Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device, the battery device comprises a box body and a battery monomer, the box body comprises a first wall, and the first wall comprises a wall body and a reinforcing part. The battery monomer is accommodated in the box body, a shell of the battery monomer comprises a second wall, and the second wall intersects with the wall body. The reinforcing part extends towards the battery monomer relative to the wall body, and at least part of the reinforcing part is arranged at the side part, facing the second wall, of the battery monomer. According to the battery device provided by the invention, the structural rigidity of the battery device is improved, so that the resonant frequency of the battery device is improved, and the risk that the battery device is damaged due to resonance under the action of an external load is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery device and an electrical device. Background Art

[0002] Battery devices are widely used in electronic devices, such as mobile phones, laptop computers, battery-powered vehicles, electric vehicles, 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, the reliability of battery devices is also an issue that needs to be considered. Therefore, how to improve the reliability of battery devices is an ongoing problem in battery technology. Summary of the Utility Model

[0004] The present application provides a battery device and an electrical device to improve the reliability of the battery device.

[0005] The present application is achieved by the following technical solutions:

[0006] In a first aspect, the battery device provided by the embodiments of the present application includes a box body and battery cells. The box body includes a box main body and a cover body. The cover body is disposed on the box main body along a first direction. The cover body includes a first wall, and the first wall includes a wall main body and a strengthening portion. The battery cells are accommodated in the box body. The outer shell of the battery cells includes a second wall, and the second wall intersects with the wall main body. The strengthening portion extends relative to the wall main body toward the battery cells, and at least a part of the strengthening portion is disposed on the side of the battery cells facing the second wall.

[0007] For the battery device provided by the embodiments of the present application, by providing that the first wall of the cover body of the box body includes a strengthening portion, and setting that at least a part of the strengthening portion is disposed on one side of the battery cells facing the second wall, it is beneficial to improve the overall structural stiffness of the battery device, thereby increasing the resonance frequency of the battery device and reducing the risk of resonance occurring during the process of external loads on the battery device. In this way, it is beneficial to reduce the risk of damage to the battery device due to resonance and improve the reliability of the battery device.

[0008] According to some embodiments of the present application, the wall main body and the strengthening portion are integrally formed.

[0009] In the above solution, by setting the wall main body and the strengthening portion to be integrally formed, it is beneficial to improve the connection strength between the strengthening portion and the wall main body, reduce the risk of fracture, torsion, bending and other deformations of the strengthening portion relative to the wall main body, and further beneficial to improve the overall stiffness of the battery device, thereby increasing the resonance frequency of the battery device.

[0010] According to some embodiments of the present application, the battery device further includes an adhesive layer, and the adhesive layer adhesively connects the reinforcing portion to the second wall of the battery cell.

[0011] In the above solution, it is beneficial to further improve the overall structural stiffness of the battery device, thereby increasing the resonance frequency of the battery cell, and further reducing the risk of damage to the battery device due to resonance under the action of external loads.

[0012] According to some embodiments of the present application, the size of the cover body in the first direction is smaller than the size of the box body in the first direction.

[0013] In the above solution, setting the size of the cover body in the first direction to be smaller than the size of the box body in the first direction is beneficial to improving the overall structural stiffness of the battery device while facilitating the processing of the first wall.

[0014] According to some embodiments of the present application, the first wall includes glass fiber.

[0015] In the above solution, by setting the first wall to include glass fiber, the ability of the first wall to resist torsion or bending deformation can be improved. Thus, it is beneficial to improve the structural strength of the first wall, and further beneficial to improve the overall structural stiffness of the battery device to increase the resonance frequency of the battery device.

[0016] According to some embodiments of the present application, the elastic modulus E of the reinforcing portion satisfies: E≥1500MPa.

[0017] In the above solution, by setting the elastic modulus E of the reinforcing portion to satisfy: E≥1500MPa, it is beneficial to improve the overall stiffness of the reinforcing portion and the battery device, thereby increasing the resonance frequency of the battery device and reducing the risk of resonance of the battery device under the excitation of external loads.

[0018] According to some embodiments of the present application, the first wall includes a plurality of reinforcing portions. The reinforcing portions extend along the first direction with respect to the wall body. The plurality of reinforcing portions extend along the second direction and are spaced along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other in pairs. The battery device includes a plurality of battery cells, and the plurality of battery cells are arranged in an array along the second direction and the third direction. Any one of the reinforcing portions is provided at the side of the plurality of battery cells along the third direction.

[0019] In the above solution, it is beneficial to further increase the structural stiffness of the battery device, increase the resonance frequency of the battery device, and facilitate the processing of the reinforcing portion.

[0020] According to some embodiments of the present application, reinforcing portions are provided on both sides of any one of the battery cells along the third direction.

[0021] In the above solution, there is a strengthening portion between any two adjacent battery cells along the third direction, which is beneficial to further reduce the risks of the battery device shaking or twisting and deforming, further beneficial to improving the overall structural stiffness of the battery device, and then improving the resonance frequency of the battery device.

