Battery device, electric device and energy storage device

Abstract

The application provides a battery device, an electric device and an energy storage device, and belongs to the battery field. The battery device comprises a box body, two mounting beams and a plurality of mounting assemblies. The two mounting beams are respectively connected to the two ends of the box body along a first direction. Each mounting beam extends along a second direction and is provided with a mounting hole. The mounting hole penetrates the mounting beam along a third direction. The first direction, the second direction and the third direction are perpendicular to each other. The mounting assembly comprises a mounting connecting piece and a sleeve. The sleeve is inserted into the mounting hole. The mounting connecting piece is arranged in the passage of the sleeve to be detachably connected with a matching piece of the electric device or the energy storage device. Along the length direction of the mounting hole, a first movable gap is formed between the hole wall of the mounting hole and the corresponding sleeve. Along the length direction of the passage, a second movable gap is formed between the inner peripheral wall of the passage and the corresponding mounting connecting piece. The scheme can compensate for the matching error between the mounting connecting piece and the matching piece, and improve the problems that the mounting connecting piece is easy to loosen and fatigue cracks occur.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are crucial for sustainable social development. Batteries, with their ability to store or release energy as needed, are widely used in various electrical devices and energy storage systems, and are an important component in promoting energy transition and sustainable development. For the new energy industry, battery technology is a critical factor in its development.

[0003] To enable rapid installation, removal, and replacement of battery devices, mounting brackets are used to securely connect the battery device's mounting beam to the electric vehicle's or energy storage device's mounting frame, thus fixing the battery device onto the electric vehicle or energy storage device. However, in practical applications, it has been found that these mounting brackets are prone to loosening and even fatigue cracking. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the prior art. Therefore, one objective of this application is to provide a battery device, electrical equipment, and energy storage device to improve the problems of loosening and fatigue cracking of the mounting connectors connecting the mounting beam and the mounting frame in the related art.

[0005] An embodiment of the first aspect of this application provides a battery device, including: a housing, two mounting beams, and multiple mounting components. The two mounting beams correspond one-to-one with and are connected to the two ends of the housing along a first direction. Each of the two mounting beams extends along a second direction and is provided with a mounting hole, which penetrates the mounting beam along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The multiple mounting components correspond one-to-one with the multiple mounting holes. Each mounting component includes a mounting connector and a sleeve. The sleeve is inserted into the corresponding mounting hole, and the central axis of the sleeve is parallel to the third direction. The mounting connector passes through the channel of the sleeve for detachable connection with a mating part of an electrical device or energy storage device. Along the length direction of the mounting hole, there is a first movable gap between the hole wall and the corresponding sleeve. Along the length direction of the channel, there is a second movable gap between the inner peripheral wall of the channel and the corresponding mounting connector. The length direction of the mounting hole intersects with the length direction of the channel.

[0006] In the technical solution of this application embodiment, by designing a first movable gap between the sleeve and the wall of the corresponding mounting hole, and a second movable gap between the mounting connector and the inner peripheral wall of the corresponding channel, the position of the mounting connector can be adjusted by moving the sleeve and / or the mounting connector when the mounting connector and the mating part are not connected. This can compensate for the fitting error between the mounting connector and the mating part, reduce the shear stress of the mounting connector, thereby delaying the wear and loosening or fatigue cracking of the mounting connector and extending the service life of the mounting connector.

[0007] In some embodiments, a flange is connected to one end of the sleeve along a third direction, and the flange is arranged circumferentially along the sleeve; the mounting beam has a first surface and a second surface arranged opposite to each other along a third direction, with the first surface facing the mating member; when the mounting connector is connected to the mating member, the flange contacts the first surface; the first surface is provided with a plurality of limiting grooves corresponding to a plurality of preset positions around the periphery of each mounting hole; at each of the plurality of preset positions, the flange is adapted to the corresponding limiting groove.

[0008] By utilizing the fit between the flange and the limiting groove, the rotation of the flange around the central axis of the sleeve can be restricted, which in turn restricts the rotation of the sleeve around its own central axis, so as to prevent the length direction of the channel from changing. This helps to ensure that the active area of ​​the mounting connector does not change, thereby reliably compensating for the fit error between the mounting connector and the mating part.

[0009] In some embodiments, the sleeve is slidably engaged with the corresponding mounting hole, and the sleeve can slide along the mounting hole when the mounting connector and the mating part are separated; the mounting beam is provided with a first connecting part, and the sleeve is provided with a second connecting part. The first connecting part engages with the second connecting part of the corresponding mounting beam to restrict the rotational freedom of the sleeve about its own central axis, and the second connecting part has a degree of freedom of movement along the length direction of the corresponding mounting hole relative to the first connecting part.

[0010] Using this technical solution, the sleeve can slide continuously and smoothly along the mounting hole, allowing it to slide to any position within its allowable range of motion and lock, which helps to better compensate for the fit error between the mounting connector and the mating part.

[0011] In some embodiments, the first connecting part is a screw connector, and the second connecting part is a protrusion connected to the outer peripheral surface of the sleeve. The protrusion is screwed to the corresponding mounting beam by the screw connector, and the extension direction of the screw connector is parallel to the length direction of the mounting hole.

[0012] Compared with the technical solution of restricting the rotation of the sleeve around its own central axis through a gear and rack mechanism, this embodiment uses a threaded structure to restrict the rotation of the sleeve around its own central axis, which is simpler in structure.

[0013] In some embodiments, the mounting hole is an oblong hole, the hole wall of which includes two arc-shaped walls arranged opposite each other along the length of the oblong hole. The sleeve is cylindrical, and the radius of the outer circumference of the sleeve is equal to the radius of the arc of the arc-shaped walls. In this embodiment, by setting the mounting hole as an oblong hole, the various parts of the mounting hole are smoothly transitioned, which helps to reduce stress concentration.

[0014] In some embodiments, the cross-section of the channel is perpendicular to a third direction, the cross-sectional shape of the channel is waist-shaped, the cross-sectional shape of the mounting connector is circular, and the inner peripheral wall of the channel includes two arc-shaped surfaces arranged opposite each other along the length of the channel, the arc-shaped surfaces being adapted to the mounting connector; when the mounting connector and the mating part are separated, the mounting connector can slide along the channel. This embodiment, by setting the cross-section of the channel to be waist-shaped, and the smooth transition throughout the channel, helps to reduce stress concentration.

[0015] In some embodiments, the length direction of the mounting hole is parallel to the first direction, or the length direction of the mounting hole is parallel to the second direction, or the length direction of the mounting hole is inclined to the first and second directions.

[0016] In some embodiments, the housing includes two side beams arranged opposite each other along a first direction, the two side beams extending along a second direction and corresponding one-to-one with two mounting beams, the mounting beams having a locked state and an unlocked state; in the locked state, the mounting beams are detachably connected to the corresponding side beams; in the unlocked state, the mounting beams can reciprocate relative to the corresponding side beams along the second direction, and the movable distance of the mounting beams along the second direction is L1, the dimension of the first movable gap along the length direction of the mounting hole is L2, the dimension of the second movable gap along the length direction of the channel is L3, L1 / L2∈[5, 15], L1 / L3∈[5, 15].

[0017] This embodiment decouples the mounting beam from the side beam, allowing for adjustments to the mounting beam design for different vehicle models and reducing design costs. Furthermore, the mounting beam can move significantly in the second direction when unlocked, enabling substantial adjustment of the mounting connector's position. Fine-tuning of the connector's position can be achieved using the first and / or second movement gaps, increasing the battery device's versatility and making it suitable for various vehicle models.

[0018] In some embodiments, the mounting beam includes a protrusion, and the side beam is provided with a groove extending along a second direction. The protrusion slides into the groove of the corresponding side beam. This embodiment uses a mechanical structure to achieve the reciprocating translation of the mounting beam along the second direction, which is simple and reliable.

[0019] In some embodiments, the protrusion is detachably connected to the corresponding side beam via a first fastener.

