Battery device and electric device

Abstract

The application provides a battery device and a power utilization device. The battery device comprises a box body and a battery cell. The box body comprises a first box body part, a second box body part, a connecting assembly and a sealing piece. The first box body part and the second box body part are mutually covered along a first direction to form a containing space. The first box body part comprises a first beam and a limiting piece. The limiting piece is connected with the first beam and is protrudingly arranged along the first direction towards the second box body part relative to the first beam. The connecting assembly connects the second box body part with the first beam and is located on a side of the limiting piece away from the containing space. The sealing piece is clamped between the second box body part and the first beam. The battery cell is contained in the containing space. The sealing piece comprises a first part which is located between the limiting piece and the connecting assembly. The battery device provided by the application is beneficial to improving the reliability of the battery device.

Description

Technical Field

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

[0002] Battery devices are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] In the development of battery device technology, in addition to improving the performance of battery devices, reliability is also a crucial consideration. Therefore, improving the reliability of battery devices is a continuous technical challenge in battery technology. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, the battery device provided in the embodiments of this application includes a housing and a battery cell. The housing includes a first housing portion, a second housing portion, a connecting assembly, and a sealing member. The first housing portion and the second housing portion cover each other along a first direction to form an accommodating space. The first housing portion includes a first beam and a limiting member. The limiting member is connected to the first beam and protrudes towards the second housing portion relative to the first beam along the first direction. The connecting assembly connects the second housing portion and the first beam and is located on the side of the limiting member away from the accommodating space. The sealing member is sandwiched between the second housing portion and the first beam. The battery cell is accommodated within the accommodating space. The sealing member includes a first portion, which is located between the limiting member and the connecting assembly.

[0007] The device provided in this application embodiment provides a sealing element sandwiched between the second housing portion and the first beam, with the first portion located between the limiting element and the connecting assembly. The limiting element and the connecting assembly provide a certain limiting effect on the sealing element, thereby reducing the risk of seal failure between the first housing portion and the second housing portion due to displacement of the sealing element, and thus improving the reliability of the battery device.

[0008] According to some embodiments of this application, there are multiple first portions, which are spaced apart along the extension direction of the seal; the seal also includes a second portion, which connects two adjacent first portions, and at least a portion of the side of the second portion facing away from the receiving space is located between two adjacent connecting components.

[0009] In the above solution, by setting a second part to connect two adjacent first parts, the integrity of the seal is improved. At the same time, by placing at least a portion of the second part on the side away from the receiving space between two adjacent connecting components, the two adjacent connecting components can provide a more uniform clamping force to the second part through the first housing part and the second housing part, thereby reducing the risk of seal failure between the first housing part and the second housing part and improving the reliability of the battery device.

[0010] According to some embodiments of this application, the housing further includes a first adhesive layer, which bonds the sealing element to the first beam.

[0011] In the above scheme, the bonding effect of the first adhesive layer on the seal and the first beam helps to reduce the risk of the seal moving relative to the first beam or the second housing, thereby improving the sealing reliability of the seal to the accommodating space.

[0012] According to some embodiments of this application, the connecting assembly includes a first connector, a second connector, and a press-fit member. The first connector is disposed on a first beam and has an internal threaded portion. The second connector has an external threaded portion. The external threaded portion passes through the press-fit member and the second housing portion and is threadedly connected to the internal threaded portion, with at least a portion of the press-fit member sandwiched between the second connector and the second housing portion.

[0013] In the above scheme, the stress of the second connecting member is borne by the pressing member, thereby reducing the risk of stress concentration on the second box section compared to the case where the second connecting member directly presses the second box section, thus reducing the risk of local cracking of the second box section, and helping to improve the fastening force of the first connecting member and the second connecting member on the second box section and the first beam.

[0014] According to some embodiments of this application, the press-fit member includes a first part and a second part, an external threaded part passing through the first part, the first part being sandwiched between the second connector and the second housing part, and the second part being bent relative to the first part in a first direction toward the first beam and covering the end face of the outer peripheral side of the second housing part.

[0015] In the above scheme, by bending the second part relative to the first part in the direction of the first beam in the first direction, and making the second part cover the end face of the outer periphery of the second housing part, the risk of external water, oxygen and other substances causing corrosion to the end face of the outer periphery of the first flange part and the second housing part is reduced, which is beneficial to improving the structural strength of the housing and the sealing reliability of the seals.

[0016] According to some embodiments of this application, along a first direction, there is a first gap between the second housing portion and the first beam, the first gap is located on the side of the connecting assembly away from the first portion, and the second portion blocks at least part of the first gap.

[0017] In the above solution, there is no need to set any sealing structure on the side of the connecting component away from the first part. This simplifies the structure of the housing and reduces the amount of material used in the sealing element, further reducing the weight and production cost of the battery device. At the same time, by blocking at least part of the first gap with the second part, the second part can provide a certain degree of protection for at least part of the sealing element, reducing the risk of external particles or debris cutting the sealing element, which helps to further improve the structural strength of the housing and the sealing reliability of the sealing element.

[0018] According to some embodiments of this application, along a first direction, the orthographic projection of the second part is located inside the orthographic projection of the first beam.

[0019] The above solution helps to reduce the extra space occupied by the press-fitting components and reduces the risk of the press-fitting components interfering with or scratching other structural components outside the housing.

[0020] According to some embodiments of this application, along the first direction, the minimum distance e between the second part and the first beam satisfies: 0.5mm≤e≤2mm.

[0021] In the above scheme, setting e≤2mm helps reduce the risk of corrosion of the first flange and second housing by external impurities such as water, oxygen, or debris, and also reduces the risk of external impurities cutting the seals. This improves the connection reliability between the second housing and the first beam, as well as the sealing reliability of the seals. Furthermore, setting e≤0.5mm helps reduce the risk of noise generated by individual battery cells when subjected to external impacts, vibrations, or other loads.

