Battery device, energy storage device, energy storage system, electric device, and charging network

Abstract

The present application belongs to the technical field of battery production. Provided are a battery device, an energy storage device, an energy storage system, an electric device and a charging network. The battery device comprises a battery cell assembly and a case, wherein the case comprises a case body and a case cover, which are connected to each other and jointly enclose an accommodating space in which the battery cell assembly is accommodated; the case cover comprises a cover and a frame; the cover has an edge portion; the frame comprises a frame body and a flange structure, the frame body being arranged around the cover and connected to the edge portion, and the flange structure being arranged around the frame body and connected to the frame body; and the cover is a plate, and the frame is an injection-molded member. The present application aims to reduce the manufacturing cost of the case cover.

Description

Battery devices, energy storage devices, energy storage systems, electrical devices and charging networks

[0001] This application claims priority to Chinese Patent Application No. 2024115711512, filed with the State Intellectual Property Office of China on November 6, 2024, entitled “Battery Device, Energy Storage Device, Energy Storage System, Power Consumption Device and Charging Network”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery manufacturing technology, and in particular to a battery device, energy storage device, energy storage system, power consumption device, and charging network. Background Technology

[0003] Battery packs typically have an external enclosure that protects the individual battery cells. The enclosure usually has a split design, consisting of a cover and a main body, with the cover resting on the main body.

[0004] In related technologies, the case cover is manufactured using a one-piece injection molding method, which makes the case cover difficult to manufacture and has high processing costs, thus affecting the manufacturing cost of the battery device. Summary of the Invention

[0005] The purpose of this application is to provide a battery device, energy storage device, energy storage system, power consumption device, and charging network, aiming to solve the technical problems of the difficulty in manufacturing and high manufacturing cost of the battery device's casing cover. Technical solutions

[0006] The technical solution adopted in the embodiments of this application is:

[0007] In a first aspect, this application provides a battery device, comprising:

[0008] Battery cell assembly;

[0009] The enclosure includes a main body and a cover. The cover is connected to the main body and together they enclose a storage space, in which the battery cell assembly is housed. The cover includes a cover body and a frame body. The cover body has an edge portion. The frame body includes a frame body and a flange structure. The frame body surrounds the cover body and is connected to the edge portion. The flange structure surrounds the frame body and is connected to the frame body. The cover body is made of sheet metal, and the frame body is an injection molded part.

[0010] In this embodiment, the lid of the box is made by combining a lid and a frame, which allows the lid and frame to be manufactured separately. The lid is made of pre-formed sheet metal, which can be directly made from finished sheet metal, making the lid easy to obtain and manufacture. The frame is made of injection molded part and is manufactured separately by injection molding. Only the frame needs to be injection molded, which helps to reduce the requirements for the injection molding machine. The tonnage requirement of the injection molding machine can be relatively reduced, which helps to reduce the manufacturing cost.

[0011] In one embodiment, the cover and the frame are made of different materials.

[0012] In this embodiment, the cover and the frame are made of different materials, which allows the cover to be made of a material with a smaller thickness. While meeting the rigidity and stiffness requirements, the thickness can be reduced as much as possible, thereby helping to reduce the overall weight of the cover and battery device.

[0013] In one embodiment, the cover is a plate structure made of composite material, plastic material, mica material, ceramic material or metal material; the frame is an injection molded part made of polymer material or composite material.

[0014] In this embodiment, the cover and the frame can be made of different or the same materials, which makes the material selection of the cover and the frame more flexible, and the material form and structural form of the box cover more varied.

[0015] In one embodiment, the flange structure extends around a preset axis and has a flange face; the edge extends to the frame body and overlaps and covers the frame body, so that the edge is attached to and connected to the frame body.

[0016] In this embodiment, the edge extends to the frame body and connects with the frame body. The edge can cover the entire surface of the frame body, thereby increasing the connection area between the edge and the frame body, which is beneficial to improving the connection strength.

[0017] In one embodiment, the frame body includes a first support and a second support. The second support extends around a preset axis and is connected to a flange structure. The second support protrudes from the flange structure in a direction parallel to the preset axis. The first support is connected to the protruding end of the second support and extends toward the preset axis. The edges of the first support are attached to and connected to the second support.

[0018] In this embodiment, the edge extends to the second support, so that the edge can be connected to the second support in addition to being connected to the first support. This increases the connection area between the edge and the frame body, which helps to enhance the connection strength between the edge and the frame body and improve the box cover's resistance to damage.

[0019] In one embodiment, the edge extends from the frame body to the flange surface, so that the edge is connected to both the frame body and the flange structure.

[0020] In this embodiment, while the edge is connected to the frame body, it can also be connected to the flange structure, thereby increasing the connection and assembly area between the cover and the frame, and thus improving the connection strength between the cover and the frame.

[0021] In one embodiment, the edge portion includes a first edge sub-part and a second edge sub-part connected to the first edge sub-part. The first edge sub-part is attached to and connected to the frame body; the second edge sub-part extends to the flange face and is connected to the flange structure.

[0022] In this embodiment, the edge portion can be connected to the flange structure while being connected to the frame body, thereby increasing the connection area between the edge portion and the frame body, which helps to improve the connection strength between the lid and the frame body, and improve the strength and resistance to damage of the lid.

[0023] In one embodiment, the frame further includes multiple gate platforms connected to the first support. The gate platforms extend from the side edge of the first support away from the second support towards a direction close to a preset axis. The multiple gate platforms are distributed at intervals around the preset axis. The gate platforms have injection through holes. The gate platforms are attached to and connected to the edge portion.

[0024] In this embodiment, by connecting the gating platform to the first support, it is easier to arrange the gating holes, which helps to improve the connection between the cover and the first support.

[0025] In one embodiment, the edge portion includes a first edge sub-part and a second edge sub-part connected to the first edge sub-part. The first edge sub-part is attached to and connected to both the first support and the second support. The second edge sub-part extends to the flange face and is connected to the flange structure.

[0026] In this embodiment, the edge portion can be connected to the first support body and the second support body while also being connected to the flange structure, thereby increasing the connection area between the edge portion and the frame, which helps to improve the connection strength between the lid and the frame, and improve the strength and resistance to damage of the lid.

[0027] In one embodiment, both the first support and the second support are plate-shaped.

[0028] In this embodiment, the first support and the second support are made of plate-shaped structure, which is convenient to manufacture and helps to reduce the weight of the box cover, thus helping to achieve lightweighting of the battery device.

[0029] In one embodiment, the flange structure has multiple flange holes that are spaced apart and surround a preset axis; the second edge sub-part includes multiple edge bodies that are all connected to the first edge sub-part, each edge body is connected to the flange structure, the multiple edge bodies are spaced apart and surround a preset axis, and the edge bodies avoid the flange holes.

[0030] In this embodiment, the second edge sub-part adopts a structure in which multiple edge bodies are arranged at intervals, so that the second edge sub-part can avoid the flange holes on the flange structure and help reduce the weight of the second edge sub-part, thereby facilitating the lightweighting of the box cover.

[0031] In one embodiment, the flange structure has a flange face, and multiple groove structures are provided on the flange face of the flange structure. Each edge body is inserted into the groove structure, so that the upper surface of each edge body is flush with the flange face.

[0032] In this embodiment, the upper surface of each edge body is flush with the flange face, so that the flange face and the surface of the edge body form a plane. For example, a groove structure is opened on the flange face corresponding to the position of each edge body, so that the edge body is inserted into and accommodated in the groove structure, and the surface of the edge body is kept flush with the flange face.

[0033] In one embodiment, the edge portion is flat and includes a first insertion structure. An edge portion is formed on the frame body and includes a second insertion structure. The first insertion structure and the second insertion structure are inserted and engaged.

[0034] In this embodiment, by using the first plug-in structure and the second plug-in structure to plug together, the plug-in fit between the edge and the frame is achieved, which helps to increase the contact area between the edge and the frame, thereby helping to increase the connection strength between the cover and the frame.

[0035] In one embodiment, the first insertion structure includes a first tooth layer and a second tooth layer. The first tooth layer includes a plurality of first teeth arranged around a preset axis, with a first gap space formed between any two adjacent first teeth. The second tooth layer includes a plurality of second teeth arranged around the preset axis, each second tooth corresponding to a specific first gap space, and each first tooth and each second tooth being spaced apart and offset in a direction parallel to the preset axis. The second insertion structure includes a third tooth layer and a fourth tooth layer. The third tooth layer includes a plurality of third teeth arranged around a preset axis, with a second gap space formed between any two adjacent third teeth. The fourth tooth layer includes a plurality of fourth teeth arranged around a preset axis, each fourth tooth corresponding to a specific second gap space, and each third tooth and each fourth tooth being spaced apart and offset in a direction parallel to the preset axis. The first tooth layer and the second tooth layer in the first insertion structure are matched and inserted into each other with the fourth tooth layer and the third tooth layer in the second insertion structure.

