Battery device and electric device having the same

Abstract

A battery device (1000) and an electric device (1A) having the same, the battery device (1000) comprising: a main box (200) defining a containing cavity (201); a battery cell (300) disposed in the containing cavity (201); a mounting beam (600) mounted to a bottom wall (202) of the main box (200) and cooperatively forming an avoiding passage (203) with the bottom wall (202); a first expansion beam (100) detachably mounted to the mounting beam (600) and cooperatively engaging the battery cell (300); and a thermal management member (400) disposed in the containing cavity (201) and cooperatively exchanging heat with the battery cell (300), the thermal management member (400) having an inlet portion (411) and an outlet portion (412), at least one of the inlet portion (411) and the outlet portion (412) being disposed in the avoiding passage (203).

Description

Battery device and electric device with same TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric device with the same. BACKGROUND

[0002] In the related art, the assembly efficiency of the battery device box needs to be improved.

[0003] SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a battery device and an electric device with the same, wherein the heat management member can be installed prior to the first expansion beam, the mutual influence between the installation of the first expansion beam and the heat management member can be reduced, the installation efficiency is higher, and the first expansion beam and the mounting beam can be subjected to respective surface treatments, the flexibility of the surface treatment is improved, the processing cost is saved, and the production efficiency is improved.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising: a main box, the main box defining a containing cavity; a battery monomer, disposed in the containing cavity; a mounting beam, mounted to a bottom wall of the main box and forming an avoiding passage with the bottom wall; a first expansion beam, detachably mounted to the mounting beam and cooperating with the battery monomer; and a heat management member, disposed in the containing cavity and cooperating with the battery monomer in heat exchange, the heat management member having an inlet portion and an outlet portion, at least one of the inlet portion and the outlet portion penetrating the avoiding passage formed by the mounting beam.

[0006] In the above technical solution, on the one hand, the battery device is provided with the mounting beam, the first expansion beam is mounted to the main box through the mounting beam, and the inlet portion and the outlet portion of the heat management member penetrate out through the avoiding passage formed by the mounting beam, which makes the heat management member be installed prior to the first expansion beam, reduces the mutual influence between the installation of the first expansion beam and the heat management member, and improves the installation efficiency. On the other hand, since the first expansion beam and the mounting beam are detachably cooperated, the first expansion beam and the mounting beam can be subjected to respective surface treatments, such as corrosion-resistant treatment of the first expansion beam and insulation treatment of the mounting beam, the flexibility of the surface treatment is improved, the processing cost is saved, and the production efficiency is improved.

[0007] In some embodiments, the first expansion beam comprises a plurality of plate bodies, the plurality of plate bodies are sheet metal members, and the plurality of plate bodies are welded to be connected to constitute the first expansion beam.

[0008] In the technical scheme, the plurality of plate bodies are welded to form the first expansion beam, so that the structure of the first expansion beam is simplified, the first expansion beam is easy to process, and the cost is reduced; meanwhile, the plate body is a sheet metal part, so that the structural strength of the plate body and the first expansion beam is improved.

[0009] In some embodiments, the plurality of plate bodies include a first plate and a second plate, the first plate and the second plate extend along a first direction and are arranged along a second direction, and in a third direction, two ends of the first plate are connected to two ends of the second plate to cooperatively define a cavity of the first expansion beam, and the third direction, the first direction and the second direction are perpendicular to each other.

[0010] In the technical scheme, the plurality of plate bodies include a first plate and a second plate, the first plate and the second plate extend along a first direction and are arranged along a second direction, and in a third direction, two ends of the first plate are connected to two ends of the second plate to cooperatively define a cavity of the first expansion beam, and the third direction, the first direction and the second direction are perpendicular to each other.

[0011] In some embodiments, in the third direction, the two ends of the first plate have a first flange and a second flange extending towards the second plate, the two ends of the second plate have a third flange and a fourth flange extending towards the first plate, the first flange is connected to the third flange by lapping, and the second flange is connected to the fourth flange by lapping.

[0012] In the technical scheme, the first flange and the second flange of the first plate are connected to the third flange and the fourth flange of the second plate by lapping, so that the first plate and the second plate are easy to be welded, the structural strength of the welding position is improved, and the structural strength of the first expansion beam is improved.

[0013] In some embodiments, the second plate includes a main plate and a support plate arranged separately, the main plate is arranged on a side of the support plate away from the bottom wall in the third direction, the main plate is provided with a first folding edge extending away from the second plate along the second direction, the support plate is provided with a second folding edge extending away from the second plate along the second direction, and the first folding edge and the second folding edge are arranged in layers and connected.

[0014] In the technical scheme, the second plate includes a main plate and a support plate arranged separately, so that the production difficulty of the second plate is reduced, and the processing efficiency is improved; meanwhile, the main plate and the support plate are connected by lapping and welding through the first folding edge and the second folding edge, so that the structural strength of the second plate is improved, and the main plate and the support plate are easy to be welded.

[0015] In some embodiments, the first folding edge is formed with a plurality of first fixing holes penetrating through the first folding edge along the third direction, the plurality of first fixing holes are arranged at intervals along the first direction, and the first expansion beam is connected to the mounting beam by a fastener penetrating through the first fixing hole.

[0016] In the technical scheme, the first fold edge is provided with a plurality of first fixing holes for fastening connection with the mounting beam, so that the first expansion beam can be connected with the mounting beam through fasteners, and the plurality of first fixing holes can improve the reliability and uniformity of stress between the first expansion beam and the mounting beam.

[0017] In some embodiments, the first fold edge comprises a plurality of connecting portions and a plurality of recessed portions, the plurality of recessed portions are connected with the plurality of connecting portions and arranged alternately along the first direction, the recessed portions are recessed and formed on the first fold edge towards the support plate, each recessed portion is formed with at least one first fixing hole, the second fold edge comprises 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 avoiding gap is defined between two adjacent first lugs, wherein the recessed portion is located in the avoiding gap, and the plurality of connecting portions correspond to and are connected with the plurality of first lugs one by one.

[0018] In the technical scheme, the plurality of recessed portions can improve the structural strength of the first fold edge and improve the reliability when the first fold edge is connected with the main box, and the plurality of recessed portions and the plurality of connecting portions can cooperate to define a plurality of recessed grooves for accommodating the first lugs, so that the first lugs can be flush with the lower side surface of the recessed portion, or the recessed portion can protrude from the lower side surface of the first lug, so that the recessed portion can abut against the connected parts when connected with the mounting beam, thereby improving the reliability of fastening connection.

[0019] In some embodiments, the support plate is formed with an avoiding recess groove recessed towards the main plate along a side edge of the support plate in the third direction, and the avoiding recess groove is used for avoiding the inlet portion and the outlet portion.

[0020] In the technical scheme, the avoiding recess groove of the support plate for avoiding the inlet portion and the outlet portion of the heat exchange tube can reduce the mutual interference between the support plate and the inlet portion and the outlet portion, so that the layout is more compact and reasonable.

[0021] In some embodiments, the plurality of plate bodies further comprise a reinforcing plate, the reinforcing plate extends along the first direction, and the reinforcing plate is arranged between the first plate and the second plate and connected with the first plate and the second plate.

[0022] In the technical scheme, the reinforcing plate arranged between the first plate and the second plate can strengthen the overall structural strength of the first expansion beam and improve the anti-expansion effect on the battery monomer.

[0023] In some embodiments, the reinforcing plate comprises a flat plate portion and a bent portion, the flat plate portion is attached to and connected with the surface of the first plate, and the bent portion is connected with the flat plate portion and formed in a U-shaped structure extending along the first direction and opening towards the first plate in the second direction.

[0024] In the technical scheme, the reinforcing plate comprises the flat plate part connected with the first plate and the bent part bent towards the second plate, so that the reinforcing plate can be conveniently connected with the first plate and the second plate by welding, the structural strength of the reinforcing plate can be improved, and the overall strength of the first expansion beam can be improved.

[0025] In some embodiments, the number of bent parts is multiple, and the multiple bent parts are arranged at intervals along the first direction, and the flat plate part is connected between two adjacent bent parts and on both sides of the multiple bent parts in the first direction.

[0026] In the technical scheme, the multiple bent parts arranged on the reinforcing plate can further enhance the structural strength of the reinforcing plate and the structural strength of the first expansion beam, and can improve the uniformity of the structural reinforcement of the reinforcing plate on the first plate and the second plate in the height direction of the first expansion beam, and reduce the weak area of the strength of the first expansion beam.

[0027] In some embodiments, the reinforcing plate further comprises a third bent edge connected with the flat plate part, the third bent edge has multiple second lugs extending away from the first plate along the second direction, the multiple second lugs are arranged at intervals along the first direction, and the multiple second lugs are clamped between the first bent edge and the second bent edge and are connected with the first bent edge and the second bent edge by welding.

[0028] In the technical scheme, the reinforcing plate further comprises the third bent edge connected between the first bent edge and the second bent edge, the third bent edge can enhance the connection strength of the connection position of the first bent edge and the second bent edge, improve the reliability of the tight connection of the first bent edge with the main box, and meanwhile, the multiple second lugs arranged at intervals can define the avoiding hole of the avoiding recess of the first bent edge, and reduce the probability of interference between the third bent edge and the fastener arranged in the first fixing hole.

[0029] In some embodiments, the battery device further comprises a first connecting plate fixed to the side wall of the main box by the fastener, the first plate is provided with a first connecting hole penetrating the first plate along the second direction at both ends of the first plate in the first direction, and the first plate is connected with the first connecting plate by the fastener penetrating the first connecting hole; and a second connecting plate fixed to the side wall of the main box by the fastener, the second plate is provided with a second connecting hole penetrating the second plate along the second direction at both ends of the second plate in the first direction, and the second plate is connected with the second connecting plate by the fastener penetrating the second connecting hole.

[0030] In the technical scheme, the battery device further comprises the first connecting plate and the second connecting plate, and the two sides of the first expansion beam in the thickness direction are fixed to the inner wall of the main box by the first connecting plate and the second connecting plate, so that the tight connection of the first expansion beam with the main box can be conveniently realized, and the connection reliability between the first expansion beam and the main box can be improved.

[0031] In some embodiments, the mounting beam extends along a first direction and is arranged on a side of the first expansion beam away from the battery cell along a second direction, and the first expansion beam is connected to the mounting beam by fasteners and / or adhesive connection, and the first direction intersects the second direction.

[0032] In the above technical solution, since the first expansion beam is connected to the mounting beam by fasteners and / or adhesive connection, not only can the assembly between the first expansion beam and the mounting beam be facilitated, and the assembly efficiency be improved, but also the surface pretreatment required by the first expansion beam and the mounting beam can be respectively performed, so as to improve the corrosion resistance and insulation performance of the first expansion beam and the mounting beam, thereby the flexibility of surface treatment can be improved, the processing cost can be saved, and the production efficiency can be improved. In addition, the first expansion beam and the mounting beam are fixedly connected by fasteners and an adhesive layer, so that the connection reliability and stability between the first expansion beam and the mounting beam can be further improved.

[0033] In some embodiments, the first expansion beam has a first folded edge extending towards the mounting beam, the first folded edge is supported on the top of the mounting beam, and the first folded edge is connected to the mounting beam by fasteners.

