Battery apparatus and electrical apparatus

Abstract

The present application belongs to the technical field of batteries. Disclosed are a battery apparatus and an electrical apparatus. The battery apparatus comprises a plurality of battery cells and a box assembly. At least part of the box assembly forms a support part, the support part being used for supporting the plurality of battery cells. A pressure relief mechanism is provided on the sides of the battery cells facing the support part. The support part comprises a first plate body and a second plate body, the first plate body and the second plate body being stacked. The first plate body is provided with a first through hole corresponding to the position of the pressure relief mechanism, and the second plate body is provided with a second through hole corresponding to the position of the pressure relief mechanism. The first plate body comprises a first main body part and a first flange which are integrally formed, the first through hole passing through the first main body part. The first flange is an annular structure extending in the circumferential direction of the first through hole, extends from the wall of the first through hole towards the second plate body and is connected to the second plate body. The battery apparatus has relatively high production efficiency.

Description

Battery devices and electrical appliances Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202411479140.1, entitled “Battery Device and Power Consumption Device”, filed on October 22, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a battery device and an electrical device. Background Technology

[0003] 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.

[0004] Improving the production efficiency of battery devices is a pressing issue in battery technology. Summary of the Invention

[0005] In view of the above problems, this application provides a battery device and an electrical device that can improve the production efficiency of the battery device.

[0006] In a first aspect, this application provides a battery device comprising a plurality of battery cells and a housing assembly. At least a portion of the housing assembly forms a support member for supporting the plurality of battery cells. A pressure relief mechanism is provided on the side of each battery cell facing the support member. The support member comprises a first plate and a second plate, which are stacked. The first plate has a first through hole corresponding to the position of the pressure relief mechanism, and the second plate has a second through hole corresponding to the position of the pressure relief mechanism. The first plate includes an integrally formed first main body and a first flange. The first through hole penetrates the first main body, and the first flange is an annular structure extending circumferentially along the first through hole. The first flange extends from the wall of the first through hole toward the second plate and connects to the second plate.

[0007] In the technical solution of this application embodiment, after the first flange and the first main body are integrally formed, it is only necessary to connect the first flange to the second plate to form a pressure relief channel for the discharge of the battery cell. That is, the first through hole is formed at the same time as the first plate is processed, which has high processing efficiency and short production cycle, and is conducive to improving the production efficiency of the battery device.

[0008] In one or more embodiments of the first aspect, the first main body has a first surface facing away from the second plate, the first flange has a first inner peripheral surface and a first transition surface, the first transition surface is an arc surface, and the first transition surface bends to connect the first inner peripheral surface and the first surface.

[0009] In the above scheme, since the first transition surface is an arc surface, it can guide the discharge of the battery cell, which helps the discharge to pass through the first through hole more smoothly and thus improves the reliability of the battery device.

[0010] In one or more embodiments of the first aspect, the first flange is connected to the wall of the second through hole.

[0011] In the above scheme, the wall of the second through hole can be used as the assembly reference for the first plate, which is beneficial to improving the assembly efficiency of the support components.

[0012] In one or more embodiments of the first aspect, the second plate has a second surface facing the first plate. A first flange is connected to the second surface and disposed around the second through hole.

[0013] In the above scheme, during the assembly process of the first plate and the second plate, the second surface can serve as the pre-bearing surface of the first plate, thereby reducing the assembly difficulty of the supporting components.

[0014] In one or more embodiments of the first aspect, the second plate has a third surface facing away from the first plate. A first flange passes through a second through hole and is connected to the third surface.

[0015] In the above scheme, since the first flange passes through the second through hole and connects to the third surface, the risk of gaps appearing in the discharge channel formed by the first flange is relatively small, and the discharge path of the discharge is more stable. This is conducive to discharging the discharge along a designated path and reduces the risk of the discharge causing other battery cells to run away uncontrollably. At the same time, it is beneficial to have a larger connection area between the first flange and the third surface, thereby improving the connection stability between the first plate and the second plate.

[0016] In one or more embodiments of the first aspect, the first flange is brazed to the second plate body.

[0017] In the above solution, because the first flange and the second plate are brazed together, the heat-affected zone is small and the connection stability is high. Furthermore, a single brazing operation can connect multiple first flanges and second plates simultaneously, resulting in high processing efficiency.

[0018] In one or more embodiments of the first aspect, the second plate includes an integrally formed second main body and a second flange, a second through hole penetrating the second main body, and the second flange is an annular structure extending circumferentially along the second through hole. The second flange extends from the hole wall of the second through hole toward the first plate and is connected to the first flange.

[0019] In the above scheme, after the first flange and the first main body are integrally formed, and the second flange and the second main body are integrally formed, it is only necessary to connect the first flange and the second flange to form a pressure relief channel for the flow of discharge from the battery cell. The processing efficiency is high and the production cycle is short, which is conducive to improving the production efficiency of the battery device.

[0020] In one or more embodiments of the first aspect, the second main body has a third surface facing away from the first plate, and the second flange has a second inner peripheral surface and a second transition surface, the second transition surface being an arc surface, and the second transition surface bending to connect the second inner peripheral surface and the third surface.

[0021] In the above scheme, since the second transition surface is an arc surface, the second transition surface can guide the discharge of the battery cell, which is conducive to the discharge of the discharge through the second through hole more smoothly, thereby improving the reliability of the battery device.

[0022] In one or more embodiments of the first aspect, the first plate is located between the battery cell and the second plate, the second flange surrounds the first flange, the first flange has a first outer peripheral surface, the second flange has a second inner peripheral surface, and the second inner peripheral surface is connected to the first outer peripheral surface.

[0023] In the above scheme, since the first plate is located between the battery cell and the second plate, and the second flange surrounds the first flange, this design reduces the risk of the second flange blocking the discharge and causing poor pressure relief during the process of discharge flowing from the first through hole to the second through hole.

[0024] In one or more embodiments of the first aspect, the first plate is located between the battery cell and the second plate, the first flange surrounds the second flange, the first flange has a first inner peripheral surface, the second flange has a second outer peripheral surface, and the first inner peripheral surface is connected to the second outer peripheral surface.

[0025] In the above scheme, since the first plate is located between the battery cell and the second plate, and the second flange surrounds the first flange, this design allows the second flange to provide a certain support force to the first flange from the side. This is beneficial to maintaining the pressure relief channel in a relatively stable state when the supporting component is under stress, so that the emissions can be released in a predetermined direction.