[0036] In this embodiment, the first insertion structure adopts a first tooth layer and a second tooth layer arranged in a staggered manner, and the second insertion structure adopts a third tooth layer and a fourth tooth layer arranged in a staggered manner, so that the first insertion structure and the second insertion structure can be inserted and interlocked with each other, which is beneficial to increasing the connection area between the first insertion structure and the second insertion structure, and beneficial to increasing the contact area between the edge and the frame, thereby increasing the connection strength between the cover and the frame.

[0037] In one embodiment, the thickness of the cover is 0.05mm-50mm; the thickness of the frame is 0.05mm-50mm.

[0038] In this embodiment, the cover and frame body can be made with thin-walled structures, which helps to reduce production costs.

[0039] Secondly, this application provides an energy storage device, including a plurality of battery devices as described above, the battery devices being used to store or provide electrical energy.

[0040] Thirdly, this application provides an energy storage system, including a power conversion device and the aforementioned energy storage device, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0041] Fourthly, this application provides an electrical device, including a battery device, an energy storage device, or an energy storage system as described above, wherein the battery device is used to store or provide electrical energy.

[0042] Fifthly, this application provides a charging network, including a charging pile and the aforementioned energy storage device or energy storage system, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0043] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0046] Figure 2 is an exploded structural diagram of a battery device provided in some embodiments of this application;

[0047] Figure 3 is a schematic diagram of the structure of the cover in a battery device provided in some embodiments of this application;

[0048] Figure 4 is a cross-sectional view AA of Figure 3;

[0049] Figure 5 is a magnified view of position B in Figure 4;

[0050] Figure 6 is a schematic diagram of the three-dimensional structure of Figure 3;

[0051] Figure 7 is a schematic diagram of the structure of the frame in a battery device provided in some embodiments of this application;

[0052] Figure 8 is the second sectional view AA of Figure 3;

[0053] Figure 9 is a partial enlarged view of position C in Figure 8;

[0054] Figure 10 is the third cross-sectional view of GG in Figure 3;

[0055] Figure 11 is a partial enlarged view of position D in Figure 10;

[0056] Figure 12 is a schematic diagram of the three-dimensional structure of Figure 3 (II).

[0057] Figure 13 is a schematic diagram of the three-dimensional structure of Figure 3;

[0058] Figure 14 is a schematic diagram of the structure of the cover in Figure 13;

[0059] Figure 15 is an exploded structural diagram of the battery device provided in some embodiments of this application when the first insertion structure and the second insertion structure are engaged.

[0060] Figure 16 is a second enlarged view of a portion of position D in Figure 10;

[0061] Figure 17 is a partial enlarged view of position D in Figure 10 (third view);

[0062] Figure 18 is a schematic diagram of the structure of the cover in a battery device provided in some embodiments of this application;

[0063] Figure 19 is a partial structural schematic diagram of the flange structure in a battery device provided in some embodiments of this application;

[0064] Figure 20 is a schematic diagram of the structure of the frame in a battery device provided in some embodiments of this application.

[0065] Explanation of reference numerals in the attached drawings: 1000, vehicle; 1100, battery pack; 10, housing; 11, lid; 111, cover; 1111, edge; 11111. 11112, Second edge sub-part; 11113, Edge body; 11114, First insertion structure; 11115, First tooth; 11116, Second tooth; 112, Frame; 1121, Frame body; 11211, First support body; 11212, Second support body; 11213, Edge part; 11214, Second insertion structure; 11215, Third tooth; 11216, Fourth tooth; 11217, Gating platform; 11218, Gating through hole; 1122, Flange structure; 1123, Flange hole; 1124, Flange face; 1125, Groove structure; 12, Box body; 13, Accommodation space; 14, Locking structure; 15, Preset axis; 20, Battery cell assembly; X, Preset direction; 1200, Controller; 1300, Motor. Detailed Implementation

[0066] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0068] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0069] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0070] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0071] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0072] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0073] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0074] A battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via busbars.

[0075] A battery device can be a battery pack, which generally includes a housing and one or more individual battery cells. The individual battery cells are housed within the housing, which encloses and protects them. Typically, the housing has a split structure, consisting of a cover and a body. The cover sits on top of the body, and together they form a storage space within which the individual battery cells are housed.

[0076] In related technologies, the battery case cover is manufactured using a one-piece injection molding method, which makes the cover difficult to manufacture and results in high processing costs, thus affecting the manufacturing cost of the battery device. For example, for battery devices used in vehicles, the volume and dimensions of the casing are relatively large. When using one-piece injection molding during the manufacturing process, a large-tonnage injection molding machine is required. The high cost of large injection molding machines increases the manufacturing cost of the cover, thereby increasing the overall manufacturing cost of the battery device. In addition, the one-piece cover is also difficult to mold during injection molding, and the thickness of the cover formed by one-piece injection molding is relatively large, especially the top part of the cover (corresponding to the cover body of this application), which results in a large weight of the cover, which is not conducive to achieving lightweight battery devices.

[0077] Therefore, this application provides a battery device. In this example, the battery device has a split-type cover structure. The frame and cover of the cover are manufactured separately and then connected and fixed together. The frame and cover are manufactured independently. The cover can be made directly from sheet metal, which can be made directly from finished sheet metal, making the cover easy to obtain and manufacture. The frame is made of injection molded parts, which reduces the requirements for the injection molding machine. The tonnage requirement of the injection molding machine can be relatively reduced, which helps to reduce the manufacturing cost. This, in turn, helps to reduce the requirements for the processing equipment for each part, thereby reducing the cost of the processing equipment and thus reducing the processing cost of the cover. As a result, the overall manufacturing cost of the battery device is reduced.

[0078] Specifically, referring to FIG2, this application embodiment provides a battery device 1100, which includes one or more battery cell assemblies 20. The battery device 1100 disclosed in this application embodiment can be used in electrical devices that use the battery device 1100 as a power source or in various energy storage devices and energy storage systems that use the battery device 1100 as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric toys, power tools, electric vehicles, vehicles 1000, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0079] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0080] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0081] In some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0082] Referring to Figures 2-5, this application embodiment provides a battery device 1100, which includes a battery cell assembly 20 and a housing 10. The housing 10 includes a housing body 12 and a housing cover 11. The housing cover 11 is connected to the housing body 12 and together forms an accommodating space 13, in which the battery cell assembly 20 is housed. The housing cover 11 includes a cover body 111 and a frame body 112. The cover body 111 has an edge portion 1111. The frame body 112 includes a frame body 1121 and a flange structure 1122. The frame body 1121 is disposed around the cover body 111 and connected to the edge portion 1111. The flange structure 1122 is disposed around the frame body 1121 and connected to the frame body 1121. The cover body 111 is a sheet metal, and the frame 112 is an injection molded part.

[0083] For the battery cell assembly 20, the battery cell assembly 20 is usually formed by arranging multiple battery cells. Alternatively, the battery cell assembly 20 can also be a battery module, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0084] A battery cell refers to the smallest unit that makes up the battery device 1100. Each battery cell can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. Battery cells can be cylindrical, flat, cuboid, or other shapes.

[0085] For the housing 10, the housing 10 is used to provide a housing space 13 for the battery cell assembly 20, and the housing 10 can adopt various structures. Specifically, the housing 10 is used to house the battery cell assembly 20, so the housing 10 can include a cover 11 and a body 12. The cover 11 and the body 12 cover each other, and the cover 11 and the body 12 together define the housing space 13 for accommodating the battery cell assembly 20. The body 12 can be a hollow structure with one end open, and the cover 11 can be a plate-like structure. The cover 11 covers the open side of the body 12 so that the cover 11 and the body 12 together define the housing space 13; the cover 11 and the body 12 can also both be hollow structures with one side open, and the open side of the cover 11 covers the open side of the body 12. Of course, the housing 10 formed by the cover 11 and the body 12 can be various shapes, such as a cylinder, a cuboid, etc.

