Battery device and electric device

Abstract

The utility model belongs to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises a battery single body assembly and a box body, the box body comprises a box wall, the box wall comprises an insulating layer, a main body layer and a shielding layer which are sequentially arranged in a stacked mode, a containing cavity is defined by the main body layer, and the shielding layer is connected to the surface of the side, away from the containing cavity, of the main body layer; the shielding layer is made of a shielding material; the main body layer comprises a part of shielding material; and the battery monomer assembly is accommodated in the accommodating cavity. The box body provided by the utility model has shielding performance and can also realize light weight at the same time.

Description

Technical Field

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

[0002] In fields such as power batteries and energy storage batteries, battery devices serve as energy storage and output devices, and their shielding is crucial for equipment safety, performance stability, and electromagnetic compatibility. In related technologies, the shielding effect of battery devices is often unsatisfactory, thus affecting the overall performance of the battery device. Utility Model Content

[0003] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the technical problem of the large weight of the shielded housing in the battery device.

[0004] In a first aspect, this application provides a battery device, comprising:

[0005] Battery cell assembly;

[0006] The enclosure includes a wall, which comprises an insulating layer, a main body layer, and a shielding layer stacked sequentially. The main body layer forms a cavity, and the shielding layer is connected to the surface of the main body layer away from the cavity. The shielding layer is made of a shielding material. The main body layer includes a portion of the shielding material. The battery cell assembly is housed within the cavity.

[0007] In this embodiment, the battery device uses a modular, stacked structure for the housing. The main body layer forms the main part of the housing, and the shielding layer is made of shielding material, thereby giving the housing shielding performance. The insulating layer serves to insulate the battery cells from the individual components. By setting some shielding material in the main body layer, a three-dimensional shielding mesh is formed between the shielding layer and the main body layer, which improves the shielding effect of the battery device.

[0008] In one embodiment, the shielding material is a metal or graphene.

[0009] In this embodiment, the type of shielding material can be selected according to the specific application scenario. Metal materials have lower manufacturing costs, which helps to reduce the manufacturing cost of the enclosure; graphene materials are lighter, which helps to reduce the weight of the enclosure.

[0010] In one embodiment, the weight of the shielding material in the main body layer is less than 20% of the weight of the main body layer.

[0011] In this embodiment, by adding shielding material to the main body layer, the conductivity of the main body layer can be improved, which helps to enhance the overall electromagnetic shielding effectiveness of the enclosure, while not significantly increasing the weight and maintaining the lightweight characteristics of the enclosure.

[0012] In one embodiment, the material of the main layer is conductive plastic.

[0013] In this embodiment, the main body layer is made of conductive plastic, which is easy to obtain and has low cost. It is also easy to process and manufacture, which helps to reduce manufacturing costs.

[0014] In one embodiment, the thickness of the main body layer is greater than the thickness of the shielding layer.

[0015] In this embodiment, the thickness of the main body layer is greater than the thickness of the shielding layer, which can optimize the contradiction between the weight of the enclosure and the shielding function, so that the enclosure has sufficient rigidity and strength while also having a shielding function.

[0016] In one embodiment, the thickness of the main body layer is 2mm-4mm; and / or,

[0017] The thickness of the shielding layer is 0.1μm~5.0μm.

[0018] In this embodiment, a reasonable thickness is selected according to different enclosure functional requirements. While ensuring the enclosure's shielding performance and lightweight advantages, material waste and weight redundancy are reduced, which helps to reduce manufacturing costs.

[0019] In one embodiment, the shielding layer is electroplated or coated on the surface of the body layer.

[0020] In this embodiment, electroplating or coating can reduce the thickness of the shielding layer as much as possible, thereby further reducing the weight of the shielding layer and improving the lightweight effect of the enclosure.

[0021] In one embodiment, the enclosure wall further includes an insulating layer stacked on the surface of the main body layer facing the receiving cavity.

[0022] In this embodiment, by providing an insulating layer, the risk of short circuits between the main body layer and the battery cell assembly and other electrical components in the accommodating cavity can be reduced, thus providing insulation protection.

[0023] In one embodiment, the insulating layer is an insulating film, which is attached to the surface of the main body layer facing the accommodating cavity.

[0024] In this embodiment, the insulation layer is an insulating film, which makes the preparation of the box more convenient and helps to reduce manufacturing costs.

[0025] In one embodiment, the enclosure includes a first enclosure and a second enclosure, which are connected and together enclose a cavity; at least one of the enclosure walls of the first enclosure and the second enclosure includes an insulating layer, a main body layer and a shielding layer.

[0026] In this embodiment, depending on the structural form of the box, the box wall can be partially or completely layered, which helps to reasonably control the manufacturing cost of the box.

