Battery device and electric device

Abstract

The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. The battery device comprises a battery monomer, a box body and a sleeve assembly. The box body comprises a beam body and oppositely arranged first and second walls. The beam body and the battery monomer are located in the box body. The first wall comprises first and second sub-walls arranged in layers. The first and second sub-walls and the beam body are respectively provided with first, second and third through holes. The sleeve assembly comprises a first sleeve and a second sleeve connected with the first sleeve and the second wall. The first sleeve is arranged in the first, second and third through holes. The first sleeve is provided with a first protruding part. The first protruding part is in abutment with the second sub-wall, so that the first sleeve can directly pass through the first and second through holes. The first and second sub-walls originally connected together do not need to be disassembled, and the assembly process of the battery device is simplified. The second sleeve is provided with a clamping structure for clamping with an external tool, which is also convenient for the connection of the first and second sleeves.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In some battery devices, bolts, screws, and other connecting components are used to connect the battery device housing to the electrical device via sleeve assemblies. However, some sleeve assemblies have unreasonable structural designs, which leads to complex battery device assembly. This is not conducive to simplifying the battery device assembly process, nor is it conducive to the processing efficiency of the battery device housing. Therefore, how to optimize the structure of the sleeve assembly is an important research topic in battery technology.

[0004] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of this application is to provide a battery device and an electrical device, including but not limited to those that can simplify the assembly process of the battery device.

[0006] The technical solution adopted in the embodiments of this application is:

[0007] In a first aspect, a battery device is provided, comprising a battery cell, a housing, and a sleeve assembly. The housing includes a main body and a beam connected together. The main body has an installation space and a first wall and a second wall disposed opposite to each other along a first direction. The battery cell is located in the installation space, and the beam is located in the installation space and between the first wall and the second wall. The first wall includes a first sub-wall and a second sub-wall stacked together. The first sub-wall is located on the side of the beam facing the second sub-wall. The first sub-wall has a first through hole, the second wall has a second through hole, and the beam has a third through hole. The first through hole, the second through hole, and the third through hole are connected along the first direction. The sleeve assembly includes a first sleeve and a second sleeve. The first sleeve has a portion passing through the first through hole, the second through hole, and the third through hole. One end of the first sleeve is connected to the second wall, and the other end of the first sleeve has a first protrusion located on the side of the second sub-wall facing away from the installation space and abutting against the second sub-wall. One end of the second sleeve is connected to the first sleeve, and the other end of the second sleeve is connected to the second wall. At least a portion of the second sleeve is located between the second wall and the beam. The outer peripheral surface of the portion of the second sleeve located between the beam and the second wall has a locking structure for engaging with an external tool.

[0008] By adopting the technical solution of this embodiment, when assembling the housing and the sleeve assembly, one end of the first sleeve of the sleeve assembly passes through the first through hole of the first sub-wall and the second through hole of the second sub-wall, and then connects to the second wall through the third through hole of the beam and the second sleeve. The other end of the first sleeve is provided with a first protrusion, which is located on the side of the second sub-wall facing away from the installation space and abuts against the second sub-wall, thereby realizing the connection between the first sleeve and the housing. The battery device of this application embodiment utilizes a first sleeve to connect the first wall and the sleeve assembly. The first protrusion of the first sleeve is located on the side of the second sub-wall facing away from the installation space, i.e., the outer side of the housing. During assembly, the first sleeve can directly pass through the first and second through holes and abut against the outer surface of the first wall through the first protrusion, thus achieving fixation without disassembling the originally connected first and second sub-walls. This simplifies the battery device assembly process and improves assembly efficiency. Furthermore, the first and second sub-walls can be processed as a single unit (e.g., electrophoresis or other high-temperature treatment processes), which also simplifies the housing manufacturing process, improves manufacturing efficiency, saves housing processing costs, and enhances the feasibility of housing manufacturing. Additionally, the outer circumferential surface of the portion of the second sleeve located between the second wall and the beam is provided with a locking structure. This locking structure can engage with an external tool, allowing the external tool to be fixed to the second sleeve. This enables the external tool to move or rotate the second sleeve to connect with the first sleeve, facilitating the assembly of the first and second sleeves.

[0009] In some embodiments, the second sub-wall has a receiving groove located on the side of the second sub-wall facing away from the mounting space, and at least a portion of the first protrusion is received within the receiving groove.

[0010] By adopting the technical solution of this embodiment, at least part of the first protrusion is located in the receiving groove, which can reduce the protrusion distance of the first protrusion from the outer surface of the second sub-wall, thus protecting the first sleeve and improving the reliability of the battery device.

[0011] In some embodiments, a first seal is held between the first protrusion and the second sub-wall, and the first seal is disposed around the first sleeve.

[0012] By adopting the technical solution of this embodiment, the first sealing element is used for sealing, resulting in fewer sealing components and fewer sealing interfaces, which helps to improve the reliability of the battery device sealing.

[0013] In some embodiments, the first sleeve includes a first sleeve section and a second sleeve section connected to each other. The first sleeve section has a first protrusion. A portion of the first sleeve section passes through a first through hole, a second through hole, and a third through hole. At least a portion of the second sleeve section passes through a third through hole and is connected to a second wall. The diameter of the first sleeve section is larger than the diameter of the second sleeve section.

[0014] By adopting the technical solution of this embodiment, the first sleeve has a large outer diameter at the interface between the first wall and the beam, which is beneficial to improving the shear resistance of the first sleeve and reducing the possibility of the first sleeve being sheared.

[0015] In some embodiments, the second sleeve abuts against the end face of the beam facing the second wall.

[0016] By adopting the technical solution of this embodiment, during the assembly process of the battery device, the first sleeve can be fixed to the first wall and beam by the second sleeve before the battery cell is installed. The first sleeve can be installed by lifting the first wall and beam, which reduces the assembly difficulty of the battery device and helps to improve the efficiency of the battery device.

[0017] In some embodiments, the first sleeve is inserted into the second sleeve, and the second sleeve is inserted into the third through hole.

[0018] By adopting the technical solution of this embodiment, the outer diameter of the sleeve assembly at the end face of the beam facing the second wall can be increased, the sleeve assembly has a larger outer diameter at the surface of the beam facing the second wall, the sleeve assembly has better shear resistance, which is beneficial to improving the structural strength of the sleeve assembly and improving the shear resistance and lateral deformation resistance of the beam and the whole vehicle.

[0019] In some embodiments, the beam has a hollow cavity, and a partition is provided inside the hollow cavity. The partition divides the hollow cavity into a first sub-cavity and a second sub-cavity distributed along a first direction, and a third through hole penetrates the partition.

[0020] By adopting the technical solution of this embodiment, a partition is provided in the beam body. The partition can enhance the structural rigidity of the beam and reduce the deformation of the beam during the stress process.

[0021] In some embodiments, the third through hole penetrates the partition portion to form the first sub-hole, and the second sleeve is inserted into the first sub-hole.

[0022] By adopting the technical solution of this embodiment, the fourth sleeve section is inserted into the first sub-hole, the fourth sleeve section passes through the partition section, the second sleeve is inserted into the beam body to a greater depth, and the fourth sleeve section can also support the partition section, which is beneficial to improving the beam's support capacity and deformation resistance.

[0023] In some embodiments, the first sleeve and the second sleeve are threaded together.

[0024] By adopting the technical solution of this embodiment, the first sleeve and the second sleeve are connected by a threaded connection, which is simple and facilitates the assembly of the first sleeve and the second sleeve. In addition, part of the second sleeve abuts against the end face of the beam facing the second wall, and the beam can provide pre-tightening force to the second sleeve, which helps to reduce the possibility of the second sleeve twisting and improves the connection reliability of the sleeve assembly.

[0025] In some embodiments, at least a portion of the threaded connection area between the first sleeve and the second sleeve is located within the third through hole.

[0026] By adopting the technical solution of this embodiment, the threaded connection area of ​​the first sleeve and the second sleeve is located in the third through hole. The threaded connection area of ​​the first sleeve and the second sleeve has good structural strength and can play a good supporting role for the beam, which is conducive to improving the deformation resistance of the beam and the deformation resistance of the battery device.

[0027] In some embodiments, the first sleeve is provided with a limiting structure for restricting the rotation of the first sleeve within the first through hole and / or the second through hole.

[0028] By adopting the technical solution of this embodiment, the outer peripheral surface of the first sleeve is provided with a limiting structure, which cooperates with the inner wall of the first through hole and / or the second through hole to restrict the rotation of the first sleeve in the first through hole and / or the second through hole, so as to realize the rotational tightening of the first sleeve and the second sleeve.

[0029] In some embodiments, the second wall is provided with a fourth through hole, and the sleeve assembly further includes a third sleeve connected to the second sleeve. At least a portion of the third sleeve is located on the side of the second wall facing away from the mounting space. The second sleeve and / or the third sleeve passes through the fourth through hole. At least a portion of the third sleeve, a portion of the second wall, and at least a portion of the second sleeve are stacked along a first direction, such that the third sleeve and the second sleeve together clamp the second wall.

[0030] By adopting the technical solution of this embodiment, the second sleeve abuts against the beam and the second wall is clamped between the third sleeve and the second sleeve. In this way, the beam can provide support force to the second sleeve, and the second wall can provide support force to the third sleeve, thereby providing pre-tightening force for the connection between the second sleeve and the first sleeve and the connection between the second sleeve and the third sleeve, reducing the risk of loosening between the first sleeve and the second sleeve and between the third sleeve and the second sleeve, and improving the stability of the sleeve assembly connection.

[0031] In some embodiments, one of the third sleeve and the second sleeve passes through the other and is threaded together.

[0032] By adopting the technical solution of this embodiment, the third sleeve and the second sleeve are connected by a threaded connection, which is simple and has good connection reliability.

[0033] In some embodiments, a second seal is held between the second wall and the second sleeve, and the second seal is disposed around the second sleeve.

[0034] By adopting the technical solution of this embodiment, the second sealing element is used to seal the space between the third sleeve section and the second wall, which helps to improve the sealing effect of the box.

[0035] In some embodiments, the first subwall and / or the second subwall are multi-layered structures.

[0036] By adopting the technical solution of this embodiment, the multi-layer structure design helps to improve the structural stability of the first wall and enhance the reliability of the battery device.

[0037] In some embodiments, the first sub-wall has a flow channel for the flow of heat exchange medium.

[0038] By adopting the technical solution of this embodiment, the first sub-wall can exchange heat with the battery cell through the flow channel, thereby controlling the temperature of the battery cell; while the second sub-wall can protect the first sub-wall, which is beneficial to improving the reliability of the battery device.