[0034] In the above technical solution, since the mounting beam is arranged on one side of the first expansion beam in the thickness direction, and the first expansion beam is fixedly connected to the top of the mounting beam by the first folded edge, the first folded edge can play a positioning role, facilitating the fixation of the first expansion beam on the mounting beam and improving the assembly efficiency.

[0035] In some embodiments, the mounting beam includes two first beams, both of which extend along the first direction and are arranged at intervals in the first direction, both of which are fixed to the bottom wall, and an avoidance channel is formed between the two first beams.

[0036] In the above technical solution, since the mounting beam includes two first beams arranged at intervals, and the avoidance channel is formed between the two first beams, the avoidance channel can be conveniently formed, the inlet and outlet portions of the heat exchange tube can be conveniently connected to the current collector through the mounting beam, the structure is simplified, and the forming difficulty of the avoidance channel is reduced.

[0037] In some embodiments, the first beam includes a beam body, a first support edge and a second support edge, the beam body extends along the first direction and has a U-shaped cross section, the first support edge and the second support edge are respectively connected to the two side edges of the opening of the beam body and extend away from each other, both of which are connected to the bottom wall, the first support edge is located on the side of the beam body facing the first expansion beam, and the bottom surface of the first expansion beam in the third direction is supported on the first support edge.

[0038] In the technical scheme, the first beam comprises a beam body in a U shape and a first supporting edge and a second supporting edge connected to both sides of the opening of the beam body, so that the structural strength of the first beam is improved, and the supporting stability between the first beam and the bottom wall of the accommodating cavity is increased, and the first beam is conveniently fastened and connected with the main box through the first supporting edge and / or the second supporting edge.

[0039] In some embodiments, the first supporting edge is adhesively connected with the bottom surface of the first expansion beam through an adhesive layer, and / or the side surface of the beam body in the second direction towards the first supporting edge is adhesively connected with the first expansion beam through an adhesive layer.

[0040] In the technical scheme, the adhesive layer is arranged on the surface of the first supporting edge and / or the side surface of the beam body, so that the adhesive connection between the first expansion beam and the first beam of the mounting beam is achieved, the adhesive connection between the first expansion beam and the mounting beam is further achieved, the connection reliability between the first expansion beam and the mounting beam is further improved, the assembly difficulty is reduced, and the assembly efficiency is improved.

[0041] In some embodiments, the mounting beam further comprises a connecting beam extending in the first direction and connected between the two first beams, the connecting beam is spaced apart from the inner wall of the accommodating cavity, and the connecting beam, the two first beams and the bottom wall enclose an avoiding passage.

[0042] In the technical scheme, the mounting beam further comprises the connecting beam connected between the two mounting beams, so that the mounting beam can be a continuous beam structure in the first direction, the first expansion beam can be continuously supported in the first direction, the supporting stability of the mounting beam to the first expansion beam is improved, and the avoiding passage is conveniently defined.

[0043] In some embodiments, the mounting beam further comprises a support fixed to the bottom wall and arranged between the two first beams, and the connecting beam is supported on the support.

[0044] In the technical scheme, the support is arranged between the two first beams to support the connecting beam, so that the supporting effect of the connecting beam is improved, the structural strength of the connecting beam is enhanced, and the structural strength of the first expansion beam is further enhanced.

[0045] In some embodiments, the support comprises a support plate and a plurality of support legs arranged along the circumference of the support plate, the support leg comprises a supporting segment and an extending segment arranged in an L shape, the supporting segment is connected to the bottom wall, the extending segment extends away from the supporting segment in a third direction, the support plate is connected to one end of the extending segment of the plurality of support legs away from the supporting segment, and the connecting beam is supported on the support plate and fixed to the support plate through a fastener.

[0046] In the above technical solution, since the support includes a support plate and multiple legs supporting the support plate, the structure of the support can be simplified, the support stability of the support for the connecting beam can be improved, and the connection between the connecting beam and the support can be conveniently fixed.

[0047] In some embodiments, the battery device further includes: a second expansion beam extending along a first direction and spaced apart from the first expansion beam in a second direction, a battery cell being disposed between the first expansion beam and the second expansion beam, and the structure of the second expansion beam being the same as or different from the structure of the first expansion beam.

[0048] In the above technical solution, the battery device also includes a second expansion beam, which can cooperate with the first expansion beam to jointly suppress the expansion of the battery cell in the second direction.

[0049] In some embodiments, the thermal management component includes a heat exchange tube with a mounting groove formed on its bottom wall, the heat exchange tube being disposed within the mounting groove and extending along the extension direction of the mounting groove.

[0050] In the above technical solution, since an installation groove is formed on the bottom wall of the main box and the heat exchange tube is placed in the installation groove, the heat exchange tube can be conveniently arranged, the space occupied by the heat exchange tube in the cavity can be reduced, the structure is compact, and the energy density of the battery device can be improved.

[0051] Secondly, embodiments of this application provide an electrical device, including a battery device according to the first aspect of this application.

[0052] In the above embodiments, by providing the battery device described in the first aspect, and because the battery device is equipped with a mounting beam, the first expansion beam is mounted on the main housing via the mounting beam. The inlet and outlet of the thermal management component pass through the clearance channel formed by the mounting beam. This allows the thermal management component to be installed before the first expansion beam, reducing the mutual influence between the installation of the expansion beam and the installation of the thermal management component, and improving installation efficiency. On the other hand, since the first expansion beam and the mounting beam are detachably connected, the first expansion beam and the mounting beam can be subjected to their respective required surface treatments. For example, the first expansion beam can be subjected to anti-corrosion treatment, and the mounting beam can be subjected to insulation treatment, which can improve the flexibility of surface treatment, save processing costs, and improve production efficiency.

[0053] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0054] Figure 1 is a schematic diagram of a vehicle according to an embodiment of this application;

[0055] Figure 2 is a schematic diagram of a battery device according to an embodiment of this application;

[0056] Figure 3 is a schematic diagram of a battery device according to an embodiment of this application that does not include individual battery cells;

[0057] Figure 4 is a schematic diagram of the battery device shown in Figure 3 from another angle;

[0058] Figure 5 is a schematic diagram of the first expansion beam shown in Figure 3;

[0059] Figure 6 is an exploded view of the first expansion beam shown in Figure 3;

[0060] Figure 7 is a partial enlarged view of the battery device shown in Figure 3;

[0061] Figure 8 is a partial enlarged view of the battery device shown in Figure 4;

[0062] Figure 9 is a schematic diagram of the main casing, mounting beam, and second expansion beam of the battery device according to an embodiment of this application;

[0063] Figure 10 is a schematic diagram of the battery device shown in Figure 9 excluding the connecting beam;

[0064] Figure 11 is an enlarged view of point C circled in Figure 10.

[0065] Figure label:

[0066] 1A. Electrical appliances;

[0067] 1000, Battery assembly; 2000, Controller; 3000, Motor;

[0068] 100. First expansion beam;

[0069] 10. First plate; 11. First flange; 12. Second flange; 13. First connecting hole;

[0070] 20. Second plate; 213. Second connecting hole;

[0071] 21. Main board; 211. Third flange; 212. First folded edge; 2121. First fixing hole; 2122. Recess; 2123. Connecting part;

[0072] 22. Support plate; 221. Fourth flange;

[0073] 222, Second fold; 2221, First lug; 2222, Avoidance notch; 223, Avoidance groove;

[0074] 30. Reinforcing plate; 31. Flat plate section; 32. Bending section; 33. Third fold; 331. Second lug;

[0075] 200. Main housing; 201. Receiving cavity; 202. Bottom wall; 203. Clearance passage; 204. Mounting slot;

[0076] 300, battery cell;

[0077] 400. Thermal management components; 410. Heat exchanger tubes; 411. Inlet section; 412. Outlet section; 420. Current collector;

[0078] 510. First connecting plate; 520. Second connecting plate;

[0079] 600. Install the beam;

[0080] 610. First beam; 611. Beam body; 612. First supporting edge; 613. Second supporting edge;

[0081] 620. Connecting beam;

[0082] 630, bracket; 631, support plate; 632, support leg; 6321, support section; 6322, extension section;

[0083] 700, Second Expansion Beam;

[0084] 800, Adhesive layer;

[0085] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0086] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0087] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0088] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0089] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0090] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0091] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0092] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0093] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0094] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0095] In a battery, multiple battery cells are housed inside a casing. When a battery cell is in operation, the inside of the battery cell will expand. In order to limit the position of the battery cell and reduce the amount of expansion, expansion beams are provided at both ends of the direction in which the multiple battery cells are stacked inside the casing. The two expansion beams abut against the two sides of the multiple battery cells to fix the position of the multiple battery cells and improve the stability of the battery cells.

[0096] Meanwhile, in order to ensure that the battery cells operate under suitable temperature conditions, thermal management components are installed inside the battery housing. These components include heat exchangers and current collectors. When the thermal management components are directly built into the housing, the heat exchangers and current collectors are usually arranged on both sides of the expansion beam. For example, when the heat exchangers are placed between the bottom wall of the housing and the battery cells, the current collectors are located on the side of the expansion beam away from the battery cells.

[0097] During battery assembly, adhesive needs to be applied to the top of the heat exchange tubes to contact the bottom of the battery cells. If air bubbles or insufficient adhesive coverage occur during the application process, the bottom of the battery cells may directly contact the heat exchange components, leading to insulation and voltage withstand failure of the battery system. Therefore, insulating spraying is required on the contact areas between the housing, cold plate, and modules. Additionally, for sheet metal housings, to ensure they do not rust during long-term use, the entire housing must undergo surface electrophoresis treatment.

[0098] For heat exchange components with U-shaped heat exchange tubes built into the sheet metal enclosure, structural adhesive must be applied to the interface between the bottom of the heat exchange component and the enclosure to ensure good adhesion between the heat exchange component and the enclosure without deformation or warping. The inlet and outlet of the U-shaped heat exchange tube must be located on the outside of the expansion beam, and the expansion beam on the inlet and outlet side of the heat exchange tube must avoid the inlet and outlet of the U-shaped heat exchange tube. Therefore, during assembly, the heat exchange component must be installed on the bottom plate of the enclosure first, and then the expansion beam must be welded.

[0099] In related technologies, the enclosure is manufactured using the following method.

[0100] Option 1: No treatment is done on the surface of the heat exchanger and the housing. After applying adhesive to the interface between the heat exchanger and the housing, the heat exchanger is bonded to the housing. The expansion beam is then welded, and the entire housing is placed in an electrophoresis pool for electrophoresis. After electrophoresis, the contact area between the housing and the module is then coated with insulating paint.

[0101] However, in this solution: the electrophoretic solution cannot penetrate the interface between the housing and the heat exchanger, posing a long-term risk of corrosion; after applying adhesive to the interface between the heat exchanger and the housing before electrophoresis, the electrophoretic solution will wash away the adhesive, resulting in poor adhesion between the heat exchanger and the housing; after electrophoresis, insulation spraying is applied, but since insulation spraying must be carried out at high temperatures, the high temperature will melt the structural adhesive, which will also lead to poor connection between the housing and the heat exchanger.

