Battery devices and power-consuming devices

Abstract

The present application provides a battery device and an electrical device, wherein the battery device includes a battery cell, a box body, and a plurality of reinforcements, wherein the box body includes a plurality of side beams, wherein the plurality of side beams are connected and enclosed to form a storage space for accommodating the battery cell, wherein at least one side beam is provided with a storage cavity inside, wherein the reinforcement is provided in the storage cavity and fixed to the side beam, and at least a portion of the outer surface of the reinforcement is a curved surface. In an embodiment of the present application, the stress acting on the side beam can be transferred to the reinforcement, thereby sharing part of the stress at the side beam with the aid of the reinforcement. Furthermore, at least a portion of the outer surface of the reinforcement is a curved surface, so that the stress transferred to the reinforcement can be transferred to different directions with the aid of the curved surface, so that the direction of stress transfer is not restricted, thereby achieving stress dispersion.

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. Summary of the invention

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

[0005] On the one hand, an embodiment of the present application provides a battery device including a battery cell, a box body and a plurality of reinforcement members, the box body including a plurality of side beams, the plurality of side beams being connected and enclosed to form a accommodating space for accommodating the battery cell, at least one side beam being provided with an accommodating cavity inside, the reinforcement member being provided in the accommodating cavity and fixed to the side beam, and at least a portion of an outer surface of the reinforcement member being a curved surface.

[0006] In the above scheme, by adding a reinforcement member in the accommodating cavity and fixing the reinforcement member to the side beam, the stress acting on the side beam can be transferred to the reinforcement member, so that part of the stress at the side beam can be shared by means of the reinforcement member. Furthermore, at least part of the outer surface of the reinforcement member is an arc surface, so that the stress transferred to the reinforcement member can be transferred to different directions by means of the arc surface, so that the direction of stress transfer is not limited, thereby achieving stress dispersion, reducing the risk of structural damage caused by stress concentration, improving the structural stability of the battery device at least part of the side beam, and improving the protective effect of the side beam on the battery cell, which helps to improve the reliability of the battery device.

[0007] In some embodiments, the reinforcement comprises a bulbous structure.

[0008] 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.

[0009] In some embodiments, the battery device further includes a filling portion disposed in the accommodating cavity and filled between adjacent reinforcement members, and the reinforcement member is fixed to the side beam through the filling portion.

[0010] In the above scheme, a filling part is added in the accommodating cavity, and the side beam and the reinforcement are relatively fixed by means of the filling part, thereby reducing the difficulty of fixing the reinforcement and the side beam, and helping to improve the relative position reliability between the side beam and the reinforcement. At the same time, the existence of the filling part can also separate different reinforcements, reduce the risk of structural damage due to rigid contact between different reinforcements, and improve the structural reliability of the reinforcement.

[0011] In addition, the existence of the filling portion can also meet the need for stress transfer between the side beam and the reinforcement, so that the stress acting on the side beam can be transferred to the reinforcement with the help of the filling portion, and then the stress can be dispersed along different directions to the filling portions at different positions around the reinforcement with the help of the curved surface of the reinforcement, thereby achieving a stress dispersion effect.

[0012] In some embodiments, the filling portion is bonded and fixed to the reinforcement member.

[0013] In the above solution, by bonding and fixing the filling part to the reinforcement, it is helpful to improve the connection strength between the filling part and the reinforcement, thereby improving the fixing effect between the reinforcement and the side beam. And by setting the filling part to include a gelatinous material, the filling part itself can be a soft structure. This design helps the filling part to have a certain buffering effect on stress, further reducing the risk of structural damage at the side beam, and improving the reliability of the battery device.

[0014] In some embodiments, the maximum diameter of the spherical surface corresponding to the arc surface is D1, and D1 satisfies: 3mm≤D1≤10mm.

[0015] 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 the 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 accommodating cavity, so that multiple reinforcement members can be arranged in the accommodating cavity, thereby being able to improve the stress dispersion effect with the help of multiple reinforcement members, which has strong practicality.

[0016] In some embodiments, 3 mm ≤ D1 ≤ 6 mm.

[0017] 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 accommodating cavity, so that different reinforcements can be dispersedly arranged in various areas of the accommodating cavity, 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.

[0018] In some embodiments, the reinforcement member includes a body portion, and a cavity is provided inside the body portion.

[0019] In the above solution, 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 amount of materials required to prepare 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.

[0020] In some embodiments, the reinforcement member further includes a reinforcement portion disposed in the cavity, and a density of the reinforcement portion is less than a density of the main body portion.

