Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device, the battery device comprises a battery monomer, a box body and a reinforcing assembly, the box body comprises a plurality of side beams, the plurality of side beams are connected and enclose to form an accommodating space for accommodating the battery monomer, and at least part of the side beams are recessed inwards from one side deviating from the accommodating space to form a groove structure; the reinforcing assembly is arranged in the groove structure and fixed to the side beam. In the embodiment of the invention, the groove structure is arranged, so that the contact area between the external structure and the side beam can be reduced when collision occurs. On the basis, the reinforcing assemblies are arranged in the groove structures, so that the stress can be dispersed or absorbed by virtue of the reinforcing assemblies, the stress transmitted to the side beams is reduced, the deformation resistance of the battery device at the side beams is improved, and the reliability of the battery device is improved.

Description

Technical Field

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

[0002] Battery monomers are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] In the development of battery technology, how to improve the reliability of battery devices and reduce the risk of deformation of battery devices due to external forces and other factors is a research direction in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] On the one hand, an embodiment of the present application provides a battery device, including a battery cell, a box body and a reinforcement assembly, the box body includes a plurality of side beams, the plurality of side beams are connected and enclosed to form a accommodating space for accommodating the battery cell, at least part of the side beams are recessed inward from a side away from the accommodating space to form a groove structure, and the reinforcement assembly is arranged in the groove structure and fixed to the side beams.

[0006] In the above scheme, the groove structure is provided to help reduce the contact area between the external structure and the side beam when a collision occurs. On this basis, a reinforcement component is provided in the groove structure, so that the stress can be dispersed or absorbed by the reinforcement component, thereby reducing the stress transmitted to the side beam, improving the deformation resistance of the battery device at the side beam, and improving the reliability of the battery device.

[0007] In some embodiments, the multiple side beams include two first side beams arranged opposite to each other along a first direction and two second side beams arranged opposite to each other along a second direction. The two first side beams and the two second side beams are alternately arranged in the circumferential direction of the accommodating space and are connected to each other first. The first direction intersects with the second direction, and at least part of the reinforcing component is arranged in the first side beam.

[0008] In the above scheme, by providing the first side beam with a groove structure and providing at least a portion of the reinforcing component in the first side beam, the reinforcing component can be used to help absorb or disperse part of the stress at the first side beam, thereby improving the deformation resistance of the battery device at the first side beam and improving the reliability of the battery device.

[0009] In some embodiments, the first side beam includes a first portion, and a second portion protruding along the first portion and disposed on a side of the first portion away from the accommodating space, and the groove structure is formed by the first portion being recessed inwardly.

[0010] In the above scheme, a groove structure is provided in the first part, and a reinforcing component is provided in the groove structure of the first part, so as to improve the deformation resistance of the first part with the help of the reinforcing component, thereby helping to improve the protection effect of the first part on the battery cell, reduce the influence of external stress on the battery cell, and improve the reliability of the use of the battery cell in the battery device.

[0011] In some embodiments, the box body further includes a bottom plate and a cover plate, the bottom plate and the cover plate are located on both sides of the accommodation space along the third direction, and the first direction, the second direction and the third direction intersect each other. The first part includes a first sub-part, a second sub-part and a third sub-part which are sequentially connected in the third direction, the first sub-part is connected to the bottom plate, the second sub-part is connected to the second part, and the third sub-part is connected to the cover plate, and the groove structure is formed by the third sub-part being recessed inwardly.

[0012] In the above scheme, a groove structure is provided in the third sub-section, and a reinforcing component is provided in the groove structure of the third sub-section, so as to improve the deformation resistance of the third sub-section with the help of the reinforcing component, improve the overall structural reliability of the first side beam, and improve the protective effect of the first side beam on the battery cell located in the accommodating space.

[0013] In some embodiments, the box body further includes a plurality of connecting members, the third sub-section includes a plurality of connecting holes spaced apart along the second direction, the connecting members pass through the connecting holes and connect and fix the first side beam and the cover plate, wherein the projection of the reinforcing assembly in the third direction is located between the projections of adjacent connecting members in the third direction.

[0014] In the above scheme, the projection of the reinforcing component in the third direction is located between the projections of the adjacent connecting members in the third direction, that is, the reinforcing component is located in the area between the adjacent connecting holes in the first side beam, so that the reinforcing component can avoid the connecting holes and the connecting members, and the projection of the reinforcing component in the third direction is not overlapped with the connecting members. This design can reduce the contact interference between the reinforcing component and the connecting members, thereby reducing the influence of the reinforcing component on the connection reliability between the first side beam and the cover plate, and reducing the influence on the overall structural reliability of the reinforcing component, and has strong practicality and reliability.

[0015] In some embodiments, a spacing between two second side beams is greater than a spacing between two first side beams.

[0016] In the above scheme, a groove structure is provided in the first side beam, and the reinforcement component is provided in the groove structure of the first side beam, thereby achieving a structural reinforcement effect on the first side beam, reducing the risk of damage and deformation of the first side beam, and improving the structural reliability of the first side beam.

[0017] In some embodiments, at least part of the side beam includes a first wall portion, which has a first surface and a second surface opposite to each other in its thickness direction, the first surface is used to enclose and form a receiving space, and the second surface is a groove bottom surface of the groove structure.

[0018] In the above scheme, a reinforcing component is added to the groove structure. When a collision occurs, the external structure will first contact the reinforcing component rather than directly contact the first wall portion, and the reinforcing component can disperse or absorb the corresponding stress, thereby reducing the stress transmitted to the first wall portion and reducing the risk of deformation and damage of the first wall portion, which is beneficial to improving the protection effect of the side beam on the battery cell and improving the reliability of the battery device.

[0019] In some embodiments, the reinforcement assembly includes a shell and a reinforcement member located in the shell, and the shell is disposed in the groove structure and fixed to the side beam.

[0020] In the above scheme, the shell and the reinforcement together form a modular structure independent of the side beam, so that the difficulty of forming the reinforcement component can be reduced. The shell can limit the reinforcement, and the shell can be located in the groove structure and fixed to the side beam, so that the position of the reinforcement in the groove structure can be fixed, so that when the battery device collides, the reinforcement can receive and absorb or disperse part of the stress to reduce the stress on the side beam, improve the deformation resistance of the battery device at the side beam, and improve the reliability of the battery device.

[0021] In some embodiments, the outer shell is bonded or welded to the side rails.

