Battery device and electric vehicle

Abstract

The present application discloses a battery device and an electric vehicle, which relates to the field of battery technology, wherein the battery device includes a box body and a mounting beam, the box body includes a box body and a box cover, the box cover is arranged on one side of the box body along the first direction, the box cover and the box body jointly define an installation cavity, and a battery cell is arranged in the installation cavity; the mounting beam includes a beam body and a mounting member, the beam body is arranged on the side of the box cover away from the box body along the first direction, and is connected to the box body, the mounting member is arranged in the middle of the beam body, and is located on the side of the box cover away from the box body, and the mounting member is used to be mounted on the electric vehicle. In the technical solution provided by the present application, the box body of the battery device is indirectly connected to the electric vehicle by means of an external mounting beam, and by replacing mounting beams of different shapes or adjusting the connection position of the mounting beam and the box body, the mounting member on the mounting beam can be aligned and connected to the mounting position of the electric vehicle, thereby increasing the middle mounting adaptation range of the box body of the battery device.

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:

[0005] 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

[0006] 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.

[0007] 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.

[0008] 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;

[0009] 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.

[0010] Among them, at least part of the mounting member is fixedly arranged between the two beam plates, which is equivalent to embedding at least part of the mounting member into the beam body. On the one hand, it can increase the connection area between the mounting member 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 member for mounting connection along the first direction coincide with the beam body, so as to control the overall dimension of the mounting beam along the first direction, ensure that the box cover is as close as possible to the electric vehicle, and thus reduce the risk of the bottom of the box body being collided. Moreover, the form in which the two beam plates are arranged opposite to each other, combined with the connection and fixation of the mounting member to the two beam plates, can not only ensure the overall mounting strength of the mounting beam, but also play a role in weight reduction, meeting the lightweight design requirements of the battery device.

[0011] In some embodiments, the mounting member includes a nut nest, and the nut nest has a first threaded hole for connecting the mounting bolt of the electric vehicle.

[0012] Among them, the mounting member is connected to the mounting bolt of the electric vehicle through the nut nest, and the connection method through the thread pair enables the mounting member to bear a large tensile stress load, ensuring a firm connection.

[0013] In some embodiments, the nut nest extends out of the first through hole along the first direction.

[0014] Among them, the nut nest extends out of the through hole, so that the first threaded hole on the nut nest has a longer connection length, ensuring a larger connection contact area between the mounting bolt and the first threaded hole, and further improving the connection firmness between the nut nest and the mounting bolt.

[0015] In some embodiments, an annular protrusion is formed on the circumferential side of the end of the nut nest far from the box cover. The annular protrusion corresponds to the peripheral edge of the first through hole and is fixedly connected to the side of the first beam plate close to the second beam plate.

[0016] Among them, by providing an annular protrusion on the circumferential side of the nut nest and fixedly connecting the annular protrusion corresponding to the peripheral edge of 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, improving 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 on the first beam plate and the second beam plate, thus ensuring the stiffness of the beam body.

[0017] In some embodiments, the peripheral edges of the two beam plates are fixedly connected and jointly define a cavity therebetween;

[0018] At least part of the mounting member is arranged in the cavity.

[0019] Wherein, the peripheries of the two beam plates are fixedly connected, and a cavity is defined therebetween, that is, the two beam plates are connected to form a hollow shell structure, and the existence of the hollow shell structure can further improve the mounting capacity of the beam main body.

[0020] In some embodiments, a first overlapping edge is provided at the periphery of each of the beam plates, and the first overlapping edges of the two beam plates are fixedly connected.

[0021] Wherein, in the form of fixedly connecting through the two first overlapping edges, the connection area between the two beam plates can be increased, that is, the connection strength between the two beam plates is improved, and during the connection process, the two first overlapping edges can be stably stacked, which is beneficial to maintaining the relative position, thereby reducing the connection difficulty.

[0022] In some embodiments, in the circumferential direction of the beam plate, the first overlapping edge is formed with a plurality of strengthening sections, and the strengthening sections are recessed relative to their peripheral regions towards or away from the box cover.

[0023] Wherein, by machining a plurality of strengthening sections on the first overlapping edge, since the strengthening sections are recessed relative to their peripheral regions, the connection area between the two first overlapping edges is increased, and the connection strength between the two beam plates can be further improved.

[0024] In some embodiments, in the circumferential direction of the beam plate, the first overlapping edge has a liquid drainage section;

[0025] The liquid drainage sections of the two first overlapping edges are at least partially spaced apart from each other and define a liquid drainage channel, and the liquid drainage channel communicates with the cavity.

[0026] Wherein, the two beam plates are at least partially spaced apart at the liquid drainage sections of the first overlapping edges, so as to define a liquid drainage channel communicating with the cavity. When the electric vehicle wades through water and causes water to accumulate in the cavity of the beam main body, the accumulated water can be discharged through the liquid drainage channel, which can effectively prevent the inner wall of the cavity from rusting due to long-term contact with the accumulated water, and ensure the service life of the mounting beam.

[0027] In some embodiments, the box cover has a second overlapping edge at the side end in the second direction, and the second overlapping edge is connected to the box body;

[0028] The first overlapping edge has an overlapping edge connection section at the side end in the second direction, the first overlapping edge is connected to the second overlapping edge, and the liquid drainage section is located at the overlapping edge connection section;

[0029] Wherein, the first direction intersects with the second direction.

[0030] Among them, since the beam body is 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 drain section is arranged in the overlap connection section. When there is accumulated water in the cavity of the beam body, the accumulated water can flow autonomously to the overlap connection section with a lower terrain and be discharged outward through the drain channel defined here, which can improve the drainage efficiency of the beam body and is conducive to emptying the accumulated water.

[0031] In some embodiments, the drain section is recessed relative to its surrounding area away from the box cover.

[0032] Among them, by setting the drain section to be recessed relative to its surrounding area away from the box cover, the drain sections of the two first overlaps are arranged at intervals through their different degrees of depression, so as to define a drain channel. Moreover, the form of the recessed drain section is also conducive to improving the structural strength of the first overlap.

[0033] In some embodiments, a drain hole is provided at a position where the second beam plate is close to the box body.

[0034] Among them, since the second beam plate is arranged closer to the box cover than the first beam plate, setting a drain hole at a position where the second beam plate is close to the box body is conducive to the accumulated water in the cavity being discharged outward autonomously through the drain hole, which can effectively prevent the inner wall of the cavity from rusting due to long-term contact with the accumulated water and ensure the service life of the mounting beam.

[0035] In some embodiments, the second beam plate is attached to the box cover and has a liquid collection area. The liquid collection area is recessed relative to its surrounding area away from the box cover and jointly defines a liquid collection cavity with the box cover. A cavity opening is formed where the liquid collection cavity extends to the side of the second beam plate;

[0036] The drain hole is arranged in the liquid collection area.

[0037] Among them, by attaching the second beam plate to the box cover, it is conducive to reducing the size of the battery device in the first direction and reducing the risk of the bottom of the box body being collided. On this basis, the second beam plate can jointly define a liquid collection cavity with the box cover through its liquid collection area, and the drain hole is arranged in the liquid collection area, which can collect the accumulated water in the cavity of the beam body into the liquid collection cavity. The accumulated water can be discharged toward the side of the second beam plate through the cavity opening of the liquid collection cavity. This solution uses the recessed setting of the liquid collection area away from the box cover, which can not only serve the purpose of redirecting drainage but also play a role in improving the structural strength of the second beam plate.

[0038] In some embodiments, the lid has a first reinforcing region and a second reinforcing region connected to each other. The first reinforcing region and the second reinforcing region are recessed toward the box body relative to their respective peripheral regions, and the second reinforcing region extends to the side end of the lid;

[0039] The second beam plate is accommodated in the first reinforcing region, and the cavity opening of the liquid collection cavity is correspondingly arranged in the second reinforcing region.

