Battery device and electric appliance

Abstract

This application relates to the field of battery device technology, disclosing a battery device and an electrical device. The battery device includes battery cells, a housing, two first mounting structures, and at least one reinforcing structure. Multiple battery cells are housed within the housing. The housing includes a bottom wall and two opposing first side walls, each connected to one of the opposite edges of the bottom wall. The two first mounting structures correspond one-to-one with the two first side walls and are fixedly connected to the housing. The reinforcing structure includes a first bracket and a first reinforcing plate. The first reinforcing plate is fixedly connected to the first side wall, and the first bracket is fixedly connected to the side of the first reinforcing plate opposite to the first side wall. The first bracket is also fixedly connected to the first mounting structures. Furthermore, the electrical device includes this battery device to provide electrical energy. This technical solution aims to address the problem of short circuits and thermal runaway risks caused by significant deformation of the mounting structure and the side walls of the housing when subjected to lateral impact or lateral external force.

Description

Technical Field

[0001] This application belongs to the field of battery equipment technology, and in particular relates to a battery device and an electrical device. Background Technology

[0002] Currently, battery devices are assembled and fixed to electrical equipment using a mounting structure, which is located on the outer wall of the battery device's casing. This mounting structure is often made of sheet metal, resulting in relatively weak structural strength. Furthermore, because the battery device casing is typically thin-walled, the mounting structure and the casing's sidewalls undergo significant deformation when subjected to impacts or external forces, especially side impacts or lateral pressure. This can cause internal short circuits in the battery cells due to impact or compression, or damage or internal short circuits in the internal electrical components, ultimately leading to the risk of thermal runaway within the battery device. Summary of the Invention

[0003] The purpose of this application is to provide a battery device and electrical equipment that aims to solve the problem of short circuits and thermal runaway risks caused by large deformation of the battery device's mounting structure and the side wall of the housing when subjected to side impact or lateral external force.

[0004] To achieve the above objectives, according to a first aspect of the embodiments of this application, a battery device is provided, including a battery cell, a housing, two first mounting structures, and at least one reinforcing structure. The housing has a receiving space in which multiple battery cells are received. The housing includes a bottom wall and two opposing first side walls, which are respectively connected to opposite sides of the bottom wall and extend along a first direction. The two first mounting structures correspond one-to-one with the two first side walls and are fixedly connected to the housing and protrude from the first side walls along a second direction. The reinforcing structure is fixedly connected to the first side walls, and at least a portion of one reinforcing structure is fixedly connected to one of the first mounting structures. The reinforcing structure includes a first bracket and a first reinforcing plate. The first reinforcing plate is fixedly connected to the side of the first side wall opposite to the receiving space, and the first bracket is fixedly connected to the side of the first reinforcing plate opposite to the first side wall. The first bracket is also 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 this application is mainly mounted to an electrical device via a first mounting structure, thereby providing power to the electrical load of the device. Two first mounting structures are fixedly connected to the housing, each corresponding to a first sidewall and protruding from the first sidewall along a second direction. A reinforcing structure is provided to improve the structural strength of the assembly structure between the first mounting structures and the first sidewalls, thus enhancing their impact resistance. Therefore, when the battery device is subjected to a side impact or lateral external force, the first mounting structures and the first sidewalls are less likely to deform or deform significantly, reducing or even preventing impact or compression on the battery cells. This lowers 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. The first bracket and the first reinforcing plate further strengthen the connection between the first mounting structures and the first sidewalls, contributing to the improved structural strength of the assembly structure.

[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 and second mounting plates are spaced apart along a third direction and are both fixedly connected to the housing. The first mounting sleeves are fixedly connected to both the first and second mounting plates. The plurality of first mounting sleeves are spaced apart along a first direction. A first bracket and a first reinforcing plate are located between the first mounting plate, the second mounting plate, and the first mounting sleeves. The first bracket is fixedly connected to either the first or second mounting plate. The third direction is the height direction of the battery device, and the first, second, and third directions are perpendicular to each other. The reinforcing structure strengthens the assembly structure between the first mounting structure and the first sidewall, improving the structural strength of the assembly structure.

[0007] In some embodiments, the first reinforcing plate includes a first bent portion, a first connecting portion, and a second connecting portion. The first connecting portion and the second connecting portion are respectively connected to the two ends of the first bent portion along a third direction. Both the first connecting portion and the second connecting portion are fixedly connected to the housing, and the first bent portion protrudes in a direction away from the first sidewall. The first bracket includes a first connecting segment and a second connecting segment that are bent and connected together. The first connecting segment is fixedly connected to the first bent portion, and the second connecting segment is fixedly connected to the first mounting plate or the second mounting plate. This design structure is beneficial to improving the structural strength of the first reinforcing plate, thereby improving the structural strength of the assembly structure between the first sidewall and the first mounting structure.