[0022] According to some embodiments of the present application, the strengthening portion extends along the first direction relative to the wall body. The strengthening portion includes a first strengthening portion and a second strengthening portion. The first strengthening portion is provided on the side of the battery cell along the second direction, and the second strengthening portion is provided on the side of the battery cell along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0023] In the above solution, the first strengthening portion and the second strengthening portion can respectively provide a limiting effect on the battery cell along the second direction and the third direction to improve the torsional stiffness of the battery cell along multiple directions. In this way, it is beneficial to further improve the structural stiffness of the battery device, and then improve the resonance frequency of the battery device.

[0024] According to some embodiments of the present application, the first strengthening portion extends along the third direction, and the second strengthening portion extends along the second direction. The first strengthening portion and the second strengthening portion intersect.

[0025] In the above solution, by setting the first strengthening portion to extend along the third direction, the second strengthening portion to extend along the second direction, and setting the first strengthening portion and the second strengthening portion to intersect, it is beneficial to improve the torsional strength of the battery cell to further improve the overall structural stiffness of the battery device, and then improve the resonance frequency of the battery device.

[0026] According to some embodiments of the present application, the first strengthening portion extends along the third direction, and the second strengthening portion is connected to at least one side of the first strengthening portion along the second direction facing the battery cell. The second strengthening portions on the side of the same second wall along the third direction are spaced apart.

[0027] In the above solution, the first strengthening portion and the second strengthening portion together provide a limiting effect on the enclosed battery cell along the second direction and the third direction to reduce the risk of the battery cell generating torsional deformation, which is further beneficial to improving the stiffness of the battery device. And because the second strengthening portions on the side of the same second wall along the third direction are spaced apart, it is beneficial to reduce the distance that the second strengthening portion extends along the second direction, which is beneficial to simplifying the processing technology of the strengthening portion.

[0028] According to some embodiments of the present application, the dimension of the outer shell along the third direction is smaller than the dimension along the second direction.

[0029] In the above solution, the distance that the first reinforcing portion extends along the third direction can be reduced, and it is convenient to increase the distance between the two second reinforcing portions on the side of the same second wall along the third direction, so as to reduce the distance that the second reinforcing portion extends along the second direction. In this way, it is further convenient for the processing of the reinforcing portion, which is beneficial to reducing the processing difficulty of the first wall.

[0030] According to some embodiments of the present application, first reinforcing portions are provided on both sides of any battery cell along the second direction, and / or second reinforcing portions are provided on both sides of any battery cell along the third direction.

[0031] In the above solution, any battery cell is provided with reinforcing portions on at least two sides, which is beneficial to improving the torsional stiffness of the battery cells in the battery device, thereby improving the overall structural stiffness of the battery device, and further beneficial to increasing the resonance frequency of the battery device.

[0032] In a second aspect, the electrical device provided by the embodiments of the present application includes the battery device provided by any of the above embodiments, and the battery device is used to provide electrical energy.

[0033] Since the electrical device provided by the embodiments of the present application adopts the battery device provided by any of the above embodiments, it has the same technical effects, which will not be elaborated here.

[0034] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0037] Figure 2 It is a schematic structural diagram of a battery device provided by an embodiment of the present application;

[0038] Figure 3 It is a schematic structural diagram of a battery module in the battery device provided by an embodiment of the present application;

[0039] Figure 4 It is an exploded structural diagram of a battery cell in the battery device provided by an embodiment of the present application;

[0040] Figure 5Explosion structure schematic diagram of another battery device provided by an embodiment of the present application;

[0041] Figure 6 Cross-sectional structure schematic diagram of the battery device provided by an embodiment of the present application;

[0042] Figure 7 For Figure 6 Partial enlarged view at A in

[0043] Figure 8 Structure schematic diagram of a kind of cover body in the battery device provided by an embodiment of the present application;

[0044] Figure 9 Structure schematic diagram of another kind of cover body in the battery device provided by an embodiment of the present application;

[0045] Figure 10 Structure schematic diagram of yet another kind of cover body in the battery device provided by an embodiment of the present application;

[0046] Figure 11 Structure schematic diagram of still another kind of cover body in the battery device provided by an embodiment of the present application.

[0047] In the drawings, the drawings are not necessarily drawn to scale.

[0048] Explanation of reference numerals:

[0049] 1 - Vehicle;

[0050] 10 - Battery device; 11 - Box body; 111 - Box main body; 112 - Cover body; 113 - First wall; 1131 - Wall main body; 1132 - Reinforcing part; 1132a - First reinforcing part; 1132b - Second reinforcing part; 1a - Motor; 1b - Controller;

[0051] 20 - Battery module;

[0052] 30 - Battery cell; 31 - Outer shell; 311 - Shell body; 312 - End cover; 313 - Second wall; 32 - Electrode assembly; 321 - Electrode main body; 322 - Tab; 33 - Electrode terminal;

[0053] 40 - Adhesive layer;

[0054] X - First direction; Y - Second direction; Z - Third direction. Detailed implementation manners

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts belong to the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0057] Referring to "embodiments" in this application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0058] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] The term "and / or" in this application is merely a description of the associated relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0060] The term "plurality" as used in this application refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0061] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0062] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0063] In some embodiments, the battery apparatus may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0064] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0065] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0066] In some embodiments, the box body may be part of the chassis structure of a vehicle. For example, part of the box body may become at least part of the floor of the vehicle, or part of the box body may become at least part of the crossbeam and longitudinal beam of the vehicle.