[0040] Among them, since the first reinforcing region and the second reinforcing region are recessed toward the box body, the structural strength of the box body can be improved. And accommodating the second beam plate in the first reinforcing region 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 in the first direction. On this basis, since the second reinforcing region is connected to the first reinforcing region, the cavity opening of the liquid collection cavity can directly drain liquid to the second reinforcing region, and the accumulated water can flow out to the side end of the lid under the guidance of the second reinforcing region. This solution takes into account the improvement of the structural strength of the lid, the reduction of the size of the battery device in the first direction, and the drainage guidance of the accumulated water in the liquid collection cavity.

[0041] In some embodiments, the box body includes a reinforcing beam disposed in the installation cavity;

[0042] The lid is correspondingly formed with a second through hole for the reinforcing beam;

[0043] The battery device includes a connecting member that extends in the first direction, and one end is connected to the reinforcing beam and the other end extends out of the second through hole and is connected to the beam body.

[0044] Among them, through the arrangement of the connecting member, the reinforcing beam of the box body and the beam body of the mounting beam can be connected, which plays an indirect role in connecting the mounting beam and the box body, provides more connection points between the mounting beam and the box body, and can improve the connection strength between the two.

[0045] In some embodiments, both ends of the beam body in the second direction are connected to the box body;

[0046] A plurality of the mounting members are arranged in the second direction, and at least one of the connecting members is disposed between two adjacent mounting members;

[0047] Among them, the first direction and the second direction intersect.

[0048] Among them, setting a plurality of mounting members on the beam body can meet the special layout requirements of multiple mounting points of the corresponding electric vehicle. Both ends of the beam body along the second direction and a plurality of connecting members belong to the connection points between the mounting beam and the box body. By setting connecting members between two adjacent mounting members, the large overhanging span between the two ends of the beam body can be divided into multiple smaller overhanging spans, reducing the possible deformation amount of the beam body during mounting.

[0049] In some embodiments, the connecting member includes a first connecting portion, one end of the first connecting portion is connected to the reinforcing beam, and the other end abuts against the box cover.

[0050] Among them, through the setting of the first connecting portion, the reinforcing beam of the box body can be connected, and at the same time, the first connecting portion can also abut against the box cover, playing a role in supporting the middle part of the box cover to prevent the large extended plane on the box cover from fluttering and reducing the resulting noise.

[0051] In some embodiments, an annular sealing groove is provided at the end of the first connecting portion corresponding to the second through hole, and a sealing gasket is accommodated in the annular sealing groove, and the sealing gasket is sealingly abutted against the box cover.

[0052] Among them, an annular sealing groove is provided at the end of the first connecting portion abutting against the box cover corresponding to the second through hole, which can accommodate the sealing gasket. Since the sealing gasket can also be sealingly abutted against the box cover, the sealing performance of the box body is ensured on the basis of the second through hole being provided on the box cover.

[0053] In some embodiments, a plug-in groove is provided on the end face of the reinforcing beam facing the box cover;

[0054] The end of the first connecting portion is arranged in the plug-in groove.

[0055] Among them, a plug-in groove is opened on the reinforcing beam for the end of the first connecting portion to be arranged, which can provide a larger contact area between the end of the first connecting portion and the reinforcing beam, thereby ensuring the connection strength between the first connecting portion and the reinforcing beam.

[0056] In some embodiments, the plug-in groove is provided with a notch; the first connecting portion and the side wall of the plug-in groove are welded and connected at the notch.

[0057] Among them, due to the existence of the notch, the connection position between the plug-in groove and the first connecting portion can be exposed on the side of the reinforcing beam. By welding the side wall of the plug-in groove and the first connecting portion at the notch, more welding points can be obtained, thereby further improving the connection strength between the first connecting portion and the reinforcing beam.

[0058] In some embodiments, the end of the first connecting portion welded to the side wall of the plug-in groove is hollow.

[0059] 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.

[0060] 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;

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] In some embodiments, a second threaded hole is provided at one end of the first connecting portion abutting against the box cover;

[0066] 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.

[0067] 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.

[0068] 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;

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] Among them, while connecting the mounting beam and the reinforcing beam, the connecting piece can also be connected to the mounting bolt 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.

[0075] 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;

[0076] 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;

[0077] Wherein, the first direction and the second direction are arranged to intersect.

[0078] In this solution, the surrounding frame of the box body usually has relatively high structural strength. The two connection end portions of the beam body are respectively connected to the two ends of the surrounding frame along the second direction, which improves the connection reliability between the beam body and the box body. Moreover, this way of connecting the connection end portion of the beam body to the surrounding frame has little impact on the box cover and ensures the sealing effect of the box body. Furthermore, since the beam body is connected to the surrounding 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, so as to improve the mounting stability of the battery device on the electric vehicle.

[0079] In some embodiments, second flanges are respectively provided at both ends of the box cover in the second direction, and the two second flanges are respectively connected to the surrounding frame;

[0080] The two connection end portions are respectively connected to the corresponding second flanges.

[0081] Among them, the way that the box cover is connected to the surrounding frame of the box body through the second flange 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 connection end portion of the beam body is indirectly connected to the surrounding frame through the second flange, which can also ensure that the gravity of the box body is transmitted along the first direction to the beam body. This connection method enables the beam body to be pre-set on the box cover, and finally realizes the gravity transmission from the box body to the beam body through the connection between the box cover and the box body. Through the pre-connection between the beam body and the box cover in this solution, the assembly efficiency of the battery device can be improved.

[0082] In some embodiments, the connection end portion is welded to the corresponding second flange; and / or,

[0083] The connection end portion and the corresponding second flange are bolted to the surrounding frame.

[0084] Among them, welding, as a way of integral connection, has relatively low requirements for the structural environment where the connection points are located. As long as there is sufficient contact area between the two connection points, welding the connection end portion of the beam body to the corresponding second flange has a direct and simple connection method, which can ensure the firmness of the connection between the connection end portion and the second flange, and has little impact on the main body part in the middle of the box cover. Based on the fact that bolt connections are mostly used between the box cover and the box body, in this solution, the bolt connection method can integrally connect the second flange and the connection end portion to the surrounding frame of the box body without adding additional connection structures to the box body.

[0085] In a second aspect, the present application also proposes an electric vehicle, which includes the above-mentioned battery device. Description of the Drawings

[0086] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0087] Figure 1 Schematic diagram of the structure of an embodiment where the electric vehicle provided by the present application is a vehicle;

[0088] Figure 2 Exploded structure schematic diagram of an embodiment of the battery device provided by the present application;

[0089] Figure 3 Top view structure schematic diagram of an embodiment of the battery device provided by the present application;

[0090] Figure 4 For Figure 3 Schematic diagram of the structure of cross-section A-A in

[0091] Figure 5 For Figure 3 Schematic diagram of the structure of cross-section B-B in

[0092] Figure 6 For Figure 5 Enlarged schematic diagram of the local structure in

[0093] Figure 7 For Figure 3 Assembly structure schematic diagram of the box cover and the mounting beam in

[0094] Figure 8 For Figure 7 Schematic diagram of the structure of the box cover in

[0095] Figure 9 For Figure 7 Enlarged schematic diagram of the local part C in

[0096] Figure 10 For Figure 7 Enlarged schematic diagram of the local part D in

[0097] Figure 11 For Figure 7 Enlarged schematic diagram of the local part E in

[0098] Figure 12 For Figure 7 Top view structure schematic diagram of the box cover and the mounting beam in

[0099] Figure 13 For Figure 12 Schematic diagram of the structure of cross-section F-F in

[0100] Figure 14 is Figure 13 an enlarged schematic view of the local part I in

[0101] Figure 15 is Figure 13 a structural schematic view of the first beam plate in

[0102] Figure 16 is Figure 13 a structural schematic view of the second beam plate in

[0103] Figure 17 is Figure 16 an enlarged schematic view of the local part J in

[0104] Figure 18 is Figure 12 a structural schematic view of the section G-G in

[0105] Figure 19 is Figure 12 a structural schematic view of the section H-H in

[0106] Explanation of the reference numerals in the drawings:

[0107] 1000, vehicle;

[0108] 100, battery device; 200, controller; 300, motor; 400, body frame; 410, mounting bolt;

[0109] 1, box body; 11, box main body; 11a, installation cavity; 111, strengthening beam; 111a, insertion slot; 1111a, notch; 112, surrounding frame; 113, bottom plate; 12, box cover; 12a, first strengthening area; 12b, second strengthening area; 12c, third strengthening area; 121, second overlapping edge; 122, second through hole; 2, mounting beam; 2a, cavity; 21, beam main body; 211, beam plate; 211a, first beam plate; 211b, second beam plate; 211c, liquid collecting area; 212, connecting end; 2111, first overlapping edge; 2111a, overlapping edge connecting section; 2111b, strengthening section; 2111c, liquid discharging section; 2111d, liquid discharging channel; 2112, first through hole; 2113, third through hole; 2114, liquid discharging hole; 2115, weight reducing 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, pressing protrusion; 233, sealing gasket; 24, supporting part; 241, through hole nesting; 2411, through hole; 3, battery cell

[0110] X, the first direction; Y, the second direction; Z, the third direction.

