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 has a box main body and a beam body. The box main body comprises a mounting space and oppositely arranged first and second walls. The box body is provided with a first through hole. The beam body has a first end face. The first through hole penetrates the first end face to form a first end face hole. The sleeve assembly comprises a first sleeve and a second sleeve arranged in the first through hole. The first sleeve is closer to the first wall than the second sleeve. One of the first sleeve and the second sleeve is arranged in the other. The outer sleeve is arranged in the first end face hole. The outer diameter of the outer sleeve at the first end face hole is greater than the outer diameter of the inner sleeve arranged in the inner part of the outer sleeve. The shear resistance of the sleeve assembly can be improved. The second sleeve is provided with a clamping structure for clamping with an external tool, which facilitates the connection of the first sleeve and the second sleeve.

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, a sleeve assembly, consisting of bolts, screws, and other connecting components, is used to connect the battery device to the power-consuming device via a sleeve assembly passing through the battery housing. This sleeve assembly, located in the middle of the battery device, connects to the power-consuming device, reducing deformation during side impacts. The sleeve assembly is inserted into the beam of the housing to save space. However, during the side expansion of the battery device, the sleeve assembly experiences significant shear forces at the end face of the beam. Therefore, the sleeve assembly needs to have good shear resistance at the beam end face to reduce the possibility of it breaking. Thus, improving the shear resistance of the sleeve assembly at the beam end face is an important research area 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 improve the shear resistance of the sleeve assembly.

[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 has a main body and a beam, the main body including an installation space and a first wall and a second wall disposed opposite to each other along a first direction, the battery cell being located within the installation space; the beam being located within the installation space and between the first wall and the second wall; the housing has a receiving hole extending through the first wall, the beam, and the second wall along the first direction, the receiving hole extending through the beam to form a first through hole, the beam having a first end face opposite to the second wall along the first direction, the first through hole extending through the first end face to form a first end face; at least a portion of the sleeve assembly is located within the housing. The receiving hole and sleeve assembly includes a first sleeve and a second sleeve connected along a first direction and passing through a first through hole. The first sleeve is closer to the first wall than the second sleeve. One of the first sleeve and the second sleeve passes through the other. The one located on the outside is the outer sleeve, and the one located on the inside is the inner sleeve. The outer sleeve passes through the first end face and the outer diameter of the outer sleeve at the first end face is larger than the outer diameter of the portion of the inner sleeve that passes through the outer sleeve. A portion of the second sleeve is located between the first end face and the second wall. The outer peripheral surface of the portion of the second sleeve located between the first end face and the second wall is provided with a locking structure for engaging with an external tool.

[0008] By adopting the technical solution of this embodiment, the outer sleeve passes through the first end hole. The outer diameter of the outer sleeve at the first end hole is larger than the outer diameter of the portion of the inner sleeve passing through the outer sleeve. This allows the larger outer diameter portion of the sleeve assembly to pass through the first end hole, resulting in a larger outer diameter at the first end hole. This provides the sleeve assembly with better shear resistance, improving its structural strength and enhancing the shear and lateral deformation resistance of the beam and battery device. Furthermore, the first and second sleeves pass through the first through hole in the beam, facilitating the connection between the battery device and the power supply device. This improves the reliability of the connection, enhances the battery device's deformation resistance, saves space within the housing, and increases the volumetric energy density of the battery device. Additionally, the outer circumferential surface of the portion of the second sleeve located between the second wall and the first end face has a locking structure. This structure can engage with an external tool, fixing the tool to the second sleeve. This allows 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 receiving hole penetrates the first wall to form a second through hole, the first sleeve passes through the second through hole, the second sleeve passes through the first sleeve, the second sleeve passes through the first end hole, and a portion of the second sleeve, the beam, a portion of the first wall, and a portion of the first sleeve are stacked along a first direction, such that the second sleeve and the first sleeve clamp the first wall and the beam.

[0010] By adopting the technical solution of this embodiment, the first sleeve and the second sleeve are used to clamp the beam and the second wall, so that the first sleeve and the second sleeve can be fixed to the first wall and the beam. In this way, during assembly, the first sleeve and the second sleeve can be fixed to the first wall and the beam first, then the battery cell can be installed, and finally the second wall can be installed. In this process, before the battery cell is installed, the first sleeve can be fixed to the first wall and the beam using the second sleeve. Only the first wall and the beam need to be lifted to realize the installation of the first sleeve and the second sleeve, which reduces the assembly difficulty of the battery device and helps to improve the efficiency of the battery device.

[0011] In some embodiments, the outer peripheral surface of the second sleeve is provided with a first stepped surface, which abuts against the end face of the beam facing the second wall.

[0012] By adopting the technical solution of this embodiment, the first step surface abuts against the beam body to clamp the beam body and the second wall; in addition, the second sleeve can form the first step surface by changing its outer diameter, which helps to simplify the structure of the second sleeve and facilitates assembly.

[0013] In some embodiments, the receiving hole penetrates the first wall to form a second through hole, a portion of the first sleeve passes through the second through hole, and the outer peripheral surface of the first sleeve is provided with a first protrusion, the first protrusion being located on the side of the first wall facing away from the installation space and abutting against the first wall.

[0014] By employing the technical solution of this embodiment, the first protrusion abuts against the first wall, facilitating the clamping of the beam and the first wall between the first and second sleeves, thus aiding in the assembly of the battery device. Furthermore, by utilizing the first protrusion to abut against the first wall, an additional sleeve is not required on the outside of the first wall, simplifying the sleeve assembly structure, saving space, reducing the assembly complexity of the sleeve assembly with the first wall, and improving the operational stability of the battery device. The first protrusion of the first sleeve is located on the outside of the housing, facilitating direct disassembly of the first sleeve and improving the convenience of maintenance and replacement of the sleeve assembly.

[0015] In some embodiments, the first wall has a receiving groove located on the side of the first wall opposite to the mounting space, and at least a portion of the first protrusion is received within the receiving groove.

[0016] 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 first wall, thus protecting the first sleeve and improving the reliability of the battery device.

[0017] In some embodiments, a first seal is held between the first wall and the first protrusion, and the first seal is disposed around the first sleeve.

[0018] By adopting the technical solution of this embodiment, the first sealing element is used to seal between the first wall and the first protrusion, which helps to improve the reliability of the battery device seal.

[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 first 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 first through hole penetrates the partition portion to form a first sub-hole, and the second sleeve passes through the first sub-hole.

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

[0023] In some embodiments, the receiving hole penetrates the first wall to form a second through hole, and the first sleeve includes a first sleeve section and a second sleeve section connected to each other, with one of the second sleeve section and the second sleeve passing through the other; at least a portion of the first sleeve section passes through the second through hole and the first through hole, and the outer diameter of the first sleeve section is larger than the outer diameter of the second sleeve section.

[0024] The first sleeve is a stepped sleeve, which passes through the second through hole and the first through hole. The second sleeve section may be partially located in the first through hole or entirely located in the first through hole. The first sleeve section and the second sleeve section are roughly coaxially arranged, and the outer diameter of the first sleeve section is larger than the outer diameter of the second sleeve section, i.e., D1 > D2.