[0067] In some embodiments, the battery apparatus may be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0068] In the embodiments of the present application, the battery cell may be a secondary battery, and the secondary battery refers to a battery cell that can activate the active material through charging after discharging.

[0069] The battery cell may be, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc.

[0070] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the short circuit between the positive and negative electrodes and allow the active ions to pass through.

[0071] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material provided on at least one surface of the positive electrode current collector.

[0072] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is provided on any one or both of the two opposite surfaces of the positive electrode current collector.

[0073] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (such as 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.).

[0074] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery cell may also be used.

[0075] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0076] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc. may be used.

[0077] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is provided on any one or both of the two opposite surfaces of the negative electrode current collector.

[0078] As an example, the negative electrode active material may be a negative electrode active material for a battery cell well-known in the art. 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 material, tin-based material, and lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compound, silicon-carbon composite, silicon-nitrogen composite, and silicon alloy. The tin-based material may be selected from at least one of elemental tin, tin oxide compound, and tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as the negative electrode active material of the battery cell may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0079] In some embodiments, the separator is an isolation film. The present application does not particularly limit the type of the isolation film, and any well-known porous structure isolation film with good chemical stability and mechanical stability can be selected.

[0080] As an example, the main material of the isolation film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The isolation film can be a single-layer film or a multi-layer composite film, without particular limitation. When the isolation film 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 can be attached to the surfaces of the positive and negative electrodes.

[0081] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0082] In some embodiments, the electrode assembly has a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0083] In some embodiments, the electrode assembly has a stacked structure.

[0084] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum plastic film, etc.

[0085] In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, the electrolyte and other substances. The housing body can be provided with one or more openings. The end cap can also be provided with one or more.

[0086] 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 can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing body.

[0087] In some embodiments, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cell.

[0088] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc. The embodiments of the present application have no particular limitation.

[0089] During the operation of the battery device, it will inevitably be subjected to various external loads such as impacts and vibrations. When the frequency of the impact or vibration received by the battery device reaches its own resonance frequency, the battery device will generate resonance. When the battery device generates resonance, its vibration amplitude will increase significantly, seriously affecting the structural stability of the battery device. In the related art, the resonance frequency of the battery device is relatively low, and it can reach the resonance frequency of the battery device under a small external vibration excitation. Thus, it seriously affects the structural stability and reliable performance of the battery device.

[0090] In view of this, an embodiment of the present application provides a battery device including a box body and battery cells. The box body includes a box main body and a cover body. The cover body is covered on the box main body along a first direction. The cover body includes a first wall, and the first wall includes a wall main body and a reinforcing portion. The battery cells are accommodated in the box body. The outer shell of the battery cells includes a second wall, and the second wall intersects with the wall main body. The reinforcing portion extends relative to the wall main body toward the battery cells, and at least a part of the reinforcing portion is provided on the side of the battery cells facing the second wall.

[0091] For the battery device provided by the embodiment of the present application, by providing that the first wall of the cover body of the box body includes a reinforcing portion and setting that at least a part of the reinforcing portion is provided on one side of the battery cells facing the second wall, it is beneficial to improve the overall structural stiffness of the battery device, thereby increasing the resonance frequency of the battery device and reducing the risk of resonance generated by the battery device during the process of external loads. Thus, it is beneficial to reduce the risk of damage to the battery device due to resonance and improve the reliable performance of the battery device.

[0092] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using battery devices.

[0093] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in electrical devices such as vehicles, ships, or aircraft. The power supply system of the electrical device can be composed of the battery device disclosed in the present application.

[0094] An embodiment of the present application provides an electrical device using a battery device as a power source. The electrical device can be but is not limited to mobile phones, tablet computers, laptop computers, electric toys, electric tools, electric bicycles, electric motorcycles, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0095] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical device in an embodiment of the present application for illustration.

[0096] Please refer to Figure 1 , Figure 1Schematic structural diagram of vehicle 1 provided by an embodiment of the present application. Vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 10 is disposed inside vehicle 1. The battery device 10 can be disposed at the bottom, head, or tail of vehicle 1. The battery device 10 can be used for power supply of vehicle 1. For example, the battery device 10 can serve as the operating power source of vehicle 1 and be used for the circuit system of vehicle 1, such as the working power requirements for starting, navigation, and operation of vehicle 1.

[0097] Vehicle 1 may further 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, it is used for the working power requirements for starting, navigation, and driving of vehicle 1.

[0098] In some embodiments of the present application, the battery device 10 can not only serve as the operating power source of vehicle 1, but also serve as the driving power source of vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1.

[0099] Please refer to Figure 2 and Figure 3 , Figure 2 Schematic structural diagram of the battery device 10 provided by an embodiment of the present application, Figure 3 Schematic structural diagram of the battery module 20 in the battery device 10 provided by an embodiment of the present application. The battery device 10 includes a box body 11 and battery cells 30. The battery cells 30 are accommodated in the box body 11. Among them, the box body 11 is used to provide an accommodation space for the battery cells 30, and the box body 11 can adopt various structures. In some embodiments, the box body 11 may include a box main body 111 and a cover body 112. The box main body 111 and the cover body 112 are mutually covered, and the box main body 111 and the cover body 112 jointly define an accommodation space for accommodating the battery cells 30. The cover body 112 and the box main body 111 can be hollow structures with one end open. The cover body 112 can be a plate-like structure. The cover body 112 is covered on the opening side of the box main body 111 so that the box main body 111 and the cover body 112 jointly define an accommodation space; the box main body 111 and the cover body 112 can also be hollow structures with one side open, and the opening side of the cover body 112 is covered on the opening side of the box main body 111.