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

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

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

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

[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 segment is fixedly connected to the first mounting plate.

[0013] In some embodiments, the second mounting plate is provided with a collapsible guide portion, which is recessed toward the first mounting plate and extends along a first direction. The collapsible guide portion can reduce the energy that continues to be transferred to the housing and the battery cells, thereby reducing the probability of battery cells being damaged by impact or compression or thermal runaway caused by internal short circuits, and improving the safety of the battery device.

[0014] In some embodiments, the reinforcing structure further includes a second reinforcing plate, which is fixedly connected to the side of the first sidewall facing the receiving space, and is spaced apart from the battery cell. The cooperation between the second reinforcing plate and the first reinforcing plate further enhances the structural strength of the first sidewall.

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

[0016] In some embodiments, the housing further includes two opposing second sidewalls, both of which are connected to the bottom wall, and the two first sidewalls and the two second sidewalls are alternately connected end-to-end to enclose an accommodating space; the battery device includes two end beams disposed within the accommodating space, the two end beams being spaced apart, and the two ends of the end beams being connected to two second reinforcing plates respectively, with the end beams insulated from the battery cells. The two end beams combine the two second reinforcing plates together, i.e., the end beams support the ends of the second reinforcing plates, thereby improving the impact or compression resistance of the second reinforcing plates.

[0017] In some embodiments, the battery device further includes two second supports, each corresponding to one of the two end crossbeams. Each second support includes a second curved portion, a third connecting portion, and a fourth connecting portion, which are sequentially connected. The third and fourth connecting portions are both fixedly connected to the housing, and the second curved portion is fixedly connected to the end crossbeams. This allows the end crossbeams to enhance the structural strength of the second sidewall, improving its resistance to frontal impacts or external force compression.

[0018] In some embodiments, the end beam includes a beam body and a reinforcing connection portion connected to the beam body. The reinforcing connection portion protrudes towards a second sidewall along a first direction. A fourth connection portion is fixedly connected to the bottom wall, a third connection portion is fixedly connected to the second sidewall, a 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. 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 the embodiments of this application, an electrical device is provided. The electrical device includes a battery device as described above. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0022] The figures in the diagram are labeled as follows: 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. Collapsible guide; 23. First mounting sleeve; 24. Mounting lug; 30. Reinforcing structure; 31. First bracket; 311. First connecting section; 312. Second connecting section; 32. First reinforcing plate; 321. First bending portion; 322. First connecting portion; 323. Second connecting portion; 33. Second reinforcing plate; 41. First insulating buffer pad; 42. Second insulating buffer pad; 50. End beam; 51. Beam body; 52. Reinforcing connection; 53. Electrical compartment space; 54. Electrical components; 60. Second bracket; 61. Second bending portion; 62. Third connecting portion; 63. Fourth connecting portion; 70. Bolted connection pairs; 80. Second mounting structure; 81. Third mounting plate; 82. Fourth mounting plate; 83. Second mounting sleeve; 91. Bottom reinforcing plate; 92. Liquid cooling plate; 93. Box cover; 94. Middle crossbeam; 200. Battery device; 400. Electrical equipment; 410. Electrical load; 420. Control device; 430. Chassis; 440. Wheel; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0024] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of 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 technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants (battery devices used in these applications are generally referred to as energy storage batteries), but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields (battery devices used in these applications are generally referred to as power batteries). With the continuous expansion of the application fields of battery devices, users are paying increasing attention to the safety performance of battery devices.

[0028] In related technologies, battery devices are assembled and fixed to electrical equipment using a mounting structure, which is located on the outer wall of the battery device's casing. This mounting structure is often made of sheet metal, resulting in relatively weak structural strength. Furthermore, because the battery device casing is typically thin-walled, the mounting structure and the casing's sidewalls undergo significant deformation when subjected to side impacts or lateral external forces. This can cause the individual battery cells inside the device to deform under impact or pressure, leading to internal short circuits and ultimately posing a risk of thermal runaway within the battery device.

[0029] Based on the above considerations, embodiments of this application provide a battery device, which is mainly mounted to an electrical device via a first mounting structure to provide power to the electrical load of the device. The first mounting structure is fixedly connected to the outer wall of the first sidewall of the housing, and a reinforcing structure is provided to improve the structural strength of the assembly structure between the first mounting structure and the first sidewall, thereby improving the impact resistance of the first mounting structure and the first sidewall. Thus, when the battery device is subjected to a side impact or lateral external force, the first mounting structure and the first sidewall are less likely to deform or deform only slightly, reducing or even avoiding impact or compression on the battery cells. This reduces 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.

