Battery device and electric device

Abstract

The application provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer, a beam body and a mounting structure. The box body comprises a first wall plate provided with a first opening. The mounting structure comprises a first sealing piece, a first locking rod, a second locking rod and a second sealing piece. The first sealing piece is arranged around the first opening. One end of the first locking rod is fixedly connected with the beam body, and the other end abuts the first sealing piece on the first wall plate. The other end of the first locking rod is provided with a first connecting hole. One end of the second locking rod is provided with a boss, and the other end is fixed in the first connecting hole through the first opening, so that the boss abuts the first wall plate on the side facing the first sealing piece. One end of the second locking rod is provided with a second connecting hole for connecting a fastener of a carrier. The second sealing piece seals the gap between the boss and the first wall plate. The sealing between the mounting structure and the first wall plate can be well realized, the sealing reliability is good, and the number of parts used is small, and the assembly is simple and convenient.

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] As the range requirements for new energy electric vehicles increase, the size of battery devices is also increasing, and the performance requirements for battery devices are also becoming more stringent. Currently, in addition to the frame of the battery pack connecting to the vehicle, battery devices often incorporate beams within the battery pack, with mounting structures on these beams to connect to the vehicle and enhance the strength of the connection between the battery pack and the vehicle.

[0003] In related technologies, the mounting structure involves sealing and fitting between many parts, which not only makes assembly inconvenient but also carries a high risk of seal failure. Utility Model Content

[0004] The purpose of this application is to provide a battery device and an electrical device to improve the problem of high risk of sealing failure at the mounting structure of the battery device in related technologies.

[0005] In a first aspect, embodiments of this application provide a battery device, including a housing, battery cells, a beam, and a mounting structure; the battery cells are installed in the housing, the beam is installed in the housing, the housing includes a first wall panel disposed on one side along the height direction of the beam, and the first wall panel has a first opening corresponding to the position of the beam; the mounting structure includes:

[0006] The first sealing element is disposed on the inner side of the first wall panel and surrounds the first opening;

[0007] The first locking rod has one end fixedly connected to the beam, and the other end holds the first sealing element against the first wall panel. The other end of the first locking rod is provided with a first connecting hole.

[0008] The second locking rod has a boss protruding from the periphery of one end, and the other end passes through the first opening and is fixed to the first connecting hole so that the boss abuts against the first wall plate on the side facing the first seal. One end of the second locking rod is provided with a second connecting hole for fasteners for connecting the carrier.

[0009] The second seal is used to seal the gap between the sealing boss and the first wall plate.

[0010] In the technical solution of this application embodiment, the first locking rod is fixedly connected to the beam body, and the second locking rod is installed in the first connecting hole of the first locking rod, so that the boss of the second locking rod cooperates with the first locking rod to clamp the first wall panel of the box body, and the first sealing member seals the first locking rod and the first wall panel, and the second sealing member seals the boss and the first wall panel, so as to achieve the sealing between the mounting structure and the first wall panel, and thus achieve the sealing at the connection between the mounting structure and the box body. The sealing reliability is good, and fewer parts are used, and the assembly is simple and convenient. The second locking rod is provided with a second connecting hole, which can be easily connected with the fasteners of the carrier to achieve the connection and fixation of the carrier and the box body.

[0011] In some embodiments, the first locking rod passes through the beam along the height direction, the beam has a through hole through which the first locking rod passes, and one end of the first locking rod is connected to the side of the beam away from the first wall panel.

[0012] By using the above technical solution, a through hole is set on the beam and the first locking rod passes through the beam, which facilitates the positioning of the first locking rod and the fixed connection between the first locking rod and the beam.

[0013] In some embodiments, one end of the first locking rod is provided with a flange, and the beam is supported on the flange.

[0014] With the above technical solution, a flange is set on the first locking rod, and the first locking rod passes through the beam, which makes it easy to support the beam on the flange, and then support the beam on the first locking rod.

[0015] In some embodiments, the beam is welded to the flange.

[0016] The above technical solution can improve the connection strength between the beam and the first locking rod, and the connection is simple and highly reliable.

[0017] In some embodiments, the side of the beam facing away from the first wall panel is provided with a receiving groove for receiving the flange.

[0018] By using the above technical solution, a receiving groove is set on the beam, which can not only position the flange, but also accommodate the flange so that the side of the beam away from the first wall panel can be connected to the box body.

[0019] In some embodiments, the end face of the other end of the first locking rod protrudes from the beam, or the end face of the other end of the first locking rod is flush with the end face of the beam near the first wall panel.

[0020] By using the above technical solution, the end face of the first locking rod protrudes from the corresponding end face of the beam, or the end face of the first locking rod is flush with the corresponding end face of the beam, which makes it easier to press the first sealing ring against the first wall plate, thus reducing the risk of the first sealing element being crushed. In addition, making the end face of the first locking rod protrude from the corresponding end face of the beam facilitates processing and reduces the processing accuracy requirements of the first locking rod and the beam.

[0021] In some embodiments, a ring platform protrudes from the end face of the other end of the first locking rod, the ring platform being used to stop the first wall plate, and the first sealing member being arranged around the ring platform.

[0022] The above technical solution involves setting a ring platform on the end face of the first locking rod and surrounding the first sealing element with the ring platform. The ring platform can be used to position the first sealing element. In addition, the ring platform can limit the distance between the end face of the first locking rod and the first wall plate, thereby reducing the risk of crushing the first sealing element.

[0023] In some embodiments, the first connection hole is a blind hole; and / or, the second connection hole is a blind hole.

[0024] Through the above technical solution, the first connecting hole is designed as a blind hole, which enables physical sealing between the first locking rod and the second locking rod, improving sealing performance and reliability. Similarly, designing the second connecting hole as a blind hole enables physical sealing between the second locking rod and the outside, further improving sealing performance and reliability.

[0025] In some embodiments, the first locking rod and the second locking rod are threaded together.

