Battery devices and power-consuming devices

Abstract

This application discloses a battery device and an electrical device. The battery device includes: a battery cell assembly, a housing, and a mounting sleeve. The housing accommodates the battery cell assembly and has a mounting beam with mounting holes. The mounting sleeve includes a collapsible structural layer, at least a portion of which is installed within the mounting holes. The collapsible structural layer includes a first structural layer and a second structural layer radially. The second structural layer surrounds the radially outer side of the first structural layer and includes multiple stiffeners connected to the outer peripheral surface of the first structural layer, forming a collapsible space. According to the battery device of this application, the load-bearing capacity of the first structural layer helps reduce the risk of axial deformation of the mounting sleeve. The multiple stiffeners of the second structural layer allow the mounting sleeve to collapse and deform effectively during a side impact, thereby reducing the risk of damage to the battery cell assembly from the mounting sleeve during a side impact and improving the safety of the battery device.

Description

Technical Field

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

[0002] In related technologies, battery devices are mounted on the vehicle chassis or other designated locations via mounting sleeves. These sleeves also facilitate the installation and removal of the battery devices, enabling convenient maintenance and replacement. The mounting sleeves need sufficient strength and rigidity to ensure the strength of the battery device mounting and the torque requirements of the bolts. To guarantee the strength and rigidity of the mounting sleeves, they generally adopt a ring-shaped cylindrical structure. This means that the mounting sleeve has a fixing hole at its center for connecting fasteners, and the fixing wall is a solid structure. While this type of mounting sleeve has high strength, its solid structure means that in the event of a side impact, when the mounting beam and frame of the battery device collapse and deform, the local deformation at the mounting sleeve assembly location is relatively large. This deformation can easily penetrate into the battery box and collide with the individual battery cells, potentially affecting the safety of the battery device. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide a battery device and an electrical device incorporating the battery device, wherein the battery device can be highly reliable and safe.

[0004] In a first aspect, embodiments of this application provide a battery device, comprising: a battery cell assembly; a housing for accommodating the battery cell assembly, the housing having a mounting beam with mounting holes; and a mounting sleeve comprising a collapsible structural layer, at least a portion of which is installed within the mounting holes. The collapsible structural layer comprises a first structural layer and a second structural layer radially along the mounting sleeve. The first structural layer has a fixing hole on its radially inner side that allows a fastener to pass through, and the second structural layer surrounds the first structural layer radially outward. The second structural layer comprises a plurality of stiffeners connected to the outer peripheral surface of the first structural layer and forming a collapsible space. The stiffeners are capable of deforming into the collapsible space when subjected to an external force greater than a threshold.

[0005] In the above-mentioned technical approach, the mounting sleeve is structurally designed into a first structural layer and a second structural layer. The first structural layer bears the load, which helps to reduce the risk of deformation of the mounting sleeve in its axial direction. The second structural layer is connected to the outer circumference of the first structural layer. The multiple stiffeners of the second structural layer can allow the mounting sleeve to collapse and deform better when the vehicle is subjected to a side impact, thereby reducing the risk of damage to the battery cell assembly caused by the mounting sleeve during a side impact and improving the safety of the battery device. In addition, the energy absorption by the collapse of the mounting sleeve can also reduce the overall deformation of the housing, thereby reducing damage to the battery device.

[0006] In some embodiments, the collapse space includes a first collapse space, the stiffeners being adapted to enclose the first collapse space with the first structural layer, the first collapse space extending axially along the mounting sleeve; and / or, the collapse space includes a second collapse space, at least two stiffeners enclosing the second collapse space, the second collapse space extending axially along the mounting sleeve.

[0007] In the above-mentioned technical approach, the second structural layer of the mounting sleeve can be constructed with different shapes of collapsible spaces according to actual needs, which is highly flexible. In addition, the collapsible space extends along the axial direction of the mounting sleeve, which can effectively improve the axial structural strength of the mounting sleeve. At the same time, when the mounting sleeve is subjected to radial force, the stiffeners can effectively collapse and deform and absorb energy, thereby improving the safety of the battery device.

[0008] In some embodiments, the cross-sectional shape of the collapse space along a section perpendicular to the axis of the mounting sleeve is at least one of a circle, a semi-circle, an ellipse, and a polygon.

[0009] In the above-mentioned technical approach, the collapse space can be designed according to actual needs, so that while ensuring the axial structural strength of the second structural layer on the mounting sleeve, it can also collapse and deform well in the radial direction of the mounting sleeve, thereby improving the safety of the battery device.

[0010] In some embodiments, the mounting sleeve further includes a filler that fills at least one of the crumple zones, the filler having a hardness less than that of the crumple zone layer, and / or the filler having elasticity.

[0011] In the above-mentioned technical method, the filler is filled in the collapse space, which can be more stable when the mounting sleeve collapses and deforms, and can absorb more energy. In addition, the filler can be configured with different functions according to actual needs, which can improve the flexibility and practicality of the mounting sleeve.

[0012] In some embodiments, the filler is a foamed material.

[0013] In the above-mentioned technical approach, the foamed material, by combining with the collapse space, plays a role in many aspects such as energy absorption, noise reduction, and enhanced structural stability, thereby improving the overall performance of the mounting sleeve.

[0014] In some embodiments, the collapse structure layer further includes a third structure layer connected to the outer periphery of the second structure layer, wherein both the first structure layer and the third structure layer are solid plates.

[0015] In the above-mentioned technical method, the third structural layer covers the outside of the second structural layer. The third structural layer can protect the stiffening plate, which is beneficial to increase the contact area when the mounting part is connected to the inner wall of the mounting hole, and improve the connection stability. In addition, the third structural layer can also improve the structural strength of the mounting sleeve, and at the same time, it can cooperate with the first structural layer to constrain the deformation of the stiffening plate.

[0016] In some embodiments, the thickness of the first structural layer is greater than the thickness of the third structural layer in the radial direction of the mounting sleeve.

[0017] In the above-mentioned technical approach, the "gradient stiffness" design of the mounting sleeve enables the mounting sleeve to absorb forces well under collapsing deformation, while also making the mounting sleeve lightweight.

[0018] In some embodiments, the third structural layer and the second structural layer are formed of the same metallic material, or the second structural layer is formed of a metallic material and the third structural layer is formed of a non-metallic material.

[0019] In the above-mentioned technical methods, if the second and third structural layers are formed of the same metallic material, the risk of electrochemical corrosion caused by the difference in electrode potential can be reduced. This method is applicable to scenarios that are exposed to harsh environments such as humidity and acid / alkali for a long time, which helps to extend the service life of the structure and reduce maintenance costs. If the second and third structural layers are formed of different materials, the non-metallic material can block the electronic conduction path of galvanic corrosion. At the same time, the non-metallic material has the characteristics of insulation and corrosion resistance, which can further protect the second structural layer formed by the metallic material.

[0020] In some embodiments, the mounting sleeve further includes: an end-face locking attachment connected to one axial end of the second structural layer in the mounting sleeve and extending at least partially radially along the mounting sleeve to one axial end of the third structural layer in the mounting sleeve, the end-face locking attachment being fixedly connected to the mounting beam, wherein the end-face locking attachment and the mounting beam are formed of the same metal material, and the end-face locking attachment and the mounting beam are adapted to be welded.

