Battery device and electric device

Abstract

The utility model discloses a battery device and an electric device. The battery device comprises a first expansion beam, a box body, a battery monomer, a heat management assembly, a reinforcing beam and a mounting beam, the installation beam is installed on the box body and provided with a notch in a penetrating mode. The first expansion beam is mounted in the box body through the mounting beam and is matched with the battery monomers, and the first expansion beam, the mounting beam and the bottom wall of the box body jointly define an avoiding channel communicated with the notch; the heat management assembly comprises an inlet part and an outlet part; at least one of the inlet part and the outlet part is arranged in the avoiding channel in a penetrating manner; the box body further comprises a reinforcing beam arranged at the notch, and the reinforcing beam is connected with the wall bodies, located on the two sides of the notch, of the installation beam and connected with the first expansion beam. The reinforcing beam, the mounting beam and the first expansion beam can form a continuous structure, and the reinforcing beam can be matched with the mounting beam to jointly support the first expansion beam, so that the stability of the first expansion beam is higher, the force is dispersed, and the capacity of the first expansion beam for resisting the expansion force of the single battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] In a battery device, an expansion beam is designed to be located on one side of a battery cell with respect to the battery cell, so as to bear and control the pressure generated by the expansion of the battery cell, and prevent the box body from deforming or being damaged. In the related art, due to limitations in the elastic modulus, geometric shape, or connection method of the material, the expansion beam may not be able to effectively disperse and absorb the force generated by the expansion of the battery cell, which may cause the expansion beam itself to deform and even malfunction. Therefore, the overall anti-expansion ability of the expansion beam against the battery cell is low. Summary of the Utility Model

[0003] The utility model provides a battery device and an electric device to solve at least one of the above-mentioned technical problems.

[0004] The battery device according to an embodiment of the utility model includes a box body, a battery cell, a mounting beam, a first expansion beam, and a thermal management component. The battery cell is disposed in the box body; the mounting beam is mounted on the box body and has a notch formed therethrough; the first expansion beam is mounted in the box body through the mounting beam and cooperates with the battery cell, and the first expansion beam, the mounting beam, and the bottom wall of the box body jointly define an avoidance channel communicating with the notch; the thermal management component is disposed in the box body and is in heat exchange cooperation with the battery cell, and the thermal management component includes an inlet portion and an outlet portion; at least one of the inlet portion and the outlet portion penetrates through the avoidance channel.

[0005] Wherein, the battery device further includes a reinforcing beam disposed at the notch, and the reinforcing beam is connected to the wall bodies on both sides of the notch of the mounting beam and is connected to the first expansion beam.

[0006] In the battery device according to an embodiment of the utility model, the reinforcing beam, the mounting beam, and the first expansion beam can form a continuous structure, and the reinforcing beam can cooperate with the mounting beam to jointly support the first expansion beam, so that the stability of the first expansion beam is relatively high. This can effectively disperse the expansion force exerted by the battery cell on the first expansion beam, avoid excessive local stress on the first expansion beam, make the force distribution more uniform, and thus improve the ability of the first expansion beam to resist the expansion force of the battery cell.

[0007] In addition, the avoidance channel can provide space for the inlet portion or the outlet portion of the thermal management component, thereby improving the overall space utilization rate of the battery device.

[0008] In some embodiments, the reinforcing beam is horizontally disposed at the notch and is connected to the wall bodies on both sides of the notch of the mounting beam.

[0009] In this way, the occupied space of the reinforcing beam is small, which is beneficial to improving the space utilization rate of the battery device.

[0010] In some embodiments, the reinforcing beam covers the notch and is connected to the wall bodies on both sides of the mounting beam near the notch.

[0011] In this way, the connection area between the reinforcing beam and the mounting beam is large, which can improve the stability of the reinforcing beam itself, enable the reinforcing beam to stably support the first expansion beam, and thus improve the ability of the first expansion beam to resist the expansion force of the battery cell.

[0012] In some embodiments, the reinforcing beam includes a first reinforcing portion and a second reinforcing portion connected at an angle. The first reinforcing portion is connected to the mounting beam, and the second reinforcing portion is connected to the first expansion beam.

[0013] In this way, due to the angle setting of the first reinforcing portion and the second reinforcing portion, the reinforcing beam can provide additional support when connected to the mounting beam and the first expansion beam, increasing the rigidity of the overall structure of the reinforcing beam, the mounting beam and the first expansion beam, helping to improve the stability and torsional resistance of the overall structure, and thus improving the ability of the first expansion beam to resist the expansion force of the battery cell.

[0014] In addition, the first reinforcing portion and the second reinforcing portion connected at an angle make the reinforcing beam have a large installation space, which facilitates the connection between the reinforcing beam and the mounting beam and the first expansion beam.

[0015] In some embodiments, the mounting beam includes a first beam, a second beam and a third beam connected at an angle in sequence. The first beam and the third beam are both connected to the bottom wall of the box body. The first beam is closer to the battery cell than the third beam. The first reinforcing portion is connected to the third beam, and the second reinforcing portion is connected to the second beam.

[0016] In this way, due to the angle setting of the first beam, the second beam and the third beam, a frame structure can be formed between the mounting beam and the bottom wall of the box body, which can increase the structural strength of the mounting beam, thus improving the stability between the mounting beam and the first expansion beam and the reinforcing beam, and further improving the ability of the first expansion beam to resist the expansion force of the battery cell.

[0017] In addition, the first beam, the second beam and the third beam connected at an angle make the mounting beam have a large installation space, which facilitates the connection between the mounting beam and the reinforcing beam and the first expansion beam.

[0018] In some embodiments, the number of the notches is one or more. When the number of the notches is multiple, the number of the mounting beams is multiple and corresponds to the multiple notches one by one.

[0019] In this way, multiple mounting beams can provide multiple support points, thereby dispersing the force on the first expansion beam and enhancing the ability of the first expansion beam to resist the expansion force of the battery cell.

[0020] In some embodiments, when the number of the notches is multiple, the number of the mounting beams is one, and one mounting beam faces multiple notches.

[0021] In this way, the notches can be formed on one mounting beam, which facilitates the manufacturing of the mounting beam and is beneficial to reducing the manufacturing cost.

[0022] In some embodiments, the heat management component is formed by bending a heat exchange tube, and the inlet part and the outlet part of the heat exchange tube are arranged adjacent to each other, so that both the inlet part and the outlet part of the heat exchange tube penetrate through the notch.

[0023] In this way, the heat management component is formed by bending the heat pipe, which can increase the contact area between the battery cell and the heat management component, thereby enhancing the heat exchange effect between the heat management component and the battery cell.

[0024] In addition, the notch can provide a channel for the inlet part and the outlet part, which is beneficial to the layout of the heat management component.

[0025] In some embodiments, the number of the heat exchange tubes is multiple, and multiple inlet parts and multiple outlet parts of the multiple heat exchange tubes are concentrated and arranged adjacent to each other, and commonly penetrate through one notch.

[0026] In this way, the occupied space of the heat exchange tubes is small, which is beneficial to improving the space utilization rate of the battery device.

[0027] In some embodiments, the number of the heat exchange tubes is multiple, and the number of the notches is also multiple, and the inlet part and the outlet part of each heat exchange tube penetrate through one notch.

[0028] In this way, the inlet part and the outlet part of each heat exchange tube are independently arranged, which can reduce the interference between adjacent or close inlet parts or outlets, and is convenient for maintaining the inlet part and the outlet part.

[0029] In some embodiments, the heat exchange tube gradually extends from the outer periphery of the battery device towards the middle position of the battery device and is bent.

[0030] In this way, the contact area between the heat exchange tube and the battery cell is large, which can enhance the heat exchange effect between the heat exchange tube and the battery cell.

[0031] In some embodiments, the number of the heat exchange tubes is multiple and they are arranged in parallel.

[0032] In this way, interference is not likely to occur between multiple heat exchange tubes.

[0033] In some embodiments, an installation groove is formed on the bottom wall, and the heat exchange tube is disposed in the installation groove and extends along the extension direction of the installation groove.

[0034] In this way, the arrangement of the installation groove can facilitate the layout of the heat exchange tube, reduce the space occupied by the heat exchange tube inside the box body, compact the structure, and improve the energy density of the battery device.

[0035] In some embodiments, the first expansion beam includes a plurality of plate bodies, and all of the plurality of plate bodies are sheet metal parts, and the plurality of plate bodies are welded together to form the first expansion beam.

[0036] In this way, since the plurality of plate bodies are welded to each other to form an integral first expansion beam, the structure of the first expansion beam can be simplified, the processing and forming of the first expansion beam can be facilitated, and the cost can be reduced; at the same time, the plate body is set as a sheet metal part, which can improve the structural strength of the plate body and the structural strength of the first expansion beam.

[0037] In some embodiments, the first expansion beam includes a plurality of plate bodies connected together, and the plurality of plate bodies respectively include: a first plate and a second plate, the first plate and the second plate extend along a first direction and are arranged in a second direction, and in a third direction, two ends of the first plate are respectively connected to two ends of the second plate, and cooperate to define a cavity of the first expansion beam, and the first direction, the second direction, and the third direction intersect pairwise.

[0038] In this way, since the plurality of plate bodies include a first plate and a second plate, and the first plate and the second plate are connected and define a cavity of the first expansion beam, the composition structure of the first expansion beam can be simplified, the processing can be facilitated, and the cost can be reduced.

[0039] In some embodiments, in the third direction, two ends of the first plate have a first flanging and a second flanging extending towards the second plate, and two ends of the second plate have a third flanging and a fourth flanging extending towards the first plate, the first flanging is overlapped and connected with the third flanging, and the second flanging is overlapped and connected with the fourth flanging.

[0040] In this way, since the first flanging and the second flanging of the first plate are respectively overlapped and connected with the third flanging and the fourth flanging of the second plate, the structure is simple, the welding connection between the first plate and the second plate can be facilitated, the structural strength of the welding position can be improved, and the structural strength of the first expansion beam can be improved.

[0041] In some embodiments, the second plate includes a main plate and a support plate which are separately arranged, the main plate being arranged on a side of the support plate away from the bottom wall in the third direction, the main plate being provided with a first folded edge extending away from the second plate along the second direction, the support plate being provided with a second folded edge extending away from the second plate along the second direction, the first folded edge and the second folded edge being stacked and connected.

[0042] In this way, by making the second plate include a separately arranged main board and a support plate, the production difficulty of the second plate can be reduced and the processing efficiency can be improved; at the same time, by connecting the main board and the support plate through lap welding of the first folded edge and the second folded edge respectively, the structural strength of the second plate can be improved, and the welding connection of the main board and the support plate can be facilitated.

[0043] In some embodiments, the first folded edge is formed with a plurality of first fixing holes passing through the first folded edge along the third direction, the plurality of first fixing holes are arranged at intervals along the first direction, the first expansion beam is connected to the mounting beam by fasteners passing through a portion of the first fixing holes, and the first expansion beam is connected to the reinforcing beam by fasteners passing through another portion of the first fixing holes.

[0044] In this way, the first folded edge is provided with a plurality of first fixing holes for fastening connection with the mounting beam, thereby making it convenient to connect the first expansion beam with the mounting beam and the reinforcing beam through fasteners, and the plurality of first fixing holes can improve the reliability of the connection between the first expansion beam and the mounting beam and the reinforcing beam and the uniformity of force.