[0026] The above technical solution uses a threaded connection to connect the first locking rod and the second locking rod, making the connection convenient and the operation simple.

[0027] In some embodiments, the boss is polygonal.

[0028] The above technical solution involves setting the boss in a polygonal shape so that the second locking rod can be operated with a tool to connect the first locking rod and the second locking rod.

[0029] In some embodiments, the first seal is a sealing ring or a sealing gasket.

[0030] Through the above technical solution, the first sealing element uses a sealing ring or sealing gasket, which has a simple structure, low cost, and is easy to assemble, so that the first locking rod holds the first sealing element against the first wall plate, thereby achieving a good seal between the first locking rod and the first wall plate.

[0031] In some embodiments, the second seal is a sealant, a sealing ring, or a sealing gasket.

[0032] The above technical solution allows the second sealing element to use sealant, sealing ring, or sealing gasket, which has a simple structure, low cost, and facilitates a good seal between the boss and the first wall panel.

[0033] 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.

[0034] 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

[0035] 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.

[0036] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0037] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0038] Figure 3 This is an exploded structural diagram of the box body according to some embodiments of this application;

[0039] Figure 4 for Figure 3 A top view of the connection between the beams and the top cover of the middle box girder;

[0040] Figure 5 for Figure 4 Exploded structural diagram of the connection between the central beam and the top cover;

[0041] Figure 6 For along Figure 4 Schematic diagram of the cross-sectional structure of line AA Figure 1 ;

[0042] Figure 7 This is a cross-sectional structural schematic diagram of the connection between the beam and the top cover in some other embodiments of this application;

[0043] Figure 8 for Figure 7 Enlarged view of section B;

[0044] Figure 9 This is a cross-sectional structural schematic diagram of the connection between the beam and the top cover in some embodiments of this application;

[0045] Figure 10 This is a cross-sectional structural diagram of the carrier connected to the box in some embodiments of this application.

[0046] The main markings in the attached figures are as follows:

[0047] 11. Vehicle; 111. Controller; 112. Motor;

[0048] 200. Battery assembly; 20. Housing; 201. First wall panel; 2011. First opening; 21. Top cover; 22. Bottom plate; 23. Frame; 24. Mounting beam; 25. Beam; 2501. Expansion beam; 2502. Longitudinal beam; 251. Through hole; 252. Reception slot; 300. Battery cell;

[0049] 40. Mounting structure; 41. First locking rod; 4101. First end; 4102. Second end; 4103. First end face; 4104. Second end face; 411. First connecting hole; 412. Flange; 413. Ring platform; 42. Second locking rod; 421. Boss; 422. Second connecting hole; 43. First seal; 44. Second seal;

[0050] 51. Carrier; 52. Fastener;

[0051] X, length direction; Y, width direction; Z, height direction. Detailed Implementation

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0057] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] Battery units are commonly used in new energy vehicles to provide them with power. As new energy technologies continue to develop, the requirements for the driving range of electric vehicles are increasing, leading to larger battery unit sizes and higher performance requirements. In addition to the frame connecting the battery pack to the vehicle, the battery unit often incorporates beams to enhance its structural strength. Furthermore, mounting structures are installed on these beams to connect the battery unit to the vehicle, further strengthening the connection between the battery unit and the vehicle.

[0066] In related technologies, mounting structures often employ a top sleeve, an adapter sleeve, a long sleeve, a bottom sleeve, and multiple seals. The long sleeve and bottom sleeve clamp the bottom of the housing, with sealing rings on both sides of the bottom for sealing. The top sleeve and adapter sleeve clamp the top of the housing, with sealing rings on both sides of the top for sealing. The long sleeve passes through the beam and connects to the top sleeve. This mounting structure involves sealing and fitting numerous parts, making assembly inconvenient and increasing the risk of seal failure.

[0067] Based on the above considerations, in order to improve the problem of high risk of seal failure at the mounting structure of battery devices in related technologies, this application provides a battery device. By setting beams within the housing, the structural strength of the housing is improved to stably support the individual battery cells. A first locking rod is fixedly connected to the beam to support the beam. A first connecting hole is provided on the first locking rod, and a boss is provided on the second locking rod. A first opening is provided on the first wall panel for the second locking rod to pass through and connect to the first connecting hole on the first locking rod. The bosses on the first and second locking rods engage to clamp the first wall panel, and a first sealing element abuts against the inner surface of the first wall panel. The second sealing element seals the area between the boss and the outer surface of the first wall panel, achieving a sealed connection between the mounting structure and the first wall panel. This provides good sealing reliability, uses fewer parts, and is simple and convenient to assemble. A second connecting hole is provided on the second locking rod to connect fasteners, facilitating the installation of the carrier onto the housing.

[0068] 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.

[0069] 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.

[0070] The technical solutions described in the embodiments of this application are applicable to various power devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0071] For ease of explanation, an electrical device is provided in one embodiment of this application, with a vehicle as an example.

[0072] 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.

[0073] 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.

[0074] 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 connections via a busbar.

[0075] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 300.

[0076] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 300 together. As another example, a battery module can be formed by bundling multiple battery cells 300 together with cable ties.

[0077] In some embodiments, the battery device 200 may be a battery pack, which includes a housing 20 and one or more individual battery cell assemblies housed within the housing 20.

[0078] 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.

[0079] 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.

[0080] In some embodiments, the housing 20 may include a top cover 21, a frame 23, and a bottom plate 22. The top cover 21 and the bottom plate 22 are respectively connected to opposite sides of the frame 23, forming a closed space inside the housing 20 to accommodate the battery cells 300. The frame 23 refers to the partial structure forming the peripheral sidewalls of the housing 20. The top cover 21 refers to the plate-like structure forming the top of the housing 20, and the top cover 21 can be made of materials such as plastic, carbon fiber, fiberglass, aluminum alloy, and steel. The bottom plate 22 refers to the plate-like structure forming the bottom of the housing 20, and the bottom plate 22 can be made of materials such as plastic, carbon fiber, fiberglass, aluminum alloy, and steel.

