Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and a power utilization device, the battery device is used for accommodating a battery monomer component, the battery device comprises a box body, a first beam and the battery monomer component, the battery monomer component is accommodated in the box body, the first beam is arranged in the box body and is adjacent to the battery monomer component, the first beam extends along a first direction, and the second beam extends along a second direction. A reinforcing structure is arranged on one side of the first beam in the second direction, the first direction is perpendicular to the second direction, and the second direction is the thickness direction of the first beam. The reinforcing structure comprises a first reinforcing rib, the first reinforcing rib is in a long strip shape, and the first reinforcing rib extends in the first direction. According to the battery device disclosed by the utility model, by arranging the reinforcing structure, the structural strength of the first beam is favorably improved, so that the expansion of the battery monomers is inhibited to a certain extent, the drawing or shearing effect of expansion stress on the connection position of the first beam and the box body is reduced, and the risk of failure of the weak connection position of the first beam and the box body is reduced as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] In the related art, a first beam is provided in the box body to resist the expansion of the battery cell. The structural strength of the first beam is relatively strong, but the strength of the connection between the first beam and the box body is relatively weak, and failure often occurs at the connection point, resulting in a decrease in the structural reliability of the box body and the battery device, making it difficult to effectively suppress the expansion of the battery cell, which will affect the performance and service life of the battery device in the long term. Utility Model Content

[0003] In view of the above problems, the present invention provides a battery device, which can reduce the force acting on the connection between the box body and the first beam, so that the connection between the first beam and the box body is more reliable.

[0004] In the first aspect, the utility model provides a battery device, including a box body, a battery cell assembly and a first beam, the battery cell assembly is accommodated in the box body, the first beam is arranged in the box body and is arranged adjacent to the battery cell assembly, the first beam extends along a first direction, and a reinforcement structure is provided on one side of the first beam along a second direction, the first direction is perpendicular to the second direction, the second direction is the thickness direction of the first beam, the reinforcement structure includes a first reinforcement rib, the first reinforcement rib is a long strip, and the first reinforcement rib extends along the first direction.

[0005] In the above technical solution, the provision of a reinforcement structure helps improve the structural strength of the first beam, thereby enhancing the first beam's ability to resist the expansion of the battery cell assembly. This, to a certain extent, inhibits the expansion of the battery cells, reduces the pulling or shearing effects of the expansion stress on the connection between the first beam and the housing, and minimizes the risk of failure at the weak connection between the first beam and the housing. The second direction is the direction in which the first beam primarily bears stress. The provision of the first reinforcement rib extending along the first direction helps to increase the area of ​​influence of the first reinforcement rib and enhance the first beam's ability to resist stress along the second direction.

[0006] In some embodiments, the first reinforcing rib protrudes in a direction away from the battery cell assembly.

[0007] In the above technical solution, by arranging a first reinforcing rib protruding in a direction away from the second end face on the first end face, the occupation of the cavity inside the beam body by the first reinforcing rib can be reduced, thereby reducing the impact on the energy absorption effect of the cavity.

[0008] In some embodiments, a plurality of the first reinforcing ribs are spaced apart along the first direction, the battery cell assembly includes a plurality of rows of battery cells, the plurality of rows of battery cells are arranged sequentially along the first direction, and along the second direction, each row of battery cells is arranged opposite to at least one of the first reinforcing ribs.

[0009] In the above technical solution, along the first direction, each row of battery cells is arranged opposite to at least one first reinforcing rib. When the battery cells expand, the corresponding first reinforcing ribs can absorb the deformation caused by the expansion of the battery cells and reduce the expansion force caused by the expansion of the battery cells.

[0010] In some embodiments, along the first direction, two ends of the battery cell extend beyond two ends of the corresponding first reinforcing rib.

[0011] In the above technical solution, the first reinforcing rib is provided at the middle position of the corresponding battery cell, which is beneficial to improving the resistance effect of the first beam to the expansion stress of the battery cell.

[0012] In some embodiments, the box body includes a bottom wall, the first beam includes a beam body and a first flange, and the first flange connects the beam body and the bottom wall.

[0013] In the above technical solution, the first flange connects the beam body and the bottom wall, which can increase the connection area between the first beam and the bottom wall of the box body and improve the connection effect between the first beam and the box body.

[0014] In some embodiments, the reinforcement structure further includes: a second reinforcement rib, which is provided at a connection position between the first flange and the beam body.

[0015] In the above technical solution, the second reinforcing rib is arranged at the connection position between the first flange and the beam body, which can increase the connection strength between the first flange and the beam body, reduce the risk of fracture at the connection between the first flange and the beam body after the battery cell assembly expands, and increase the connection strength at the connection position between the first beam and the box body.

[0016] In some embodiments, the second reinforcing rib is in the shape of an elongated strip and extends along the first direction.

[0017] In the above technical solution, the second reinforcing rib is long and extends along the first direction, which can better support the beam body and further reduce the problem that the beam body tilts away from the battery cell assembly after being subjected to the expansion force of the battery cell assembly.

[0018] In some embodiments, the reinforcement structure further includes: a third reinforcement rib, the third reinforcement rib connecting the first flange and the second reinforcement rib, and along the second direction, the third reinforcement rib is arranged on a side of the second reinforcement rib away from the beam body.

[0019] In the above technical solution, the third reinforcing rib can further increase the strength of the second reinforcing rib, better support the beam body, and reduce the problem of the beam body tilting away from the battery cell assembly after being subjected to the expansion force of the battery cell assembly.

[0020] In some embodiments, the reinforcement structure also includes: a connecting structure, which is arranged on the side of the beam body along the third direction facing away from the bottom wall, and the first direction, the second direction and the third direction are perpendicular to each other; along the second direction, the thickness of the first beam at the position where the connecting structure is provided is H, and the thickness of the part of the beam body where the reinforcement structure is not provided is H1, and satisfies: H>H1.

