Battery device and electric device

Abstract

The invention belongs to the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises a box body and a battery monomer; the box body comprises a box main body made of a non-metal material and a beam body connected with the box main body, the box main body comprises a main body plate and a protruding part, the protruding part is arranged in a protruding mode from the main body plate to one side of the main body plate in the height direction of the box body, and the battery monomers are supported on the main body plate; the beam body comprises a first sub-beam and a second sub-beam, the first sub-beam and the second sub-beam are arranged on the two opposite sides of the protruding part respectively, and the first sub-beam penetrates through the protruding part through a fixing structure and is fixedly connected with the second sub-beam. By arranging the protruding part on the main body plate, the structural strength of the main body plate can be improved, and the beam body is divided into the first sub-beam and the second sub-beam, so that the first sub-beam and the second sub-beam clamp the protruding part and are connected and fixed through the fixing structure, and the connecting strength of the beam body formed by the first sub-beam and the second sub-beam and the box main body is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and more particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In order to reduce the weight of the battery device, some battery devices often use non-metal to make part of the structure of the box body, such as using composite material to make the lower box body. However, due to the limitation of the material, the box body and the beam body are often connected by adhesive, resulting in relatively weak structural strength of the box body. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a battery device and a power utilization device to improve the problem that the box body made of non-metal material and the beam body are often connected by adhesive, resulting in relatively weak structural strength of the box body in the related art.

[0005] In a first aspect, the embodiments of the present application provide a battery device, comprising a box body having a containing space and a battery cell installed in the containing space; the box body comprises a box main body made of non-metal material and a beam body connected with the box main body, The box main body comprises a main body plate and a protruding portion connected with the main body plate, the protruding portion is protrudingly arranged from the main body plate along the height direction of the box body towards one side of the main body plate, and the battery cell is supported on the main body plate; The beam body comprises a first sub-beam and a second sub-beam, the extension directions of the first sub-beam and the second sub-beam are consistent, the first sub-beam and the second sub-beam are respectively arranged on opposite sides of the protruding portion, the first sub-beam is arranged on one side of the second sub-beam close to the main body plate along the height direction, and the first sub-beam is fixedly connected with the second sub-beam through a fixing structure passing through the protruding portion.

[0006] In the technical scheme of the embodiments of the present application, the protruding portion is arranged on the main body plate to increase the structural strength of the main body plate, the beam body is divided into the first sub-beam and the second sub-beam to make the first sub-beam and the second sub-beam clamp the protruding portion, and the first sub-beam and the second sub-beam are connected and fixed through the fixing structure, so as to improve the strength of the connection between the beam body formed by the first sub-beam and the second sub-beam and the box main body.

[0007] In some embodiments, the beam body comprises a limiting beam, the first sub-beam comprises a first limiting beam forming part of the structure of the limiting beam, the second sub-beam comprises a second limiting beam forming part of the structure of the limiting beam, the protruding portion comprises a first protruding portion connected with the main body plate, and the fixing structure comprises a first fixing structure fixedly connecting the first limiting beam and the second limiting beam through the first protruding portion.

[0008] By the above technical solution, the limiting beam is divided into a first limiting beam and a second limiting beam to be clamped with the first protruding part of the box body, and the first limiting beam and the second limiting beam are fixedly connected through the first fixing structure, so as to improve the connection strength of the limiting beam and the box body, and the maximum position of the acting torque of the battery monomer when the battery monomer is deformed is far away from the connection position of the limiting beam and the box body, so as to improve the anti-expansion performance of the box body.

[0009] In some embodiments, the first protruding part includes a first plate body and a second plate body, the first plate body is arranged on one side of the main plate in the height direction of the box body, and the second plate body is connected between the first plate body and the main plate, and the first limiting beam and the second limiting beam clamp the first plate body.

[0010] By the above technical solution, the first plate body is arranged to facilitate connection and fixation with the first limiting beam and the second limiting beam, and the second plate body is arranged to facilitate connection between the first plate body and the main plate; the first plate body and the second plate body form the first protruding part, which is simple in structure and easy to manufacture.

[0011] In some embodiments, one side of the first plate body close to the second limiting beam is provided with a positioning boss, and the second limiting beam is correspondingly provided with a positioning groove for positioning the boss; or, an end surface of the second limiting beam close to the first plate body is provided with a positioning boss, and the first plate body is correspondingly provided with a positioning groove for positioning the boss.

[0012] By the above technical solution, the positioning between the first plate body and the second limiting beam is facilitated, so as to facilitate installation of the second limiting beam and connection and fixation of the first limiting beam, the first plate body and the second limiting beam by the first fixing structure.

[0013] In some embodiments, in the thickness direction of the limiting beam, the positioning boss is located at the middle position of the second limiting beam, and the positioning groove is located at the middle position of the first plate body.

[0014] By the above technical solution, the positioning boss is arranged at the corresponding position of the middle of the second limiting beam, and the positioning groove is arranged at the corresponding position of the middle of the first plate body, so as to facilitate positioning of the second limiting beam and the first plate body in the thickness direction of the limiting beam and facilitate connection.

[0015] In some embodiments, the first limiting beam is adhesively connected with the first plate body; and / or, the first limiting beam is adhesively connected with the second plate body.

[0016] By the above technical solution, the first limiting beam is adhesively connected with the first plate body, so as to facilitate installation and fixation of the first limiting beam and facilitate connection with the second limiting beam.

[0017] By the technical scheme, the first limiting beam is connected with the second plate body by bonding, the installation and fixation of the first limiting beam are facilitated, the connection strength of the first limiting beam and the second plate body is improved, the connection strength of the first limiting beam and the box body is improved, the connection strength of the limiting beam and the box body is improved, and the anti-expansion performance is improved.

[0018] In some embodiments, the first plate body is provided with the second plate body on opposite sides thereof.

[0019] By the technical scheme, the first plate body is provided with the second plate body on opposite sides thereof, so that after the first limiting beam is installed, the second plate bodies on the two sides of the first plate body are respectively located on opposite sides of the first limiting beam, the first limiting beam can be stably supported, the connection strength of the first limiting beam and the box body is improved, the connection strength of the limiting beam and the box body is improved, and the second plate bodies on the two sides of the first limiting beam can cooperate to bear the expansion force of the battery monomer, so that the anti-expansion performance of the box body is improved.

[0020] In some embodiments, an opening is formed on the main plate at a position corresponding to the first protruding portion, and the first limiting beam protrudes from the main plate away from the second limiting beam through the opening.

[0021] By the technical scheme, the opening is arranged on the main plate, and the first limiting beam protrudes from the main plate away from the second limiting beam through the opening, so that the positioning and assembly of the first limiting beam are facilitated.

[0022] In some embodiments, the size of the opening is matched with the size of the first limiting beam in the thickness direction of the limiting beam.

[0023] By the technical scheme, the first limiting beam can be inserted from the opening to the first plate body in a direction, so as to facilitate the assembly of the first limiting beam.

[0024] In some embodiments, the box body comprises a protective plate arranged on a side of the main plate away from the first protruding portion, and the first limiting beam is arranged on the protective plate.

[0025] By the technical scheme, the protective plate is arranged, which can protect the main plate of the box body, reduce the direct impact of external impact on the main plate, and affect the safety of the battery monomer. At the same time, the existence of the protective plate also provides additional support for the first limiting beam, further enhances the overall structural stability of the box body, and improves the anti-expansion performance.

[0026] In some embodiments, the protective plate is connected with the first limiting beam by bonding.

[0027] By the technical scheme, the protective plate is connected with the first limiting beam by bonding, the first limiting beam can be better positioned and fixed, the connection strength is improved, and the structural strength of the box body is improved.

[0028] In some embodiments, the first fixing structure comprises a pull rivet, a flange is arranged on a circumferential side of a rivet sleeve of the pull rivet, and the first limiting beam is provided with an accommodation groove for accommodating the flange on an end face close to the second limiting beam.

[0029] By the above technical solution, the first fixing structure uses the pull rivet to connect the first limiting beam and the second limiting beam, which is convenient to connect and has high structural strength, so that the first limiting beam, the first plate body and the second limiting beam can be fixed closely, the accommodation groove is arranged on the first limiting beam to accommodate the flange, and the rivet sleeve of the pull rivet is convenient to assemble.

[0030] In some embodiments, the first limiting beam is provided with a first weight-reducing space extending along a length direction of the first limiting beam, and / or the second limiting beam is provided with a second weight-reducing space extending along a length direction of the second limiting beam.

[0031] By the above technical solution, the weight of the first limiting beam can be reduced, and the weight of the box body is further reduced; the first weight-reducing space extends along the length direction of the first limiting beam, so that the first limiting beam and the first weight-reducing space thereon are convenient to process and manufacture.

[0032] By the above technical solution, the weight of the second limiting beam can be reduced, and the weight of the box body is further reduced; the second weight-reducing space extends along the length direction of the second limiting beam, so that the second limiting beam and the second weight-reducing space thereon are convenient to process and manufacture.

[0033] In some embodiments, the beam body comprises a side beam, the first sub-beam comprises a first side beam forming a partial structure of the side beam, the second sub-beam comprises a second side beam forming a partial structure of the side beam, the protruding part comprises a second protruding part connected with an edge of the main plate, and the fixing structure comprises a second fixing structure fixedly connecting the first side beam and the second side beam through the second protruding part.

[0034] By the above technical solution, the side beam is divided into the first side beam and the second side beam to clamp the second protruding part connected with the edge of the main plate, and the first side beam and the second side beam are fixedly connected through the second fixing structure, so that the connection strength of the side beam and the box main body is improved, and the structural strength of the corresponding side edge of the box body is further improved.

[0035] In some embodiments, the second protruding part comprises a side plate and a flange, the side plate is connected with the edge of the main plate, the flange extends outward from a side of the side plate away from the main plate, and the first side beam and the second side beam clamp the flange.

[0036] By the above technical solution, the flange is arranged to facilitate connection and fixation with the first side beam and the second side beam, the side plate is arranged to facilitate connection of the flange with the main plate, and the side plate can also serve as part of the side wall of the box body; the flange and the side plate form the second protruding part, which has a simple structure and is convenient to manufacture.

[0037] In some embodiments, the box body includes a cover body having a rim connected with the flange, the rim extending between the first side beam and the second side beam, and the second fixing structure connecting the first side beam, the rim, the flange and the second side beam.

[0038] By the above technical solution, the rim of the cover body is tightly connected with the first side beam, the flange and the second side beam to form a stable overall structure, so as to firmly combine the cover body with the box body and the side beams, facilitate the assembly of the box body, and also realize the connection and fixation of the side beams.

[0039] In some embodiments, the battery device includes a heat management component installed in the box body.

[0040] By the above technical solution, the heat management component is provided to well manage the heat of the battery monomer, so as to provide a suitable working temperature for the battery monomer.

[0041] In some embodiments, the heat management component is installed on one side of the main plate close to the protruding part, and a channel for the flow of heat exchange liquid is arranged in the heat management component.

[0042] By the above technical solution, the heat management component can be supported by the main plate, and the channel is arranged in the heat management component for the flow of heat exchange liquid to realize liquid heat exchange, improve heat exchange efficiency, and better provide a good working temperature environment for the battery monomer.

[0043] In some embodiments, the box body is an integrally formed structure.

[0044] By the above technical solution, the processing and manufacturing of the box body can be facilitated, and the overall strength of the box body can be improved, thereby improving the structural strength of the box body.

[0045] In some embodiments, the box body is a basin-shaped structure.

[0046] By the above technical solution, the box body is provided in a basin-shaped structure, which can facilitate the manufacturing of the box body for accommodating the battery monomer, reduce the components for manufacturing the box body, and facilitate the assembly of the box body.

[0047] In some embodiments, the box body is a composite structure.

[0048] By the above technical solution, the box body uses a composite structure, which is light in weight, high in structural strength and good in durability.