[0030] To illustrate the technical solutions provided by the embodiments of this application, the following detailed description is provided in conjunction with 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 form the directions of the three axes of the spatial rectangular coordinate system.

[0032] According to a first aspect of the embodiments of this application, embodiments of this application provide a battery device 200. For example... Figure 1 , Figure 3 and Figure 4 As shown, the battery device 200 includes a battery cell 100, a housing 10, two first mounting structures 20, and at least one reinforcing structure 30. The housing 10 has a receiving space 14 in which multiple battery cells 100 are housed. The housing 10 includes two opposing first sidewalls 11 extending along a first direction X, and the first sidewalls 11 are spaced apart from the battery cells 100 (i.e., an air gap can form an insulating connection between the first sidewalls 11 and the battery cells 100). The two first mounting structures 20 correspond one-to-one with the two first sidewalls 11, and are fixedly connected to the housing 10 and protrude from the first sidewalls 11 along a second direction Y. The reinforcing structures 30 are fixedly connected to the first sidewalls 11, and at least a portion of one reinforcing structure 30 is fixedly connected to one of the first mounting structures 20. In this embodiment, the battery device 200 has two reinforcing structures 30, each corresponding one-to-one with one of the first mounting structures 20.

[0033] The battery device 200 provided in the embodiments of this application is mainly mounted on the electrical equipment 400 via a first mounting structure 20, thereby providing power to the electrical load 410 of the electrical equipment 400. Two first mounting structures 20 are fixedly connected to the housing 10. The first mounting structures 20 protrude from the first sidewall 11 along the second direction Y, and a reinforcing structure 30 is provided to improve the structural strength of the assembly structure between the first mounting structures 20 and the first sidewall 11, i.e., to improve the impact resistance of the first mounting structures 20 and the first sidewall 11. Thus, when the battery device 200 is subjected to a side collision or lateral external force compression, the first mounting structures 20 and the first sidewall 11 are less likely to deform or deform only slightly, reducing or even avoiding impact or compression on the battery cells 100. This reduces 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 device 200.

[0034] "Battery device 200 being subjected to a side impact" refers to a collision that occurs when the battery device 200 is being moved or transported. The direction of movement / transport is considered forward, while the direction perpendicular to the direction of movement / transport is considered lateral. Conversely, a collision that occurs forward is called a frontal collision. "Battery device 200 being subjected to lateral external force compression" refers to an external force compressing the battery device 200 from the side. In comparison, a collision is an instantaneous and violent impact, while compression is a relatively gradual and prolonged pushing or pressing action compared to a collision. Therefore, this embodiment uses the first mounting structure 20 being subjected to a side impact or lateral external force compression as an example for illustration.

[0035] The battery cell 100 can be a rechargeable battery, meaning it can be recharged after discharge to reactivate the active materials and continue to be used. The battery cell 100 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc. Therefore, when subjected to impact or compression, the battery cell 100 may be at risk of internal short circuits caused by electrode punctures in the insulating membrane, or electrolyte leakage causing internal short circuits. Furthermore, the battery cell 100 is a square battery cell, also known as a square cell. Of course, the battery cell 100 can also be a cylindrical battery cell, also known as a cylindrical cell. The following description uses a battery assembly 200 (i.e., a square battery) using square cells as an example. The implementation scheme for assembling a battery assembly 200 using cylindrical cells can be referred to in detail in the implementation scheme for assembling a battery assembly 200 using square cells, and will not be repeated here.

[0036] In some embodiments, such as Figure 1 , Figure 3 , Figure 5 and Figure 8 As shown, the reinforcing structure 30 includes a first bracket 31 and a first reinforcing plate 32. The first reinforcing plate 32 is fixedly connected to the side of the first sidewall 11 opposite to the receiving space 14. The first bracket 31 is fixedly connected to the side of the first reinforcing plate 32 opposite to the first sidewall 11, and the first bracket 31 is fixedly connected to the first mounting structure 20. The first mounting structure 20 and the first sidewall 11 are reinforced by the first bracket 31 and the first reinforcing plate 32, which helps to improve the structural strength of the assembly structure between the first mounting structure 20 and the first sidewall 11. The reinforcing structure 30 is assembled using a split-type modular structure. The first reinforcing plate 32 and the first bracket 31 are assembled by first fixing the first reinforcing plate 32 to the first sidewall 11, then fixing the first bracket 31 to the first reinforcing plate 32, and finally fixing the first bracket 31 to the first mounting structure 20. This allows for rapid assembly and improves assembly efficiency. In this embodiment, the split structure formed by the first bracket 31 and the first reinforcing plate 32 is different from the integral structure 30 with the first bracket 31 and the first reinforcing plate 32 being formed as a whole. The first bracket 31 and the first reinforcing plate 32 can be separated and moved and transported separately, which is more lightweight and convenient, reduces the difficulty and intensity of moving and transporting, and improves the efficiency of moving and transporting.