[0081] In some embodiments, the frame 23 is formed by connecting multiple beams, resulting in a simple structure that is easy to manufacture. The frame 23 can be made of materials such as aluminum alloy or steel. Of course, the frame 23 can also be made of composite materials such as carbon fiber or glass fiber. In some embodiments, the frame 23 can also be formed by roll forming of sheet metal.

[0082] In some embodiments, the housing 20 may include a first housing and a second housing, which are fastened together to form a closed space inside the housing 20 to accommodate the battery cells 300. Here, "closed" refers to covering or shutting down, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate of the housing 20. Both the first and second housings may also be hollow structures with an opening on one side, with the opening side of the first housing fitting over the opening side of the second housing.

[0083] In some embodiments, the housing 20 includes a mounting beam 24, which is fixedly connected to the frame 23 for connecting external devices using the battery device 200 and supporting the battery device 200 on those devices. The mounting beam 24 also enhances the structural strength of the housing 20. The mounting beam 24 can be made of materials such as carbon fiber, fiberglass, aluminum alloy, or steel.

[0084] Please see Figure 2 The housing 20 has a length direction X, a width direction Y, and a height direction Z. Since the housing 20 defines the shape of the battery device 200, the length direction X is also the length direction of the battery device 200, the width direction Y is also the width direction of the battery device 200, and the height direction Z is also the height direction of the battery device 200.

[0085] In some embodiments, mounting beams 24 may be provided on opposite sides of the frame 23 to connect external support media. For example, mounting beams 24 may be provided at opposite ends of the frame 23 along the length direction X. For example, mounting beams 24 may be provided at opposite ends of the frame 23 along the width direction Y.

[0086] In some embodiments, mounting beams 24 may be provided on three sides of the frame 23 to connect to external support media.

[0087] In some embodiments, mounting beams 24 may be provided on each side of the frame 23 to connect to the external support medium.

[0088] In some embodiments, the housing 20 may be part of the chassis structure of the vehicle 11. For example, a portion of the housing 20 may be at least a portion of the floor of the vehicle 11, or a portion of the housing 20 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 11.

[0089] Please see Figures 2 to 10 According to some embodiments of this application, a battery device 200 is provided, including a housing 20, a battery cell 300, a beam 25, and a mounting structure 40. The battery cell 300 is installed in the housing 20, and the beam 25 is installed in the housing 20. The housing 20 includes a first wall panel 201 disposed on one side along the height direction Z of the beam 25, and a first opening 2011 is provided on the first wall panel 201 corresponding to the position of the beam 25. The mounting structure 40 includes a first sealing element 43, a first locking rod 41, a second locking rod 42, and a second sealing element 44. The first sealing element 43 is disposed on the inner side of the first wall panel 201 and surrounds the first beam 25. An opening 2011 is provided; one end of the first locking rod 41 is fixedly connected to the beam 25, and the other end holds the first sealing member 43 against the first wall panel 201. The other end of the first locking rod 41 is provided with a first connecting hole 411; one end of the second locking rod 42 has a boss 421 protruding from its circumference, and the other end passes through the first opening 2011 and is fixed to the first connecting hole 411, so that the boss 421 abuts against the first wall panel 201 on the side facing the first sealing member 43. One end of the second locking rod 42 is provided with a second connecting hole 422 for connecting the fastener 52 of the carrier 51; the second sealing member 44 seals the gap between the boss 421 and the first wall panel 201.

[0090] Battery device 200 refers to a device used to increase electrical energy. Housing 20 refers to a structure with internal space to house battery cells 300 and forming the outer shell of battery device 200. Battery cell 300 refers to the smallest charging / discharging unit in battery device 200.

[0091] Beam 25 refers to the beam member in box 20 used to increase the structural strength of box 20. Beam 25 can be made of materials such as carbon fiber, fiberglass, aluminum alloy, or steel. For example, beam 25 can be connected to frame 23 to fix beam 25 in box 20. For example, beam 25 can be connected to bottom plate 22 of box 20 to fix beam 25 in box 20. For example, beam 25 can be connected to top cover 21 of box 20 to fix beam 25 in box 20. For example, beam 25 can be fixedly connected to one or more of frame 23, bottom plate 22, and top cover 21 of box 20 to fix beam 25 in box 20. Beam 25 is fixed in box 20, and the height direction Z of beam 25 is consistent with the height direction Z of box 20.

[0092] As an example, the length direction of beam 25 can be parallel to the length direction X of box 20. For example, beam 25 may include longitudinal beams 2502. Longitudinal beams 2502 refer to beams extending along the length direction X of box 20. As an example, the length direction of beam 25 can be parallel to the width direction Y of box 20. For example, beam 25 may include transverse beams. Transverse beams refer to beams extending along the width direction Y of box 20. As an example, the length direction of beam 25 can also be inclined to the length direction X of box 20. As an example, box 20 may contain one beam 25 or multiple beams 25. As an example, box 20 may contain only transverse beams. As an example, box 20 may also contain only longitudinal beams 2502. As an example, box 20 may also contain both transverse beams and longitudinal beams 2502.

[0093] In some embodiments, the beam 25 may also be a structure used to divide the internal space of the box 20.

[0094] In some embodiments, the beam 25 may further include an expansion beam 2501. Optionally, at least two expansion beams 2501 are provided, and the at least two expansion beams 2501 are spaced apart within the housing 20. The battery cell 300 is clamped between the at least two expansion beams 2501 so that the battery cell 300 is clamped by the cooperation of the at least two expansion beams 2501.