[0025] By adopting the technical solution of this embodiment, the outer diameter of the first sleeve section is larger than the outer diameter of the second sleeve section, so that the first sleeve has a larger outer diameter at the interface between the first wall and the beam, which is beneficial to improve the shear resistance of the first sleeve and reduce the possibility of the first sleeve being sheared.

[0026] In some embodiments, the first sleeve and the second sleeve are threaded together.

[0027] By adopting the technical solution of this embodiment, the first sleeve and the second sleeve are connected by threads, which is simple and facilitates the assembly of the first sleeve and the second sleeve. In addition, the second sleeve and the first sleeve clamp the beam 11 and the first wall, which can provide preload to the first sleeve and the second sleeve, thereby reducing the possibility of unwinding between the first sleeve and the second sleeve and improving the reliability of the sleeve assembly.

[0028] In some embodiments, at least a portion of the threaded connection area between the first sleeve and the second sleeve is located in the first through hole.

[0029] By adopting the technical solution of this embodiment, the threaded connection area of ​​the first sleeve and the second sleeve is located in the first through hole, which can play a better supporting role for the beam and help improve the deformation resistance of the beam and the deformation resistance of the battery device.

[0030] In some embodiments, the receiving hole penetrates the second wall to form a third 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 third through hole. 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.

[0031] 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.

[0032] In some embodiments, one of the third sleeve and the second sleeve passes through the other and is threaded together.

[0033] 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.

[0034] In some embodiments, a second seal is provided between the second sleeve and the second wall, and the second seal is disposed around the second sleeve.

[0035] 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.

[0036] In some embodiments, the first wall is provided with a flow channel for the flow of heat exchange medium.

[0037] By adopting the technical solution of this embodiment, the first wall can exchange heat with the battery cell through the flow channel, thereby controlling the temperature of the battery cell.

[0038] In some embodiments, the box body 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. The second box covers the cavity opening, so that the first box and the second box surround an installation space.

[0039] By adopting the technical solution of this embodiment, the first box is a sheet metal box, which is beneficial to improve the deformation resistance of the first box, thereby improving the side impact resistance of the box.

[0040] In some embodiments, the surface of the first wall facing away from the mounting space is provided with an anti-collision elastic coating, the anti-collision elastic coating having a fourth through hole for avoiding the sleeve assembly.

[0041] By adopting the technical solution of this embodiment, the anti-collision elastic coating can resist the impact, scratching and puncture 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 fourth through hole can avoid the sleeve assembly, so that the sleeve assembly can directly abut against the first 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 sleeve assembly, causing poor sealing and air leakage, which is beneficial to improving the sealing performance of the battery device.

[0042] Secondly, an electrical device is provided, including the aforementioned battery device.

[0043] By adopting the technical solution of this embodiment, the battery device has good structural reliability, which is beneficial to improving the reliability of the electrical device.

[0044] 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

[0045] 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.

[0046] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0047] Figure 2 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application.

[0048] 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.

[0049] Figure 4 For along Figure 3 Sectional view along line AA in the middle.

[0050] Figure 5 This is a structural schematic diagram of a first housing and sleeve assembly provided for some embodiments of this application.

[0051] Figure 6 for Figure 5 A magnified view of a section at point C.

[0052] Figure 7 for Figure 3 The diagram shows the structure of the sleeve assembly.

[0053] Figure 8 for Figure 7 An exploded view of the sleeve assembly shown.

[0054] Figure 9 For along Figure 3 Sectional view along the middle BB line.

[0055] Figure 10 for Figure 9 A magnified view of a section at point D.

[0056] Figure 11 for Figure 10 A magnified view of a section at point E in the middle.

[0057] The following are the labeling elements in the figure:

[0058] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 101, Installation Space; 102, Receiving Slot; 103, Receiving Hole; 11, Beam; 1101, First End Face; 1102, Second End Face; 1103, First End Hole; 1104, Second End Hole; 111, First Side Wall; 112, Second Side Wall; 113, Third Side Wall; 114, Fourth Side Wall; 115, Partition. 116. First through hole; 1161. Second sub-hole; 1162. Third sub-hole; 1163. First sub-hole; 117. Hollow cavity; 1171. First sub-cavity; 1172. Second sub-cavity; 12. First housing; 121. First wall; 1210. Second through hole; 1211. First sub-wall; 12111. First hole section; 12112. Flow channel; 1212. Second sub-wall; 12121. Second hole section; 122. First sidewall; 123. First plate; 123a, mounting cavity; 123b, cavity opening; 1231, first cavity wall; 1232, second cavity wall; 124, second plate; 125, anti-collision elastic coating; 1251, fourth through hole; 13, second housing; 131, second wall; 1311, third through hole; 132, second side wall; 14, housing body; 20, battery cell; 30, sleeve assembly; 31, first sleeve; 311, first protrusion; 3111, first receiving part 312. Groove; 3121. First sleeve section; 3122. Limiting structure; 3122. Third step surface; 313. Second sleeve section; 32. Second sleeve; 321. Third sleeve section; 322. Fourth sleeve section; 3211. Second protrusion; 3212. First step 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

[0059] 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.

[0060] 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.

[0061] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0067] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0068] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0069] 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).

[0070] 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.

[0071] The battery assembly comprises individual battery cells, a housing, and a sleeve assembly. The housing includes a main body and a beam. The main body includes an installation space and a first wall and a second wall positioned opposite each other. The battery cells and the beam are located within the installation space, with the beam positioned between the first and second walls. The sleeve assembly's two ends pass through and connect to the first and second walls respectively, thus connecting the sleeve assembly to the housing. The sleeve assembly can directly penetrate the entire battery assembly, allowing bolts, screws, connecting rods, and other connecting components to pass directly through the inner hole of the sleeve assembly and be fixed to other structures of the electrical device, thereby securing the battery assembly within the electrical device.

[0072] The battery pack has a sleeve assembly in the middle. The connection between the battery pack and the electrical device is improved by using the sleeve assembly in the middle to connect the battery pack and the electrical device, and the deformation caused by the side collision of the battery pack is also reduced. The sleeve assembly in the middle passes through the beam of the box body, which saves space and also increases the connection reliability of the battery pack in the electrical device.

[0073] When the side of the battery device is impacted, the side impact force will laterally compress the second wall of the housing, causing the second wall to deform. The second wall pushes the end of the sleeve assembly near the second wall to move laterally, so that the sleeve assembly needs to withstand a large shear force at the end face of the beam facing the second wall. The greater the shear force, the easier it is for the sleeve assembly to be sheared. Therefore, how to reduce the possibility of the sleeve assembly being sheared during the side impact of the battery device is an important research topic in battery technology.

[0074] Based on this, this application provides a battery device, which includes a battery cell, a housing, and a sleeve assembly. The housing has a main body and a beam. The main body includes 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 within the installation space. The beam is located within the installation space and between the first wall and the second wall. The housing has a receiving hole that penetrates the first wall, the beam, and the second wall along the first direction. The receiving hole penetrates the beam to form a first through hole. The beam has a first end face that is opposite to the second wall along the first direction. The first through hole penetrates the first end face to form a first end face. At least a portion of the sleeve assembly is located... Regarding the receiving hole, the sleeve assembly includes a first sleeve and a second sleeve connected along a first direction and passing through the first through hole. The first sleeve is closer to the first wall than the second sleeve. One of the first sleeve and the second sleeve passes through the other, wherein the one located on the outside is the outer sleeve and the one located on the inside is the inner sleeve. The outer sleeve passes through the first end face and the outer diameter of the outer sleeve at the first end face is larger than the outer diameter of the portion of the inner sleeve passing through the outer sleeve. A portion of the second sleeve is located between the first end face and the second wall. The outer peripheral surface of the portion of the second sleeve located between the first end face and the second wall is provided with a locking structure for engaging with an external tool.