[0037] In some embodiments, the first bracket 31 and the first reinforcing plate 32 can be integrally formed components, 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, that is, the first reinforcing plate 32 and the first side wall 11 are fixedly connected, reducing the number of connection and assembly operation steps.

[0038] In some embodiments, such 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 arranged at intervals along a third direction Z, and both the first mounting plate 21 and the second mounting plate 22 are fixedly connected to the housing 10. The first mounting sleeves 23 are fixedly connected to both the first mounting plate 21 and the second mounting plate 22, and the plurality of first mounting sleeves 23 are arranged at intervals along a 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 sleeves 23, that is, the first bracket 31 and the first reinforcing plate 32 are housed within the receiving space formed by the first mounting plate 21, the second mounting plate 22, the first mounting sleeves 23, and the first side wall 11, and the first bracket 31 can be fixedly connected to the first mounting plate 21. Thus, by strengthening the assembly structure of the first mounting structure 20 and the first side wall 11 through the reinforcing structure 30, the structural strength of the assembly structure of the first mounting structure 20 and the first side wall 11 is improved. Specifically, after the first reinforcing 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 housing 10, then the first bracket 31 is fixedly connected to the first mounting plate 21, then the second mounting plate 22 is fixedly connected to the housing 10, and 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 multiple first mounting sleeves 23, compared to the one-piece molded first mounting structure 20, allows the first mounting plate 21, the second mounting plate 22 and the multiple first mounting sleeves 23 to be disassembled and moved and transported separately, making it lighter and more convenient, reducing the difficulty and intensity of movement and transportation, and improving the efficiency of movement and transportation. Furthermore, since the first bracket 31 and the first reinforcing plate 32 are housed within the receiving 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 within the receiving space, the split first mounting structure 20 is assembled in the above order, thereby making it easy to contact the connection position between the first bracket 31 and the first mounting plate 21, reducing the assembly difficulty of fixing the connection between the first bracket 31 and the first mounting plate 21. Then, the second mounting plate 22 is assembled with multiple first mounting sleeves 23 to form the receiving space, so that the first bracket 31 and the first reinforcing plate 32 are housed within the receiving space, which helps to improve 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 housing 10, the first bracket 31 and the second mounting plate 22 are then fixedly connected, the first mounting plate 21 is fixedly connected to the housing 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 reinforcing plate 32 are all made of the same metal material, such as steel. Thus, the first reinforcing plate 32 can be welded to the first side wall 11, the first bracket 31 to the first reinforcing 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, resulting in stable and efficient connections. Alternatively, the first reinforcing plate 32 can also be fixedly connected to the first side wall 11, the first bracket 31 to the first reinforcing 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 using bolt connections.

[0041] In some embodiments, such as Figure 5 As shown, the first reinforcing plate 32 includes a first bent 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 two ends of the first bent portion 321. This design structure is beneficial to improving the structural strength of the first reinforcing plate 32, thereby improving the structural strength of the assembly structure between the first sidewall 11 and the first mounting structure 20. Both the first connecting portion 322 and the second connecting portion 323 are fixedly connected to the housing 10, and the first bent portion 321 protrudes in a direction away from the first sidewall 11. The first bracket 31 includes a first connecting section 311 and a second connecting section 312 that are bent and connected. The first connecting section 311 is fixedly connected to the first bent portion 321, and the second connecting section 312 is fixedly connected to the first mounting plate 21 or the second mounting plate 22. Furthermore, under the premise of the same structural strength, the first reinforcing plate 32 with this design structure is lighter than the solid first reinforcing plate 32, which is beneficial to reducing the overall weight of the battery device 200 and helps to achieve the goal of lightweighting the battery device 200.

[0042] In some embodiments, the first bracket 31 and the first reinforcing plate 32 are two independent components. The first bracket 31 is an integrally formed component that extends along a first direction X, and the first reinforcing plate 32 is also an integrally formed component. The first bracket 31 and the first reinforcing plate 32 are both manufactured from steel materials using a stamping process, resulting in a structurally stable and reliable structure with high production efficiency.

