Battery devices and electrical appliances

Abstract

This application belongs to the field of battery technology and provides a battery device and an electrical device. The battery device includes a housing and battery cells; the housing includes a main body made of non-metallic material and a beam connected to the main body. The main body includes a main plate and a protrusion. The protrusion extends from the main plate along the height direction of the housing towards one side of the main plate, and the battery cells are supported on the main plate; the beam includes a first sub-beam and a second sub-beam, which are respectively located on opposite sides of the protrusion. The first sub-beam is fixedly connected to the second sub-beam through the protrusion by a fixing structure. By providing a protrusion on the main plate, the structural strength of the main plate can be increased, and the beam is divided into a first sub-beam and a second sub-beam, so that the first sub-beam and the second sub-beam clamp the protrusion and are fixedly connected by a fixing structure, thereby improving the strength of the connection between the beam formed by the first sub-beam and the main body.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and more specifically, relates to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] To reduce the weight of battery packs, some battery packs often use non-metallic materials to construct parts of the casing, such as using composite materials for the lower casing. However, due to material limitations, such casings are often glued to the beams, resulting in relatively weak structural strength. Summary of the Invention

[0004] The purpose of this application is to provide a battery device and an electrical device to improve the problem that the box and beam made of non-metallic materials in related technologies are often glued together, resulting in relatively weak structural strength of the box.

[0005] In a first aspect, embodiments of this application provide a battery device, including a housing with a receiving space and 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.

[0006] The main body of the box includes a main plate and a protrusion connected to the main plate. The protrusion extends from the main plate along the height direction of the box towards one side of the main plate, and the battery cells are supported on the main plate.

[0007] 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 along the height direction on the side of the second sub-beam closer to the main plate. The first sub-beam passes through the protrusion and is fixedly connected to the second sub-beam through a fixing structure.

[0008] In the technical solution of this application embodiment, by providing a protrusion on the main body plate, the structural strength of the main body plate can be increased. The beam is divided into a first sub-beam and a second sub-beam, so that the first sub-beam and the second sub-beam clamp the protrusion and are fixed by a fixing structure, thereby improving the strength of the connection between the beam formed by the first sub-beam and the box body.

[0009] In some embodiments, the beam includes a limiting beam, a first sub-beam includes a first limiting beam forming a partial structure of the limiting beam, a second sub-beam includes a second limiting beam forming a partial structure of the limiting beam, a protrusion includes a first protrusion connected to the main body plate, and a fixing structure includes a first fixing structure that passes through the first protrusion and fixes the first limiting beam and the second limiting beam.

[0010] Through the above technical solution, the limiting beam is divided into a first limiting beam and a second limiting beam, which are clamped to the first protrusion of the main body of the box and fixedly connected by a first fixing structure to improve the connection strength between the limiting beam and the main body of the box. This makes the maximum position of the torque exerted on the limiting beam when the battery cell expands and deforms far away from the connection position between the limiting beam and the main body of the box, thereby improving the anti-expansion performance of the box.

[0011] In some embodiments, 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, and 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.

[0012] The above technical solution provides a first plate for easy connection and fixation with the first and second limiting beams, and a second plate for easy connection between the first plate and the main plate. The first and second plates together form a first protrusion, which is simple in structure and easy to manufacture.

[0013] In some embodiments, a positioning boss is provided on the side of the first plate near the second limiting beam, and a positioning groove is provided on the second limiting beam for the positioning boss to be inserted; or, a positioning boss is provided on the end face of the second limiting beam near the first plate, and a positioning groove is provided on the first plate for the positioning boss to be inserted.

[0014] The above technical solution facilitates the positioning between the first plate and the second limiting beam, thereby facilitating the installation of the second limiting beam and enabling the first fixing structure to connect and fix the first limiting beam, the first plate, and the second limiting beam.

[0015] In some embodiments, 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.

[0016] By using the above technical solution, the positioning boss is set at the corresponding position in the middle of the second limiting beam, and the positioning groove is located at the corresponding position in the middle of the first plate. This makes it easy to position the second limiting beam and the first plate in the thickness direction of the limiting beam, which facilitates connection.

[0017] In some embodiments, the first limiting beam is bonded to the first plate; and / or, the first limiting beam is bonded to the second plate.

[0018] The above technical solution connects the first limiting beam to the first plate, which facilitates the installation and fixing of the first limiting beam and also makes it easier to connect with the second limiting beam.

[0019] The above technical solution connects the first limiting beam and the second plate together, which facilitates the installation and fixation of the first limiting beam, improves the connection strength between the first limiting beam and the second plate, thereby improving the connection strength between the first limiting beam and the box body, and further improving the connection strength between the limiting beam and the box body, thus enhancing the anti-expansion performance.

[0020] In some embodiments, a second plate is provided on each of the opposite sides of the first plate.

[0021] Through the above technical solution, second plates are respectively set on the opposite sides of the first plate. After the first limiting beam is installed, the second plates on both sides of the first plate are respectively located on the opposite sides of the first limiting beam, which can stably support the first limiting beam, improve the connection strength between the first limiting beam and the box body, and improve the connection strength between the limiting beam and the box body. Moreover, the second plates on both sides of the first limiting beam can cooperate to withstand the expansion force of the battery cells, thereby improving the anti-expansion performance of the box.

[0022] In some embodiments, 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.

[0023] By using the above technical solution, an opening is provided on the main body plate, and the first limiting beam extends out of the main body plate through the opening to the side away from the second limiting beam, which facilitates the positioning and assembly of the first limiting beam.

[0024] In some embodiments, the size of the opening along the thickness direction of the limiting beam is adapted to the size of the first limiting beam.

[0025] The above technical solution allows for easy insertion of the first limiting beam from the opening toward the first plate, facilitating the assembly of the first limiting beam.

[0026] In some embodiments, the housing includes a protective plate disposed on the side of the main body plate opposite to the first protrusion, and a first limiting beam is placed on the protective plate.

[0027] By using the above technical solution, the protective plate can effectively protect the main body of the enclosure, reducing the direct impact of external shocks on the main body and thus affecting the safety of the battery cells. At the same time, the protective plate also provides additional support for the first limiting beam, further enhancing the overall structural stability of the enclosure and improving its anti-expansion performance.