[0026] In one or more embodiments of the first aspect, the first flange includes a first end face connecting its outer peripheral surface and inner peripheral surface, and the second flange has a second end face connecting its outer peripheral surface and inner peripheral surface, wherein the first end face and the second end face are connected.

[0027] In the above scheme, the first end face and the second end face can be positioned relative to each other, facilitating their fit and reducing assembly difficulty. Simultaneously, the connection between the first and second end faces to form a pressure relief channel can reduce the weight of the supporting components to some extent, which is beneficial for improving the energy density of the battery device.

[0028] In one or more embodiments of the first aspect, a gap is formed between the first plate and the second plate.

[0029] In the above scheme, since there is a gap between the first plate and the second plate, when the total thickness of the supporting component is constant, the existence of the gap can reduce the weight of the supporting component, thereby increasing the energy density of the battery device.

[0030] In one or more embodiments of the first aspect, the battery device further includes a reinforcing member disposed between the first plate and the second plate, the reinforcing member having a third through hole, at least a portion of the first flange being located in the third through hole.

[0031] In the above solution, the reinforcement component increases the strength of the supporting parts, making their support for the battery cells more stable and improving the reliability of the battery assembly. Meanwhile, the third through hole, via the first flange, allows for pre-positioning, reducing assembly difficulty.

[0032] In one or more embodiments of the first aspect, the reinforcing member is made of honeycomb material.

[0033] In the above scheme, the use of honeycomb material to make the reinforcing parts can make the supporting components have both greater strength and lighter weight, thereby enabling the battery device to have both higher stability and higher energy density.

[0034] In one or more embodiments of the first aspect, the housing assembly further includes a frame and a base plate, the frame surrounding the base plate, a support member connected to the frame, and a collection cavity formed between the support member and the base plate, wherein emissions from the battery cell can enter the collection cavity through a first through hole and a second through hole.

[0035] In the above scheme, some of the emissions from the battery cells can be collected in the collection chamber instead of flowing between adjacent battery cells, thus preventing further damage to the electrical connections inside the battery device and improving the reliability of the battery device.

[0036] In one or more embodiments of the first aspect, the housing assembly further includes a frame, a bottom plate, and a bottom protective plate. The frame surrounds the bottom plate, the supporting member is the bottom plate, and the bottom protective plate is disposed on the side of the supporting member away from the battery cell. A collection cavity is formed between the supporting member and the bottom protective plate, and the emissions from the battery cell can enter the collection cavity through a first through hole and a second through hole.

[0037] In the above solution, the bottom protective plate reduces the risk of the supporting components being scraped by foreign objects, which helps to maintain the pressure relief channel in a relatively stable state, allowing the emissions to be smoothly discharged into the collection chamber. At the same time, some of the emissions from the battery cells can be collected in the collection chamber instead of flowing between adjacent battery cells, thus preventing further damage to the internal electrical connections of the battery device and improving the reliability of the battery device.

[0038] Secondly, this application provides an electrical device that includes the battery device in one or more of the above embodiments, the battery device being used to provide electrical energy.

[0039] In the above scheme, since the production efficiency of the battery device in one or more of the above embodiments is high, the production efficiency of the power-consuming device including the battery device in one or more of the above embodiments is also high.

[0040] 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 other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0042] Figure 1 is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0043] Figure 2 is an exploded view of a battery device according to some embodiments of this application;

[0044] Figure 3 is an exploded view of a battery cell according to some embodiments of this application;

[0045] Figure 4 is an exploded view of a portion of the structure of a battery device according to some embodiments of this application;

[0046] Figure 5 is an exploded view of a portion of the structure of a battery device according to some embodiments of this application;

[0047] Figure 6 is a schematic diagram of the structure of the support component in some embodiments of this application;

[0048] Figure 7 is a cross-sectional view at point AA in Figure 6;

[0049] Figure 8 is a magnified view of part B in Figure 7;

[0050] Figure 9 is a partial schematic diagram of the support components according to some embodiments of this application;

[0051] Figure 10 is a partial schematic diagram of the support component according to some embodiments of this application;

[0052] Figure 11 is a partial schematic diagram of the support components of some other embodiments of this application;

[0053] Figure 12 is a partial schematic diagram of a support component according to some embodiments of this application;

[0054] Figure 13 is a structural schematic diagram of a support component according to some embodiments of this application;

[0055] Figure 14 is a cross-sectional view at point CC in Figure 13;

[0056] Figure 15 is a magnified view of part D in Figure 14;

[0057] Figure 16 is an isometric view of a support component according to some embodiments of this application;

[0058] Figure 17 is an exploded view of a support component according to some embodiments of this application;

[0059] Figure 18 is a magnified view of a portion of point E in Figure 17;

[0060] Figure 19 is a magnified view of a portion of point G in Figure 17;

[0061] Figure 20 is a magnified view of part F in Figure 17;

[0062] Figure 21 is a schematic diagram of the structure of the support component in some other embodiments of this application;

[0063] Figure 22 is a cross-sectional view at point HH in Figure 21;

[0064] Figure 23 is a magnified view of part I in Figure 22;

[0065] Figure 24 is a cross-sectional view of a portion of the structure of a battery device according to some embodiments of the application.

[0066] The reference numerals in the detailed embodiments are as follows:

[0067] 1000 - Vehicle; 200 - Controller; 300 - Motor; 100 - Battery Unit; 11 - Housing; 111 - First Housing; 112 - Second Housing; 12 - Battery Cell; 121 - Housing; 1211 - End Cap; 1212 - Shell; 122 - Electrode Assembly; 123 - Electrode Terminal; 124 - Adapter Plate; 125 - Pressure Relief Mechanism; 13 - Battery Cell Assembly; 14 - Support Component; 141 - First Plate; 1411 - First 1412-First main body; 14121-First surface; 14131-First transition surface; 1413-First flange; 142-Second plate; 1421-Second through hole; 1422-Second main body; 1423-Second flange; 14231-Second transition surface; 1424-Second surface; 1425-Third surface; 143-Reinforcing member; 1431-Third through hole; 15-Collection cavity; 16-Frame; 17-Bottom guard plate.

[0068] Detailed Implementation

[0069] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0070] 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.

[0071] 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. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0072] 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.