[0111] The realization of the purpose of this application, its functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0112] The embodiments of the technical solutions of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of this application more clearly, so they are only examples and cannot be used to limit the protection scope of this application.

[0113] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill 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" and any variations thereof in the description of the specification, claims and the above drawings of this application are intended to cover non-exclusive inclusion.

[0114] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two, unless otherwise specifically defined.

[0115] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0116] In the description of the embodiments of this application, the term "a plurality of" means more than two (including two). Similarly, "a plurality of groups" means more than two groups (including two groups), and "a plurality of pieces" means more than two pieces (including two pieces).

[0117] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0118] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside 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 specific situations.

[0119] 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 on the vehicle body. Since the layout positions of the mounting points on the vehicle bodies of different vehicle models usually vary, after the power battery pack is produced, it can usually only be installed on the vehicle body of a specific vehicle model, which results in poor adaptability of the existing power battery pack to the middle mounting of different vehicle bodies.

[0120] Analyzing the reasons for the above problems, it can be seen that the main reason for the poor adaptability of the existing power battery pack to 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 and is mounted on the vehicle body through a mounting structure passing through the cover plate. Since the layout position of the reinforcing beam inside the box is related to the anti-impact strength and stability of the box structure, therefore, 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 scheme of adjusting the distribution position of the reinforcing beam inside the box has poor feasibility, then it can be considered to externally mount a mounting part on the box. Without changing the box structure of the power battery pack, it is mounted on the vehicle body through the externally mounted mounting part. By designing mounting parts with different mounting layouts for different vehicle models, the adaptability of the box of the power battery pack to the vehicle body can be improved by replacing the mounting parts.

[0121] The battery device disclosed in the embodiments of the present application can be used to provide electrical energy for an electric vehicle, where the electric vehicle can be, but is not limited to, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, the spacecraft can include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0122] For the convenience of description in the following embodiments, a vehicle 1000, which is an electric vehicle in an embodiment of the present application, is taken as an example for description.

[0123] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of an embodiment of the electric vehicle provided by the present application. The 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 for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0124] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0125] After applying the battery device 100 provided by the present application to the electric vehicle, at least the problem of poor mounting adaptability between the existing power battery pack and the vehicle body can be improved.

[0126] For the convenience of understanding the battery device 100 provided by the present application, the following description is made with reference to the accompanying drawings, where Figure 2 is an exploded structural schematic diagram of an embodiment of the battery device provided by the present application; Figure 3 is a top view structural schematic diagram of an embodiment of the battery device provided by the present application; Figure 4 is Figure 3 the structural schematic diagram of section A-A in Figure 5 is Figure 3 the structural schematic diagram of section B-B in Figure 6 is Figure 5 the enlarged schematic diagram of the local structure in Figure 7 is Figure 3 the assembly structural schematic diagram of the box cover and the mounting beam in Figure 8 is Figure 7 the structural schematic diagram of the box cover in Figure 9 isFigure 7 A magnified schematic diagram of the local C in the middle; Figure 10 for Figure 7 A magnified schematic diagram of the local D in the middle; Figure 11 for Figure 7 A magnified schematic diagram of the local E in the middle; Figure 12 for Figure 7 A top view of the structure of the middle box cover and the mounting beam; Figure 13 for Figure 12 Schematic diagram of the structure of the FF in the middle section; Figure 14 for Figure 13 A magnified schematic diagram of part I in the middle; Figure 15 for Figure 13 Structural schematic diagram of the first beam-slab in FIG. Figure 16 for Figure 13 Structural schematic diagram of the second beam slab; Figure 17 for Figure 16 A magnified schematic diagram of the local J in the middle; Figure 18 for Figure 12 Schematic diagram of the structure of GG in the middle section; Figure 19 for Figure 12 Schematic diagram of the structure of the middle section HH.

[0127] 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.

[0128] 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.

[0129] "The 'box body 1' belongs to the main loading component of the battery device 100. The battery device 100 is mounted to the powered vehicle through the box body 1. At the same time, the battery cells 3 are mounted through the mounting cavity 11a of the box body 1. The basic structure of the box body 1 includes a box main body 11 and a box cover 12. The box cover 12 is arranged on the box main body 11 and jointly defines the mounting cavity 11a with the box main body 11. Generally speaking, the battery cells 3 are usually arranged in the box main body 11. After the battery device 100 is mounted to the powered vehicle, the box cover 12 is generally close to the powered vehicle, and the box main body 11 is generally away from the powered vehicle; the mounting cavity 11a can be mainly formed in the box main body 11. At this time, the box main body 11 can be understood as a basin-like structure (as shown in Figure 2 ), and the box cover 12 covers the box main body 11 to cover the mounting cavity 11a; the mounting cavity 11a can also be mainly formed in the box cover 12. At this time, the box cover 12 can be understood as a cover-like structure, and the box cover 12 covers the box main body 11 to cover the battery cells 3 mounted on the box main body 11 into the mounting 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, there are usually multiple battery cells 3. The multiple battery cells 3 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 3. The multiple battery cells 3 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 3 is accommodated in the mounting cavity 11a of the box body 1; of course, the battery cells 3 can also be in the form that multiple battery cells 3 are first connected in series, in parallel, or in a mixed connection to form battery modules, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form the battery cells 3 and are accommodated in the mounting cavity 11a of the box body 1. The battery device 100 can also include other structures. For example, the battery device 100 can also include a busbar component for realizing the electrical connection between multiple battery cells 3 or multiple battery modules, and can also include a heat exchange component for realizing the thermal control of the battery cells 3. Among them, each battery cell 3 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 3 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0130] 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.

[0131] 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.

[0132] In the technical solution provided by this application, a mounting beam 2 is provided on the outer side of the box cover 12 relative to the mounting cavity 11a. The beam body 21 of the mounting beam 2 can be connected to the box body 11, and the mounting member 22 provided in the middle thereof can be mounted and connected to the electric vehicle, forming a gravity transfer path from the box body 11 to the beam body 21, then from the beam body 21 to the mounting member 22, and finally from the mounting member 22 to the electric vehicle. On the basis of making as few modifications to the box body 1 as possible, the mounting connection between the box body 1 of the battery device 100 and the electric vehicle is realized. This mounting solution is less affected by the self-mounting layout of the box body 1, and the mounting beam 2 with a corresponding mounting layout can be designed for different models of electric vehicles, thereby improving the adaptability between the box body 1 of the battery device 100 and the electric vehicle.

[0133] Please refer to Figure 12 、 Figure 18 and Figure 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 farther from the box cover 12 than 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.

[0134] It should be noted that for "the beam body 21 includes two beam plates 211 that are opposite and connected along the first direction X", the connection method between the two beam plates 211 can be divided into direct connection and indirect connection. In the case of indirect connection, other connection components can be provided between the two beam plates 211. At this time, the two beam plates 211 are spaced apart relative to each other 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 spaced apart, and the other areas are used for the mounting member 22 to be arranged between the two beam plates 211; for "a first through hole 2112 is provided on the first beam plate 211a", the first through hole 2112 generally penetrates along the first direction X. "The mounting member 22 is arranged corresponding to the first through hole 2112" means that the part of the mounting member 22 actually used for mounting and connecting corresponds to the first through hole 2112. For example, this part used for mounting and connecting 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 electric vehicle; for "the mounting member 22 is at least partially fixedly arranged between the first beam plate 211a and the second beam plate 211b", it means that the mounting member 22 can be completely between the first beam plate 211a and the second beam plate 211b, or only a small part of the structure is between the first beam plate 211a and the second beam plate 211b, and the rest of the structure is on one side of the first beam plate 211a or the second beam plate 211b. This embodiment does not make any limitations in this regard.