[0039] In some embodiments, the box body includes a first box and a second box, the first box having a first wall and a first side wall surrounding the first wall, the first side wall forming a cavity opening, and the second box covering the cavity opening.

[0040] By adopting the technical solution of this embodiment, the main body of the box adopts the structure of a first box and a second box, which facilitates the assembly of the box and the battery cell. In addition, the first sleeve is provided with a first protrusion, which is also beneficial to the overall manufacturing of the first box and simplifies the manufacturing process of the first box.

[0041] In some embodiments, the first housing includes a first plate and a second plate. A recess in the first plate forms a mounting cavity and a cavity opening communicating with the mounting cavity. The first plate has a first cavity wall disposed opposite to the cavity opening. The first cavity wall forms a second sub-wall. The second plate is located inside the mounting cavity and is stacked with the first cavity wall. The second plate forms the first sub-wall.

[0042] By adopting the technical solution of this embodiment, the sleeve assembly of this application embodiment can achieve the assembly of the first box and the sleeve assembly without disassembling the first plate and the second plate, which facilitates the overall processing and manufacturing of the first box, simplifies the manufacturing process of the first box, and reduces the manufacturing cost of the first box.

[0043] In some embodiments, the surface of the first wall facing away from the mounting space is provided with an anti-collision elastic coating, and the anti-collision elastic coating is provided with a fifth through hole for avoiding the first protrusion.

[0044] By adopting the technical solution of this embodiment, the anti-collision elastic coating can resist the impact, scratches and punctures of road gravel and hard objects during vehicle operation, while also having anti-rust, anti-corrosion and sound insulation functions, reducing the risk of damage to the battery device; in addition, the fifth through hole can avoid the first protrusion, so that the first protrusion can directly abut against the second sub-wall instead of abutting against the anti-collision elastic coating. This can reduce the possibility that the anti-collision elastic coating will slowly collapse and deform poorly due to long-term compression, resulting in insufficient clamping force of the first protrusion, causing poor sealing and air leakage, which is beneficial to improving the sealing performance of the battery device.

[0045] Secondly, an electrical device is provided, including the aforementioned battery device.

[0046] By adopting the technical solution of this embodiment, the manufacturing process of the battery device housing is simple, which helps to reduce the manufacturing cost of the battery device and the manufacturing cost of the power-consuming device.

[0047] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0048] 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.

[0049] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0050] Figure 2 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application.

[0051] Figure 3 A schematic diagram of the structure of the housing and sleeve assembly of the battery device provided in some embodiments of this application.

[0052] Figure 4 For along Figure 3 Sectional view along line AA in the middle.

[0053] Figure 5 This is a structural schematic diagram of a first housing and sleeve assembly provided for some embodiments of this application.

[0054] Figure 6 for Figure 5A magnified view of a section at point C.

[0055] Figure 7 for Figure 3 The diagram shows the structure of the sleeve assembly.

[0056] Figure 8 for Figure 7 An exploded view of the sleeve assembly shown.

[0057] Figure 9 For along Figure 3 Sectional view along the middle BB line.

[0058] Figure 10 for Figure 9 A magnified view of a section at point D.

[0059] Figure 11 for Figure 10 A magnified view of a section at point E in the middle.

[0060] The following are the labeling elements in the figure:

[0061] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 101, Installation Space; 102, Receiving Slot; 11, Beam; 111, First Side Wall; 112, Second Side Wall; 113, Third Side Wall; 114, Fourth Side Wall; 115, Partition; 116, Third Through Hole; 1161, Second Sub-Hole; 1162, Third Sub-Hole; 1163, First Sub-Hole; 117 1171. Hollow cavity; 1172. First sub-cavity; 12. First housing; 121. First wall; 1211. First sub-wall; 12111. First through hole; 12112. Flow channel; 1212. Second sub-wall; 12121. Second through hole; 122. First side wall; 123. First plate; 123a. Mounting cavity; 123b. Cavity opening; 1231. First cavity wall; 1232. Second cavity wall; 124. 1. Second plate; 125. Anti-collision elastic coating; 1251. Fifth through hole; 13. Second housing; 131. Second wall; 1311. Fourth through hole; 132. Second side wall; 14. Housing body; 20. Battery cell; 30. Sleeve assembly; 31. First sleeve; 31a. First end; 31b. Second end; 311. First protrusion; 3111. First receiving groove; 312. First sleeve section; 3121. Limiting structure; 3 122. First stepped surface; 313. Second sleeve section; 32. Second sleeve; 32a. Third end; 32b. Fourth end; 321. Third sleeve section; 322. Fourth sleeve section; 3211. Second protrusion; 3212. Second stepped surface; 3213. Engaging structure; 3214. Second receiving groove; 33. Third sleeve; 331. Third protrusion; 34. First seal; 35. Second seal; 36. Third seal. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0064] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0065] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "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 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship 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.

[0068] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0069] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example in the figure. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0070] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0071] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0072] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0073] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0074] The battery assembly comprises individual battery cells, a housing, and a sleeve assembly. The housing has an installation space within which the individual battery cells are located. The housing has a first wall and a second wall arranged opposite each other, and both walls have through holes. The two ends of the sleeve assembly pass through the first and second walls respectively, and are fixedly connected to them, thus connecting the sleeve assembly to the housing. The sleeve assembly extends directly through the entire battery assembly, allowing bolts, screws, connecting rods, and other connecting components to pass through its inner hole, securing the battery assembly and other structures of the electrical device, thereby fixing the battery assembly to the electrical device.

[0075] The battery pack has a sleeve assembly in the middle, which is used to connect to the electrical device. This helps to reduce the deformation of the battery pack when it is hit from the side. The sleeve assembly in the middle passes through the beam of the box, which can increase the installation reliability of the battery pack in the electrical device and also save space.

[0076] In some battery devices, the first wall includes multiple stacked sub-walls to form a multi-layer structure, thereby providing better protection for the battery cells; for example, when the first wall is the bottom wall of the housing, the bottom of the housing is provided with a single-layer bottom protective plate to protect the heat exchange plate, or the bottom of the housing is provided with multiple-layer bottom protective plates to protect the battery cells or heat exchange plate.

[0077] For example, the bottom wall of the housing includes two sub-walls: one is a bottom protective plate, and the other is a heat exchange plate (e.g., a water-cooled plate). The heat exchange plate is located on the side of the bottom protective plate facing the battery cell, and the bottom protective plate protects the heat exchange plate. The sleeve assembly includes a sleeve and a sleeve nut. One end of the sleeve is connected to a second wall (e.g., the top wall of the housing), and the other end of the sleeve passes through the bottom protective plate and the heat exchange plate. The outer circumferential surface of the sleeve has a protrusion located between the bottom protective plate and the heat exchange plate. The sleeve nut is located on the side of the bottom protective plate facing away from the battery cell and is fitted and fixed to the end of the sleeve to securely connect the bottom protective plate and the sleeve. This fixing method requires a protrusion between the heat exchange plate and the bottom cover plate, meaning that the bottom cover plate and the heat exchange plate of the housing must be two separate parts before assembly with the sleeve assembly. Therefore, this method is not suitable for situations where the bottom cover plate and the heat exchange plate of the housing are connected together before assembly with the sleeve assembly. For example, if the housing is a sheet metal housing, the heat exchange plate is fixed to the bottom cover plate before assembly with the sleeve assembly. If a protrusion is placed between the heat exchange plate and the bottom cover plate, the heat exchange plate and the bottom cover plate need to be disassembled before assembly with the sleeve assembly. After assembly, the heat exchange plate and the bottom cover plate are then fixed. This greatly increases the assembly process of the battery device and is not conducive to simplifying the assembly process of the battery device.

[0078] Based on this, this application provides a battery device, which includes a battery cell, a housing, and a sleeve assembly. The housing includes a main body and a beam. The housing includes the main body and the beam connected together. The main body has an installation space and a first wall and a second wall disposed opposite to each other along a first direction. The battery cell is located in the installation space, and the beam is located in the installation space and between the first wall and the second wall. The first wall includes a first sub-wall and a second sub-wall stacked together. The first sub-wall is located on the side of the beam facing the second sub-wall. The first sub-wall has a first through hole, the second sub-wall has a second through hole, and the beam has a third through hole. The first through hole and the second through hole... The hole and the third through hole are connected along the first direction; the sleeve assembly includes a first sleeve and a second sleeve, a portion of the first sleeve passes through the first through hole, the second through hole and the third through hole, one end of the first sleeve is connected to the second wall, and the other end of the first sleeve is provided with a first protrusion, the first protrusion is located on the side of the second sub-wall facing away from the installation space and abuts against the second sub-wall, one end of the second sleeve is connected to the first sleeve, and the other end of the second sleeve is connected to the second wall, at least a portion of the second sleeve is located between the second wall and the beam, and the outer peripheral surface of the portion of the second sleeve located between the beam and the second wall is provided with a locking structure for engaging with an external tool.

[0079] In this embodiment of the battery device, a beam and battery cells are installed within an installation space. The housing has a first wall and a second wall arranged opposite to each other along a first direction. The beam is located between the first wall and the second wall. The first wall includes a first sub-wall and a second sub-wall, with the first sub-wall located between the beam and the second wall. During assembly of the housing and the sleeve assembly, one end of the first sleeve of the sleeve assembly passes through a first through hole in the first sub-wall and a second through hole in the second sub-wall, then passes through a third through hole in the beam and connects to the second wall via the second sleeve. The other end of the first sleeve has a first protrusion located on the side of the second sub-wall facing away from the installation space and abuts against the second sub-wall, thereby achieving the connection between the first sleeve and the housing. The battery device of this application embodiment utilizes a first sleeve to connect the first wall and the sleeve assembly. The first protrusion of the first sleeve is located on the side of the second sub-wall facing away from the installation space, i.e., the outer side of the housing. During assembly, the first sleeve can directly pass through the first and second through holes and abut against the outer surface of the first wall through the first protrusion, thus achieving fixation without disassembling the originally connected first and second sub-walls. This simplifies the battery device assembly process and improves assembly efficiency. Furthermore, the first and second sub-walls can be processed as a single unit (e.g., electrophoresis or other high-temperature treatment processes), which also simplifies the housing manufacturing process, improves manufacturing efficiency, saves housing processing costs, and enhances the feasibility of housing manufacturing. Additionally, the outer circumferential surface of the portion of the second sleeve located between the second wall and the beam is provided with a locking structure. This locking structure can engage with an external tool, allowing the external tool to be fixed to the second sleeve. This enables the external tool to move or rotate the second sleeve to connect with the first sleeve, facilitating the assembly of the first and second sleeves.

