Battery device and power-using device

Abstract

The present application discloses a battery device and an electric device. The battery device includes a battery box and a battery cell. The battery box is formed with a storage space, and the battery cell is arranged in the storage space; wherein, the battery box includes a cover body, the cover body includes a non-metallic outer layer, an electromagnetic shielding layer and an insulating layer, the insulating layer, the electromagnetic shielding layer and the non-metallic outer layer are stacked in sequence from the inside of the storage space to the outside of the storage space, and the insulating layer is located between the electromagnetic shielding layer and the battery cell, wherein, the battery box also includes a box body, the cover body is covered on the box body to form a storage space, the electromagnetic shielding layer covers the surface of the non-metallic outer layer facing the storage space, and the electromagnetic shielding layer includes an outer edge area extending along the circumference of the cover body, and the outer edge area is connected to the box body. In this way, the overall weight of the cover body can be reduced, and the lightweight of the cover body can be achieved. Through the electromagnetic shielding layer, the cover body can still have a high conductivity, realize the electromagnetic shielding function, and improve the influence of interference signals on the components inside the battery box.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to sustainable development, which has promoted the adjustment of energy structure and the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology, which has been widely used in portable electronics, electric vehicles and energy storage systems due to its high energy density, good cycle capacity, high operating voltage, environmental protection and low self-discharge.

[0003] The battery includes a battery box and battery cells located inside the battery box. The cover of the battery box is usually made of metal. However, the metal cover is heavy and has poor rigidity. The contour size is difficult to control and there is a risk of anisotropy and dimensional deviation. Utility Model Content

[0004] The main purpose of the present application is to provide a battery device and an electrical device, aiming to solve the above-mentioned technical problems existing in the prior art.

[0005] In order to solve the above problems, the present application provides a battery device, which includes a battery box and a battery cell, wherein the battery box forms a storage space, and the battery cell is arranged in the storage space; wherein the battery box includes a cover body, and the cover body includes a non-metallic outer layer, an electromagnetic shielding layer and an insulating layer, wherein the insulating layer, the electromagnetic shielding layer and the non-metallic outer layer are stacked in sequence from the inside of the storage space to the outside of the storage space, and the insulating layer is located between the electromagnetic shielding layer and the battery cell. wherein the battery box also includes a box body, and the cover body is covered on the box body to form the storage space, and the electromagnetic shielding layer covers the surface of the non-metallic outer layer facing the storage space, and the electromagnetic shielding layer includes an outer edge area extending along the circumference of the cover body, and the outer edge area is connected to the box body.

[0006] Thus, the cover includes a non-metallic outer layer, an electromagnetic shielding layer and an insulating layer. The non-metallic outer layer serves as the outer carrier of the cover, which can reduce the overall weight of the cover and achieve lightweighting of the cover. The electromagnetic shielding layer can make the cover still have a high electrical conductivity, achieve the electromagnetic shielding function, and improve the influence of interference signals on the components inside the battery box. At the same time, the insulating layer is located between the electromagnetic shielding layer and the battery cell, and the insulating layer can improve the electrical conduction between the battery cell and the electromagnetic shielding layer, thereby reducing the risk of short circuit between the battery cell and the electromagnetic shielding layer. In addition, the outer edge area of ​​the electromagnetic shielding layer is connected to the box, and the electromagnetic shielding layer covers the surface of the non-metallic outer layer facing the accommodating space. The electromagnetic shielding layer and the box can cooperate to make the accommodating space have a high electromagnetic shielding characteristic, thereby enhancing the electromagnetic shielding function of the battery box.

[0007] In some embodiments, the box body includes a support end surface extending along the circumference of the cover body, and the support end surface is conductively connected to the outer edge region. Thus, the support end surface and the outer edge region are conductively connected, so that the electromagnetic shielding layer can be directly electrically connected to the box body with the same potential, thereby realizing the electromagnetic shielding function of the battery box.