[0021] In the above technical solution, the thickness of the first beam at the position where the connection structure is provided is H, and the thickness of the portion of the beam body where no reinforcement structure is provided is H, and the following condition is satisfied: H>H. This increases the thickness of the first beam at the position where the connection structure is provided, strengthens the strength of the first beam at the position where the connection structure is provided, and is beneficial to improving the deformation resistance of the first beam, thereby reducing the degree of deformation of the first beam caused by the expansion stress of the battery cell assembly, thereby reducing the stress generated by the deformation of the first beam at the connection position between the first beam and the box body, reducing the risk of failure at the connection position, improving the overall strength of the connection between the first beam and the box body, and enhancing the stability and safety performance of the battery device and the battery cell assembly therein.

[0022] In some embodiments, 20 mm ≤ H ≤ 30 mm.

[0023] In the above technical solution, the connection strength of the connection structure can be met, and at the same time the space occupied by the first beam in the box can be reduced, thereby reducing the impact on the arrangement of components such as the battery cell assembly in the box.

[0024] In some embodiments, the first beam includes: a beam body, the beam body extending along the first direction, the two end faces of the beam body along the second direction being a first end face and a second end face respectively, at least a portion of the reinforcement structure is provided on the first end face, and along the second direction, the second end face faces the battery cell assembly.

[0025] In the above technical solution, the reinforcement structure can resist the extrusion of the first beam by the expansion stress generated by the battery cell assembly, thereby reducing the risk of the first end surface being broken or damaged due to the extrusion of the battery cell assembly.

[0026] In some embodiments, two first beams are provided, and the two first beams are arranged opposite to each other along the second direction, and the battery cell assembly is located between the two first beams. The battery device also includes: multiple steel belts, which are provided at one end of the first beam facing away from the bottom wall of the box body, and the steel belts extend along the second direction and connect the two first beams. The steel belts are provided at the end of each group of battery cells along the first direction.

[0027] In the above technical solution, the steel strip cooperates with the connection structure to limit the battery cell assembly while meeting the connection strength of the connection structure, increasing the connection strength between the steel strip and the first beam, and making the connection between the steel strip and the first beam more reliable.

[0028] In a second aspect, the present invention provides an electrical device, comprising: the above-mentioned battery device.

[0029] In the above technical solution, the provision of a reinforcement structure helps improve the structural strength of the first beam, thereby enhancing the first beam's resistance to the expansion of the battery cell assembly. This, to a certain extent, suppresses the expansion of the battery cells, reduces the pulling or shearing effects of the expansion stress on the connection between the first beam and the housing, and minimizes the risk of failure at the weak connection between the first beam and the housing. The second direction is the direction in which the first beam primarily bears stress. The provision of the first reinforcement rib extending along the first direction helps increase the area of ​​influence of the first reinforcement rib and enhances the first beam's resistance to stress along the second direction.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 is a perspective view of a first beam according to some embodiments of the present invention;

[0033] Figure 2 is a perspective view of a box body and a first beam according to some embodiments of the present invention;

[0034] Figure 3 is a perspective view of a battery device according to some embodiments of the present invention;

[0035] Figure 4 is a perspective view of a battery device according to some embodiments of the present invention with a battery cell assembly removed;

[0036] Figure 5is a schematic diagram of a battery device according to some embodiments of the present invention;

[0037] Figure 6 Schematic diagram of an electrical device according to some embodiments of the present invention.

[0038] Reference numerals:

[0039] 1000. Electrical devices;

[0040] 100. Battery device;

[0041] 1. First beam; 11. First end face; 12. Second end face; 13. Beam body; 14. First flange; 141. Connecting portion; 15. Reinforcement structure; 151. First reinforcing rib; 152. Second reinforcing rib; 153. Third reinforcing rib; 154. Connecting structure; 16. Second flange;

[0042] 2. Box body; 21. Accommodation space; 211. First cavity; 212. Second cavity; 213. Third cavity; 22. Bottom wall; 23. Side wall;

[0043] X, first direction; Y, second direction; Z, third direction;

[0044] 20. Battery cell assembly; 201. Battery cell; 30. Steel strip;

[0045] 200. Car body. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification of the application of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The terms "including" and "having" and any variations thereof in the specification and claims of this utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0048] Reference to an "embodiment" in this disclosure means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0049] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0050] In this application, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0051] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of the present invention, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are for illustrative purposes only and do not constitute any limitation on the present invention.

[0052] The term “plurality” used in this invention refers to two or more (including two).

[0053] In the embodiments of the present invention, unless otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form a new technical solution.

[0054] In the embodiments of the present invention, unless otherwise specified, all technical features and optional technical features of the present invention can be combined with each other to form a new technical solution.

[0055] In embodiments of the present invention, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or parallel via a busbar. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a battery cell assembly may be a battery module, which is formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0056] The battery device may be a battery pack, which includes a housing and one or more battery cell assemblies housed within the housing. The battery cell assemblies may be battery modules, which may be housed within the housing by securing the battery module within the housing. Alternatively, the battery cell assembly may be housed within the housing by directly securing multiple battery cells to the housing.

[0057] In an embodiment of the present invention, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to accommodate the battery cell assembly. Enclosed herein means covered or closed, and may be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame to form an enclosed space within the housing to accommodate the battery cell assembly.

[0058] In an embodiment of the present invention, 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 crossbeam and longitudinal beam of the vehicle.

[0059] In the embodiments of the present invention, the battery cells may be secondary batteries, which are batteries that can be recharged to activate the active materials after discharge and continue to be used. The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of the present invention are not limited to this. The battery cells may be cylindrical, flat, rectangular, or other shapes, and the embodiments of the present invention are not limited to this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of the present invention are not limited to this.

[0060] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As the application of power batteries continues to expand, market demand is also growing.

[0061] In the related art, the structural strength of the first beam is relatively strong, but the strength of the connection between the first beam and the box body is relatively weak, and failure often occurs at the connection, resulting in a decrease in the structural reliability of the battery device and difficulty in effectively suppressing the expansion of the battery cell, which will affect the performance and service life of the battery device in the long term.

