Battery device and electric equipment

Abstract

The invention relates to the technical field of battery equipment, and discloses a battery device and electric equipment. The battery device comprises battery monomers, a box body, two first mounting structures and at least one reinforcing structure, the plurality of battery monomers are accommodated in the box body, the box body comprises a bottom wall and two opposite first side walls, the two first side walls are respectively connected to two opposite side edges of the bottom wall, the two first mounting structures are in one-to-one correspondence with the two first side walls, and the reinforcing structure is arranged between the two first mounting structures and the two first side walls. The two first mounting structures are fixedly connected to the box body, the reinforcing structure comprises a first support and a first reinforcing plate, the first reinforcing plate is fixedly connected with the first side wall, the first support is fixedly connected with the side, away from the first side wall, of the first reinforcing plate, and the first support is fixedly connected with the first mounting structures. In addition, the electric equipment comprises the battery device to provide electric energy. By applying the technical scheme, the problem of thermal runaway risk caused by short circuit due to large deformation when the mounting structure of the battery device and the side wall of the box body are subjected to side collision or side external force extrusion is solved.

Description

Technical Field

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

[0002] At present, battery devices are assembled and fixed to electrical equipment using a mounting structure, wherein the mounting structure is arranged on the outer wall of the battery device's housing. Among them, the mounting structure is mostly sheet metal and has weak structural strength. In addition, since the battery device's housing is generally a thin-walled box, when the battery device is hit or squeezed by external forces, especially when it is hit from the side or squeezed from the side by external forces, the mounting structure and the side walls of the housing will be greatly deformed, causing the battery cells inside the battery device to be deformed by the impact or squeeze, resulting in an internal short circuit in the battery cells, or causing the electrical components inside the battery device to be damaged or short-circuited by the impact or squeeze, ultimately causing the risk of thermal runaway inside the battery device. Summary of the Invention

[0003] The purpose of this application is to provide a battery device and electrical equipment, aiming to solve the problem of the risk of thermal runaway caused by short circuit when the mounting structure and the side wall of the box of the battery device are greatly deformed by side collision or lateral external force.

[0004] To achieve the above objectives, according to a first aspect of an embodiment of the present application, a battery device is provided, comprising a battery cell, a housing, two first mounting structures, and at least one reinforcement structure. The housing has a storage space in which a plurality of battery cells are accommodated. The housing comprises a bottom wall and two opposing first side walls, the two first side walls being connected to opposite side edges of the bottom wall, the first side walls extending along a first direction, the two first mounting structures corresponding one to the two first side walls, the two first mounting structures being fixedly connected to the housing and protruding from the first side walls along a second direction, the reinforcement structure being fixedly connected to the first side walls, and at least a portion of one reinforcement structure being fixedly connected to one of the first mounting structures. The reinforcement structure comprises a first bracket and a first reinforcement plate, the first reinforcement plate being fixedly connected to a side of the first side wall facing away from the storage space, the first bracket being fixedly connected to a side of the first reinforcement plate facing away from the first side wall, and the first bracket being fixedly connected to the first mounting structure. The first direction is the length direction of the battery device, the second direction is the width direction of the battery device, and the first direction is perpendicular to the second direction.

[0005] The battery device provided in the embodiments of the present application is mainly mounted on an electrical device via a first mounting structure, thereby providing electrical energy to the electrical load of the electrical device. Two first mounting structures are fixedly connected to the housing, and the two first mounting structures correspond to the two first side walls, respectively, and protrude from the first side walls along the second direction. A reinforcing structure is provided to improve the structural strength of the assembly structure between the first mounting structure and the first side wall, thereby improving the impact resistance of the first mounting structure and the first side wall. Thus, when the battery device is subjected to a side collision or lateral external force extrusion, the first mounting structure and the first side wall are unlikely to deform or deform less, reducing or even avoiding impact or extrusion on the battery cells, thereby reducing the probability of damage to the battery cells due to impact or extrusion, or the risk of thermal runaway caused by internal short circuits, thereby improving the safety of the battery device. The first mounting structure is reinforced and connected to the first side wall by a first bracket and a first reinforcing plate, which helps to improve the structural strength of the assembly structure between the first mounting structure and the first side wall.

[0006] In some embodiments, the first mounting structure includes a first mounting plate, a second mounting plate, and a plurality of first mounting sleeves. The first mounting plate and the second mounting plate are spaced apart along a third direction. The first mounting plate and the second mounting plate are both fixedly connected to the housing. The first mounting sleeve is fixedly connected to both the first mounting plate and the second mounting plate. The plurality of first mounting sleeves are spaced apart along the first direction. The first bracket and the first reinforcement plate are positioned between the first mounting plate, the second mounting plate, and the first mounting sleeve. The first bracket is fixedly connected to the first mounting plate or the second mounting plate. The third direction is a height direction of the battery device, and the first, second, and third directions are perpendicular to each other. The reinforcement structure strengthens the assembly structure between the first mounting structure and the first side wall, thereby improving the structural strength of the assembly structure between the first mounting structure and the first side wall.

[0007] In some embodiments, the first reinforcing plate includes a first curved portion, a first connecting portion, and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively connected to the ends of the first curved portion along the third direction, and the first connecting portion and the second connecting portion are both fixedly connected to the box body, with the first curved portion protruding in a direction away from the first side wall. The first bracket includes a first connecting segment and a second connecting segment connected by a bend, wherein the first connecting segment is fixedly connected to the first curved portion, and the second connecting segment is fixedly connected to the first mounting plate or the second mounting plate. This design structure is conducive to improving the structural strength of the first reinforcing plate, thereby facilitating the structural strength of the assembly structure between the first side wall and the first mounting structure.

[0008] In some embodiments, the first bracket is an integrally formed component, and the first bracket extends along the first direction; and / or the first reinforcing plate is an integrally formed component.

[0009] In some embodiments, the first reinforcing plate is connected to a plurality of first brackets at intervals along the first direction.

[0010] In some embodiments, the plurality of first brackets correspond one-to-one to the plurality of first mounting sleeves.

[0011] In some embodiments, the first mounting plate and the second mounting plate are both provided with a plurality of mounting ears corresponding one-to-one to the plurality of first mounting sleeves, and the second connecting section of the first bracket extends between the mounting ears of the stacked first mounting plate and the mounting ears of the second mounting plate.

