Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a box body, a functional part, a mounting beam and at least one mounting part, the box body is provided with a frame defining a containing space, and the containing space is used for containing a battery monomer; the mounting piece is arranged outside the containing space and is welded to the frame to form a weld joint, and the surface of the weld joint is covered with a first bonding layer. The mounting beams are arranged on at least one side of the frame in the first direction, and the mounting pieces are arranged on at least one side of the frame in the second direction. The function part is arranged on at least one side of the frame in the second direction and located outside the containing space. The first bonding layer can reinforce the welding seam, and the connecting strength between the mounting piece and the frame is improved. In addition, the first bonding layer covers the surface of the weld joint, and the corrosion resistance of the weld joint can be improved. According to the battery device, the mounting strength of the battery device can be improved, the mounting failure risk is reduced, and the mounting stability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and in particular to battery devices and power-consuming devices. Background Art

[0002] New energy batteries are increasingly widely used in life and industries. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the energy storage field and so on.

[0003] In new energy vehicles equipped with batteries, the batteries can be used to provide power wholly or partially. In the energy storage field, the batteries can be installed in an energy storage box or directly installed on the user side. In these application scenarios, the batteries can be mounted on a vehicle. With the continuous increase in demand, the industry's requirements for the mounting strength of the batteries are also constantly improving. Therefore, how to improve the mounting strength of the batteries is one of the research topics in the industry. Summary of the Utility Model

[0004] To solve the above technical problems, this application provides a battery device and a power-consuming device.

[0005] This application is implemented through the following technical solutions.

[0006] In a first aspect of an embodiment of this application, a battery device is provided, including a box body, a functional component, a mounting beam, and at least one mounting member. The box body has a frame defining an accommodation space for accommodating battery cells. The mounting member is disposed outside the accommodation space and is welded to the frame to form a weld seam, and a first adhesive layer covers the surface of the weld seam. The mounting beam is disposed on at least one side of the frame along a first direction, and the mounting member is disposed on at least one side of the frame along a second direction. The functional component is disposed on at least one side of the frame along the second direction and is located outside the accommodation space. The first direction, the second direction, and the direction of gravity are perpendicular to each other.

[0007] Since the mounting member is fixed to the frame by welding and the first adhesive layer covers the surface of the weld seam, the first adhesive layer can reinforce the weld seam and improve the connection strength between the mounting member and the frame. In addition, the first adhesive layer covers the surface of the weld seam, preventing the weld seam from directly contacting corrosive media in the external environment, improving the corrosion resistance of the weld seam, reducing the weakening of the welded connection by corrosive media to a certain extent, and reducing the risk of weld seam cracking and failure. At the same time, the mounting members can be installed at multiple points on the frame, avoiding the functional components of the battery device, improving the installation flexibility, and the mounting members and the mounting beam are used in cooperation to adapt to different mounting environments.

[0008] In some embodiments, the mounting member includes a first mounting plate and a second mounting plate connected to each other. The first mounting plate includes a first plate segment, a second plate segment, and a third plate segment, and the first plate segment, the second plate segment, and the third plate segment are connected in sequence. The first plate segment and the third plate segment are respectively connected to the second mounting plate, and the second plate segment and the second mounting plate are stacked in the direction of gravity. At least one of the first plate segment, the second plate segment, the third plate segment, and the second mounting plate is welded to the frame to form the weld seam.

[0009] Thus, the mounting member has a simple structure and is easy to assemble. Each plate end can be welded to the frame, improving the stress condition of the mounting member and further enhancing the connection strength between the mounting member and the frame. In addition, the second half segment and the second mounting plate can provide a plane for mounting, facilitating the mounting of the battery device.

[0010] In some embodiments, the mounting member includes a sleeve. A first through hole is formed in the second plate segment, and a second through hole is formed in the second mounting plate. The sleeve is inserted through the first through hole and the second through hole.

[0011] Since the mounting member further includes a sleeve, it is convenient to position during mounting, improving the mounting accuracy of the battery device and facilitating the stable mounting of the battery device.

[0012] In some embodiments, at least one of the first plate segment, the second plate segment, the third plate segment, and the second mounting plate is provided with a welding edge, and the welding edge is welded to the frame to form the weld seam.

[0013] Since the mounting member is also provided with a welding edge, the mounting member can be welded more firmly to the frame, improving the stability of the mounting member. At the same time, the welding edge forms a lap weld seam after welding, improving the stress condition of the mounting member and reducing the stress concentration at the weld seam position.

[0014] In some embodiments, the first mounting plate and the second mounting plate enclose a cavity, and a second adhesive layer is provided in the cavity, covering at least a part of the connection portion between the mounting member and the frame.