[0062] Based on this, the present invention proposes a battery device that can reduce the force acting on the connection between the box body and the first beam, thereby making the connection between the first beam and the box body more reliable.

[0063] In the aforementioned battery device, the battery device includes a housing, a battery cell assembly, and a first beam. The first beam is connected to the housing at a relatively weak connection. The battery cell assembly is disposed within the housing and on the side of the first beam away from the reinforcing structure. The battery cell assembly abuts the first beam. During operation, the battery cell assembly is susceptible to expansion due to heat, changes in air pressure, and other factors, particularly in the later stages of a battery cycle. The reinforcing structure absorbs the deformation caused by the battery cell assembly's expansion, thereby suppressing the expansion of the battery cell to a certain extent and distributing the tensile or shear stress directly at the connection between the first beam and the housing, thereby minimizing the risk of failure at the weak connection between the first beam and the housing. Reducing the tilting deformation of the first beam caused by the expansion of the battery cell assembly can reduce some of the expansion force and lessen the force acting at the connection between the housing and the first beam.

[0064] The battery device disclosed in the embodiments of the present invention can be used in electrical equipment that uses the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. In addition to being used in vehicles, the battery device can also be used in, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0065] The power-consuming device disclosed in the embodiments of the present invention 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 is provided inside the vehicle, and the battery device may be provided at the bottom, head or tail of the vehicle. The battery device may be used to power the vehicle, for example, the battery device may serve as an operating power source for the vehicle. The vehicle may further include a controller and a motor, and the controller is used to control the battery device to power the motor, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present invention, the battery device may serve not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0066] Reference below Figures 1-4 A battery device 100 according to an embodiment of the present invention is described.

[0067] refer to Figure 3 In a first aspect, the present invention provides a battery device 100 comprising a housing 2, a battery cell assembly 20, and a first beam 1. The battery cell assembly 20 is housed within the housing 2, which protects the battery cell assembly 20 from damage. The first beam 1 is disposed within the housing 2 and adjacent to the battery cell assembly 20. The first beam 1 can limit the position of the battery cell assembly 20 to a certain extent, thereby increasing the positional reliability of the battery cell assembly 20. The first beam 1 extends along a first direction X. A reinforcement structure 15 is provided on one side of the first beam 1 along a second direction Y. The second direction Y is the thickness direction of the first beam 1, and the first direction X is perpendicular to the second direction Y.

[0068] Specifically, the first beam 1 is disposed within the box body 2 and connected to the box body 2. The battery cell assembly 20 abuts against the first beam 1. The battery cell assembly 20 is prone to expansion during operation due to heat generation, pressure changes, and other issues. In particular, the battery cell 201 is more prone to expansion in the later stages of the cycle.

[0069] In some embodiments, reference Figure 1 The reinforcing structure 15 includes a first reinforcing rib 151. The first reinforcing rib 151 is in a long strip shape and extends along the first direction X.

[0070] In the above-described technical solution, the provision of the reinforcement structure 15 helps improve the structural strength of the first beam 1, thereby enhancing the first beam 1's resistance to the expansion of the battery cell assembly 20. This, to a certain extent, suppresses the expansion of the battery cell 201, reduces the pulling or shearing effect of the expansion stress on the connection between the first beam 1 and the housing 2, and minimizes the risk of failure at the weak connection between the first beam 1 and the housing 2. The second direction Y is the direction in which the first beam 1 primarily bears stress. The provision of the first reinforcement rib 151 extending along the first direction X helps increase the area of ​​influence of the first reinforcement rib 151 and enhances the first beam 1's resistance to stress along the second direction Y.

[0071] In some embodiments, reference Figure 1 The first beam 1 includes a beam body 13, which extends along the first direction X. The two end faces of the beam body 13 along the second direction Y are respectively a first end face 11 and a second end face 12. At least a portion of the reinforcing structure 15 is provided on the first end face 11. Along the second direction Y, the second end face 12 faces the battery cell assembly 20.

[0072] The second end face 12 is in contact with the battery cell assembly 20. When the battery cell assembly 20 expands, the battery cell assembly 20 squeezes the second end face 12. The reinforcing structure 15 can resist the squeezing of the first beam 1 by the expansion stress generated by the battery cell assembly 20, thereby reducing the risk of the first beam 1 being broken or damaged due to the squeezing of the battery cell assembly 20. At the same time, at least a portion of the reinforcing structure 15 is provided on the first end face 11, which can minimize the deformation of the beam body 13 caused by the expansion deformation of the battery cell assembly 20, thereby reducing the risk of problems such as disengagement at the connection position between the first beam 1 and the box body 2.

[0073] At the same time, the battery cell assembly 20 and the reinforcement structure 15 are arranged on both sides of the beam body 13 along the second direction Y, so that the reinforcement structure 15 is separated from the battery cell assembly 20, which is beneficial to reducing the risk of stress concentration caused by squeezing the reinforcement structure 15 when the battery cell assembly 20 expands, thereby reducing the risk of the battery cell assembly 20 being squeezed and deformed.

[0074] In the above technical solution, the reinforcement structure 15 can resist the compression of the first beam 1 by the expansion stress generated by the battery cell assembly 20 , thereby reducing the risk of the first end surface 11 being broken or damaged due to the compression of the battery cell assembly 20 .

[0075] Furthermore, the first reinforcing ribs 151 are multiple and spaced apart. The multiple first reinforcing ribs 151 spaced apart can improve the deformation resistance of the first beam 1 at multiple positions, and further improve the effect of the first beam 1 in resisting stress along the second direction Y.

[0076] In some embodiments, reference Figure 1The first reinforcing rib 151 protrudes in a direction away from the battery cell assembly 20 .

