Battery device and electric vehicle

Abstract

The invention discloses a battery device and an electric vehicle, and relates to the technical field of batteries, the battery device comprises a box body and a mounting beam, the box body comprises a box main body and a box cover, the box cover is arranged on one side of the box main body along a first direction, the box cover and the box main body jointly define a mounting cavity, and a battery monomer is arranged in the mounting cavity; the mounting beam comprises a beam body and a mounting part, the beam body is arranged on the side, away from the box body in the first direction, of the box cover and connected with the box body, the mounting part is arranged in the middle of the beam body and located on the side, away from the box body, of the box cover, and the mounting part is used for being mounted to an electric carrier. In the technical scheme provided by the invention, the box body of the battery device is indirectly connected to the electric vehicle in a manner of externally arranging the mounting beam, and the mounting piece on the mounting beam can be aligned and connected to the mounting position of the electric vehicle by replacing the mounting beams with different shapes or adjusting the connecting position of the mounting beam and the box main body; therefore, the middle mounting adaptation range of the box body of the battery device is enlarged.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electric vehicle. Background Art

[0002] In existing new energy vehicles, the position of the middle mounting point on the power battery pack box usually corresponds to the specific layout position of the mounting point of the vehicle body. When the mounting point layout of the vehicle body changes, the existing mounting point of the box cannot correspond to it, which also makes the mounting adaptability of the existing power battery pack box and the vehicle body poor. Summary of the invention

[0003] The main purpose of this application is to propose a battery device and an electric vehicle, aiming to improve the problem of poor compatibility between existing power battery packs and the middle mounting of the vehicle body.

[0004] In a first aspect, the battery device proposed in the present application comprises: A box body, comprising a box body and a box cover, wherein the box cover is arranged on one side of the box body along a first direction, and the box cover and the box body together define an installation cavity, in which a battery cell is arranged; and The mounting beam comprises a beam body and a mounting component. The beam body is arranged on the side of the box cover away from the box body along the first direction and connected to the box body. The mounting component is arranged in the middle of the beam body and is located on the side of the box cover away from the box body. The mounting component is used to be mounted on an electrical carrier.

[0005] The technical solution provided by the present application is to arrange a mounting beam on the outer side of the box cover relative to the installation cavity, the beam body of the mounting beam can be connected to the box body, and the mounting part arranged in the middle can be mounted and connected to the power carrier, forming a gravity transfer path from the box body to the beam body, then from the beam body to the mounting part, and finally from the mounting part to the power carrier. On the basis of making as few changes to the box body as possible, the mounting connection between the box body of the battery device and the power carrier is realized. The mounting scheme is less affected by the mounting layout of the box body itself. Mounting beams with corresponding mounting layouts can be designed for different models of power carriers and connected to the box body, thereby improving the adaptability of the box body of the battery device and the power carrier.

[0006] In some embodiments, the beam body includes two beam plates that are opposite and connected along a first direction, the two beam plates include a first beam plate and a second beam plate, the first beam plate is arranged away from the box cover relative to the second beam plate, and a first through hole is provided on the first beam plate; The mounting member is arranged corresponding to the first through hole, and is at least partially fixedly arranged between the first beam plate and the second beam plate.

[0007] Among them, at least part of the mounting component is fixedly set between the two beam plates, which is equivalent to embedding at least part of the mounting component into the beam body. On the one hand, it can increase the connection area between the mounting component and the beam body to ensure the stability of the connection; on the other hand, it can also make the effective part of the mounting component used for mounting connection along the first direction coincide with the beam body, thereby controlling the overall size of the mounting beam along the first direction, ensuring that the box cover is as close as possible to the electrical vehicle, thereby reducing the risk of collision with the bottom of the box body; not only that, the relative arrangement of the two beam plates, combined with the connection and fixation of the mounting component to the two beam plates, can not only ensure the overall mounting strength of the mounting beam, but also have the effect of reducing weight, thereby meeting the lightweight design requirements of the battery device.

[0008] In some embodiments, the mounting component includes a nut nest having a first threaded hole, and the first threaded hole is used for connection with a mounting bolt of the electric carrier.

[0009] Among them, the mounting part is connected to the mounting bolt of the electric carrier through the nesting of nuts, and the mounting part is connected through a threaded pair so that it can withstand a large tensile stress load to ensure a firm connection.

[0010] In some embodiments, the nut is nested and extends out of the first through hole along the first direction.

[0011] Among them, the nut nesting extends out of the through-hole setting, so that the first threaded hole on the nut nesting has a longer connection length, ensuring that the mounting bolt and the first threaded hole have a larger connection contact area, further improving the connection firmness between the nut nesting and the mounting bolt.

[0012] In some embodiments, an annular protrusion is formed on the peripheral side of the end of the nut nest away from the box cover, the annular protrusion corresponds to the peripheral edge of the first through hole, and is fixedly connected to a side of the first beam plate close to the second beam plate.

[0013] Among them, by arranging an annular protrusion on the peripheral side of the nut nest, and fixing the periphery of the annular protrusion corresponding to the first through hole to the side of the first beam plate close to the second beam plate, on the one hand, the annular protrusion increases the connection area between the nut nest and the first beam plate, and improves the connection firmness between the nut nest and the first beam plate; on the other hand, the annular protrusion is fixedly connected to the side of the first beam plate close to the second beam plate, which can provide a good supporting effect for the first beam plate and the second beam plate, thereby ensuring the rigidity of the beam body.

[0014] In some embodiments, the peripheries of the two beam plates are fixedly connected and define a cavity therebetween; The mounting component is at least partially disposed in the cavity.

[0015] Among them, the peripheries of the two beams are fixedly connected and a cavity is defined between them, that is, the two beams are connected to form a hollow shell structure. The existence of the hollow shell structure can further enhance the mounting capacity of the beam body.

[0016] In some embodiments, a first overlapping edge is provided at the periphery of each beam plate, and the first overlapping edges of two beam plates are fixedly connected.

[0017] Among them, by fixedly connecting the two first overlaps, the connection area of ​​the two beams and slabs can be increased, that is, the connection strength between the two beams and slabs is improved, and during the connection process, the two first overlaps can be stably stacked, which is conducive to maintaining the relative position, thereby reducing the difficulty of connection.

[0018] In some embodiments, the first overlapped edge is formed with a plurality of reinforcement segments in the circumferential direction of the beam plate, and the reinforcement segments are recessed toward or away from the box cover relative to the peripheral area thereof.

[0019] Among them, by processing multiple reinforcement sections on the first overlap, since the reinforcement sections are recessed relative to their surrounding areas, the connection area of ​​the two first overlaps is increased, which can further improve the connection strength of the two beams and slabs.

[0020] In some embodiments, the first overlap has a drainage section in the circumferential direction of the beam plate; The drainage sections of the two first overlapping edges are at least partially spaced apart and define a drainage channel, wherein the drainage channel is connected to the cavity.

[0021] Among them, the two beam plates are at least partially spaced apart at the drainage section of the first overlapping edge, thereby defining a drainage channel connected to the cavity. When water accumulates in the cavity of the beam body due to wading of the electric vehicle, the accumulated water can be discharged through the drainage channel, which can effectively prevent the inner wall of the cavity from rusting due to long-term contact with the accumulated water, thereby ensuring the service life of the mounting beam.

[0022] In some embodiments, the box cover has a second overlapped edge at a side end in the second direction, and the second overlapped edge is connected to the box body; The first overlap has an overlap connection section at the side end in the second direction, the first overlap is connected to the second overlap, and the drainage section is located in the overlap connection section; Wherein, the first direction and the second direction are arranged to intersect.

[0023] Among them, since the beam body is located on the side of the box cover away from the box body, the first overlap of the beam plate is connected to the box body through the overlap connection section. It can be determined that the overlap connection section is closer to the box body in the first direction than the rest of the first overlap. A drainage section is arranged in the overlap connection section. When water accumulates in the cavity of the beam body, the accumulated water can flow autonomously to the overlap connection section with lower terrain and be discharged outward through the drainage channel defined here, which can improve the drainage efficiency of the beam body and is conducive to draining the accumulated water.

[0024] In some embodiments, the drainage section is recessed away from the tank cover relative to its surrounding area.

[0025] Among them, by setting the drainage section in a form of a depression away from the box cover relative to its surrounding area, the drainage sections of the two first overlapping edges are arranged at intervals due to their own different degrees of depression to define a drainage channel, and the depression of the drainage section is also conducive to improving the structural strength of the first overlapping edge.

[0026] In some embodiments, a drainage hole is provided at a position of the second beam plate close to the box body.

[0027] Among them, since the second beam plate is arranged closer to the box cover than the first beam plate, a drainage hole is arranged at a position of the second beam plate close to the box body, which is conducive to the autonomous discharge of accumulated water in the cavity through the drainage hole, and can effectively prevent the inner wall of the cavity from rusting due to long-term contact with accumulated water, thereby ensuring the service life of the mounting beam.

[0028] In some embodiments, the second beam plate is arranged in contact with the box cover and has a liquid collecting area, the liquid collecting area is arranged concavely away from the box cover relative to its peripheral area, and defines a liquid collecting cavity together with the box cover, and the liquid collecting cavity extends to the side of the second beam plate to form a cavity opening; The drainage hole is arranged in the liquid collecting area.

[0029] Among them, by setting the second beam plate in close contact with the box cover, it is helpful to reduce the size of the battery device along the first direction and reduce the risk of the bottom of the box body encountering a collision. On this basis, the second beam plate can define a liquid collecting cavity together with the box cover through its liquid collecting area, and the drainage hole is arranged in the liquid collecting area, which can collect the accumulated water in the cavity of the beam body into the liquid collecting cavity, and the accumulated water can be discharged toward the side of the second beam plate through the cavity opening of the liquid collecting cavity. This scheme utilizes the recessed setting of the liquid collecting area away from the box cover, which can not only achieve the purpose of diverting drainage, but also can improve the structural strength of the second beam plate.

[0030] In some embodiments, the box cover has a first reinforcement area and a second reinforcement area connected to each other, the first reinforcement area and the second reinforcement area are recessed toward the box body relative to their respective peripheral areas, and the second reinforcement area extends to the side end of the box cover; The second beam plate is accommodated in the first reinforcement area, and the cavity opening of the liquid collecting cavity is arranged corresponding to the second reinforcement area.

[0031] Among them, since the first reinforced area and the second reinforced area are recessed toward the box body, the structural strength of the box body can be improved, and the second beam plate is accommodated in the first reinforced area, which can further reduce the distance between the beam body and the box body in the first direction, that is, reduce the size of the battery device along the first direction. On this basis, since the second reinforced area is connected to the first reinforced area, the cavity opening of the liquid collecting chamber can directly discharge liquid to the second reinforced area, and the accumulated water can flow out to the side end of the box cover under the guidance of the second reinforced area. This solution takes into account the improvement of the structural strength of the box cover, the reduction of the size of the battery device along the first direction, and the guidance of the external discharge of the accumulated water in the liquid collecting chamber.

[0032] In some embodiments, the box body includes a reinforcing beam disposed in the mounting cavity; The box cover is formed with a second through hole corresponding to the reinforcing beam; The battery device includes a connecting member extending along the first direction, with one end of the connecting member connected to the reinforcing beam and the other end extending out of the second via hole and connected to the beam body.