[0095] The expansion beam 2501 is a component used to limit the expansion of the battery cell 300. The expansion beam 2501 can be a metal component; that is, the material of the expansion beam 2501 is a metal, such as aluminum, aluminum alloy, iron, stainless steel, copper, etc., without specific limitations. Of course, the expansion beam 2501 can also be a non-metallic component; that is, the material of the expansion beam 2501 is a non-metal, such as plastic, carbon fiber, wood, etc., without specific limitations. Furthermore, when at least two expansion beams 2501 are provided, the materials of the at least two expansion beams 2501 can be the same or different.

[0096] When some of the multiple battery cells 300 expand, the expansion force acts on the expansion beams 2501 on both sides, causing the expansion beams 2501 to generate a compressive force on the battery cells 300, thereby limiting the expansion of the battery cells 300 and improving the safety performance of the battery.

[0097] The first wall panel 201 refers to a side wall structure of the housing 20, and this side wall is located on one side of the beam 25 along the height direction Z. As an example, if the housing 20 includes a top cover 21 and a bottom plate 22, the first wall panel 201 can be either the top cover 21 or the bottom plate 22. As an example, if the first wall panel 201 is the top cover 21, the mounting structure 40 is connected to the top cover 21, and in application, the top of the housing 20 is connected to the carrier 51, such as connecting the top of the housing 20 to a vehicle. As an example, if the first wall panel 201 is the bottom plate 22, the mounting structure 40 is connected to the bottom plate 22, and in application, the bottom plate 22 of the housing 20 is connected to the carrier 51, such as connecting the bottom plate 22 of the housing 20 to a vehicle. As an example, if the housing 20 includes a first housing 20 and a second housing 20, the first wall panel 201 can be the top area of ​​the first housing 20, or the first wall panel 201 can be the bottom area of ​​the second housing 20.

[0098] The first opening 2011 refers to the hole structure that is opened on the first wall panel 201.

[0099] The mounting structure 40 refers to the connection structure located in the middle area of ​​the box 20, used to connect the carrier 51 so that the box 20 can be installed on the carrier 51.

[0100] The first sealing element 43 refers to the structure used for sealing. The first sealing element 43 can be a structural component such as a rubber component or a silicone component.

[0101] The first locking rod 41 refers to the structural component in the mounting structure 40 used to fix itself to the beam 25 and to support the first wall panel 201. The first locking rod 41 can be a screw, sleeve, nut, bolt, or other structural component, as long as it can be connected to the beam 25 and fixedly connected with the second locking rod 42. The cross-sectional outline of the first locking rod 41 can be circular, elliptical, triangular, quadrilateral, pentagonal, or other shapes. The cross-section of the first locking rod 41 refers to the section perpendicular to the height direction Z. The first locking rod 41 can be made of materials such as aluminum alloy, steel, or plastic.

[0102] The fixed connection between one end of the first locking rod 41 and the beam 25 means that one end of the first locking rod 41 is fixed to the beam 25. For example, one end of the first locking rod 41 can be fixed to the beam 25 by welding, threaded connection, snap-fit, adhesive or other methods.

[0103] One end of the first locking rod 41 refers to the end where the first locking rod 41 connects to the beam 25. The other end of the first locking rod 41 refers to the end of the first locking rod 41 near the first wall panel 201. For ease of description, the two opposite ends of the first locking rod 41 are defined as the first end 4101 and the second end 4102, respectively. One end of the first locking rod 41 is the first end 4101, and the other end of the second locking rod 42 is the second end 4102. The end face of one end of the first locking rod 41 is the first end face 4103, and the end face of the other end of the first locking rod 41 is the second end face 4104.

[0104] The first connecting hole 411 refers to the hole structure provided on the first locking rod 41. The first connecting hole 411 at the other end of the first locking rod 41 means that the first connecting hole 411 penetrates the end face 4102 of the second end of the first locking rod 41, that is, the first connecting hole 411 penetrates the second end face 4104. The depth direction of the first connecting hole 411 is parallel to the length direction of the first locking rod 41. When the first locking rod 41 is installed in the housing 20, the depth direction of the first connecting hole 411 is parallel to the height direction Z of the housing 20, and the length direction of the first locking rod 41 is also parallel to the height direction Z of the housing 20.

[0105] The other end of the first locking rod 41 holds the first sealing element 43 against the first wall panel 201, which means that the second end 4102 of the first locking rod 41 holds the first sealing element 43 against the first wall panel 201 to achieve a seal between the first end 4101 of the first locking rod 41 and the first wall panel 201.

[0106] The second locking rod 42 refers to a structure used to connect with the first locking rod 41 and partially extend into the outside of the first wall panel 201. The second locking rod 42 can be a screw, sleeve, nut, bolt, or other structural component, as long as it can connect to and cooperate with the first locking rod 41 to clamp the first wall panel 201. The second locking rod 42 can be made of materials such as aluminum alloy, steel, or plastic.

[0107] The boss 421 refers to the structural part that protrudes from the second locking rod 42. The boss 421 protruding from the circumference of one end of the second locking rod 42 means that the boss 421 is formed by protruding from the circumferential side of one end of the second locking rod 42, and the boss 421 is arranged around one end of the second locking rod 42. Correspondingly, the projection of the outer contour of the boss 421 along the height direction Z covers the projection of the second locking rod 42 along the height direction Z.

[0108] The other end of the second locking rod 42 passes through the first opening 2011 and is fixed to the first connecting hole 411. This means that the end of the second locking rod 42 away from the boss 421 passes through the first opening 2011 and extends into the first connecting hole 411, while the other end of the second locking rod 42 is fixed in the first connecting hole 411, thereby achieving the connection and fixation between the first locking rod 41 and the second locking rod 42. The second locking rod 42 can be connected to the first locking rod 41 by means of threaded connection, snap-fit, etc.

[0109] The outer side of the first wall panel 201 refers to the side of the first wall panel 201 that faces away from the interior of the housing 20, and the corresponding outer side of the first wall panel 201 is also the outer surface of the first wall panel 201. The inner side of the first wall panel 201 refers to the side of the first wall panel 201 that faces the interior of the housing 20, and the corresponding inner side of the first wall panel 201 is also the inner surface of the first wall panel 201.