[0022] According to some embodiments of this application, along a first direction, at least a portion of the first connector protrudes toward the second housing relative to the first beam along the first direction; along the first direction, the distance by which the first connector protrudes relative to the first beam is h1, and the distance by which the limiting member protrudes relative to the first beam is h2, 0≤|h1-h2|≤1mm.

[0023] In the above scheme, by setting 0≤|h1-h2|≤1mm, it is beneficial to improve the limiting and protective effects of the limiting member and the first connecting member on the sealing member along the side facing and away from the receiving space. At the same time, it improves the flatness between the surface of the limiting member abutting the second housing part and the surface of the first connecting member abutting the second housing part, thereby improving the structural stability and sealing reliability of the sealing member when the second housing part presses the sealing member.

[0024] According to some embodiments of this application, the connecting assembly further includes a gasket, with an external thread portion passing through the gasket, and the gasket being sandwiched between the second housing portion and the second connecting member.

[0025] In the above solution, the friction of the second connector can be borne by the gasket, and a certain preload can be provided for the connection between the second connector and the first connector, thereby reducing the friction of the second connector on the surface of the second housing part and thus reducing the wear of the second housing part.

[0026] According to some embodiments of this application, the second housing portion includes a first housing body, a bent portion and a third flange portion. The bent portion connects the first housing body and the third flange portion and is bent relative to the first housing body in a direction toward the first housing portion. A connecting assembly connects the third flange portion and the first beam, and a sealing element is sandwiched between the third flange portion and the first beam.

[0027] The above design improves the overall structural strength and bending resistance of the second housing section, and enhances the structural stability of the housing. Furthermore, the external protrusion of the first housing body relative to the third flange section increases the volume of the accommodating space and facilitates the connection between the third flange section and the first beam.

[0028] According to some embodiments of this application, the orthographic projection of the outer peripheral edge of the second housing portion along the first direction is located inside the first beam.

[0029] The above solution helps to reduce the space occupied by the second housing on the periphery of the housing and reduces the risk of interference between the second housing and other components.

[0030] According to some embodiments of this application, the limiting member is integrally formed with the first beam.

[0031] The above scheme is beneficial to improving the connection strength between the limiting component and the first beam, and also to simplifying the processing technology of the limiting component and the first beam.

[0032] Secondly, the electrical device provided in the embodiments of this application includes the battery device provided in any of the above embodiments, and the battery device is used to provide electrical energy.

[0033] The electrical device provided in this application embodiment has the same technical effect as the battery device provided in this application embodiment, and will not be described again here.

[0034] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the structure of the battery device provided in the embodiments of this application;

[0038] Figure 3 This is a schematic diagram of the structure of a battery cell assembly in a battery device provided in an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the exploded structure of a single battery cell provided in an embodiment of this application;

[0040] Figure 5 A front view of the battery device provided in an embodiment of this application;

[0041] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along AA;

[0042] Figure 7 This is a structural schematic diagram of the second housing and the seal provided in an embodiment of this application;

[0043] Figure 8 for Figure 6 A magnified view of a section at point B.

[0044] The accompanying drawings are not necessarily drawn to scale.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1-Vehicle; 1a-Motor; 1b-Controller;

[0047] 10-Battery assembly; 11-Box; 11a-Accommodation space; 11b-First gap; 111-First box section; 1111-First beam; 111a-First wall; 1112-Limiting member; 112-Second box section; 1121-First box body; 1122-Bending section; 1123-Third flange section; 113-Connecting assembly; 41-First connector; 411-Internal thread section; 4111-Stop section; 412-First flange section; 42-Second connector; 421-External thread section; 422-Second flange section; 114-Sealing element; 1141-First part; 1142-Second part; 115-First adhesive layer; 116-Pressure fitting; 1161-First part; 1162-Second part; 117-Gasket;

[0048] 20-Battery cell module;

[0049] 30-Battery cell; 31-Casing; 311-Housing shell; 312-End cap; 32-Electrode assembly; 321-Electrode body; 322-Taper; 33-Electrode terminal;

[0050] X - First direction. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0053] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In this application, "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).

[0057] The battery device 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, which are connected in series, parallel, or mixed connections via a busbar.

[0058] 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 into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0059] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0060] 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.

[0061] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0062] 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.

[0063] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0064] 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.

[0065] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0066] A single battery cell typically includes an electrode assembly. The electrode assembly comprises 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, prevents short circuits while allowing active ions to pass through.

[0067] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0068] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0069] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be made of stainless steel, copper, aluminum, carbon electrodes, carbon, nickel, or titanium with a silver-plated surface. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0070] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for battery cells may also be used.

[0071] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0072] As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc.

[0073] In some embodiments, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0074] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials in battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0075] In some embodiments, the diaphragm is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0076] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0077] In some embodiments, the membrane is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0078] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0079] 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.

[0080] In some embodiments, the housing includes an end cap and a shell, the shell having an opening, and the end cap closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The shell may have one or more openings. The end cap may also be provided one or more times.

[0081] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0082] In some implementations, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cells.

[0083] As an example, the 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 batteries, such as hexagonal prismatic batteries. There are no particular limitations in the embodiments of this application.

[0084] In a battery assembly, the first and second housing sections of the casing overlap each other, forming a housing space. Individual battery cells are typically housed within this space. To reduce the risk of corrosion from external impurities such as water and oxygen entering the casing, a seal is usually installed between the first and second housing sections to seal the housing space. In related technologies, connectors linking the first and second housing sections are typically inserted through the seals. This means that seals are installed on both the side of the connector (e.g., bolts) closest to and furthest from the housing space, and the seals usually surround the housing space. This results in a large number of seals being used, increasing the weight and production cost of the battery assembly.

[0085] In view of this, the battery device provided in this application includes a housing and a battery cell. The housing includes a first housing portion, a second housing portion, a connecting assembly, and a sealing element. The first housing portion and the second housing portion are mutually covered along a first direction to form an accommodating space. The first housing portion includes a first beam and a limiting member. The limiting member is connected to the first beam and protrudes towards the second housing portion relative to the first beam along the first direction. The connecting assembly connects the second housing portion and the first beam and is located on the side of the limiting member away from the accommodating space. The sealing element is sandwiched between the second housing portion and the first beam. The battery cell is accommodated within the accommodating space. The sealing element includes a first portion, which is located between the limiting member and the connecting assembly.