[0021] In the above-mentioned technical method, the mounting sleeve can be fixedly connected to the mounting beam through the end face locking accessory, and after the end face locking accessory is welded to the mounting beam, the reliability between the mounting sleeve and the mounting beam is high.

[0022] In some embodiments, the dimension of the end face lock accessory along the axial direction of the mounting sleeve is greater than or equal to mm.

[0023] In the above-mentioned technical approach, by ensuring that the end face lock accessory meets the above conditions, the end face lock accessory can have sufficient welding area in the axial direction, thereby reducing the installation difficulty and improving the assembly efficiency when welding the end face lock accessory to the mounting beam.

[0024] In some embodiments, the end-face lock accessory is an annular ring surrounding the axis of the mounting sleeve.

[0025] In the above-mentioned technical methods, the annular end face lock accessory is beneficial to increasing the size of the welding surface, thereby reducing the installation difficulty and improving the assembly efficiency when welding the end face lock accessory to the mounting beam.

[0026] In some embodiments, the stiffener is a flat plate parallel to the axis, and / or the stiffener is an arc-shaped plate curved around a first straight line parallel to the axis.

[0027] In the above-mentioned technical approach, the collapse space can be designed according to actual needs, so as to ensure the axial structural strength of the second structural layer while allowing for better radial collapse deformation, thereby improving the safety of the battery device.

[0028] In some embodiments, at least two collapsible structural layers are provided radially, and the at least two collapsible structural layers are sequentially nested radially.

[0029] In the aforementioned technical approach, the multi-layered structural design enables "graded energy absorption." Different crumple zones can function in stages according to the impact intensity, effectively reducing the risk of overload failure due to a single-layer structure, thereby improving the overall protective performance of the mounting sleeve. Furthermore, the parameters (such as material, thickness, and shape) of each crumple zone can be adjusted according to different working conditions to adapt to complex and varied impact scenarios.

[0030] In some embodiments, the plurality of collapsible structural layers include a first collapsible structural layer and a second collapsible structural layer. Along the axial direction of the mounting sleeve, the length of the second collapsible structural layer is less than the length of the first collapsible structural layer. The second collapsible structural layer is overlaid on the first collapsible structural layer and is fixedly connected to the mounting beam.

[0031] In the aforementioned technical approach, the longer first crumple zone serves as the primary energy-absorbing unit, absorbing most of the impact energy through its larger deformation space and material usage. While the second crumple zone is shorter, it responds rapidly in the initial stages of impact, acting as a "pre-buffer" to reduce the peak load instantaneously borne by the first crumple zone and prevent premature failure. Furthermore, this nested structure with a short outer layer and a long inner layer facilitates disassembly and maintenance, effectively reducing repair costs. Simultaneously, the length ratio and material parameters of the two layers can be flexibly adjusted according to actual working conditions to optimize overall performance.

[0032] In some embodiments, in the axial direction of the mounting sleeve, the second collapsible structural layer is sleeved over one end of the first collapsible structural layer, wherein the outer diameter of the second collapsible structural layer is larger than the diameter of the mounting hole, and the outer diameter of the first collapsible structural layer is smaller than or equal to the diameter of the mounting hole, so that the first collapsible structural layer passes through the mounting hole, and the second collapsible structural layer is located outside the mounting hole and abuts against the surface of the mounting beam, so as to limit the relative position of the mounting sleeve and the mounting beam in the axial direction of the mounting sleeve. Alternatively, the mounting hole includes a first hole segment and a second hole segment along the axial direction, the diameter of the second hole segment and the outer diameter of the second collapsible structural layer are both larger than the diameter of the first hole segment, the first collapsible structural layer passes through the first hole segment, and the second collapsible structural layer passes through the second hole segment.

[0033] In the above-described technical approach, the second collapsible structural layer is fitted over one end of the first collapsible structural layer. Its outer diameter is larger than the outer diameter of the mounting hole and it is fixed to the side of the mounting beam, or it is installed in conjunction with the first collapsible structural layer through stepped mounting holes. This graded buffering method achieves gradual attenuation of impact energy, protecting the mounting beam, improving structural stability and durability, and facilitating maintenance and replacement.

[0034] In some embodiments, the stiffener is welded or bonded to the first structural layer, and / or the first structural layer has an assembly groove, and a portion of the stiffener is embedded in the assembly groove.

[0035] In the above technical approach, the stiffening plate can be connected to the first structural layer according to actual needs, which offers good flexibility.

[0036] In some embodiments, the mounting sleeve is a one-piece molded part.

[0037] Among the above-mentioned technical methods, the one-piece molding process can make the overall rigidity of the mounting sleeve more uniform, and it is not easy to fail due to cracking at the joint when subjected to impact load. In addition, the feature of no assembly simplifies the production process, reduces the accumulation of tolerance of parts, improves assembly accuracy, and reduces the risk of performance degradation caused by loosening at the connection.

[0038] In some embodiments, the mounting beam has at least one cavity, and the mounting hole communicates with at least one of the cavities.

[0039] In the above-mentioned technical methods, the cavity design can reduce the amount of material used while ensuring structural strength, achieve lightweighting, and reduce the overall load; the internal space of the cavity can serve as a buffer area, absorbing energy through the plastic deformation of the cavity wall under impact load, and the collapse structure layer of the mounting sleeve enhances the effect of collapse energy absorption.

[0040] Secondly, embodiments of this application provide an electrical device, which includes a battery device according to the first aspect of this application.

[0041] According to the embodiments of this application, the power device may include a battery device for storing or providing electrical energy. By setting the power device of the above embodiments, the power device of this application can have high reliability and good safety.

[0042] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0043] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0044] Figure 1 The electrical device provided in some embodiments of this application is a structural schematic diagram of a vehicle.

[0045] Figure 2 This is a structural schematic diagram showing the disassembled top cover and frame of the battery device housing according to some embodiments of this application.

[0046] Figure 3 This is a schematic diagram of the mounting sleeve according to the first embodiment of this application.

[0047] Figure 4 This is a schematic diagram of the mounting sleeve from one perspective, representing the second embodiment of this application.

[0048] Figure 5 This is a schematic diagram of the mounting sleeve from another perspective, representing the second embodiment of this application.

[0049] Figure 6 This is a schematic diagram of the mounting sleeve according to the third embodiment of this application.

[0050] Figure 7 This is a structural schematic diagram of the mounting sleeve from another perspective, representing the second embodiment of this application.

[0051] Figure label:

[0052] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Battery Cell Assembly; 20, Housing; 201, Top Cover; 202, Frame; 2021, Side Frame; 2022, Mounting Beam; 203, Base Plate; 204, Cavity; 205, Mounting Hole; 30, Mounting Sleeve; 1, Collapsible Structure Layer; 11, First Structure Layer; 111, Fixing Hole; 12, Second Structure Layer; 121, Rib Plate; 13, Third Structure Layer; 14, End Face Lock Accessory; 21, First Collapsible Space; 22, Second Collapsible Space; 31, First Collapsible Structure Layer; 32, Second Collapsible Structure Layer. Detailed Implementation

[0053] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0055] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0056] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0057] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0059] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0060] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0061] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells, and when there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed connection via a busbar.

[0062] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0063] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0064] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0065] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0066] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0067] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0068] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0069] The technical solutions described in this application are applicable to various battery-powered devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0070] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. Among these, battery devices, as core components of new energy vehicles, have high requirements in terms of safety.