[0015] Thus, further adhesion is performed inside the cavity of the mounting member to the frame, further enhancing the connection strength between the mounting member and the frame and reducing the stress concentration at the weld seam position.

[0016] In some embodiments, the first adhesive layer includes an adhesive layer formed by structural adhesive.

[0017] Thus, the structural adhesive is suitable for bonding metal materials, has good adhesion and strong adhesive force; the first adhesive layer formed after curing has certain toughness, excellent anti-peeling, shear, pulling, and impact properties: and has excellent anti-aging and anti-corrosion properties.

[0018] In some embodiments, the thickness of the first adhesive layer does not exceed 10 mm.

[0019] Thereby, the reinforcement effect of the weld seam and the reinforcement cost can be taken into account, and the interference with other structural members can be reduced.

[0020] In some embodiments, the thickness of the first adhesive layer ranges from 0.5 mm to 10 mm.

[0021] Thereby, the reinforcement effect of the weld seam can be further improved, and the connection strength of the mounting member can be improved.

[0022] In some embodiments, the mounting members are arranged on both sides of the functional member in the first direction, and the functional member includes at least one of a heat exchange pipeline joint, a drain valve, and an electrical connector.

[0023] Thereby, the functional members of the battery device, such as the heat exchange pipeline joint, etc., can be avoided, and the mounting strength on the side where the functional member is located can be further improved.

[0024] The second aspect of the embodiments of the present application provides an electrical device, and the electrical device includes the battery device described in the first aspect of the embodiments of the present application, and the battery device is used to provide electric energy.

[0025] Since the electrical device includes the battery device described in the first aspect of the embodiments of the present application, the stability and reliability of the electrical device can be improved.

[0026] In some embodiments, the electrical device is a vehicle, the second direction is consistent with the advancing and retreating direction of the vehicle, and a plurality of the mounting members are arranged on at least one side of the battery device along the advancing and retreating direction of the vehicle.

[0027] Thereby, the mounting members can be arranged on the front and rear sides to adapt to the overall vehicle envelope and improve the mounting strength of the battery device.

[0028] Through the present application, the mounting strength of the battery device can be improved, the risk of mounting failure can be reduced, and the installation stability of the battery device can be improved.

[0029] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically exemplified below. Description of the Drawings

[0030] Upon reading the following detailed description of the preferred embodiments, various other advantages and benefits will become apparent to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. Also, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0031] Figure 1 Schematic structural diagram of a vehicle provided by some embodiments of the present application;

[0032] Figure 2 Schematic structural diagram of a battery device provided by some embodiments of the present application;

[0033] Figure 3 Top view of a battery device provided by some embodiments of the present application;

[0034] Figure 4 Side view of a battery device provided by some embodiments of the present application;

[0035] Figure 5 Is Figure 3 The cross-sectional view at A-A in

[0036] Figure 6 Is Figure 4 The partial enlarged view at B in

[0037] Figure 7 Schematic diagram of the fillet weld formed by the mounting member and the frame;

[0038] Figure 8 Schematic diagram of the lap weld formed by the mounting member and the frame;

[0039] Figure 9 Stereo exploded view of the mounting member provided by some embodiments of the present application.

[0040] Explanation of reference numerals

[0041] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, box body; 11, frame; 12, bottom plate; 20, mounting member; 21, first mounting plate; 21A, first plate segment; 21B, second plate segment; 21C, third plate segment; 21D, first through hole; 22, second mounting plate; 22A, second through hole; 23, sleeve; 23A, limiting portion; 24, welding edge; 25, opening; 30, first adhesive layer; 40, second adhesive layer; 50, weld; 60, functional member; 70, mounting beam; S, accommodation space; S1, cavity. Detailed implementation manners

[0042] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this specification and the above drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality" means more than two unless otherwise specifically defined.

[0045] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0047] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed, operated or used in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of this application.

[0048] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are both allowed to have a certain degree of tolerance and / or error, including the situations of being approximately parallel and approximately perpendicular.

[0051] Below, this application is described in detail.

[0052] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0053] In many application scenarios, battery devices can be mounted on electrical devices such as vehicles. As demand continues to increase, the industry's requirements for the mounting strength of battery devices are also increasing. Therefore, how to improve the mounting strength of battery devices is one of the research and development topics in the industry.

[0054] After research and design, the battery device can be mounted through a mounting part, and the mounting part and the frame of the battery device are connected by welding. Adding an adhesive layer at the weld position can improve the stress condition of the weld, enhance the connection strength, and reduce the risk of weld failure.