[0080] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using the battery device disclosed in this application.

[0081] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric bicycles, electric motorcycles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0082] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0083] Please refer to Figure 1Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery unit 100 is installed inside vehicle 1000, which can be located at the bottom, front, or rear of vehicle 1000. The battery unit 100 can be used to power vehicle 1000; for example, it can serve as the operating power source for vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation.

[0084] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0085] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0086] See below Figures 2-11 The battery device 100 of the present application embodiment will be described. In the drawings, the length direction, width direction and height direction of the battery device 100 can be referred to the X direction, Y direction and Z direction respectively. The axial direction of the first sleeve 31 and the axial direction of the second sleeve 32 can also be referred to the Z direction.

[0087] Please refer to Figure 2 The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0088] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20.

[0089] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 together to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0090] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies housed within the housing 10.

[0091] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0092] As an example, the battery cell assembly can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0093] As an example, the housing 10 may include a first housing 12 and a second housing 13. The first housing 12 and the second housing 13 are fastened together to form a closed space inside the housing 10 for housing the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0094] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms a closed space to accommodate the battery cell assembly; wherein, the frame and the bottom plate may form the aforementioned first housing 12, and the top cover may form the aforementioned second housing 13, or the frame and the bottom plate may form the aforementioned second housing 13, and the top cover may form the first housing 12, or the bottom plate may form the aforementioned first housing 12, and the frame and the top cover may form the second housing 13, or the bottom plate may form the aforementioned second housing 13, and the frame and the top cover may form the first housing 12.

[0095] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0096] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after being discharged by recharging to activate the active materials.

[0097] The battery cell 20 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., and the embodiments of this application are not limited to this.

[0098] A single battery cell 20 typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the single battery cell 20, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits between them while allowing active ions to pass through.

[0099] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0100] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0101] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0102] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0103] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, a positive electrode active material is filled and / or deposited within the foamed metal.

[0104] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0105] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0106] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0107] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0108] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cell 20. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cell 20 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0109] In some embodiments, the negative electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0110] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0111] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0112] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0113] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0114] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0115] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0116] In some embodiments, the battery cell 20 also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0117] Liquid electrolytes include electrolyte salts and solvents.

[0118] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0119] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0120] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell 20, such as additives that improve the overcharge / fast charge performance of the battery cell 20, additives that improve the high-temperature performance of the battery cell 20, additives that improve the low-temperature performance of the battery cell 20, etc.

[0121] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0122] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0123] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0124] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0125] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0126] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0127] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0128] In some implementations, the electrode assembly is a stacked structure.

[0129] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0130] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0131] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0132] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0133] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0134] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0135] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0136] In some embodiments, the battery cell 20 may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly for encapsulating the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0137] As an example, the battery cell 20 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0138] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0139] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0140] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal gas of the battery cell 20.

[0141] As an example, the internal pressure or temperature of the battery cell 20 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20.

[0142] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0143] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0144] The term "actuation" as used in this application refers to the pressure relief mechanism being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the pressure relief mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism, etc. When the pressure relief mechanism is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as waste. This method enables the battery cell 20 to release pressure and temperature under controllable conditions, thereby preventing potentially more serious accidents.

[0145] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell 20.

[0146] The emissions from the battery cell 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0147] Please refer to Figures 3-8 In a first aspect, a battery device 100 is provided, comprising a battery cell 20, a housing 10, and a sleeve assembly 30. The housing 10 includes a main body 14 and a beam 11 connected together. The main body 14 has an installation space 101 and a first wall 121 and a second wall 131 disposed opposite each other along a first direction. The battery cell 20 is located in the installation space 101, and the beam 11 is located in the installation space 101 and between the first wall 121 and the second wall 131. The first wall 121 includes a first sub-wall 1211 and a second sub-wall 1212 stacked together. The first sub-wall 1211 is located on the side of the beam 11 facing the second sub-wall 1212. The beam 11 is provided with a first through hole 12111, the second sub-wall 1212 is provided with a second through hole 12121, and the beam 11 is provided with a third through hole 116. The first through hole 12111, the second through hole 12121, and the third through hole 116 are connected along a first direction. The sleeve assembly 30 includes a first sleeve 31, a portion of which passes through the first through hole 12111, the second through hole 12121, and the third through hole 116. One end of the first sleeve 31 is connected to the second wall 131, and the other end of the first sleeve 31 is provided with a first protrusion 311. The first protrusion 311 is located on the side of the second sub-wall 1212 facing away from the installation space 101 and abuts against the second sub-wall 1212.

[0148] The main body 14 refers to the main part of the housing 10. The main body 14 is used to enclose and form the installation space 101, where the battery cell 20 and the beam 11 are located. The main body 14 has two opposing walls along a first direction, forming a first wall 121 and a second wall 131, respectively. The first direction can refer to the distribution direction of the first wall 121 and the second wall 131. The first direction can be parallel to the axial direction of the first sleeve 31, or parallel to the height direction, width direction, or length direction of the battery device 100.

[0149] In some examples, the main body 14 includes a first housing 12 and a second housing 13, which cover each other and together define an installation space 101 for accommodating the battery cell 20 and the beam 11.

[0150] In some examples, the first housing 12 is a hollow structure with one end open, and the second housing 13 is a plate-like structure. The second housing 13 covers the open side of the first housing 12 so that the first housing 12 and the second housing 13 together define the installation space 101.

[0151] In some examples, the first box 12 and the second box 13 can both be hollow structures with one end open, and the open side of the first box 12 covers the open side of the second box 13.

[0152] The housing 10 formed by the first housing 12 and the second housing 13 can be of various shapes, such as a cylinder or a cuboid. The first housing 12 and the second housing 13 can be connected by means of adhesive, snap-fit, or fasteners. Fasteners can be screws, bolts, or other similar fasteners.

[0153] In some examples, the first box 12 is a hollow structure with an opening at one end, and the wall of the first box 12 opposite to the opening is called the first wall 121, and the wall of the second box 13 opposite to the first wall 121 is called the second wall 131. The first box 12 can be a frame box structure, a sheet metal box structure, or other structures.

[0154] In some examples, the second box 13 is a plate-like structure, which is the first wall 121, and the wall opposite to the first box 12 and the first wall 121 is the second wall 131.

[0155] In some examples, when the battery device 100 is mounted on an electrical device, the bottom wall of the housing 10 is a first wall 121 and the top wall of the housing 10 is a second wall 131; or, the bottom wall of the housing 10 is a second wall 131 and the top wall of the housing 10 is a first wall 121.

[0156] The beam 11 can refer to the beam inside the box 10, and the beam 11 can be a profile beam, sheet metal beam, etc. The beam 11 can be an expansion beam, partition beam, or reinforcing beam in the box 10.

[0157] In some examples, the beam 11 can divide the installation space 101 into two spaces, both of which can house battery cells 20. Alternatively, one space can house battery cells 20, while the other space can house electrical components electrically connected to the battery cells 20, such as high-voltage boxes. The beam 11 can be fixedly connected to the first wall 121, or to any other wall of the first housing 12 other than the first wall 121. The beam 11 can also be fixedly connected to the second wall 131 to improve the structural reliability of the battery device 100.

[0158] The first wall 121 can refer to a wall formed by stacking multiple plates, one of which is the first sub-wall 1211 and the other is the second sub-wall 1212. The plates can be single-layer or multi-layer structures. The first sub-wall 1211 and the second sub-wall 1212 can be fixedly connected to improve the structural reliability of the battery device 100. The first sub-wall 1211 is closer to the beam 11 than the second sub-wall 1212. The first sub-wall 1211 can be the inner layer of the first wall 121, and the second sub-wall 1212 can be the outer layer of the second wall 131. The side closer to the inside of the housing 10 is called the inner side of the first wall 121, and the side closer to the outside of the housing 10 is called the outer side of the first wall 121.

[0159] In some examples, the first wall 121 includes a heat exchange plate and a bottom protective plate. The heat exchange plate can refer to a heat exchange component used for heat exchange with the battery cell 20. The heat exchange plate may have a flow channel 12112, in which the heat exchange medium flows and exchanges heat with the battery cell 20, thereby achieving temperature control of the battery cell 20. The bottom protective plate can refer to a component used to protect the heat exchange plate. The heat exchange plate is installed at the bottom of the first housing 12, and the bottom protective plate is installed below the heat exchange plate. The first sub-wall 1211 is the heat exchange plate, and the second sub-wall 1212 is the bottom protective plate. Both the heat exchange plate and the bottom protective plate can be multi-layer plate structures; of course, the bottom protective plate can also be a single-layer plate structure.

[0160] In some examples, the first wall 121 includes two bottom protective plates, one of which, near the mounting space 101, is the first sub-wall 1211, and the other is the second sub-wall 1212.

[0161] The first sub-wall 1211 is provided with a first through hole 12111, which can penetrate the first sub-wall 1211 along the thickness direction of the first wall 121. The second sub-wall 1212 is provided with a second through hole 12121, which can penetrate the second sub-wall 1212 along the thickness direction of the first wall 121.

[0162] The beam 11 is provided with a third through hole 116, which can penetrate the beam 11 along the first direction. The first through hole 12111, the second through hole 12121 and the third through hole 116 can be arranged approximately coaxially to facilitate the insertion of the first sleeve 31.

[0163] The sleeve assembly 30 can refer to a hollow sleeve component. The sleeve assembly 30 is used for the connection component to pass through, so as to fix the battery device 100 into the electrical device through the connection component. The connection component can be a screw, bolt, connecting rod, connecting sleeve, etc.

[0164] The sleeve assembly 30 includes a first sleeve 31, which is hollow inside and has an inner hole in the middle. This inner hole allows connecting components to pass through, so that the battery device 100 can be fixed inside the electrical device. The two ends of the first sleeve 31 along its length are respectively referred to as the first end 31a and the second end 31b. The first sleeve 31 passes through the first through hole 12111, the second through hole 12121, and the third through hole 116. The second end 31b passes through the first through hole 12111 and the second through hole 12121, while the first end 31a can be located in the third through hole 116 of the beam 11 or can pass through the beam 11.

[0165] In some examples, the first sleeve 31 can be clearance-fitted with the first through hole 12111, the first sleeve 31 can also be clearance-fitted with the second through hole 12121, and the first sleeve 31 can be clearance-fitted with the third through hole 116, so as to facilitate the insertion of the first sleeve 31.