[0008] In some embodiments, the battery box includes a plurality of conductive locking members, which are arranged at intervals along the circumference of the cover body, and each conductive locking member is inserted through the outer edge region, the non-metallic outer layer covered by the outer edge region, and the supporting end surface. Thus, by inserting the conductive locking members through the outer edge region, the non-metallic outer layer covered by the outer edge region, and the supporting end surface, the cover body and the box body can be fixed by the conductive locking members, and at the same time, the electromagnetic shielding layer can be directly electrically connected to the box body at the same potential by the conductive locking members, thereby realizing the electromagnetic shielding function of the battery box.

[0009] In some embodiments, the electromagnetic shielding layer includes an end face region, the outer edge region surrounds the end face region, and the insulating layer covers the end face region. Thus, the insulating layer covers the end face region, so that the insulating layer and the outer edge region can be avoided, and on the basis of improving the electrical conduction between the battery cell and the electromagnetic shielding layer through the insulating layer, the influence of the insulating layer on the electromagnetic shielding characteristics of the battery box can be reduced.

[0010] In some embodiments, the outer edge region is closer to the box body than the end face region, and the electromagnetic shielding layer further includes a connection region, the connection region extends along the circumference of the cover body, and the connection region connects the end face region and the outer edge region. Thus, the connection region connects the end face region and the outer edge region, and the distance between the outer edge region and the end face region can be increased through the connection region, thereby reducing the interference of the insulating layer on the electromagnetic shielding layer of the outer edge region, and the outer edge region is closer to the box body than the end face region, so that the size of the accommodation space can be larger and a larger number of battery cells can be accommodated.

[0011] In some embodiments, the conductivity of the electromagnetic shielding layer is between 10 s / m and 1000 s / m. Thus, the conductivity of the electromagnetic shielding layer is between 10 s / m and 1000 s / m, and the electromagnetic shielding function can be better achieved through the electromagnetic shielding layer with higher conductivity.

[0012] In some embodiments, the thickness of the electromagnetic shielding layer is between 0.004 mm and 0.5 mm. Thus, the thickness of the electromagnetic shielding layer is between 0.004 mm and 0.5 mm, which can achieve the electromagnetic shielding function while also contributing to the lightweight design of the cover.

[0013] In some embodiments, the thickness of the insulating layer is between 0.1 mm and 2 mm. Thus, the thickness of the insulating layer is between 0.1 mm and 2 mm, which can achieve the insulation function and also contribute to the lightweight design of the cover.

[0014] In some embodiments, the number of the battery cells is multiple, the multiple battery cells are located in the accommodating space, and the multiple battery cells are connected in series and / or in parallel. Thus, the performance of the battery device is improved by connecting the multiple battery cells in series and / or in parallel.

[0015] In order to solve the above problems, the present application provides an electrical device, which includes the battery device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application;

[0018] Figure 2 is a schematic structural diagram of a battery device according to one or more embodiments of the present application;

[0019] Figure 3 is based on Figure 2 A schematic diagram of the disassembled structure of the battery device shown;

[0020] Figure 4 is a schematic diagram of a cross-sectional structure of a cover body according to one or more embodiments of the present application;

[0021] Figure 5 yes Figure 2 The schematic diagram of the cross-section structure of the battery device along the AA direction is shown.

[0022] Figure numbers: vehicle 1; battery device 2; controller 3; motor 4; battery box 10; battery cell 20; cover 100; electromagnetic shielding layer 110; outer edge area 111; end surface area 112; connection area 113; insulating layer 120; non-metallic outer layer 130; box 200; support end surface 210; accommodating space 300; conductive locking member 400. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0025] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0029] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0031] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of battery application fields, its market demand is also constantly expanding.

[0032] Batteries mentioned in this field can be divided into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. Disposable batteries (PrimaryBattery) are also called "disposable" batteries and original batteries, because after they are exhausted, they can no longer be recharged and can only be discarded. Rechargeable batteries are also called secondary batteries (SecondaryBattery) or secondary batteries, storage batteries. The manufacturing materials and processes of rechargeable batteries are different from those of primary batteries. Its advantage is that it can be recycled many times after charging, and the output current load capacity of rechargeable batteries is higher than that of most disposable batteries. The common types of rechargeable batteries at present are: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lithium-ion batteries have the advantages of light weight, large capacity (the capacity is 1.5 to 2 times that of nickel-metal hydride batteries of the same weight), no memory effect, and have a very low self-discharge rate. Therefore, even though the price is relatively high, they are still widely used. Lithium-ion batteries are currently also widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have a larger output and charging current, and also have a longer service life, but the cost is higher.

