thickness consistency of the glue layer 313 can be improved, the assembly accuracy of the sleeve 31 can be improved, and the perpendicularity and the profile of the axial relative two side surfaces of the sleeve 31 after installation can be improved.

[0088] In some embodiments, referring to Figure 10 and Figure 11 , Figure 11 A structure diagram of the mounting portion 41 in some other embodiments of the present application is shown. At least two positioning recesses 412 are arranged in the recess on the surface of the mounting portion 41 around the through hole 411. The at least two positioning recesses 412 are arranged one by one corresponding to the at least two positioning protrusions 314, and the positioning protrusion 314 and the positioning recess 412 can be connected in cooperation.

[0089] After the protruding positioning protrusion 314 is arranged on the sleeve 31, the recessed positioning recess 412 can be synchronously arranged on the surface of the mounting portion 41. For example, the positioning protrusion 314 can be a positioning column, and the positioning recess 412 can be a positioning groove. After the sleeve 31 and the mounting portion 41 are assembled in place, the end of the positioning protrusion 314 abuts against the inside of the positioning recess 412.

[0090] By arranging the positioning recess 412 to be connected in cooperation with the positioning protrusion 314, the assembly accuracy of the sleeve 31 and the mounting portion 41 can be further improved, and the relative rotation of the sleeve 31 and the mounting portion 41 can be limited, thereby improving the connection stability of the sleeve 31 and the mounting portion 41.

[0091] In some embodiments, referring to Figure 10 and Figure 11 , a limiting structure is arranged on the first end 3110 of the first section 311 and on the surface of the mounting portion 41 around the through hole 411, and the limiting structure is used to limit the rotation of the sleeve 31 relative to the mounting portion 41.

[0092] For example, the limiting structure can be but is not limited to a protruding structure and a hole and groove structure that can be connected in cooperation. One of the protruding structure and the hole and groove structure is arranged on the first end 3110 of the first section 311, and the other is arranged on the surface of the mounting portion 41 around the through hole 411, so that the relative rotation of the sleeve 31 and the mounting portion 41 is limited by the cooperation of the protruding structure and the hole and groove structure. In some embodiments, as Figure 10and Figure 11 As shown in FIG. 3, the limiting structure can include a positioning protrusion provided at the first end 3110 of the first section 311 and a positioning recess provided on the surface of the mounting portion 41.

[0093] By providing the limiting structure to limit the rotation of the sleeve 31 relative to the mounting portion 41, the connection stability of the sleeve 31 and the mounting portion 41 can be improved, and thus the connection stability of the battery device 100 and the power consumption device body can be improved.

[0094] In some embodiments, the second section 312 is in interference fit with the through hole 411.

[0095] The diameter of the second section 312 is not less than the hole diameter of the through hole 411. When the sleeve 31 is connected with the mounting portion 41, the second section 312 of the sleeve 31 is inserted into the through hole 411, and the second section 312 is in interference fit with the through hole 411, which can reduce the probability of the second section 312 of the sleeve 31 moving along the radial direction of the through hole 411, thereby playing a radial limiting role on the sleeve 31, and can fix the sleeve 31 on the mounting portion 41, limiting the sleeve 31 from being separated from the mounting portion 41, thereby realizing the connection of the sleeve 31 and the mounting portion 41.

[0096] By providing the second section 312 in interference fit with the through hole 411, the sleeve 31 can be fixed on the mounting portion 41, reducing the shaking of the sleeve 31, and the connection stability of the sleeve 31 and the mounting portion 41 can be improved. Moreover, the sleeve 31 is in interference fit at one place, which can reduce the control requirements of the assembly process, thereby reducing the installation difficulty of the sleeve assembly 30 during assembly.

[0097] In some embodiments, referring to Figure 7 and Figure 9 The second section 312 includes an interference section 3121 and a guide section 3122. The interference section 3121 is connected to the first section 311, and the guide section 3122 is connected to one end of the interference section 3121 away from the first section 311 along the axial direction of the sleeve 31. The interference section 3121 is in interference fit with the through hole 411, and the outer diameter of the guide section 3122 is smaller than that of the interference section 3121, and the outer diameter of the guide section 3122 gradually decreases away from the interference section 3121 along the axial direction of the sleeve 31.

[0098] Since the outer diameter of the guide section 3122 gradually decreases away from the interference section 3121 along the axial direction of the sleeve 31, the guide section 3122 forms a conical guide slope. In some embodiments, the inclination angle of the guide section 3122 relative to the interference section 3121 can range from 10° to 30°, for example, the inclination angle of the guide section 3122 can be 10°. During assembly, the sleeve 31 is assembled into the through hole 411 of the mounting portion 41 through the guide section 3122, and the interference section 3121 of the sleeve 31 is in interference fit with the inner wall of the through hole 411.