[0110] The boss 421 abutting against the first wall plate 201 on the side facing the first seal 43 means that the boss 421 abuts against the outer surface of the first wall plate 201.

[0111] Since the boss 421 is located on the outer side of the first wall panel 201 and the first locking rod 41 is located on the inner side of the first wall panel 201, and the first locking rod 41 is connected to the second locking rod 42, the boss 421 and the second end face 4104 of the first locking rod 41 cooperate to clamp the first wall panel 201. The first sealing member 43 is located on the inner side of the first wall panel 201 and is arranged around the first opening 2011. The first sealing member 43 is located between the second end face 4104 and the first wall panel 201, so that the boss 421 and the second end face 4104 cooperate to clamp the first wall panel 201 and the first sealing member 43, so that the two sides of the first sealing member 43 respectively abut against the inner surface of the first wall panel 201 and the second end face 4104 to seal the gap between the second end face 4104 and the first wall panel 201, thereby achieving a seal between the first locking rod 41 and the first wall panel 201.

[0112] The second connecting hole 422 refers to the hole structure provided on the second locking rod 42. The second connecting hole 422, which is provided at one end of the second locking rod 42 for connecting the fastener 52 of the carrier 51, means that the second connecting hole 422 is located at one end of the second locking rod 42 and is used to connect the fastener 52, thereby connecting and fixing the second locking rod 42 to the carrier 51, so as to realize the installation of the carrier 51 on the housing 20.

[0113] Fastener 52 is a connecting structural component used to connect carrier 51 to housing 20. For example, if the second connecting hole 422 has internal threads, fastener 52 can be a bolt, threaded rod, or other structural component. For example, if the second connecting hole 422 is a gradually expanding hole along the depth direction, or if the second connecting hole 422 has a constricted opening, fastener 52 can be a rivet, such as a rivet bolt or rivet.

[0114] In some embodiments, the carrier 51 may be a vehicle 11 to mount the battery device 200 on the vehicle 11. In some embodiments, the carrier 51 may also be externally connected to a beam frame to mount the beam frame on the outside of the housing 20 of the battery device 200 to improve the structural strength of the battery device 200.

[0115] The second sealing element 44 seals the gap between the boss 421 and the first wall plate 201. This means that the second sealing element 44 fills the gap between the boss 421 and the first wall plate 201 to seal the gap between the boss 421 and the first wall plate 201.

[0116] The first sealing element 43 seals the connection between the first locking rod 41 and the first wall panel 201, while the second sealing element 44 seals the connection between the boss 421 of the second locking rod 42 and the first wall panel 201. This seals the connection between the mounting structure 40 and the first wall panel 201, resulting in fewer sealing interfaces and better sealing reliability at the connection between the mounting structure 40 and the box 20. The first locking rod 41 is fixedly connected to the beam 25, and the second locking rod 42 is fixed in the first connecting hole 411 of the first locking rod 41. The first sealing element 43 and the second sealing element 44 can then be clamped between the opposite sides of the first opening 2011 of the first wall panel 201. This method uses fewer parts and is simple and convenient to assemble.

[0117] In the technical solution of this application embodiment, the first locking rod 41 is fixedly connected to the beam 25, and the second locking rod 42 is installed in the first connecting hole 411 of the first locking rod 41, so that the boss 421 of the second locking rod 42 cooperates with the first locking rod 41 to clamp the first wall plate 201 of the box 20, and the first sealing member 43 seals the first locking rod 41 and the first wall plate 201, and the second sealing member 44 seals the boss 421 and the first wall plate 201, so as to achieve the sealing between the mounting structure 40 and the first wall plate 201, and thus achieve the sealing at the connection between the mounting structure 40 and the box 20. The sealing reliability is good, and fewer parts are used, and the assembly is simple and convenient. The second locking rod 42 is provided with a second connecting hole 422, which can be easily connected with the fastener 52 of the carrier 51 to achieve the connection and fixation between the carrier 51 and the box 20.

[0118] In some embodiments, please refer to Figures 5 to 9 The first locking rod 41 passes through the beam 25 along the height direction Z. The beam 25 has a through hole 251 through which the first locking rod 41 passes. One end of the first locking rod 41 is connected to the side of the beam 25 away from the first wall panel 201.

[0119] Through hole 251 refers to the hole structure provided on beam 25, and the hole structure penetrates through the opposite sides of beam 25 along the height direction Z.

[0120] The through hole 251 of the beam 25 for the first locking rod 41 to pass through means that the beam 25 is provided with a through hole 251, and the first locking rod 41 can be installed through the through hole 251.

[0121] The first locking rod 41 passing through the beam 25 along the height direction Z means that the first locking rod 41 extends along the height direction Z and passes through the beam 25.

[0122] The connection between one end of the first locking rod 41 and the side of the beam 25 away from the first wall panel 201 means that one end of the first locking rod 41 is fixedly connected to the side of the beam 25 away from the first wall panel 201, so as to achieve a fixed connection between the first locking rod 41 and the beam 25.

[0123] By using the above technical solution, a through hole 251 is provided on the beam 25, and the first locking rod 41 passes through the beam 25, which facilitates the positioning of the first locking rod 41 and the fixed connection between the first locking rod 41 and the beam 25.

[0124] In some embodiments, the first locking rod 41 may also be fixedly connected to the side of the beam 25 near the first wall panel 201. As an example, the first locking rod 41 may be welded to the side of the beam 25 near the first wall panel 201. Alternatively, an insertion hole may be provided on the side of the beam 25 near the first wall panel 201, into which the first locking rod 41 may be inserted and fixedly connected to the first beam 25 by bonding or welding.

[0125] In some embodiments, please refer to Figures 5 to 9 One end of the first locking rod 41 is provided with a flange 412, and the beam 25 is supported on the flange 412.