[0043] In some embodiments, such as Figure 1 , Figure 3 and Figure 8 As shown, a plurality of first brackets 31 are connected at intervals along the first direction X of the first reinforcing plate 32, and the plurality of first brackets 31 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 brackets 31 are 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 connection structure between the first reinforcing plate 32 and the first mounting structure 20. Under the premise of ensuring connection strength, the connection method of using a plurality of first brackets 31 can reduce the overall weight of the first brackets 31 compared with the use of integrally formed first brackets 31, which is beneficial to reducing the overall weight of the battery device 200 and helps to achieve the goal of lightweight battery device 200.

[0044] In some embodiments, the plurality of first brackets 31 and the plurality of first mounting sleeves 23 may not be in a one-to-one correspondence. The number of first mounting sleeves 23 may be greater than the number of first brackets 31, 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. In these embodiments, 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 configured in a one-to-one correspondence with at least a portion of the first mounting sleeves 23, while the remaining portion of the first brackets 31 are staggered from any one of the first mounting sleeves 23.

[0045] In some embodiments, such as Figure 1 , Figure 3 and Figure 8As shown, both the first mounting plate 21 and the second mounting plate 22 are provided with multiple mounting ears 24 corresponding to multiple first mounting sleeves 23. When both the first mounting plate 21 and the second mounting plate 22 are fixedly connected to the housing 10, the multiple mounting ears 24 of the first mounting plate 21 and the multiple mounting ears 24 of the second mounting plate 22 are stacked one-to-one. In this embodiment, the first reinforcing plate 32 is connected with multiple first brackets 31 at intervals along the first direction X, and the second connecting section 312 of the first bracket 31 extends between the mounting ears 24 of the stacked first mounting plate 21 and the mounting ears 24 of the second mounting plate 22. Compared to continuous plate-shaped mounting ears, the first mounting plate 21 and the second mounting plate 22 in this embodiment have their material between two adjacent mounting ears 24 cut off while ensuring that the structural strength meets the requirements. This reduces the amount of material used in the first mounting plate 21 and the second mounting plate 22, which helps to reduce the overall weight of the battery device 200 and helps to achieve the goal of lightweighting the battery device 200.

[0046] In some embodiments, such as Figure 1 , Figure 3 and Figure 5 As shown, the housing 10 also includes a bottom wall 13, and two first side walls 11 are respectively connected to the opposite side edges of the bottom wall 13. Furthermore, as... Figure 5 As shown, the first mounting plate 21 can be fixedly connected only to the bottom wall 13. For example... Figure 5 As shown, the battery device 200 also includes a bottom reinforcing plate 91, which is abutted against the side of the bottom wall 13 opposite to the receiving space 14. The bottom reinforcing plate 91 enhances the structural strength of the bottom wall 13, thereby strengthening the connection between the structure 30 and the bottom reinforcing plate 91 to improve the overall structural strength of the housing 10. To further improve the connection strength between the first mounting plate 21 and the housing 10, such as... Figure 5 As shown, the first mounting plate 21 is fixedly connected to the edge area between the bottom reinforcing plate 91 and the bottom wall 13, that is, the first mounting plate 21 is sandwiched between the bottom wall 13 and the bottom reinforcing 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 only to the first sidewall 11 near the bottom wall 13.

[0048] In some 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 simultaneously to improve the connection strength between the first mounting plate 21 and the housing 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 (i.e., this 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 housing 10.

[0049] In some embodiments, such as Figures 3 to 5 , Figure 8 and Figure 9 As shown, the second mounting plate 22 is provided with a collapsible guide portion 221, and the first bracket 31 is fixedly connected to the first mounting plate 21. The collapsible guide portion 221 is recessed towards the first mounting plate 21 and extends along the first direction X. Thus, when the battery device 200 is subjected to a side impact or lateral external force compression exceeding a certain level, because the second mounting plate 22 is provided with a collapsible guide portion 221, the structural strength of the collapsible guide portion 221 is relatively weaker than the rest of the first mounting structure 20. Therefore, the force of the side impact or lateral external force compression will first destroy the collapsible guide portion 221, and then guide the second mounting plate 22 to bend and deform in a direction away from the first mounting plate 21. Furthermore, since the second mounting plate 22 and the first mounting plate 21 are fixedly connected together by the first mounting sleeve 23, the first mounting plate 21 will bend and deform together with the second mounting plate 22. This bending and deformation of the first mounting plate 21 and the second mounting plate 22 together absorbs most of the energy from the side impact or lateral external force compression. In other words, the collapse guide 221 can reduce the energy further transmitted to the housing 10 and the battery cell 100, thereby reducing the probability of the battery cell 100 being damaged by impact or compression, or the risk of thermal runaway due to internal short circuit, and improving the safety of the battery device 200.