[0102] Option 2 involves first applying an insulating spray coating to the surface of the heat exchange components, pre-applying electrophoresis to the expansion beams and main body of the housing, pre-applying an insulating spray coating to the contact area between the housing and the battery cells, applying adhesive to the interface between the heat exchange components and the housing, and then bonding the heat exchange components to the housing. At this point, the expansion beams are welded.

[0103] However, in this scheme, since both the expansion beam and the bottom plate of the box are coated with electrophoretic paint, the expansion beam and the box cannot be welded, which affects the reliability of the connection between the expansion beam and the box.

[0104] Based on the above considerations, in order to achieve a reliable connection between the expansion beam and the main box after completing the surface treatment of the expansion beam and the main box, this application designs a battery device. An installation beam is provided inside the main box, forming a clearance channel between the installation beam and the bottom wall of the main box. The inlet and outlet of the thermal management component pass through the clearance channel. The first expansion beam is detachably installed on the installation beam. When assembling the battery device, the main box, the first expansion beam, and / or the installation beam can be pre-coated with electrophoresis and / or insulating spraying. Then, the thermal management component is embedded in the bottom wall of the main box, the installation beam is installed, and finally, the first expansion beam is fixed to the installation beam. Thus, on the one hand... The battery assembly is equipped with a mounting beam. The first expansion beam is mounted to the main housing via the mounting beam. The inlet and outlet of the thermal management component pass through the clearance channel formed by the mounting beam. This allows the thermal management component to be installed before the first expansion beam, reducing the mutual interference between the installation of the expansion beam and the installation of the thermal management component, and improving installation efficiency. On the other hand, since the first expansion beam and the mounting beam are detachable, they can each undergo their respective required surface treatments. For example, the first expansion beam can be treated with anti-corrosion treatment, and the mounting beam can be treated with insulation treatment, which can improve the flexibility of surface treatment, save processing costs, and improve production efficiency.

[0105] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells, and when there are multiple battery cells, they are connected in series, parallel, or mixed connections via a busbar.

[0106] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0107] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0108] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0109] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0110] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0111] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0112] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0113] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0114] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0115] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the electrical device 1A and the battery device of this application in detail.

[0116] Please refer to Figure 1, which is a schematic diagram of the structure of an electrical device 1A for a vehicle according to some embodiments of this application. The vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with a battery device 1000, which can be located at the bottom, front, or rear of the vehicle. The battery device 1000 can be used to supply power to the vehicle; for example, it can serve as the vehicle's operating power source. The vehicle may also include a controller 2000 and a motor 3000. The controller 2000 controls the battery device 1000 to supply power to the motor 3000, for example, to meet the vehicle's power needs during starting, navigation, and driving. In some embodiments of this application, the battery device 1000 can not only serve as the vehicle's operating power source but also as its driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle.

[0117] The battery device 1000 according to an embodiment of the first aspect of this application is described below with reference to Figures 2-8. Referring to Figure 2, Figure 2 is a structural schematic diagram of the battery device 1000 provided in some embodiments of this application. Figure 3 is a schematic diagram of the battery device 1000 according to an embodiment of this application without the battery cell 300; Figure 4 is a schematic diagram of the battery device 1000 shown in Figure 3 from another angle; Figure 5 is a schematic diagram of the first expansion beam 100 shown in Figure 3; Figure 6 is an exploded view of the first expansion beam 100 shown in Figure 5; Figure 7 is a partial enlarged view of the battery device 1000 according to an embodiment of this application; Figure 8 is a partial enlarged view of the battery device 1000 shown in Figure 4; Figure 9 is a schematic diagram of the main casing 200, mounting beam 600 and second expansion beam 700 of the battery device 1000 according to an embodiment of this application; Figure 10 is a schematic diagram of the battery device 1000 shown in Figure 9 without the connecting beam 620; Figure 11 is an enlarged view of the circled area C in Figure 10.

[0118] For ease of description, the length direction of the first expansion beam 100 (width direction of the main box 200) is defined as the first direction X, the thickness direction of the first expansion beam 100 (length direction of the main box 200) as the second direction Y, and the height direction of the first expansion beam 100 (height direction of the main box 200) as the third direction Z. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other. 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.

[0119] This application provides a battery device 1000. The battery device 1000 includes: a main casing 200, a battery cell 300, a thermal management component 400, a mounting beam 600, and a first expansion beam 100.

[0120] As shown in Figures 3 and 4, the main box 200 defines a receiving cavity 201; the battery cell 300 is disposed in the receiving cavity 201; the mounting beam 600 is mounted on the bottom wall 202 of the main box 200, and together with the bottom wall 202, they form a clearance channel 203; the first expansion beam 100 is detachably mounted on the mounting beam 600, and the first expansion beam 100 cooperates with the battery cell 300; the thermal management component 400 is disposed in the receiving cavity 201, and the thermal management component 400 cooperates with the battery cell 300 in heat exchange; the thermal management component 400 has an inlet 411 and an outlet 412, at least one of the inlet 411 and the outlet 412 passing through the clearance channel 203.

[0121] For example, the main casing 200 can be a hollow structure open to the Z-axis. The interior space of the main casing 200 is a receiving cavity 201, which can be used to arrange multiple battery cells 300, thermal management components 400, and other electrical components for the battery assembly 1000. In some examples, before assembling the battery assembly 1000, the main casing 200 can undergo pre-electrophoresis to form an electrophoretic coating on its surface, which can improve the corrosion resistance of the main casing 200.

[0122] The number of battery cells 300 can be multiple, and multiple battery cells 300 can constitute multiple battery cell assemblies. Multiple battery cell assemblies are arranged sequentially along a first direction. Each battery cell assembly can include multiple battery cells 300 stacked along a second direction. The first expansion beam 100 and the mounting beam 600 can be arranged on one side of the multiple battery cells 300 in the second direction.

[0123] The mounting beam 600 is disposed in the receiving cavity 201. The mounting beam 600 extends along the first direction X. The mounting beam 600 is fixed to the bottom wall 202 and cooperates with the bottom wall 202 to define the avoidance passage 203.

[0124] The mounting beam 600 is fixed to the bottom wall 202. For example, the mounting beam 600 can be connected to the bottom wall 202 of the receiving cavity 201 by fasteners. The two ends of the mounting beam 600 in the first direction X can be fixedly connected to the side wall of the receiving cavity 201. For example, the two ends of the mounting beam 600 in the first direction X can be connected to the side wall of the receiving cavity 201 by fasteners or by welding.

[0125] The first expansion beam 100 extends along a first direction and is detachably mounted on the mounting beam 600. For example, the first expansion beam 100 can be connected to the mounting beam 600 by fasteners, or it can be snap-fitted and / or adhesively bonded to the mounting beam 600. This fixation and support of the first expansion beam 100 on the mounting beam 600 facilitates connection between the first expansion beam 100 and the main housing 200, improving installation efficiency. Furthermore, the mounting beam 600 enhances the structural strength of the first expansion beam 100, thereby strengthening its resistance to expansion of the battery cells 300.

[0126] Since the first expansion beam 100 and the mounting beam 600 are detachably connected, at least one of the first expansion beam 100 and the mounting beam 600 can be pre-treated individually. For example, at least one of the first expansion beam 100 and the mounting beam 600 can be subjected to electrophoretic treatment and / or insulating spraying. The surface treatment of the first expansion beam 100 and / or the mounting beam 600 can be performed on a portion of the surface of the first expansion beam 100 and the mounting beam 600, or it can be performed on the entire surface of the first expansion beam 100 and / or the mounting beam 600. This improves the corrosion resistance and insulation performance of the first expansion beam 100 and / or the mounting beam 600.

[0127] In one example, the first expansion beam 100 and the mounting beam 600 can be subjected to their respective required surface treatments, such as anti-corrosion treatment (e.g., electrophoresis) on the first expansion beam 100 and insulation treatment (e.g., insulating spraying) on ​​the mounting beam 600. This can improve the flexibility of surface treatment of the first expansion beam 100 and the mounting beam 600, save processing costs of the first expansion beam 100 and the mounting beam 600, and improve production efficiency.

[0128] The thermal management component 400 is disposed within the receiving cavity 201, for example, at the bottom wall 202. The thermal management component 400 includes one or more heat exchange tubes 410, which can be flat tubes. When the battery cell 300 is disposed within the receiving cavity 201, the thermal management component 400 can be used to exchange heat with the battery cell 300 to ensure that the battery cell 300 operates within a suitable temperature range. When the battery device 1000 is operating, external heat exchange fluid can enter the heat exchange tube 410 from the inlet 411, exchange heat with the battery cell 300, and then flow out from the outlet 412.

[0129] In this configuration, at least one of the inlet section 411 and the outlet section 412 is installed within the clearance passage 203. That is, only the inlet section 411, only the outlet section 412, or both can be installed within the clearance passage 203 to facilitate connection between the inlet section 411 and the outlet section 412 of the thermal management component 400 and external piping. Alternatively, the inlet section 411 and the outlet section 412 can be installed within the same clearance passage 203, or they can be installed in different clearance passages 203.

[0130] The heat management component 400 may further include a collector 420. The collector 420 and the heat exchange tube 410 are respectively arranged on both sides of the first expansion beam 100 in the second direction. In order to connect the inlet 411 and outlet 412 of the heat exchange tube 410 with the collector 420, in this embodiment, the first expansion beam 100 is provided on the mounting beam 600. In this way, the mounting beam 600 can raise the first expansion beam 100, so that the first expansion beam 100 is separated from the bottom wall 202 of the main box 200. At the same time, the mounting beam 600 and the bottom wall 202 of the main box 200 cooperate to define a clearance channel 203. The clearance channel 203 connects the two sides of the mounting beam 600 in the second direction Y. The inlet 411 and outlet 412 of the heat exchange tube 410 can pass through the clearance channel 203 from one side of the mounting beam 600 and extend to the other side of the mounting beam 600 to connect with the collector 420 located on the other side of the mounting beam 600.

[0131] During the assembly of the battery device 1000, the main housing 200, the first expansion beam 100, and / or the mounting beam 600 can be surface-treated (e.g., with insulating spraying and electrophoresis). Then, at least a portion of the mounting beam 600 can be installed onto the main housing 200, so that the main housing 200 and the mounting beam 600 cooperate to define a clearance channel 203. Then, the thermal management component 400 is placed inside the main housing 200, and the inlet 411 and outlet 412 of the thermal management component 400 extend out from the clearance channel 203. Next, the first expansion beam 100 is installed onto the mounting beam 600. In this way, during the assembly of the battery device 1000 in this embodiment, the thermal management component 400 can be installed into the main housing 200 before the first expansion beam 100, thereby reducing the mutual interference between the installation of the first expansion beam 100 and the installation of the thermal management component 400 and improving the installation efficiency.

[0132] In another example, during the assembly of the battery device 100, after the surface treatment of the main housing 200, the first expansion beam 100, and / or the mounting beam 600 is completed, the thermal management component 400 can be installed into the main housing 200 first, so that the inlet 411 and outlet 412 of the thermal management component 400 are located in the predetermined clearance channel 203 position of the mounting beam 600, and then the mounting beam 600 is installed, and finally the first expansion beam 100 is installed. In this way, the thermal management component 400 can be preferably installed in the main housing 200 before the mounting beam 600 and the first expansion beam 100, thereby reducing the impact of the installation of the first expansion beam 100 on the installation of the thermal management component 400 and improving the installation efficiency.