[0033] The battery described in the embodiments of the present application refers to a rechargeable battery or a disposable battery. The embodiments disclosed in the present application will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate device to power the device.

[0034] The battery may include a battery box and a battery cell located inside the battery box. The cover of the battery box is often made of metal. However, the metal cover is heavy and has poor rigidity. The contour size is difficult to control, and there is a risk of anisotropy and dimensional deviation.

[0035] In order to solve the technical problems existing in the related technology, the cover of the battery box provided in the present application includes a non-metallic outer layer, an electromagnetic shielding layer and an insulating layer, so as to reduce the weight of the cover through the non-metallic outer layer, while also increasing the electromagnetic shielding function through the electromagnetic shielding layer, and reducing the risk of short circuit between the battery cell and the electromagnetic shielding layer through the insulating layer.

[0036] Specifically, the present application provides an electric device, which may include but is not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles and spacecraft, etc. Among them, the electric device may include a battery, and the electric device may provide electric energy through the battery to realize the corresponding function.

[0037] The present application also provides an electric vehicle, which may include a battery device.

[0038] Please refer to Figure 1 , Figure 1 is a schematic diagram of the structure of a vehicle according to one or more embodiments of the present application.

[0039] The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery device 2 is provided inside the vehicle 1, and the battery device 2 may be provided at the bottom, head or tail of the vehicle 1. The battery device 2 may be used to power the vehicle 1, for example, the battery device 2 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 3 and a motor 4, and the controller 3 is used to control the battery device 2 to power the motor 4, for example, for starting, navigating and driving the vehicle 1.

[0040] In some embodiments of the present application, the battery device 2 can not only serve as an operating power source for the vehicle 1 , but also serve as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0041] In order to improve the performance of the electrical device, the present application also provides a battery device, see Figures 2 to 5 , Figure 2 is a schematic structural diagram of a battery device according to one or more embodiments of the present application, Figure 3 is based on Figure 2 The disassembled structure diagram of the battery device shown in FIG. Figure 4 is a schematic diagram of a cross-sectional structure of a cover body according to one or more embodiments of the present application; Figure 5 yes Figure 2 The schematic diagram of the cross-section structure of the battery device along the AA direction is shown.

[0042] The battery device includes a battery box 10 and a battery cell 20. The battery box 10 forms a accommodating space 300, and the battery cell 20 is arranged in the accommodating space 300; wherein, the battery box 10 includes a cover body 100, and the cover body 100 includes a non-metallic outer layer 130, an electromagnetic shielding layer 110 and an insulating layer 120. The insulating layer 120, the electromagnetic shielding layer 110 and the non-metallic outer layer 130 are stacked in sequence from the inside of the accommodating space 300 to the outside of the accommodating space 300, and the insulating layer 120 is located between the electromagnetic shielding layer 110 and the battery cell 20.