[0012] In some embodiments, the first mounting plate is fixedly connected to the bottom wall and / or the first mounting plate is fixedly connected to the first side wall near the bottom wall, the second mounting plate is fixedly connected to the first side wall, and the second connecting section is fixedly connected to the first mounting plate.

[0013] In some embodiments, the second mounting plate is provided with a collapse guide recessed toward the first mounting plate and extending along a first direction. The collapse guide reduces energy transferred to the housing and battery cells, thereby reducing the probability of damage to the battery cells due to impact or compression, or the risk of thermal runaway caused by internal short circuits, thereby improving the safety of the battery device.

[0014] In some embodiments, the reinforcement structure further includes a second reinforcement plate fixedly connected to a side of the first sidewall facing the accommodation space, the second reinforcement plate being spaced apart from the battery cell. The second reinforcement plate cooperates with the first reinforcement plate to further enhance the structural strength of the first sidewall.

[0015] In some embodiments, the battery device further includes a first insulating cushion, which is sandwiched and fixed between the second reinforcing plate and the battery cell. The first insulating cushion can further reduce the energy transferred to the battery cell, thereby further reducing the probability of damage to the battery cell due to impact or compression, or the risk of thermal runaway caused by internal short circuit.

[0016] In some embodiments, the box further includes two opposing second side walls, both of which are connected to the bottom wall, and the two first side walls and the two second side walls are alternately connected end to end to enclose a storage space. The battery device includes two end crossbeams disposed within the storage space, the two end crossbeams being spaced apart, the ends of the end crossbeams being connected to the two second reinforcing plates, and the end crossbeams being insulated from the battery cells. The two second reinforcing plates are joined together by the two end crossbeams, that is, the end crossbeams support the ends of the second reinforcing plates, thereby improving the second reinforcing plates' ability to resist impact or compression.

[0017] In some embodiments, the battery device further includes two second brackets, each corresponding to the two end crossbeams. The second brackets include a second curved portion, a third connecting portion, and a fourth connecting portion. The third connecting portion, the second curved portion, and the fourth connecting portion are sequentially connected. The third connecting portion and the fourth connecting portion are both fixedly connected to the box body, and the second curved portion is fixedly connected to the end crossbeams. In this way, the end crossbeams can enhance the structural strength of the second sidewall and improve the second sidewall's ability to resist positive collision impact or positive external force extrusion.

[0018] In some embodiments, the end crossbeam includes a beam body and a reinforcing connection portion connected to the beam body, the reinforcing connection portion protruding along the first direction toward the second side wall, the fourth connection portion fixedly connected to the bottom wall, the third connection portion fixedly connected to the second side wall, the second curved portion fixedly connected to the reinforcing connection portion, and the beam body is connected to two second reinforcing plates at both ends along the second direction. This facilitates the connection operation between the second curved portions of the second bracket, thereby improving assembly efficiency.

[0019] According to a second aspect of an embodiment of the present application, an electric device is provided, wherein the electric device includes the aforementioned battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. 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 any creative work.

[0021] Figure 1 This is a schematic diagram of the battery device according to an embodiment of the present application. Figure 1 ; Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle; Figure 3 This is a schematic diagram of the battery device according to an embodiment of the present application. Figure 2 , in which the box cover, battery cells and electrical components were disassembled; Figure 4 1 is a top view of a battery device according to an embodiment of the present application, wherein the cover, battery cells, and electrical components are removed; Figure 5 for Figure 4 Schematic cross-sectional view in the middle BB direction; Figure 6 for Figure 4 Schematic cross-sectional view in the CC direction; Figure 7 for Figure 4Schematic cross-sectional view in the middle DD direction; Figure 8 This is an exploded schematic diagram of the first mounting plate, the second mounting plate, the first mounting sleeve, the first reinforcing plate, and the first bracket of the battery device according to an embodiment of the present application; Figure 9 A schematic structural diagram of a second mounting plate of a first mounting structure of a battery device according to an embodiment of the present application; Figure 10 This is a schematic structural diagram of an electrical device according to an embodiment of the present application.

[0022] Among them, the reference numerals in the figures are: 100. Battery cell; 101. Battery cell assembly; 10. Box body; 11. First side wall; 12. Second side wall; 13. Bottom wall; 14. Accommodation space; 20. First mounting structure; 21. First mounting plate; 22. Second mounting plate; 221. Collapse guide; 23. First mounting sleeve; 24. Mounting ear; 30. Reinforcement structure; 31. First bracket; 311. First connecting section; 312. Second connecting section; 32. First reinforcing plate; 321. First curved portion; 322. First connecting portion; 323. Second connecting portion; 33. Second reinforcing plate; 41. First insulating cushion; 42. Second insulating cushion; 50. End beam; 51. Beam body; 52. Reinforced connection; 53. Electrical compartment space; 54. Electrical components; 60. Second bracket; 61. Second curved portion; 62. Third connecting portion; 63. Fourth connecting portion; 70. Bolt connection pair; 80. Second mounting structure; 81. Third mounting plate; 82. Fourth mounting plate; 83. Second mounting sleeve; 91. Bottom reinforcement plate; 92. Liquid cooling plate; 93. Box cover; 94. Middle crossbeam; 200. Battery device; 400, electrical equipment; 410, electrical load; 420, control device; 430, frame; 440, wheels; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0023] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0024] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0025] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0026] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0027] Currently, market developments indicate that battery applications are becoming increasingly widespread. Battery devices are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants (battery devices in these applications are generally referred to as energy storage batteries), but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in a variety of fields such as aerospace (battery devices in these applications are generally referred to as power batteries). As battery applications continue to expand, users are placing increasing emphasis on their safety performance.

[0028] In related technologies, battery devices are assembled and fixed to electrical equipment using a mounting structure, wherein the mounting structure is arranged on the outer wall of the battery device housing. The mounting structure is often made of sheet metal and has relatively weak structural strength. Furthermore, since the battery device housing is generally thin-walled, the mounting structure and the side walls of the housing can significantly deform when the battery device is subjected to a side collision or lateral external force. This can cause the battery cells inside the battery device to be deformed by the impact or compression, leading to internal short circuits in the battery cells and ultimately the risk of thermal runaway within the battery device.