[0073] 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).

[0074] 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.

[0075] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0076] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.

[0077] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0078] In some implementations, the electrode assembly is a wound structure.

[0079] In some implementations, the electrode assembly is a stacked structure.

[0080] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0081] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0082] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0083] In related technologies, a battery cell generally includes a casing and an electrode assembly. The casing may include a housing and an end cap. The housing has an opening. After the electrode assembly is installed inside the housing, the opening of the housing can be closed by the end cap to form a sealed space inside the housing to accommodate the electrode assembly.

[0084] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0085] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0086] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0087] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0088] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0089] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0090] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0091] The development of battery technology must take into account multiple design factors, such as reliability, cycle life, discharge capacity, charge / discharge rate, energy density and other performance parameters. In addition, the production efficiency of battery devices also needs to be considered.

[0092] Battery cells typically have at least three layers of protection. Specifically, these protection measures include at least switching elements, selection of appropriate separator materials, and pressure relief mechanisms.

[0093] A pressure relief mechanism is a component or part that is activated to release internal pressure or temperature when the internal pressure, temperature, or other conditions of a battery cell reach a predetermined threshold. This threshold design varies depending on design requirements. The threshold may depend on one or more materials of the positive electrode, negative electrode, electrolyte, and separator in the battery cell. The pressure relief mechanism can take the form of an explosion-proof valve, gas valve, pressure relief valve, or safety valve, and can specifically employ pressure-sensitive or temperature-sensitive elements or structures. That is, when the internal pressure, temperature, or other conditions of the battery cell reach the predetermined threshold, the pressure relief mechanism actuates or a weak structure within the mechanism is damaged, thereby creating an opening or channel for the release of internal pressure or temperature.

[0094] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0095] A typical battery pack includes a housing assembly, which in turn includes support components to support multiple battery cells. To guide emissions away from uncontrolled cells when they are depressurized, a pressure relief channel is typically provided on the support component for the emissions to pass through. This pressure relief channel is usually achieved by machining multiple pressure relief holes in the support component. However, this machining process is time-consuming and inefficient, especially when there are a large number of battery cells in the battery pack.

[0096] In view of this, this application provides a battery device, which includes multiple battery cells and a housing assembly. At least a portion of the housing assembly forms a support member for supporting the multiple battery cells. A pressure relief mechanism is provided on the side of each battery cell facing the support member. The support member includes a first plate and a second plate, which are stacked. The first plate has a first through hole corresponding to the position of the pressure relief mechanism, and the second plate has a second through hole corresponding to the position of the pressure relief mechanism. The first plate includes an integrally formed first main body and a first flange. The first through hole penetrates the first main body, and the first flange is an annular structure extending circumferentially along the first through hole. The first flange extends from the wall of the first through hole toward the second plate and connects to the second plate. After the first flange and the first main body are integrally formed, only the first flange needs to be connected to the second plate to form a pressure relief channel for the flow of discharge from the battery cells. That is, the first through hole is formed simultaneously with the processing of the first plate, resulting in high processing efficiency and a short production cycle, which is beneficial to improving the production efficiency of the battery device.

[0097] The technical solutions described in the embodiments of this application are applicable to battery cells, battery devices, and electrical equipment using battery devices.

[0098] Electrical equipment includes, but is not limited to: electric vehicles, electric cars, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0099] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0100] For example, Figure 1 is a structural schematic diagram of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be a fuel-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. The vehicle 1000 may have a motor 300, a controller 200, and a battery device 100 installed inside. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0101] To meet different power demands, the battery device 100 may include multiple battery cells 12, which can be connected in series, parallel, or a combination thereof. The battery device 100 may also be referred to as a battery pack. Optionally, the multiple battery cells 12 may first be connected in series, parallel, or a combination thereof to form a battery cell assembly 13, and then the multiple battery cell assemblies 13 may be connected in series, parallel, or a combination thereof to form the battery device 100. That is, the multiple battery cells 12 can directly form the battery device 100, or they can first be formed into battery cell assemblies 13, and then the battery cell assemblies 13 can be formed into the battery device 100.

[0102] For example, please refer to Figure 2, which is an exploded view of a battery device 100 according to some embodiments of this application. The battery device 100 may include a plurality of battery cells 12. The battery device 100 may also include a housing 11, which has a hollow internal structure, and the plurality of battery cells 12 are housed within the housing 11. As shown in Figure 2, these are referred to here as a first housing 111 and a second housing 112, which are fastened together. The shapes of the first housing 111 and the second housing 112 can be determined according to the shape of the combination of the plurality of battery cells 12. Both the first housing 111 and the second housing 112 may have an open surface. For example, both the first housing 111 and the second housing 112 may be hollow cuboids with only one open surface each. The open surfaces of the first housing 111 and the second housing 112 are arranged opposite to each other, and the first housing 111 and the second housing 112 are fastened together to form a housing 11 with a closed cavity. Multiple battery cells 12 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the first housing 111 and the second housing 112 being fastened together.

[0103] Optionally, the battery device 100 may also include other structures, which will not be described in detail here. For example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 12, such as in parallel, series, or mixed connection. Specifically, the busbar component can realize electrical connection between battery cells 12 by connecting the electrode terminals 123 of the battery cells 12. Further, the busbar component can be fixed to the electrode terminals 123 of the battery cells 12 by welding. The electrical energy of the multiple battery cells 12 can be further led out through the housing 11 via a conductive mechanism.

[0104] The number of battery cells 12 can be set to any value depending on different power requirements. Multiple battery cells 12 can be connected in series, parallel, or mixed connection to achieve a larger capacity or power. Since each battery device 100 may include a large number of battery cells 12, for ease of installation, the battery cells 12 can be grouped, with each group of battery cells 12 forming a battery cell assembly 13. The number of battery cells 12 included in a battery cell assembly 13 is unlimited and can be set according to requirements. The battery device 100 may include multiple battery cell assemblies 13, which can be connected in series, parallel, or mixed connection.

[0105] Please refer to Figure 3, which is an exploded view of a battery cell 12 according to some embodiments of this application. The battery cell 12 includes one or more electrode assemblies 122 and a housing 121. The housing 121 may include a shell 1212, and multiple walls of the shell 1212 form a cavity that can be used to accommodate the electrode assemblies 122. The shape of the shell 1212 depends on the combined shape of the one or more electrode assemblies 122. For example, the shell 1212 may be a hollow cuboid, cube, or regular polyhedron, and one face of the shell 1212 has an opening so that one or more electrode assemblies 122 can be placed inside the shell 1212. The shell 1212 is filled with an electrolyte, such as an electrolyte solution.