[0135] 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 in the beam body 21. On the one hand, it can increase the connection area between the mounting member 22 and the beam body 21 to ensure the stability of the connection. On the other hand, it can also make the effective part of the mounting member 22 for mounting and connecting along the first direction X coincide with the beam body 21, so as to control the overall dimension of the mounting beam 2 along the first direction X, ensure that the box cover 12 is as close as possible to the electric vehicle, and thus reduce the risk of the bottom of the box body 11 being collided; Moreover, the form in which the two beam plates 211 are arranged oppositely, combined with the connection and fixation of the mounting member 22 to the two beam plates 211, can not only ensure the overall mounting strength of the mounting beam 2, but also play a role in weight reduction, meeting the lightweight design requirements of the battery device 100.

[0136] Please refer to Figure 4 and Figure 18 , in some embodiments, the mounting member 22 includes a nut insert 221, and the nut insert 221 has a first threaded hole 2211 for connecting the mounting bolt 410 of the electric vehicle.

[0137] It should be noted that the mounting member 22 may only include the nut insert 221, or may also include other connection structures or limiting structures other than the nut insert 221, and this embodiment does not limit this; the nut insert 221 usually has a first threaded hole 2211 that is located in the middle and penetrates along its axial direction. It should be understood that in the embodiment of the present application, the first threaded hole 2211 of the nut insert 221 is arranged corresponding 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 insert 221 is not blocked by the first through hole 2112. For example, when the nut insert 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 connect to the nut insert 221.

[0138] According to the above technical solution, the mounting member 22 is connected to the mounting bolt 410 of the electric vehicle through the nut insert 221, and the mounting member 22 can bear a large tensile stress load through the threaded pair connection method, ensuring a firm connection.

[0139] Please refer to Figure 4 and Figure 18 , in some embodiments, the nut insert 221 extends out of the first through hole 2112 along the first direction X.

[0140] It should be noted that "the nut insert 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.

[0141] According to the above technical solution, the nut insert 221 extends out of the through hole, so that the first threaded hole 2211 on the nut insert 221 has a longer connection length, ensuring that the mounting bolt 410 and the first threaded hole 2211 have a larger connection contact area, and further improving the connection firmness between the nut insert 221 and the mounting bolt 410.

[0142] Please refer to Figure 4 and Figure 18 , in some embodiments, an annular protrusion 222 is formed on the circumferential side of the end of the nut insert 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.

[0143] It should be noted that "the end of the nut insert 221 away from the box cover 12" can also be understood as the end of the nut insert 221 close to the first beam plate 211a. The "annular protrusion 222" is formed on the circumferential side of the nut insert 221, and its specific forming methods include integral casting and welding connection forming. Since the first through hole 2112 is formed in 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.

[0144] According to the above technical solution, by providing the annular protrusion 222 on the circumferential side of the nut insert 221 and fixedly connecting the annular protrusion 222 corresponding to the periphery of the first through hole 2112 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 insert 221 and the first beam plate 211a, improving the connection firmness between the nut insert 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 supporting effect on the first beam plate 211a and the second beam plate 211b, thus ensuring the stiffness of the beam body 21.

[0145] Please refer to Figure 4 and Figure 18 , in some embodiments, the peripheries of the two beam plates 211 are fixedly connected, and a cavity 2a is jointly defined therebetween; at least part of the mounting member 22 is disposed in the cavity 2a.

[0146] It should be noted that, as a plate-like structure, the beam plate 211 usually 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, in Figure 12 In the illustrated embodiment, the extended plane of the beam plate 211 is parallel to the plane where the second direction Y and the third direction Z are located, that is, perpendicular to and intersecting the first direction X.

[0147] According to the above technical solution, the peripheries of the two beam plates 211 are fixedly connected, and a cavity 2a is defined therebetween. That is, the two beam plates 211 are connected to form a hollow shell structure, and the existence of the hollow shell structure can further improve the mounting capacity of the beam main body 21.

[0148] Specifically, please refer to Figure 15 , a weight-reducing hole 2115 communicating with 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 provided on the first beam plate 211a to reduce the weight of the mounting beam 2. In the embodiment of the present application, the shape, size, quantity and specific setting position of the weight-reducing hole 2115 are not limited.

[0149] Please refer to Figure 15 and Figure 16 , in some embodiments, a first overlapping edge 2111 is provided at the periphery of each beam plate 211, and the first overlapping edges 2111 of the two beam plates 211 are fixedly connected.

[0150] It should be noted that since the two beam plates 211 correspond in the first direction X, their respective first overlapping edges 2111 should also correspond in the first direction X. It can also be understood that the projections of the first overlapping edges 2111 of the two beam plates 211 in the first direction X coincide; the "first overlapping edge 2111" can also be understood as a flange edge, and its main function is to provide a connection foundation. The first overlapping edge 2111 is usually turned outwards relative to the cavity 2a; for the "fixed connection of the first overlapping edges 2111 of the two beam plates 211", the fixed connection method can be bolt connection or welding connection, which is not limited in this embodiment; since a cavity 2a also needs to be defined between the two beam plates 211, the specific structural forms of the two beam plates 211 can be that one of the beam plates 211 is arranged flat, and the middle part of the other beam plate 211 is recessed away from the corresponding beam plate 211 to form the cavity 2a, or the middle parts of the two beam plates 211 are recessed away from each other, as shown in Figure 18 and Figure 19 .

[0151] According to the above technical solution, in the form of fixed connection through two first tabs 2111, the connection area between two beam plates 211 can be increased, that is, the connection strength between the two beam plates 211 is improved. Moreover, during the connection process, the two first tabs 2111 can be stably stacked, which is beneficial to maintaining the relative position, thereby reducing the connection difficulty.

[0152] Specifically, the first tabs 2111 of the two beam plates 211 are fixedly connected by welding glue. As Figures 9 to 10 shown, the area of the first tab 2111 where the triangle is located in the figure is the area fixedly connected by welding glue, and the first tab 2111 in this area is horizontally extended.

[0153] Please further refer to Figures 9 to 11 , in some embodiments, in the circumferential direction of the beam plate 211, the first tab 2111 is formed with a plurality of strengthening segments 2111b, and the strengthening segments 2111b are recessed relative to their surrounding areas towards or away from the box cover 12.

[0154] It should be noted that the "circumferential direction of the beam plate 211" can be understood as the circumferential direction in the relative direction of the two beam plates 211, that is, the circumferential direction of the beam plate 211 along the first direction X; if the first tab 2111 is isolated from the beam plate 211, it can be understood that the first tab 2111 should be annularly arranged. In the circumferential direction of the beam plate 211, that is, in the surrounding direction of the first tab 2111, the first tab 2111 has a plurality of strengthening segments 2111b. Adjacent two strengthening segments 2111b can be connected or there can be other tab segments arranged at intervals between them. The surrounding area of the strengthening segment 2111b can be another strengthening segment 2111b connected to it or other tab segments. "The strengthening segment 2111b is recessed relative to its surrounding area towards or away from the box cover 12" can be understood as that a plurality of strengthening segments 2111b are all recessed towards the box cover 12 relative to their surrounding areas, or all recessed away from the box cover 12, or alternately recessed towards and away from the box cover 12, so as to form a wavy first tab 2111; it is worth mentioning that this concave structure of the "strengthening segment 2111b" is usually formed by stamping.

[0155] According to the above technical solution, by processing a plurality of strengthening segments 2111b on the first tab 2111, since the strengthening segment 2111b is recessed relative to its surrounding area, the connection area between the two first tabs 2111 is increased, and the connection strength between the two beam plates 211 can be further improved.

[0156] Please refer to Figure 9 and Figure 14, in some embodiments, in the circumferential direction of the beam slab 211, the first overlapping edge 2111 has a liquid drainage section 2111c; at least a part of the liquid drainage sections 2111c of the two first overlapping edges 2111 are spaced apart, and a liquid drainage channel 2111d is defined, and the liquid drainage channel 2111d communicates with the cavity 2a.