[0133] In the above technical solution, on the one hand, the battery device 1000 is provided with a mounting beam 600, and the first expansion beam 100 is mounted on the main box 200 through the mounting beam 600. The inlet 411 and outlet 412 of the thermal management component 400 pass through the avoidance channel 203 formed by the mounting beam 600. This allows the thermal management component 400 to be installed before the first expansion beam 100, which can reduce the mutual influence between the installation of the first expansion beam 100 and the installation of the thermal management component 400, and improve the installation efficiency. On the other hand, since the first expansion beam 100 and the mounting beam 600 are detachably connected, the first expansion beam 100 and the mounting beam 600 can be subjected to their respective required surface treatments. For example, the first expansion beam 100 can be subjected to anti-corrosion treatment, and the mounting beam 600 can be subjected to insulation treatment, which can improve the flexibility of surface treatment, save processing costs, and improve production efficiency.

[0134] In some embodiments of this application, the first expansion beam 100 includes multiple plates (such as the first plate 10, the second plate 20 and the reinforcing plate 30 described below), all of which are sheet metal parts, and the multiple plates are welded together to form the first expansion beam 100.

[0135] For example, as shown in Figures 5 and 6, the first expansion beam 100 may include two, three, four, five, six or more plates. The plates are sheet metal parts, that is, metal plates. For example, the plates may be steel plates, and further, the plates may be steel plates with a yield strength greater than or equal to 340 MPa and a tensile strength greater than or equal to 590 MPa.

[0136] When manufacturing the first expansion beam 100, multiple plates of the first expansion beam 100 can be processed from sheet metal substrate, then the multiple plates can be welded together, and finally, the welded first expansion beam 100 can be placed in an electrophoresis pool for electrophoresis.

[0137] In the above technical solution, since multiple plates are welded together to form an integral first expansion beam 100, the structure of the first expansion beam 100 can be simplified, the first expansion beam 100 can be easily processed and formed, and the cost can be reduced; at the same time, the plates are set as sheet metal parts, which can improve the structural strength of the plates and the structural strength of the first expansion beam 100.

[0138] In some embodiments of this application, the multiple plates 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, the two ends of the first plate 10 are respectively connected to the two ends of the second plate 20, and cooperate to define the cavity of the first expansion beam 100. The third direction Z intersects the first direction X and the second direction Y in pairs.

[0139] Specifically, as shown in Figures 5 and 6, the first plate 10 and the second plate 20 are plate-shaped extending along the length and height directions of the first expansion beam 100. The first plate 10 and the second plate 20 are arranged along the thickness direction of the first expansion beam 100. The two ends of the first plate 10 in the height direction of the first expansion beam 100 are respectively connected to the two ends of the second plate 20 in the height direction of the first expansion beam 100, forming a hollow first expansion beam 100. That is, the first expansion beam 100 is a hollow beam. Thus, compared with an extruded expansion beam, the first expansion beam 100 of this embodiment has a simpler structure, is easier to process, and has lower cost.

[0140] It should be noted that the intersection of the third direction Z with the first direction X and the second direction Y in pairs indicates that the first direction X and the second direction Y are arranged at an angle, and the angle between the first direction X and the second direction Y is greater than 0° and less than 180°. For example, the angle between the first direction X and the second direction Y can be 30°, 60°, 90°, 120°, or 150°. Similarly, the intersection of the third direction Z with the first direction X in pairs indicates that the angle between the third direction Z and the first direction X is greater than 0° and less than 180°. For example, the angle between the third direction Z and the first direction X can be 30°, 60°, 90°, 120°, or 150°. Likewise, the intersection of the third direction Z with the second direction Y in pairs indicates that the angle between the third direction Z and the second direction Y is greater than 0° and less than 180°. For example, the angle between the third direction Z and the second direction Y can be 30°, 60°, 90°, 120°, or 150°.

[0141] In the above technical solution, since the multiple first plates 10 include a first plate 10 and a 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, making it easier to process and reducing costs.

[0142] In some embodiments of this application, on the third direction Z, the first plate 10 has a first flange 11 and a second flange 12 extending toward the second plate 20 at both ends, and the second plate 20 has a third flange 211 and a fourth flange 221 extending toward the first plate 10 at both ends, the first flange 11 and the third flange 211 are connected together, and the second flange 12 and the fourth flange 221 are connected together.

[0143] As shown in Figures 5 and 6, the first plate 10 has a first flange 11 and a second flange 12 formed at both ends of the first expansion beam 100 in the height direction. Both the first flange 11 and the second flange 12 extend towards the second plate 20 along the thickness direction of the first expansion beam 100. The first flange 11 and the second flange 12 can be formed by bending the two 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 that opens towards the second plate 20.

[0144] The second plate 20 has a third flange 211 and a fourth flange 221 formed at both ends of the first expansion beam 100 in the height direction. Both the third flange 211 and the fourth flange 221 extend toward the first plate 10 along the thickness direction of the first expansion beam 100. The third flange 211 and the fourth flange 221 can be formed by bending the two ends of the second plate 20 toward the first plate 10. At this time, the cross section of the second plate 20 perpendicular to the length direction is a U-shape that opens toward the first plate 10.

[0145] When assembling the first plate 10 and the second plate 20, the first flange 11 and the third flange 211 are stacked and welded together in the height direction of the first expansion beam 100, and the second flange 12 and the fourth flange 221 are stacked and welded together in the height direction of the first expansion beam 100. This facilitates the welding connection between the first plate 10 and the second plate 20, making it easier to form the first expansion beam 100 into a beam with a cavity. Furthermore, the lap welding of the first flange 11 and the third flange 211, and the lap welding of the second flange 12 and the fourth flange 221, can also improve the connection strength between the first plate 10 and the second plate 20, enhancing the overall strength of the first expansion beam 100.

[0146] In the above technical solution, since the first flange 11 and the second flange 12 of the first plate 10 are respectively connected to the third flange 211 and the fourth flange 221 of the second plate 20, the structure is simple and can be easily welded to the first plate 10 and the second plate 20, which can improve the structural strength of the welding position and improve the structural strength of the first expansion beam 100.

[0147] In some embodiments of this application, the second plate 20 includes a main plate 21 and a support plate 22 that are separately disposed. The main plate 21 is disposed on the side of the support plate 22 facing away from the bottom wall 202 in the third direction Z. The main plate 21 has a first folded edge 212 extending away from the second plate 20 in the second direction Y. The support plate 22 has a second folded edge 222 extending away from the second plate 20 in the second direction Y. The first folded edge 212 and the second folded edge 222 are stacked and connected.

[0148] As shown in Figures 5 and 6, the main board 21 and the support plate 22 are arranged along the height direction of the first expansion beam 100. The main board 21 is a plate extending along the length and height directions of the first expansion beam 100. The support plate 22 is connected to the side of the main board 21 facing the heat exchange tube 410. The main board 21 and the support plate 22 are independent components, and they can be connected by welding. The separate main board 21 and the support plate 22 can reduce the processing difficulty of the second plate 20 and improve production efficiency.

[0149] Furthermore, the main board 21 has a first folded edge 212 on one side edge facing the support plate 22, and the support plate 22 has a second folded edge 222 on one side edge facing the main board 21. The first folded edge 212 and the second folded edge 222 are overlapped and connected. For example, the first folded edge 212 and the second folded edge 222 are stacked and welded together in the height direction of the first expansion beam 100. This not only improves the connection reliability between the main board 21 and the support plate 22, but also improves the structural strength of the second plate 20 and enhances the structural strength of the first expansion beam 100.

[0150] Furthermore, both the first fold 212 and the second fold 222 extend away from the cavity in the thickness direction of the first expansion beam 100. Thus, the first fold 212 and the second fold 222 can be located outside the cavity, which facilitates the welding operation of the first fold 212 and the second fold 222.

[0151] In addition, the third flange 211 is formed on the side edge of the motherboard 21 opposite to the support plate 22, and the fourth flange 221 is formed on the side edge of the support plate 22 opposite to the motherboard 21.

[0152] In the above technical solution, by making the second plate 20 include a main plate 21 and a support plate 22 that are separately arranged, 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 overlap and welded together by the first fold 212 and the second fold 222 respectively, the structural strength of the second plate 20 can be improved and the welding connection between the main plate 21 and the support plate 22 can be facilitated.

[0153] In some embodiments of this application, the first folded edge 212 is formed with a plurality of first fixing holes 2121 that pass through the first folded edge 212 along the third direction Z. 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 the first fixing holes 2121.

[0154] As shown in Figures 5 and 6, the first folded edge 212 extends along the length and thickness directions of the first expansion beam 100. The first folded edge 212 is provided with multiple first fixing holes 2121. For example, the first folded edge 212 may have two, four, six, eight, ten, twelve, fourteen, or more first fixing holes 2121, which are spaced apart along the length of the first expansion beam 100. During assembly, the first expansion beam 100, welded as a single unit and electrophoretically coated, is placed inside the main housing 200. Then, multiple fasteners pass through the corresponding first fixing holes 2121 and connect to the mounting beam 600.

[0155] The fasteners can be bolts or rivet nuts, etc. The first fixing hole 2121 can be a circular hole or other polygonal holes.

[0156] In the above technical solution, the first folded edge 212 is provided with a plurality of first fixing holes 2121 for fastening connection with the mounting beam 600. Thus, the first expansion beam 100 and the mounting beam 600 can be easily connected by 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 uniformity of the force.

[0157] In some embodiments of this application, the first folded edge 212 includes a plurality of connecting portions 2123 and a plurality of recesses 2122. The plurality of recesses 2122 and the plurality of connecting portions 2123 are alternately arranged and connected along the first direction X. The recesses 2122 are recessed from the first folded edge 212 toward the support plate 22. Each recess 2122 forms at least one first fixing hole 2121. 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 avoidance notch 2222 is defined between two adjacent first lugs 2221. The recesses 2122 are located within the avoidance notch 2222. The plurality of connecting portions 2123 correspond one-to-one with and are connected to the plurality of first lugs 2221.

[0158] As shown in Figures 5 and 6, the first folded edge 212 may include multiple recesses 2122 and multiple connecting portions 2123. The multiple recesses 2122 and multiple connecting portions 2123 are arranged alternately along the length direction of the first folded edge 212, and both ends of the first folded edge 212 along the length direction are connecting portions 2123. The recesses 2122 are recessed relative to the connecting portions 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 and connecting portions 2123 cooperate to define a recessed groove that opens toward the second folded edge 222, and the recessed groove extends through both sides of the first folded edge 212 along the width direction.

[0159] Meanwhile, a first fixing hole 2121 is formed on the recess 2122 and penetrates the recess 2122 along the thickness direction of the first folded edge 212. At least one first fixing hole 2121 can be formed on each recess 2122. For example, a portion of the multiple recesses 2122 can have one first fixing hole 2121 formed, and another portion of the multiple recesses 2122 can have two or three first fixing holes 2121 formed.

