Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a box body, the box body comprises a frame and a panel, the panel forms a first joint structure, the frame is connected with the first joint structure so as to be fixed with the panel, and the first joint structure is a local convex structure or a local concave structure; the panel is of an integrated structure. According to the structure, the first joint structure of the panel is locally raised or locally recessed, so that the connection area between the frame and the panel can be increased, the connection strength between the frame and the panel can be improved, and the structural stability of the box body is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery device and an electrical device using the same. Background Art

[0002] The battery device includes a box body for placing and protecting battery cells. Among them, the related art provides a box body including a frame and a panel, and the frame and the panel are fixed together by welding. In the related art, there are problems of low connection strength between the frame and the panel and poor structural stability of the box body. Summary of the Utility Model

[0003] In view of the above problems, this application provides a battery device and an electrical device using the same. In this battery device, the joint surface between the panel and the frame is non-planar, which can improve the connection strength between the frame and the panel and increase the structural stability of the box body.

[0004] To solve the above technical problems, one technical solution adopted in this application is to provide a battery device. The battery device includes a box body, the box body includes a frame and a panel, the panel forms a first joint structure, and the frame is connected to the first joint structure to be fixed to the panel. The first joint structure is a locally convex structure or a locally concave structure; the panel is an integral structure.

[0005] In the above structure, the first joint structure of the panel is locally convex or locally concave, which can increase the connection area between the frame and the panel, thereby improving the connection strength between the frame and the panel and increasing the structural stability of the box body.

[0006] In a possible implementation manner, the frame has a second joint structure, and the second joint structure is connected to the first joint structure; wherein, the first joint structure is one of the locally convex structure and the locally concave structure, and the second joint structure is the other of the locally convex structure and the locally concave structure.

[0007] In the above, the first joint structure and the second joint structure are joined, and their joint surface is not planar, which can increase the joint area.

[0008] In a possible implementation manner, the first joint structure includes: a first joint body;

[0009] a first connecting portion, the first connecting portion is disposed on the side surface of the first joint body, and the first connecting portion has a first inclined surface, and the first inclined surface is disposed at an angle with the side surface of the first joint body.

[0010] By setting the side surface of the first joint body at an angle with the first inclined surface, the connection area with the frame can be increased.

[0011] In a possible implementation, the angle between the side surface of the first engaging body and the first inclined surface is an obtuse angle.

[0012] As described above, the obtuse angle between the side surface of the first engaging body and the first inclined surface can reduce stress concentration after connection with the frame.

[0013] In a possible implementation, the frame includes: a frame body; the second engaging structure is provided on one side of the frame body, and the second engaging structure has a second inclined surface, and the second inclined surface is arranged at an angle with the surface of the frame body; wherein, the first inclined surface is engaged with the second inclined surface, and the side surface of the first engaging body is engaged with the surface of the frame body.

[0014] As described above, the frame can be engaged with the panel.

[0015] In a possible implementation, the panel further includes: a fixing portion, and the fixing portion extends from the side surface of the panel to the surface of the frame and is connected to the surface of the frame.

[0016] The fixing portion of the panel is connected to the surface of the frame, which can further increase the connection area between the panel and the frame and improve the fixing strength between the panel and the frame.

[0017] In a possible implementation, the frame encloses to form a receiving cavity, and the panel is located on one side of the receiving cavity; the box body further includes: a structural beam, and the structural beam is located in the receiving cavity, and the structural beam is connected to the frame.

[0018] As described above, the structural beam can play a role in supporting and fixing the battery cells.

[0019] In a possible implementation, a relief groove is formed by concave inward on one side of the structural beam connected to the frame, and at least a part of the fixing portion is located in the relief groove.

[0020] As described above, the structural beam can avoid the fixing portion by forming the relief groove, so that the size of the fixing portion can be larger.

[0021] In a possible implementation, the first engaging structure has an engaging surface in a curved surface shape or a curved surface shape.

[0022] As described above, both the curved surface shape and the curved surface shape of the engaging surface can increase the area of the engaging surface.