[0043] The battery cell 20 refers to the smallest unit that constitutes the battery device. The battery cell 20 may include a shell, an electrode assembly, and other functional components. The shell includes an end cap and a shell. The end cap refers to a component that covers the opening of the shell to isolate the internal environment of the battery cell 20 from the external environment. The end cap can be made of a material with a certain hardness and strength (such as aluminum alloy). The end cap is not easy to deform when it is squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals can be provided on the end cap. The electrode terminal can be used to electrically connect with the electrode assembly for outputting or inputting electrical energy of the battery cell 20. The electrode terminal can include a pole, and the pole can include a positive pole and a negative pole for outputting current and connecting with an external circuit. The end cap can also be provided with an explosion-proof part for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The shell is a component used to cooperate with the end cap to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte, and other components. The shell and the end cap may be independent components, and an opening may be provided on the shell, and the internal environment of the battery cell 20 may be formed by covering the opening with the end cap at the opening. Without limitation, the end cap and the shell may be integrated, specifically, the end cap and the shell may form a common connection surface before other components are put into the shell, and when the interior of the shell needs to be encapsulated, the end cap is covered with the shell. The shell may be made of a variety of materials, such as materials including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The electrode assembly is a component in the battery cell 20 where an electrochemical reaction occurs. One or more electrode assemblies may be included in the shell. The electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The part of the positive electrode sheet and the negative electrode sheet with active material constitutes the main body of the electrode assembly, and the part of the positive electrode sheet and the negative electrode sheet without active material each constitutes a pole ear. The positive pole ear and the negative pole ear may be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0044] The battery box 10 may have a storage space 300 for accommodating the battery cell 20 formed inside, and the storage space 300 may be in the form of a sealed cavity. The battery box 10 may adopt a variety of structural forms, for example, the battery box 10 may include a first part and a second part, the first part and the second part cover each other, and the first part and the second part jointly define a storage space for accommodating the battery cell 20. The second part may be a hollow structure with one end open, and the first part may be a plate-like structure, and the first part covers the open side of the second part, so that the first part and the second part jointly define a storage space; the first part and the second part may also be hollow structures with one side open, and the open side of the first part covers the open side of the second part 22. In this embodiment, the cover 100 may be understood as the first part or the second part of the above-mentioned battery box 10. The cover 100 includes a non-metallic outer layer 130, an electromagnetic shielding layer 110 and an insulating layer 120, and the non-metallic outer layer 130 may include but is not limited to composite materials, polypropylene (PP), polyamide (PA), and polyphenylene oxide (PPE). The conductivity of the non-metallic outer layer 130 may be less than 10 s / m, and the non-metallic outer layer 130 is lighter than the metal outer layer. The material of the electromagnetic shielding layer 110 may include but is not limited to metal materials or other composite materials with high electrical conductivity. For example, the electromagnetic shielding layer 110 may include but is not limited to metal foils or metal plates such as aluminum foil and copper foil. The material of the insulating layer 120 may include but is not limited to polypropylene (PP), polyimide (PI), polyethylene terephthalate (PET) or polycarbonate (PC).

[0045] The insulating layer 120, the electromagnetic shielding layer 110 and the non-metallic outer layer 130 are stacked in sequence from the inside of the accommodating space 300 to the outside of the accommodating space 300, and the insulating layer 120 is located between the electromagnetic shielding layer 110 and the battery cell 20. That is, the non-metallic outer layer 130 is the outermost structure of the cover 100, and the electromagnetic shielding layer 110 is attached to the surface of the non-metallic outer layer 130 facing the accommodating space 300, thereby increasing the electromagnetic shielding effect of the non-metallic outer layer 130 through the electromagnetic shielding layer 110. When the battery box 10 has functional modules such as a sampling module and a battery management system inside, the electromagnetic shielding layer 110 can be used to improve the influence of interference signals on it. The insulating layer 120 can be attached to the surface of the electromagnetic shielding layer 110 facing the accommodating space 300, and the insulating layer 120 is located between the electromagnetic shielding layer 110 and the battery cell 20, that is, the electromagnetic shielding layer 110 and the battery cell 20 are separated by the insulating layer 120, thereby achieving the purpose of electrical insulation between the electromagnetic shielding layer 110 and the battery cell 20.

[0046] Through the above-mentioned embodiment, the cover body 100 includes a non-metallic outer layer 130, an electromagnetic shielding layer 110 and an insulating layer 120. The non-metallic outer layer 130 serves as the outer carrier of the cover body 100, which can reduce the overall weight of the cover body 100 and achieve lightweight cover body 100. The electromagnetic shielding layer 110 can ensure that the cover body 100 still has a high electrical conductivity, thereby achieving electromagnetic shielding function and improving the influence of interference signals on components inside the battery box 10. At the same time, the insulating layer 120 is located between the electromagnetic shielding layer 110 and the battery cell 20. The insulating layer 120 can improve the electrical conductivity between the battery cell 20 and the electromagnetic shielding layer 110 and reduce the risk of short circuit between the battery cell 20 and the electromagnetic shielding layer 110.