[0086] The battery device provided in this application embodiment has a sealing element sandwiched between the second housing part and the first beam, and the first part is located between the limiting element and the connecting component. The limiting element and the connecting component provide a certain limiting effect on the sealing element, thereby reducing the risk of sealing failure between the first housing part and the second housing part due to displacement of the sealing element, thereby improving the reliability of the battery device.

[0087] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0088] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using the battery device disclosed in this application.

[0089] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric bicycles, electric motorcycles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0090] For ease of explanation, the following embodiments will be described using a vehicle 1 as an example of an electrical device according to an embodiment of this application.

[0091] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1 provided in an embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 10 is installed inside vehicle 1, and the battery device 10 can be located at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1; for example, the battery device 10 can serve as the operating power source for vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation of vehicle 1.

[0092] The vehicle 1 may also include a controller 1b and a motor 1a. The controller 1b is used to control the battery device 10 to supply power to the motor 1a, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0093] In some embodiments of this application, the battery device 10 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0094] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of the battery device 10 provided in the embodiments of this application. Figure 3 This is a schematic diagram of the structure of the battery cell assembly 20 in the battery device 10 provided in an embodiment of this application. The battery device 10 includes a housing 11 and battery cells 30, with the battery cells 30 housed within the housing 11. The housing 11 provides a housing space 11a for the battery cells 30, and the housing 11 can adopt various structures. In some embodiments, the housing 11 may include a first housing portion 111 and a second housing portion 112, which overlap each other, and together define the housing space 11a for accommodating the battery cells 30. The first housing portion 111 can be a hollow structure with one end open, and the second housing portion 112 can be a plate-like structure. The second housing portion 112 covers the opening side of the second housing portion 112 so that the first housing portion 111 and the second housing portion 112 together define the accommodating space 11a. Alternatively, the first housing portion 111 and the second housing portion 112 can both be hollow structures with one side open, and the opening side of the first housing portion 111 covers the opening side of the second housing portion 112.

[0095] In the battery device 10, there can be multiple battery cells 30, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 30 are connected in both series and parallel configurations. Multiple battery cells 30 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 30 is housed within the housing 11. Alternatively, the battery device 10 can also consist of multiple battery cells 30 first connected in series, parallel, or in a mixed manner to form a battery cell assembly 20, and then the multiple battery cell assemblies 20 are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 11. The battery device 10 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 30.

[0096] Among them, the battery cell 30 can be a secondary battery or a primary battery; the battery cell 30 can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited to these.

[0097] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the exploded structure of a battery cell 30 provided in an embodiment of this application. Figure 4 As shown, the battery cell 30 includes a housing 31, an electrode assembly 32, and electrode terminals 33. The housing 31 includes a casing 311 and an end cap 312. The casing 311 has an opening, and the end cap 312 closes the opening to isolate the internal environment of the battery cell 30 from the external environment.

[0098] The housing 311 is a component used to cooperate with the end cap 312 to form the internal environment of the battery cell 30, wherein the formed internal environment can accommodate the electrode assembly 32, electrolyte, and other components. The housing 311 and the end cap 312 can be independent components. The housing 311 can have various shapes and sizes. Specifically, the shape of the housing 311 can be determined according to the specific shape and size of the electrode assembly 32. The housing 311 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0099] End cap 312 refers to a component that covers the opening of housing 311 to isolate the internal environment of battery cell 30 from the external environment. The shape of end cap 312 can be adapted to the shape of housing 311 to fit it. Optionally, end cap 312 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 312 is not easily deformed under pressure and impact, giving battery cell 30 higher structural strength and improved reliability. Functional components such as electrode terminals 33 can be provided on end cap 312. Electrode terminals 33 can be used for electrical connection with electrode assembly 32 to output or input electrical energy to battery cell 30. The material of end cap 312 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating structure may be provided on the inner side of the end cap 312. The insulating structure can be used to isolate the electrical connection components within the housing 311 from the end cap 312 to reduce the risk of short circuits. For example, the insulating structure may be made of plastic, rubber, etc.

[0100] Electrode assembly 32 is the component in the battery cell 30 where electrochemical reactions occur. The housing 311 may contain one or more electrode assemblies 32. The electrode assembly 32 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates to separate them and prevent internal short circuits. The portions of the positive and negative electrode plates containing active material constitute the electrode body 321 of the electrode assembly 32, while the portions of the positive and negative electrode plates without active material each constitute a tab 322. The positive and negative tabs 322 can be located together at one end of the electrode body 321 or separately at both ends of the electrode body 321. During the charging and discharging process of the battery cell 30, the positive and negative active materials react with the electrolyte, and the tabs 322 connect to the electrode terminals 33 to form a current loop.

[0101] Firstly, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the battery device 10 provided in this application includes a housing 11 and a battery cell 30. A first housing portion 111 and a second housing portion 112 are mutually covered along a first direction X to form a receiving space 11a. The first housing portion 111 includes a first beam 1111 and a limiting member 1112. The limiting member 1112 is connected to the first beam 1111 and protrudes towards the second housing portion 112 along the first direction X relative to the first beam 1111. A connecting assembly 113 connects the second housing portion 112 and the first beam 1111 and is located on the side of the limiting member 1112 away from the receiving space 11a. A sealing member 114 is sandwiched between the second housing portion 112 and the first beam 1111. The battery cell 30 is received in the receiving space 11a. The sealing member 114 includes a first portion 1141, which is located between the limiting member 1112 and the connecting assembly 113.

[0102] The first housing portion 111 and the second housing portion 112 of the battery cell 30 cover each other to form a receiving space 11a for accommodating the battery cell 30. The second housing portion 112 can be a hollow structure with an opening on one side. Optionally, the second housing portion 112 can be flat and cover the opening side of the first housing portion 111; or, the second housing portion 112 can also be a hollow structure with an opening on one side and cover the first housing portion 111.

