Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a battery monomer, a box body and a supporting frame, the box body comprises a first box body part and a second box body part which are mutually covered, and the first box body part and the second box body part are enclosed to form an accommodating space for accommodating the battery monomers. The supporting frame is fixed to the end face, facing the first box body part, of the second box body part and arranged in the circumferential direction of the second box body part. Wherein the first box body part and the supporting frame are mutually clamped, and an annular sealing cavity is formed between the supporting frame and the first box body part. The supporting frame is provided with an inflation hole communicating with the sealing cavity, and the inflation hole is used for inflating the sealing cavity to enable the sealing cavity to expand so as to enhance the sealing connection strength between the supporting frame and the first box body part. According to the technical scheme, the air tightness of the box body of the battery device can be improved, and the production efficiency of the battery device is improved.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are used more and more widely, such as in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric tools, etc.

[0003] Currently, battery packs contain a housing to protect the battery cells. The housing consists of two parts, upper and lower, that cover each other to form a housing. The two parts of the housing need to be sealed, but existing housing sealing structures lack sufficient sealing performance and are not removable. Therefore, improvements are needed to this structure. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can improve the airtightness of the battery device box and increase the production efficiency of the battery device.

[0005] In the first aspect, the present application provides a battery device comprising a battery cell, a box body and a support frame. The box body comprises a first box body portion and a second box body portion that cover each other, and the first box body portion and the second box body portion enclose to form a storage space for accommodating the battery cell. The support frame is fixed to the end face of the second box body portion facing the first box body portion, and is arranged along the circumference of the second box body portion. The first box body portion and the support frame are engaged with each other, and an annular sealed cavity is formed between the support frame and the first box body portion. An inflation hole connected to the sealed cavity is provided on the support frame, and the inflation hole is used to inflate the sealed cavity to expand the sealed cavity, so as to enhance the sealing connection strength between the support frame and the first box body portion.

[0006] In the technical solution of the embodiment of the present application, the box body provides a sealed and stable environment for the battery cell, reducing the damage to the battery cell caused by external impurities, water vapor, etc. The support frame is fixedly connected to the second box body part, and the support frame is added on the basis of not changing the original box body structure, thereby improving the sealing of the connection between the first box body part and the second box body part. The support frame is clamped to the inner side of the first box body part, and the first box body part and the second box body part can be connected in a detachable manner, which is convenient for the maintenance and replacement of the box body. A sealed cavity is provided between the support frame and the first box body part, and is circumferentially arranged around the first box body part. The sealed cavity is expanded by inflation, thereby increasing the connection strength between the support frame and the first box body part, thereby improving the sealing performance between the first box body part and the support frame. Furthermore, the above structure can replace the structure of the sealant and the connecting bolts, effectively improving the overall sealing performance of the box body.

[0007] In some embodiments, an annular groove is provided on the surface of the support frame facing the first housing portion, and an annular protrusion is provided on a corresponding position of the first housing portion facing the support frame. The annular protrusion cooperates with the annular groove to securely connect the support frame to the first housing portion. In the above structure, the provision of the annular groove and the annular protrusion improves the efficiency of the connection between the support frame and the first housing portion, and enhances sealing performance.

[0008] In some embodiments, the first box body portion includes a cover plate, an elastic sealing ring, and a reinforcement ring. The cover plate is arranged opposite to the second box body portion, the elastic sealing ring is continuously arranged around the periphery of the cover plate, and the annular protrusion is arranged on the side of the elastic sealing ring facing the support frame. The reinforcement ring is embedded in the annular protrusion and extends continuously along the circumference of the elastic sealing ring. In the above structure, the elastic sealing ring has a certain deformation performance and can expand and increase strength during inflation, thereby improving the sealing performance. The reinforcement ring is arranged in the annular protrusion to improve the structural performance of the annular protrusion, thereby improving the sealing performance between the annular protrusion and the annular groove.

[0009] In some embodiments, the first housing portion and the second housing portion are arranged opposite each other along a first direction. The elastic sealing ring is formed with a first annular protrusion and a second annular protrusion spaced apart along the first direction. The first annular protrusion is arranged adjacent to the cover plate, and the second annular protrusion is arranged adjacent to the second housing portion. The mating surface of the support frame is correspondingly provided with a first annular groove and a second annular groove. The first annular protrusion and the first annular groove, and the second annular protrusion and the second annular groove, respectively, form a double sealing mating structure. In the above structure, the provision of two annular protrusions and the corresponding two annular grooves further enhances the connection strength and sealing performance between the support frame and the first housing portion.

[0010] In some embodiments, the reinforcement ring includes a first reinforcement ring and a second reinforcement ring, wherein the first reinforcement ring is embedded in the first annular protrusion, and the second reinforcement ring is embedded in the second annular protrusion. In the above structure, by providing multiple reinforcement rings, the structural strength of the annular protrusion is improved, and the sealing performance between the first and second box parts is improved.

[0011] In some embodiments, the cover plate and the elastic sealing ring are integrally formed. In the above structure, the cover plate and the elastic sealing ring are made of the same material and through the same manufacturing process, which can improve manufacturing efficiency and enhance connection strength.

[0012] In some embodiments, the first housing portion further includes an extension plate extending vertically along the periphery of the cover plate to form a transition structure connecting the cover plate and the elastic sealing ring. The elastic sealing ring is fixedly connected to the end of the extension plate. In this structure, the extension plate increases the height of the first housing portion, thereby increasing the space inside the housing and improving the energy density of the battery device.

[0013] In some embodiments, the end plate of the extension plate is bent toward a side away from the accommodation space to form a bent plate, and the elastic sealing ring is connected to the bent plate. In the above structure, the bent plate increases the contact area between the first box body and the support frame, thereby improving the sealing performance between the first box body and the support frame.

[0014] In some embodiments, a metal support mesh is embedded within the elastic sealing ring, and the metal support mesh extends continuously along the circumference of the elastic sealing ring. In the above structure, the metal support mesh improves the structural performance of the elastic sealing ring while not affecting the elastic sealing ring's inflation and deformation.

[0015] In some embodiments, the metal support mesh includes at least two mesh reinforcement layers, each arranged parallel and spaced apart along the thickness of the elastic sealing ring. Adjacent mesh reinforcement layers are secured to each other by connecting ribs, forming a multi-layer composite support structure. This structure, with multiple mesh reinforcement layers, enhances the structural strength of the elastic sealing ring. The connecting ribs connect the multiple mesh reinforcement layers, reducing the risk of displacement.

[0016] In some embodiments, the support frame includes a first side panel, a second side panel, a top panel and a bottom panel. The first side panel is arranged opposite to the elastic sealing ring, the second side panel is arranged opposite to the first side panel, and the second side panel is arranged between the first side panel and the elastic sealing ring. The top panel is connected between the first side panel and the second side panel, and the top panel is arranged on the side of the first side panel facing the cover panel. The bottom panel is connected between the first side panel and the second side panel and is arranged opposite to the top panel, and the bottom panel is fixedly connected to the second box body portion by structural adhesive. Wherein, the first side panel, the top panel, the second side panel and the bottom panel together enclose a closed air guide cavity. In the above structure, the first side panel, the top panel, the second side panel and the bottom panel are interconnected and form a sealed air guide cavity, which can enhance the introduction of gas into the sealed cavity. The second side panel is connected to the second box body portion by structural adhesive, which enhances the connection stability between the support frame and the box body.

[0017] In some embodiments, the second side plate extends toward the second box body portion to form an extension plate, and the extension plate protrudes from the side surface of the elastic sealing ring toward the second box body portion. The inflation hole is provided on the extension plate, and a sealing plug is also provided on the inflation hole. A vent is provided on the second side plate, and the vent connects the air guide cavity with the sealing cavity. In the above structure, the height of the support frame is extended by providing the extension plate, the internal space of the box body is increased, and the available space of the battery cell is increased. In addition, the extension plate extends out of the lower side of the elastic sealing ring, which can facilitate the connection between the inflation hole and the air guide cavity of the support frame for inflation. Compared with the inflation hole being provided on the elastic sealing member, the inflation hole being provided on the support frame can reduce the risk of deformation of the inflation hole, thereby improving the sealing performance of the box body.

[0018] In some embodiments, the top plate extends toward the elastic sealing ring to form an annular first clamping portion. The first clamping portion protrudes from the surface of the second side plate facing the elastic sealing ring and abuts the bent plate. A first annular protrusion is provided on the surface of the second side plate facing the elastic sealing ring. A first annular groove is formed between the first protrusion and the first clamping portion. In the above structure, the provision of the first clamping portion increases the connection area with the bent plate, thereby improving sealing performance. Furthermore, the first protrusion and the first clamping portion form an annular groove, which cooperates with the annular protrusion to improve sealing performance.