[0029] Based on the above considerations, an embodiment of the present application provides a battery device, which is mainly mounted on an electrical device through a first mounting structure, and then provides electrical energy for the electrical load of the electrical device. The first mounting structure is fixedly connected to the outer wall of the first side wall of the box body, and the structural strength of the assembly structure between the first mounting structure and the first side wall is improved by setting a reinforcement structure, that is, the impact resistance of the first mounting structure and the first side wall is improved. In this way, when the battery device is subjected to a side collision or lateral external force extrusion, the first mounting structure and the first side wall are not easy to deform or deform less, reducing or even avoiding impact or extrusion on the battery cell, thereby reducing the probability of damage to the battery cell due to impact or extrusion or the risk of thermal runaway caused by internal short circuit, thereby improving the safety of the battery device.

[0030] In order to illustrate the technical solutions provided by the embodiments of the present application, the following is a detailed description with reference to specific drawings and embodiments.

[0031] like Figure 1 As shown, the first direction X is the length direction of the battery device 200, the second direction Y is the width direction of the battery device 200, and the third direction Z is the height direction of the battery device 200. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other, that is, the first direction X, the second direction Y, and the third direction Z constitute the directions of the three axes of the spatial rectangular coordinate system.

[0032] According to a first aspect of the embodiments of the present application, the embodiments of the present application provide a battery device 200. Figure 1 、 Figure 3 and Figure 4 As shown, the battery device 200 includes battery cells 100, a housing 10, two first mounting structures 20, and at least one reinforcement structure 30. The housing 10 has a storage space 14, in which multiple battery cells 100 are accommodated. The housing 10 includes two opposing first sidewalls 11, which extend along a first direction X and are spaced apart from the battery cells 100 (i.e., an air gap may be provided between the first sidewalls 11 and the battery cells 100 to form an insulation arrangement). The two first mounting structures 20 correspond one-to-one with the two first sidewalls 11. The two first mounting structures 20 are fixedly connected to the housing 10 and protrude from the first sidewalls 11 along a second direction Y. The reinforcement structure 30 is fixedly connected to the first sidewall 11, with at least a portion of each reinforcement structure 30 fixedly connected to each first mounting structure 20. The battery device 200 of this embodiment is provided with two reinforcement structures 30, each corresponding one-to-one with the two first mounting structures 20.

[0033] The battery device 200 provided in the embodiment of the present application is primarily mounted on an electrical device 400 via a first mounting structure 20, thereby providing electrical energy to the electrical load 410 of the electrical device 400. The two first mounting structures 20 are fixedly connected to the housing 10, with the first mounting structure 20 protruding from the first side wall 11 along the second direction Y. A reinforcing structure 30 is provided to enhance the structural strength of the assembly structure between the first mounting structure 20 and the first side wall 11, thereby enhancing the impact resistance of the first mounting structure 20 and the first side wall 11. Thus, when the battery device 200 is subjected to a side collision or lateral external force, the first mounting structure 20 and the first side wall 11 are unlikely to deform or deform only slightly, thereby reducing or even avoiding impact or extrusion on the battery cell 100. This reduces the probability of damage to the battery cell 100 due to impact or extrusion, or the risk of thermal runaway caused by an internal short circuit, thereby enhancing the safety of the battery device 200.

[0034] Among them, "the battery device 200 is subjected to a side collision" means that when the battery device 200 is being moved and transported, the direction along the moving and transporting direction is the forward direction, and the direction perpendicular to the moving and transporting direction is the lateral direction. Therefore, the collision action implemented on the battery device 200 from the side is a side collision. In contrast, the collision action implemented on the battery device 200 from the forward direction is a forward collision. And, "the battery device 200 is squeezed by a lateral external force" means that the external force squeezes the battery device 200 from the side. In comparison, a collision is an instantaneous, violent impact action, while squeezing is a relatively long, relatively gentle impact action relative to a collision. Therefore, the embodiments of the present application are described by taking the example of the first mounting structure 20 being subjected to a side collision or lateral external force squeezing.

[0035] The battery cell 100 may be a secondary battery. A secondary battery refers to a battery cell 100 that can be recharged to activate its active material after discharge, allowing for continued use. The battery cell 100 may 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-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, or the like. Therefore, when the battery cell 100 is subjected to impact or compression, there is a risk of internal short circuits caused by electrode sheets puncturing the insulating separator, or electrolyte leakage. Furthermore, the battery cell 100 is a square-shaped battery cell, also referred to as a square cell. Of course, the battery cell 100 may also be a cylindrical-shaped battery cell, also referred to as a cylindrical cell. The following description uses square cells as an example to assemble a battery device 200 (i.e., a square battery). The embodiment of assembling a battery device 200 using cylindrical cells can be specifically referred to as the embodiment of assembling a battery device 200 using square cells, and will not be further elaborated here.

[0036] In some embodiments, as Figure 1 、 Figure 3 、 Figure 5 and Figure 8 As shown, the reinforcement structure 30 includes a first bracket 31 and a first reinforcement plate 32. The first reinforcement plate 32 is fixedly connected to the side of the first side wall 11 away from the accommodating space 14. The first bracket 31 is fixedly connected to the side of the first reinforcement plate 32 away from the first side wall 11, and the first bracket 31 is fixedly connected to the first mounting structure 20. The first bracket 31 and the first reinforcement plate 32 reinforce the connection between the first mounting structure 20 and the first side wall 11, which helps to improve the structural strength of the assembly structure between the first mounting structure 20 and the first side wall 11. The reinforcement structure 30 is assembled in a split-type combined structure. The first reinforcement plate 32 is assembled with the first bracket 31. First, the first reinforcement plate 32 is fixedly connected to the first side wall 11, and then the first bracket 31 is fixedly connected to the first reinforcement plate 32. Finally, the first bracket 31 is fixedly connected to the first mounting structure 20, so that the assembly is completed quickly, which is conducive to improving assembly efficiency. In this embodiment, the split structure formed by the combination of the first bracket 31 and the first reinforcing plate 32 is relative to the reinforced structure 30 of the integral structure of the first bracket 31 and the first reinforcing plate 32 formed in one piece. The first bracket 31 and the first reinforcing plate 32 can be disassembled and moved and transported separately, which is lighter and more convenient, reduces the difficulty and strength of movement and transportation, and improves the efficiency of movement and transportation.