[0071] In related technologies, battery devices are mounted on the vehicle chassis or other designated locations via mounting sleeves. These sleeves also facilitate the installation and removal of the battery devices, enabling convenient maintenance and replacement. The mounting sleeves need sufficient strength and rigidity to ensure the strength of the battery device mounting and the required bolt torque. To guarantee the strength and rigidity of the mounting sleeves, half of them are made of solid material. While this structure provides high strength, its solid nature means that in the event of a side impact, when the mounting beam and frame of the battery device collapse and deform, the localized deformation at the mounting sleeve assembly location can be significant. This deformation can easily penetrate into the battery box and collide with individual battery cells, potentially compromising the safety of the battery device.

[0072] Based on the above considerations, in order to improve the safety of the battery device, the inventors, after in-depth research, designed a battery device that uses a structural design of the mounting sleeve as a first structural layer and a second structural layer. The first structural layer bears the load, which helps reduce the risk of deformation of the mounting sleeve in its axial direction. The second structural layer is connected to the outer circumference of the first structural layer. The multiple ribs of the second structural layer can better compress and deform the mounting sleeve when the vehicle is subjected to a side impact, thereby reducing the risk of damage to the battery cell assembly caused by the mounting sleeve during a side impact and improving the safety of the battery device. In addition, the energy absorption by the compression of the mounting sleeve can also reduce the overall deformation of the housing, thereby reducing damage to the battery device.

[0073] For ease of explanation, the following embodiments use a vehicle as an example to describe in detail the structure of the electrical device, battery device, and battery cell of this application.

[0074] Please refer to Figure 1 , Figure 1 This application provides a schematic diagram of the structure of an electrical device for a vehicle 1000, as shown in some embodiments. The 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. The vehicle 1000 is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving. 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, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.

[0075] The following is for reference. Figures 2-7 A battery device 100 according to an embodiment of the first aspect of this application is described.

[0076] Please refer to Figure 2 and Figure 3 , Figure 2 This is a structural schematic diagram showing the disassembled top cover 201 and frame 202 of the battery device 100 housing 20 according to some embodiments of this application. Figure 3 This is a schematic diagram of the structure of the mounting sleeve 30 according to the first embodiment of this application.

[0077] like Figure 2 and Figure 3As shown, this application proposes a battery device 100, which includes a battery cell assembly 10, a housing 20, and a mounting sleeve 30. The housing 20 is used to accommodate the battery cell assembly 10 and is provided with a mounting beam 2022. The mounting beam 2022 is provided with mounting holes 205. The mounting sleeve 30 includes a collapsible structural layer 1, at least a portion of which is installed in the mounting holes 205. The collapsible structural layer 1 includes a first structural layer 11 and a second structural layer 12 radially. The radially inner side of the first structural layer has a fixing hole 111 that allows a fastener to pass through. The second structural layer 12 surrounds the radially outer side of the first structural layer 11 and includes a plurality of stiffeners 121. The stiffeners 121 are connected to the outer peripheral surface of the first structural layer 11 and form a collapsible space. The stiffeners 121 can deform into the collapsible space when the external force exceeds a threshold.

[0078] like Figure 2 As shown, the housing 20 includes a top cover 201, a frame 202, and a bottom plate 203. The top cover 201 and the bottom plate 203 are respectively connected to the frame 202, forming a closed space inside the housing 20 to accommodate the battery cell assembly 10. The frame 202 includes a side frame 2021 and a mounting beam 2022. The side frame 2021 and the mounting beam 2022 can be integrally formed and then welded together, or the frame 202 can be integrally formed to construct the side frame 2021 and the mounting beam 2022. The integral forming method can be injection molding, extrusion molding, 3D printing, etc., and this application does not impose any limitations. After the frame 202 is formed, it has a cavity 204. When the vehicle 1000 is involved in a side collision, the frame 202 can collapse and absorb energy due to the presence of the cavity 204, which can reduce the damage to the battery cells during the side collision of the vehicle 1000.

[0079] Furthermore, two mounting beams 2022 can be provided. Taking vehicle 1000 as an example, both mounting beams 2022 can extend in the front-rear direction and are located on both sides of the battery cell. The mounting beams 2022 can be installed on the bottom of vehicle 1000 through mounting sleeve 30 and mounting bolts. In this application, mounting sleeve 30 includes a collapsible structural layer 1. At least a portion of the collapsible structural layer 1 is installed in the mounting hole 205. That is, when the mounting sleeve 30 is subjected to force, the collapsible structural layer 1 located in the mounting hole 205 can collapse and deform. For example, in vehicle 1000... During a side impact, the frame 2021, the mounting beam 2022, and the mounting sleeve 30 all deform under stress. Compared to a solid block mounting sleeve 30, the deformation of the mounting sleeve 30 in the above-described embodiment of this application can reduce the intrusion of the mounting sleeve 30 into the housing 20, thereby making it less likely for the frame 2021, the mounting beam 2022, and the mounting sleeve 30 to come into contact with the battery cell assembly 10. Consequently, during a side impact, the battery device 100 is less likely to catch fire or explode due to the impact on the battery cell assembly 10, thus improving the safety of the battery device 100.

[0080] In addition, in the above example, when the mounting sleeve 30 collapses and deforms, it can also absorb a certain amount of collision force, which can reduce the overall deformation of the frame 2021, the mounting beam 2022 and the mounting sleeve 30, thereby reducing the impact of the collision force on the whole vehicle when the vehicle is involved in a side collision.

[0081] Furthermore, the collapsible structural layer 1 includes a first structural layer 11 and a second structural layer 12 in the radial direction. The radial inner side of the first structural layer 11 has a fixing hole 111 that allows a fastener to pass through. The fastener can be the aforementioned mounting bolt or other fixing structures. This application does not impose any restrictions.

[0082] The second structural layer 12 surrounds the radially outer side of the first structural layer 11. The second structural layer 12 includes multiple stiffening plates 121, which are circumferentially connected to the outer circumferential surface of the first structural layer 11. That is, the first structural layer 11 and the second structural layer 12 can be constructed as cylindrical structures, with the first structural layer 11 in the inner layer. After the mounting bolt passes through the fixing hole 111, it can contact the first structural layer 11. Therefore, the first structural layer 11 needs to have a certain structural strength, or in other words, the first structural layer 11 needs to have sufficient structural strength for the mounting sleeve. The axial direction of the sleeve 30 has a certain structural strength. Thus, when the battery device 100 is installed on the bottom of the vehicle 1000 through the mounting sleeve 30 and mounting bolts, the axial force of the mounting sleeve 30 acts on the mounting sleeve 30. The bearing capacity of the first structural layer 11 helps to reduce the risk of deformation of the mounting sleeve 30 in the axial direction. Therefore, by way of example, the first structural layer 11 can be a solid plate-shaped structural layer, and the thickness of the first structural layer 11 in its radial direction can be adjusted according to the bearing capacity requirements.