[0027] In one embodiment, the battery device further includes a first shield connected to a shielding layer; the housing wall has an assembly hole for inserting a connector, and the first shield is disposed in the assembly hole; the connector includes a contact, a housing, and a second shield, the housing is inserted into the assembly hole, the contact is connected to the housing and electrically connected to the battery cell assembly, and the second shield is connected to the housing and electrically connected to the first shield.

[0028] In this embodiment, by setting a first shield and a second shield, after the connector is inserted into the assembly hole of the housing, the first shield and the second shield come into contact, thereby connecting the grounding circuit of the connector to the shielding layer. The shielding grounding is achieved by relying on the shielding layer, making the shielding and grounding of the connector more convenient and ensuring the stability of signal transmission.

[0029] In one embodiment, the first shielding element is a shielding ring, which is nested in the assembly hole and contacts the shielding layer. The shielding ring is surrounded on the outer peripheral surface of the housing.

[0030] In this embodiment, by nesting the shielding ring inside the assembly hole, the connector can reliably contact the second shielding component after being inserted into the assembly hole. The structure is simple and the operation is more convenient.

[0031] In one embodiment, the housing has a locking position for connecting fasteners to confine the battery device within the electrical device; the battery device also includes a lead wire, one end of which is connected to a first shield, and the other end of which extends to the shield and is connected to the locking position.

[0032] In this embodiment, the guide wire enables the grounding structure of the first shielding component, the shielding layer of the box wall, and the electrical device to conduct, allowing electromagnetic waves to be efficiently guided into the ground and further enhancing the shielding effect. The guide wire extends to the locking position and shares fasteners, reducing the need for additional grounding nodes, simplifying the installation process, reducing assembly costs, and reducing the problem of increased grounding resistance caused by multiple nodes, thus ensuring stable grounding performance.

[0033] In one embodiment, the second shielding member is elastic to be able to expand and contract elastically, and the second shielding member can abut against the first shielding member structure by elastic expansion or contraction.

[0034] In this embodiment, the second shielding member can expand and contract elastically, thereby enabling a reliable connection between the second shielding member and the first shielding member and reducing the risk of poor contact between the second shielding member and the first shielding member.

[0035] In one embodiment, the second shield is movably connected to the housing, and the connector further includes an elastic element connected between the second shield and the housing so that the second shield can abut against the first shield.

[0036] In this embodiment, by providing an elastic element, the second shielding element can abut against the first shielding element under the action of elastic force, thereby enabling a reliable connection between the second shielding element and the first shielding element and reducing the risk of poor contact between the second shielding element and the first shielding element.

[0037] In one embodiment, the second shield is connected to the housing wall so that the second shield is confined within the assembly hole.

[0038] In this embodiment, by connecting the second shield to the housing, the second shield also has a locking and limiting function, thereby improving the reliability of the connection between the connector and the housing.

[0039] In one embodiment, the shielding ring is elastic to be able to contract and expand radially, and the inner ring wall of the shielding ring can abut against the second shielding member.

[0040] In this embodiment, by giving the shielding ring the ability to contract and expand, the shielding ring can exert a compressive force on the second shielding component when it comes into contact with the second shielding component, thereby improving the reliability of the connection between the shielding ring and the second shielding component and reducing the risk of poor contact.

[0041] Secondly, this application provides an electrical device, including a battery device as described in any of the above, the battery device being used to store or provide electrical energy.

[0042] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0045] Figure 2This is an exploded view of the battery device provided in some embodiments of this application;

[0046] Figure 3 A partial cross-sectional view in the thickness direction of the casing wall of a battery device provided in some embodiments of this application;

[0047] Figure 4 A three-dimensional structural diagram of the housing in a battery device provided in some embodiments of this application;

[0048] Figure 5 for Figure 4 Partial sectional view at the location of the assembly hole;

[0049] Figure 6 for Figure 5 Enlarged view of a portion of position A in the middle;

[0050] Figure 7 This is a front view of the housing in a battery device provided in some embodiments of this application;

[0051] Figure 8 for Figure 7 Partial sectional view of BB;

[0052] Figure 9 for Figure 8 Enlarged view of the middle C position Figure 1 ;

[0053] Figure 10 for Figure 8 Enlarged view of the middle C position Figure 2 ;

[0054] Figure 11 This is a schematic diagram of the connector structure in a battery device provided in some embodiments of this application;