[0019] In some embodiments, the second side plate protrudes toward the elastic sealing ring to form an annular second clamping portion. A second annular protrusion is provided on the side of the second side plate facing the elastic sealing ring, with a second annular groove formed between the second protrusion and the second clamping portion. In the above structure, the second clamping portion and the first protrusion form an annular groove, thereby improving the sealing performance of the box.

[0020] In some embodiments, a limiting protrusion is provided on the surface of the first engaging portion facing the bent plate, and a corresponding limiting groove is provided on the surface of the bent plate facing the first engaging portion. The limiting protrusion engages within the limiting groove to limit movement of the first housing portion relative to the support frame. In the above structure, the limiting protrusion engages with the limiting groove, limiting movement of the first engaging portion relative to the bent plate and improving the stability of the connection between the first housing portion and the support frame.

[0021] In some embodiments, a surface of the second engaging portion facing the elastic sealing ring is provided with an engaging protrusion, which abuts against a side of the elastic sealing ring facing away from the sealing cavity. In the above structure, the provision of the engaging protrusion limits the movement of the elastic sealing ring relative to the support frame, thereby improving the stability of the connection between the first housing portion and the support frame.

[0022] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiment, and the battery device is used to provide electrical energy.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0025] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0026] Figure 2A schematic structural diagram of a battery device provided in some embodiments of the present application;

[0027] Figure 3 An exploded schematic diagram of a box provided in some embodiments of the present application;

[0028] Figure 4 A schematic structural diagram of a battery device provided in some other embodiments of the present application;

[0029] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A;

[0030] Figure 6 A schematic diagram of the structure of a support frame provided in some embodiments of the present application;

[0031] Figure 7 A schematic diagram of the structure of a support frame provided in some other embodiments of the present application;

[0032] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of part B;

[0033] Figure 9 A schematic structural diagram of a first box body provided in some embodiments of the present application;

[0034] Figure 10 A schematic structural diagram of a first box portion provided in some other embodiments of the present application;

[0035] Figure 11 for Figure 10 Schematic diagram of the enlarged structure of part C.

[0036] DETAILED DESCRIPTION OF THE REFERENCE NUMERALS

[0037] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor; 5. Housing; 5a. First housing portion; 5b. Second housing portion; 501. Annular protrusion; 502. Cover plate; 503. Elastic sealing ring; 504. Reinforcement ring; 505. First annular protrusion; 506. Second annular protrusion; 507. First reinforcement ring; 508. Second reinforcement ring; 509. Extension plate; 510. Bent plate; 511. Restriction groove; 7. Support frame; 701. Sealing chamber; 702 , inflation hole; 703, annular groove; 704, first side plate; 705, second side plate; 706, top plate; 707, bottom plate; 708, air guide cavity; 709, extension plate; 710, ventilation hole; 711, first clamping part; 712, first protrusion; 713, first annular groove; 714, second clamping part; 715, second protrusion; 716, second annular groove; 717, limiting protrusion; 718, clamping protrusion; 720, sealing plug; X, first direction. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0046] In this application, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0047] 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.

[0048] In the embodiments of this application, "parallel" includes not only absolute parallelism but also approximately parallelism as commonly understood in engineering practice. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximately perpendicularity as commonly understood in engineering practice. For example, if the angle between two directions is 85°-95°, they are considered perpendicular; if the angle between two directions is 0°-5°, they are considered parallel.

[0049] The term "plurality" used in this application refers to two or more (including two).

[0050] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0051] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0052] A battery cell typically includes an electrode assembly. This assembly consists of a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing the active ions to pass through.

[0053] In some embodiments, a battery cell may include an outer shell. This outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film. In some embodiments, the outer shell may be sealed or non-sealed. For example, in a non-sealed outer shell, the outer shell protects the electrode assembly and includes a sealing bag between the outer shell and the electrode assembly, which encapsulates the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. In a sealed outer shell, the outer shell encapsulates the electrode assembly, electrolyte, and other components.

[0054] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in this application.

[0055] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0056] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collecting member. The electrode terminal may be provided on an end cap or on the housing.

[0057] In the related art, the sealing of the box body is achieved by using sealing foam disposed between the first box body part and the second box body part, and then the sealing is constrained by forward bolts. Among them, the sealing effects of the bolt connection area and the non-bolt connection area are different, resulting in uneven effectiveness of the circumferential sealing of the entire first box body part and insufficient redundancy for sealing failure. In addition, bolt fastening is adopted, and the number of bolts on the entire locking surface generally reaches 60-80, and the installation operation is complicated. Furthermore, the box body needs to be opened and the insert nut installed, and then the hole position needs to be adjusted. The bolt fastening also needs to meet the tightening torque and other requirements. The overall parts and processes are cumbersome, which is not conducive to the rapid integration of modularization and the disassembly and maintenance of the battery pack.

[0058] In view of this, the present application provides a battery device, in which a support frame is provided, and the support frame is fixedly connected to the second box body part. The support frame is added on the basis of not changing the original box body structure, thereby improving the sealing performance of the connection between the first box body part and the second box body part. The support frame is clamped to the inner side of the first box body part, and the first box body part and the second box body part can be connected in a detachable connection manner, which is convenient for the installation, disassembly and maintenance of the box body. A sealing cavity is provided between the support frame and the first box body part, and is circumferentially arranged around the first box body part. The sealing cavity is expanded by inflation, thereby increasing the connection strength between the support frame and the first box body part, and improving the sealing performance between the first box body part and the support frame. Furthermore, the above structure can replace the structure of the sealant and the connecting bolts, and effectively improve the overall sealing performance of the box body.

[0059] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0060] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0061] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with a cable tie.

[0062] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0063] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0064] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0065] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are buckled together to form a closed space inside the box body to accommodate the battery cell assembly.

[0066] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0067] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0068] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0069] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0070] Figure 1 A schematic structural diagram of a vehicle provided for some embodiments of the present application.

[0071] As shown in FIG1 , a battery device 2 is provided inside a vehicle 1 , and the battery device 2 can be provided at the bottom, head, or tail of the vehicle 1 . The battery device 2 can be used to power the vehicle 1 , for example, the battery device 2 can serve as an operating power source for the vehicle 1 .

[0072] The vehicle 1 may further include a controller 3 and a motor 4 . The controller 3 is used to control the battery device 2 to supply power to the motor 4 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1 .

[0073] In some embodiments of the present application, the battery device 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0074] Figure 2 Schematic diagram of the explosion of the battery provided in some embodiments of the present application. Figure 2 As shown, the battery device 2 includes a housing 5 and a battery cell, wherein the battery cell is accommodated in the housing 5. The battery cell may be the smallest unit constituting a battery.

[0075] The housing 5 is used to house the battery cells and can have various structures. In some embodiments, the housing 5 may include a first housing portion 5a and a second housing portion 5b. The first housing portion 5a and the second housing portion 5b overlap each other, and together they define a storage space for the battery cells. The second housing portion 5b may be a hollow structure with one end open. The first housing portion 5a is a plate-like structure, and the first housing portion 5a overlaps the open side of the second housing portion 5b to form the housing 5 with the storage space. Alternatively, both the first housing portion 5a and the second housing portion 5b may be hollow structures with one end open, and the open side of the first housing portion 5a overlaps the open side of the second housing portion 5b to form the housing 5 with the storage space. Of course, the first housing portion 5a and the second housing portion 5b may have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0076] In the battery device 2 , there can be one or more battery cells. If there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells are connected in both series and parallel.

[0077] Multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells can be accommodated in the box 5; of course, multiple battery cells can also be first connected in series, in parallel, or in a mixed connection to form a battery module, and then the multiple battery modules can be connected in series, in parallel, or in a mixed connection to form a whole and accommodated in the box 5.

[0078] Please refer to Figures 2 to 5 , Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of the present application. Figure 3 An exploded schematic diagram of a box provided in some embodiments of the present application, Figure 4 This is a schematic diagram of the structure of a battery device provided in some other embodiments of the present application. Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A.