[0166] The outer peripheral surface of the second end 31b is provided with a protruding structure, namely the first protrusion 311. The first protrusion 311 is located on the outside of the first wall 121. The first protrusion 311 abuts against the outer surface of the second sub-wall 1212. At the same time, the second end 31b is connected to the second wall 131, which can realize the connection between the first sleeve 31 and the box 10.

[0167] In some examples, the first protrusion 311 can directly abut against the outer surface of the second sub-wall 1212, or indirectly abut against the outer surface of the second sub-wall 1212 through components such as gaskets, washers, and sealing rings.

[0168] In some examples, the first protrusion 311 can be an annular structure extending around the axis of the first sleeve 31, which helps to increase the contact area between the first protrusion 311 and the second sub-wall 1212, thereby improving the reliability of the connection between the first sleeve 31 and the housing 10. Of course, in other examples, the first protrusion 311 can be an annular array structure extending around the axis of the first sleeve 31, etc.

[0169] The second sleeve 32 can refer to a sleeve component used to connect the first sleeve 31 and the second wall 131. The first sleeve 31 and the second sleeve 32 can be arranged approximately coaxially. The two ends of the second sleeve 32 along its own length direction are a third end 32a and a fourth end 32b, respectively. The third end 32a is connected to the second wall 131, and the fourth end 32b is connected to the first end 31a. The third end 32a and the second wall 131, as well as the fourth end 32b and the first end 31a, can be connected by welding, snap-fitting, bonding, fasteners, threads, etc.

[0170] In some examples, the second sleeve 32 may be located entirely between the second wall 131 and the beam 11, with the end face of the second sleeve 32 facing the beam 11 abutting against the beam 11.

[0171] In some examples, a portion of the second sleeve 32 is located between the second wall 131 and the beam 11. For example, the second sleeve 32 is not inserted into the third through hole 116, and the end face of the second sleeve 32 facing the beam 11 abuts against the beam 11.

[0172] The second sleeve 32 is located between the beam 11 and the second wall 131. The outer circumferential surface of the portion of the second sleeve 32 located between the beam 11 and the second wall 131 is provided with a locking structure 3213 for engaging with an external tool. The locking structure 3213 can be a flat surface, a groove, or a protrusion. The external tool can be a wrench, etc.

[0173] In some examples, a portion of the second sleeve 32 passes through the first sleeve 31, and another portion of the second sleeve 32 is located between the beam 11 and the second wall 131. The outer circumferential surface of the portion of the second sleeve 32 that protrudes from the beam 11 is provided with a locking structure 3213.

[0174] By adopting the technical solution of this embodiment, when the housing 10 and the sleeve assembly 30 are assembled, one end of the first sleeve 31 of the sleeve assembly 30 passes through the first through hole 12111 of the first sub-wall 1211 and the second through hole 12121 of the second sub-wall 1212, and then connects to the second wall 131 through the third through hole 116 of the beam 11 and the second sleeve 32. The other end of the first sleeve 31 is provided with a first protrusion 311. The first protrusion 311 is located on the side of the second sub-wall 1212 facing away from the installation space 101 and abuts against the second sub-wall 1212, thereby realizing the connection between the first sleeve 31 and the housing 10. The battery device 100 of this application embodiment uses a first sleeve 31 to connect the first wall 121 to the sleeve assembly 30. The first protrusion 311 of the first sleeve 31 is located on the side of the second sub-wall 1212 facing away from the mounting space 101, that is, the outer side of the housing 10. In this way, during assembly, the first sleeve 31 can directly pass through the first through hole 12111 and the second through hole 12121, and abut against the outer surface of the first wall 121 through the first protrusion 311, thereby achieving fixation. There is no need to disassemble the first sub-wall 1211 and the second sub-wall 1212 that were originally connected together, which simplifies the assembly process of the battery device 100 and improves the assembly efficiency of the battery device 100. In addition, the first sub-wall 1211 and the second sub-wall 1212 can be processed as a whole (e.g., electrophoresis or other high-temperature treatment processes, etc.), which also simplifies the manufacturing process of the housing 10, improves the manufacturing efficiency of the housing 10, saves the processing cost of the housing 10, and improves the feasibility of the manufacturing process of the housing 10. In addition, the outer peripheral surface of the portion of the second sleeve 32 located between the second wall 131 and the beam 11 is provided with a locking structure 3213. The locking structure 3213 can be engaged with an external tool, which can fix the external tool to the second sleeve 32. Thus, the external tool can be used to drive the second sleeve 32 to move or rotate, etc., to connect with the first sleeve 31, which facilitates the assembly of the first sleeve 31 and the second sleeve 32.

[0175] The first protrusion 311 of the first sleeve 31 is located on the outside of the housing 10, allowing the first sleeve 31 to be directly disassembled without removing the second sub-wall 1212, thus improving the convenience of maintenance and replacement of the sleeve assembly 30. Furthermore, the direct connection between the first sleeve 31 and the first wall 121 simplifies the structure of the sleeve assembly 30, saves space, reduces the assembly complexity between the sleeve assembly 30 and the first wall 121, and improves the operational stability of the battery device 100. The first sleeve 31 passes through the third through hole 116 of the beam 11, facilitating the connection between the middle of the battery device 100 and the power-consuming device, improving the reliability of the connection, saving space within the housing 10, and increasing the volumetric energy density of the battery device 100.

[0176] The battery device 100 eliminates the protrusion between the first sub-wall 1211 and the second sub-wall 1212, allowing the first sub-wall 1211 and the second sub-wall 1212 to fit together, thus reducing the axial dimension of the battery device 100 along the sleeve assembly 30. Furthermore, by utilizing the first protrusion 311 to abut against the first wall 121, the sleeve component for fixing the first sleeve 31 to the first wall 121 is eliminated, simplifying the structure of the sleeve assembly 30, reducing the number of components in the sleeve assembly 30, and lowering the manufacturing cost of the battery device 100. The first sleeve 31 has a first protrusion 311 on the outside of the housing 10. The thickness of the first protrusion 311 can be set to be relatively small, thereby reducing the axial dimension of the battery device 100 along the sleeve assembly 30. Alternatively, while keeping the axial dimension of the battery device 100 along the sleeve assembly 30 unchanged, the thickness of the first protrusion 311 can be set relatively small to increase the space of the installation space 101.

[0177] The sleeve assembly 30 is inserted into the beam 11. When the side of the housing 10 is subjected to static and dynamic lateral compression, the sleeve assembly 30, inserted into the third through hole 116, can support the beam 11. In addition, the sleeve assembly 30 can also fix the first wall 121, the beam 11, and the second wall 131, which helps to reduce the deformation of the first wall 121, the second wall 131, and the beam 11 under side impact, and also reduces the deformation of the battery device 100. In particular, when the second wall 131 serves as the floor of the vehicle 1000 or is stacked with the floor of the vehicle 1000, it can reduce the possibility of deformation and wrinkling of the floor of the vehicle 1000.

[0178] In some embodiments, the second wall 131 is provided with a fourth through hole 1311, which communicates with the first sleeve 31.

[0179] In some examples, the first sleeve 31 can be directly inserted into the fourth through hole 1311, thereby enabling the first sleeve 31 to communicate with the fourth through hole 1311. Alternatively, the first sleeve 31 can be connected to the fourth through hole 1311 after being transferred through other sleeve components (e.g., the second sleeve 32, the third sleeve 33, etc.).

[0180] During the process of fixing the battery device 100 to the electrical device, the first sleeve 31 is connected to the fourth through hole 1311, so that the connecting component can directly pass through the inner hole of the first sleeve 31 through the battery device 100 and then be fixed to the electrical device, thereby realizing the fixing of the battery device 100 in the electrical device.

[0181] In some examples, the connecting component may be a double-ended bolt, which passes through the first sleeve 31. One end of the double-ended bolt is connected to the battery device 100, and the other end is connected to the electrical device, thereby fixing the battery device 100 within the electrical device.

[0182] Reference Figure 4 In some embodiments, the second sub-wall 1212 has a receiving groove 102 located on the side of the second sub-wall 1212 facing away from the mounting space 101, and at least a portion of the first protrusion 311 is accommodated in the receiving groove 102.

[0183] The receiving groove 102 can refer to the groove structure formed on the outer side of the second sub-wall 1212. The first protrusion 311 can be partially located in the receiving groove 102 or entirely located in the receiving groove 102.

[0184] In some examples, the space formed by the second sub-wall 1212 recessed into the mounting space 101 at the second through hole 12121 is the receiving groove 102. This eliminates the need to remove material from the second sub-wall 1212, which helps to improve the structural strength of the second sub-wall 1212.

[0185] By adopting the technical solution of this embodiment, at least a portion of the first protrusion 311 is located in the receiving groove 102, which can reduce the protrusion distance of the first protrusion 311 from the outer surface of the second sub-wall 1212, thus protecting the first sleeve 31 and improving the reliability of the battery device 100.

[0186] Reference Figure 4 In some embodiments, a first seal 34 is held between the first protrusion 311 and the second sub-wall 1212, and the first seal 34 is disposed around the first sleeve 31.

[0187] The first sealing element 34 can refer to a sealing component sandwiched between the first protrusion 311 and the second sub-wall 1212. The first sealing element 34 can be a sealant, a sealing ring, a sealing gasket, etc. The first protrusion 311 can be an annular structure extending around the axis of the first sleeve 31, and the first sealing element 34 can also be an annular structure extending around the axis of the first sleeve 31, so as to achieve circumferential sealing between the first sleeve 31 and the first wall 121.

[0188] In some examples, the first seal 34 is a sealing ring, which is sleeved on the first sleeve 31 and clamped between the outer surfaces of the first protrusion 311 and the second sub-wall 1212, thereby achieving a seal between the first protrusion 311 and the second sub-wall 1212.

[0189] In some cases, the protrusion is located between the first sub-wall 1211 and the second sub-wall 1212. Sealing components are required between the protrusion and the first sub-wall 1211, and between the protrusion and the second sub-wall 1212. The presence of numerous sealing components and sealing interfaces negatively impacts the sealing reliability of the battery device 100. Compared to the method where sealing components are required between the protrusion and the first sub-wall 1211, and between the protrusion and the second sub-wall 1212, the battery device 100 in this embodiment utilizes a first sealing element 34 for sealing. This reduces the number of sealing components and sealing interfaces, thus improving the sealing reliability of the battery device 100.

[0190] Reference Figures 5-8 In some embodiments, the surface of the first protrusion 311 is provided with a first receiving groove 3111, and the first seal 34 is received in the first receiving groove 3111 to facilitate the installation and sealing of the first seal 34.