[0045] In some embodiments, the first folded edge includes a plurality of connecting portions and a plurality of recessed portions, the plurality of recessed portions are alternately arranged and connected with the plurality of connecting portions along the first direction, the recessed portions are formed by the first folded edge being recessed toward the support plate, and each of the recessed portions is formed with at least one first fixing hole.

[0046] The second folding edge includes a plurality of first lugs extending away from the first plate along the second direction, the plurality of first lugs are arranged at intervals along the first direction, and an escape portion is defined between two adjacent first lugs.

[0047] Wherein, the recessed portion is located in the avoiding portion, and the plurality of connecting portions correspond to and are connected to the plurality of first lugs one by one.

[0048] Thus, since a plurality of recesses are formed on the first folded edge, the plurality of recesses can improve the structural strength of the first folded edge and enhance the reliability when the first folded edge is connected to the box body. At the same time, since the recesses are located within the avoidance portion, the first lug can be flush with the lower surface of the recess or the recess can protrude from the lower surface of the first lug, so that the recess can abut against the connected components when connected to the mounting beam, thereby improving the reliability of the fastening connection.

[0049] In some embodiments, on one side edge of the support plate facing away from the main board in the third direction, a first avoidance groove recessed toward the main board is formed, and the reinforcing beam is formed with a second avoidance groove. The first avoidance groove and the second avoidance groove are arranged at intervals in the second direction, and both the first avoidance groove and the second avoidance groove are used to avoid the inlet portion and the outlet portion.

[0050] Thus, by providing the first avoidance groove and the second avoidance groove on the support plate and the reinforcing beam respectively for avoiding the inlet portion and the outlet portion of the heat exchange tube, the mutual interference between the support plate and the inlet portion and the outlet portion can be reduced, and the layout can be made more compact and reasonable.

[0051] In some embodiments, the plurality of plate bodies further include a reinforcing plate, the reinforcing plate extends along the first direction, the reinforcing plate is disposed between the first plate and the second plate, and is connected to the first plate and the second plate.

[0052] Thus, by providing a reinforcing plate between the first plate and the second plate, the reinforcing plate can enhance the overall structural strength of the first expansion beam and improve the anti-expansion effect on the battery cell.

[0053] In some embodiments, the reinforcing plate includes a flat portion and a bent portion. The flat portion is attached to and connected to the surface of the first plate, and the bent portion is connected to the flat portion and forms a U-shaped structure extending along the first direction and opening toward the first plate in the second direction.

[0054] Thus, by making the reinforcing plate include a flat portion connected to the first plate and a bent portion protruding and bent toward the second plate, not only can the reinforcing plate be conveniently welded to the first plate and the second plate, but also the structural strength of the reinforcing plate can be improved, and the overall strength of the first expansion beam can be enhanced.

[0055] In some embodiments, the number of the bent portions is multiple, and the multiple bent portions are arranged at intervals in the third direction. The flat portion is connected between two adjacent bent portions and is connected to both sides of the multiple bent portions in the third direction.

[0056] Thus, by providing a plurality of bending portions on the reinforcing plate, the structural strength of the reinforcing plate can be further enhanced, the structural strength of the first expansion beam can be enhanced, and the uniformity of the structural reinforcement of the first plate and the second plate in the height direction of the first expansion beam can be improved, reducing the strength weak area of the first expansion beam.

[0057] In some embodiments, the reinforcing plate further includes a third hem, the third hem is connected to the flat plate portion, the third hem has a plurality of second lugs extending away from the first plate along the second direction, the plurality of second lugs are arranged at intervals along the first direction, the plurality of second lugs are clamped between the first hem and the second hem, and are welded to the first hem and the second hem.

[0058] Thus, since the reinforcing plate is further provided with a third hem, and the third hem is connected between the first hem and the second hem, the third hem can enhance the connection strength at the connection position of the first hem and the second hem, improve the reliability of the fastening connection between the first hem and the box body. At the same time, the plurality of second lugs arranged at intervals can define a relief hole for relieving the recess of the first hem, reducing the probability of interference between the third hem and the fastener passing through the first fixing hole.

[0059] In some embodiments, the battery device further includes a first connecting plate and a second connecting plate. The first connecting plate is fixed to the side wall of the box body by a fastener. Both ends of the first plate in the first direction are provided with first connection holes penetrating the first plate in the second direction. The first plate is fixedly connected to the first connecting plate by a fastener passing through the first connection holes. The second connecting plate is fixed to the side wall of the box body by a fastener. Both ends of the second plate in the first direction are provided with second connection holes penetrating the second plate in the second direction. The second plate is fixedly connected to the second connecting plate by a fastener passing through the second connection holes.

[0060] Thus, both sides of the first expansion beam in the thickness direction are fixed to the inner wall of the box body by the first connecting plate and the second connecting plate respectively. Thereby, not only can the fastening connection between the first expansion beam and the box body be conveniently realized, but also the connection reliability between the first expansion beam and the box body can be improved.

[0061] In some embodiments, the battery device further includes a bracket, the bracket is fixed to the bottom wall and is arranged at the notch, and the reinforcing beam is supported on the bracket.

[0062] Thus, the bracket can improve the stability of the reinforcing beam, thereby enhancing the structural strength of the first expansion beam, and further enhancing the ability of the first expansion beam to resist the expansion force of the battery cell.

[0063] In some embodiments, the bracket includes a support plate and a plurality of legs. The plurality of legs are arranged circumferentially along the support plate. Each leg includes a support section and an extension section arranged in an L shape. The support section is connected to the bottom wall, and the extension section extends away from the support section in a third direction. The support plate is connected to one end of the extension sections of the plurality of legs that is away from the support section. The reinforcing beam is supported on the support plate and fixed to the support plate by fasteners.

[0064] Thus, since the bracket includes a support plate and a plurality of legs supporting the support plate, the structure of the bracket can be simplified, the support stability of the bracket for the reinforcing beam can be improved, and it is convenient to fixedly connect the reinforcing beam to the bracket.

[0065] In some embodiments, the battery device further includes a second expansion beam. The second expansion beam extends in a first direction and is arranged at an interval from the first expansion beam in a second direction. The battery cells are arranged between the first expansion beam and the second expansion beam. The structure of the second expansion beam is the same as or different from that of the first expansion beam.

[0066] Thus, since the battery device further includes a second expansion beam, the second expansion beam can cooperate with the first expansion beam to jointly inhibit the expansion of the battery cells in the second direction.

[0067] The electrical device according to the embodiment of the present invention includes the battery device according to any one of the above embodiments.

[0068] Since the electrical device includes the above-mentioned battery device, it at least includes all the beneficial effects of the above battery device, which will not be elaborated here.

[0069] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0071] Figure 1 is a schematic structural diagram of an electrical device provided by some embodiments of the present invention;

[0072] Figure 2 is a first schematic structural diagram of a battery device provided by some embodiments of the present invention;

[0073] Figure 3 is a second schematic structural diagram of a battery device provided by some embodiments of the present invention;

[0074] Figure 4It is the third structural schematic diagram of the battery device provided by some embodiments of the present utility model;

[0075] Figure 5 is Figure 2 an enlarged view of part a of the battery device;

[0076] Figure 6 It is the fourth structural schematic diagram of the battery device provided by some embodiments of the present utility model;

[0077] Figure 7 is Figure 6 an enlarged view of part b of the battery device;

[0078] Figure 8 It is the fifth structural schematic diagram of the battery device provided by some embodiments of the present utility model;

[0079] Figure 9 It is the structural schematic diagram of the first expansion beam provided by some embodiments of the present utility model;

[0080] Figure 10 is Figure 9 the disassembly schematic diagram of the first expansion beam.

[0081] Explanation of reference numerals:

[0082] Electrical device 1A; Battery device 1000; Controller 2000; Motor 3000; First expansion beam 100; Box body 200; Side wall 201 of the box body; Bottom wall 202 of the box body; Battery cell 300; Thermal management component 400; Reinforcing beam 500; Mounting beam 600; Notch 610; Avoidance channel 203; Heat exchange tube 410; Inlet part 411; Outlet part 412; Current collector 420; First strengthening part 510; Second strengthening part 520; First beam 620; Second beam 630; Third beam 640; Mounting groove 204; First plate 10; Second plate 20; First flanging 11; Second flanging 12; Third flanging 211; Fourth flanging 221; Main board 21; Support plate 22; First folding edge 212; Second folding edge 222; First fixing hole 2121; Connecting part 2123; Concave part 2122; First lug 2221; Avoidance part 2222; First avoidance groove 223; Second avoidance groove 530; Reinforcing plate 30; Flat plate part 31; Bending part 32; Third folding edge 33; Second lug 331; First connecting plate 1001; First connecting hole 13; Second connecting plate 1002; Second connecting hole 213; Bracket 650; Support plate 651; Leg 652; Support section 6520; Extension section 6521; Second expansion beam 700; Adhesive layer 800. Detailed implementation manners

[0083] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0084] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0085] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0086] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0087] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0088] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in many fields such as aerospace. With the continuous expansion of the battery application field, the market demand is also continuously increasing.

[0089] During the charge and discharge process, the battery cell may undergo volume changes. Especially after high temperature or long-term use, this expansion phenomenon is particularly obvious. To cope with the expansion of the battery cell, the concept of an expansion beam is introduced in related technologies. The expansion beam is designed to maintain a certain distance from the battery cell, be located on one side of the battery cell, and be connected to the side wall of the box body to withstand and control the pressure generated by the expansion of the battery cell and prevent the box body from deforming or being damaged.

[0090] However, due to limitations in the elastic modulus, geometric shape, or connection method of the material, the expansion beam may not be able to effectively disperse and absorb the force generated by the expansion of the battery cell, which may cause deformation of the expansion beam itself and even functional failure. Therefore, the overall anti-expansion ability of the expansion beam against the battery cell is relatively low. Moreover, with the adjustment of the internal structure layout of the battery device, it is often difficult to directly set the expansion beam on the bottom wall, which poses a severe challenge to the overall anti-expansion ability of the expansion beam against the battery cell. For example, in order to enable the battery cell to operate under suitable temperature conditions, a thermal management component is provided in the box body of the battery device. The thermal management component needs to be connected to an external structure to supplement the coolant. To avoid the thermal management component, the structural stability of the expansion beam will also be affected.

[0091] To solve the above technical problem, that is, how to improve the overall anti-cell-swelling force of the swelling beam, an improved design solution for the battery device is proposed in the embodiments of the present utility model. In the battery device of the embodiments of the present utility model, a mounting beam is provided between the bottom wall and the swelling beam to enhance the stability of the swelling beam. The mounting beam is provided with a notch, and the first swelling beam, the mounting beam, and the bottom wall of the box body jointly enclose an avoidance channel communicating with the notch. The avoidance channel can be used to avoid the inlet part and the outlet part of the thermal management component. The walls of the mounting beam on both sides of the notch are connected by a strengthening beam to enhance the stability of the mounting beam, thereby further enhancing the structural stability of the swelling beam. In this way, the swelling force exerted by the battery cell on the first swelling beam is dispersed, avoiding excessive local stress on the first swelling beam, making the force distribution more uniform, and thus enhancing the ability of the first swelling beam to resist the swelling force of the battery cell.

[0092] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of an electrical device 1A provided by some embodiments of the present utility model. The electrical device 1A can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spaceship, etc.