[0075] In this embodiment of the battery device, the outer sleeve passes through the first end hole. The outer diameter of the outer sleeve at the first end hole is larger than the outer diameter of the portion of the inner sleeve passing through the outer sleeve. This results in the larger outer diameter portion of the sleeve assembly passing through the first end hole, giving the sleeve assembly a larger outer diameter at the first end hole. This improves the shear resistance of the sleeve assembly, enhancing its structural strength and improving the shear and lateral deformation resistance of the beam and the battery device. Furthermore, the first and second sleeves pass through the first through hole in the beam, facilitating the connection between the middle of the battery device and the power-consuming device. This improves the reliability of the connection, enhances the deformation resistance of the battery device, saves space within the housing, and increases the volumetric energy density of the battery device. Additionally, the outer circumferential surface of the portion of the second sleeve located between the second wall and the first end face has a locking structure. This structure can engage with an external tool, fixing the external tool to the second sleeve. This allows the external tool to move or rotate the second sleeve to connect it to the first sleeve, facilitating the assembly of the first and second sleeves.

[0076] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] Please refer to Figure 1 Vehicle 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.

[0081] 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.

[0082] 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.

[0083] See below Figures 2-11 The battery device 100 of the present application embodiment will be described. In the embodiment shown in the drawings, the length direction, width direction and height direction of the battery device 100 are 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 are parallel to the Z direction.

[0084] 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.

[0085] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.).

[0099] 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 Co1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (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.

[0100] 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.

[0101] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0102] 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.).

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0108] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0109] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] Liquid electrolytes include electrolyte salts and solvents.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0119] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0120] 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.

[0121] 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.

[0122] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0123] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0124] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0125] In some implementations, the electrode assembly is a stacked structure.

[0126] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0127] 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.

[0128] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0129] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0130] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0131] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0132] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0140] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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 housing body 14 and a beam 11. The housing body 14 includes 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 within the installation space 101. The beam 11 is located within the installation space 101 and between the first wall 121 and the second wall 131. The housing 10 has a receiving hole 103 extending along the first direction through the first wall 121, the beam 11, and the second wall 131. The receiving hole 103 extends through the beam 11 to form a first through hole 116. The beam 11 has a first end face 1101 opposite to the second wall 131 along the first direction. The first through hole 116 extends through the first end face 1101 to form the first end face 1103. The sleeve assembly... At least a portion of the assembly 30 is located in the receiving hole 103. The sleeve assembly 30 includes a first sleeve 31 and a second sleeve 32 connected along a first direction and passing through a first through hole 116. The first sleeve 31 is closer to the first wall 121 than the second sleeve 32. One of the first sleeve 31 and the second sleeve 32 passes through the other. The one located on the outside is the outer sleeve, and the one located on the inside is the inner sleeve. The outer sleeve passes through the first end face 1103, and the outer diameter of the outer sleeve at the first end face 1103 is larger than the outer diameter of the portion of the inner sleeve that passes through the outer sleeve. A portion of the second sleeve 32 is located between the first end face 1101 and the second wall 131. The outer peripheral surface of the portion of the second sleeve 32 located between the first end face 1101 and the second wall 131 is provided with an engagement structure 3213 for engaging with an external tool.

[0145] 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.

[0146] 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.

[0147] In some examples, the first housing 12 is a hollow structure with one end open, and 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] In some examples, the first box 12 is a plate-like structure, which is the first wall 121, and the second box 13 is the wall opposite to the first wall 121, which is the second wall 131.

[0152] 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.

[0153] 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.

[0154] In some examples, the beam 11 can divide the installation space 101 into two spaces, both of which can house the battery cells 20. Alternatively, one space can house the battery cells 20, while the other space can house electrical components electrically connected to the battery cells 20, such as a high-voltage box. 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 housing 13 to improve the structural reliability of the battery device 100.

[0155] In some examples, the housing 10 is provided with a receiving hole 103. The receiving hole 103 may be a through hole through which the sleeve assembly 30 passes. The sleeve assembly 30 may be a hollow sleeve component. The sleeve assembly 30 passes through the receiving hole 103, allowing the connecting component to pass through the inner hole of the sleeve assembly 30, thereby penetrating the battery device 100 and fixing the battery device 100 inside the electrical device. The connecting component may be a screw, bolt, connecting rod, connecting sleeve, or other components.

[0156] The first through hole 116 can penetrate the beam 11 along the first direction to facilitate the insertion of the first sleeve 31 and the second sleeve 32. The through hole formed by the receiving hole 103 penetrating the beam 11 can be the first through hole 116. The end face of the beam 11 opposite to the second wall 131 is the first end face 1101. The through hole 116 penetrating the first end face 1101 forms the first end face 1103. The end face of the beam 11 opposite to the first wall 121 is the second end face 1102. The first through hole 116 penetrating the first end face 1101 forms the second end face 1104. The first sleeve 31 and the second sleeve 32 can be partially inserted into the first through hole 116. The second sleeve 32 is inserted into the first end face 1103, and the first sleeve 31 is inserted into the second end face 1104.

[0157] The sleeve assembly 30 includes a first sleeve 31 and a second sleeve 32. The first sleeve 31 and the second sleeve 32 are hollow inside, and the middle space forms an inner hole. The first sleeve 31 is closer to the first wall 121 than the second sleeve 32. The first sleeve 31 and the second sleeve 32 are sleeved together along the first direction and are arranged approximately coaxially, so that the connecting parts can be inserted into the inner holes of the first sleeve 31 and the second sleeve 32, and the battery device 100 can be fixed in the power device.

[0158] In some examples, the first sleeve 31 is inserted inside the second sleeve 32, which may be referred to as the outer sleeve and the first sleeve 31 as the inner sleeve.

[0159] In some examples, the second sleeve 32 is inserted inside the first sleeve 31, which may be referred to as the outer sleeve and the second sleeve 32 as the inner sleeve.

[0160] The outer sleeve passes through the first end hole 1103, and the outer diameter of the outer sleeve at the first end hole 1103 is D1. The outer diameter of the part of the inner sleeve that passes through the outer sleeve is D2.

[0161] In some examples, the outer diameter of the outer sleeve along its own axial direction remains constant, and D1 takes the outer diameter at any position of the outer sleeve.

[0162] In some examples, the outer diameter of the outer sleeve changes along its own axial direction, and D1 is the outer diameter of the outer sleeve at the first end hole 1103.

[0163] In some examples, the outer diameter of the inner sleeve remains constant along its own axis, and D2 is the outer diameter at any position of the inner sleeve.

[0164] In some examples, the outer diameter of the inner sleeve changes along its own axial direction, and D2 is the outer diameter of the portion of the inner sleeve that passes through the outer sleeve.