[0033] Among them, through the setting of the connecting parts, the reinforcing beam of the box body and the beam body of the mounting beam can be connected, which plays the role of indirectly connecting the mounting beam and the box body, providing more connection points between the mounting beam and the box body, and can improve the connection strength between the two.

[0034] In some embodiments, both ends of the beam body along the second direction are connected to the box body; A plurality of the mounting members are arranged along the second direction, and at least one connecting member is provided between two adjacent mounting members; Wherein, the first direction and the second direction are arranged to intersect.

[0035] Among them, arranging multiple mounting parts on the beam body can meet the special layout requirements of multiple mounting points for applied electric carriers, and the two ends of the beam body along the second direction and multiple connecting parts are all connection points between the mounting beam and the box body. By arranging connecting parts between two adjacent mounting parts, the larger suspended span between the two ends of the beam body can be divided into multiple smaller suspended spans, thereby reducing the possible deformation of the beam body during mounting.

[0036] In some embodiments, the connecting member includes a first connecting portion, one end of which is connected to the reinforcing beam, and the other end of which is in contact with the box cover.

[0037] Among them, through the setting of the first connecting part, the reinforcing beam of the box body can be connected. At the same time, the first connecting part can also abut the box cover, playing the role of supporting the middle part of the box cover to prevent the larger extended surface on the box cover from bulging and reduce the noise generated thereby.

[0038] In some embodiments, an annular sealing groove is provided at the end of the first connecting portion corresponding to the second through hole, a sealing gasket is accommodated in the annular sealing groove, and the sealing gasket is sealed against the box cover.

[0039] Among them, an annular sealing groove is set at the end of the first connecting part abutting the box cover corresponding to the second through hole, which can accommodate a sealing gasket. Since the sealing gasket can also seal against the box cover, the sealing of the box body is ensured on the basis of opening the second through hole on the box cover.

[0040] In some embodiments, the end surface of the reinforcing beam facing the box cover is provided with a plug-in groove; The end of the first connecting portion is arranged in the plug-in slot.

[0041] Among them, a plug-in groove is opened on the reinforcing beam for the end of the first connecting part to be set, which can provide a larger contact area between the end of the first connecting part and the reinforcing beam, thereby ensuring the connection strength between the first connecting part and the reinforcing beam.

[0042] In some embodiments, the plug-in slot is provided with a notch; and the first connecting portion is welded to the side wall of the plug-in slot at the notch.

[0043] Among them, due to the existence of the notch, the connection position between the plug-in slot and the first connecting part can be exposed on the side of the reinforcing beam. By connecting the side wall of the plug-in slot and the first connecting part at the notch by welding, more welding points can be obtained, thereby further improving the connection strength between the first connecting part and the reinforcing beam.

[0044] In some embodiments, one end of the first connection portion welded to the side wall of the plug slot is hollow.

[0045] Among them, one end of the first connection part welded to the side wall of the plug-in slot is hollow, which is conducive to welding through the first connection part and improving the welding quality of the welding point. Not only that, the hollow setting of the first connection part can also reduce the weight of the first connection part, meeting the lightweight design requirements of the battery device.

[0046] In some embodiments, the beam body is disposed against the box cover, and a third through hole is provided corresponding to the second through hole; The connecting member includes a second connecting portion, which has a first end and a second end located in the first direction, the first end is located on the side of the beam body away from the box cover and abuts against the beam body, and the second end extends from the third through hole and the second through hole and is connected to the first connecting portion.

[0047] Among them, since the first connecting part abuts the box cover in the installation cavity of the box body, combined with the beam body abutting the box cover, and the first end of the second connecting part abutting the beam body, it is achieved that the box cover and the beam body are clamped and fixed from both sides by the first connecting part and the second connecting part respectively, thereby realizing a fixed connection between the connecting part and the beam body. Not only that, this scheme also realizes relative fixation between the beam body and the box cover, thereby improving the stiffness and mode of the box cover.

[0048] In some embodiments, the box cover has a third reinforcement area disposed adjacent to the second through hole, and the third reinforcement area is recessed relative to a peripheral area thereof toward or away from the box body.

[0049] Among them, since the connecting piece connects the box cover and the beam body through the second through hole, the box cover may be subjected to stress at the second through hole during the mounting process of the mounting beam. By setting a third reinforcement area at a position of the box cover adjacent to the second through hole and the recessed setting of the third reinforcement area, the structural strength of the box cover can be increased.

[0050] In some embodiments, a second threaded hole is provided at one end of the first connecting portion abutting against the box cover; The second connection portion is provided with a stud penetrating through the second through hole, and the stud is connected to the second threaded hole.

[0051] The first connection part and the second connection part are connected via a stud and a second threaded hole. This threaded connection method has high connection strength, simple structure, and is easy to operate.

[0052] In some embodiments, the beam body includes a first beam plate and a second beam plate that are opposite and connected along a first direction, the second beam plate abuts against the box cover, the first beam plate and the second beam plate are respectively provided with third through holes corresponding to the second through holes, and a support portion is provided between the first beam plate and the second beam plate; A pressing protrusion is provided on the peripheral side of the first end of the second connecting portion corresponding to the supporting portion, and the pressing protrusion abuts against the first beam plate.

[0053] Among them, the purpose of reducing the weight of the beam body is achieved by arranging the first beam plate and the second beam plate at intervals in the first direction. On this basis, since the first beam plate and the second beam plate need to bear the abutment forces from the second connection part and the first connection part respectively, a support part is provided by arranging a holding protrusion corresponding to the peripheral side of the second connection part between the first beam plate and the second beam plate, the abutment force can be borne by the support part to improve the rigidity of the beam body.

[0054] In some embodiments, the support portion includes a through hole nest, two ends of the through hole nest are respectively fixedly connected to the first beam plate and the second beam plate, and the through hole of the through hole nest is arranged corresponding to the second through hole.

[0055] Among them, through the arrangement of nested through holes, support can be provided for the first beam plate and the second beam plate at various positions around the second through hole, further improving the rigidity of the beam body.

[0056] In some embodiments, a second connecting portion is provided at one end of the connecting member away from the reinforcing beam, and a third threaded hole is provided on the second connecting portion along the first direction, and the third threaded hole is used for connection with a mounting bolt of an electric carrier.

[0057] Among them, while connecting the mounting beam and the reinforcing beam, the connecting piece can also be connected to the mounting bolts of the corresponding model of the power carrier through the third threaded hole on its second connecting part, which is equivalent to playing a mounting role, thereby improving the mounting firmness between the battery device and the power carrier.

[0058] In some embodiments, the box body includes a surrounding frame and a bottom plate, the bottom plate is arranged on one side of the surrounding frame, and the box cover is arranged on the other side of the surrounding frame; The beam body has two connecting ends at two ends of the second direction, and the two connecting ends are respectively connected to two ends of the surrounding frame along the second direction; Wherein, the first direction and the second direction are arranged to intersect.

[0059] In this solution, the frame of the box body usually has a high structural strength, and the two connecting ends of the beam body are respectively connected to the two ends of the frame along the second direction, thereby improving the connection reliability between the beam body and the box body. Moreover, the way in which the connecting ends of the beam body are connected to the frame has little effect on the box cover, thereby ensuring the sealing effect of the box body; moreover, since the beam body is connected to the frame at both ends in the second direction, it can ensure that the center of gravity of the box body is within the span of the beam body along the second direction, thereby improving the stability of the battery device when mounted on the power carrier.

[0060] In some embodiments, the box cover is provided with second overlapped edges at both ends in the second direction, and the two second overlapped edges are respectively connected to the surrounding frame; The two connecting ends are respectively connected to the corresponding second overlapping edges.

[0061] Among them, the box cover is connected to the frame of the box body through the second overlap, which can increase the contact area between the two, thereby improving the connection strength and ensuring the sealing performance of the box body. On this basis, the connecting end of the beam body is indirectly connected to the frame through the second overlap, which can also ensure that the gravity of the box body is transmitted to the beam body along the first direction. This connection method allows the beam body to be pre-set on the box cover, and finally the gravity transfer from the box body to the beam body is realized through the connection between the box cover and the box body. This solution can improve the assembly efficiency of the battery device by pre-connecting the beam body and the box cover.

[0062] In some embodiments, the connection end is welded to the corresponding second overlap; and / or, The connecting end and the corresponding second overlap are connected to the surrounding frame by bolts.

[0063] Among them, welding as an integrated connection method has low requirements for the structural environment of the connection point. As long as there is a sufficient contact area between the two connection points, the connection end of the beam body is welded to the corresponding second overlap. The connection method is direct and simple, which can ensure the firmness of the connection between the connection end and the second overlap, and has little impact on the main part of the middle part of the box cover. Based on the fact that bolts are mostly used between the box cover and the box body, this solution can connect the second overlap and the connection end as a whole to the frame of the box body through bolts, without adding additional connection structure to the box body.

[0064] In a second aspect, the present application also proposes an electric vehicle, which includes the above-mentioned battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0066] Figure 1 A simplified structural diagram of an embodiment in which the electric vehicle provided in the present application is a vehicle; Figure 2 A schematic diagram of an exploded structure of a battery device according to an embodiment of the present application; Figure 3A schematic top view of the structure of an embodiment of a battery device provided in the present application; Figure 4 for Figure 3 Structural diagram of the middle section AA; Figure 5 for Figure 3 Schematic diagram of the structure of the middle section BB; Figure 6 for Figure 5 A magnified schematic diagram of the local structure; Figure 7 for Figure 3 Schematic diagram of the assembly structure of the middle box cover and the mounting beam; Figure 8 for Figure 7 Schematic diagram of the structure of the middle box cover; Fig. 9 for Figure 7 A magnified schematic diagram of the local C in the middle; Fig.10 for Figure 7 A magnified schematic diagram of the local D in the middle; Fig.11 for Figure 7 A magnified schematic diagram of the local E in the middle; Fig.12 for Figure 7 A top view of the structure of the middle box cover and the mounting beam; Fig.13 for Fig.12 Schematic diagram of the structure of the FF in the middle section; Fig.14 for Fig.13 A magnified schematic diagram of part I in the middle; Fig.15 for Fig.13 The structural diagram of the first beam-slab in FIG. Fig.16 for Fig.13 Structural schematic diagram of the second beam slab; Fig.17 for Fig.16 A magnified schematic diagram of the local J in the middle; Fig.18 for Fig.12 Schematic diagram of the structure of GG in the middle section; Fig.19 for Fig.12 Schematic diagram of the structure of the middle section HH.