[0079] As shown in the figure, the battery device 2 provided in the embodiment of the present application includes a battery cell, a box body 5 and a support frame 7. The box body 5 includes a first box body 5 portion and a second box body 5 portion that cover each other, and the first box body 5 portion and the second box body 5 portion enclose to form a storage space for accommodating the battery cell. The support frame 7 is fixed to the end face of the second box body 5 portion facing the first box body 5 portion, and is arranged along the circumference of the second box body 5 portion. Among them, the first box body 5 portion and the support frame 7 are mutually engaged, and an annular sealed cavity 701 is formed between the support frame 7 and the first box body 5 portion. An inflation hole 702 connected to the sealed cavity 701 is provided on the support frame 7. The inflation hole 702 is used to inflate the sealed cavity 701 to expand the sealed cavity 701, so as to enhance the sealing connection strength between the support frame 7 and the first box body 5 portion.

[0080] The support frame 7 is fixed to the end surface of the second housing 5 that faces the first housing 5 and is arranged along the circumference of the second housing 5. The support frame 7 primarily serves as a connecting and transitional component between the first and second housings 5, while also providing the structural foundation for the formation of a sealed cavity 701. The sealed cavity 701 is formed by the interlocking engagement of the support frame 7 and the first housing 5, forming an annular structure. The sealed cavity 701 is a key component for achieving a seal, and is inflated to enhance the sealing effect.

[0081] The support frame 7 is an overall, complete ring-shaped structure, directly secured to the end face of the second housing 5 facing the first housing 5. This simple structural form allows for uniform arrangement around the circumference of the second housing 5. When engaged with the first housing 5, a relatively regular annular sealed cavity 701 is formed. Alternatively, the support frame 7 can be divided into several sections that match the perimeter of the second housing 5. Each section is independently manufactured and then secured to the end face of the second housing 5 by splicing. This splicing method can include snap-fitting, bolting, and other methods.

[0082] A groove is provided on the surface of the support frame 7 that contacts the first box body 5 , and the shape of the groove can be rectangular, semicircular, etc. When the first box body 5 is engaged with the support frame 7 , the groove and the first box body 5 form a part of the sealed cavity 701 .

[0083] The support frame 7 can be manufactured from a material with a certain structural strength, such as aluminum alloy or stainless steel. Metal materials have high strength and rigidity, and can withstand large external forces without deformation, thereby ensuring the stability of the connection between the support frame 7 and the first housing 5 and maintaining the sealing effect of the sealed cavity 701. Furthermore, the above-mentioned metal materials have excellent high and low temperature resistance, can maintain stable structural and sealing properties over a wide temperature range, and are suitable for various harsh working environments.

[0084] Optionally, to reduce material density and increase the energy density of the battery device 2 , the support frame 7 can be made of an organic composite material, such as glass fiber reinforced plastic (GFRP) or carbon fiber reinforced plastic (CFRP). Composite materials combine the advantages of plastic and reinforced materials, offering high strength, rigidity, and temperature resistance while being relatively lightweight, thus meeting the performance and weight requirements of the battery device 2 for the support frame 7 .

[0085] The inflation hole 702 is provided on the support frame 7 and communicates with the sealing cavity 701 , which can facilitate the passage of inflation into the sealing cavity 701 . The inflation operation changes the state of the sealing cavity 701 , thereby affecting the sealing connection strength between the support frame 7 and the first box body 5 .

[0086] By providing a sealed cavity 701 and inflating it through the inflation holes 702, this design allows for closer contact between the support frame 7 and the first housing 5, effectively filling the small gap between them and significantly enhancing the sealing effect. This excellent sealing performance prevents external impurities such as moisture and dust from entering the interior of the housing 5, thereby avoiding damage to the battery cells and extending the service life of the battery device 2. It also prevents harmful gases generated by the battery cells from leaking into the external environment, ensuring safe use.

[0087] The support frame 7 is arranged circumferentially along the second housing 5 and engages with the first housing 5, forming a stable connection. The inflated sealed cavity 701 further strengthens the secure connection, making the entire battery assembly 2 more structurally stable, able to withstand certain external impacts and vibrations, ensuring the stable installation position of the battery cells within the housing 5 and reducing the risk of damage to the battery cells due to vibration and other factors.

[0088] The use of a snap-fit ​​connection and the provision of an inflation hole 702 for sealing make the installation of the battery device 2 relatively simple. During installation, the support frame 7 is first secured to the second housing 5, the first housing 5 is then snap-fitted to the support frame 7, and finally, the seal is completed by inflation through the inflation hole 702. This eliminates the need for complex sealing processes and large amounts of sealing materials. During maintenance, if the sealing component needs to be inspected or replaced, simply deflate the air through the inflation hole 702 to release the expansion of the sealed cavity 701, allowing the first housing 5 to be easily disassembled, reducing maintenance difficulty and cost.

[0089] This sealing structure can also adjust the amount of air inflated according to actual needs, thereby controlling the expansion of sealed cavity 701 to adapt to different working environments and sealing requirements. For example, in environments with high humidity or high sealing requirements, the amount of air inflated can be appropriately increased to allow sealed cavity 701 to expand more fully and improve the sealing effect. In contrast, in environments with relatively low sealing requirements, the amount of air inflated can be reduced to save energy and costs.

[0090] In the technical solution of the embodiment of the present application, the box body 5 provides a sealed and stable environment for the battery cell, reducing the damage to the battery cell caused by external impurities, water vapor, etc. The support frame 7 is fixedly connected to the second box body 5. The support frame 7 is added on the basis of not changing the structure of the original box body 5, thereby improving the sealing of the connection between the first box body 5 and the second box body 5. The support frame 7 is clamped to the inner side of the first box body 5, and the first box body 5 can be connected to the second box body 5 in a detachable connection, which is convenient for the maintenance and replacement of the box body 5. A sealed cavity 701 is provided between the support frame 7 and the first box body 5, and is circumferentially arranged around the first box body 5. The sealed cavity 701 is expanded by inflation, thereby increasing the connection strength between the support frame 7 and the first box body 5, thereby improving the sealing performance between the first box body 5 and the support frame 7. Furthermore, the above structure can replace the structure of sealant and connecting bolts, effectively improving the overall sealing performance of the box body 5.

[0091] like Figures 5 to 8 As shown, in some embodiments of the present application, an annular groove 703 is provided on the surface of the support frame 7 facing the first box body 5, and an annular protrusion 501 is provided at the corresponding position of the first box body 5 facing the support frame 7. The annular protrusion 501 is cooperated with the annular groove 703 to clamp the support frame 7 to the first box body 5.

[0092] When assembling the first housing 5 and the support frame 7, the annular protrusion 501 on the first housing 5 is aligned with the annular groove 703 on the support frame 7, and then a certain pressure is applied to make the annular protrusion 501 fit into the annular groove 703, thereby achieving a snap connection between the support frame 7 and the first housing 5. This snap connection forms a mutual constraint perpendicular to the snap connection direction, preventing the first housing 5 and the support frame 7 from relative displacement.

[0093] The clamping structure of the annular protrusion 501 and the annular groove 703 provides a reliable mechanical connection between the support frame 7 and the first box body 5. During the use of the battery device 2, it may be subjected to various external forces, such as vibration, collision, etc. This clamping method can effectively resist these external forces, prevent the first box body 5 from loosening or separating from the support frame 7, and ensure the structural integrity of the entire battery device 2. Since the annular protrusion 501 and the annular groove 703 are arranged along the circumference, the clamping force between them can be evenly distributed on the contact surface, avoiding structural damage caused by excessive local force. This uniform force characteristic enables the support frame 7 and the first box body 5 to work together better, improving the overall structural stability of the battery device 2.

[0094] The mating structure of the annular protrusion 501 and the annular groove 703 is simple and intuitive. Installation requires only aligning the protrusion with the groove and applying pressure to complete the engagement. This convenient and quick operation reduces installation difficulty and improves production efficiency, making it particularly suitable for large-scale production. When maintenance or replacement of a battery cell is required, the annular protrusion 501 and the annular groove 703 can be released using a tool or method, allowing the first housing 5 to be separated from the support frame 7. Once maintenance is complete, the connection can be reconnected, making the operation relatively simple and reducing maintenance costs and time.

[0095] In the above structure, by providing the annular groove 703 and the annular protrusion 501 , the connection efficiency between the support frame 7 and the first box body 5 is improved, and the sealing performance is also improved.