[0028] In some embodiments, the guard plate is bonded to the first limiting beam.

[0029] By using the above technical solution, the guard plate can be bonded to the first limiting beam, which can better position and fix the first limiting beam, improve the connection strength, and thus improve the structural strength of the box.

[0030] In some embodiments, 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 receiving the protruding flange.

[0031] Through the above technical solution, the first fixed structure uses rivet bolts to connect the first limiting beam and the second limiting beam, which is convenient to connect and has structural strength. It can easily and tightly fix the first limiting beam, the first plate and the second limiting beam. A receiving groove is provided on the first limiting beam to accommodate the protruding edge, which facilitates the assembly of the rivet bolts.

[0032] In some embodiments, the first limiting beam is provided with a first weight reduction space, which extends along the length direction of the first limiting beam; and / or, the second limiting beam is provided with a second weight reduction space, which extends along the length direction of the second limiting beam.

[0033] The above technical solution can reduce the weight of the first limiting beam, thereby reducing the weight of the box body; and the first weight reduction space extends along the length of the first limiting beam, which can facilitate the processing and manufacturing of the first limiting beam and the first weight reduction space thereon.

[0034] The above technical solution can reduce the weight of the second limiting beam, thereby reducing the weight of the box body; and the second weight reduction space extends along the length of the second limiting beam, which can facilitate the processing and manufacturing of the second limiting beam and the second weight reduction space thereon.

[0035] In some embodiments, the beam body includes a side beam, a first sub-beam includes a first side beam forming a partial structure of the side beam, a second sub-beam includes a second side beam forming a partial structure of the side beam, a protrusion includes a second protrusion connected to the edge of the main body plate, and a fixing structure includes a second fixing structure that passes through the second protrusion to fix the first side beam and the second side beam.

[0036] The above technical solution divides the side beam into a first side beam and a second side beam to clamp the second protrusion at the edge of the main body plate and fixes it together with a second fixing structure to improve the connection strength between the side beam and the main body of the box, thereby improving the structural strength of the corresponding side of the box.

[0037] In some embodiments, the second protrusion includes a side plate and a flange. The side plate is connected to the edge of the main plate, and 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.

[0038] The above technical solution includes a flange for easy connection and fixation with the first and second side beams, and a side plate for easy connection between the flange and the main body plate, which can also serve as part of the side wall of the box. The flange and the side plate form a second protrusion, which is simple in structure and easy to manufacture.

[0039] In some embodiments, the housing includes a cover having an edge connected to a flange extending between a first side beam and a second side beam, and a second fixing structure connecting the first side beam, the edge, the flange, and the second side beam.

[0040] The above technical solution tightly connects the edge of the cover with the first side beam, the flange and the second side beam to form a stable overall structure, so that the cover can be firmly combined with the box body and the side beam, which facilitates the assembly of the box and can also realize the connection and fixation of the side beam.

[0041] In some embodiments, the battery device includes a thermal management component, which is installed in a housing.

[0042] By using the above technical solution and setting up thermal management components, the thermal management of individual battery cells can be effectively improved, thereby providing suitable operating temperatures for the individual battery cells.

[0043] In some embodiments, the thermal management component is mounted on the side of the main body plate near the protrusion, and the thermal management component has a channel for the flow of heat exchange fluid.

[0044] The above technical solution allows the thermal management component to be supported by the main plate, and channels are set in the thermal management component to allow the heat exchange fluid to flow, thereby realizing liquid heat exchange, improving heat exchange efficiency, and providing a better working temperature environment for the battery cells.

[0045] In some embodiments, the box body is a one-piece molded structure.

[0046] The above technical solutions facilitate the processing and manufacturing of the main body of the box, and improve the overall strength of the main body of the box, thereby enhancing the structural strength of the box.

[0047] In some embodiments, the box body has a basin-shaped structure.

[0048] With the above technical solution, the main body of the box is designed in a basin shape, which can be easily made into a box to accommodate individual battery cells, reducing the number of parts required for box manufacturing and facilitating box assembly.

[0049] In some embodiments, the box body is a composite material structure.

[0050] Through the above technical solution, the main body of the box uses a composite material structure, which is lightweight, has high structural strength, and is durable.

[0051] In some embodiments, the enclosure includes a frame beam, the enclosure body includes a side wall panel and a first extension, the side wall panel extends from the edge of the 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.

[0052] By using the above technical solution, a first extension is provided on the outer surface of the side wall panel, and a first receiving space is provided on the frame beam to receive the first extension. This can increase the connection area between the frame beam and the first extension, improve the stability of the connection, thereby improving the connection strength between the frame beam and the box body. Moreover, the frame beam can effectively support the first extension, thereby effectively supporting the box body and improving the overall stability of the box structure.

[0053] In some embodiments, the box body includes a second extension, which extends from the side of the first extension away from the sidewall panel toward the side away from the receiving space. The inner surface of the second extension cooperates with the first extension to form a receiving space. The frame beam includes an outer beam and an adapter beam, which is placed in the receiving space. The sidewall panel, the first extension, and the second extension cooperate to form a stepped portion on the side of the first extension near the main body panel. 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.

[0054] Through the above technical solution, an accommodating space can be formed between the adapter beam and the outer beam to accommodate the first extension; in addition, the adapter beam can improve the strength of the position between the second extension and the side wall panel; the bonding design of the stepped surface and the stepped part of the outer beam can increase the bonding area between the outer beam and the box body, thereby improving the connection strength between the outer beam and the box body.

[0055] Secondly, embodiments of this application provide an electrical device, including a battery device as described in the above embodiments, the battery device being used to store or provide electrical energy.