[0106] The battery cell 12 may also include two electrode terminals 123, which can be disposed on an end cap 1211. The end cap 1211 is typically flat, and the two electrode terminals 123 are fixed to the flat surface of the end cap 1211, which are respectively the positive terminal and the negative terminal. Each electrode terminal 123 is provided with a corresponding adapter piece 124, which is located between the end cap 1211 and the electrode assembly 122, for electrically connecting the electrode assembly 122 and the electrode terminal 123. In this battery cell 12, depending on actual usage requirements, the electrode assembly 122 can be configured as a single unit or multiple units, and multiple independent electrode assemblies 122 are disposed within the battery cell 12.

[0107] According to some embodiments of this application, referring to Figures 4-15, this application provides a battery device 100, which includes a plurality of battery cells 12 and a housing assembly. At least a portion of the housing assembly forms a support member 14 for supporting the plurality of battery cells 12. A pressure relief mechanism 125 is provided on the side of the battery cell 12 facing the support member 14. The support member 14 includes a first plate 141 and a second plate 142, which are stacked. The first plate 141 has a first through hole 1411 corresponding to the position of the pressure relief mechanism 125, and the second plate 142 has a second through hole 1421 corresponding to the position of the pressure relief mechanism 125. The first plate 141 includes an integrally formed first main body 1412 and a first flange 1413. A first through hole 1411 penetrates the first main body 1412. The first flange 1413 is an annular structure extending circumferentially along the first through hole 1411. The first flange 1413 extends from the hole wall of the first through hole 1411 toward the second plate 142 and is connected to the second plate 142.

[0108] The housing assembly typically has a closed chamber in which the battery cell 12 is housed.

[0109] In some embodiments, the housing assembly includes a frame 16, a base plate, and a cover plate. The frame 16 surrounds the base plate to form a cavity with an opening, and the cover plate closes the opening to form a closed cavity. The base plate and the frame can be integrally formed, for example, by stamping. The base plate and the frame 16 can also be separately formed, for example, by welding.

[0110] In some embodiments, the support member 14 may be a base plate. In other embodiments, the support member 14 may be located between the battery cell 12 and the base plate.

[0111] In some instances, the housing assembly may also include two expansion beams disposed on the support member 14. The expansion beams, support member 14, and frame 16 together define a chamber for housing a plurality of battery cells 12. The plurality of battery cells 12 are located between the two expansion beams, which are used to resist the expansion forces of the battery cells 12.

[0112] In some embodiments, the support member 14 is located above the battery cell 12 in the direction of gravity.

[0113] In some embodiments, the support member 14 is located below the battery cell 12 in the direction of gravity.

[0114] In some embodiments, the support member 14 is located on one side of the battery cell 12 in the direction intersecting with the direction of gravity.

[0115] In some embodiments, battery cells 12 are provided on both sides of the support member 14.

[0116] In some embodiments, the support member 14 is provided with a flow channel, and a heat exchange medium is provided in the flow channel. The heat exchange medium is used to regulate the temperature of the battery cell 12.

[0117] In some embodiments, the first plate 141 and the second plate 142 are in contact in their stacking direction.

[0118] In some embodiments, the first plate 141 is located between the battery cell 12 and the second plate 142, and some of the emissions flow from the first through hole 1411 to the space between the first plate 141 and the second plate 142, and some of the emissions flow from the first through hole 1411 to the second through hole 1421 and out of the support member 14; or, all the emissions flow from the first through hole 1411 to the second through hole 1421 and out of the support member 14.

[0119] In some embodiments, some or all of the emissions can flow from the first through-hole 1411 to the second through-hole 1421 and out of the support member 14 before being directly discharged to the outside of the battery device 100.

[0120] In some embodiments, the first body portion 1412 and the first flange 1413 are formed simultaneously by stamping. In other embodiments, a plurality of first flanges 1413 are formed simultaneously in a single stamping process.

[0121] In some embodiments, the first flange 1413 may be divided into multiple segments, which are arranged around the circumference of the first through hole 1411 to form an annular structure.

[0122] In some embodiments, the first through hole 1411 is formed simultaneously with the formation of the first flange 1413. For example, in an embodiment where the first flange 1413 is formed by stamping, a notch can be pre-machined on the first plate 141, and the stamping die acts around the notch, forming the first through hole 1411 around the periphery of the die after stamping. It should be noted that when multiple first through holes 1411 need to be provided, multiple first through holes 1411 and multiple first flanges 1413 can be formed simultaneously with only one stamping operation.

[0123] In some embodiments, the first flange 1413 and the second plate 142 are connected by welding.

[0124] In some embodiments, the first flange 1413 is thermally fused to the second plate 142.

[0125] In some embodiments, the material of the first plate 141 includes, but is not limited to, metal, composite material, and plastic. In embodiments where the first plate 141 is made of metal, the material may include, but is not limited to, aluminum, steel, stainless steel, and alloys. In embodiments where the first plate 141 is made of plastic, the material may include, but is not limited to, polyamide, polyethylene, and polypropylene. In embodiments where the first plate 141 is made of composite material, the material may include, but is not limited to, fiber-reinforced composite materials, metal matrix composite materials, ceramic matrix composite materials, and resin matrix composite materials.

[0126] In some embodiments, the material of the second plate 142 includes, but is not limited to, metals, composite materials, and plastics. In embodiments where the second plate 142 is made of metal, the material may include, but is not limited to, aluminum, steel, stainless steel, and alloys. In embodiments where the second plate 142 is made of plastic, the material may include, but is not limited to, polyamide, polyethylene, and polypropylene. In embodiments where the second plate 142 is made of composite materials, the material may include, but is not limited to, fiber-reinforced composite materials, metal matrix composite materials, ceramic matrix composite materials, and resin matrix composite materials.

[0127] In the technical solution of this application embodiment, after the first flange 1413 and the first main body 1412 are integrally formed, it is only necessary to connect the first flange 1413 to the second plate 142 to form a pressure relief channel for the discharge of the battery cell 12. That is, the first through hole 1411 is formed at the same time as the first plate 141 is processed. The processing efficiency is high and the production cycle is short, which is conducive to improving the production efficiency of the battery device.