[0049] In some embodiments, the box body includes a rim beam, the box body includes a side wall plate and a first extension part, the side wall plate is extended and arranged from an edge of the main plate toward a side where the protruding part is located, the first extension part is extended and arranged from an outer surface of the side wall plate toward a direction away from the accommodation space, and the rim beam is provided with a first accommodation space adapted to accommodate the first extension part.

[0050] By the above technical solution, the first extension part is arranged on the outer surface of the side wall plate, and the first accommodation space is arranged on the frame beam to accommodate the first extension part, which can increase the connection area of the frame beam and the first extension part, improve the stability of the connection, and thus improve the connection strength of the frame beam and the box body, and the first extension part can be well supported by the frame beam, and thus the box body is well supported, and the stability of the overall structure of the box body is improved.

[0051] In some embodiments, the box body includes a second extension part arranged on the side away from the side wall plate and extending towards the side away from the accommodation space from the first extension part, and the inner surface of the second extension part cooperates with the first extension part to form the accommodation space, the frame beam includes an outer side beam and an adapter beam, the adapter beam is arranged in the accommodation space, the side wall plate is arranged on the side of the first extension part close to the main body plate, and the first extension part and the second extension part cooperates to form a stepped part, the outer side beam has a stepped surface matched with the outer surface of the stepped part, and the stepped surface is connected to the stepped part by adhesion.

[0052] By the above technical solution, the accommodation space can be formed between the adapter beam and the outer side beam to accommodate the first extension part; in addition, the arrangement of the adapter beam can improve the strength of the position between the second extension part and the side wall plate; the adhesion design of the stepped surface of the outer side beam and the stepped part can increase the adhesion area of the outer side beam and the box body, and thus improve the connection strength of the outer side beam and the box body.

[0053] In a second aspect, the embodiments of the present application provide a power consumption device, which includes the battery device as described in the above embodiments, and the battery device is used to store or provide electric energy.

[0054] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following will describe the specific embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or exemplary technical description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any creative labor.

[0056] Figure 1 The structural schematic diagram of the vehicle of some embodiments of the present application; Figure 2 The exploded structural schematic diagram of the battery device of some embodiments of the present application; Figure 3This is a partial structural diagram of the box body according to some embodiments of this application; Figure 4 for Figure 3 A top view of part of the structure of the middle box; Figure 5 For along Figure 4 Schematic diagram of the cross-sectional structure along line AA; Figure 6 for Figure 5 A magnified structural diagram of section C; Figure 7 for Figure 6 Schematic diagram of the first limiting beam in the middle; Figure 8 for Figure 6 Schematic diagram of the second limiting beam in the middle; Figure 9 This is a schematic diagram of the connection between the limiting beam and the first protrusion in some other embodiments of this application; Figure 10 This is a schematic diagram of the connection between the limiting beam and the first protrusion in some embodiments of this application; Figure 11 This is a schematic diagram of the connection between the limiting beam and the first protrusion in some embodiments of this application; Figure 12 This is a top view of a portion of the structure of the housing in some other embodiments of this application; Figure 13 For along Figure 12 Schematic diagram of the cross-sectional structure of the middle DD line; Figure 14 for Figure 13 A magnified structural diagram of section E in the middle; Figure 15 This is a cross-sectional structural diagram showing the connection between the side beam and the second protrusion in other embodiments of this application; Figure 16 This is a cross-sectional structural schematic diagram of the box body according to some embodiments of this application; Figure 17 for Figure 16 A magnified structural diagram of section F in the middle; Figure 18 For along Figure 4 Schematic diagram of the cross-sectional structure of the middle BB line; Figure 19 for Figure 18 A magnified structural diagram of section G in the middle; Figure 20 This is a schematic diagram of the connection between the side beam and the box body in some embodiments of this application. Figure 1 ; Figure 21 This is a schematic diagram of the connection between the side beam and the box body in some embodiments of this application.Figure 2 ; Figure 22 Structure diagram of connection between frame beam and box body in some embodiments of the application Figure 3 ; Figure 23 Structure diagram of connection between frame beam and box body in some embodiments of the application Figure 4 ; Figure 24 Structure diagram of connection between frame beam and box body in some embodiments of the application Figure 5 .

[0057] In the drawings, the main marks are as follows: 11, vehicle; 111, controller; 112, motor; 200, battery device; 20, box body; 201, first box body; 202, second box body; 2001, containing space; 30, box body; 31, body plate; 310, opening; 311, receiving groove; 32, protruding part; 321, first protruding part; 3211, first plate body; 32110, positioning groove; 3212, second plate body; 322, second protruding part; 3221, side plate; 3222, flange; 330, containing space; 331, side wall plate; 332, first extension part; 333, second extension part; 334, folded part; 335, third extension part; 336, folded edge plate; 40, beam body; 41, limiting beam; 411, first limiting beam; 4110, first weight-reducing space; 4111, containing groove; 412, second limiting beam; 4120, second weight-reducing space; 4121, positioning boss; 42, edge beam; 421, first edge beam; 422, second edge beam; 50, fixing structure; 51, first fixing structure; 511, pull-rivet bolt; 5111, rivet sleeve; 51111, protruding edge; 5112, bolt; 51121, bolt head; 52, second fixing structure; 61, reinforcing beam; 62, cover body; 621, edge; 63, thermal management component; 631, channel; 64, guard plate; 70, frame beam; 701, first receiving space; 702, second receiving space; 703, weight-reducing cavity; 71, outer beam; 711, support part; 72, adaptive beam; 73, receiving part; 81, rivet; 300, battery monomer; X, first length direction; Y, first width direction; Z, height direction. DETAILED DESCRIPTION

[0058] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and are not intended to limit the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," "having" and "with" in the specification and claims herein are used to mean "including but not limited to"; the use of the terms "first," "second," "third," etc. are merely to distinguish one element from another, without necessarily implying a relative importance or a specific order.

[0060] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0061] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined in any suitable manner with other embodiments.

[0062] If not specifically stated, all embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0063] If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0064] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0065] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces). The meaning of "several" is one or more, unless otherwise explicitly specified.

[0066] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0068] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0069] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "adjacent" means close in position. For example, there are three components A1, A2 and B, the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, and B is also adjacent to A2. For example, when there are multiple C components, the multiple C components are C1, C2, …, C N , and B is adjacent to C2, and C2 is adjacent to B.

[0070] With the increasing application of battery devices, the demand for lightweight battery devices is also increasing, especially for mobile devices such as electric vehicles, ships, aircraft and other equipment, which require lightweight battery devices to reduce their load. Lightweight battery devices not only improve the endurance of the equipment, but also reduce energy consumption, and are more in line with the environmental protection trend.

[0071] In order to reduce the weight of the battery device and achieve lightweight of the battery device, some current battery devices use lightweight non-metal materials such as carbon fiber, glass fiber and the like to manufacture the box body of the battery device, such as using a non-metal box body, such as a basin body structure, as a lower box body or an upper box body of the box body, and connecting a beam body made of metal materials such as steel and aluminum alloy on the box body to increase the structural strength of the box body and facilitate the installation and use of the box body. However, due to the limitation of the material of the box body, the box body and the beam body are often connected by adhesion, resulting in relatively weak structural strength of the box body.

[0072] Based on the above considerations, in order to improve the problem that the box body made of non-metal materials and the beam body are often connected by adhesion, resulting in relatively weak structural strength of the box body, the embodiments of the present application provide a battery device, which divides the beam body into a first sub-beam and a second sub-beam in parallel, and sets a protruding portion on the main plate of the box body to increase the structural strength of the main plate, so that the first sub-beam and the second sub-beam clamp the protruding portion, and the first sub-beam, the protruding portion and the second sub-beam are fixedly connected by using a fixing structure, so that the formed beam body is firmly connected with the box body, thereby improving the strength of the connection between the beam body formed by the first sub-beam and the second sub-beam and the box body, and further improving the structural strength of the box body.

[0073] In the embodiments of the present application, the battery monomer can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging to continue to be used.

[0074] The battery monomer can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0075] The battery monomer usually contains a certain amount of gas. When the battery monomer is charged or discharged, the solution in the electrolyte will undergo gas generation or absorption reaction. The generation of these gases will cause the internal gas pressure of the battery monomer to rise, thereby causing the battery monomer to swell and deform. During the charging or discharging process of the battery monomer, the positive and negative electrode materials will undergo chemical reactions to form new compounds. These chemical reactions are accompanied by volume changes, which cause the volume of the materials inside the battery monomer to change, causing the battery to swell and deform. When the battery monomer is overcharged or overdischarged, it will cause the internal chemical reaction of the battery monomer to get out of control, generating too much gas or causing the structure of the electrode material to be destroyed, thereby causing the battery monomer to swell and deform. Charging or discharging the battery monomer in a high temperature environment will accelerate the internal chemical reaction, increase the generation of gas and the volume change. High temperature will also cause the internal substances of the battery monomer to swell, also causing the battery monomer to swell and deform.

[0076] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells, for example, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft including airplanes, rockets, space shuttles and spacecraft, etc.

[0077] For the convenience of description, an electric device is provided in an embodiment of the present application, which is described by taking a vehicle as an example.

[0078] Please refer to Figure 1 , Figure 1 A structural schematic diagram of a vehicle 11 is provided for some embodiments of the present application. The vehicle 11 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. The vehicle 11 is internally provided with a battery apparatus 200, which can be arranged at the bottom, head or tail of the vehicle 11. The battery apparatus 200 can be used for power supply of the vehicle 11, for example, the battery apparatus 200 can be used as an operating power source of the vehicle 11. The vehicle 11 can further include a controller 111 and a motor 112, and the controller 111 is used to control the battery apparatus 200 to supply power to the motor 112, for example, for the working power demand of the vehicle 11 during starting, navigation and driving.

[0079] In some embodiments, the battery apparatus 200 can not only be used as an operating power source of the vehicle 11, but also be used as a driving power source of the vehicle 11, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 11.

[0080] Please refer to Figure 2 , an embodiment of the present application provides a battery apparatus 200. The battery apparatus 200 can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 300 connected in series, parallel or mixed connection through a busbar component.

[0081] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells 300.

[0082] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells 300 into an independent module. As an example, the battery module can be formed by binding a plurality of battery cells 300 with a cable tie.

[0083] In some embodiments, the battery device 200 can be a battery pack, which includes a case 20 and one or more battery cell assemblies housed in the case 20.

[0084] As an example, the battery cell assembly can be a battery module, which can be housed in the case 20 by fixing the battery module in the case 20.

[0085] As an example, the battery cell assembly can also be housed in the case 20 by fixing a plurality of battery cells 300 directly to the case 20.

[0086] In some embodiments, the case 20 can include a first case 201 and a second case 202, which are coupled so that an enclosed space is formed inside the case 20 to accommodate the battery cells 300. Here, enclosed means covered or closed, which can be sealed or unsealed. The second case 202 can be a hollow structure with one end open, and the first case 201 can be a plate structure, which is coupled to the open side of the second case 202, and can be a top cover or a bottom plate of the case 20. The first case 201 can be a hollow structure with one end open, and the second case 202 can be a plate structure, which is coupled to the open side of the first case 201, and can be a top cover or a bottom plate of the case 20. The first case 201 and the second case 202 can also be hollow structures with one side open, and the open side of the first case 201 is coupled to the open side of the second case 202.

[0087] In some embodiments, the case 20 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to opposite sides of the frame, so that an enclosed space is formed inside the case 20 to accommodate the battery cells 300. The frame refers to a partial structure forming the peripheral side wall of the case 20, the top cover refers to a plate structure forming the top of the case 20, and the bottom plate refers to a plate structure forming the bottom of the case 20.

[0088] In some embodiments, the case 20 can be part of the chassis structure of a vehicle. For example, part of the case 20 can be at least part of the floor of the vehicle, or part of the case 20 can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0089] Please refer to Figure 2 , the case 20 has a length direction, a width direction, and a height direction, as shown by reference X in Figure 2 , the first length direction X, the first width direction Y, and the height direction Z. The first length direction X is the length direction of the case 20, the first width direction Y is the width direction of the case 20, and the height direction Z is the height direction of the case 20.