[0103] The limiting member 1112 is connected to the first beam 1111. Optionally, the limiting member 1112 and the first beam 1111 can be formed separately and then connected together by welding, threaded connection or riveting. Alternatively, the limiting member 1112 and the first beam 1111 can be integrally formed.

[0104] The limiting member 1112 can be connected to the side of the first beam 1111 near the second housing part 112 along the first direction X, and the limiting member 1112 can be connected to the side of the first beam 1111 near the receiving space 11a, so as to reserve enough space on the side of the limiting member 1112 away from the receiving space 11a, so as to facilitate the installation of the connecting assembly 113 and the sealing member 114.

[0105] Optionally, the housing 11 may include a plurality of limiting members 1112, which are spaced apart around the accommodating space 11a; or, the housing 11 may include only one limiting member 1112, which is annular and surrounds the accommodating space 11a.

[0106] The connecting assembly 113 connects the first housing portion 111 and the second housing portion 112. Optionally, the connecting assembly 113 may include rivets, pins, or threaded fasteners such as rivet fasteners. The housing 11 may include multiple connecting assemblies 113, which are spaced apart around the accommodating space 11a. The connecting assembly 113 connects the second housing portion 112 and the first beam 1111. The connecting assembly 113 can provide a certain fastening force along the first direction X to the second housing portion 112 and the first beam 1111, so that the sealing member 114 is clamped between the second housing portion 112 and the first beam 1111 by the fastening force of the connecting assembly 113 on the second housing portion 112 and the first beam 1111.

[0107] The material of the sealing element 114 may include a structure that can produce elastic deformation, such as foamed silicone. The sealing element 114 may be arranged around the periphery of the receiving space 11a to provide a certain sealing effect for the receiving space 11a, reducing the risk of external water, oxygen, etc. entering the receiving space 11a and causing certain corrosion to the battery cells 30 and other components inside the receiving space 11a.

[0108] In some embodiments, the seal 114 is integrally sandwiched between the second housing portion 112 and the first beam 1111. Thus, during the connection of the connecting assembly 113 between the second housing portion 112 and the first beam 1111, the fastening force of the connecting assembly 113 on the second housing portion 112 and the first beam 1111 exerts a certain compressive force on the seal 114, causing the seal 114 to undergo compressive deformation and become sandwiched between the second housing portion 112 and the first beam 1111. Therefore, after the battery device 10 is assembled, the seal 114 is in a compressed state, and both sides of the seal 114 along the first direction X are respectively in contact with the second housing portion 112 and the first beam 1111.

[0109] The first portion 1141 is the part of the seal 114 located between the limiting member 1112 and the connecting assembly 113. Exemplarily, the seal 114 may consist only of the first portion 1141, which is annular and entirely located between the limiting member 1112 and the connecting assembly 113.

[0110] The first part 1141 is located between the limiting member 1112 and the connecting assembly 113. The limiting member 1112 and the connecting assembly 113 can respectively provide the sealing member 114 with limiting functions in two directions: towards the receiving space 11a and away from the receiving space 11a, which is perpendicular to the first direction X. This reduces the risk of the sealing member 114 moving in the direction perpendicular to the first direction X and helps to improve the reliability of the sealing function of the sealing member 114 to the receiving space 11a.

[0111] Along the direction perpendicular to the first direction X, on the side of the connecting component 113 facing away from the first part 1141, no sealing structure may be provided, so as to save the amount of material used in the sealing element 114, which not only reduces the weight of the battery device 10, but also helps to reduce the production cost of the battery device 10.

[0112] Understandably, during the assembly of the battery device 10, before the second housing portion 112 is placed over the first housing portion 111, the sealing member 114 can be placed on the first beam 1111. To improve the sealing reliability of the sealing member 114 over the accommodating space 11a, the dimension of the sealing member 114 along the first direction X before compression can be set to be larger than the dimension of the limiting member 1112 along the first direction X, so that during the connection between the second housing portion 112 and the first beam 1111, before the second housing portion 112 abuts against the limiting member 1112, the sealing member 114 can undergo a certain amount of compressive deformation.

[0113] Of course, it can also be set such that after the battery device 10 is assembled, and the seal 114 undergoes compression deformation, the dimension of the seal 114 along the first direction X is greater than or equal to the dimension of the limit member 1112 along the first direction X.

[0114] After the first housing portion 111 and the second housing portion 112 are closed, the outer periphery of the second housing portion 112 can be provided to extend the first beam 1111 in a direction perpendicular to the first direction X. Alternatively, the outer periphery of the second housing portion 112 can be provided not to extend the first beam 1111, so as to reduce the extra space occupied by the second housing portion 112 and reduce the risk of interference between the second housing portion 112 and other external structures.

[0115] The battery device 10 provided in this application embodiment has a sealing member 114 sandwiched between the second housing portion 112 and the first beam 1111, and the first part 1141 is located between the limiting member 1112 and the connecting assembly 113. The limiting member 1112 and the connecting assembly 113 provide a certain limiting effect on the sealing member 114, thereby reducing the risk of sealing failure between the first housing portion 111 and the second housing portion 112 due to displacement of the sealing member 114, thereby improving the reliability of the battery device 10.

[0116] In some embodiments, such as Figure 7 As shown, there are multiple first portions 1141, and the multiple first portions 1141 are spaced apart along the extension direction of the seal 114; the seal 114 also includes a second portion 1142, the second portion 1142 connects two adjacent first portions 1141, and at least a portion of the side of the second portion 1142 facing away from the receiving space 11a is located between two adjacent connecting components 113.

[0117] The second part 1142 is the portion of the seal 114 used to connect two adjacent first parts 1141.

[0118] In some embodiments, the second part 1142 is provided with a protrusion on the side away from the receiving space 11a, the protrusion being located between two adjacent connecting components 113, and the second part 1142 is provided with a recess corresponding to the protrusion on the side facing the receiving space 11a, so as to save the amount of material used in the seal 114, thereby reducing the weight of the battery device 10 and also helping to reduce the production cost of the battery device 10.