[0093] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical device 1A in the embodiments of the present utility model for description.

[0094] The interior of the vehicle is provided with a battery device 1000, and the battery device 1000 can be arranged at the bottom, the head, or the tail of the vehicle. The battery device 1000 can be used for the power supply of the vehicle. For example, the battery device 1000 can be used as the operating power source of the vehicle.

[0095] The vehicle may further include a controller 2000 and a motor 3000. The controller 2000 is used to control the battery device 1000 to supply power to the motor 3000. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle.

[0096] In the embodiments of the present utility model, the battery device 1000 can not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0097] Please refer to Figure 2 , Figure 2FIG. 0 is a first schematic structural diagram of a battery device 1000 provided by some embodiments of the present utility model. The battery device 1000 includes a battery cell 300 and a box body 200, and the box body 200 is used to accommodate the battery cell 300. The power consumption device 1A in the embodiment of the present utility model uses the battery device 1000 or the battery cell 300 as a power source.

[0098] In the embodiment of the present utility model, the battery cell 300 may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of the present utility model do not limit this. The battery cell 300 may be in a cylindrical shape, a flat shape, a cuboid shape or other shapes, etc., and the embodiments of the present utility model do not limit this either. Generally, the battery cell 300 is divided into three types according to the packaging method: a cylindrical battery cell 300, a square battery cell 300, and a soft-pack battery cell 300, and the embodiments of the present utility model do not limit this either.

[0099] The battery device 1000 mentioned in the embodiment of the present utility model refers to a single physical module including one or more battery cells 300 to provide a higher voltage and capacity. For example, the battery device 1000 mentioned in the embodiment of the present utility model may include a battery module or a battery pack, etc. The battery device 1000 generally includes a box body 200 for encapsulating one or more battery cells 300. The box body 200 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 300.

[0100] Among them, the box body 200 is a component for accommodating the battery cell 300, the box body 200 provides an accommodation space for the battery cell 300, and the box body 200 can adopt various structures. In some embodiments, the box body 200 may include a first box body and a second box body, and the first box body and the second box body are covered with each other to define an accommodation space for accommodating the battery cell 300. The first box body and the second box body may be in various shapes, such as a cuboid shape, a cylindrical shape, etc. The first box body may be a hollow structure with one side open, and the second box body may also be a hollow structure with one side open. The open side of the second box body is covered on the open side of the first box body, then the box body 200 with an accommodation space is formed. It may also be that the first box body is a hollow structure with one side open, the second box body is a plate-shaped structure, and the second box body is covered on the open side of the first box body, then the box body 200 with an accommodation space is formed. The first box body and the second box body can be sealed through a sealing element, and the sealing element can be a sealing ring, a sealing glue, etc.

[0101] In the battery device 1000, when there are multiple battery cells 300, the multiple battery cells 300 can be connected in series, in parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 300. It can be that multiple battery cells 300 are first connected in series, in parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a combined series-parallel connection to form an entirety, which is accommodated in the box body 200. It can also be that all the battery cells 300 are directly connected in series, in parallel, or in a combined series-parallel connection together, and then the entirety formed by all the battery cells 300 is accommodated in the box body 200.

[0102] In some embodiments, the battery device 1000 may further include a busbar component. The multiple battery cells 300 can be electrically connected through the busbar component to achieve series, parallel, or combined series-parallel connection of the multiple battery cells 300. The busbar component can be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0103] In some embodiments, the battery device 1000 can be an energy storage device. The energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0104] Please refer to Figure 2 、 Figure 3 and Figure 4 , Figure 3 FIG. is the second schematic structural diagram of the battery device 1000 provided in some embodiments of the present invention, Figure 4 FIG. is the third schematic structural diagram of the battery device 1000 provided in some embodiments of the present invention. The battery device 1000 according to the embodiment of the present invention includes a first expansion beam 100, a box body 200, battery cells 300, a thermal management component 400, a strengthening beam 500, and a mounting beam 600. The battery cells 300 are disposed in the box body 200; the mounting beam 600 is mounted on the box body 200 and is provided with a notch 610 therethrough; the first expansion beam 100 is mounted in the box body 200 through the mounting beam 600 and cooperates with the battery cells 300. The first expansion beam 100, the mounting beam 600, and the bottom wall 202 of the box body 200 together define an avoidance channel 203 communicating with the notch 610; the thermal management component 400 is disposed in the box body 200 and is in heat exchange cooperation with the battery cells 300. The thermal management component 400 includes an inlet portion 411 and an outlet portion 412; at least one of the inlet portion 411 and the outlet portion 412 penetrates through the avoidance channel 203.

[0105] Wherein, the battery device 1000 further includes a strengthening beam 500 disposed at the notch 610. The strengthening beam 500 is connected to the wall bodies on both sides of the notch 610 of the mounting beam 600 and is connected to the first expansion beam 100.

[0106] For convenience of description, the length direction of the first expansion beam 100 (the width direction of the box body 200) is set as the first direction X, the thickness direction of the first expansion beam 100 (the length direction of the box body 200) is set as the second direction Y, and the height direction of the first expansion beam 100 (the height direction of the box body 200) is set as the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other pairwise. In a specific example, the first direction X is the left - right direction, the second direction Y is the front - back direction, and the third direction Z is the up - down direction.

[0107] Specifically, the first expansion beam 100 can be a structural member for bearing and controlling the expansion force of the battery cells 300. Along the third direction Z, the first expansion beam 100 can be spaced from the bottom wall 202 of the box body 200 and is suspended relative to the bottom wall 202. Along the first direction X, both ends of the first expansion beam 100 can be connected to the side walls 201 of the box body 200.

[0108] The first expansion beam 100 can be in contact with the sides of multiple battery cells 300 to bear the expansion force jointly exerted by the multiple battery cells 300. The first expansion beam 100 can be made of materials such as high - strength alloy, carbon fiber composite material, or engineering plastic, and its specific shape can be set according to requirements.

[0109] In one embodiment, the first expansion beam 100 can be in a frame shape. The frame - shaped first expansion beam 100 can include multiple cross - beams and longitudinal beams, and the multiple cross - beams and longitudinal beams jointly form multiple grid or lattice structures. When subjected to the expansion force from the battery cells 300, the multiple grid or lattice structures can disperse the expansion force more evenly, reduce local stress concentration, and thus enhance the overall ability of the first expansion beam 100 to resist the expansion of the battery cells 300.

[0110] The mounting beam 600 is a structural member connecting the bottom wall 202 of the box body 200 and the first expansion beam 100. It can be used to support the first expansion beam 100 and transfer the expansion force borne by the first expansion beam 100, thereby enhancing the ability of the first expansion beam 100 to resist the expansion of the battery cells 300. The notch 610 can penetrate through the mounting beam 600 along the thickness direction of the mounting beam 600. The mounting beam 600 can be a symmetric structure, and the notch 610 can be located on both sides of the symmetry line of the mounting beam 600 or at other parts of the mounting beam 600.

[0111] Along the third direction Z, the mounting beam 600 may include opposite ends, one end may be connected to the first expansion beam 100, and the other end may be connected to the bottom wall 202. The connection between the mounting beam 600 and the first expansion beam 100, and the connection between the mounting beam 600 and the bottom wall 202 may be non-detachable connections such as welding and riveting, or may be detachable connections such as threaded connections and pin connections. For example, one end of the mounting beam 600 may be connected to the first expansion beam 100 by a threaded connection, and the other end of the mounting beam 600 may be connected to the first expansion beam 100 by a threaded connection.

[0112] The first expansion beam 100 and the mounting beam 600 may be connected only by fasteners, or the first expansion beam 100 and the mounting beam 600 may be adhesively connected only by the adhesive layer 800, or the first expansion beam 100 and the mounting beam 600 may be adhesively connected by both fasteners and the adhesive layer 800.

[0113] Among them, the first expansion beam 100 may be directly adhesively connected to the mounting beam 600 through the adhesive layer 800. The adhesive layer 800 may be structural glue. Similarly, the first expansion beam 100 may be directly connected to the mounting beam 600 by fasteners, or may be indirectly fastened to the mounting beam 600 through fasteners. Among them, the fasteners connected between the first expansion beam 100 and the mounting beam 600 include but are not limited to bolts, studs, blind rivet nuts, etc.

[0114] The thermal management component 400 is disposed inside the box body 200. For example, the thermal management component 400 is provided on the bottom wall 202 of the box body 200. The thermal management component 400 may be placed on the bottom wall 202, or may be fixed to the bottom wall 202 by fasteners. The thermal management component 400 may include one or more heat exchange tubes 410. The heat exchange tubes 410 may be flat tubes. The thermal management component 400 may be used for heat exchange cooperation with the battery cells 300 to enable the battery cells 300 to operate within a suitable temperature range. When the battery device 1000 is working, the external heat exchange fluid may enter the heat exchange tube 410 from the inlet portion 411, complete heat exchange with the battery cells 300, and then flow out from the outlet portion 412.

[0115] Among them, at least one of the inlet portion 411 and the outlet portion 412 penetrates through the avoidance channel 203. That is to say, only the inlet portion 411 may penetrate through the avoidance channel 203, or only the outlet portion 412 may penetrate through the avoidance channel 203, or both the inlet portion 411 and the outlet portion 412 may penetrate through the avoidance channel 203 to facilitate the connection between the inlet portion 411 and the outlet portion 412 of the thermal management component 400 and the external pipeline. In addition, the number of the avoidance channels 203 may be one or more. Therefore, the inlet portion 411 and the outlet portion 412 may penetrate through the same avoidance channel 203, or the inlet portion 411 and the outlet portion 412 may penetrate through different avoidance channels 203 respectively.

[0116] The thermal management component 400 may further include a current collector 420. The current collector 420 and the heat exchange tube 410 may be respectively arranged on both sides of the first expansion beam 100 in the second direction Y. To connect the inlet portion 411 and the outlet portion 412 of the heat exchange tube 410 to the current collector 420, in this embodiment, the first expansion beam 100 is disposed on the mounting beam 600. In this way, the mounting beam 600 can lift the first expansion beam 100, so that the first expansion beam 100 is spaced apart from the bottom wall 202 of the box body 200. At the same time, an avoidance channel 203 is defined by the cooperation between the mounting beam 600 and the bottom wall 202 of the box body 200. The avoidance channel 203 communicates with the spaces on both sides of the mounting beam 600 in the second direction Y. The inlet portion 411 and the outlet portion 412 of the heat exchange tube 410 can pass through the avoidance channel 203 from one side of the mounting beam 600 and extend to the other side of the mounting beam 600 to be connected to the current collector 420 located on the other side of the mounting beam 600.

[0117] The shape of the strengthening beam 500 can be linear, curved, or with a specific structure such as corrugations or ribs. In terms of material, high-strength metals or composite materials can be selected to meet the requirements of structural strength and light weight.

[0118] The connection methods between the strengthening beam 500 and the first expansion beam 100, and between the strengthening beam 500 and the mounting beam 600 can be non-detachable connections such as welding and riveting, or detachable connections such as screw connections and pin connections.

[0119] When the battery cell 300 expands, the force can be directly transmitted to the mounting beam 600 through the first expansion beam 100, or directly transmitted to the wall bodies on both sides of the notch 610 of the mounting beam 600 through the strengthening beam 500. It can also be transmitted between the wall bodies on both sides of the notch 610 of the mounting beam 600 through the strengthening beam 500 and further transmitted to the bottom wall 202 of the box body 200 through the mounting beam 600. This optimizes the force distribution, avoids local stress concentration, and improves the ability of the first expansion beam 100 to resist the expansion force of the battery cell 300.