[0047] Further, the battery box 10 also includes a box body 200, the cover body 100 is covered on the box body 200 to form a receiving space 300, the electromagnetic shielding layer 110 covers the surface of the non-metallic outer layer 130 facing the receiving space 300, and the electromagnetic shielding layer 110 includes an outer edge area 111 extending along the circumference of the cover body 100, and the outer edge area 111 is connected to the box body 200. The box body 200 can be formed with a receiving groove, and the cover body 100 is covered at the opening of the receiving groove, thereby sealing the receiving groove to form the receiving space 300. The box body 200 mainly includes a metal material, which can improve the structural strength of the box body 200 and the electromagnetic shielding characteristics of the box body 200. The electromagnetic shielding layer 110 covers the surface of the non-metallic outer layer 130 facing the receiving space 300, and the electromagnetic shielding effect of the receiving space 300 can be better through the cooperation of the electromagnetic shielding layer 110 and the box body 200. The outer edge region 111 may be annular, for example, the outer edge region 111 may be a square ring, a circular ring, or other polygonal rings, etc. The outer edge region 111 is connected to the case 200, so that the cover 100 can form an equipotential contact with the case 200 through the outer edge region 111, and the opening of the case 200 can be blocked by the middle part of the cover 100 to form a closed accommodation space 300. Thus, the outer edge region 111 of the electromagnetic shielding layer 110 is connected to the case 200, and the electromagnetic shielding layer 110 covers the surface of the non-metallic outer layer 130 facing the accommodation space 300, and the electromagnetic shielding layer 110 and the case 200 cooperate to make the accommodation space 300 have a higher electromagnetic shielding characteristic, thereby enhancing the electromagnetic shielding function of the battery box 10.

[0048] Further, the box body 200 includes a support end face 210 extending along the circumference of the cover body 100, and the support end face 210 is conductively connected to the outer edge region 111. The box body 200 may include a bottom wall portion and a side wall portion, the side wall portion is arranged on the bottom wall portion, the side wall portion may be cylindrical, and the side wall portion and the bottom wall portion may cooperate to form a receiving groove of the box body 200. The support end face 210 may be understood as a side surface of the side wall portion away from the bottom wall portion, the support end face 210 may be annular, and the shape and size of the support end face 210 may match the shape and size of the outer edge region 111, so that the support end face 210 and the outer edge region 111 correspond. The conductive connection between the support end face 210 and the outer edge region 111 may include but is not limited to direct contact between the support end face 210 and the outer edge region 111, and electrical connection between the support end face 210 and the outer edge region 111 through other conductive components. Thus, the support end surface 210 and the outer edge region 111 are conductively connected, so that the electromagnetic shielding layer 110 can be directly electrically connected to the box body 200 at the same potential, thereby realizing the electromagnetic shielding function of the battery box 10.

[0049] Furthermore, the battery box 10 includes a plurality of conductive locking members 400, which are arranged at intervals along the circumference of the cover body 100, and each conductive locking member 400 is penetrated through the outer edge region 111, the non-metallic outer layer 130 covered by the outer edge region 111, and the supporting end surface 210. The conductive locking member 400 can be a metal bolt, a metal screw, or the like having a conductive function and a fastening function. The number of the conductive locking members 400 can be set according to actual conditions. In some embodiments, the cover 100 can be first placed on the box 200, and the portion of the cover 100 corresponding to the outer edge region 111 corresponds to the support end face 210 of the box 200. Then, each conductive locking member 400 is passed through the outer edge region 111, the non-metallic outer layer 130 covered by the outer edge region 111, and the support end face 210 at its respective position, so as to fix the cover 100 and the box 200. Thus, the cover 100 and the box 200 can be fixed by the conductive locking members 400, and the electromagnetic shielding layer 110 can be directly electrically connected to the box 200 with the same potential by the conductive locking members 400, so as to realize the electromagnetic shielding function of the battery box 10. In some other embodiments, a sealing member can be clamped between two adjacent conductive locking members 400, so as to increase the sealing effect of the battery box 10.

[0050] In some embodiments, the electromagnetic shielding layer 110 includes an end face region 112, an outer edge region 111 surrounds the end face region 112, and an insulating layer 120 covers the end face region 112. The end face region 112 can be understood as the middle region of the electromagnetic shielding layer 110, the outer edge region 111 can surround the entire end face region 112, the outer edge region 111 can be directly connected to the end face region 112, or the outer edge region 111 and the end face region 112 can be indirectly connected through other regions, and the insulating layer 120 covers the end face region 112, so that the insulating layer 120 and the outer edge region 111 can form an avoidance, which can improve the electrical conduction between the battery cell 20 and the electromagnetic shielding layer 110 through the insulating layer 120, and can also reduce the influence of the insulating layer 120 on the electromagnetic shielding characteristics of the battery box 10.