[0055] Based on such a design concept, the present application designs a battery device, which includes a box body, a functional component, a mounting beam and at least one mounting member. The box body has a frame defining an accommodation space for accommodating battery cells; the mounting member is arranged outside the accommodation space and is welded to the frame to form a weld seam, and the surface of the weld seam is covered with a first adhesive layer. The mounting beam is arranged on at least one side of the frame along a first direction, and the mounting member is arranged on at least one side of the frame along a second direction; the functional component is arranged on at least one side of the frame along the second direction and is located outside the accommodation space, and the first direction, the second direction and the gravity direction are perpendicular to each other.

[0056] Since the mounting member is fixed to the frame by welding and the surface of the weld seam is covered with a first adhesive layer, the first adhesive layer can reinforce the weld seam and improve the connection strength between the mounting member and the frame. In addition, the first adhesive layer covers the surface of the weld seam, preventing the weld seam from directly contacting corrosive media in the external environment, which can improve the anti-corrosion performance of the weld seam, reduce the weakening of the welded connection by corrosive media to a certain extent, and reduce the risk of weld seam cracking and failure. At the same time, mounting members can be installed at multiple points on the frame, avoiding the functional components of the battery device, improving the installation flexibility, and the mounting members are used in cooperation with the mounting beam to adapt to different mounting environments.

[0057] In the following embodiments, for the convenience of description, a power-consuming device of an embodiment of the present application is taken as a vehicle 1000 as an example for illustration. The following is described with reference to the accompanying drawings.

[0058] Figure 1 A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. As Figure 1 shown, a battery device 100 is arranged inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the power consumption requirements during the start, navigation and driving of the vehicle 1000.

[0059] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0060] In the embodiments of the present application, the battery cell may be a secondary battery, which refers to a battery cell that can be activated by charging after discharging so that the active material can be reused.

[0061] The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application do not limit this.

[0062] Although not shown, the battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the short circuit between the positive and negative electrodes and at the same time allow the active ions to pass through.

[0063] In some embodiments, the electrode assembly may have a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

[0064] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0065] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal-prismatic battery, etc., and the present application has no special limitation.

[0066] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0067] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with a cable tie.

[0068] In some embodiments, the battery device may be a battery pack, which includes a box body and one or more battery cell assemblies accommodated in the box body.

[0069] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0070] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0071] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the box body to accommodate the battery cell assembly. Here, "closed" means covering or closing, which may be sealed or non-sealed. The first box body may be a top cover or a bottom plate.

[0072] As an example, the box body may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0073] As an example, the box body may be part of the chassis structure of a vehicle. For example, the top cover of the box body may become at least part of the floor of the vehicle, or the frame of the box body may become at least part of the cross beam and longitudinal beam of the vehicle.

[0074] In some embodiments, the battery device refers to an energy storage device, which includes a box body, and a door is provided on at least one side of the box body. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0075] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0076] Next, with reference to Figures 2 to 9 Some embodiments of the present application will be described in detail.

[0077] Figure 2 is a schematic structural diagram of a battery device provided for some embodiments of the present application; Figure 3 is a top view of a battery device provided for some embodiments of the present application; Figure 4 is a side view of a battery device provided for some embodiments of the present application; Figure 5 is Figure 3 a cross-sectional view taken at A-A in Figure 6 is Figure 4 a partial enlarged view at B in Figure 7Schematic diagram of the fillet weld formed by the mounting member and the frame Figure 8 Schematic diagram of the lap weld formed by the mounting member and the frame Figure 9 Exploded perspective view of the mounting member provided by some embodiments of the present application

[0078] In some embodiments of the present application, for the convenience of description, a first direction, a second direction, and a gravity direction are defined. The directions in which the first direction, the second direction, and the gravity direction are located are directions that intersect each other. Here, intersecting each other includes perpendicular intersection with each other. For the convenience of understanding the embodiments of the present application, in the embodiments shown in FIGS. 1 to 9, an example in which the first direction, the second direction, and the gravity direction are perpendicular to each other is used for illustration. However, those skilled in the art should understand that the embodiments of the present application are not limited to the case where the three directions are perpendicular to each other. For the convenience of description, as Figure 1 As shown by the arrows in FIGS. 1 to 9, the direction in which the arrow X is located is defined as the first direction, the direction in which the arrow Y is located is defined as the second direction, and the direction in which the arrow Z is located is defined as the gravity direction. Sometimes, the direction in which the arrow Z points along the gravity direction is also referred to as "downward", and the opposite direction is referred to as "upward".