[0160] The second fold 222 has a plurality of first lugs 2221 arranged at intervals. The plurality of first lugs 2221 are formed as rectangular plates extending along the length and width directions of the second fold 222. The plurality of first lugs 2221 correspond one-to-one with the plurality of connecting portions 2123 and are located in the recessed groove defined by the corresponding first lug 2221. A clearance notch 2222 is defined between two adjacent first lugs 2221. The plurality of recesses 2122 correspond one-to-one with the plurality of clearance notches 2222 and extend into the corresponding clearance notches 2222.

[0161] When the first folded edge 212 is connected to the second folded edge 222, the first lug 2221 of the second folded edge 222 fits into the recessed groove at the location of the corresponding connecting part 2123 and is welded to the corresponding connecting part 2123. The recess 2122 corresponds one-to-one with the clearance notch 2222 and fits into the corresponding clearance notch 2222 so that the first fixing hole 2121 is exposed at the location of the clearance notch 2222, thereby facilitating the fasteners inserted in the first fixing hole 2121 to pass through the clearance notch 2222 and connect to the main box 200.

[0162] In the above technical solution, since multiple recesses 2122 are formed on the first folded edge 212, the multiple 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 main box 200. At the same time, the multiple recesses 2122 and the multiple connecting parts 2123 can cooperate to define multiple recessed grooves for accommodating the first lug 2221. Thus, 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. This allows the recess 2122 to abut against the connected parts when connected to the mounting beam 600, improving the reliability of the fastening connection.

[0163] In some embodiments of this application, the support plate 22 has a recessed relief groove 223 on the side edge of the support plate 22 facing away from the main board 21 in the third direction Z. The relief groove 223 is used to avoid the inlet portion 411 and the outlet portion 412.

[0164] As shown in Figure 6, the clearance groove 223 can be formed at the middle position of the support portion, and the width of the clearance groove 223 can gradually decrease in the direction from the support plate 22 to the main plate 21. This facilitates the processing and forming of the clearance groove 223 and reduces stress concentration.

[0165] In the above technical solution, by providing a clearance groove 223 on the support plate 22 to avoid the inlet 411 and outlet 412 of the heat exchange tube 410, the mutual interference between the support plate 22 and the inlet 411 and outlet 412 can be reduced, making the layout more compact and reasonable.

[0166] In some embodiments of this application, the plurality of plates further include: a reinforcing plate 30, which extends along a first direction X, 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.

[0167] The number of reinforcing plates 30 can be one or more. The reinforcing plates 30 can be flat plates connected between the first plate 10 and the second plate 20, or they can be bent plates. This application does not impose specific restrictions on this.

[0168] In the above technical solution, since a reinforcing plate 30 is provided 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.

[0169] In some embodiments of this application, 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, and the bent portion 32 is connected to the flat plate portion 31 and is formed into a U-shaped structure that extends along a first direction X and opens toward the first plate 10 in a second direction Y.

[0170] As shown in Figures 5 and 6, 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 or height direction of the first expansion beam 100. The surface of the flat plate portion 31 may be attached to the side surface of the first plate 10 facing the second plate 20. The bent portion 32 is connected between two adjacent flat plate portions 31. Specifically, the two ends of the bent portion 32 are respectively connected to the two flat plate portions 31, and the middle part of the bent portion 32 protrudes towards the second plate 20 and is welded to the second plate 20.

[0171] Furthermore, the bending portion 32 includes two side plates and a bottom plate. The bottom plate is a flat plate extending along the length and height directions of the first expansion beam 100, and the surface of the bottom plate is in contact with the surface of the second plate 20 facing the first plate 10. The two side plates are respectively connected to the two side edges in the width direction of the bottom plate and extend along the thickness direction of the first expansion beam 100 toward the first plate 10 to connect with the flat plate portion 31. The side plates and the bottom plate can be arranged perpendicularly, and the connection position between the side plates and the bottom plate can be connected by an arc to reduce stress concentration.

[0172] In the above technical solution, by making the reinforcing plate 30 include a flat plate portion 31 connected to the first plate 10 and a bent portion 32 that protrudes and bends toward the second plate 20, it is not only convenient to weld the reinforcing plate 30 to the first plate 10 and the second plate 20, but also to improve the structural strength of the reinforcing plate 30 and enhance the overall strength of the first expansion beam 100.

[0173] In some embodiments of this application, there are multiple bending portions 32, which are arranged at intervals along a first direction X. Flat plate portions 31 are connected between two adjacent bending portions 32 and on both sides of the multiple bending portions 32 in the first direction X.

[0174] In other words, the number of bending portions 32 can be two, three, four, or more. Thus, 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 respectively through multiple flat portions 31 and multiple bending portions 32. This improves 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.

[0175] For example, the reinforcing plate 30 may include three flat plate portions 31 and two bent portions 32, the two bent portions 32 being arranged vertically at intervals and connected between two adjacent flat plate portions 31.

[0176] Furthermore, multiple weight-reducing holes are formed on the bottom plate and / or side plate of the bending portion 32. These multiple weight-reducing holes are arranged at intervals along the length direction of the reinforcing plate 30. This reduces the amount of material used, lightens the weight of the reinforcing plate 30, lowers the weight of the first expansion beam 100, and increases the energy density of the battery device 1000.

[0177] In the above technical solution, by providing multiple bending 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 be improved, thereby reducing the weak areas of the first expansion beam 100.

[0178] In some embodiments of this application, the reinforcing plate 30 further 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.

[0179] As shown in Figure 6, the third folded edge 33 includes a folded edge body and a plurality of second lugs 331. The flat plate 31 closest to the support plate 22 among the plurality of flat plate parts 31 is the first flat plate part 31. The folded edge body is connected to the side edge of the first flat plate part 31 near the support plate 22, and the folded edge body is a long strip plate extending from one end to the other end along the length direction of the first expansion beam 100. The plurality of second lugs 331 are connected to the side edge of the folded edge body opposite to the first flat plate part 31, and extend into a rectangular plate shape along the thickness and length directions of the first expansion beam 100. An avoidance hole is defined between two adjacent second lugs 331 to avoid the recess 2122 on the first folded edge 212.

[0180] When welding the first expansion beam 100, the connecting part 2123 on the first fold 212, the second lug 331 on the third fold 33, and the first lug 2221 on the second fold 222 are stacked in sequence, and then the three layers are welded together.

[0181] In the above technical solution, 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 at the connection position of 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 main box 200. At the same time, the multiple spaced second lugs 331 can define the avoidance hole to avoid the recess 2122 of the first folded edge 212, and reduce the probability of interference between the third folded edge 33 and the fasteners passing through the first fixing hole 2121.

[0182] In some embodiments of this application, the battery device 1000 further includes: a first connecting plate 510 and a second connecting plate 520. The first connecting plate 510 is fixed to the side wall of the main casing 200 by fasteners. The first plate 510 has first connecting holes 13 at both ends in the first direction X, which penetrate the first plate 510 in the second direction Y. The first plate 510 is fastened to the first connecting plate 510 by fasteners passing through the first connecting holes 13. The second connecting plate 520 is fixed to the side wall of the main casing 200 by fasteners. The second plate 20 has second connecting holes 213 at both ends in the first direction X, which penetrate the second plate 20 in the second direction Y. The second plate 20 is fastened to the second connecting plate 520 by fasteners passing through the second connecting holes 213.

[0183] As shown in Figures 7 and 8, the first connecting plate 510 is provided with a first hole and a second hole that pass through the first connecting plate 510 along the thickness direction. One end of the first connecting plate 510 is fixed to the side wall of the main box 200 by fasteners passing through the first hole and the first fastening hole on the side wall of the main box 200. At the same time, the other end of the first connecting plate 510 is 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, the two ends of the first expansion beam 100 in the length direction are fixedly connected to the main box 200 through the first connecting plate 510.

[0184] The second connecting plate 520 is provided with a third hole and a fourth hole that penetrate the second connecting plate 520 along the thickness direction. One end of the second connecting plate 520 is fixed to the side wall of the main box 200 by fasteners passing through the third hole and the second fastening hole on the side wall of the main box 200. At the same time, the other end of the second connecting plate 520 is 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 of the first expansion beam 100 in the length direction are fixedly connected to the main box 200 through the second connecting plate 520.

[0185] There are two first connecting plates 510, which fix the two ends of the first plate 10 in the length direction to the two opposite inner side walls of the main box 200 in the first direction X. There are two second connecting plates 520, which fix the two ends of the second plate 20 in the length direction to the two opposite inner side walls of the main box 200 in the first direction X.

[0186] Thus, the first expansion beam 100 is fixed to the inner wall of the main box 200 on both sides in the thickness direction by the first connecting plate 510 and the second connecting plate 520, which not only facilitates the tight connection between the first expansion beam 100 and the main box 200, but also improves the reliability of the connection between the first expansion beam 100 and the main box 200.

[0187] Furthermore, both the first connecting plate 510 and the second connecting plate 520 are connected to the first expansion beam 100 via rivet nuts. The first expansion beam 100 includes a reinforcing plate 30, the flat portion 31 of which has a perforated hole. This perforated hole is directly opposite to the first connecting hole 13 on the first plate 10 in the thickness direction of the first expansion beam 100. This reduces interference between the reinforcing plate 30 and the rivet nuts passing through the first connecting holes 13, while ensuring the reinforcing plate 30 extends to the end edges of both ends in the length direction of the first plate 10.

[0188] In one example, the first connecting plate 510 includes two sub-plate portions arranged in an L-shape, which respectively abut the surface of the first plate 10 and the inner wall surface of the main box 200. Furthermore, the two sub-plate portions are connected by an arc. Furthermore, a first rib is formed at the connection position of the two sub-plate portions.

[0189] In one example, the second connecting plate 520 includes a first segment, a second segment, and an inclined segment connecting the first and second segments. The first segment is a plate and fits against the side wall of the main housing 200, and a third hole is formed on the first segment. The second segment is plate-shaped and fits against the surface of the second plate 20, and a fourth hole is formed on the second segment. The inclined segment is a plate that is inclined relative to both the first and second segments, and both ends of the inclined segment are connected to the first and second segments by arcs, respectively.

[0190] Furthermore, a second rib is formed on the second connecting plate 520, extending from one end of the second connecting plate 520 in the first direction X to the other end, to improve the structural strength of the second connecting plate 520. There are multiple third holes, each arranged on both sides of the second rib in the third direction Z. There are also multiple fourth holes, each arranged on both sides of the second rib.

[0191] In the above technical solution, since the battery device 1000 also includes a first connecting plate 510 and a second connecting plate 520, and the first expansion beam 100 is fixed to the inner wall of the main box 200 on both sides in the thickness direction through the first connecting plate 510 and the second connecting plate 520 respectively, it can not only facilitate the tight connection between the first expansion beam 100 and the main box 200, but also improve the connection reliability between the first expansion beam 100 and the main box 200.

[0192] In some embodiments of this application, the mounting beam 600 extends along a first direction and is arranged on the side of the first expansion beam 100 away from the battery cell 300 in a second direction, and the first expansion beam 100 and the mounting beam 600 are connected by fasteners and / or bonded together by an adhesive layer 800, and the first direction intersects the second direction.