[0191] See Figures 5-8 In some embodiments, the first sleeve 31 includes a first sleeve section 312 and a second sleeve section 313 connected to each other. The first sleeve section 312 is provided with a first protrusion 311. A portion of the first sleeve section 312 passes through the first through hole 12111, the second through hole 12121, and the third through hole 116. At least a portion of the second sleeve section 313 passes through the third through hole 116 and is connected to the second wall 131. The diameter of the first sleeve section 312 is larger than the diameter of the second sleeve section 313.

[0192] The first sleeve 31 is a stepped sleeve. The section of the first sleeve 31 near the first wall 121 is the first sleeve section 312, and the section near the second wall 131 is the second sleeve section 313. The first sleeve section 312 passes through the first through hole 12111, the second through hole 12121, and the third through hole 116. The second sleeve section 313 may be partially located in the third through hole 116 or entirely located in the third through hole 116. The first sleeve section 312 and the second sleeve section 313 are approximately coaxially arranged. The outer diameter of the first sleeve section 312 is larger than the outer diameter of the second sleeve section 313, that is, the outer diameter of the first sleeve section 312 is D1, and the outer diameter of the second sleeve section 313 is D2, where D1 > D2.

[0193] In some examples, the outer diameter of the first sleeve segment 312 is larger than the outer diameter of the second sleeve segment 313, thereby forming an annular plane between the first sleeve segment 312 and the second sleeve segment 313. This annular plane is the first step surface 3122. The first sleeve segment 312 and the second sleeve segment 313 can also be divided by the first step surface 3122.

[0194] The connection method between the first sleeve section 312 and the second sleeve section 313 can also be, but is not limited to, bolt connection, bonding, snap-fit, riveting, welding, and integral molding. Among them, integral molding refers to the use of extrusion, injection molding, die casting, or other integrated processes to form the sleeve.

[0195] When the side of the box 10 is subjected to static and dynamic compression, the first wall 121 deforms, causing the first sleeve 31 to be subjected to a large shear force at the interface between the first wall 121 and the beam 11. If the outer diameter of the first sleeve 31 at the interface between the first wall 121 and the beam 11 is larger, the risk of the first sleeve 31 being sheared is smaller. Therefore, the first sleeve section 312 is inserted through the first through hole 12111, the second through hole 12121, and the third through hole 116, so that the first sleeve section 312 is located at the interface between the first wall 121 and the beam 11. The outer diameter of the first sleeve section 312 is larger than the outer diameter of the second sleeve section 313, so that the first sleeve 31 has a larger outer diameter at the interface between the first wall 121 and the beam 11, which is beneficial to improving the shear resistance of the first sleeve 31 and reducing the possibility of the first sleeve 31 being sheared.

[0196] Reference Figure 4 In some embodiments, the second sleeve 32 abuts against the end face of the beam 11 facing the second wall 131.

[0197] For example, the second sleeve 32 is inserted into the third through hole 116. The outer peripheral surface of the second sleeve 32 is provided with a second step surface 3212, which abuts against the end face of the beam 11. The second step surface 3212 divides the second sleeve 32 into a third sleeve section 321 and a fourth sleeve section 322. The third sleeve section 321 is located in the third through hole 116, and the fourth sleeve section 322 is located between the second wall 131 and the beam 11.

[0198] For example, the second sleeve 32 can be a stepped sleeve, and the outer diameters of the third sleeve section 321 and the fourth sleeve section 322 are different. The outer diameter of the third sleeve section 321 is larger than that of the fourth sleeve section 322, thereby forming an annular plane between the third sleeve section 321 and the fourth sleeve section 322. This annular plane is the second stepped surface 3212.

[0199] In some examples, the outer peripheral surface of the third sleeve section 321 is provided with a second protrusion 3211, which is located between the beam 11 and the second wall 131 and abuts against the surface of the beam 11. The second protrusion 3211 forms a second stepped surface 3212 near the surface of the beam 11.

[0200] The second step surface 3212 can directly abut against the end face of the beam 11, or indirectly abut against the end face of the beam 11 through components such as gaskets, washers, and sealing rings.

[0201] In the assembly process of some battery devices 100, the battery cells 20 need to be installed into the installation space 101 first, then the second wall needs to be installed, then the box 10 containing the battery cells 20 needs to be lifted as a whole, and then the first sleeve 31 needs to be inserted into the first through hole 12111, the second through hole 12121 and the third through hole 116 before being fixed to the second wall 131. However, the box 10 containing the battery cells 20 is relatively heavy, and lifting the heavy box 10 is not conducive to reducing the assembly difficulty of the battery device 100. By adopting the technical solution of this embodiment, the second sleeve 32 abuts against the surface of the beam 11 facing the second wall 131, and the first wall 121 abuts against the first protrusion 311, so that the second sleeve 32 and the first sleeve 31 can be fixed to the first wall 121 and the beam 11. In this way, during assembly, the first sleeve 31 and the second sleeve 32 can be fixed to the first wall 121 and the beam 11 first, then the battery cell 20 can be installed, and finally the second wall 131 can be installed. In this process, before the battery cell 20 is installed, the first sleeve 31 can be fixed to the first wall 121 and the beam 11 using the second sleeve 32, and the lighter first wall 121 and the beam 11 can be lifted to realize the installation of the first sleeve 31, which reduces the assembly difficulty of the battery device 100 and helps to improve the efficiency of the battery device 100.

[0202] Reference Figure 4 In some embodiments, the first sleeve 31 is inserted into the second sleeve 32, and the second sleeve 32 is inserted into the third through hole 116.

[0203] In some examples, the fourth sleeve section 322 is inserted into the third through hole 116, and part of the second sleeve 32 extends into the beam 11. This helps to shorten the distance between the beam 11 and the second wall 131 while keeping the length of the second sleeve 32 unchanged, thereby helping to reduce the size of the battery device 100 along the axial direction of the second sleeve 32. In addition, the insertion of the second sleeve 32 into the beam 11 helps to improve the deformation resistance of the beam 11 and improve the structural strength of the battery device 100.

[0204] The first sleeve 31 is inserted into the fourth sleeve section 322, and the first end 31a of the first sleeve 31 is inserted into the inner hole of the fourth sleeve section 322.

[0205] In some examples, the second sleeve section 313 passes through the inner hole of the fourth sleeve section 322.

[0206] In some examples, the second sleeve section 313 is fully or partially inserted into the fourth sleeve section 322. The second sleeve section 313 can be fixedly connected to the fourth sleeve section 322 by means of bonding, welding, threading, etc.

[0207] For example, the second sleeve section 313 is completely located within the fourth sleeve section 322, and the second sleeve section 313 and the fourth sleeve section 322 coincide axially with the first sleeve 31; or, the second sleeve section 313 passes through the fourth sleeve section 322 and extends into the third sleeve section 321, with a portion of the second sleeve section 313 located within the fourth sleeve section 322 and a portion located within the third sleeve section 321; or, a portion of the second sleeve section 313 extends into the fourth sleeve section 322, and a portion does not extend into the fourth sleeve section 322.

[0208] The second sleeve section 313 is inserted into the fourth sleeve section 322. The second sleeve section 313 is located inside the inner hole of the fourth sleeve section 322, which allows the outer diameter of the fourth sleeve section 322 to be larger than the outer diameter of the second sleeve section 313. The outer diameter of the fourth sleeve section 322 is D3, where D3 > D2.

[0209] In some cases, when the battery device 100 is subjected to a side impact, the impact force is transmitted to the side of the battery device 100, which in turn laterally compresses the second wall 131. This causes the sleeve assembly 30 to withstand a large shear force on the surface of the beam 11 facing the second wall 131. The larger the outer diameter of the sleeve assembly 30 on the surface of the beam 11 facing the second wall 131, the stronger the shear resistance of the sleeve assembly 30 on the surface of the beam 11 facing the second wall 131, and the lower the probability of the sleeve assembly 30 being sheared.

[0210] With the outer diameter of the second sleeve section 313 remaining unchanged, and the second sleeve 32 not extending into the third through hole 116, the outer diameter of the sleeve assembly 30 at the end face of the beam 11 facing the second wall 131 can be equal to the outer diameter of the second sleeve section 313. However, if the second sleeve 32 extends into the third through hole 116 and the second sleeve section 313 extends into the fourth sleeve section 322, the outer diameter of the sleeve assembly 30 at the end face of the beam 11 facing the second wall 131 can be equal to the outer diameter of the fourth sleeve section 322. This increases the outer diameter of the sleeve assembly 30 at the end face of the beam 11 facing the second wall 131, resulting in a larger outer diameter on the surface of the beam 11 facing the second wall 131. This provides better shear resistance, improves the structural strength of the sleeve assembly 30, and enhances the shear and lateral deformation resistance of the beam and the entire vehicle.

[0211] In some embodiments, the beam 11 has a hollow cavity 117, and a partition 115 is provided in the hollow cavity 117. The partition 115 divides the hollow cavity 117 into a first sub-cavity 1171 and a second sub-cavity 1172 distributed along a first direction, and a third through hole 116 penetrates the partition 115.

[0212] The beam 11 is a hollow beam 11, which helps to reduce the weight of the battery device 100. The internal space of the beam 11 forms a hollow cavity 117. The hollow cavity 117 is provided with a partition 115, which divides the hollow cavity 117 into a first sub-cavity 1171 and a second sub-cavity 1172. The first sub-cavity 1171 and the second sub-cavity 1172 are distributed along a first direction. The third through hole 116 penetrates the through hole formed by the partition 115 and forms the first sub-hole 1163. The second sleeve 32 is not inserted into the first sub-hole 1163, and the first sleeve 31 is inserted into the first sub-hole 1163; or, the second sleeve 32 is inserted into the first sub-hole 1163, and the first sleeve 31 is not inserted into the first sub-hole 1163; or, the first sleeve 31 and the second sleeve 32 are inserted into the first sub-hole 1163.