[0126] Flange 412 refers to the disc-shaped or annular structure that is provided at the first end 4101 of the first locking rod 41 and surrounds the first locking rod 41. A flange 412 is provided at one end of the first locking rod 41, and correspondingly, the projection of the outer contour of the flange 412 along the height direction Z covers the projection of the first locking rod 41 along the height direction Z.

[0127] The beam 25 being supported on the flange 412 means that the flange 412 supports the beam 25, which in turn supports the beam 25 on the first locking rod 41.

[0128] Since the first locking rod 41 passes through the beam 25, and the flange 412 is located at the first end 4101 of the first locking rod 41, the first locking rod 41 passes through the beam 25, allowing the side of the beam 25 above the through hole 251 to be supported on the flange 412, thus achieving a good connection and fixation between the beam 25 and the first locking rod 41. During assembly, the second end 4102 of the first locking rod 41 can be inserted into the through hole 251 and pass through the through hole 251 to connect with the second locking rod 42, making assembly convenient.

[0129] With the above technical solution, a flange 412 is provided on the first locking rod 41. The first locking rod 41 passes through the beam 25, which makes it easy to support the beam 25 on the flange 412, and then support the beam 25 on the first locking rod 41.

[0130] In some embodiments, the first end 4101 of the first locking rod 41 can be directly welded to the end of the beam 25 away from the first wall panel 201 to achieve the connection and fixation between the first locking rod 41 and the beam 25.

[0131] In some embodiments, the first locking rod 41 can be bonded or welded to the inner wall of the through hole 251 to achieve the connection and fixation of the first locking rod 41 and the beam 25.

[0132] In some embodiments, please refer to Figures 5 to 9 The beam 25 is welded to the flange 412.

[0133] The beam 25 can be welded to the flange 412 using welding methods such as spot welding, argon arc welding, laser welding, and friction welding to improve the strength and reliability of the connection between the beam 25 and the flange 412.

[0134] The above technical solution can improve the connection strength between the beam 25 and the first locking rod 41, and the connection is simple and highly reliable.

[0135] In some embodiments, please refer to Figure 9 The beam body 25 has a receiving groove 252 for receiving flange 412 on the side opposite to the first wall panel 201.

[0136] The receiving groove 252 refers to the groove structure set on the beam 25.

[0137] The accommodating groove 252 for the flange 412 on the side of the beam 25 away from the first wall panel 201 means that the accommodating groove 252 is located on the side of the beam 25 away from the first wall panel 201, and when the first locking rod 41 is inserted into the through hole 251 of the beam 25, the flange 412 of the first end 4101 can extend into the accommodating groove 252.

[0138] Since the flange 412 is located at the first end 4101 of the first locking rod 41, when the first locking rod 41 is connected to the beam 25, placing the flange 412 in the receiving groove 252 can prevent the flange 412 from protruding from the side of the beam 25 away from the first wall panel 201, thereby reducing the gap between the beam 25 and the box 20 on the side away from the first wall panel 201. In addition, the receiving groove 252 can also be used to position the flange 412 to facilitate the connection and fixation of the first locking rod 41 and the beam 25.

[0139] By using the above technical solution, a receiving groove 252 is provided on the beam 25, which can not only position the flange 412, but also accommodate the flange 412 so that the side of the beam 25 away from the first wall panel 201 can be connected to the box body 20.

[0140] In some embodiments, please refer to Figures 5 to 9 The other end of the first locking rod 41 protrudes from the beam 25, or the other end of the first locking rod 41 is flush with the end of the beam 25 near the first wall panel 201.

[0141] The other end face of the first locking rod 41 refers to the second end face 4104 of the first locking rod 41.

[0142] Please see Figure 7 and Figure 8 The fact that the other end face of the first locking rod 41 protrudes from the beam 25 means that the second end face 4104 of the first locking rod 41 protrudes from the side of the beam 25 closest to the first wall plate 201. This makes the distance between the second end face 4104 and the first wall plate 201 smaller than the distance between the beam 25 and the first wall plate 201. The protrusion of the second end face 4104 from the beam 25 reduces the dimensional accuracy requirements in the relative height direction Z between the first locking rod 41 and the beam 25, facilitating manufacturing. Additionally, it facilitates the second end face 4104 in holding the first sealing element 43 against the first wall plate 201, and allows for better control of the pressure exerted by the second end face 4104 on the first sealing element 43, reducing the risk of crushing the first sealing element 43 and achieving a good seal between the second end face 4104 and the first wall plate 201.

[0143] Please see Figure 6 and Figure 9 The fact that the end face of the other end of the first locking rod 41 is flush with the end face of the beam 25 near the first wall plate 201 means that the second end face 4104 of the first locking rod 41 and the end face of the beam 25 near the first wall plate 201 are on the same plane. This structure allows the beam 25 and the second end face 4104 to simultaneously abut against the first sealing member 43, thereby increasing the area of ​​abutting against the first sealing member 43 and effectively controlling the force of the second end face 4104 against the first sealing member 43, reducing the risk of the first sealing member 43 being crushed, and achieving a good seal between the second end face 4104 and the first wall plate 201.

[0144] In some embodiments, please refer to Figures 5 to 9 A ring platform 413 protrudes from the end face of the other end of the first locking rod 41. The ring platform 413 is used to stop the first wall plate 201. The first sealing member 43 is arranged around the ring platform 413.

[0145] The other end face of the first locking rod 41 refers to the second end face 4104 of the first locking rod 41.

[0146] The annular platform 413 refers to the protruding, annular portion of the second end face 4104. Since the second end 4102 of the first locking rod 41 is provided with the first connecting hole 411, the second end face 4104 is annular, and the annular platform 413 on the second end face 4104 is arranged in an annular shape around the first connecting hole 411.