[0021] In the above solution, the reinforcement part is filled in the cavity of the main body, and the reinforcement part can make the reinforcement member have a solid structure, and help improve the performance of the reinforcement member itself, and improve the use effect of the reinforcement member. Furthermore, the reinforcement part and the main body are made of different materials, and the density of the reinforcement part is less than the density of the main body. Compared with the solution in which the main body is a solid structure, this design helps to reduce the influence of the existence of the reinforcement part on the weight of the reinforcement member, so that while improving the performance of the reinforcement member, the reinforcement member can have a smaller weight, which is conducive to the lightweight design of the battery device.

[0022] In some embodiments, the thickness of the main body is D2, and D2 satisfies 0.3 mm≤D2≤5 mm.

[0023] 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.

[0024] In some embodiments, the material of the reinforcement includes at least one of steel, aluminum, and carbon fiber.

[0025] 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.

[0026] In some embodiments, the plurality of side beams include two first side beams 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 connected end to end, and the first direction intersects the second direction. At least part of the reinforcement is disposed in the first side beam.

[0027] In the above solution, by providing the first side beam with a receiving cavity and providing at least part of the reinforcement in the first side beam, the stress on the first side beam can be transferred to the reinforcement, so that the reinforcement can share part of the stress on the first side beam. Furthermore, the stress transferred from the first side beam to the reinforcement can be transferred to different directions by means of the arc surface, so that the direction of stress transfer is not limited, thereby reducing the risk of the first side beam being damaged due to stress concentration, which helps to improve the reliability of the battery device.

[0028] In some embodiments, a spacing between two second side beams is greater than a spacing between two first side beams.

[0029] In the above solution, at least part of the reinforcement is arranged in the first side beam, so as to have a structural reinforcement effect on the first side beam, reduce the risk of damage and deformation of the first side beam, and improve the structural reliability of the first side beam.

[0030] In some embodiments, the first side beam includes a first part and a second part protruding from the first part along a first direction on a side away from the accommodating space, the accommodating cavity includes a first accommodating portion located in the first part and a second accommodating portion located in the second part, and at least part of the reinforcement portion is arranged in the first accommodating portion.

[0031] In the above solution, considering that the first part is a beam structure used to enclose and form a receiving space and can protect the battery cell, at least part of the reinforcing part is arranged in the first receiving part, so as to share part of the stress at the first part with the help of the reinforcing part, reduce the risk of damage and deformation of the first part, and further help 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 battery cell in the battery device.

[0032] In some embodiments, part of the reinforcement is disposed in the second accommodating portion, the second portion has a mounting hole extending through the second portion along a third direction, the first direction, the second direction and the third direction intersect each other, and in the third direction, the projection of the reinforcement is outside the projection of the mounting hole.

[0033] In the above scheme, the position of the reinforcement relative to the mounting hole is restricted and adjusted so that in the third direction, the projection of the reinforcement is located outside the projection of the mounting hole, that is, the reinforcement is arranged to avoid the mounting hole. This design can reduce the risk of deformation and damage at the second part with the help of the reinforcement without affecting the connection reliability between the second part and the electrical entity at the mounting hole.

[0034] In some embodiments, the first portion includes a reinforcing rib structure disposed in the first accommodating portion, the reinforcing rib structure divides the first accommodating portion into a plurality of accommodating sub-portions, and a plurality of reinforcing members are disposed in the plurality of accommodating sub-portions.

[0035] In the above scheme, multiple reinforcement members are respectively arranged in multiple different accommodating sub-portions, so that the first part can share stress with the help of the reinforcement parts at the corresponding positions of different accommodating sub-portions, thereby further reducing the risk of deformation and damage of the first part, improving the structural reliability of the first part, and the protective effect of the first part on the battery cells located in the accommodating space.

[0036] In some embodiments, a dimension of the first receiving portion in the first direction is not less than twice a dimension of the reinforcement member in the first direction.

[0037] In the above scheme, by limiting the size of the reinforcement, the second accommodating portion can accommodate at least two rows of reinforcements in the width direction of the second part. This helps to further improve the stress dispersion transmission effect of the reinforcement by using multiple rows of reinforcements, thereby further reducing the risk of deformation and damage of the first part, improving the structural reliability of the first part, and the protective effect of the first part on the battery cells located in the accommodating space.

[0038] 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.

[0039] 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 main body, the first side beam is connected to the electrical main body, and at least part of the reinforcement is disposed in the first side beam.