[0090] Referring to Figures 3 to 15 According to some embodiments of the present application, the battery device 200 comprises a box body 30 made of non-metallic material and a beam body 40 connected to the box body 30. The box body 30 comprises a main body plate 31 and a protruding portion 32 connected to the main body plate 31. The protruding portion 32 is protrudingly arranged on one side of the main body plate 31 along the height direction Z of the box body 20. The battery cell 300 is supported on the main body plate 31. The beam body 40 comprises a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam have the same extension direction. The first sub-beam and the second sub-beam are respectively arranged on opposite sides of the protruding portion 32. The first sub-beam is arranged on one side of the second sub-beam close to the main body plate 31 along the height direction Z. The first sub-beam is fixedly connected to the second sub-beam through the fixing structure 50 passing through the protruding portion 32.

[0091] The box body 20 refers to the container structure for accommodating the battery cell 300. The accommodation space 2001 refers to the space inside the box body 20 for installing the battery cell 300.

[0092] The battery cell 300 refers to the smallest unit for storing and releasing electric energy in the battery device 200. The battery cell 300 is installed in the accommodation space 2001 of the box body 20 and can be supported and protected by the box body 20.

[0093] The box body 30 refers to the structure made of non-metallic material for forming part of the structure of the box body 20. The box body 30 is made of non-metallic material, which is light in weight and strong in corrosion resistance, and can effectively improve the structural safety and durability of the box body 30. The non-metallic material can be made of plastic, composite material, etc. The composite material refers to a material composed of two or more different material components. The composite material is usually formed by combining resin and reinforcing material. The resin material is usually used as the base material, such as epoxy resin, polyester resin or vinyl ester resin, etc., to improve the adhesion and protection. The reinforcing material can use fiber material, particle material or sheet material, etc. to improve the strength and stiffness. The fiber material can be carbon fiber, glass fiber or aramid fiber, etc. The particle material can use silicon carbide particles, etc. The sheet material can use mica sheet, etc. The carbon fiber composite material, glass fiber composite material or aramid fiber composite material, etc. can be referred to as fiber composite material, which is usually wrapped with resin on the fiber, then woven into cloth or strips, and then hot-pressed into a corresponding shape of structural part. The box body 30 made of composite material is light in weight and strong in corrosion resistance. The box body 30 made of fiber composite material is light in weight, high in structural strength and strong in corrosion resistance.

[0094] The beam body 40 refers to a beam column structure for reinforcing the structural stability of the box body 20. The length and shape of the beam body 40 can be designed according to actual needs to adapt to the needs of battery devices 200 of different sizes. The beam body 40 can be made of metal materials such as steel, aluminum alloy, etc. Of course, in some embodiments, the beam body 40 can also be made of composite materials such as carbon fiber, glass fiber, etc. to further reduce weight and improve strength. As an example, the length direction of the beam body 40 can be consistent with the first length direction X. As an example, the length direction of the beam body 40 can be perpendicular to the first length direction X. As an example, the length direction of the beam body 40 can also be inclined to the first length direction X. It can be set according to the installation position and use demand of the beam body 40.

[0095] The first sub-beam refers to a beam column structure that forms a part of the beam body 40 along the height direction Z of the box body 20. The second sub-beam refers to a beam column structure that forms another part of the beam body 40 along the height direction Z of the box body 20. The first sub-beam and the second sub-beam extending direction consistent refers to the extending direction of the first sub-beam and the extending direction of the second sub-beam consistent. The first sub-beam and the second sub-beam are arranged along the height direction Z of the box body 20, and the first sub-beam and the second sub-beam are combined to form the corresponding beam body 40.

[0096] The main body plate 31 is the main part of the box main body 30, and the main body plate 31 is the structure of the main plate part constituting the top or bottom of the height direction Z of the box body 20.

[0097] The protruding part 32 refers to a part of the structure protruding along the height direction Z on the main body plate 31. The protruding part 32 is provided on the main body plate 31 to increase its structural strength. As an example, the protruding part 32 as a whole can be provided in a strip shape, and its length direction can be set consistent with the length direction of the beam body 40 to be well connected with the beam body 40. As an example, in the length direction of the beam body 40, the protruding part 32 can also be provided as multiple, and the size of each protruding part 32 in the length direction of the beam body 40 can be small, which can increase the connection points with the beam body 40 to be well connected with the beam body 40.

[0098] As an example, the protruding part 32 can be provided in a rectangular shape, or in an arc shape, a triangular shape, etc. along the cross section perpendicular to its length direction.

[0099] The battery monomer 300 supported on the main body plate 31 refers to that the battery monomer 300 can be directly installed on the main body plate 31 and supported by the main body plate 31; or the battery monomer 300 is indirectly installed on the main body plate 31 and indirectly supported by the main body plate 31, such as a cold plate or other components can be provided between the main body plate 31 and the battery monomer 300.

[0100] The first sub-beam and the second sub-beam are arranged on opposite sides of the protruding portion 32, that is, the first sub-beam and the second sub-beam are separated by the protruding portion 32.

[0101] The first sub-beam is arranged on one side of the second sub-beam close to the main plate 31 along the height direction Z, so as to determine the positions of the first sub-beam and the second sub-beam, and facilitate the installation and fixation of the first sub-beam and the second sub-beam.

[0102] In the case where the fixing structure 50 connects the first sub-beam and the second sub-beam, the first sub-beam and the second sub-beam clamp the protruding portion 32.

[0103] The fixing structure 50 refers to a structure connecting at least two objects. As an example, the fixing structure 50 can be a fastener such as a bolt, a rivet, a screw, a pin, and the like, which fixes and connects the first sub-beam, the protruding portion 32, and the second sub-beam through the fastener. As an example, the fixing structure 50 can also be a buckle provided on the first sub-beam, and a clamping hole is correspondingly provided on the second sub-beam, the buckle passes through the protruding portion 32, and is clamped into the clamping hole to achieve the fixation and connection of the first sub-beam, the protruding portion 32, and the second sub-beam. As an example, the fixing structure 50 can also be a buckle provided on the second sub-beam, and a clamping hole is correspondingly provided on the first sub-beam, the buckle passes through the protruding portion 32, and is clamped into the clamping hole to achieve the fixation and connection of the first sub-beam, the protruding portion 32, and the second sub-beam.

[0104] In the technical scheme of the embodiment, the protruding portion 32 is arranged on the main plate 31 to increase the structural strength of the main plate 31, the beam body 40 is divided into the first sub-beam and the second sub-beam, the first sub-beam and the second sub-beam clamp the protruding portion 32, and the first sub-beam and the second sub-beam are connected and fixed by the fixing structure 50, thereby improving the connection strength between the beam body 40 formed by the first sub-beam and the second sub-beam and the box main body 30.

[0105] In some embodiments, referring to Figures 3 to 10 , the beam body 40 includes a limiting beam 41, the first sub-beam includes a first limiting beam 411 forming part of the structure of the limiting beam 41, the second sub-beam includes a second limiting beam 412 forming part of the structure of the limiting beam 41, the protruding portion 32 includes a first protruding portion 321 connected with the main plate 31, and the fixing structure 50 includes a first fixing structure 51 fixedly connecting the first limiting beam 411 and the second limiting beam 412 through the first protruding portion 321.

[0106] The limiting beam 41 refers to the beam body 40 in the box body 20 used to resist the battery monomer 300 to limit the swelling and deformation of the battery monomer 300.

[0107] The first limiting beam 411 refers to a beam column structure forming a part of the structure of the limiting beam 41 along the height direction Z of the box body 20. Correspondingly, the first limiting beam 411 forms a first sub-beam corresponding to the beam body 40. The second limiting beam 412 refers to a beam column structure forming another part of the structure of the limiting beam 41 along the height direction Z of the box body 20. Correspondingly, the second limiting beam 412 forms a second sub-beam corresponding to the beam body 40. The extension direction of the first limiting beam 411 is consistent with the extension direction of the second limiting beam 412. The first limiting beam 411 and the second limiting beam 412 are arranged along the height direction Z of the box body 20, and are combined to form the corresponding limiting beam 41.

[0108] The first protruding part 321 refers to a protruding part connected with the limiting beam 41.

[0109] The first fixed structure 51 refers to a fixed structure connecting the first limiting beam 411, the first protruding part 321, and the second limiting beam 412. As an example, the first fixed structure 51 can be a fastener such as a bolt, a rivet, a screw, a pin, or the like, which fixedly connects the first limiting beam 411, the first protruding part 321, and the second limiting beam 412.

[0110] The first fixed structure 51 fixedly connects the first limiting beam 411 and the second limiting beam 412 through the first protruding part 321, thereby fixedly connecting the first limiting beam 411, the first protruding part 321, and the second limiting beam 412, forming a complete limiting beam 41, connecting the limiting beam 41 with the main body plate 31, and installing the limiting beam 41 in the box main body 30, thereby improving the connection strength between the limiting beam 41 and the box main body 30.

[0111] Due to the swelling and deformation of the battery monomer 300, the battery monomer 300 will abut against one side of the limiting beam 41, thereby generating a torque on the limiting beam 41 away from the side of the battery monomer 300. The torque on the limiting beam 41 is the largest at the position close to the main body plate 31. The first protruding part 321 provided on the main body plate 31 can increase the structural strength of the main body plate 31. The first limiting beam 411 and the second limiting beam 412 clamp the first protruding part 321 and are fixedly connected through the first fixed structure 51, which can move the connection position of the limiting beam 41 and the box main body 30 away from the main body plate 31, thereby avoiding the position of the largest torque on the limiting beam 41 due to the swelling of the battery monomer 300, and making the connection between the limiting beam 41 and the box main body 30 less likely to loosen or be damaged, thereby improving the anti-swelling performance.

[0112] By the technical scheme, the limiting beam 41 is divided into the first limiting beam 411 and the second limiting beam 412 to be clamped with the first protruding part 321 of the box body 30, and is fixedly connected through the first fixing structure 51, so that the connecting strength of the limiting beam 41 and the box body 30 is improved, the maximum position of the acting moment of the battery monomer 300 on the limiting beam 41 is far away from the connecting position of the limiting beam 41 and the box body 30 when the battery monomer 300 is deformed by swelling, and the anti-swelling performance of the box body 20 is improved.

[0113] In some embodiments, referring to Figures 5 to 10 , the first protruding part 321 comprises a first plate body 3211 and a second plate body 3212, the first plate body 3211 is arranged on one side of the main body plate 31 along the height direction Z of the box body 20, and the second plate body 3212 is connected between the first plate body 3211 and the main body plate 31, and the first limiting beam 411 and the second limiting beam 412 are matched to clamp the first plate body 3211.

[0114] The first plate body 3211 refers to a part of structure on the protruding part 32 between the first limiting beam 411 and the second limiting beam 412. The second plate body 3212 refers to a part of structure on the protruding part 32 connecting the first plate body 3211 and the main body plate 31.

[0115] By the technical scheme, the first plate body 3211 is arranged to facilitate connection and fixation with the first limiting beam 411 and the second limiting beam 412, the second plate body 3212 is arranged to facilitate connection of the first plate body 3211 and the main body plate 31, the first plate body 3211 and the second plate body 3212 form the first protruding part 321, the structure is simple and convenient for manufacturing, and in addition, the second plate body 3212 can directly resist the battery monomer 300 to improve the anti-swelling performance.

[0116] In some embodiments, referring to Figure 11 , the first fixing structure 51 can also be a buckle arranged on the first limiting beam 411, the buckle passes through the first protruding part 321 to be clamped on the corresponding second limiting beam 412 to realize fixed connection of the first limiting beam 411, the first protruding part 321 and the second limiting beam 412, the structure is simple and convenient for assembly. In some embodiments, the first fixing structure 51 can also be a buckle arranged on the second limiting beam 412, the buckle passes through the first protruding part 321 to be clamped on the corresponding first limiting beam 411 to realize fixed connection of the first limiting beam 411, the first protruding part 321 and the second limiting beam 412.