[0086] For the case cover 11, the case cover 11 includes a cover body 111 and a frame body 112, wherein the cover body 111 forms the middle part of the case cover 11, and the cover body 111 can be made of sheet metal. Of course, the cover body 111 can also be made of a separately injection molded part, and the cover body 111 and the frame body 112 are made separately. Since the cover body 111 is a sheet metal, the thickness of the cover body 111 can be made of a relatively thin sheet metal. For example, in related technologies, the minimum thickness of the portion of the case cover corresponding to the cover body 111 in an integrally injection molded case cover is 5 mm. Therefore, in this application, the thickness of the cover body 111 made of sheet metal can be reduced to 0.5 mm, thereby reducing the weight of the case cover 11 and the case body 10, which is beneficial to improving the lightweight of the battery device 1100.

[0087] As shown in Figures 6 and 7, the frame 112 is a ring-shaped frame structure, surrounding the cover 111 to enclose its outer perimeter. The cover 111 has an edge portion 1111 near its edge, which is ring-shaped and can be continuous or discontinuous. The frame 112 surrounds the cover 111 and connects to the edge portion 1111. For example, a ring-shaped connecting plate is formed on the frame 112, and the edge portion 1111 fits or interlocks with the connecting plate, thus creating a sufficient contact area between the edge portion 1111 and the frame 112.

[0088] The frame 112 is made of injection molded material. The frame 112 can be injection molded using an injection molding machine. Since only the frame 112 needs to be injection molded, the tonnage requirement of the injection molding machine can be relatively reduced. For example, in related technologies, if the box lid is a one-piece injection molded part, a 6000-ton injection molding machine is required. However, in this application, by injection molding the frame 112 separately, the required tonnage of the injection molding machine can be reduced to 4000 tons, thereby reducing the requirements for manufacturing equipment and thus helping to reduce processing costs. Separately injection molding the frame 112 also reduces the difficulty of manufacturing the box lid 11, making the box lid 11 easier to manufacture.

[0089] There are several ways to connect the frame 112 and the edge portion 1111. For example, the frame 112 and the edge portion 1111 can be connected by injection molding. It should be noted that this injection molding should be understood as the cover 111 being a pre-formed plate structure. When injection molding the frame 112, the cover 111 can be placed into the mold of the injection molding machine, allowing the frame 112 to be connected to the edge portion 1111 of the cover 111 during molding. Another example is that the frame 112 and the edge portion 1111 can be connected by fusion, forming a fused joint. Yet another example is that the frame 112 and the edge portion 1111 can be bonded together using an adhesive (or glue). Finally, the frame 112 and the edge portion 1111 can be welded together for fixation. For example, the frame 112 and the edge portion 1111 can also be connected by bolts, riveting, or other methods. Of course, the frame 112 and the edge portion 1111 can also be combined using one or more of the above methods.

[0090] For example, when manufacturing the lid 11, the lid 111 can be placed into an injection mold first, then the mold can be closed, and the raw material for manufacturing the frame 112 can be injected into the mold cavity, so that the raw material for the frame 112 and the lid 111 are fused together. The frame 112 and the lid 111 are then cooled and shaped, and the mold can be opened to remove the molded lid 11. Alternatively, the mold can be closed first, the raw material for manufacturing the frame 112 can be injected into the mold cavity, then cooled and shaped, and the frame 112 can be formed by opening the mold. The frame 112 can then be bonded or welded to the lid 111.

[0091] Specifically, referring to Figures 2-7, the frame 112 includes a frame body 1121 and a flange structure 1122. The frame body 1121 is arranged around the cover 111 and connected to the edge portion 1111; the flange structure 1122 is arranged around the frame body 1121 and connected to the frame body 1121. The structure in the frame 112 that is connected to the edge portion 1111 includes at least the frame body 1121. The frame body 1121 can be connected to the edge portion 1111 in the above-mentioned various ways.

[0092] The flange structure 1122 is a structure that assembles the cover 11 and the body 12. The flange structure 1122 is usually an annular plate structure with a certain thickness. Flange holes 1123 are usually provided along the thickness direction of the flange structure 1122. The flange holes 1123 can be through holes or bolt holes. The thickness direction of the flange structure 1122 should be understood as parallel to the preset axis 15 described below. The flange structure 1122 is usually provided with multiple flange holes 1123, which are arranged around the preset axis 15 and spaced apart.

[0093] The frame body 1121 in the frame 112 is connected to the flange structure 1122. The frame body 1121 is located on the side of the flange structure 1122 near the center. That is, the flange structure 1122 surrounds the outer periphery of the frame body 1121 and is connected to the frame body 1121. The frame body 1121 and the flange structure 1122 can be fixedly connected or detachably connected. For example, the frame body 1121 and the flange structure 1122 can be connected by welding, bolting, riveting, or the frame body 1121 and the flange structure 1122 can be integrally formed.

[0094] The side of the frame body 1121 near the edge 1111 is connected to the edge 1111. For example, a connecting plate extends outward from the frame body 1121 toward the edge 1111. The connecting plate is ring-shaped, and the edge 1111 is attached to the surface of the connecting plate and connected to the connecting plate. The frame body 1121 and the edge 1111 can be fused into an integral structure.

[0095] In this embodiment, the lid 11 in the housing 10 is a combination of a lid body 111 and a frame body 112, allowing the lid body 111 and the frame body 112 to be manufactured separately. The lid body 111 is made from a pre-formed sheet material, which can be directly used to manufacture the lid, making it easy to obtain and manufacture. The frame body 112 is an injection molded part, manufactured separately through injection molding. Only the frame body needs to be injection molded, which helps to reduce the requirements for the injection molding machine. The tonnage requirement of the injection molding machine can be relatively reduced, which helps to reduce manufacturing costs. The frame body 112 can be manufactured using lower-cost processing equipment (i.e., an injection molding machine). The lid body 111 and the frame body 112 are then connected. The manufacturing process of the lid 11 does not require large equipment with high processing costs, which helps to reduce processing difficulty and equipment processing costs, thereby reducing the production cost of the resulting lid 11 and battery device 1100. When preparing the box body 10, only the frame 112 needs to be injection molded. When the box cover 11 is processed, only the frame 112 needs clamping force. The cover 111 is a molded sheet material, so no injection molding machine is needed and no clamping force is required. This can significantly reduce the tonnage of the injection molding machine required to manufacture the box cover 11, thereby reducing manufacturing costs.

[0096] In some embodiments, the cover 111 and the frame 112 are made of different materials.

[0097] Specifically, since the lid 11 adopts a combination of a split lid body 111 and a frame body 112, different materials can be used for the lid body 111 and the frame body 112 during manufacturing, making the material selection of the lid body 111 and the frame body 112 more flexible, and the material form and structural form of the lid 11 more varied.

[0098] For example, the cover 111 can be made of a thinner continuous fiber reinforced sheet, which has excellent resistance to deformation and reduces its weight. The frame 112 can be injection molded from long glass fiber reinforced plastic, reducing the tonnage requirement of the injection molding machine to 4000 tons. During the injection molding of the frame 112, the cover 111 and the frame 112 can be connected simultaneously.

[0099] In this embodiment, the cover 111 and the frame 112 are made of different materials, which allows the cover 111 to be made of a material with a smaller thickness. Under the premise of meeting the rigidity and stiffness requirements, the thickness can be reduced as much as possible, thereby helping to reduce the overall weight of the cover and battery device.

[0100] In some embodiments, the cover 111 is a plate structure made of composite material, plastic material, mica material, ceramic material or metal material; the frame 112 is an injection molded part made of polymer material or composite material.

[0101] Specifically, the cover 111 can be made of non-metallic materials such as plastic, composite materials, mica, and ceramic. Of course, the cover 111 can also be made of metallic materials, such as iron, aluminum, stainless steel, and mica sheets. Furthermore, the cover 111 can also be made of continuous fiber reinforced polymer (CFRTP) sheets, plastic sheets, plastic plates, short fiber reinforced plastic sheets, or metal sheets.

[0102] The frame 112 can be injection molded from polymer materials or composite materials. The polymer materials suitable for injection molding are primarily thermoplastic polymers, with some modified thermosetting polymers and elastomers also applicable, such as general-purpose thermoplastics, engineering plastics, special engineering plastics, and thermoplastic elastomers. The composite materials suitable for injection molding mainly use thermoplastic polymers as the matrix, formed by adding reinforcing phases such as fibers, particles, and flakes. These materials retain the processability of the matrix while improving mechanical properties and heat resistance through the reinforcing phases. Examples include fiber-reinforced injection molded composites, particle / powder-reinforced injection molded composites, whisker / flake-reinforced injection molded composites, and thermosetting composite injection molded materials.