[0165] A portion of the second sleeve 32 is located between the first end face 1101 and the second wall 131. The outer peripheral surface of this portion of the second sleeve 32 is provided with a locking structure 3213 for engaging with an external tool. 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 first end face 1101 and the second wall 131. The outer peripheral surface of the portion of the second sleeve 32 exposed above the first through hole 116 is provided with the locking structure 3213, which can be a flat surface, a groove, or a protrusion. The external tool can be a wrench, etc.

[0166] 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.

[0167] By adopting the technical solution of this embodiment, the outer sleeve passes through the first end hole 1103. The outer diameter of the outer sleeve at the first end hole 1103 is larger than the outer diameter of the portion of the inner sleeve passing through the outer sleeve. This allows the larger outer diameter portion of the sleeve assembly 30 to pass through the first end hole 1103, resulting in a larger outer diameter of the sleeve assembly 30 at the first end hole 1103. This provides the sleeve assembly 30 with better shear resistance, improving its structural strength and enhancing the shear and lateral deformation resistance of the beam 11 and the battery device 100. Furthermore, the first sleeve 31 and the second sleeve 32 pass through the first through hole 116 of the beam 11, facilitating the connection between the middle of the battery device 100 and the power-consuming device. This improves the reliability of the connection between the battery device 100 and the power-consuming device, enhances the deformation resistance of the battery device 100, saves space within the housing 10, and increases the volumetric energy density of the battery device 100. In addition, the outer peripheral surface of the portion of the second sleeve 32 located between the second wall 131 and the first end face 1101 is provided with a locking structure 3213. The locking structure 3213 can be engaged with an external tool to 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.

[0168] In some embodiments, the sleeve assembly 30 passes through the beam 11. When the side of the housing 10 is subjected to static or dynamic lateral compression, the sleeve assembly 30 passes through the receiving hole 103. The sleeve assembly 30 can support the beam 11. The sleeve assembly 30 can also connect the first wall 121, the beam 11 and the second wall 131, thereby reducing the deformation of the second wall 131 and thus reducing the deformation of the battery device 100. In particular, when the second wall 131 serves as the floor of the vehicle 1000 or is fixedly connected to the floor of the vehicle 1000, it can reduce the possibility of deformation or wrinkling of the floor of the vehicle 1000.

[0169] In some embodiments, the receiving hole 103 penetrates the first wall 121 to form a second through hole 1210, and the receiving hole 103 penetrates the second wall 131 to form a third through hole 1311. The second through hole 1210, the first through hole 116, and the third through hole 1311 are arranged sequentially along a first direction. The second through hole 1210 communicates with the first sleeve 31, and the third through hole 1311 communicates with the first sleeve 31. For example, the receiving hole 103 penetrates the first wall 121 to form a second through hole 1210, and the receiving hole 103 penetrates the third wall to form a third through hole 1311.

[0170] In some examples, the first sleeve 31 can be directly inserted into the second through hole 1210, thereby enabling the first sleeve 31 to communicate with the second through hole 1210. Alternatively, the first sleeve 31 can be connected to the second through hole 1210 after being transferred through other sleeve components.

[0171] In some examples, the second sleeve 32 can be directly inserted into the third through hole 1311, thereby enabling the second sleeve 32 to communicate with the third through hole 1311. Alternatively, the second sleeve 32 can be connected to the third through hole 1311 after being transferred through other sleeve components (e.g., the third sleeve 33).

[0172] During the process of fixing the battery device 100 to the electrical device, the second through hole 1210 is connected to the first sleeve 31, and the third through hole 1311 is connected to the first sleeve 31, so that the connecting component can directly pass through the inner hole of the first sleeve 31 and the inner hole of the second sleeve 32 through the battery device 100, and then be fixed to other structures of the electrical device, thereby realizing the fixing of the battery device 100 in the electrical device.

[0173] In some examples, the connecting component may be a double-ended bolt, which passes through the first sleeve 31 and the second sleeve 32. 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 in the electrical device.

[0174] In some embodiments, the receiving hole 103 penetrates the first wall 121 to form a second through hole 1210, the first sleeve 31 passes through the second through hole 1210, the second sleeve 32 passes through the first sleeve 31, and the second sleeve 32 passes through the first end hole 1103. A portion of the second sleeve 32, the beam 11, a portion of the first wall 121, and a portion of the first sleeve 31 are stacked along a first direction, such that the second sleeve 32 and the first sleeve 31 clamp the first wall 121 and the beam 11.

[0175] The second sleeve 32 is the outer sleeve, and the first sleeve 31 is the inner sleeve. The first sleeve 31 is inserted into the inner hole of the second sleeve 32, and the second sleeve 32 is inserted into the first end hole 1103.

[0176] In some examples, a portion of the second sleeve 32 is located inside the first through hole 116, and another portion of the second sleeve 32 is located on the side of the beam 11 facing away from the first wall 121. The first sleeve 31 is inserted into the second through hole 1210 and the first through hole 116 in sequence and passes through the second sleeve 32. The portion of the second sleeve 32 located on the beam 11 and the portion of the first sleeve 31 located on the side of the first wall 121 facing away from the beam 11 can clamp the beam 11 and the second wall 131, thereby fixing the first sleeve 31 and the second sleeve 32 to the beam 11 and the second wall 131.

[0177] During the assembly of some battery devices 100, the first sleeve 31 is inserted into the first through hole 116 and the second through hole 1210, and the second sleeve 32 is inserted into the first sleeve 31. The first sleeve 31 and the second sleeve 32 are not axially fixed to the first wall 121 and the beam 11. If the first sleeve 31 is inserted into the first through hole 116 and the second through hole 1210 before the battery cell 20 is installed into the installation space 101, the first sleeve 31 and the second sleeve 32 are not axially fixed and are easy to come out of the first through hole 116 and the second through hole 1210. Therefore, the battery cell 20 must be installed into the installation space 101 first, and then the box 10 containing the battery cell 20 must be lifted up as a whole. Then the first sleeve 31 is inserted into the first through hole 116 and the second through hole 1210 and then fixed to the second sleeve 32 and the second wall 131. However, the box 10 containing the battery cell 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 and the first sleeve 31 are used to clamp the beam 11 and the second wall 131, so that the first sleeve 31 and the second sleeve 32 can be fixed on 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 on 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 on the first wall 121 and the beam 11 using the second sleeve 32. Only the first wall 121 and the beam 11 need to be lifted to realize the installation of the first sleeve 31 and the second sleeve 32, which reduces the assembly difficulty of the battery device 100 and helps to improve the efficiency of the battery device 100.

[0178] In some embodiments, the first sleeve 31 includes a first sleeve section 312 and a second sleeve section 313, the first sleeve section 312 passing through the second through hole 1210, and the second sleeve section 313 being inserted into the second sleeve 32.

[0179] The outer diameters of the first sleeve section 312 and the second sleeve section 313 may be equal or unequal; the outer diameter of the first sleeve section 312 is D3, the outer diameter of the second sleeve section 313 is D4, the second sleeve section 313 is inserted into the second sleeve 32, and D2 may be D4.

[0180] 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.