[0117] In some embodiments, referring to Figures 6 to 8 , the second limiting beam 412 is provided with a positioning boss 4121 on the end face close to the first plate body 3211, and the first plate body 3211 is correspondingly provided with a positioning groove 32110 for the positioning boss 4121 to be matched and placed into.

[0118] The positioning boss 4121 refers to a boss structure provided on a structural member. The positioning boss 4121 can be provided in a strip shape, a column shape, or a block shape, and can be provided as needed.

[0119] The positioning boss 4121 is provided on the end face of the second limiting beam 412 close to the first plate body 3211. The positioning boss 4121 is provided on the end face of the second limiting beam 412, and is located on the end face of the second limiting beam 412 close to the first plate body 3211.

[0120] The positioning recess 32110 refers to a recess structure provided on a structural member.

[0121] The positioning recess 32110 is provided on the first plate body 3211, and the shape and size of the positioning recess 32110 are matched with the shape and size of the positioning boss 4121, so that the positioning boss 4121 can be accurately placed in the positioning recess 32110, so as to accurately position the second limiting beam 412 and the first plate body 3211, so as to assemble and fix the second limiting beam 412.

[0122] Through the above technical solution, the positioning between the first plate body 3211 and the second limiting beam 412 is facilitated, the installation of the second limiting beam 412 is facilitated, and the first limiting beam 411, the first plate body 3211, and the second limiting beam 412 are connected and fixed by the first fixing structure 51.

[0123] In some embodiments, the positioning boss 4121 can be provided on one side of the first plate body 3211 close to the second limiting beam 412, and the positioning recess 32110 for the positioning boss 4121 is provided on the second limiting beam 412.

[0124] The positioning boss 4121 is provided on the end face of the first plate body 3211 close to the second limiting beam 412. The positioning boss 4121 is provided on the end face of the first plate body 3211, and is located on the side of the first plate body 3211 close to the second limiting beam 412.

[0125] The positioning recess 32110 is provided on the end face of the second limiting beam 412 close to the first plate body 3211. The positioning recess 32110 is provided on the end face of the second limiting beam 412, and is located on the end face of the second limiting beam 412 close to the first plate body 3211. Moreover, the shape and size of the positioning recess 32110 are matched with the shape and size of the positioning boss 4121, so that the positioning boss 4121 can be accurately placed in the positioning recess 32110, so as to accurately position the second limiting beam 412 and the first plate body 3211, so as to assemble and fix the second limiting beam 412.

[0126] In some embodiments, referring to Figures 6 to 8 , along the thickness direction of the limiting beam 41, the positioning boss 4121 is located at the middle position of the second limiting beam 412, and the positioning groove 32110 is located at the middle position of the first plate body 3211.

[0127] The thickness direction of the limiting beam 41 refers to the direction perpendicular to the length direction of the limiting beam 41 and perpendicular to the height direction Z of the box body 20.

[0128] Along the thickness direction of the limiting beam 41, the positioning boss 4121 is located at the middle position of the second limiting beam 412, and the positioning groove 32110 is located at the middle position of the first plate body 3211, which means that the positioning boss 4121 and the positioning groove 32110 are located at the middle of the second limiting beam 412 along the thickness direction of the limiting beam 41, and also at the middle of the first plate body 3211 along the thickness direction of the limiting beam 41.

[0129] By the above technical solution, the positioning boss 4121 is arranged at the corresponding position of the middle of the second limiting beam 412, the positioning groove 32110 is arranged at the corresponding position of the middle of the first plate body 3211, and the positioning boss 4121 is arranged in the positioning groove 32110. The second limiting beam 412 and the first plate body 3211 can be positioned along the thickness direction of the limiting beam 41, which facilitates the positioning of the second limiting beam 412 and the first plate body 3211 along the thickness direction of the limiting beam 41 and facilitates connection.

[0130] In some embodiments, referring to Figures 6 to 11 , the first limiting beam 411 is adhesively connected to the first protruding portion 321.

[0131] The first limiting beam 411 is adhesively connected to the first protruding portion 321, which means that the first limiting beam 411 is connected to the first protruding portion 321 by an adhesive to improve the connection strength of the first limiting beam 411 and the first protruding portion 321. In addition, during assembly, the first limiting beam 411 can also be positioned to facilitate the assembly of the first limiting beam 411. The first limiting beam 411 can be integrally adhesively connected to the first protruding portion 321, or can be adhesively connected to part of the first protruding portion 321.

[0132] The first limiting beam 411 can be adhesively connected to the first protruding portion 321 by a double-sided adhesive, a structural adhesive, a curing adhesive, or the like.

[0133] In some embodiments, referring to Figures 6 to 10 , the first limiting beam 411 is adhesively connected to the first plate body 3211.

[0134] The first limiting beam 411 is connected to the first plate body 3211 by adhesion, that is, one end of the first limiting beam 411 close to the first plate body 3211 is connected to the corresponding side of the first plate body 3211 by an adhesive, so as to improve the connection strength of the first limiting beam 411 and the first plate body 3211, and the first limiting beam 411 can be positioned during assembly, facilitating the assembly of the first limiting beam 411.

[0135] The first limiting beam 411 can be connected to the first plate body 3211 by adhesion of double-sided adhesive tape, structural adhesive, curing adhesive, etc.

[0136] Through the above technical solution, the first limiting beam 411 is connected to the first plate body 3211 by adhesion, facilitating the installation and fixation of the first limiting beam 411 and the connection with the second limiting beam 412.

[0137] In some embodiments, referring to Figures 6 to 10 , the first limiting beam 411 is connected to the second plate body 3212 by adhesion.

[0138] The first limiting beam 411 is connected to the second plate body 3212 by adhesion, that is, the side of the first limiting beam 411 close to the second plate body 3212 is connected to the corresponding side of the second plate body 3212 by an adhesive, so as to improve the connection strength of the first limiting beam 411 and the second plate body 3212, and the first limiting beam 411 can be positioned during assembly, facilitating the assembly of the first limiting beam 411.

[0139] The first limiting beam 411 can be connected to the second plate body 3212 by adhesion of double-sided adhesive tape, structural adhesive, curing adhesive, etc.

[0140] Through the above technical solution, the first limiting beam 411 is connected to the second plate body 3212 by adhesion, facilitating the installation and fixation of the first limiting beam 411, improving the connection strength of the first limiting beam 411 and the second plate body 3212, improving the connection strength of the first limiting beam 411 and the box body 30, further improving the connection strength of the limiting beam 41 and the box body 30, and improving the anti-expansion performance.

[0141] In some embodiments, only the first limiting beam 411 can be connected to the first plate body 3211 by adhesion. In an embodiment, only the first limiting beam 411 can be connected to the second plate body 3212 by adhesion. In some embodiments, the first limiting beam 411 can be connected to both the first plate body 3211 and the second plate body 3212 by adhesion.

[0142] In some embodiments, referring to Figure 2 , Figure 3 , Figure 6 , Figure 9 and Figure 10The second plate body 3212 is arranged on one side of the first limiting beam 411 close to the battery monomer 300.

[0143] The side of the first limiting beam 411 close to the battery monomer 300 refers to the side with the smallest distance between the first limiting beam 411 and the battery monomer 300 when the battery monomer 300 is installed on the main body plate 31.

[0144] According to the above technical solution, the second plate body 3212 is arranged on the side of the first limiting beam 411 close to the battery monomer 300, so that when the battery monomer 300 is installed on the main body plate 31, the second plate body 3212 can resist the adjacent part of the battery monomer 300, and cooperate with the first limiting beam 411 and the second limiting beam 412 to limit the expansion deformation of the battery monomer 300, thereby improving the anti-expansion performance.

[0145] In some embodiments, referring to Figure 2 , Figure 3 , Figure 6 and Figure 9 , the opposite sides of the first plate body 3211 are respectively provided with the second plate body 3212.

[0146] The opposite sides of the first plate body 3211 are respectively provided with the second plate body 3212, which means that along the thickness direction of the limiting beam 41, the opposite sides of the first plate body 3211 are respectively provided with the second plate body 3212, that is, the opposite sides of the first plate body 3211 are connected to the main body plate 31 through the second plate body 3212, which can better support the first plate body 3211 and improve the structural strength of the box main body 30.

[0147] According to the above technical solution, the opposite sides of the first plate body 3211 are respectively provided with the second plate body 3212, so that after the first limiting beam 411 is installed, the second plate bodies 3212 on the two sides of the first plate body 3211 are respectively located on the opposite sides of the first limiting beam 411, which can stably support the first limiting beam 411 and improve the connection strength between the first limiting beam 411 and the box main body 30, thereby improving the connection strength between the limiting beam 41 and the box main body 30. Moreover, the second plate bodies 3212 on the two sides of the first limiting beam 411 can cooperate to bear the expansion force of the battery monomer 300, thereby improving the anti-expansion performance of the box body 20.

[0148] In some embodiments, referring to Figure 10 , the second plate body 3212 can also be arranged on only one side of the first plate body 3211, that is, one side of the first plate body 3211 is connected to the main body plate 31 through the second plate body 3212. As an example, the second plate body 3212 can be arranged on only the side of the first plate body 3211 close to the battery monomer 300. As an example, the second plate body 3212 can also be arranged on only the side of the first plate body 3211 away from the battery monomer 300.

[0149] In some embodiments, referring to Figure 6 , Figure 9 and Figure 10 , the body plate 31 is provided with an opening 310 at a position corresponding to the first protruding portion 321, and the first limiting beam 411 protrudes from the body plate 31 through the opening 310 away from the second limiting beam 412.

[0150] The opening 310 refers to a through hole structure provided on the body plate 31. The body plate 31 is provided with the opening 310 at a position corresponding to the first protruding portion 321, which means that the opening 310 is located on the body plate 31 and in the area covered by the first protruding portion 321. The shape and size of the opening 310 can be set according to the size and shape of the first limiting beam 411.

[0151] The first limiting beam 411 protrudes from the body plate 31 through the opening 310 away from the second limiting beam 412, which means that the side of the first limiting beam 411 away from the second limiting beam 412 extends to the side of the body plate 31 away from the first plate body 3211 through the opening 310, so that the first limiting beam 411 can be positioned through the opening 310, and the size of the first limiting beam 411 in the height direction Z can be increased to improve the structural strength of the first limiting beam 411.

[0152] Through the above technical solution, the opening 310 is provided on the body plate 31, and the first limiting beam 411 protrudes from the body plate 31 through the opening 310 away from the second limiting beam 412, which can facilitate the positioning and assembly of the first limiting beam 411.

[0153] In some embodiments, referring to Figure 6 , Figure 9 and Figure 10 , the size of the opening 310 in the thickness direction of the limiting beam 41 is adapted to the size of the first limiting beam 411.

[0154] The size of the opening 310 in the thickness direction of the limiting beam 41 refers to the width dimension of the opening 310.

[0155] The size of the first limiting beam 411 in the thickness direction of the limiting beam 41 refers to the thickness dimension of the first limiting beam 411.

[0156] Through the above technical solution, the first limiting beam 411 can be inserted from the opening 310 to the direction of the first protruding portion 321, so as to facilitate the assembly of the first limiting beam 411, and the first limiting beam 411 can be positioned in the thickness direction of the limiting beam 41 through the side wall of the opening 310.

[0157] In some embodiments, the first limiting beam 411 can also not be provided with the opening 310 on the main body plate 31, and is directly supported on the main body plate 31. As an example, when the box body 30 is made, the first limiting beam 411 can also be directly embedded into the space formed by the main body plate 31, the second plate body 3212 and the first plate body 3211. As an example, when the box body 30 is made, the first limiting beam 411 can also be directly embedded into the space formed between the main body plate 31 and the first protruding part 321.

[0158] In some embodiments, referring to Figures 3 to 10 , the box body 20 comprises a protective plate 64 provided on the side of the main body plate 31 away from the first protruding part 321, and the first limiting beam 411 is arranged on the protective plate 64.