[0055] Figure 12 This is a three-dimensional structural diagram of a battery device provided in some embodiments of this application.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1000, Vehicle; 1100, Battery assembly; 1110, Housing; 1111, First housing; 1112, Second housing; 1113, Housing wall; 1114, Main body layer; 1115, Shielding layer; 1116, Insulating layer; 1117, Assembly hole; 1118, Receiving cavity; 1120, Battery cell assembly; 1121, Battery cell; 1130, First shielding element; 1140, Connector; 1141, Housing; 1142, Second shielding element; 1143, Contact element; 1144, Elastic element; 1150, Guide wire; 1160, Locking position; 1200, Controller; 1300, Motor; X, First direction; Y, Second direction; Z, Third direction; L1, Thickness of shielding layer; L2, Thickness of main body layer; L3, Thickness of insulating layer. Detailed Implementation

[0058] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0060] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0061] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0063] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0064] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0065] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0066] With the rapid development of the new energy industry, battery technologies (such as lithium-ion batteries and sodium-ion batteries) are widely used in electric vehicles, energy storage systems and other fields due to their advantages such as high energy density and long cycle life.

[0067] In fields such as power batteries and energy storage batteries, battery devices serve as energy storage and output devices, and their shielding is crucial for equipment safety, performance stability, and electromagnetic compatibility. In related technologies, the shielding effect of battery devices is often unsatisfactory, thus affecting the overall performance of the battery device.

[0068] Therefore, this application provides a battery device in which the housing of the battery device adopts a combined layered structure, the main body layer forms the main body of the housing, the shielding layer is made of shielding material, thereby giving the housing shielding performance, and the insulating layer serves to insulate against the battery cell assembly; by setting a portion of the shielding material in the main body layer, a three-dimensional shielding mesh is formed between the shielding layer and the main body layer, thereby improving the shielding effect of the battery device.

[0069] Specifically, refer to Figure 2 As shown, this application embodiment provides a battery device 1100. The battery device 1100 disclosed in this application embodiment can be used in electrical devices that use the battery device 1100 as a power source or in various energy storage devices and energy storage systems that use the battery device 1100 as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric toys, power tools, electric vehicles, vehicles 1000, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0070] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0071] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0072] In some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0073] For ease of explanation, the following embodiments use a horizontally placed battery device 1100 as an example. The definition of direction can include vertical and horizontal directions, which are perpendicular. The vertical direction can be understood as the height direction of the housing 1110, and the horizontal direction can be understood as the length or width direction of the housing 1110. Therefore, the lower part of the housing 1110 can be understood as the bottom of the housing 1110. The first direction X and the second direction Y mentioned below are two perpendicular horizontal directions in the horizontal plane, and the third direction Z is a vertical direction perpendicular to the first direction X and the second direction Y.

[0074] According to some embodiments of this application, refer to Figure 2 and Figure 3 As shown, this application embodiment provides a battery device 1100, which includes a battery cell assembly 1120 and a housing 1110. The housing 1110 includes a housing wall 1113, which includes an insulating layer 1116, a main body layer 1114, and a shielding layer 1115 stacked sequentially. The main body layer 1114 surrounds a cavity 1118, and the shielding layer 1115 is connected to the surface of the main body layer 1114 away from the cavity 1118. The shielding layer 1115 is a shielding layer 1115 made of shielding material. The main body layer 1114 is a main body layer including a portion of the shielding material. The battery cell assembly 1120 is housed in the cavity 1118.

[0075] Specifically, please refer to Figure 2 As shown, Figure 2 This is an exploded structural diagram of a battery device 1100 provided in some embodiments of this application. The battery device 1100 includes a housing 1110 and one or more battery cell assemblies 1120. A receiving cavity is formed within the housing 1110, and the battery cell assemblies 1120 are housed within the receiving cavity. The battery cell assembly 1120 is typically formed by arranging multiple battery cells 1121. These multiple battery cells can be stacked in a first direction. Alternatively, for example, the battery cell assembly 1120 can also be a battery module. A battery module is formed by arranging and fixing multiple battery cells 1121 to form an independent module (i.e., a battery cell group). In each independent module, the multiple battery cells 1121 are stacked in the first direction X, and the multiple independent modules are sequentially arranged in the second direction Y, which is perpendicular to the first direction X. As an example, a battery module can be formed by binding multiple battery cells together with cable ties. The housing 1110 provides a receiving cavity for the battery cell assembly 1120, and the housing 1110 can adopt various structures.

[0076] A battery cell 1121 refers to the smallest unit that makes up the battery device 1100. Each battery cell 1121 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 1121 can be cylindrical, flat, cuboid, or other shapes.

[0077] Reference Figure 3 As shown, the housing 1110 is used to house the battery cell assembly 1120. The housing wall 1113 of the housing 1110 has a layered structure. Specifically, the housing wall 1113 includes an insulating layer 1116, a main body layer 1114, and a shielding layer 1115. The insulating layer 1116, the main body layer 1114, and the shielding layer 1115 are stacked sequentially. That is, the insulating layer 1116 and the shielding layer 1115 are on both sides of the main body layer 1114, respectively. The shielding layer 1115 is an exposed layer structure, and the insulating layer 1116 is the inner surface layer of the housing wall 1113. The main body layer 1114 is the main part of the main support system forming the housing 1110 and the housing wall 1113. For example, the main body layer 1114 can be made of a plate structure with a preset thickness. The main body layer 1114 surrounds and forms the housing cavity 1118 for housing the battery cell assembly 1120.