[0040] 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 in the first side beam, the first side beam can be structurally strengthened, 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.

[0041] 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

[0042] 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.

[0043] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0044] Figure 2 It is a structural schematic diagram of a box in a battery device provided in an embodiment of the present application;

[0045] Figure 3 is a structural schematic diagram of a box in another battery device provided in an embodiment of the present application;

[0046] Figure 4 is a schematic cross-sectional structure diagram of a box in another battery device provided in an embodiment of the present application;

[0047] Figure 5 is a schematic cross-sectional structure diagram of a reinforcement member in a battery device provided in an embodiment of the present application;

[0048] Figure 6 It is a schematic diagram of the cross-sectional structure of a box 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; 112. Second part; 113. Mounting hole; 114. Reinforcement rib structure; 12. Bottom plate;

[0053] 20. reinforcement member; 21. main body; 22. reinforcement part;

[0054] 30. Filling part;

[0055] K1, accommodating space; K2, accommodating cavity; K21, first accommodating portion; K211, accommodating sub-portion; K22, second accommodating portion; K3, cavity;

[0056] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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).

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] The box can hold 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. On this basis, since the side beams themselves are square in shape, and the square structure is prone to stress concentration at the corners and edges under the action of external forces, it is difficult to achieve a buffering effect against external forces by relying solely on the side beams, and it is easy to cause deformation risks, and it is impossible to protect the battery cells, affecting the reliability of the battery device.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] Next, the structure of the battery device 100 will be described in detail in conjunction with the accompanying drawings. Figures 2 to 4The battery device 100 includes a battery cell (not shown in the figure), a box body 10 and a plurality of reinforcement members 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. A receiving cavity K2 is provided inside at least one side beam 11. The reinforcement member 20 is provided in the receiving cavity K2 and fixed to the side beam 11. At least a portion of the outer surface of the reinforcement member 20 is a curved surface.

[0085] 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.

[0086] 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 K2 and connected to each other.

[0087] It should be noted that, in addition to the side beams 11, the box body 10 may also include other structures. For example, the box body 10 may also include a bottom plate 12 and a top cover. 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. In the thickness direction of the bottom plate 12, the top cover covers the opening of the box structure and forms a closed space, so that the side beams 11, the bottom plate 12 and the top cover can cooperate with each other to limit and protect the battery cells. The closure mentioned here refers to covering or closing. Furthermore, the box body 10 formed by the side beams 11, the bottom plate 12 and the top cover can be a sealed structure or a non-sealed structure.

[0088] The structures, sizes and shapes of different side beams 11 may be the same or different. Furthermore, at least some of the side beams 11 are provided with a receiving cavity K2, that is, at least some of the side beams 11 are hollow structures. Among them, all side beams 11 may include a receiving cavity K2, that is, all side beams 11 are hollow structures, or some side beams 11 may not include a receiving cavity K2, that is, some side beams 11 are hollow structures, while other side beams 11 are solid structures.

[0089] In order to improve the reliability of the battery device 100, the embodiment of the present application further adds a plurality of reinforcement members 20, which are components that can enhance the structural strength of the side beam 11. The reinforcement member 20 is arranged in the accommodating cavity K2. According to different actual needs, the reinforcement member 20 can be arranged only in a single side beam 11, or in multiple or all side beams 11. In addition, in a single side beam 11, only one reinforcement member 20 can be arranged, or multiple reinforcement members 20 can be arranged.

[0090] The reinforcement 20 is fixed to the side beam 11, and there are multiple ways to fix the reinforcement 20 and the side beam 11, as long as the relative position between the reinforcement 20 and the side beam 11 can be kept fixed, and stress transfer can be achieved between the reinforcement 20 and the side beam 11. For example, the reinforcement 20 can be in direct contact with the inner wall of the side beam 11 used to form the accommodating cavity K2, and the two are connected and fixed by welding and bolting. Alternatively, the reinforcement 20 and the inner wall of the side beam 11 used to form the accommodating cavity K2 can also be spaced apart, and in this case, the accommodating cavity K2 needs to be filled with other structures, and the position of the reinforcement 20 relative to the side beam 11 can be fixed by means of the structure.

[0091] At least a portion of the outer surface of the reinforcement 20 is an arc surface, which is a curved surface structure with a certain curvature. Compared with a solution in which the outer surface of the reinforcement 20 is a rectangular structure, the setting of the arc surface can effectively disperse the stress acting thereon, so that the stress transferred from the side beam 11 to the reinforcement 20 can be transferred 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 side beam 11.