[0096] like Figures 9 to 11 As shown, in some embodiments of the present application, the first housing 5 includes a cover plate 502, an elastic sealing ring 503, and a reinforcement ring 504. The cover plate 502 is disposed opposite the second housing 5. The elastic sealing ring 503 is disposed continuously around the periphery of the cover plate 502. The annular protrusion 501 is disposed on the side of the elastic sealing ring 503 facing the support frame 7. The reinforcement ring 504 is embedded in the annular protrusion 501 and extends continuously along the circumference of the elastic sealing ring 503.

[0097] The cover plate 502, a primary component of the first housing 5, is positioned opposite the second housing 5 and forms part of the battery housing 5's enclosed structure. It protects the battery cells and, together with the second housing 5, forms a space for them. An elastic sealing ring 503 is continuously arranged around the periphery of the cover plate 502. Made of elastic material, it deforms to a certain degree when subjected to external forces, but partially or fully recovers its shape after the force is removed. An annular protrusion 501 is provided on the side of the elastic sealing ring 503 facing the support frame 7. This protrusion 501 engages with an annular groove 703 on the support frame 7 to provide a seal and connection. A reinforcement ring 504 is embedded within the annular protrusion 501 and extends continuously around the circumference of the elastic sealing ring 503. The reinforcement ring 504 is typically made of a material with high strength and rigidity, such as metal or high-strength plastic. It serves to reinforce the structural strength of the annular protrusion 501 and prevent it from excessive deformation or damage during engagement and force application.

[0098] The elastic sealing ring 503 is inherently elastic. When engaged with the annular groove 703 of the support frame 7, the annular protrusion 501 of the elastic sealing ring 503 can, due to inflation or its own elasticity, fit tightly against the inner wall of the groove, forming a good sealing interface and effectively preventing external impurities such as moisture and dust from entering the interior of the battery case 5. Furthermore, the presence of the reinforcement ring 504 prevents permanent deformation of the annular protrusion 501 during long-term use or when subjected to significant external forces, thereby ensuring a durable sealing effect.

[0099] The elastic properties of the elastic sealing ring 503 allow it to adapt to certain dimensional deviations and installation errors, maintaining good sealing performance under different operating conditions. For example, if the battery device 2 is subjected to vibration or temperature changes, causing the dimensions of the components to change, the elastic sealing ring 503 can compensate for these changes through its own elastic deformation, ensuring that the seal does not fail.

[0100] For example, materials such as nitrile rubber, silicone rubber, and fluororubber can be used to manufacture the elastic sealing ring 503. Regarding the reinforcement ring 504, to improve its structural strength and reduce weight, high-strength glass fiber can be used to manufacture the reinforcement ring 504. Alternatively, a polyimide fiber-reinforced resin-based composite material can be used to manufacture the reinforcement ring 504. The composite material is composed of rubber, epoxy resin matrix, and polyimide fiber, and has higher reliability and resistance to impact and collision.

[0101] The reinforcement ring 504 is embedded in the annular protrusion 501, enhancing the structural strength of the annular protrusion 501. When the first box body 5 is clamped to the support frame 7, the reinforcement ring 504 can withstand a large clamping force, preventing the annular protrusion 501 from being crushed or deformed, thereby ensuring the stability and reliability of the clamping. Even when the battery device 2 is subjected to a large external impact or vibration, the reinforcement ring 504 can maintain the shape of the annular protrusion 501, ensuring that the clamping will not loosen. Due to the supporting effect of the reinforcement ring 504, the annular protrusion 501 of the elastic sealing ring 503 is not easily damaged during use, thereby extending the service life of the elastic sealing ring 503. At the same time, the structure of the entire first box body 5 is also more stable, reducing the maintenance and replacement costs caused by component damage.

[0102] In the above structure, the elastic sealing ring 503 has a certain degree of deformation performance, which can expand and increase strength during inflation, thereby improving the sealing performance. The reinforcement ring 504 is arranged within the annular protrusion 501, improving the structural performance of the annular protrusion 501, thereby improving the sealing performance between the annular protrusion 501 and the annular groove 703.

[0103] In some embodiments of the present application, the first box body 5 and the second box body 5 are arranged opposite to each other along the first direction X, and the elastic sealing ring 503 is formed with a first annular protrusion 505 and a second annular protrusion 506 arranged at intervals along the first direction X. The first annular protrusion 505 is arranged adjacent to the cover plate 502, and the second annular protrusion 506 is arranged adjacent to the second box body 5. The mating surface of the support frame 7 is correspondingly provided with a first annular groove 713 and a second annular groove 716. The first annular protrusion 505 and the first annular groove 713, and the second annular protrusion 506 and the second annular groove 716 respectively form a double sealing mating structure.

[0104] The elastic sealing ring 503 is provided on the first housing 5 and is formed with a first annular protrusion 505 and a second annular protrusion 506 spaced apart along the first direction X. The first annular protrusion 505 is provided adjacent to the cover plate 502, and the second annular protrusion 506 is provided adjacent to the second housing 5. The elastic sealing ring 503 is generally made of an elastic material and can deform to a certain extent when subjected to external force and recover part or all of its shape after the external force is removed. Figure 8 The support frame 7 has a mating surface with a first annular groove 713 and a second annular groove 716 respectively corresponding to the first annular protrusion 505 and the second annular protrusion 506 of the elastic sealing ring 503. The support frame 7 is used to engage with the first box body 5 and realize the sealing function through the double sealing structure.

[0105] The double-seal structure significantly improves the sealing reliability of the battery case 5. The first annular protrusion 505 and the first annular groove 713, and the second annular protrusion 506 and the second annular groove 716, respectively, form sealing interfaces. Even if one of the sealing interfaces fails due to some reason (such as wear, deformation, etc.), the other sealing interface can continue to perform its sealing function, effectively preventing external impurities such as moisture and dust from entering the interior of the battery case 5, protecting the battery cells from the influence of the external environment and extending the service life of the battery. The elastic properties of the elastic sealing ring 503 enable the double-seal structure to adapt to different operating conditions. When the battery device 2 is affected by factors such as vibration, temperature changes, or pressure fluctuations, the elastic sealing ring 503 can compensate for changes in the sealing gap through its own elastic deformation, ensuring that the two sealing interfaces always maintain good sealing performance.

[0106] Good sealing performance effectively prevents leakage of electrolyte and other substances within the battery device 2, avoiding safety accidents such as external electrical short circuits and fires caused by leakage, thereby improving the safety of the battery device 2. The double-sealed structure prevents external impurities from entering the battery case 5, while also preventing harmful substances released by the battery cells from escaping into the external environment, reducing environmental pollution and complying with environmental protection requirements.

[0107] In the above structure, by providing two annular protrusions 501 and correspondingly providing two annular grooves 703 , the connection strength and sealing performance between the support frame 7 and the first box portion 5 a are further improved.

[0108] In some embodiments of the present application, the reinforcement ring 504 includes a first reinforcement ring 507 and a second reinforcement ring 508. The first reinforcement ring 507 is embedded in the first annular protrusion 505, and the second reinforcement ring 508 is embedded in the second annular protrusion 506. Optionally, the first reinforcement ring 507 is placed together with the annular protrusion 501 into a first annular groove 713 formed by the first clamping portion 711 and the annular protrusion 501. The second reinforcement ring 508 is placed together with the second annular protrusion 506 into a second annular groove 716 formed by the second clamping portion 714 and the annular protrusion 501.

[0109] The first reinforcement ring 507 and the second reinforcement ring 508 respectively enhance the structural strength of the first annular protrusion 505 and the second annular protrusion 506, allowing the two protrusions to fit more tightly when mated with the corresponding annular groove 703, reducing the sealing gap and thus improving the reliability of the seal. Even when the battery device 2 is affected by external factors such as vibration and temperature changes, the reinforcement ring 504 can maintain the shape of the protrusion, ensuring that the sealing effect is not significantly affected. The first reinforcement ring 507 and the second reinforcement ring 508 provide additional support for the first annular protrusion 505 and the second annular protrusion 506, allowing them to withstand greater clamping force when clamped with the annular groove 703 and not easily crushed or loosened. This ensures a more stable connection between the first box body 5 and the support frame 7, improving the structural strength and stability of the entire battery device 2.

[0110] In the above structure, by providing a plurality of reinforcement rings 504, the structural strength of the annular protrusion 501 is improved, and the sealing performance between the first box body 5 and the second box body 5 is improved.

[0111] In some embodiments of the present application, the cover plate 502 and the elastic sealing ring 503 are an integrally formed structure.

[0112] An integrated structure refers to a process in which the cover plate 502 and the elastic sealing ring 503 are simultaneously formed into a single, integral component through a specific process (such as injection molding or compression molding), rather than being manufactured separately and then assembled. This integrated structure eliminates any distinct dividing line or gap between the cover plate 502 and the elastic sealing ring 503, allowing them to be tightly integrated into a continuous, integrated unit.