[0050] To further enhance the structural strength of the first sidewall 11, in some embodiments, such as Figures 1 to 3 , Figure 5As shown, the reinforcing structure 30 also includes a second reinforcing plate 33, which is fixedly connected to the side of the first sidewall 11 facing the receiving space 14. The second reinforcing plate 33 is a component integrally manufactured from steel using a stamping process, and is fixed to the first sidewall 11 by spot welding. Thus, the cooperation of the second reinforcing plate 33 and the first reinforcing plate 32 further improves the structural strength of the first sidewall 11. Furthermore, the cooperation of the first bracket 31, the first reinforcing plate 32, the second reinforcing plate 33, the first mounting plate 21, the second mounting plate 22, and the first mounting sleeve 23 together enhances the structural strength of the assembly structure between the first mounting structure 20 and the housing 10. In this embodiment, the second reinforcing plate 33 is spaced apart from the battery cell 100 (i.e., an air gap can form an insulating structure between the second reinforcing plate 33 and the battery cell 100).

[0051] In some embodiments, such as Figure 1 , Figure 3 , Figure 5 As shown, the battery device 200 also includes a first insulating buffer pad 41, which is clamped and fixed between the second reinforcing plate 33 and the battery cell 100, thus insulating the second reinforcing plate 33 from the battery cell 100. Furthermore, when the battery device 200 is subjected to a side impact or lateral external force compression, after the impact or compression energy is absorbed and weakened by the first mounting structure 20, the reinforcing structure 30, and the first sidewall 11, the remaining energy continues to be transferred to the first insulating buffer pad 41, where it absorbs and buffers most of the remaining energy. In other words, the first insulating buffer pad 41 can further reduce the energy transferred to the battery cell 100, thereby further reducing the probability of the battery cell 100 being damaged by impact or compression, or the risk of thermal runaway due to internal short circuit.

[0052] The first insulating buffer pad 41 can be a component made of polyurethane material.

[0053] Alternatively, in some 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 from each other. Furthermore, the insulating adhesive absorbs and buffers the energy transmitted to the battery cell 100, thereby reducing the impact or compression experienced by the battery cell 100.

[0054] In some embodiments, such as Figure 1As shown, multiple battery cells 100 are configured as multiple battery cell assemblies 101, which are arranged along a first direction X. Each battery cell assembly 101 may include multiple battery cells 100 arranged along a second direction; alternatively, each battery cell assembly 101 may include only one battery cell 100. The battery device 200 also includes multiple second insulating buffer pads 42, with a second insulating buffer pad 42 sandwiched and fixed between adjacent battery cell assemblies 101. The second insulating buffer pads 42 provide insulation separation between adjacent battery cell assemblies 101. Furthermore, the second insulating buffer pads 42 are compressed and deformed when the battery cells 100 expand, thereby absorbing the expansion force of the battery cells 100 to a certain extent, mitigating the mutual expansion and compression between adjacent battery cell assemblies 101, and thus extending the service life of the battery device 200. The second insulating buffer pads 42 can also insulate the adjacent battery cell assemblies 101 from heat, reducing heat transfer efficiency. Figure 1 , Figures 3 to 7 As shown, the battery device 200 also includes a liquid cooling plate 92, which is abutted against the side of the bottom wall 13 facing the receiving space 14. The battery cell 100 is fixed to the liquid cooling plate 92 with structural adhesive. The coolant flows in the flow channel of the liquid cooling plate 92, thereby absorbing and carrying away the heat generated by the battery cell 100, achieving cooling and heat dissipation of the battery cell 100, and ensuring the stable thermal performance of the battery device 200.