[0056] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0059] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0060] Figure 3 This is a partial structural diagram of the box body according to some embodiments of this application;

[0061] Figure 4 for Figure 3 A top view of part of the structure of the middle box;

[0062] Figure 5 For along Figure 4 Schematic diagram of the cross-sectional structure along line AA;

[0063] Figure 6 for Figure 5 A magnified structural diagram of section C;

[0064] Figure 7 for Figure 6 Schematic diagram of the first limiting beam in the middle;

[0065] Figure 8 for Figure 6 Schematic diagram of the second limiting beam in the middle;

[0066] 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;

[0067] Figure 10 This is a schematic diagram of the connection between the limiting beam and the first protrusion in some embodiments of this application;

[0068] Figure 11 This is a schematic diagram of the connection between the limiting beam and the first protrusion in some embodiments of this application;

[0069] Figure 12 This is a top view of a portion of the structure of the housing in some other embodiments of this application;

[0070] Figure 13 For along Figure 12 Schematic diagram of the cross-sectional structure of the middle DD line;

[0071] Figure 14 for Figure 13 A magnified structural diagram of section E in the middle;

[0072] 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;

[0073] Figure 16 This is a cross-sectional structural schematic diagram of the box body according to some embodiments of this application;

[0074] Figure 17 for Figure 16 A magnified structural diagram of section F in the middle;

[0075] Figure 18 For along Figure 4 Schematic diagram of the cross-sectional structure of the middle BB line;

[0076] Figure 19 for Figure 18 A magnified structural diagram of section G in the middle;

[0077] 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 ;

[0078] 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 ;

[0079] Figure 22 This is a schematic diagram of the connection between the side beam and the box body in some embodiments of this application. Figure 3 ;

[0080] Figure 23 This is a schematic diagram of the connection between the side beam and the box body in some embodiments of this application. Figure 4 ;

[0081] Figure 24 Schematic diagram of the connection between the side beam and the box body in some embodiments of this application Figure 5 .

[0082] The main markings in the attached figures are as follows:

[0083] 11. Vehicle; 111. Controller; 112. Motor;

[0084] 200. Battery assembly; 20. Housing; 201. First housing; 202. Second housing; 2001. Storage space;

[0085] 30. Box body; 31. Main body plate; 310. Opening; 311. Receiving slot; 32. Protrusion; 321. First protrusion; 3211. First plate; 32110. Positioning groove; 3212. Second plate; 322. Second protrusion; 3221. Side plate; 3222. Flanged edge; 330. Accommodation space; 331. Side wall plate; 332. First extension; 333. Second extension; 334. Folding part; 335. Third extension; 336. Folded edge plate;

[0086] 40. Beam body; 41. Limiting beam; 411. First limiting beam; 4110. First weight reduction space; 4111. Accommodating groove; 412. Second limiting beam; 4120. Second weight reduction space; 4121. Positioning boss; 42. Side beam; 421. First side beam; 422. Second side beam;

[0087] 50. Fixed structure; 51. First fixed structure; 511. Rivet bolt; 5111. Rivet sleeve; 51111. Protruding flange; 5112. Bolt; 51121. Bolt head; 52. Second fixed structure;

[0088] 61. Reinforcing beam; 62. Cover; 621. Edge; 63. Thermal management component; 631. Passage; 64. Protective plate;

[0089] 70. Side frame beam; 701. First receiving space; 702. Second receiving space; 703. Weight reduction cavity; 71. Outer beam; 711. Support part; 72. Adaptor beam; 73. Receiving part; 81. Rivet;

[0090] 300, battery cell;

[0091] X, first length direction; Y, first width direction; Z, height direction. Detailed Implementation

[0092] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0093] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0094] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0095] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0096] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0097] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0098] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0099] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces). "Several" means one or more, unless otherwise explicitly specified.

[0100] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0101] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0102] In the description of the embodiments of this application, unless otherwise expressly specified and limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it may be directly connected to or indirectly connected to the other element.

[0103] In the description of the embodiments in this application, unless otherwise expressly specified and limited, the technical term "proximity" refers to being close in location. For example, among three components A1, A2, and B, the distance between A1 and B is greater than the distance between A2 and B. Therefore, A2 is closer to B than A1, meaning A2 is adjacent to B, or B is adjacent to A2. Similarly, when there are multiple components C, namely C1, C2, ..., C... N If one of the C components, such as C2, is closer to the B component than the other C components, then B is adjacent to C2, or C2 is adjacent to B.

[0104] As battery devices are used in more and more applications, the demand for lightweight battery devices is also increasing, especially for mobile devices such as electric vehicles, ships, and aircraft, which require lightweight battery devices to reduce their weight. Lightweight battery devices not only improve the range of these devices but also reduce energy consumption, which is more in line with environmental protection trends.

[0105] To reduce the weight of battery devices and achieve lightweight construction, some current battery devices utilize lightweight non-metallic materials, such as carbon fiber and glass fiber, to construct the battery casing. For example, a non-metallic casing body, resembling a basin structure, can be used as the lower or upper casing. Beams made of steel, aluminum alloy, or other metallic materials are then attached to the casing body to increase structural strength and facilitate installation. However, due to limitations in the casing body material, the connection to the beams is often achieved through adhesive bonding, resulting in relatively weak structural strength.

[0106] Based on the above considerations, in order to improve the problem that the box and beam made of non-metallic materials are often glued together, resulting in relatively weak structural strength of the box, this application provides a battery device. By dividing the beam into a first sub-beam and a second sub-beam arranged side by side, and providing a protrusion on the main body plate of the box body to increase the structural strength of the main body plate, the first sub-beam and the second sub-beam clamp the protrusion, and a fixing structure is used to fix the first sub-beam, the protrusion and the second sub-beam together, thereby making the beam firmly connected to the box body, thereby improving the strength of the connection between the beam formed by the first sub-beam and the second sub-beam and the box body, and thus improving the structural strength of the box.

[0107] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0108] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0109] A single battery cell typically contains a certain amount of gas. During charging or discharging, the electrolyte solution undergoes gas generation or absorption reactions. This gas generation increases the internal gas pressure of the battery cell, causing it to expand and deform. During charging or discharging, the positive and negative electrode materials undergo chemical reactions, forming new compounds. These chemical reactions are accompanied by volume changes, leading to volume changes in the internal materials of the battery cell, resulting in expansion and deformation. Overcharging or over-discharging can cause uncontrolled chemical reactions within the battery cell, generating excessive gas or damaging the electrode material structure, further leading to expansion and deformation. Charging or discharging a battery cell at high temperatures accelerates internal chemical reactions, increasing gas generation and volume changes. High temperatures also cause the internal materials of the battery cell to expand, further contributing to its expansion and deformation.