[0100] In the battery device 10, there may be multiple battery cells 30. The multiple battery cells 30 can be connected in series, in parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 30. The multiple battery cells 30 can be directly connected in series, in parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 30 is accommodated in the box body 11. Of course, in the battery device 10, multiple battery cells 30 can also be first connected in series, in parallel, or in a combined series-parallel connection to form the form of a battery module 20, and then multiple battery modules 20 are connected in series, in parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box body 11. The battery device 10 can also include other structures. For example, the battery device 10 can also include a busbar component for realizing the electrical connection among the multiple battery cells 30.

[0101] 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 thereto.

[0102] Please refer to Figure 4 , Figure 4 , which is a schematic diagram of the explosion structure of the battery cell 30 in the battery device 10 provided in the embodiment of the present application. As Figure 4 shown, the battery cell 30 includes a housing 31, an electrode assembly 32, and an electrode terminal 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.

[0103] The casing 311 is a component for cooperating with the end cap 312 to form the internal environment of the battery cell 30. Among them, the formed internal environment can be used to accommodate the electrode assembly 32, the electrolyte, and other components. The casing 311 and the end cap 312 can be independent components. The casing 311 can be of various shapes and various sizes. Specifically, the shape of the casing 311 can be determined according to the specific shape and size of the electrode assembly 32. The material of the casing 311 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0104] The end cap 312 refers to a component that covers the opening of the housing 311 to isolate the internal environment of the battery cell 30 from the external environment. Without limitation, the shape of the end cap 312 can be adapted to the shape of the housing 311 to fit the housing 311. Optionally, the end cap 312 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 312 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 30 to have higher structural strength and improved reliability. Functional components such as electrode terminals 33 can be provided on the end cap 312. The electrode terminal 33 can be used for electrical connection with the electrode assembly 32 to output or input the electrical energy of the battery cell 30. The material of the end cap 312 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this. In some embodiments, an insulating structure can also be provided on the inner side of the end cap 312, and the insulating structure can be used to isolate the electrical connection components in the housing 311 from the end cap 312 to reduce the risk of short circuit. Exemplarily, the insulating structure can be plastic, rubber, etc.

[0105] The electrode assembly 32 is a component in the battery cell 30 where an electrochemical reaction occurs. The housing 311 can contain one or more electrode assemblies 32. The electrode assembly 32 is mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and usually, a separator is provided between the positive electrode plate and the negative electrode plate to separate the positive electrode plate and the negative electrode plate to avoid internal short circuit between the positive electrode plate and the negative electrode plate. The parts of the positive electrode plate and the negative electrode plate with active materials constitute the electrode body 321 of the electrode assembly 32, and the parts of the positive electrode plate and the negative electrode plate without active materials respectively constitute the electrode tabs 322. The positive electrode tab 322 and the negative electrode tab 322 can be located at one end of the electrode body 321 together or at both ends of the electrode body 321 respectively. During the charge and discharge process of the battery cell 30, the positive active material and the negative active material react with the electrolyte, and the electrode tabs 322 are connected to the electrode terminals 33 to form a current loop.

[0106] In the first aspect, as Figure 2 、 Figure 4 、 Figure 5 and Figure 6As shown in the figure, an embodiment of the present application provides a battery device 10, which includes a box body 11 and battery cells 30. The box body 11 includes a box main body 111 and a cover body 112. The cover body 112 is covered on the box main body 111 along the first direction X. The cover body 112 includes a first wall 113, and the first wall 113 includes a wall main body 1131 and a strengthening part 1132. The battery cells 30 are accommodated in the box body 11. The outer shell 31 of the battery cells 30 includes a second wall 313, and the second wall 313 intersects with the wall main body 1131. The strengthening part 1132 extends relative to the wall main body 1131 towards the battery cells 30, and at least part of the strengthening part 1132 is arranged on the side of the battery cells 30 facing the second wall 313.

[0107] The cover body 112 of the box body 11 includes a first wall 113. Optionally, the cover body 112 may include one, two or more first walls 113. The first wall 113 may be arranged on the side of the battery cells 30 along the first direction X, or the first wall 113 may be located on the side of the battery cells 30 intersecting with the first direction X.

[0108] The first wall 113 includes a wall main body 1131 and a strengthening part 1132. Optionally, the wall main body 1131 and the strengthening part 1132 may be integrally formed, or after the wall main body 1131 and the strengthening part 1132 are respectively processed and formed, they are connected together by welding or bonding. Exemplarily, it may be set that the strengthening part 1132 and the wall main body 1131 are integrally injection-molded by an injection molding process.