[0020] In some embodiments, the side beam includes a first beam body and a first reinforcing beam. The first beam body is a hollow structure, and the first reinforcing beam is housed within the hollow cavity of the first beam body. The first reinforcing beam divides at least a portion of the hollow cavity into a first cavity and a groove. The first cavity and the groove are arranged sequentially along a first direction. A first fastener passes through the first reinforcing beam along the first direction and is connected to a corresponding protrusion. A first side plate of the first beam body is spaced apart from the first reinforcing beam along the first direction and is located on the side of the first reinforcing beam opposite to the protrusion. The first side plate has a through hole, the axis of which is parallel to the first direction. The orthographic projection of the first fastener along the first direction onto the first side plate falls within the through hole.

[0021] With this technical solution, the first fastener is not connected to the first side plate, reducing the possibility of deformation of the first side plate under stress.

[0022] In some embodiments, the battery device further includes angular connectors, with each mounting beam corresponding to at least one angular connector; the mounting beam includes a second beam body, which, in the locked state, protrudes from the side of the corresponding side beam away from the interior of the housing along a first direction, and the second beam body is detachably connected to the corresponding side beam via at least one angular connector.

[0023] This embodiment improves the connection reliability between the suspended beam and the edge beam by setting up angled connectors, which in turn helps to improve the load-bearing reliability of the suspended beam.

[0024] In some embodiments, two mounting beams form a mounting beam group, and the mounting beam group has multiple beams that are spaced apart sequentially along the second direction.

[0025] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0026] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device in the above embodiments, the battery device being capable of storing electrical energy.

[0027] 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

[0028] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0029] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0030] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0031] Figure 3 This is a partial cross-sectional schematic diagram showing the connection between the battery device and the electrical device according to some embodiments of this application;

[0032] Figure 4 This is a partial structural schematic diagram of a battery device according to some embodiments of this application;

[0033] Figure 5 for Figure 4 Exploded view of the battery device;

[0034] Figure 6 This is a top view schematic diagram of the mounting beam in some embodiments of this application;

[0035] Figure 7 This is a top view of the mounting beam and sleeve according to some embodiments of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1000 vehicles;

[0038] Battery assembly 100, controller 200, motor 300, mounting bracket 400, mating parts 401;

[0039] Battery cell module 10, battery cell 11;

[0040] Box 20, first box 21, second box 22, frame 23, side beam 231, first beam body 2311, first side plate 2311a, bottom plate 2311b, first reinforcing beam 2312, second reinforcing beam 2313, first cavity 2314, slide 2315, second cavity 2316, through hole 2317, first connecting hole 2318, third connecting hole 2319;

[0041] Mounting beam 30, second beam body 31, mounting hole 311, arc wall 3111, limiting groove 312, fifth connecting hole 313, first surface 314, protrusion 32, second connecting hole 321;

[0042] Mounting component 40, mounting connector 41, sleeve 42, channel 421, arc surface 4211, flange 43;

[0043] First fastener 50, second fastener 60, third fastener 70;

[0044] Angle connector 80, first plate 81, fourth connecting hole 811, second plate 82, sixth connecting hole 821. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In the description of the embodiments of this application, the term "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).

[0051] 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," "clockwise," "counterclockwise," "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.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "linking", 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 connection of two components or the interaction between two components.

[0053] In this application, the term "parallel" includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0054] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a specific parameter, it is expected that ranges of 60-110 and 80-120 are also included. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5. In this application, unless otherwise stated, the numerical range "ab" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" have been listed in this article; "0-5" is simply a shortened representation of these numerical combinations. Furthermore, when a parameter is stated as an integer ≥2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0055] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0056] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0057] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0058] In related technologies, the mounting beam of the battery device has mounting holes, through which mounting connectors (e.g., bolts) are passed and fixedly connected to the mounting bracket of the electric vehicle (e.g., the frame of the electric vehicle) or the mounting bracket of the energy storage device, so that the battery device is installed on the electric vehicle or the energy storage device. However, the mounting connectors are prone to loosening or even fatigue cracking.

[0059] After careful investigation, it was found that the cause of this problem is that due to dimensional tolerances and form and position errors in the processing of battery devices and mounting brackets, these errors are superimposed during the assembly of battery devices and mounting brackets, resulting in a large fit error between the mounting connector and the mounting bracket. This leads to a large shear stress on the mounting connector, which can cause the mounting connector to wear and loosen easily, and may also cause fatigue cracks or even breakage, reducing the lifespan of the mounting connector.

[0060] In view of this, this application designs a battery device, which is configured to allow the sleeve to move relative to the mounting beam to change its position in the length direction of the mounting hole, and to allow the mounting connector to move relative to the sleeve to change its position in the length direction of the sleeve's channel. This allows the mounting connector to adjust its position within a certain range, thereby compensating for the fit error between the mounting connector and the mating parts, and reducing the shear stress of the mounting connector. This can improve the problem in related technologies where the mounting connector connecting the mounting beam and the mounting frame is prone to loosening or even fatigue cracking.

[0061] The battery devices described in this application can be used, but are not limited to, in electrical equipment or energy storage devices such as vehicles, ships, or aircraft. A power system comprising the battery cells and battery devices described in this application can be used to construct such electrical equipment or energy storage devices.

[0062] The energy storage device utilizing a battery as a power system in this application embodiment can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output it at appropriate times. For example, the energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage device provided in this application embodiment can be used in any power system that requires energy storage.

[0063] In some embodiments, the energy storage device is an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0064] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet. Each battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, these clusters are connected in parallel to increase the capacity of the energy storage device.

[0065] In this application embodiment, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0066] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0067] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. 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. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 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 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0068] 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.

[0069] Figure 2 An exploded view of a battery device 100 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0070] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0071] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0072] In some embodiments, such as Figure 2As shown, the battery device 100 can be a battery pack, which includes a housing 20 and one or more individual battery cells 10, with the individual battery cells 10 housed within the housing 20. The housing 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of combinations of simple cuboids, cylinders, or spheres. The material of the housing 20 can be an alloy such as aluminum alloy or iron alloy, a polymer such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0073] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0074] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0075] As an example, the housing 20 may include a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 are fastened together to form a closed space inside the housing 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, and can be either non-sealed or sealed to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 11. The first housing 21 may be a top cover or a bottom support plate.

[0076] As an example, the housing 20 may include a top cover, a frame, and a bottom support plate. The top cover and the bottom support plate are respectively connected to the frame, so that the interior of the housing 20 forms an enclosed space to accommodate the battery cell assembly 10.

[0077] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0078] The battery cell 11 provided in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0079] The battery cell 11 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 this application embodiment is not limited to this. As an example, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, or a battery cell 11 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells, etc., and this application has no particular limitation.

[0080] Figure 3 This is a partial cross-sectional schematic diagram showing the connection between the battery device and the electrical device according to some embodiments of this application. Figure 4 This is a partial structural diagram of a battery device according to some embodiments of this application. Figure 5 for Figure 4 An exploded view of the battery assembly. Please refer to [link / reference]. Figures 2 to 5 The battery device provided in this embodiment further includes two mounting beams 30 and multiple mounting components 40. The two mounting beams 30 correspond one-to-one with and are connected to both ends of the housing 20 along a first direction. Each of the two mounting beams 30 extends along a second direction and is provided with a mounting hole 311, which penetrates the mounting beam 30 along a third direction; wherein the first direction, the second direction, and the third direction are perpendicular to each other. Multiple mounting components 40 correspond one-to-one with multiple mounting holes 311. Each mounting component 40 includes a mounting connector 41 and a sleeve 42. The sleeve 42 is inserted into the corresponding mounting hole 311, and the central axis of the sleeve 42 is parallel to the third direction. The mounting connector 41 passes through the channel 421 of the sleeve 42 for detachable connection with the mating part 401 of the electrical equipment or energy storage device. Along the length direction of the mounting hole 311, there is a first movable gap between the hole wall of the mounting hole 311 and the corresponding sleeve 42. Along the length of channel 421, there is a second movable gap between the inner peripheral wall of channel 421 and the corresponding mounting connector 41. The length direction of mounting hole 311 intersects the length direction of channel 421.

[0081] When the box 20 is rectangular, such as Figure 2 As shown, the first direction can be referred to as the width direction of the box 20, the second direction can be referred to as the length direction of the box 20, and the third direction can be referred to as the height direction of the box 20. Figure 2 The first direction can be referenced to the X direction, the second direction to the Y direction, and the third direction to the Z direction. Alternatively, it can be replaced by referring to the length direction of the box 20 for the first direction, the width direction of the box 20 for the second direction, and the height direction of the box 20 for the third direction.