[0128] According to some embodiments of this application, referring to Figures 4-15, the first main body 1412 has a first surface 14121 facing away from the second plate 142, and the first flange 1413 has a first inner peripheral surface and a first transition surface 14131. The first transition surface 14131 is an arc surface, and the first transition surface 14131 bends to connect the first inner peripheral surface and the first surface 14121.

[0129] In some embodiments, where the first body portion 1412 and the first flange 1413 are formed by stamping, the first transition surface 14131 is naturally formed. This is an arc surface that is naturally formed after the mold acts on the first plate 141, causing plastic deformation of a portion of the first plate 141.

[0130] Since the first main body 1412 and the first flange 1413 are formed together, the arc-shaped first transition surface 14131 not only enables the battery device 100 to have high production efficiency, but also guides the emission, which is beneficial for the battery device 100 to achieve both high production efficiency and high reliability.

[0131] In the above scheme, since the first transition surface 14131 is an arc surface, it can guide the discharge of the battery cell 12, which is conducive to the discharge of the discharge through the first through hole 1411 more smoothly, thereby improving the reliability of the battery device 100.

[0132] According to some embodiments of this application, referring to Figures 4 and 10, the first flange 1413 is connected to the wall of the second through hole 1421.

[0133] In some embodiments, the second through hole 1421 may be formed during the processing of the second plate 142, for example by casting.

[0134] In some embodiments, the second through hole 1421 may be formed by machining or other means.

[0135] Of course, in some embodiments, the second through hole 1421 can also be formed by stamping.

[0136] In the above scheme, the wall of the second through hole 1421 can be used as the assembly reference of the first plate 141, which is beneficial to improving the assembly efficiency of the support component 14.

[0137] According to some embodiments of this application, referring to Figures 4 and 11, the second plate 142 has a second surface 1424 facing the first plate 141. A first flange 1413 is connected to the second surface 1424 and is disposed around the second through hole 1421.

[0138] In some embodiments, the outer peripheral surface of the first flange 1413 smoothly transitions to the wall of the second through hole 1421, which facilitates the smoother flow of the discharge through the inner periphery of the first flange 1413 and through the second through hole 1421.

[0139] In the above scheme, during the assembly process of the first plate 141 and the second plate 142, the second surface 1424 can serve as the pre-bearing surface of the first plate 141, thereby reducing the assembly difficulty of the support component 14.

[0140] According to some embodiments of this application, referring to Figures 4 and 12, the second plate 142 has a third surface 1425 facing away from the first plate 141. A first flange 1413 passes through a second through hole 1421 and is connected to the third surface 1425.

[0141] In some embodiments, the first flange 1413 can be riveted to fit against the third surface 1425. In other embodiments, a reinforcing member 143 can be provided between the first plate 141 and the second plate 142, and the reinforcing member 143 is constrained between the first plate 141 and the second plate 142 to achieve assembly during the connection of the first flange 1413 and the third surface 1425.

[0142] In the above scheme, since the first flange 1413 passes through the second through hole 1421 and connects to the third surface 1425, the risk of gaps appearing in the discharge channel formed by the first flange 1413 is relatively small, and the discharge path of the discharge is more stable. This is conducive to discharging the discharge along a designated path and reduces the risk of the discharge causing other battery cells 12 to run away uncontrollably. At the same time, it is beneficial to have a larger connection area between the first flange 1413 and the third surface 1425, thereby improving the connection stability of the first plate 141 and the second plate 142.

[0143] According to some embodiments of this application, the first flange 1413 is brazed to the second plate 142.

[0144] In some embodiments, a plurality of first flanges 1413 may be simultaneously connected to the second plate 142 in a brazing furnace.

[0145] In the above solution, because the first flange 1413 and the second plate 142 are brazed together, the heat-affected zone is small and the connection stability is high. At the same time, multiple first flanges 1413 and second plates 142 can be connected simultaneously in a single brazing operation, resulting in high processing efficiency.

[0146] According to some embodiments of this application, please refer to Figures 5-15. The second plate 142 includes an integrally formed second main body 1422 and a second flange 1423. The second through hole 1421 penetrates the second main body 1422. The second flange 1423 is an annular structure extending circumferentially along the second through hole 1421. The second flange 1423 extends from the hole wall of the second through hole 1421 toward the first plate 141 and is connected to the first flange 1413.

[0147] In some embodiments, the second body portion 1422 and the second flange 1423 are formed simultaneously by stamping. In other embodiments, a plurality of second flanges 1423 are formed simultaneously in a single stamping process.

[0148] In some embodiments, the second flange 1423 may be divided into multiple segments, which are arranged around the second through hole 1421 to form an annular structure.

[0149] In some embodiments, the second through hole 1421 is formed simultaneously with the formation of the second flange 1423. For example, in an embodiment where the second flange 1423 is formed by stamping, a notch may be pre-machined on the second plate 142, and the stamping die acts around the notch, forming the second through hole 1421 around the periphery of the die after the stamping process is completed.

[0150] In some embodiments, the second flange 1423 is connected to the first flange 1413 by welding.

[0151] In some embodiments, the second flange 1423 is thermally fused to the first flange 1413.

[0152] In the above scheme, after the first flange 1413 and the first main body 1412 are integrally formed, and the second flange 1423 and the second main body 1422 are integrally formed, it is only necessary to connect the first flange 1413 and the second flange 1423 to form a pressure relief channel for the discharge of the battery cell 12. The processing efficiency is high and the production cycle is short, which is conducive to improving the production efficiency of the battery device 100.

[0153] According to some embodiments of this application, please refer to Figures 5-15. The second main body 1422 has a third surface 1425 that is opposite to the first plate 141. The second flange 1423 has a second inner peripheral surface and a second transition surface 14231. The second transition surface 14231 is an arc surface. The second transition surface 14231 bends to connect the second inner peripheral surface and the third surface 1425.

[0154] In some embodiments where the second body portion 1422 and the second flange 1423 are formed by stamping, the second transition surface 14231 is naturally formed, which is an arc surface that is naturally formed after the mold acts on the second plate 142 to cause plastic deformation of a portion of the second plate 142.