[0103] Specifically, for example, the frame 112 can be made of non-metallic materials such as plastic, composite materials, mica, and ceramic. Among these, plastic is a type of polymer material, such as PP (Polypropylene), PA (Polyamide), PPS (Polyphenylene Sulfide), PC (Polycarbonate), and PPE (Polyphenylene Ether). As another example, the frame 112 can be made of long glass fiber reinforced plastic or short glass fiber reinforced plastic (glass fiber length 0-100m).

[0104] In this embodiment, the cover 111 and the frame 112 can be made of different or the same materials, which makes the material selection of the cover 111 and the frame 112 more flexible, and the material form and structural form of the box cover 11 are also more varied.

[0105] In some embodiments, the wall thickness of the cover 111 ranges from 0.05 mm to 50 mm.

[0106] Specifically, the wall thickness of the cover 111 can be any value between 0.05mm and 50mm. For example, the wall thickness of the cover 111 can be 0.05mm, 0.10mm, 0.15mm, 0.20mm, or 0.30mm. The thickness of the cover 111 can be reduced to 0.05mm.

[0107] The frame 112 can be made of plastic, and its wall thickness ranges from 0.05mm to 50mm. Specifically, the wall thickness of the frame body 1121 ranges from 0.05mm to 50mm. A mating surface can be formed between the cover 111 and the frame 112, and the width of this mating surface can be 0%-50% of the width of the cover 111. For example, the cover 111 can adopt a thin-walled structure, so that the thickness of the cover 111 can reach 0.1mm, thereby reducing costs. The cover 111 can also have concave-convex structures or indented structures to enhance its structural strength.

[0108] In this embodiment, the cover 111 can adopt a plate structure with a thinner thickness, thereby forming a lighter cover 11, which is beneficial to achieving the weight reduction of the battery device 1100.

[0109] In some embodiments, as shown in Figures 8 and 9, the flange structure 1122 extends around a preset axis 15 and has a flange surface 1124; the edge portion 1111 extends to the frame body 1121 and overlaps and covers the frame body 1121, so that the edge portion 1111 and the frame body 1121 are attached and connected.

[0110] The preset axis 15 is the surrounding axis or central axis of the flange structure 1122. It can be seen that the thickness direction of the flange structure 1122 is parallel to the preset axis 15. It should be noted that the preset axis 15 is a virtual axis. The preset axis 15 is set to facilitate the description of the relative positional relationship between the frame body 1121 (specifically including the first support body 11211 and the second support body 11212) and the flange structure 1122.

[0111] The frame body 1121 has a surface, which can be understood as the following (the plate surface of the first support 11211 and / or the second support 11212). The edge portion 1111 can extend to the frame body 1121 and overlap and cover the frame body 1121, and be attached to and connected with the surface of the frame body 1121, thereby increasing the connection area between the edge portion 1111 and the frame body 1121, which is beneficial to improving the connection firmness.

[0112] In this embodiment, the edge portion 1111 extends to the frame body 1121 and connects with the frame body 1121. The edge portion 1111 can cover the entire surface of the frame body 1121, thereby increasing the connection area between the edge portion 1111 and the frame body 1121, which is beneficial to improving the connection firmness.

[0113] In some embodiments, as shown in FIG4-7, the frame body 1121 includes a first support 11211 and a second support 11212. The second support 11212 extends around a preset axis 15 and is connected to the flange structure 1122. The second support 11212 protrudes from the flange structure 1122 in a direction parallel to the preset axis 15. The first support 11211 is connected to the protruding end of the second support 11212, and the first support 11211 extends toward the preset axis 15. The edge portion 1111 is connected to the first support 11211.

[0114] In the frame body 1121, the second support body 11212 is arranged around a preset axis 15, and it can be seen that the second support body 11212 is a ring structure. The second support body 11212 is connected to the flange structure 1122, which has an inner ring side and an outer ring side. The second support body 11212 can be connected to the inner ring side of the flange structure 1122. The second support body 11212 extends in a direction parallel to the preset axis 15 and protrudes on one side of the flange structure 1122. It can be considered that the second support body 11212 forms a certain protrusion height on one side of the flange structure 1122. The second support body 11212 has a certain thickness in a direction perpendicular to the preset axis 15. When the thickness of the second support body 11212 is less than the protrusion height, it can be considered that the second support body 11212 is a plate structure; of course, the thickness of the second support body 11212 can also be greater than or equal to the protrusion height.

[0115] The second support 11212 extends from its connection point with the flange structure 1122 in a direction away from the flange structure 1122, forming an extension end. The first support 11211 is connected to this extension end. The first support 11211 extends from its connection point with the second support 11212 in a direction close to the preset axis 15, that is, towards the center of the cover 11, so that the first support 11211 protrudes from the side of the second support 11212 near the center. It can be seen that the first support 11211 is also a ring structure surrounding the preset axis 15. The first support 11211 has a certain extension width in the direction perpendicular to the preset axis 15. The first support 11211 can have a certain thickness in the direction of the preset axis 15. When the thickness of the first support 11211 is less than the extension width, the first support 11211 can be considered as a plate structure; of course, the thickness of the first support 11211 can also be greater than or equal to the extension width. The first support 11211 and the second support 11212 can be connected to form a bent shape. The first support 11211 and the second support 11212 can be fixedly or detachably connected. For example, the first support 11211 and the second support 11212 can be connected by welding or bolting, or the first support 11211 and the second support 11212 can be manufactured by integral molding.

[0116] The first support 11211 has a first connecting surface, which is a plane that fits and connects with the edge portion 1111. Therefore, it can be seen that the first connecting surface is parallel to the surface of the edge portion 1111. For example, the first connecting surface is a plane perpendicular to the preset axis 15. The surface of the edge portion 1111 is opposite to and parallel to the first connecting surface. The edge portion 1111 is fitted and connected with the first connecting surface. A certain pairing or contact area is formed between the edge portion 1111 and the first support 11211. The edge portion 1111 and the first support 11211 can be connected by one or more of the above-mentioned injection molding, melting, welding, bonding and other methods.

[0117] In this embodiment, the frame body 1121 is connected to the flange structure 1122 through the second support body 11212 and to the edge portion 1111 through the first support body 11211, so that the edge portion 1111 and the first support body 11211 form a certain pairing area or contact area, which helps to increase the connection strength between the first support body 11211 and the edge portion 1111, improve the firmness of the connection between the cover 111 and the frame body 112, and improve the resistance to damage of the box cover 11.

[0118] In some embodiments, as shown in Figures 8 and 9, the edge portion 1111 is attached to and connected to the first support body 11211 and the second support body 11212.

[0119] Specifically, the second support body 11212 forms a second connecting surface on the side opposite to the preset axis 15. The second connecting surface is a surface on the second support body 11212. The second connecting surface is located on the side of the second support body 11212 opposite to the preset axis 15. Since the second support body 11212 extends around the preset axis 15, the second connecting surface can be the outer ring surface of the second support body 11212. The outer ring surface is a continuous or discontinuous annular surface. For example, if the second support body 11212 is cylindrical, then the second connecting surface is the outer cylindrical surface or the outer cylindrical surface.

[0120] The edge portion 1111 can extend to the first connecting surface and also to the second connecting surface, and is attached and connected to the first connecting surface and the second connecting surface respectively. The edge portion 1111 can cover all or part of the first connecting surface, and the edge portion 1111 can also cover all or part of the second connecting surface. It can be seen that the edge portion 1111 can cover the first support body 11211 and the second support body 11212, and form a certain contact area with the first support body 11211 and the second support body 11212.

[0121] The edge portion 1111 and the frame body 1121 can also be connected by one or more of the above-mentioned injection molding, melting, welding, bonding and other methods. Using the above methods can improve the connection strength between the edge portion 1111 and the frame body 1121.

[0122] In this embodiment, the edge portion 1111 extends to the second support body 11212, so that the edge portion 1111 can be connected to the second support body 11212 in addition to being connected to the first support body 11211. This increases the connection area between the edge portion 1111 and the frame body 1121, which helps to enhance the connection strength between the edge portion 1111 and the frame body 1121 and improve the damage resistance of the box cover 11.

[0123] In some embodiments, referring to Figures 10 and 11, the edge portion 1111 extends from the frame body 1121 to the flange face 1124, so that the edge portion 1111 is connected to the frame body 1121 and the flange structure 1122.

[0124] Specifically, the edge portion 1111 can not only extend to the frame body 1121 to connect with the frame body 1121, but the edge portion 1111 can also extend through the frame body 1121 to the flange face 1124 of the flange structure 1122, so that the edge portion 1111 can be connected to both the frame body 1121 and the flange structure 1122 at the same time, thereby increasing the connection and assembly area between the cover 111 and the frame body 112.