[0083] The second structural layer 12 includes multiple stiffening plates 121, which are connected to the outer peripheral surface of the first structural layer 11. The stiffening plates 121 and the outer peripheral surface of the first structural layer 11 form an angle, meaning the second structural layer 12 is not a solid structure. The multiple stiffening plates 121 can support the first structural layer 11 and the inner wall of the mounting hole 205, thus preventing the mounting sleeve 30 from easily wobbling radially when it is inserted into the mounting hole 205. Compared to a solid structure, when the vehicle 1000 is involved in a side collision, the impact... When the force is applied to the stiffener 121 by the mounting beam 2022, the stiffener 121 can be deformed more effectively, which can reduce the intrusion of the mounting sleeve 30 into the housing 20. This makes it less likely for the frame 2021, the mounting beam 2022, and the mounting sleeve 30 to come into contact with the battery cell assembly 10. Consequently, when the vehicle 1000 is involved in a side collision, the battery device 100 is less likely to catch fire or explode due to the impact of the battery cell assembly 10, thereby improving the safety of the battery device 100. Alternatively, from another perspective, when the multiple stiffeners 121 deform, they can deform into the collapsible space, making the radial dimension of the mounting sleeve 30 smaller. Thus, after the frame 2021 and the mounting beam 2022 deform, the volume of the mounting sleeve 30 also becomes smaller, which can reduce the intrusion of the mounting sleeve 30 into the housing 20. At the same time, through the energy absorption of the collapsible stiffeners 121, the overall deformation of the frame 2021, the mounting beam 2022, and the mounting sleeve 30 can be reduced, thereby reducing the impact of the collision force on the whole vehicle during a side collision of the vehicle 1000.

[0084] Furthermore, multiple stiffeners 121 surround the outer periphery of the first structural layer 11. The arrangement of the stiffeners 121 can be arranged according to actual needs, and this example does not impose any restrictions. The arrangement of multiple stiffeners 121 allows the mounting sleeve 30 to undergo collapse deformation in a direction perpendicular to the axial direction. That is, when the vehicle 1000 is subjected to a side collision, the mounting sleeve 30 can collapse and deform well, thereby reducing the risk of damage to the battery cell assembly 10 during a side collision of the vehicle 1000 and improving the safety of the battery device 100.

[0085] In one example, in the projection plane perpendicular to the axis of the mounting sleeve 30, the outer peripheral surface of the first structural layer 11 is circular, and at the connection between the stiffener 121 and the outer peripheral surface of the first structural layer 11, the included angle α between the stiffener 121 and the tangent of the outer peripheral surface of the first structural layer 11 satisfies: 0°<a≤90°.

[0086] In other words, when the included angle α is within this range, it can effectively guide stress transmission, allowing the impact force to be gradually dispersed along the connection direction between the stiffener 121 and the circular first structural layer 11, avoiding stress concentration in localized areas that could lead to premature structural failure. Secondly, a reasonable included angle setting can optimize the deformation mode of the collapse space. Upon impact, the stiffener 121 and the circular structural layer work together to cause the second structural layer 12 to collapse along a predetermined path, achieving stable and efficient energy absorption. For example, a smaller included angle helps convert the impact force into axial compressive deformation of the stiffener 121, improving energy absorption efficiency; an included angle close to 90° can enhance the radial bearing capacity of the structure, resisting radial impacts. Furthermore, the combination of the circular first structural layer 11 and the stiffener 121 with a specific included angle can reduce material redundancy while maintaining structural integrity, achieving the goal of lightweight design.

[0087] For example, the included angle α between the stiffening plate 121 and the tangent on the outer peripheral surface of the first structural layer 11 can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 85°, or 90°.

[0088] In the above example, by structurally designing the mounting sleeve 30 into a first structural layer 11 and a second structural layer 12, the load-bearing capacity of the first structural layer 11 helps reduce the risk of deformation of the mounting sleeve 30 in its axial direction. The second structural layer 12 is connected to the outer peripheral surface of the first structural layer 11. The multiple stiffeners 121 of the second structural layer 12 can better collapse and deform the mounting sleeve 30 when the vehicle 1000 is subjected to a side impact, thereby reducing the risk of damage to the battery cell assembly 10 by the mounting sleeve 30 during a side impact of the vehicle 1000 and improving the safety of the battery device 100. In addition, the energy absorption by the collapse of the mounting sleeve 30 can also reduce the overall deformation of the housing 20, thereby reducing damage to the battery device 100.

[0089] Please refer to Figure 4-Figure 6 , Figure 4 This is a structural schematic diagram of the mounting sleeve 30 at one angle according to the second embodiment of this application. Figure 5 This is a structural schematic diagram of the mounting sleeve 30 from another angle, representing a second embodiment of this application. Figure 6 This is a schematic diagram of the structure of the mounting sleeve 30 according to the third embodiment of this application.

[0090] In some embodiments of this application, such as Figure 4-Figure 6As shown, the second structural layer 12 has a collapse space, which includes a first collapse space 21. The stiffener 121 is adapted to enclose the first collapse space 21 with the first structural layer 11. The first collapse space 21 extends along the axial direction of the mounting sleeve 30. The collapse space includes a second collapse space 22. At least two stiffeners 121 enclose the second collapse space 22. The second collapse space 22 extends along the axial direction of the mounting sleeve 30.

[0091] like Figure 6 In the example shown, the stiffener 121 is an arc-shaped plate. The stiffener 121 and the first structural layer 11 enclose a first collapse space 21. There are multiple stiffeners 121. The multiple stiffeners 121 can be evenly spaced along the circumferential direction on the outer circumferential surface of the first structural layer 11. For the arc-shaped plate, in the section perpendicular to the axis, the arc can be a circular arc, an elliptical arc, or an irregular arc. This application does not impose any restrictions.

[0092] like Figure 4 and Figure 5 At least two stiffening plates 121 can also enclose a second collapse space 22, in Figure 4 and Figure 5 In the example, six stiffeners 121 can enclose a second collapsible space 22 with a hexagonal cross-sectional shape.

[0093] You can continue to refer to this. Figure 4 and Figure 5 There is an included angle between two adjacent stiffeners 121 among the plurality of stiffeners 121, so that when the two stiffeners 121 are fitted to the outer peripheral surface of the first structural layer 11, a second collapsing space 22 can also be constructed. Exemplarily, the first structural layer 11 and the second structural layer 12 can be constructed simultaneously by integral molding, that is, the mounting sleeve 30 is integrally molded. The integrally molded mounting sleeve 30 has two structural layers in the radial direction, namely the first structural layer 11 and the second structural layer 12. Exemplarily, the first structural layer 11 and the second structural layer 12 can be constructed by integral molding respectively, and then fixed by welding or bonding. This application does not limit this.

[0094] In this embodiment, both the first collapsible space 21 and the second collapsible space 22 extend along the axial direction of the mounting sleeve 30. That is, the stiffener 121 extends along the axial direction of the mounting sleeve 30. Therefore, the stiffener 121 extending along the axial direction of the mounting sleeve 30 can improve the axial structural strength of the second structural layer 12. Thus, when the mounting sleeve 30 is subjected to axial forces, the second structural layer 12 can better share the axial force of the first structural layer 11, thereby significantly improving the axial structural strength of the mounting sleeve 30. Simultaneously, when the mounting sleeve 30 is subjected to radial forces, the stiffener 121 can better collapse and deform and absorb energy, thereby significantly improving the safety of the battery device 100.

[0095] In the above example, the second structural layer 12 of the mounting sleeve 30 can be constructed with different shapes of collapsible spaces according to actual needs, which is flexible. In addition, the collapsible space extends along the axial direction of the mounting sleeve 30, which can improve the axial structural strength of the mounting sleeve 30. At the same time, when the mounting sleeve 30 is subjected to radial force, the stiffener 121 can also collapse and deform well and absorb energy, thereby improving the safety of the battery device 100.