[0120] In the battery device 1000 according to the embodiment of the present invention, the strengthening beam 500, the mounting beam 600, and the first expansion beam 100 can form a continuous structure, and the strengthening beam 500 can cooperate with the mounting beam 600 to jointly support the first expansion beam 100, so that the stability of the first expansion beam 100 is relatively high. This can effectively disperse the expansion force exerted by the battery cell 300 on the first expansion beam 100, avoid excessive local stress on the first expansion beam 100, make the force distribution more uniform, and thus improve the ability of the first expansion beam 100 to resist the expansion force of the battery cell 300.

[0121] In addition, the avoidance channel 203 can provide space for the inlet portion 411 or the outlet portion 412 of the heat management component 400, thereby improving the overall space utilization rate of the battery device 1000.

[0122] In some embodiments, the strengthening beam 500 is horizontally disposed across the notch 610 and is connected to the wall bodies on both sides of the notch 610 formed by the mounting beam 600.

[0123] Specifically, along the first direction X, the strengthening beam 500 may include two opposite end faces. On both sides of the notch 610, the mounting beam 600 may include two end faces facing opposite directions. The two end faces of the strengthening beam 500 may be butted against the two end faces of the mounting beam 600.

[0124] In this way, the occupied space of the strengthening beam 500 is small, which is beneficial to improving the space utilization rate of the battery device 1000.

[0125] Please refer to Figure 3 , in some embodiments, the strengthening beam 500 covers the notch 610 and is connected to the wall bodies on both sides of the mounting beam 600 near the notch 610.

[0126] Specifically, along the first direction X, the strengthening beam 500 may include two opposite ends. The two opposite ends of the strengthening beam 500 may be sleeved on the wall bodies of the mounting beam 600 near the notch 610.

[0127] In this way, the connection area between the strengthening beam 500 and the mounting beam 600 is large, which can improve the stability of the strengthening beam 500 itself, enabling the strengthening beam 500 to stably support the first expansion beam 100, thereby improving the ability of the first expansion beam 100 to resist the expansion force of the battery cell 300.

[0128] Please refer to Figure 3 and Figure 5 , Figure 5 is Figure 2 an enlarged view of part a of the battery device 1000. In some embodiments, the strengthening beam 500 includes a first strengthening portion 510 and a second strengthening portion 520 connected at an angle. The first strengthening portion 510 is connected to the mounting beam 600, and the second strengthening portion 520 is connected to the first expansion beam 100.

[0129] Specifically, the included angle between the first reinforcing portion 510 and the second reinforcing portion 520 can be an acute angle, a right angle, or an obtuse angle. Among them, the first reinforcing portion 510 can extend along the third direction Z. The second reinforcing portion 520 can extend along the second direction Y. The connection manner between the first reinforcing portion 510 and the mounting beam 600 can be the same as or different from the connection manner between the second reinforcing portion 520 and the first expansion beam 100. For example, the connection manner between the first reinforcing portion 510 and the mounting beam 600 and the connection manner between the second reinforcing portion 520 and the first expansion beam 100 can both be threaded connections.

[0130] Thus, due to the setting of the included angle between the first reinforcing portion 510 and the second reinforcing portion 520, the reinforcing beam 500 can provide additional support when connecting to the mounting beam 600 and the first expansion beam 100, increasing the rigidity of the overall structure of the reinforcing beam 500, the mounting beam 600, and the first expansion beam 100, which helps to improve the stability and torsional resistance of the overall structure, thereby enhancing the ability of the first expansion beam 100 to resist the expansion force of the battery cell 300.

[0131] In addition, the first reinforcing portion 510 and the second reinforcing portion 520 connected at an included angle enable the reinforcing beam 500 to have a larger installation space, which facilitates the connection between the reinforcing beam 500 and the mounting beam 600 and the first expansion beam 100.

[0132] Please refer to Figure 3 、 Figure 6 and Figure 7 , Figure 6 which is the fourth schematic structural diagram of the battery device 1000 provided by some embodiments of the present utility model, Figure 7 is Figure 6 the enlarged view of part b of the battery device 1000. In some embodiments, the mounting beam 600 includes a first beam 620, a second beam 630, and a third beam 640 that are sequentially connected at an included angle. Both the first beam 620 and the third beam 640 are connected to the bottom wall 202 of the box body 200. The first beam 620 is closer to the battery cell 300 than the third beam 640; the first reinforcing portion 510 is connected to the third beam 640, and the second reinforcing portion 520 is connected to the second beam 630.

[0133] Specifically, the first beam 620 and the third beam 640 can be respectively connected to both sides of the second beam 630. The included angle between the first beam 620 and the second beam 630 can be an acute angle, a right angle, or an obtuse angle. The included angle between the third beam 640 and the second beam 630 can be the same as or different from the included angle between the first beam 620 and the second beam 630. For example, both the included angle between the third beam 640 and the second beam 630 and the included angle between the first beam 620 and the second beam 630 are right angles.

[0134] Among them, the first beam 620 may include two angled segments, one of which may be connected to the bottom wall 202 and the other may be connected to the second beam 630. The included angle between the first beam 620 and the second beam 630 refers to the included angle between the segment of the first beam 620 that is connected to the second beam 630 and the second beam 630. The third beam 640 may include two angled segments, one of which may be connected to the bottom wall 202 and the other may be connected to the second beam 630. The included angle between the third beam 640 and the second beam 630 refers to the included angle between the segment of the third beam 640 that is connected to the second beam 630 and the second beam 630.

[0135] Thus, due to the setting of the included angles of the first beam 620, the second beam 630, and the third beam 640, a frame structure can be formed between the mounting beam 600 and the bottom wall 202 of the box body 200, which can increase the structural strength of the mounting beam 600, thereby enhancing the stability between the mounting beam 600, the first expansion beam 100, and the reinforcing beam 500, and further enhancing the ability of the first expansion beam 100 to resist the expansion force of the battery cell 300.

[0136] In addition, the first beam 620, the second beam 630, and the third beam 640 connected at an included angle enable the mounting beam 600 to have a relatively large mounting space, which facilitates the connection between the mounting beam 600, the reinforcing beam 500, and the first expansion beam 100.

[0137] Please refer to Figure 6 and Figure 7 . In some embodiments, the number of notches 610 is one or more; when the number of notches 610 is multiple, the number of mounting beams 600 is multiple and corresponds to the multiple notches 610 one by one. For example, the number of mounting beams 600 can be two, and the two mounting beams 600 are provided with two notches 610 therethrough.

[0138] Thus, multiple mounting beams 600 can provide multiple support points, thereby dispersing the force on the first expansion beam 100 to enhance the ability of the first expansion beam 100 to resist the expansion force of the battery cell 300.

[0139] In some embodiments, when the number of notches 610 is multiple, the number of mounting beams 600 is one, and one mounting beam 600 faces the multiple notches 610. For example, along the first direction X, three notches 610 are provided therethrough at multiple spaced positions of the mounting beam 600. Among them, the distance between two adjacent notches 610 among the three notches 610 can be equal or unequal.

[0140] Thus, the notches 610 can be formed on one mounting beam 600, which facilitates the manufacture of the mounting beam 600 and is beneficial to reducing the manufacturing cost.

[0141] Please refer to Figure 6 、 Figure 7 andFigure 8 , Figure 8 It is the fifth schematic structural view of the battery device 1000 provided by some embodiments of the present utility model. In some embodiments, the heat management component 400 is formed by bending the heat exchange tube 410, and the inlet part 411 and the outlet part 412 of the heat exchange tube 410 are arranged adjacent to each other, so that both the inlet part 411 and the outlet part 412 of the heat exchange tube 410 penetrate through the notch 610.

[0142] Specifically, the inlet part 411 and the outlet part 412 of the heat exchange tube 410 can be the inlet part 411 and the outlet part 412 of the heat management component 400. The inlet part 411 and the outlet part 412 of the heat exchange tube 410 can be arranged side by side along the first direction X. And, along the first direction X, the overall size of the inlet part 411 and the outlet part 412 can be smaller than the size of the notch 610.

[0143] In this way, the heat management component 400 is formed by bending the heat pipe, which can increase the contact area between the battery cell 300 and the heat management component 400, thereby improving the heat exchange effect between the heat management component 400 and the battery cell 300.

[0144] In addition, the notch 610 can provide a channel for the inlet part 411 and the outlet part 412, which is beneficial to the layout of the heat management component 400.

[0145] Please refer to Figure 6 , Figure 7 and Figure 8 , in some embodiments, the number of the heat exchange tubes 410 is multiple, and the multiple inlet parts 411 and the multiple outlet parts 412 of the multiple heat exchange tubes 410 are all concentrated and arranged adjacent to each other, and commonly penetrate through a notch 610. For example, the number of the heat exchange tubes 410 is two. The two heat exchange tubes 410 can include two inlet parts 411 and two outlet parts 412. The positional relationship between the inlet part 411 and the outlet part 412 can be that the inlet part 411, the outlet part 412, the inlet part 411 and the outlet part 412 are arranged at intervals along the first direction X, or the inlet part 411, the inlet part 411, the outlet part 412, the outlet part 412 are arranged at intervals along the first direction X, or other combinations.

[0146] In this way, the occupied space of the heat exchange tube 410 is small, which is beneficial to improving the space utilization rate of the battery device 1000.

[0147] In some embodiments, the number of heat exchange tubes 410 is multiple, and the number of notches 610 is also multiple. The inlet portion 411 and the outlet portion 412 of each heat exchange tube 410 pass through one notch 610. For example, the number of notches 610 is four, and the number of heat exchange tubes 410 is two. The two heat exchange tubes 410 may include two outlet portions 412 and two inlet portions 411, and the two outlet portions 412 and the two inlet portions 411 may independently pass through the four notches 610 respectively.

[0148] In this way, the inlet portion 411 and the outlet portion 412 of each heat exchange tube 410 are independently arranged, which can reduce the interference between adjacent or close inlet portions 411 or outlets, and facilitate the maintenance of the inlet portion 411 and the outlet portion 412.

[0149] Please refer to Figure 6 、 Figure 7 and Figure 8 In some embodiments, the heat exchange tube 410 gradually extends and bends from the outer periphery of the battery device 1000 towards the middle position of the battery device 1000. In this way, the contact area between the heat exchange tube 410 and the battery cell 300 is relatively large, which can improve the heat exchange effect between the heat exchange tube 410 and the battery cell 300.

[0150] Please refer to Figure 6 、 Figure 7 and Figure 8 In some embodiments, the number of heat exchange tubes 410 is multiple and they are arranged in parallel. For example, the number of heat exchange tubes 410 is two. One of the heat exchange tubes 410 includes an inlet portion 411 and an outlet portion 412, and the other heat exchange tube 410 also includes an inlet portion 411 and an outlet portion 412.

[0151] In this way, interference is not likely to occur between the multiple heat exchange tubes 410.

[0152] Please refer to Figure 6 and Figure 7 In some embodiments, an installation groove 204 is formed on the bottom wall 202, and the heat exchange tube 410 is arranged in the installation groove 204 and extends along the extension direction of the installation groove 204.