[0125] In this embodiment, while the edge portion 1111 is connected to the frame body 1121, it can also be connected to the flange structure 1122, thereby increasing the connection and assembly area between the cover 111 and the frame 112, and thus improving the connection strength between the cover 111 and the frame 112.

[0126] In some embodiments, as shown in Figures 8 and 9, the second support 11212 is plate-shaped.

[0127] Specifically, the second support 11212 is fabricated using a plate structure (plate-like structure), forming a cylindrical structure. The preset axis 15 is the central axis of the cylindrical structure. The flange structure 1122 is connected to one end of the cylindrical structure, and the first support 11211 is connected to the other end of the cylindrical structure. The outer ring surface or outer surface of the cylindrical structure is the second connecting surface. The second support 11212 and the flange structure 1122 can be integrally fabricated.

[0128] In this embodiment, the second support 11212 is made of a plate-like structure, which is easy to manufacture and helps to reduce the weight of the cover 11, thus helping to achieve the lightweighting of the battery device 1100.

[0129] In some embodiments, as shown in Figures 8 and 9, the first support 11211 is plate-shaped.

[0130] Specifically, the first support 11211 is manufactured using a plate structure (plate-like structure), forming a sheet-like structure. The plate surface of the first support 11211 can be perpendicular to the preset axis 15. That is, the first support 11211 and the second support 11212 can be connected perpendicularly. The first support 11211 and the second support 11212 are connected and form a vertical bend. For example, the cross-sectional profile of the frame body 1121 in the direction parallel to the preset axis 15 is L-shaped. The first connecting surface can be the upper surface of the first support 11211. Along the preset axis 15, the first support 11211 can be considered to be located above the second support 11212, and the flange structure 1122 is located below the second support 11212. The second support 11212 can be integrally formed with the first support 11211.

[0131] In this embodiment, the first support 11211 is made of a plate-like structure, which is convenient to be made integrally with the second support 11212 and helps to reduce the weight of the cover 11, thus helping to achieve the lightweighting of the battery device 1100.

[0132] In some embodiments, referring to Figures 10 and 11, the edge portion 1111 includes a first edge sub-part 11111 and a second edge sub-part 11112 connected to the first edge sub-part 11111. The first edge sub-part 11111 is attached to and connected to the frame body 1121. The second edge sub-part 11112 extends to the flange face 1124 and is connected to the flange structure 1122.

[0133] For ease of description, the preset axis 15 is set as the vertical axis. Then, the flange face 1124 can be the upper or lower surface of the flange structure 1122. When the flange face 1124 is the lower surface, it can be seen that the edge portion 1111 is connected to the lower surface of the frame body 1121 (that is, the lower surface of the first support 11211 and the inner surface of the second support 11212 on the side close to the preset axis 15). In this example, the flange face 1124 is taken as the upper surface for explanation. Then, it can be seen that the edge portion 1111 is connected to the upper surface of the frame body 1121 (that is, the upper surface of the first support 11211 and the outer surface of the second support 11212 on the side away from the preset axis 15).

[0134] For the edge portion 1111, the edge portion 1111 is divided into two connected parts, namely a first edge sub-part 11111 and a second edge sub-part 11112. The first edge sub-part 11111 is connected to the frame body 1121, and the second edge sub-part 11112 is connected to the flange structure 1122. The first edge sub-part 11111 is attached to and connected to the surface of the frame body 1121, thereby forming a certain connection area between the first edge sub-part 11111 and the frame body 1121. The second edge sub-part 11112 is connected to the flange structure 1122, for example, by attaching the second edge sub-part 11112 to the flange surface 1124, thereby forming a certain connection area between the second edge sub-part 11112 and the flange structure 1122. The first edge sub-part 11111 and the second edge sub-part 11112 can be an integrally formed plate structure.

[0135] The first edge sub-part 11111 and the frame body 1121, as well as the second edge sub-part 11112 and the flange structure 1122, can be connected by one or more of the above-mentioned injection molding, melting, welding, and bonding methods. It should be noted that the second edge sub-part 11112 must avoid the flange hole 1123 opened on the flange structure 1122 so that the second edge sub-part 11112 can avoid the locking structure 14.

[0136] In this embodiment, the edge portion 1111 can be connected to the frame body 1121 and the flange structure 1122 at the same time, thereby increasing the connection area between the edge portion 1111 and the frame body 112. This is beneficial to improving the connection strength and bonding force between the cover 11 and the frame body 112, improving the strength and resistance to damage of the cover 11, and reducing the creep of the flange surface 1124.

[0137] In some embodiments, referring to Figures 10 and 16, the flange structure 1122 has a flange face 1124, and the edge portion 1111 includes a first edge sub-part 11111 and a second edge sub-part 11112 connected to the first edge sub-part 11111. The first edge sub-part 11111 is attached to and connected to the first support body 11211; the second edge sub-part 11112 extends to the flange face 1124 and is connected to the flange structure 1122.

[0138] The structural forms of the flange structure 1122, the first edge sub-part 11111, and the second edge sub-part 11112 are as described in the above embodiments and will not be repeated here. For the frame body 1121 including the first support body 11211 and the second support body 11212, the first edge sub-part 11111 extends along the first connecting surface to achieve the purpose of fitting and connecting with the first support body 11211. The first edge sub-part 11111 and the second connecting surface of the second support body 11212 can be spaced apart, and an adhesive structure, sealing structure, etc. can be provided in the space of the gap; the second edge sub-part 11112 is connected to the flange structure 1122, for example, the second edge sub-part 11112 extends along the flange surface 1124 to achieve the purpose of connecting with the flange structure 1122.

[0139] In some embodiments, referring to Figures 10 and 17, the flange structure 1122 has a flange face 1124, and the edge portion 1111 includes a first edge sub-part 11111 and a second edge sub-part 11112 connected to the first edge sub-part 11111. The first edge sub-part 11111 is attached to and connected to the second support body 11212; the second edge sub-part 11112 extends to the flange face 1124 and is connected to the flange structure 1122.

[0140] The structural forms of the flange structure 1122, the first edge sub-part 11111, and the second edge sub-part 11112 are as described in the above embodiments and will not be repeated here. For the frame body 1121 including the first support body 11211 and the second support body 11212, the first edge sub-part 11111 extends along the second connecting surface to achieve the purpose of fitting and connecting with the second support body 11212; the first edge sub-part 11111 and the first connecting surface of the first support body 11211 can be spaced apart, and an adhesive structure, sealing structure, etc. can be provided in the space of the gap; the second edge sub-part 11112 is connected to the flange structure 1122, for example, the second edge sub-part 11112 extends along the flange surface 1124 to achieve the purpose of connecting with the flange structure 1122.

[0141] In some embodiments, referring to Figures 10 and 11, the flange structure 1122 has a flange face 1124, and the edge portion 1111 includes a first edge sub-part 11111 and a second edge sub-part 11112 connected to the first edge sub-part 11111. The first edge sub-part 11111 is attached to and connected to the first support body 11211 and the second support body 11212. The second edge sub-part 11112 extends to the flange face 1124 and is connected to the flange structure 1122.

[0142] The structural forms of the flange structure 1122, the first edge sub-part 11111, and the second edge sub-part 11112 are as described in the above embodiments and will not be repeated here. For the frame body 1121 including the first support body 11211 and the second support body 11212, the first edge sub-part 11111 extends along the first connecting surface and the second connecting surface to achieve the purpose of fitting and connecting with the first support body 11211 and the second support body 11212; the second edge sub-part 11112 is connected to the flange structure 1122, for example, by extending along the flange surface 1124 to achieve the purpose of connecting with the flange structure 1122.

[0143] At least one of the following can be connected by a combination of one or more of the above-mentioned methods, such as injection molding, melting, welding, and bonding: between the first edge sub-part 11111 and the first support body 11211, between the first edge sub-part 11111 and the second support body 11212, and between the second edge sub-part 11112 and the flange structure 1122. It should be noted that the second edge sub-part 11112 must avoid the flange hole 1123 opened on the flange structure 1122 so that the second edge sub-part 11112 can avoid the locking structure 14.

[0144] In this embodiment, the edge portion 1111 can be connected to the first support body 11211 and the second support body 11212, and can also be connected to the flange structure 1122, thereby increasing the connection area between the edge portion 1111 and the frame 112. This helps to improve the connection strength between the cover 11 and the frame 112, improve the strength and resistance to damage of the cover 11, and help to reduce the creep of the flange surface 1124.