[0113] During the one-piece molding process, the elastic sealing ring 503 and the cover plate 502 are more tightly and evenly combined, and the flatness and consistency of the sealing surface are guaranteed. This enables the elastic sealing ring 503 to form a more uniform and tight sealing interface when cooperating with the annular groove 703 of the support frame 7, further enhancing the sealing effect. The one-piece molding structure does not require the cover plate 502 and the elastic sealing ring 503 to be manufactured and assembled separately, greatly simplifying the manufacturing process. This not only reduces the time and labor costs in the production process, but also reduces the production errors and quality problems caused by the complexity of the assembly process. The one-piece molding structure makes the cover plate 502 and the elastic sealing ring 503 become a whole, the connection strength between the two is higher, and the structure is more stable. When the battery device 2 is subjected to external force, the one-piece molding structure can better withstand and disperse stress, reducing the risk of structural damage caused by excessive local force.

[0114] In the above structure, the cover plate 502 and the elastic sealing ring 503 are made of the same material and manufactured through the same process, which can improve manufacturing efficiency and enhance connection strength.

[0115] In some embodiments of the present application, the first box body 5 also includes an extension plate 509, which extends vertically along the periphery of the cover plate 502 to form a transition structure connecting the cover plate 502 and the elastic sealing ring 503, and the elastic sealing ring 503 is fixedly connected to the end of the extension plate 509.

[0116] Optionally, the cover plate 502 , the extension plate 509 and the elastic sealing ring 503 are an integrally formed structure, wherein the extension plate 509 forms a transition structure connecting the cover plate 502 and the elastic sealing ring 503 .

[0117] Extension plate 509 acts as a transition structure, increasing the connection area and length between cover plate 502 and elastic sealing ring 503. Compared to a direct connection, this indirect connection method can better disperse stress, making the connection less likely to break or loosen when subjected to external forces such as vibration and impact, thereby improving the strength and stability of the entire first housing 5 structure.

[0118] Extension plate 509 provides a more stable mounting platform for elastic sealing ring 503. Once securely connected to the end of extension plate 509, elastic sealing ring 503 can more accurately engage annular groove 703 on support frame 7, forming a tighter sealing interface. Extension plate 509 also adjusts the relative position and angle between elastic sealing ring 503 and cover plate 502, ensuring that the sealing ring evenly fits within the groove after installation, enhancing the sealing effect.

[0119] In the above structure, the height of the first box body 5 is increased by providing the extension plate 509 , thereby increasing the space inside the box body 5 and improving the energy density of the battery device 2 .

[0120] In some embodiments of the present application, the end plate of the extension plate 509 is bent toward a side away from the accommodating space to form a bent plate 510 , and the elastic sealing ring 503 is connected to the bent plate 510 .

[0121] The elastic sealing ring 503 is connected to the bent plate 510 , and the two can be fixedly connected in a variety of ways, such as by bonding with adhesives, to ensure that the elastic sealing ring 503 is firmly installed on the bent plate 510 .

[0122] The design of the bent plate 510 provides a more suitable installation position and angle for the elastic sealing ring 503. When the elastic sealing ring 503 is attached to the bent plate 510, it forms a more uniform and tight sealing interface when mated with the annular groove 703 of the support frame 7. The bent plate 510 adjusts the installation direction of the elastic sealing ring 503, allowing it to better fit the groove and reduce the sealing gap, thereby improving the sealing reliability and effectively preventing impurities such as moisture and dust from entering the battery case 5.

[0123] The end of the extension plate 509 is bent to form a bent plate 510, increasing the complexity and strength of the structure. When the battery device 2 is subjected to external forces, the bent plate 510 can disperse the stress over a larger area, preventing stress from being concentrated in a specific part of the extension plate 509 or the elastic sealing ring 503. This reduces the risk of component damage and improves the stability of the entire first housing 5 structure. The structural design of the bent plate 510 enables the first housing 5 to better resist deformation when subjected to external compression or tension. Together with the extension plate 509, it forms a more stable frame structure, providing reliable support for the elastic sealing ring 503 and ensuring the integrity of the sealing structure.

[0124] The design of the bent plate 510 can be achieved during the manufacturing process of the extension plate 509 through simple stamping and bending processes, without significantly increasing the manufacturing difficulty and cost. Furthermore, this structure provides clear positioning and guidance for the installation of the elastic sealing ring 503, facilitating automated assembly on the production line and improving production efficiency.

[0125] In the above structure, the contact area between the first box body 5 and the support frame 7 is increased by providing the bent plate, thereby improving the sealing performance between the first box body 5 and the support frame 7 .

[0126] In some embodiments of the present application, a metal support mesh is embedded in the elastic sealing ring 503 , and the metal support mesh is continuously extended along the circumference of the elastic sealing ring 503 .

[0127] A metal support mesh is embedded within the elastic sealing ring 503. The metal support mesh is made of a metal material, such as stainless steel or copper, which has good strength and toughness. The metal support mesh extends continuously along the circumference of the elastic sealing ring 503 to form a complete annular structure, tightly integrated with the elastic sealing ring 503.

[0128] The metal support mesh provides internal support for the elastic sealing ring 503, allowing it to maintain a certain shape and dimensional stability when subjected to pressure. During the operation of the battery device 2, it may be affected by factors such as vibration and temperature changes, and the elastic sealing ring 503 is prone to deformation. The presence of the metal support mesh can limit excessive deformation of the elastic sealing ring 503, ensuring that the sealing ring always maintains good contact with the sealing surface, thereby improving the reliability of the seal and reducing the risk of leakage. When the pressure inside or outside the battery case 5 changes, the elastic sealing ring 503 needs to withstand the corresponding pressure. The metal support mesh can enhance the pressure resistance of the elastic sealing ring 503, allowing it to maintain sealing performance under higher pressure. At the same time, when the pressure decreases, the metal support mesh can help the elastic sealing ring 503 quickly return to its original state and continue to perform its sealing function.

[0129] During long-term use of the battery device 2, the elastic sealing ring 503 is constantly subjected to cycles of pressure and deformation, which can easily lead to fatigue damage. The metal support mesh can share the stress of the elastic sealing ring 503, reducing its fatigue level and improving its fatigue resistance, ensuring that it maintains a good sealing effect during long-term use.

[0130] The metal support mesh can make it easier to position and fix the elastic sealing ring 503 during installation. Due to its certain rigidity and shape stability, when the elastic sealing ring 503 needs to be maintained or replaced, the presence of the metal support mesh can make it easier to remove the elastic sealing ring 503 from the sealing position and install a new sealing ring.

[0131] In the above structure, by providing the metal support mesh, the structural performance of the elastic sealing ring 503 is improved while the inflation and expansion deformation of the elastic sealing ring 503 is not affected.

[0132] In some embodiments of the present application, the metal support mesh includes at least two mesh reinforcement layers, each mesh reinforcement layer is arranged in parallel and spaced apart along the thickness direction of the elastic sealing ring 503, and adjacent mesh reinforcement layers are fixed to each other by connecting ribs to form a multi-layer composite support structure.

[0133] Multiple layers of mesh reinforcement are arranged in parallel and spaced apart. When the elastic sealing ring 503 is subjected to pressure, each layer of mesh reinforcement can share the pressure, just like multiple "pillars" supporting it simultaneously, greatly enhancing the elastic sealing ring 503's ability to withstand pressure. Connecting ribs connect the layers together, making the entire structure more stable, reducing deformation caused by excessive local stress, and ensuring that the elastic sealing ring 503 can maintain shape and size stability under complex working conditions. During long-term use of the battery device 2, the elastic sealing ring 503 will be continuously subjected to the cyclic effects of pressure and deformation, which can easily cause fatigue damage. The multi-layer composite support structure can disperse stress and reduce stress concentration, making the elastic sealing ring 503 less likely to develop fatigue cracks when subjected to repeated stress, thereby extending its service life.

[0134] The multi-layered composite structure of the metal support mesh provides excellent support for the elastic seal, allowing the elastic sealing ring 503 to deform more evenly when squeezed, maintaining the flatness of the sealing interface. This ensures close contact between the elastic sealing ring 503 and the sealing surface, reducing leakage paths and improving sealing performance.