[0079] The first aspect of the embodiments of the present application provides a battery device 100. In the embodiments of the present application, as Figure 2 , Figure 3 , Figure 4 shown, the battery device 100 includes a box body 10, a functional member 60, a mounting beam 70, and at least one mounting member 20. The box body 10 has a frame 11 that defines an accommodation space S for accommodating battery cells; the mounting member 20 is disposed outside the accommodation space S and is welded to the frame 11 to form a weld 50, and the surface of the weld 50 is covered with a first adhesive layer 30; the mounting beam 70 is disposed on at least one side of the frame 11 along the first direction (X), and the mounting member 20 is disposed on at least one side of the frame 11 along the second direction (Y); the functional member 60 is disposed on at least one side of the frame 11 along the second direction (Y) and is located outside the accommodation space S, and the first direction (X), the second direction (Y), and the gravity direction (Z) are perpendicular to each other.

[0080] Optionally, the box body 10 may include a frame 11 and a bottom plate 12. The frame 11 is disposed around the edge of the bottom plate 12, and the frame 11 defines the accommodation space S.

[0081] It can be understood that the material of the frame 11 has sufficient strength, stiffness, and corrosion resistance, and plays a role in supporting and protecting in the battery device 100 while minimizing the weight to improve energy efficiency. Commonly used materials include aluminum alloy, high-strength steel, or composite materials, etc.

[0082] Optionally, the frame 11 can be made of a metal material with a certain strength. Exemplarily, L-shaped angle steel, I-beam, C-shaped steel, or Z-shaped steel can be used for manufacturing. The present application does not limit the formation method of the frame 11.

[0083] Optionally, the frame 11 can be a straight frame structure extending along a straight line or a curved frame structure.

[0084] Optionally, the frame 11 can be formed by die casting, roll forming, extrusion forming, or cutting using profiles.

[0085] Optionally, the shape of the frame 11 includes but is not limited to a rectangular structure, a circular structure, a triangular structure, a pentagonal structure, a hexagonal structure, a rhombic structure, or an elliptical structure, etc. Correspondingly, the shape of the accommodation space S matches the shape of the frame 11.

[0086] Exemplarily, as Figure 2 shown, when observed along the gravity direction (Z), the shape of the frame 11 can be rectangular.

[0087] In addition, in this text, with respect to the frame 11, the side where the accommodation space S is located is referred to as the inner side, and the side opposite to the accommodation space S across the frame 11 is referred to as the outer side.

[0088] As Figure 2 shown, battery cells (not shown) can be arranged in the accommodation space S, and the present application does not limit the arrangement manner among multiple battery cells.

[0089] It can be understood that the mounting member 20 is used to mount the battery device 100 to an external component, and can support and protect the battery device 100 to prevent damage to the battery device 100 caused by vibration or collision. The position and number of the mounting members 20 are generally matched and set according to the design and configuration of the electric vehicle and the size and shape of the battery device 100.

[0090] Optionally, the mounting member 20 is disposed on the surface of the frame 11 located outside the accommodation space S. The mounting member 20 has a plurality of mounting points, and mounting holes for the connection member to pass through are formed at the positions of the mounting points. A part or all of these mounting points are connected to the external component through the connection member. The connection member can include bolts. The external component can include a mounting structural member provided on the vehicle body chassis.

[0091] Optionally, a plurality of mounting members 20 can be provided, and the plurality of mounting members 20 are spaced apart from each other along the extension direction of the frame 11. Of course, in some embodiments not shown, only one mounting member 20 can also be provided.

[0092] Optionally, the mounting member 20 may be made of the same material as the frame 11, or may be made of a material with a strength greater than that of the frame 11. Exemplarily, the mounting member 20 may be made of aluminum alloy or galvanized steel sheet and manufactured by sheet metal processing.

[0093] Optionally, the mounting member 20 may be welded to the frame 11 by fusion welding or brazing. Exemplarily, the mounting member 20 may be welded to the frame 11 by laser welding or arc welding. Laser welding uses the heat generated by bombarding the workpiece with a focused laser beam as the energy source. Arc welding uses the heat generated by the discharge between the electrode and the base material for welding.

[0094] Optionally, the mounting member 20 may overlap with the frame 11 to form a lap joint for subsequent welding, or may form a corner joint or a hemmed joint, etc., which is convenient for welding.

[0095] Optionally, after welding, the box body 10 may be electrophoresed to improve the flatness of the surface of the weld 50 and enhance the wear resistance and corrosion resistance of the weld 50.

[0096] Optionally, the surface of the weld 50 is covered with a first adhesive layer 30. The first adhesive layer 30 may cover the entire weld 50 or only cover a part of the weld 50.

[0097] It can be understood that, different from the sealant used in spot welding, the first adhesive layer 30 in the embodiment of the present application is formed by coating on the surface of the weld 50 after welding is completed.

[0098] Optionally, for each weld 50, the first adhesive layer 30 may cover the entire weld 50, or may bond the mounting member 20 near the weld 50 to the frame 11 outside the coverage of the weld 50 to enhance the connection strength between the two.