[0145] In some embodiments, as shown in FIG12, a plurality of flange holes 1123 are provided on the flange structure 1122, which are arranged around a preset axis 15 and spaced apart from each other; the second edge sub-part 11112 includes a plurality of edge bodies 11113, which are all connected to the first edge sub-part 11111. Each edge body 11113 is connected to the flange structure 1122. The plurality of edge bodies 11113 are arranged around the preset axis 15 and spaced apart from each other, and the edge bodies 11113 avoid the flange holes 1123.

[0146] Specifically, the second edge sub-part 11112 adopts a discontinuous structural form. The second edge sub-part 11112 includes a plurality of edge bodies 11113 arranged at intervals. Each edge body 11113 is connected to the first edge sub-part 11111. The first edge sub-part 11111 and each edge body 11113 can be manufactured by integral molding. Each edge body 11113 is arranged at intervals around a preset axis 15. Each edge body 11113 is connected to the flange structure 1122. For example, if each edge body 11113 is plate-shaped or sheet-shaped, then each edge body 11113 is attached to the flange surface 1124 of the flange structure 1122.

[0147] The outer contour shape of the flange structure 1122 in the plane perpendicular to the preset axis 15 can be circular, elliptical, or polygonal. Multiple flange holes 1123 are arranged around the preset axis 15 and spaced apart on the flange structure 1122. Since the flange holes 1123 are connected to the locking structure 14 (see below), each edge body 11113 should avoid the flange holes 1123 so that the locking structure 14 does not interfere with the edge body 11113.

[0148] In this embodiment, the second edge sub-part 11112 adopts a structure in which multiple edge bodies 11113 are arranged at intervals, thereby enabling the second edge sub-part 11112 to avoid the flange hole 1123 on the flange structure 1122, and helping to reduce the weight of the second edge sub-part 11112, so as to achieve the lightweighting of the box cover 11.

[0149] In some embodiments, as shown in Figures 12, 18 and 19, the flange structure 1122 has a flange face 1124, and a plurality of groove structures 1125 are provided on the flange face 1124 of the flange structure 1122. Each edge body 11113 is inserted into the groove structure 1125, so that the upper surface of each edge body 11113 is flush with the flange face 1124.

[0150] When the edge body 11113 is fitted to the flange structure 1122, the edge body 11113 can be directly fitted to the flange surface 1124, so that the edge body 11113 protrudes on the flange surface 1124.

[0151] In this example, each edge body 11113 is flush with the flange face 1124, so that the flange face 1124 and the surface of the edge body 11113 form a plane. For example, corresponding to the position of each edge body 11113, a groove structure 1125 is opened on the flange face 1124, so that the edge body 11113 is inserted into and accommodated in the groove structure 1125, and the upper surface of the edge body 11113 is kept flush with the flange face 1124.

[0152] In this embodiment, the upper surface of each edge body 11113 is flush with the flange face 1124, which helps to improve the overall appearance consistency of the flange face 1124.

[0153] In some embodiments, as shown in FIG13-15, the edge portion 1111 is flat and includes a first insertion structure 11114. An edge portion 11213 is formed on the frame body 1121 (specifically the first support body 11211), and the edge portion 11213 includes a second insertion structure 11214. The first insertion structure 11114 and the second insertion structure 11214 are inserted and engaged.

[0154] Specifically, the position near the edge of the frame 112 refers to the position near the edge portion 1111 of the frame 112. The edge portion 11213 is a part of the frame 112. For example, the edge portion 11213 is the edge portion near the edge portion 1111 of the frame body 1121 (specifically the first support body 11211). Since the edge portion 1111 is ring-shaped, the edge portion 11213 of the frame 112 is also ring-shaped. The edge portion 11213 is arranged around the preset axis 15. When the cover 111 is connected to the frame 112, it is achieved by connecting the edge portion 1111 and the edge portion 11213.

[0155] The first plug-in structure 11114 can be a protruding structure, and correspondingly, the second plug-in structure 11214 is a groove structure, with the protruding structure and the groove structure plugging and mating together.

[0156] Optionally, the first plug-in structure 11114 can also be a slot structure, and correspondingly, the second plug-in structure 11214 is a protrusion structure, which is plugged into and cooperates with the slot structure.

[0157] Furthermore, multiple slot structures and protrusion structures can be matched to form multiple insertion parts between the first insertion structure 11114 and the second insertion structure 11214, thereby increasing the contact area between the edge portion 1111 and the frame 112.

[0158] The first insertion structure 11114 and the second insertion structure 11214 can be connected by one or more of the above-mentioned methods, such as injection molding, melting, welding, and bonding.

[0159] In this embodiment, by using the first plug-in structure 11114 and the second plug-in structure 11214 to plug into each other, the plug-in fit between the edge portion 1111 and the frame 112 is realized, which helps to increase the contact area between the edge portion 1111 and the frame 112, thereby helping to increase the connection strength between the cover 111 and the frame 112.

[0160] In some embodiments, referring to FIG15, the first insertion structure 11114 includes a first tooth layer and a second tooth layer. The first tooth layer includes a plurality of first teeth 11115 arranged circumferentially and spaced apart, with a first gap space formed between any two adjacent first teeth 11115. The second tooth layer includes a plurality of second teeth 11116 arranged circumferentially along a preset axis 15, with each second tooth 11116 corresponding to a first gap space. Each first tooth 11115 and each second tooth 11116 are spaced apart and staggered in a direction parallel to the preset axis 15. The second insertion structure 11214 includes a third tooth layer and The fourth tooth layer includes multiple third tooth bodies 11215 arranged around a preset axis 15, with a second interval space formed between any two adjacent third tooth bodies 11215. The fourth tooth layer includes multiple fourth tooth bodies 11216 arranged around a preset axis 15, with each fourth tooth body 11216 corresponding to each second interval space. Each third tooth body 11215 and each fourth tooth body 11216 are spaced apart and staggered in a direction parallel to the preset axis 15. The first tooth layer and the second tooth layer in the first insertion structure 11114 are matched and inserted into each other with the fourth tooth layer and the third tooth layer in the second insertion structure 11214.

[0161] Specifically, the direction of circumference along the preset axis 15 is the circumferential direction of the cover 11. The circumferential direction is a circumferential direction. The direction of circumference along the preset axis 15 refers to the circumferential direction of the edge portion 1111. Therefore, it can be known that the extension path of the edge portion 1111 is a ring path. This ring path is in a plane perpendicular to the preset axis 15. Taking the ring path as a rectangle as an example, any side length direction of the rectangle is defined as the preset direction X. The preset direction X can be understood as the extension length direction of one side of the edge portion 1111. The rectangle has four side lengths. Correspondingly, the edge portion 1111 includes four parts. Each of the four parts of the edge portion 1111 includes a first insertion structure 11114, that is, a first tooth layer and a second tooth layer. Therefore, it can be known that the extension path of the first tooth layer and the second tooth layer is a ring path. Correspondingly, the edge portion 11213 includes four parts (or four side lengths), and each of the four parts of the edge portion 11213 includes a second insertion structure 11214, that is, a third tooth layer and a fourth tooth layer. It can be seen that the extension paths of the third tooth layer and the fourth tooth layer are also circular paths.

[0162] For the first tooth layer, the first tooth layer includes a plurality of first tooth bodies 11115, which are arranged around a preset axis 15 and spaced apart. A first gap space is formed between two adjacent first tooth bodies 11115. The first tooth bodies 11115 may be in the form of a sheet. For the second tooth layer, the second tooth layer includes a plurality of second tooth bodies 11116, which are arranged around a preset axis 15 and spaced apart. A third gap space is formed between two adjacent second tooth bodies 11116. The second tooth bodies 11116 may be in the form of a sheet. Each second tooth 11116 corresponds to a first space, and similarly, each first tooth 11115 corresponds to a second space. The first teeth 11115 and the second teeth 11116 are arranged at intervals and staggered along (or parallel to) the preset axis 15, such that the first teeth 11115 and the second teeth 11116 form an interval or staggered distance in the direction parallel to the preset axis 15. Therefore, the multiple first teeth 11115 and the multiple second teeth 11116 form an alternating staggered meshing tooth structure in the circumferential direction.