[0153] Among them, the installation groove 204 may be a blind groove provided on the bottom wall 202. Along the width direction of the installation groove 204, the size of the heat exchange tube 410 may be smaller than the width of the installation groove 204. The heat exchange tube 410 may be arranged in the installation groove 204 by means of snap connection and may be fixed with structural adhesive.

[0154] In this way, the setting of the installation groove 204 can facilitate the arrangement of the heat exchange tube 410, reduce the space occupied by the heat exchange tube 410 inside the box body 200, make the structure compact, and improve the energy density of the battery device 1000.

[0155] Please refer to Figure 9 , Figure 9 which is a schematic structural view of the first expansion beam 100 provided by some embodiments of the present utility model. In some embodiments, the first expansion beam 100 includes a plurality of plate bodies, and all the plurality of plate bodies are sheet metal parts, and the plurality of plate bodies are welded together to form the first expansion beam 100.

[0156] Specifically, the first expansion beam 100 may include two, three, four, five, six or more plate bodies. The plate body is a sheet metal part, that is, the plate body is a metal plate. For example, the plate body may be a steel plate. Further, the plate body may be a steel plate with a yield strength greater than or equal to 340 MPa and a tensile strength greater than or equal to 590 MPa.

[0157] When manufacturing the first expansion beam 100, a plurality of plate bodies of the first expansion beam 100 may be processed from a sheet metal base material first, and then the plurality of plate bodies are welded together. Finally, the welded first expansion beam 100 is placed in an electrophoresis tank for electrophoresis to improve the service life of the first expansion beam 100.

[0158] In this way, since the plurality of plate bodies are welded to each other to form an integral first expansion beam 100, the structure of the first expansion beam 100 can be simplified, which is convenient for the first expansion beam 100 to be processed and formed, and the cost is reduced; at the same time, the plate body is set as a sheet metal part, which can improve the structural strength of the plate body and the structural strength of the first expansion beam 100.

[0159] Please refer to Figure 10 , Figure 10 which is Figure 9 a disassembled schematic view of the first expansion beam 100. In some embodiments, the first expansion beam 100 includes a plurality of plate bodies connected together, and the plurality of plate bodies respectively include: a first plate 10 and a second plate 20. The first plate 10 and the second plate 20 extend along a first direction X and are arranged in a second direction Y. In a third direction Z, two ends of the first plate 10 are respectively connected to two ends of the second plate 20, and cooperate to define a cavity of the first expansion beam 100. The first direction X, the second direction Y and the third direction Z intersect pairwise.

[0160] Specifically, the first plate 10 and the second plate 20 may be plates extending along the length direction and the height direction of the first expansion beam 100. The first plate 10 and the second plate 20 may be arranged in the thickness direction of the first expansion beam 100. Two ends of the first plate 10 in the height direction of the first expansion beam 100 may be respectively connected to two ends of the second plate 20 in the height direction of the first expansion beam 100, and form the first expansion beam 100 with a cavity, that is, the first expansion beam 100 may be a hollow beam. In this way, compared with the expansion beam formed by extrusion molding, the first expansion beam 100 of this embodiment has a simpler structure, is more convenient to process, and has a lower cost.

[0161] It should be noted that the third direction Z intersecting with the first direction X and the second direction Y pairwise means that the first direction X and the second direction Y are arranged at an angle, and the included angle between the first direction X and the second direction Y is greater than 0° and less than 180°. For example, the included angle between the first direction X and the second direction Y can be arranged at an included angle of 30°, 60°, 90°, 120° or 150°. The third direction Z is arranged at an angle with the first direction X, and the included angle between the third direction Z and the first direction X is greater than 0° and less than 180°. For example, the included angle between the third direction Z and the first direction X can be arranged at an included angle of 30°, 60°, 90°, 120° or 150°. The third direction Z is arranged at an angle with the second direction Y, and the included angle between the third direction Z and the second direction Y is greater than 0° and less than 180°. For example, the included angle between the third direction Z and the second direction Y can be arranged at an included angle of 30°, 60°, 90°, 120° or 150°.

[0162] In this way, since the multiple plate bodies include the first plate 10 and the second plate 20, and the first plate 10 and the second plate 20 are connected and define the cavity of the first expansion beam 100, the composition structure of the first expansion beam 100 can be simplified, which is convenient for processing and reduces costs.

[0163] Please refer to Figure 10 , in some embodiments, in the third direction Z, both ends of the first plate 10 have a first flanging 11 and a second flanging 12 extending towards the second plate 20, both ends of the second plate 20 have a third flanging 211 and a fourth flanging 221 extending towards the first plate 10, the first flanging 11 is lap-connected with the third flanging 211, and the second flanging 12 is lap-connected with the fourth flanging 221.

[0164] Specifically, both ends of the first plate 10 in the height direction of the first expansion beam 100 are respectively formed with a first flanging 11 and a second flanging 12. Both the first flanging 11 and the second flanging 12 can extend towards the second plate 20 along the thickness direction of the first expansion beam 100. Among them, the first flanging 11 and the second flanging 12 can be respectively bent from both ends of the first plate 10 towards the second plate 20. At this time, the cross-section of the first plate 10 perpendicular to the length direction is a U shape opening towards the second plate 20.

[0165] Both ends of the second plate 20 in the height direction of the first expansion beam 100 can be respectively formed with a third flanging 211 and a fourth flanging 221. Both the third flanging 211 and the fourth flanging 221 can extend towards the first plate 10 along the thickness direction of the first expansion beam 100. Among them, the third flanging 211 and the fourth flanging 221 can be respectively bent from both ends of the second plate 20 towards the first plate 10. At this time, the cross-section of the second plate 20 perpendicular to the length direction is a U shape opening towards the first plate 10.

[0166] When the first plate 10 and the second plate 20 are assembled, the first flange 11 and the third flange 211 can be stacked and welded in the height direction of the first expansion beam 100, and the second flange 12 and the fourth flange 221 can be stacked and welded in the height direction of the first expansion beam 100. Thus, the first plate 10 and the second plate 20 can be welded and connected conveniently, and the first expansion beam 100 can be formed into a beam with a cavity. In addition, the first flange 11 and the third flange 211 are overlapped and welded, and the second flange 12 and the fourth flange 221 are overlapped and welded, which can also improve the connection strength between the first plate 10 and the second plate 20 and enhance the overall strength of the first expansion beam 100.

[0167] In this way, since the first flange 11 and the second flange 12 of the first plate 10 are respectively overlapped and connected with the third flange 211 and the fourth flange 221 of the second plate 20, the structure is simple, which can facilitate the welding connection between the first plate 10 and the second plate 20, and can improve the structural strength of the welding position, thereby improving the structural strength of the first expansion beam 100.

[0168] Please refer to Figure 10 In some embodiments, the second plate 20 includes a main plate 21 and a support plate 22 which are separately arranged. The main plate 21 is arranged on the side of the support plate 22 which is away from the bottom wall 202 in the third direction Z. The main plate 21 is provided with a first folded edge 212 which extends away from the second plate 20 along the second direction Y. The support plate 22 is provided with a second folded edge 222 which extends away from the second plate 20 along the second direction Y. The first folded edge 212 and the second folded edge 222 are stacked and connected.

[0169] Specifically, the main board 21 and the support plate 22 can be arranged in the height direction of the first expansion beam 100, and the main board 21 can be a plate extending along the length direction and the height direction of the first expansion beam 100. The support plate 22 can be connected to the side of the main board 21 facing the heat exchange tube 410. The main board 21 and the support plate 22 can be independent components, and the main board 21 and the support plate 22 can be connected by welding. The main board 21 and the support plate 22 set separately can reduce the processing difficulty of the second plate 20 and improve production efficiency.

[0170] A first folded edge 212 may be provided on one side edge of the main board 21 facing the support board 22. A third flanged edge 211 may be provided on one side edge of the main board 21 facing away from the support board 22. A second folded edge 222 may be provided on one side edge of the support board 22 facing the main board 21. A fourth flanged edge 221 may be formed on one side edge of the support board 22 facing away from the main board 21.

[0171] The first folded edge 212 and the second folded edge 222 may be overlapped and connected. For example, the first folded edge 212 and the second folded edge 222 are stacked and welded in the height direction of the first expansion beam 100. In this way, not only the connection reliability between the main board 21 and the support board 22 can be improved, but also the structural strength of the second board 20 can be improved, thereby improving the structural strength of the first expansion beam 100.

[0172] The first folded edge 212 and the second folded edge 222 may both extend away from the cavity in the thickness direction of the first expansion beam 100. Thus, the first folded edge 212 and the second folded edge 222 may be located outside the cavity, facilitating the welding operation of the first folded edge 212 and the second folded edge 222.

[0173] In this way, by making the second plate 20 include a separately arranged main plate 21 and a support plate 22, the production difficulty of the second plate 20 can be reduced and the processing efficiency can be improved; at the same time, by making the main plate 21 and the support plate 22 connected by lap welding through the first folded edge 212 and the second folded edge 222 respectively, the structural strength of the second plate 20 can be improved, and the welding connection of the main plate 21 and the support plate 22 is facilitated.

[0174] Please refer to Figure 5 , Figure 8 and Figure 10 In some embodiments, the first folded edge 212 is formed with a plurality of first fixing holes 2121 that penetrate the first folded edge 212 along the third direction Z, and the plurality of first fixing holes 2121 are arranged at intervals along the first direction X. The first expansion beam 100 is connected to the mounting beam 600 by fasteners passing through a portion of the first fixing holes 2121, and the first expansion beam 100 is connected to the reinforcing beam 500 by fasteners passing through another portion of the first fixing holes 2121.

[0175] Specifically, the first folded edge 212 may extend along the length direction and the thickness direction of the first expansion beam 100, and a plurality of first fixing holes 2121 may be provided on the first folded edge 212. For example, two, four, six, eight, ten, twelve, fourteen or more first fixing holes 2121 may be provided on the first folded edge 212. The plurality of first fixing holes 2121 may be arranged at intervals along the length direction of the first expansion beam 100. During assembly, the first expansion beam 100 welded as one and after electrophoresis is placed in the box 200. Then, a plurality of fasteners are respectively passed through the corresponding first fixing holes 2121 to connect the first expansion beam 100 to the mounting beam 600, and to connect the first expansion beam 100 to the reinforcing beam 500.

[0176] The fastener may be a bolt or a rivet nut, etc. The first fixing hole 2121 may be a circular hole or other polygonal holes.

[0177] In this way, the first folded edge 212 is provided with a plurality of first fixing holes 2121 for fastening connection with the mounting beam 600, thereby facilitating the first expansion beam 100 to be connected with the mounting beam 600 and the reinforcing beam 500 through fasteners, and the plurality of first fixing holes 2121 can improve the reliability of the connection between the first expansion beam 100 and the mounting beam 600 and the reinforcing beam 500 and the uniformity of force.

[0178] Please refer to Figure 10 In some embodiments, the first folded edge 212 includes a plurality of connecting portions 2123 and a plurality of recessed portions 2122, and the plurality of recessed portions 2122 are alternately arranged and connected with the plurality of connecting portions 2123 along the first direction X. The recessed portions 2122 are formed by being recessed by the first folded edge 212 toward the support plate 22, and each recessed portion 2122 is formed with at least one first fixing hole 2121.