[0023] In a possible implementation, the panel is a die-cast panel.

[0024] The die-cast panel has high strength.

[0025] In a possible implementation, the frame is welded to the first engaging structure.

[0026] Welding has good airtightness and high connection strength.

[0027] To solve the above technical problems, another technical solution adopted by this application is to provide an electrical device, which includes a battery device. The battery device is the above-mentioned battery device and is used to provide electrical energy.

[0028] In the above electrical device, the first engaging structure of the panel is locally convex or locally concave, which can increase the connection area between the frame and the panel, thereby improving the connection strength between the frame and the panel and increasing the structural stability of the box body.

[0029] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the specific implementation manners of this application are specifically given below. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of a vehicle according to one or more embodiments;

[0032] Figure 2 It is a schematic connection structure diagram of the frame and the panel in the box body according to one or more embodiments;

[0033] Figure 3 It is Figure 2 a schematic structural diagram of the panel in

[0034] Figure 4 It is Figure 2 a schematic structural diagram of the frame in

[0035] Figure 5 It is a schematic connection structure diagram of the frame and the panel in the box body according to another one or more embodiments;

[0036] Figure 6 It is an exploded schematic structural diagram of the conductive connecting member in the box body according to yet another one or more embodiments;

[0037] Figure 7Exploded structural view of a conductive connector according to yet another or yet multiple other embodiments;

[0038] Figure 8 Exploded structural view of a conductive connector according to still another or still multiple other embodiments;

[0039] Figure 9 Structural view of a battery cell according to one or more embodiments.

[0040] Wherein, vehicle 1000; controller 200; motor 300; battery device 100; battery cell 110; panel 10; first engagement structure 11; first engagement body 111; first connection portion 112; fixing portion 113; first inclined surface 1121; frame 20; frame body 21; second engagement structure 22; second inclined surface 221; structural beam 30; avoidance groove 31. Detailed implementation manners

[0041] Embodiments of the technical solution of the present application will be described in detail below. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, unless otherwise specifically defined, the term "multiple" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0044] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0046] In the description of the embodiments of the present application, for technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "linkage", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0048] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation means such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of batteries, the market demand is also continuously increasing.

[0049] Among them, the battery device includes a box body, and the box body is used to place and protect battery monomers. Among them, the related technology provides a box body, which includes a frame and a panel, and the frame and the panel are fixed together by welding. In the related technology, there are problems such as low connection strength between the frame and the panel and poor structural stability of the box body.

[0050] Based on the above considerations, in order to solve the technical problems of low connection strength between the frame and the panel and poor structural stability of the box body in the prior art, the present application proposes a battery device and an electrical device. The panel of the battery device is formed with a first joint structure with local protrusions or local recesses, which can increase the connection area between the panel and the frame.

[0051] For the convenience of description, the following embodiments will take an electrical device in an embodiment of the present application as a vehicle as an example for illustration.

[0052] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle according to one or more embodiments.

[0053] The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0054] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0055] To improve the performance of the electrical device, the present application provides a battery device and an electrical device. Please refer to Figure 2 , Figure 6 and Figure 9 , Figure 2 which is a schematic structural diagram of the connection structure between the frame and the panel in a box according to one or more embodiments; Figure 6 which is an exploded structural diagram of the conductive connector in the box according to another or more embodiments; Figure 9 which is a schematic structural diagram of a battery cell according to one or more embodiments.

[0056] In some embodiments, the battery device 100 includes a box, and the box includes a frame 20 and a panel 10. The panel 10 forms a first engaging structure 11, and the frame 20 is connected to the first engaging structure 11, thereby being fixed to the panel 10. The first engaging structure 11 is a locally convex structure or a locally concave structure; the panel 10 is an integrated structure.