[0096] In some embodiments of this application, such as Figure 4-Figure 6 As shown, the cross-sectional shape of the collapse space along the axis perpendicular to the mounting sleeve 30 is at least one of a circle, a semi-circle, an ellipse, and a polygon.

[0097] In other words, the collapsible space with a circular cross-section experiences more uniform stress, is more stable during deformation and collapsible energy absorption, and has higher structural stiffness along the axial direction, is easy to process, and is conducive to mass production; the semi-circular shape can be well adapted to narrow spaces, can be flexibly combined, and has the advantage of being lightweight; the elliptical shape can optimize energy absorption according to the impact direction by using the difference in stiffness of the major and minor axes; the polygonal shape can adjust the stiffness in different directions by designing the side length and angle, and can be modularly spliced ​​to form an array structure, and can also actively adjust the position of stress concentration points. When various cross-sectional shapes are combined, the collapsible space can be customized according to actual working conditions, such as impact forces in different directions and installation space constraints, to achieve the optimal balance between energy absorption, structural strength, space utilization, and cost control.

[0098] For example, the polygon can be a regular polygon, such as an equilateral triangle, a square, a regular pentagon, a regular hexagon, etc. The structure of a regular polygon can make it more stable during collapse deformation.

[0099] In the above example, the collapse space can be designed according to actual needs, so that while ensuring the axial structural strength of the second structural layer 12 on the mounting sleeve 30, it can collapse and deform well in the radial direction of the mounting sleeve 30, thereby improving the safety of the battery device 100.

[0100] In some embodiments of this application, the mounting sleeve 30 further includes a filler that fills at least one crumple zone, the filler having a hardness less than that of the crumple zone structure layer 1, and / or the filler having elasticity.

[0101] In other words, the filler, placed within the collapse space, alters the deformation mode of the collapse space, allowing it to absorb more energy upon impact through friction, compression, and deformation with the filler material. For example, foamed metal fillers can buffer the impact force on the mounting sleeve 30, slow down the deformation rate of the collapse space, disperse stress, and reduce the peak impact value. The filler can also enhance the stability of the collapse space, preventing premature buckling or instability, thus facilitating the orderly energy absorption process. Furthermore, the filler can be customized to meet specific needs, such as adding sound-insulating or heat-insulating materials, allowing the collapse space to fulfill its buffering function while also meeting additional requirements like sound insulation, noise reduction, and temperature control. This approach offers high practicality and flexibility.

[0102] For example, the hardness of the filler is less than that of the collapse structure layer 1, and the filler is elastic, which makes the filler more likely to collapse and absorb energy than the collapse structure layer 1. This can better slow down the deformation rate of the collapse space, disperse stress, reduce the impact peak, and enhance the stability of the collapse space, preventing it from buckling or becoming unstable prematurely, which is conducive to the orderly progress of the energy absorption process.

[0103] In the above example, the filler is filled in the collapse space, which can make it more stable when the mounting sleeve 30 collapses and deforms, and can absorb more energy. In addition, the filler can be configured with different functions according to actual needs, which can improve the flexibility and practicality of the mounting sleeve 30.

[0104] In some embodiments of this application, the filler is a foamed material.

[0105] In other words, there are many types of foam materials, and their application in crumple zones can enhance their performance. Among common foam materials, polyurethane foam has good flexibility and cushioning properties, a wide range of adjustable densities, and low-density polyurethane foam is lightweight and has high energy absorption efficiency, effectively absorbing impact energy in lightweight designs. High-density polyurethane foam has higher strength, providing structural support for crumple zones and delaying cavity deformation. Polystyrene foam is low in cost and easy to mold, and its closed-cell structure gives it good thermal and sound insulation properties. When used in crumple zones, it not only cushions impacts but also reduces noise and heat transfer. There are also metal-based foam materials, such as aluminum-based foam, which combine the high strength of metals with the porous characteristics of foam. They can maintain stable mechanical properties under high temperature and high pressure environments, withstand large load impacts, absorb energy, and prevent brittle fracture of the crumple zone. By combining with the crumple zone, foam materials play a role in energy absorption, noise reduction, and enhancing structural stability, thereby improving the overall performance of the mounting sleeve 30.

[0106] In the above example, the foamed material, by combining with the collapse space, plays a role in many aspects such as energy absorption, noise reduction, and enhanced structural stability, thereby improving the overall performance of the mounting sleeve 30.

[0107] In some embodiments of this application, such as Figures 3-6 As shown, the collapse structure layer 1 also includes a third structure layer 13, which is connected to the outer periphery of the second structure layer 12. Both the first structure layer 11 and the third structure layer 13 are solid plates.

[0108] In other words, the first structural layer 11 and the third structural layer 13 can cooperate to improve the axial structural strength of the mounting sleeve 30. Furthermore, the second structural layer 12 is located between the first structural layer 11 and the third structural layer 13. When the stiffener 121 of the second structural layer 12 deforms, the cooperation of the first structural layer 11 and the third structural layer 13 can effectively constrain the deformation path of the stiffener 121, allowing it to undergo controllable collapse deformation along the influence path, and making the collapse energy absorption process more stable and efficient. In addition, the third structural layer 13 covers the outside of the second structural layer 12, protecting the stiffener 121 and increasing the contact area when the mounting sleeve 30 connects to the inner wall of the mounting hole 205, thus improving connection stability. Figure 3 In the example shown, the two ends of the stiffener 121 are connected to the first structural layer 11 and the third structural layer 13 respectively. The stiffener 121 has good structural stability, which enables the battery device 100 to be installed at the bottom of the vehicle 1000 through the mounting sleeve 30 and mounting bolts.

[0109] For example, the first structural layer 11 can be a steel plate or an aluminum plate. When the first structural layer 11 is a steel plate, its thickness in the radial direction of the mounting sleeve 30 is greater than or equal to 0.5 mm. When the first structural layer 11 is an aluminum plate, its thickness in the radial direction of the mounting sleeve 30 is greater than or equal to 1 mm.

[0110] For example, the third structural layer 13 can be a steel plate or an aluminum plate. When the third structural layer 13 is a steel plate, its thickness in the radial direction of the mounting sleeve 30 is greater than or equal to 0.5 mm. When the third structural layer 13 is an aluminum plate, its thickness in the radial direction of the mounting sleeve 30 is greater than or equal to 1 mm.

[0111] In the above example, the third structural layer 13 covers the outside of the second structural layer 12. The third structural layer 13 can protect the stiffener 121, which is beneficial to increase the contact area when the mounting sleeve 30 is connected to the inner wall of the mounting hole 205, and improve the connection stability. In addition, the third structural layer 13 can also improve the structural strength of the mounting sleeve 30, and at the same time, it can cooperate with the first structural layer 11 to constrain the deformation of the stiffener 121.

[0112] In some embodiments of this application, the thickness of the first structural layer 11 is greater than the thickness of the third structural layer 13 in the radial direction of the mounting sleeve 30.