[0181] In some examples, the second sleeve 32 is divided into multiple segments along its length, with the segment located inside the first through hole 116 being the fourth sleeve segment 322, and the segment located on the beam 11 facing away from the first wall 121 being the third sleeve segment 321. The outer diameter of the fourth sleeve segment 322 is D5, and D1 is the value of D5.

[0182] The fourth sleeve section 322 is inserted into the first 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 second sleeve 32 is inserted into the beam 11, and the second sleeve 32 can support the beam 11, which helps to improve the deformation resistance of the beam 11 and improve the structural strength of the battery device 100.

[0183] 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.

[0184] Please refer to Figure 4 In some embodiments, the outer peripheral surface of the second sleeve 32 is provided with a first stepped surface 3212, which abuts against the end face of the beam 11 facing the second wall 131.

[0185] A first step surface 3212 is formed between the third sleeve section 321 and the fourth sleeve section 322, and the first step surface 3212 abuts against the surface of the beam 11 facing the second wall 131.

[0186] The first step surface 3212 can refer to the stepped surface formed by the sudden increase or decrease of the outer diameter of the second sleeve 32; the first step surface 3212 is located between the third sleeve section 321 and the fourth sleeve section 322, and the third sleeve section 321 and the fourth sleeve section 322 can also be divided by the first step surface 3212.

[0187] In some examples, the second sleeve 32 may be a stepped sleeve, and the outer diameters of the third sleeve section 321 and the fourth sleeve section 322 are different, with the outer diameter of the third sleeve section 321 being 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 first stepped surface 3212.

[0188] 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 first stepped surface 3212 near the surface of the beam 11.

[0189] In some examples, the second protrusion 3211 can be an annular structure extending around the axis of the second sleeve 32, which helps to increase the contact area between the second protrusion 3211 and the surface of the beam 11, thereby improving the reliability of the connection. Of course, in other examples, the second protrusion 3211 can be an annular array structure extending around the axis of the second sleeve 32, etc.

[0190] The first step surface 3212 can directly abut against the surface of the beam 11, or indirectly abut against the surface through components such as gaskets, washers, and sealing rings.

[0191] The end of the third sleeve section 321 facing away from the beam 11 abuts against the surface of the second wall 131 facing the installation space 101, that is, abuts against the inner surface of the second wall 131.

[0192] In some examples, the second wall 131 and the beam 11 are spaced apart, and the third sleeve section 321 can be completely located within the installation space 101. The end faces of the first step surface 3212 and the third sleeve section 321 abut against the inner surfaces of the beam 11 and the second wall 131, respectively. Alternatively, the third sleeve section 321 passes through the third through hole 1311, and the outer peripheral surface of the third sleeve section 321 forms a second step surface, which abuts against the inner surface of the second wall 131.

[0193] By adopting the technical solution of this embodiment, the first step surface 3212 abuts against the beam 11 to clamp the beam 11 and the second wall 131; in addition, the second sleeve 32 can form the first step surface 3212 by changing the outer diameter, which helps to simplify the structure of the second sleeve 32 and facilitates assembly.

[0194] Please refer to Figures 4-8 In some embodiments, the receiving hole 103 penetrates the first wall 121 to form a second through hole 1210, a portion of the first sleeve 31 passes through the second through hole 1210, and the outer peripheral surface of the first sleeve 31 is provided with a first protrusion 311, which is located on the side of the first wall 121 facing away from the mounting space 101 and abuts against the first wall 121.

[0195] The first sleeve 31 protrudes from the outer surface of the first wall 121. The outer peripheral surface of the portion of the first sleeve 31 located outside the first wall 121 has a protruding structure, which forms the first protruding part 311.

[0196] In some examples, the outer peripheral surface of the first sleeve section 312 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 and abuts against the outer surface of the first wall 121. At the same time, the second sleeve 32 is connected to the second wall 131, which can realize the connection between the sleeve assembly 30 and the housing 10.

[0197] In some examples, the first protrusion 311 can directly abut against the outer surface of the first wall 121, or it can indirectly abut against the outer surface of the first wall 121 through components such as gaskets, washers, and sealing rings.

[0198] 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 first wall 121 and improve 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.

[0199] By adopting the technical solution of this embodiment, the first protrusion 311 abuts against the first wall 121, so that the first sleeve 31 and the second sleeve 32 can clamp the beam 11 and the first wall 121, thereby facilitating the assembly of the battery device 100. Furthermore, by using the first protrusion 311 to abut against the first wall 121, an additional sleeve is not required on the outside of the first wall 121 to abut against it, which simplifies the structure of the sleeve assembly 30, saves space, reduces the assembly complexity of the sleeve assembly 30 and the first wall 121, and improves the operational stability of the battery device 100. The first protrusion 311 of the first sleeve 31 is located on the outside of the housing 10, which facilitates direct disassembly of the first sleeve 31, improving the convenience of maintenance and replacement of the sleeve assembly 30.

[0200] Please refer to Figures 4-8 In some embodiments, the first wall 121 has a receiving groove 102 located on the side of the first wall 121 facing away from the mounting space 101, and at least a portion of the first protrusion 311 is accommodated in the receiving groove 102.

[0201] The receiving groove 102 can refer to the space formed by the groove structure or cavity structure formed on the outer side of the first wall 121. The first protrusion 311 can be partially located in the receiving groove 102 or entirely located in the receiving groove 102.

[0202] In some examples, the space formed by the first wall 121 recessing into the mounting space 101 at the second through hole 1210 is the receiving groove 102. This eliminates the need to remove material from the first wall 121, which helps to improve the structural strength of the first wall 121.

[0203] 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 first wall 121, thus providing protection for the first sleeve 31 and improving the reliability of the battery device 100.

[0204] Please refer to Figures 4-8In some embodiments, a first seal 34 is held between the first wall 121 and the first protrusion 311, and the first seal 34 is disposed around the first sleeve 31.

[0205] The first sealing element 34 can refer to a sealing component sandwiched between the first protrusion 311 and the first wall 121. The first sealing element 34 can be a sealant, a sealing ring, a sealing gasket, etc.

[0206] In some examples, the first protrusion 311 can be an annular structure extending around the axis of the first sleeve 31, and the first seal 34 is a sealing ring. The sealing ring is sleeved on the first sleeve 31 and clamped between the first protrusion 311 and the outer surface of the first wall 121, thereby achieving a seal between the first protrusion 311 and the first wall 121.

[0207] By adopting the technical solution of this embodiment, the first sealing member 34 is used to seal between the first wall 121 and the first protrusion 311, which helps to improve the reliability of the sealing of the battery device 100.

[0208] Reference Figures 4-8 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.

[0209] Please refer to Figure 4 In some embodiments, the beam 11 has a hollow cavity 117, and a partition 115 is provided inside 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 first through hole 116 penetrates the partition 115.

[0210] The beam 11 is a hollow beam, which helps to reduce the weight of the battery device 100. The internal space of the beam 11 forms a hollow cavity 117. A partition 115 is provided in the hollow cavity 117, 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 can be distributed along a first direction. The first through hole 116 penetrates the through hole formed by the partition 115 and forms a 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.