[0155] Since the second main body 1422 and the second flange 1423 are processed together, the arc-shaped second transition surface 14231 not only enables the battery device 100 to have high production efficiency, but also guides the emission, which is beneficial for the battery device 100 to achieve both high production efficiency and high reliability.

[0156] In the above scheme, since the second transition surface 14231 is an arc surface, the second transition surface 14231 can guide the discharge of the battery cell 12, which is conducive to the discharge of the discharge through the second through hole 1421 more smoothly, thereby improving the reliability of the battery device 100.

[0157] According to some embodiments of this application, please refer to Figures 5-8. The first plate 141 is located between the battery cell 12 and the second plate 142. The second flange 1423 surrounds the first flange 1413. The first flange 1413 has a first outer peripheral surface, and the second flange 1423 has a second inner peripheral surface. The second inner peripheral surface is connected to the first outer peripheral surface.

[0158] Referring to Figure 8, in some embodiments, the first flange 1413 contacts the second plate 142, which helps to improve the connection stability between the first plate 141 and the second plate 142.

[0159] In the above scheme, since the first plate 141 is located between the battery cell 12 and the second plate 142, and the second flange 1423 surrounds the first flange 1413, this design reduces the risk of poor pressure relief caused by the second flange 1423 blocking the discharge during the process of discharge flowing from the first through hole 1411 to the second through hole 1421.

[0160] According to some embodiments of this application, please refer to Figures 5 and 9. The first plate 141 is located between the battery cell 12 and the second plate 142. The first flange 1413 surrounds the second flange 1423. The first flange 1413 has a first inner peripheral surface, and the second flange 1423 has a second outer peripheral surface. The first inner peripheral surface is connected to the second outer peripheral surface.

[0161] Referring to Figure 9, in some embodiments, the second flange 1423 contacts the first plate 141, which helps to improve the connection stability between the first plate 141 and the second plate 142.

[0162] In the above scheme, since the first plate 141 is located between the battery cell 12 and the second plate 142, and the second flange 1423 surrounds the first flange 1413, the second flange 1423 can provide a certain support force to the first flange 1413 from the side. This is beneficial to maintain the pressure relief channel in a relatively stable state when the supporting component 14 is under force, so that the discharge can be released in a predetermined direction.

[0163] According to some embodiments of this application, referring to Figures 13 and 15, the first flange 1413 includes a first end face connecting its outer peripheral surface and inner peripheral surface, and the second flange 1423 has a second end face connecting its outer peripheral surface and inner peripheral surface, with the first end face and the second end face connected.

[0164] In some embodiments, the outer peripheral surface of the first flange 1413 and the outer peripheral surface of the second flange 1423 are smoothly transitioned, which helps to improve the smoothness of emission.

[0165] In the above scheme, the first end face and the second end face can be positioned relative to each other, facilitating their fit and reducing assembly difficulty. Simultaneously, the connection between the first and second end faces to form a pressure relief channel can reduce the weight of the supporting component 14 to some extent, which is beneficial for improving the energy density of the battery device 100.

[0166] According to some embodiments of this application, as shown in Figures 13-23, a gap is formed between the first plate 141 and the second plate 142.

[0167] In some embodiments, the first body portion 1412, the second plate 142, and the first flange together define the aforementioned gap.

[0168] In some embodiments, the first body portion 1412, the second body portion 1422, the first flange 1413, and the second flange 1423 together define the aforementioned gap.

[0169] In the above scheme, since there is a gap between the first plate 141 and the second plate 142, when the total thickness of the support member 14 is constant, the existence of the gap can reduce the weight of the support member 14, thereby increasing the energy density of the battery device 100.

[0170] According to some embodiments of this application, please refer to Figures 16-20. The battery device 100 further includes a reinforcing member 143, which is disposed between the first plate 141 and the second plate 142. The reinforcing member 143 is provided with a third through hole 1431, and at least a portion of the first flange 1413 is located in the third through hole 1431.

[0171] The reinforcing member 143 can be made of materials including, but not limited to, metal, plastic, and composite materials. In embodiments where the reinforcing member 143 is made of metal, the material can include, but is not limited to, aluminum, steel, stainless steel, and alloys. In embodiments where the reinforcing member 143 is made of plastic, the material can include, but is not limited to, polyamide, polyethylene, and polypropylene. In embodiments where the reinforcing member 143 is made of composite materials, the material can include, but is not limited to, fiber-reinforced composite materials, metal matrix composite materials, ceramic matrix composite materials, and resin matrix composite materials.

[0172] The third through hole 1431 can be integrally formed with the reinforcing part 143, or it can be formed by secondary processing after the reinforcing part 143 is processed.

[0173] In the above scheme, the reinforcement 143 can improve the strength of the support component 14, making its support for the battery cell 12 more stable, which is conducive to improving the reliability of the battery device 100. At the same time, the third through hole 1431 can be pre-positioned through the first flange 1413, reducing the assembly difficulty.

[0174] According to some embodiments of this application, please refer to Figures 16-20. The reinforcing member 143 is made of honeycomb material.

[0175] Honeycomb material can refer to any arrangement of identical columnar cells stacked together to fill a plane. It can also be understood as a porous structure. For example, a plate with multiple through-holes running along its thickness can also be called a honeycomb material.

[0176] Cellular materials can include, but are not limited to, metal cellular materials (made of metals such as aluminum, steel, and copper), plastic cellular materials (made of plastics such as polystyrene, polyurethane, and polypropylene), paper cellular materials (made of pulp or cellulose), and gypsum cellular materials.

[0177] In the above scheme, the reinforcing member 143 is made of honeycomb material, which enables the supporting member 14 to have both greater strength and lighter weight, thereby enabling the battery device 100 to have both higher stability and higher energy density.

[0178] According to some embodiments of this application, please refer to FIG24, the housing assembly further includes a frame 16 and a bottom plate. The frame 16 surrounds the bottom plate. The support member 14 is connected to the frame 16. A collection cavity 15 is formed between the support member 14 and the bottom plate. The emissions from the battery cell 12 can enter the collection cavity 15 through the first through hole 1411 and the second through hole 1421.

[0179] In some embodiments, the frame 16 may be formed by welding together multiple wall portions.

[0180] In some embodiments, the frame 16 includes a plurality of walls, which are integrally formed.