[0119] By providing a second portion 1142 to connect two adjacent first portions 1141, the integrity of the seal 114 is improved. At the same time, by placing at least a portion of the second portion 1142 on the side facing away from the receiving space 11a between two adjacent connecting components 113, the two adjacent connecting components 113 can provide a more uniform clamping force to the second portion 1142 through the first housing portion 111 and the second housing portion 112, thereby reducing the risk of seal failure between the first housing portion 111 and the second housing portion 112 and improving the reliability of the battery device 10.

[0120] In some embodiments, such as Figure 6 and Figure 8 As shown, the housing 11 also includes a first adhesive layer 115, which bonds the sealing member 114 to the first beam 1111.

[0121] Specifically, during the assembly of the battery device 10, before the second housing portion 112 is placed over the first housing portion 111, the sealing element 114 can be bonded to the first beam 1111 via the first adhesive layer 115. Thus, during the process of fastening the second housing portion 112 and the first beam 1111 through the connecting assembly 113, the adhesive effect of the first adhesive layer 115 on the first beam 1111 and the sealing element 114 reduces the risk of the sealing element 114 shifting relative to the first beam 1111.

[0122] After the battery device 10 is assembled, it will inevitably be subjected to impact forces from various directions during use. The bonding effect of the first adhesive layer 115 on the first beam 1111 and the seal 114 can provide a certain degree of restriction on the movement of the seal 114 relative to the second housing portion 112 and the first beam 1111 along the direction perpendicular to the first direction X.

[0123] Therefore, by setting the first adhesive layer 115, during the assembly of the housing 11 or after the housing 11 is assembled, the adhesive effect of the first adhesive layer 115 on the seal 114 and the first beam 1111 helps to reduce the risk of the seal 114 moving relative to the first beam 1111 or the second housing part 112, thereby improving the sealing reliability of the seal 114 on the accommodating space 11a.

[0124] In some embodiments, the connecting assembly 113 includes a first connector 41, a second connector 42, and a press-fit member 116. The first connector 41 is disposed on the first beam 1111 and has an internal thread 411. The second connector 42 has an external thread 421. The external thread 421 passes through the press-fit member 116 and the second housing portion 112 and is threadedly connected to the internal thread 411, with at least a portion of the press-fit member 116 sandwiched between the second connector 42 and the second housing portion 112.

[0125] For example, the first connector 41 can be a rivet nut, and the second connector 42 can be a rivet bolt.

[0126] like Figure 6 and Figure 8 As shown, the connecting assembly 113 includes a first connecting member 41 and a second connecting member 42. The first connecting member 41 includes an internal thread portion 411 and a first flange portion 412. The first flange portion 412 is connected to the end of the internal thread portion 411. The internal thread portion 411 passes through the first beam 1111. The first flange portion 412 is sandwiched between the first beam 1111 and the second housing portion 112. The sealing member 114 is located between the limiting member 1112 and the first flange portion 412. The second connector 42 includes an external threaded portion 421 and a second flange portion 422. The second flange portion 422 is connected to the end of the external threaded portion 421 and is located on the side of the second housing portion 112 away from the first beam 1111. The external threaded portion 421 passes through the second housing portion 112 and the first flange portion 412 and is threadedly connected to the internal threaded portion 411. The external threaded portion 421 has a stop portion 4111. The first wall 111a of the first beam 1111 is sandwiched between the stop portion 4111 and the first flange portion 412.

[0127] The connecting assembly 113 includes a second connector 42 and a first connector 41, and the second housing portion 112 and the first beam 1111 are fastened together by riveting. Specifically, the first flange portion 412 of the first connector 41 is located between the second housing portion 112 and the first beam 1111, and the internal thread portion 411 passes through the first beam 1111. The second flange portion 422 of the second connector 42 is located on the side of the second housing portion 112 opposite to the first beam 1111, and the external thread portion 421 passes through the second housing portion 112 and is threadedly engaged with the internal thread portion 411.

[0128] During the riveting process, as the external threaded portion 421 rotates relative to the internal threaded portion 411, the external threaded portion 421 can no longer move relative to the second housing portion 112 or the first beam 1111 along the first direction X due to the stopping effect of the second flange portion 422 on the external threaded portion 421. At this time, by deforming the internal threaded portion 411 along the first direction X, the internal threaded portion 411 and the external threaded portion 421 can be displaced relative to each other along the first direction X, that is, a stopping portion 4111 is formed on the side of the first wall 111a of the first beam 1111 away from the first flange portion 412.

[0129] Furthermore, since the first flange portion 412 is located between the second housing portion 112 and the first beam 1111, the first flange portion 412 can provide a certain limiting effect for the seal 114 to reduce the risk of the seal 114 moving in a direction perpendicular to the first direction X.

[0130] During the assembly of the housing 11, before the seal 114 is compressed, its dimension along the first direction X can be set to be larger than that of the first flange portion 412 along the first direction X. After the housing 11 is assembled and the seal 114 undergoes compression deformation, its dimension along the first direction X after compression can be set to be larger than or equal to that of the first flange portion 412 along the first direction X. This allows the seal 114 to undergo a certain amount of compression before the second housing portion 112 abuts against the first flange portion 412, thus ensuring a good sealing effect.

[0131] Therefore, by setting the connecting assembly 113 to include a first connecting member 41 and a second connecting member 42 to rivet the second housing portion 112 and the first beam 1111, it is beneficial to improve the connection reliability of the second housing portion 112 and the first beam 1111, and the connection is more efficient and convenient. Furthermore, by utilizing the first flange portion 412 of the first connecting member 41 and the limiting member 1112 together to provide a limiting effect for the seal 114 in two opposite directions perpendicular to the first direction X, it is beneficial to improve the limiting reliability of the seal 114, thereby improving the sealing reliability of the seal 114 to the accommodating space 11a.