[0159] The protective plate 64 refers to a plate member that protects the side of the main body plate 31 away from the first protruding part 321. The protective plate 64 can be made of metal materials such as steel and aluminum alloy, or can be made of composite materials such as carbon fiber and glass fiber.

[0160] The first limiting beam 411 arranged on the protective plate 64 means that the end of the first limiting beam 411 away from the second limiting beam 412 is in contact or abutment with the protective plate 64.

[0161] Through the above technical solution, the protective plate 64 is provided, which can well protect the main body plate 31 of the box body 20, reduce the direct effect of external impact on the main body plate 31, and affect the safety of the battery monomer 300. At the same time, the existence of the protective plate 64 also provides additional support for the first limiting beam 411, further enhances the overall structural stability of the box body 20, and improves the anti-expansion performance.

[0162] In some embodiments, the protective plate 64 is arranged in a spaced manner with the main body plate 31, and in the case that the box body 20 is subjected to external impact, the protective plate 64 can have a larger deformation amount to reduce the impact on the main body plate 31, thereby effectively buffering the external force and protecting the safety of the main body plate 31 and the battery monomer 300.

[0163] In some embodiments, the protective plate 64 is connected to the first limiting beam 411 by adhesion.

[0164] The protective plate 64 and the first limiting beam 411 are connected by adhesion, which means that the end face of the end of the protective plate 64 and the first limiting beam 411 away from the second limiting beam 412 is connected by an adhesive to improve the connection strength between the first limiting beam 411 and the protective plate 64.

[0165] The first limiting beam 411 can be connected to the protective plate 64 by adhesion of double-sided adhesive, structural adhesive, curing adhesive, etc.

[0166] By using the above technical solution, the guard plate 64 can be bonded to the first limiting beam 411, which can better position and fix the first limiting beam 411, improve the connection strength, and thus improve the structural strength of the box 20.

[0167] In some embodiments, please refer to Figures 6 to 10 The first fixing structure 51 includes a rivet bolt 511, and the rivet sleeve 5111 of the rivet bolt 511 has a protruding flange 51111 on its periphery. The end face of the first limiting beam 411 near the second limiting beam 412 has a receiving groove 4111 for receiving the protruding flange 51111.

[0168] A rivet bolt 511 typically includes a bolt 5112 and a rivet sleeve 5111. One end of the bolt 5112 extends into the rivet sleeve 5111, and the other end of the bolt 5112 has a bolt head 51121. The rivet sleeve 5111 has a protruding flange 51111 on its periphery near the bolt head 51121. Under unidirectional tensile force, the bolt 5112 is stretched and the rivet sleeve 5111 is pushed, causing the rivet sleeve 5111 to deform and the rivet sleeve 5111 and bolt 5112 to engage, generating a permanent fastening force.

[0169] The protruding edge 51111 refers to the structure on the periphery of the rivet sleeve 5111 that protrudes outward along the radial direction of the bolt 5112. The receiving groove 4111 refers to the pre-set groove structure on the end face of the first limiting beam 411 near the second limiting beam 412, which is used to receive the protruding edge 51111.

[0170] During connection, the rivet sleeve 5111 extends into the second limiting beam 412. The bolt 5112 pulls the rivet sleeve 5111 outwards, causing it to deform. The protruding edge 51111 then embeds into the receiving groove 4111, allowing the deformed portion of the rivet sleeve 5111 to engage with the protruding edge 51111 to clamp the corresponding wall of the second limiting beam 412 and the first protrusion 321, thus fixing the corresponding wall of the second limiting beam 412 and the first protrusion 321 together. Additionally, when locking the bolt 5112, the bolt head 51121 of the bolt 5112 can also engage with the protruding edge 51111 to clamp the corresponding wall of the first limiting beam 411, thereby fixing the first limiting beam 411, the first protrusion 321, and the second limiting beam 412 together.

[0171] Through the above technical solution, the first fixing structure 51 uses rivet bolts 511 to connect the first limiting beam 411 and the second limiting beam 412, which is convenient to connect and has structural strength. It can easily fix the first limiting beam 411, the first protrusion 321 and the second limiting beam 412 tightly. A receiving groove 4111 is provided on the first limiting beam 411 to receive the protruding edge 51111, which facilitates the assembly of the rivet sleeve 5111 of the rivet bolt 511.

[0172] In some embodiments, the rivet sleeve 5111 can sequentially pass through the wall panel of the first limiting beam 411 near the second limiting beam 412, the first protrusion 321, and the wall panel of the second limiting beam 412 near the first limiting beam 411. The bolt 5112 pulls the rivet sleeve 5111 to expand and deform outward, so that the expanded and deformed part of the rivet sleeve 5111 cooperates with the protrusion edge 51111 to clamp the wall panel of the first limiting beam 411 near the second limiting beam 412, the first protrusion 321, and the wall panel of the second limiting beam 412 near the first limiting beam 411, thereby connecting and fixing the first limiting beam 411, the first protrusion 321, and the second limiting beam 412.

[0173] In some embodiments, the first fixing structure 51 may also be a bolt, rivet or other structure to connect and fix the first limiting beam 411, the first protrusion 321 and the second limiting beam 412.

[0174] In some embodiments, please refer to Figures 6 to 10 The first limiting beam 411 is provided with a first weight reduction space 4110, which extends along the length of the first limiting beam 411.

[0175] The first weight-reduction space 4110 refers to the cavity structure provided on the first limiting beam 411 to reduce the weight of the first limiting beam 411. As an example, the first weight-reduction space 4110 can be a hole structure or a groove structure provided on the first limiting beam 411.

[0176] The first weight-reduction space 4110 extends along the length of the first limiting beam 411, and the volume of the first weight-reduction space 4110 can be made larger to better reduce the weight of the first limiting beam 411.

[0177] In some embodiments, the first limiting beam 411 may be a profile structure for easy processing and manufacturing, and also facilitates the formation of a first weight reduction space 4110 in the first limiting beam 411.

[0178] The above technical solution can reduce the weight of the first limiting beam 411, thereby reducing the weight of the box body 20; and the first weight reduction space 4110 extends along the length of the first limiting beam 411, which can facilitate the processing and manufacturing of the first limiting beam 411 and the first weight reduction space 4110 thereon.

[0179] In some embodiments, the first limiting beam 411 may be a cast structure on which the first weight-reduction space 4110 is machined. In some embodiments, the first limiting beam 411 may also be made using a rolling structure to form the first weight-reduction space 4110 therein. In some embodiments, the first limiting beam 411 may also be made using a forging structure.

[0180] In some embodiments, please refer to Figures 6 to 10 The second limiting beam 412 is provided with a second weight reduction space 4120, which extends along the length of the second limiting beam 412.

[0181] The second weight-reduction space 4120 refers to the cavity structure provided on the second limiting beam 412 to reduce the weight of the second limiting beam 412. As an example, the second weight-reduction space 4120 can be a hole structure or a groove structure provided on the second limiting beam 412.

[0182] The second weight-reduction space 4120 extends along the length of the second limiting beam 412, and the volume of the second weight-reduction space 4120 can be made larger to better reduce the weight of the second limiting beam 412.

[0183] In some embodiments, the second limiting beam 412 may be a profile structure for easy processing and manufacturing, and also facilitates the formation of a second weight reduction space 4120 in the second limiting beam 412.

[0184] The above technical solution can reduce the weight of the second limiting beam 412, thereby reducing the weight of the box body 20; and the second weight reduction space 4120 extends along the length of the second limiting beam 412, which can facilitate the processing and manufacturing of the second limiting beam 412 and the second weight reduction space 4120 thereon.

[0185] In some embodiments, the second limiting beam 412 may be a cast structure on which the second weight-reduction space 4120 is machined. In some embodiments, the second limiting beam 412 may also be made using a roll forming structure to form the second weight-reduction space 4120 therein. In some embodiments, the second limiting beam 412 may also be made using a forging structure.

[0186] In some embodiments, a first weight-reduction space 4110 may be provided only in the first limiting beam 411. In some embodiments, a second weight-reduction space 4120 may be provided only in the second limiting beam 412. In some embodiments, a first weight-reduction space 4110 may be provided in the first limiting beam 411, and a second weight-reduction space 4120 may be provided in the second limiting beam 412.

[0187] In some embodiments, the box body 20 may be provided with one or more limiting beams 41. When multiple limiting beams 41 are provided, they can be arranged in parallel. Of course, adjacent limiting beams 41 can also be arranged at an angle; the specific arrangement can be determined as needed. "Multiple" refers to two or more beams.

[0188] In some embodiments, please refer to Figure 2 and Figure 3The box-shaped enclosure 20 includes reinforcing beams 61, which are installed inside the enclosure 20 to enhance structural stability. The reinforcing beams 61 are beam-column structures installed inside the enclosure 20 to increase structural strength. The reinforcing beams 61 can be made of various materials, such as metal or composite materials, selected according to actual needs.

[0189] In some embodiments, the length direction of the reinforcing beam 61 may be aligned with the first length direction X. In some embodiments, the length direction of the reinforcing beam 61 may be perpendicular to the first length direction X. In some embodiments, the length direction of the reinforcing beam 61 may also be inclined to the first length direction X.

[0190] In some embodiments, please refer to Figures 12 to 15 The beam body 40 includes a side beam 42, a first sub-beam including a first side beam 421 forming part of the structure of the side beam 42, a second sub-beam including a second side beam 422 forming part of the structure of the side beam 42, a protrusion 32 including a second protrusion 322, the second protrusion 322 being connected to the edge of the main body plate 31, and a fixing structure 50 including a second fixing structure 52, the second fixing structure 52 passing through the second protrusion 322 to fix the first side beam 421 and the second side beam 422.

[0191] The edge beam 42 refers to the beam 40 located at the outer edge of the box 20. The edge beam 42 enhances the structural strength and deformation resistance of the box 20's edge. For example, an edge beam 42 can be provided on one side of the box 20. Alternatively, edge beams 42 can be provided on opposite sides of the box 20. Another example is the provision of edge beams 42 on all sides of the box 20. Yet another example is the placement of edge beams 42 on several adjacent sides of the box 20.

[0192] The first side beam 421 refers to a beam-column structure that forms part of the side beam 42 along the height Z direction of the box 20. Correspondingly, the first side beam 421 forms the first sub-beam of the corresponding beam 40. The second side beam 422 refers to a beam-column structure that forms another part of the side beam 42 along the height Z direction of the box 20. Correspondingly, the second side beam 422 forms the second sub-beam of the corresponding beam 40. The extension direction of the first side beam 421 is consistent with the extension direction of the second side beam 422. The first side beam 421 and the second side beam 422 are arranged along the height Z direction of the box 20, and are combined to form the corresponding side beam 42.

[0193] The second protrusion 322 refers to the protrusion that connects to the side beam 42.

[0194] The second fixing structure 52 refers to the fixing structure that connects the first side beam 421, the second protrusion 322, and the second side beam 422. As an example, the second fixing structure 52 can be a fastener, such as a bolt, rivet, screw, pin, or other structural component, through which the first side beam 421, the second protrusion 322, and the second side beam 422 are fixedly connected.

[0195] The second fixing structure 52 passes through the second protrusion 322 and fixes the first side beam 421 and the second side beam 422, thereby fixing the first side beam 421, the second protrusion 322 and the second side beam 422 together to form a complete side beam 42, and connects the side beam 42 to the main plate 31 to connect the side beam 42 to the box body 30, thereby improving the connection strength.

[0196] Through the above technical solution, the side beam 42 is divided into a first side beam 421 and a second side beam 422 to clamp the second protrusion 322 at the edge of the main body plate 31, and is fixedly connected by the second fixing structure 52 to improve the connection strength between the side beam 42 and the box body 30, thereby improving the structural strength of the corresponding side of the box 20.

[0197] In some embodiments, please refer to Figures 12 to 14 The second protrusion 322 includes a side plate 3221 and a flange 3222. The side plate 3221 is connected to the edge of the main plate 31. The flange 3222 extends outward from the side of the side plate 3221 away from the main plate 31. The first side beam 421 and the second side beam 422 cooperate to clamp the flange 3222.