[0037] In some embodiments, the first bracket 31 and the first reinforcing plate 32 can be integrally formed, that is, the first bracket 31 and the first reinforcing plate 32 are two structural parts of a single integral component. In this way, when the reinforcing structure 30 is fixedly connected to the first side wall 11, only one connection operation is required, namely, fixing the first reinforcing plate 32 to the first side wall 11, thereby reducing the number of connection and assembly steps.

[0038] In some embodiments, as Figure 1 、 Figure 3 、 Figure 5 and Figure 8As shown, the first mounting structure 20 includes a first mounting plate 21, a second mounting plate 22, and a plurality of first mounting sleeves 23. The first mounting plate 21 and the second mounting plate 22 are spaced apart along the third direction Z, and are both fixedly connected to the housing 10. The first mounting sleeve 23 is fixedly connected to the first mounting plate 21 and the second mounting plate 22, and the plurality of first mounting sleeves 23 are spaced apart along the first direction X. The first bracket 31 and the first reinforcing plate 32 are located between the first mounting plate 21, the second mounting plate 22, and the first mounting sleeve 23, that is, the first bracket 31 and the first reinforcing plate 32 are accommodated in the accommodation space formed by the first mounting plate 21, the second mounting plate 22, the first mounting sleeve 23, and the first sidewall 11, and the first bracket 31 can be fixedly connected to the first mounting plate 21. In this manner, the assembly structure between the first mounting structure 20 and the first side wall 11 is reinforced by the reinforcement structure 30, thereby improving the structural strength of the assembly structure between the first mounting structure 20 and the first side wall 11. After the first reinforcement plate 32 and the first bracket 31 are sequentially fixedly connected to the first side wall 11, the first mounting plate 21 is fixedly connected to the box body 10, the first bracket 31 is fixedly connected to the first mounting plate 21, and the second mounting plate 22 is fixedly connected to the box body 10. Finally, the first mounting sleeve 23 is fixedly connected to the first mounting plate 21 and the second mounting plate 22. In this embodiment, the split structure formed by the first mounting plate 21, the second mounting plate 22, and the plurality of first mounting sleeves 23 allows the first mounting plate 21, the second mounting plate 22, and the plurality of first mounting sleeves 23 to be separated and transported separately, compared to the integrally formed first mounting structure 20. This makes the structure more lightweight and convenient, reduces the difficulty and strength of transportation, and improves transportation efficiency. In addition, since the first bracket 31 and the first reinforcement plate 32 are accommodated in the accommodation space formed by the first mounting plate 21, the second mounting plate 22, the first mounting sleeve 23 and the first side wall 11, that is, the connection position between the first bracket 31 and the first mounting plate 21 is located in the accommodation space, the split first mounting structure 20 is assembled in the above order, so that the connection position between the first bracket 31 and the first mounting plate 21 is easily accessible, reducing the assembly difficulty of fixedly connecting the first bracket 31 and the first mounting plate 21, and then the second mounting plate 22 and multiple first mounting sleeves 23 are assembled to form a accommodation space, so that the first bracket 31 and the first reinforcement plate 32 are accommodated in the accommodation space, which is conducive to improving assembly efficiency.

[0039] In other embodiments, the first bracket 31 may also be fixedly connected to the second mounting plate 22. In this embodiment, after the first reinforcing plate 32 and the first bracket 31 are fixedly connected to the first side wall 11 in sequence, the second mounting plate 22 is fixedly connected to the box body 10, and then the first bracket 31 and the second mounting plate 22 are fixedly connected. Then, the first mounting plate 21 is fixedly connected to the box body 10, and then the first mounting sleeve 23 is fixedly connected to the first mounting plate 21 and the second mounting plate 22.

[0040] The housing 10, first mounting plate 21, second mounting plate 22, first mounting sleeve 23, first bracket 31, and first reinforcement plate 32 are all made of the same metal material, such as steel. This allows the first reinforcement plate 32 to be secured to the first side wall 11, the first bracket 31 to the first reinforcement plate 32, the first bracket 31 to the first mounting plate 21 or the second mounting plate 22, and the first mounting sleeve 23 to the first mounting plate 21 or the second mounting plate 22 to be secured by welding, resulting in a stable and efficient connection. Alternatively, the first reinforcement plate 32 to the first side wall 11, the first bracket 31 to the first reinforcement plate 32, the first bracket 31 to the first mounting plate 21 or the second mounting plate 22, and the first mounting sleeve 23 to the first mounting plate 21 or the second mounting plate 22 can be secured by bolted connections.

[0041] In some embodiments, as Figure 5 As shown, the first reinforcing plate 32 includes a first curved portion 321, a first connecting portion 322, and a second connecting portion 323. The first connecting portion 322 and the second connecting portion 323 are respectively connected to the ends of the first curved portion 321. This design structure helps improve the structural strength of the first reinforcing plate 32, thereby improving the structural strength of the assembly between the first side wall 11 and the first mounting structure 20. The first connecting portion 322 and the second connecting portion 323 are both fixedly connected to the box body 10, and the first curved portion 321 protrudes away from the first side wall 11. The first bracket 31 includes a first connecting segment 311 and a second connecting segment 312 that are connected by a bend. The first connecting segment 311 is fixedly connected to the first curved portion 321, and the second connecting segment 312 is fixedly connected to the first mounting plate 21 or the second mounting plate 22. Furthermore, while maintaining the same structural strength, the first reinforcing plate 32 with this design structure is lighter than a solid first reinforcing plate 32, which helps reduce the overall weight of the battery device 200 and contributes to the goal of lightweighting the battery device 200.

[0042] In some embodiments, the first bracket 31 and the first reinforcement plate 32 are two independent components. The first bracket 31 is an integrally formed component and extends along the first direction X. The first bracket 31 and the first reinforcement plate 32 are also integrally formed components. The first bracket 31 and the first reinforcement plate 32 are each integrally formed from steel using a stamping process. The structural strength of the first bracket 31 and the first reinforcement plate 32 is stable and reliable, and the manufacturing efficiency is high.