[0057] The battery device 100 further includes one or more battery cells 110, and the box body functions to protect and accommodate the battery cells 110. In this embodiment, the number of the frames 20 is multiple, and the multiple frames 20 enclose to form a receiving cavity. The number of the panels 10 is two, and the two panels 10 respectively cover the openings on both sides of the receiving cavity to define a receiving space, and the battery cells 110 are located in the receiving space. In this embodiment, the multiple frames 20 are fixedly welded to enclose and form the receiving cavity. In some other embodiments, the number of the frames 20 can also be one. When the number of the frames 20 is one, the frame 20 is a basin-shaped structure with a hollow middle part and has a receiving cavity. The integrated frame 20 can be manufactured by stamping, die-casting, etc. A related technology proposes a battery device 100. In the related technology, the panel 10 is butt-joined and fixed to the frame 20, and the joint surface between the panel 10 and the frame 20 is a plane. Since the thickness of the frame 20 or the panel 10 is small, the joint area between the panel 10 and the frame 20 is very small, and the fixing strength between the two is weak. And in actual application, when the upper end of the panel 10 is stressed, the joint surface will be subjected to a greater force, and the joint part is prone to cracking, which will cause the airtightness of the box body to fail. In this embodiment, the first joint structure 11 on the panel 10 is a partially concave structure, and the frame 20 is formed with a corresponding partially convex structure. After the panel 10 is fixed to the frame 20 through the first joint structure 11, the joint surface between the panel 10 and the frame 20 is non-planar. Compared with the planar joint surface, the area of the non-planar joint surface is larger, so as to improve the connection and fixing strength between the panel 10 and the frame 20. In some other embodiments, the first joint structure 11 can also be a partially convex structure. In some other embodiments, the first joint structure 11 can also be partially concave structure and there is a partially convex structure. In addition, in this embodiment, the first joint structure 11 has one partially concave structure. In some other embodiments, the first joint structure 11 can also have multiple partially concave structures or multiple partially convex structures.

[0058] As described above, the first joint structure 11 of the panel 10 is partially convex or partially concave, which can increase the connection area between the frame 20 and the panel 10, so as to improve the connection strength between the frame 20 and the panel 10 and increase the structural stability of the box body.

[0059] Please refer to Figure 3 , Figure 3 for Figure 2 the structural schematic diagram of the panel in

[0060] On one or more sides of the panel 10, a first engaging structure 11 is formed. In this embodiment, the first engaging structures 11 are provided on each side of the panel 10 so that each side of the panel 10 is respectively connected and fixed to the frame 20 to cover the opening on one side of the accommodating cavity of the frame 20. Among them, the panel 10 is in a flat plate shape, the plate edge portion of the panel 10 is the first engaging body 111, and the side facing outside the panel 10 of the first engaging body 111 is its side surface. The first connecting portion 112 is provided on the side surface of the first engaging body 111. Among them, the first inclined surface 1121 of the first connecting portion 112 faces the frame 20, and the area where the first inclined surface 1121 and the side surface of the first engaging body 111 where the first connecting portion 112 is not provided is the engaging surface for the first engaging structure 11 to be fixedly connected to the frame 20. This engaging surface is non-planar, so as to increase the connection area and improve the structural strength. In addition, the first inclined surface 1121 can specifically be a curved surface or a curved face.

[0061] As described above, by setting the side surface of the first engaging body 111 and the first inclined surface 1121 at an angle, the connection area with the frame 20 can be increased.

[0062] In some embodiments, the angle between the side surface of the first engaging body 111 and the first inclined surface 1121 is an obtuse angle.

[0063] The angle between the side surface of the first engaging body 111 and the first inclined surface 1121 can be a reasonable degree such as 135 degrees, 120 degrees, 110 degrees, etc. The angle between the side surface of the first engaging body 111 and the first inclined surface 1121 being an obtuse angle can reduce the stress concentration after being connected to the frame 20.

[0064] In some embodiments, the panel 10 is an integrated structure.

[0065] In this embodiment, the panel 10 is manufactured by stamping. In some other embodiments, the panel 10 can also be manufactured by die casting. For the integrated structure panel 10, the first engaging structure 11 formed on the panel 10 has no connection mold line, and the structural strength is high, and the box body is not easily deformed or damaged.