[0051] Furthermore, the outer edge region 111 is closer to the box body 200 than the end face region 112, and the electromagnetic shielding layer 110 further includes a connection region 113, which extends along the circumference of the cover body 100, and the connection region 113 connects the end face region 112 and the outer edge region 111. The connection region 113 can be arranged around the end face region 112, and the outer edge region 111 can be arranged around the connection region 113, so that the connection region 113 is located between the outer edge region 111 and the end face region 112. The shape of the connection region 113 can be a plane shape or a curved shape, for example Figure 5 As shown, the connection area 113 may include a middle part and two bent parts, the two bent parts are connected to both sides of the middle part, the two bent parts have opposite protrusion directions, the bent part connecting the end surface part protrudes toward the outside of the accommodation space 300, and the bent part connecting the outer edge area 111 protrudes toward the inside of the accommodation space 300. In this embodiment, the connection area 113 connects the end surface area 112 and the outer edge area 111, and the distance between the outer edge area 111 and the end surface area 112 can be increased through the connection area 113, reducing the interference of the insulating layer 120 on the electromagnetic shielding layer 110 of the outer edge area 111, and the outer edge area 111 is closer to the box body 200 than the end surface area 112, so that the size of the accommodation space 300 can be larger and a larger number of battery cells 20 can be accommodated.

[0052] In some embodiments, the conductivity of the electromagnetic shielding layer 110 is between 10 s / m and 1000 s / m. Specifically, the conductivity of the electromagnetic shielding layer 110 can be 10 s / m, 100 s / m, 200 s / m, 300 s / m, 400 s / m, 500 s / m, 600 s / m or 700 s / m. The conductivity of the electromagnetic shielding layer 110 can also be between 100s / m and 1000s / m, the conductivity of the electromagnetic shielding layer 110 can be between 200s / m and 800s / m, the conductivity of the electromagnetic shielding layer 110 can be between 300s / m and 700s / m, the conductivity of the electromagnetic shielding layer 110 can be between 400s / m and 600s / m, the conductivity of the electromagnetic shielding layer 110 can be between 450s / m and 550s / m, or the conductivity of the electromagnetic shielding layer 110 can be between 10s / m and 500s / m, etc., so that by setting the electromagnetic shielding layer 110 with a higher conductivity, the electromagnetic shielding function can be better achieved.

[0053] In some embodiments, the thickness of the electromagnetic shielding layer 110 is between 0.004 mm and 0.5 mm. Specifically, the thickness of the electromagnetic shielding layer 110 can be 0.004 mm, 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.45 mm or 0.5 mm, etc. The thickness of the electromagnetic shielding layer 110 is between 0.004 mm and 0.4 mm, the thickness of the electromagnetic shielding layer 110 is between 0.05 mm and 0.5 mm, the thickness of the electromagnetic shielding layer 110 is between 0.1 mm and 0.4 mm, the thickness of the electromagnetic shielding layer 110 is between 0.2 mm and 0.5 mm, the thickness of the electromagnetic shielding layer 110 is between 0.2 mm and 0.4 mm, and the thickness of the electromagnetic shielding layer 110 is between 0.3 mm and 0.4 mm, so that it can achieve the electromagnetic shielding function while also contributing to the lightweight design of the cover 100.

[0054] In some embodiments, the thickness of the insulating layer 120 is between 0.1 mm and 2 mm. The thickness of the insulating layer 120 may be 0.1 mm, 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, 1.5 mm or 2 mm. The thickness of the insulating layer 120 is between 0.3 mm and 2 mm, the thickness of the insulating layer 120 is between 0.5 mm and 1.5 mm, the thickness of the insulating layer 120 is between 0.8 mm and 1.5 mm, the thickness of the insulating layer 120 is between 1 mm and 1.5 mm, the thickness of the insulating layer 120 is between 1 mm and 2 mm, and the thickness of the insulating layer 120 is between 1.5 mm and 2 mm, so that the insulating function can be achieved while also contributing to the lightweight design of the cover 100.