[0113] In other words, the thickness of the first structural layer 11 is greater than that of the third structural layer 13, forming a "gradient rigidity" design. The thicker first structural layer 11, with its higher structural strength, can prevent the rapid failure of the mounting sleeve 30 and the mounting bolts passing through it. Meanwhile, the thinner third structural layer 13 provides auxiliary support in the later stages of deformation of the second structural layer 12, preventing premature rupture of the outer layer and ensuring the integrity and orderliness of the energy absorption process. This "inner strength and outer toughness" gradient design allows the force to attenuate and disperse layer by layer, reducing the risk of local stress concentration. At the same time, the differentiated thickness reduces the overall material usage, balancing energy absorption efficiency and lightweight requirements.

[0114] In the above example, by designing the "gradient stiffness" of the mounting sleeve 30, the mounting sleeve 30 can better absorb the force on the basis of collapse deformation, and at the same time, the mounting sleeve 30 has the characteristics of being lightweight.

[0115] In some embodiments of this application, the third structural layer 13 and the second structural layer 12 are formed of the same metallic material, or the second structural layer 12 is formed of a metallic material and the third structural layer 13 is formed of a non-metallic material.

[0116] In other words, the third structural layer 13 and the second structural layer 12 are designed using homogeneous metallic or non-metallic / metallic materials, which effectively avoids the problem of galvanic corrosion between dissimilar metals and significantly improves the durability and reliability of the collapsible structure. When both are formed from the same metallic material, the risk of electrochemical corrosion caused by differences in electrode potential can be reduced, making it suitable for long-term exposure to harsh environments such as humidity and acid / alkali, thus extending the service life of the structure and reducing maintenance costs. If the second structural layer 12 is metallic and the third structural layer 13 is non-metallic (such as high-strength engineering plastics or composite materials), the non-metallic material can block the electron conduction path of galvanic corrosion, while leveraging the insulation and weather resistance advantages of the non-metallic material to further protect the metallic structural layer. In addition, the non-metallic third structural layer 13 can also provide additional functions such as lightweighting, heat insulation, and noise reduction, optimizing overall performance. This avoids the potential risks of reduced structural strength and premature failure of the mounting sleeve 30 due to corrosion, ensuring that the collapsible structure stably plays a buffering and energy-absorbing role throughout its entire life cycle.

[0117] For example, the metallic material can be copper or aluminum, etc., and this application does not limit it.

[0118] In the above examples, if the third structural layer 13 and the second structural layer 12 are formed of the same metallic material, the risk of electrochemical corrosion caused by the difference in electrode potential can be reduced. This is suitable for scenarios that are exposed to harsh environments such as humidity and acid / alkali for a long time, which helps to extend the service life of the structure and reduce maintenance costs. If the second structural layer 12 and the third structural layer 13 are formed of different materials, the non-metallic material can block the electronic conduction path of galvanic corrosion, and at the same time give full play to the insulation and weather resistance advantages of the non-metallic material, further protecting the metallic structural layer.

[0119] Please refer to Figure 7 , Figure 7 This is a structural schematic diagram of the mounting sleeve 30 from another angle, representing the second embodiment of this application.

[0120] In some embodiments of this application, such as Figure 4 and Figure 7 As shown, the mounting sleeve 30 further includes: an end face lock attachment 14, which is connected to one end of the second structural layer 12 in the axial direction of the mounting sleeve 30 and extends at least partially radially along the mounting sleeve 30 to one end of the third structural layer 13 in the axial direction of the mounting sleeve 30. The end face lock attachment 14 is fixedly connected to the mounting beam 2022, wherein the end face lock attachment 14 and the mounting beam 2022 are formed of the same metal material and are suitable for welding.

[0121] In other words, the end face lock accessory 14 can be welded to the mounting beam 2022, and the end face lock accessory 14 and the mounting beam 2022 are made of the same metal material, which facilitates the welding between the end face lock accessory 14 and the mounting beam 2022. Thus, the mounting sleeve 30 can be fixedly connected to the mounting beam 2022 by setting the end face lock accessory 14.

[0122] Furthermore, the end face lock attachment 14 is connected to one end of the second structural layer 12 in the axial direction of the mounting sleeve 30, and extends at least partially to one end of the third structural layer 13 in the axial direction of the mounting sleeve 30. This can effectively increase the radial dimension of the end face lock attachment 14 in the mounting sleeve 30, thereby improving the structural strength of the end face lock attachment 14. This results in higher reliability between the mounting sleeve 30 and the mounting beam 2022 after the end face lock attachment 14 is welded to the mounting beam 2022.

[0123] In the above example, the mounting sleeve 30 can be fixedly connected to the mounting beam 2022 through the end face locking accessory 14, and after the end face locking accessory 14 is welded to the mounting beam 2022, the reliability between the mounting sleeve 30 and the mounting beam 2022 is high.

[0124] In some embodiments of this application, such as Figure 4 and Figure 7 As shown, the dimension of the end face lock accessory 14 along the axial direction of the mounting sleeve 30 is greater than or equal to 1 mm.

[0125] In the above example, by ensuring that the end face lock accessory 14 meets the above conditions, the end face lock accessory 14 can have sufficient welding area in the axial direction of the mounting sleeve 30, thereby reducing the installation difficulty and improving the assembly efficiency when welding the end face lock accessory 14 to the mounting beam 2022.

[0126] For example, the dimension of the end face lock accessory 14 along the axial direction of the mounting sleeve 30 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2mm.

[0127] In some embodiments of this application, such as Figure 4 and Figure 7 As shown, the end face lock accessory 14 is annular around the axis of the mounting sleeve 30.

[0128] In the above example, the annular end face lock accessory 14 can help increase the size of the welding surface, thereby reducing the installation difficulty and improving the assembly efficiency when welding the end face lock accessory 14 to the mounting beam 2022.

[0129] For example, with the battery device 100 mounted on the bottom of the vehicle 1000, the end lock accessory 14 can be located at the upper end of the mounting sleeve 30.

[0130] In some embodiments of this application, such as Figures 3-6 As shown, stiffener 121 is a flat plate, which is parallel to the axis, and / or stiffener 121 is an arc-shaped plate, which is curved around a first straight line, which is parallel to the axis.

[0131] In other words, the stiffener 121, consisting of a flat or curved plate arranged parallel to the axis, can improve the performance of the collapsible structure from multiple dimensions. The flat plate, with its relatively regular shape, can evenly distribute impact force along the axial direction under stress, using its planar stiffness to delay structural buckling and guide the collapse space to fold orderly in a straight line, achieving stable energy absorption. Simultaneously, the flat plate structure is easy to manufacture, and energy absorption efficiency can be optimized by adjusting the plate thickness and spacing. The curved plate, bending around a straight line parallel to the axis, possesses stronger torsional and bending resistance due to its curved surface characteristics. Under complex impacts, the curved design allows stress to diffuse evenly along the curved surface, avoiding localized failure caused by stress concentration, while absorbing more energy through a larger deformation stroke. Furthermore, flat and curved stiffeners 121 can be used in combination, taking into account the advantages of both straight and curved deformation to achieve multi-directional and multi-mode energy absorption effects, enhancing the structure's adaptability to impacts from different angles.

[0132] In addition, Figure 3 In the example, multiple stiffeners 121 are spaced apart, and in the circumferential direction, the distance between two adjacent stiffeners 121 on the outer circumferential surface of the first structural layer can be between 5mm and 30mm.

[0133] Furthermore, in Figure 3 In the example, the third structural layer 13 can be installed on the outside of the second structural layer 12 by welding or bonding.