[0132] In some embodiments, such as Figure 8 As shown, the pressing member 116 includes a first part 1161 and a second part 1162. The external threaded part 421 passes through the first part 1161. The first part 1161 is sandwiched between the second connector 42 and the second housing part 112. The second part 1162 is bent relative to the first part 1161 in the direction of the first beam 1111 along the first direction X and covers the end face of the outer peripheral side of the second housing part 112.

[0133] The first part 1161 and the second part 1162 can each be plate-shaped, and the second part 1162 is formed relative to the first part 1161 by a bending process. By setting the second part 1162 to be bent relative to the first part 1161, it is beneficial to improve the overall structural rigidity of the press-fit member 116, and further beneficial to improve the connection reliability between the second box part 112 and the first beam 1111.

[0134] By bending the second part 1162 relative to the first part 1161 in the direction of the first beam 1111 along the first direction X, and making the second part 1162 cover the end face of the outer periphery of the second housing part 112, the risk of external water, oxygen, etc. causing corrosion to the end face of the outer periphery of the first flange part 412 and the second housing part 112 is reduced, which is beneficial to improving the structural strength of the housing 11 and the sealing reliability of the sealing element 114.

[0135] In some embodiments, such as Figure 8 As shown, along the first direction X, there is a first gap 11b between the second box portion 112 and the first beam 1111. The first gap 11b is located on the side of the connecting assembly 113 away from the first portion 1141. The second portion 1162 blocks at least part of the first gap 11b.

[0136] In some embodiments, such as Figure 6 and Figure 8 As shown, there is a first gap 11b between the second housing part 112 and the first beam 1111, and the first gap 11b is located on the side of the connecting assembly 113 away from the seal 114.

[0137] The first gap 11b is located on the side of the connecting assembly 113 away from the first part 1141, that is, in the space between the second housing part 112 and the first beam 1111, on the side of the connecting assembly 113 away from the seal 114, no related sealing structure or other structural components are provided. This is because it is sufficient to provide a reliable seal for the accommodating space 11a by providing the seal 114 only between the limiting member 1112 and the connecting assembly 113. Therefore, there is no need to provide any sealing structure on the side of the connecting assembly 113 away from the seal 114. This simplifies the structure of the housing 11 and reduces the amount of material used in the seal 114, which further helps to reduce the weight and production cost of the battery device 10.

[0138] By shielding at least part of the first gap 11b by the second part 1162, the second part 1162 can provide a certain degree of protection for at least part of the seal 114, reducing the risk of external particles or fragments cutting the seal 114, which is conducive to further improving the structural strength of the housing 11 and the sealing reliability of the seal 114.

[0139] In some embodiments, such as Figure 8As shown, along the first direction X, the orthographic projection of the second part 1162 is located inside the orthographic projection of the first beam 1111.

[0140] If the orthographic projection of the second part 1162 is located inside the orthographic projection of the first beam 1111, then the edge of the second part 1162 on the side away from the receiving space 11a can be flush with the edge of the first beam 1111, or located on the side of the first beam 1111 facing the receiving space 11a. In other words, along the side perpendicular to the first direction X away from the receiving space 11a, the second part 1162 is not positioned beyond the first beam 1111. This helps to reduce the additional space occupied by the pressing member 116 and reduces the risk of the pressing member 116 interfering with or scratching other structural members outside the housing 11.

[0141] In some embodiments, such as Figure 8 As shown, along the first direction X, the minimum distance e between the second part 1162 and the first beam 1111 satisfies: 0.5mm≤e≤2mm.

[0142] Optionally, e can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2mm, etc.

[0143] Understandably, during the use of the battery device 10, it will inevitably be subjected to external impacts, vibrations, and other loads. Therefore, a larger value for e is, to a certain extent, more conducive to reducing the risk of the second part 1162 impacting the first beam 1111 and generating noise during the use of the battery device 10. Conversely, a smaller value for e is, to a certain extent, more conducive to reducing the risk of corrosion caused by external water, oxygen, or debris coming into contact with the first flange 412, the seal 114, and the outer peripheral end face of the second housing 112 through the gap between the second part 1162 and the first beam 1111.

[0144] Therefore, setting e≤2mm helps reduce the risk of corrosion of the first flange 412 and the second housing 112 by external impurities such as water, oxygen, or debris, and also reduces the risk of external impurities cutting the seal 114. This improves the connection reliability between the second housing 112 and the first beam 1111, as well as the sealing reliability of the seal 114. Furthermore, setting e≤0.5mm helps reduce the risk of noise generated by the battery cell 30 when subjected to external impacts, vibrations, or other loads.

[0145] In some embodiments, such as Figure 8As shown, at least a portion of the first connecting member 41 protrudes toward the second box portion 112 relative to the first beam 1111 along the first direction X; along the first direction X, the distance by which the first connecting member 41 protrudes relative to the first beam 1111 is h1, and the distance by which the limiting member 1112 protrudes relative to the first beam 1111 is h2, 0≤|h1-h2|≤1mm.

[0146] For example, the first flange portion 412 has a dimension of h1.

[0147] In some embodiments, such as Figure 8 As shown, along the first direction X, the dimension of the first flange 412 is h1, and the distance by which the limiting member 1112 protrudes relative to the first beam 1111 is h2, where 0≤|h1-h2|≤1mm.

[0148] Optionally, |h1-h2| can be 0, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, etc.

[0149] Understandably, during the assembly of the battery device 10, the second housing portion 112 moves towards the first beam 1111 until it abuts against the larger of the two components along the first direction X: the first flange portion 412 and the limiting member 1112. At this point, the connection between the second housing portion 112 and the first beam 1111 is stable. However, if h1 and h2 are unequal, the second housing portion 112 can only abut against the larger of the two components along the first direction X: the first flange portion 412 and the limiting member 1112, while remaining spaced apart from the other component. The size of this gap can be |h1-h2|.