[0213] In some examples, the beam 11 has a first sidewall portion 111, a second sidewall portion 112, a third sidewall portion 113, and a fourth sidewall portion 114. The first sidewall portion 111 and the third sidewall portion 113 are spaced apart along the axial direction of the first sleeve 31. The first sidewall portion 111 is closer to the first wall 121 than the third sidewall portion 113. The two ends of the second sidewall portion 112 are respectively connected to the ends of the first sidewall portion 111 and the third sidewall portion 113 located on the same side. The two ends of the fourth sidewall portion 114 are respectively connected to the ends of the first sidewall portion 111 and the third sidewall portion 113 located on the opposite side. The two ends of the partition portion 115 are respectively connected to the second sidewall portion 112 and the fourth sidewall portion 114. The partition portion 115 is located between the first sidewall portion 111 and the third sidewall portion 113. In this configuration, the first sub-cavity 1171 is located between the partition portion 115 and the first sidewall portion 111, and the second sub-cavity 1172 is located between the partition portion 115 and the third sidewall portion 113; or, the second sub-cavity 1172 is located between the partition portion 115 and the first sidewall portion 111, and the first sub-cavity 1171 is located between the partition portion 115 and the third sidewall portion 113; the third through hole 116 penetrates the first sidewall portion 111 to form the second sub-hole 1161, the third through hole 116 penetrates the third sidewall portion 113 to form the third sub-hole 1162, the third through hole 116 penetrates the partition portion 115 to form the first sub-hole 1163, the first sleeve 31 passes through the second sub-hole 1161, the second sleeve 32 passes through the third sub-hole 1162, and the first stepped surface 3122 abuts against the third sidewall portion 113.

[0214] The beam 11 is hollow inside. The first sidewall 111, second sidewall 112, third sidewall 113, and fourth sidewall 114 are connected end-to-end to form the internal cavity of the beam 11. The first sidewall 111, second sidewall, third sidewall 113, and fourth sidewall 114 constitute the frame structure of the beam 11, and the partition 115 is the internal partition structure of the beam 11. The beam 11 can be a profile beam, sheet metal beam, etc.

[0215] The first sidewall portion 111 and the third sidewall portion 113 are spaced apart along the axial direction of the first sleeve 31 and are relatively parallel. The first sidewall portion 111 is located near the first wall 121, and the third sidewall portion 113 is located near the second wall 131. The second sidewall portion 112 and the fourth sidewall portion 114 are located on both sides of the first sidewall portion 111 and the third sidewall portion 113, respectively. The two ends of the second sidewall portion 112 are respectively fixedly connected to the ends of the first sidewall portion 111 and the third sidewall portion 113 on the same side, and the two ends of the fourth sidewall portion 114 are respectively fixedly connected to the ends of the first sidewall portion 111 and the third sidewall portion 113 on the other side. Through the connection of the second sidewall portion 112 and the fourth sidewall portion 114, the first sidewall portion 111 and the third sidewall portion 113 are firmly connected into one body, forming the frame outline of the beam body 11 and improving the overall structural strength of the beam body 11.

[0216] The partition 115 is a plate-shaped structure. The partition 115 is located inside the beam 11. The two ends of the partition 115 are fixedly connected to the inner sidewalls of the second sidewall 112 and the fourth sidewall 114, respectively. The partition 115 is located between the first sidewall 111 and the third sidewall 113.

[0217] The beam 11 is provided with a third through hole 116 that runs through the entire beam. The third through hole 116 extends along the axial direction of the first sleeve 31 and passes through each component of the beam 11 in sequence to form corresponding sub-holes: the portion of the third through hole 116 that passes through the first side wall portion 111 forms the second sub-hole 1161, the portion that passes through the third side wall portion 113 forms the third sub-hole 1162, and the portion that passes through the partition portion 115 forms the first sub-hole 1163. The second sub-hole 1161, the third sub-hole 1162, and the first sub-hole 1163 are arranged approximately coaxially, so that the first sleeve 31 and the second sleeve 32 can be smoothly inserted and connected.

[0218] The first sleeve 31 passes through the second sub-hole 1161, allowing it to be inserted into the beam 11. The second sleeve 32 passes through the third sub-hole 1162, allowing it to be inserted into the beam 11. A second protrusion 3211 on the outer circumferential surface of the second sleeve 32 abuts against the surface of the third sidewall portion 113, thereby providing support for the beam 11. Alternatively, the second sleeve 32 may not pass through the first sub-hole 1163, but the first sleeve 31 may pass through the first sub-hole 1163 to connect with the second sleeve 32; or the first sleeve 31 may not pass through the first sub-hole 1163, but the second sleeve 32 may pass through the first sub-hole 1163 to connect with the first sleeve 31; or both the first sleeve 31 and the second sleeve 32 may pass through the first sub-hole 1163 to facilitate connection between the second sleeve 32 and the first sleeve 31.

[0219] By adopting the technical solution of this embodiment, a partition 115 is provided inside the beam 11. The partition 115 can enhance the structural rigidity of the beam 11 and reduce the deformation of the beam 11 during the stress process.

[0220] See Figure 4 In some embodiments, the third through hole 116 penetrates the partition portion 115 to form the first sub-hole 1163, and the second sleeve 32 is inserted into the first sub-hole 1163.

[0221] In some examples, the fourth sleeve section 322 passes through the first sub-hole 1163 and protrudes from the surface of the partition portion 115 toward the first sidewall portion 111.

[0222] By adopting the technical solution of this embodiment, the fourth sleeve section 322 is inserted into the first sub-hole 1163, the fourth sleeve section 322 passes through the partition part 115, the second sleeve 32 is inserted into the beam body 11 to a greater depth, and the fourth sleeve section 322 can also support the partition part 115, which is beneficial to improving the support capacity and deformation resistance of the beam body 11.

[0223] See Figure 4 In some embodiments, the first sleeve 31 and the second sleeve 32 are threaded together.

[0224] In some examples, the second sleeve section 313 is inserted into the fourth sleeve section 322. The second sleeve section 313 is provided with external threads, and the fourth sleeve section 322 is provided with internal threads. The first sleeve 31 and the second sleeve 32 are connected by the meshing of the internal and external threads. The threaded connection method is simple and facilitates the assembly of the first sleeve 31 and the second sleeve 32.

[0225] In some examples, the second sleeve section 313 is inserted into the third sleeve section 321 and the fourth sleeve section 322. The second sleeve section 313 is provided with external threads, and the third sleeve section 321 is provided with internal threads. Alternatively, both the third sleeve section 321 and the fourth sleeve section 322 are provided with internal threads. The first sleeve 31 and the second sleeve 32 are connected by the meshing of the internal and external threads. The threaded connection method is simple and facilitates the assembly of the first sleeve 31 and the second sleeve 32.

[0226] By adopting the technical solution of this embodiment, the first sleeve 31 and the second sleeve 32 are connected by threads, which is simple and facilitates the assembly of the first sleeve 31 and the second sleeve 32. In addition, part of the second sleeve 32 abuts against the end face of the beam facing the second wall, and the beam can provide pre-tightening force to the second sleeve, which helps to reduce the possibility of the second sleeve 32 twisting and improves the connection reliability of the sleeve assembly 30.

[0227] In some embodiments, at least a portion of the threaded connection area between the first sleeve 31 and the second sleeve 32 is located within the third through hole 116.

[0228] The threaded connection area between the first sleeve 31 and the second sleeve 32 can refer to the area formed by the threaded connection between the first sleeve 31 and the second sleeve 32. The threaded connection area is located inside the third through hole 116, that is, inside the beam body 11. The threaded connection area can be partially located inside the third through hole 116 or entirely located inside the third through hole 116.

[0229] By adopting the technical solution of this embodiment, the threaded connection area of ​​the first sleeve 31 and the second sleeve 32 is located in the third through hole 116. The threaded connection area of ​​the first sleeve 31 and the second sleeve 32 has good structural strength and can play a good supporting role for the beam 11, which is conducive to improving the deformation resistance of the beam 11 and the deformation resistance of the battery device 100.

[0230] See Figures 4-8 In some embodiments, the second wall 131 is provided with a fourth through hole 1311, and the sleeve assembly 30 further includes a third sleeve 33 connected to the second sleeve 32. At least a portion of the third sleeve 33 is located on the side of the second wall 131 facing away from the mounting space 101. The second sleeve 32 and / or the third sleeve 33 pass through the fourth through hole 1311. At least a portion of the third sleeve 33, a portion of the second wall 131, and at least a portion of the second sleeve 32 are stacked along a first direction, such that the third sleeve 33 and the second sleeve 32 together clamp the second wall 131.

[0231] The third sleeve 33 can refer to a sleeve component used to fix the third sleeve section 321 to the second wall 131. The third sleeve 33 and the second sleeve 32 can be connected approximately coaxially, so that the inner hole of the third sleeve 33 can communicate with the inner hole of the second sleeve 32, and the connecting component can pass through the second sleeve 32 and the third sleeve 33 to be fixedly connected to the electrical device.

[0232] In some examples, the third sleeve 33 may be located entirely on the side of the second wall 131 facing away from the mounting space 101, and the second sleeve 32 passes through the fourth through hole 1311 to connect with the third sleeve 33 and clamp the second wall 131.

[0233] In some examples, a portion of the third sleeve 33 is located on the side of the second wall 131 facing away from the mounting space 101, and another portion of the third sleeve 33 passes through the fourth through hole 1311 and connects to the second sleeve 32. The portion of the third sleeve 33 located on the side of the second wall 131 facing away from the mounting space 101 and the second sleeve 32 clamp the second wall 131.

[0234] In some examples, one end of the third sleeve 33 is connected to the third sleeve section 321, and the other end of the third sleeve 33 is located outside the housing 10. The end of the third sleeve 33 located outside the housing 10 is provided with a third protrusion 331. The third protrusion 331 is used to abut against the outer surface of the second wall 131, and the inner surface of the second wall 131 abuts against the end face of the third sleeve section 321, thereby clamping the second wall 131 and thus fixing the second sleeve 32 to the second wall 131.

[0235] In some examples, the third protrusion 331 can be an annular structure extending around the axis of the third sleeve 33, which helps to increase the contact area between the third protrusion 331 and the second wall 131, thereby improving the reliability of the connection. Of course, in other examples, the third protrusion 331 can be an annular array structure extending around the axis of the third sleeve 33, etc.

[0236] By adopting the technical solution of this embodiment, the second sleeve 32 abuts against the beam 11 and the second wall 131 is clamped between the third sleeve 33 and the second sleeve 32. In this way, the beam 11 can provide support force to the second sleeve 32, and the second wall 131 can provide support force to the third sleeve 33, thereby providing pre-tightening force for the connection between the second sleeve 32 and the first sleeve 31 and the connection between the second sleeve 32 and the third sleeve 33, reducing the risk of loosening between the first sleeve 31 and the second sleeve 32 and between the third sleeve 33 and the second sleeve 32, and improving the stability of the sleeve assembly 30 connection.

[0237] See Figures 4-8 In some embodiments, one of the third sleeve 33 and the second sleeve 32 passes through the other and is threadedly connected.