[0109] The outer shell 31 of the battery cells 30 includes a second wall 313, and the second wall 313 intersects with the wall main body 1131. At least part of the strengthening part 1132 is arranged on one side of the battery cells 30 facing the second wall 313. Optionally, the outer shell 31 may be prismatic or cylindrical. For the battery cells 30 with a cylindrical outer shell 31, the outer shell 31 may have one second wall 313. For the battery cells 30 with a prismatic outer shell 31, one battery cell 30 may have four second walls 313.

[0110] Optionally, it may be set that the strengthening part 1132 is arranged opposite to one, two, three or four first walls 113 of the same battery cell 30. In other words, the strengthening part 1132 may be arranged on any one side or multiple sides of the battery cell 30 perpendicular to the normal direction of the wall main body 1131.

[0111] The battery device 10 may include a plurality of battery cells 30. It may be set that the strengthening part 1132 is arranged opposite to the second walls 313 of a part of the battery cells 30, or it may be set that at least one first wall 113 of any one battery cell 30 is arranged opposite to the strengthening part 1132.

[0112] At least a part of the reinforcing portion 1132 is disposed on the side of the battery cell 30 facing the second wall 313. Optionally, the entire reinforcing portion 1132 can be disposed on the side of the second wall 313 of the battery cell 30, or a part of the reinforcing portion 1132 can be disposed on the side of the second wall 313 of the battery cell 30. Optionally, the reinforcing portion 1132 can be disposed opposite to a part of the second wall 313, or the reinforcing portion 1132 can be disposed opposite to the entire second wall 313.

[0113] The second wall 313 can be in close contact with the reinforcing portion 1132, or the second wall 313 can be spaced apart from the reinforcing portion 1132, or there is a connecting member between the second wall 313 and the reinforcing portion 1132 to connect the reinforcing portion 1132 and the second wall 313 through the connecting member.

[0114] If the reinforcing portion 1132 extends towards the battery cell 30 relative to the wall body 1131, then optionally, the reinforcing portion 1132 can extend in a plate shape, a column shape, or other irregular shapes. The reinforcing portion 1132 can be integrally formed, or the reinforcing portion 1132 can be provided to include a plurality of spaced-apart parts, which can be selected as needed.

[0115] If at least a part of the reinforcing portion 1132 is disposed on the side portion of the second wall 313 of the battery cell 30, then the reinforcing portion 1132 is disposed between the battery cells 30 or between the battery cell 30 and the box body 11, which plays a certain role in limiting and strengthening the battery cell 30, reducing the risk of relatively violent shaking of the battery cell 30, and reducing the risk of deformation such as torsion or bending of the battery cell 30. In this way, it is beneficial to increase the overall structural stiffness of the battery device 10, thereby increasing the resonance frequency of the battery device 10. Under the action of an external excitation load, the battery device 10 is not likely to generate resonance, reducing the risk of damage due to excessive amplitude of the battery device 10.

[0116] In the battery device 10 provided by the embodiment of the present application, by providing the first wall 113 of the cover body 112 of the box body 11 to include the reinforcing portion 1132 and setting at least a part of the reinforcing portion 1132 on the side of the battery cell 30 facing the second wall 313, it is beneficial to increase the overall structural stiffness of the battery device 10, thereby increasing the resonance frequency of the battery device 10, reducing the risk of resonance generated during the process of the external load on the battery device 10. In this way, it is beneficial to reduce the risk of damage to the battery device 10 due to resonance and improve the reliable performance of the battery device 10.

[0117] In some embodiments, the wall body 1131 and the reinforcing portion 1132 are integrally formed.

[0118] The wall body 1131 and the reinforcing portion 1132 are integrally formed. Optionally, the wall body 1131 and the reinforcing portion 1132 can be formed by casting or injection molding.

[0119] By integrally forming the wall body 1131 and the reinforcing part 1132, it is beneficial to improve the connection strength between the reinforcing part 1132 and the wall body 1131, reduce the risk of the reinforcing part 1132 breaking or deforming such as twisting and bending relative to the wall body 1131, further beneficial to improve the overall stiffness of the battery device 10, and then improve the resonance frequency of the battery device 10.

[0120] In some embodiments, such as Figure 6 and Figure 7 shown, the battery device 10 further includes an adhesive layer 40, and the adhesive layer 40 adhesively connects the reinforcing part 1132 and the second wall 313 of the battery cell 30.

[0121] The adhesive layer 40 adhesively connects the reinforcing part 1132 and the second wall 313 of the battery cell 30, then the adhesive layer 40 plays a connecting role between the reinforcing part 1132 and the second wall 313, and the adhesive layer 40 fills the gap between the second wall 313 and the reinforcing part 1132. In this way, it is beneficial to further improve the overall structural stiffness of the battery device 10, and then improve the resonance frequency of the battery cell 30, and further beneficial to reduce the risk of the battery device 10 being damaged due to resonance under the action of external loads.

[0122] In some embodiments, such as Figure 5 , Figure 6 and Figure 7 shown, the size of the cover body 112 along the first direction X is smaller than the size of the box body 111 along the first direction X.

[0123] In the battery device 10, the size of the cover body 112 along the first direction X is smaller than the size of the box body 111 along the first direction, and the load-bearing requirement for the cover body 112 is relatively low. It can include an injection molded part. In this way, the reinforcing part 1132 and the wall body 1131 of the first wall 113 can be processed by an injection molding process, and the first wall 113 can be arranged on the side of the battery cell 30 facing the electrode terminal 33. The reinforcing part 1132 is inserted into the side of the battery cell 30 from the side of the battery cell 30 close to the electrode terminal 33, and has a more significant limiting effect on the battery cell 30.