[0134] In the above example, the collapse space can be designed according to actual needs, so that while ensuring the axial structural strength of the second structural layer 12, it can collapse and deform well in the radial direction, thereby improving the safety of the battery device 100.

[0135] In some embodiments of this application, at least two collapse structure layers 1 are provided radially, and at least two collapse structure layers 1 are sequentially nested radially.

[0136] In other words, the multi-layered structural design enables "graded energy absorption." Different layers of the crumple zone 1 can function in stages according to the impact intensity. The outer layer first withstands low-intensity impacts and provides initial buffering, while the inner layer further absorbs energy as the impact force increases. This effectively reduces the risk of overload failure due to a single-layer structure, thereby improving the overall protective performance of the mounting sleeve 30. Simultaneously, the parameters (such as material, thickness, and shape) of each crumple zone can be adjusted according to different working conditions to adapt to complex and varied impact conditions.

[0137] For example, the two collapsible structural layers 1 can be assembled after being molded independently, or they can be molded in one piece without assembly. In terms of process, the method of assembling after independent molding facilitates flexible replacement of damaged layers, reduces maintenance costs, and is conducive to modular production; while one-time molding reduces assembly steps, avoids strength loss caused by connectors, improves production efficiency, and ensures structural integrity.

[0138] In the above example, the multi-layered structural design enables "graded energy absorption." Different layers of the crumple zone 1 can function in stages according to the impact intensity, effectively reducing the risk of overload failure due to a single-layer structure, thereby improving the overall protective performance of the mounting sleeve 30. At the same time, the parameters (such as material, thickness, and shape) of each crumple zone can be adjusted according to different working conditions to adapt to complex and varied impact conditions.

[0139] In some embodiments of this application, such as Figure 3 and Figure 6 As shown, the multiple collapsible structural layers 1 include a first collapsible structural layer 31 and a second collapsible structural layer 32. Along the axial direction of the mounting sleeve 30, the length of the second collapsible structural layer 32 is less than the length of the first collapsible structural layer 31. The second collapsible structural layer 32 is sleeved on the first collapsible structural layer 31. The second collapsible structural layer 32 is fixedly connected to the mounting beam 2022.

[0140] In the example above, the longer first crumple zone 31 serves as the main energy-absorbing unit, absorbing most of the impact energy thanks to its larger deformation space and material usage. While the second crumple zone 32 is shorter, it responds quickly in the initial stages of impact, acting as a "pre-buffer" to reduce the peak load instantaneously borne by the first crumple zone 31 and prevent premature failure. Furthermore, this nested structure with a short outer layer and a long inner layer facilitates disassembly and maintenance, effectively reducing repair costs. Simultaneously, the length ratio and material parameters of the two layers can be flexibly adjusted according to actual working conditions to optimize overall performance.

[0141] In some embodiments of this application, in the axial direction of the mounting sleeve 30, a second collapsible structural layer 32 is fitted over one end of a first collapsible structural layer 31, wherein the outer diameter of the second collapsible structural layer 32 is larger than the diameter of the mounting hole 205, and the outer diameter of the first collapsible structural layer 31 is smaller than or equal to the diameter of the mounting hole 205, so that the first collapsible structural layer 31 passes through the mounting hole 205, and the second collapsible structural layer 32 is located outside the mounting hole 205 and abuts against the surface of the mounting beam 2022, so as to limit the relative position of the mounting sleeve 30 and the mounting beam 2022 in the axial direction of the mounting sleeve 30. Alternatively, the mounting hole 205 includes a first hole segment and a second hole segment in the axial direction, the diameter of the second hole segment and the outer diameter of the second collapsible structural layer 32 are both larger than the diameter of the first hole segment, the first collapsible structural layer 31 passes through the first hole segment, and the second collapsible structural layer 32 passes through the second hole segment.

[0142] In other words, the second collapsible structural layer 32 is fitted over one end of the first collapsible structural layer 31, and the outer diameter of the second collapsible structural layer 32 is larger than the diameter of the mounting hole 205. The second collapsible structural layer 32 is directly fixed to the surface of the mounting beam 2022, or it is installed in conjunction with the first collapsible structural layer 31 through the stepped mounting holes 205 (first hole segment and second hole segment), which allows the impact force to be transmitted in an orderly manner from the outer layer to the inner layer. When an impact occurs, the second collapsible structural layer 32, with its larger outer diameter, first contacts and absorbs some of the energy, weakening the impact force through its own deformation; subsequently, the impact force is transmitted to the inner first collapsible structural layer 31 for secondary buffering. The design of the stepped mounting holes 205 further optimizes the force transmission path. The second hole segment fits tightly with the second collapsible structural layer 32, limiting its radial displacement and ensuring that the energy is released stably along the axial direction; the first hole segment adapts to the first collapsible structural layer 31, allowing it to deform within a controlled range and avoiding structural failure due to excessive displacement.

[0143] The aforementioned structural design significantly enhances the reliability and safety of the mounting sleeve 30. Through the synergistic effect of the dual crumple zone structure, impact energy is effectively dispersed and absorbed, reducing the risk of damage to the mounting beam 2022 from a single impact and extending the equipment's service life. Simultaneously, the stepped hole design strengthens the structural assembly, reduces loosening and wear between components, and improves the overall structural durability.

[0144] For example, with the battery device 100 mounted on the bottom of the vehicle 1000, the second crumple zone layer 32 is overlaid on the upper end of the first crumple zone layer 31.

[0145] In the above example, the second collapsible structural layer 32 is fitted over one end of the first collapsible structural layer 31. Its outer diameter is larger than the outer diameter of the mounting hole 205 and it is fixed to the side of the mounting beam 2022, or it is installed in conjunction with the first collapsible structural layer 31 through the stepped mounting hole 205. The impact energy is gradually attenuated through graded buffering, protecting the mounting beam 2022, improving structural stability and durability, and facilitating maintenance and replacement.

[0146] In some embodiments of this application, the stiffener 121 is welded or bonded to the first structural layer 11, and / or the first structural layer 11 has an assembly groove, and a portion of the stiffener 121 is embedded in the assembly groove.

[0147] In other words, welding improves the connection strength between stiffener 121 and the first structural layer 11, ensuring that stiffener 121 and the first structural layer 11 maintain coordinated deformation under impact, thus avoiding a decrease in energy absorption efficiency due to connection failure. Bonding, on the other hand, alleviates stress concentration issues through the flexible buffer of the adhesive layer, while simplifying the process and reducing weight. Embedding stiffener 121 into the assembly groove of the first structural layer 11 enhances connection reliability through mechanical fitting. The limiting effect of the assembly groove accurately positions stiffener 121, preventing displacement during impact. When used in conjunction with welding or bonding, it significantly improves connection strength and durability, ensuring efficient energy absorption of the collapsible structure while reducing manufacturing difficulty and cost.

[0148] In the above example, the stiffening plate 121 can be connected to the first structural layer 11 according to actual needs, which provides good flexibility.

[0149] In some embodiments of this application, the mounting sleeve 30 is a one-piece molded part.

[0150] In the above example, the one-piece molding process can make the overall stiffness of the mounting sleeve 30 more uniform, and it is not easy to fail due to cracking at the joint when subjected to impact load. In addition, the feature of no assembly simplifies the production process, reduces the accumulation of tolerance of parts, improves assembly accuracy, and reduces the risk of performance degradation due to loosening at the connection.