[0150] It is understandable that after the battery device 10 is assembled, the smaller the value of |h1-h2|, the more beneficial it is to reduce the size of the gap between the seal 114 and the limiting member 1112 or the first flange 412. In this way, it is more beneficial to improve the limiting and protective effect on the seal 114. Therefore, by setting 0≤|h1-h2|≤1mm, it is beneficial to improve the limiting and protective effect of the limiting member 1112 and the first flange 412 on the seal 114 along the side facing and away from the receiving space 11a, respectively, which is beneficial to further improve the structural stability and sealing reliability of the seal 114.

[0151] Understandably, when no external force is applied, the dimensions of the seal 114 in the first direction X satisfy h≥h1 and h≥h2, so that when the second housing part 112 abuts against the first connecting member 41 and the limiting member 1112, the second housing part 112 can compress the seal 114, so that the seal 114 can seal the gap between the second housing part 112 and the first beam 1111.

[0152] Understandably, during the process of riveting the second housing portion 112 and the first beam 1111 to the first connecting member 41 with rivet screws, as the second housing portion 112 gradually approaches the first beam 1111, the sealing member 114 is compressed until the second housing portion 112 abuts against the first flange portion 412 or the limiting member 1112, or the second housing portion 112 is spaced apart from the first flange portion 412 or the limiting member 1112, but the compression of the sealing member 114 reaches its maximum, and the second housing portion 112 can no longer generate displacement along the first direction X relative to the first beam 1111.

[0153] In other words, after the battery device 10 is assembled, the compression of the seal 114 reaches its maximum value. By setting h≥h1 and h≥h2, that is, setting h≥h1 and h≥h2, after the second housing part 112 is connected to the first beam 1111, the dimension of the compressed seal 114 along the first direction X is greater than or equal to the dimension of the limiting part 1112 along the first direction X, and greater than or equal to the dimension of the first flange part 412 along the first direction X. In this way, after the battery device 10 is assembled, the seal 114 has a sufficiently large compression, which is beneficial to improving the sealing reliability of the seal 114.

[0154] In some embodiments, such as Figure 6 and Figure 8 As shown, the housing 11 also includes a gasket 117, with an external thread 421 passing through the gasket 117, and the gasket 117 is sandwiched between the second housing part 112 and the second connector 42.

[0155] Understandably, in embodiments where the housing 11 also includes a press-fit member 116, a gasket 117 may be sandwiched between the press-fit member 116 and the second flange portion 422.

[0156] By setting the gasket 117, the gasket 117 can bear the friction of the second flange portion 422 and provide a certain preload for the connection between the second connector 42 and the first connector 41, thereby reducing the friction of the second flange portion 422 on the surface of the second housing portion 112 and thus reducing the wear on the second housing portion 112.

[0157] In some embodiments, such as Figure 6 As shown, the second housing portion 112 includes a first housing body 1121, a bending portion 1122, and a third flange portion 1123. The bending portion 1122 connects the first housing body 1121 and the third flange portion 1123, and is bent relative to the first housing body 1121 in the direction toward the first housing portion 111. The connecting assembly 113 connects the third flange portion 1123 and the first beam 1111. The sealing element 114 is sandwiched between the third flange portion 1123 and the first beam 1111.

[0158] The bending portion 1122 can be connected to the periphery of the first box body 1121 along the first direction X on one side, and is bent relative to the first box body 1121 toward the first beam 1111. The third flange portion 1123 can be connected to the bending portion 1122 along the other side of the first direction X, and is bent relative to the bending portion 1122. The third flange portion 1123 and the first box body 1121 can be arranged parallel to each other and are flat.

[0159] Optionally, the first box body 1121, the bending part 1122 and the third flange part 1123 can be integrally formed and formed by bending process.

[0160] By providing a second housing portion 112 comprising a first housing body 1121, a bent portion 1122, and a third flange portion 1123, with the first housing body 1121 and the third flange portion 1123 respectively bent relative to the bent portion 1122, the overall structural strength and bending resistance of the second housing portion 112 are improved, thus enhancing the structural stability of the housing 11. Furthermore, the external protrusion of the first housing body 1121 relative to the third flange portion 1123 of the housing 11 increases the volume of the accommodating space 11a and facilitates the connection between the third flange portion 1123 and the first beam 1111.

[0161] In some embodiments, such as Figure 6 and Figure 8 As shown, the orthographic projection of the outer peripheral edge of the second box section 112 along the first direction X is located inside the first beam 1111.

[0162] Optionally, the outer periphery of the second box portion 112 may be flush with the outer edge of the first beam 1111, or the outer edge of the second box portion 112 may be spaced apart from the outer edge of the first beam 1111, and the orthographic projection of the outer edge of the second box portion 112 along the first direction X may be located inside the first beam 1111.

[0163] This helps to reduce the space occupied by the second housing part 112 around the housing 11 and reduces the risk of interference between the second housing part 112 and other components.

[0164] In some embodiments, the limiting member 1112 is integrally formed with the first beam 1111.

[0165] The first beam 1111 integrally forms the limiting component 1112 during the forming process, which is beneficial to improving the connection strength between the limiting component 1112 and the first beam 1111, and also helps to simplify the processing technology of the limiting component 1112 and the first beam 1111.

[0166] Secondly, the electrical device provided in the embodiments of this application includes the battery device 10 provided in any of the above embodiments, and the battery device 10 is used to provide electrical energy.

[0167] The electrical device provided in this application has the same technical effect as the battery device 10 provided in any embodiment of this application, and will not be described again here.

[0168] In some embodiments, such as Figures 2 to 8 As shown, the battery device 10 provided in this application includes a housing 11 and a battery cell 30. The housing 11 includes a first housing portion 111, a second housing portion 112, a connecting assembly 113, and a sealing member 114. The first housing portion 111 and the second housing portion 112 overlap each other along a first direction X to form a receiving space 11a. The first housing portion 111 includes a first beam 1111 and a limiting member 1112. The limiting member 1112 is connected to the first beam 1111 and protrudes towards the second housing portion 112 relative to the first beam 1111 along the first direction X. The connecting assembly 113 connects the second housing portion 112 and the first beam 1111 and is located on the side of the limiting member 1112 away from the receiving space 11a. At least a portion of the sealing member 114 is sandwiched between the second housing portion 112 and the first beam 1111 and is located between the limiting member 1112 and the connecting assembly 113. The battery cell 30 is received within the receiving space 11a. The housing 11 also includes a first adhesive layer 115, which bonds the sealing element 114 to the first beam 1111.