[0135] The structural design of the multi-layer mesh reinforcement layer and connecting ribs is relatively simple, making them easy to manufacture using processes such as stamping and welding. During the production process, each layer of the mesh reinforcement layer and connecting ribs can be manufactured separately, then assembled into a metal support mesh, and finally embedded into the elastic sealing ring 503, thereby improving production efficiency and product quality.

[0136] The above structure is provided with multiple mesh reinforcement layers, which can improve the structural strength of the elastic sealing ring 503. The connecting ribs connect the multiple mesh reinforcement layers, reducing the risk of displacement of the mesh reinforcement layers.

[0137] In some embodiments of the present application, the support frame 7 includes a first side plate 704, a second side plate 705, a top plate 706, and a bottom plate 707. The first side plate 704 is arranged opposite to the elastic sealing ring 503, the second side plate 705 is arranged opposite to the first side plate 704, and the second side plate 705 is arranged between the first side plate 704 and the elastic sealing ring 503. The top plate 706 is connected between the first side plate 704 and the second side plate 705, and the top plate 706 is arranged on the side of the first side plate 704 facing the cover plate 502. The bottom plate 707 is connected between the first side plate 704 and the second side plate 705 and is arranged opposite to the top plate 706. The bottom plate 707 is fixedly connected to the second box body 5 by structural adhesive. Among them, the first side plate 704, the top plate 706, the second side plate 705, and the bottom plate 707 together enclose a closed air guide cavity 708.

[0138] The first side panel 704 may be an annular plate-like structure arranged around the receiving space, and the second side panel 705 may be an annular plate-like structure arranged around the outer periphery of the first side panel 704. The top panel 706 is connected between the first and second side panels 704, 705, and is located on the side of the first side panel 704 facing the cover panel 502. It provides support and sealing for the top of the support frame 7, and may also provide a certain support or limit effect for the cover panel 502. The bottom panel 707 is connected between the first and second side panels 704, 705, and is arranged opposite the top panel 706. The bottom panel 707 is fixedly connected to the second housing 5 via structural adhesive, tightly integrating the support frame 7 and the second housing 5 to form a stable integral structure. The first side panel 704, the top panel 706, the second side panel 705, and the bottom panel 707 together enclose a closed air guide cavity 708. This air guide cavity 708 is a relatively independent space that can accommodate gas and may have specific gas circulation or pressure regulation functions.

[0139] The first side plate 704, the second side plate 705, the top plate 706, and the bottom plate 707 are interconnected to form a stable frame structure. This structure can effectively disperse and withstand various external forces, such as vibration and impact, thereby improving the structural strength and stability of the support frame 7 and the entire battery case 5. The first side plate 704 is arranged opposite the elastic sealing ring 503, providing a stable support base for the elastic sealing ring 503. During the operation of the battery device 2, the elastic sealing ring 503 needs to withstand a certain amount of pressure and deformation. The presence of the first side plate 704 can prevent the elastic sealing ring 503 from excessive deformation or displacement, thereby ensuring the stability and reliability of the sealing structure.

[0140] Optionally, corresponding vents 710 or valves may be provided on the gas guide cavity 708 to control the flow of gas into and out of the cavity. For example, during the charge and discharge process of the battery device 2, the gas pressure in the gas guide cavity 708 and the air pressure strength within the elastic seal are adjusted in a timely manner based on the pressure changes within the battery case 5, thereby maintaining a stable pressure within the battery case 5 and facilitating normal battery operation.

[0141] In the above structure, the first side plate 704, top plate 706, second side plate 705, and bottom plate 707 are interconnected to form a sealed air guide cavity 708, which can improve the introduction of gas into the sealed cavity 701. The second side plate 705 is connected to the second box body 5 by structural adhesive, which improves the connection stability between the support frame 7 and the box body 5.

[0142] In some embodiments of the present application, the second side plate 705 extends toward the second box body 5 to form an extension plate 709, and the extension plate 709 protrudes from the side surface of the elastic sealing ring 503 facing the second box body 5. The inflation hole 702 is provided on the extension plate 709, and a sealing plug 720 is also provided on the inflation hole 702. A vent hole 710 is provided on the second side plate 705, and the vent hole 710 connects the air guide cavity 708 with the sealing cavity 701.

[0143] The provision of the extension plate 709 makes the position of the inflation hole 702 more convenient for operation. Since the extension plate 709 protrudes from the side surface of the elastic sealing ring 503 facing the second box body 5, the operator can more easily approach the inflation hole 702 during inflation without having to perform complicated operations or adjustments on the elastic sealing ring 503 or other components, thereby improving the efficiency and convenience of the inflation operation. The sealing plug 720 on the inflation hole 702 can effectively prevent gas leakage. After inflation is completed, the sealing plug 720 can tightly seal the inflation hole 702 to ensure that the gas pressure in the air guide cavity 708 or the sealing cavity 701 is stable, thereby ensuring the reliability of the sealing structure. Even if the battery device 2 is affected by vibration or temperature changes during use, the sealing plug 720 can maintain its sealing performance and reduce the risk of gas leakage.

[0144] The vent 710 on the second side plate 705 connects the gas-guiding cavity 708 with the sealed cavity 701, thereby forming a gas flow channel between the two chambers. Through this connection, the gas pressure in the two chambers can be adjusted according to actual needs to achieve pressure balance. For example, when the pressure in the gas-guiding cavity 708 is too high, gas can flow into the sealed cavity 701 through the vent 710, reducing the pressure in the gas-guiding cavity 708. Conversely, when the pressure in the sealed cavity 701 is too high, gas can also flow into the gas-guiding cavity 708, thereby preventing damage to the sealing structure due to pressure imbalance or affecting the normal operation of the battery device 2.

[0145] The structural design of the extension plate 709 and the second side plate 705 increases the overall strength of the support frame 7. The protruding portion of the extension plate 709 provides additional support and positioning for other components, making the entire support frame 7 more stable. Furthermore, the provision of the ventilation holes 710 on the second side plate 705 and the air filling holes 702 on the extension plate 709 does not weaken the structural strength of the second side plate 705. On the contrary, through reasonable layout and design, the support frame 7 maintains good structural stability while meeting functional requirements.

[0146] In the above structure, the provision of extension plate 709 increases the height of support frame 7, expanding the internal space of housing 5 and increasing the available space for battery cells. Furthermore, extension plate 709 extends beyond the underside of elastic sealing ring 503, facilitating connection of inflation hole 702 with air guide cavity 708 of support frame 7 for inflation. Compared to arrangements where inflation hole 702 is located on the elastic seal, placement of inflation hole 702 on support frame 7 reduces the risk of deformation, thereby improving the sealing performance of housing 5.

[0147] In some embodiments of the present application, the top plate 706 extends toward the elastic sealing ring 503 to form an annular first clamping portion 711. The first clamping portion 711 protrudes from the surface of the second side plate 705 facing the elastic sealing ring 503 and abuts against the bent plate 510. An annular first raised portion 712 is provided on the surface of the second side plate 705 facing the elastic sealing ring 503. A first annular groove 713 is formed between the first raised portion 712 and the first clamping portion 711.

[0148] The top plate 706 extends toward the elastic sealing ring 503 to form an annular first clamping portion 711. This first clamping portion 711 protrudes from the top plate 706 toward the elastic sealing ring 503. Furthermore, the first clamping portion 711 protrudes from the surface of the second side plate 705 facing the elastic sealing ring 503 and abuts against the bent plate 510. This means that the first clamping portion 711 protrudes a certain amount perpendicular to the surface of the second side plate 705 and is in contact with the bent plate 510, providing a certain positioning and support function. An annular first raised portion 712 is provided on the side surface of the second side plate 705 facing the elastic sealing ring 503. A first annular groove 713 is formed between the first raised portion 712 and the first clamping portion 711. The first annular groove 713 is a surrounding spatial structure, whose shape and size are determined by the relative positions and shapes of the first raised portion 712 and the first clamping portion 711.

[0149] The first clamping portion 711 abuts against the bent plate 510. This abutting relationship increases the connection strength between the top plate 706 and other components (the bent plate 510). When the battery device 2 is subjected to external forces such as vibration and impact, the first clamping portion 711 can effectively transfer the force to the bent plate 510, preventing the top plate 706 from loosening or separating from other components, thereby improving the stability of the entire support frame 7 structure. The first annular groove 713 formed between the first protrusion 712 and the first clamping portion 711 provides a precise positioning space for the elastic sealing ring 503 or other related components. During the installation process, the elastic sealing ring 503 can be accurately embedded in the first annular groove 713 to ensure its accurate position, avoiding problems such as poor sealing or structural instability caused by installation deviation.