[0092] It should be noted that the reinforcement 20 may have a variety of structural forms, for example, the reinforcement 20 may be a solid structure, or the reinforcement 20 may be a hollow structure. And the reinforcement 20 may include a variety of material forms, for example, the reinforcement 20 may include only a single material, or the reinforcement 20 may include a composite material formed by a variety of materials. Further, different structures in the reinforcement 20 may include the same material, or may include different materials.

[0093] In addition, the outer surface of the reinforcement 20 may only include a curved surface, or the outer surface of the reinforcement 20 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 20 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 20 has a certain curvature.

[0094] In summary, the embodiment of the present application adds a reinforcement member 20 in the accommodating cavity K2 and fixes the reinforcement member 20 to the side beam 11, so that the stress acting on the side beam 11 can be transferred to the reinforcement member 20, so that part of the stress at the side beam 11 is shared by the reinforcement member 20. Furthermore, at least part of the outer surface of the reinforcement member 20 is a curved surface, so that the stress transferred to the reinforcement member 20 can be transferred to different directions by means of the curved surface, so that the direction of stress transfer is not limited, thereby achieving stress dispersion, reducing the risk of structural damage caused by stress concentration, improving the structural stability of the battery device 100 at least part of the side beam 11, and improving the protection effect of the side beam 11 on the battery cell, which helps to improve the reliability of the battery device 100.

[0095] In some embodiments, the reinforcement member 20 comprises a bulbous structure.

[0096] 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 K3 is provided in the spherical structure; or the spherical structure can be a solid structure, that is, no cavity K3 is provided in the spherical structure.

[0097] In the embodiment of the present application, the reinforcement 20 is configured to include a spherical structure, so that the stress transmitted to the reinforcement 20 can be further dispersed in multiple different directions with the help of the spherical structure, thereby improving the stress dispersion effect of the reinforcement 20, further reducing the risk of stress concentration, and improving the reliability of the battery device 100.

[0098] In some embodiments, Figures 2 to 4 As shown, the battery device 100 further includes a filling portion 30 disposed in the accommodating cavity K2 and filled between adjacent reinforcement members 20 , and the reinforcement member 20 is fixed to the side beam 11 via the filling portion 30 .

[0099] The filling part 30 is a structure used to fill the accommodating cavity K2 and realize the relative fixation between the reinforcement 20 and the side beam 11. The filling part 30 can have a variety of material forms. For example, the filling part 30 can include a foam material, which is filled in the accommodating cavity K2, and the reinforcement 20 is embedded in the foam material, so as to realize the relative fixation between the reinforcement 20 and the side beam 11. Alternatively, the filling part 30 can also include a glue structure. On this basis, the reinforcement 20 is first prepared and then placed in the accommodating cavity K2. After that, the filling part 30 filled in the adjacent reinforcements 20 and between the reinforcement 20 and the side beam 11 is formed in the accommodating cavity K2 by using a glue pouring and curing method, and the cured filling part 30 can realize the relative fixation between the reinforcement 20 and the side beam 11.

[0100] Considering that the reinforcement 20 includes a curved surface, directly contacting and connecting the reinforcement 20 with the side beam 11 may be difficult to process, and there is also a risk of poor connection between the reinforcement 20 and the side beam 11. In view of this, the embodiment of the present application adds a filling portion 30 in the accommodating cavity K2, and uses the filling portion 30 to achieve relative fixation between the side beam 11 and the reinforcement 20, thereby reducing the difficulty of fixing the reinforcement 20 and the side beam 11, and helping to improve the relative position reliability between the side beam 11 and the reinforcement 20. At the same time, the presence of the filling portion 30 can also separate different reinforcements 20, reduce the risk of structural damage due to rigid contact between different reinforcements 20, and improve the structural reliability of the reinforcement 20.

[0101] In addition, the existence of the filling portion 30 can also meet the need for stress transfer between the side beam 11 and the reinforcement 20, so that the stress acting on the side beam 11 can be transferred to the reinforcement 20 with the help of the filling portion 30, and then the stress can be dispersed along different directions to the filling portions 30 at different positions around the reinforcement 20 with the help of the curved surface of the reinforcement 20, thereby achieving a stress dispersion effect.

[0102] In some embodiments, the filling portion 30 is bonded and fixed to the reinforcement member 20 .