[0238] In some examples, the third sleeve 33 passes through the fourth through hole 1311 and is inserted into the third sleeve section 321. The outer circumferential surface of the third sleeve 33 is provided with external threads, and the third sleeve section 321 is provided with internal threads. Through the meshing of the internal and external threads, the third sleeve 33 and the second sleeve 32 are threadedly connected. The threaded connection between the third sleeve 33 and the second sleeve 32 is simple and reliable. The third sleeve 33 passes through the fourth through hole 1311, and the third protrusion 331 and the third sleeve section 321 clamp the second wall 131, so that the third sleeve section 321 is located inside the housing 10, and the second sleeve 32 does not protrude outside the housing 10, which helps to reduce the axial dimension of the battery device 100 along the second sleeve 32.

[0239] In some examples, the second sleeve 32 passes through the fourth through hole 1311 and is inserted into the third sleeve 33. The outer circumferential surface of the second sleeve 32 is provided with external threads, and the third sleeve 33 is provided with internal threads. The threaded connection between the third sleeve 33 and the second sleeve 32 is achieved through the meshing of the internal and external threads.

[0240] By adopting the technical solution of this embodiment, the third sleeve 33 and the second sleeve 32 are connected by a threaded connection, which is simple and has good connection reliability.

[0241] In some embodiments, the second sleeve 32 abuts against the beam 11 and is clamped between the third sleeve 33 and the second sleeve 32 by the second wall 131, so that the beam 11 can provide support force to the second sleeve 32 and the second wall 131 can provide support force to the third sleeve 33, thereby providing preload force to the threaded connection between the second sleeve 32 and the first sleeve 31 and the threaded connection between the second sleeve 32 and the third sleeve 33, thereby reducing the risk of unwinding between the first sleeve 31 and the second sleeve 32 and between the third sleeve 33 and the second sleeve 32, and improving the stability of the sleeve assembly 30 connection.

[0242] See Figure 7 and Figure 8 In some embodiments, the first sleeve 31 is provided with a limiting structure 3121 for restricting the rotation of the first sleeve 31 within the first through hole 12111 and / or the second through hole 12121.

[0243] The limiting structure 3121 can be a plane, a groove, or a protrusion; the inner wall of the first through hole 12111 and / or the second through hole 12121 can be a plane, a protrusion, or a groove that is compatible with it.

[0244] By adopting the technical solution of this embodiment, the outer peripheral surface of the first sleeve 31 is provided with a limiting structure 3121. The limiting structure 3121 cooperates with the inner wall of the first through hole 12111 and / or the second through hole 12121 to restrict the rotation of the first sleeve 31 in the first through hole 12111 and / or the second through hole 12121, so as to realize the rotational tightening of the first sleeve 31 and the second sleeve 32.

[0245] See Figure 7 and Figure 8 In some embodiments, the outer peripheral surface of the third sleeve section 321 is provided with a locking structure 3213, which is used to cooperate with an external tool to facilitate the rotation of the second sleeve 32, thereby tightening the first sleeve 31 and the second sleeve 32.

[0246] See Figures 4-8 In some embodiments, a second seal 35 is held between the second wall 131 and the second sleeve 32, and the second seal 35 is disposed around the second sleeve 32.

[0247] The second sealing element 35 can refer to a sealing component sandwiched between the end faces of the second wall 131 and the third sleeve section 321. The second sealing element 35 can be a sealant, a sealing ring, a sealing gasket, etc. The second sealing element 35 can also be an annular structure extending around the axis of the second sleeve 32 to achieve circumferential sealing between the second sleeve 32 and the second wall 131.

[0248] In some examples, the second seal 35 is a sealing ring located inside the housing 10. The sealing ring is sleeved on the third sleeve 33 and clamped between the end face of the third end 32a and the inner surface of the second wall 131, thereby achieving a sealed connection between the second sleeve 32 and the second wall 131.

[0249] By adopting the technical solution of this embodiment, the second sealing element 35 is used to seal the space between the third sleeve section 321 and the second wall 131, which helps to improve the sealing effect of the housing 10.

[0250] See Figures 4-8 In some embodiments, the end face of the third sleeve section 321 is provided with a second receiving groove 3214, and the second sealing member 35 is received in the second receiving groove 3214 to facilitate the installation and sealing of the second sealing member 35.

[0251] See Figure 4 In some embodiments, the second sleeve section 313 is inserted into the fourth sleeve section 322, and a third sealing element 36 is sandwiched between the outer peripheral surface of the second sleeve section 313 and the inner wall surface of the fourth sleeve section 322. The third sealing element 36 is sleeved outside the second sleeve section 313, and the third sealing element 36 can achieve a seal between the first sleeve 31 and the second sleeve 32, which is beneficial to improving the sealing effect of the housing 10. The third sealing element 36 can be a sealant, a sealing ring, a sealing gasket, etc.

[0252] See Figures 9-11 In some embodiments, the first sub-wall 1211 and / or the second sub-wall 1212 are multi-layered structures.

[0253] The first sub-wall 1211 adopts a multi-layer structure; or, the second sub-wall 1212 adopts a multi-layer structure; or, both the first sub-wall 1211 and the second sub-wall 1212 adopt a multi-layer structure.

[0254] A multi-layer structure can refer to a structure formed by stacking at least two layers of boards. The boards in different layers can be made of the same or different materials, such as metal boards or composite material boards. The boards can be fixed together by welding, bonding, bolting, or other methods.

[0255] By adopting the technical solution of this embodiment, the multi-layer structure design is beneficial to improving the structural stability of the first wall 121 and enhancing the reliability of the battery device 100.

[0256] In some embodiments, the first sub-wall 1211 has a flow channel 12112 for supplying heat exchange medium flow.

[0257] The first sub-wall 1211 has a flow channel 12112 inside, and the heat exchange medium flows in the flow channel 12112 and exchanges heat with the battery cell 20, thereby realizing the temperature control of the battery cell 20. The flow channel 12112 can adopt a serpentine, straight or bent structure.

[0258] In some examples, the first sub-wall 1211 is a heat exchange plate, such as a water-cooled plate.

[0259] In some examples, the first sub-wall 1211 is a single-layer structure, and the flow channel 12112 can be formed directly inside the first sub-wall 1211 through machining, stamping and other processes.

[0260] In some examples, the first sub-wall 1211 is a multi-layered structure, and the flow channel 12112 can be formed by stacking multiple layers of plates.

[0261] By adopting the technical solution of this embodiment, the first sub-wall 1211 can exchange heat with the battery cell 20 through the flow channel 12112, thereby controlling the temperature of the battery cell 20; while the second sub-wall 1212 can protect the first sub-wall 1211, which is beneficial to improving the reliability of the battery device 100.

[0262] See Figures 9-11 In some embodiments, the box body 14 includes a first box body 12 and a second box body 13. The first box body 12 has a first wall 121 and a first side wall 122 surrounding the first wall 121. The first side wall 122 surrounds a cavity opening 123b, and the second box body 13 covers the cavity opening 123b.

[0263] The first box 12 may be a hollow structure with an opening at one end. The opening of the first box 12 forms a cavity opening 123b. The wall of the first box 12 opposite to the cavity opening 123b is the first wall 121, and the annular sidewall surrounding the first wall 121 is the first sidewall 122. The first wall 121 and the first sidewall 122 together form the inner cavity of the first box 12.

[0264] The second housing 13 may be a plate-like structure, covering the cavity opening 123b of the first housing 12 to enclose and form an installation space 101.

[0265] The second housing 13 can also be a hollow structure with an opening at one end. The first housing 12 and the second housing 13 are connected at their open sides to form an installation space 101. The wall of the second housing 13 opposite to the first housing 12 is the second wall 131. The annular sidewall surrounding the second wall 131 is the second sidewall 132. The second sidewall 132 and the second wall 131 together form the internal space of the second housing 13. The end of the first sidewall 122 facing away from the first wall 121 is connected to the end of the second sidewall 132 facing away from the second wall 131, thereby realizing the connection between the first housing 12 and the second housing 13.

[0266] In some examples, the first housing 12 may be referred to as the lower housing, and the second housing 13 may be referred to as the upper housing or the top cover.

[0267] By adopting the technical solution of this embodiment, the main body 14 adopts the structure of the first box 12 and the second box 13, which facilitates the assembly of the box 10 and the battery cell 20. In addition, the first sleeve 31 is provided with the first protrusion 311, which is also beneficial to the overall manufacturing of the first box 12 and simplifies the manufacturing process of the first box 12.

[0268] See Figures 9-11 In some embodiments, the first housing 12 includes a first plate 123 and a second plate 124. The recess of the first plate 123 forms a mounting cavity 123a and a cavity opening 123b communicating with the mounting cavity 123a. The first plate 123 has a first cavity wall 1231 disposed opposite to the cavity opening 123b. The first cavity wall 1231 forms a second sub-wall 1212. The second plate 124 is located in the mounting cavity 123a and is stacked with the first cavity wall 1231. The second plate 124 forms a first sub-wall 1211.

[0269] The first housing 12 can be a basin-shaped structure integrally formed from the first plate 123. The first housing 12 can be a sheet metal housing. The first plate 123 of the first housing 12 can be stamped to achieve a central recess. The cavity structure formed by the central recess of the first plate 123 is a mounting cavity 123a. The mounting cavity 123a has an open structure. The opening of the mounting cavity 123a is a cavity opening 123b. The first plate 123 also has a first cavity wall 1231 opposite to the cavity opening 123b. The first cavity wall 1231 can be the bottom wall of the mounting cavity 123a. The first cavity wall 1231 can form a second sub-wall 1212. The circumferential sidewall of the mounting cavity 123a is a second cavity wall 1232. The second cavity wall 1232 surrounds the periphery of the first cavity wall 1231. One end of the second cavity wall 1232 is connected to the first cavity wall 1232, and the opening at the other end forms the cavity opening 123b. The second cavity wall 1232 can form the first side wall 122.

[0270] The second plate 124 is a plate-like structure, located within the mounting cavity 123a and stacked on top of the first cavity wall 1231. The second plate 124 and the first cavity wall 1231 can be fixed together by welding, bonding, or bolting. The second plate 124 forms the first sub-wall 1211, and the second plate 124 can be a single-layer or multi-layer structure.

[0271] For example, the second plate 124 may be a heat exchange plate.

[0272] The second box 13 is installed over the cavity opening 123b of the first plate 123. The second box 13 can be fixedly connected to the edge of the opening of the first plate 123 by welding, bolting or other means, so that the second box 13 and the first box 12 enclose an installation space 101.