[0163] For the third tooth layer, the third tooth layer includes a plurality of third tooth bodies 11215, which are arranged around a preset axis 15 and spaced apart. A second space is formed between two adjacent third tooth bodies 11215. The third tooth bodies 11215 may be in the form of plates. For the fourth tooth layer, the fourth tooth layer includes a plurality of fourth tooth bodies 11216, which are arranged around a preset axis 15 and spaced apart. A fourth space is formed between two adjacent fourth tooth bodies 11216. The fourth tooth bodies 11216 may be in the form of plates. Each fourth tooth 11216 corresponds to a second space, and similarly, each third tooth 11215 corresponds to a fourth space. The third teeth 11215 and fourth teeth 11216 are arranged in a staggered manner along (or parallel to) the preset axis 15, creating a spacing or staggered distance between them in the direction parallel to the preset axis 15. It can be seen that the staggered distance between the third teeth 11215 and fourth teeth 11216 can be the same as the staggered distance between the first teeth 11115 and second teeth 11116. Multiple third teeth 11215 and multiple fourth teeth 11216 form an alternating staggered meshing tooth structure in the circumferential direction. The surfaces of the connecting parts formed after the first plug-in structure 11114 and the second plug-in structure 11214 are plugged in can be flush, thereby improving the consistency of the connection position between the cover 111 and the frame 112, and making the appearance flatter and more beautiful.

[0164] Therefore, referring to Figure 15, when the first insertion structure 11114 and the second insertion structure 11214 are inserted, the first tooth layer and the second tooth layer will match and insert with the fourth tooth layer and the third tooth layer, thus forming a mutually interlocking structure. The positions where the first tooth body 11115 and the second tooth body 11116 are connected to the third tooth body 11215 and the fourth tooth body 11216 respectively can be connected by one or more of the above-mentioned injection molding, melting, welding, and bonding methods.

[0165] In this embodiment, the first insertion structure 11114 adopts a first tooth layer and a second tooth layer arranged in a staggered manner, and the second insertion structure 11214 adopts a third tooth layer and a fourth tooth layer arranged in a staggered manner, so that the first insertion structure 11114 and the second insertion structure 11214 can be inserted and engaged with each other, which is beneficial to increasing the connection area between the first insertion structure 11114 and the second insertion structure 11214, and beneficial to increasing the contact area between the edge portion 1111 and the frame 112, thereby increasing the connection strength between the cover 111 and the frame 112.

[0166] In some embodiments, as shown in FIG2, the housing 10 further includes a locking structure 14, which is connected between the flange structure 1122 and the housing body 12.

[0167] Specifically, the frame body 1121 has a structure that mates with the flange structure 1122. Generally, the frame body 1121 is provided with a corresponding opposing flange that matches the flange structure 1122. Corresponding to the flange hole 1123 on the flange structure 1122, the opposing flange is provided with a corresponding flange hole 1123, so that the flange structure 1122 and the opposing flange fit together. The locking structure 14 is connected between the flange structure 1122 and the opposing flange, thereby realizing the connection and fixation between the cover 11 and the body 12. The locking structure 14 can be a bolt assembly, etc. The bolt assembly is matched and connected to the flange hole 1123 on the flange structure 1122 and the flange hole on the opposing flange on the frame body 1121, respectively. The locking structure 14 realizes the detachable connection between the cover 11 and the body 12.

[0168] In this embodiment, the frame 112 is assembled with the box body 12 through the flange structure 1122, and the frame 112 and the box body 12 are fixed through the locking structure 14. The edge part 1111 is connected and assembled with the frame body 1121 in the frame 112, so that the edge part 1111 can avoid the flange structure 1122 and does not affect the connection and assembly of the flange structure 1122 and the box body 12. The overall structural design is more reasonable.

[0169] In some embodiments, as shown in FIG20, the frame 112 further includes a plurality of gating platforms 11217 all connected to the first support 11211. The gating platforms 11217 extend from the side edge of the first support 11211 away from the second support 11212 in a direction close to the preset axis 15. The plurality of gating platforms 11217 are distributed at intervals around the preset axis 15. The gating platforms 11217 have injection through holes 11218. The gating platforms 11217 are attached to and connected to the edge portion 1111.

[0170] Specifically, since the gate platform 11217 extends from the edge of the first support 11211 toward the preset axis 15, and multiple gate platforms 11217 are distributed around the axis, the position of the injection through hole 11218 must correspond precisely to the injection port of the mold cavity to ensure that the melt can fill each target area according to the design path.

[0171] The gating platform 11217 is a protruding structure that extends beyond the first support 11211 on the side away from the second support 11212. The gating platform 11217 can be a protruding sheet-like structure. The gating platform 11217 can increase the width of a local area on the first support 11211, thereby facilitating the setting of the gating through hole 11218.

[0172] The gating platform 11217 is attached and connected to the cover 111. The gating hole 11218 is located on the gating platform 11217 to reduce the excessive impact on the strength of the first support 11211. If the gating hole 11218 were directly located on the main body of the first support 11211, a stress concentration area might form around the gating hole 11218, reducing the overall strength and reliability of the product. The gating platform 11217, as a transition structure, can minimize the impact of the gating hole 11218 on the first support 11211, while also ensuring the connection strength between the gating and the cover 111, making the cover 11 less prone to cracking during subsequent use.

[0173] The first support 11211 has a structure that is widened locally to the inward side to form a local gate platform 11217, which is conducive to the arrangement of the gate (i.e. the injection through hole 11218) and facilitates mold design and injection molding process.

[0174] In this embodiment, by connecting the gating platform 11217 to the first support 11211, it is easier to arrange the gating through hole 11218, which helps to improve the connection between the cover 111 and the first support 11211.

[0175] In some specific embodiments, referring to Figures 1-15, the battery device 1100 includes a battery cell assembly 20 and a housing 10. The housing 10 includes a housing body 12 and a housing cover 11. The housing cover 11 is connected to the housing body 12 and together forms an accommodating space 13, within which the battery cell assembly 20 is housed. The housing cover 11 includes a cover body 111 and a frame body 112. The cover body 111 has an edge portion 1111. The frame body 112 includes a frame body 1121 and a flange structure 1122. The frame body 1121 surrounds the cover body 111 and is connected to the edge portion 1111. The flange structure 1122 surrounds the frame body 1121 and is connected to the frame body 1121. The cover body 111 is made of sheet metal, and the frame 112 is an injection-molded part. The body 111 and the frame 112 are made of different materials; the cover 111 is a plate structure made of composite material, plastic material, mica material, ceramic material or metal material; the frame 112 is an injection molded part made of polymer material or composite material; the flange structure 1122 extends around the preset axis 15, and the flange structure 1122 has a flange surface 1124; the edge portion 1111 extends to the frame body 1121 and overlaps and covers the frame body 1121, so that the edge portion 1111 and the frame body 1121 are attached and connected; the frame body 1121 includes a first support body 11211 and a second support body 11212, the second support body 11212 extends around the preset axis 15 and is connected to the flange structure 1122. Along a direction parallel to the preset axis 15, the second support body 11212 protrudes from the flange structure 1122; the first support body 11211 is connected to the protruding end of the second support body 11212, and the first support body 11211 extends toward the preset axis 15, and the first support body 11211 is connected to the edge portion 1111; the edge portion 1111 is connected to both the first support body 11211 and the second support body 11212; the flange structure 1122 has a flange face 1124, and the edge portion 1111 includes a first edge sub-part 11111 and a second edge sub-part 11112 connected to the first edge sub-part 11111, the first edge sub-part 11111 being attached and connected to the frame body 1121; the second edge sub-part... Part 11112 is connected to flange structure 1122; flange structure 1122 has multiple flange holes 1123 that are spaced apart and surround a preset axis 15; second edge subpart 11112 includes multiple edge bodies 11113 that are all connected to first edge subpart 11111, each edge body 11113 is connected to flange structure 1122, the multiple edge bodies 11113 surround a preset axis 15 and are spaced apart, and the edge bodies 11113 avoid flange holes 1123; flange face 1124 of flange structure 1122 has multiple groove structures 1125, each edge body 11113 is inserted into the groove structure 1125, so that the upper surface of each edge body 11113 is flush with flange face 1124;When the edge portion 1111 is flat, the edge portion 1111 includes a first insertion structure 11114, and an edge portion 11213 is formed on the first support body 11211. The edge portion 11213 includes a second insertion structure 11214, and the first insertion structure 11114 and the second insertion structure 11214 are inserted into each other. The first insertion structure 11114 includes a first tooth layer and a second tooth layer. The first tooth layer includes a plurality of first teeth 11115 arranged circumferentially and spaced apart. A first gap space is formed between any two adjacent first teeth 11115. The second tooth layer includes a plurality of second teeth 11116 arranged circumferentially along a preset axis 15. Each second tooth 11116 is arranged corresponding to each first gap space. Each first tooth 11115 and each second tooth 11116 are in a direction parallel to the preset axis 15. The first and second toothed layers of the first insertion structure 11214 are interlocked and staggered; the second insertion structure 11214 includes a third toothed layer and a fourth toothed layer. The third toothed layer includes multiple third toothed bodies 11215 arranged around a preset axis 15, with a second gap space formed between any two adjacent third toothed bodies 11215. The fourth toothed layer includes multiple fourth toothed bodies 11216 arranged around a preset axis 15, with each fourth toothed body 11216 corresponding to each second gap space. Each third toothed body 11215 and each fourth toothed body 11216 are interlocked and staggered in a direction parallel to the preset axis 15. The first toothed layer and the second toothed layer in the first insertion structure 11114 are matched and interlocked with the fourth toothed layer and the third toothed layer in the second insertion structure 11214. The thickness of the cover 111 is 0.05mm-50mm; the thickness of the frame body 1121 is 0.05mm-50mm.