[0022] In the above scheme, the outer shell is connected to the side beam by bonding or welding. Compared with other connection methods, welding and bonding are relatively simple and help to improve the connection reliability between the outer shell and the side beam and reduce the risk of relative movement of the reinforcement in the groove structure. This can improve the position reliability of the reinforcement in the side beam and improve the reinforcement effect of the reinforcement on the battery device at the side beam, which has strong practicality.

[0023] In some embodiments, at least a portion of the outer surface of the reinforcement is a curved surface.

[0024] In the above scheme, by setting at least a portion of the outer surface of the reinforcement as a curved surface, the stress reaching the reinforcement can be transmitted to different directions with the help of the curved surface, that is, the direction of stress transmission is not restricted, thereby achieving stress dispersion, reducing the risk of structural damage caused by stress concentration, improving the structural stability of the battery device at the side beam, and improving the reliability of the battery device.

[0025] In some embodiments, the reinforcement comprises a bulbous structure.

[0026] In the above scheme, the reinforcement is configured to include a spherical structure, so that the stress transmitted to the reinforcement can be further dispersed in multiple different directions with the help of the spherical structure, thereby improving the stress dispersion effect of the reinforcement, further reducing the risk of stress concentration, and improving the reliability of the battery device.

[0027] In some embodiments, the maximum diameter of the spherical surface corresponding to the arc surface is D1, and D1 satisfies: 3mm≤D1≤10mm.

[0028] In the above scheme, by setting the maximum diameter D1 of the spherical surface corresponding to the arc surface to be no less than 3 mm, the arc surface itself can have a certain area size, thereby improving the stress dispersion effect of a single reinforcement member, and further improving the reliability of the battery device. At the same time, the maximum diameter D1 of the spherical surface corresponding to the arc surface is set to no more than 10 mm, so as to meet the placement requirements of the reinforcement member in the shell, so that multiple reinforcement members can be arranged in the shell, thereby improving the stress dispersion effect with the help of multiple reinforcement members, which has strong practicality.

[0029] In some embodiments, 3 mm ≤ D1 ≤ 6 mm.

[0030] In the embodiment of the present application, by limiting the maximum diameter D1 of the spherical surface corresponding to the arc surface to no more than 6 mm, it helps to further increase the number of reinforcements located in the outer shell, so that different reinforcements can be dispersedly arranged in various areas of the outer shell, thereby improving the stress dispersion effect with the help of a larger number of reinforcements and improving the structural stability of the battery device at the side beam.

[0031] In some embodiments, the reinforcement member includes a body portion, and a cavity is provided inside the body portion.

[0032] In the above scheme, a cavity is provided in the main body, that is, the main body is a hollow structure, such a design can not only make the arc surface have a certain structural strength, reduce the risk of damage due to stress on the arc surface, but also reduce the volume of materials required for preparing the main body, reduce the corresponding preparation cost, and also help to reduce the overall weight of the reinforcement, and realize the lightweight design of the battery device.

[0033] In some embodiments, the thickness of the main body is D2, and D2 satisfies 0.3 mm≤D2≤5 mm.

[0034] In the above scheme, by setting the thickness D2 of the main body to be not less than 0.3 mm, the main body can have a certain thickness dimension to meet the supporting effect on the arc surface, thereby reducing the risk of damage to the arc surface due to stress and improving the reliability of the arc surface's stress dispersion. At the same time, the thickness D2 of the main body is set to be not more than 5 mm, which helps to reduce the weight of the main body, reduce the adverse effect of the existence of the main body on the overall weight of the battery device, and is conducive to the lightweight design of the battery device.

[0035] In some embodiments, the material of the reinforcement includes at least one of steel, aluminum, and carbon fiber.

[0036] In the above scheme, steel, aluminum and carbon fiber are all materials with certain structural strength and small density parameters. On this basis, by setting the material of the reinforcement to include at least one of steel, aluminum and carbon fiber, the structural strength requirements of the reinforcement at the curved surface can be met, the risk of structural damage on the curved surface can be reduced, and the stress dispersion effect of the reinforcement can be improved. At the same time, this also helps to reduce the weight of the reinforcement, which is conducive to the lightweight design of the battery device.

[0037] In a second aspect, an embodiment of the present application provides an electrical device, which includes a battery device in any of the aforementioned embodiments.

[0038] In some embodiments, the plurality of side beams include a first side beam disposed opposite to each other along a first direction and two second side beams disposed opposite to each other along a second direction, the two first side beams and the two second side beams are alternately disposed in a circumferential direction of the accommodation space and are connected to each other, and the first direction intersects with the second direction. The electrical device further includes an electrical body, the first side beam is connected to the electrical body, and at least part of the reinforcing assembly is disposed in the first side beam.

[0039] In the above solution, the first side beam is connected and fixed to the power-consuming body in the power-consuming device, and compared with the second side beam, the first side beam is more susceptible to stress and deformation risk during the use of the power-consuming device. In view of this, by setting at least part of the reinforcement component in the first side beam, the first side beam can be structurally reinforced, the risk of damage and deformation of the first side beam can be reduced, and the structural reliability of the first side beam can be improved.

[0040] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 It is a simplified schematic diagram of a vehicle provided in an embodiment of the present application;

[0043] Figure 2 It is a structural schematic diagram of a box in a battery device provided in an embodiment of the present application;

[0044] Figure 3 is a structural schematic diagram of a box in another battery device provided in an embodiment of the present application;

[0045] Figure 4 is a structural schematic diagram of a box in another battery device provided in an embodiment of the present application;

[0046] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0047] Figure 6 is a schematic diagram of an exploded structure of a reinforcement component in a battery device provided in an embodiment of the present application;

[0048] Figure 7 It is a schematic cross-sectional structure diagram of a reinforcement member in another battery device provided in an embodiment of the present application.

[0049] In the attached figure:

[0050] 1000. Vehicles;

[0051] 100, battery device; 200, controller; 300, motor;

[0052] 10. box body; 11. side beam; 11a. first side beam; 11b. second side beam; 111. first part; 1111. first sub-part; 1112. second sub-part; 1113. third sub-part; 112. second part; 12. bottom plate; 13. connecting hole; 14. connecting member; 15. first wall;

[0053] 20. reinforcement component; 21. shell; 211. shell; 212. end cover; 22. reinforcement member; 221. main body; 23. filling part;

[0054] M1, first surface; M2, second surface;

[0055] K1, accommodation space; K2, cavity;

[0056] A. Groove structure;

[0057] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0058] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0061] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0063] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0064] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), which means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0065] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0066] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0067] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0068] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of 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 the specific circumstances.