[0055] In some embodiments, such as Figures 1 to 3 , Figure 6 and Figure 7 As shown, the housing 10 also includes two opposing second sidewalls 12, with the two first sidewalls 11 and the two second sidewalls 12 alternately connected end-to-end to enclose the accommodating space 14. Figure 3 , Figures 5 to 7 As shown, the box 10 also includes a bottom wall 13, and the two first side walls 11 and the two second side walls 12 are all connected to the bottom wall 13, that is, the box 10 is a square box. Figures 1 to 4 , Figure 6 and Figure 7 As shown, the battery device 200 includes two end beams 50 disposed within the receiving space 14. The two end beams 50 are correspondingly disposed within the receiving space 14 to the two second sidewalls 12. The end beams 50 extend along the second direction Y, and their two ends are respectively connected to two second reinforcing plates 33. Thus, the two end beams 50 combine the two second reinforcing plates 33 together, supporting the ends of the second reinforcing plates 33, thereby improving the impact or compression resistance of the second reinforcing plates 33, which in turn improves the impact or compression resistance of the first sidewall 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 also includes a central crossbeam 94 disposed within the receiving space 14. The central crossbeam 94 is located between the two end crossbeams 50, and both ends of the central crossbeam 94 are fixedly connected to two second reinforcing plates 33 along the second direction Y. The central crossbeam 94 supports the central positions of the second reinforcing plates 33, the first sidewall 11, the first reinforcing plate 32, and the first mounting structure 20, further improving the overall impact or compression resistance of the battery device 200.

[0057] In some embodiments, the end beam 50 is a component made of metal, and the end beam 50 is insulated from the battery cell 100. A second insulating buffer pad 42 is sandwiched between the end beam 50 and its opposite battery cell assembly 101, thus insulating the end beam 50 and the battery cell 100. When the battery device 200 is subjected to a head-on collision or a forward external force, the second sidewall 12 and the end beam 50 first resist and absorb most of the impact or compression energy. The remaining energy is then transferred to the second insulating buffer pad 42, where it absorbs and buffers most of the remaining energy, thereby reducing the probability of damage to the battery cell 100 due to a head-on collision or a forward external force, or the risk of thermal runaway caused by an internal short circuit.

[0058] Alternatively, in some 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 from each other. Furthermore, the insulating adhesive absorbs and buffers the impact energy from a direct collision or the compressive energy from a direct external force transmitted to the battery cell 100, thereby reducing the impact or compression experienced by the battery cell 100.

[0059] The thickness of the first side wall 11, the second side wall 12, and the bottom wall 13 is 0.5mm-2.0mm, all of which are thin-walled sheet metal. That is, the box body 10 is a sheet metal part, which is lightweight and has 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 sidewall 12. The electrical compartment space 53 is used to install electrical components 54, including a battery management system, a high-voltage box, etc., and the electrical components 54 are electrically connected to the battery cell assembly 101. Figure 1As shown, the battery device 200 also includes a cover 93, which closes onto the housing 10. A sealing gasket can be used to seal the cover 93 and the housing 10, reducing the probability of moisture seeping into the containment space 14 through the gap between the cover 93 and the housing 10, causing a short circuit in the battery cell 100 or electrical component 54. Furthermore, by providing a reinforcing structure 30 and an end crossbeam 50, the structural strength of the housing 10 and the first mounting structure 20 is enhanced, reducing the probability of damage or internal short circuit of the electrical component 54 due to impact or external pressure when the battery device 200 is subjected to collision or external force.

[0061] In some embodiments, such as Figure 6 and Figure 7 As shown, the battery device 200 also includes two second supports 60, each corresponding to one of the two end crossbeams 50. Each second support 60 includes 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. Both the third connecting portion 62 and the fourth connecting portion 63 are fixedly connected to the housing 10, and the second curved portion 61 is fixedly connected to the end crossbeams 50. This allows the end crossbeams 50 to enhance the structural strength of the second sidewall 12, improving its resistance to frontal impacts or external force compression.

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

[0063] In some embodiments, the beam body 51 of the end 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 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; or, the beam body 51 may only press the fourth connecting portion 63 but the two are not connected).

[0064] The end beam 50 is a one-piece component made of aluminum alloy, i.e., extruded. The end beam 50 has a multi-cavity anti-extrusion structure, improving its impact energy absorption performance and resistance to deformation under pressure. The second support 60 is a one-piece component made of steel using a stamping process. Since the end beam 50 and the second support 60 are made of different metal materials, welding them together is difficult. Therefore, if... Figure 7 As shown, the second curved portion 61 and the reinforcing connection portion 52 are locked together by a bolt connection pair 70. It can be understood that the end of the beam body 51 is also locked together with the second reinforcing plate 33 by a bolt connection pair 70.