[0169] The connecting assembly 113 includes a first connecting member 41, a second connecting member 42, and a pressing member 116. The first connecting member 41 is disposed on the first beam 1111 and has an internal thread portion 411. The second connecting member 42 has an external thread portion 421. The external thread portion 421 passes through the pressing member 116 and the second housing portion 112 and is threadedly connected to the internal thread portion 411. At least a portion of the pressing member 116 is sandwiched between the second connecting member 42 and the second housing portion 112. The pressing member 116 includes a first portion 1161 and a second portion 1162. The external thread portion 421 passes through the first portion 1161. The first portion 1161 is sandwiched between the second connecting member 42 and the second housing portion 112. The second portion 1162 is bent relative to the first portion 1161 in a first direction X toward the first beam 1111 and covers the end face of the outer peripheral side of the second housing portion 112. Along the first direction X, a first gap 11b exists between the second housing portion 112 and the first beam 1111. The first gap 11b is located on the side of the seal 114 facing away from the seal 114, and the second portion 1162 covers at least part of the first gap. Along the first direction X, the orthographic projection of the second portion 1162 lies inside the orthographic projection of the first beam 1111. Along the first direction X, the minimum distance e between the second portion 1162 and the first beam 1111 satisfies: 0.5mm ≤ e ≤ 2mm.

[0170] Along the first direction X, at least a portion of the first connector 41 protrudes relative to the first beam 1111 towards the second housing portion 112 along the first direction X; the distance by which the first connector 41 protrudes relative to the first beam 1111 is h1, and the distance by which the limiting member 1112 protrudes relative to the first beam 1111 is h2, where 0 ≤ |h1-h2| ≤ 1 mm. The connecting assembly 113 also includes a gasket 117, with an external thread 421 passing through the gasket 117, and the gasket 117 being sandwiched between the second housing portion 112 and the second connector 42.

[0171] The second housing portion 112 includes a first housing body 1121, a bent portion 1122, and a third flange portion 1123. The bent portion 1122 connects the first housing body 1121 and the third flange portion 1123, and is bent relative to the first housing body 1121 in a direction toward the second housing portion 112. A connecting assembly 113 connects the third flange portion 1123 to the first beam 1111. A sealing member 114 is sandwiched between the third flange portion 1123 and the first beam 1111. The outer peripheral edge of the second housing portion 112, when projected along the first direction X, lies inside the first beam 1111. The limiting member 1112 is integrally formed with the first beam 1111.

[0172] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. 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: The housing includes a first housing section, a second housing section, a connecting assembly, and a sealing element. The first housing section and the second housing section overlap each other along a first direction to form an accommodating space. The first housing section includes a first beam and a limiting member. The limiting member is connected to the first beam and protrudes towards the second housing section relative to the first beam along the first direction. The connecting assembly connects the second housing section and the first beam and is located on the side of the limiting member away from the accommodating space. The sealing element is sandwiched between the second housing section and the first beam. A single battery cell is housed within the housing space; The sealing element includes a first part, which is located between the limiting element and the connecting assembly.

2. The battery device according to claim 1, characterized in that, The first part is multiple, and the multiple first parts are spaced apart along the extension direction of the seal; The seal also includes a second portion that connects two adjacent first portions, with at least a portion of the second portion on the side facing away from the receiving space located between two adjacent connecting components.

3. The battery device according to claim 1, characterized in that, The housing also includes a first adhesive layer, which bonds the seal to the first beam.

4. The battery device according to claim 1, characterized in that, The connection component includes: A first connecting member is disposed on the first beam and has an internal thread portion; The second connector has an external threaded portion; A press-fitting component, wherein the external threaded portion passes through the press-fitting component and the second housing portion and is threadedly connected to the internal threaded portion, and at least a portion of the press-fitting component is sandwiched between the second connecting component and the second housing portion.

5. The battery device according to claim 4, characterized in that, The press-fit component includes a first part and a second part. The external threaded part passes through the first part. The first part is sandwiched between the second connector and the second housing part. The second part is bent relative to the first part in the first direction toward the first beam and covers the end face of the outer peripheral side of the second housing part.

6. The battery device according to claim 5, characterized in that, Along the first direction, there is a first gap between the second box portion and the first beam, the first gap being located on the side of the connecting assembly opposite to the first portion, and the second portion obscuring at least part of the first gap.

7. The battery device according to claim 5, characterized in that, Along the first direction, the orthographic projection of the second part is located inside the orthographic projection of the first beam.

8. The battery device according to claim 5, characterized in that, Along the first direction, the minimum distance e between the second part and the first beam satisfies: 0.5mm≤e≤2mm.

9. The battery device according to claim 5, characterized in that, At least a portion of the first connector protrudes toward the second housing portion relative to the first beam along the first direction; Along the first direction, the distance by which the first connecting member protrudes relative to the first beam is h1, and the distance by which the limiting member protrudes relative to the first beam is h2, where 0 ≤ |h1-h2| ≤ 1 mm.

10. The battery device according to claim 4, characterized in that, The connecting assembly further includes a gasket, the external threaded portion passes through the gasket, and the gasket is sandwiched between the second housing portion and the second connecting member.

11. The battery device according to claim 1, characterized in that, The second housing portion includes a first housing body, a bent portion, and a third flange portion. The bent portion connects the first housing body and the third flange portion and is bent relative to the first housing body in a direction toward the first housing portion. The connecting assembly connects the third flange portion and the first beam, and the sealing element is sandwiched between the third flange portion and the first beam.

12. The battery device according to claim 1, characterized in that, The orthographic projection of the outer peripheral edge of the second box section along the first direction is located inside the first beam.

13. The battery device according to any one of claims 1 to 12, characterized in that, The limiting component is integrally formed with the first beam.

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

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