[0198] The flange 3222 is a part of the second protrusion 322, and specifically refers to a portion of the second protrusion 322 located between the first side beam 421 and the second side beam 422. The side plate 3221 is a part of the second protrusion 322, and specifically refers to a portion of the second protrusion 322 connecting the flange 3222 and the main body plate 31.

[0199] The second fixed structure 52 connects the first side beam 421, the flange 3222 and the second side beam 422 to form a complete side beam 42, so that the side beam 42 can be fixed to the box body 30, thereby improving the structural strength of the box body 20 and achieving a stable connection between the side beam 42 and the box body 30.

[0200] Through the above technical solution, a flange 3222 is provided to facilitate connection and fixation with the first side beam 421 and the second side beam 422. A side plate 3221 is provided to facilitate connection of the flange 3222 to the main body plate 31, and it can also serve as part of the side wall of the box 20. The flange 3222 and the side plate 3221 form a second protrusion 322, which has a simple structure and is easy to manufacture.

[0201] In some embodiments, please refer to Figure 16 andFigure 17 The box body 20 includes a cover 62, which has an edge 621 connected to a flange 3222. The edge 621 extends between the first side beam 421 and the second side beam 422, and the second fixing structure 52 connects the first side beam 421, the edge 621, the flange 3222 and the second side beam 422.

[0202] The cover 62 refers to the shell structure on the side of the housing 20 opposite to the main body plate 31 of the housing body 30. The cover 62 and the housing body 30 combine to form the main part of the housing 20 and enclose the internal space of the housing 20 to accommodate the battery cells 300. The cover 62 can be made of metal materials such as steel and aluminum alloy, or non-metallic materials such as carbon fiber and glass fiber. The cover 62 can be designed as a plate structure. Of course, the cover 62 can also be designed as a hollow structure with one end open, depending on the specific design requirements.

[0203] As an example, the cover 62 can also be configured to have the same structure as the box body 30.

[0204] Edge 621 refers to the area of ​​the edge portion of the cover 62. When the cover 62 is a hollow structure with one end open, edge 621 can be a structure formed by folding one end of the cover 62 outward.

[0205] Through the above technical solution, the edge 621 of the cover 62 is tightly connected with the first side beam 421, the flange 3222 and the second side beam 422 to form a stable overall structure, so as to firmly combine the cover 62 with the box body 30 and the side beam 42, which facilitates the assembly of the box 20 and can also realize the connection and fixation of the side beam 42.

[0206] In some embodiments, please refer to Figure 2 , Figure 16 and Figure 17 The main body 30 can serve as the first box 201 of the box 20, while the lid 62 can serve as the second box 202 of the box 20. Of course, the main body 30 can also serve as the second box 202 of the box 20, and correspondingly, the lid 62 serves as the first box 201 of the box 20.

[0207] In some embodiments, please refer to Figure 11 The second fixing structure 52 can also be a buckle disposed on the first side beam 421. The buckle passes through the second protrusion 322 and is engaged with the corresponding second side beam 422, thereby achieving a fixed connection between the first side beam 421, the second protrusion 322, and the second side beam 422. The structure is simple and easy to assemble. In some embodiments, the second fixing structure 52 can also be a buckle disposed on the second side beam 422. The buckle passes through the second protrusion 322 and is engaged with the corresponding first side beam 421, thereby achieving a fixed connection between the first side beam 421, the second protrusion 322, and the second side beam 422.

[0208] In some embodiments, the second protrusion 322 may be configured in the shape of an arc, triangle or other shapes along its cross-section perpendicular to its length direction, and correspondingly, the side beam 42 may serve as the corresponding side wall of the box 20.

[0209] In some embodiments, please refer to Figure 3 and Figure 4 The battery device 200 includes a thermal management component 63, which is installed in the housing 20.

[0210] Thermal management component 63 refers to a component that can exchange heat with the external environment to control the internal temperature of the enclosure 20. Thermal management component 63 can be a conductor-type refrigeration device, heating device, cold plate, heat pipe, or other structures.

[0211] By using the above technical solution, the thermal management component 63 can effectively manage the thermal of the battery cell 300, thereby providing a suitable operating temperature for the battery cell 300.

[0212] In some embodiments, please refer to Figure 3 and Figure 19 The thermal management component 63 is installed on the side of the main plate 31 near the protrusion 32, and the thermal management component 63 is provided with a channel 631 for the flow of heat exchange fluid.

[0213] The thermal management component 63 is installed on the side of the main plate 31 near the protrusion 32. That is, the thermal management component 63 is installed on the inner surface of the main plate 31, and the inner surface of the main plate 31 refers to the surface of the main plate 31 near the receiving space 2001 inside the housing 20 where the battery cell 300 is housed.

[0214] Channel 631 refers to a cavity structure within the thermal management component 63 that allows for the flow of liquid. The thermal management component 63 has a channel 631 for the flow of heat exchange fluid, allowing the fluid to exchange heat with the interior of the housing 20 and improve heat exchange efficiency. As an example, the thermal management component 63 can be a coil, a cold plate with an internal channel 631, or other structures.

[0215] Through the above technical solution, the thermal management component 63 can be supported by the main plate 31, and the thermal management component 63 is provided with a channel 631 for the heat exchange fluid to flow, so as to realize liquid heat exchange, improve heat exchange efficiency, and better provide a good working temperature environment for the battery cell 300.

[0216] In some embodiments, please refer to Figures 3 to 6 The main body of the box is a one-piece molded structure.

[0217] The main body 30 of the box is a one-piece molded structure, that is, the parts of the main body 30 are one-piece molded, such as the main body plate 31 and the protrusion 32 are one-piece molded structures, so that the main body plate 31 and the protrusion 32 can be connected and fixed, improving the connection strength and facilitating processing and manufacturing.

[0218] As an example, when the first protrusion 321 includes a first plate 3211 and a second plate 3212, the main plate 31, the first plate 3211 and the second plate 3212 are integrally formed structures.

[0219] As an example, when the second protrusion 322 includes a flange 3222 and a side plate 3221, the main body plate 31, the flange 3222 and the side plate 3221 are integrally formed structures.

[0220] The above technical solution facilitates the processing and manufacturing of the main body 30, and improves the overall strength of the main body 30, thereby enhancing the structural strength of the box 20.

[0221] In some embodiments, the main body plate 31 and the first protrusion 321 can be manufactured separately, and then the main body plate 31 and the first protrusion 321 can be fixedly connected by bonding, welding, using fasteners or other structures.

[0222] In some embodiments, the first plate 3211 and the second plate 3212 can be manufactured separately, and then the first plate 3211 and the second plate 3212 can be fixedly connected by bonding, welding, using fasteners or other structures.

[0223] In some embodiments, the main body plate 31 and the second protrusion 322 can be manufactured separately, and then the main body plate 31 and the second protrusion 322 can be fixedly connected by bonding, welding, using fasteners or other structures.

[0224] In some embodiments, the flange 3222 and the side plate 3221 can be manufactured separately, and then the flange 3222 and the side plate 3221 can be fixedly connected by bonding, welding, or using fasteners.

[0225] In some embodiments, the box body 30 has a basin-shaped structure.

[0226] A basin-shaped structure refers to a structure that resembles the shape of a basin. The main body 30 is designed in a basin shape, so that the main plate 31 of the main body 30 can serve as the bottom of the basin-shaped structure, while the side plates 3221 at the edge can serve as the side walls of the basin-shaped structure.

[0227] Through the above technical solution, the main body 30 is set in a basin-shaped structure, which can be easily made into a box 20 for accommodating battery cells 300, reducing the number of parts to be made in the box 20 and facilitating the assembly of the box 20.

[0228] In some embodiments, if the edge of the main body plate 31 of the box body 30 is not provided with side plates 3221, a frame can be used to connect to the edge of the main body plate 31, so that the frame serves as the side wall structure of the box body 20.

[0229] In some embodiments, side plates 3221 may be provided on one or several sides of the main body plate 31, while the other sides are connected to beam and column structures, so that the whole structure forms a hollow structure with one end open.

[0230] In some embodiments, when the box body 30 includes a side panel 3221, the side panel 3221 may serve as at least a portion of the side wall structure of the box body 20.

[0231] In some embodiments, when the side of the housing 20 is provided with a side beam 42, the side beam 42 can also serve as a mounting beam for the housing 20. A mounting beam is a beam structure used to connect external devices using the battery device 200 to support the battery device 200 on those devices.

[0232] In some embodiments, the box body 30 is a composite material structure.

[0233] Composite structures refer to box structures made of composite materials.

[0234] Through the above technical solution, the main body 30 of the box uses a composite material structure, which is lightweight, has high structural strength, and is durable.

[0235] In some embodiments, the box body 30 is made of fiber composite material, which is lightweight, has high structural strength, and is highly corrosion resistant.

[0236] In some embodiments, please refer to Figure 2 , Figure 4 , Figures 18 to 24 The box body 20 includes a frame beam 70, and the box body 30 includes a side wall panel 331 and a first extension 332. The side wall panel 331 extends from the edge of the main body panel 31 toward the side where the protrusion 32 is located. The first extension 332 extends from the outer surface of the side wall panel 331 in a direction away from the receiving space 2001. The frame beam 70 is provided with a first receiving space 701 adapted to accommodate the first extension 332.

[0237] The frame beam 70 refers to a beam-column structure located on the outer edge of the box 20, which can serve as part of the frame of the box 20. The frame beam 70 enhances the structural strength and deformation resistance of the box 20's edge. For example, a frame beam 70 can be provided on one side of the box 20. Alternatively, frame beams 70 can be provided on opposite sides of the box 20. Another example is that frame beams 70 can be provided on all sides of the box 20. Yet another example is that frame beams 70 can be provided on several adjacent sides of the box 20. The frame beam 70 can be made of metal materials such as steel or aluminum alloy. Of course, in some embodiments, the frame beam 70 can also be made of composite materials such as carbon fiber or glass fiber to further reduce weight and increase strength.

[0238] Side wall panel 331 refers to a portion of the panel structure in the main body 30 that is connected to the edge of the main body panel 31 and protrudes from the edge of the main body panel 31 toward the side where the protrusion 32 is located. Side wall panel 331 can serve as part of the side wall structure of the box body 20.

[0239] In some embodiments, the main body plate 31 and the side wall plate 331 can be integrally formed to ensure a firm connection between them and facilitate manufacturing. In some embodiments, the main body plate 31 and the side wall plate 331 can be manufactured separately and then fixedly connected by means of bonding, welding, or using a fixing structure 50.

[0240] The outer surface of the side wall panel 331 refers to the surface of the side wall panel 331 that is away from the internal accommodating space 2001 of the box 20.

[0241] The first extension 332 refers to a structure extending from the outer surface of the side wall panel 331 toward the side away from the receiving space 2001. Providing the first extension 332 on the outer surface of the side wall panel 331 stabilizes the side wall panel 331 and increases structural strength. For example, please refer to... Figure 18 The first extension 332 can be a plate-like structure. See [example image / reference needed] for an example. Figure 23 The first extension 332 can also be a groove-shaped structure, such as a structure formed by a portion of the sidewall panel 331 being recessed outwards. The groove-shaped structure of the first extension 332 facilitates processing and manufacturing.

[0242] In some embodiments, the first extension 332 and the side wall panel 331 may be integrally formed to ensure a secure connection between them and facilitate manufacturing. In some embodiments, the first extension 332 and the side wall panel 331 may be manufactured separately and then fixedly connected by means of bonding, welding, or using a fixing structure 50.

[0243] The first receiving space 701 refers to the space provided on the side frame beam 70. During assembly, the first extension 332 can be placed in the first receiving space 701. By providing the first receiving space 701 to accommodate the first extension 332, the connection area between the side frame beam 70 and the box body 30 can be increased, thereby improving the connection strength between the side frame beam 70 and the box body 30.