[0211] In some examples, the beam 11 has a first sidewall 111, a second sidewall 112, a third sidewall 113, and a fourth sidewall 114. The first sidewall 111 and the third sidewall 113 are spaced apart along the axial direction of the first sleeve 31. The first sidewall 111 is closer to the first wall 121 than the third sidewall 113. The two ends of the second sidewall 112 are respectively connected to the ends of the first sidewall 111 and the third sidewall 113 on the same side. The two ends of the fourth sidewall 114 are respectively connected to the ends of the first sidewall 111 and the third sidewall 113 on the opposite side. The two ends of the partition 115 are respectively connected to the second sidewall 112 and the fourth sidewall 114. The partition 115 is located between the first sidewall 111 and the third sidewall 113. Between the sidewall portions 113, 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 first through hole 116 penetrates the partition portion 115 to form the first sub-hole 1163, the first through hole 116 penetrates the first sidewall portion 111 to form the second sub-hole 1161, the first through hole 116 penetrates the third sidewall portion 113 to form the third sub-hole 1162, the first sleeve 31 passes through the second sub-hole 1161, and the second sleeve 32 passes through the third sub-hole 1162.

[0212] The first sidewall 111, the second sidewall 132, the third sidewall 113, and the fourth sidewall 114 are connected end to end to enclose and form the internal cavity of the beam body 11. The first sidewall 111, the second sidewall 132, the third sidewall 113, and the fourth sidewall 114 constitute the frame structure of the beam body 11, and the partition 115 is the partition structure inside the beam body 11. The beam body 11 is a profile beam, sheet metal beam, etc. For example, the first step surface 3212 abuts against the third sidewall 113.

[0213] 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.

[0214] 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.

[0215] The beam 11 is provided with a first through hole 116 that runs through the entire beam. The first 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 passing through the partition portion 115 forms the first sub-hole 1163, the portion of the first through hole 116 that passes through the first side wall portion 111 forms the second sub-hole 1161, and the portion that passes through the third side wall portion 113 forms the third sub-hole 1162. 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.

[0216] The first sleeve 31 is inserted into the second sub-hole 1161, allowing it to be inserted into the beam 11; the second sleeve 32 is inserted into the third sub-hole 1162, allowing it to be inserted into the beam 11. Alternatively, the second sleeve 32 may not be inserted into the first sub-hole 1163, but the first sleeve 31 may be inserted into the first sub-hole 1163 to connect with the second sleeve 32; or the first sleeve 31 may not be inserted into the first sub-hole 1163, but the second sleeve 32 may be inserted into the first sub-hole 1163 to connect with the first sleeve 31; or both the first sleeve 31 and the second sleeve 32 may be inserted into the first sub-hole 1163 to facilitate connection between the second sleeve 32 and the first sleeve 31.

[0217] 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.

[0218] In some embodiments, the first through hole 116 penetrates the partition portion 115 to form a first sub-hole 1163, and the second sleeve 32 passes through the first sub-hole 1163.

[0219] 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.

[0220] By adopting the technical solution of this embodiment, the second sleeve 32 is inserted into the first sub-hole 1163, the second sleeve 32 passes through the partition part 115, the second sleeve 32 is inserted into the beam body 11 to a large depth, and the second sleeve 32 can also support the partition part 115, which is beneficial to improving the support capacity and deformation resistance of the beam body 11.

[0221] Please refer to Figures 4-8 In some embodiments, the receiving hole 103 penetrates the first wall 121 to form a second through hole 1210. The first sleeve 31 includes a first sleeve section 312 and a second sleeve section 313 connected to each other. One of the second sleeve section 313 and the second sleeve 32 passes through the other. At least a portion of the first sleeve section 312 passes through the second through hole 1210 and the first through hole 116. The outer diameter of the first sleeve section 312 is larger than the outer diameter of the second sleeve section 313.

[0222] The first sleeve 31 is a stepped sleeve, which passes through the second through hole 1210 and the first through hole 116. The second sleeve section 313 may be partially located in the first through hole 116 or entirely located in the first through hole 116. The first sleeve section 312 and the second sleeve section 313 are arranged approximately coaxially. The outer diameter of the first sleeve section 312 is larger than the outer diameter of the second sleeve section 313, that is, D1 > D2.

[0223] In some examples, a third step surface 3122 is formed between the first sleeve segment 312 and the second sleeve segment 313, and the first sleeve 31 can use the third step surface 3122 to divide the first sleeve segment 312 and the second sleeve segment 313.

[0224] In some examples, the first sleeve section 312 can be clearance-fitted with the second through hole 1210, and the second sleeve section 313 can be clearance-fitted with the first through hole 116 to facilitate the insertion of the first sleeve 31. The fourth sleeve section 322 can be clearance-fitted with the first through hole 116 to facilitate the insertion of the second sleeve 32.

[0225] In some examples, the second sleeve section 313 is inserted inside the second sleeve 32.

[0226] 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.

[0227] 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 makes the outer diameter of the fourth sleeve section 322 larger than the outer diameter of the second sleeve section 313.

[0228] In some examples, the second sleeve 32 is inserted into the second sleeve section 313.

[0229] 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 second through hole 1210 and the first 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 improve the shear resistance of the first sleeve 31 and reduce the possibility of the first sleeve 31 being sheared.

[0230] In some embodiments, the first sleeve 31 and the second sleeve 32 are threaded together.

[0231] In some examples, the first sleeve 31 is inserted into the second sleeve 32. The first sleeve 31 is provided with external threads, and the second sleeve 32 is provided with internal threads. The connection between the first sleeve 31 and the second sleeve 32 is achieved by the meshing of the internal and external threads.

[0232] For example, 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.

[0233] For example, 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.

[0234] In some examples, the second sleeve 32 is inserted into the first sleeve 31. The second sleeve 32 is provided with external threads, and the first sleeve 31 is provided with internal threads. The connection between the first sleeve 31 and the second sleeve 32 is achieved by the meshing of the internal and external threads.

[0235] 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, the second sleeve 32 and the first sleeve 31 clamp the beam 11 and the first wall 121, which can provide preload to the first sleeve 31 and the second sleeve 32, thereby reducing the possibility of unwinding between the first sleeve 31 and the second sleeve 32 and improving the reliability of the sleeve assembly 30.

[0236] Please refer to Figure 4 In some embodiments, at least a portion of the threaded connection area between the first sleeve 31 and the second sleeve 32 is located in the first through hole 116.

[0237] The threaded connection area between the first sleeve 31 and the second sleeve 32 can refer to the area where the threads of the first sleeve 31 and the second sleeve 32 are connected. The threaded connection area is located within the first through hole 116, that is, within the beam body 11; the threaded connection area may be partially located within the first through hole 116, or it may be entirely located within the first through hole 116.

[0238] 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 first through hole 116, which can play a better supporting role for the beam 11, and is conducive to improving the deformation resistance of the beam 11 and the deformation resistance of the battery device 100.

[0239] Please refer to Figures 4-8 In some embodiments, the receiving hole 103 penetrates the second wall 131 to form a third through hole 1311. The sleeve assembly 30 also 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 third through hole 1311. 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.

[0240] 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.

[0241] 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 is connected to the third sleeve 33 through the third through hole 1311, thereby clamping the second wall 131.

[0242] 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 third through hole 1311 and connects to the second sleeve 32. The portion of the third sleeve 33 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.

[0243] For example, 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.

[0244] 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.

[0245] 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.