[0077] The beam body 13 typically has a cavity, within which a support structure can be added. This support structure is a bent structure, with each end connected to the beam body 13, forming an integral structure with the first end face 11 and the second end face 12. This cavity not only reduces the weight of the first beam 1 but also provides a certain degree of energy absorption, reducing deformation of the first beam 1 when subjected to external impact. Furthermore, the rigidity of the first beam 1 is enhanced by providing a reinforcement member within the cavity of the beam body 13. The reinforcement member can be connected to the beam body 13 by welding.

[0078] In the above technical solution, by providing a first reinforcing rib 151 protruding in a direction away from the second end face 12 on the first end face 11, the occupation of the cavity inside the beam body 13 by the first reinforcing rib 151 can be reduced, thereby reducing the impact on the energy absorption effect of the cavity.

[0079] In some embodiments, reference Figure 1 The multiple first reinforcing ribs 151 include multiple groups of first reinforcing ribs 151 spaced apart along the third direction Z, each group of first reinforcing ribs 151 includes multiple first reinforcing ribs 151 spaced apart along the first direction X, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0080] The multiple groups of first reinforcing ribs 151 spaced apart along the third direction Z can provide reinforcement for the beam body 13 at multiple locations along the third direction Z, thereby improving the deformation resistance of the first beam 1 at multiple locations along the third direction Z. Furthermore, each group of first reinforcing ribs 151 includes multiple first reinforcing ribs 151 spaced apart along the first direction X, so that each group of first reinforcing ribs 151 can improve the deformation resistance of the first beam 1 at multiple locations along the first direction X, thereby improving the overall deformation resistance of the first beam 1.

[0081] In this embodiment, the third direction Z is the height direction of the first beam 1 .

[0082] In the above technical solution, by providing multiple groups of first reinforcing ribs 151 spaced apart along the third direction Z, each group of first reinforcing ribs 151 includes multiple first reinforcing ribs 151 spaced apart along the first direction X. This can improve the deformation resistance of the first beam 1 at multiple locations in the third direction Z, and can improve the overall deformation resistance of the first beam 1 at multiple locations in the first direction X, so that the deformation resistance of the first beam 1 can be improved at multiple locations.

[0083] In some embodiments, reference Figures 1-4, multiple first reinforcing ribs 151 are arranged at intervals along the first direction X, the battery cell assembly 20 includes multiple rows of battery cells 201, and the multiple rows of battery cells 201 are arranged in sequence along the first direction X. Along the second direction Y, each row of battery cells 201 is arranged opposite to at least one first reinforcing rib 151.

[0084] Specifically, each row of battery cells 201 includes multiple battery cells 201 arranged in sequence along the second direction Y. The multiple battery cells 201 arranged in sequence along the second direction Y are connected into a row of battery cells 201 through connecting components such as connecting bars, and the multiple rows of battery cells 201 arranged in sequence along the first direction X are then electrically connected.

[0085] When any row of battery cells 201 expands, the first reinforcing ribs 151 are present to absorb the deformation caused by the expansion of the battery cells 201, reduce the expansion force caused by the expansion of the battery cells 201, and reduce the force acting on the connection between the connecting portion 141 and the box body 2.

[0086] In the above technical solution, along the first direction X, each row of battery cells 201 is arranged opposite to at least one first reinforcing rib 151. When the battery cell 201 expands, the corresponding first reinforcing rib 151 can absorb the deformation caused by the expansion of the battery cell 201, reduce the expansion force caused by the expansion of the battery cell 201, and reduce the force acting on the connection between the connecting portion 141 and the box body 2.

[0087] In some embodiments, reference Figure 1-Figure 3 , along the first direction X, both ends of the battery cell 201 extend beyond both ends of the corresponding first reinforcing rib 151 .

[0088] That is, along the first direction X, the first reinforcing rib 151 is disposed in the middle of the corresponding battery cell 201. When the battery cell 201 expands, the middle of the battery cell 201 expands more than the edge positions. The first reinforcing rib 151 is disposed in the middle of the corresponding battery cell 201, which helps to improve the first beam 1's ability to resist the expansion stress of the battery cell 201.

[0089] In the above technical solution, the first reinforcing rib 151 is provided at the middle position of the corresponding battery cell 201 , which is beneficial to improving the resistance of the first beam 1 to the expansion stress of the battery cell 201 .

[0090] In some embodiments, reference Figure 1 The box body 2 includes a bottom wall 22 , and the first beam 1 also includes a beam body 13 and a first flange 14 , and the first flange 14 connects the beam body 13 and the bottom wall 22 .

[0091] Specifically, the box body 2 includes a bottom wall 22 and a side wall 23 . The bottom wall 22 and the side wall 23 together define an accommodating space 21 for accommodating the battery cell assembly 20 . The first beam 1 is disposed in the accommodating space 21 .

[0092] In the above technical solution, the first flange 14 connects the beam body 13 and the bottom wall 22 , which can increase the connection area between the first beam 1 and the bottom wall 22 of the box body 2 and improve the connection effect between the first beam 1 and the box body 2 .

[0093] In some embodiments, both ends of the beam body 13 along the first direction X are provided with second flanges 16 .

[0094] It can be understood that both ends of the beam body 13 along the first direction X are provided with a second flange 16, the first flange 14 can be used to connect with the bottom wall 22 of the box body 2, and the second flange 16 can be used to connect with the side wall 23 of the box body 2, which can increase the connection area between the first beam 1 and the box body 2 and improve the connection effect between the first beam 1 and the box body 2.

[0095] The locations of the first flange 14 and the second flange 16 can be selected according to the required connection strength between the first beam 1 and the box body 2 to meet different usage requirements.

[0096] At the same time, along the second direction Y, the second flange 16 extends away from the beam body 13 , which can increase the connection area between the second flange 16 and the side wall 23 of the box body 2 and improve the assembly reliability of the battery device 100 .