[0069] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0070] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0071] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0072] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0073] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0074] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0075] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0076] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0077] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0078] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0079] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0080] In some embodiments, the battery device may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0081] The box can contain multiple battery cells, and the side beams of the box can surround and protect the battery cells. However, during the use of the battery device, the side beams are easily affected by external impacts and easily cause deformation risks, which cannot protect the battery cells and affect the reliability of the battery device.

[0082] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0083] The battery device described in the embodiments of the present application is not limited to being applicable to the electrical devices described above, but for the sake of simplicity, the following embodiments are all described using electric vehicles as examples.

[0084] See also Figure 1 , Figure 1 A simple schematic diagram of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 may be provided inside the vehicle 1000, and specifically, for example, a battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used, for example, to control the battery to power the motor 300. The battery device 100 may be used for starting and navigating the vehicle 1000, and of course, the battery device 100 may also be used to drive the vehicle 1000, replacing or partially replacing fuel or natural gas to provide drive for the vehicle 1000.

[0085] Next, the structure of the battery device 100 will be described in detail in conjunction with the accompanying drawings. Figure 2 and Figure 3 The battery device 100 includes a battery cell, a box body 10 and a reinforcing component 20. The box body 10 includes a plurality of side beams 11. The plurality of side beams 11 are connected and enclosed to form a receiving space K1 for receiving the battery cell. At least a portion of the side beams 11 are recessed inward from a side away from the receiving space K1 to form a groove structure A. The reinforcing component 20 is disposed in the groove structure A and fixed to the side beams 11.

[0086] The battery cell is the main component of the battery device 100 for providing electrical energy, and the housing 10 is a component structure of the battery device 100 for accommodating and protecting the battery cell. In the battery device 100, there can be one or more battery cells. If there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells can be accommodated in the housing 10; of course, multiple battery cells can also be connected in series, in parallel, or in a mixed connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in the housing 10.

[0087] The side beam 11 is a beam structure used to define the accommodating space K1 in the box 10. A plurality of side beams 11 are alternately connected and arranged around the accommodating space K1, and the connection methods include but are not limited to bolt connection and welding connection. The box 10 can have a variety of shapes. In order to meet the needs of forming boxes 10 of different shapes, the side beams 11 often need to be specifically designed according to the shape of the box 10. For example, if the box 10 is a square structure, the shape of the side beam 11 can be flat, and the number of the side beams 11 can be four, and the four side beams 11 are arranged around the accommodating cavity and connected to each other.

[0088] The structures, dimensions and shapes of different side beams 11 may be the same, or they may be different. Further, at least part of the side beams 11 are provided with a groove structure A. Specifically, the side beam 11 has a relative inner side and outer side. The inner side of the side beam 11 is used to enclose and form a receiving space K1, and the groove structure A is a groove-shaped structure formed by the outer side of the side beam 11 being recessed inward. The presence of the groove structure A helps to reduce the overall weight of the side beam 11. The size of the groove structure A in the extension direction of the side beam 11 may be the same as the length of the side beam 11, or the size of the groove structure A in the extension direction of the side beam 11 may be smaller than the length of the side beam 11. Further, in the extension direction of the side beam 11, the two sides of the groove structure A may be blocked and limited, or the two sides of the groove structure A may not be blocked, that is, the two sides of the groove structure A in the extension direction of the side beam 11 may be connected to the external environment, or may not be connected to the external environment.

[0089] It should be noted that the "extension direction of the side beam 11" mentioned here refers to: the direction corresponding to the overall extension trend of the side beam 11. When the side beam 11 is a rectangular parallelepiped, the extension direction of the side beam 11 is its length direction. When the side beam 11 is a curved structure, the extension direction of the side beam 11 can be the direction of the line connecting its head end and the tail end.

[0090] Furthermore, the present application also adds a reinforcement component 20 in the groove structure A. The reinforcement component 20 is a component that can enhance the structural strength of the side beam 11. In a single side beam 11, only one reinforcement component 20 may be provided, or multiple reinforcement components 20 may also be provided.

[0091] The reinforcing component 20 is fixed to the side beam 11, and there are multiple ways to fix the reinforcing component 20 and the side beam 11, as long as the relative position between the reinforcing component 20 and the side beam 11 can be kept fixed, and stress transfer can be achieved between the reinforcing component 20 and the side beam 11. For example, the reinforcing component 20 can be in direct contact with the inner wall of the side beam 11 used to form the groove structure A, and the two are connected and fixed by welding and bolting. Alternatively, the reinforcing component 20 and the inner wall of the side beam 11 used to form the groove structure A can also be spaced apart. In this case, the groove structure A needs to be filled with other structures, and the position of the reinforcing component 20 relative to the side beam 11 can be fixed by means of the structure.

[0092] In the related art, during the application of the battery device 100, the side beam 11 is prone to direct collision and contact with the external structure, thereby causing deformation risk under the action of external stress, affecting the structural reliability of the battery device 100, and even easily having an adverse effect on the operation of the battery cell located in the accommodating space K1.

[0093] In the embodiment of the present application, a groove structure A is provided in at least part of the side beam 11, and a reinforcing component 20 is added in the groove structure A, thereby helping to improve the ability of the side beam 11 to resist external impact. Specifically, the external structure usually collides with the battery device 100 at the peripheral side of the battery device 100, that is, at the outer side of the side beam 11. When the collision occurs, the external structure will first contact the reinforcing component 20 or other structures located in the groove structure A, and then the reinforcing component 20 will transfer part of the stress to the side beam 11. In this process, the reinforcing component 20 can absorb or dissipate part of the stress to reduce the stress transferred to the side beam 11 and reduce the degree of deformation of the side beam 11.

[0094] In summary, in the embodiment of the present application, the groove structure A is provided to help reduce the contact area between the external structure and the side beam 11 when a collision occurs. On this basis, by providing a reinforcement component 20 in the groove structure A, the reinforcement component 20 can be used to disperse or absorb the stress, thereby reducing the stress transmitted to the side beam 11, improving the deformation resistance of the battery device 100 at the side beam 11, and improving the reliability of the battery device 100.

[0095] In some embodiments, Figure 2 and Figure 3As shown, the multiple side beams 11 include two first side beams 11a arranged opposite to each other along a first direction X and two second side beams 11b arranged opposite to each other along a second direction Y. The two first side beams 11a and the two second side beams 11b are alternately arranged in the circumferential direction of the accommodating space K1 and are connected to each other first. The first direction X intersects with the second direction Y, and at least part of the reinforcement component 20 is arranged in the first side beam 11a.