[0246] Please refer to 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.

[0247] In some examples, the third sleeve 33 passes through the third 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 third through hole 1311, and the end faces of the third sleeve 33 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.

[0248] In some examples, the second sleeve 32 passes through the third 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.

[0249] 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.

[0250] 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.

[0251] Please refer to Figures 4-8 In some embodiments, a second sealing element 35 is provided between the second sleeve 32 and the second wall 131, and the second sealing element 35 is arranged around the second sleeve 32.

[0252] 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.

[0253] 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 sleeve section 321 and the inner surface of the second wall 131, thereby achieving a sealed connection between the second sleeve 32 and the second wall 131.

[0254] 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.

[0255] Please refer to 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.

[0256] Please refer to Figure 7 and Figure 8 In some embodiments, the outer peripheral surface of the first sleeve section 312 is provided with a limiting structure 3121, which cooperates with the inner wall of the second through hole 1210 to restrict the rotation of the first sleeve 31 within the second through hole 1210, so as to facilitate the rotational tightening of the first sleeve 31 and the second sleeve 32. The limiting structure 3121 may be a plane, a groove, or a protrusion.

[0257] Please refer to 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.

[0258] Please refer to Figures 4-8 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 can seal the first sleeve 31 and the second sleeve 32, which helps to improve the sealing effect of the housing 10. The third sealing element 36 can be a sealant, a sealing ring, a sealing gasket, etc.

[0259] Please refer to Figure 4 In some embodiments, the first wall 121 includes a multi-layered structure.

[0260] 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.

[0261] 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.

[0262] In some embodiments, the first wall 121 may be a single-layer structure.

[0263] Please refer to Figures 9-11In some embodiments, the first wall 121 is provided with a flow channel 12112 for the flow of heat exchange medium.

[0264] The first wall 121 has a flow channel 12112 inside, through which the heat exchange medium flows and exchanges heat with the battery cell 20, thereby achieving temperature control of the battery cell 20. The flow channel 12112 can adopt a serpentine, straight, or bent structure. The first wall 121 is a heat exchange plate, such as a water-cooled plate.

[0265] In some examples, the first wall 121 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.

[0266] In some examples, the first wall 121 is a multi-layered structure, and the flow channel 12112 can be formed by stacking multiple layers of plates.

[0267] By adopting the technical solution of this embodiment, the first wall 121 can exchange heat with the battery cell 20 through the flow channel 12112, thereby controlling the temperature of the battery cell 20.

[0268] Please refer to Figures 9-11 In some embodiments, the first wall 121 includes a first sub-wall 1211 and a first wall 121 stacked together. The first sub-wall 1211 is located between the first wall 121 and the beam 11. A second through hole 1210 penetrates the first sub-wall 1211 to form a first hole segment 12111. The second through hole 1210 penetrates the first sub-wall 1211 to form a second hole segment 12121. A first sleeve segment 312 passes through the first hole segment 12111 and the second hole segment 12121. A first protrusion 311 is located on the side of the second sub-wall 1212 facing away from the mounting space 101 and abuts against the second sub-wall 1212.

[0269] 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 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.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] The second through hole 1210 penetrates the first sub-wall 1211 to form the first hole segment 12111. The first hole segment 12111 can penetrate the first sub-wall 1211 along the thickness direction of the first wall 121. The second through hole 1210 penetrates the second sub-wall 1212 to form the second hole segment 12121. The second hole segment 12121 can penetrate the second sub-wall 1212 along the thickness direction of the first wall 121. The first hole segment 12111, the second hole segment 12121, and the first through hole 116 can be arranged approximately coaxially to facilitate the insertion of the first sleeve 31.

[0274] In some cases, the first protrusion 311 is disposed between the first sub-wall 1211 and the second sub-wall 1212, and another sleeve is inserted into or fitted onto the first sleeve section 312 to clamp and fix the second sub-wall 1212, thus achieving the connection between the first sleeve 31 and the first wall 121. This connection method requires the first protrusion 311 to be provided between the first sub-wall 1211 and the second sub-wall 1212, so that before the first sub-wall 1211 and the second sub-wall 1212 of the housing 10 are assembled with the sleeve assembly 30, the first sub-wall 1211 and the second sub-wall 1212 are... 12 requires two separate components, which is not suitable for cases where the bottom plate and heat exchange plate of the housing 10 are connected together before assembly with the sleeve assembly 30. For example, if the housing 10 is a sheet metal housing, the sheet metal housing material is a water-cooling plate fixed to the bottom plate before assembly with the sleeve assembly 30. If a protrusion is used between the water-cooling plate and the bottom plate, the water-cooling plate and the bottom plate need to be disassembled before assembly with the sleeve assembly 30. After assembly, the water-cooling plate and the bottom plate are fixed. This greatly increases the assembly process of the battery device 100 and is not conducive to simplifying the assembly process of the battery device 100.

[0275] 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 hole section 12111 of the first sub-wall 1211 and the second hole section 12121 of the second sub-wall 1212, and then connects to the second wall 131 through the first through hole 116 of the beam 11. The other end of the first sleeve 31 passes through the first hole section 12111 of the first sub-wall 1211, the second hole section 12121 of the second sub-wall 1212 and the first through hole 116 of the beam 11. The first sleeve 31 is provided with a first protrusion 311, which 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 can connect the first wall 121 and the sleeve assembly 30 using the first sleeve 31. 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 116 and the second through hole 1210, 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 manufacturing process of the housing 10 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.

[0276] In some embodiments, the battery device 100 eliminates the first protrusion 311 between the first sub-wall 1211 and the second sub-wall 1212, which simplifies the connection structure between the sleeve assembly 30 and the first wall 121 and also helps to reduce the axial dimension of the battery device 100 along the sleeve assembly 30. The first sleeve 31 has the first protrusion 311 on the outside of the housing 10. The thickness of the first protrusion 311 can be set to be small, thereby reducing the axial dimension of the battery device 100 along the sleeve assembly 30. Alternatively, if the axial dimension of the battery device 100 along the sleeve assembly 30 remains unchanged, the thickness of the first protrusion 311 can be set to be small to increase the space of the installation space 101.

[0277] Please refer to Figure 4 In some embodiments, the first seal 34 is held between the first protrusion 311 and the second sub-wall 1212.

[0278] In some cases, a first protrusion 311 is sandwiched between the first sub-wall 1211 and the second sub-wall 1212. Sealing components are required between the first protrusion 311 and the first sub-wall 1211, and also between the first protrusion 311 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. In contrast, the battery device 100 of this embodiment utilizes a first sealing element 34 for sealing, resulting in fewer sealing components and sealing interfaces, thus improving the sealing reliability of the battery device 100.

[0279] Please refer to Figures 9-11 In some embodiments, the main body 14 includes a first box 12 and a second box 13. The first box 12 has a first wall 121 and a first side wall 122 surrounding the first wall 121. The first side wall 122 forms a cavity opening 123b. The second box 13 covers the cavity opening 123b, so that the first box 12 and the second box 13 surround and form an installation space 101.

[0280] 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.

[0281] The second housing 13 can be a flat plate structure, covering the cavity opening 123b of the first housing 12 to form an installation space 101.

[0282] 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.