[0147] The ring platform 413 is used to stop the first wall plate 201. This means that when the first locking rod 41 is connected to the second locking rod 42, the second end face 4104 of the first locking rod 41 moves toward the first wall plate 201, and the ring platform 413 abuts against the first wall plate 201, it stops the first wall plate 201, thereby limiting the distance between the second end face 4104 and the first wall plate 201.

[0148] The first seal 43 is arranged around the ring platform 413, meaning that the first seal 43 is fitted onto the ring platform 413. The ring platform 413 positions the first seal 43 so that during assembly, the second end face 4104 moves toward the first wall plate 201, allowing the second end face 4104 to hold the first seal 43 against the first wall plate 201. The limiting effect of the ring platform 413 on the first wall plate 201 can reduce the risk of crushing the first seal 43, thereby maintaining good sealing performance between the first wall plate 201 and the second end face 4104.

[0149] Through the above technical solution, an annular platform 413 is provided on the end face of the first locking rod 41, and the first sealing member 43 is arranged around the annular platform 413. The first sealing member 43 can be positioned by the annular platform 413. In addition, the arrangement of the annular platform 413 can limit the distance between the end face of the first locking rod 41 and the first wall plate 201, thereby reducing the risk of crushing the first sealing member 43.

[0150] In some embodiments, please refer to Figures 5 to 9 The first connecting hole 411 is a blind hole.

[0151] A blind hole is a hole structure that is closed at one end.

[0152] The first connecting hole 411 on the first locking rod 41 is set as a blind hole, which can achieve physical isolation and sealing between the bottom of the first connecting hole 411 and the inside of the housing 20, thereby improving sealing performance and reliability.

[0153] In some embodiments, the second connection hole 422 is a blind hole.

[0154] The second connecting hole 422 is designed as a blind hole, which can achieve physical isolation and sealing between the second locking rod 42 and the outside, thereby improving sealing performance and reliability.

[0155] In some embodiments, please refer to Figures 5 to 9Both the first connecting hole 411 and the second connecting hole 422 are blind holes. With this structural design, the interior of the second connecting hole 422 can be physically isolated and sealed from the interior of the housing 20. The communication interval between the interior and exterior of the housing 20 from the first wall panel 201 is only between the second end face 4104 of the first wall panel 201 and the first locking rod 41, the connection gap between the first locking rod 41 and the second locking rod 42, and the boss 421 of the first wall panel 201 and the second locking rod 42. A first sealing element 43 is provided between the first wall panel 201 and the second end face 4104 of the first locking rod 41, and a second sealing element 44 is provided between the first wall panel 201 and the boss 421 of the second locking rod 42. Therefore, the interior of the housing 20 communicates with the exterior at the mounting structure 40 through at least two sealing interfaces, resulting in better sealing performance.

[0156] In some embodiments, please refer to Figures 5 to 9 The gap between the first locking rod 41 and the second locking rod 42 can be filled with sealant. For example, if sealant is applied to the other end of the second locking rod 42 and the other end of the second locking rod 42 is inserted into and fixed in the first connecting hole 411 of the first locking rod 41, the sealant will seal the gap between the first locking rod 41 and the second locking rod 42 to improve the sealing performance.

[0157] In some embodiments, please refer to Figures 5 to 9 The first locking rod 41 and the second locking rod 42 are threaded together.

[0158] Since the other end of the second locking rod 42 is fixed in the first connecting hole 411 of the first locking rod 41, an internal thread can be provided on the inner wall of the first connecting hole 411, and an external thread can be provided on the other end of the second locking rod 42. The other end of the second locking rod 42 is inserted into the first connecting hole 411 through the first opening 2011 of the first wall plate 201, and the second locking rod 42 is rotated to realize the threaded connection of the other end of the second locking rod 42 to the first connecting hole 411. The operation is simple and the connection is convenient.

[0159] In some embodiments, please refer to Figures 3 to 9 The boss 421 is polygonal.

[0160] A polygon is a shape that has at least three sides.

[0161] The term "polygonal" for boss 421 means that the outer contour of boss 421 is polygonal, that is, the cross-section of boss 421 is polygonal. The cross-section of boss 421 refers to the section of boss 421 perpendicular to the height direction Z.

[0162] The above technical solution allows the boss 421 to be polygonal so that the second locking rod 42 can be operated with a tool to connect the first locking rod 41 and the second locking rod 42.

[0163] In some embodiments, please refer to Figures 3 to 9 The first sealing element 43 is a sealing ring or a sealing gasket.

[0164] A sealing ring is a mechanical component used to prevent the leakage of liquids or gases. It is typically made of rubber, silicone, polyurethane, or other elastic materials. Sealing rings can include O-rings, Y-rings, V-rings, etc.

[0165] A gasket is a material or component used to fill the gap between two objects to prevent the leakage of fluids or gases. It is usually made of rubber, silicone, graphite or other flexible materials.

[0166] Through the above technical solution, the first sealing element 43 uses a sealing ring or sealing gasket, which has a simple structure, low cost, and is easy to assemble, so that the first locking rod 41 holds the first sealing element 43 against the first wall plate 201, thereby achieving a good seal between the first locking rod 41 and the first wall plate 201.

[0167] In some embodiments, please refer to Figures 3 to 9 The second sealing element 44 is a sealant, a sealing ring, or a sealing gasket.

[0168] Sealant is a material used to fill and seal joints, gaps, or interfaces. It typically exists in liquid, paste, or semi-solid form and cures into an elastomer or hard solid after application through chemical reactions or physical changes. Sealants can be classified into various types based on their material, such as silicone sealant, polyurethane sealant, acrylic sealant, and butyl rubber sealant. The second sealing element 44 uses sealant. During the assembly of the second locking rod 42, sealant can be applied to the boss 421. When the second locking rod 42 is connected to the first locking rod 41, the boss 421 abuts against the first wall panel 201. The sealant on the boss 421 fills the gap between the boss 421 and the first wall panel 201, and after curing, seals the gap between the boss 421 and the first wall panel 201.