[0082] Mounting assembly 40 refers to a structural component that connects the battery device to other devices, such as electrical equipment or energy storage devices, to mount the battery device onto those other devices. The mounting assembly 40 can be made of various materials, including metals such as steel, aluminum alloy, and titanium alloy, as well as carbon fiber resin composites or ceramic composites.

[0083] The connection between the mounting beam 30 and the box body 20 can be a non-detachable connection (e.g., welding, integral connection) or a detachable connection. The mounting beam 30 can be a solid structure or a hollow structure. The mounting beam 30 has two surfaces arranged opposite each other along a third direction, and mounting holes 311 penetrate both surfaces. Each mounting beam 30 can have multiple mounting holes 311, which are arranged sequentially and at intervals along a second direction, such as... Figure 2 The diagram shows six mounting holes 311. In other embodiments, the number of mounting holes 311 may also be two, three, four, five, seven, etc.

[0084] The phrase "multiple mounting components 40 correspond one-to-one with multiple mounting holes 311" means that the number of mounting components 40 is the same as the number of mounting holes 311, with each mounting component 40 corresponding to one mounting hole 311. Please refer to [link / reference]. Figures 3 to 5 The mounting assembly 40 includes a mounting connector 41 and a sleeve 42. The sleeve 42 is used for connecting, fixing, and bearing loads. The sleeve 42 can be made of metal materials such as steel, aluminum alloy, and titanium alloy, giving it high rigidity to withstand large loads. The sleeve 42 is installed in the mounting hole 311, and the central axis of the sleeve 42 and the central axis of the mounting hole 311 are both parallel to a third direction. In other words, the sleeve 42 extends along a third direction. The sleeve 42 has a channel 421 that extends through the sleeve 42 along a third direction. The mounting connector 41 is a component that connects at least two separate parts. The mounting connector 41 passes through the channel 421 and is detachably connected to the mating part 401 provided on the mounting bracket 400. The mounting bracket 400 can be provided on electrical equipment, so that the battery device can be mounted and fixed to the electrical equipment. For example, if the electrical equipment is an electric vehicle, the mounting bracket 400 can be the frame of the electric vehicle. Mounting bracket 400 can also be set on the energy storage device, so that the battery device can be installed and fixed on the energy storage device.

[0085] The phrase "mounting connector 41 and mating part 401 are detachably connected" indicates that mounting connector 41 and mating part 401 can be connected or separated. In some feasible examples, mounting connector 41 and mating part 401 can be detachably connected by a screw connection; in this example, mounting connector 41 can be a bolt, and mating part 401 is a nut that mates with the bolt. In other feasible examples, mounting connector 41 and mating part 401 can be detachably connected by an interference fit; in this example, mounting connector 41 can be a shaft.

[0086] The sleeve 42 corresponding to the mounting hole 311 refers to the sleeve 42 inserted into the mounting hole 311. The mounting hole 311 has a length direction and a width direction, and the length of the mounting hole 311 is greater than the dimension of the outer peripheral surface of the sleeve 42 inserted into the mounting hole 311 along the length direction of the mounting hole 311. Along the length direction of the mounting hole 311 (hereinafter referred to as the first preset direction), there is a space between the hole wall of the mounting hole 311 and the outer peripheral surface of the sleeve 42 inserted into the mounting hole 311, forming a first movable clearance. The first movable clearance allows the sleeve 42 to move when the mounting connector 41 is separated from the mating part 401 (i.e., the mounting connector 41 and the mating part 401 are not connected). That is, when the mounting connector 41 and the mating part 401 are not connected, the sleeve 42 can move relative to the mounting beam 30, and the movable allowance of the sleeve 42 in the first preset direction is the first movable clearance. It is understandable that there is no gap between the wall of the mounting hole 311 and the outer peripheral surface of the sleeve 42 inserted into the mounting hole 311 along the width direction of the mounting hole 311.

[0087] The mounting connector 41 corresponding to channel 421 refers to the mounting connector 41 that passes through channel 421. The length direction of channel 421 refers to the length direction of the cross section of channel 421 perpendicular to its own axial direction. Along the length direction of channel 421 (hereinafter referred to as the second preset direction), there is a space between the inner peripheral wall of channel 421 and the outer peripheral surface of the mounting connector 41 passing through channel 421, forming a second movable gap. The second movable gap is used to allow the mounting connector 41 to move when it is separated from the mating part 401 (i.e., the mounting connector 41 and the mating part 401 are not connected). That is to say, when the mounting connector 41 and the mating part 401 are not connected, the mounting connector 41 can move relative to the mounting beam 30, and the movable allowance of the mounting connector 41 in the second preset direction is the second movable gap. It can be understood that along the width direction of channel 421, there is no gap between the inner peripheral wall of channel 421 and the outer peripheral surface of the mounting connector 41 passing through channel 421.

[0088] The length direction of the mounting hole 311 (i.e., the first preset direction) intersects with the length direction of the channel 421 (i.e., the second preset direction). This can be understood as the first preset direction and the second preset direction being orthogonal, that is, perpendicular to each other, or it can be understood as the first preset direction and the second preset direction forming an angle.

[0089] In this embodiment, the connection process between the battery device and the electrical equipment or energy storage device can be as follows: providing the battery device; inserting the sleeve 42 into the mounting hole 311; moving the battery device so that each sleeve 42 is approximately aligned with a mating part 401; passing the mounting connector 41 through the channel 421 of the sleeve 42; moving the sleeve 42 to change the relative positional relationship between the sleeve 42 and the mounting hole 311 / moving the mounting connector 41 within the channel 421 to change the relative positional relationship between the mounting connector 41 and the channel 421, thereby adjusting the position of the mounting connector 41 until each mounting connector 41 is aligned with the corresponding mating part 401 (the central axis of the mounting connector 41 and the central axis of the mating part 401 are substantially collinear); applying a preload force to the mounting connector 41 to fix the mounting connector 41 and the mating part 401 together. After the mounting connector 41 is connected to the mating part 401, the mounting connector 41 can no longer move relative to the mounting beam 30.

[0090] This embodiment is designed with a first movable gap between the sleeve 42 and the wall of the corresponding mounting hole 311, and a second movable gap between the mounting connector 41 and the inner peripheral wall of the corresponding channel 421. When the mounting connector 41 and the mating part 401 are not connected, the position of the mounting connector 41 can be adjusted by moving the sleeve 42 and / or the mounting connector 41. This can compensate for the fitting error between the mounting connector 41 and the mating part 401, improve the assembly fault tolerance between the battery device and the electrical equipment or energy storage device, and reduce the shear stress of the mounting connector 41, thereby delaying the wear and loosening or fatigue cracking of the mounting connector 41 and extending the service life of the mounting connector 41.

[0091] Because the length direction of the mounting hole 311 intersects the length direction of the channel 421, the mounting connector 41 is not limited to changing position in a single direction, but can change position within a region. This allows for a higher tolerance for fit errors between the mounting connector 41 and the mating part 401. Moreover, since fit errors between the mounting connector 41 and the mating part 401 can be absorbed and compensated, the machining errors of the battery device and the mounting bracket 400 can be relaxed to a certain extent, and the machining accuracy requirements can be reduced.

[0092] As described above, when the mounting connector 41 and the mating part 401 are separated, the sleeve 42 can move relative to the mounting beam 30 and has multiple positions, which are sequentially arranged along the length direction of the mounting hole 311. There are at least two ways to achieve the movement of the sleeve 42 relative to the mounting beam 30.

[0093] Figure 6 This is a top view schematic diagram of the mounting beam 30 in some embodiments of this application. Figure 7 This is a top view schematic diagram of the mounting beam 30 and sleeve 42 in some embodiments of this application. Firstly, please refer to... Figure 6 and Figure 7 A flange 43 can be connected to one end of the sleeve 42 along a third direction, and the flange 43 is arranged circumferentially along the sleeve 42. The mounting beam 30 has a first surface 314 and a second surface arranged opposite to each other along a third direction, with the first surface 314 facing the mating member 401. When the mounting connector 41 is connected to the mating member 401, the flange 43 contacts the first surface 314. The first surface 314 has a plurality of limiting grooves 312 on the periphery of each mounting hole 311, corresponding to a plurality of preset positions. At each of the plurality of preset positions, the flange 43 is adapted to the corresponding limiting groove 312.