[0067] Description of Figure Numbers: 1000. Vehicles; 100, battery device; 200, controller; 300, motor; 400, vehicle body frame; 410, mounting bolt; 1. Box body; 11. Box body; 11a. Installation cavity; 111. Reinforcement beam; 111a. Insertion slot; 1111a. Notch; 112. Frame; 113. Bottom plate; 12. Box cover; 12a. First reinforcement area; 12b. Second reinforcement area; 12c. Third reinforcement area; 121. Second overlap; 122. Second through hole; 2. Mounting beam; 2a. Cavity; 21. Beam body; 211. Beam plate; 211a. First beam plate; 211b. Second beam plate; 211c. Liquid collecting area; 212. Connection end; 2111. First overlap; 2111a. Overlap connection section; 2111b. Reinforcement section; 2 111c, drainage section; 2111d, drainage channel; 2112, first through hole; 2113, third through hole; 2114, drainage hole; 2115, weight reduction hole; 22, mounting part; 221, nut nesting; 2211, first threaded hole; 222, annular protrusion; 23, connecting part; 231, first connecting part; 2311, annular sealing groove; 2312, second threaded hole; 232, second connecting part; 2321, third threaded hole; 2322, stud; 2323, holding protrusion; 233, sealing pad; 24, supporting part; 241, through hole nesting; 2411, through hole; 3, battery cell; X, first direction; Y, second direction; Z, third direction.

[0068] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0069] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0071] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0072] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0073] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0074] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0075] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0076] In existing new energy vehicles, the position of the middle mounting point of the power battery pack usually corresponds to the specific layout position of the mounting point of the vehicle body. Since the layout positions of the mounting points on the bodies of vehicles of different models are usually different, the power battery pack can usually only be installed on the body of a specific model of vehicle after production is completed. This makes the existing power battery packs less compatible with the middle mounting of different vehicle bodies.

[0077] Analyzing the causes of the above problems, it can be known that the main reason for the poor compatibility of existing power battery packs with the middle mounting of different vehicle bodies is that the middle mounting point of the existing power battery pack is usually set on the reinforcing beam inside the box body, and is mounted to the vehicle body through the mounting structure through the cover plate. Since the layout position of the reinforcing beam inside the box body is related to the impact strength and stability of the box body structure, the industry usually does not easily choose to adjust the layout position of the reinforcing beam to meet the mounting requirements of the power battery pack for different vehicle bodies. Since the solution of adjusting the distribution position of the reinforcing beam inside the box body is less feasible, it is possible to consider placing external mounting parts on the box body. On the basis of not changing the box structure of the power battery pack, it is mounted to the vehicle body through the external mounting parts. By designing mounting parts with different mounting layouts for different types of vehicle bodies, the adaptability of the power battery pack box and the vehicle body can be improved by replacing the mounting parts.

[0078] The battery device disclosed in the embodiment of the present application can be used to provide electric energy for electric vehicles, wherein the electric vehicles can be but are not limited to battery vehicles, electric vehicles, ships, spacecraft, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles, spacecraft, etc.

[0079] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electric vehicle according to an embodiment of the present application.

[0080] Please refer to Figure 1 , Figure 1 The electric vehicle provided for this application is a simplified structural diagram of an embodiment of a vehicle. Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is arranged inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000.

[0081] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0082] After the battery device 100 provided in the present application is applied to an electric vehicle, it can at least improve the problem of poor mounting compatibility between the existing power battery pack and the vehicle body.

[0083] To facilitate understanding of the battery device 100 provided in the present application, the following is a description with reference to the accompanying drawings, wherein: Figure 2 A schematic diagram of an exploded structure of a battery device according to an embodiment of the present application; Figure 3 A schematic top view of the structure of an embodiment of a battery device provided in the present application; Figure 4 for Figure 3 Structural diagram of the middle section AA; Figure 5 for Figure 3 Schematic diagram of the structure of the middle section BB; Figure 6 for Figure 5 A magnified schematic diagram of the local structure; Figure 7 for Figure 3 Schematic diagram of the assembly structure of the middle box cover and the mounting beam; Figure 8 for Figure 7 Schematic diagram of the structure of the middle box cover; Fig. 9 for Figure 7 A magnified schematic diagram of the local C in the middle; Fig.10 for Figure 7 A magnified schematic diagram of the local D in the middle; Fig.11 for Figure 7 A magnified schematic diagram of the local E in the middle; Fig.12 for Figure 7 A top view of the structure of the middle box cover and the mounting beam; Fig.13 for Fig.12 Schematic diagram of the structure of the FF in the middle section; Fig.14 for Fig.13 A magnified schematic diagram of part I in the middle; Fig.15 for Fig.13 Structural schematic diagram of the first beam-slab in FIG. Fig.16 for Fig.13 Structural schematic diagram of the second beam slab; Fig.17 for Fig.16 A magnified schematic diagram of the local J in the middle; Fig.18 for Fig.12 Schematic diagram of the structure of GG in the middle section; Fig.19 for Fig.12 Schematic diagram of the structure of the middle section HH.

[0084] See also Figures 2 to 4 In one embodiment of the present application, the battery device 100 includes a box body 1 and a mounting beam 2, the box body 1 includes a box body 11 and a box cover 12, the box cover 12 is covered on one side of the box body 11 along the first direction X, the box cover 12 and the box body 11 jointly define an installation cavity 11a, and a battery cell 3 is arranged in the installation cavity 11a; the mounting beam 2 includes a beam body 21 and a mounting member 22, the beam body 21 is arranged on a side of the box cover 12 away from the box body 11 along the first direction, and is connected to the box body 11, the mounting member 22 is arranged in the middle of the beam body 21, and is located on the side of the box cover 12 away from the box body 11, and the mounting member 22 is used to be mounted to an electrical carrier.

[0085] It should be noted that the first direction X mentioned in this embodiment and the second direction Y and the third direction Z mentioned in the following embodiments are usually three directions that intersect each other in three-dimensional space, and the angle between two adjacent directions is usually 90 degrees, that is, the first direction X, the second direction Y and the third direction Z are perpendicular to each other, but it is not limited to this, and the angle between two adjacent directions may also be any other angle value. After the battery device 100 is correctly installed on the power carrier, its first direction X usually coincides with the up and down direction of the power carrier.

[0086] The "box 1" is a main loading component of the battery device 100. The battery device 100 is installed on the power carrier through the box 1, and the battery cell 3 is installed through the installation cavity 11a of the box 1. The basic structure of the box 1 includes a box body 11 and a box cover 12. The box cover 12 is arranged on the box body 11 and defines the installation cavity 11a together with the box body 11. Generally speaking, the battery cell 3 is generally arranged on the box body 11. After the battery device 100 is mounted on the power carrier, the box cover 12 is generally close to the power carrier, and the box body 11 is generally away from the power carrier; the installation cavity 11a can be mainly formed in the box body 11. At this time, the box body 11 can be understood as a basin-shaped structure (such as Figure 2 As shown in ), the box cover 12 is provided on the box body 11 to cover the installation cavity 11a; the installation cavity 11a can also be mainly formed on the box cover 12. In this case, the box cover 12 can be understood as a cover-shaped structure. The box cover 12 is provided on the box body 11 to cover the battery cell 3 carried on the box body 11 into the installation cavity 11a. Of course, the structure of the box body 1 is not limited to this, and this embodiment does not limit it; in the battery device 100, a plurality of battery cells 3 are usually included, and the plurality of battery cells 3 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of battery cells 3 are both connected in series and in parallel. The plurality of battery cells 3 can be directly connected in series, in parallel, or in mixed connection, and then the battery cell 3 composed of the plurality of battery cells 3 is accommodated in the installation cavity 11a of the box body 1 as a whole; of course, the battery cell 3 can also be a plurality of battery cells 3 that are first connected in series, in parallel, or in mixed connection to form a battery module, and the plurality of battery modules are then connected in series, in parallel, or in mixed connection to form the battery cell 3, and accommodated in the installation cavity 11a of the box body 1. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 3 or multiple battery modules, and may also include a heat exchange component for realizing thermal control of the battery cells 3. Each battery cell 3 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 3 may be cylindrical, flat, rectangular or in other shapes.

[0087] The "mounting beam 2" includes a beam body 21 and a mounting member 22, and is connected to the box body 11 through the beam body 21, and is connected to the power carrier through the mounting member 22. The mounting beam 2 is located as a whole on the side of the box cover 12 away from the box body 11 along the first direction X. After the battery device 100 is installed on the vehicle 1000, the mounting beam 2 is located between the box cover 12 and the vehicle 1000; there are many possible connection methods between the beam body 21 and the box body 11, which can be generally divided into direct connection and indirect connection, among which direct connection is easy to understand, that is, the connection point between the beam body 21 and the box body 11 is in direct contact, and indirect connection can be understood as that the connection point between the beam body 21 and the box body 11 is transferred through other components. However, no matter what connection method is used, the connection point between the beam body 21 and the box body 11 should correspond in the first direction X, that is, regardless of whether the beam body 21 and the box body 11 are separated by other components (such as a sealing gasket), the gravity of the box body 11 should be transmitted to the beam body 21 along the first direction X.

[0088] Since the function of the beam body 21 is to provide correspondingly arranged mounting parts 22 for the mounting point layout of the applied electric carrier, there are many possibilities for its specific structure. For example, the beam body 21 can be arranged in an elongated shape in the second direction Y, and a plurality of mounting parts 22 arranged along the second direction Y can be arranged thereon. For another example, the beam body 21 can be arranged to extend in a winding manner in the third direction Z, and a plurality of mounting parts 22 arranged in sequence along its extension path can be arranged thereon. Of course, the beam body 21 is not necessarily an elongated extension structure, but can also be a planar extension structure. For example, the beam body 21 can also be a plate-like structure, and connected to the periphery of the box body 11 through its periphery, so that a plurality of mounting parts 22 with arbitrary layouts can be provided within its extension plane. The present embodiment does not limit the specific structure of the beam body 21, as long as it can provide mounting parts 22 for mounting parts 22. It is sufficient to provide a connection foundation corresponding to the middle part of the box cover 12; the function of the "mounting component 22" is to connect the beam body 21 and mount it to the power carrier (when the power carrier is a vehicle, the mounting component 22 is used to mount it to the vehicle body frame 400). The connection method between the mounting component 22 and the beam body 21 can be a snap connection or a threaded connection. The setting position of the mounting component 22 on the beam body 21 can have various situations. For example, the mounting component 22 can be set on the side of the beam body 21 away from the box cover 12, or it can be set on the side of the beam body 21 along the second direction Y. This embodiment does not limit this. The mounting method of the mounting component 22 and the power carrier can be bolt connection mounting or hook limit mounting (the mounting component 22 hooks the vehicle's body frame 400 through the hook), which is not limited in this embodiment.

[0089] The technical solution provided by the present application is to set a mounting beam 2 on the outer side of the box cover 12 relative to the installation cavity 11a, and the beam body 21 of the mounting beam 2 can be connected to the box body 11, and the mounting component 22 arranged in the middle can be mounted and connected to the electrical carrier, forming a gravity transfer path from the box body 11 to the beam body 21, then from the beam body 21 to the mounting component 22, and finally from the mounting component 22 to the electrical carrier. On the basis of making as few changes to the box body 1 as possible, the mounting connection between the box body 1 of the battery device 100 and the electrical carrier is realized. The mounting scheme is less affected by the mounting layout of the box body 1 itself, and the mounting beam 2 with the corresponding mounting layout can be designed for different types of electrical carriers, thereby improving the adaptability of the box body 1 of the battery device 100 to the electrical carrier.

[0090] See also Fig.12 , Fig.18 and Fig.19 In some embodiments, the beam body 21 includes two beam plates 211 that are opposite and connected along the first direction X, the two beam plates 211 include a first beam plate 211a and a second beam plate 211b, the first beam plate 211a is arranged away from the box cover 12 relative to the second beam plate 211b, and a first through hole 2112 is provided on the first beam plate 211a; the mounting member 22 is arranged corresponding to the first through hole 2112, and is at least partially fixedly arranged between the first beam plate 211a and the second beam plate 211b.