[0244] By using the above technical solution, a first extension 332 is provided on the outer surface of the side wall panel 331, and a first receiving space 701 is provided on the frame beam 70 to receive the first extension 332. This can increase the connection area between the frame beam 70 and the first extension 332, improve the stability of the connection, thereby improving the connection strength between the frame beam 70 and the box body 30. Moreover, the frame beam 70 can effectively support the first extension 332, thereby effectively supporting the box body 30 and improving the overall structural stability of the box 20.

[0245] In some embodiments, when the side of the housing 20 is provided with a side frame beam 70, the side frame beam 70 can also serve as a mounting beam for the housing 20. A mounting beam is a beam structure used to connect external devices using the battery device 200 to support the battery device 200 on those devices.

[0246] In some embodiments, the frame beam 70 is provided with a weight-reducing cavity 703. The weight-reducing cavity 703 refers to a cavity structure provided on the frame beam 70 to reduce the weight of the frame beam 70. As an example, the weight-reducing cavity 703 can be a hole structure or a groove structure provided on the frame beam 70.

[0247] In some embodiments, the weight reduction cavity 703 extends along the length direction of the side frame beam 70.

[0248] The weight-reducing cavity 703 extends along the length of the frame beam 70, which allows the volume of the weight-reducing cavity 703 to be made larger, so as to better reduce the weight of the frame beam 70.

[0249] In some embodiments, the frame beam 70 may be a profile structure for easy processing and manufacturing, and also facilitates the formation of a weight-reducing cavity 703 in the frame beam 70.

[0250] The above technical solution can reduce the weight of the side beam 70, thereby reducing the weight of the box 20; and the weight reduction cavity 703 extends along the length of the side beam 70, which can facilitate the processing and manufacturing of the side beam 70 and the weight reduction cavity 703 on it.

[0251] In some embodiments, the frame beam 70 may be a cast structure on which the weight-reducing cavity 703 is machined. In some embodiments, the frame beam 70 may also be made using a rolling structure to form the weight-reducing cavity 703 therein. In some embodiments, the frame beam 70 may also be made using a forging structure.

[0252] In some embodiments, please refer to Figure 19 and Figure 20 The main body 30 includes a second extension 333, which extends from the side of the first extension 332 away from the side wall panel 331 toward the side away from the receiving space 2001. The inner surface of the second extension 333 cooperates with the first extension 332 to form a receiving space 330. The frame beam 70 includes an outer beam 71 and an adapter beam 72, which is placed in the receiving space 330. The side wall panel 331, the first extension 332, and the second extension 333 cooperate to form a stepped portion on the side of the first extension 332 near the main body panel 31. The outer beam 71 has a stepped surface that is adapted to the outer surface of the stepped portion, and the stepped surface is bonded to the stepped portion.

[0253] The second extension 333 refers to a plate-shaped component structure that extends from the first extension 332 in a direction away from the main body plate 31. The second extension 333 provided on the first extension 332 can stabilize the first extension 332, increase the structural strength, and form a stepped structure.

[0254] In some embodiments, the first extension 332 and the second extension 333 may be integrally formed to ensure a secure connection between them and facilitate manufacturing. In some embodiments, the first extension 332 and the second extension 333 may be manufactured separately and then connected by means of bonding, welding, or using a fixing structure 50.

[0255] The inner surface of the second extension 333 refers to the surface of the second extension 333 on the side closest to the side wall plate 331.

[0256] The inner surface of the second extension 333 and the first extension 332 cooperate to form an accommodating space 330. This means that the second extension 333 can be combined with the first extension 332 to form a stepped structure, so that the inner surface of the second extension 333 and the side of the first extension 332 away from the main body plate 31 can form an accommodating space 330.

[0257] The outer beam 71 refers to the portion of the beam-column structure located on the side of the outer surface of the side wall panel 331 and the outer surface of the second extension 333 in the frame beam 70. The outer surface of the second extension 333 refers to the surface on the second extension 333 that is opposite to the inner surface of the second extension 333.

[0258] The adapter beam 72 refers to a portion of the frame beam 70 that is adapted to the accommodating space 330 so that it can be installed in the accommodating space 330.

[0259] The frame beam 70 includes an outer beam 71 and an adapter beam 72, meaning that the outer beam 71 and the adapter beam 72 combine to form the frame beam 70. A first receiving space 701 is formed between the outer beam 71 and the adapter beam 72.

[0260] The side wall panel 331 forms a stepped portion with the first extension 332 on the side near the main body panel 31, and the first extension 332 and the second extension 333 together. In other words, the structure formed by the combination of the first extension 332 and the second extension 333 on the side wall panel 331 near the main body panel 31 is stepped.

[0261] The stepped surface refers to the surface provided on the outer beam 71, and this surface is the surface of the outer beam 71 on the side close to the box body 30.

[0262] The outer beam 71 has a stepped surface that matches the outer surface of the stepped portion, meaning that the shape of the stepped surface on the outer beam 71 matches the shape of the stepped portion. The stepped surface is bonded to the stepped portion, which allows for a larger bonding area between the outer beam 71 and the box body 30, resulting in a higher connection strength.

[0263] The stepped surface can be bonded to the step section using adhesives such as double-sided tape, structural adhesive, and curing adhesive.

[0264] Through the above technical solution, an accommodating space 330 can be formed between the adapter beam 72 and the outer beam 71 to accommodate the first extension 332; in addition, the setting of the adapter beam 72 can improve the strength of the position between the second extension 333 and the side wall panel 331; the bonding design of the stepped surface and the stepped portion of the outer beam 71 can increase the bonding area between the outer beam 71 and the box body 30, thereby improving the connection strength between the outer beam 71 and the box body 30.

[0265] In some embodiments, the outer beam 71 may be a profile structure for easy fabrication. In some embodiments, the outer beam 71 may be a cast structure. In some embodiments, the outer beam 71 may also be made using a rolled structure. In some embodiments, the outer beam 71 may also be made using a forged structure.

[0266] In some embodiments, the adapter beam 72 may be a profile structure for easy fabrication. In some embodiments, the adapter beam 72 may be a cast structure. In some embodiments, the adapter beam 72 may also be made using a rolled structure. In some embodiments, the adapter beam 72 may also be made using a forged structure.

[0267] In some embodiments, please refer to Figures 19 to 22 The main body 30 of the box includes a folding part 334, which extends outward from the side of the second extension 333 away from the first extension 332. The outer beam 71 is provided with a support part 711 that is adapted to and connected to the folding part 334.

[0268] The folded portion 334 refers to a plate-shaped component structure extending from the second extension 333 in a direction away from the side wall panel 331. The folded portion 334 provided on the second extension 333 can stabilize the second extension 333, increase structural strength, and form a stepped structure.

[0269] In some embodiments, the folding portion 334 and the second extension portion 333 may be integrally formed to ensure a secure connection between them and facilitate manufacturing. In some embodiments, the folding portion 334 and the second extension portion 333 may be manufactured separately and then fixedly connected by means of bonding, welding, or using a fixing structure 50.

[0270] The support portion 711 refers to the structural part on the outer beam 71 that contacts the folded portion 334. By providing the support portion 711 on the outer beam 71 to connect with the folded portion 334, the connection area can be increased, thereby improving the structural strength of the connection.

[0271] Through the above technical solution, the folding part 334 can facilitate the connection between the box body 30 and the cover 62 of the box body 20, and can also improve the strength of the box body 30. In addition, the outer beam 71 is provided with a support part 711 to connect with the folding part 334, which can increase the connection area between the outer beam 71 and the box body 30, thereby improving the connection strength between the side beam 70 and the box body 30.

[0272] In some embodiments, the folding portion 334 can be bonded to the support portion 711 using adhesives such as double-sided tape, structural adhesive, or curing adhesive, making the connection convenient.

[0273] In some embodiments, the folding portion 334 may also be connected to the support portion 711 by a fixing structure 50 such as bolts or rivets.

[0274] In some embodiments, please refer to Figures 19 to 22 The second extension 333 is riveted to the outer beam 71.

[0275] The second extension 333 is riveted to the outer beam 71, meaning that the second extension 333 is fixedly connected to the side wall of the outer beam 71 adjacent to the second extension 333 by means of rivets 81.

[0276] The above technical solution can improve the connection strength and stability between the second extension 333 and the outer beam 71, enhance vibration resistance, and effectively reduce the risk of loosening of the connection between the second extension 333 and the outer beam 71.

[0277] In some embodiments, the second extension 333 and the outer beam 71 may also be connected by fasteners such as bolts or locks.

[0278] In some embodiments, please refer to Figure 19 and Figure 20 The adapter beam 72 is bonded to the inner surface of the accommodating space 330.

[0279] The bonding connection between the adapter beam 72 and the inner surface of the accommodating space 330 means that the adapter beam 72 is fixedly connected to the inner surface of the accommodating space 330 by adhesives such as double-sided adhesive, structural adhesive, and curing adhesive.

[0280] The above technical solution facilitates the assembly and fixing of the beam 72, thereby improving the connection strength between the frame beam 70 and the box body 30, and enhancing the overall structural strength of the box body 20.

[0281] In some embodiments, the adapter beam 72 can be fixedly connected to the first extension 332 via the fixing structure 50.

[0282] In some embodiments, the adapter beam 72 can be fixedly connected to the second extension 333 via the fixing structure 50.

[0283] In some embodiments, please refer to Figure 19 and Figure 21 The first extension 332 is located in the middle region of the side wall plate 331 along the height direction Z.

[0284] The middle region of the side wall panel 331 along the height direction Z refers to the part of the side wall panel 331 after removing the two ends along the height direction Z, and also refers to the part of the side wall panel 331 between the two ends along the height direction Z.

[0285] The first extension 332 is located in the middle region of the side wall panel 331 along the height direction Z. That is, a portion of the side wall panel 331 protrudes from the first extension 332 along the height direction Z on the side opposite to the main body panel 31.

[0286] The first extension 332 is located in the middle region of the side wall panel 331 along the height direction Z, and the strength of the side wall panel 331 can be better enhanced by the first extension 332.

[0287] By using the above technical solution, the first extension 332 is set in the middle region, which enhances the structural strength of the side wall panel 331, allows the first extension 332 to better support the side wall panel 331, and can also set the height of the side wall panel 331 higher, so that the space formed in the main body 30 can have a greater depth to accommodate the battery cell 300, which facilitates the assembly of the battery cell 300. The side wall panel 331 can also better support the side of the battery cell 300, and improve the anti-expansion performance of the box 20.

[0288] In some embodiments, when the first extension 332 is provided with a second extension 333, the first extension 332 is located in the middle region of the side wall plate 331 along the height direction Z. Then, the portion of the side wall plate 331 away from the main body plate 31 in the first extension 332 can serve as a side wall of the accommodating space 330 to better position the adapter beam 72.

[0289] In some embodiments, please refer to Figure 21 and Figure 22 The first extension 332 is located in the middle region of the side wall panel 331 along the height direction Z. The side wall panel 331 extends outward from the side opposite to the main body panel 31 with a folded edge plate 336. Correspondingly, the side of the frame beam 70 opposite to the main body panel 31 is adapted to connect with the folded edge plate 336. Then, the frame beam 70 only needs to provide a first receiving space 701 on the side near the side wall panel 331, which can simplify the structure.

[0290] In some embodiments, please refer to Figure 22 and Figure 24 The main body 30 includes a third extension 335, which extends outward from the outer surface of the side wall panel 331. The third extension 335 is located on the side of the first extension 332 near the main body panel 31. A second receiving space 702 adapted to accommodate the third extension 335 is provided on the frame beam 70.

[0291] The third extension 335 refers to a structure extending from the outer surface of the side wall panel 331 in a direction away from the receiving space 2001. Providing the third extension 335 on the outer surface of the side wall panel 331 stabilizes the side wall panel 331 and increases structural strength. For example, please refer to... Figure 22 The third extension 335 can be a plate-like structure. See, for example... Figure 24 The third extension 335 can also be a groove-shaped structure, such as a structure formed by a portion of the side wall panel 331 being recessed outwards. The groove-shaped structure of the third extension 335 facilitates processing and manufacturing.