[0096] The first side beam 11a and the second side beam 11b are beam structures arranged at different circumferential positions of the accommodation space K1 along different directions. The first side beam 11a extends along the second direction Y, and the two first side beams 11a are arranged relatively spaced apart in the first direction X. The second side beam 11b extends along the first direction X, and the two second side beams 11b are arranged relatively spaced apart in the second direction Y. Optionally, the first direction X and the second direction Y are arranged perpendicular to each other.

[0097] On this basis, the two ends of a single first side beam 11a in the second direction Y can be connected to the two second side beams 11b respectively, and the two ends of a single second side beam 11b in the first direction X can be connected to the two first side beams 11a respectively, and the two first side beams 11a and the two second side beams 11b are alternately connected to form a ring structure surrounding the accommodation space K1. There can be a variety of connection methods between the first side beam 11a and the second side beam 11b, for example, the first side beam 11a and the second side beam 11b can be connected and fixed by welding and bolting.

[0098] It should be noted that the first side beam 11a and the second side beam 11b may have a variety of length relationships. For example, the length of the first side beam 11a in the second direction Y may be greater than the length of the second side beam 11b in the first direction X, or the length of the first side beam 11a in the second direction Y may be less than the length of the second side beam 11b in the first direction X.

[0099] In the embodiment of the present application, by providing the first side beam 11a with a groove structure A and providing at least a portion of the reinforcing component 20 in the first side beam 11a, the reinforcing component 20 can be used to help absorb or disperse part of the stress at the first side beam 11a, thereby improving the deformation resistance of the battery device 100 at the first side beam 11a and improving the reliability of the battery device 100.

[0100] In some embodiments, see Figure 2 , Figure 4 and Figure 5 The first side beam 11a includes a first portion 111 and a second portion 112 protruding along the first portion 111 and disposed on a side of the first portion 111 away from the accommodation space K1 . The groove structure A is formed by the first portion 111 being recessed inwardly.

[0101] The first side beam 11a includes at least a first part 111 and a second part 112. The first part 111 is a beam structure in the first side beam 11a for enclosing and forming an accommodating space K1. In the first direction X, the first part 111 has two opposite sides, one of which is used to enclose and form the accommodating space K1, and a partial area of ​​the other side is used to be connected and fixed with the second part 112.

[0102] The second part 112 is a beam structure in the first side beam 11a for connecting and fixing with the power-consuming body. Exemplarily, a plurality of mounting holes are provided on the second part 112, and the power-consuming body and the second part 112 are fixedly connected through the mounting holes. The first part 111 and the second part 112 both extend along the second direction Y, and the two are connected and fixedly arranged. Optionally, the first part 111 and the second part 112 include the same material and are connected and arranged as a whole.

[0103] Considering that the first part 111 is used to enclose and form the accommodation space K1, and the first part 111 is the main structure in the first side beam 11a that can protect the battery cell. Therefore, the embodiment of the present application is provided with a groove structure A in the first part 111, and the reinforcing component 20 is arranged in the groove structure A of the first part 111, so as to improve the anti-deformation ability of the first part 111 with the help of the reinforcing component 20, thereby helping to improve the protective effect of the first part 111 on the battery cell, reduce the influence of external stress on the battery cell, and improve the reliability of the battery cell in the battery device 100.

[0104] It should be noted that, depending on actual needs, the second part 112 may be provided with a groove structure A and a reinforcing component 20, or may not be provided with a groove structure A and a reinforcing component 20. That is, depending on actual needs, the reinforcing component 20 may be used to improve the structural reliability of the second part 112, or the reinforcing component 20 may not be provided at the second part 112, so as to achieve a lightweight design of the battery device 100.

[0105] In some embodiments, Figures 2 to 5 As shown, the box body 10 further includes a bottom plate 12 and a cover plate, the bottom plate 12 and the cover plate are located on both sides of the accommodation space K1 along the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other. The first part 111 includes a first sub-part 1111, a second sub-part 1112 and a third sub-part 1113 which are sequentially connected and arranged in the third direction Z, the first sub-part 1111 is connected to the bottom plate 12, the second sub-part 1112 is connected to the second part 112, the third sub-part 1113 is connected to the cover plate, and the groove structure A is formed by the third sub-part 1113 being recessed inwardly.

[0106] The two first side beams 11a are arranged on both sides of the accommodation space K1 along the first direction X, the two second side beams 11b are arranged on both sides of the accommodation space K1 along the second direction Y, the bottom plate 12 and the cover plate are arranged on both sides of the accommodation space K1 along the third direction Z. The two first side beams 11a, the two second side beams 11b, the bottom plate 12 and the cover plate can cooperate with each other to define the accommodation space K1 and play a role in limiting and protecting the battery cell. Optionally, the first direction X, the second direction Y and the third direction Z are arranged vertically in pairs.

[0107] During the assembly of the battery device 100, the battery cells are placed on the bottom plate 12, and the side beams 11 are connected to the bottom plate 12 by bolts or the like to form a box structure with an opening on one side, and then the top cover is covered on the opening of the box structure to form a box body 10 surrounding the battery cells.

[0108] The first part 111 includes a first sub-part 1111, a second sub-part 1112 and a third sub-part 1113. The second sub-part 1112 is located between the first sub-part 1111 and the third sub-part 1113. The second sub-part 1112 is connected to the first sub-part 1111 and the third sub-part 1113 on both sides in the third direction Z. Optionally, the first sub-part 1111, the second sub-part 1112 and the third sub-part 1113 are connected as a whole.

[0109] The first sub-section 1111 is a partial structure of the first part 111 used to connect and fix with the bottom plate 12, and the connection method between the two includes but is not limited to bolt connection and welding. The third sub-section 1113 is a partial structure of the first part 111 used to connect and fix with the cover plate, and the connection method between the two includes but is not limited to bolt connection and welding. The second sub-section 1112 is a partial structure of the first part 111 used to connect and fix with the second part 112, and optionally, the second sub-section 1112 is connected and fixed with the second part 112 as an integral arrangement.

[0110] At the position of the second sub-section 1112, since the second sub-section 1112 is connected and fixed to the second part 112, the second sub-section 1112 and the second part 112 can bear the impact stress from the external structure together, thereby helping to reduce the corresponding deformation degree of the second sub-section 1112 and the second part 112. As for the first sub-section 1111 and the third sub-section 1113, the position of the third sub-section 1113 is more susceptible to the impact stress from the external structure, thereby causing the risk of deformation.