[0091] It should be noted that "the beam body 21 includes two beam plates 211 that are opposite and connected along the first direction X", wherein the connection between the two beam plates 211 can be divided into direct connection and indirect connection. In the case of indirect connection, other connecting components can be arranged between the two beam plates 211. At this time, the two beam plates 211 are relatively spaced apart in the first direction X. In the case of direct connection, some areas of the two beam plates 211 are in direct contact, and other areas are relatively spaced apart, and the mounting member 22 is arranged between the two beam plates 211 through the other areas; "a first through hole 2112 is arranged on the first beam plate 211a", and the first through hole 2112 is usually arranged to penetrate along the first direction X, and "the mounting member 22 corresponds to the first through hole 2112 “Set” means that the part of the mounting component 22 actually used for mounting connection is set corresponding to the first through hole 2112. For example, the part used for mounting connection can be a connecting stud 2322. At this time, the connecting stud 2322 should extend out of the first through hole 2112 along the first direction X to connect to the mounting nut of the electrical carrier; “the mounting component 22 is at least partially fixedly set between the first beam plate 211a and the second beam plate 211b” means that the mounting component 22 can be completely between the first beam plate 211a and the second beam plate 211b, or only a small part of the structure can be between the first beam plate 211a and the second beam plate 211b, and the rest of the structure can be on one side of the first beam plate 211a or the second beam plate 211b. This is not limited to the present embodiment.

[0092] According to the above technical solution, at least part of the mounting member 22 is fixedly arranged between the two beam plates 211, which is equivalent to embedding at least part of the mounting member 22 into the beam body 21. On the one hand, the connection area between the mounting member 22 and the beam body 21 can be increased to ensure the stability of the connection. On the other hand, the effective part of the mounting member 22 used for mounting connection along the first direction X can be overlapped with the beam body 21, thereby controlling the overall size of the mounting beam 2 along the first direction X, ensuring that the box cover 12 is as close as possible to the electrical vehicle, thereby reducing the risk of the bottom of the box body 11 encountering a collision; not only that, the relative arrangement of the two beam plates 211, combined with the connection and fixation of the two beam plates 211 by the mounting member 22, can not only ensure the overall mounting strength of the mounting beam 2, but also have the effect of reducing weight, thereby meeting the lightweight design requirements of the battery device 100.

[0093] See also Figure 4 and Fig.18 In some embodiments, the mounting member 22 includes a nut nest 221 having a first threaded hole 2211 for connection with a mounting bolt 410 of an electric carrier.

[0094] It should be noted that the mounting part 22 may include only the nut nesting 221, or may also include other connection structures or limiting structures in addition to the nut nesting 221, and this embodiment is not limited to this; the nut nesting 221 usually has a first threaded hole 2211 located in the middle and passing through it axially. It should be understood that in the embodiment of the present application, the first threaded hole 2211 of the nut nesting 221 corresponds to the first through hole 2112 on the first beam plate 211a, and the inner diameter of the first threaded hole 2211 should be smaller than the aperture of the first through hole 2112, so that the connection between the mounting bolt 410 and the nut nesting 221 is not blocked by the first through hole 2112. For example, when the nut nesting 221 is entirely between the first beam plate 211a and the second beam plate 211b, it is necessary to pass through the first through hole 2112 to be able to connect to the nut nesting 221.

[0095] According to the above technical solution, the mounting component 22 is connected to the mounting bolt 410 of the electric carrier through the nut nesting 221, and the mounting component 22 is able to withstand a large tensile stress load through the threaded connection to ensure a firm connection.

[0096] See also Figure 4 and Fig.18 In some embodiments, the nut nest 221 extends out of the first through hole 2112 along the first direction X.

[0097] It should be noted that “the nut nest 221 extends out of the first through hole 2112 along the first direction X” can also be understood as that the first threaded hole 2211 extends along the first direction X to the side of the first beam plate 211a away from the box cover 12.

[0098] According to the above technical solution, the nut nesting 221 extends out of the through-hole setting, so that the first threaded hole 2211 on the nut nesting 221 has a longer connection length, ensuring that the mounting bolt 410 and the first threaded hole 2211 have a larger connection contact area, further improving the connection firmness between the nut nesting 221 and the mounting bolt 410.

[0099] See also Figure 4 and Fig.18 In some embodiments, an annular protrusion 222 is formed on the peripheral side of the end of the nut nest 221 away from the box cover 12, the annular protrusion 222 corresponds to the periphery of the first through hole 2112, and is fixedly connected to the side of the first beam plate 211a close to the second beam plate 211b.

[0100] It should be noted that, “the end of the nut nest 221 away from the box cover 12” can also be understood as the end of the nut nest 221 close to the first beam plate 211a, and the “annular protrusion 222” is formed on the peripheral side of the nut nest 221, and its specific molding methods include integral casting and welding connection molding; since the first through hole 2112 is formed on the first beam plate 211a, the “periphery of the first through hole 2112” corresponds to the solid area on the first beam plate 211a adjacent to the first through hole 2112.

[0101] According to the above technical solution, an annular protrusion 222 is provided on the peripheral side of the nut nesting 221, and the periphery of the annular protrusion 222 corresponding to the first through hole 2112 is fixedly connected to the side of the first beam plate 211a close to the second beam plate 211b. On the one hand, the annular protrusion 222 increases the connection area between the nut nesting 221 and the first beam plate 211a, and improves the connection firmness between the nut nesting 221 and the first beam plate 211a. On the other hand, the annular protrusion 222 is fixedly connected to the side of the first beam plate 211a close to the second beam plate 211b, which can provide a good support effect for the first beam plate 211a and the second beam plate 211b, thereby ensuring the rigidity of the beam body 21.

[0102] See also Figure 4 and Fig.18 In some embodiments, the peripheries of the two beam plates 211 are fixedly connected and define a cavity 2a therebetween; the mounting member 22 is at least partially disposed in the cavity 2a.

[0103] It should be noted that the beam plate 211, as a plate-like structure, generally has an extended plane, and the "periphery of the beam plate 211" mentioned in this embodiment refers to the periphery of the beam plate 211 along its extended plane, for example, Fig.12 In the illustrated embodiment, the extension plane of the beam plate 211 is parallel to the planes where the second direction Y and the third direction Z are located, that is, it intersects the first direction X at right angles.

[0104] According to the above technical solution, the peripheries of the two beam plates 211 are fixedly connected and a cavity 2a is defined between the two beam plates 211 , that is, the two beam plates 211 are connected to form a hollow shell structure. The existence of the hollow shell structure can further enhance the mounting capacity of the beam body 21 .

[0105] Specifically, see Fig.15 A weight-reducing hole 2115 connected to the cavity 2a is formed on the first beam plate 211a. On the premise of meeting the mounting strength of the mounting beam 2, the weight-reducing hole 2115 is arranged on the first beam plate 211a to reduce the weight of the mounting beam 2. The embodiment of the present application does not limit the shape, size, number and specific setting position of the weight-reducing hole 2115.

[0106] Please refer to Fig.15 and Fig.16 In some embodiments, a first overlap 2111 is provided on the periphery of each beam plate 211 , and the first overlap 2111 of two beam plates 211 are fixedly connected.

[0107] It should be noted that, since the two beams 211 correspond in the first direction X, their respective first overlaps 2111 should also correspond in the first direction X, and it can also be understood that the projections of the first overlaps 2111 of the two beams 211 in the first direction X coincide; "the first overlap 2111" can also be understood as a flange edge, and its main function is to provide a connection basis. The first overlap 2111 is usually set outward relative to the cavity 2a; "the first overlaps 2111 of the two beams 211 are fixedly connected", and the fixed connection method can be a bolt connection or a welding connection, which is not limited in this embodiment; since the cavity 2a needs to be defined between the two beams 211, the specific structural form of the two beams 211 can be that one of the beams 211 is flatly arranged, and the middle part of the other beam 211 is recessed away from the corresponding beam 211, thereby forming a cavity 2a, and the middle parts of the two beams 211 can also be recessed away from each other, such as Fig.18 and Fig.19 shown.

[0108] According to the above technical solution, by fixedly connecting the two first overlaps 2111, the connection area of ​​the two beams and slabs 211 can be increased, that is, the connection strength between the two beams and slabs 211 is improved, and during the connection process, the two first overlaps 2111 can be stably stacked, which is conducive to maintaining the relative position, thereby reducing the difficulty of connection.

[0109] Specifically, the first overlaps 2111 of the two beam plates 211 are fixedly connected by welding glue, such as Figures 9 and 10 As shown in the figure, the first overlap 2111 area where the triangle is located is the area where the welding glue is fixedly connected, and the first overlap 2111 in this area is arranged to extend horizontally.

[0110] Please read further Figures 9 to 11 In some embodiments, on the circumference of the beam plate 211 , the first overlap 2111 is formed with a plurality of reinforcement segments 2111 b , and the reinforcement segments 2111 b are recessed toward or away from the box cover 12 relative to the peripheral area thereof.

[0111] It should be noted that “the circumferential direction of the beam plate 211” can be understood as the circumferential direction of the two beam plates 211 in the relative direction, that is, the circumferential direction of the beam plate 211 along the first direction X; if the first lap 2111 is isolated from the beam plate 211, it can be understood that the first lap 2111 should be arranged in an annular shape, and in the circumferential direction of the beam plate 211, that is, in the circumferential direction of the first lap 2111, the first lap 2111 has a plurality of reinforcing sections 2111b, and two adjacent reinforcing sections 2111b can be connected or spaced apart with other lap sections, and the reinforcing sections 2111b can be connected to each other or spaced apart with other lap sections. The peripheral area of ​​11b can be another reinforcing section 2111b connected to it, or it can be other overlapping sections. "The reinforcing section 2111b is recessed toward or away from the box cover 12 relative to its peripheral area" can be understood as, multiple reinforcing sections 2111b are recessed toward the box cover 12 relative to their peripheral areas, or they can be recessed away from the box cover 12, or they can be recessed toward and away from the box cover 12 alternately, so as to form a wavy first overlapping edge 2111; it is worth mentioning that the recessed structure of the "reinforcing section 2111b" is usually formed by stamping.

[0112] According to the above technical solution, multiple reinforcement sections 2111b are processed on the first overlap 2111. Since the reinforcement sections 2111b are recessed relative to their surrounding areas, the connection area of ​​the two first overlaps 2111 is increased, which can further improve the connection strength of the two beams and slabs 211.

[0113] See also Fig. 9 and Fig.14In some embodiments, the first overlap 2111 has a drainage section 2111c in the circumferential direction of the beam plate 211; the drainage sections 2111c of the two first overlaps 2111 are at least partially spaced apart and define a drainage channel 2111d, which is connected to the cavity 2a.