[0094] The flange 43 is arranged circumferentially along the sleeve 42, thus the flange 43 is annular. The outer contour shape of the flange 43 can be, but is not limited to, a circular ring, a polygon, etc. The flange 43 and the sleeve 42 can be integrally formed, or they can be formed separately and then assembled together. Figure 4 and Figure 5 The first surface 314 is the top surface of the mounting beam 30, the second surface is the bottom surface of the mounting beam 30, and the flange 43 overlaps the top surface of the mounting beam 30. The flange 43 can increase the bearing area of ​​the sleeve 42 to reduce the deformation and crushing of the mounting beam 30.

[0095] The fitting of flange 43 with the corresponding limiting groove 312 means that the shape and size of flange 43 match the shape and size of limiting groove 312. For example... Figure 6 and Figure 7 As shown, the first surface 314 can be provided with 5 limiting grooves 312, and correspondingly, the sleeve 42 has 5 preset positions. The flange 43 is waist-shaped, and the limiting grooves 312 are also waist-shaped. A portion of the waist-shaped limiting groove 312 coincides with the mounting hole 311. The outline of the portion of each limiting groove 312 that coincides with the mounting hole 311 is... Figure 6 The area is indicated by a double-dotted line, but in reality, the limiting groove 312 does not have a double-dotted line. Of course, in other embodiments of this application, the preset positions of the limiting groove 312 and the sleeve 42 can also be 2, 3, 4, etc.

[0096] In this embodiment, during the assembly of the battery device with the electrical equipment or energy storage device, the flange 43 can be first embedded in one of the limiting grooves 312. In order to align each mounting connector 41 with the corresponding mating part 401, the sleeve 42 can be moved along its axial direction so that the flange 43 moves out of the limiting groove 312. The sleeve 42 is then moved along its axial direction to disengage from the mounting hole 311. The sleeve 42 is then moved until the flange 43 is aligned with another limiting groove 312. The sleeve 42 is then moved along its axial direction so that the sleeve 42 is inserted into the mounting hole 311 until the flange 43 is embedded in another limiting groove 312.

[0097] Using this technical solution, since the sleeve 42 has multiple preset positions, the position of the mounting connector 41 can be adjusted by switching the sleeve 42 to different preset positions. Furthermore, since the flange 43 is adapted to the corresponding limiting groove 312 at each preset position, the mating relationship between the flange 43 and the limiting groove 312 restricts the flange 43 from rotating around the central axis of the sleeve 42, thereby restricting the sleeve 42 from rotating around its own central axis. This prevents changes in the length direction of the channel 421, ensuring that the active area of ​​the mounting connector 41 remains unchanged, and reliably compensating for the mating error between the mounting connector 41 and the mating part 401.

[0098] Secondly, the sleeve 42 and the corresponding mounting hole 311 can be configured for a sliding fit, allowing the sleeve 42 to slide along the mounting hole 311 when the mounting connector 41 and the mating part 401 are separated. Each mounting beam 30 is provided with a first connecting part, and the sleeve 42 is provided with a second connecting part. The first connecting part cooperates with the second connecting part of the corresponding mounting beam 30 to restrict the rotational freedom of the sleeve 42 about its own central axis, and the second connecting part has a degree of freedom of movement along the length direction of the corresponding mounting hole 311 relative to the first connecting part.

[0099] The first connecting part can be fixedly connected to the mounting beam 30 or movably connected to the mounting beam 30. The second connecting part can be directly connected to the sleeve 42 or indirectly connected to the sleeve 42 through other structures. For example, when the first direction is the forward and backward direction of the electric vehicle, the first connecting part of the front mounting beam 30 and the second connecting part of the sleeve 42 inserted into the front mounting beam 30 correspond to each other.

[0100] In this embodiment, the mating relationship between the first connecting part and the corresponding second connecting part allows the sleeve 42 to move freely along the length direction of the mounting hole 311 within the mounting hole 311, but it cannot rotate around its own central axis. During the assembly process of the battery device with the electrical equipment or energy storage device, in order to align each mounting connector 41 with the corresponding mating part 401, an external force can be applied to the sleeve 42, causing the sleeve 42 to slide along the mounting hole 311 into which it is inserted, thus changing the position of the sleeve 42.

[0101] Using this technical solution, the sleeve 42 can slide continuously and smoothly along the mounting hole 311. In this way, the sleeve 42 can slide to any position within the allowable range of motion and stay there (i.e., remain in that position). This is beneficial for more accurate alignment of each mounting connector 41 with the corresponding mating part 401, and can better compensate for the fitting error between the mounting connector 41 and the mating part 401.

[0102] It is understandable that the first connecting part cooperates with the second connecting part provided on the corresponding mounting beam 30 to restrict the rotational freedom of the sleeve 42 around its own central axis, and the specific implementation of the second connecting part having the degree of freedom of movement along the length direction of the corresponding mounting hole 311 relative to the first connecting part is also varied.

[0103] In some possible embodiments, a flange 43 may be connected to one end of the sleeve 42 along a third direction, and the flange 43 is arranged circumferentially along the sleeve 42. The mounting beam 30 has a first surface 314 and a second surface arranged opposite to each other along a third direction, with the first surface 314 facing the mating member 401. When the mounting connector 41 is connected to the mating member 401, the flange 43 contacts the first surface 314. Furthermore, the first connecting part can be a gear, located on the side of the first surface 314 opposite to the second surface, and the gear is rotatably connected to the mounting beam 30, with the rotation axis of the gear extending along a third direction. The second connecting part can be a rack, which is fixedly disposed on the circumferential side of the flange 43 to indirectly connect to the sleeve 42 through the flange 43. The rack extends along the length direction of the mounting hole 311 and meshes with the gear. Furthermore, along the width direction of the mounting hole 311, the rack is located between the gear and the mounting hole 311.

[0104] In this embodiment, to align each mounting connector 41 with its corresponding mating part 401, a thrust can be applied to the flange 43. This thrust is transmitted to the rack, causing the rack and the flange 43 connected to the rack to move along the length of the mounting hole 311. Consequently, the gear rotates relative to the mounting beam 30. Using this technical solution, the meshing relationship between the rack and the gear can restrict the rotation of the sleeve 42 around its own central axis.

[0105] In some possible embodiments, the first connecting part can be a screw connector, and the second connecting part can be a protrusion connected to the outer peripheral surface of the sleeve 42. The protrusion is screwed to the corresponding mounting beam 30 by a screw connector, and the extension direction of the screw connector is parallel to the length direction of the mounting hole 311.

[0106] The protrusion and sleeve 42 can be integrally formed, or they can be formed separately and then assembled together. The protrusion has a first fixing hole, and the mounting beam 30 has a second fixing hole. The first and second fixing holes are coaxially arranged, and the central axis of both the first and second fixing holes extends along the length direction of the mounting hole 311. The first and second fixing holes are screwed together by a screw connector. In the embodiments of this application, the screw connector can be a machine screw, and both the first and second fixing holes are threaded holes; alternatively, the screw connector can be a self-tapping screw, and both the first and second fixing holes are bottom holes that mate with the self-tapping screw.

[0107] In this embodiment, during the assembly of the battery device with the electrical equipment or energy storage device, in order to align each mounting connector 41 with the corresponding mating part 401, the sleeve 42 can slide along the mounting hole 311 into which it is inserted by tightening the screws to change its position until the mounting connector 41 is aligned with the corresponding mating part 401, at which point the screws are no longer tightened. Simultaneously, the protrusion is fixedly connected to the mounting beam 30 by the screws, preventing the sleeve 42 from rotating around its own central axis.

[0108] In this embodiment, the sleeve 42 is indirectly connected to the mounting beam 30 through the protrusion, and the protrusion and the mounting beam 30 are screwed together by a screw connector. The threaded engagement between the protrusion and the screw connector generates an axial driving force to drive the protrusion and the sleeve 42 connected to the protrusion to move along the length direction of the mounting hole 311. In this way, the sleeve 42 can be slid by adjusting the screw depth of the screw connector, and the rotation of the sleeve 42 around its own central axis can be restricted. Compared with the technical solution of restricting the rotation of the sleeve 42 around its own central axis by using a gear and rack mechanism, the structure of this embodiment is simpler.