[0043] In some embodiments, as Figure 1 、 Figure 3 and Figure 8 As shown, the first reinforcing plate 32 is connected to a plurality of first brackets 31 at intervals along the first direction X. The plurality of first brackets 31 can correspond one-to-one with the plurality of first mounting sleeves 23. In this embodiment, the first reinforcing plate 32 is a component integrally formed from steel material through a stamping process, and the first bracket 31 is formed into a first connecting section 311 and a second connecting section 312 through a bending process. In this embodiment, a plurality of first brackets 31 are used as the connecting structure between the first reinforcing plate 32 and the first mounting structure 20. While ensuring the connection strength, the use of a plurality of first brackets 31 can reduce the overall weight of the first bracket 31 compared to the use of an integrally formed first bracket 31, thereby reducing the overall weight of the battery device 200 and contributing to the goal of lightweighting the battery device 200.

[0044] In some embodiments, the plurality of first brackets 31 may not correspond one-to-one with the plurality of first mounting sleeves 23. The number of first mounting sleeves 23 may be greater than the number of first brackets 31, or the number of first brackets 31 may be greater than the number of first mounting sleeves 23, or the number of first mounting sleeves 23 may be equal to the number of first brackets 31, wherein the first brackets 31 and the first mounting sleeves 23 are staggered. In other embodiments, a portion of the plurality of first brackets 31 are provided in a one-to-one correspondence with at least some of the first mounting sleeves 23, and the remaining first brackets 31 are staggered with any one of the first mounting sleeves 23.

[0045] In some embodiments, as Figure 1 、 Figure 3 and Figure 8As shown, the first mounting plate 21 and the second mounting plate 22 are each provided with a plurality of mounting ears 24 corresponding one-to-one with the plurality of first mounting sleeves 23. When the first mounting plate 21 and the second mounting plate 22 are fixedly connected to the housing 10, the plurality of mounting ears 24 of the first mounting plate 21 and the plurality of mounting ears 24 of the second mounting plate 22 are stacked one-to-one. In this embodiment, the first reinforcing plate 32 is connected to a plurality of first brackets 31 spaced apart along the first direction X, and the second connecting sections 312 of the first brackets 31 extend between the stacked mounting ears 24 of the first mounting plate 21 and the second mounting plate 22. Compared with the continuous plate-shaped mounting ears, the first mounting plate 21 and the second mounting plate 22 of this embodiment have the material between two adjacent mounting ears 24 cut away while ensuring that the structural strength meets the requirements. This reduces the material usage of the first mounting plate 21 and the second mounting plate 22, helps reduce the overall weight of the battery device 200, and helps achieve the purpose of lightweighting the battery device 200.

[0046] In some embodiments, as Figure 1 、 Figure 3 and Figure 5 As shown, the box body 10 further includes a bottom wall 13, and the two first side walls 11 are respectively connected to the opposite side edges of the bottom wall 13. Figure 5 As shown, the first mounting plate 21 can be fixedly connected only to the bottom wall 13. Figure 5 As shown, the battery device 200 further includes a bottom reinforcing plate 91, which is disposed against the side of the bottom wall 13 facing away from the accommodating space 14. The bottom reinforcing plate 91 enhances the structural strength of the bottom wall 13, thereby combining the reinforcing structure 30 and the bottom reinforcing plate 91 to improve the overall structural strength of the box body 10. In order to further improve the connection strength between the first mounting plate 21 and the box body 10, as shown in FIG. Figure 5 As shown, the first mounting plate 21 is fixedly connected to the edge area between the bottom reinforcement plate 91 and the bottom wall 13, that is, the first mounting plate 21 is sandwiched between the bottom wall 13 and the bottom reinforcement plate 91. In this embodiment, the second mounting plate 22 is fixedly connected to the first side wall 11, and the second connecting section 312 is fixedly connected to the first mounting plate 21.

[0047] In other embodiments, the first mounting plate 21 may be fixedly connected to only a portion of the first side wall 11 close to the bottom wall 13 .

[0048] In yet other embodiments, the first mounting plate 21 is fixedly connected to the bottom wall 13, and the first mounting plate 21 is also fixedly connected to the first side wall 11 near the bottom wall 13. That is, the first mounting plate 21 can be fixedly connected to both the bottom wall 13 and the first side wall 11, thereby improving the connection strength between the first mounting plate 21 and the box body 10. Furthermore, the portion of the first mounting plate 21 fixedly connected to the bottom wall 13 is also fixedly connected to the bottom reinforcing plate 91 (that is, the portion of the first mounting plate 21 fixedly connected to the bottom wall 13 is sandwiched between the bottom wall 13 and the bottom reinforcing plate 91), thereby further improving the connection strength between the first mounting plate 21 and the box body 10.

[0049] In some embodiments, as Figures 3 to 5 、 Figure 8 and Figure 9 As shown, the second mounting plate 22 is provided with a crush guide portion 221, and the first bracket 31 is fixedly connected to the first mounting plate 21. The crush guide portion 221 is recessed toward the first mounting plate 21 and extends along the first direction X. Thus, when the battery device 200 is subjected to a side collision or lateral external force extrusion exceeding a certain level, the crush guide portion 221 provided on the second mounting plate 22 has a relatively weaker structural strength than the rest of the first mounting structure 20. As a result, the force of the side collision or lateral external force extrusion will first destroy the crush guide portion 221, thereby guiding the second mounting plate 22 to bend and deform in a direction away from the first mounting plate 21. Furthermore, because the second mounting plate 22 and the first mounting plate 21 are fixedly connected via the first mounting sleeve 23, the first mounting plate 21 bends and deforms along with the second mounting plate 22. This bending and deformation of the first and second mounting plates 21 and 22 absorbs most of the energy from a side collision or lateral external force. In other words, the collapse guide 221 reduces the energy that continues to be transmitted to the housing 10 and the battery cells 100, thereby reducing the probability of damage to the battery cells 100 due to impact or compression, or the risk of thermal runaway caused by internal short circuits, thereby improving the safety of the battery assembly 200.