[0114] It should be noted that the definitions of “the circumferential direction of the beam and plate 211” and “the first overlap 2111” have been recorded in the above embodiment, and will not be repeated in the following embodiment; since the two first overlaps 2111 correspond in the first direction X, the drainage sections 2111c of the two first overlaps 2111 should also correspond in the first direction X, and “the drainage sections 2111c of the two first overlaps 2111 are at least partially spaced apart” can be understood as that the drainage sections 2111c of the two first overlaps 2111 are spaced apart along their entire length, and the drainage channel 2111c defined in this case is The caliber of 111d is relatively large, and it can also be understood that the drainage sections 2111c of the two first overlapping edges 2111 are spaced apart in parts of their length. Obviously, the caliber of the drainage channel 2111d defined at this time is relatively small; there are many ways to space the two drainage sections 2111c apart, for example, one of the drainage sections 2111c deviates from the other drainage section 2111c and undergoes a concave deformation, or the two drainage sections 2111c deviate from each other and undergo a concave deformation, or the two drainage sections 2111c undergo different degrees of concave deformation along the same direction, and this is not limited in this embodiment.

[0115] According to the above technical solution, the two beam plates 211 are at least partially spaced apart at the drainage section 2111c of the first overlap 2111, thereby defining a drainage channel 2111d connected to the cavity 2a. When water accumulates in the cavity 2a of the beam body 21 due to wading of the electric vehicle, the accumulated water can be discharged through the drainage channel 2111d, which can effectively prevent the inner wall of the cavity 2a from rusting due to long-term contact with the accumulated water, thereby ensuring the service life of the mounting beam 2.

[0116] See also Figure 7 , Fig. 9 and Fig.12 In some embodiments, the box cover 12 has a second overlap 121 at the side end of the second direction Y, and the second overlap 121 is connected to the box body 11; the first overlap 2111 has an overlap connection section 2111a at the side end of the second direction Y, the first overlap 2111 is connected to the second overlap 121, and the drainage section 2111c is located at the overlap connection section 2111a; wherein the first direction X and the second direction Y are intersected.

[0117] It should be noted that the "second overlap 121" can be understood as a flange edge, and its main function is to provide a connection basis. The second overlap 121 is usually set outward relative to the installation cavity 11a; the box cover 12 can only form the second overlap 121 at its side end in the second direction Y, and of course, the second overlap 121 can also be formed at its side end in the third direction Z, such as Fig.12 As shown, this embodiment does not limit this; "the second overlap 121 is connected to the box body 11", the box body 11 is usually also provided with an overlap structure corresponding to the second overlap 121, for example Figure 2 As shown in the figure, the connection method between the second overlap 121 and the box body 11 generally includes bolt connection, but is not limited thereto; it is worth mentioning that in the first direction X, the second overlap 121 of the box cover 12 generally belongs to the structure on the box cover 12 that is closer to the box body 11, that is, after the battery device 100 is installed on the power carrier, the second overlap 121 of the box cover 12 belongs to the structure on the box cover 12 that is lower in terrain.

[0118] According to the above technical solution, since the beam body 21 is located on the side of the box cover 12 away from the box body 11, the first overlap 2111 of the beam plate 211 is connected to the box body 11 through the overlap connection section 2111a. It can be determined that the overlap connection section 2111a is closer to the box body 11 in the first direction X than the rest of the first overlap 2111. A drainage section 2111c is arranged in the overlap connection section 2111a. When water accumulates in the cavity 2a of the beam body 21, the accumulated water can flow autonomously to the overlap connection section 2111a with a lower terrain, and be discharged outwardly through the drainage channel 2111d defined here, which can improve the drainage efficiency of the beam body and is conducive to draining the accumulated water.

[0119] In addition, a drainage section 2111c may be provided at other positions on the first overlap 2111 except the overlap connection section 2111a, for example Fig.11 As shown, the drainage section 2111c and the reinforcement section 2111b are arranged alternately.

[0120] See also Fig.12 In some embodiments, the drainage section 2111c is recessed away from the tank cover 12 relative to its peripheral area.

[0121] It should be noted that, in this embodiment, “the drainage section 2111c is recessed away from the box cover 12 relative to its peripheral area” means that the drainage sections 2111c on the overlap connection sections 2111a of the two first overlaps 2111 are recessed away from the box cover 12 relative to their peripheral areas. In this case, a drainage channel 2111d needs to be defined between the two drainage sections 2111c. It can be understood that the depression degrees of the two drainage sections 2111c are different. It is worth mentioning that the drainage section 2111c is only a part of the overlap connection section 2111a. The overlap connection section 2111a also includes a main body part except the drainage section 2111c, and is connected to the second overlap 121 of the box cover 12 through the main body part. Fig. 9 shown.

[0122] According to the above technical solution, by setting the drainage section 2111c in a form of being recessed away from the box cover 12 relative to its surrounding area, the drainage sections 2111c of the two first overlaps 2111 are arranged at intervals due to their own different degrees of recess so as to define the drainage channel 2111d, and the recessed setting of the drainage section 2111c is also beneficial to improving the structural strength of the first overlap 2111; not only that, the recessed setting of the drainage section 2111c away from the box cover 12 has little effect on the connection between the main part of the overlap connecting section 2111a and the second overlap 121 of the box cover 12.

[0123] See also Fig.16 and Fig.17 In some embodiments, a drainage hole 2114 is provided at a position of the second beam plate 211 b close to the box body 11 .

[0124] It should be noted that the drainage hole 2114 is arranged along the first direction X through the second beam plate 211b to connect the cavity 2a of the beam body 21 with the outside world. Regardless of whether the second beam plate 211b is arranged at a distance or in contact with the box cover 12, it is necessary to ensure that the drainage hole 2114 can be avoided so that the accumulated water can pass through the drainage hole 2114 smoothly; after the battery device 100 is installed on the power carrier, the position of the second beam plate 211b close to the box body 11 belongs to the lower position on the second beam plate 211b.

[0125] According to the above technical solution, since the second beam plate 211b is arranged closer to the box cover 12 than the first beam plate 211a, a drainage hole 2114 is arranged at a position of the second beam plate 211b close to the box body 11, which is conducive to the autonomous discharge of accumulated water in the cavity 2a through the drainage hole 2114, and can effectively prevent the inner wall of the cavity 2a from rusting due to long-term contact with accumulated water, thereby ensuring the service life of the mounting beam 2.

[0126] See also Figures 10 to 17In some embodiments, the second beam plate 211b is arranged in close contact with the box cover 12 and has a liquid collecting area 211c. The liquid collecting area 211c is recessed away from the box cover 12 relative to its surrounding area, and together with the box cover 12 defines a liquid collecting cavity, which extends to the side of the second beam plate 211b to form a cavity opening; the drainage hole 2114 is arranged in the liquid collecting area 211c.

[0127] It should be noted that, under the premise that the second beam 211b fits the box cover 12 and the drainage hole 2114 is set in the liquid collecting area 211c, the liquid collecting area 211c is recessed away from the box cover 12, which can define a liquid collecting cavity between the liquid collecting area 211c and the box cover 12, thereby preventing the drainage hole 2114 from being blocked; "the liquid collecting cavity extends to the side of the second beam 211b to form a cavity opening" can be understood as that the liquid collecting area 211c is adjacent to the side of the second beam 211b, so that an arched opening is formed on the side of the second beam 211b, and the arched opening is also the cavity opening of the liquid collecting cavity; this embodiment does not limit the specific shape of the liquid collecting area 211c, for example, the liquid collecting area 211c can be set as follows Fig.17 The cross-shaped structure shown in the figure has a liquid collecting area 211c which is intended to collect the accumulated water in the cavity 2a along the second direction Y through the liquid collecting cavity and discharge it along the third direction Z through the cavity opening.

[0128] According to the above technical scheme, by setting the second beam plate 211b in close contact with the box cover 12, it is helpful to reduce the size of the battery device 100 along the first direction X and reduce the risk of the bottom of the box body 11 encountering a collision. On this basis, the second beam plate 211b can define a liquid collecting cavity together with the box cover 12 through its liquid collecting area 211c, and the drainage hole 2114 is set in the liquid collecting area 211c, which can collect the accumulated water in the cavity 2a of the beam body 21 into the liquid collecting cavity, and the accumulated water can be discharged toward the side of the second beam plate 211b through the cavity opening of the liquid collecting cavity. This scheme utilizes the recessed setting of the liquid collecting area 211c away from the box cover 12, which can not only achieve the purpose of diverting drainage, but also improve the structural strength of the second beam plate 211b.

[0129] See also Figure 8 and Fig.10 In some embodiments, the box cover 12 has a first reinforcement area 12a and a second reinforcement area 12b that are connected to each other. The first reinforcement area 12a and the second reinforcement area 12b are recessed toward the box body 11 relative to their respective peripheral areas, and the second reinforcement area 12b extends to the side end of the box cover 12; the second beam plate 211b is accommodated in the first reinforcement area 12a, and the cavity opening of the liquid collecting cavity is arranged corresponding to the second reinforcement area 12b.

[0130] It should be noted that the first reinforced area 12a and the second reinforced area 12b are both local structures on the box cover 12 that are recessed toward the box body 11. Therefore, a corresponding groove structure can be formed on the side of the box cover 12 that is away from the box body 11. The groove structure corresponding to the first reinforced area 12a can accommodate the second beam plate 211b, and the groove structure corresponding to the second reinforced area 12b can be connected to the groove structure corresponding to the first reinforced area 12a, and extend through to the side end of the box cover 12; "the cavity opening of the liquid collecting chamber is arranged corresponding to the second reinforced area 12b" means that the groove structure corresponding to the second reinforced area 12b is connected to the groove structure corresponding to the first reinforced area 12a, and the notch position corresponds to the cavity opening of the liquid collecting chamber, so that the accumulated water discharged from the cavity opening of the liquid collecting chamber can flow into the groove structure corresponding to the second reinforced area 12b.

[0131] According to the above technical solution, since the first reinforcement area 12a and the second reinforcement area 12b are recessed toward the box body 11, the structural strength of the box body 11 can be improved, and the second beam plate 211b is accommodated in the first reinforcement area 12a, which can further reduce the distance between the beam body 21 and the box body 11 in the first direction X, that is, reduce the size of the battery device 100 along the first direction X. On this basis, since the second reinforcement area 12b is connected to the first reinforcement area 12a, the cavity opening of the liquid collecting chamber can directly discharge liquid to the second reinforcement area 12b, and the accumulated water can flow out to the side end of the box cover 12 under the guidance of the second reinforcement area 12b. This solution takes into account the improvement of the structural strength of the box cover 12, the reduction of the size of the battery device 100 along the first direction X, and the guidance of the external discharge of the accumulated water in the liquid collecting chamber.

[0132] See also Figure 5 and Figure 6 In some embodiments, the box body 11 includes a reinforcing beam 111 arranged in the installation cavity 11a; the box cover 12 is formed with a second through hole 122 corresponding to the reinforcing beam 111; the battery device 100 includes a connecting member 23, which extends along the first direction X, and one end of the connecting member 23 is connected to the reinforcing beam 111, and the other end extends out of the second through hole 122 and is connected to the beam body 21.