[0110] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0111] For ease of explanation, an electrical device is provided in one embodiment of this application, which is illustrated using a vehicle as an example.

[0112] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 11 provided in some embodiments of this application. The vehicle 11 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 200 is provided inside the vehicle 11, and the battery device 200 can be located at the bottom, front, or rear of the vehicle 11. The battery device 200 can be used to power the vehicle 11; for example, the battery device 200 can serve as the operating power source for the vehicle 11. The vehicle 11 may also include a controller 111 and a motor 112. The controller 111 is used to control the battery device 200 to supply power to the motor 112, for example, to meet the power needs of the vehicle 11 during starting, navigation, and driving.

[0113] In some embodiments, the battery device 200 can not only serve as the operating power source for the vehicle 11, but also as the driving power source for the vehicle 11, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 11.

[0114] Please refer to Figure 2 This application provides a battery device 200. The battery device 200 may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 300, which are connected in series, parallel, or mixed connection via a busbar.

[0115] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 300.

[0116] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 300 together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells 300 together with cable ties.

[0117] In some embodiments, the battery device 200 may be a battery pack, which includes a housing 20 and one or more individual battery cells housed within the housing 20.

[0118] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 20 by fixing the battery module in the housing 20.

[0119] As an example, the battery cell assembly can also be housed in the housing 20 by directly fixing multiple battery cells 300 to the housing 20.

[0120] In some embodiments, the housing 20 may include a first housing 201 and a second housing 202, which are fastened together to form a closed space inside the housing 20 to accommodate the battery cell 300. Here, "closed" refers to covering or shutting off, and can be either sealed or unsealed. The second housing 202 may be a hollow structure with one open end, and the first housing 201 may be a plate-like structure, covering the open side of the second housing 202. The first housing 201 may be the top cover or bottom plate of the housing 20. Alternatively, the first housing 201 and the second housing 202 may both be hollow structures with one open end, with the open side of the first housing 201 covering the open side of the second housing 202.

[0121] In some embodiments, the housing 20 may 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, thereby forming a closed space inside the housing 20 to accommodate the battery cells 300. The frame refers to a portion of the structure forming the peripheral sidewalls of the housing 20, the top cover refers to a plate-like structure forming the top of the housing 20, and the bottom plate refers to a plate-like structure forming the bottom of the housing 20.

[0122] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0123] Please see Figure 2 The box 20 has length, width, and height directions, such as Figure 2 The first length direction is indicated by the symbol X, the first width direction by the symbol Y, and the first height direction by the symbol Z. The first length direction X is the length direction of the box 20, the first width direction is the width direction of the box 20, and the first height direction Z is the height direction of the box 20.

[0124] Please see Figures 3 to 15According 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 towards the main plate 31, and the battery cell 300 is supported on 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.

[0125] The housing 20 refers to the container structure that houses the battery cell 300. The housing space 2001 refers to the space inside the housing 20 for installing the battery cell 300.

[0126] A battery cell 300 refers to the smallest unit in the battery device 200 that stores and releases electrical energy. The battery cell 300 is installed in the housing space 2001 of the casing 20, which supports and protects the battery cell 300.

[0127] The main body 30 of the box refers to a structure made of non-metallic materials that forms part of the structure of the box body 20. Using non-metallic materials, the main body 30 is lightweight, highly corrosion-resistant, and effectively improves its structural safety and durability. Non-metallic materials can be plastics, composite materials, etc. Composite materials are materials composed of two or more different materials, often formed by combining resin with reinforcing materials. Resin materials are usually used as the matrix material, such as epoxy resin, polyester resin, or vinyl ester resin, to improve adhesion and protection. Reinforcing materials can be fiber materials, granular materials, or sheet materials to improve strength and stiffness. Fiber materials can be carbon fiber, glass fiber, or aramid fiber. Granular materials can be silicon carbide particles. Sheet materials can be mica sheets. Carbon fiber composites, glass fiber composites, or aramid fiber composites can be called fiber composites, which are often made by coating fibers with resin, weaving them into fabric or strips, and then hot-pressing them into structural components of the corresponding shape. Using composite materials to make the main body 30 results in a lightweight and highly corrosion-resistant structure. The main body of the box is made of fiber composite material, which is lightweight, has high structural strength, and is highly corrosion resistant.

[0128] The beam 40 refers to the beam-column structure used to enhance the structural stability of the housing 20. The length and shape of the beam 40 can be designed according to actual needs to accommodate battery devices 200 of different sizes. The beam 40 can be made of metal materials such as steel and aluminum alloy. Of course, in some embodiments, the beam 40 can also be made of composite materials such as carbon fiber and glass fiber to further reduce weight and increase strength. As an example, the length direction of the beam 40 can be aligned with the first length direction X. As an example, the length direction of the beam 40 can be perpendicular to the first length direction X. As an example, the length direction of the beam 40 can also be inclined to the first length direction X. Specifically, the beam 40 can be configured according to its installation location and usage requirements.

[0129] The first sub-beam refers to the beam-column structure that forms part of the beam body 40 along the height Z direction of the box girder 20. The second sub-beam refers to the beam-column structure that forms another part of the beam body 40 along the height Z direction of the box girder 20. The first and second sub-beams extend in the same direction, meaning that the extension directions of the first and second sub-beams are the same. The first and second sub-beams are arranged along the height Z direction of the box girder 20, and the first and second sub-beams are combined to form the corresponding beam body 40.

[0130] The main body plate 31 is the main structural part of the box body 30. The main body plate 31 is the main plate part that constitutes the top or bottom of the box body 20 in the height direction Z.

[0131] The protrusion 32 refers to the portion of the main body plate 31 that protrudes along the height direction Z. Providing the protrusion 32 on the main body plate 31 increases its structural strength. As an example, the protrusion 32 can be elongated, with its length aligned with the length direction of the beam 40 to ensure a good connection. Alternatively, multiple protrusions 32 can be provided along the length direction of the beam 40, and each protrusion 32 can be relatively small in size along the beam 40's length, thus increasing the number of connection points with the beam 40 for a better connection.