[0099] Optionally, the first adhesive layer 30 may include an adhesive layer formed by sealant and / or structural adhesive. These adhesives can form a protective layer after curing and can enhance the corrosion resistance of the weld 50.

[0100] It can be understood that the functional member 60 may interfere with the setting of the mounting beam 70. The mounting member 20 in the embodiment of the present application has a small size and can be more flexibly installed in the limited space outside the frame 11 provided with the functional member 60.

[0101] It can be understood that the mounting beam 70 is a beam body with multiple mounting points thereon.

[0102] Exemplarily, as Figure 2 shown, two mounting beams 70 are arranged on both sides of the rectangular frame 11 along the first direction (X). The mounting beam 70 extends along the second direction (Y), and multiple mounting points are spaced along the second direction (Y).

[0103] Exemplarily, as Figure 2 shown, the mounting member 20 is disposed on at least one side of the rectangular frame 11 along the second direction (Y), and has a single mounting point. The mounting member 20 cooperates with the mounting beam 70 to mount the battery device 100 on other electrical devices.

[0104] Optionally, the mounting beam 70 can be a hollow beam body, which can reduce its own weight.

[0105] Optionally, the material of the mounting beam 70 is a metal material, such as aluminum alloy, and can be manufactured by roll forming or extrusion forming processes. The material of the mounting beam 70 can also be a non-metal composite material, such as carbon fiber composite material or glass fiber composite material. The embodiments of the present application do not limit this.

[0106] Since the mounting member 20 is fixed to the frame 11 by welding, and the surface of the weld 50 is covered with the first adhesive layer 30, the first adhesive layer 30 can reinforce the weld 50 and improve the connection strength between the mounting member 20 and the frame 11. In addition, the first adhesive layer 30 covers the surface of the weld 50, preventing the weld 50 from directly contacting the corrosive medium in the external environment, which can improve the corrosion resistance of the weld 50, reduce the weakening of the welded connection by the corrosive medium to a certain extent, and reduce the risk of weld 50 cracking and failure. At the same time, the mounting member 20 can be installed at multiple points on the frame 11, avoiding the functional components 60 of the battery device 100, improving the installation flexibility, and adapting to different mounting environments.

[0107] In the embodiments of the present application, the mounting member 20 includes a first mounting plate 21 and a second mounting plate 22 connected to each other. The first mounting plate 21 includes a first plate segment 21A, a second plate segment 21B, and a third plate segment 21C, which are connected in sequence; the first plate segment 21A and the third plate segment 21C are respectively connected to the second mounting plate 22, and the second plate segment 21B and the second mounting plate 22 are stacked along the gravity direction (Z); at least one of the first plate segment 21A, the second plate segment 21B, the third plate segment 21C, and the second mounting plate 22 is welded to the frame 11 to form a weld 50.

[0108] Optionally, the first plate segment 21A, the second plate segment 21B, and the third plate segment 21C are independent plate-like members, and the three are connected in sequence to form the first mounting plate 21. Similarly optionally, the first plate segment 21A, the second plate segment 21B, and the third plate segment 21C are of an integral structure, and the two ends of a plate-like member are respectively bent to form three first plate segments 21A, 21B, and 21C extending in different directions.

[0109] Exemplarily, the first mounting plate 21 can be manufactured by extrusion forming, sheet metal processing, etc.

[0110] It can be understood that the first mounting plate 21 and the second mounting plate 22 are arranged in a layered manner, thereby forming stress transmission at different heights to achieve the dispersion of pressure.

[0111] Optionally, one side of the first plate segment 21A and the third plate segment 21C along the gravity direction (Z) are respectively fixedly connected to the second mounting plate 22, and a cavity S1 is formed inside.

[0112] Exemplarily, one side of the first plate segment 21A and the third plate segment 21C along the gravity direction (Z) are respectively welded to the second mounting plate 22. The above welding can use fusion welding, pressure welding or brazing. The embodiments of the present application do not limit this. Moreover, the first plate end, the second plate segment 21B, the third plate end, and the second mounting plate 22 are all welded to the frame 11.

[0113] Also exemplarily, one side of the first plate segment 21A and the third plate segment 21C along the gravity direction (Z) are respectively fixed to the second mounting plate 22 by methods such as bonding, riveting, and bolt connection.

[0114] Alternatively, in some embodiments not shown in the figures, the first mounting plate 21 and the second mounting plate 22 are of an integrally formed structure.

[0115] The above-mentioned gravity direction (Z) refers to the direction of gravity received by an object with weight. In this article, it refers to the direction perpendicular to the horizontal direction when the battery device 100 is mounted or placed in a substantially horizontal posture. However, it should be understood that during the use of the battery device 100, the posture may change as the posture of the electrical device (such as the vehicle 1000) carrying the battery device 100 changes, but such a posture change does not affect the relative positional relationship between the components in the battery.