[0111] In view of this, the embodiment of the present application is provided with a groove structure A in the third sub-section 1113, and the reinforcement component 20 is arranged in the groove structure A of the third sub-section 1113, so as to improve the anti-deformation ability of the third sub-section 1113 with the help of the reinforcement component 20, improve the overall structural reliability of the first side beam 11a, and improve the protection effect of the first side beam 11a on the battery cell located in the accommodating space K1.

[0112] It should be noted that the first sub-portion 1111 and the second sub-portion 1112 may have various structural forms. Optionally, the first sub-portion 1111, the second sub-portion 1112 and the second portion 112 are all hollow structures, which helps to reduce the weight of the first side beam 11a.

[0113] In some embodiments, Figure 2 As shown, the box body 10 further includes a plurality of connecting members 14, and the third sub-section 1113 includes a plurality of connecting holes 13 spaced apart along the second direction Y. The connecting members 14 pass through the connecting holes 13 and connect and fix the first side beam 11a and the cover plate. The projection of the reinforcing assembly 20 in the third direction Z is located between the projections of adjacent connecting members 14 in the third direction Z.

[0114] The connecting member 14 is a component for connecting and fixing the first side beam 11a and the cover plate. Specifically, the third sub-portion 1113 includes a plurality of connecting holes 13, and the plurality of connecting holes 13 are arranged at intervals along the second direction Y and are arranged corresponding to the plurality of connecting members 14. Optionally, the connecting member 14 may be a structure such as a bolt including an external thread, and the connecting member 14 passes through the connecting hole 13 and realizes the connection and fixation between the first side beam 11a and the cover plate by bolt connection.

[0115] Further, in the embodiment of the present application, the projection of the reinforcing component 20 in the third direction Z is located between the projections of the adjacent connecting members 14 in the third direction Z, that is, the reinforcing component 20 is located in the area between the adjacent connecting holes 13 in the first side beam 11a, so that the reinforcing component 20 can avoid the connecting holes 13 and the connecting members 14, and the projection of the reinforcing component 20 in the third direction Z is not overlapped with the connecting members 14. This design can reduce the contact interference between the reinforcing component 20 and the connecting member 14, thereby reducing the influence of the reinforcing component 20 on the connection reliability between the first side beam 11a and the cover plate, and reducing the influence on the overall structural reliability of the reinforcing component 20, and has strong practicality and reliability.

[0116] It should be noted that one or more reinforcement components 20 can be arranged in the groove structure A. Optionally, when multiple reinforcement components 20 are arranged in the groove structure A, the multiple reinforcement components 20 are arranged at intervals in the second direction Y, and the connecting member 14 is correspondingly arranged between adjacent reinforcement components 20, so as to achieve the relative avoidance requirement between the connecting member 14 and the reinforcement component 20.

[0117] In some embodiments, a distance between two second side beams 11 b is greater than a distance between two first side beams 11 a .

[0118] The distance between the two second side beams 11b is often positively correlated with the length of the single first side beam 11a in the second direction Y, that is, the larger the distance between the two second side beams 11b, the larger the length of the single first side beam 11a in the second direction Y. Similarly, the distance between the two first side beams 11a is often positively correlated with the length of the single second side beam 11b in the first direction X, that is, the larger the distance between the two first side beams 11a, the larger the length of the single second side beam 11b in the first direction X.

[0119] On this basis, the spacing between the two second side beams 11b is greater than the spacing between the two first side beams 11a, which means that the length of a single first side beam 11a in the second direction Y is greater than the length of a single second side beam 11b in the first direction X. Further, when the battery device 100 is applied to an electrical device, the first side beam 11a having a larger extension length will be connected and fixed to the electrical main body in the electrical device, and compared with the second side beam 11b, the first side beam 11a is more susceptible to stress and deformation risk during the use of the electrical device.

[0120] In view of this, the embodiment of the present application is provided with a groove structure A in the first side beam 11a, and the reinforcement component 20 is arranged in the groove structure A of the first side beam 11a, so as to have a structural reinforcement effect on the first side beam 11a, reduce the risk of damage and deformation of the first side beam 11a, and improve the structural reliability of the first side beam 11a.

[0121] In some embodiments, Figures 2 to 5 As shown, at least part of the side beam 11 includes a first wall portion 15, and the first wall portion 15 has a first surface M1 and a second surface M2 opposite to each other in its thickness direction. The first surface M1 is used to enclose and form an accommodating space K1, and the second surface M2 is the bottom surface of the groove structure A. Figure 5 In the figure, the position of the first wall portion 15 is indicated by a dotted box.

[0122] The first wall portion 15 is a thin-walled structure located on a specific side beam 11, wherein the side beam 11 has a groove structure A. The first surface M1 and the second surface M2 are two opposite wall surfaces located on the first wall portion 15. The first surface M1 is located on the side of the first wall portion 15 facing the battery cell and is used to enclose and form a receiving space, while the second surface is located on the side of the first wall portion 15 away from the battery cell and is reused as the bottom surface of the groove structure A.

[0123] It should be noted that the "bottom surface of the groove structure A" mentioned here refers to the wall surface used to enclose the groove structure A in the concave direction of the groove structure A. On this basis, the thickness direction of the first wall portion 15 is the concave direction of the groove structure A.

[0124] It can be seen from the accompanying drawings that the first wall portion 15 is close to the battery cell, but the thickness of the first wall portion 15 itself is small. Therefore, it is difficult to achieve the protection effect of the battery cell by relying solely on the first wall portion 15. The first wall portion 15 is easily deformed under the action of external stress, affecting the normal use of the battery device 100.

[0125] In view of this, the embodiment of the present application adds a reinforcing component 20 in the groove structure A. When a collision occurs, the external structure will first contact the reinforcing component 20 rather than directly contact the first wall portion 15, and the reinforcing component 20 can disperse or absorb the corresponding stress, thereby reducing the stress transmitted to the first wall portion 15 and reducing the risk of deformation and damage of the first wall portion 15, which is beneficial to improving the protection effect of the side beam 11 on the battery cell and improving the reliability of the battery device 100.

[0126] In some embodiments, see Figures 3 to 6 The reinforcement assembly 20 includes a shell 21 and a reinforcement member 22 located in the shell 21 . The shell 21 is disposed in the groove structure A and fixed to the side beam 11 .