[0150] The first annular groove 713 can closely mate with the elastic sealing ring 503 to form an additional sealing area. When the elastic sealing ring 503 is inserted into the first annular groove 713, the first protrusion 712 and the first engaging portion 711 can exert a certain degree of compression on the elastic sealing ring 503, making it fit better against the groove surface, reducing the leakage path of gas or liquid, and thus improving the sealing performance.

[0151] In the above structure, the first clamping portion 711 increases the connection area with the bent plate 510 and improves the sealing performance. In addition, the first protrusion 712 and the first clamping portion 711 form an annular groove 703, which cooperates with the annular protrusion 501 to improve the sealing performance.

[0152] In some embodiments of the present application, the second side plate 705 protrudes toward the elastic sealing ring 503 to form an annular second clamping portion 714. An annular second protrusion 715 is provided on a surface of the second side plate 705 facing the elastic sealing ring 503, and a second annular groove 716 is formed between the second protrusion 715 and the second clamping portion 714.

[0153] The combined design of the second clamping portion 714 and the second protrusion 715 increases the connection strength between the second side plate 705 and other components (such as the elastic sealing ring 503 or related sealing structure). The protrusion of the second clamping portion 714 can form a snap fit with other components during installation, preventing relative sliding or falling between the components, thereby improving the stability of the entire structure. Similar to the snap connection in a mechanical structure, the second clamping portion 714 can withstand a certain amount of tension and shear force, allowing the various components to be tightly combined to form a stable whole. The second annular groove 716 can closely cooperate with the elastic sealing ring 503 or other sealing components to form an additional sealing area. When the elastic sealing ring 503 is embedded in the second annular groove 716, the second protrusion 715 and the second clamping portion 714 can exert a certain squeezing effect on the elastic sealing ring 503, allowing it to better fit the groove surface, reducing the leakage path of gas or liquid, thereby improving the sealing performance.

[0154] In the above structure, the second clamping portion 714 and the first protruding portion 712 are provided to form an annular groove 703 , thereby improving the sealing performance of the box body 5 .

[0155] like Figure 8 As shown, in some embodiments of the present application, a limiting protrusion 717 is provided on the surface of the first clamping portion 711 facing the bending plate 510, and a limiting groove 511 is correspondingly provided on the surface of the bending plate 510 facing the first clamping portion 711, and the limiting protrusion 717 is embedded in the limiting groove 511 to limit the movement of the first box body 5 relative to the support frame 7.

[0156] A limiting protrusion 717 is provided on the surface of the first clamping portion 711 facing the bent plate 510. The limiting protrusion 717 is a portion of a structure protruding from the surface of the first clamping portion 711 and has a certain shape and size, such as a cylindrical, square, or other regular or irregular shape. A limiting groove 511 is provided on the surface of the bent plate 510 facing the first clamping portion 711 at the position corresponding to the limiting protrusion 717. The limiting groove 511 is a space formed by an inward depression on the surface of the bent plate 510. Its shape and size match the limiting protrusion 717 so that the limiting protrusion 717 can be embedded therein. When the first clamping portion 711 and the bent plate 510 are close to each other, the limiting protrusion 717 embeds into the limiting groove 511. Through this embedding and matching relationship, the movement of the first box body 5 relative to the support frame 7 is restricted, so that the first box body 5 and the support frame 7 maintain a relatively fixed positional relationship.

[0157] The limiting protrusion 717 is embedded in the limiting groove 511, limiting the relative movement of the first box body 5 in the horizontal direction (parallel to the contact surface between the bent plate 510 and the first clamping portion 711). When the battery device 2 is subjected to vibration, impact, or external force, this limiting structure can ensure that the connection between the first box body 5 and the support frame 7 is firm and will not cause the structure to loosen or be damaged due to relative displacement, thereby improving the structural stability of the entire battery device 2. The limiting structure increases the contact area and friction between the first clamping portion 711 and the bent plate 510, further enhancing the connection strength between them. Compared with a simple clamping or abutting structure, the combination of the limiting protrusion 717 and the limiting groove 511 can withstand greater external forces, making the connection between the first box body 5 and the support frame 7 more reliable.

[0158] The cooperation between the limiting protrusion 717 and the limiting groove 511 limits the movement of the first box body 5, avoiding damage or deformation of the sealing structure (such as the elastic sealing ring 503) due to relative displacement, thereby ensuring the stability of the sealing performance.

[0159] In the above structure, the limiting protrusion 717 is engaged with the limiting groove 511 , which limits the movement of the first engaging portion 711 relative to the bending plate 510 , thereby improving the connection stability between the first box body 5 and the support frame 7 .

[0160] In some embodiments of the present application, a surface of the second clamping portion 714 facing the elastic sealing ring 503 is provided with a clamping protrusion 718 , and the clamping protrusion 718 abuts against a side of the elastic sealing ring 503 facing away from the sealing cavity 701 .

[0161] A snap-fit ​​protrusion 718 is provided on the surface of the second snap-fit ​​portion 714 facing the elastic sealing ring 503. This snap-fit ​​protrusion 718 is a structure with a certain shape and size that protrudes from the surface of the second snap-fit ​​portion 714. For example, it can be a regular shape such as a semicircle, triangle, or trapezoid, or it can be an irregular shape designed according to actual needs. The snap-fit ​​protrusion 718 abuts the side of the elastic sealing ring 503 facing away from the sealing cavity 701. That is, the snap-fit ​​protrusion 718 directly contacts the outer surface of the elastic sealing ring 503. This abutment provides a certain restraint and fixation effect on the elastic sealing ring 503. The snap-fit ​​protrusion 718 can be arranged around the periphery of the sealing elastic member, or it can be a plurality of point-like structures spaced along the periphery of the elastic sealing member.

[0162] During the operation of the battery device 2, it may be affected by factors such as vibration, impact, or changes in internal pressure, causing the elastic sealing ring 503 to move or deform. The snap-fit ​​protrusion 718 abuts against the side of the elastic sealing ring 503 facing away from the sealing cavity 701, which can effectively limit the movement of the elastic sealing ring 503 in a direction perpendicular to the sealing surface, preventing it from detaching from the sealing position, thereby ensuring the stability of the sealing structure. When the pressure in the sealing cavity 701 changes, the elastic sealing ring 503 will be subjected to certain stresses. The presence of the snap-fit ​​protrusion 718 can disperse these stresses, avoid stress concentration in a certain local area of ​​the elastic sealing ring 503, reduce the risk of damage to the elastic sealing ring 503 due to stress concentration, and extend its service life.

[0163] The abutment of the engaging protrusion 718 against the elastic sealing ring 503 causes a certain degree of compression deformation of the elastic sealing ring 503, thereby increasing the contact pressure between the elastic sealing ring 503 and the sealing surface. This increased contact pressure can better fill the small gap between the sealing surfaces, improve the sealing effect, and reduce the leakage of gas or liquid.

[0164] In the above structure, by providing the engaging protrusion 718 , the elastic sealing ring 503 is restricted from moving relative to the support frame 7 , thereby improving the connection stability between the first box body 5 and the support frame 7 .