[0097] In some embodiments, the first flange 14 and the second flange 16 are both provided on the side of the beam body 13 away from the second end face 12. The second end face 12 is constructed as a relatively flat plane, which reduces the protrusions on the second end face 12, reduces the possibility of the protrusions squeezing the battery cell assembly 20, and reduces the risk of damage to the battery cell assembly 20. When processing and manufacturing the first beam 1, problems such as the need to change the processing surface when manufacturing the first beam 1 can be reduced. For example, when the first beam 1 is stamped, the first reinforcing rib 151 is provided on the first end face 11 and protrudes in a direction away from the second end face 12. The first flange 14 and the second flange 16 are provided on the end of the beam body 13 away from the second end face 12. The first end face 11 can be provided on the processing base of the punch press. The processing of the first beam 1 can be achieved by stamping from the second end face 12 to the first end face 11, thereby improving the processing efficiency of the first beam 1.

[0098] In some embodiments, reference Figure 1 The reinforcement structure 15 further includes a second reinforcement rib 152 , which is provided at a connection position between the first flange 14 and the beam body 13 .

[0099] The connection between the first beam 1 and the housing 2 is often where stress is concentrated. Therefore, the connection interface and the surrounding area can become structural weaknesses and often fail first in actual structural strength simulations and measurements. The second reinforcing ribs 152 strengthen the connection between the first flange 14 and the beam body 13, reducing the risk of deformation and fracture at the connection between the first flange 14 and the beam body 13 after expansion of the battery cell assembly 20, thereby increasing the strength of the connection between the first beam 1 and the housing 2.

[0100] In the above technical solution, the second reinforcing rib 152 is arranged at the connection position between the first flange 14 and the beam body 13, which can increase the connection strength between the first flange 14 and the beam body 13, reduce the risk of fracture at the connection between the first flange 14 and the beam body 13 after the battery cell assembly 20 expands, and increase the connection strength of the connection position between the first beam 1 and the box body 2.

[0101] In some embodiments, reference Figure 1 The second reinforcing rib 152 is long and extends along the first direction X.

[0102] The second reinforcing ribs 152 are provided at the base of the first beam 1 where it connects to the box body 2. The second reinforcing ribs 152 are elongated and extend along the first direction X. They can better support the beam body 13 and further reduce the risk of the beam body 13 tipping away from the battery cell assembly 20 due to the expansion force of the battery cell assembly 20. For example, at least one second reinforcing rib 152 can have a shape similar to a triangular support, which can support the first beam 1 and reduce the risk of the first beam 1 tipping away from the battery cell assembly 20 due to the expansion force of the battery cell assembly 20.

[0103] In the above technical solution, the second reinforcing rib 152 is long and extends along the first direction X, which can better support the beam body 13 and further reduce the problem that the beam body 13 is tilted away from the battery cell assembly 20 after being subjected to the expansion force of the battery cell assembly 20.

[0104] In some embodiments, reference Figure 1 The reinforcement structure 15 further includes a third reinforcement rib 153 , which connects the first flange 14 and the second reinforcement rib 152 , and is disposed on a side of the second reinforcement rib 152 away from the beam body 13 .

[0105] The third reinforcing ribs 153 can further increase the strength of the second reinforcing ribs 152 , thereby better supporting the beam body 13 and reducing the problem that the beam body 13 tilts away from the battery cell assembly 20 after being subjected to the expansion force of the battery cell assembly 20 .

[0106] For example, the second reinforcing rib 152 is arranged at one end of the beam body 13 close to the first flange 14 and extends along the first direction X, and the third reinforcing rib 153 is arranged between the second reinforcing rib 152 extending along the first direction X and the first flange 14, which can improve the strength of the second reinforcing rib 152 extending along the first direction X, further improve the supporting effect of the second reinforcing rib 152 on the beam body 13, and increase the reliability of the position of the first beam 1.

[0107] In the above technical solution, the third reinforcing rib 153 can further increase the strength of the second reinforcing rib 152, which can better support the beam body 13 and reduce the problem that the beam body 13 tilts away from the battery cell assembly 20 after being subjected to the expansion force of the battery cell assembly 20.

[0108] In some embodiments, reference Figure 1 The reinforcement structure 15 further includes a connecting structure 154, which is disposed on a side of the beam body 13 facing away from the bottom wall 22 along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. Along the second direction Y, the thickness of the first beam 1 at the location where the connecting structure 154 is disposed is H, and the thickness of the portion of the beam body 13 not provided with the reinforcement structure 15 is H1, satisfying the following: H>H1.

[0109] The connection structure 154 can be used to connect with other components of the battery device 100, and further limit the battery cell assembly 20 through other components, thereby reducing the risk of the battery cell assembly 20 escaping from the box body 2 and increasing the position reliability of the battery cell assembly 20; and, other components can work together with the first beam 1 to restrain the expansion of the battery cell 201, thereby reducing the degree of expansion of the battery cell 201 during use.

[0110] Among them, the other component may be a steel belt 30 .

[0111] Along the second direction Y, the thickness of the first beam 1 at the position where the connecting structure 154 is provided is H, and the thickness of the portion of the beam body 13 where the reinforcing structure 15 is not provided is H1, and the following conditions are satisfied: H>H1, that is, the thickness of the first beam 1 at the position where the connecting structure 154 is provided is greater than the thickness of the portion of the beam body 13 where the reinforcing structure 15 is not provided. While meeting the connection strength of the connecting structure 154, the thickness of the beam body 13 is reduced, and the volume grouping efficiency and energy density of the battery device 100 are higher, thereby increasing the efficiency of the battery device 100.

[0112] At the same time, in this embodiment, the connecting structure 154 can be used to connect to the steel belt 30 of the battery device 100. The connecting structure 154 is connected to the steel belt 30. When the steel belt 30 is subjected to force, it pulls the first beam 1, and the stress is concentrated at the position of the connecting structure 154. Thickening the position of the connecting structure 154 is beneficial to reducing the risk of deformation at the stress concentration point.