[0179] The second folded edge 222 includes a plurality of first lugs 2221 extending away from the first plate 10 along the second direction Y. The plurality of first lugs 2221 are arranged at intervals along the first direction X. An escape portion 2222 is defined between two adjacent first lugs 2221.

[0180] The recessed portion 2122 is located in the avoiding portion 2222 , and the plurality of connecting portions 2123 correspond to and are connected to the plurality of first lugs 2221 one by one.

[0181] Specifically, a plurality of recesses 2122 and a plurality of connecting portions 2123 may be arranged alternately in the length direction of the first folded edge 212. Both ends of the first folded edge 212 in the length direction may be connecting portions 2123. The recesses 2122 may be recessed relative to the connecting portion 2123 in the direction toward the support plate 22. For example, the recesses 2122 may be stamped on the first folded edge 212 in the direction toward the support plate 22. Two adjacent recesses 2122 may cooperate with the connecting portion 2123 to define a recessed groove opening toward the second folded edge 222. The recessed groove may penetrate the two side edges of the first folded edge 212 along the width direction of the first folded edge 212.

[0182] Meanwhile, the first fixing hole 2121 may penetrate the recess 2122 along the thickness direction of the first folded edge 212. Furthermore, at least one first fixing hole 2121 may be formed on each recess 2122. For example, one first fixing hole 2121 may be formed on a portion of the plurality of recesses 2122, and two or three first fixing holes 2121 may be formed on another portion of the plurality of recesses 2122.

[0183] The second folding edge 222 may be formed with a plurality of first lugs 2221 arranged at intervals. The plurality of first lugs 2221 may be in the shape of a rectangular plate extending along the length direction and the width direction of the second folding edge 222. The plurality of first lugs 2221 may all be located in the recessed groove. An escape portion 2222 may be defined between two adjacent first lugs 2221. The plurality of recesses 2122 and the plurality of escape portions 2222 may be arranged one-to-one in correspondence, and the plurality of recesses 2122 may extend into the corresponding escape portions 2222. The escape portion 2222 may be a through groove provided on the second folding edge 222.

[0184] When the first folded edge 212 is connected to the second folded edge 222, the first lug 2221 of the second folded edge 222 can be matched in the concave groove at the location of the corresponding connecting portion 2123, and can be welded to the corresponding connecting portion 2123. The concave portion 2122 can correspond to the avoidance portion 2222 one by one, and match the corresponding avoidance portion 2222, so that the first fixing hole 2121 is exposed at the position of the avoidance portion 2222, so as to facilitate the fasteners disposed in the first fixing hole 2121 to pass through the avoidance portion 2222 and connect to the box body 200.

[0185] Thus, since a plurality of recesses 2122 are formed on the first folded edge 212, the plurality of recesses 2122 can improve the structural strength of the first folded edge 212 and improve the reliability of the connection between the first folded edge 212 and the box body 200. At the same time, since the recess 2122 is located in the avoidance portion 2222, the first lug 2221 can be flush with the lower surface of the recess 2122, or the recess 2122 can protrude from the lower surface of the first lug 2221, so that the recess 2122 can abut against the connected parts when connected to the mounting beam 600, thereby improving the reliability of the fastened connection.

[0186] Please refer to Figure 5 , Figure 8 and Figure 10 In some embodiments, a first avoidance groove 223 which is recessed toward the main board 21 is formed on an edge of the support plate 22 on one side away from the main board 21 in the third direction Z, and a second avoidance groove 530 is formed on the reinforcing beam 500. The first avoidance groove 223 and the second avoidance groove 530 are arranged at intervals along the second direction Y, and both the first avoidance groove 223 and the second avoidance groove 530 are used to avoid the inlet portion 411 and the outlet portion 412.

[0187] Specifically, the first avoidance groove 223 can be formed in the middle of the support portion. In the direction from the support plate 22 to the main board 21, the width of the first avoidance groove 223 can be gradually reduced. Thus, it can be beneficial to the processing and forming of the first avoidance groove 223 and reduce stress concentration.

[0188] The second avoidance groove 530 may be formed at the middle position of the reinforcing beam 500. The shape of the second avoidance groove 530 may be the same as that of the first avoidance groove 223, so as to provide a positioning function during assembly.

[0189] In this way, by providing the first avoidance groove 223 and the second avoidance groove 530 on the support plate 22 and the reinforcing beam 500 respectively to avoid the inlet part 411 and the outlet part 412 of the heat exchange tube 410, the mutual interference between the support plate 22 and the inlet part 411 and the outlet part 412 can be reduced, and the layout can be made more compact and reasonable.

[0190] Please refer to Figure 10 , in some embodiments, the plurality of plate bodies further includes a reinforcing plate 30. The reinforcing plate 30 extends along the first direction X. The reinforcing plate 30 is disposed between the first plate 10 and the second plate 20 and is connected to the first plate 10 and the second plate 20.

[0191] Specifically, the number of the reinforcing plates 30 may be one or more. The reinforcing plate 30 may be a flat plate connected between the first plate 10 and the second plate 20, or may be a bent plate. This embodiment does not make specific limitations on this.

[0192] In this way, due to the arrangement of the reinforcing plate 30 between the first plate 10 and the second plate 20, the reinforcing plate 30 can strengthen the overall structural strength of the first expansion beam 100 and improve the anti-expansion effect on the battery cell 300.

[0193] Please refer to Figure 10 , in some embodiments, the reinforcing plate 30 includes a flat plate portion 31 and a bent portion 32. The flat plate portion 31 is attached to and connected to the surface of the first plate 10. The bent portion 32 is connected to the flat plate portion 31 and is formed into a U-shaped structure extending along the first direction X and opening towards the first plate 10 in the second direction Y.

[0194] Specifically, the reinforcing plate 30 may include a plurality of flat plate portions 31 and at least one bent portion 32. The plurality of flat plate portions 31 may be arranged at intervals along the length direction or the height direction of the first expansion beam 100. The surface of the flat plate portion 31 may be attached to the surface of the first plate 10 on the side facing the second plate 20. The bent portion 32 may be connected between two adjacent flat plate portions 31. Both ends of the bent portion 32 may be respectively connected to the two flat plate portions 31, and the middle of the bent portion 32 may protrude towards the second plate 20 and be welded to the second plate 20.

[0195] The bent portion 32 may include two side plates and a bottom plate. Among them, the bottom plate may be a flat plate extending along the length direction and the height direction of the first expansion beam 100, and the surface of the bottom plate may be attached to the surface of the second plate 20 facing the first plate 10. The two side plates may be respectively connected to both side edges in the width direction of the bottom plate, and extend toward the first plate 10 along the thickness direction of the first expansion beam 100 to be connected to the flat plate portion 31. Among them, the side plates and the bottom plate may be perpendicularly arranged, and the connection position between the side plates and the bottom plate may be connected by an arc to reduce stress concentration.

[0196] In this way, by making the reinforcing plate 30 include the flat plate portion 31 connected to the first plate 10 and the bent portion 32 protruding and bent toward the second plate 20, not only can the reinforcing plate 30 be conveniently welded to the first plate 10 and the second plate 20, but also the structural strength of the reinforcing plate 30 can be improved, and the overall strength of the first expansion beam 100 can be enhanced.

[0197] Please refer to Figure 10 , in some embodiments, the number of the bent portions 32 is multiple, and the multiple bent portions 32 are arranged at intervals along the third direction Z. The flat plate portion 31 is connected between two adjacent bent portions 32 and at both sides of the multiple bent portions 32 in the third direction Z.

[0198] Specifically, the number of the bent portions 32 may be two, three, four or more, etc. In this way, in the height direction of the first expansion beam 100, the reinforcing plate 30 can be connected to the first plate 10 and the second plate 20 through multiple flat plate portions 31 and multiple bent portions 32 respectively. For example, the reinforcing plate 30 may include three flat plate portions 31 and two bent portions 32. The two bent portions 32 are arranged at intervals up and down and are connected between two adjacent flat plate portions 31. This can improve the uniformity of the structural reinforcement of the first plate 10 and the second plate 20 by the reinforcing plate 30 in the height direction of the first expansion beam 100, thereby enhancing the overall structural strength of the first expansion beam 100.

[0199] A plurality of weight reduction holes may be formed on the bottom plate or the side plates of the bent portion 32. The plurality of weight reduction holes may be arranged at intervals along the length direction of the reinforcing plate 30. This can reduce the material consumption, reduce the weight of the reinforcing plate 30, reduce the weight of the first expansion beam 100, and improve the energy density of the battery device 1000.

[0200] In this way, by providing a plurality of bent portions 32 on the reinforcing plate 30, the structural strength of the reinforcing plate 30 can be further enhanced, the structural strength of the first expansion beam 100 can be enhanced, and the uniformity of the structural reinforcement of the first plate 10 and the second plate 20 by the reinforcing plate 30 in the height direction of the first expansion beam 100 can also be improved, and the strength weak area of the first expansion beam 100 can be reduced.

[0201] Please refer to Figure 10In some embodiments, the reinforcing plate 30 also includes a third folded edge 33, which is connected to the flat plate portion 31. The third folded edge 33 has a plurality of second lugs 331 extending away from the first plate 10 along the second direction Y. The plurality of second lugs 331 are arranged at intervals along the first direction X. The plurality of second lugs 331 are sandwiched between the first folded edge 212 and the second folded edge 222, and are welded to the first folded edge 212 and the second folded edge 222.

[0202] Specifically, the third folding edge 33 may include a folding edge body and a plurality of second lugs 331. The flat plate portion 31 closest to the support plate 22 among the plurality of flat plate portions 31 is the first flat plate portion. The folding edge body may be connected to a side edge of the first flat plate portion close to the support plate 22, and the folding edge body may be in the shape of a long strip extending from one end to the other end along the length direction of the first expansion beam 100. The plurality of second lugs 331 may be connected to a side edge of the folding edge body away from the first flat plate portion, and extend in the shape of a rectangular plate along the thickness direction and the length direction of the first expansion beam 100. An avoidance hole for avoiding the recess 2122 on the first folding edge 212 may be defined between two adjacent second lugs 331.

[0203] When welding the first expansion beam 100 , the connection portion 2123 on the first folded edge 212 , the second lug 331 on the third folded edge 33 , and the first lug 2221 on the second folded edge 222 may be stacked in sequence, and then the three layers are welded together.

[0204] In this way, since the reinforcing plate 30 is also provided with a third folded edge 33, and the third folded edge 33 is connected between the first folded edge 212 and the second folded edge 222, the third folded edge 33 can enhance the connection strength of the connection position between the first folded edge 212 and the second folded edge 222, and improve the reliability of the fastening connection between the first folded edge 212 and the box body 200. At the same time, a plurality of spaced second lugs 331 can define an avoidance hole for avoiding the recessed portion 2122 of the first folded edge 212, thereby reducing the probability of interference between the third folded edge 33 and the fasteners passed through the first fixing hole 2121.

[0205] Please refer to Figure 4 , Figure 8 and Figure 10, in some embodiments, the battery device 1000 further includes a first connecting plate 1001 and a second connecting plate 1002. The first connecting plate 1001 is fixed to the side wall 201 of the box body 200 by fasteners. At both ends of the first plate 10 in the first direction X, there are first connecting holes 13 penetrating the first plate 10 in the second direction Y. The first plate 10 is fixedly connected to the first connecting plate 1001 by fasteners passing through the first connecting holes 13. The second connecting plate 1002 is fixed to the side wall 201 of the box body 200 by fasteners. At both ends of the second plate 20 in the first direction X, there are second connecting holes 213 penetrating the second plate 20 in the second direction Y. The second plate 20 is fixedly connected to the second connecting plate 1002 by fasteners passing through the second connecting holes 213.