[0157] It should be noted that the definitions of "the circumferential direction of the beam slab 211" and "the first overlapping edge 2111" have been described in the above embodiments, and the following embodiments will not repeat them; since the two first overlapping edges 2111 correspond in the first direction X, the liquid drainage sections 2111c of the two first overlapping edges 2111 should also correspond in the first direction X. "At least a part of the liquid drainage sections 2111c of the two first overlapping edges 2111 are spaced apart" can be understood as that the liquid drainage sections 2111c of the two first overlapping edges 2111 are spaced apart throughout their entire lengths, and at this time, the caliber of the defined liquid drainage channel 2111d is larger. It can also be understood as that the liquid drainage sections 2111c of the two first overlapping edges 2111 are spaced apart locally in their lengths. Obviously, at this time, the caliber of the defined liquid drainage channel 2111d is smaller; there are various ways of spacing between the two liquid drainage sections 2111c. For example, one of the liquid drainage sections 2111c is recessed and deformed away from the other liquid drainage section 2111c, or the two liquid drainage sections 2111c are recessed and deformed away from each other, or the two liquid drainage sections 2111c are recessed and deformed to different degrees in the same direction. This embodiment does not limit this.

[0158] According to the above technical solution, the two beam slabs 211 are at least partially spaced apart at the liquid drainage sections 2111c of the first overlapping edge 2111, so as to define a liquid drainage channel 2111d communicating with the cavity 2a. When the electric vehicle wades through water and causes water to accumulate in the cavity 2a of the beam main body 21, the accumulated water can be discharged through the liquid 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 and ensure the service life of the mounting beam 2.

[0159] Please refer to Figure 7 , Figure 9 and Figure 12 , in some embodiments, the box cover 12 has a second overlapping edge 121 at the end on the second direction Y side, and the second overlapping edge 121 is connected to the box main body 11; the first overlapping edge 2111 has an overlapping edge connection section 2111a at the end on the second direction Y side, the first overlapping edge 2111 is connected to the second overlapping edge 121, and the liquid drainage section 2111c is located at the overlapping edge connection section 2111a; wherein, the first direction X intersects with the second direction Y.

[0160] It should be noted that the "second flange 121" can be understood as a flange edge, and its main function is to provide a connection foundation. The second flange 121 is usually turned outwards relative to the installation cavity 11a; the lid 12 can form the second flange 121 only at the side end in its second direction Y. Of course, the second flange 121 can also be formed at the side end in its third direction Z, as shown in Figure 12 This embodiment does not limit this; "the second flange 121 is connected to the box body 11". The box body 11 usually corresponds to the second flange 121 and is also provided with a flange structure, for example, as shown in Figure 2 . The connection method between the second flange 121 and the box body 11 usually includes bolt connection, but is not limited thereto; it is worth mentioning that in the first direction X, the second flange 121 of the lid 12 usually belongs to the structure on the lid 12 that is closer to the box body 11. That is, after the battery device 100 is installed on the electric vehicle, the second flange 121 of the lid 12 belongs to the structure with a lower elevation on the lid 12.

[0161] According to the above technical solution, since the beam body 21 is located on the side of the lid 12 away from the box body 11, and the first flange 2111 of the beam plate 211 is connected to the box body 11 through the flange connection section 2111a, it can be determined that the flange connection section 2111a is closer to the box body 11 in the first direction X than the rest of the first flange 2111. The drain section 2111c is arranged at the flange connection section 2111a. When the cavity 2a of the beam body 21 accumulates water, the accumulated water can flow autonomously to the flange connection section 2111a with a lower elevation and be discharged outwards through the drain channel 2111d defined here, which can improve the drainage efficiency of the beam body and is conducive to emptying the accumulated water.

[0162] Moreover, the drain section 2111c can also be arranged at other positions on the first flange 2111 except the flange connection section 2111a. For example, as shown in Figure 11 , the drain section 2111c and the strengthening section 2111b are arranged in an alternating manner.

[0163] Please refer to Figure 12 . In some embodiments, the drain section 2111c is recessed relative to its surrounding area away from the lid 12.

[0164] It should be noted that in this embodiment, "the liquid drainage section 2111c is recessed relative to its surrounding area away from the box cover 12" means that the liquid drainage sections 2111c on the edge connection sections 2111a of the two first edges 2111 are both recessed relative to their surrounding areas away from the box cover 12. At this time, a liquid drainage channel 2111d needs to be defined between the two liquid drainage sections 2111c. It can be understood that there are differences in the degree of depression of the two liquid drainage sections 2111c; it is worth mentioning that the liquid drainage section 2111c only belongs to a part of the edge connection section 2111a. The edge connection section 2111a also includes the main body part other than the liquid drainage section 2111c, and is connected to the second edge 121 of the box cover 12 through this main body part, as Figure 9 shown.

[0165] According to the above technical solution, by setting the liquid drainage section 2111c to be recessed relative to its surrounding area away from the box cover 12, the liquid drainage sections 2111c of the two first edges 2111 are spaced apart due to their different degrees of depression, so as to define the liquid drainage channel 2111d. Moreover, the form of the recessed setting of the liquid drainage section 2111c is also beneficial to improving the structural strength of the first edge 2111; not only that, the recessed setting of the liquid drainage section 2111c away from the box cover 12 has little impact on the connection between the main body part of the edge connection section 2111a and the second edge 121 of the box cover 12.

[0166] Please refer to Figure 16 and Figure 17 , in some embodiments, a liquid drainage hole 2114 is provided at a position where the second beam plate 211b is close to the box body 11.

[0167] It should be noted that the liquid drainage hole 2114 penetrates through the second beam plate 211b along the first direction X to communicate the cavity 2a of the beam main body 21 with the outside. Whether the second beam plate 211b is spaced apart or abuts against the box cover 12, it is necessary to ensure that the liquid drainage hole 2114 can be avoided so that the accumulated water can smoothly pass through the liquid drainage hole 2114; after the battery device 100 is installed on the electric vehicle, the position where the second beam plate 211b is close to the box body 11 is the position with a lower terrain on the second beam plate 211b.

[0168] 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, setting the liquid drainage hole 2114 at a position where the second beam plate 211b is close to the box body 11 is beneficial to the accumulated water in the cavity 2a to drain outwards automatically through the liquid drainage hole 2114, which can effectively prevent the inner wall of the cavity 2a from rusting due to long-term contact with the accumulated water, and ensures the service life of the mounting beam 2.

[0169] Please refer to Figures 10 to 17, in some embodiments, the second beam plate 211b is attached to the lid 12 and has a liquid collecting area 211c. The liquid collecting area 211c is recessed away from the lid 12 relative to its surrounding area, and together with the lid 12, defines a liquid collecting cavity. The liquid collecting cavity extends to the side of the second beam plate 211b to form a cavity opening; the drain hole 2114 is provided in the liquid collecting area 211c.

[0170] It should be noted that, on the premise that the second beam plate 211b is attached to the lid 12 and the drain hole 2114 is provided in the liquid collecting area 211c, setting the liquid collecting area 211c to be recessed away from the lid 12 can define a liquid collecting cavity between the liquid collecting area 211c and the lid 12, thereby preventing the drain hole 2114 from being blocked; "the liquid collecting cavity extends to the side of the second beam plate 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 plate 211b, so as to form an arched opening on the side of the second beam plate 211b, and this arched opening is also the cavity opening of the liquid collecting cavity; the specific shape of the liquid collecting area 211c in this embodiment is not limited. For example, the liquid collecting area 211c can be set as Figure 17 the cross-shaped structure shown, and the cross-shaped liquid collecting area 211c 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.

[0171] According to the above technical solution, by attaching the second beam plate 211b to the lid 12, it is beneficial 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 being collided. On this basis, the second beam plate 211b can jointly define a liquid collecting cavity with the lid 12 through its liquid collecting area 211c, and the drain hole 2114 is provided 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 towards the side of the second beam plate 211b through the cavity opening of the liquid collecting cavity. This solution uses the recessed setting of the liquid collecting area 211c away from the lid 12, which can not only achieve the purpose of diverting drainage, but also play a role in enhancing the structural strength of the second beam plate 211b.