[0113] In the above technical solution, the thickness of the first beam 1 at the position where the connection structure 154 is provided is H, and the thickness of the portion of the beam body 13 where no reinforcement structure 15 is provided is H1, and the condition H>H1 is satisfied. This increases the thickness of the first beam 1 at the position where the connection structure 154 is provided, and strengthens the strength of the first beam 1 at the position where the connection structure 154 is provided, thereby improving the deformation resistance of the first beam 1 and reducing the degree of deformation of the first beam 1 due to the expansion stress of the battery cell assembly 20. This reduces the stress generated at the connection position between the first beam 1 and the box body 2 due to the deformation of the first beam 1, reduces the risk of failure at the connection position, improves the overall strength of the connection between the first beam 1 and the box body 2, and enhances the stability and safety performance of the battery device 100 and the battery cell assembly 20 therein.

[0114] In some embodiments, reference Figure 1 , along the second direction Y, the thickness of the first beam 1 at the position where the connecting structure 154 is provided is H and satisfies: 20 mm ≤ H ≤ 30 mm.

[0115] It is understood that the thickness of the first beam 1 at the location where the connection structure 154 is located along the second direction Y can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, or 30 mm. The thickness of the first beam 1 at the location where the connection structure 154 is located along the second direction Y is no less than 20 mm, which can ensure the connection strength of the connection structure 154. The thickness of the first beam 1 at the location where the connection structure 154 is located along the second direction Y is no more than 30 mm, which can reduce the space occupied by the first beam 1 within the housing 2 and reduce the impact on the layout of components such as the battery cell assembly 20 within the housing 2.

[0116] In the above technical solution, the connection strength of the connection structure 154 can be met, and at the same time, the space occupied by the first beam 1 in the box body 2 can be reduced, thereby reducing the impact on the arrangement of components such as the battery cell assembly 20 in the box body 2.

[0117] In some embodiments, reference Figure 1 The first flange 14 includes a connecting portion 141, which is provided at an end of the first flange 14 away from the second end face 12, and the connecting portion 141 is used to connect to the box body 2. The first beam 1 includes a beam body 13, and the beam body 13 extends along the first direction X. The two end faces of the beam body 13 along the second direction Y are respectively the first end face 11 and the second end face 12. At least part of the reinforcing structure 15 is provided on the first end face 11, and the connecting portion 141 is provided on the side of the reinforcing structure 15 away from the second end face 12.

[0118] Along the second direction Y, the battery cell 201 is arranged on one side of the second end surface 12 of the first beam 1 , and the connecting portion 141 is arranged on the side of the first flange 14 away from the second end surface 12 , that is, the connecting portion 141 is arranged on the side of the first flange 14 away from the battery cell assembly 20 .

[0119] The reinforcement structure 15 is beneficial to improving the deformation resistance of the first beam 1, so as to reduce the degree of deformation of the first beam 1 due to the expansion stress of the battery cell assembly 20, thereby reducing the stress generated at the connection position between the first beam 1 and the box body 2 due to the deformation of the first beam 1, reducing the risk of failure at the connection position, and improving the overall strength of the connection between the first beam 1 and the box body 2.

[0120] In this embodiment, the connection portion 141 and the box body 2 can be connected by welding, screwing, riveting, gluing, etc. to meet different design requirements, as long as the connection strength between the connection portion 141 and the box body 2 is met.

[0121] In some embodiments, reference Figure 2-Figure 4 There are two first beams 1, and the two first beams 1 are arranged opposite to each other along the second direction Y. The battery cell assembly 20 is located between the two first beams 1. The battery device 100 also includes a plurality of steel belts 30. The steel belt 30 is provided at one end of the first beam 1 away from the bottom wall 22 of the box body 2. The steel belt 30 extends along the second direction Y and connects the two first beams 1. The steel belt 30 is provided at the end of each group of battery cells 201 along the first direction X.

[0122] The two first beams 1 can separate the internal storage space 21 of the box body 2 into a first cavity 211, a second cavity 212, and a third cavity 213 arranged sequentially along the second direction Y. The second cavity 212 is used to accommodate the battery cell assembly 20, and the first cavity 211 and / or the third cavity 213 can be used to accommodate electrical components. The steel strip 30 is used to restrain the battery cell assembly 20 at the end of the first beam 1 facing away from the bottom wall 22 of the box body 2, reducing the risk of the battery cell assembly 20 escaping from the second cavity 212.

[0123] The first beam 1 and the steel belt 30 can be connected by fastener connection, welding or riveting.

[0124] In the above technical solution, the steel strip 30 cooperates with the connecting structure 154 to meet the connection strength of the connecting structure 154 while limiting the battery cell assembly 20, thereby increasing the connection strength between the steel strip 30 and the first beam 1, making the connection between the steel strip 30 and the first beam 1 more reliable.

[0125] Secondly, refer to Figure 5 and Figure 6 The present invention provides an electrical device 1000 , comprising: a battery device 100 according to an embodiment of the first aspect of the present invention.

[0126] The power-consuming device 1000 may be a vehicle, and the battery device 100 may be installed at the bottom of the vehicle body 200 .

[0127] In the above-described technical solution, the provision of the reinforcement structure 15 helps improve the structural strength of the first beam 1, thereby enhancing the first beam 1's resistance to the expansion of the battery cell assembly 20. This, to a certain extent, suppresses the expansion of the battery cell 201, reduces the pulling or shearing effect of the expansion stress on the connection between the first beam 1 and the housing 2, and minimizes the risk of failure at the weak connection between the first beam 1 and the housing 2. The second direction Y is the direction in which the first beam 1 primarily bears stress. The provision of the first reinforcement rib 151 extending along the first direction X helps increase the area of ​​influence of the first reinforcement rib 151 and enhances the first beam 1's resistance to stress along the second direction Y.

[0128] Refer to the following Figures 1-4 A battery device 100 according to some embodiments of the present invention is described.