[0109] In some possible embodiments, the first connecting part can be a guide pin fixedly mounted on the mounting beam 30, and the outer peripheral surface of the sleeve 42 can be provided with a protruding bulge. The second connecting part can be a guide hole provided on the bulge, the guide hole cooperating with the guide pin, and the extension direction of the guide pin being parallel to the length direction of the mounting hole 311. In this embodiment, the bulge can move along the guide pin to guide the sleeve 42 connected to the bulge to move along the length direction of the mounting hole 311, and the guide pin can restrict the bulge and the sleeve 42 connected to the bulge from rotating around the central axis of the sleeve 42.

[0110] The shapes of the mounting hole 311 and the sleeve 42 are not limited, as long as there is a first movable gap between the sleeve 42 and the wall of the corresponding mounting hole 311. In some embodiments, the mounting hole 311 and the sleeve 42 can both be rectangular, and the maximum dimension of the sleeve 42 along the width direction of the mounting hole 311 is equal to the width of the mounting hole 311, so that there is no movable gap between the sleeve 42 and the wall of the corresponding mounting hole 311 in the width direction of the mounting hole 311.

[0111] According to some embodiments of this application, such as Figure 4 and Figure 5 As shown, the mounting hole 311 can be an oblong hole, and the hole wall of the oblong hole includes two arc-shaped walls 3111 arranged opposite each other along the length direction of the oblong hole. The sleeve 42 can be cylindrical, and the radius of the outer circumference of the sleeve 42 is equal to the radius of the arc of the arc-shaped wall 3111.

[0112] The oblong hole specifically includes two arc-shaped walls 3111 and two oppositely arranged connecting walls. One arc-shaped wall 3111, one connecting wall, another arc-shaped wall 3111, and another connecting wall are connected end to end in sequence. Both arc-shaped walls 3111 are semi-circular. The straight-line distance between the two connecting walls is equal to twice the radius of the arc of the arc-shaped wall 3111. In this embodiment, the sleeve 42 can slide along the mounting hole 311 between a first limit position and a second limit position. In the first limit position, the outer circumferential surface of the sleeve 42 is in contact with one of the arc-shaped walls 3111, and in the second limit position, the outer circumferential surface of the sleeve 42 is in contact with the other arc-shaped wall 3111.

[0113] Compared to the rectangular mounting hole 311, this embodiment sets the mounting hole 311 to be an oblong hole, with smooth transitions at all parts of the mounting hole 311. This helps to reduce stress concentration. The fit between the outer circumferential surface of the sleeve 42 and the arc-shaped wall 3111 can play an automatic centering role, so that the sleeve 42 can be easily inserted into the mounting hole 311.

[0114] The shapes of the mounting connector 41 and the channel 421 are not limited, as long as there is a second movable gap between the inner circumferential surfaces of the mounting connector 41 and the corresponding channel 421. In some embodiments, the cross-sectional shape of the channel 421 can be rectangular, with the cross-section perpendicular to a third direction as the cross-section.

[0115] According to some embodiments of this application, such as Figure 4 and Figure 5As shown, with a cross-section perpendicular to the third direction as the cross-section, the cross-sectional shape of the channel 421 can be waist-shaped, and the cross-sectional shape of the mounting connector 41 can be circular. The inner peripheral wall of the channel 421 includes two arc-shaped surfaces 4211 arranged opposite each other along the length direction of the channel 421, and the arc-shaped surfaces 4211 are adapted to the mounting connector 41. When the mounting connector 41 is separated from the mating part 401, the mounting connector 41 can slide along the channel 421.

[0116] Both curved surfaces 4211 can be semi-circular. The compatibility of the curved surface 4211 with the mounting connector 41 means that the shape and radius of the curved surface 4211 match the shape and radius of the mounting connector 41. In a specific example, the mounting connector 41 is a bolt, and the bolt type is M10; therefore, the radius of the curved surface 4211 is 5mm. In this embodiment, the mounting connector 41 can slide along the channel 421 between a third and a fourth extreme position. At the third extreme position, the mounting connector 41 is in contact with one of the curved surfaces 4211; at the fourth extreme position, the mounting connector 41 is in contact with the other curved surface 4211.

[0117] Compared to the rectangular cross-section of channel 421, this embodiment sets the cross-section of channel 421 to be waist-shaped, and the channel 421 has a smooth transition at all points, which helps to reduce stress concentration.

[0118] The length direction of the mounting hole 311 varies.

[0119] According to some embodiments of this application, the length direction of the mounting hole 311 may be parallel to the first direction.

[0120] That is, the length direction of the mounting hole 311 is perpendicular to the extension direction of the mounting beam 30. When the length direction of the mounting hole 311 is perpendicular to the length direction of the channel 421, the length direction of the channel 421 is perpendicular to the first direction and parallel to the extension direction of the mounting beam 30. According to some embodiments of this application, the length direction of the mounting hole 311 may also be parallel to the second direction. That is, the length direction of the mounting hole 311 is parallel to the extension direction of the mounting beam 30. When the length direction of the mounting hole 311 is perpendicular to the length direction of the channel 421, the length direction of the channel 421 is perpendicular to the second direction and perpendicular to the extension direction of the mounting beam 30. According to some embodiments of this application, the length direction of the mounting hole 311 is inclined to both the first and second directions; in other words, the length direction of the mounting hole 311 forms an angle with both the first and second directions. When the length direction of the mounting hole 311 is perpendicular to the length direction of the channel 421, the length direction of the channel 421 is also inclined to both the first and second directions.

[0121] According to some embodiments of this application, please refer to Figure 2, Figure 4 and Figure 5 The housing 20 includes two side beams 231 arranged opposite each other along a first direction, and the two side beams 231 extend along a second direction and correspond one-to-one with two mounting beams 30. The mounting beams 30 can be configured to have locked and unlocked states. Figure 4 As shown, in the locked state, the mounting beam 30 is detachably connected to the corresponding side beam 231. In the unlocked state, the mounting beam 30 can reciprocate relative to the corresponding side beam 231 along the second direction, and the movable distance of the mounting beam 30 along the second direction is L1. The dimension of the first movable gap along the length direction of the mounting hole 311 is L2, and the dimension of the second movable gap along the length direction of the channel 421 is L3. L1 / L2∈[5, 15], L1 / L3∈[5, 15].

[0122] The housing 20 includes a first housing 21 and a second housing 22. One of the housings 21 and 22, which has an opening on one side, includes a frame 23. The frame 23 is cuboid in shape and includes two side beams 231 arranged opposite each other along a first direction and two side beams arranged opposite each other along a second direction. When both the first housing 21 and 22 have openings on one side, one of them is connected to a mounting beam 30. That is, the mounting beam 30 can be connected to either the first housing 21 or the second housing 22.

[0123] Taking the application of the battery device in an electric vehicle as an example, with the first direction being the forward-backward direction of the electric vehicle, the front side beam 231 corresponds to the front mounting beam 30, and the rear side beam 231 corresponds to the rear mounting beam 30. When the first direction is the lateral direction of the electric vehicle, the left side beam 231 corresponds to the left mounting beam 30, and the right side beam 231 corresponds to the right mounting beam 30. The mounting beam 30 and its corresponding side beam 231 can be detachably connected using methods such as screw connections or interference fits. When the mounting beam 30 and its corresponding side beam 231 are separated (i.e., not connected), the mounting beam 30 is in an unlocked state. The unlocked state means that the connection between the mounting beam 30 and the side beam 231 is released, and the mounting beam 30 is released and can move relative to the side beam 231. When the mounting beam 30 and its corresponding side beam 231 are fixedly connected, they are in a locked state. The locked state means that the mounting beam 30 is fixed and cannot move relative to the side beam 231.

[0124] "The dimension of the first movable gap along the length of the mounting hole 311 is L2," indicating that the movable distance of the sleeve 42 along the length of the mounting hole 311 is L2, and therefore the movable distance of the mounting connector 41 passing through the sleeve 42 along the length of the mounting hole 311 is L2. "The dimension of the second movable gap along the length of the channel 421 is L3," indicating that the movable distance of the mounting connector 41 along the length of the channel 421 is L3.