[0172] Please refer to Figure 8 and Figure 10 , in some embodiments, the lid 12 has a first strengthening area 12a and a second strengthening area 12b that are connected to each other. The first strengthening area 12a and the second strengthening area 12b are recessed towards the box body 11 relative to their respective surrounding areas, and the second strengthening area 12b extends to the side end of the lid 12; the second beam plate 211b is accommodated in the first strengthening area 12a, and the cavity opening of the liquid collecting cavity is correspondingly provided with respect to the second strengthening area 12b.

[0173] It should be noted that both the first strengthening area 12a and the second strengthening area 12b belong to the local structures on the lid 12 that are recessed towards the box body 11. Therefore, corresponding groove structures can be formed on the side of the lid 12 facing away from the box body 11. The groove structure corresponding to the first strengthening area 12a can accommodate the second beam plate 211b, and the groove structure corresponding to the second strengthening area 12b can communicate with the groove structure corresponding to the first strengthening area 12a and extend through to the side end of the lid 12; "the cavity opening of the liquid collecting cavity is correspondingly arranged with respect to the second strengthening area 12b" means that the notch position where the groove structure corresponding to the second strengthening area 12b communicates with the groove structure corresponding to the first strengthening area 12a corresponds to the cavity opening of the liquid collecting cavity, so that the accumulated water discharged from the cavity opening of the liquid collecting cavity can flow into the groove structure corresponding to the second strengthening area 12b.

[0174] According to the above technical solution, since the first strengthening area 12a and the second strengthening area 12b are recessed towards the box body 11, the structural strength of the box body 11 can be improved. And by accommodating the second beam plate 211b in the first strengthening area 12a, the distance between the beam body 21 and the box body 11 in the first direction X can be further reduced, that is, the size of the battery device 100 in the first direction X is reduced. On this basis, since the second strengthening area 12b is connected to the first strengthening area 12a, the cavity opening of the liquid collecting cavity can directly drain liquid to the second strengthening area 12b, and the accumulated water can flow out towards the side end of the lid 12 under the guidance of the second strengthening area 12b. This solution takes into account the improvement of the structural strength of the lid 12, the reduction of the size of the battery device 100 in the first direction X, and the drainage guidance of the accumulated water in the liquid collecting cavity.

[0175] Please refer to Figure 5 and Figure 6 , in some embodiments, the box body 11 includes a strengthening beam 111 disposed in the installation cavity 11a; the lid 12 is formed with a second through hole 122 corresponding to the strengthening beam 111; the battery device 100 includes a connecting member 23, the connecting member 23 extends along the first direction X, and one end is connected to the strengthening beam 111 and the other end extends out of the second through hole 122 and is connected to the beam body 21.

[0176] It should be noted that a reinforcing beam 111 is provided inside the box body 11. The reinforcing beam 111 generally includes a cross beam and a longitudinal beam. Generally, in order to support the side walls of the box body 11 opposite to each other in the second direction and the side walls opposite to each other in the third direction, so as to improve the impact resistance and structural stability of the structure of the box body 11, this embodiment will not elaborate on this; the second through hole 122 formed corresponding to the reinforcing beam 111 on the box cover 12 penetrates along 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 and is thus connected to the beam body 21. Among them, there are various possible connection methods between the connecting member 23 and the reinforcing beam 111. For example, they can be connected through a threaded structure or can also be connected through a snap connection. There are usually various possible connection methods between the connecting member 23 and the beam body 21, and they can also be connected through a threaded structure or through a snap connection. At the same time, the specific structure of the connecting member 23 is usually related to the specific connection methods between the connecting member 23, the reinforcing beam 111, and the beam body 21. This embodiment does not limit this.

[0177] According to the above technical solution, through the setting of the connecting member 23, the reinforcing beam 111 of the box body 11 can be connected to the beam body of the mounting beam 2, which plays an indirect role in connecting the mounting beam 2 and the box body 11, provides more connection points between the mounting beam 2 and the box body 11, and can improve the connection strength between the two.

[0178] Please refer to Figure 3 , in some embodiments, both ends of the beam body 21 in the second direction Y are connected to the box body 11; a plurality of mounting members 22 are arranged along the second direction Y, and at least one connecting member 23 is provided between two adjacent mounting members 22; among them, the first direction X intersects with the second direction Y.

[0179] 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 can be provided between two adjacent mounting members 22 (as Figure 3 shown, the mounting members 22 and the connecting members 23 are arranged in a staggered manner in the second direction Y), or two connecting members 23 can be provided, or even multiple connecting members 23 can be provided. This is determined based on the layout of the reinforcing beam 111 inside the box body 11. For example, when the reinforcing beam 111 extends along the second direction Y inside the box body 11 and is opposite to the beam body 21 of the mounting beam 2 in the first direction X, connecting members 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 extends along the third direction Z inside 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 a connecting member 23 can only be provided at the intersection point to connect the beam body 21. This embodiment does not limit the specific number and position of the connecting members 23.

[0180] According to the above technical solution, arranging a plurality of mounting members 22 on the beam main body 21 can meet the special layout requirements of multiple mounting points of the corresponding electric vehicle. Both ends of the beam main body 21 along the second direction Y and a plurality of connecting members 23 all belong to the connection points between the mounting beam 2 and the box main body 11. By arranging the connecting members 23 between two adjacent mounting members 22, the relatively large suspended span between the two end portions of the beam main body 21 can be divided into multiple smaller suspended spans, reducing the possible deformation amount of the beam body during mounting.

[0181] Please refer to 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 abuts against the box cover 12.

[0182] It should be noted that the first connecting portion 231 is the part of the connecting member 23 located in the installation cavity 11a. The connecting member 23 of course also includes the part 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 of course it is not limited to this.

[0183] According to the above technical solution, through the arrangement of the first connecting portion 231, the reinforcing beam 111 of the box main body 11 can be connected. At the same time, the first connecting portion 231 can also abut against the box cover 12, playing a role in supporting the middle part of the box cover 12 to prevent the large extended plane on the box cover 12 from fluttering and reducing the noise generated thereby.

[0184] Please refer to 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. A sealing gasket 233 is accommodated in the annular sealing groove 2311, and the sealing gasket 233 seals and abuts against the box cover 12.

[0185] 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 that abuts against the box cover 12. "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 multi-sided 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, to fill the gap between the end of the first connecting portion 231 and the box cover 12 through its own deformation and achieve an interference fit.

[0186] According to the above technical solution, an annular sealing groove 2311 is provided at the end of the first connecting portion 231 that abuts against the end of the box cover 12 corresponding to the second through hole 122, and the sealing gasket 233 can be accommodated therein. Since the sealing gasket 233 can also be sealingly abutted against the box cover 12, the sealing performance of the box body 1 is ensured on the basis of the second through hole 122 being provided on the box cover 12.

[0187] Please refer to Figure 5 , in some embodiments, the end face of the reinforcing beam 111 facing the box cover 12 is provided with a plug-in groove 111a; the end of the first connecting portion 231 is disposed in the plug-in groove 111a.

[0188] It should be noted that the plug-in groove 111a mentioned in the embodiments of the present application is only open at one end of the reinforcing beam 111 facing the box cover 12 and does not penetrate the bottom of the box body 11; the end of the first connecting portion 231 is disposed in the plug-in groove 111a. Specifically, the first connecting portion 231 and the reinforcing beam 111 can be connected by a plug inserted from the side. Of course, the first connecting portion 231 can also be clamped by a limiting clamping structure provided in the plug-in groove 111a. This embodiment does not make a limitation in this regard.

[0189] According to the above technical solution, a plug-in groove 111a is provided on the reinforcing beam 111 for the end of the first connecting portion 231 to be disposed, which can provide a relatively large contact area between the end of the first connecting portion 231 and the reinforcing beam 111, thereby ensuring the connection strength between the first connecting portion 231 and the reinforcing beam 111.

[0190] Please continue to refer to Figure 5 , in some embodiments, the plug-in groove 111a is provided with a notch 1111a; the first connecting portion 231 and the side wall of the plug-in groove 111a are welded at the notch 1111a.