[0078] The shielding layer 1115 needs to have a shielding function. Shielding refers to the metallic isolation between the accommodating cavity 1118 and the space outside the accommodating cavity 1118, thereby controlling the induction and radiation of electric fields, magnetic fields, and electromagnetic waves in the area of ​​the accommodating cavity 1118. For example, the shielding layer 1115 can be used to surround the battery cell assembly 1120, electronic components, receiving circuits, etc. located inside the housing 1110, to reduce the probability of being affected by external electromagnetic fields.

[0079] The shielding layer 1115 can be considered a shielding cover made of shielding materials, which may include metallic materials, graphene materials, etc. Furthermore, with technological advancements, the gradual application of conductive polymer composite materials, flexible tin-based materials, and nano-carbon powders has led to some materials achieving a shielding effectiveness of 60dB in the 30-1000MHz frequency band. Additionally, lightweight electromagnetic shielding materials are prepared using polymer-expanded microspheres combined with graphene or carbon nanotubes; these materials also fall within the scope of the shielding materials described in this application. Taking the use of a metallic material for the shielding layer 1115 as an example, the shielding layer 1115 can utilize low-resistivity metallic materials such as copper or aluminum. When the frequency of the interfering electromagnetic field is high, the eddy currents generated in the material of the shielding layer 1115 can cancel out the external electromagnetic waves, thereby achieving a shielding effect. Furthermore, the shielding layer 1115 also has the functions of absorbing energy (eddy current loss), reflecting energy (electromagnetic waves reflected at the shielding interface), and canceling energy (electromagnetic induction causes the shielding layer 1115 to generate a reverse electromagnetic field, canceling out some of the interfering electromagnetic waves), thereby reducing interference. It should be noted that in the battery device 1100, the shielding layer 1115 needs to be grounded to provide shielding. For example, in a vehicle, the shielding layer 1115 will be grounded to the vehicle frame of the vehicle 1000.

[0080] It is evident that the shielding layer 1115 enables the housing 1110 and housing wall 1113 to have a certain shielding function. However, if only the shielding layer 1115 is used and the main body layer 1114 is made entirely of plastic material without shielding function, the shielding layer 1115 may form "conductive breaks" due to processing gaps (such as welding joints or splices) or surface oxidation. This can cause electromagnetic radiation to penetrate through the breaks, resulting in shielding failure. The electromagnetic interference can affect the normal operation of the battery cells and electronic components inside the housing, thereby affecting the performance of the battery device.

[0081] Therefore, in this application, the main body layer 1114 contains shielding material, but the content of shielding material should not be too large. If it is too large, it may increase the weight of the enclosure 1110 (for example, the shielding material is made of metal), or it may increase the manufacturing cost (for example, the shielding material is made of graphene). The main body layer 1114 contains a portion of shielding material, so that the shielding material in the main body layer 1114 and the shielding material in the shielding layer 1115 can form a "three-dimensional conductive network" that runs through the enclosure wall 1113 through physical contact or interfacial charge transfer, so as to achieve the effect of enhanced shielding.

[0082] Understandably, the materials in the main body layer 1114 other than the shielding material are non-shielding materials. Since the main body layer 1114 is the main part of the enclosure wall 1113, the overall weight of the enclosure 1110 can be reduced by reducing the weight of the main body layer 1114. Therefore, in order to reduce the weight of the main body layer 1114, a lightweight material can be used. For example, the main body layer 1114 is made of a first material and a shielding material. The mass density of the first material should be less than that of the metal material to achieve the effect of weight reduction. In one specific embodiment, the shielding layer 1115 is made of a metallic material, while the main body layer 1114 is made of a polymer material and a shielding material. The content of the shielding material can be less than 50%, and the mass density of the polymer material is less than that of the metallic material. This can also be understood as the main body layer 1114 using a lightweight material containing a small amount of shielding material. This lightweight material is at least lighter than the metallic material, meaning that the mass density of the main body layer 1114 should be less than that of the metallic material. The reduced mass density of the main body layer 1114 reduces the mass (or weight) of the main body layer 1114, thereby achieving a lightweight effect for the housing 1110.

[0083] In addition, when the shielding layer 1115 is made of metal material, the metal material can be copper, aluminum, copper alloy or aluminum alloy, etc. An excessively thick shielding layer 1115 will also increase the weight of the enclosure 1110. Therefore, the thickness L1 of the shielding layer can be reduced as much as possible. For example, the shielding layer 1115 can be a coating or film.