[0273] The first housing 12 is a sheet metal housing. The first plate 123 and the second plate 124 of the sheet metal housing are in a fixed connection state before being assembled with the sleeve assembly 30. Therefore, by using the sleeve assembly 30 of this application embodiment, the assembly of the first housing 12 and the sleeve assembly 30 can be realized without disassembling the first plate 123 and the second plate 124. This facilitates the overall processing and manufacturing of the first housing 12, simplifies the manufacturing process of the first housing 12, and reduces the manufacturing cost of the first housing 12.

[0274] See Figures 9-11 In some embodiments, the surface of the first wall 121 facing away from the mounting space 101 is provided with an anti-collision elastic coating 125, and the anti-collision elastic coating 125 is provided with a fifth through hole 1251 for avoiding the first protrusion 311.

[0275] The anti-collision elastic coating 125 can be called a stone-impact protection coating, chassis armor, etc. The anti-collision elastic coating 125 refers to an elastic protective material sprayed onto the outer side of the first wall 121. The anti-collision elastic coating 125 can be an asphalt-based coating, a polyvinyl chloride coating, a polyurethane elastomer coating, a polyurea coating, etc.

[0276] A fifth through hole 1251 is provided on the anti-collision elastic coating 125 at the position corresponding to the second through hole 12121. The second through hole 12121 and the fifth through hole 1251 can be arranged approximately coaxially, so that the first sleeve 31 passes through the fifth through hole 1251 into the second through hole 12121. The position of the fifth through hole 1251 corresponds one-to-one with the position of the first protrusion 311. The diameter of the fifth through hole 1251 is larger than the outer diameter of the first protrusion 311, so that the first protrusion 311 can pass smoothly through the fifth through hole 1251 and abut against the second sub-wall 1212. The first protrusion 311 can be partially located in the fifth through hole 1251, or it can be entirely located in the fifth through hole 1251.

[0277] By adopting the technical solution of this embodiment, the anti-collision elastic coating 125 can resist the impact, scratching and puncture of road gravel and hard objects during the driving of the vehicle 1000, while also having the functions of rust prevention, corrosion prevention and sound insulation and noise reduction, reducing the risk of damage to the battery device 100; in addition, the fifth through hole 1251 can avoid the first protrusion 311, so that the first protrusion 311 can directly abut against the second sub-wall 1212, instead of abutting against the anti-collision elastic coating 125. This can reduce the possibility that the first protrusion 311 will not be able to keep the seal tight and leak air due to the anti-collision elastic coating 125 slowly collapsing and deforming poorly due to long-term compression, which is beneficial to improving the sealing performance of the battery device 100.

[0278] See Figures 2-11 In some embodiments, the battery device 100 includes a housing 10, battery cells 20, and a sleeve assembly 30. The housing 10 includes a beam 11, a first housing 12, and a second housing 13. The first housing 12 includes a first plate 123, a second plate 124, and an anti-collision elastic coating 125. The first housing 12 has a first wall 121, which includes a first sub-wall 1211 and a second sub-wall 1212 stacked together. The recess of the first plate 123 forms a mounting cavity 123a, which has a cavity opening 123b. Plate 123 has a first cavity wall 1231 disposed opposite to cavity opening 123b, the first cavity wall 1231 forms a second sub-wall 1212, the second plate 124 is located in mounting cavity 123a and is stacked with the first cavity wall 1231, the second plate 124 forms a first sub-wall 1211, the second housing 13 is covered on cavity opening 123b and surrounds the first housing 12 to form mounting space 101, the second housing 13 has a second wall 131 disposed opposite to the first wall 121, the beam 11 and battery cell 20 are located in mounting space 101. The anti-collision elastic coating 125 is located on the side of the first cavity wall 1231 facing away from the mounting cavity 123a and is stacked with the first cavity wall 1231. The first sub-wall 1211 is provided with a first through hole 12111, the second sub-wall 1212 is provided with a second through hole 12121, the beam 11 is provided with a third through hole 116, the second wall 131 is provided with a fourth through hole 1311, and the anti-collision elastic coating 125 is provided with a fifth through hole 1251.

[0279] The sleeve assembly 30 includes a first sleeve 31, a second sleeve 32, and a third sleeve 33. The first sleeve 31 includes a first sleeve section 312 and a second sleeve section 313. The first sleeve section 312 passes through a first through hole 12111, a second through hole 12121, a third through hole 116, and a fifth through hole 1251. The second sleeve section 313 is located within the third through hole 116. The first sleeve section 312 has a first protrusion 311. The first protrusion 311 is located within the third through hole 116. The second sub-wall 1212 faces away from the mounting space 101 and abuts against the second plate 124. A portion of the first protrusion 311 is located within the fifth through hole 1251. The second sleeve 32 is located within the mounting space 101 and includes a third sleeve section 321 and a fourth sleeve section 322. The fourth sleeve section 322 is located within the third through hole 116. The second sleeve section 313 is inserted into the fourth sleeve section 322 and threadedly connected to it. The outer circumferential surface of the third sleeve section 321 is provided with a second protrusion 3211. The second protrusion 3211 is located between the beam 11 and the second wall 131 and abuts against the beam 11. The end face of the third sleeve section 321 facing away from the second protrusion 3211 abuts against the second wall 131. The third sleeve 33 is inserted into the fourth through hole 1311 and into the third sleeve section 321 and threadedly connected to the second sleeve 32. The third sleeve 33 is provided with a third protrusion 331, which is located on the side of the second wall 131 facing away from the installation space 101. The third protrusion 331 and the third sleeve section 321 clamp the second wall 131.

[0280] Secondly, an electrical device is provided, including the battery device 100 described above.

[0281] By adopting the technical solution of this embodiment, the manufacturing process of the housing 10 of the battery device 100 is simple, which helps to reduce the manufacturing cost of the battery device 100 and the manufacturing cost of the power-consuming device.

Claims

1. A battery device, characterized in that, include: Battery cell; The enclosure includes a main body and a beam connected together. The main body has an installation space and a first wall and a second wall disposed opposite to each other along a first direction. The battery cell is located in the installation space, and the beam is located in the installation space and between the first wall and the second wall. The first wall includes a first sub-wall and a second sub-wall stacked together. The first sub-wall is located on the side of the beam facing the second sub-wall. The first sub-wall has a first through hole, the second sub-wall has a second through hole, and the beam has a third through hole. The first through hole, the second through hole, and the third through hole are connected along the first direction. A sleeve assembly includes a first sleeve and a second sleeve. A portion of the first sleeve passes through the first through hole, the second through hole, and the third through hole. One end of the first sleeve is connected to the second wall, and the other end of the first sleeve has a first protrusion located on the side of the second sub-wall facing away from the installation space and abutting against the second sub-wall. One end of the second sleeve is connected to the first sleeve, and the other end of the second sleeve is connected to the second wall. At least a portion of the second sleeve is located between the second wall and the beam. The outer peripheral surface of the portion of the second sleeve located between the beam and the second wall has a locking structure for engaging with an external tool.

2. The battery device according to claim 1, characterized in that: The second sub-wall has a receiving groove located on the side of the second sub-wall facing away from the mounting space, and at least a portion of the first protrusion is accommodated within the receiving groove.

3. The battery device according to claim 1, characterized in that: A first sealing element is held between the first protrusion and the second sub-wall, and the first sealing element is arranged around the first sleeve.

4. The battery device according to any one of claims 1 to 3, characterized in that: The first sleeve includes a first sleeve section and a second sleeve section connected to each other. The first sleeve section is provided with the first protrusion. A portion of the first sleeve section passes through the first through hole, the second through hole and the third through hole. At least a portion of the second sleeve section passes through the third through hole and is connected to the second wall. The diameter of the first sleeve section is larger than the diameter of the second sleeve section.

5. The battery device according to any one of claims 1 to 3, characterized in that: The second sleeve abuts against the end face of the beam facing the second wall.

6. The battery device according to any one of claims 1 to 3, characterized in that: The first sleeve is inserted into the second sleeve, and the second sleeve is inserted into the third through hole.

7. The battery device according to claim 6, characterized in that: The beam has a hollow cavity, and a partition is provided inside the hollow cavity. The partition divides the hollow cavity into a first sub-cavity and a second sub-cavity distributed along the first direction. The third through hole penetrates the partition.

8. The battery device according to claim 7, characterized in that: The third through hole penetrates the partition plate to form a first sub-hole, and the second sleeve is inserted into the first sub-hole.

9. The battery device according to claim 6, characterized in that: The first sleeve and the second sleeve are threadedly connected.

10. The battery device according to claim 9, characterized in that: At least a portion of the threaded connection area between the first sleeve and the second sleeve is located within the third through hole.

11. The battery device according to claim 9, characterized in that: The first sleeve is provided with a limiting structure for restricting the first sleeve from rotating within the first through hole and / or the second through hole.

12. The battery device according to any one of claims 1 to 3, characterized in that: The second wall is provided with a fourth through hole, and the sleeve assembly further includes a third sleeve connected to the second sleeve. At least a portion of the third sleeve is located on the side of the second wall facing away from the mounting space. The second sleeve and / or the third sleeve passes through the fourth through hole. At least a portion of the third sleeve, a portion of the second wall, and at least a portion of the second sleeve are stacked along the first direction, such that the third sleeve and the second sleeve together clamp the second wall.

13. The battery device according to claim 12, characterized in that: One of the third sleeve and the second sleeve is threaded through the other.

14. The battery device according to claim 12, characterized in that: A second sealing element is held between the second wall and the second sleeve, and the second sealing element is arranged around the second sleeve.

15. The battery device according to any one of claims 1 to 3, characterized in that: The first sub-wall and / or the second sub-wall are multi-layered structures.

16. The battery device according to any one of claims 1 to 3, characterized in that: The first sub-wall has flow channels for the flow of heat exchange medium.

17. The battery device according to any one of claims 1 to 3, characterized in that: The main body of the box includes a first box and a second box. The first box has a first wall and a first side wall surrounding the first wall. The first side wall forms a cavity opening, and the second box covers the cavity opening.

18. The battery device according to claim 17, characterized in that: The first housing includes a first plate and a second plate. The recess of the first plate forms a mounting cavity and a cavity opening communicating with the mounting cavity. The first plate has a first cavity wall disposed opposite to the cavity opening. The first cavity wall forms a second sub-wall. The second plate is located in the mounting cavity and is stacked with the first cavity wall. The second plate forms the first sub-wall.

19. The battery device according to claim 18, characterized in that: The surface of the first wall facing away from the installation space is provided with an anti-collision elastic coating, and the anti-collision elastic coating is provided with a fifth through hole for avoiding the first protrusion.

20. An electrical device, characterized in that: The battery device includes any one of claims 1 to 19.

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