[0181] In some embodiments, a second pressure relief mechanism is provided on the wall of the frame 16, which is used to discharge the discharge in the collection chamber 15 to the outside of the housing 11. Of course, the second pressure relief mechanism can also be provided on the bottom plate.

[0182] In some embodiments, both the first plate 141 and the second plate 142 are connected to the housing 11 by friction stir welding. This arrangement results in a small heat-affected zone in the weld, minimal deformation of the supporting component 14, and high strength. Furthermore, it allows for efficient welding of long welds, leading to high processing efficiency.

[0183] In the above scheme, some of the emissions from the battery cell 12 can be collected in the collection chamber 15 instead of flowing between adjacent battery cells 12, thereby preventing further damage to the electrical connections inside the battery device 100 and improving the reliability of the battery.

[0184] According to some embodiments of this application, please refer to Figures 16-20. The housing assembly also includes a frame 16, a bottom plate, and a bottom protective plate 17. The frame 16 surrounds the bottom plate. The support member 14 is the bottom plate. The bottom protective plate 17 is disposed on the side of the support member 14 away from the battery cell 12. A collection cavity 15 is formed between the support member 14 and the bottom protective plate 17. The emissions from the battery cell 12 can enter the collection cavity through the first through hole 1411 and the second through hole 1421.

[0185] In some instances, the bottom guard plate 17 may be connected to the frame 16 by welding, fasteners, or adhesive.

[0186] In some embodiments, a second pressure relief mechanism is provided on the wall of the frame 16, which is used to discharge the discharge in the collection chamber 15 to the outside of the housing 11. Of course, the second pressure relief mechanism can also be provided on the bottom guard plate 17.

[0187] In the above solution, the bottom protective plate 17 can reduce the risk of the support component 14 being scraped by foreign objects, which helps to maintain the pressure relief channel in a relatively stable state so that the emissions can be smoothly discharged into the collection chamber 15. At the same time, some of the emissions from the battery cell 12 can be collected in the collection chamber 15 and will not flow between adjacent battery cells 12, thereby preventing further damage to the internal electrical connections of the battery device 100 and improving the reliability of the battery device 100.

[0188] According to some embodiments of this application, please refer to FIG1, this application provides an electrical device that includes a battery device 100 as described in one or more of the above embodiments, the battery device 100 being used to provide electrical energy.

[0189] In the above scheme, since the production efficiency of the battery device 100 in one or more of the above embodiments is high, the production efficiency of the power-consuming device including the battery device 100 in one or more of the above embodiments is also high.

[0190] According to some embodiments of this application, please refer to Figures 6-8 and 17-23. This application provides a battery device 100, which includes a housing 11, a bottom protective plate 17, a reinforcing member 143, and a plurality of battery cells 12. The housing 11 includes a frame 16 and a support member 14, which supports the plurality of battery cells 12. The bottom protective plate 17 is disposed on the side of the support member 14 away from the battery cells 12, and a collection cavity 15 is formed between the support member 14 and the bottom protective plate 17. The frame 16 surrounds the support member 14, and the collection cavity 15 is formed between the support member 14 and the bottom protective plate 17. Excrement from the battery cells 12 can enter the collection cavity 15 through a first through hole 1411 and a second through hole 1421.

[0191] A pressure relief mechanism 125 is provided on the side of the battery cell 12 facing the support member 14. The support member 14 includes a first plate 141 and a second plate 142, which are stacked together. The first plate 141 is located between the battery cell 12 and the second plate 142, and a gap is formed between the first plate 141 and the second plate 142.

[0192] The first plate 141 is provided with a first through hole 1411 corresponding to the position of the pressure relief mechanism 125, and the second plate 142 is provided with a second through hole 1421 corresponding to the position of the pressure relief mechanism 125.

[0193] The first plate 141 includes an integrally formed first main body 1412 and a first flange 1413. A first through hole 1411 penetrates the first main body 1412. The first flange 1413 is an annular structure extending circumferentially along the first through hole 1411. The first flange 1413 extends from the wall of the first through hole 1411 toward the second plate 142. The second plate 142 includes an integrally formed second main body 1422 and a second flange 1423. A second through hole 1421 penetrates the second main body 1422. The second flange 1423 is an annular structure extending circumferentially along the second through hole 1421. The second flange 1423 extends from the wall of the second through hole 1421 toward the first plate 141 and is connected to the first flange 1413.

[0194] The first main body 1412 has a first surface 14121 that is opposite to the second plate 142. The first flange 1413 has a first inner peripheral surface and a first transition surface 14131. The first transition surface 14131 is an arc surface and is curved to connect the first inner peripheral surface and the first surface 14121. The second main body 1422 has a third surface 1425 that is opposite to the first plate 141. The second flange 1423 has a second inner peripheral surface and a second transition surface 14231. The second transition surface 14231 is an arc surface and is curved to connect the second inner peripheral surface and the third surface 1425.

[0195] The reinforcing member 143 is disposed between the first plate 141 and the second plate 142. The reinforcing member 143 is made of honeycomb material. The reinforcing member 143 is provided with a third through hole 1431. At least a portion of the first flange 1413 is located in the third through hole 1431, and at least a portion of the second flange 1423 is located in the third through hole 1431.

[0196] The second flange 1423 surrounds the first flange 1413. The first flange 1413 has a first outer peripheral surface, and the second flange 1423 has a second inner peripheral surface. The second inner peripheral surface is connected to the first outer peripheral surface.

[0197] Please refer to Figure 23. As shown by the arrow in Figure 23, when the battery cell 12 experiences thermal runaway, the emissions can flow through the pressure relief channel defined by the first flange 1413 and the second flange 1423 and be discharged into the collection chamber 15 for collection.

[0198] According to some embodiments of this application, referring to Figures 13-21 and 24, this application provides a battery device 100, which includes a housing 11, a bottom protective plate 17, a reinforcing member 143, and a plurality of battery cells 12. The housing 11 includes a frame 16 and a support member 14, which supports the plurality of battery cells 12. The bottom protective plate 17 is disposed on the side of the support member 14 opposite to the battery cells 12, and a collection cavity 15 is formed between the support member 14 and the bottom protective plate 17. The frame 16 surrounds the support member 14, and the collection cavity 15 is formed between the support member 14 and the bottom protective plate 17, allowing the discharge from the battery cells 12 to enter the collection cavity 15 through a first through hole 1411 and a second through hole 1421.