[0191] It should be noted that "the plug-in groove 111a is provided with a notch 1111a" means that the side wall of the plug-in groove 111a penetrates the reinforcing beam 111 laterally to form a notch 1111a. Due to the existence of the notch 1111a, the end of the first connecting portion 231 extending into the plug-in groove 111a can be exposed to the side of the reinforcing beam 111. As Figure 5 shown, notches 1111a are formed on both the left and right sides of the plug-in groove 111a in the figure, thereby laterally exposing the first connecting portion 231, and four welding points shown in the circles in the figure can be obtained.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] See also Figure 6 and Figure 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.

[0197] It should be noted that the beam body 21 is provided with a third through hole 2113 corresponding to the second through hole 122. The second through hole 122 and the third through hole 2113 are opposite 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 second connecting portion 232 is another part of the connecting member 23 connected to the first connecting portion 231. There are various possible connection methods between the second connecting portion 232 and the first connecting portion 231, such as snap connection and pin connection. In this embodiment, the specific connection method between the first connecting portion 231 and the second connecting portion 232 is not limited. The first end of the second connecting portion 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 connecting portion 232 is larger and at least larger than the aperture of the third through hole 2113, so that the first end of the second connecting portion 232 can abut against the beam body 21.

[0198] According to the above technical solution, since the first connecting portion 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 portion 232 abutting against the beam body 21, the box cover 12 and the beam body 21 are clamped and fixed from both sides by the first connecting portion 231 and the second connecting portion 232 respectively, realizing the fixed connection between the connecting member 23 and the beam body. Moreover, this solution also realizes the relative fixation between the beam body and the box cover 12, improving the stiffness and mode of the box cover 12.

[0199] Please refer to Figure 8 and Figure 12 , in some embodiments, the box cover 12 has a third strengthening area 12c disposed adjacent to the second through hole 122. The third strengthening area 12c is recessed relative to its surrounding area towards or away from the box body 11.

[0200] It should be noted that the third strengthening area 12c belongs to a local recessed structure of the box cover 12, which can enhance the structural strength of the box cover 12. In this embodiment, the specific recessed direction of the third strengthening area 12c relative to its surrounding area is not limited.

[0201] According to the above technical solution, since the connecting member 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 stressed at the second through hole 122. By providing the third strengthening area 12c at a position adjacent to the second through hole 122 of the box cover 12 and through the recessed setting of the third strengthening area 12c, the structural strength of the box cover 12 can be increased.

[0202] Please refer to Figure 6, in some embodiments, a second threaded hole 2312 is provided at one end of the first connecting portion 231 that abuts against the box cover 12; the second connecting portion 232 is provided with a stud 2322 that is disposed through the second through hole 122, and the stud 2322 is connected to the second threaded hole 2312.

[0203] It should be noted that the first connecting portion 231 in this embodiment can be set as a connecting bolt; since the second threaded hole 2312 is located in the first connecting portion 231, in order to prevent water from accumulating in the second threaded hole 2312 and causing the thread to rust, a sealant can be applied at the threaded connection between the stud 2322 and the second threaded hole 2312.

[0204] According to the above technical solution, the first connecting portion 231 and the second connecting portion 232 are connected by the stud 2322 and the second threaded hole 2312. This threaded connection method has a relatively high connection strength, a simple structure, and is easy to operate.

[0205] Please continue to refer to Figure 6 , in some embodiments, the beam main body 21 includes a first beam plate 211a and a second beam plate 211b that are opposite and connected in a first direction, the second beam plate 211b abuts against 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 hole 122, and a support portion 24 is provided between the first beam plate 211a and the second beam plate 211b; a pressing protrusion 2323 is provided on the periphery of the first end of the second connecting portion 232 corresponding to the support portion 24, and the pressing protrusion 2323 abuts against the first beam plate 211a.

[0206] It should be noted that the first beam plate 211a and the second beam plate 211b are opposite 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 disposed farther 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 hole 122, and the second through hole 122 and the two third through holes 2113 are opposite 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 first beam plate 211a and the second beam plate 211b, and a pressing protrusion 2323 is provided on the periphery of the first end of the second connecting portion 232 corresponding to the support portion 24, and the pressing protrusion 2323 abuts against the first beam plate 211a to apply a clamping pressure thereto. The clamping pressure sequentially 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, and finally is transmitted to the first connecting portion 231; in this embodiment, the pressing protrusion 2323 can be a convex block structure facing the second direction Y or the third direction Z, or can also be Figure 6 the annular structure shown in

[0207] According to the above technical solution, by arranging the first beam plate 211a and the second beam plate 211b at intervals in the first direction X, the purpose of reducing the weight of the beam body is achieved. On this basis, since the first beam plate 211a and the second beam plate 211b respectively need to bear the abutting forces from the second connecting part 232 and the first connecting part 231, by arranging the pressing protrusion 2323 corresponding to the periphery of the second connecting part 232 between the first beam plate 211a and the second beam plate 211b and arranging the supporting part 24, the supporting part 24 can bear the abutting force to improve the stiffness of the beam body.

[0208] Please refer to Figure 19 , in some embodiments, the supporting part 24 includes a through-hole nest 241. The two ends of the through-hole nest 241 are respectively fixedly connected to the first beam plate 211a and the second beam plate 211b, and the through-hole 2411 of the through-hole nest 241 is arranged corresponding to the second through-hole 122.

[0209] It should be noted that in this embodiment, the two ends of the through-hole nest 241 in the first direction X (that is, the two ends along its axis) are respectively fixedly connected to the first beam plate 211a and the second beam plate 211b. The through-hole 2411 of the through-hole nest 241 is arranged corresponding to the second through-hole 122 in the first direction X. There is no necessary size relationship between the aperture of the through-hole 2411 of the through-hole nest 241 and the second through-hole 122, as long as the second end of the second connecting part 232 can pass through.

[0210] According to the above technical solution, by arranging the through-hole nest 241, support can be provided for the first beam plate 211a and the second beam plate 211b at various positions on the periphery of the second through-hole 122, further improving the stiffness of the beam body.

[0211] Please refer to Figure 6 , in some embodiments, a second connecting part 232 is arranged at one end of the connecting piece 23 away from the reinforcing beam 111. A third threaded hole 2321 is arranged on the second connecting part 232 along the first direction X for connecting with the mounting bolt 410 of the electric vehicle.

[0212] It should be noted that in the battery device 100 provided in this embodiment, the mounting points on the reinforcing beam 111 of the box body 11 can correspond to the mounting point positions of the part of the electric vehicle, so that the second connecting part 232 of the connecting piece 23 can be connected to the mounting bolt 410 of the electric vehicle through its own third threaded hole 2321.

[0213] According to the above technical solution, while the connector 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 electric vehicle through the third threaded hole 2321 on its second connecting portion 232, which also plays a role in mounting, improving the mounting firmness between the battery device 100 and the electric vehicle.

[0214] Please refer to Figure 2 and Figure 12 , in some embodiments, the box body 11 includes a surrounding frame 112 and a bottom plate 113. The bottom plate 113 is disposed on one side of the surrounding frame, and the box cover 12 is disposed on the other side of the surrounding frame 112; the beam body 21 has two connecting ends 212 at both ends in the second direction Y, and the two connecting ends 212 are respectively connected to both ends of the surrounding frame 112 along the second direction Y; wherein, the first direction X intersects with the second direction Y.

[0215] It should be noted that for most battery devices 100, the box body 11 usually includes a bottom plate 113 and a surrounding frame 112. The surrounding frame 112 surrounds and forms the above-mentioned installation cavity 11a, and the installation cavity 11a is open on both sides of the surrounding frame 112 (for example, open on both sides of the surrounding frame 112 along the first direction X). The bottom plate 113 is disposed on one side of the surrounding frame 112 to support the battery cells 3, and the box cover 12 is disposed on the other side of the surrounding frame 112 to cover the installation cavity 11a; the surrounding frame 112 and the bottom plate 113 have various structural forms. For example, when the box body 11 is a stamping box body, the surrounding frame 112 and the bottom plate 113 include a stamping thin-wall structure. When the box body 11 is a profile box body, the surrounding frame 112 and the bottom plate 113 include a profile structure. The embodiments of the present application do not limit this; in some structural types of the box body 11, the surrounding frame 112 usually includes two expansion beams opposite to each other in the second direction Y and two side beams opposite to each other in the third direction. For this kind of surrounding 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. The embodiments of the present application do not limit this.