[0103] The filling portion 30 is a structure having a viscous material, and the filling portion 30 can be bonded and fixed to the side beam 11 and the reinforcement 20 respectively, so as to achieve the position fixation between the reinforcement 20 and the side beam 11. Optionally, the filling portion 30 can include a colloid material, and during the preparation of the battery device 100, the reinforcement 20 can be first arranged in the accommodating cavity K2, and then the filling portion 30 filled in the adjacent reinforcement 20 and between the reinforcement 20 and the side beam 11 is formed in the accommodating cavity K2 by a glue pouring and curing method.

[0104] In the embodiment of the present application, the filling part 30 is bonded and fixed to the reinforcement 20, which helps to improve the connection strength between the filling part 30 and the reinforcement 20, thereby improving the fixing effect between the reinforcement 20 and the side beam 11. In addition, by setting the filling part 30 to include a gelatinous material, the filling part 30 itself can be a soft structure. This design helps the filling part 30 to have a certain buffering effect on stress, further reducing the risk of structural damage at the side beam 11, and improving the reliability of the battery device 100.

[0105] In some embodiments, see Figure 2 , Figure 3 as well as Figure 5 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.

[0106] 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.

[0107] 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 with the minimum curvature on the arc surface.

[0108] In the embodiment of the present application, the maximum diameter D1 of the spherical surface corresponding to the arc surface is set to be not less than 3 mm, so that the arc surface itself can have a certain area size, thereby improving the stress dispersion effect of the reinforcement member 20 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 be not more than 10 mm, so as to meet the placement requirements of the reinforcement member 20 in the accommodating cavity K2, so that multiple reinforcement members 20 can be arranged in the accommodating cavity K2, thereby being able to improve the stress dispersion effect with the help of multiple reinforcement members 20, which has strong practicality.

[0109] In some embodiments, 3 mm ≤ D1 ≤ 6 mm.

[0110] 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 20 located in the accommodating cavity K2, so that different reinforcements 20 can be dispersedly arranged in various areas of the accommodating cavity K2, thereby improving the stress dispersion effect with the help of a larger number of reinforcements 20, and improving the structural stability of the battery device 100 at the side beam 11.

[0111] In some embodiments, Figure 2 , Figure 3 as well as Figure 5 As shown, the reinforcement member 20 includes a main body portion 21 , and a cavity K3 is provided inside the main body portion 21 .

[0112] The main body 21 is the main component of the reinforcement part. The arc surface is at least part of the outer surface of the main body 21. In order to reduce the risk of the arc surface being damaged due to stress, the main body 21 itself needs to have a certain structural strength. Structural strength refers to the ability of a material or component to resist damage caused by external forces. Optionally, the structural strength of the main body 21 is greater than or equal to the structural strength of the side beam 11.

[0113] Furthermore, the embodiment of the present application also provides a cavity K3 in the main body 21, that is, the main body 21 is a hollow structure, such a design can not only make the arc surface have a certain structural strength, but also reduce the risk of damage due to stress on the arc surface. It can also reduce the amount of materials required to prepare the main body 21, reduce the corresponding preparation cost, and also help to reduce the overall weight of the reinforcement 20, so as to achieve a lightweight design of the battery device 100.

[0114] It should be noted that the reinforcement member 20 may include only the main body 21, or the reinforcement member 20 may include other structures in addition to the main body 21. Further, according to different actual needs, other material structures may not be provided in the cavity K3, or other material structures may be provided in the cavity K3.

[0115] In some embodiments, see Figure 6 The reinforcement member 20 further includes a reinforcement portion 22 disposed in the cavity K3 , and the density of the reinforcement portion 22 is less than the density of the main body portion 21 .

[0116] The reinforcement part 22 is a structure arranged in the cavity K3 for improving the performance of the reinforcement member 20 itself. The reinforcement part 22 has various forms. For example, the reinforcement part 22 may include a buffer material to improve the stress receiving buffering effect of the reinforcement member 20.

[0117] In the embodiment of the present application, the reinforcement part 22 is filled in the cavity K3 of the main body 21. The reinforcement part 22 can make the reinforcement member 20 present a solid structure, and help improve the performance of the reinforcement member 20 itself, and improve the use effect of the reinforcement member 20. Further, the reinforcement part 22 and the main body 21 include different materials, and the density of the reinforcement part 22 is less than the density of the main body 21. Compared with the solution in which the main body 21 is a solid structure, this design helps to reduce the influence of the existence of the reinforcement part 22 on the weight of the reinforcement member 20, so that while improving the performance of the reinforcement member 20, the reinforcement member 20 can have a smaller weight, which is conducive to the lightweight design of the battery device 100.