[0133] It should be noted that a reinforcing beam 111 is provided in the box body 11. The reinforcing beam 111 generally includes a transverse beam and a longitudinal beam. It is usually used to support the side walls of the box body 11 opposite to each other along the second direction and the side walls opposite to each other along the third direction, so as to improve the impact resistance and structural stability of the box body 11 structure. This embodiment will not be described in detail. The second through hole 122 formed on the box cover 12 corresponding to the reinforcing beam 111 passes through the first direction X. One end of the connecting member 23 is connected to the reinforcing beam 111, and the other end extends out of the second through hole 122 to be connected to the beam body 21. There are many possible ways to connect the connecting member 23 to the reinforcing beam 111, such as through a threaded structure or a snap-on connection. There are usually many possible ways to connect the connecting member 23 to the beam body 21, which can also be connected through a threaded structure or a snap-on connection. At the same time, the specific structure of the connecting member 23 is usually related to the specific connection method between the connecting member 23 and the reinforcing beam 111 and the beam body 21, which is not limited in this embodiment.

[0134] According to the above technical solution, through the setting of the connecting piece 23, the reinforcing beam 111 of the box body 11 and the beam body of the mounting beam 2 can be connected, which plays the role of indirectly connecting the mounting beam 2 and the box body 11, and provides more connection points between the mounting beam 2 and the box body 11, which can improve the connection strength between the two.

[0135] Please refer to Figure 3 In some embodiments, the beam body 21 is connected to the box body 11 at both ends along the second direction Y; a plurality of mounting members 22 are arranged along the second direction Y, and at least one connecting member 23 is arranged between two adjacent mounting members 22; wherein the first direction X and the second direction Y are arranged to intersect.

[0136] It should be noted that “at least one connecting member 23 is provided between two adjacent mounting members 22” means that only one connecting member 23 (such as Figure 3 As shown, the mounting member 22 and the connecting member 23 are arranged alternately in the second direction Y), two connecting members 23 may be provided, or even a plurality of connecting members 23 may be provided, which is based on the layout of the reinforcing beam 111 in the box body 11. For example, when the reinforcing beam 111 is extended along the second direction Y and arranged in the box body 11, and is opposite to the beam body 21 of the mounting beam 2 in the first direction X, the connecting member 23 can be provided at each position of the reinforcing beam 111 along the second direction Y to connect the beam body 21. When the reinforcing beam 111 is extended along the third direction Z and arranged in the box body 11, the reinforcing beam 111 intersects with the beam body 21 of the mounting beam 2 in the first direction X, and the connecting member 23 can be provided only at the intersection to connect the beam body 21. The specific number and position of the connecting member 23 are not limited in this embodiment.

[0137] According to the above technical solution, multiple mounting parts 22 are arranged on the beam body 21 to meet the special layout requirements of multiple mounting points for electric vehicles, and the two ends of the beam body 21 along the second direction Y and the multiple connecting parts 23 are all connection points between the mounting beam 2 and the box body 11. By arranging a connecting part 23 between two adjacent mounting parts 22, the larger suspended span between the two ends of the beam body 21 can be divided into multiple smaller suspended spans, thereby reducing the deformation of the beam body that may exist during mounting.

[0138] See also Figure 5 In some embodiments, the connecting member 23 includes a first connecting portion 231 , one end of the first connecting portion 231 is connected to the reinforcing beam 111 , and the other end thereof is in contact with the box cover 12 .

[0139] It should be noted that the first connecting portion 231 belongs to the portion of the connecting member 23 located in the installation cavity 11a, and the connecting member 23 certainly also includes a portion located outside the installation cavity 11a and connected to the beam body, which is not limited in this embodiment; the position where the first connecting portion 231 abuts against the box cover 12 may correspond to the second through hole 122, but is certainly not limited to this.

[0140] According to the above technical solution, the reinforcing beam 111 of the box body 11 can be connected by setting the first connecting portion 231. At the same time, the first connecting portion 231 can also abut the box cover 12, playing the role of supporting the middle part of the box cover 12 to prevent the larger extended surface on the box cover 12 from vibrating, thereby reducing the noise generated thereby.

[0141] See also Figure 6 In some embodiments, an annular sealing groove 2311 is provided at the end of the first connecting portion 231 corresponding to the second through hole 122 , and a sealing gasket 233 is accommodated in the annular sealing groove 2311 , and the sealing gasket 233 is sealed against the box cover 12 .

[0142] It should be noted that, in this embodiment, "the end of the first connecting portion 231" refers to the end of the first connecting portion 231 abutting against the box cover 12, and "an annular sealing groove 2311 is provided corresponding to the second through hole 122" means that the annular sealing groove 2311 is arranged around the second through hole 122. Specifically, the annular sealing groove 2311 can be set as a circular ring groove, a square ring groove, or even a polygonal ring groove. The specific structure of the annular sealing groove 2311 in this embodiment is not limited; the structure of the sealing gasket 233 is adapted to the annular sealing groove 2311, and also belongs to an annular structure; the material of the sealing gasket 233 is usually an elastic material, such as rubber material, so as to fill the gap between the end of the first connecting portion 231 and the box cover 12 through its own deformation to achieve an interference fit.

[0143] According to the above technical solution, an annular sealing groove 2311 is provided at the end of the first connecting portion 231 abutting against the box cover 12 corresponding to the second through hole 122, in which the sealing gasket 233 can be accommodated. Since the sealing gasket 233 can also be sealed against the box cover 12, the sealing of the box body 1 is ensured on the basis of the second through hole 122 being opened on the box cover 12.

[0144] See also Figure 5 In some embodiments, an inserting groove 111 a is provided on the end surface of the reinforcing beam 111 facing the box cover 12 ; and an end portion of the first connecting portion 231 is disposed in the inserting groove 111 a .

[0145] It should be noted that the plug-in slot 111a mentioned in the embodiment of the present application is only opened at one end of the reinforcing beam 111 facing the box cover 12, and does not pass through the bottom of the box body 11; the end of the first connecting part 231 is arranged in the plug-in slot 111a, and specifically, the first connecting part 231 and the reinforcing beam 111 can be connected in combination with a pin inserted from the side. Of course, the first connecting part 231 can also be clamped by setting a limiting clamping structure in the plug-in slot 111a, and this embodiment does not limit this.

[0146] According to the above technical solution, a plug-in groove 111a is opened on the reinforcing beam 111 for the end of the first connecting part 231 to be set, which can provide a larger contact area between the end of the first connecting part 231 and the reinforcing beam 111, thereby ensuring the connection strength between the first connecting part 231 and the reinforcing beam 111.

[0147] Please continue reading Figure 5 In some embodiments, the plugging slot 111a is provided with a notch 1111a; the first connecting portion 231 is welded to the side wall of the plugging slot 111a at the notch 1111a.

[0148] It should be noted that “the insertion slot 111a is provided with a notch 1111a” means that the side wall of the insertion slot 111a laterally penetrates the reinforcing beam 111, thereby forming the notch 1111a. Due to the existence of the notch 1111a, the end of the first connecting portion 231 extending into the insertion slot 111a can be exposed to the side of the reinforcing beam 111, such as Figure 5 As shown in the figure, notches 1111a are formed on both sides of the plug-in slot 111a, thereby exposing the first connecting portion 231 laterally, thereby obtaining four welding points shown in circles in the figure.

[0149] According to the above technical solution, due to the existence of the notch 1111a, the connection position between the plug-in slot 111a and the first connection part 231 can be exposed on the side of the reinforcing beam 111, and the side wall of the plug-in slot 111a and the first connection part 231 are connected at the notch 1111a by welding, so that more welding points can be obtained, thereby further improving the connection strength between the first connection part 231 and the reinforcing beam 111.

[0150] Please continue reading Figure 5 In some embodiments, one end of the first connection portion 231 welded to the side wall of the insertion slot 111 a is hollow.

[0151] It should be noted that “the end of the first connection part 231 welded to the side wall of the plug-in slot 111a is hollow” means that a weight-reducing cavity is provided inside the first connection part 231 at one end of the plug-in slot 111a, and only a certain wall thickness is retained to ensure the connection strength.

[0152] According to the above technical solution, one end of the first connection part 231 welded to the side wall of the insertion slot 111a is hollow, which is conducive to welding through the first connection part 231 and improving the welding quality of the welding point. Moreover, the hollow setting of the first connection part 231 can also reduce the weight of the first connection part 231, thereby meeting the lightweight design requirements of the battery device 100.

[0153] See also Figure 6 and Fig.19 In some embodiments, the beam body 21 is arranged to abut the box cover 12, and a third through hole 2113 is provided corresponding to the second through hole 122; the connecting member 23 includes a second connecting portion 232, and the second connecting portion 232 has a first end and a second end located in the first direction X, the first end is located on the side of the beam body 21 away from the box cover 12, and abuts against the beam body 21, and the second end extends from the third through hole 2113 and the second through hole 122, and is connected to the first connecting portion 231.

[0154] It should be noted that the beam body 21 is provided with a third through hole 2113 corresponding to the second through hole 122, and the second through hole 122 and the third through hole 2113 are opposite to each other in the first direction X, so as to form a channel, and the channel is used for the second end of the second connection part 232 to pass through; the second connection part 232 belongs to another part of the connecting member 23 connected to the first connection part 231, and there are many possible connection methods between the second connection part 232 and the first connection part 231, such as a snap connection and a latch connection. The present embodiment does not limit the specific connection method between the first connection part 231 and the second connection part 232; the first end of the second connection part 232 is located on the side of the beam body 21 away from the box cover 12, and abuts against the beam body 21. Therefore, compared with the second end, the radial dimension of the first end of the second connection part 232 is larger, and is at least larger than the aperture of the third through hole 2113, so that the first end of the second connection part 232 can abut against the beam body 21.

[0155] According to the above technical scheme, since the first connecting part 231 abuts against the box cover 12 in the installation cavity 11a of the box body 1, combined with the beam body 21 abutting against the box cover 12, and the first end of the second connecting part 232 abutting against the beam body 21, it is achieved that the box cover 12 and the beam body 21 are clamped and fixed from both sides by the first connecting part 231 and the second connecting part 232 respectively, thereby achieving a fixed connection between the connecting member 23 and the beam body. Not only that, this scheme also achieves relative fixation between the beam body and the box cover 12, thereby improving the stiffness and mode of the box cover 12.

[0156] See also Figure 8 and Fig.12 In some embodiments, the box cover 12 has a third reinforcement area 12 c disposed adjacent to the second through hole 122 , and the third reinforcement area 12 c is recessed toward or away from the box body 11 relative to its peripheral area.

[0157] It should be noted that the third reinforced area 12c is a local recessed structure of the box cover 12, which can enhance the structural strength of the box cover 12. This embodiment does not limit the specific recessed direction of the third reinforced area 12c relative to its surrounding area.

[0158] According to the above technical solution, since the connecting piece 23 connects the box cover 12 and the beam body through the second through hole 122, during the mounting process of the mounting beam 2, the box cover 12 may be subjected to stress at the second through hole 122. By setting a third reinforcement area 12c at a position of the box cover 12 adjacent to the second through hole 122 and the recessed setting of the third reinforcement area 12c, the structural strength of the box cover 12 can be increased.

[0159] See also Figure 6In some embodiments, a second threaded hole 2312 is provided at one end of the first connection portion 231 that abuts against the box cover 12 ; the second connection portion 232 is provided with a stud 2322 that passes through the second through hole 122 , and the stud 2322 is connected to the second threaded hole 2312 .