[0116] It can be understood that the shapes of the first plate end, the second plate segment 21B, the third plate end and the second mounting plate 22 are not limited to Figure 6 , Figure 9 the shapes in, that is, the mounting member 20 is not limited to a cuboid shape.

[0117] Thus, the structure of the mounting member 20 is simple and convenient for assembly. Each plate end can be welded to the frame 11, improving the stress condition of the mounting member 20 and further enhancing the connection strength between the mounting member 20 and the frame 11. In addition, the second half segment and the second mounting plate 22 can provide a plane for mounting, facilitating the mounting of the battery device 100.

[0118] In the embodiments of the present application, the mounting member 20 includes a sleeve 23. The second plate segment 21B is provided with a first through hole 21D, and the second mounting plate 22 is provided with a second through hole 22A. The sleeve 23 passes through the first through hole 21D and the second through hole 22A.

[0119] Exemplarily, the mounting member 20 further includes a sleeve 23, and the sleeve 23 can facilitate the mounting of the battery device 100 to an external member. For example, it can be fixed to the mounting point of the external member by means of bolt connection or the like.

[0120] It can be understood that the shape, size, quantity, and arrangement of the sleeve 23 can all be adjusted according to the actual situation. The first through hole 21D and the second through hole 22A can also be adjusted according to the actual situation of the sleeve 23. The embodiments of the present application do not make any limitations in this regard.

[0121] Exemplarily, the sleeve 23 can be a cylindrical tube. One sleeve 23 is provided for each mounting member 20, and the limiting portion 23A protrudes relative to the edge of the sleeve 23. Among them, the limiting portion 23A and the sleeve 23 body can be integrally connected or fixedly connected by means of welding or the like. The outer diameter of the limiting portion 23A is greater than the outer diameter of the sleeve 23 body. The limiting portion 23A can limit the sleeve 23 body. One or more limiting portions 23A can be provided. The limiting portion 23A can be provided on both side edges of the sleeve 23 along the gravity direction (Z), and can also be provided at the middle position.

[0122] Exemplarily, as Figure 9 shown, the limiting portion 23A can be a flange structure.

[0123] Optionally, other annular limiting members that are clamped to the outer peripheral wall of the sleeve 23 can also be provided. The embodiments of the present application do not make any limitations in this regard.

[0124] Since the mounting member 20 further includes the sleeve 23, it is convenient for positioning during mounting, improves the mounting accuracy and mounting yield of the battery device 100, and is conducive to stably mounting the battery device 100.

[0125] In the embodiments of the present application, at least one of the first plate segment 21A, the second plate segment 21B, the third plate segment 21C, and the second mounting plate 22 is provided with a welding edge 24, and the welding edge 24 is welded to the frame 11 to form a weld seam 50.

[0126] It can be understood that the welding edge 24 is a kind of flanging, and the welding edge 24 can be arranged facing the frame 11.

[0127] Exemplarily, the first plate segment 21A, the second plate segment 21B, the third plate segment 21C, and the second mounting plate 22 are all provided with welding edges 24. By providing the welding edges 24, the contact area between the mounting member 20 and the frame 11 is increased, better stress transmission is formed, welding connection is facilitated and the connection reliability is improved, so that the mounting member 20 is welded more firmly, and further the mounting stability of the battery device 100 is improved.

[0128] Optionally, the thickness of the welding edge 24 may be the same as or different from that of the first plate segment 21A, the second plate segment 21B, the third plate segment 21C, and the second mounting plate 22.

[0129] Optionally, the welding edge 24 is integrally formed with the first plate segment 21A, the second plate segment 21B, the third plate segment 21C, and the second mounting plate 22.

[0130] It can be understood that the welding edge 24 and the frame 11 form a Figure 8 lap joint as shown.

[0131] In some other embodiments, the welding edge 24 is provided in part of the first plate segment 21A, the second plate segment 21B, the third plate segment 21C, and the second mounting plate 22, and the plate segments without the welding edge 24 and the frame 11 form a Figure 7 corner joint as shown.

[0132] Since the mounting member 20 is also provided with the welding edge 24, the welding between the mounting member 20 and the frame 11 can be made more firm, improving the stability of the mounting member 20. At the same time, the welding edge 24 forms a lap weld 50 after welding, improving the stress condition of the mounting member 20 and reducing the stress concentration at the position of the weld 50.

[0133] In the embodiments of the present application, the first mounting plate 21 and the second mounting plate 22 enclose to form a cavity S1, and a second adhesive layer 40 is provided in the cavity S1, and the second adhesive layer 40 covers at least part of the connection part between the mounting member 20 and the frame 11.