[0118] In some embodiments, Figure 5 As shown, the thickness of the body portion 21 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.

[0119] It should be noted that the thickness D2 of the body 21 mentioned here refers to the average distance between the inner surface and the outer surface of the body 21 in the radial direction of the arc surface. The distance between the inner surface and the outer surface of the body 21 at different positions can be the same or different.

[0120] In the embodiment of the present application, by setting the thickness D2 of the main body 21 to be no less than 0.3 mm, the main body 21 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 21 is set to be no more than 5 mm, which helps to reduce the weight of the main body 21, reduce the adverse effect of the main body 21 on the overall weight of the battery device 100, and facilitate the lightweight design of the battery device 100.

[0121] In some embodiments, the material of the reinforcement 20 includes at least one of steel, aluminum, and carbon fiber.

[0122] 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 20 to include at least one of steel, aluminum and carbon fiber, the structural strength requirements of the reinforcement 20 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 20 can be improved. At the same time, this also helps to reduce the weight of the reinforcement 20, which is conducive to the lightweight design of the battery device 100.

[0123] In some embodiments, Figures 2 to 4As shown, the plurality of 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 accommodation space K1 and connected end to end, and the first direction X intersects the second direction Y. At least part of the reinforcement member 20 is arranged in the first side beam 11a.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] In the embodiment of the present application, the first side beam 11a is provided with a receiving cavity K2, and at least part of the reinforcement 20 is provided in the first side beam 11a, so that the stress on the first side beam 11a can be transferred to the reinforcement 20, so that part of the stress on the first side beam 11a is shared by the reinforcement 20. Furthermore, the stress transferred from the first side beam 11a to the reinforcement 20 can be transferred to different directions by means of the arc surface, so that the direction of stress transfer is not limited, thereby reducing the risk of the first side beam 11a being damaged due to stress concentration, which helps to improve the reliability of the battery device 100.

[0128] In some embodiments, a distance between two second side beams 11 b is greater than a distance between two first side beams 11 a .

[0129] 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.

[0130] 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.

[0131] In view of this, the embodiment of the present application sets at least part of the reinforcement 20 in 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.

[0132] It should be noted that the second side beam 11b may be a hollow structure or a solid structure. That is, the second side beam 11b may include a receiving cavity K2 or may not include the receiving cavity K2. Further, when the second side beam 11b includes the receiving cavity K2, a reinforcement member 20 may be provided in the second side beam 11b or may not be provided in the second side beam 11b.

[0133] In some embodiments, Figure 4 As shown, the first side beam 11a includes a first part 111 and a second part 112 protruding from the first part 111 along the first direction X and away from the accommodating space K1. The accommodating cavity K2 includes a first accommodating portion K21 located in the first part 111 and a second accommodating portion K22 located in the second part 112. At least part of the reinforcement portion is arranged in the first accommodating portion K21.

[0134] The first side beam 11a at least includes a first portion 111 and a second portion 112. The first portion 111 is a beam structure in the first side beam 11a for enclosing and forming the accommodation space K1, and the second portion 112 is a beam structure in the first side beam 11a for connecting and fixing with an external structure (such as an electrical main body). The first portion 111 and the second portion 112 both extend along the second direction Y, and the two are connected and fixedly arranged. Optionally, the first portion 111 and the second portion 112 include the same material and are connected and integrally arranged.

[0135] The first part 111 and the second part 112 are both hollow structures, and a first accommodating portion K21 is provided in the first part 111, and a second accommodating portion K22 is provided in the second part 112. The first accommodating portion K21 and the second accommodating portion K22 can together form an accommodating cavity K2. The first accommodating portion K21 and the second accommodating portion K22 can be connected, or the first accommodating portion K21 and the second accommodating portion K22 can be separated from each other.

[0136] Furthermore, considering that the first part 111 is a beam structure used to enclose and form the accommodation space K1 and can protect the battery cell, the embodiment of the present application sets at least part of the reinforcement part in the first accommodation part K21, so as to share part of the stress at the first part 111 with the reinforcement part, reduce the risk of damage and deformation of the first part 111, and further help to improve the protection 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.

[0137] It should be noted that, depending on actual needs, a reinforcement member 20 may or may not be provided in the second accommodating portion K22, that is, the reinforcement member 20 may or may not be used to enhance the structural reliability of the second part 112.