[0099] By arranging the guide section 3122, the resistance of the sleeve 31 to press the interference section 3121 of the second section 312 into the through hole 411 of the mounting portion 41 can be reduced, the interference fit between the second section 312 and the through hole 411 can be facilitated, the insertion of the second section 312 into the through hole 411 can be smooth, the installation of the sleeve 31 can be facilitated, and the assembly efficiency can be improved.

[0100] In some embodiments, with reference to Figure 3 and Figure 10 the second section 312 has a third end 3120 axially away from the first section 311 along the sleeve 31, and a chamfer 3123 is arranged on the end face of the third end 3120 away from the central axis of the sleeve 31.

[0101] For example, the angle range of the chamfer 3123 can be 30° to 45°. By arranging the chamfer 3123, the sleeve 31 can be facilitated to press into the through hole 411 of the mounting portion 41, the interference fit between the second section 312 and the through hole 411 can be facilitated, the insertion of the second section 312 into the through hole 411 can be smooth, the installation of the sleeve 31 can be facilitated, and the assembly efficiency can be improved.

[0102] According to some embodiments of the present application, the present application also provides a power consuming device, which comprises the battery device 100 of any of the above embodiments, and the battery device 100 is used to provide electric energy for the power consuming device.

[0103] The power consuming device can be the equipment or system of any of the above applications of the battery device 100. Since the power consuming device has the same technical effects as the above battery device 100, details are not repeated here.

[0104] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a plate body provided with a mounting portion, a through hole being formed in the mounting portion; a sleeve assembly comprising two sleeves, the two sleeves being respectively arranged at two axial ends of the through hole; the sleeve comprises a first section and a second section connected with each other, an outer diameter of the first section being larger than an outer diameter of the second section, the first section having a first end close to the second section along an axial direction of the sleeve, the first end abutting against a surface of the mounting portion around the through hole, the second section being arranged in the through hole; wherein a distance between two side surfaces of the mounting portion arranged oppositely along the axial direction of the through hole is greater than or equal to a sum of lengths of the second sections of the two sleeves.

2. The battery device according to claim 1, characterized by The battery device further comprises a box body and a battery cell assembly, the battery cell assembly being accommodated in the box body; wherein the box body is provided with the plate body, the sleeve assembly being used for fixing the box body to an electric device; or the battery cell assembly is provided with the plate body, the sleeve assembly being used for fixing the battery cell assembly in the box body.

3. The battery device of claim 1, wherein The sleeve further comprises a glue layer, the glue layer being arranged between an end surface of the first end of the first section and the surface of the mounting portion around the through hole, the glue layer being used for adhesively connecting the first section and the mounting portion.

4. The battery device of claim 3, wherein An end surface of the first end of the first section is provided with a recess, at least part of the glue layer being located in the recess.

5. The battery device of claim 4, wherein, Along a radial direction of the sleeve, the recess is arranged on a side of the first end of the first section close to the second section; or, along the radial direction of the sleeve, the recess is arranged on a side of the first end of the first section away from the second section.

6. The battery device of claim 3, wherein The first end of the first section is provided with at least two positioning protrusions, the positioning protrusions protruding from the end surface of the first end, the at least two positioning protrusions being arranged around the second section at intervals.

7. The battery device of claim 6, wherein The surface of the mounting portion around the through hole is recessed with at least two positioning recesses, the at least two positioning recesses being arranged in one-to-one correspondence with the at least two positioning protrusions, the positioning protrusions and the positioning recesses being capable of being connected in cooperation.

8. The battery device of claim 1, wherein The first end of the first section and the surface of the mounting portion around the through hole are both provided with a limiting structure, the limiting structure being used for limiting rotation of the sleeve relative to the mounting portion.

9. The battery device according to any one of claims 1 to 8, characterized by, The second section is in interference fit with the through hole.

10. The battery device of claim 9, wherein, The second section has a third end away from the first section along the axial direction of the sleeve, a side of an end surface of the third end away from a central axis of the sleeve being provided with a chamfer.

11. The battery device of claim 9, wherein, The second section comprises an interference section and a guide section, the interference section being connected to the first section, the guide section being connected to an end of the interference section away from the first section along the axial direction of the sleeve, the interference section being in interference fit with the through hole, an outer diameter of the guide section being smaller than an outer diameter of the interference section, and the outer diameter of the guide section gradually decreasing away from the interference section along the axial direction of the sleeve.

12. An electrical device, comprising: The electric device comprises the battery device as claimed in any one of claims 1 to 11, the battery device being used for providing electric energy.

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