[0132] As an example, the cross-section of the protrusion 32 along its length direction can be rectangular, or it can be arc-shaped, triangular, or other shapes.

[0133] The battery cell 300 being supported on the main plate 31 means that the battery cell 300 can be directly mounted on the main plate 31 and supported by the main plate 31; or the battery cell 300 can be indirectly mounted on the main plate 31 and supported by the main plate 31. For example, a cold plate or other components can be set between the main plate 31 and the battery cell 300.

[0134] The first sub-beam and the second sub-beam are respectively located on opposite sides of the protrusion 32, meaning that the first sub-beam and the second sub-beam are separated by the protrusion 32.

[0135] The first sub-beam is positioned along the height direction Z on the side of the second sub-beam closest to the main plate 31, so as to facilitate the determination of the positions of the first and second sub-beams and to facilitate the installation and fixing of the first and second sub-beams.

[0136] With the fixed structure 50 connecting the first sub-beam and the second sub-beam, the first sub-beam and the second sub-beam clamp the protrusion 32.

[0137] The fixing structure 50 refers to a structure that connects at least two objects. As an example, the fixing structure 50 can be a fastener, such as a bolt, rivet, screw, or pin, which securely connects the first sub-beam, the protrusion 32, and the second sub-beam. As an example, the fixing structure 50 can also be a buckle on the first sub-beam, with a corresponding locking hole on the second sub-beam. The buckle passes through the protrusion 32 and engages in the locking hole to securely connect the first sub-beam, the protrusion 32, and the second sub-beam. As an example, the fixing structure 50 can also be a buckle on the second sub-beam, with a corresponding locking hole on the first sub-beam. The buckle passes through the protrusion 32 and engages in the locking hole to securely connect the first sub-beam, the protrusion 32, and the second sub-beam.

[0138] In the technical solution of this application embodiment, by providing a protrusion 32 on the main body plate 31, the structural strength of the main body plate 31 can be increased. The beam 40 is divided into a first sub-beam and a second sub-beam, so that the first sub-beam and the second sub-beam clamp the protrusion 32 and are connected and fixed by the fixing structure 50, thereby improving the strength of the connection between the beam 40 formed by the first sub-beam and the box body 30.

[0139] In some embodiments, please refer to Figures 3 to 10 The beam body 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 connected to the main plate 31, and a fixing structure 50 including a first fixing structure 51 passing through the first protrusion 321 to fix the first limiting beam 411 and the second limiting beam 412.

[0140] The limiting beam 41 refers to the beam 40 in the box 20 used to support the battery cell 300 and limit the expansion and deformation of the battery cell 300.

[0141] The first limiting beam 411 refers to a beam-column structure that forms part of the limiting beam 41 along the height direction Z of the box body 20. Correspondingly, the first limiting beam 411 forms the first sub-beam of the corresponding beam body 40. The second limiting beam 412 refers to a beam-column structure that forms another part of the limiting beam 41 along the height direction Z of the box body 20. Correspondingly, the second limiting beam 412 forms the second sub-beam of the corresponding 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 the first limiting beam 411 and the second limiting beam 412 are combined to form the corresponding limiting beam 41.

[0142] The first protrusion 321 refers to the protrusion that is connected to the limiting beam 41.

[0143] The first fixing structure 51 refers to the fixing structure that connects the first limiting beam 411, the first protrusion 321, and the second limiting beam 412. As an example, the first fixing structure 51 can be a fastener, such as a bolt, rivet, screw, pin, or other structural component, through which the first limiting beam 411, the first protrusion 321, and the second limiting beam 412 are fixedly connected.

[0144] The first fixing structure 51 passes through the first protrusion 321 and fixes the first limiting beam 411 and the second limiting beam 412, thereby fixing the first limiting beam 411, the first protrusion 321 and the second limiting beam 412 together to form a complete limiting beam 41. The limiting beam 41 is then connected to the main body plate 31 to install the limiting beam 41 in the box body 30, thereby improving the connection strength between the limiting beam 41 and the box body 30.

[0145] As the battery cell 300 expands and deforms, it will press against one side of the limiting beam 41, thus generating a torque on the limiting beam 41 away from the battery cell 300. The torque on the limiting beam 41 is the largest near the main body plate 31. Providing a first protrusion 321 on the main body plate 31 increases its structural strength. The first limiting beam 411 and the second limiting beam 412 clamp the first protrusion 321 and are fixedly connected by the first fixing structure 51. This allows the connection point between the limiting beam 41 and the main body 30 to be moved away from the main body plate 31, thereby avoiding the position where the limiting beam 41 experiences the maximum torque from the expansion of the battery cell 300. This makes the connection between the limiting beam 41 and the main body 30 less prone to loosening or damage, thus improving its anti-expansion performance.

[0146] Through the above technical solution, the limiting beam 41 is divided into a first limiting beam 411 and a second limiting beam 412, which are clamped to the first protrusion 321 of the box body 30 and fixedly connected by the first fixing structure 51, so as to improve the connection strength between the limiting beam 41 and the box body 30, and make the maximum position of the torque exerted on the limiting beam 41 by the battery cell 300 when it expands and deforms far away from the connection position between the limiting beam 41 and the box body 30, so as to improve the anti-expansion performance of the box body 20.

[0147] In some embodiments, please refer to Figures 5 to 10 The first protrusion 321 includes a first plate 3211 and a second plate 3212. The first plate 3211 is disposed on one side of the main plate 31 along the height direction Z of the box 20. The second plate 3212 connects 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.

[0148] The first plate 3211 refers to a portion of the structure on the protrusion 32 located between the first limiting beam 411 and the second limiting beam 412. The second plate 3212 refers to a portion of the structure on the protrusion 32 connecting the first plate 3211 and the main plate 31.

[0149] Through the above technical solution, a first plate 3211 is provided to facilitate connection and fixation with the first limiting beam 411 and the second limiting beam 412. A second plate 3212 is provided to facilitate connection of the first plate 3211 to the main plate 31. The first plate 3211 and the second plate 3212 form a first protrusion 321, which has a simple structure and is easy to manufacture. In addition, the second plate 3212 can directly support the battery cell 300 to improve its anti-expansion performance.