[0138] In some embodiments, Figures 2 to 4 As shown, part of the reinforcement member 20 is disposed in the second receiving portion K22 , and the second portion 112 has a mounting hole 113 extending through the third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other. In the third direction Z, the projection of the reinforcement member 20 is outside the projection of the mounting hole 113 .

[0139] The mounting hole 113 is a hole structure provided on the second part 112 for connecting and fixing the box body 10 to the electrical main body. Optionally, the second part 112 may be provided with a sleeve structure at the mounting hole 113, and the electrical main body is connected and fixed to the second part 112 through the sleeve structure.

[0140] The mounting hole 113 is arranged through the second portion 112 along the third direction Z. Optionally, the box body 10 may further include a bottom plate 12, and the thickness direction of the bottom plate 12 is parallel to the third direction Z. Further optionally, the first direction X, the second direction Y and the third direction Z are arranged perpendicularly in pairs.

[0141] The mounting hole 113 can be connected to the second accommodating portion K22, that is, the second accommodating portion K22 can be connected to the external environment by means of the mounting hole 113. The number of the mounting hole 113 can be one or more. Optionally, a plurality of mounting holes 113 are provided, and the plurality of mounting holes 113 are spaced apart in the second direction Y.

[0142] Furthermore, in the embodiment of the present application, the position of the reinforcement 20 relative to the mounting hole 113 is restricted and adjusted so that in the third direction Z, the projection of the reinforcement 20 is located outside the projection of the mounting hole 113, that is, the reinforcement 20 is arranged to avoid the mounting hole 113. This design can reduce the risk of deformation and damage at the second part 112 with the help of the reinforcement 20 without affecting the connection reliability between the second part 112 and the electrical entity at the mounting hole 113.

[0143] In some embodiments, Figure 4 As shown, the first portion 111 includes a reinforcing rib structure 114 disposed in the first accommodating portion K21 , and the reinforcing rib structure 114 divides the first accommodating portion K21 into a plurality of accommodating sub-portions K211 , and a plurality of reinforcing members 20 are disposed in the plurality of accommodating sub-portions K211 .

[0144] The reinforcing rib structure 114 is a rib-like structure arranged in the first accommodating portion K21 to reinforce the first part 111. The first accommodating portion K21 can be provided with only one reinforcing rib structure 114, or can also be provided with multiple reinforcing rib structures 114, wherein one or more reinforcing rib structures 114 can divide the first accommodating portion K21 into multiple accommodating sub-portions K211.

[0145] Furthermore, the embodiment of the present application respectively arranges multiple reinforcement members 20 in multiple different accommodating sub-portions K211, so that the first portion 111 can share stress with the help of the reinforcement portions at the corresponding positions of different accommodating sub-portions K211, thereby further reducing the risk of deformation and damage of the first portion 111, improving the structural reliability of the first portion 111, and improving the protection effect of the first portion 111 on the battery cells located in the accommodating space K1.

[0146] It should be noted that only one reinforcement 20 may be provided in a single accommodating sub-portion K211, or multiple reinforcements 20 may be provided, and the number of reinforcements 20 in different accommodating sub-portions K211 may be the same or different. In addition, for the second portion 112, optionally, the second portion 112 may also be provided with reinforcement ribs, and the second accommodating portion K22 may be divided into multiple sub-portions by the reinforcement ribs, and then the multiple reinforcements 20 may be arranged in the multiple sub-portions of the second accommodating portion K22.

[0147] In some embodiments, a dimension of the first receiving portion K21 in the first direction X is not less than twice a dimension of the reinforcement member 20 in the first direction X.

[0148] The second direction Y is the extension direction of the second part 112, and the first direction X is the width direction of the second part 112. On this basis, the embodiment of the present application limits the size of the reinforcement 20 so that the second accommodating portion K22 can accommodate at least two rows of reinforcements 20 in the width direction of the second part 112. In this way, with the help of multiple rows of reinforcements 20, it is helpful to further improve the stress dispersion transmission effect of the reinforcement 20, thereby further reducing the risk of deformation and damage of the first part 111, improving the structural reliability of the first part 111, and the protection effect of the first part 111 on the battery monomer located in the accommodating space K1.

[0149] Second, as Figure 1 As 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.

[0150] 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.

[0151] In some embodiments, the plurality of side beams 11 include a first side beam 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 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 reinforcement 20 is disposed in the first side beam 11a.