[0129] Reference Figures 1-4 In this embodiment, the first beam 1 is arranged in the box body 2, and the box body 2 can accommodate the battery cell assembly 20. The first beam 1 includes a beam body 13, a first flange 14 and a second flange 16. The beam body 13 extends along the length direction of the first beam 1. The two end faces of the beam body 13 along the thickness direction of the first beam 1 are respectively a first end face 11 and a second end face 12. At least a portion of the reinforcement structure 15 is provided on the first end face 11. The battery cell assembly 20 is provided on the side of the first beam 1 where the second end face 12 is provided. The second end face 12 of the first beam 1 in contact with the battery cell assembly 20 is relatively smooth, thereby reducing the risk of the reinforcement structure 15 directly contacting the battery cell assembly 20 when the battery cell assembly 20 expands, and reducing the risk of the reinforcement structure 15 damaging the battery cell assembly 20.

[0130] The first flange 14 and the second flange 16 are provided at the end of the beam body 13 where the reinforcement structure 15 is provided. The first flange 14 can be spaced apart from the battery cell assembly 20, reducing the risk of the battery cell assembly 20 being blocked by the first flange 14 during assembly and increasing the assembly reliability of the battery device 100. The beam body 13 is provided with a second flange 16 at both ends along the length of the first beam 1. The box body 2 includes a bottom wall 22, and the first beam 1 also includes the beam body 13 and the first flange 14. The first flange 14 connects the beam body 13 and the bottom wall 22. The first flange 14 and the second flange 16 can be used to connect to the bottom wall 22 and side wall 23 of the box body 2, respectively, thereby increasing the connection area between the first beam 1 and the box body 2 and improving the connection effect between the first beam 1 and the box body 2.

[0131] The first beam 1 is connected to the sidewall 23 of the housing 2 at both ends along its length. A reinforcement structure 15 is provided on one side of the first beam 1 along its thickness, and a battery cell assembly 20 is provided on the other side. Two first beams 1 are provided, one at each end of the battery cell assembly 20 along its thickness. The battery device 100 also includes multiple steel strips 30, which are provided at the ends of the first beams 1 facing away from the bottom wall 22 of the housing 2. The steel strips 30 extend along the thickness of the first beam 1 and connect the two first beams 1. The steel strips 30 are provided at the ends of each group of battery cells 201 along its length. The two first beams 1 can divide the internal storage space 21 of the housing 2 into a first cavity 211, a second cavity 212, and a third cavity 213, arranged sequentially along the second direction Y. The second cavity 212 is used to accommodate the battery cell assembly 20, and the first cavity 211 and / or the third cavity 213 can be used to accommodate electrical components. The steel strip 30 is used to position the battery cell assembly 20 at one end of the first beam 1 away from the bottom wall 22 of the box body 2 , thereby reducing the risk of the battery cell assembly 20 escaping from the second cavity 212 .

[0132] The reinforcement structure 15 includes a first reinforcement rib 151 , a second reinforcement rib 152 , a third reinforcement rib 153 and a connecting structure 154 .

[0133] The first reinforcing ribs 151 are elongated and extend along the first direction X. The multiple first reinforcing ribs 151 include multiple groups of first reinforcing ribs 151 spaced apart along the width of the first beam 1. Each group of first reinforcing ribs 151 includes multiple first reinforcing ribs 151 spaced apart along the length of the first beam 1. This improves the deformation resistance of the first beam 1 at multiple locations along the width and length of the first beam 1, thereby improving the deformation resistance of the first beam 1 at multiple locations. The first reinforcing ribs 151 protrude away from the second end surface 12, reducing the occupancy of the first reinforcing ribs 151 within the cavity of the beam body 13 and reducing the impact on the energy absorption of the cavity. The battery cell assembly 20 includes multiple rows of battery cells 201, which are arranged sequentially along the length of the first beam 1. Each row of battery cells 201 along the length of the first beam 1 is equipped with a corresponding first reinforcing rib 151. When any row of battery cells 201 expands, the first reinforcing ribs 151 are present to absorb the deformation caused by the expansion of the battery cells 201, reducing the expansion force caused by the expansion of the battery cells 201 and reducing the force acting on the connection between the connecting portion 141 and the casing 2. Along the length of the first beam 1, the first reinforcing ribs 151 are located in the middle of the corresponding battery cells 201. When the battery cells 201 expand, the middle of the battery cells 201 expand more than the edge positions. The placement of the first reinforcing ribs 151 in the middle of the battery cells 201 helps to improve the first beam 1's resistance to the expansion stress of the battery cells 201.

[0134] The second reinforcing rib 152 is arranged at the connection position between the first flange 14 and the beam body 13. The second reinforcing rib 152 can increase the connection strength between the first flange 14 and the beam body 13, reduce the risk of fracture at the connection between the first flange 14 and the beam body 13 after the battery cell assembly 20 expands, and increase the connection strength of the connection position between the first beam 1 and the box body 2.

[0135] A second reinforcing rib 152 extends along the length of the first beam 1. Located at the base of the first beam 1 where it connects to the housing 2, it supports the beam body 13 and reduces the risk of the beam body 13 tipping away from the battery cell assemblies 20 due to the expansion force of the battery cell assemblies 20. For example, at least one second reinforcing rib 152 may resemble a triangular support, supporting the first beam 1 and reducing the risk of the beam body 13 tipping away from the battery cell assemblies 20 due to the expansion force of the battery cell assemblies 20. A third reinforcing rib 153 is located between the first flange 14 and the second reinforcing rib 152, on the side of the second reinforcing rib 152 away from the beam body 13. This further increases the strength of the second reinforcing rib 152, providing better support for the beam body 13 and reducing the risk of the beam body 13 tipping away from the battery cell assemblies 20 due to the expansion force of the battery cell assemblies 20.

[0136] The connecting structure 154 is provided on the second end 17. The battery device 100 further includes a plurality of steel strips 30. The steel strips 30 are provided at one end of the first beam 1 facing away from the bottom wall 22 of the box body 2 and are connected to the connecting structure 154 via fasteners. The steel strips 30 extend along the thickness direction of the first beam 1 and connect the two first beams 1. The steel strips 30 are provided at the end of each row of battery cells 201 along the length direction of the first beam 1.