[0066] Please refer to Figure 4 , Figure 4 For Figure 2 the schematic structural diagram of the middle frame. In some embodiments, the frame 20 has a second engaging structure 22, and the second engaging structure 22 is connected to the first engaging structure 11; among them, the first engaging structure 11 is one of a local convex structure and a local concave structure, and the second engaging structure 22 is the other of a local convex structure and a local concave structure.

[0067] In this embodiment, the first joint structure 11 on the panel 10 is a partially concave structure, and the second joint structure 22 on the frame 20 is a partially convex structure. In some other embodiments, the first joint structure 11 can also be a partially convex structure, and the second joint structure 22 can be a partially concave structure. In some other embodiments, the first joint structure 11 can also be partially convex and partially concave, and correspondingly, the second joint structure 22 can be partially concave and partially convex.

[0068] As described above, the first joint structure 11 and the second joint structure 22 are joined, and the joint surface between the two is not a flat surface, which can increase the joint area.

[0069] In some embodiments, the frame 20 includes a frame body 21 and a second joint structure 22. The second joint structure 22 is provided on one side of the frame body 21. The second joint structure 22 has a second inclined surface 221, and the second inclined surface 221 is disposed at an angle with the surface of the frame body 21. Among them, the first inclined surface 1121 is joined to the second inclined surface 221, and the side surface of the first joint body 111 is joined to the surface of the frame body 21.

[0070] The second inclined surface 221 can be a flat surface or a curved surface. The angle between the second inclined surface 221 and the surface of the frame body 21 is the same as the angle between the first inclined surface 1121 and the side surface of the first joint body 111, so that the first joint structure 11 and the second joint structure 22 can be joined and fixed together.

[0071] As described above, the first joint structure 11 and the second joint structure 22 are joined, and the joint surface between the two is not a flat surface, which can increase the joint area.

[0072] Please refer to Figure 5 , Figure 5 which is a schematic diagram of the connection structure between the frame and the panel in a box according to another or multiple other embodiments. In some embodiments, the panel 10 further includes a fixing portion 113. The fixing portion 113 extends from the side surface of the panel 10 to the surface of the frame 20 and is connected to the surface of the frame 20.

[0073] The fixing part 113 is used to increase the connection area between the panel 10 and the frame 20, and can further improve the fixing strength between the panel 10 and the frame 20. Among them, the number of the fixing parts 113 can be one or more. When the number of the fixing parts 113 is multiple, the multiple fixing parts 113 can be arranged at intervals or connected. In addition, in this embodiment, the fixing part 113 is a rectangular sheet structure. In some other embodiments, the fixing part 113 can also be a circular sheet structure, an irregular polygon sheet structure, a block structure, a rod structure, etc. In addition, in this embodiment, the panel 10 has the fixing part 113, and the fixing part 113 extends from the side surface of the panel 10 to the surface of the frame 20 and is connected to the surface of the frame 20. In some other embodiments, the frame 20 can also have the fixing part 113, and the fixing part 113 extends from the side surface of the frame 20 to the surface of the panel 10 and is connected to the surface of the panel 10. In some other embodiments, both the panel 10 and the frame 20 can also have the fixing part 113.

[0074] As described above, the fixing part 113 of the panel 10 is connected to the surface of the frame 20, which can further increase the connection area between the panel 10 and the frame 20 and improve the fixing strength between the panel 10 and the frame 20.

[0075] In some embodiments, the frame 20 encloses to form a receiving cavity, and the panel 10 is located on one side of the receiving cavity; the box body further includes: a structural beam 30, and the structural beam 30 is located in the receiving cavity, and the structural beam 30 is connected to the frame 20.

[0076] In this embodiment, the planar shape of the receiving cavity formed by the frame 20 enclosing is rectangular. In some other embodiments, the planar shape of the receiving cavity formed by the frame 20 enclosing can also be other shapes such as circular and irregular polygon. The structural beam 30 is used to improve the strength of the box body, and can also be used to fix the battery device 100 on the electrical device. The structural beam 30 also facilitates the fixing of the box body on the transportation device during the production of the battery device 100, which is beneficial to the transportation of the box body. Among them, the number of the structural beams 30 is one or more, and the structural beam 30 can be fixed on the frame 20 by welding, and the structural beam 30 can also be fixed on the frame 20 by other means such as bolts and screws.