[0165] In some optional embodiments, the battery device 2 includes a battery cell, a case 5 and a support frame 7. The case 5 includes a first case 5 portion and a second case 5 portion that cover each other, and the first case 5 portion and the second case 5 portion enclose a storage space for accommodating the battery cell. The support frame 7 is fixed to the end surface of the second case 5 portion facing the first case 5 portion, and is arranged along the circumference of the second case 5 portion. The first case 5 portion and the support frame 7 are mutually engaged, and an annular sealed cavity 701 is formed between the support frame 7 and the first case 5 portion. An inflation hole 702 communicating with the sealed cavity 701 is provided on the support frame 7. The inflation hole 702 is used to inflate the sealed cavity 701 to expand the sealed cavity 701, so as to enhance the sealing connection strength between the support frame 7 and the first case 5 portion. The first case 5 portion includes a cover plate 502, an elastic sealing ring 503 and a reinforcement ring 504. The cover plate 502 and the second housing 5 are disposed opposite each other. An elastic sealing ring 503 is continuously disposed around the periphery of the cover plate 502. An annular protrusion 501 is provided on the side of the elastic sealing ring 503 facing the support frame 7. A reinforcement ring 504 is embedded within the annular protrusion 501 and extends continuously along the circumference of the elastic sealing ring 503. The first housing 5 and the second housing 5 are disposed opposite each other along a first direction X. The elastic sealing ring 503 is formed with a first annular protrusion 505 and a second annular protrusion 506 spaced apart along the first direction X. The first annular protrusion 505 is disposed adjacent to the cover plate 502, and the second annular protrusion 506 is disposed adjacent to the second housing 5. A first annular groove 713 and a second annular groove 716 are correspondingly disposed on the mating surface of the support frame 7. The first annular protrusion 505 and the first annular groove 713, and the second annular protrusion 506 and the second annular groove 716, respectively, form a double sealing structure. The reinforcement ring 504 includes a first reinforcement ring 507 and a second reinforcement ring 508. The first reinforcement ring 507 is embedded in the first annular protrusion 505, and the second reinforcement ring 508 is embedded in the second annular protrusion 506. A metal support mesh is embedded in the elastic sealing ring 503, and the metal support mesh extends continuously along the circumference of the elastic sealing ring 503. The metal support mesh includes at least two layers of mesh reinforcement layers, each mesh reinforcement layer is arranged parallel and spaced along the thickness direction of the elastic sealing ring 503, and adjacent mesh reinforcement layers are fixed to each other by connecting ribs to form a multi-layer composite support structure. The support frame 7 includes a first side plate 704, a second side plate 705, a top plate 706, and a bottom plate 707. The first side plate 704 is arranged opposite the elastic sealing ring 503, and the second side plate 705 is arranged opposite the first side plate 704. The second side plate 705 is arranged between the first side plate 704 and the elastic sealing ring 503. The top plate 706 is connected between the first side plate 704 and the second side plate 705 and is located on the side of the first side plate 704 facing the cover plate 502. The bottom plate 707 is connected between the first side plate 704 and the second side plate 705 and is located opposite the top plate 706. The bottom plate 707 is fixedly connected to the second box body 5 using structural adhesive.The first side plate 704, top plate 706, second side plate 705, and bottom plate 707 collectively enclose a closed air guide cavity 708. The second side plate 705 extends toward the second housing 5 to form an extension plate 709. The extension plate 709 protrudes from the side surface of the elastic sealing ring 503 facing the second housing 5. The air filling hole 702 is provided on the extension plate 709. A sealing plug 720 is also provided on the air filling hole 702. The second side plate 705 is provided with an air vent 710, which connects the air guide cavity 708 with the sealed cavity 701.

[0166] The embodiment of the present application also provides an electrical device, which includes the battery device 2 in the above embodiment, and the battery device 2 is used to provide electrical energy. In the battery device 2, a support frame 7 is provided to be fixedly connected to the second box body 5. The support frame 7 is added on the basis of not changing the structure of the original box body 5, thereby improving the sealing performance of the connection between the first box body 5 and the second box body 5. The support frame 7 is clamped to the inner side of the first box body 5, and the first box body 5 and the second box body 5 can be connected in a detachable manner, which is convenient for the maintenance and replacement of the box body 5. A sealed cavity 701 is provided between the support frame 7 and the first box body 5, and is circumferentially arranged around the first box body 5. The sealed cavity 701 is expanded by inflation, thereby increasing the connection strength between the support frame 7 and the first box body 5, thereby improving the sealing performance between the first box body 5 and the support frame 7. Furthermore, the above structure can replace the structure of sealant and connecting bolts, effectively improving the overall sealing performance of the box body 5.

[0167] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cells; The box body includes a first box body portion and a second box body portion covering each other, wherein the first box body portion and the second box body portion enclose a storage space for accommodating the battery cell; a support frame, fixed to the end surface of the second box body facing the first box body, and arranged along the circumference of the second box body; The first box body and the support frame are clamped with each other, and an annular sealed cavity is formed between the support frame and the first box body. The support frame is provided with an inflation hole connected to the sealed cavity. The inflation hole is used to inflate the sealed cavity to expand the sealed cavity, so as to enhance the sealing connection strength between the support frame and the first box body.

2. The battery device according to claim 1, wherein: An annular groove is provided on the surface of the support frame facing the first box body, and an annular protrusion is provided on the corresponding position of the first box body facing the support frame. The annular protrusion cooperates with the annular groove to clamp the support frame and the first box body.

3. The battery device according to claim 2, characterized in that The first housing portion includes: a cover plate, disposed opposite to the second box body; An elastic sealing ring is continuously arranged along the periphery of the cover plate, and the annular protrusion is provided on a side of the elastic sealing ring facing the support frame; The reinforcement ring is embedded in the annular protrusion and extends continuously along the circumference of the elastic sealing ring.

4. The battery device according to claim 3, characterized in that The first box body portion and the second box body portion are arranged opposite to each other along a first direction, and a first annular protrusion and a second annular protrusion are formed on the elastic sealing ring and are arranged at intervals along the first direction. The first annular protrusion is arranged adjacent to the cover plate, and the second annular protrusion is arranged adjacent to the second box body portion. A first annular groove and a second annular groove are correspondingly provided on the mating surface of the support frame, and the first annular protrusion and the first annular groove, and the second annular protrusion and the second annular groove respectively form a double sealing mating structure.

5. The battery device according to claim 4, characterized in that The reinforcement ring includes a first reinforcement ring and a second reinforcement ring. The first reinforcement ring is embedded in the first annular protrusion, and the second reinforcement ring is embedded in the second annular protrusion.

6. The battery device according to any one of claims 3 to 5, characterized in that: The cover plate and the elastic sealing ring are an integrally formed structure.

7. The battery device according to any one of claims 3 to 5, characterized in that: The first box body also includes an extension plate, which is vertically extended along the periphery of the cover plate to form a transition structure connecting the cover plate and the elastic sealing ring, and the elastic sealing ring is fixedly connected to the end of the extension plate.

8. The battery device according to claim 7, characterized in that The end plate of the extension plate is bent toward a side away from the accommodating space to form a bent plate, and the elastic sealing ring is connected to the bent plate.

9. The battery device according to claim 8, characterized in that A metal support mesh is embedded in the elastic sealing ring, and the metal support mesh is continuously extended along the circumference of the elastic sealing ring.

10. The battery device according to claim 9, characterized in that The metal support mesh includes at least two mesh reinforcement layers, each of which is arranged in parallel and spaced apart along the thickness direction of the elastic sealing ring. Adjacent mesh reinforcement layers are fixed to each other by connecting ribs to form a multi-layer composite support structure.

11. The battery device according to any one of claims 8 to 10, characterized in that: The support frame includes: a first side plate, arranged opposite to the elastic sealing ring; a second side plate, disposed opposite to the first side plate, and disposed between the first side plate and the elastic sealing ring; a top plate connected between the first side plate and the second side plate, the top plate being arranged on a side of the first side plate facing the cover plate; The bottom plate is connected between the first side plate and the second side plate and is arranged opposite to the top plate. The bottom plate and the second box body are fixedly connected by structural adhesive. The first side plate, the top plate, the second side plate and the bottom plate together form a closed air guide cavity.

12. The battery device according to claim 11, wherein: The second side plate extends toward the second box body to form an extension plate, and the extension plate protrudes from the side surface of the elastic sealing ring facing the second box body. The inflation hole is provided on the extension plate, and a sealing plug is also provided on the inflation hole. The second side plate is provided with an air vent, and the air vent connects the air guide cavity with the sealing cavity.

13. The battery device according to claim 11, wherein: The top plate extends toward the elastic sealing ring to form a first annular clamping portion, the first clamping portion protrudes from the surface of the second side plate facing the elastic sealing ring and abuts against the bent plate. A first annular protrusion is provided on a surface of the second side plate facing the elastic sealing ring, and a first annular groove is formed between the first protrusion and the first clamping portion.

14. The battery device according to claim 11, wherein: The second side plate protrudes toward the elastic sealing ring to form a second annular clamping portion. A second annular protrusion is provided on a surface of the second side plate facing the elastic sealing ring, and a second annular groove is formed between the second protrusion and the second clamping portion.

15. The battery device according to claim 13, wherein: A limiting protrusion is provided on the surface of the first clamping portion facing the bending plate, and a limiting groove is correspondingly provided on the surface of the bending plate facing the first clamping portion. The limiting protrusion is embedded in the limiting groove to limit the movement of the first box body relative to the support frame.

16. The battery device according to claim 14, wherein: A clamping protrusion is provided on a surface of the second clamping portion facing the elastic sealing ring, and the clamping protrusion abuts against a side of the elastic sealing ring facing away from the sealing cavity.

17. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 16, and the battery device is used to provide electrical energy.

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