[0050] In order to further enhance the structural strength of the first side wall 11, in some embodiments, such as Figures 1 to 3 、 Figure 5As shown, the reinforcement structure 30 also includes a second reinforcement plate 33, which is fixedly connected to the side of the first side wall 11 facing the accommodating space 14. The second reinforcement plate 33 is a component integrally formed from steel using a stamping process and is secured to the first side wall 11 by spot welding. Thus, the second reinforcement plate 33 cooperates with the first reinforcement plate 32 to further enhance the structural strength of the first side wall 11. Furthermore, the first bracket 31, first reinforcement plate 32, second reinforcement plate 33, first mounting plate 21, second mounting plate 22, and first mounting sleeve 23 cooperate to enhance the structural strength of the assembly between the first mounting structure 20 and the housing 10. In this embodiment, the second reinforcement plate 33 is spaced apart from the battery cell 100 (i.e., an air gap can be provided between the second reinforcement plate 33 and the battery cell 100 to form an insulating arrangement).

[0051] In some embodiments, as Figure 1 、 Figure 3 、 Figure 5 As shown, the battery device 200 also includes a first insulating buffer pad 41, which is sandwiched and fixed between the second reinforcing plate 33 and the battery cell 100, so that the second reinforcing plate 33 and the battery cell 100 are insulated. In addition, when the battery device 200 is subjected to a side collision or lateral external force extrusion, the impact or extrusion energy is absorbed and weakened by the first mounting structure 20, the reinforcing structure 30 and the first side wall 11, and the remaining energy continues to be transmitted to the first insulating buffer pad 41, and is absorbed and buffered by the first insulating buffer pad 41. Most of the remaining energy is absorbed and buffered. In other words, the first insulating buffer pad 41 can further reduce the energy transmitted to the battery cell 100, thereby further reducing the probability of the battery cell 100 being damaged or internally short-circuited due to impact or extrusion, causing thermal runaway.

[0052] The first insulating buffer pad 41 may be a component formed from polyurethane material.

[0053] Alternatively, in other embodiments, insulating adhesive is filled between the second reinforcing plate 33 and the battery cell 100. After the insulating adhesive cures, the second reinforcing plate 33 and the battery cell 100 are insulated. Furthermore, the insulating adhesive absorbs and buffers energy transmitted to the battery cell 100, thereby reducing impact or compression on the battery cell 100.

[0054] In some embodiments, as Figure 1As shown, a plurality of battery cells 100 are arranged as a plurality of battery cell assemblies 101, and the plurality of battery cell assemblies 101 are arranged along a first direction X. Among them, each battery cell assembly 101 may include a plurality of battery cells 100 arranged along a second direction; or, each battery cell assembly 101 may include only one battery cell 100. The battery device 200 also includes a plurality of second insulating buffer pads 42, and a second insulating buffer pad 42 is clamped and fixed between two adjacent battery cell assemblies 101. The adjacent battery cell assemblies 101 are insulated and separated by the second insulating buffer pads 42. In addition, the second insulating buffer pads 42 are squeezed and deformed when the battery cell 100 expands, thereby absorbing the expansion force of the battery cell 100 to a certain extent, slowing down and weakening the mutual expansion and squeezing of the battery cells 100 between adjacent battery cell assemblies 101, which is beneficial to extending the service life of the battery device 200. The second insulating buffer pads 42 can also insulate the adjacent battery cell assemblies 101 and reduce the heat transfer efficiency. As Figure 1 、 Figures 3 to 7 As shown, the battery assembly 200 further includes a liquid cooling plate 92, which is positioned against the side of the bottom wall 13 facing the receiving space 14. The battery cells 100 are secured to the liquid cooling plate 92 using structural adhesive. Coolant flows through the flow channels of the liquid cooling plate 92, absorbing and carrying away heat generated by the battery cells 100. This reduces the temperature and dissipates heat from the battery cells 100, ensuring stable thermal performance of the battery assembly 200.

[0055] In some embodiments, as Figures 1 to 3 、 Figure 6 and Figure 7 As shown, the box body 10 further includes two opposite second side walls 12, and the two first side walls 11 and the two second side walls 12 are alternately connected end to end to enclose a receiving space 14. Figure 3 、 Figures 5 to 7 As shown, the box body 10 further includes a bottom wall 13, and the two first side walls 11 and the two second side walls 12 are connected to the bottom wall 13, that is, the box body 10 is a square box body. Figures 1 to 4 、 Figure 6 and Figure 7 As shown, the battery device 200 includes two end crossbeams 50 disposed within the accommodating space 14. The two end crossbeams 50 are disposed within the accommodating space 14 in a one-to-one correspondence with the two second side walls 12. The end crossbeams 50 extend along the second direction Y, and the ends of the end crossbeams 50 are respectively connected to the two second reinforcing plates 33. In this way, the two second reinforcing plates 33 are combined together by the two end crossbeams 50, that is, the end crossbeams 50 support the ends of the second reinforcing plates 33, thereby improving the impact or extrusion resistance of the second reinforcing plates 33, and thus improving the impact or extrusion resistance of the first side wall 11.

[0056] like Figure 3 and Figure 4 As shown, in some embodiments, to further improve the overall impact or compression resistance of the battery device 200, the battery device 200 further includes a central crossbeam 94 disposed within the accommodating space 14. The central crossbeam 94 is located between the two end crossbeams 50, and both ends of the central crossbeam 94 along the second direction Y are fixedly connected to the two second reinforcing plates 33. The central crossbeam 94 supports the second reinforcing plates 33, the first sidewall 11, the first reinforcing plate 32, and the central portion of the first mounting structure 20, further improving the overall impact or compression resistance of the battery device 200.

[0057] In some embodiments, the end crossbeam 50 is a component formed of metal and is insulated from the battery cells 100. A second insulating cushion 42 is interposed between the end crossbeam 50 and the battery cell assembly 101 opposite it. The second insulating cushion 42 provides insulation between the end crossbeam 50 and the battery cell 100. Furthermore, when the battery assembly 200 is subjected to a positive collision or positive external force, the second sidewall 12 and the end crossbeam 50 initially resist and absorb most of the impact or compression energy. The remaining energy is then transferred to the second insulating cushion 42, where it is absorbed and buffered, thereby reducing the risk of thermal runaway caused by damage or internal short circuits in the battery cells 100 due to the positive collision or positive external force.

[0058] Alternatively, in other embodiments, insulating adhesive is filled between the end crossbeam 50 and the battery cell 100. After the insulating adhesive cures, the end crossbeam 50 and the battery cell 100 are insulated. Furthermore, the insulating adhesive absorbs and buffers the impact energy of a positive collision or positive external force transmitted to the battery cell 100, thereby reducing the impact or compression on the battery cell 100.