[0160] It should be noted that the first connecting part 231 in this embodiment can be set as a connecting bolt; since the second threaded hole 2312 is located in the first connecting part 231, in order to avoid water accumulation in the second threaded hole 2312 and cause rust on the thread, sealant can be applied at the threaded connection between the stud 2322 and the second threaded hole 2312.

[0161] According to the above technical solution, the first connection part 231 and the second connection part 232 are connected via the stud 2322 and the second threaded hole 2312. This threaded connection has high connection strength, simple structure and easy operation.

[0162] Please continue reading Figure 6 In some embodiments, the beam body 21 includes a first beam plate 211a and a second beam plate 211b that are opposite and connected along a first direction, the second beam plate 211b abuts the box cover 12, the first beam plate 211a and the second beam plate 211b are respectively provided with third through holes 2113 corresponding to the second through holes 122, and a support portion 24 is provided between the first beam plate 211a and the second beam plate 211b; a holding protrusion 2323 is provided on the peripheral side of the first end of the second connecting portion 232 corresponding to the support portion 24, and the holding protrusion 2323 abuts the first beam plate 211a.

[0163] It should be noted that the first beam plate 211a and the second beam plate 211b are opposite to each other in the first direction, and the second beam plate 211b abuts against the box cover 12. It is not difficult to understand that the first beam plate 211a is arranged farther away from the box cover 12 than the second beam plate 211b; the first beam plate 211a and the second beam plate 211b are respectively provided with third through holes 2113 corresponding to the second through holes 122, and the second through holes 122 and the two third through holes 2113 are opposite to each other in the first direction X, so as to form a channel for the second end of the second connecting portion 232 to pass through; the first beam plate 211a and the second beam plate 211b are respectively provided with third through holes 2113 corresponding to the second through holes 122, and the second through holes 122 and the two third through holes 2113 are opposite to each other in the first direction X, so as to form a channel for the second end of the second connecting portion 232 to pass through; A support portion 24 is provided between the plate 211a and the second beam plate 211b, and a holding protrusion 2323 is provided on the peripheral side of the first end of the second connecting portion 232 corresponding to the support portion 24. The holding protrusion 2323 abuts against the first beam plate 211a to apply a clamping pressure thereto. The clamping pressure passes through the first beam plate 211a, the support portion 24, the second beam plate 211b, and the box cover 12 in the first direction X in sequence, and is finally transmitted to the first connecting portion 231. In this embodiment, the holding protrusion 2323 can be a convex block structure facing the second direction Y or the third direction Z, or can be Figure 6 The ring structure shown in FIG. 1 is not limited to this embodiment.

[0164] According to the above technical solution, the purpose of reducing the weight of the beam body is achieved by arranging the first beam plate 211a and the second beam plate 211b at intervals in the first direction X. On this basis, since the first beam plate 211a and the second beam plate 211b need to bear the abutting forces from the second connection part 232 and the first connection part 231 respectively, a support part 24 is provided between the first beam plate 211a and the second beam plate 211b by providing a holding protrusion 2323 corresponding to the peripheral side of the second connection part 232. The support part 24 can bear the abutting force to improve the rigidity of the beam body.

[0165] Please refer to Fig.19 In some embodiments, the support portion 24 includes a through hole nest 241 , both ends of which are fixedly connected to the first beam plate 211 a and the second beam plate 211 b , respectively, and the through hole 2411 of the through hole nest 241 is arranged corresponding to the second via hole 122 .

[0166] It should be noted that, in the present embodiment, the two ends of the through hole nesting 241 along the first direction X (i.e., the two ends along its axial direction) are fixedly connected to the first beam plate 211a and the second beam plate 211b respectively, and the through hole 2411 of the through hole nesting 241 is arranged corresponding to the second via hole 122 in the first direction X. There is no necessary size relationship between the through hole 2411 of the through hole nesting 241 and the aperture of the second via hole 122, as long as the second end of the second connecting portion 232 can pass through.

[0167] According to the above technical solution, by setting the through hole nesting 241, support can be provided for the first beam plate 211a and the second beam plate 211b at various positions around the second through hole 122, further improving the rigidity of the beam body.

[0168] See also Figure 6 In some embodiments, a second connection portion 232 is provided at one end of the connection member 23 away from the reinforcing beam 111, and a third threaded hole 2321 is provided on the second connection portion 232 along the first direction X. The third threaded hole 2321 is used for connection with a mounting bolt 410 of an electric carrier.

[0169] It should be noted that in the battery device 100 provided in this embodiment, the mounting point on the reinforcing beam 111 of the box body 11 can correspond to the mounting point position of part of the power carrier, so that the second connecting portion 232 of the connecting member 23 can be connected to the mounting bolt 410 of the power carrier through its own third threaded hole 2321.

[0170] According to the above technical solution, while the connecting member 23 connects the mounting beam 2 and the reinforcing beam 111, it can also be connected to the mounting bolt 410 of the corresponding model of the power carrier through the third threaded hole 2321 on its second connecting portion 232, which is equivalent to playing a mounting role, thereby improving the mounting firmness between the battery device 100 and the power carrier.

[0171] See also Figure 2 and Fig.12 In some embodiments, the box body 11 includes a frame 112 and a bottom plate 113, the bottom plate 113 is arranged on one side of the frame, and the box cover 12 is arranged on the other side of the frame 112; the beam body 21 has two connecting ends 212 at both ends of the second direction Y, and the two connecting ends 212 are respectively connected to the two ends of the frame 112 along the second direction Y; wherein the first direction X and the second direction Y are arranged to intersect.

[0172] It should be noted that, for most battery devices 100, the box body 11 generally includes a bottom plate 113 and a frame 112. The frame 112 surrounds and forms the above-mentioned installation cavity 11a. The installation cavity 11a is open on both sides of the frame 112 (for example, on both sides of the frame 112 along the first direction X). The bottom plate 113 is provided on one side of the frame 112 to support the battery cell 3. The box cover 12 is provided on the other side of the frame 112 to cover the installation cavity 11a. The frame 112 and the bottom plate 113 have various structural forms. For example, when the box body 11 When it is a stamped box body, the frame 112 and the bottom plate 113 include a stamped thin-wall structure. When the box body 11 is a profile box body, the frame 112 and the bottom plate 113 include a profile structure, which is not limited to the embodiments of the present application. In box bodies 11 of some structural types, the frame 112 usually includes two expansion beams that are opposite to each other in the second direction Y, and two side beams that are opposite to each other in the third direction. For this frame 112 structure, the connecting end 212 of the beam body 21 can be connected to the expansion beam, and of course, it can also be connected to the side beam, which is not limited to the embodiments of the present application.

[0173] The "connecting end 212" refers to the end of the beam body 21 located in the second direction Y for connecting to the box body 11. The specific structural form of the connecting end 212 can be various. For example, when a first overlap 2111 is formed on the periphery of the beam body 21 along the first direction X, the connecting end 212 can include an overlap connecting section 2111a on the first overlap 2111 located in the second direction Y. This embodiment is not limited to this.

[0174] According to the above technical solution, the frame 112 of the box body 11 usually has a high structural strength, and the two connecting ends 212 of the beam body 21 are respectively connected to the two ends of the frame 112 along the second direction Y, thereby improving the connection reliability between the beam body 21 and the box body 11. Moreover, the connection method of the connecting end 212 of the beam body 21 and the frame 112 has little effect on the box cover 12, thereby ensuring the sealing effect of the box body 1; moreover, since the beam body 21 is connected to the frame 112 at both ends of the second direction Y, it can ensure that the center of gravity of the box body 1 is within the span of the beam body 21 along the second direction Y, thereby improving the stability of the battery device 100 when mounted on the power carrier.

[0175] See also Fig.12 In some embodiments, the box cover 12 is provided with second overlaps 121 at both ends in the second direction Y, and the two second overlaps 121 are respectively connected to the surrounding frame 112; the two connecting ends 212 are respectively connected to the corresponding second overlaps 121.

[0176] The above embodiment has explained the second overlap 121 , which will not be described in detail in this embodiment.

[0177] According to the above technical solution, the box cover 12 is connected to the frame 112 of the box body 11 through the second overlap 121, which can increase the contact area between the two, thereby improving the connection strength and ensuring the sealing performance of the box body 1. On this basis, the connection end 212 of the beam body 21 is indirectly connected to the frame 112 through the second overlap 121, which can also ensure that the gravity of the box body 11 is transmitted to the beam body 21 along the first direction X. This connection method allows the beam body 21 to be pre-arranged on the box cover 12, and finally the gravity transfer from the box body 11 to the beam body 21 is realized through the connection between the box cover 12 and the box body 11. This solution can improve the assembly efficiency of the battery device 100 by pre-connecting the beam body 21 with the box cover 12.

[0178] See also Fig. 9 In some embodiments, the connection end portion 212 is welded to the corresponding second overlap 121 ; and / or, the connection end portion 212 and the corresponding second overlap 121 are connected to the surrounding frame 112 via bolts.

[0179] It should be noted that the above two parallel technical features "the connecting end 212 is welded to the corresponding second overlap 121" and "the connecting end 212 and the corresponding second overlap 121 are connected to the box body 11 by bolts" can be set either one or at the same time. Obviously, the effect of setting them at the same time is better.

[0180] According to the above technical scheme, welding is used as an integrated connection method, and the requirements for the structural environment of the connection point are relatively low. As long as there is a sufficient contact area between the two connection points, the connection end 212 of the beam body 21 is welded to the corresponding second overlap 121. The connection method is direct and simple, which can ensure the firmness of the connection between the connection end 212 and the second overlap 121, and has little impact on the main part of the middle part of the box cover 12; based on the fact that bolts are mostly used between the box cover 12 and the box body 11, the second overlap 121 and the connection end 212 can be connected as a whole to the frame 112 of the box body 11 by bolt connection in this scheme, without adding additional connection structure to the box body 1.

[0181] The present application also proposes an electric vehicle, which includes a battery device 100, and the battery device 100 is used to provide electric energy. The specific structure of the battery device 100 refers to the above embodiment. Since the electric vehicle adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery device 100 is used to provide electric energy to the electric vehicle, which includes but is not limited to new energy vehicles such as pure electric vehicles, hybrid vehicles and extended-range vehicles, as well as engineering vehicles such as electric excavators and electric bulldozers, and can also include aircraft such as electric drones and electric passenger aircraft.