[0193] As shown in Figures 9 and 10, both the mounting beam 600 and the first expansion beam 100 extend along the first direction. The mounting beam 600 is arranged on the side of the first expansion beam 100 away from the battery cell 300. In other words, the first expansion beam 100 is arranged on the side of the mounting beam 600 facing the battery cell 300.

[0194] In one example, at least a portion of the surface of the first expansion beam 100 has an electrophoretic coating. Specifically, the first expansion beam 100 can be an integral part independent of the main housing 200. After the first expansion beam 100 is formed, it can be placed in an electrophoretic pool for electrophoresis to form an electrophoretic coating on the surface of the first expansion beam 100. The electrophoretic coating can reduce the probability of corrosion of the first expansion beam 100 during long-term use of the battery device 1000 and improve the service life of the first expansion beam 100.

[0195] The first expansion beam 100 and the mounting beam 600 can be connected by fasteners alone, or by adhesive layer 800 alone, or by both fasteners and adhesive layer 800 simultaneously.

[0196] The first expansion beam 100 can be directly bonded to the mounting beam 600 via an adhesive layer 800, which can be a structural adhesive. Similarly, the first expansion beam 100 can be directly connected to the mounting beam 600 via fasteners, or indirectly fastened to the mounting beam 600 via fasteners. The fasteners connecting the first expansion beam 100 and the mounting beam 600 include, but are not limited to, bolts, studs, and rivet nuts.

[0197] During the assembly of the battery device 1000, the main box 200, the first expansion beam 100 and / or the mounting beam 600 can be surface treated (e.g., insulating spraying and electrophoresis) first. Then, the thermal management component 400 is fixed to the bottom wall 202 of the main box 200. Next, the mounting beam 600 is fixed to the bottom wall 202 of the main box 200 with fasteners. Finally, the first expansion beam 100 is fixed to the mounting beam 600 with fasteners and adhesive layer 800, and the two ends of the first expansion beam 100 are fixed to the side wall of the main box 200 by the first connecting plate 510 and the second connecting plate 520.

[0198] In this way, not only can the heat exchange tube 410 of the thermal management component 400 be embedded between the main box 200 and the first expansion beam 100, but it is also convenient to perform surface treatment on the main box 200, the mounting beam 600 and the first expansion beam 100 respectively before the battery device is assembled, thereby improving the corrosion resistance and insulation performance of the main box 200, the first expansion beam 100 and the mounting beam 600.

[0199] Furthermore, after electrophoresis, the first expansion beam 100 does not need to be welded to the main housing 200 and the mounting beam 600. Instead, it is directly bonded to the mounting beam 600 and connected to the main housing 200 via fasteners. This ensures that the connection between the first expansion beam 100 and the mounting beam 600 is unaffected by the electrophoretic coating. The dual connection between the mounting beam 600 and the first expansion beam 100 via fasteners and the adhesive layer 800 further improves the reliability and stability of the connection, reducing the probability of fasteners loosening or failing due to long-term stress on the first expansion beam 100. This achieves a reliable connection between the first expansion beam 100 and the mounting beam 600 after surface treatment. Additionally, it facilitates assembly between the first expansion beam 100 and the mounting beam 600, improving assembly efficiency.

[0200] In the above technical solution, since the first expansion beam 100 and the mounting beam 600 are connected by fasteners and / or bonded by adhesive layer 800, it not only facilitates the assembly between the first expansion beam 100 and the mounting beam 600 and improves assembly efficiency, but also allows the first expansion beam 100 and the mounting beam 600 to undergo their respective required surface pretreatments to improve their corrosion resistance and insulation performance. This improves the flexibility of surface treatment, saves processing costs, and increases production efficiency. In addition, the fixed connection between the first expansion beam 100 and the mounting beam 600 by fasteners and adhesive layer 800 further improves the reliability and stability of the connection between the first expansion beam 100 and the mounting beam 600.

[0201] In some embodiments of this application, the first expansion beam 100 has a first flange 212 extending toward the mounting beam 600, the first flange 212 being supported on the top of the mounting beam 600, and the first flange 212 being connected to the mounting beam 600 by fasteners.

[0202] As shown in Figure 5, the first expansion beam 100 includes a first plate 10, a second plate 20, and a reinforcing plate 30. The second plate 20 includes a support plate 22 and a main plate 21. The lower edge of the main plate 21 has a first folded edge 212, the upper edge of the support plate 22 has a second folded edge 222, and the lower edge of the reinforcing plate 30 has a third folded edge 33. The first folded edge 212, the third folded edge 33, and the second folded edge 222 are stacked and welded together from top to bottom, forming the support edge of the first expansion beam 100. When assembling the battery device 1000, the support edge is supported on the top of the mounting beam 600 and fixedly connected to the top of the mounting beam 600 by multiple fasteners. This facilitates the fixed connection between the first expansion beam 100 and the mounting beam 600, improving assembly efficiency.

[0203] In the above technical solution, since the mounting beam 600 is arranged on one side of the thickness direction of the first expansion beam 100, and the first expansion beam 100 is fastened to the top of the mounting beam 600 through the first folded edge 212, the first folded edge 212 can play a positioning role, which makes it convenient to fix the first expansion beam 100 on the mounting beam 600 and improves the assembly efficiency.

[0204] In some embodiments of this application, as shown in Figures 9 and 10, the mounting beam 600 includes two first beams 610, both of which extend along a first direction X and are spaced apart in the first direction X. The two first beams 610 are fixed to the bottom wall 202 of the main box 200, and an avoidance channel 203 is formed between the two first beams 610.

[0205] In the above technical solution, since the mounting beam 600 includes two first beams 610 arranged at intervals, and the clearance channel 203 is formed between the two first beams 610, the clearance channel 203 can be easily formed, which facilitates the inlet 411 and outlet 412 of the heat exchange tube 410 to pass through the mounting beam 600 and connect with the collector 420, simplifying the structure, reducing the forming difficulty of the clearance channel 203, and reducing the processing difficulty of the mounting beam 600.

[0206] In some embodiments of this application, the first beam 610 includes a beam body 611, a first supporting edge 612, and a second supporting edge 613. The beam body 611 extends along a first direction X and has a U-shaped cross-section. The first supporting edge 612 and the second supporting edge 613 are respectively connected to the two sides of the opening of the beam body 611 and extend away from each other. The first supporting edge 612 and the second supporting edge 613 are both connected to the bottom wall 202 of the main box 200. The first supporting edge 612 is located on the side of the beam body 611 facing the first expansion beam 100. The bottom surface of the first expansion beam 100 in the third direction Z is supported on the first supporting edge 612.

[0207] For example, as shown in Figures 9-11, the cross-section of the first beam 610 is U-shaped, and the opening of the first beam 610 faces the bottom wall 202 of the main box 200. The U-shaped beam 611 can enhance the structural strength of the first beam 610 and reduce its weight. The first support edge 612 and the second support edge 613 are respectively provided on both sides of the beam 611, which not only increases the contact area between the first beam 610 and the bottom wall 202 of the main box 200 and increases the support stability between the first beam 610 and the bottom wall 202 of the main box 200, but also facilitates the fastening connection of the first beam 610 to the bottom wall 202 of the main box 200 through the first support edge 612 and / or the second support edge 613.

[0208] In the above technical solution, by making the first beam 610 include a U-shaped beam body 611 and a first support edge 612 and a second support edge 613 connected to the two sides of the opening of the beam body 611, the structural strength of the first beam 610 can be improved, and the support stability between the first beam 610 and the bottom wall 202 of the main box 200 can be increased, making it easier for the first beam 610 to be fastened to the main box 200 through the first support edge 612 and / or the second support edge 613.

[0209] In some embodiments of this application, the first support edge 612 is bonded to the bottom surface of the first expansion beam 100 by an adhesive layer, and / or the side of the beam body 611 facing the first support edge 612 in the second direction Y is bonded to the first expansion beam 100 by an adhesive layer 800.

[0210] In other words, an adhesive layer 800 can be provided only on the surface of the first support edge 612 facing the first expansion beam 100 in the third direction Z for bonding with the first expansion beam 100. Alternatively, an adhesive layer 800 can be provided only on the side of the beam body 611 facing the first support edge 612 in the second direction Y for bonding with the first expansion beam 100. Or, an adhesive layer 800 can be provided on both the surface of the first support edge 612 facing the first expansion beam 100 in the third direction Z and the side of the beam body 611 facing the first support edge 612 in the second direction Y for bonding with the first expansion beam 100.

[0211] In the above technical solution, by providing an adhesive layer 800 on the surface of the first support edge 612 and / or the side of the beam 611, an adhesive connection can be achieved between the first expansion beam 100 and the first beam 610 of the mounting beam 600, thereby achieving an adhesive connection between the first expansion beam 100 and the mounting beam 600, further improving the connection reliability between the first expansion beam 100 and the mounting beam 600, reducing assembly difficulty, and improving assembly efficiency.

[0212] In some embodiments of this application, the mounting beam 600 further includes a connecting beam 620, which extends along a first direction X and connects between two first beams 610. The connecting beam 620 is spaced apart from the inner wall of the receiving cavity 201. The connecting beam 620, the two first beams 610 and the bottom wall 202 of the main box 200 enclose an avoidance passage 203.

[0213] For example, as shown in Figures 9-11, the connecting beam 620 can be a U-shaped beam with an opening facing the bottom wall 202 of the main box 200. Both ends of the connecting beam 620 can be lapped and connected to the two first beams 610 respectively. Specifically, the end of the first beam 610 facing the connecting beam 620 is the lapped end. The dimensions of the beam body 611 at the lapped end in both the second direction Y and the third direction Z are smaller than the dimensions of the remaining beam body 611 of the first beam 610. Both ends of the connecting beam 620 are covered on the lapped end, and the connecting beam 620 and the beam body 611 at the lapped end can be connected by fasteners. The side wall of the beam body 611 at the lapped end has a first through hole, and the side wall of the connecting beam 620 has a second through hole. Fasteners can pass through the first and second through holes to achieve a tight connection between the connecting beam 620 and the lapped end.

[0214] Among them, the end edge of the connecting beam 620 facing the bottom wall 202 of the main box 200 is spaced apart from the bottom wall 202 of the main box 200. For example, the distance between the connecting beam 620 and the bottom wall 202 of the main box 200 can be greater than or equal to 8mm. In this way, a clearance channel 203 of sufficient height can be formed between the connecting beam 620 and the bottom wall 202 of the main box 200, so that the inlet 411 and outlet 412 of the heat exchange tube 410 can be inserted into the clearance channel 203.

[0215] In the above technical solution, since the mounting beam 600 also includes a connecting beam 620, which connects the two mounting beams 600, the mounting beam 600 can be a continuous beam structure in the first direction X, and can continuously support the first expansion beam 100 in the first direction X. This can improve the support stability of the mounting beam 600 on the first expansion beam 100. In addition, it can also conveniently define the avoidance passage 203.

[0216] In some embodiments of this application, the mounting beam 600 further includes a bracket 630, which is fixed to the inner wall of the receiving cavity 201 and arranged between the two first beams 610, with the connecting beam 620 supported on the bracket 630.