[0084] The shielding layer 1115 and the main body layer 1114 can be stacked together by external equipment through pressing; an adhesive can be provided between the shielding layer 1115 and the main body layer 1114, so that the shielding layer 1115 and the main body layer 1114 can also be connected by adhesive.

[0085] Since the main body layer 1114 encloses and forms the accommodating cavity 1118, it can be understood that the main body layer 1114 has an inner surface and an outer surface. The inner surface is connected to the insulating layer 1116, and the outer surface should be understood as the surface of the main body layer 1114 that is away from or opposite to the inner surface. The shielding layer 1115 is connected to or covers the outer surface of the main body layer 1114, so that the shielding layer 1115 forms a wrap around the structural layer on the outside or periphery, thereby shielding and protecting the battery cell assembly 1120 and other electronic components in the accommodating cavity 1118, preventing or attenuating the transmission channel of electromagnetic interference energy into the housing 1110, thereby achieving the effect of suppressing electromagnetic interference.

[0086] In this application, the "three-dimensional conductive network" constructed by the shielding material in the main body layer 1114 and the shielding material in the shielding layer 1115 can reduce the probability of "conductive breakpoints" and improve electromagnetic reflection efficiency.

[0087] Specifically, if relying solely on a single shielding layer 1115, the metal material may form "conductive breaks" due to processing gaps (such as welding joints or splices) or surface oxidation, causing electromagnetic radiation to penetrate from the breaks. However, the shielding material (e.g., metal material) in the main body layer 1114 can fill the microscopic gaps in the shielding layer 1115, making the entire enclosure wall 1113 a "conductive whole" without obvious breaks.

[0088] When external electromagnetic radiation (such as radio frequency waves) comes into contact with the box wall 1113, the "three-dimensional conductive network" can quickly generate an induced current. According to the "electromagnetic reflection law", the reverse magnetic field generated by the induced current will cancel out the incident magnetic field, greatly reducing the penetration rate of electromagnetic radiation.

[0089] In addition, the "three-dimensional conductive network" constructed by the shielding material in the main body layer 1114 and the shielding material in the shielding layer 1115 can extend the "electromagnetic absorption path" and enhance energy loss.

[0090] Specifically, taking the use of metal materials as the shielding material as an example, the metal particles (such as nickel powder and iron powder) in the main body layer 1114 have high magnetic permeability. When electromagnetic radiation penetrates the shielding layer 1115 and enters the main body layer 1114, the metal particles will convert electromagnetic energy into their own eddy current loss and hysteresis loss. On the one hand, electromagnetic radiation induces eddy currents on the surface of the metal particles, and the eddy currents are converted into heat energy in the conductive medium due to the resistance effect. On the other hand, the alternating magnetic field will cause the magnetic domains of the metal particles to flip repeatedly, generating hysteresis loss, which further consumes electromagnetic energy.

[0091] Because the shielding materials of the main body layer 1114 and the shielding layer 1115 form a "continuous conductive path", the propagation path of electromagnetic radiation in the box wall 1113 will change from a "planar path of a single shielding layer 1115" to a "three-dimensional meandering path of shielding layer 1115-main body layer 1114-shielding layer 1115", with the path length extended by 2-3 times. The electromagnetic energy is gradually consumed in the process of multiple reflections and absorptions, and the intensity of electromagnetic radiation penetrating the box 1110 can be reduced to 1 / 5-1 / 10 of that of a single shielding layer 1115.

[0092] Furthermore, taking a metal material as an example, when the metal material in the main body layer 1114 (such as silver-plated copper powder) comes into contact with the metal surface of the shielding layer 1115 (such as nickel-plated steel plate), if the two form an "ohmic contact", free electrons can flow freely between the metals without hindrance, ensuring rapid conduction of induced current.

[0093] When low-frequency electromagnetic radiation is incident, the shielding material (e.g., metal) in the high-permeability main layer 1114 attracts magnetic field lines, concentrating the magnetic field within the main layer 1114 and reducing diffusion into the housing 1110. Simultaneously, the highly conductive shielding material (e.g., metal) in the shielding layer 1115 induces eddy currents, generating a reverse magnetic field to counteract the incident magnetic field. Through their combined effect, the shielding effectiveness of low-frequency electromagnetic radiation can be increased from 20dB for a single shielding layer 1115 to 40-50dB for the composite structure (the higher the dB value, the better the shielding effect). The intermetallic interaction between the main layer 1114 and the shielding layer 1115 essentially addresses the shortcomings of a single metal shielding layer 1115 in terms of "conductivity continuity," "electromagnetic absorption capacity," and "long-term stability" through three dimensions: "three-dimensional conductive network construction," "interface synergistic effect optimization," and "complementary magnetoelectric properties." This synergistic effect not only significantly improves electromagnetic shielding effectiveness (especially the shielding capability covering both high and low frequencies), but also meets the personalized electromagnetic compatibility requirements of different scenarios (industrial, automotive, and communication) under the premise of lightweighting and cost control. This is one of the core technological advantages of the 1110 composite layered box structure.