[0065] In some embodiments, such as Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the battery device 200 also includes a second mounting structure 80, and each of the two second sidewalls 12 is provided with at least one second mounting structure 80, such as... 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 opposite to the receiving space 14, and the second mounting structures 80 protrude from the second sidewall 12 along a first direction X. The battery device 200 is mounted and fixed to the electrical equipment 400 together with the first mounting structure 20 and the second mounting structure 80, further improving the structural strength of the connection structure between the battery device 200 and the electrical equipment 400, and helping to improve the stability and reliability of the battery device 200 on the electrical equipment 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 this application, embodiments of this application also 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, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys may include, but are not limited to, stationary or mobile electric toys, such as game consoles, electric car 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 a battery device 200 as described above; that is, the electrical device 400 uses one battery device 200 or multiple battery devices 200 connected in series, parallel, or mixed connections, 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] Among them, the electrical equipment 400 is an electric vehicle, and it is assembled using a battery device 200, such as 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, and 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 driven by the wheels 440. When the battery device 200 provided in this application supplies power to the drive motor (the drive motor is one of the electrical loads 410 of the electrical equipment 400), the drive motor drives the wheels 440 to rotate, enabling the electric vehicle to drive normally. Furthermore, the electric vehicle 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 status of the battery device 200. In some electric vehicles, the battery housing of the battery device 200 can be part of the chassis structure of the electric vehicle. For example, a portion of the battery box can be at least part of the floor of the electric vehicle, or a portion of the battery box can be at least part of the crossbeams and longitudinal beams of the electric vehicle.

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

Claims

1. A battery device, characterized in that, include: Battery cell; The housing has a receiving space, in which the battery cell is housed. The housing includes a bottom wall, two opposing first side walls, and two opposing second side walls. The two first side walls are respectively connected to opposite two sides of the bottom wall. The first side walls extend along a first direction. The two second side walls are both 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 receiving space. Two first mounting structures, each corresponding to one of the two first side walls, are fixedly connected to the box and protrude from the first side walls along the second direction; At least one reinforcing structure is fixedly connected to the first sidewall, and at least a portion of the reinforcing structure is fixedly connected to the first mounting structure. The reinforcing structure includes a first bracket, a first reinforcing plate, and a second reinforcing plate. The first reinforcing plate is fixedly connected to the side of the first sidewall opposite to the receiving space. The first bracket is fixedly connected to the side of the first reinforcing plate opposite to the first sidewall. The first bracket is fixedly connected to the first mounting structure. The second reinforcing plate is fixedly connected to the side of the first sidewall facing the receiving space. The second reinforcing plate is spaced apart from the battery cell. 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 arranged at intervals along a third direction. The first mounting plate and the second mounting plate are both fixedly connected to the box body. The first mounting sleeves are fixedly connected to both the first mounting plate and the second mounting plate. The plurality of first mounting sleeves are arranged at intervals 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 sleeves. The first bracket is fixedly connected to either the first mounting plate or the second mounting plate. The second mounting plate is provided with a collapsible guide portion, which is recessed toward the first mounting plate and extends along the first direction; Two end beams are disposed within the accommodating space, the two end beams are spaced apart, the end beams are insulated from the battery cell, each end beam includes a beam body and a reinforcing connection portion connected to the beam body, the reinforcing connection portion protrudes toward the second sidewall along the first direction, and the two ends of the beam body along the second direction are respectively connected to two second reinforcing plates; Two second supports, each corresponding to one of the two end crossbeams. Each second support includes a third connecting part, a second bending part, and a fourth connecting part connected in sequence. The fourth connecting part is fixedly connected to the bottom wall, the third connecting part is fixedly connected to the second side wall, and the second bending part is fixedly connected to the reinforcing connecting part. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that, The first reinforcing plate includes a first bent portion, a first connecting portion, and a second connecting portion. The first connecting portion and the second connecting portion are respectively connected to the two ends of the first bent portion along the third direction. The first connecting portion and the second connecting portion are both fixedly connected to the housing, and the first bent portion protrudes in a direction away from the first side wall. The first bracket includes a first connecting segment and a second connecting segment that are bent and connected together. The first connecting segment is fixedly connected to the first bent portion, and the second connecting segment is fixedly connected to the first mounting plate or the second mounting plate.

3. The battery device according to any one of claims 1-2, 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 a one-piece molded component.

4. The battery device according to claim 2, characterized in that, The first reinforcing plate is connected with a plurality of the first brackets at intervals along the first direction.

5. The battery device according to claim 4, characterized in that, Each of the first brackets corresponds to one of the first mounting sleeves.

6. The battery device according to claim 4, characterized in that, Both the first mounting plate and the second mounting plate are provided with a plurality of mounting ears that correspond one-to-one with 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.

7. The battery device according to claim 2, characterized in that, 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 segment is fixedly connected to the first mounting plate.

8. The battery device according to claim 1, characterized in that, The battery device further includes a first insulating buffer pad, which is clamped and fixed between the second reinforcing plate and the battery cell.

9. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1-8.

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