[0125] "L1 / L2∈[5, 15]" indicates that the travel of the mounting beam 30 along the second direction is 5 to 15 times the travel of the mounting connector 41 along the length of the mounting hole 311. "L1 / L3∈[5, 15]" indicates that the travel of the mounting beam 30 along the second direction is 5 to 15 times the travel of the mounting connector 41 along the length of the channel 421. L1 / L2 and L1 / L3 can be, for example, a range of 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, or any two of these. For example, L1 can specifically be equal to the dimension of the corresponding side beam 231 along the second direction, where the dimension of the side beam 231 along the second direction can be 1m to 1.5m.

[0126] In this embodiment, during the assembly of the battery device with the electrical equipment or energy storage device, before the mounting beam 30 is fixedly connected to the corresponding side beam 231, the mounting beam 30 is in an unlocked state, causing the mounting beam 30 to reciprocate along the second direction, so that each mounting connector 41 is approximately aligned with the corresponding mating part 401. Then, the mounting beam 30 is fixedly connected to the corresponding side beam 231, and the mounting beam 30 is switched to a locked state. Next, the sleeve 42 is moved to change the relative positional relationship between the sleeve 42 and the mounting hole 311, or the mounting connector 41 is moved within the channel 421 to change the relative positional relationship between the mounting connector 41 and the channel 421, thereby adjusting the position of the mounting connector 41 until each mounting connector 41 is aligned with the corresponding mating part 401, and then the mounting connector 41 and the mating part 401 are fixedly connected.

[0127] Understandably, taking the application of battery devices in electric vehicles as an example, due to the different mounting positions of different vehicle models, and the fact that in related technologies the mounting beam 30 is usually non-detachably connected to the side beam 231 (either integrally formed or welded together), it is difficult for the battery device to be adapted to different electric vehicle models. Thus, the battery device has poor versatility, requiring the design and production of different battery devices for different vehicle models, resulting in high design costs. When the mounting beam 30 deforms or collapses, the entire battery device needs to be disassembled for maintenance or replacement, leading to high repair costs.

[0128] In this embodiment, the mounting beam 30 is detachably connected to the corresponding side beam 231, so that the mounting beam 30 and the side beam 231 are decoupled. The two can be modularized and designed independently. This way, only the design of the mounting beam 30 can be adjusted for different vehicle models, which helps to reduce design costs.

[0129] The technical solution of this embodiment allows the travel of the mounting beam 30 along the second direction to be significantly greater than the travel of the mounting connector 41 along the length of the mounting hole 311 and the travel of the mounting connector 41 along the length of the channel 421. Thus, when the battery device is assembled and fixed to an electrical device or energy storage device, the position of the mounting connector 41 can be adjusted over a large range (i.e., a large adjustment of the position of the mounting connector 41) by moving the mounting beam 30 along the second direction, and then the position of the mounting connector 41 can be adjusted over a small range (i.e., a fine adjustment of the position of the mounting connector 41) using the first and / or second movement gaps. In general, the position of the mounting connector 41 can be flexibly adjusted. This flexible adjustment of the position of the mounting connector 41 makes the battery device of this embodiment applicable to different vehicle models, greatly increasing the versatility of the battery device.

[0130] Moreover, thanks to the detachable connection between the mounting beam 30 and the corresponding side beam 231, when the mounting beam 30 is deformed or crushed, the mounting beam 30 and the side beam 231 can be separated and the mounting beam 30 can be maintained or replaced. This eliminates the need to repair the entire battery device, reducing maintenance costs.

[0131] It is understandable that electric vehicles of similar models may have similar mounting positions, where similar models can be understood as having similar wheelbases and dimensions. Therefore, as can be seen from the preceding text, the position of the mounting connector 41 can be fine-tuned using the first and / or second movable gaps. In this way, by fine-tuning the position of the mounting connector 41, the battery device of this embodiment can be mounted and mated with mating parts of similar vehicle models, meaning that the battery device of this embodiment can be applied to similar vehicle models.

[0132] In the unlocked state, the mounting beam 30 can be reciprocated relative to the corresponding side beam 231 in the second direction in at least the following possible ways.

[0133] Firstly, the battery device may also include an actuator and a transmission mechanism. The actuator is connected to the mounting beam 30 via the transmission mechanism. When the mounting beam 30 is in the unlocked state, the actuator operates to drive the mounting beam 30 to reciprocate in a second direction. The actuator may be, for example, a linear motor, and the transmission mechanism may be a linear guide mechanism. Alternatively, the actuator may be a rotary motor, and the transmission mechanism may be a rack and pinion mechanism or a lead screw and nut mechanism.

[0134] According to some embodiments of this application, such as Figure 4and Figure 5 As shown, the mounting beam 30 may include a protrusion 32, and the side beam 231 is provided with a groove 2315. The groove 2315 extends along the second direction, and the protrusion 32 slides in the groove 2315 of the corresponding side beam 231.

[0135] Of course, in other embodiments of this application, the protrusion 32 can be replaced by being disposed on the side beam 231, and the groove 2315 can be replaced by being disposed on the mounting beam 30, with the side beam 231 of the protrusion 32 and the groove 2315 of the side beam 231 slidingly engaged. The protrusion 32 can be a solid structure or a hollow structure. The shape and size of the protrusion 32 match the shape and size of the groove 2315. For example, taking the section perpendicular to the second direction as the cross-section, the cross-sections of the protrusion 32 and the groove 2315 can be rectangular, circular, polygonal, etc.

[0136] In this embodiment, when the battery device is assembled and fixed to the electrical equipment or energy storage device, the protrusion 32 can be slid into the slide groove 2315 first, and by applying an external force to the mounting beam 30, the mounting beam 30 can slide along the slide groove 2315.

[0137] This embodiment achieves the reciprocating translation of the mounting beam 30 along the second direction by setting the protrusion 32 and the sliding groove 2315 in a sliding fit, using a mechanical structure. The structure is simple and reliable, and no additional drive is required.

[0138] According to some embodiments of this application, in the locked state, the protrusion 32 can be detachably connected to the corresponding side beam 231 via the first fastener 50.

[0139] The first fastener 50 can be implemented as a screw, bolt (e.g., rivet bolt), etc. The first fastener 50 can be... Figure 4 The protrusion 32 and the side beam 231 can be connected from top to bottom, or from bottom to top. In this embodiment, when the mounting beam 30 slides to a suitable position along the second direction, the protrusion 32 and the side beam 231 are connected by the first fastener 50, and the mounting beam 30 is switched to the locked state.

[0140] With this technical solution, the connection and installation of the first fastener 50 with the protrusion 32 and the side beam 231 are simple, which makes it easy to switch the mounting beam 30 between the locked and unlocked states.

[0141] According to some embodiments of this application, such as Figure 4 and Figure 5As shown, the side beam 231 may specifically include a first beam body 2311 and a first reinforcing beam 2312. The first beam body 2311 has a hollow structure, and the first reinforcing beam 2312 is housed within the hollow cavity of the first beam body 2311. The first reinforcing beam 2312 divides at least a portion of the hollow cavity into a first cavity 2314 and a sliding groove 2315, which are sequentially arranged along a first direction. A first fastener 50 passes through the first reinforcing beam 2312 along the first direction and is connected to the corresponding protrusion 32. A first side plate 2311a of the first beam body 2311 is spaced apart from the first reinforcing beam 2312 along the first direction and is located on the side of the first reinforcing beam 2312 opposite to the protrusion 32. The first side plate 2311a has a through hole 2317, the axis of which is parallel to the first direction. The orthographic projection of the first fastener 50 along the first direction onto the first side plate 2311a can fall within the through hole 2317.

[0142] The first beam body 2311 has a hollow structure, which helps to reduce the weight of the box body 20. On this basis, the setting of the first reinforcing beam 2312 can improve the structural strength of the side beam 231. The first reinforcing beam 2312 can extend along the second direction.

[0143] In some examples, the first reinforcing beam 2312 can divide the entire hollow cavity into a first cavity 2314 and a slide 2315. The slide 2315 is further away from the interior of the housing 20 than the first cavity 2314. In this example, the two ends of the first reinforcing beam 2312 along the third direction are connected to the top plate and bottom plate 2311b of the first beam body 2311, respectively. The top plate and bottom plate 2311b are arranged opposite to each other along the third direction. The first reinforcing beam 2312 is provided with a first connecting hole 2318, and the protrusion 32 is provided with a second connecting hole 321. The first connecting hole 2318 and the second connecting hole 321 are coaxially arranged and connected by a first fastener 50.