[0094] The insulating layer 1116 serves as insulation, preventing electrical short circuits between the battery cell assembly 1120 and other components within the accommodating cavity 1118 and the main body layer 1114, thus providing protection. For example, when the main body layer 1114 contains metallic materials, the insulating layer 1116 ensures good insulation between the main body layer 1114 and the battery cell assembly 1120 and other electronic components, forming insulation protection.

[0095] The insulating layer 1116 and the main body layer 1114 can be integrally injection molded using a two-stage injection molding process. For example, the main body layer 1114, containing PP material and shielding material, and the insulating layer 1116, made of PET (polyethylene terephthalate), can be integrally injection molded to improve the stability of the connection between the main body layer 1114 and the insulating layer 1116. Alternatively, the insulating layer 1116 and the main body layer 1114 can also be connected by adhesive bonding. The thickness L3 of the insulating layer is less than the thickness L2 of the main body layer.

[0096] By setting the insulation layer 1116, the risk of short circuit between the main body layer 1114 and the battery cell assembly 1120 and other electrical components in the accommodating cavity 1118 can be reduced, thus playing a role in insulation protection.

[0097] In this embodiment, the housing 1110 of the battery device 1100 adopts a combined layered structure. The main body layer 1114 forms the main body of the housing 1110, and the shielding layer 1115 is made of shielding material, thereby giving the housing 1110 shielding performance. The insulating layer 1116 serves to insulate against the battery cell assembly 1120. By setting a portion of the shielding material in the main body layer 1114, a three-dimensional shielding mesh is formed between the shielding layer 1115 and the main body layer 1114, thereby improving the shielding effect of the battery device 1100.

[0098] In some embodiments, the shielding material is a metal or graphene.

[0099] Specifically, metal materials are low in cost and readily available, thus helping to reduce the manufacturing cost of the enclosure 1110. In addition, metal materials have excellent high-frequency electromagnetic radiation shielding capabilities, which helps to improve the shielding effect. Metal materials can be copper, aluminum, copper alloys, or aluminum alloys, etc.

[0100] Furthermore, metallic materials possess high mechanical strength and excellent impact resistance. For example, the tensile strength of metallic shielding layers (such as galvanized steel plates and aluminum alloys) is generally between 200-500 MPa, capable of withstanding collisions and compression during enclosure handling and installation without easily deforming or breaking. Moreover, the corrosion resistance of metallic materials is controllable, resulting in a long service life. Through surface treatments (such as galvanizing, nickel plating, and passivation), the metallic shielding layer (1115) can resist corrosive media such as moisture, salt, and chemical gases.

[0101] Graphene boasts advantages such as lightweight design, ultra-thinness, and high-frequency shielding. Its extremely low density significantly reduces enclosure weight. Graphene's excellent flexibility allows it to adapt to irregular structures; graphene films exhibit good flexibility, can be bent and folded without damaging the conductive network, and can tightly adhere to curved surfaces, gaps, and other irregular structures of the main layer. Furthermore, graphene possesses shielding capabilities for ultra-high frequency environments. Its shielding stability is high; as a single-atom-layer structure, all atoms participate in conductivity, eliminating the skin effect, and maintaining stable shielding effectiveness even at 100GHz. Additionally, graphene combines thermal conductivity with shielding functions, enhancing the enclosure's heat dissipation capacity while providing shielding.

[0102] In this embodiment, the type of shielding material can be selected according to the specific application scenario. Metal materials have lower manufacturing costs, which helps to reduce the manufacturing cost of the enclosure 1110; graphene materials are lighter, which helps to reduce the weight of the enclosure 1110.

[0103] In some embodiments, the weight of the shielding material in the main body layer 1114 is less than 20% of the weight of the main body layer 1114.

[0104] Specifically, since the main body layer 1114 needs to be lightweight, in addition to shielding materials, the main body layer 1114 may also include polymer materials. Polymer materials, also known as polymer matrix materials, are materials composed of polymer compounds as the matrix and other additives (auxiliaries).

[0105] Understandably, in this example, the mass density of the polymer material in the main body layer 1114 should be less than that of the metal material, making it a lightweight material and thus giving the main body layer 1114 a lightweight characteristic. Furthermore, since the main body layer 1114 serves as the main structure of the housing 1110 and the housing wall 1113, it needs to possess a certain strength and rigidity to at least provide housing and support for the battery cell assembly 1120.