[0127] The reinforcement component 20 at least includes an outer shell 21 and a reinforcement 22. The outer shell 21 is a shell structure with a hollow structure. The reinforcement 22 is a main component for improving the deformation resistance of the battery device 100 at the position of the side beam 11. The reinforcement 22 is located in the outer shell 21, and the outer shell 21 can limit the reinforcement 22. Among them, only one reinforcement 22 can be arranged in the outer shell 21, or multiple reinforcements 22 can be arranged in the outer shell 21 at the same time. Furthermore, there can be a variety of fixing methods between the reinforcement 22 and the outer shell 21. For example, the reinforcement 22 can be fixed in contact with the outer shell 21 by welding or the like, or other structures can be filled between the reinforcement 22 and the inner wall of the outer shell 21 to achieve relative fixation between the reinforcement 22 and the outer shell 21, or the internal space size of the outer shell 21 and the number and size parameters of the reinforcement 22 can be adjusted so that the reinforcement 22 is fixed by the outer shell 21. Among them, Figure 5 As shown in the figure, a filling portion 23 is also provided in the shell 21 , and the filling portion 23 is filled between adjacent reinforcement members 22 and between the reinforcement member 22 and the shell 21 to achieve relative fixation between the reinforcement member 22 and the shell 21 .

[0128] The shell 21 may have various shapes, for example, the outer shape of the shell 21 may be a square structure, or the outer shape of the shell 21 may be a circular structure, or the outer shape of the shell 21 may be other regular or irregular structures. The shell 21 may also have various structural forms, for example, the shell 21 may include a shell 211 with openings on both sides or one side, and an end cap 212 for covering the opening, and the reinforcement 22 may be assembled into the shell 21 through the opening on the shell 211, so as to meet the assembly and fixing requirements of the shell 21 and the reinforcement 22.

[0129] Furthermore, the outer shell 21 is arranged in the groove structure A and fixed to the side beam 11. There are various positions and connection methods between the outer shell 21 and the side beam 11. For example, the outer shell 21 can be in contact with the side beam 11 and relatively fixed by bonding, welding and connection, or the outer shell 21 and the side beam 11 can be spaced apart, and there are other structures between the two to achieve relative fixation between the outer shell 21 and the side beam 11.

[0130] In addition to the outer shell 21, the reinforcement member 22 may also have a variety of shapes, for example, the reinforcement member 22 may be in a square structure, or in a circular structure, or in other regular or irregular structures. The reinforcement member 22 may be in a solid structure, or in a hollow structure.

[0131] In addition, the shell 21 and the reinforcement 22 may also be made of a variety of materials. Optionally, the shell 21 and the reinforcement 22 both include metal materials, which help to improve the structural strength of the reinforcement 22 and the shell 21, reduce the risk of deformation of both due to external stress, and improve the reinforcement reliability of the reinforcement 22 on the side beam 11. Structural strength refers to the ability of a material or component to resist damage caused by external forces.

[0132] In the embodiment of the present application, the shell 21 and the reinforcement 22 together form a modular structure independent of the side beam 11, so that the difficulty of forming the reinforcement assembly 20 can be reduced. The shell 21 can limit the reinforcement 22, and the shell 21 can be located in the groove structure A and fixed to the side beam 11, so that the position of the reinforcement 22 in the groove structure A can be fixed, so that when the battery device 100 collides, the reinforcement 22 can receive and absorb or disperse part of the stress, so as to reduce the stress on the side beam 11, improve the deformation resistance of the battery device 100 at the side beam 11, and improve the reliability of the battery device 100.

[0133] In some embodiments, the housing 21 is bonded or welded to the side beam 11 .

[0134] In the embodiment of the present application, the outer shell 21 is connected to the side beam 11 by bonding or welding. Compared with other connection methods, welding and bonding are relatively simple and help to improve the connection reliability between the outer shell 21 and the side beam 11, and reduce the risk of relative movement of the reinforcement 22 in the groove structure A. In this way, the position reliability of the reinforcement 22 in the side beam 11 can be improved, and the reinforcement effect of the reinforcement 22 on the battery device 100 at the side beam 11 can be improved, which has strong practicality.

[0135] In some embodiments, at least a portion of the outer surface of the reinforcement member 22 is a curved surface.

[0136] The arc surface is a curved surface structure with a certain curvature. Compared with the solution in which the outer surface of the reinforcement 22 is a rectangular structure, the setting of the arc surface can effectively disperse the stress acting thereon, so that the external stress reaching the reinforcement 22 can be transmitted to different directions with the help of the arc surface, thereby achieving stress dispersion, reducing the risk of structural damage caused by stress concentration, and improving the structural reliability of the battery device 100 at the side beam 11.

[0137] It should be noted that the outer surface of the reinforcement 22 may only include a curved surface, or the outer surface of the reinforcement 22 may also be formed by splicing a curved surface and a flat surface. Further, the curvature of the curved surface at different positions may be the same or different. For example, the surface of the reinforcement 22 may include one of an elliptical shape and a spherical shape, as long as at least a portion of the outer surface of the reinforcement 22 has a certain curvature.

[0138] In the embodiment of the present application, by setting at least a portion of the outer surface of the reinforcement 22 as a curved surface, the stress reaching the reinforcement 22 can be transmitted to different directions with the help of the curved surface, that is, the direction of stress transmission is not restricted, thereby achieving stress dispersion, reducing the risk of structural damage caused by stress concentration, improving the structural stability of the battery device 100 at the side beam 11, and improving the reliability of the battery device 100.

[0139] In some embodiments, Figure 6 As shown, the reinforcement member 22 comprises a bulbous structure.

[0140] The spherical structure is a structure including a spherical surface, in other words, the arc surface is a spherical surface. The spherical structure can be a hollow structure, that is, a cavity K2 is provided in the spherical structure; or the spherical structure can be a solid structure, that is, no cavity K2 is provided in the spherical structure.

[0141] In the embodiment of the present application, the reinforcement 22 is configured to include a spherical structure, so that the stress transmitted to the reinforcement 22 can be further dispersed in multiple different directions with the help of the spherical structure, thereby improving the stress dispersion effect of the reinforcement 22, further reducing the risk of stress concentration, and improving the reliability of the battery device 100.

[0142] In some embodiments, see Figure 2 , Figure 6 as well as Figure 7 The maximum diameter of the spherical surface corresponding to the arc surface is D1, and D1 satisfies: 3mm≤D1≤10mm. Optionally, D1 is one of 3mm, 5mm, 7mm, 9mm and 10mm.

[0143] It should be noted that the curvature of the arc surface at different positions may be the same or different. The "curvature" mentioned here refers to the degree of bending of the arc surface at a specific position. Furthermore, the greater the curvature of the arc surface at a specific position, the smaller the diameter of the spherical surface corresponding to the arc surface at that position, and the smaller the curvature, the larger the diameter of the spherical surface corresponding to the arc surface at that position. On this basis, the diameters of the spherical surfaces corresponding to the arc surface at different positions may be the same or different.