[0124] Therefore, setting the size of the cover body 112 along the first direction X to be smaller than the size of the box body 111 along the first direction is beneficial to improving the overall structural stiffness of the battery device 10 while facilitating the processing of the first wall 113.

[0125] In some embodiments, the first wall 113 includes glass fiber.

[0126] The first wall 113 includes glass fibers, so the first wall 113 can be formed by an injection molding process. The glass fibers can be added to the first wall 113 during the injection molding process and cured together with the first wall 113.

[0127] By setting the first wall 113 to include glass fibers, the ability of the first wall 113 to resist torsion or bending deformation can be improved. Thus, it is beneficial to improve the structural strength of the first wall 113, and further beneficial to improve the overall structural stiffness of the battery device 10 to increase the resonance frequency of the battery device 10.

[0128] In some embodiments, the elastic modulus E of the reinforcing portion 1132 satisfies: E≥1500 MPa.

[0129] By setting the elastic modulus E of the reinforcing portion 1132 to satisfy: E≥1500 MPa, it is beneficial to improve the overall stiffness of the reinforcing portion 1132 and the battery device 10, and further increase the resonance frequency of the battery device 10, reducing the risk of resonance of the battery device 10 under the excitation of external loads.

[0130] In some embodiments, such as Figure 8 and Figure 9 shown, the first wall 113 includes a plurality of reinforcing portions 1132. The reinforcing portions 1132 extend along the first direction X with respect to the wall body 1131. The plurality of reinforcing portions 1132 extend along the second direction Y and are spaced along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. The battery device 10 includes a plurality of battery cells 30. The plurality of battery cells 30 are arranged in an array along the second direction Y and the third direction Z. Any one of the reinforcing portions 1132 is provided on the side of the plurality of battery cells 30 along the third direction Z.

[0131] Optionally, the second direction Y can be the direction in which the battery device 10 has a larger size, or the second direction Y can be the direction in which the battery device 10 has a smaller size, which can be selected according to actual needs.

[0132] Optionally, reinforcing portions 1132 can be provided on both sides of each battery cell 30 along the third direction Z, or only some of the battery cells 30 are provided with reinforcing portions 1132 on at least one side along the third direction Z. Two adjacent columns of battery cells 30 along the third direction Z can share the same reinforcing portion 1132.

[0133] Thus, one reinforcing portion 1132 is provided on the side of the plurality of battery cells 30 along the third direction Z to provide a limiting and anti-torsion effect for the plurality of battery cells 30 along the third direction Z, which is beneficial to further increase the structural stiffness of the battery device 10, increase the resonance frequency of the battery device 10, and facilitate the processing of the reinforcing portion 1132.

[0134] In some embodiments, reinforcing portions 1132 are provided on both sides of any battery cell 30 along the third direction Z.

[0135] In this way, there are reinforcing portions 1132 between any two adjacent columns of battery cells 30 along the third direction Z, which is beneficial to further reduce the risks of the battery device 10 shaking or twisting and deforming, and further beneficial to improving the overall structural stiffness of the battery device 10, thereby increasing the resonance frequency of the battery device 10.

[0136] In some embodiments, such as Figure 10 and Figure 11 As shown, the reinforcing portion 1132 extends along the first direction X relative to the wall body 1131. The reinforcing portion 1132 includes a first reinforcing portion 1132a and a second reinforcing portion 1132b. The first reinforcing portion 1132a is provided on the side of the battery cell 30 along the second direction Y, and the second reinforcing portion 1132b is provided on the side of the battery cell 30 along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0137] The reinforcing portion 1132 includes a first reinforcing portion 1132a and a second reinforcing portion 1132b. The first reinforcing portion 1132a and the second reinforcing portion 1132b can be respectively in the shape of a plate, and the first reinforcing portion 1132a extends along the third direction Z, while the second reinforcing portion 1132b extends along the second direction Y. Optionally, the first reinforcing portions 1132a can be arranged at intervals, or the first reinforcing portion 1132a and the second reinforcing portion 1132b are arranged to be connected to each other. Exemplarily, the first reinforcing portion 1132a and the second reinforcing portion 1132b can be integrally formed.

[0138] Optionally, a first reinforcing portion 1132a or a second reinforcing portion 1132b can be respectively provided on at least one side of any battery cell 30 along the second direction Y and the third direction Z, or a first reinforcing portion 1132a or a second reinforcing portion 1132b can be respectively provided on at least one side of a part of the plurality of battery cells 30 along the second direction Y and the third direction Z.

[0139] The first reinforcing portion 1132a is provided on the side of the battery cell 30 along the second direction Y, and the second reinforcing portion 1132b is provided on the side of the battery cell 30 along the third direction Z. Then the first reinforcing portion 1132a and the second reinforcing portion 1132b can respectively provide a limiting effect on the battery cell 30 along the second direction Y and the third direction Z to improve the torsional stiffness of the battery cell 30 along multiple directions. In this way, it is beneficial to further improve the structural stiffness of the battery device 10, thereby increasing the resonance frequency of the battery device 10.