[0077] As described above, the structural beam 30 can play a role in supporting and fixing the battery cell 110.

[0078] In some embodiments, a relief groove 31 is formed by concave inward on one side of the structural beam 30 connected to the frame 20, and at least part of the fixing part 113 is located in the relief groove 31.

[0079] The structural beam 30 is connected to the surface of the frame 20, and the fixing part 113 is also located on the surface of the frame 20. The structural beam 30 can avoid the fixing part 113 by forming an avoidance groove 31, so that the size of the fixing part 113 can be made larger. Among them, the avoidance groove 31 can specifically be a blind groove or a through groove, and the number of avoidance grooves 31 can be one or more. In some other embodiments, the fixing part 113 can also be connected to the structural beam 30.

[0080] As described above, the structural beam 30 can avoid the fixing part 113 by forming an avoidance groove 31, so that the size of the fixing part 113 can be made larger.

[0081] In some embodiments, the first engaging structure 11 has an engaging surface in a curved surface shape or a curved surface shape.

[0082] The surface where the first engaging structure 11 is connected to the frame 20 is the engaging surface of the first engaging structure 11. Whether the engaging surface is in a curved surface shape or a curved surface shape can increase the area of the engaging surface and improve the fixing strength between the panel 10 and the frame 20.

[0083] As described above, whether the engaging surface is in a curved surface shape or a curved surface shape can increase the area of the engaging surface.

[0084] Please refer to Figure 8 , Figure 8 , which is an exploded view of the structure of a conductive connector according to still one or more embodiments. In some embodiments, the first engaging structure 11 includes a first engaging main body 111 and a first connecting part 112. The first connecting part 112 is provided on the side surface of the first engaging main body 111, and a first inclined surface 1121 is formed by partial inward concavity of the first connecting part 112. The frame 20 has a second engaging structure 22, and a second inclined surface 221 is also formed by partial inward concavity of the second engaging structure 22. The first inclined surface 1121 is engaged with the second inclined surface 221 to fix the panel 10 on the frame 20. In this embodiment, the first inclined surface 1121 and the second inclined surface 221 are inclined, so that the engaging surface of the panel 10 is inclined. The panel 10 with this structure can also increase the connection panel 10 between the panel 10 and the frame 20 and improve the fixing strength between the two.

[0085] In some embodiments, the panel 10 is a die-cast panel 10.

[0086] The panel 10 can be made by die-casting. The die-cast panel 10 has the advantages of high structural strength and few solder joints. In some other embodiments, the panel 10 can also be a stamping panel 10.

[0087] As described above, the die-cast panel 10 has high strength.

[0088] In some embodiments, the frame 20 is welded to the first engaging structure 11.

[0089] Welding has the advantages of good airtightness and high connection strength. Among them, the welding method can specifically be friction stir welding, friction welding, etc.

[0090] As described above, the welding has good airtightness and high connection strength.

[0091] Correspondingly, the present application also proposes an electrical device, which includes a battery device 100. The battery device 100 is the battery device 100 in any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0092] In the above electrical device, the first joint structure 11 of the panel 10 is partially convex or partially concave, which can increase the connection area between the frame 20 and the panel 10, thereby improving the connection strength between the frame 20 and the panel 10 and increasing the structural stability of the box body.