[0199] A pressure relief mechanism 125 is provided on the side of the battery cell 12 facing the support member 14. The support member 14 includes a first plate 141 and a second plate 142, which are stacked. The first plate 141 is located between the battery cell 12 and the second plate 142, and a gap is formed between the first plate 141 and the second plate 142. The first plate 141 has a first through hole 1411 corresponding to the position of the pressure relief mechanism 125, and the second plate 142 has a second through hole 1421 corresponding to the position of the pressure relief mechanism 125. The first plate 141 includes an integrally formed first main body 1412 and a first flange 1413. The first through hole 1411 penetrates the first main body 1412, and the first flange 1413 is an annular structure extending circumferentially along the first through hole 1411, extending from the wall of the first through hole 1411 toward the second plate 142. The second plate 142 includes an integrally formed second main body 1422 and a second flange 1423. A second through hole 1421 penetrates the second main body 1422. The second flange 1423 is an annular structure extending circumferentially along the second through hole 1421. The second flange 1423 extends from the hole wall of the second through hole 1421 toward the first plate 141 and connects with the first flange 1413. The first main body 1412 has a first surface 14121 facing away from the second plate 142. The first flange 1413 has a first inner circumferential surface and a first transition surface 14131. The first transition surface 14131 is an arc surface, and the first transition surface 14131 bends to connect the first inner circumferential surface and the first surface 14121. The second main body 1422 has a third surface 1425 facing away from the first plate 141. The second flange 1423 has a second inner circumferential surface and a second transition surface 14231. The second transition surface 14231 is an arc surface and is curved to connect the second inner circumferential surface and the third surface 1425. A reinforcing member 143 is disposed between the first plate 141 and the second plate 142. The reinforcing member 143 is made of honeycomb material and has a third through hole 1431. At least a portion of the first flange 1413 and at least a portion of the second flange 1423 are located in the third through hole 1431.

[0200] The first flange 1413 includes a first end face connecting its outer peripheral surface and inner peripheral surface, and the second flange 1423 has a second end face connecting its outer peripheral surface and inner peripheral surface, with the first end face and the second end face connected.

[0201] Please refer to Figure 24. As shown by the arrow in Figure 24, when the battery cell 12 experiences thermal runaway, the emissions can flow through the pressure relief channel defined by the first flange 1413 and the second flange 1423 and be discharged into the collection chamber 15 for collection.

[0202] 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, include: Multiple battery cells; A housing assembly, at least a portion of which forms a support member for supporting the plurality of battery cells, wherein a pressure relief mechanism is provided on the side of the battery cell facing the support member; The supporting component includes a first plate and a second plate, which are stacked together. The first plate has a first through hole corresponding to the position of the pressure relief mechanism, and the second plate has a second through hole corresponding to the position of the pressure relief mechanism. The first plate includes an integrally formed first main body and a first flange. The first through hole penetrates the first main body. The first flange is an annular structure extending circumferentially along the first through hole. The first flange extends from the hole wall of the first through hole toward the second plate and is connected to the second plate.

2. The battery device according to claim 1, characterized in that, The first main body has a first surface facing away from the second plate, and the first flange has a first inner peripheral surface and a first transition surface. The first transition surface is an arc surface, and the first transition surface bends to connect the first inner peripheral surface and the first surface.

3. The battery device according to claim 1 or 2, characterized in that, The first flange is connected to the wall of the second through hole.

4. The battery device according to claim 1 or 2, characterized in that, The second plate has a second surface facing the first plate; The first flange is connected to the second surface and is disposed around the second through hole.

5. The battery device according to claim 1 or 2, characterized in that, The second plate has a third surface that is opposite to the first plate; The first flange passes through the second through hole and is connected to the third surface.

6. The battery device according to any one of claims 1-5, characterized in that, The first flange is brazed to the second plate.

7. The battery device according to claim 1, 2, or 6, characterized in that, The second plate includes an integrally formed second main body and a second flange. The second through hole penetrates the second main body. The second flange is an annular structure extending circumferentially along the second through hole. The second flange extends from the hole wall of the second through hole toward the first plate and is connected to the first flange.

8. The battery device according to claim 7, characterized in that, The second main body has a third surface that is away from the first plate, and the second flange has a second inner circumferential surface and a second transition surface. The second transition surface is an arc surface and the second transition surface bends to connect the second inner circumferential surface and the third surface.

9. The battery device according to claim 7 or 8, characterized in that, The first plate is located between the battery cell and the second plate. The second flange surrounds the first flange. The first flange has a first outer peripheral surface, and the second flange has a second inner peripheral surface. The second inner peripheral surface is connected to the first outer peripheral surface.

10. The battery device according to claim 7 or 8, characterized in that, The first plate is located between the battery cell and the second plate. The first flange surrounds the second flange. The first flange has a first inner peripheral surface, and the second flange has a second outer peripheral surface. The first inner peripheral surface is connected to the second outer peripheral surface.

11. The battery device according to claim 7 or 8, characterized in that, The first flange has a first end face at the end away from the first main body, and the second flange has a second end face at the end away from the second main body, and the first end face and the second end face are connected.

12. The battery device according to any one of claims 1-11, characterized in that, A gap is formed between the first plate and the second plate.

13. The battery device according to any one of claims 1-12, characterized in that, The battery device further includes a reinforcing member disposed between the first plate and the second plate, the reinforcing member having a third through hole, at least a portion of the first flange being located in the third through hole.

14. The battery device according to claim 13, characterized in that, The reinforcing component is made of honeycomb material.

15. The battery device according to any one of claims 1-14, characterized in that, The housing assembly also includes a frame and a base plate. The frame surrounds the base plate, and the support member is connected to the frame. A collection cavity is formed between the support member and the base plate, and the emissions from the battery cell can enter the collection cavity through the first through hole and the second through hole.

16. The battery device according to any one of claims 1-14, characterized in that, The housing assembly also includes a frame, a bottom plate, and a bottom protective plate. The frame surrounds the bottom plate, the supporting member is the bottom plate, and the bottom protective plate is disposed on the side of the supporting member away from the battery cell. A collection cavity is formed between the supporting member and the bottom protective plate, and the emissions from the battery cell can enter the collection cavity through the first through hole and the second through hole.

17. An electrical device, characterized in that, Includes a battery device as described in any one of claims 1-16, the battery device being used to provide electrical energy.

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