[0152] In the embodiment of the present application, the first side beam 11a is connected and fixed to the main body of the electrical 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 electrical device. In view of this, by setting at least part of the reinforcement 20 in the first side beam 11a, the first side beam 11a can be structurally strengthened, 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.

[0153] According to some embodiments of the present application, Figures 1 to 4 As shown, the battery device 100 includes a battery cell, a box body 10 and a plurality of reinforcement members 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. A receiving cavity K2 is provided inside at least one side beam 11. The plurality of reinforcement members 20 are provided in the receiving cavity K2 and fixed to the side beams 11. The reinforcement members 20 include a spherical structure.

[0154] The battery device 100 also includes a filling portion 30 disposed in the accommodating cavity K2 and filled between adjacent reinforcements 20. The reinforcement 20 is fixed to the side beam 11 through the filling portion 30. The filling portion 30 is bonded and fixed to the reinforcement 20. The material of the reinforcement 20 includes at least one of steel, aluminum and carbon fiber.

[0155] 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 20 is disposed in the first side beam 11a.

[0156] The first side beam 11a includes a first portion 111 and a second portion 112 protruding along the first direction X on the side of the first portion 111 away from the accommodating space K1. The accommodating cavity K2 includes a first accommodating portion K21 located in the first portion 111 and a second accommodating portion K22 located in the second portion 112. Part of the reinforcement 20 is arranged in the first accommodating portion K21, and part of the reinforcement 20 is arranged in the second accommodating portion K22. The second portion 112 has a mounting hole 113 that is arranged through along the third direction Z. The first direction X, the second direction Y and the third direction Z intersect with each other. In the third direction Z, the projection of the reinforcement 20 is located outside the projection of the mounting hole 113.

[0157] The first portion 111 includes a reinforcing rib structure 114 disposed in the first accommodation portion K21, the reinforcing rib structure 114 divides the first accommodation portion K21 into a plurality of accommodation sub-portions K211, and a plurality of reinforcing members 20 are disposed in the plurality of accommodation sub-portions K211. The dimension of the first accommodation portion K21 in the first direction X is not less than twice the dimension of the reinforcing member 20 in the first direction X.

[0158] 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 receiving space for receiving the battery cells, and a receiving cavity is provided inside at least one of the side beams; A plurality of reinforcement members, disposed in the accommodating cavity and fixed to the side beam, at least a portion of an outer surface of the reinforcement member is a curved surface, and the reinforcement member includes a spherical structure; A filling portion is arranged in the accommodating cavity and filled between adjacent reinforcement members, and the reinforcement member is fixed to the side beam through the filling portion.

2. The battery device according to claim 1, characterized in that: The filling portion is bonded and fixed to the reinforcement member.

3. The battery device according to claim 1, characterized in that: The maximum diameter of the spherical surface corresponding to the arc surface is D1, and D1 satisfies: 3mm≤D1≤10mm.

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

5. The battery device according to claim 1, characterized in that: The reinforcement member includes a body portion, and the body portion has a cavity inside.

6. The battery device according to claim 5, characterized in that: The reinforcement member further includes a reinforcement portion disposed in the cavity, wherein the density of the reinforcement portion is lower than the density of the main body portion.

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

8. The battery device according to claim 1, characterized in that: The material of the reinforcement includes at least one of steel, aluminum and carbon fiber.

9. 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 is disposed within the first side beam.

10. The battery device according to claim 9, 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.

11. The battery device according to claim 9, 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 accommodating cavity includes a first accommodating portion located in the first portion, and a second accommodating portion located in the second portion, and at least a portion of the reinforcement is disposed in the first accommodating portion.

12. The battery device according to claim 11, characterized in that: Part of the reinforcement is disposed in the second accommodating portion, the second portion has a mounting hole extending through the second portion along a third direction, and the first direction, the second direction and the third direction intersect each other; In the third direction, a projection of the reinforcement member is located outside a projection of the mounting hole.

13. The battery device according to claim 11, characterized in that: The first part includes a reinforcing rib structure arranged in the first accommodating portion, the reinforcing rib structure divides the first accommodating portion into a plurality of accommodating sub-portions, and the plurality of reinforcing members are arranged in the plurality of accommodating sub-portions.

14. The battery device according to claim 11, characterized in that: A dimension of the first accommodation portion in the first direction is not less than twice a dimension of the reinforcement member in the first direction.

15. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 14.

16. The electrical device according to claim 15, 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, and the first side beam is connected to the power-consuming body. And at least part of the reinforcement is disposed in the first side beam.

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