[0134] Exemplarily, as Figure 5 , Figure 6 shown, the second adhesive layer 40 covers at least part of the connection part between the mounting member 20 and the frame 11.

[0135] Specifically, the second adhesive layer 40 may cover the intersection line between the mounting member 20 and the frame 11 in the cavity S1.

[0136] It can be understood that the weld 50 is generally provided outside the cavity S1, and adding the second adhesive layer 40 in the cavity S1 can increase the stress-bearing area and reduce the stress concentration degree of the weld 50.

[0137] Optionally, the second adhesive layer 40 may be formed by curing structural adhesive, and the glue can be poured in through the opening 25 or the through hole of the mounting member 20. For example, after the mounting member 20 and the frame 11 are welded, the opening 25 of the mounting member 20 is set upward, and an appropriate amount of structural adhesive is injected inward and cured to form the second adhesive layer 40. In the embodiments of the present application, the thickness of the formed second adhesive layer 40 is not limited, as long as it can cover at least part of the connection part between the mounting member 20 and the frame 11.

[0138] Thus, further bonding is performed inside the cavity S1 of the mounting member 20 and the frame 11, further improving the connection strength between the mounting member 20 and the frame 11 and reducing the stress concentration at the position of the weld 50.

[0139] In an embodiment of the present application, the first adhesive layer 30 includes an adhesive layer formed by structural adhesive.

[0140] Exemplarily, the structural adhesive can be one of a polyurethane matrix structural adhesive, an epoxy resin matrix, an acrylate matrix, etc.

[0141] Another example is that the structural adhesive can also be two-component, such as a structural adhesive with polyurethane and a curing agent such as isocyanate. Other types are not listed here.

[0142] It can be understood that the first adhesive layer 30 involved in the embodiment of the present application does not contain metal components, that is, it is not a weld repair agent.

[0143] Thus, the structural adhesive is suitable for bonding metal materials, has good adhesion and strong adhesive force; the first adhesive layer 30 formed after curing has certain toughness, excellent anti-peeling, shear, pulling and impact properties, and has excellent aging resistance and anti-corrosion properties.

[0144] In an embodiment of the present application, the thickness H of the first adhesive layer 30 does not exceed 10 mm.

[0145] It can be understood that as Figure 7 、 Figure 8 shown, the thickness H of the first adhesive layer 30 refers to the thickness in the direction perpendicular to the surface of the first adhesive layer 30, and the thickness H at each part of the first adhesive layer 30 can be equal or unequal.

[0146] Exemplarily, the thickness H of the first adhesive layer 30 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, 7.5 mm, 8.0 mm, 8.5 mm, 9.0 mm, 9.5 mm, 10.0 mm, etc., and other values are not listed.

[0147] Thus, the reinforcement effect of the weld 50 and the reinforcement cost can be balanced, and the interference with other structural members can be reduced.

[0148] In an embodiment of the present application, the thickness of the first adhesive layer is in the range of 0.5 mm to 10 mm.

[0149] Thus, the reinforcement effect of the weld 50 can be further improved, and the connection strength of the mounting member 20 can be improved.

[0150] In an embodiment of the present application, mounting members 20 are provided on both sides of the functional member 60 along the first direction, and the functional member 60 includes at least one of a heat exchange pipeline joint, a drain valve, and an electrical connector.

[0151] Exemplarily, as Figure 2 shown, the functional member 60 may include a heat exchange pipeline joint, a drain valve, an electrical connector, etc. Structures such as the heat exchange pipeline joint, the drain valve, and the electrical connector protrude from the frame 11, which may interfere with the setting of the mounting beam 70. The mounting member 20 in the embodiment of the present application has a small size and can be more flexibly installed in the restricted space outside the frame 11.

[0152] Thus, it is possible to allow the mounting members 20 to be installed at multiple points on the frame 11, improve the installation flexibility, adapt to different mounting environments, and can also avoid the functional members 60 of the battery device 100, such as heat exchange pipeline joints, electrical interfaces, etc., further improving the mounting strength on the side where the functional member 60 is located.

[0153] A second aspect of the embodiment of the present application provides an electrical device. In the embodiment of the present application, the electrical device includes the battery device 100 of the first aspect of the embodiment of the present application, and the battery device 100 is used to provide electrical energy.

[0154] Since the electrical device includes the battery device 100 of the first aspect of the embodiment of the present application, the stability and reliability of the electrical device can be improved.

[0155] In the embodiment of the present application, the electrical device is a vehicle 1000, the second direction (Y) is consistent with the advancing and retreating direction of the vehicle, and a plurality of mounting members 20 are provided on at least one side of the battery device 100 along the advancing and retreating direction of the vehicle.