[0059] The thickness of the first side wall 11, the second side wall 12 and the bottom wall 13 is 0.5 mm to 2.0 mm, and they are all thin sheet metal walls. That is, the box body 10 is a sheet metal part with light weight and high structural strength.

[0060] In some embodiments, an electrical compartment space 53 is formed between one of the two end beams 50 and the corresponding second side wall 12. The electrical compartment space 53 is used to install electrical components 54. The electrical components 54 include a battery management system, a high-voltage box, etc. The electrical components 54 are electrically connected to the battery cell assembly 101. Figure 1As shown, the battery assembly 200 further includes a cover 93, which covers the housing 10. A gasket can be used to seal the cover 93 and the housing 10, reducing the probability of moisture seeping into the accommodating space 14 through the gap between the cover 93 and the housing 10 and causing a short circuit in the battery cells 100 or electrical components 54. Furthermore, the reinforcement structure 30 and end crossbeams 50 are provided to enhance the structural strength of the housing 10 and the first mounting structure 20. This reduces the probability of damage or internal short circuits in the electrical components 54 caused by collisions or external forces when the battery assembly 200 is impacted or squeezed.

[0061] In some embodiments, as Figure 6 and Figure 7 As shown, the battery device 200 further includes two second brackets 60, which correspond one-to-one to the two end crossbeams 50. The second brackets 60 include a second curved portion 61, a third connecting portion 62, and a fourth connecting portion 63. The third connecting portion 62, the second curved portion 61, and the fourth connecting portion 63 are sequentially connected. The third connecting portion 62 and the fourth connecting portion 63 are both fixedly connected to the box body 10, and the second curved portion 61 is fixedly connected to the end crossbeam 50. In this way, the end crossbeams 50 can enhance the structural strength of the second side wall 12 and improve the ability of the second side wall 12 to resist positive collision impact or positive external force extrusion.

[0062] In some embodiments, as Figure 6 and Figure 7 As shown, the end crossbeam 50 includes a beam body 51 and a reinforcement connection portion 52 connected to the beam body 51. The reinforcement connection portion 52 protrudes toward the second side wall 12 along the first direction X. The fourth connection portion 63 is fixedly connected to the bottom wall 13. The third connection portion 62 is fixedly connected to the second side wall 12. The second curved portion 61 is fixedly connected to the reinforcement connection portion 52. The two ends of the beam body 51 along the second direction Y are respectively connected to the two second reinforcement plates 33. The end crossbeam 50 with such a structure can facilitate the connection operation between the second curved portions 61 of the second bracket 60, thereby improving assembly efficiency. Figure 7 As shown, the second curved portion 61 and the third connecting portion 62 connect the end cross beam 50 with the bottom wall 13, thereby enhancing the structural strength of the bottom wall 13 through the end cross beam 50; and the second curved portion 61 and the fourth connecting portion 63 connect the end cross beam 50 with the second side wall 12, thereby enhancing the structural strength of the second side wall 12 through the end cross beam 50.

[0063] In some embodiments, the beam body 51 of the end cross beam 50 may be spaced apart from the bottom wall 13. In this case, the fourth connecting portion 63 is fixedly connected to the bottom wall 13, and the fourth connecting portion 63 is spaced apart from the beam body 51. In other embodiments, the beam body 51 of the end cross beam 50 may be fixedly connected to the bottom wall 13. In this case, the fourth connecting portion 63 is fixedly connected to the bottom wall 13, and the beam body 51 and the bottom wall 13 clamp and fix the fourth connecting portion 63 (the fourth connecting portion 63 may also be fixedly connected to the beam body 51; alternatively, the beam body 51 merely presses against the fourth connecting portion 63, but the four connecting portions 63 are not connected).

[0064] The end crossbeam 50 is a component integrally formed of aluminum alloy, i.e., extruded. The end crossbeam 50 has a multi-cavity anti-extrusion structure, which improves the collision energy absorption performance and extrusion resistance deformation capability of the end crossbeam 50. The second bracket 60 is a component integrally formed of steel material through a stamping process. Since the end crossbeam 50 and the second bracket 60 are made of different metal materials, welding the two is difficult. Therefore, Figure 7 As shown, the second bent portion 61 and the reinforcing connecting portion 52 are locked by a bolt connection pair 70. It can be understood that the end of the beam body 51 and the second reinforcing plate 33 are also locked by a bolt connection pair 70.

[0065] In some embodiments, as Figure 1 、 Figure 3 、 Figure 4 and Figure 6 As shown, the battery device 200 further includes a second mounting structure 80. The two second side walls 12 are respectively provided with at least one second mounting structure 80. Figure 4 As shown, a second sidewall 12 is provided with two spaced-apart second mounting structures 80. The second mounting structures 80 are fixedly connected to the side of the second sidewall 12 facing away from the accommodating space 14 and protrude from the second sidewall 12 along the first direction X. The battery assembly 200 is mounted and fixed to the electrical device 400 via the first mounting structure 20 and the second mounting structure 80, further enhancing the structural strength of the connection between the battery assembly 200 and the electrical device 400 and helping to improve the stability and reliability of the battery assembly 200 on the electrical device 400. The second mounting structure 80 includes a third mounting plate 81, a fourth mounting plate 82, and a second mounting sleeve 83. The third mounting plate 81 and the fourth mounting plate 82 are both welded to the second sidewall 12, and the second mounting sleeve 83 is fixedly connected to the third mounting plate 81 and the fourth mounting plate 82.

[0066] According to a second aspect of the embodiments of the present application, the embodiments of the present application further provide an electrical device 400, which includes an electrical load 410. The electrical device 400 includes, but is not limited to, electric toys, power tools, battery-powered vehicles, electric vehicles, ships, spacecraft, and the like. Electric toys may include, but are not limited to, fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys. Spacecraft may include, but are not limited to, airplanes, rockets, space shuttles, and spacecraft. The electrical device 400 also includes the aforementioned battery device 200, i.e., the electrical device 400 utilizes one battery device 200 or multiple battery devices 200 connected in series, parallel, or hybrid, and the electrical load 410 is electrically connected to the battery device 200. The battery device 200 is used to store electrical energy, or the battery device 200 is used to provide electrical energy to the electrical load 410, thereby enabling the electrical load 410 to operate normally.