[0093] Finally, in a specific application scenario, aiming at the problems that the connection strength between the frame 20 and the panel 10 of the existing box body is low and the structural stability of the box body is poor. The battery device 100 of the present application includes a box body, the box body includes a frame 20 and a panel 10, the panel 10 forms a first engaging structure 11, the frame 20 is connected to the first engaging structure 11, and thus is fixed to the panel 10. The first engaging structure 11 is a locally convex structure or a locally concave structure. The first engaging structure 11 includes a first engaging body 111 and a first connecting portion 112. The first connecting portion 112 is disposed on the side surface of the first engaging body 111. The first connecting portion 112 has a first inclined surface 1121, and the first inclined surface 1121 is disposed at an angle with the side surface of the first engaging body 111. The angle between the side surface of the first engaging body 111 and the first inclined surface 1121 is an obtuse angle. The panel 10 is an integral structure. The frame 20 has a second engaging structure 22, and the second engaging structure 22 is connected to the first engaging structure 11; wherein, the first engaging structure 11 is one of a locally convex structure and a locally concave structure, and the second engaging structure 22 is the other of a locally convex structure and a locally concave structure. The frame 20 includes: a frame main body 21; a second engaging structure 22, the second engaging structure 22 is disposed on one side of the frame main body 21, and the second engaging structure 22 has a second inclined surface 221, and the second inclined surface 221 is disposed at an angle with the surface of the frame main body 21; wherein, the first inclined surface 1121 is engaged with the second inclined surface 221, and the side surface of the first engaging body 111 is engaged with the surface of the frame main body 21. The panel 10 further includes: a fixing portion 113, the fixing portion 113 extends from the side surface of the panel 10 to the surface of the frame 20 and is connected to the surface of the frame 20. The frame 20 encloses to form an accommodation cavity, and the panel 10 is located on one side of the accommodation cavity; the box body further includes: a structural beam 30, the structural beam 30 is located in the accommodation cavity, and the structural beam 30 is connected to the frame 20. An avoidance groove 31 is formed by concaving on the side of the structural beam 30 connected to the frame 20, and at least a part of the fixing portion 113 is located in the avoidance groove 31. The panel 10 is a die-cast panel 10. The frame 20 is welded to the first engaging structure 11.

[0094] In the above manner, the first engaging structure 11 of the panel 10 is locally convex or locally concave, which can increase the connection area between the frame 20 and the panel 10, thereby improving the connection strength between the frame 20 and the panel 10 and increasing the structural stability of the box body.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises a box, and the box comprises: frame; The panel forms a first joint structure, the frame is connected to the first joint structure, and is thus fixed to the panel, the first joint structure is a local convex structure or a local concave structure; the panel is an integrated structure.

2. The battery device according to claim 1, characterized in that: The frame has a second joining structure, which is connected to the first joining structure; wherein the first joining structure is one of the local convex structure and the local concave structure, and the second joining structure is the other of the local convex structure and the local concave structure.

3. The battery device according to claim 2, characterized in that: The first engagement structure comprises: a first joint body; The first connecting portion is arranged on the side surface of the first connecting body, and the first connecting portion has a first inclined surface, and the first inclined surface is arranged at an angle with the side surface of the first connecting body.

4. The battery device according to claim 3, characterized in that: An included angle between the side surface of the first joint body and the first inclined surface is an obtuse angle.

5. The battery device according to claim 3, characterized in that: The frame includes: A frame body; the second joining structure is arranged on one side of the frame body, the second joining structure has a second inclined surface, and the second inclined surface is arranged at an angle with the surface of the frame body; wherein the first inclined surface is joined with the second inclined surface, and the side surface of the first joining body is joined with the surface of the frame body.

6. The battery device according to claim 1, characterized in that: The panel also includes: A fixing portion extends from a side surface of the panel to a surface of the frame and is connected to the surface of the frame.

7. The battery device according to claim 6, characterized in that: The frame is arranged to form a receiving cavity, and the panel is located at one side of the receiving cavity; The box also includes: A structural beam is located in the accommodating cavity and is connected to the frame.

8. The battery device according to claim 7, characterized in that: A side of the structural beam connected to the frame is concave to form an escape groove, and at least a part of the fixing portion is located in the escape groove.

9. The battery device according to claim 1, characterized in that: The first bonding structure has a bonding surface that is in a bent or curved shape.

10. The battery device according to claim 1, characterized in that: The panel is a die-cast panel.

11. The battery device according to claim 1, characterized in that: The frame is welded to the first joining structure.

12. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 11, and the battery device is used to provide electrical energy.

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