[0144] In some examples, the side beam 231 may also include a second reinforcing beam 2313, which is housed within the hollow cavity of the first beam body 2311. The second reinforcing beam 2313 and the first reinforcing beam 2312 together divide the entire hollow cavity into a first cavity 2314, a groove 2315, and a second cavity 2316. The second reinforcing beam 2313 is located on one side of the first reinforcing beam 2312 along a third direction, and the second cavity 2316 is located on one side of the first cavity 2314 and the groove 2315 along a third direction. Figure 4 and Figure 5 As shown, there are two second reinforcing beams 2313, which are located above and below the first reinforcing beam 2312 respectively. Correspondingly, the hollow cavity is divided into a first cavity 2314, a groove 2315 and two second cavities 2316.

[0145] Along the first direction, the first reinforcing beam 2312 is located between the first side plate 2311a and the protrusion 32, with the first side plate 2311a facing the interior of the housing 20. The first side plate 2311a has a through hole 2317, which is directly opposite to the first connecting hole 2318 and the second connecting hole 321. The diameters of the first connecting hole 2318 and the second connecting hole 321 are both smaller than the diameter of the through hole 2317. The statement that "the orthographic projection of the first fastener 50 along the first direction onto the first side plate 2311a can fall within the through hole 2317" indicates that the first fastener 50 can pass through the through hole 2317 along the first direction.

[0146] Taking the second housing 22 as an example with an opening on one side and the mounting beam 30 installed in the second housing 22, during assembly, the protrusion 32 can be slid into the groove 2315. When the protrusion 32 reaches the appropriate position, the mounting connector 41 is roughly aligned with the corresponding mating part 401. The protrusion 32 is moved so that the first connecting hole 2318 and the second connecting hole 321 are aligned. Then, the first fastener 50 can be moved into the second housing 22 and aligned with the through hole 2317, the first connecting hole 2318 and the second connecting hole 321. The first fastener 50 moves from the inside of the second housing 22 to the outside of the second housing 22 along the first direction. The first fastener 50 passes through the through hole 2317, and then the first fastener 50 is connected to the first connecting hole 2318 and the second connecting hole 321.

[0147] It is understandable that in the technical solution where the first fastener 50 passes sequentially through the first side plate 2311a, the first reinforcing beam 2312, and the protrusion 32, and the protrusion 32 is fixedly connected to both the first side plate 2311a and the first reinforcing beam 2312 via the first fastener 50, the first side plate 2311a also participates in bearing the force, resulting in a long force chain, as the mounting beam 30 is connected to the first reinforcing beam 2312 of the side beam 231 via the first fastener 50. However, in this embodiment, the first fastener 50 is not connected to the first side plate 2311a, shortening the force chain and reducing the possibility of deformation of the first side plate 2311a under stress.

[0148] In some embodiments, the head of the first fastener 50 can be accommodated within the hollow cavity of the side beam 231, specifically within the first cavity 2314. In this embodiment, the head of the first fastener 50 does not occupy the internal space of the housing 20.

[0149] Please refer to some embodiments of this application. Figure 4 and Figure 5The battery assembly may also include angle connectors 80, with each mounting beam 30 corresponding to at least one angle connector 80. Each mounting beam 30 also includes a second beam body 31, which, in the locked state, protrudes from the corresponding side beam 231 on the side facing away from the interior of the housing 20 along a first direction, and the second beam body 31 is detachably connected to the corresponding side beam 231 via at least one angle connector 80.

[0150] The second beam body 31 is connected to the protrusion 32. The second beam body 31 can be a solid structure or a hollow structure. In this embodiment, the second beam body 31 is provided with a mounting hole 311, and the mounting assembly 40 is installed on the second beam body 31. When the mounting beam 30 includes the protrusion 32 and the side beam 231 is provided with a groove 2315, the groove 2315 has an opening on the side away from the first reinforcing beam 2312 along the first direction. The second beam body 31 extends out of the groove 2315 through the opening from the protrusion 32, and the protrusion 32 cannot pass through the opening. The opening ensures that the mounting beam 30 does not interfere with the side beam 231, so that it can slide in the groove 2315.

[0151] An angled connector 80 is a structural component with two or more mutually angled connecting surfaces, used to connect two parts. The angled connector 80 is disposed between the side beam 231 and the second beam body 31. The angled connector 80 can be a standard part or a non-standard part. The angled connector 80 can be a sheet metal structure, a cast structure, a welded structure, a forged structure, etc. In some embodiments, the angled connector 80 includes a first plate 81 and a second plate 82 arranged at an angle. The first beam body 2311 has a third connecting hole 2319, and the first plate 81 has a fourth connecting hole 811. The third connecting hole 2319 and the fourth connecting hole 811 are coaxially arranged, and their central axes both extend along a first direction. A second fastener 60 cooperates with the third connecting hole 2319 and the fourth connecting hole 811, allowing the first plate 81 and the first beam body 2311 to be detachably connected. The second beam body 31 is provided with a fifth connecting hole 313, which penetrates the second beam body 31 along a third direction. The second plate 82 is provided with a sixth connecting hole 821. The fifth connecting hole 313 and the sixth connecting hole 821 are coaxially arranged, and their central axes both extend along a third direction. The third fastener 70 cooperates with the fifth connecting hole 313 and the sixth connecting hole 821, so that the second plate 82 and the second beam body 31 are detachably connected. The second fastener 60 and the third fastener 70 can be implemented as screws, bolts (e.g., rivet bolts), etc.

[0152] Each mounting beam 30 can correspond to an angle connector 80, or, as... Figure 4As shown, each mounting beam 30 can correspond to two angular connectors 80, which are located on both sides of the second beam body 31 along a third direction, i.e., the two angular connectors 80 are located on the upper and lower sides of the second beam body 31, respectively. Figure 4 In the case where the upper and lower sides of the second beam body 31 are provided with angled connectors 80, the third fastener 70 can pass through the second plate 82 of the upper angled connector 80, the second beam body 31, and the second plate 82 of the lower angled connector 80 in sequence.

[0153] In this embodiment, by setting the angle connector 80, in the locked state, the mounting beam 30 is not only directly connected to the side beam 231 through the first fastener 50, but also indirectly connected to the side beam 231 through the angle connector 80. This improves the connection reliability between the mounting beam 30 and the side beam 231, and thus helps to improve the load-bearing reliability of the mounting beam 30.

[0154] According to some embodiments of this application, two mounting beams 30 can form a mounting beam group, and multiple mounting beam groups can be provided and multiple mounting beam groups are arranged sequentially at intervals along the second direction.

[0155] The number of mounting beam groups can be reasonably designed according to the dimensions of the side beam 231 along the second direction. For example, if the dimension of the side beam 231 along the second direction is 1.5m, there can be 6 mounting beam groups.

[0156] In one specific embodiment, the mounting beam 30 has a locked state and an unlocked state. In the locked state, the mounting beam 30 is connected to the corresponding side beam 231 via a first fastener 50. In the unlocked state, the mounting beam 30 can reciprocate relative to the corresponding side beam 231 along a second direction, and the movable distance of the mounting beam 30 along the second direction is L1. The dimension of the first movable gap along the length direction of the mounting hole 311 is L2, and the dimension of the second movable gap along the length direction of the channel 421 is L3. In this embodiment, the side beam 231 is provided with N first connecting holes 2318 evenly and spaced along the second direction. The straight-line distance between two adjacent first connecting holes 2318 along the second direction is L4, and L2 and L3 can be greater than or equal to L4. This arrangement allows the connector to be adjusted between two adjacent positions of the mounting beam 30, thereby better compensating for the fitting error between the mounting connector 41 and the mating part 401.

[0157] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0158] The electrical equipment includes vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc. It is understood that the electrical equipment provided in this application, by employing any of the aforementioned battery devices, possesses all the beneficial effects of those battery devices, which will not be elaborated further here.

[0159] Taking an electric vehicle as an example, the first direction can be parallel to the direction of travel of the electric vehicle, and the second direction can be perpendicular to the direction of travel of the electric vehicle, or the first direction can be perpendicular to the direction of travel of the electric vehicle, and the second direction can be parallel to the direction of travel of the electric vehicle.