[0216] The "connecting end 212" refers to the end of the beam body 21 in the second direction Y for connecting the box body 11. The specific structural form of the connecting end 212 can be various. For example, when the peripheral edge of the beam body 21 forms a first flange 2111 along the first direction X, the connecting end 212 can include a flange connecting section 2111a on the first flange 2111 in the second direction Y. The embodiments of the present application do not limit this.

[0217] According to the above technical solution, the surrounding frame 112 of the box body 11 generally has high structural strength. By connecting the two connecting ends 212 of the beam body 21 to the two ends of the surrounding frame 112 along the second direction Y respectively, the connection reliability between the beam body 21 and the box body 11 is improved. Moreover, this way of connecting the connecting ends 212 of the beam body 21 to the surrounding frame 112 has little influence on the box cover 12, ensuring the sealing effect of the box body 1. Moreover, since the beam body 21 is connected to the surrounding frame 112 at both ends in 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, so as to improve the mounting stability of the battery device 100 on the electric vehicle.

[0218] Please refer to Figure 12 , in some embodiments, second overlapping edges 121 are respectively provided at both ends of the box cover 12 in the second direction Y, and the two second overlapping edges 121 are respectively connected to the surrounding frame 112; the two connecting ends 212 are respectively connected to the corresponding second overlapping edges 121.

[0219] The above embodiments have explained the second overlapping edge 121, and this embodiment will not be elaborated here.

[0220] According to the above technical solution, the box cover 12 is connected to the surrounding frame 112 of the box body 11 through the second overlapping edge 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 connecting ends 212 of the beam body 21 are indirectly connected to the surrounding frame 112 through the second overlapping edge 121, which can also ensure that the gravity of the box body 1 is transmitted to the beam body 21 along the first direction X. This connection method enables the beam body 21 to be pre-set on the box cover 12, and finally realizes the gravity transmission from the box body 1 to the beam body 21 through the connection between the box cover 12 and the box body 11. By pre-connecting the beam body 21 and the box cover 12 in this solution, the assembly efficiency of the battery device 100 can be improved.

[0221] Please refer to Figure 9 , in some embodiments, the connecting end 212 is welded to the corresponding second overlapping edge 121; and / or, the connecting end 212 and the corresponding second overlapping edge 121 are bolted to the surrounding frame 112.

[0222] It should be noted that the above two parallel technical features, "the connecting end 212 is welded to the corresponding second overlapping edge 121" and "the connecting end 212 and the corresponding second overlapping edge 121 are bolted to the box body 11", can be set alternatively or simultaneously. Obviously, the effect of setting them simultaneously is better.

[0223] According to the above technical solution, welding, as a way of integral connection, has relatively low requirements for the structural environment where the connection points are located. As long as there is sufficient contact area between two connection points, the connection end 212 of the beam body 21 is welded to the corresponding second overlapping edge 121. Its connection method is direct and simple, which can ensure the firmness of the connection between the connection end 212 and the second overlapping edge 121, and has little impact on the main body part in the middle of the box cover 12; based on the fact that bolts are mostly used for connection between the box cover 12 and the box body 11, in this solution, the second overlapping edge 121 and the connection end 212 can be integrally connected to the surrounding frame 112 of the box body 11 through bolt connection, without adding additional connection structures to the box body 1.

[0224] The present application also proposes an electric vehicle, which includes a battery device 100 for providing electric energy. The specific structure of the battery device 100 refers to the above embodiments. Since this electric vehicle adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. Among them, the battery device 100 is used to provide electric energy for the electric vehicle. The electric vehicle includes, but is not limited to, new energy vehicles such as pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles, as well as engineering vehicles such as electric excavators and electric bulldozers, and may also include aircraft such as electric drones and electric passenger planes.

[0225] 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 flange 2111 has a plurality of reinforcing sections 2111b arranged circumferentially along the beam plate 211. The reinforcing sections 2111b are recessed towards or away from the box body 11 relative to their peripheral regions. The first flange 2111 has two flange connection sections 2111a at both ends in the second direction Y. The two flange connection sections 2111a are respectively connected to two second flanges 121 of the box cover 12 and are commonly connected to the box body 11 by bolts. The second beam plate 211b abuts against the box cover 12 and is accommodated in the first reinforcing area 12a of the box cover 12. The second beam plate 211b has a liquid collecting area 211c. The liquid collecting area 211c is recessed away from the box cover 12 relative to its peripheral region and jointly defines a liquid collecting cavity with the box cover 12. The liquid collecting cavity extends to form a cavity opening on the side of the second beam plate 211b. The cavity opening corresponds to the second reinforcing area 12b of the box cover 12. A drain hole 2114 communicating the cavity 2a with the liquid collecting cavity is also formed on the liquid collecting area 211c; The battery device 100 further includes a connecting member 23. The connecting member 23 includes a first connecting portion 231 and a second connecting portion 232 that are threadedly connected to each other along the first direction X. The end of the first connecting portion 231 is disposed in the insertion slot 111a of the reinforcing beam 111 and is welded to the side wall of the insertion slot 111a at the notch 1111a. One end where the first connecting portion 231 and the second connecting portion 232 are connected abuts against the box cover 12, and an annular sealing groove 2311 is formed corresponding to the second through hole 122. A sealing gasket 233 is disposed in the annular sealing groove 2311. The sealing gasket 233 seals and abuts against the box cover 12. The second connecting portion 232 passes through the second through hole 122 of the box cover 12 and the third through holes 2113 on the two beam plates 211. A pressing protrusion 2323 is formed on the circumferential side of the end of the second connecting portion 232 away from the first connecting portion 231. The pressing protrusion 2323 is 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 nest 241 is disposed in the cavity 2a of the beam body 21 corresponding to the pressing protrusion 2323. The through hole 2411 of the through hole nest 241 corresponds to the third through hole 2113.;

[0226] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling 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 A mounting beam, comprising a beam body and a mounting member, wherein the beam body is arranged on a side of the box cover away from the box body along the first direction and connected to the box body, and the mounting member is arranged in the middle of the beam body and located on a side of the box cover away from the box body, and the mounting member is used to be mounted on an electrical carrier; The beam body includes two beam plates opposite to each other along the first direction, and the peripheries of the two beam plates are provided with first overlaps, the first overlaps of the two beam plates are fixedly connected, and a cavity is jointly defined between the two, and the mounting member is at least partially disposed in the cavity. In the circumferential direction of the beam plates, the first overlaps have a drainage section, and the drainage sections of the two first overlaps are at least partially spaced apart and define a drainage channel, and the drainage channel connects the cavity.

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: 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 toward or away from the box cover.

7. The battery device according to claim 2, 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.

8. The battery device according to claim 7, characterized in that: The liquid discharge section is arranged to be recessed relative to its peripheral area and away from the box cover.

9. The battery device according to claim 2, characterized in that: The second beam plate is provided with a drainage hole at a position close to the box body.

10. The battery device according to claim 9, 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.

11. The battery device according to claim 10, 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.

12. The battery device according to any one of claims 1 to 11, 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.

13. The battery device according to claim 12, 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.

14. The battery device according to claim 12, 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.

15. The battery device according to claim 14, 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.

16. The battery device according to claim 14, 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.

17. The battery device according to claim 16, 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.

18. The battery device according to claim 17, characterized in that: One end of the first connecting portion welded to the side wall of the inserting slot is hollow.

19. The battery device according to claim 14, characterized in that: 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.

20. The battery device according to claim 19, 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.

21. The battery device according to claim 19, 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.

22. The battery device according to claim 19, wherein: 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.

23. The battery device according to claim 22, 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.

24. The battery device according to claim 12, wherein: 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.

25. The battery device according to any one of claims 1 to 11, 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.

26. The battery device according to claim 25, 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.

27. The battery device according to claim 26, 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.

28. An electric vehicle, characterized in that: Comprising a battery device as claimed in any one of claims 1 to 27.

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