[0150] In some embodiments, please refer to Figure 11 The first fixing structure 51 can also be a buckle disposed on the first limiting beam 411. The buckle passes through the first protrusion 321 and is engaged with the corresponding second limiting beam 412, thereby achieving a fixed connection between the first limiting beam 411, the first protrusion 321, and the second limiting beam 412. The structure is simple and easy to assemble. In some embodiments, the first fixing structure 51 can also be a buckle disposed on the second limiting beam 412. The buckle passes through the first protrusion 321 and is engaged with the corresponding first limiting beam 411, thereby achieving a fixed connection between the first limiting beam 411, the first protrusion 321, and the second limiting beam 412.

[0151] In some embodiments, please refer to Figures 6 to 8 The second limiting beam 412 has a positioning boss 4121 on the end face near the first plate 3211, and the first plate 3211 has a corresponding positioning groove 32110 for the positioning boss 4121 to be inserted.

[0152] The positioning boss 4121 refers to a boss structure provided on a structural component. The positioning boss 4121 can be provided in the shape of a strip, column, or block, etc., and can be set according to the needs.

[0153] The provision of a positioning boss 4121 on the end face of the second limiting beam 412 near the first plate 3211 means that the positioning boss 4121 is provided on the end face of the second limiting beam 412, and the positioning boss 4121 is located on the end face of the second limiting beam 412 near the first plate 3211.

[0154] The positioning groove 32110 refers to the groove structure set on the structural component.

[0155] The first plate 3211 is provided with a positioning groove 32110 for the positioning boss 4121 to be inserted. This means that the positioning groove 32110 is set on the first plate 3211, and the shape and size of the positioning groove 32110 match the shape and size of the positioning boss 4121, so that the positioning boss 4121 can be accurately placed in the positioning groove 32110, so as to accurately position the second limiting beam 412 and the first plate 3211, so as to assemble and fix the second limiting beam 412.

[0156] The above technical solution facilitates the positioning between the first plate 3211 and the second limiting beam 412, thereby facilitating the installation of the second limiting beam 412 and enabling the first fixing structure 51 to connect and fix the first limiting beam 411, the first plate 3211, and the second limiting beam 412.

[0157] In some embodiments, a positioning boss 4121 may be provided on the side of the first plate 3211 near the second limiting beam 412, and a positioning groove 32110 correspondingly provided on the second limiting beam 412 for the positioning boss 4121 to be inserted.

[0158] The first plate 3211 is provided with a positioning boss 4121 on the side near the second limiting beam 412. This means that the positioning boss 4121 is provided on the end face of the first plate 3211 and the positioning boss 4121 is located on the side of the first plate 3211 near the second limiting beam 412.

[0159] The second limiting beam 412 is provided with a positioning groove 32110 for the positioning boss 4121 to be inserted. This means that the positioning groove 32110 is located on the end face of the second limiting beam 412, and the positioning groove 32110 is located on the end face of the second limiting beam 412 near the first plate 3211. The shape and size of the positioning groove 32110 match the shape and size of the positioning boss 4121, so that the positioning boss 4121 can be accurately placed in the positioning groove 32110, so as to accurately position the second limiting beam 412 and the first plate 3211, so as to assemble and fix the second limiting beam 412.

[0160] In some embodiments, please refer to Figures 6 to 8 Along the thickness direction of the limiting beam 41, the positioning boss 4121 is located in the middle of the second limiting beam 412, and the positioning groove 32110 is located in the middle of the first plate 3211.

[0161] The thickness direction of the limiting beam 41 refers to the direction perpendicular to the length of the limiting beam 41 and perpendicular to the height direction Z of the box 20.

[0162] Along the thickness direction of the limiting beam 41, the positioning boss 4121 is located in the middle of the second limiting beam 412, and the positioning groove 32110 is located in the middle of the first plate 3211. This means that the positioning boss 4121 and the positioning groove 32110 are located in the middle of the second limiting beam 412 and also in the middle of the first plate 3211 along the thickness direction of the limiting beam 41.

[0163] With the above technical solution, the positioning boss 4121 is located at the corresponding position in the middle of the second limiting beam 412, and the positioning groove 32110 is located at the corresponding position in the middle of the first plate 3211. The positioning boss 4121 is placed in the positioning groove 32110, which can position the second limiting beam 412 and the first plate 3211 along the thickness direction of the limiting beam 41, so as to facilitate the positioning of the second limiting beam 412 and the first plate 3211 in the thickness direction of the limiting beam 41 and facilitate connection.

[0164] In some embodiments, please refer to Figures 6 to 11 The first limiting beam 411 is bonded to the first protrusion 321.

[0165] The first limiting beam 411 is bonded to the first protrusion 321 using an adhesive. This connection enhances the strength of the bond and facilitates positioning of the first limiting beam 411 during assembly. The first limiting beam 411 can be integrally bonded to the first protrusion 321, or it can be partially bonded to the first protrusion 321.

[0166] The first limiting beam 411 can be bonded to the first protrusion 321 using adhesives such as double-sided tape, structural adhesive, or curing adhesive.

[0167] In some embodiments, please refer to Figures 6 to 10 The first limiting beam 411 is bonded to the first plate 3211.

[0168] The first limiting beam 411 is bonded to the first plate 3211 by means of an adhesive, which connects the end face of the first limiting beam 411 near the first plate 3211 to the corresponding side face of the first plate 3211. This improves the connection strength between the first limiting beam 411 and the first plate 3211 and allows for positioning of the first limiting beam 411 during assembly, facilitating its assembly.

[0169] The first limiting beam 411 can be bonded to the first plate 3211 using adhesives such as double-sided tape, structural adhesive, and curing adhesive.

[0170] Through the above technical solution, the first limiting beam 411 is bonded to the first plate 3211 to facilitate the installation and fixation of the first limiting beam 411 and to facilitate its connection with the second limiting beam 412.

[0171] In some embodiments, please refer to Figures 6 to 10 The first limiting beam 411 is bonded to the second plate 3212.