[0144] When the diameters of the spherical surfaces corresponding to the arc surface at different positions are consistent, the maximum diameter D1 of the spherical surface corresponding to the arc surface is the diameter of the spherical surface corresponding to the arc surface at any position. When the diameters of the spherical surfaces corresponding to the arc surface at different positions are different, the maximum diameter D1 of the spherical surface corresponding to the arc surface is the diameter of the spherical surface corresponding to the position where the curvature of the arc surface is the smallest.

[0145] In the embodiment of the present application, by setting the maximum diameter D1 of the spherical surface corresponding to the arc surface to be no less than 3 mm, the arc surface itself can have a certain area size, thereby improving the stress dispersion effect of a single reinforcement member 22, and further improving the reliability of the battery device 100. At the same time, the maximum diameter D1 of the spherical surface corresponding to the arc surface is set to no more than 10 mm, so as to meet the placement requirements of the reinforcement member 22 in the shell 21, so that multiple reinforcement members 22 can be arranged in the shell 21, so that the stress dispersion effect can be improved with the help of multiple reinforcement members 22, which has strong practicality.

[0146] In some embodiments, 3 mm ≤ D1 ≤ 6 mm.

[0147] In the embodiment of the present application, by limiting the maximum diameter D1 of the spherical surface corresponding to the arc surface to no more than 6 mm, it helps to further increase the number of reinforcements 22 located in the outer shell 21, so that different reinforcements 22 can be dispersedly arranged in various areas of the outer shell 21, thereby improving the stress dispersion effect with the help of a larger number of reinforcements 22 and improving the structural stability of the battery device at the side beam.

[0148] In some embodiments, Figure 2 , Figure 6 as well as Figure 7 As shown, the reinforcement member 22 includes a main body portion 221 , and a cavity K2 is provided inside the main body portion 221 .

[0149] The body 221 is the main component of the reinforcement 22, and the curved surface is at least part of the outer surface of the body 221. In order to reduce the risk of damage to the curved surface due to stress, the body 221 itself needs to have a certain structural strength. Optionally, the structural strength of the body 221 is greater than or equal to the structural strength of the side beam 11.

[0150] Furthermore, the embodiment of the present application also provides a cavity K2 in the main body 221, that is, the main body 221 is a hollow structure, such a design can not only make the curved surface have a certain structural strength, but also reduce the risk of damage due to stress on the curved surface. It can also reduce the volume of materials required for preparing the main body 221, reduce the corresponding preparation cost, and also help to reduce the overall weight of the reinforcement 22, thereby realizing a lightweight design of the battery device 100.

[0151] It should be noted that the reinforcement member 22 may include only the main body 221, or the reinforcement member 22 may include other structures in addition to the main body 221. Further, according to different actual needs, other material structures may not be provided in the cavity K2, or other material structures may be provided in the cavity K2.

[0152] In some embodiments, the reinforcement member 22 further includes a reinforcement portion disposed in the cavity K2 , and the density of the reinforcement portion is less than the density of the main body portion 221 .

[0153] The reinforcement part is a structure arranged in the cavity K2 for improving the performance of the reinforcement member 22 itself. The reinforcement part has various forms. For example, the reinforcement part may include a buffer material to improve the stress receiving buffering effect of the reinforcement member 22.

[0154] In the embodiment of the present application, the reinforcement part is filled in the cavity K2 of the main body 221. The reinforcement part can make the reinforcement 22 a solid structure, and help improve the performance of the reinforcement 22 itself, and improve the use effect of the reinforcement 22. Further, the reinforcement part and the main body 221 include different materials, and the density of the reinforcement part is less than the density of the main body 221. Compared with the solution in which the main body 221 is a solid structure, this design helps to reduce the influence of the existence of the reinforcement part on the weight of the reinforcement 22, so that while improving the performance of the reinforcement 22, the reinforcement 22 can have a smaller weight, which is conducive to the lightweight design of the battery device 100.

[0155] In some embodiments, Figure 7 As shown, the thickness of the main body 221 is D2, and D2 satisfies 0.3 mm ≤ D2 ≤ 5 mm. Optionally, D2 is one of 0.3 mm, 0.8 mm, 1 mm, 3 mm and 5 mm.

[0156] It should be noted that the thickness D2 of the body 221 mentioned here refers to the average distance between the inner surface and the outer surface of the body 221 in the radial direction of the arc surface. The distance between the inner surface and the outer surface of the body 221 at different positions can be the same or different.

[0157] In the embodiment of the present application, by setting the thickness D2 of the main body 221 to be no less than 0.3 mm, the main body 221 can have a certain thickness dimension to meet the supporting effect on the arc surface, thereby reducing the risk of damage to the arc surface due to stress and improving the reliability of the arc surface's stress dispersion. At the same time, the thickness D2 of the main body 221 is set to be no more than 5 mm, which helps to reduce the weight of the main body 221, reduce the adverse effect of the existence of the main body 221 on the overall weight of the battery device 100, and facilitate the lightweight design of the battery device 100.

[0158] In some embodiments, the material of the reinforcement 22 includes at least one of steel, aluminum, and carbon fiber.

[0159] In the embodiment of the present application, steel, aluminum and carbon fiber are all materials with certain structural strength and relatively small density parameters. On this basis, by setting the material of the reinforcement 22 to include at least one of steel, aluminum and carbon fiber, the structural strength requirements of the reinforcement 22 at the curved surface can be met, the risk of structural damage on the curved surface can be reduced, and the stress dispersion effect of the reinforcement 22 can be improved. At the same time, this also helps to reduce the weight of the reinforcement 22, which is conducive to the lightweight design of the battery device 100.

[0160] Second, as Figure 1As shown, an embodiment of the present application provides an electrical device, which includes the battery device 100 in any of the aforementioned embodiments, and the battery device 100 is used to provide electrical energy.

[0161] It should be noted that the electrical device provided in the embodiment of the present application has the beneficial effects of the battery device 100 in any of the aforementioned embodiments. Please refer to the aforementioned description of the beneficial effects of the battery device 100 for details, and the embodiment of the present application will not be repeated.

[0162] In some embodiments, the plurality of side beams 11 include a first side beam 11a disposed oppositely along a first direction X and two second side beams 11b disposed oppositely along a second direction Y. The two first side beams 11a and the two second side beams 11b are alternately disposed in the circumferential direction of the accommodation space K1 and are connected to each other, and the first direction X intersects the second direction Y. The electrical device further includes an electrical main body, the first side beam 11a is connected to the electrical main body, and at least part of the reinforcing assembly 20 is disposed in the first side beam 11a.