[0182] The present application proposes a battery device 100, which includes a box body 1 and a mounting beam 2. The box body 1 includes a box body 11 and a box cover 12. The box cover 12 is arranged on one side of the box body 11 along a first direction X. The box cover 12 and the box body 11 jointly define an installation cavity 11a. A battery cell 3 and a reinforcing beam 111 are arranged in the installation cavity 11a. An insertion groove 111a is formed at one end of the reinforcing beam 111 facing the box cover 12. A notch 1111a is formed on the side wall of the insertion groove 111a. The box cover 12 is provided with a second overlap at both ends in the second direction Y. 121, the second overlap 121 is connected to the box body 11, and the box cover 12 is also formed with a second through hole 122, a first reinforcement area 12a, a second reinforcement area 12b, and a third reinforcement area 12c. The first reinforcement area 12a is connected to the second reinforcement area 12b, and the first reinforcement area 12a and the second reinforcement area 12b are recessed relative to their peripheral areas toward the box body 11, the second reinforcement area 12b extends to the side end of the box cover 12, and the third reinforcement area 12c is arranged adjacent to the second through hole 122, and is recessed relative to its peripheral area toward or away from the box body 11; mounting beam 2 includes a beam body 21 and a nut nesting 221, the beam body 21 is located on the side of the box cover 12 away from the box body 11 along the first direction X, the beam body 21 includes two beam plates 211 that are opposite and connected along the first direction X, and the two beam plates 211 are respectively formed with third through holes 2113, the two beam plates 211 include a first beam plate 211a, and a second beam plate 211b located on the side of the first beam plate 211a facing the box cover 12, the first beam plate 211a is provided with a first through hole 2112, and the peripheries of the two beam plates 211 are respectively provided with first overlaps 2111, and the two The first overlap 2111 is fixedly connected, and a cavity 2a is defined between the two beam plates 211. A nut nest 221 is provided in the cavity 2a corresponding to the first through hole 2112. One end of the nut nest 221 extends out of the first through hole 2112. The first threaded hole 2211 of the nut nest 221 is used for connection with the mounting bolt 410 of the electric vehicle. An annular protrusion 222 is also formed on the peripheral side of the nut nest 221. The annular protrusion 222 corresponds to the peripheral edge of the first through hole 2112 and is fixedly connected to the first beam plate 211a on the side close to the second beam plate 211b.The first lap 2111 has a plurality of reinforcing sections 2111b arranged along the circumference of the beam plate 211, and the reinforcing sections 2111b are recessed relative to the peripheral area thereof toward or away from the box body 11. The first lap 2111 has two lap connection sections 2111a at both ends of the second direction Y, and the two lap connection sections 2111a are respectively connected to the two second laps 121 of the box cover 12, and are connected to the box body 11 together through bolts. The second beam plate 211b abuts against the box cover 12, and is accommodated in the first reinforcing section 2111b of the box cover 12. The second beam plate 211b has a liquid collecting area 211c, which is recessed relative to its surrounding area away from the box cover 12 and defines a liquid collecting cavity together with the box cover 12. The liquid collecting cavity extends to the side of the second beam plate 211b to form a cavity opening, and the cavity opening is arranged corresponding to the second reinforcement area 12b of the box cover 12. The liquid collecting area 211c is also formed with a drainage hole 2114 connecting the cavity 2a and the liquid collecting cavity; the battery device 100 also includes a connector 23, which includes a connector 23 connected to each other along the first direction X. The first connection part 231 and the second connection part 232 are threadedly connected, the end of the first connection part 231 is arranged in the insertion groove 111a of the reinforcing beam 111, and is welded and connected to the side wall of the insertion groove 111a at the notch 1111a, the end of the first connection part 231 connected to the second connection part 232 is abutted against the box cover 12, and an annular sealing groove 2311 is formed corresponding to the second through hole 122, and a sealing gasket 233 is arranged in the annular sealing groove 2311, and the sealing gasket 233 is sealed against the box cover 12, and the second connection part 2 32 passes through the second through hole 122 of the box cover 12 and the third through hole 2113 on the two beam plates 211. A holding protrusion 2323 is formed on the peripheral side of one end of the second connecting portion 232 away from the first connecting portion 231. The holding protrusion 2323 is located on the side of the first beam plate 211a away from the second beam plate 211b and abuts against the first beam plate 211a. A through hole nesting 241 is provided in the cavity 2a of the beam body 21 corresponding to the holding protrusion 2323. The through hole 2411 of the through hole nesting 241 corresponds to the third through hole 2113. ;

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body, comprising a box body and a box cover, wherein the box cover is arranged on one side of the box body along a first direction, and the box cover and the box body together define an installation cavity, in which a battery cell is arranged; and The mounting beam comprises a beam body and a mounting component. The beam body is arranged on the side of the box cover away from the box body along the first direction and connected to the box body. The mounting component is arranged in the middle of the beam body and is located on the side of the box cover away from the box body. The mounting component is used to be mounted on an electrical carrier.

2. The battery device according to claim 1, characterized in that The beam body includes two beam plates that are opposite and connected along a first direction, the two beam plates include a first beam plate and a second beam plate, the first beam plate is arranged away from the box cover relative to the second beam plate, and a first through hole is arranged on the first beam plate; The mounting member is arranged corresponding to the first through hole, and is at least partially fixedly arranged between the first beam plate and the second beam plate.

3. The battery device according to claim 2, characterized in that: The mounting component includes a nut nest, and the nut nest has a first threaded hole, and the first threaded hole is used for connection with a mounting bolt of an electric carrier.

4. The battery device according to claim 3, characterized in that: The nut is nested and extends out of the first through hole along the first direction.

5. The battery device according to claim 3, characterized in that: An annular protrusion is formed on the peripheral side of the end of the nut nesting away from the box cover. The annular protrusion corresponds to the peripheral edge of the first through hole and is fixedly connected to a side of the first beam plate close to the second beam plate.

6. The battery device according to claim 2, characterized in that: The peripheries of the two beams and plates are fixedly connected and define a cavity therebetween; The mounting component is at least partially disposed in the cavity.

7. The battery device according to claim 6, characterized in that: A first overlap is provided on the periphery of each beam plate, and the first overlaps of the two beam plates are fixedly connected.

8. The battery device according to claim 7, characterized in that: In the circumferential direction of the beam plate, the first overlapped edge is formed with a plurality of reinforcement sections, and the reinforcement sections are recessed relative to the peripheral area thereof and are arranged toward or away from the box cover.

9. The battery device according to claim 7, characterized in that: In the circumferential direction of the beam plate, the first overlap has a drainage section; The drainage sections of the two first overlapping edges are at least partially spaced apart and define a drainage channel, wherein the drainage channel is connected to the cavity.

10. The battery device according to claim 9, characterized in that The box cover has a second overlapped edge at a side end in a second direction, and the second overlapped edge is connected to the box body; The first overlap has an overlap connection section at the side end in the second direction, the first overlap is connected to the second overlap, and the drainage section is located in the overlap connection section; Wherein, the first direction and the second direction are arranged to intersect.

11. The battery device according to claim 10, characterized in that: The liquid discharge section is arranged to be recessed relative to its peripheral area and away from the box cover.

12. The battery device according to claim 6, characterized in that: The second beam plate is provided with a drainage hole at a position close to the box body.

13. The battery device according to claim 12, characterized in that: The second beam plate is arranged in close contact with the box cover and has a liquid collecting area. The liquid collecting area is arranged concavely away from the box cover relative to its peripheral area and defines a liquid collecting cavity together with the box cover. The liquid collecting cavity extends to the side of the second beam plate to form a cavity opening. The drainage hole is arranged in the liquid collecting area.

14. The battery device according to claim 13, characterized in that: The box cover has a first reinforcement area and a second reinforcement area connected to each other, the first reinforcement area and the second reinforcement area are recessed relative to their respective peripheral areas toward the box body, and the second reinforcement area extends to the side end of the box cover; The second beam plate is accommodated in the first reinforcement area, and the cavity opening of the liquid collecting cavity is arranged corresponding to the second reinforcement area.

15. The battery device according to any one of claims 1 to 14, characterized in that: The box body includes a reinforcing beam disposed in the mounting cavity; The box cover is formed with a second through hole corresponding to the reinforcing beam; The battery device includes a connecting member extending along the first direction, with one end of the connecting member connected to the reinforcing beam and the other end extending out of the second via hole and connected to the beam body.

16. The battery device according to claim 15, characterized in that Both ends of the beam body along the second direction are connected to the box body; A plurality of the mounting members are arranged along the second direction, and at least one connecting member is provided between two adjacent mounting members; Wherein, the first direction and the second direction are arranged to intersect.

17. The battery device according to claim 15, characterized in that: The connecting member includes a first connecting portion, one end of which is connected to the reinforcing beam, and the other end of which is in contact with the box cover.

18. The battery device according to claim 17, characterized in that: An annular sealing groove is formed at the end of the first connecting portion corresponding to the second through hole, a sealing gasket is contained in the annular sealing groove, and the sealing gasket is sealed and abutted against the box cover.

19. The battery device according to claim 17, characterized in that: The end surface of the reinforcing beam facing the box cover is provided with a plug-in groove; The end of the first connecting portion is arranged in the plug-in slot.

20. The battery device according to claim 19, characterized in that The plug-in slot is provided with a notch; the first connecting portion is welded to the side wall of the plug-in slot at the notch.

21. The battery device according to claim 20, characterized in that One end of the first connecting portion welded to the side wall of the inserting slot is hollow.

22. The battery device according to claim 17, wherein: The beam body is disposed against the box cover and is provided with a third through hole corresponding to the second through hole; The connecting member includes a second connecting portion, which has a first end and a second end located in the first direction, the first end is located on the side of the beam body away from the box cover and abuts against the beam body, and the second end extends from the third through hole and the second through hole and is connected to the first connecting portion.

23. The battery device according to claim 22, characterized in that The box cover has a third reinforcement area disposed adjacent to the second through hole, and the third reinforcement area is recessed relative to its peripheral area toward or away from the box body.

24. The battery device according to claim 22, characterized in that: A second threaded hole is provided at one end of the first connecting portion abutting against the box cover; The second connection portion is provided with a stud penetrating through the second through hole, and the stud is connected to the second threaded hole.

25. The battery device according to claim 22, characterized in that The beam body comprises a first beam plate and a second beam plate which are opposite and connected along a first direction, the second beam plate abuts against the box cover, the first beam plate and the second beam plate are respectively provided with third through holes corresponding to the second through holes, and a support portion is provided between the first beam plate and the second beam plate; A pressing protrusion is provided on the peripheral side of the first end of the second connecting portion corresponding to the supporting portion, and the pressing protrusion abuts against the first beam plate.

26. The battery device according to claim 25, characterized in that The support portion includes a through hole nest, two ends of the through hole nest are respectively fixedly connected to the first beam plate and the second beam plate, and the through hole of the through hole nest is arranged corresponding to the second through hole.

27. The battery device according to claim 15, characterized in that: A second connection portion is disposed at one end of the connection member away from the reinforcing beam, and a third threaded hole is disposed on the second connection portion along the first direction, and the third threaded hole is used for connection with a mounting bolt of an electric carrier.

28. The battery device according to any one of claims 1 to 14, characterized in that: The box body includes a surrounding frame and a bottom plate, wherein the bottom plate is arranged on one side of the surrounding frame, and the box cover is arranged on the other side of the surrounding frame; The beam body has two connecting ends at two ends of the second direction, and the two connecting ends are respectively connected to two ends of the surrounding frame along the second direction; Wherein, the first direction and the second direction are arranged to intersect.

29. The battery device according to claim 28, characterized in that The two ends of the box cover in the second direction are respectively provided with second overlaps, and the two second overlaps are respectively connected to the surrounding frame; The two connecting ends are respectively connected to the corresponding second overlapping edges.

30. The battery device according to claim 29, characterized in that The connecting end is welded to the corresponding second overlap; and / or, The connecting end and the corresponding second overlap are connected to the surrounding frame by bolts.

31. An electric vehicle, characterized in that: Comprising a battery device as claimed in any one of claims 1 to 30.

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