[0106] Polymer materials can be categorized by their origin into natural polymers and synthetic polymers. Natural polymers are macromolecular substances found in animals, plants, and other organisms, and can be classified into natural fibers, natural resins, and natural rubber, among others. Synthetic polymers mainly refer to three types of synthetic materials: plastics, synthetic rubber, and synthetic fibers. Synthetic polymers possess properties that natural polymers lack or have superior properties, such as lower density, higher mechanical strength, wear resistance, corrosion resistance, and electrical insulation.

[0107] For example, the polymer material in the main body layer 1114 can be plastic. Plastic is made primarily of synthetic resins or chemically modified natural polymers, with the addition of fillers, plasticizers, and other additives. The intermolecular secondary valence forces, modulus, and deformation of plastics are intermediate between those of rubber and fibers. Plastics are classified into thermosetting plastics and thermoplastic plastics, and according to their uses, plastics are further classified into general-purpose plastics and engineering plastics.

[0108] For example, the polymer material in the main body layer 1114 can be a synthetic fiber material, which includes natural fibers or synthetic fibers. The fibers are made into fiberboard, thereby forming the main body layer 1114. The synthetic fiberboard has the characteristics of low mass density, light weight and excellent electrical insulation, which can meet the lightweight requirements of the box 1110.

[0109] In this embodiment, the main body layer 1114 is synthesized from polymer materials and shielding materials. While ensuring structural strength, it can significantly reduce the weight of the main body layer 1114 and has a certain impact resistance. The main body layer 1114 is combined with the shielding layer 1115, so that the box 1110 can have both shielding function and lightweight advantages.

[0110] Additionally, it should be noted that a small amount of shielding material can be added to the material of the main layer 1114. For example, the shielding material can be a metal, such as copper powder or aluminum powder. For instance, adding 10% copper powder to the polymer material, with a particle size of 3-6 μm, and ensuring the copper powder is uniformly dispersed within the polymer material, is possible. The mixing ratio of polymer material to metal material can be 9:1, ensuring the weight of the metal material is less than the weight of the polymer material, thus achieving weight reduction.

[0111] In the main body layer 1114, the weight of the shielding material can be less than 20% of the total weight of the main body layer 1114. The weight of the main body layer 1114 is the sum of the weight of the shielding material and the weight of the polymer material. In order to coordinate the weight of the housing 1110 and the structural strength, the weight of the shielding material added during the preparation of the main body layer 1114 shall not exceed 20% of the total weight of the main body layer 1114. For example, the weight of the shielding material may be 1%, 3%, 5%, 10%, 13%, 15%, 17%, 19%, etc., of the weight of the main body layer 1114. This percentage can be any value between 0% and 20%.

[0112] During the preparation of the main body layer 1114, polymer materials and shielding materials (such as metals or graphene) can be mixed and injection molded using a die-casting machine or an extruder to form an integrated main body layer 1114. The shielding material in the main body layer 1114 and the shielding material in the outer shielding layer 1115 form a shielding mesh, which can assist the shielding layer 1115 in conducting electromagnetic waves, thereby improving the shielding capability of the enclosure 1110.

[0113] In a specific example, the metal material can be kept in a granular state in the main body layer 1114. For example, metal particles can be uniformly distributed in the main body layer 1114, and the metal particles can form a conductive connection with the outer shielding layer 1115, thereby assisting the shielding layer 1115 in conducting electromagnetic waves.

[0114] For example, the main body layer 1114 is made of PP (polypropylene) material, and its mass density is 1.1 g / cm³ without the addition of metal materials. The volume resistivity of PP (polypropylene) material is approximately 10⁻⁶. 15 Ω After adding 10% copper powder, the volume resistivity of the 1114 substrate layer decreased to 10Ω. The copper powder in the main body layer 1114 significantly improves the conductivity. When external electromagnetic waves penetrate the shielding layer 1115, the copper powder in the main body layer 1114 can conduct the remaining electromagnetic waves to the shielding layer 1115 and then to the grounding terminal, thereby increasing the overall shielding effectiveness from 50dB without copper powder to 55dB, an increase of 10%. With only 10% copper powder added, the mass density of the main body layer 1114 increases from 1.1g / cm³ to 1.2g / cm³, with a weight increase of only 9.1%, which is far lower than the weight of the all-metal main body layer 1114.

[0115] In this embodiment, by adding shielding material to the main body layer 1114, the conductivity of the main body layer 1114 can be improved, which helps to enhance the overall electromagnetic shielding effectiveness of the enclosure 1110, while not significantly increasing the weight and maintaining the lightweight characteristics of the enclosure 1110.

[0116] In some embodiments, the main body layer 1114 is made of conductive plastic.