[0217] The number of supports 630 can be one or more. For example, one, two, three, five, or seven or more supports 630 can be arranged between two first beams 610. Thus, the number of supports 630 can be set according to the actual support requirements, as long as they do not obstruct the inlet 411 and outlet 412 of the heat exchange tube 410 from passing through the mounting beam 600.

[0218] In the above technical solution, by setting a bracket 630 between the two first beams 610 to support the connecting beam 620, the support effect of the connecting beam 620 can be improved, the structural strength of the connecting beam 620 can be enhanced, and the structural strength of the first expansion beam 100 can be enhanced.

[0219] In some embodiments of this application, the bracket 630 includes a support plate 631 and a plurality of support legs 632. The plurality of support legs 632 are arranged circumferentially along the support plate 631. Each support leg 632 includes a support section 6321 and an extension section 6322 arranged in an L-shape. The support section 6321 is connected to the bottom wall 202 of the main box 200. The extension section 6322 extends away from the support section 6321 in a third direction Z. The support plate 631 is connected to one end of the extension section 6322 of the plurality of support legs 632 that is away from the support section 6321. The connecting beam 620 is supported on the support plate 631 and fixed to the support plate 631 by fasteners.

[0220] For example, the number of outriggers 632 can be two, three, four, five or more. By setting multiple outriggers 632, the structural strength of the support 630 can be improved, and the uniformity of force distribution on the support plate 631 in the circumferential direction can be enhanced.

[0221] Furthermore, the bracket 630 is a one-piece molded component, and the support plate 631 and the support leg 632 can be connected by an arc, as can the support section 6321 and the extension section 6322. This reduces stress concentration on the bracket 630.

[0222] For example, as shown in Figures 10 and 11, the bracket 630 includes a support plate 631 and four legs 632. Two of the four legs 632 are symmetrically arranged about a first direction X, and the other two legs 632 are symmetrically arranged about a second direction Y. The support plate 631 is arranged between the four legs 632 and connected to the extensions 6322 of the four legs 632. The support section 6321 is connected to the end of the extension 6322 facing away from the support plate 631 in the third direction Z, and is also located on the side of the extension 6322 facing away from the support plate 631 in the thickness direction. Therefore, the bracket 630 can be easily supported on the bottom wall 202 of the main housing 200, reducing interference between the support sections 6321 of the multiple legs 632.

[0223] Furthermore, a third through hole can be formed on the support plate 631 in the vertical direction. The connecting beam 620 can be covered on the upper side of the bracket 630 and supported on the support plate 631. It can then be fixedly connected to the support plate 631 by fasteners passing through the third through hole.

[0224] In the above technical solution, since the bracket 630 includes a support plate 631 and multiple legs 632 supporting the support plate 631, the structure of the bracket 630 can be simplified, the support stability of the bracket 630 on the connecting beam 620 can be improved, and the connecting beam 620 can be conveniently fixedly connected to the bracket 630.

[0225] In some embodiments of this application, the battery device 1000 may further include: a second expansion beam 700, which extends along a first direction X and is spaced apart from the first expansion beam 100 in a second direction Y, and a battery cell 300 is disposed between the first expansion beam 100 and the second expansion beam 700, wherein the structure of the second expansion beam 700 is the same as or different from the structure of the first expansion beam 100.

[0226] The battery device 1000 includes multiple rows of battery cells 300 arranged sequentially along a first direction X. Each row of battery cells 300 includes multiple battery cells 300 arranged in a second direction Y. A first expansion beam 100 and a second expansion beam 700 are respectively arranged on both sides of the multiple battery cells 300 in the second direction Y to limit the expansion of the multiple battery cells 300 in the second direction Y.

[0227] Furthermore, the top of the first expansion beam 100 may be provided with a first fixing point, and the top of the second expansion beam 700 may be provided with a second fixing point. 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.

[0228] There can be multiple first fixed points, multiple second fixed points, and multiple pull rods, with each of the multiple first fixed points, multiple second fixed points, and multiple pull rods corresponding to one another.

[0229] In a specific example, the second expansion beam 700 may include a first plate 10, a second plate 20 and a reinforcing plate 30, with the reinforcing plate 30 disposed between the first plate 10 and the second plate 20. The first plate 10, the second plate 20 and the reinforcing plate 30 may all be integrally formed independent components, and the first plate 10, the second plate 20 and the reinforcing plate 30 may be welded together.

[0230] In the above technical solution, since the battery device 1000 also includes a second expansion beam 700, the second expansion beam 700 can cooperate with the first expansion beam 100 to jointly suppress the expansion of the battery cell 300 in the second direction Y.

[0231] In some embodiments of this application, the thermal management component 400 includes a heat exchange tube 410, and a mounting groove 204 is formed on the bottom wall 202 of the main housing 200. The heat exchange tube 410 is disposed in the mounting groove 204 and extends along the extension direction of the mounting groove 204.

[0232] The mounting groove 204 can extend along the extension direction of the heat exchange tube 410. The heat exchange tube 410 is located in the mounting groove 204, and the upper surface of the heat exchange tube 410 can be flush with the bottom wall 202 of the main box 200 or extend upward beyond the bottom wall 202 of the main box 200 to facilitate contact with the bottom surface of the battery cell 300.

[0233] Furthermore, an adhesive layer may be provided on the inner wall of the mounting groove 204, and the heat exchange tube 410 can be bonded to the inner wall of the mounting groove 204 through the adhesive layer.

[0234] The heat exchanger tubes 410 of the heat management component 400 can be multiple, and these multiple heat exchanger tubes 410 can be arranged at intervals. For example, there can be two heat exchanger tubes 410, which are symmetrically arranged in the first direction X. Each heat exchanger tube 410 includes a first heat exchange section and a second heat exchange section. The first heat exchange section is bent into a U-shape, and the openings of the first heat exchange sections of the two heat exchanger tubes 410 are arranged facing each other. The second heat exchange section is arranged inside the first heat exchange section and connected to it. The second heat exchange section includes multiple straight tube sections extending along the second direction Y. These multiple straight tube sections are arranged at intervals along the first direction X and connected sequentially. Adjacent straight tube sections are connected by bends. The shape of the mounting groove is adapted to the bending shape of the heat exchanger tubes 410.

[0235] In the above technical solution, since an installation groove 204 is formed on the bottom wall 202 of the main box 200 and the heat exchange tube 410 is placed in the installation groove 204, the heat exchange tube 410 can be conveniently arranged, the space occupied by the heat exchange tube 410 in the receiving cavity 201 can be reduced, the structure is compact, and the energy density of the battery device 1000 is improved.

[0236] Secondly, embodiments of this application also provide an electrical device 1A, including the battery device 1000 of any of the above embodiments.

[0237] In the above technical solution, since the power-consuming device 1A is equipped with the aforementioned battery device 1000, on the one hand, the battery device 1000 is provided with a mounting beam 600, and the first expansion beam 100 is mounted on the main housing 200 through the mounting beam 600. The inlet 411 and outlet 412 of the thermal management component 400 pass through the avoidance channel 203 formed by the mounting beam 600. This allows the thermal management component 400 to be installed preferentially before the first expansion beam 100, which can reduce the mutual influence between the installation of the first expansion beam 100 and the installation of the thermal management component 400, and improve the installation efficiency. On the other hand, since the first expansion beam 100 and the mounting beam 600 are detachably connected, the first expansion beam 100 and the mounting beam 600 can be subjected to their respective required surface treatments. For example, the first expansion beam 100 can be subjected to anti-corrosion treatment, and the mounting beam 600 can be subjected to insulation treatment, which can improve the flexibility of surface treatment, save processing costs, and improve production efficiency.

[0238] A battery device 1000 according to a specific embodiment of the present application will now be described with reference to Figures 2-11.

[0239] As shown in Figures 2, 3 and 4, the battery device 1000 includes multiple battery cells 300, a main housing 200, a thermal management component 400, a first expansion beam 100, a second expansion beam 700, a first connecting plate 510, a second connecting plate 520, a mounting beam 600 and two tie rods, with the multiple battery cells 300 located inside the main housing 200.

[0240] Specifically, the main box 200 defines a rectangular cavity 201 with an open top. The first expansion beam 100 and the second expansion beam 700 are both disposed in the cavity 201. The first expansion beam 100 and the second expansion beam 700 extend along the width direction of the main box 200 and are arranged at intervals along the length direction of the main box 200. Multiple battery cells 300 are disposed between the first expansion beam 100 and the second expansion beam 700.

[0241] As shown in Figures 5 and 6, 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 that is vertically arranged and extends to the left and right. The upper edge of the first plate 10 is provided with a first flange 11 and the lower edge is provided with a second flange 12. The left and right ends of the first plate 10 are respectively provided with a first connecting hole 13 that passes through the first plate 10 in the front-back direction.

[0242] The second plate 20 includes a main plate 21 and a support plate 22. The main plate 21 is arranged on the upper side of the support plate 22. The main plate 21 is a plate that is vertically arranged and extends to the left and right. The upper edge of the main plate 21 is provided with a third flange 211 and the lower edge is provided with a first folded edge 212. The left and right ends of the main plate 21 are respectively formed with second connecting holes 213 that run through the main plate 21 from front to back. The first folded edge 212 includes connecting portions 2123 and recesses 2122 that are alternately arranged in the left and right direction. The left and right ends of the recesses 2122 are respectively connected to the connecting portions 2123 and the middle is recessed downward. Each recess 2122 is formed with a first fixing hole 2121 that runs through the top and bottom. Two adjacent recesses 2122 cooperate with the connecting portions 2123 to define a recessed groove.

[0243] The support plate 22 is a vertically oriented plate that extends horizontally. The upper edge of the support plate 22 has a third folded edge 33, and the lower edge has a fourth flange 221. The third folded edge 33 has a plurality of first lugs 2221 spaced apart in the left-right direction, with a clearance notch 2222 defined between adjacent first lugs 2221. The lower edge of the support plate 22 has an upwardly recessed clearance groove 223 located at the center of the support plate 22 in the left-right direction.

[0244] The reinforcing plate 30 includes three flat plate portions 31, two bent portions 32, and a third folded edge 33. The flat plate portions 31 are flat plates extending horizontally and vertically. The bent portions 32 are connected between two adjacent flat plate portions 31, and the cross-section of the bent portions 32 is U-shaped, opening towards the first plate 10. The third folded edge 33 is horizontally arranged and connected to the lower edge of the lowest flat plate portion 31. The third folded edge 33 has a plurality of second lugs 331 arranged at intervals from left to right. The plurality of second lugs 331, the plurality of first lugs 2221, and the plurality of connecting portions 2123 correspond one-to-one, and each second lug 331 is sandwiched between the corresponding connecting portion 2123 and the first lug 2221.

[0245] Furthermore, the main board 21 has multiple welding holes, which are elongated holes extending in the left-right direction. The multiple welding holes correspond to the bending portion 32 of the reinforcing plate 30, and the main board 21 can be welded to the bending portion 32 of the reinforcing plate 30 at the multiple welding hole positions.