[0140] In some embodiments, such as Figure 10As shown, the first reinforcing part 1132a extends along the third direction Z, the second reinforcing part 1132b is arranged to extend along the second direction Y, and the first reinforcing part 1132a and the second reinforcing part 1132b intersect.

[0141] One first reinforcing part 1132a and one second reinforcing part 1132b can be arranged to intersect, or multiple mutually parallel first reinforcing parts 1132a and multiple mutually parallel second reinforcing parts 1132b can be respectively arranged to intersect, which can be set as needed.

[0142] Exemplarily, first reinforcing parts 1132a can be arranged on both sides of any battery cell 30 along the second direction Y, and second reinforcing parts 1132b can be arranged on both sides of any battery cell 30 along the third direction Z, and multiple first reinforcing parts 1132a and second reinforcing parts 1132b intersect to form a grid.

[0143] By arranging the first reinforcing part 1132a to extend along the third direction Z, the second reinforcing part 1132b to extend along the second direction Y, and arranging the first reinforcing part 1132a and the second reinforcing part 1132b to intersect, it is beneficial to improve the torsional strength of the battery cell 30, so as to further improve the overall structural stiffness of the battery device 10, and then improve the resonance frequency of the battery device 10.

[0144] In some embodiments, as Figure 11 shown, the first reinforcing part 1132a extends along the third direction Z, the second reinforcing part 1132b is connected to at least one side of the first reinforcing part 1132a facing the battery cell 30 along the second direction Y, and the second reinforcing parts 1132b on the side of the same second wall 313 along the third direction Z are arranged at intervals.

[0145] Since the first reinforcing part 1132a extends along the third direction Z and is arranged on the side of the battery cell 30 along the second direction Y, one first reinforcing part 1132a can be arranged to face the second walls 313 of multiple battery cells 30 on both sides of the second direction Y.

[0146] The second reinforcing part 1132b is connected to at least one side of the first reinforcing part 1132a facing the battery cell 30 along the second direction Y, and the second reinforcing part 1132b is arranged on the side of the battery cell 30 along the third direction Z. Since the second reinforcing parts 1132b on the side of the same second wall 313 along the third direction Z are arranged at intervals, the second wall 313 on the side of the battery cell 30 along the third direction Z can face two second reinforcing parts 1132b, and the two second reinforcing parts 1132b are arranged opposite to both sides of the second wall 313 along the second direction Y, and there is no second reinforcing part 1132b opposite to the middle of the second wall 313.

[0147] The first reinforcing portion 1132a and the second reinforcing portion 1132b together provide a limiting effect on the enclosed battery cell 30 in the second direction Y and the third direction Z, so as to reduce the risk of torsional deformation of the battery cell 30, which is further beneficial to improving the stiffness of the battery device 10. And because the second reinforcing portions 1132b on the side of the same second wall 313 along the third direction Z are arranged at intervals, it is beneficial to reduce the distance that the second reinforcing portion 1132b extends along the second direction Y, which is beneficial to simplifying the processing technology of the reinforcing portion 1132.

[0148] In some embodiments, the dimension of the outer shell 31 along the third direction Z is smaller than the dimension along the second direction Y.

[0149] If the dimension of the outer shell 31 along the third direction Z is smaller than the dimension in the second direction Y, the dimension that the first reinforcing portion 1132a extends along the second direction Y can be smaller. And because the second reinforcing portion 1132b is arranged on the side of the battery cell 30 along the third direction Z and extends along the second direction Y, the interval distance between the two second reinforcing portions 1132b on the opposite sides of the same second wall 313 can be larger.

[0150] Therefore, with such a setting, the distance that the first reinforcing portion 1132a extends along the third direction Z can be reduced, and it is convenient to increase the distance between the two second reinforcing portions 1132b on the side of the same second wall 313 along the third direction Z, so as to reduce the distance that the second reinforcing portion 1132b extends along the second direction Y. In this way, it is further convenient for the processing of the reinforcing portion 1132, which is beneficial to reducing the process difficulty of the first wall 113.

[0151] In some embodiments, the first reinforcing portions 1132a are provided on both sides of any battery cell 30 along the second direction Y, and / or the second reinforcing portions 1132b are provided on both sides of any battery cell 30 along the third direction Z.

[0152] In this way, the first reinforcing portions 1132a are provided on both sides of any battery cell 30 along the second direction Y, or the second reinforcing portions 1132b are provided on both sides of any battery cell 30 along the third direction Z. In this way, at least two sides of any battery cell 30 are provided with the reinforcing portion 1132, which is beneficial to improving the torsional stiffness of the battery cell 30 in the battery device 10, and further improving the overall structural stiffness of the battery device 10, and is further beneficial to improving the resonance frequency of the battery device 10.

[0153] In a second aspect, an electrical device according to an embodiment of the present application includes the battery device 10 provided in any of the above embodiments, and the battery device 10 is used to provide electrical energy.

[0154] For the electrical device provided in this embodiment itself, since it adopts the battery device 10 provided in any of the above embodiments, it has the same technical effects, which will not be elaborated here.