[0160] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device described in the above embodiments, the battery device being used for energy storage.

[0161] Energy storage devices can include, but are not limited to, centralized energy storage devices (such as containerized energy storage devices), distributed energy storage devices, mobile energy storage devices, wearable energy storage devices, and so on.

[0162] It is understood that the energy storage device provided in this application, by using any of the aforementioned battery devices, has all the beneficial effects of the aforementioned battery devices, which will not be elaborated here.

[0163] 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.

[0164] A specific embodiment of this application is described below. It should be understood that this specific embodiment is described for illustrative purposes only and should not be construed as limiting the scope of this application.

[0165] like Figure 4 and Figure 5As shown, the battery device includes a housing 20, multiple mounting beam groups, and multiple mounting components 40. The housing 20 includes two side beams 231 arranged opposite each other along a first direction. The two side beams 231 extend along a second direction and are provided with sliding grooves 2315 extending along the second direction. The multiple mounting beam groups are arranged sequentially at intervals along the second direction. Each mounting beam group includes two mounting beams 30 arranged at intervals along the first direction. Each mounting beam 30 includes a connected second beam body 31 and a protrusion 32, which slides in the sliding grooves 2315 of the side beam 231. The mounting beams 30 have a locked state and an unlocked state. In the locked state, the mounting beam 30 is detachably connected to the corresponding side beam 231. In the unlocked state, the mounting beam 30 can reciprocate relative to the corresponding side beam 231 along the second direction, and the movable distance of the mounting beam 30 along the second direction is L1. Each mounting beam 30 is provided with a mounting hole 311, which penetrates the mounting beam 30 along a third direction. The first direction and the second direction are perpendicular to each other with the third direction. The mounting hole 311 is waist-shaped, and the length direction of the mounting hole 311 is parallel to the second direction.

[0166] Multiple mounting components 40 correspond one-to-one with multiple mounting holes 311. Each mounting component 40 includes a mounting bolt and a sleeve 42. The sleeve 42 is inserted into the mounting hole 311, with a first movable gap between the sleeve 42 and the hole wall of the mounting hole 311. The mounting bolt passes through a channel 421 in the sleeve 42 to connect with a nut on the frame of the electric vehicle. The channel 421 has an oblong cross-section perpendicular to its axial direction, and the length direction of the channel 421 is parallel to a first direction. A second movable gap exists between the mounting bolt and the inner circumferential surface of the channel 421. The first movable gap has a dimension L2 along the second direction, and the second movable gap has a dimension L3 along the first direction. L1, L2, and L3 are configured to allow the mounting beam 30 to move a long distance relative to the side beam 231 along the second direction in the unlocked state, and the mounting bolt can be finely adjusted relative to the mounting beam 30.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; Two mounting beams are connected to the two ends of the box body along the first direction. Each of the two mounting beams extends along the second direction and is provided with mounting holes. The mounting holes penetrate the mounting beam along the third direction. The first direction, the second direction and the third direction are perpendicular to each other. Multiple mounting components correspond one-to-one with multiple mounting holes; each mounting component includes a mounting connector and a sleeve, the sleeve being inserted into the corresponding mounting hole, the central axis of the sleeve being parallel to the third direction, and the mounting connector passing through the channel of the sleeve for detachable connection with a mating component of an electrical device or energy storage device; along the length direction of the mounting hole, there is a first movable gap between the hole wall and the corresponding sleeve; along the length direction of the channel, there is a second movable gap between the inner peripheral wall of the channel and the corresponding mounting connector; the length direction of the mounting hole intersects the length direction of the channel.

2. The battery device according to claim 1, characterized in that, The sleeve is connected to a flange at one end along the third direction, and the flange is arranged along the circumference of the sleeve; the mounting beam has a first surface and a second surface arranged opposite to each other along the third direction, and the first surface faces the mating member; When the mounting connector is connected to the mating part, the flange contacts the first surface; The first surface is provided with a plurality of limiting grooves corresponding to a plurality of preset positions around each of the mounting holes; at each of the plurality of preset positions, the flange is adapted to the corresponding limiting groove.

3. The battery device according to claim 1, characterized in that, The sleeve is slidably engaged with the corresponding mounting hole, and when the mounting connector is separated from the engaging component, the sleeve can slide along the mounting hole; The mounting beam is provided with a first connecting part, and the sleeve is provided with a second connecting part. The first connecting part cooperates with the second connecting part of the corresponding mounting beam to restrict the rotational freedom of the sleeve about its own central axis, and the second connecting part has a degree of freedom of movement along the length direction of the corresponding mounting hole relative to the first connecting part.

4. The battery device according to claim 3, characterized in that, The first connecting part is a screw connector, and the second connecting part is a protrusion that connects to the outer peripheral surface of the sleeve. The protrusion is screwed to the corresponding mounting beam through the screw connector, and the extension direction of the screw connector is parallel to the length direction of the mounting hole.

5. The battery device according to any one of claims 1 to 4, characterized in that, The mounting hole is an oblong hole, the hole wall of which includes two arc-shaped walls arranged opposite each other along the length of the oblong hole; the sleeve is cylindrical, and the radius of the outer circumference of the sleeve is equal to the radius of the arc of the arc-shaped wall; and / or, With a cross section perpendicular to the third direction as the cross section, the cross section shape of the channel is waist-shaped, the cross section shape of the mounting connector is circular, and the inner peripheral wall of the channel includes two arc-shaped surfaces arranged opposite each other along the length direction of the channel. The arc-shaped surfaces are adapted to the mounting connector. When the mounting connector is separated from the mating part, the mounting connector can slide along the channel.

6. The battery device according to any one of claims 1 to 4, characterized in that, The length direction of the mounting hole is parallel to the first direction, or the length direction of the mounting hole is parallel to the second direction, or the length direction of the mounting hole is inclined to both the first direction and the second direction.

7. The battery device according to any one of claims 1 to 4, characterized in that, The housing includes two side beams arranged opposite each other along the first direction. The two side beams extend along the second direction and correspond one-to-one with the two mounting beams. The mounting beams have a locked state and an unlocked state. In the locked state, the mounting beams are detachably connected to the corresponding side beams. In the unlocked state, the mounting beams can reciprocate relative to the corresponding side beams along the second direction, and the movable distance of the mounting beams along the second direction is L1. The dimension of the first movable gap along the length direction of the mounting hole is L2, and the dimension of the second movable gap along the length direction of the channel is L3. L1 / L2∈[5, 15], L1 / L3∈[5, 15].

8. The battery device according to claim 7, characterized in that, The mounting beam includes a protrusion, and the side beam is provided with a sliding groove that extends along the second direction. The protrusion slides onto the corresponding sliding groove of the side beam.

9. The battery device according to claim 8, characterized in that, In the locked state, the protrusion is detachably connected to the corresponding side beam via a first fastener.

10. The battery device according to claim 9, characterized in that, The side beam includes a first beam body and a first reinforcing beam. The first beam body is a hollow structure. The first reinforcing beam is housed in the hollow cavity of the first beam body. The first reinforcing beam divides at least part of the hollow cavity into a first cavity and the sliding groove. The first cavity and the sliding groove are arranged sequentially along the first direction. The first fastener passes through the first reinforcing beam along the first direction and connects to the corresponding protrusion. The first side plate of the first beam body is spaced apart from the first reinforcing beam along the first direction and is located on the side of the first reinforcing beam away from the protrusion. The first side plate has a through hole, the axis of which is parallel to the first direction. The first fastener's orthogonal projection along the first direction onto the first side plate falls within the through hole.

11. The battery device according to claim 7, characterized in that, The battery device further includes an angle connector, and each mounting beam corresponds to at least one of the angle connectors; the mounting beam includes a second beam body, and in the locked state, the second beam body protrudes from the side of the corresponding side beam away from the inside of the box along the first direction, and the second beam body is detachably connected to the corresponding side beam through at least one of the angle connectors.

12. The battery device according to any one of claims 1 to 4, characterized in that, The two mounting beams form a mounting beam group, and the mounting beam group has multiple beams arranged at intervals along the second direction.

13. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1 to 12, the battery device being used to provide electrical energy.

14. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1 to 12, the battery device being used to store electrical energy.

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