[0151] In some embodiments of this application, the mounting beam 2022 has at least one cavity 204, and the mounting hole 205 communicates with at least one cavity 204.

[0152] In the above example, the cavity 204 design can reduce material usage and achieve lightweighting while ensuring structural strength, thus reducing the overall load. The internal space of the cavity 204 can serve as a buffer area, absorbing energy through the plastic deformation of the cavity 204 wall under impact loads. Combined with the collapsible structure layer 1 of the mounting sleeve 30, this enhances the energy absorption effect. Furthermore, the mounting hole 205 communicates with at least one cavity 204, thereby enabling the mounting beam 2022 and the mounting sleeve 30 to form an integral collapsible structure. That is, under impact loads, the mounting sleeve 30 and the mounting... The mounting beam 2022 that contacts the mounting sleeve 30 can collapse synchronously. For example, during the collapse process, the collapsing mounting sleeve 30 and the collapsing mounting beam 2022 can invade each other, thereby reducing the intrusion of the mounting sleeve 30 into the housing 20. This makes it less likely for the frame 2021, the mounting beam 2022, and the mounting sleeve 30 to come into contact with the battery cell assembly 10. Consequently, when the vehicle 1000 is involved in a side collision, the battery device 100 is less likely to catch fire or explode due to the collision with the battery cell assembly 10, thereby improving the safety of the battery device 100.

[0153] For example, a filler may also be provided inside the cavity 204, and this application does not impose any restrictions.

[0154] This application also proposes an electrical device having the battery device 100 of the above embodiments.

[0155] According to the embodiments of this application, the power device may include a battery device 100, which is used to store or provide electrical energy. By setting the power device of the above embodiments, the power device of this application can have high reliability and good safety.

[0156] The battery device 100, other components and operations of the power-consuming device according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0157] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0158] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: Battery cell assembly (10); The housing (20) is used to accommodate the battery cell assembly (10). The housing (20) is provided with a mounting beam (2022) and the mounting beam (2022) is provided with mounting holes (205). A mounting sleeve (30) includes a collapsible structural layer (1), at least a portion of which is installed in the mounting hole (205). The collapsible structural layer (1) includes a first structural layer (11) and a second structural layer (12) along the radial direction of the mounting sleeve (30). In the radial direction of the mounting sleeve (30), the first structural layer (11) has a fixing hole (111) on its radially inner side that allows a fastener to pass through. The second structural layer (12) surrounds the first structural layer (11) on its radially outer side. The second structural layer (12) includes a plurality of stiffeners (121), which are connected to the outer peripheral surface of the first structural layer (11) and form a collapsible space. The stiffeners (121) are capable of deforming into the collapsible space when the external force they are subjected to exceeds a threshold. The collapsible structural layer (1) further includes a third structural layer (13), which is connected to the outer periphery of the second structural layer (12).

2. The battery device according to claim 1, characterized in that, The collapse space includes a first collapse space (21), the stiffening plate (121) is adapted to enclose the first collapse space (21) with the first structural layer (11), the first collapse space (21) extending axially along the mounting sleeve (30); and / or, The collapse space includes a second collapse space (22), which is enclosed by at least two stiffeners (121) and extends along the axial direction of the mounting sleeve (30).

3. The battery device according to claim 2, characterized in that, The cross-sectional shape of the collapse space along a section perpendicular to the axis of the mounting sleeve (30) is at least one of a circle, a semi-circle, an ellipse, and a polygon.

4. The battery device according to claim 3, characterized in that, The mounting sleeve (30) further includes a filler that fills at least one of the crumple spaces, the filler having a hardness less than that of the crumple structure layer (1), and / or having an elasticity.

5. The battery device according to claim 4, characterized in that, The filler is a foamed material.

6. The battery device according to claim 1, characterized in that, Both the first structural layer (11) and the third structural layer (13) are solid plates.

7. The battery device according to claim 6, characterized in that, In the radial direction of the mounting sleeve (30), the thickness of the first structural layer (11) is greater than the thickness of the third structural layer (13).

8. The battery device according to claim 6, characterized in that, The third structural layer (13) and the second structural layer (12) are formed of the same metallic material, or, The second structural layer (12) is formed of a metallic material, and the third structural layer (13) is formed of a non-metallic material.

9. The battery device according to claim 6, characterized in that, The mounting sleeve (30) further includes: an end face lock attachment (14), which is connected to one axial end of the second structural layer (12) and extends at least partially radially to one axial end of the third structural layer (13). The end face lock attachment (14) is fixedly connected to the mounting beam (2022), wherein the end face lock attachment (14) and the mounting beam (2022) are formed of the same metal material, and the end face lock attachment (14) is welded to the mounting beam (2022).

10. The battery device according to claim 9, characterized in that, The dimension of the end face lock accessory (14) along the axial direction of the mounting sleeve (30) is greater than or equal to 1 mm.

11. The battery device according to claim 9, characterized in that, The end face lock attachment (14) is annular around the axis of the mounting sleeve (30).

12. The battery device according to claim 1, characterized in that, The stiffening plate (121) is a flat plate, which is parallel to the axis, and / or, The stiffener (121) is an arc-shaped plate that bends around a first straight line, which is parallel to the axis.

13. The battery device according to claim 1, characterized in that, At least two of the collapsible structural layers (1) are arranged radially, and the at least two collapsible structural layers (1) are sequentially nested radially.

14. The battery device according to claim 13, characterized in that, The plurality of said collapsible structural layers (1) include a first collapsible structural layer (31) and a second collapsible structural layer (32). Along the axial direction of the mounting sleeve (30), the length of the second collapsible structural layer (32) is less than the length of the first collapsible structural layer (31). The second collapsible structural layer (32) is overlaid on the first collapsible structural layer (31). The second collapsible structural layer (32) is fixedly connected to the mounting beam (2022).

15. The battery device according to claim 14, characterized in that, In the axial direction of the mounting sleeve (30), the second collapsible structural layer (32) is sleeved over one end of the first collapsible structural layer (31), wherein, The outer diameter of the second collapsible structural layer (32) is larger than the diameter of the mounting hole (205), and the outer diameter of the first collapsible structural layer (31) is smaller than or equal to the diameter of the mounting hole (205), so that the first collapsible structural layer (31) passes through the mounting hole (205), and the second collapsible structural layer (32) is located outside the mounting hole (205) and abuts against the surface of the mounting beam (2022), so as to restrict the relative position of the mounting sleeve (30) and the mounting beam (2022) in the axial direction of the mounting sleeve (30); or, The mounting hole (205) includes a first hole section and a second hole section along the axial direction. The diameter of the second hole section and the outer diameter of the second collapse structure layer (32) are both larger than the diameter of the first hole section. The first collapse structure layer (31) passes through the first hole section, and the second collapse structure layer (32) passes through the second hole section.

16. The battery device according to claim 1, characterized in that, The stiffener (121) is welded or bonded to the first structural layer (11), and / or the first structural layer (11) has an assembly groove in which a portion of the stiffener (121) is embedded.

17. The battery device according to claim 1, characterized in that, The mounting sleeve (30) is a one-piece molded part.

18. The battery device according to claim 1, characterized in that, The mounting beam (2022) has at least one cavity (204), and the mounting hole (205) communicates with at least one of the cavities (204).

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

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