[0206] Specifically, the first connecting plate 1001 may be provided with a first hole and a second hole penetrating the first connecting plate 1001 in the thickness direction. One end of the first connecting plate 1001 can be fixed to the side wall 201 of the box body 200 by fasteners passing through the first hole and the first fastening hole on the side wall of the box body 200. At the same time, the other end of the first connecting plate 1001 can be fixedly connected to the first plate 10 by fasteners passing through the second hole and the first connecting hole 13 on the first plate 10. That is to say, on the side where the first plate 10 is located, both ends in the length direction of the first expansion beam 100 are fixedly connected to the box body 200 through the first connecting plate 1001.

[0207] The second connecting plate 1002 may be provided with a third hole and a fourth hole penetrating the second connecting plate 1002 in the thickness direction. One end of the second connecting plate 1002 is fixed to the side wall 201 of the box body 200 by fasteners passing through the third hole and the second fastening hole on the side wall of the box body 200. At the same time, the other end of the second connecting plate 1002 can be fixedly connected to the second plate 20 by fasteners passing through the fourth hole and the second connecting hole 213 on the second plate 20. That is to say, on the side where the second plate 20 is located, both ends in the length direction of the first expansion beam 100 are fixedly connected to the box body 200 through the second connecting plate 1002.

[0208] Among them, the number of the first connecting plates 1001 may be two. The two first connecting plates 1001 can respectively fix both ends of the first plate 10 in the length direction to two opposite side walls of the box body 200 in the first direction X. The number of the second connecting plates 1002 may be two. The two second connecting plates 1002 can respectively fix both ends of the second plate 20 in the length direction to two opposite side walls of the box body 200 in the first direction X.

[0209] In this way, both sides of the first expansion beam 100 in the thickness direction are respectively fixed to the inner wall of the box body 200 through the first connecting plate 1001 and the second connecting plate 1002. Thus, not only can the fastening connection between the first expansion beam 100 and the box body 200 be conveniently realized, but also the connection reliability between the first expansion beam 100 and the box body 200 can be improved.

[0210] Both the first connecting plate 1001 and the second connecting plate 1002 can be connected to the first expansion beam 100 through rivet nuts. Among them, the first expansion beam 100 can include a reinforcing plate 30. A hollow hole can be provided on the flat plate portion 31 of the reinforcing plate 30. The hollow hole can be directly opposite to the first connection hole 13 on the first plate 10 in the thickness direction of the first expansion beam 100. In this way, on the premise that the reinforcing plate 30 extends to the end edges at both ends in the length direction of the first plate 10, the interference between the reinforcing plate 30 and the rivet nut passing through the first connection hole 13 can be reduced.

[0211] In one example, the first connecting plate 1001 includes two sub-plate portions arranged in an L shape. The two sub-plate portions are respectively attached to the surface of the first plate 10 and the inner wall surface of the box body 200. The two sub-plate portions are connected by an arc. A first rib is provided at the connection position of the two sub-plate portions.

[0212] In one example, the second connecting plate 1002 includes a first section, a second section, and an inclined section connected between the first section and the second section. Among them, the first section is a plate body and is attached to the side wall 201 of the box body 200. A third hole is formed on the first section. The second section is plate-shaped and is attached to the surface of the second plate 20. A fourth hole is formed on the second section. The inclined section is a plate body inclined with respect to both the first section and the second section, and both ends of the inclined section are respectively connected to the first section and the second section by an arc.

[0213] A second rib can be provided on the second connecting plate 1002. The second rib can extend from one end to the other end of the second connecting plate 1002 in the first direction X to improve the structural strength of the second connecting plate 1002. The number of the third holes can be multiple, and the multiple third holes can be respectively arranged on both sides of the second rib in the third direction Z. The number of the fourth holes can be multiple, and the multiple fourth holes are respectively arranged on both sides of the second rib.

[0214] Please refer to Figure 5 and Figure 7 , in some embodiments, the battery device 1000 further includes a bracket 650. The bracket 650 is fixed to the bottom wall 202 and is arranged at the notch 610. The reinforcing beam 500 is supported on the bracket 650.

[0215] Specifically, the bracket 650 can be fixed to the bottom wall 202 of the box body 200 and arranged at the notch 610. Along the first direction X, one side of the notch 610 of the mounting beam 600, the bracket 650, and the other side of the notch 610 of the mounting beam 600 can be arranged at intervals.

[0216] Among them, the number of brackets 650 can be one, or the number of brackets 650 can also be multiple. For example, one, two, three, five, or seven or more brackets 650 can be arranged at the notch 610. Thus, the number of brackets 650 can be set according to the actual support requirements, as long as the inlet part 411 and the outlet part 412 of the heat exchange tube 410 are not blocked from passing through the mounting beam 600.

[0217] In this way, the bracket 650 can improve the stability of the reinforcing beam 500, thereby enhancing the structural strength of the first expansion beam 100, and further enhancing the ability of the first expansion beam 100 to resist the expansion force of the battery cell 300.

[0218] Please refer to Figure 5 and Figure 7 , in some embodiments, the bracket 650 includes a support plate 651 and a plurality of legs 652. The plurality of legs 652 are arranged along the circumferential direction of the support plate 651. The leg 652 includes a support section 6520 arranged in an L shape and an extension section 6521. The support section 6520 is connected to the bottom wall 202, and the extension section 6521 extends away from the support section 6520 along the third direction Z. The support plate 651 is connected to one end of the extension sections 6521 of the plurality of legs 652 that is away from the support section 6520. The reinforcing beam 500 is supported on the support plate 651 and fixed to the support plate 651 through fasteners.

[0219] Specifically, the number of legs 652 can be two, three, four, five or more. By providing a plurality of legs 652, the structural strength of the bracket 650 can be improved, and the force uniformity of the support plate 651 in the circumferential direction of the support plate 651 can be enhanced.

[0220] The bracket 650 can be an integrally formed part. The support plate 651 and the legs 652 can be connected by an arc. The support section 6520 and the extension section 6521 can also be connected by an arc. Thus, the stress concentration on the bracket 650 can be reduced.

[0221] The bracket 650 may include a support plate 651 and four legs 652. Two of the four legs 652 may be symmetrically arranged about the first direction X, and the other two legs 652 may be symmetrically arranged about the second direction Y. The support plate 651 may be arranged between the four legs 652 and connected to the extension sections 6521 of the four legs 652. The support section 6520 may be connected to one end of the extension section 6521 away from the support plate 651 in the third direction Z, and is located on the side of the extension section 6521 away from the support plate 651 in the thickness direction. In this way, the bracket 650 can be conveniently supported on the bottom wall 202 of the box body 200, and the mutual interference between the support sections 6520 of the multiple legs 652 can be reduced.

[0222] The support plate 651 may be provided with a third through hole that passes through the support plate 651 in the up-down direction. The reinforcing beam 500 may be covered on the upper side of the bracket 650 and supported on the support plate 651, and then fixedly connected to the support plate 651 through the third through hole by a fastener.

[0223] In this way, since the bracket 650 includes a support plate 651 and a plurality of legs 652 supporting the support plate 651 , the structure of the bracket 650 can be simplified, the support stability of the bracket 650 for the reinforcing beam 500 can be improved, and the fixed connection between the reinforcing beam 500 and the bracket 650 can be facilitated.

[0224] Please refer to Figure 2 , Figure 3 and Figure 4 In some embodiments, the battery device 1000 also includes a second expansion beam 700, which extends along the first direction X and is arranged at intervals with the first expansion beam 100 in the second direction Y, and the battery cell 300 is arranged between the first expansion beam 100 and the second expansion beam 700. The structure of the second expansion beam 700 is the same as or different from the structure of the first expansion beam 100.

[0225] Specifically, the battery device 1000 may include a plurality of columns of battery cells 300 sequentially arranged along a first direction X. Each column of battery cells 300 may include a plurality of battery cells 300 sequentially stacked along a second direction Y. The first expansion beam 100 and the second expansion beam 700 are respectively arranged on both sides of the plurality of battery cells 300 in the second direction Y, and are used to limit the expansion of the plurality of battery cells 300 in the second direction Y.

[0226] A first fixing point may be provided at the top of the first expansion beam 100. A second fixing point may be provided at the top of the second expansion beam 700. The first fixing point and the second fixing point may be connected by a tie rod. In this way, the anti-expansion force of the first expansion beam 100 and the second expansion beam 700 on the battery cell 300 can be enhanced, and the expansion of the battery cell 300 can be effectively suppressed.

[0227] Among them, the number of the first fixing points, the second fixing points and the tie rods can all be multiple. Multiple first fixing points, multiple second fixing points and multiple tie rods can correspond one by one.

[0228] In one embodiment, the second expansion beam 700 may include a first plate 10, a second plate 20 and a reinforcing plate 30. The reinforcing plate 30 is disposed between the first plate 10 and the second plate 20. The first plate 10, the second plate 20 and the reinforcing plate 30 can all be integrally formed independent components, and the first plate 10, the second plate 20 and the reinforcing plate 30 can be connected by welding.

[0229] Thus, since the battery device 1000 further includes the second expansion beam 700, the second expansion beam 700 can cooperate with the first expansion beam 100 to jointly inhibit the expansion of the battery cell 300 in the second direction Y.

[0230] Please refer to Figure 2 and Figure 3 , in a specific embodiment, the battery device 1000 includes a plurality of battery cells 300, a box body 200, a thermal management component 400, a first expansion beam 100, a second expansion beam 700, a first connecting plate 1001, a second connecting plate 1002, a mounting beam 600 and two tie rods.

[0231] Specifically, a plurality of battery cells 300 are disposed in the box body 200, and the plurality of battery cells 300 are fixed to the bottom wall 202 of the box body 200 by means of threaded connection. The first expansion beam 100 and the second expansion beam 700 are both disposed in the box body 200 and are both fixed to the side wall 201 of the box body 200. The first expansion beam 100 and the second expansion beam 700 both extend along the width direction of the box body 200 and are arranged at intervals in the length direction of the box body 200, and a plurality of battery cells 300 are disposed between the first expansion beam 100 and the second expansion beam 700.

[0232] Please refer to Figure 9 and Figure 10 , the first expansion beam 100 includes a first plate 10, a second plate 20 and a reinforcing plate 30. The first plate 10 is a plate-shaped member vertically disposed and extending left and right. The upper side edge of the first plate 10 is provided with a first flanging 11, the lower side edge is provided with a second flanging 12, and the left and right ends of the first plate 10 are respectively provided with first connection holes 13 penetrating through the first plate 10 in the front-rear direction.

[0233] The second plate 20 includes a main board 21 and a support board 22. The main board 21 is arranged on the upper side of the support board 22. The main board 21 is a vertically arranged and horizontally extending plate. The upper side edge of the main board 21 is provided with a third flanging 211, and the lower side edge is provided with a first folding edge 212. Second connection holes 213 that penetrate the main board 21 in the front-back direction are respectively formed at the left and right ends of the main board 21. The first folding edge 212 includes connecting portions 2123 and recessed portions 2122 that are alternately arranged in the left-right direction. The left and right ends of the recessed portion 2122 are respectively connected to the connecting portion 2123 and the middle part is recessed downward. Each recessed portion 2122 is formed with a first fixing hole 2121 that penetrates up and down. Two adjacent recessed portions 2122 and the connecting portion 2123 cooperate to define a recessed groove.