[0172] The first limiting beam 411 is bonded to the second plate 3212 by means that the side of the first limiting beam 411 near the second plate 3212 is connected to the corresponding side of the second plate 3212 by means of adhesive, so as to improve the connection strength between the first limiting beam 411 and the second plate 3212. In addition, the first limiting beam 411 can also be positioned during assembly, which facilitates the assembly of the first limiting beam 411.

[0173] The first limiting beam 411 can be bonded to the second plate 3212 using adhesives such as double-sided tape, structural adhesive, and curing adhesive.

[0174] Through the above technical solution, the first limiting beam 411 and the second plate 3212 are bonded together, which facilitates the installation and fixation of the first limiting beam 411, improves the connection strength between the first limiting beam 411 and the second plate 3212, thereby improving the connection strength between the first limiting beam 411 and the box body 30, and further improving the connection strength between the limiting beam 41 and the box body 30, thus improving the anti-expansion performance.

[0175] In some embodiments, only the first limiting beam 411 may be bonded to the first plate 3211. In one embodiment, only the first limiting beam 411 may be bonded to the second plate 3212. In some embodiments, the first limiting beam 411 may be bonded to both the first plate 3211 and the second plate 3212.

[0176] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 6 , Figure 9 and Figure 10The first limiting beam 411 has a second plate 3212 on at least one side close to the battery cell 300.

[0177] The side of the first limiting beam 411 closest to the battery cell 300 refers to the side where the distance between the first limiting beam 411 and the battery cell 300 is the smallest when the battery cell 300 is mounted on the main plate 31.

[0178] With the above technical solution, a second plate 3212 is provided on the side of the first limiting beam 411 near the battery cell 300. When the battery cell 300 is placed on the main plate 31, the second plate 3212 can support a portion of the adjacent battery cell 300 and cooperate with the first limiting beam 411 and the second limiting beam 412 to limit the expansion and deformation of the battery cell 300, thereby improving the anti-expansion performance.

[0179] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 6 and Figure 9 The first plate 3211 has a second plate 3212 on each of its opposite sides.

[0180] The second plate 3212 is provided on the opposite sides of the first plate 3211. This means that the second plate 3212 is provided on the opposite sides of the first plate 3211 along the thickness direction of the limiting beam 41. In other words, the opposite sides of the first plate 3211 are connected to the main plate 31 through the second plate 3212, which can better support the first plate 3211 and improve the structural strength of the box body 30.

[0181] Through the above technical solution, second plates 3212 are respectively provided on the opposite sides of the first plate 3211. Thus, after the first limiting beam 411 is installed, the second plates 3212 on both sides of the first plate 3211 are respectively located on the opposite sides of the first limiting beam 411, which can stably support the first limiting beam 411, improve the connection strength between the first limiting beam 411 and the box body 30, and improve the connection strength between the limiting beam 41 and the box body 30. Moreover, the second plates 3212 on both sides of the first limiting beam 411 can cooperate to withstand the expansion force of the battery cell 300, thereby improving the anti-expansion performance of the box 20.

[0182] In some embodiments, please refer to Figure 10 Alternatively, the second plate 3212 can be provided only on one side of the first plate 3211, meaning that one side of the first plate 3211 is connected to the main plate 31 via the second plate 3212. As an example, the second plate 3212 can be provided only on the side of the first plate 3211 closest to the battery cell 300. As an example, the second plate 3212 can also be provided only on the side of the first plate 3211 furthest from the battery cell 300.

[0183] In some embodiments, please refer to Figure 6 , Figure 9 and Figure 10 An opening 310 is provided on the main plate 31 at the position corresponding to the first protrusion 321, and the first limiting beam 411 protrudes from the main plate 31 through the opening 310 on the side away from the second limiting beam 412.

[0184] Opening 310 refers to the through-hole structure provided on the main body plate 31. The opening 310 on the main body plate 31 corresponding to the position of the first protrusion 321 means that the opening 310 is located on the main body plate 31 and within the area covered by the first protrusion 321. The shape and size of the opening 310 can be set according to the size and shape of the first limiting beam 411.

[0185] The first limiting beam 411 protrudes from the main body plate 31 through the opening 310 to the side away from the second limiting beam 412. This means that the side of the first limiting beam 411 away from the second limiting beam 412 extends through the opening 310 to the side of the main body plate 31 away from the first plate 3211. Thus, the first limiting beam 411 can be positioned through the opening 310, and the dimension of the first limiting beam 411 along the height direction Z can be increased to improve the structural strength of the first limiting beam 411.

[0186] By using the above technical solution, an opening 310 is provided on the main body plate 31, and the first limiting beam 411 extends out of the main body plate 31 through the opening 310 to the side away from the second limiting beam 412, which facilitates the positioning and assembly of the first limiting beam 411.

[0187] In some embodiments, please refer to Figure 6 , Figure 9 and Figure 10 Along the thickness direction of the limiting beam 41, the size of the opening 310 is adapted to the size of the first limiting beam 411.

[0188] The dimension of opening 310 along the thickness direction of limiting beam 41 refers to the width dimension of opening 310.

[0189] The dimension of the first limiting beam 411 along the thickness direction refers to the thickness dimension of the first limiting beam 411.

[0190] The above technical solution allows the first limiting beam 411 to be easily inserted from the opening 310 toward the first protrusion 321 for assembly. Furthermore, the first limiting beam 411 can be positioned along the thickness direction of the limiting beam 41 through the side wall of the opening 310.

[0191] In some embodiments, the opening 310 may not be provided on the main body plate 31, and the first limiting beam 411 may be directly supported on the main body plate 31. As an example, when manufacturing the box body 30, the first limiting beam 411 may be directly embedded into the space formed by the main body plate 31, the second plate 3212, and the first plate 3211. As an example, when manufacturing the box body 30, the first limiting beam 411 may be directly embedded into the space formed between the main body plate 31 and the first protrusion 321.

[0192] In some embodiments, please refer to Figures 3 to 10 The housing 20 includes a protective plate 64 located on the side of the main body plate 31 opposite to the first protrusion 321, and a first limiting beam 411 is placed on the protective plate 64.