[0067] The electric device 400 is an electric car, and is assembled with the battery device 200. Figure 10 As shown, the battery device 200 is mounted on the frame 430 of the electric vehicle. The electric vehicle includes the frame 430, a drive motor, and wheels 440. The battery device 200 and the drive motor are both fixedly mounted on the frame 430. The wheels 440 are rotatably connected to the frame 430. The battery device 200 is electrically connected to the drive motor, and the drive motor is drivably connected to the wheels 440. The battery device 200 provided in this application is used to power the drive motor (the drive motor is one of the electrical loads 410 of the electrical equipment 400). The drive motor then drives the wheels 440 to rotate, allowing the electric vehicle to travel normally. The electric vehicle also includes a control device 420, which is mounted on the frame 430 and electrically connected to the battery device 200. The control device 420 is used to control and monitor the charging and discharging operating status of the battery device 200. In some electric vehicles, the battery housing of the battery device 200 can serve as part of the chassis structure of the electric vehicle. For example, part of the battery box may become at least a part of the floor of the electric vehicle, or part of the battery box may become at least a part of the cross beam and the longitudinal beam of the electric vehicle.

[0068] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body having a storage space, wherein the battery cell is stored in the storage space, the box body comprising a bottom wall and two opposite first side walls, the two first side walls being respectively connected to opposite side edges of the bottom wall, and the first side walls extending along a first direction; Two first mounting structures, the two first mounting structures corresponding one-to-one to the two first side walls, the two first mounting structures being fixedly connected to the box body and protruding from the first side walls along the second direction; at least one reinforcement structure fixedly connected to the first side wall, and at least a portion of one of the reinforcement structures fixedly connected to one of the first mounting structures, the reinforcement structure comprising a first bracket and a first reinforcement plate, the first reinforcement plate fixedly connected to a side of the first side wall facing away from the accommodating space, the first bracket fixedly connected to a side of the first reinforcement plate facing away from the first side wall, and the first bracket fixedly connected to the first mounting structure; The first direction is perpendicular to the second direction.

2. The battery device according to claim 1, wherein: The first mounting structure includes a first mounting plate, a second mounting plate, and a plurality of first mounting sleeves. The first mounting plate and the second mounting plate are spaced apart along the third direction. The first mounting plate and the second mounting plate are both fixedly connected to the box body. The first mounting sleeve is fixedly connected to the first mounting plate and the second mounting plate. The plurality of first mounting sleeves are spaced apart along the first direction. The first bracket and the first reinforcing plate are located between the first mounting plate, the second mounting plate, and the first mounting sleeve. The first bracket is fixedly connected to the first mounting plate or the second mounting plate. The first direction, the second direction and the third direction are perpendicular to each other.

3. The battery device according to claim 2, characterized in that The first reinforcing plate includes a first curved portion, a first connecting portion, and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively connected to two ends of the first curved portion along the third direction, the first connecting portion and the second connecting portion are both fixedly connected to the box body, and the first curved portion protrudes in a direction away from the first side wall; The first bracket includes a first connecting section and a second connecting section that are connected by bending. The first connecting section is fixedly connected to the first bent portion, and the second connecting section is fixedly connected to the first mounting plate or the second mounting plate.

4. The battery device according to any one of claims 1 to 3, characterized in that: The first bracket is an integrally formed component, and the first bracket extends along the first direction; And / or, the first reinforcing plate is an integrally formed component.

5. The battery device according to claim 3, wherein: The first reinforcing plate is connected to a plurality of first brackets at intervals along the first direction.

6. The battery device according to claim 5, characterized in that The plurality of first brackets correspond one-to-one to the plurality of first mounting sleeves.

7. The battery device according to claim 5, characterized in that The first mounting plate and the second mounting plate are both provided with a plurality of mounting ears corresponding one-to-one to the plurality of first mounting sleeves, and the second connecting section of the first bracket extends between the mounting ears of the first mounting plate and the mounting ears of the second mounting plate.

8. The battery device according to claim 3, wherein: The first mounting plate is fixedly connected to the bottom wall and / or the first mounting plate is fixedly connected to the first side wall near the bottom wall, the second mounting plate is fixedly connected to the first side wall, and the second connecting section is fixedly connected to the first mounting plate.

9. The battery device according to claim 8, characterized in that The second mounting plate is provided with a collapse guide portion, the collapse guide portion is recessed toward the first mounting plate, and the collapse guide portion extends along the first direction.

10. The battery device according to any one of claims 1 to 3, 8 and 9, characterized in that: The reinforcement structure further includes a second reinforcement plate, which is fixedly connected to a side of the first side wall facing the accommodating space, and the second reinforcement plate is spaced apart from the battery cell.

11. The battery device according to claim 10, characterized in that The battery device further includes a first insulating buffer pad, which is sandwiched and fixed between the second reinforcing plate and the battery cell.

12. The battery device according to claim 10, wherein: The box body further includes two opposite second side walls, both of which are connected to the bottom wall, and the two first side walls and the two second side walls are alternately connected end to end to enclose the accommodation space; The battery device includes two end beams arranged in the accommodating space, the two end beams are arranged at intervals, two ends of the end beams are respectively connected to the two second reinforcing plates, and the end beams are insulated from the battery cells.

13. The battery device according to claim 12, characterized in that The battery device also includes two second brackets, which correspond one-to-one to the two end beams. The second brackets include a second bent portion, a third connecting portion and a fourth connecting portion. The third connecting portion, the second bent portion and the fourth connecting portion are connected in sequence. The third connecting portion and the fourth connecting portion are both fixedly connected to the box body, and the second bent portion is fixedly connected to the end beam.

14. The battery device according to claim 13, wherein: The end cross beam includes a beam body and a reinforcing connection portion connected to the beam body, the reinforcing connection portion protrudes toward the second side wall along the first direction, the fourth connection portion is fixedly connected to the bottom wall, the third connection portion is fixedly connected to the second side wall, the second curved portion is fixedly connected to the reinforcing connection portion, and the two ends of the beam body along the second direction are respectively connected to two second reinforcing plates.

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

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