[0234] The support board 22 is a vertically arranged and horizontally extending plate. The upper side edge of the support board 22 is provided with a second folding edge 222, and the lower side edge is provided with a fourth flanging 221. The second folding edge 222 has a plurality of first lugs 2221 arranged at intervals in the left-right direction. An avoidance portion 2222 is defined between two adjacent first lugs 2221. The avoidance portion 2222 is a through groove provided on the second folding edge 222. The lower side edge of the support board 22 is formed with a first avoidance groove 223 that is recessed upward. The first avoidance groove 223 is located at the middle position of the support board 22 in the left-right direction.

[0235] Please refer to Figure 10 , the reinforcing plate 30 includes three flat portions 31, two bending portions 32 and a third flanging 33. The flat portion 31 is a flat plate that extends horizontally and is vertically arranged. The bending portion 32 is connected between two adjacent upper and lower flat portions 31. The cross section of the bending portion 32 is a U shape that opens towards the first plate 10. The third flanging 33 is horizontally arranged and is connected to the lower side edge of the lowermost flat portion 31. The third flanging 33 has a plurality of second lugs 331 arranged at intervals in the left-right direction. The plurality of second lugs 331, the plurality of first lugs 2221 and the plurality of connecting portions 2123 correspond one by one, and each second lug 331 is clamped between the corresponding connecting portion 2123 and the first lug 2221.

[0236] A plurality of welding holes are provided on the main board 21. The welding holes are long strip-shaped holes that extend in the left-right direction. The plurality of welding holes correspond to the bending portions 32 of the reinforcing plate 30. The main board 21 can be welded to the bending portions 32 of the reinforcing plate 30 at the positions of the plurality of welding holes.

[0237] There are two first connecting plates 1001, which are respectively arranged at both ends of the first plate 10 in the left - right direction. One end of the first connecting plate 1001 is connected to the first plate 10 through fasteners, and the other end is also connected to the side wall of the box body 200 in the left - right direction through fasteners. There are two second connecting plates 1002, which are respectively arranged at both ends of the main board 21 in the left - right direction. One end of the second connecting plate 1002 is fixedly connected to the second plate 20 through fasteners, and the other end is also connected to the side wall of the box body 200 in the left - right direction through fasteners.

[0238] Please refer to Figure 7 , the mounting beam 600 includes two parts located on both sides of the notch 610 and a bracket 650 arranged at the notch 610. Among them, the two parts of the mounting beam 600 are connected by a strengthening beam 500. The bracket 650 is a four - claw bracket, and the bracket 650 is used to support the strengthening beam 500. The strengthening beam 500 is provided with a second avoidance groove 530 for avoiding the thermal management component 400.

[0239] In the description of this specification, the description with reference to terms such as "one embodiment", "certain embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the said embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above - mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0240] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that: various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: Box; A battery cell is disposed in the box; A mounting beam is mounted on the box body and has a notch extending therethrough; a first expansion beam, which is installed in the box body through the mounting beam and cooperates with the battery cell, wherein the first expansion beam, the mounting beam and the bottom wall of the box body together form an avoidance channel connected to the notch; A thermal management component is disposed in the box body and cooperates with the battery monomer for heat exchange, the thermal management component includes an inlet portion and an outlet portion; at least one of the inlet portion and the outlet portion is disposed through the avoidance channel; Wherein, the battery device further comprises a reinforcing beam arranged at the notch, the reinforcing beam is connected to the wall bodies of the mounting beam located on both sides of the notch, and is connected to the first expansion beam.

2. The battery device according to claim 1, characterized in that: The reinforcing beam is placed transversely in the notch and is connected with the mounting beam to form walls on both sides of the notch; or, The reinforcing beam covers the notch and is connected to the walls on both sides of the mounting beam adjacent to the notch.

3. The battery device according to claim 1, characterized in that: The reinforcing beam includes a first reinforcing portion and a second reinforcing portion connected at an angle, the first reinforcing portion is connected to the mounting beam, and the second reinforcing portion is connected to the first expansion beam.

4. The battery device according to claim 3, characterized in that: The mounting beam includes a first beam, a second beam and a third beam connected in sequence at an angle, the first beam and the third beam are both connected to the bottom wall of the box body, and the first beam is closer to the battery cell than the third beam; the first reinforcement portion is connected to the third beam, and the second reinforcement portion is connected to the second beam.

5. The battery device according to claim 1, characterized in that: The number of the gaps is one or more; When there are multiple notches, there are multiple mounting beams, which correspond one to one with the multiple notches; or, When the number of the notches is plural, the number of the mounting beam is one, and one mounting beam is opposite to the plural notches.

6. The battery device according to claim 1, characterized in that: The thermal management component is formed by bending a heat exchange tube, and an inlet portion and an outlet portion of the heat exchange tube are arranged adjacent to each other, so that the inlet portion and the outlet portion of the heat exchange tube are both passed through the notch.

7. The battery device according to claim 6, characterized in that: There are multiple heat exchange tubes, and the multiple inlet portions and the multiple outlet portions of the multiple heat exchange tubes are all concentrated and adjacently arranged, and are commonly passed through one notch; or, The number of the heat exchange tubes is multiple, the number of the notches is also multiple, and the inlet and the outlet of each heat exchange tube are arranged in one notch.

8. The battery device according to claim 6, characterized in that: The heat exchange tube gradually extends from the outer periphery of the battery device toward the middle of the battery device and is bent.

9. The battery device according to claim 6, characterized in that: The number of the heat exchange tubes is multiple and they are arranged in parallel.

10. The battery device according to claim 6, characterized in that: A mounting groove is formed on the bottom wall, and the heat exchange tube is arranged in the mounting groove and extends along the extending direction of the mounting groove.

11. The battery device according to any one of claims 1 to 10, characterized in that: The first expansion beam includes a plurality of plates, each of which is a sheet metal part, and the plurality of plates are welded together to form the first expansion beam.

12. The battery device according to any one of claims 1 to 10, characterized in that: The first expansion beam includes a plurality of plates that are connected and arranged, and the plurality of plates respectively include: a first plate and a second plate, the first plate and the second plate extend along a first direction and are arranged in a second direction, and in a third direction, two ends of the first plate are respectively connected to two ends of the second plate and cooperate to define a cavity of the first expansion beam, and the first direction, the second direction and the third direction intersect each other.

13. The battery device according to claim 12, characterized in that: In the third direction, the two ends of the first plate have a first flange and a second flange extending toward the second plate, and the two ends of the second plate have a third flange and a fourth flange extending toward the first plate, the first flange is overlapped and connected to the third flange, and the second flange is overlapped and connected to the fourth flange.

14. The battery device according to claim 12, characterized in that: The second plate includes a main plate and a support plate which are separately arranged. The main plate is arranged on the side of the support plate in the third direction away from the bottom wall. The main plate is provided with a first folded edge extending away from the second plate along the second direction. The support plate is provided with a second folded edge extending away from the second plate along the second direction. The first folded edge and the second folded edge are stacked and connected.

15. The battery device according to claim 14, characterized in that: The first folded edge is formed with a plurality of first fixing holes penetrating the first folded edge along the third direction, and the plurality of first fixing holes are arranged at intervals along the first direction. The first expansion beam is connected to the mounting beam by fasteners passing through a portion of the first fixing holes, and the first expansion beam is connected to the reinforcing beam by fasteners passing through another portion of the first fixing holes.

16. The battery device according to claim 15, characterized in that: The first folded edge includes a plurality of connecting portions and a plurality of recessed portions, wherein the plurality of recessed portions are alternately arranged and connected with the plurality of connecting portions along the first direction, the recessed portions are formed by the first folded edge being recessed toward the support plate, and each of the recessed portions is formed with at least one first fixing hole. The second folding edge includes a plurality of first lugs extending away from the first plate along the second direction, the plurality of first lugs are arranged at intervals along the first direction, and an escape portion is defined between two adjacent first lugs. Wherein, the recessed portion is located in the avoiding portion, and the plurality of connecting portions correspond to and are connected to the plurality of first lugs one by one.

17. The battery device according to claim 14, characterized in that: The support plate has a first avoidance groove formed on one side edge away from the main board in the third direction, and is recessed toward the main board. The reinforcing beam has a second avoidance groove formed on it. The first avoidance groove and the second avoidance groove are arranged at intervals along the second direction, and both the first avoidance groove and the second avoidance groove are used to avoid the inlet and the outlet.

18. The battery device according to claim 14, characterized in that: The plurality of plate bodies further include a reinforcing plate extending along the first direction, the reinforcing plate being disposed between the first plate and the second plate and connected to the first plate and the second plate.

19. The battery device according to claim 18, characterized in that: The reinforcing plate includes a flat plate portion and a bent portion, wherein the flat plate portion is attached to and connected to a surface of the first plate, and the bent portion is connected to the flat plate portion and forms a U-shaped structure extending along the first direction and opening toward the first plate in the second direction.

20. The battery device according to claim 19, characterized in that There are multiple bending parts, and the multiple bending parts are arranged at intervals along the third direction. The flat plate part is connected between two adjacent bending parts and connected to both sides of the multiple bending parts in the third direction.

21. The battery device according to claim 19 or 20, characterized in that: The reinforcing plate also includes a third folded edge, which is connected to the flat plate portion. The third folded edge has a plurality of second lugs extending away from the first plate along the second direction. The plurality of second lugs are arranged at intervals along the first direction. The plurality of second lugs are clamped between the first folded edge and the second folded edge, and are welded to the first folded edge and the second folded edge.

22. The battery device according to claim 12, characterized in that: Also includes: A first connecting plate, the first connecting plate is fixed to the side wall of the box body by a fastener, the first plate is provided with first connecting holes penetrating the first plate along the second direction at both ends in the first direction, and the first plate is fastened and connected to the first connecting plate by a fastener passing through the first connecting holes; The second connecting plate is fixed to the side wall of the box body by fasteners, and the second plate is provided with second connecting holes penetrating the second plate along the second direction at both ends in the first direction, and the second plate is fastened and connected to the second connecting plate by fasteners passing through the second connecting holes.

23. The battery device according to claim 1, characterized in that The battery device also includes a bracket, which is fixed to the bottom wall and arranged at the notch, and the reinforcing beam is supported on the bracket.

24. The battery device according to claim 23, characterized in that The bracket includes a support plate and a plurality of legs, the plurality of legs are arranged along the circumference of the support plate, the legs include a support section and an extension section arranged in an L shape, the support section is connected to the bottom wall, the extension section extends away from the support section along a third direction, the support plate is connected to one end of the extension section of the plurality of legs away from the support section, and the reinforcing beam is supported on the support plate and fixed to the support plate by fasteners.

25. The battery device according to claim 1, characterized in that Also includes: A second expansion beam extends along a first direction and is spaced apart from the first expansion beam in a second direction, the battery cell is arranged between the first expansion beam and the second expansion beam, and the structure of the second expansion beam is the same as or different from that of the first expansion beam.

26. An electrical device, characterized in that: A battery device comprising any one of claims 1-25.

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