[0055] In some embodiments, there are multiple battery cells 20, and multiple battery cells 20 are located in the accommodating space 300, and multiple battery cells 20 are connected in series and / or in parallel. The number of battery cells 20 can be set according to actual conditions, and multiple battery cells 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 20 are both connected in series and in parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by multiple battery cells 20 is accommodated in the battery box 10. Multiple battery cells 20 can also be connected in series, in parallel, or in mixed connection to form a battery module, and multiple battery modules are then connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the battery box 10. The battery device may also include other structures. For example, the battery device may also include a busbar, a thermal management component, or a battery management system. The busbar is used to realize the electrical connection between multiple battery cells 20, the thermal management component is used to perform thermal management on multiple battery cells 20, and the battery management system can be used to communicate with external devices to control the charging and discharging of the battery device by receiving or sending signals.

[0056] To summarize, the cover body 100 includes a non-metallic outer layer 130, an electromagnetic shielding layer 110 and an insulating layer 120. The non-metallic outer layer 130 serves as the outer carrier of the cover body 100, which can reduce the overall weight of the cover body 100 and achieve lightweight cover body 100. The electromagnetic shielding layer 110 can ensure that the cover body 100 still has a high electrical conductivity, thereby achieving electromagnetic shielding function and improving the impact of interference signals on components inside the battery box 10. At the same time, the insulating layer 120 is located between the electromagnetic shielding layer 110 and the battery cell 20. The insulating layer 120 can improve the electrical conductivity between the battery cell 20 and the electromagnetic shielding layer 110 and reduce the risk of short circuit between the battery cell 20 and the electromagnetic shielding layer 110.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: A battery box is formed with a containing space; A battery cell is disposed in the accommodation space; The battery box includes a cover body, the cover body includes a non-metallic outer layer, an electromagnetic shielding layer and an insulating layer, the insulating layer, the electromagnetic shielding layer and the non-metallic outer layer are stacked in sequence from inside the accommodating space to outside the accommodating space, and the insulating layer is located between the electromagnetic shielding layer and the battery cell; Among them, the battery box also includes a box body, the cover body is covered on the box body to form the accommodating space, the electromagnetic shielding layer covers the surface of the non-metallic outer layer facing the accommodating space, the electromagnetic shielding layer includes an outer edge area extending along the circumference of the cover body, and the outer edge area is connected to the box body.

2. The battery device according to claim 1, characterized in that: The box body comprises a supporting end surface extending along the circumference of the cover body, and the supporting end surface is conductively connected to the outer edge region.

3. The battery device according to claim 2, characterized in that: The battery box includes a plurality of conductive locking members, which are arranged at intervals along the circumference of the cover body, and each of the conductive locking members penetrates the outer edge area, the non-metallic outer layer covered by the outer edge area, and the supporting end surface.

4. The battery device according to claim 1, characterized in that: The electromagnetic shielding layer includes an end surface region, the outer edge region surrounds the end surface region, and the insulating layer covers the end surface region.

5. The battery device according to claim 4, characterized in that: The outer edge region is closer to the box body than the end surface region. The electromagnetic shielding layer further includes a connection region, which extends along the circumference of the cover body and connects the end surface region and the outer edge region.

6. The battery device according to any one of claims 1 to 5, characterized in that: The conductivity of the electromagnetic shielding layer is between 10 s / m and 1000 s / m.

7. The battery device according to any one of claims 1 to 5, characterized in that: The thickness of the electromagnetic shielding layer is between 0.004 mm and 0.5 mm.

8. The battery device according to any one of claims 1 to 5, characterized in that: The thickness of the insulating layer is between 0.1 mm and 2 mm.

9. The battery device according to any one of claims 1 to 5, characterized in that: There are multiple battery cells, and the multiple battery cells are located in the accommodating space. The multiple battery cells are connected in series and / or in parallel.

10. An electrical device, characterized in that: The electrical device comprises the battery device as claimed in any one of claims 1 to 9.

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