[0163] In the embodiment of the present application, the first side beam 11a is connected and fixed to the main body of the electric device, and compared with the second side beam 11b, the first side beam 11a is more susceptible to stress and deformation during the use of the electric device. In view of this, by setting at least part of the reinforcement component 20 in the first side beam 11a, the first side beam 11a can be structurally reinforced, the risk of damage and deformation of the first side beam 11a is reduced, and the structural reliability of the first side beam 11a is improved.

[0164] According to some embodiments of this application, please refer to Figures 2 to 6 The battery device 100 includes a battery cell, a box body 10 and a reinforcing assembly 20. The box body 10 includes a plurality of side beams 11. The plurality of side beams 11 are connected and enclosed to form a receiving space K1 for receiving the battery cell. At least a portion of the side beams 11 are recessed inward from a side away from the receiving space K1 to form a groove structure A. The reinforcing assembly 20 is disposed in the groove structure A and fixed to the side beams 11.

[0165] The plurality of side beams 11 include first side beams 11a disposed opposite to each other along a first direction X and two second side beams 11b disposed opposite to each other along a second direction Y. The two first side beams 11a and the two second side beams 11b are alternately disposed in the circumferential direction of the accommodation space K1 and are connected to each other first, and the first direction X intersects the second direction Y. The spacing between the two second side beams 11b is greater than or equal to the spacing between the two first side beams 11a, and at least part of the reinforcement assembly 20 is disposed in the first side beam 11a.

[0166] The first side beam 11a includes a first portion 111, and a second portion 112 protruding from the first portion 111 on a side away from the accommodation space K1 along the first direction X. The box body 10 also includes a bottom plate 12 and a cover plate, the bottom plate 12 and the cover plate are located on both sides of the accommodation space K1 along the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other. The first portion 111 includes a first sub-portion 1111, a second sub-portion 1112 and a third sub-portion 1113 sequentially connected in the third direction Z, the first sub-portion 1111 is connected to the bottom plate 12, the second sub-portion 1112 is connected to the second portion 112, the third sub-portion 1113 is connected to the cover plate, and the groove structure A is formed by the third sub-portion 1113 being recessed inwardly.

[0167] The box body 10 further includes a plurality of connecting members 14, and the third sub-section 1113 includes a plurality of connecting holes 13 arranged at intervals along the second direction Y. The connecting members 14 pass through the connecting holes 13 and connect and fix the first side beam 11a and the cover plate. The projection of the reinforcing assembly 20 in the third direction Z is located between the projections of adjacent connecting members 14 in the third direction Z.

[0168] The reinforcement assembly 20 includes a shell 21 and a reinforcement member 22 located in the shell 21 . The shell 21 is disposed in the groove structure A and is bonded or welded to the side beam 11 . The reinforcement member 22 includes a spherical structure.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; 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 included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body, comprising a plurality of side beams, wherein the plurality of side beams are connected and enclosed to form a storage space for accommodating the battery cells, and at least a portion of the side beams are recessed inward from a side away from the storage space to form a groove structure; The reinforcing assembly is arranged in the groove structure and fixed to the side beam.

2. The battery device according to claim 1, characterized in that: The plurality of side beams include two first side beams arranged opposite to each other along a first direction and two second side beams arranged opposite to each other along a second direction, the two first side beams and the two second side beams are alternately arranged in a circumferential direction of the accommodation space and are connected to each other, and the first direction intersects with the second direction; At least a portion of the reinforcement assembly is disposed within the first side beam.

3. The battery device according to claim 2, characterized in that: The first side beam comprises a first portion, and a second portion protruding along the first direction and disposed on a side of the first portion away from the accommodation space; The groove structure is formed by the first portion being recessed inwardly.

4. The battery device according to claim 3, characterized in that: The box body further includes a bottom plate and a cover plate, wherein the bottom plate and the cover plate are located on both sides of the accommodation space along a third direction, and the first direction, the second direction and the third direction intersect each other; The first part includes a first sub-part, a second sub-part and a third sub-part which are sequentially connected in the third direction, the first sub-part is connected to the bottom plate, the second sub-part is connected to the second part, and the third sub-part is connected to the cover plate; The groove structure is formed by the third sub-portion being recessed inwardly.

5. The battery device according to claim 4, characterized in that: The box body further includes a plurality of connecting members, the third sub-section includes a plurality of connecting holes spaced apart along the second direction, the connecting members pass through the connecting holes and connect and fix the first side beam and the cover plate; Wherein, the projection of the reinforcing component in the third direction is located between the projections of adjacent connecting members in the third direction.

6. The battery device according to claim 2, characterized in that: The distance between the two second side beams is greater than or equal to the distance between the two first side beams.

7. The battery device according to claim 1, characterized in that: At least part of the side beam includes a first wall portion, the first wall portion has a first surface and a second surface opposite to each other in its thickness direction, the first surface is used to enclose and form the accommodating space, and the second surface is the bottom surface of the groove structure.

8. The battery device according to claim 1, characterized in that: The reinforcement assembly includes an outer shell and a reinforcement member located in the outer shell. The outer shell is arranged in the groove structure and fixed to the side beam.

9. The battery device according to claim 8, characterized in that: The shell is connected to the side beam by bonding or welding.

10. The battery device according to claim 8, characterized in that: At least a portion of the outer surface of the reinforcement is a curved surface.

11. The battery device according to claim 10, characterized in that: The reinforcement member includes a spherical structure.

12. The battery device according to claim 10, characterized in that: The maximum diameter of the spherical surface corresponding to the arc surface is D1, and D1 satisfies: 3mm≤D1≤10mm.

13. The battery device according to claim 12, characterized in that: 3mm≤D1≤6mm.

14. The battery device according to claim 8, characterized in that The reinforcement member includes a body portion, and the body portion has a cavity inside.

15. The battery device according to claim 14, characterized in that: The thickness of the main body is D2, and D2 satisfies 0.3mm≤D2≤5mm.

16. The battery device according to claim 8, characterized in that The material of the reinforcement includes at least one of steel, aluminum and carbon fiber.

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

18. The electrical device according to claim 17, characterized in that: The plurality of side beams include two first side beams arranged opposite to each other along a first direction and two second side beams arranged opposite to each other along a second direction, the two first side beams and the two second side beams are alternately arranged in a circumferential direction of the accommodation space and are connected to each other, and the first direction intersects with the second direction; The power-consuming device further includes a power-consuming body, the first side beam is connected to the power-consuming body, and at least a portion of the reinforcement assembly is disposed in the first side beam.

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