[0176] According to some embodiments of this application, this application also provides an energy storage device, which includes a power conversion device and the energy storage device in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0177] Specifically, the energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices 1100, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0178] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0179] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0180] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0181] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0182] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1100 via piping to regulate the temperature of the individual battery cells.

[0183] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0184] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as the Insulation Monitoring Module (IMM), the Master Battery Management Unit (MBMU), the Ethernet (ETH) module, and the fiber optic conversion module.

[0185] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0186] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0187] According to some embodiments of this application, this application also provides an energy storage system, which includes a power conversion device and an energy storage device as described in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0188] In some embodiments, the energy storage system may include one or more energy storage devices and a power conversion system (PCS), wherein the power conversion system is used to connect the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power conversion system. As examples, the power generation device may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0189] According to some embodiments of this application, referring to FIG1, this application also provides an electrical device, which includes the battery device 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments. The battery device 1100 is used to store or provide electrical energy.

[0190] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0191] The examples of electrical devices in this application are based on the examples of the battery device 1100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 1100 described above, and will not be repeated here.

[0192] According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0193] For example, the charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to a battery unit 1100 in the energy storage devices via cables. The battery unit 1100 can provide its stored electrical energy to the charging stations. The charging stations have one or more connectors for connecting to electrical devices (such as vehicle 1000) to replenish their power.

[0194] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0195] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A battery device (1100), characterized in that, include: Battery cell assembly (20); The enclosure (10) includes a body (12) and a cover (11). The cover (11) is connected to the body (12) and together they enclose a receiving space (13). The battery cell assembly (20) is housed in the receiving space (13). The cover (11) includes a cover body (111) and a frame body (112). The cover body (111) has an edge portion (1111). The frame body (112) includes a frame body (1121) and a flange structure (1122). The frame body (1121) surrounds the cover body (111) and is connected to the edge portion (1111). The flange structure (1122) surrounds the frame body (1121) and is connected to the frame body (1121). The cover body (111) is a sheet metal, and the frame body (112) is an injection molded part.

2. The battery device (1100) as claimed in claim 1, characterized in that, The cover (111) and the frame (112) are made of different materials.

3. The battery device (1100) as claimed in claim 1, characterized in that, The cover (111) is a plate structure made of composite material, plastic material, mica material, ceramic material or metal material; the frame (112) is an injection molded part made of polymer material or composite material.

4. The battery device (1100) according to any one of claims 1-3, characterized in that, The flange structure (1122) extends around the preset axis (15) and has a flange face (1124); the edge portion (1111) extends to the frame body (1121) and overlaps and covers the frame body (1121), so that the edge portion (1111) and the frame body (1121) are attached and connected.

5. The battery device (1100) as claimed in claim 4, characterized in that, The frame body (1121) includes a first support (11211) and a second support (11212). The second support (11212) extends around the preset axis (15) and is connected to the flange structure (1122). The second support (11212) protrudes from the flange structure (1122) in a direction parallel to the preset axis (15). The first support (11211) is connected to the protruding end of the second support (11212), and the first support (11211) extends toward the preset axis (15). The edge portion (1111) is attached to and connected to the first support (11211) and the second support (11212).

6. The battery device (1100) as claimed in claim 4, characterized in that, The edge portion (1111) extends from the frame body (1121) to the flange face (1124), so that the edge portion (1111) is connected to both the frame body (1121) and the flange structure (1122).

7. The battery device (1100) as claimed in claim 6, characterized in that, The edge portion (1111) includes a first edge sub-part (11111) and a second edge sub-part (11112) connected to the first edge sub-part (11111). The first edge sub-part (11111) is attached to and connected to the frame body (1121). The second edge sub-part (11112) extends to the flange face (1124) and is connected to the flange structure (1122).

8. The battery device (1100) as claimed in claim 5, characterized in that, The edge portion (1111) includes a first edge sub-part (11111) and a second edge sub-part (11112) connected to the first edge sub-part (11111). The first edge sub-part (11111) is attached to and connected to the first support body (11211) and the second support body (11212). The second edge sub-part (11112) extends to the flange face (1124) and is connected to the flange structure (1122).

9. The battery device (1100) as claimed in claim 5, characterized in that, The frame (112) also includes a plurality of gating platforms (11217) connected to the first support (11211). The gating platform (11217) extends from the side edge of the first support (11211) away from the second support (11212) toward the direction close to the preset axis (15). The plurality of gating platforms (11217) are distributed at intervals around the preset axis (15). The gating platform (11217) has a gating through hole (11218). The gating platform (11217) is attached to and connected to the edge portion (1111).

10. The battery device (1100) as claimed in claim 5, characterized in that, Both the first support (11211) and the second support (11212) are plate-shaped.

11. The battery device (1100) as claimed in claim 7 or 8, characterized in that, The flange structure (1122) has a plurality of flange holes (1123) that are arranged around the preset axis (15) and spaced apart from each other; the second edge sub-part (11112) includes a plurality of edge bodies (11113) that are all connected to the first edge sub-part (11111), each edge body (11113) is connected to the flange structure (1122), the plurality of edge bodies (11113) are arranged around the preset axis (15) and spaced apart from each other, and the edge bodies (11113) avoid the flange holes (1123).

12. The battery device (1100) as claimed in claim 11, characterized in that, The flange structure (1122) has a flange face (1124), and a plurality of groove structures (1125) are provided on the flange face (1124) of the flange structure (1122). Each edge body (11113) is inserted into the groove structure (1125), so that the upper surface of each edge body (11113) is flush with the flange face (1124).

13. The battery device (1100) according to any one of claims 1-3, characterized in that, The edge portion (1111) is flat and includes a first insertion structure. An edge portion (11213) is formed on the frame body (1121) and includes a second insertion structure. The first insertion structure and the second insertion structure are inserted and engaged.

14. The battery device (1100) as claimed in claim 13, characterized in that, The first insertion structure (11114) includes a first tooth layer and a second tooth layer. The first tooth layer includes a plurality of first tooth bodies (11115) arranged around a preset axis (15), with a first gap space formed between any two adjacent first tooth bodies (11115). The second tooth layer includes a plurality of second tooth bodies (11116) arranged around the preset axis (15), with each second tooth body (11116) corresponding to each of the first gap spaces. Each first tooth body (11115) and each second tooth body (11116) are spaced apart and staggered in a direction parallel to the preset axis (15). The second insertion structure (11214) includes a third tooth layer and a fourth tooth layer. The third tooth layer includes... Multiple third teeth (11215) are arranged around the preset axis (15), and a second interval space is formed between any two adjacent third teeth (11215). The fourth tooth layer includes multiple fourth teeth (11216) arranged around the preset axis (15). Each fourth tooth (11216) is arranged corresponding to each second interval space. Each third tooth (11215) and each fourth tooth (11216) are spaced apart and staggered in a direction parallel to the preset axis (15). The first tooth layer and the second tooth layer in the first insertion structure (11114) are matched and inserted into each other with the fourth tooth layer and the third tooth layer in the second insertion structure (11214).

15. The battery device (1100) according to any one of claims 1-3, characterized in that, The thickness of the cover (111) is 0.05mm-50mm.

16. An energy storage device, characterized in that, It includes a plurality of battery devices (1100) as described in any one of claims 1-15, the battery devices (1100) being used to store or provide electrical energy.

17. An energy storage system comprising a power conversion device and an energy storage device as claimed in claim 16, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

18. An electrical device comprising a battery device (1100) as claimed in any one of claims 1-15, an energy storage device as claimed in claim 16, or an energy storage system as claimed in claim 17, wherein the battery device (1100) is used to store or provide electrical energy.

19. A charging network comprising a charging pile and an energy storage device as claimed in claim 16 or an energy storage system as claimed in claim 17, the energy storage device being used to provide electrical energy to the charging pile.

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