[0193] The protective plate 64 refers to the plate that protects the side of the main plate 31 away from the first protrusion 321. The protective plate 64 can be made of metal materials such as steel and aluminum alloy, or composite materials such as carbon fiber and glass fiber.

[0194] The first limiting beam 411 being placed on the guard plate 64 means that the end of the first limiting beam 411 facing away from the second limiting beam 412 is in contact with or abuts against the guard plate 64.

[0195] Through the above technical solution, the protective plate 64 can provide good protection for the main body plate 31 of the box 20, reduce the direct impact of external impact on the main body plate 31, and reduce the impact on the safety of the battery cell 300. At the same time, the presence of the protective plate 64 also provides additional support for the first limiting beam 411, further enhancing the overall structural stability of the box 20 and improving its anti-expansion performance.

[0196] In some embodiments, the protective plate 64 is spaced apart from the main plate 31. When the housing 20 is subjected to external impact, the protective plate 64 can deform more to reduce the impact on the main plate 31, thereby effectively buffering external forces and ensuring the safety of the main plate 31 and the battery cell 300.

[0197] In some embodiments, the guard plate 64 is bonded to the first limiting beam 411.

[0198] The adhesive connection between the guard plate 64 and the first limiting beam 411 means that the end face of the guard plate 64 and the end of the first limiting beam 411 facing away from the second limiting beam 412 is bonded with adhesive to improve the connection strength between the first limiting beam 411 and the guard plate 64.

[0199] The first limiting beam 411 can be bonded to the protective plate 64 using adhesives such as double-sided tape, structural adhesive, and curing adhesive.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] 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.

[0226] 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.

[0227] The second protrusion 322 refers to the protrusion that connects to the side beam 42.

[0228] 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.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] In some embodiments, please refer to Figure 16 and Figure 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.

[0236] 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.

[0237] As an example, the cover 62 can also be configured to have the same structure as the box body 30.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] In some embodiments, the cross-section of the second protrusion 322 along its length direction can be arranged in the shape of an arc, triangle, or the like, and correspondingly, the side beam 42 can serve as the corresponding side wall of the box 20.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] In some embodiments, please refer to Figures 3 to 6 The main body of the box is a one-piece molded structure.

[0251] 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.

[0252] 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.

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] 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.

[0259] In some embodiments, the box body 30 has a basin-shaped structure.

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] In some embodiments, the box body 30 is a composite material structure.

[0267] Composite structures refer to box structures made of composite materials.

[0268] 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.

[0269] 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.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] 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.

[0274] 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.

[0275] 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.

[0276] 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.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] In some embodiments, the weight reduction cavity 703 extends along the length direction of the side frame beam 70.

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] 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.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] The stepped surface can be bonded to the step section using adhesives such as double-sided tape, structural adhesive, and curing adhesive.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] 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.

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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.

[0306] 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.

[0307] 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.

[0308] In some embodiments, please refer to Figures 19 to 22 The second extension 333 is riveted to the outer beam 71.

[0309] 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.

[0310] 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.

[0311] In some embodiments, the second extension 333 and the outer beam 71 may also be connected by fasteners such as bolts or locks.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] In some embodiments, the adapter beam 72 can be fixedly connected to the first extension 332 via the fixing structure 50.

[0316] In some embodiments, the adapter beam 72 can be fixedly connected to the second extension 333 via the fixing structure 50.

[0317] 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 panel 331 along the height direction Z.

[0318] 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.

[0319] 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.

[0320] 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.

[0321] 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.

[0322] 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.

[0323] 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.

[0324] 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.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] 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.

[0330] 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.

[0331] 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.

[0332] 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.

[0333] The receiving part 73 refers to the part of the frame beam 70 that protrudes and extends toward the main body plate 31.

[0334] 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.

[0335] 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.

[0336] 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.

[0337] 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.

[0338] 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.

[0339] 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.

[0340] The receiving groove 311 refers to the groove structure provided on the main body plate 31.

[0341] 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.

[0342] 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.

[0343] 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.

[0344] 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.

[0345] 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.

[0346] 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. The first protrusion has a space inside, and the main body plate has an opening at the position corresponding to the first protrusion. One end of the first limiting beam extends into the space inside the first protrusion, and the other end of the first limiting beam protrudes from the side of the main body plate away from the second limiting beam through the opening. The first limiting beam is bonded to the inner surface of the first protrusion.

2. The battery device as claimed in claim 1, 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.

3. The battery device as claimed in claim 2, 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.

4. The battery device as claimed in claim 3, 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.

5. The battery device as described in any one of claims 2-4, 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.

6. The battery device as claimed in any one of claims 2-4, characterized in that, The second plate is provided on each of the opposite sides of the first plate.

7. The battery device according to any one of claims 1-4, 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.

8. The battery device as claimed in claim 7, 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.

9. The battery device as claimed in claim 8, characterized in that, The protective plate is bonded to the first limiting beam.

10. The battery device according to any one of claims 1-4, 8-9, 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.

11. The battery device as described in any one of claims 1-4 and 8-9, 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.

12. The battery device as claimed in claim 11, 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.

13. The battery device as claimed in claim 12, 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.

14. The battery device according to any one of claims 1-4, 8-9, 12-13, characterized in that, The battery device includes a thermal management component, which is installed in the housing.

15. The battery device as claimed in claim 14, characterized in that, The thermal management component is installed on the side of the main body plate near the protrusion, and the thermal management component is provided with a channel for the flow of heat exchange fluid.

16. The battery device according to any one of claims 1-4, 8-9, 12-13, and 15, characterized in that, The main body of the box is a one-piece molded structure.

17. The battery device according to any one of claims 1-4, 8-9, 12-13, and 15, characterized in that, The main body of the box has a basin-shaped structure.

18. The battery device according to any one of claims 1-4, 8-9, 12-13, and 15, characterized in that, The main body of the box is a composite material structure.

19. The battery device according to any one of claims 1-4, 8-9, 12-13, and 15, 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.

20. The battery device as claimed in claim 19, 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.

21. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-20, the battery device being used to store or provide electrical energy.

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