[0169] Through the above technical solution, the second sealing element 44 uses sealant, sealing ring or sealing gasket, which has a simple structure, low cost and facilitates a good seal between the boss 421 and the first wall plate 201.

[0170] According to some embodiments of this application, this application provides a battery device 200, including a housing 20, a battery cell 300, a beam 25, and a mounting structure 40; the battery cell 300 is installed in the housing 20, the beam 25 is installed in the housing 20, the housing 20 includes a first wall panel 201 disposed on one side along the height direction Z of the beam 25, and a first opening 2011 is provided on the first wall panel 201 corresponding to the position of the beam 25; the beam 25 is provided with a through hole 251, and the mounting structure 40 includes a first sealing element 43, a first locking rod 41, a second locking rod 42, and a second sealing element 44; the first sealing element 43 is disposed on the inner side of the first wall panel 201 and is disposed around the first opening 2011; the first locking rod 41 passes through the through hole 251 through the beam 25, and one end of the first locking rod 41 is provided with a flange 412, and the side of the beam 25 away from the first wall panel 201 is welded to the flange 412. The other end of the first locking rod 41 protrudes from the beam 25, or the other end of the first locking rod 41 is flush with the end of the beam 25 near the first wall plate 201. A ring platform 413 protrudes from the other end of the first locking rod 41, which stops the first wall plate 201. The first sealing element 43 surrounds the ring platform 413. The other end of the first locking rod 41 has a first connecting hole 411, which is a blind hole with internal threads on its inner wall. A boss 421 protrudes from the circumference of one end of the second locking rod 42. The other end of the second locking rod 42 has external threads and is threaded into the first connecting hole 411. The other end of the first locking rod 41 holds the first sealing element 43 against the first wall plate 201. The boss 421 holds the first wall plate 201, and the second sealing element 44 seals the gap between the boss 421 and the first wall plate 201. One end of the second locking rod 42 is provided with a second connecting hole 422 for connecting the fastener 52 of the carrier 51. The second connecting hole 422 is a blind hole and the inner wall of the second connecting hole 422 is provided with threads.

[0171] The flange 412 of the first locking rod 41 is welded and fixedly connected to the beam 25. The second locking rod 42 is installed in the first connecting hole 411 of the first locking rod 41, so that the boss 421 of the second locking rod 42 cooperates with the first locking rod 41 to clamp the first wall plate 201 of the box 20. The first sealing member 43 seals the first locking rod 41 and the first wall plate 201, and the second sealing member 44 seals the boss 421 and the first wall plate 201, so as to achieve the sealing between the mounting structure 40 and the first wall plate 201, and thus achieve the sealing at the connection between the mounting structure 40 and the box 20. The sealing reliability is good, and fewer parts are used, making assembly simple and convenient. The second locking rod 42 is provided with a second connecting hole 422, which can be easily connected with the fastener 52 of the carrier 51 to achieve the connection and fixation between the carrier 51 and the box 20. A ring platform 413 is provided on the end face of the first locking rod 41, around which the first sealing element 43 is positioned. The ring platform 413 also limits the distance between the end face of the first locking rod 41 and the first wall plate 201, thus reducing the risk of crushing the first sealing element 43. Both the first connecting hole 411 and the second connecting hole 422 are blind holes. The interior of the housing 20 communicates with the outside at the mounting structure 40, requiring at least two sealing interfaces for better sealing performance.

[0172] 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.

[0173] 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, battery cells, beams, and a mounting structure; the battery cells are installed in the housing, the beams are installed in the housing, and the housing includes a first wall panel on one side along the height direction of the beams, with a first opening on the first wall panel corresponding to the position of the beams; The mounting structure includes: The first sealing element is disposed on the inner side of the first wall panel and surrounding the first opening; The first locking rod has one end fixedly connected to the beam body, and the other end holds the first sealing element against the first wall panel. The other end of the first locking rod is provided with a first connecting hole. The second locking rod has a boss protruding from the periphery of one end, and the other end passes through the first opening and is fixed to the first connecting hole, so that the boss abuts against the first wall plate on the side facing the first seal. One end of the second locking rod is provided with a second connecting hole for fasteners for connecting the carrier. The second seal seals the gap between the boss and the first wall panel.

2. The battery device as claimed in claim 1, characterized in that, The first locking rod passes through the beam along the height direction, and the beam has a through hole through which the first locking rod passes. One end of the first locking rod is connected to the side of the beam opposite to the first wall panel.

3. The battery device as claimed in claim 2, characterized in that, One end of the first locking rod is provided with a flange, and the beam is supported on the flange.

4. The battery device as claimed in claim 3, characterized in that, The beam is welded to the flange.

5. The battery device as described in claim 3 or 4, characterized in that, The beam body has a receiving groove for accommodating the flange on the side opposite to the first wall panel.

6. The battery device according to any one of claims 1-4, characterized in that, The end face of the other end of the first locking rod protrudes from the beam, or the end face of the other end of the first locking rod is flush with the end face of the beam near the first wall panel.

7. The battery device as claimed in claim 6, characterized in that, A ring platform protrudes from the end face of the other end of the first locking rod. The ring platform is used to stop the first wall plate, and the first sealing member is arranged around the ring platform.

8. The battery device according to any one of claims 1-4 and 7, characterized in that, The first connecting hole is a blind hole; and / or, the second connecting hole is a blind hole.

9. The battery device according to any one of claims 1-4 and 7, characterized in that, The first locking rod and the second locking rod are threaded together.

10. The battery device according to any one of claims 1-4 and 7, characterized in that, The boss is polygonal.

11. The battery device according to any one of claims 1-4 and 7, characterized in that, The first sealing element is a sealing ring or a sealing gasket.

12. The battery device according to any one of claims 1-4 and 7, characterized in that, The second sealing element is a sealant, a sealing ring, or a sealing gasket.

13. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-12, the battery device being used to store or provide electrical energy.

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