[0137] The steel strip 30 cooperates with the connecting structure 154 to restrain the battery cell assembly 20 while also ensuring the connection strength of the connecting structure 154. This increases the strength of the connection between the steel strip 30 and the first beam 1, making the connection more reliable. The connecting structure 154 protrudes along the width of the first beam 1 toward the side away from the first flange 14 and along the thickness of the first beam 1 toward the side away from the second end surface 12. This increases the thickness of the first beam 1 at the location where the connecting structure 154 is located, thereby strengthening the strength of the first beam 1 at this location. This improves the deformation resistance of the first beam 1, reducing the degree of deformation of the first beam 1 caused by the expansion stress of the battery cell assembly 20. This reduces the stress generated by the deformation of the first beam 1 at the connection between the first beam 1 and the housing 2, reducing the risk of failure at this connection location, and improving the overall strength of the connection between the first beam 1 and the housing 2, thereby enhancing the stability and safety of the battery device 100 and the battery cell assembly 20 therein.

[0138] Along the thickness direction of the first beam 1, the thickness of the first beam 1 at the location where the connection structure 154 is provided is H, and the thickness of the portion of the beam body 13 not provided with the reinforcement structure 15 is H1, and the following condition is satisfied: H>H1. The thickness of the first beam 1 at the location where the connection structure 154 is provided is 30 mm. The thickness of the first beam 1 at the location where the connection structure 154 is provided is greater than the thickness of the portion of the beam body 13 not provided with the reinforcement structure 15. This reduces the thickness of the beam body 13 while maintaining the connection strength of the connection structure 154. This results in higher volumetric efficiency and energy density of the battery device 100, thereby increasing the efficiency of the battery device 100.

[0139] The first flange 14 includes a connecting portion 141, which is used to connect to the box body 2. The connecting portion 141 is arranged at the end of the first flange 14 away from the second end face 12, that is, the connecting portion 141 is arranged on the side of the reinforcing structure 15 away from the battery cell assembly 20. When the battery cell assembly 20 expands, the reinforcing structure 15 is first affected by the deformation and force caused by the expansion and deformation of the battery cell assembly 20, and the stress directly exerted on the connection position between the first beam 1 and the box body 2 is dispersed, thereby reducing the risk of failure at the connection position and improving the overall strength of the connection between the first beam 1 and the box body 2.

[0140] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0141] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: Box (2); A battery cell assembly (20), the battery cell assembly (20) being accommodated in the box (2); a first beam (1), the first beam (1) being arranged in the box body (2) and adjacent to the battery cell assembly (20), the first beam (1) extending along a first direction, a reinforcing structure (15) being provided on one side of the first beam (1) along a second direction, the first direction being perpendicular to the second direction, and the second direction being a thickness direction of the first beam (1); The reinforcement structure (15) comprises a first reinforcement rib (151), the first reinforcement rib (151) is in a long strip shape, and the first reinforcement rib (151) extends along the first direction.

2. The battery device according to claim 1, wherein: The first reinforcing rib (151) protrudes in a direction away from the battery cell assembly (20).

3. The battery device according to claim 1, wherein: A plurality of the first reinforcing ribs (151) are arranged at intervals along the first direction, the battery cell assembly (20) comprises a plurality of rows of battery cells (201), the plurality of rows of battery cells (201) are arranged in sequence along the first direction, and along the second direction, each row of battery cells (201) is arranged opposite to at least one of the first reinforcing ribs (151).

4. The battery device according to claim 3, characterized in that Along the first direction, two ends of the battery cell (201) extend beyond two ends of the corresponding first reinforcing rib (151).

5. The battery device according to claim 1, wherein: The box body (2) includes a bottom wall (22), the first beam (1) includes a beam body (13) and a first flange (14), and the first flange (14) connects the beam body (13) and the bottom wall (22).

6. The battery device according to claim 5, characterized in that The reinforcement structure (15) further comprises: A second reinforcing rib (152), the second reinforcing rib (152) being provided at a connection position between the first flange (14) and the beam body (13).

7. The battery device according to claim 6, characterized in that The second reinforcing rib (152) is in the shape of an elongated strip and extends along the first direction.

8. The battery device according to claim 6, characterized in that The reinforcement structure (15) further comprises: A third reinforcing rib (153) is provided, wherein the third reinforcing rib (153) connects the first flange (14) and the second reinforcing rib (152), and along the second direction, the third reinforcing rib (153) is provided on a side of the second reinforcing rib (152) away from the beam body (13).

9. The battery device according to claim 5, characterized in that The reinforcement structure (15) further comprises: a connecting structure (154), the connecting structure (154) being provided on a side of the beam body (13) facing away from the bottom wall (22) along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; Along the second direction, the thickness of the first beam (1) at the position where the connection structure (154) is provided is H, and the thickness of the portion of the beam body (13) not provided with the reinforcement structure (15) is H1, and the following condition is satisfied: H>H1.

10. The battery device according to claim 9, characterized in that 20mm≤H≤30mm.

11. The battery device according to any one of claims 1 to 10, characterized in that: The first beam (1) comprises: A beam body (13) is provided, wherein the beam body (13) extends along the first direction, and the two end faces of the beam body (13) along the second direction are respectively a first end face (11) and a second end face (12), at least a portion of the reinforcement structure (15) is provided on the first end face (11), and along the second direction, the second end face (12) faces the battery cell assembly (20).

12. The battery device according to any one of claims 1 to 10, characterized in that: Two first beams (1) are provided, the two first beams (1) are arranged opposite to each other along the second direction, the battery cell assembly (20) is located between the two first beams (1), and the battery device further comprises: A plurality of steel strips (30), wherein the steel strips (30) are provided at one end of the first beam (1) facing away from the bottom wall (22) of the box body (2), the steel strips (30) extend along the second direction and connect the two first beams (1), and the steel strips (30) are provided at the end of each group of battery cells (201) along the first direction.

13. An electrical device, characterized in that: A battery device comprising the battery device according to any one of claims 1 to 12.

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