[0155] In some embodiments, as Figures 5 to 11 shown, the battery device 10 includes a box body 11, battery cells 30, and an adhesive layer 40. The box body 11 includes a box main body 111 and a cover body 112. The cover body 112 is covered on the box main body 111 along the first direction X. The dimension of the cover body 112 along the first direction X is smaller than the dimension of the box main body 111 along the first direction X. The cover body 112 includes a first wall 113. The first wall 113 includes glass fiber. The first wall 113 includes a wall main body 1131 and a reinforcing portion 1132. The wall main body 1131 and the reinforcing portion 1132 are integrally formed. The elastic modulus E of the reinforcing portion 1132 satisfies: E≥1500 MPa. The battery cells 30 are accommodated in the box body 11. The outer shell 31 of the battery cells 30 includes a second wall 313. The second wall 313 intersects with the wall main body 1131. At least part of the reinforcing portion 1132 is disposed opposite to the second wall 313. The adhesive layer 40 adhesively connects the second wall 313 and the reinforcing portion 1132. The reinforcing portion 1132 includes a first reinforcing portion 1132a and a second reinforcing portion 1132b. The first reinforcing portion 1132a is disposed on the side of the battery cells 30 along the second direction Y. The second reinforcing portion 1132b is disposed on the side of the battery cells 30 along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. The first reinforcing portion 1132a extends along the third direction Z. The second reinforcing portion 1132b is connected to at least one side of the first reinforcing portion 1132a along the second direction Y facing the battery cells 30. The second reinforcing portions 1132b on the side of the same second wall 313 along the third direction Z are spaced apart. The dimension of the outer shell 31 along the third direction Z is smaller than the dimension along the second direction Y. The first reinforcing portions 1132a are provided on both sides of any battery cell 30 along the second direction Y. The second reinforcing portions 1132b are provided on both sides of any battery cell 30 along the third direction Z.

[0156] For the battery device 10 provided by the embodiments of the present application, by providing that the first wall 113 of the box body 11 includes the reinforcing portion 1132 and providing that at least part of the reinforcing portion 1132 is disposed on the side of the battery cells 30 facing the second wall 313, it is beneficial to improve the overall structural stiffness of the battery device 10, thereby increasing the resonance frequency of the battery device 10 and reducing the risk of resonance of the battery device 10 during the process of external load. In this way, it is beneficial to reduce the risk of damage to the battery device 10 due to resonance and improve the reliable performance of the battery device 10.

[0157] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body, the box body comprises a box body and a cover body, the cover body is covered on the box body along a first direction, the cover body comprises a first wall, and the first wall comprises a wall body and a reinforcement part; A battery cell is accommodated in the box body, the outer shell of the battery cell includes a second wall, the second wall intersects with the wall body, the reinforcement portion extends toward the battery cell relative to the wall body, and at least a portion of the reinforcement portion is arranged on the side of the battery cell facing the second wall.

2. The battery device according to claim 1, characterized in that: The wall body and the reinforcement portion are integrally formed.

3. The battery device according to claim 1, characterized in that: The battery device further includes an adhesive layer, and the adhesive layer adhesively connects the reinforcement portion and the second wall of the battery cell.

4. The battery device according to claim 1, characterized in that: The size of the cover along the first direction is smaller than the size of the box body along the first direction.

5. The battery device according to claim 1, characterized in that: The first wall comprises fiberglass.

6. The battery device according to claim 1, characterized in that: The elastic modulus E of the reinforcement portion satisfies: E≥1500MPa.

7. The battery device according to any one of claims 1 to 6, characterized in that: The first wall includes a plurality of reinforcing parts, the reinforcing parts are extended along a first direction relative to the wall body, the plurality of reinforcing parts are extended along a second direction and are spaced apart along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The battery device includes a plurality of battery cells, the plurality of battery cells are arranged in an array along the second direction and the third direction, and any one of the reinforcing portions is disposed on a side of the plurality of battery cells along the third direction.

8. The battery device according to claim 7, characterized in that: The reinforcing parts are provided on both sides of any battery cell along the third direction.

9. The battery device according to any one of claims 1 to 6, characterized in that: The reinforcing portion is extended along a first direction relative to the wall body, and includes a first reinforcing portion and a second reinforcing portion. The first reinforcing portion is arranged on the side of the battery cell along the second direction, and the second reinforcing portion is arranged on the side of the battery cell along the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

10. The battery device according to claim 9, characterized in that: The first reinforcement portion extends along the third direction, the second reinforcement portion extends along the second direction, and the first reinforcement portion and the second reinforcement portion intersect.

11. The battery device according to claim 9, characterized in that: The first reinforcement portion extends along the third direction, the second reinforcement portion is connected to at least one side of the first reinforcement portion along the second direction toward the battery cell, and the second reinforcement portions are spaced apart from each other on the side of the second wall along the third direction.

12. The battery device according to claim 11, characterized in that: A dimension of the housing along the third direction is smaller than a dimension of the housing along the second direction.

13. The battery device according to claim 9, characterized in that: The first reinforcing parts are disposed on both sides of any battery cell along the second direction, and / or the second reinforcing parts are disposed on both sides of any battery cell along the third direction.

14. An electrical device, characterized in that: The battery device comprises a battery device as claimed in any one of claims 1 to 13, wherein the battery device is used to provide electrical energy.

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