[0246] There are two first connecting plates 510, located at opposite ends of the first plate 10 in the left-right direction. One end of each first connecting plate 510 is connected to the first plate 10 via fasteners, and the other end is also connected to the side wall of the main casing 200 in the left-right direction via fasteners. There are also two second connecting plates 520, located at opposite ends of the main board 21 in the left-right direction. One end of each second connecting plate 520 is fixedly connected to the second plate 20 via fasteners, and the other end is also connected to the side wall of the main casing 200 in the left-right direction via fasteners.

[0247] The mounting beam 600 includes two first beams 610, a connecting beam 620, and a bracket 630. The two first beams 610 are arranged at intervals on the left and right. The cross-section of the first beam 610 is "U" shaped and fixed to the bottom wall 202 of the main box 200. The bracket 630 is a four-claw bracket 630, which is arranged between the two first beams 610. The two ends of the connecting beam 620 overlap with the two first beams 610, and the middle part of the connecting beam 620 is supported on the bracket 630.

[0248] The assembly process of the battery device 1000 in this embodiment is described below.

[0249] Step 1: Assemble the first expansion beam 100. Specifically, the first plate 10, main plate 21, support plate 22, and reinforcing plate 30 are welded together to form the first expansion beam 100. Then, the first expansion beam 100 is pre-electrophoretically coated to form an electrophoretic coating on its surface. When welding the first expansion beam 100, the first flange 11 is lap-welded to the third flange 211, the second flange 12 is lap-welded to the fourth flange 221, the first folded edge 212, the second folded edge 222, and the third folded edge 33 are welded together, the first plate 10 is spot-welded to the flat portion 31 of the reinforcing plate 30, and the main plate 21 is welded to the bent portion 32 of the reinforcing plate 30.

[0250] Step two: Assemble the main housing 200, cold plate, and mounting beam 600. Specifically, weld the two first beams 610 and the bracket 630 of the mounting beam 600 to the main housing 200. Then, perform electrophoresis on the main housing 200 (with the first beams 610 and bracket 630 already welded on), applying an insulating spray to the portion of the bottom wall 202 of the main housing 200 corresponding to the battery cell 300. Next, attach the thermal management component 400 to the bottom wall 202 of the main housing 200. Finally, fix the connecting beam 620 of the mounting beam 600 to the two first beams 610 and the bracket 630 using fasteners.

[0251] Step 3: Fix the first expansion beam 100 to the main box 200. Specifically, support the first expansion beam 100 from Step 1 onto the mounting beam 600, so that the side wall of the beam body 611 of the first beam 610 and the upper surface of the first support edge 612 are bonded to the first expansion beam 100, and then rivet the first expansion beam 100 to the mounting beam 600. Then, fasten the two ends of the first connecting plate 510 to the first plate 10 of the first expansion beam 100 and the left and right side walls of the main box 200 respectively, and fasten the second connecting plate 520 to the second plate 20 of the first expansion beam 100 and the left and right side walls of the main box 200 respectively.

[0252] According to the battery device 1000 of this embodiment, the first expansion beam 100 is an independent integral part. The first expansion beam 100, the mounting beam 600 and the main box 200 can be pre-treated (electrophoresis and insulating spraying) before being reliably connected to the main box 200 through fasteners and adhesive layer 800.

[0253] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Main housing (200), the main housing (200) defining a receiving cavity (201); A battery cell (300) is disposed in the receiving cavity (201); The mounting beam (600) is installed on the bottom wall (202) of the main box (200) and together with the bottom wall (202) forms a clearance passage (203); The first expansion beam (100) is detachably mounted on the mounting beam (600) and cooperates with the battery cell (300); A thermal management component (400) is disposed in the receiving cavity (201) and heat-exchanges with the battery cell (300). The thermal management component (400) has an inlet (411) and an outlet (412), at least one of the inlet (411) and the outlet (412) passing through the clearance channel (203).

2. The battery device according to claim 1, characterized in that, The first expansion beam (100) includes multiple plates, all of which are sheet metal parts, and the multiple plates are welded together to form the first expansion beam (100).

3. The battery device according to claim 2, characterized in that, The plurality of plates include: a first plate (10) and a second plate (20), the first plate (10) and the second plate (20) extending along a first direction (X) and arranged in a second direction (Y), and in a third direction (Z), the two ends of the first plate (10) are respectively connected to the two ends of the second plate (20) and cooperate to define the cavity of the first expansion beam (100), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other.

4. The battery device according to claim 3, characterized in that, In the third direction (Z), the first plate (10) has a first flange (11) and a second flange (12) extending toward the second plate (20) at both ends, and the second plate (20) has a third flange (211) and a fourth flange (221) extending toward the first plate (10) at both ends, the first flange (11) and the third flange (211) are connected together, and the second flange (12) and the fourth flange (221) are connected together.

5. The battery device according to claim 3 or 4, characterized in that, The second plate (20) includes a main plate (21) and a support plate (22) that are separately arranged. The main plate (21) is arranged on the side of the support plate (22) facing away from the bottom wall (202) in the third direction (Z). The main plate (21) has a first folded edge (212) extending away from the second plate (20) in the second direction (Y). The support plate (22) has a second folded edge (222) extending away from the second plate (20) in the second direction (Y). The first folded edge (212) and the second folded edge (222) are stacked and connected.

6. The battery device according to claim 5, characterized in that, The first flange (212) is formed with a plurality of first fixing holes (2121) that pass through the first flange (212) along the third direction (Z). 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 the first fixing holes (2121).

7. The battery device according to claim 6, characterized in that, The first folded edge (212) includes a plurality of connecting portions (2123) and a plurality of recesses (2122). The plurality of recesses (2122) and the plurality of connecting portions (2123) are alternately arranged and connected along the first direction. The recesses (2122) are recessed into the support plate (22) from the first folded edge (212). Each recess (2122) has at least one first fixing hole (2121). 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) being spaced apart along the first direction (X), and an avoidance notch (2222) defining a spacer between two adjacent first lugs (2221). The recess (2122) is located within the clearance notch (2222), and the plurality of connecting portions (2123) correspond one-to-one with and are connected to the plurality of first lugs (2221).

8. The battery device according to any one of claims 5-7, characterized in that, The support plate (22) has a recessed relief groove (223) on the side edge of the third direction (Z) away from the main board (21), which is recessed toward the main board (21). The relief groove (223) is used to avoid the inlet (411) and the outlet (412).

9. The battery device according to any one of claims 5-8, characterized in that, The plurality of plates further include a reinforcing plate (30) extending along the first direction (X), the reinforcing plate (30) being disposed between the first plate (10) and the second plate (20) and connected to the first plate (10) and the second plate (20).

10. The battery device according to claim 9, characterized in that, 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 as a U-shaped structure extending along the first direction (X) and opening toward the first plate (10) in the second direction (Y).

11. The battery device according to claim 10, characterized in that, The number of the bending portions (32) is multiple, and the multiple bending portions (32) are arranged at intervals along the first direction (X). The flat plate portion (31) is connected between two adjacent bending portions (32) and on both sides of the multiple bending portions (32) in the first direction (X).

12. The battery device according to any one of claims 10-11, characterized in that, The reinforcing plate (30) further 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).

13. The battery device according to any one of claims 3-12, characterized in that, Also includes: The first connecting plate (510) is fixed to the side wall of the main box (200) by fasteners. The first plate (10) has first connecting holes (13) at both ends in the first direction (X) that pass through the first plate (10) in the second direction (Y). The first plate (10) is fastened to the first connecting plate (510) by fasteners passing through the first connecting holes (13). The second connecting plate (520) is fixed to the side wall of the main box (200) by fasteners. The second plate (20) has second connecting holes (213) at both ends in the first direction (X) that pass through the second direction (Y). The second plate (20) is fastened to the second connecting plate (520) by fasteners passing through the second connecting holes (213).

14. The battery device according to any one of claims 1-13, characterized in that, The mounting beam (600) extends along a first direction and is arranged on the side of the first expansion beam (100) facing away from the battery cell (300) in a second direction. The first expansion beam and the mounting beam are connected by fasteners and / or bonded together by an adhesive layer (800). The first direction intersects the second direction.

15. The battery device according to claim 14, characterized in that, The first expansion beam (100) has a first flange (212) extending toward the mounting beam (600), the first flange (212) being supported on the top of the mounting beam (600), and the first flange (212) being connected to the mounting beam (600) by fasteners.

16. The battery device according to claim 15, characterized in that, The mounting beam (600) includes two first beams (610), both of which extend along a first direction and are spaced apart in the first direction (X). Both first beams (610) are fixed to the bottom wall (202), and the clearance channel is formed between the two first beams (610).

17. The battery device according to claim 16, characterized in that, The first beam (610) includes a beam body (611), a first supporting edge (612), and a second supporting edge (613). The beam body (611) extends along a first direction (X) and has a U-shaped cross-section. The first supporting edge (612) and the second supporting edge (613) are respectively connected to the two sides of the opening of the beam body (611) and extend away from each other. Both the first supporting edge (612) and the second supporting edge (613) are connected to the bottom wall (202). The first support edge (612) is located on the side of the beam (611) facing the first expansion beam (100), and the bottom surface of the first expansion beam (100) in the third direction (Z) is supported on the first support edge (612).

18. The battery device according to claim 17, characterized in that, The first support edge (612) is bonded to the bottom surface of the first expansion beam through the adhesive layer (800), and / or, the beam body (611) is bonded to the first expansion beam (100) in the second direction (Y) on the side facing the first support edge (612) through the adhesive layer (800).

19. The battery device according to any one of claims 16-18, characterized in that, The mounting beam (600) further includes a connecting beam (620) that extends along the first direction (X) and connects between the two first beams (610). The connecting beam (620) is spaced apart from the inner wall of the receiving cavity. The connecting beam (620), the two first beams (610), and the bottom wall (202) enclose the clearance passage.

20. The battery device according to claim 19, characterized in that, The mounting beam (600) further includes a bracket (630), which is fixed to the bottom wall (202) and arranged between the two first beams (610), and the connecting beam (620) is supported on the bracket (630).

21. The battery device according to claim 20, characterized in that, The bracket (630) includes a support plate (631) and a plurality of legs (632), the plurality of legs (632) being arranged circumferentially along the support plate (631), each leg (632) including an L-shaped support section (6321) and an extension section (6322), the support section (6321) being connected to the bottom wall (202), the extension section (6322) extending away from the support section (6321) in a third direction (Z), the support plate (631) being connected to the end of the extension section (6322) of the plurality of legs (632) away from the support section (6321), and the connecting beam (620) being supported on the support plate (631) and fixed to the support plate (631) by fasteners.

22. The battery device according to any one of claims 1-21, characterized in that, Also includes: The second expansion beam (700) extends along a first direction (X) and is spaced apart from the first expansion beam (100) in a second direction (Y). The battery cell (300) is arranged between the first expansion beam and the second expansion beam. The structure of the second expansion beam (700) is the same as or different from that of the first expansion beam (100).

23. The battery device according to any one of claims 1-22, characterized in that, The thermal management component (400) includes a heat exchange tube (410), and an installation groove (204) is formed on the bottom wall (202). The heat exchange tube (410) is disposed in the installation groove (204) and extends along the extension direction of the installation groove (204).

24. An electrical appliance, characterized in that, The battery device (1000) includes any one of claims 1-23.

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