[0156] Exemplarily, as Figure 1 shown, the vehicle 1000 can move forward and backward along the second direction (Y), and the battery device 100 can be mounted on the chassis of the vehicle 1000. Motors, suspensions, etc. of the vehicle 1000 will interfere with the setting of the mounting beam 70 at the front and rear ends of the battery device 100. The battery device 100 in the embodiment of the present application can be provided with mounting members 20 on one side or both sides along the second direction (Y) to adapt to the overall vehicle envelope. On the left and right sides of the vehicle 1000, the battery device 100 can also be provided with mounting beams 70 to improve the mounting strength. Thus, the mounting members 20 can be arranged on the front and rear sides of the vehicle 1000 to adapt to the overall vehicle envelope and improve the mounting strength of the battery device 100.

[0157] The specific solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0158] In a specific embodiment, as Figure 2As shown, the box body 10 includes a roll-formed frame 11, and the mounting member 20 is welded to the outside of the frame 11; after welding, the box body 10 is electrophoresed, and after electrophoresis, a first adhesive layer 30 is provided on the surface of the weld 50 for reinforcement.

[0159] In a specific embodiment, the structural adhesive can be directly and evenly applied on the weld 50 to form the first adhesive layer 30. The first adhesive layer 30 completely covers the weld 50 and can bond the frame 11 and the mounting member 20.

[0160] In some other embodiments, structural adhesive can also be poured into the inner cavity S1 of the mounting member 20 to form a second adhesive layer 40.

[0161] Exemplarily, for the first adhesive layer 30 and the second adhesive layer 40, a structural adhesive can be selected, and a two-component natural-curing structural adhesive can be chosen, such as DEPU 2020 / 2020+ / 2116 polyurethane adhesive.

[0162] If there is no special instruction, all the implementation manners and optional implementation manners of the present application can be combined with each other to form a new technical solution.

[0163] If there is no special instruction, all the technical features and optional technical features of the present application can be combined with each other to form a new technical solution.

[0164] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope claimed by the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope claimed.

Claims

1. A battery device, characterized in that, It includes a box body, a functional component, a mounting beam and at least one mounting component. The box body has a frame defining an accommodation space for accommodating battery cells. The mounting component is disposed outside the accommodation space and is welded to the frame to form a weld seam, and the surface of the weld seam is covered with a first adhesive layer. The mounting beam is disposed on at least one side of the frame along a first direction, and the mounting component is disposed on at least one side of the frame along a second direction. The functional component is disposed on at least one side of the frame along the second direction and outside the accommodation space, and the first direction, the second direction and the gravity direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that, The mounting component includes a first mounting plate and a second mounting plate connected to each other. The first mounting plate includes a first plate segment, a second plate segment and a third plate segment, and the first plate segment, the second plate segment and the third plate segment are connected in sequence. The first plate segment and the third plate segment are respectively connected to the second mounting plate, and the second plate segment and the second mounting plate are stacked along the gravity direction; at least one of the first plate segment, the second plate segment, the third plate segment and the second mounting plate is welded to the frame to form the weld seam.

3. The battery device according to claim 2, characterized in that, The mounting component includes a sleeve. A first through hole is formed in the second plate segment, and a second through hole is formed in the second mounting plate. The sleeve passes through the first through hole and the second through hole.

4. The battery device according to claim 2, wherein At least one of the first plate segment, the second plate segment, the third plate segment and the second mounting plate is provided with a welding edge, and the welding edge is welded to the frame to form the weld seam.

5. The battery device according to claim 2, characterized in that, The first mounting plate and the second mounting plate enclose a cavity, and a second adhesive layer is disposed in the cavity, and the second adhesive layer covers at least a part of the connection portion between the mounting component and the frame.

6. The battery device according to any one of claims 1 to 5, characterized in that, The first adhesive layer includes an adhesive layer formed by structural adhesive.

7. The battery device according to any one of claims 1 to 5, characterized in that, The thickness of the first adhesive layer does not exceed 10 mm.

8. The battery device according to claim 7, characterized in that, The thickness of the first adhesive layer ranges from 0.5 mm to 10 mm.

9. The battery device according to any one of claims 1 to 5, characterized in that, The mounting components are disposed on both sides of the functional component along the first direction. The functional component includes at least one of a heat exchange pipeline joint, a drain valve, and an electrical connector.

10. An electrical device, characterized in that, The electrical device includes the battery device according to any one of claims 1 to 9, and the battery device is used to provide electric energy.

11. The electrical device according to claim 10, characterized in that, The electrical device is a vehicle, the second direction is consistent with the advancing and retreating direction of the vehicle, and a plurality of the mounting components are disposed on at least one side of the battery device along the advancing and retreating direction of the vehicle.

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