[0283] In some examples, the first housing 12 may be referred to as the lower housing 10, and the second housing 13 may be referred to as the upper housing 10 or the top cover.

[0284] 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 a first protrusion 311, which also facilitates the overall manufacturing of the first box 12 and simplifies the manufacturing process of the first box 12.

[0285] Please refer to Figures 9-11 In some embodiments, the first housing 12 includes a first plate 123 and a second plate 124. The first plate 123 is recessed to form 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 second plate 124 is located in the mounting cavity 123a and is stacked with the first cavity wall 1231. The second plate 124 and the first cavity wall 1231 together form the first wall 121.

[0286] The first housing 12 has a basin-shaped structure and can be a sheet metal housing. The first plate 123 of the first housing 12 can be stamped to create 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, and 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 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 a first sidewall 122.

[0287] 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 first plate 123 and the first cavity wall 1231 can form a first wall 121. The second plate 124 can have a single-layer or multi-layer structure.

[0288] 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.

[0289] By adopting the technical solution of this embodiment, the first box 12 is a sheet metal box, which is beneficial to improve the deformation resistance of the first box 12, thereby improving the side impact resistance of the box 10.

[0290] Please refer to Figures 9-11In some embodiments, the second plate 124 forms the first sub-wall 1211, and the first cavity wall 1231 can form the second sub-wall 1212. For example, the second plate 124 can be a heat exchange plate. 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 the present 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, which 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.

[0291] Please refer to 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 fourth through hole 1251 for avoiding the sleeve assembly 30.

[0292] 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.

[0293] A fourth through hole 1251 is provided on the anti-collision elastic coating 125 at the position corresponding to the second through hole 1210. The second through hole 1210 and the fourth through hole 1251 can be arranged approximately coaxially, so that the first sleeve 31 passes through the fourth through hole 1251 into the second through hole 1210. The position of the fourth through hole 1251 corresponds one-to-one with the position of the first protrusion 311. The diameter of the fourth 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 fourth through hole 1251 and abut against the second sub-wall 1212. The first protrusion 311 can be partially located in the fourth through hole 1251, or it can be entirely located in the fourth through hole 1251.

[0294] 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 fourth through hole 1251 can avoid the sleeve assembly 30, so that the sleeve assembly 30 can directly abut against the first wall 121, instead of abutting against the anti-collision elastic coating 125. This can reduce the possibility that the anti-collision elastic coating 125 will slowly collapse and deform poorly due to long-term compression, resulting in insufficient clamping force of the sleeve assembly 30, causing poor sealing and air leakage, which is beneficial to improving the sealing performance of the battery device 100.

[0295] Please refer to Figures 3-11In 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 hole segment 12111, the second sub-wall 1212 is provided with a second hole segment 12121, the beam 11 is provided with a first through hole 116, the second wall 131 is provided with a third through hole 1311, and the anti-collision elastic coating 125 is provided with a fourth through hole 1251.

[0296] 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 hole section 12111, a second hole section 12121, a first through hole 116, and a fourth through hole 1251. The second sleeve section 313 is located within the first through hole 116. The first sleeve section 312 has a first protrusion 311. 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 fourth 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 first 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 third 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.

[0297] Secondly, an electrical device is provided, including the battery device 100 described above.

[0298] By adopting the technical solution of this embodiment, the battery device 100 has good structural reliability, which is beneficial to improving the reliability of the power device.

Claims

1. A battery device, characterized in that, include: Battery cell; The enclosure includes a main body and a beam. The main body includes 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 within the installation space. The beam is located within the installation space and between the first wall and the second wall. The enclosure has a receiving hole that penetrates the first wall, the beam, and the second wall along the first direction. The receiving hole penetrates the beam to form a first through hole. The beam has a first end face that is opposite to the second wall along the first direction. The first through hole penetrates the first end face to form a first end face. A sleeve assembly, at least partially located in the receiving hole, includes a first sleeve and a second sleeve connected along the first direction and passing through the first through hole. The first sleeve is closer to the first wall than the second sleeve. One of the first sleeve and the second sleeve passes through the other, wherein the one located on the outside is the outer sleeve and the one located on the inside is the inner sleeve. The outer sleeve passes through the first end face and the outer diameter of the outer sleeve at the first end face is larger than the outer diameter of the portion of the inner sleeve passing through the outer sleeve. A portion of the second sleeve is located between the first end face and the second wall, and the outer peripheral surface of the portion of the second sleeve located between the first end face and the second wall is provided with an engagement structure for engaging with an external tool.

2. The battery device according to claim 1, characterized in that: The receiving hole penetrates the first wall to form a second through hole. The first sleeve passes through the second through hole, the second sleeve passes through the first sleeve, and the second sleeve passes through the first end hole. A portion of the second sleeve, the beam, a portion of the first wall, and a portion of the first sleeve are stacked along a first direction, such that the second sleeve and the first sleeve clamp the first wall and the beam.

3. The battery device according to claim 2, characterized in that: The outer circumferential surface of the second sleeve is provided with a first stepped surface, which abuts against the end face of the beam facing the second wall.

4. The battery device according to claim 2, characterized in that: The receiving hole penetrates the first wall to form a second through hole, and a portion of the first sleeve passes through the second through hole. The outer peripheral surface of the first sleeve is provided with a first protrusion, which is located on the side of the first wall facing away from the installation space and abuts against the first wall.

5. The battery device according to claim 4, characterized in that: The first wall has a receiving groove located on the side of the first wall facing away from the mounting space, and at least a portion of the first protrusion is accommodated within the receiving groove.

6. The battery device according to claim 5, characterized in that: A first sealing element is held between the first wall and the first protrusion, and the first sealing element is arranged around the first sleeve.

7. The battery device according to any one of claims 2 to 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, and the first through hole penetrates the partition.

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

9. The battery device according to any one of claims 1 to 6, characterized in that: The receiving hole penetrates the first wall to form a second through hole. The first sleeve includes a first sleeve section and a second sleeve section connected to each other, with one of the second sleeve section and the second sleeve passing through the other. At least a portion of the first sleeve section passes through the second through hole and the first through hole, and the outer diameter of the first sleeve section is larger than the outer diameter of the second sleeve section.

10. The battery device according to any one of claims 1 to 6, characterized in that: The first sleeve and the second sleeve are threadedly connected.

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

12. The battery device according to any one of claims 1 to 6, characterized in that: The receiving hole penetrates the second wall to form a third through hole. The sleeve assembly also 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 pass through the third through hole. 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 provided between the second sleeve and the second wall, and the second sealing element is arranged around the second sleeve.

15. The battery device according to any one of claims 1 to 6, characterized in that: The first wall is provided with a flow channel for the flow of heat exchange medium.

16. The battery device according to any one of claims 1 to 6, 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. The second box covers the cavity opening, so that the first box and the second box form the installation space.

17. The battery device according to claim 16, characterized in that: The first housing includes a first plate and a second plate. The first plate is recessed to form 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 second plate is located inside the mounting cavity and is stacked with the first cavity wall. The second plate and the first cavity wall together form the first wall.

18. The battery device according to any one of claims 1 to 6, 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 fourth through hole for avoiding the sleeve assembly.

19. An electrical device, characterized in that: The battery device includes any one of claims 1 to 18.

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