[0292] In some embodiments, the third extension 335 and the side wall panel 331 may be integrally formed to ensure a secure connection between the third extension 335 and the side wall panel 331 and facilitate manufacturing. In some embodiments, the third extension 335 and the side wall panel 331 may be manufactured separately and then fixedly connected by means of bonding, welding, or using a fixing structure 50.

[0293] The third extension 335 is located on the side of the first extension 332 that is close to the main body plate 31. In other words, the side wall plate 331 protrudes from the third extension 335 on the side away from the main body plate 31.

[0294] The second receiving space 702 refers to the space provided on the side frame beam 70. During assembly, the third extension 335 can be placed in the second receiving space 702. By providing the second receiving space 702 to accommodate the third extension 335, the connection area between the side frame beam 70 and the box body 30 can be increased, thereby improving the connection strength between the side frame beam 70 and the box body 30.

[0295] Through the above technical solution, the setting of the third extension 335 can not only improve the structural strength of the part where the side wall panel 331 is located and better support the side wall panel 331, but also the setting of the second receiving space 702 on the frame beam 70 can further increase the connection area between the box body 30 and the frame beam 70 and enhance the connection strength between the frame beam 70 and the box body 30.

[0296] In some embodiments, the third extension 335 may be provided as one to facilitate manufacturing. In some embodiments, the third extension 335 may also be provided as multiple third extensions 335, and the multiple third extensions 335 are spaced apart along the height direction Z to increase the connection area between the box body 30 and the side beam 70 and enhance the connection strength between the side beam 70 and the box body 30. Multiple refers to two or more.

[0297] In some embodiments, the third extension 335 can be fixedly connected to the inner surface of the second receiving space 702 by adhesives such as double-sided tape, structural adhesive, and curing adhesive, so as to fix the connection and improve the connection strength between the frame beam 70 and the box body 30.

[0298] In some embodiments, please refer to Figure 19 , Figure 20 and Figure 22 The frame beam 70 extends toward the main body plate 31 and is provided with a receiving part 73, which is connected to the side of the main body plate 31 away from the protrusion 32.

[0299] The receiving part 73 refers to the part of the frame beam 70 that protrudes and extends towards the main body plate 31.

[0300] The side of the main plate 31 that faces away from the protrusion 32 refers to the side of the main plate 31 that faces away from the space in the housing 20 used to accommodate the battery cell 300.

[0301] The connection between the receiving part 73 and the side of the main plate 31 opposite to the protrusion 32 means that the receiving part 73 and the side of the main plate 31 opposite to the protrusion 32 can be fixedly connected by means of bonding, welding, snap-fitting, or using a fixing structure 50.

[0302] By using the above technical solution, a receiving part 73 is set up and connected to the main body plate 31, which increases the connection area between the side beam 70 and the box body 30, improves the connection strength between the side beam 70 and the box body 30, and can better support the main body plate 31.

[0303] In some embodiments, the receiving part 73 can be bonded to the main body plate 31 by adhesives such as double-sided tape, structural adhesive, and curing adhesive, which makes the connection convenient.

[0304] In some embodiments, the main body plate 31 can also be connected to the main body plate 31 by a fixing structure 50 such as bolts or rivets.

[0305] In some embodiments, please refer to Figure 19 , Figure 20 and Figure 22 The main plate 31 is recessed with a receiving groove 311 on the side of the protrusion 32 corresponding to the position of the receiving part 73, and the receiving part 73 is placed in the receiving groove 311.

[0306] The receiving groove 311 refers to the groove structure provided on the main body plate 31.

[0307] The fact that the main body plate 31 is recessed with a receiving groove 311 on the side of the protrusion 32 corresponding to the receiving part 73 means that the receiving groove 311 on the main body plate 31 is located at the position corresponding to the receiving part 73. In other words, the receiving groove 311 is located on the side of the main body near the side frame beam 70, and it is a groove structure formed by the main body recessing into the box 20.

[0308] By providing the above technical solution, a receiving groove 311 is provided on the main body plate 31 to accommodate the receiving part 73, which facilitates the installation and fixing of the receiving part 73. Moreover, providing a receiving groove 311 on the main body plate 31 can also improve the structural strength of the main body plate 31.

[0309] According to some embodiments of this application, this application provides a battery device 200, including a housing 20 having a receiving space 2001 and a battery cell 300 installed in the receiving space 2001; the housing 20 includes a housing body 30 made of non-metallic material and a beam 40 connected to the housing body 30. The housing body 30 includes a main plate 31 and a protrusion 32 connected to the main plate 31. The protrusion 32 protrudes from the main plate 31 along the height direction Z of the housing 20 toward the main plate 31; the beam 40 includes a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam extend in the same direction. The first sub-beam and the second sub-beam are respectively located on opposite sides of the protrusion 32. The first sub-beam is located along the height direction Z on the side of the second sub-beam closer to the main plate 31. The first sub-beam is fixedly connected to the second sub-beam through the protrusion 32 by a fixing structure 50. The beam 40 includes a limiting beam 41, a first sub-beam including a first limiting beam 411 forming part of the structure of the limiting beam 41, a second sub-beam including a second limiting beam 412 forming part of the structure of the limiting beam 41, a protrusion 32 including a first protrusion 321, the first protrusion 321 including a first plate 3211 and a second plate 3212, the second plate 3212 connecting the first plate 3211 and the main plate 31, the first limiting beam 411 and the second limiting beam 412 cooperate to clamp the first plate 3211, and the first fixing structure 51 passes through the first plate 3211 to fix and connect the first limiting beam 411 and the second limiting beam 412.

[0310] The limiting beam 41 is divided into a first limiting beam 411 and a second limiting beam 412, which are clamped to the first plate 3211 of the box body 30 and fixedly connected by the first fixing structure 51 to improve the connection strength between the limiting beam 41 and the box body 30, thereby improving the anti-expansion performance of the box body 20.

[0311] According to some embodiments of this application, this application also provides an electrical device, including a battery device 200 as described in the above embodiments, the battery device 200 being used to store or provide electrical energy.

[0312] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, It includes a housing with a receiving space and individual battery cells installed in the receiving space; the housing includes a main body made of non-metallic material and a beam connected to the main body. The main body of the box includes a main plate and a protrusion connected to the main plate. The protrusion is provided by the main plate protruding towards one side of the main plate along the height direction of the box. The battery cell is supported on the main plate. The beam includes a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam extend in the same direction. The first sub-beam and the second sub-beam are respectively located on opposite sides of the protrusion. The first sub-beam is located on the side of the second sub-beam closer to the main plate along the height direction. The first sub-beam passes through the protrusion and is fixedly connected to the second sub-beam by a fixing structure. The beam body includes a limiting beam, the first sub-beam includes a first limiting beam forming part of the structure of the limiting beam, the second sub-beam includes a second limiting beam forming part of the structure of the limiting beam, the protrusion includes a first protrusion connected to the main plate, and the fixing structure includes a first fixing structure that passes through the first protrusion and fixes the first limiting beam and the second limiting beam.

2. The battery device as claimed in claim 1, characterized in that, The first limiting beam has a first weight-reduction space that extends along the length of the first limiting beam; and / or, the second limiting beam has a second weight-reduction space that extends along the length of the second limiting beam.

3. The battery device as described in any one of claims 1-2, characterized in that, The first limiting beam is a profile structure; and / or, the second limiting beam is a profile structure.

4. The battery device according to any one of claims 1-3, characterized in that, The first protrusion includes a first plate and a second plate. The first plate is disposed on one side of the main plate along the height direction of the box. The second plate connects the first plate and the main plate. The first limiting beam and the second limiting beam cooperate to clamp the first plate.

5. The battery device as claimed in claim 4, characterized in that, The first plate has a positioning boss on one side near the second limiting beam, and the second limiting beam has a corresponding positioning groove for the positioning boss to be inserted; or, the second limiting beam has a positioning boss on the end face near the first plate, and the first plate has a corresponding positioning groove for the positioning boss to be inserted.

6. The battery device as claimed in claim 5, characterized in that, Along the thickness direction of the limiting beam, the positioning boss is located at the middle position of the second limiting beam, and the positioning groove is located at the middle position of the first plate.

7. The battery device according to any one of claims 4-6, characterized in that, The first limiting beam is bonded to the first plate; and / or, the first limiting beam is bonded to the second plate.

8. The battery device according to any one of claims 4-7, characterized in that, The second plate is provided on each of the opposite sides of the first plate.

9. The battery device according to any one of claims 1-8, characterized in that, An opening is provided on the main body plate corresponding to the position of the first protrusion, and the first limiting beam protrudes from the main body plate through the opening to the side away from the second limiting beam.

10. The battery device as claimed in claim 9, characterized in that, Along the thickness direction of the limiting beam, the size of the opening is adapted to the size of the first limiting beam.

11. The battery device as claimed in claim 10 or 11, characterized in that, The housing includes a protective plate disposed on the side of the main body plate opposite to the first protrusion, and the first limiting beam is placed on the protective plate.

12. The battery device as claimed in claim 11, characterized in that, The protective plate is bonded to the first limiting beam.

13. The battery device according to any one of claims 1-12, characterized in that, The first fixing structure includes a rivet bolt, the rivet bolt sleeve is provided with a protruding flange on its periphery, and the end face of the first limiting beam near the second limiting beam is provided with a receiving groove for accommodating the protruding flange.

14. The battery device according to any one of claims 1-13, characterized in that, The beam body includes a side beam, the first sub-beam includes a first side beam forming part of the structure of the side beam, the second sub-beam includes a second side beam forming part of the structure of the side beam, the protrusion includes a second protrusion, the second protrusion is connected to the edge of the main plate, and the fixing structure includes a second fixing structure, the second fixing structure passes through the second protrusion and fixes the first side beam and the second side beam.

15. The battery device as claimed in claim 14, characterized in that, The second protrusion includes a side plate and a flange. The side plate is connected to the edge of the main plate. The side plate extends from the main plate toward one side of the main plate along the height direction. The flange extends outward from the side of the side plate away from the main plate. The first side beam and the second side beam cooperate to clamp the flange.

16. The battery device as claimed in claim 15, characterized in that, The box body includes a cover having an edge connected to the flange, the edge extending between the first side beam and the second side beam, and the second fixing structure connecting the first side beam, the edge, the flange and the second side beam.

17. The battery device according to any one of claims 1-16, characterized in that, The battery device includes a thermal management component, which is installed in the housing.

18. The battery device as claimed in claim 17, characterized in that, The thermal management component is installed on the side of the main plate near the protrusion, and the thermal management component is provided with a channel for the flow of heat exchange fluid.

19. The battery device according to any one of claims 1-18, characterized in that, The main body of the box is a one-piece molded structure.

20. The battery device according to any one of claims 1-19, characterized in that, The main body of the box has a basin-shaped structure.

21. The battery device according to any one of claims 1-20, characterized in that, The main body of the box is a composite material structure.

22. The battery device according to any one of claims 1-21, characterized in that, The box includes a frame beam, the box body includes a side wall panel and a first extension, the side wall panel extends from the edge of the main body panel toward the side where the protrusion is located, the first extension extends from the outer surface of the side wall panel toward the direction away from the receiving space, and the frame beam is provided with a first receiving space adapted to accommodate the first extension.

23. The battery device as claimed in claim 22, characterized in that, The main body of the box includes a second extension, which extends from the side of the first extension away from the side wall panel toward the side away from the accommodating space. The inner surface of the second extension cooperates with the first extension to form an accommodating space. The frame beam includes an outer beam and an adapter beam, which is placed in the accommodating space. The side wall panel, on the side of the first extension near the main body panel, cooperates with the first extension and the second extension to form a stepped portion. The outer beam has a stepped surface that adapts to the outer surface of the stepped portion, and the stepped surface is bonded to the stepped portion.

24. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-23, the battery device being used to store or provide electrical energy.

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