[0117] Specifically, conductive plastics are functional polymer materials that are mixed with resin (polymer materials) and conductive substances (shielding materials or metal materials) and processed using plastic processing methods. Conductive plastics are conductive polymer materials. They combine the conductivity of metals with the lightweight and insulating properties of plastics.

[0118] Conductive plastics are functional polymer materials with electrical conductivity. They are created by introducing conductive components (such as metals or carbon materials) into an insulating plastic substrate (polymer material), breaking the inherent "insulating" property of traditional plastics. This allows the material to simultaneously possess the advantages of polymer materials, such as lightweight, easy processing, and corrosion resistance, as well as the current or charge transport capabilities of a conductor. Conductive plastics are not a single material, but rather a composite system of "plastic-conductive substances" designed according to conductivity mechanisms and compositions. The main layer 1114, made of conductive plastic, combines the advantages of shielding performance and lightweight design.

[0119] In this embodiment, the main body layer 1114 is made of conductive plastic, which is easy to obtain and has low cost. It is also easy to process and manufacture, which helps to reduce manufacturing costs.

[0120] In some embodiments, refer to Figure 3 As shown, the thickness L2 of the main layer is greater than the thickness L1 of the shielding layer, which can also be understood as the thickness L1 of the shielding layer being less than the thickness L2 of the main layer.

[0121] Specifically, since the main body layer 1114 is the main supporting part of the enclosure 1110 and the enclosure wall 1113, the main body layer 1114 needs to have a certain rigidity and strength. The thickness L2 of the main body layer should not be too thin. The thickness L2 of the main body layer should be greater than the thickness L1 of the shielding layer, so that the main body layer 1114 of the enclosure 1110 and the enclosure wall 1113 has the ability to resist damage and deformation.

[0122] Since the mass density of the main layer 1114 is less than that of the shielding layer 1115, the smaller the thickness L1 of the shielding layer, the lighter the weight of the enclosure 1110, which is more conducive to the lightweight design of the enclosure 1110. While ensuring the shielding function of the enclosure 1110, the thickness L1 of the shielding layer should be less than the thickness L2 of the main layer, and the thickness L1 of the shielding layer should be as small as possible. While ensuring the structural strength and rigidity of the enclosure 1110, the thickness L2 of the main layer should not be too large. The thickness L1 of the shielding layer can be 10 times the thickness of the main layer 1114. -4 -10 -1 times.

[0123] In this embodiment, the thickness L2 of the main body layer is greater than the thickness L1 of the shielding layer, which can optimize the contradiction between the weight of the enclosure 1110 and the shielding function, so that the enclosure 1110 has sufficient rigidity and strength while also having a shielding function.

[0124] In some embodiments, refer to Figure 3 As shown, the thickness L2 of the main layer is 2mm-4mm.

[0125] Specifically, the thickness L2 of the main body layer can be any value between 2mm and 4mm. For example, the thickness L2 of the main body layer can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc. The thickness L2 of the main body layer can be optimized according to the external dimensions of the housing 1110 and the weight of the battery cell assembly 1120, so that the main body layer 1114 has sufficient rigidity and strength while taking into account lightweight design.

[0126] In some embodiments, refer to Figure 3 As shown, the thickness L1 of the shielding layer is 0.1μm~5.0μm.

[0127] The shielding layer 1115 is made of metallic material; therefore, the thickness L1 of the shielding layer should not be too thick. Designing the thickness L1 to be between 0.1 μm and 5.0 μm can minimize the weight of the enclosure 1110. The thickness L1 of the shielding layer can be any value between 0.1 μm and 5 μm; for example, the thickness L1 can be 0.1 μm, 0.5 μm, 1.0 μm, 2.0 μm, 3.0 μm, 4.0 μm, 5.0 μm, etc.

[0128] Of course, in cases where shielding requirements are high, the thickness L1 of the shielding layer can be appropriately increased to 0.5mm. In this case, the shielding layer 1115 can also be a plate structure, which can be considered as a thin plate, so that the shielding layer 1115 and the surface of the main body layer 1114 are bonded together and formed into an integrated box 1110 by pressing or bonding.

[0129] In this embodiment, a reasonable thickness is selected according to the different functional requirements of the enclosure 1110. While ensuring the shielding performance and lightweight advantages of the enclosure 1110, material waste and weight redundancy are reduced, which helps to reduce manufacturing costs.

[0130] In some embodiments, the shielding layer 1115 is electroplated or coated on the surface of the main body layer 1114.

[0131] Due to the lightweight requirements of the enclosure 1110, the thickness L1 of the shielding layer should be as small as possible. For example, the thickness L1 of the shielding layer can be 0.1μm to 5.0μm. In this case, electroplating or spraying can be used to form the shielding layer 1115 on the surface of the main body layer 1114.

[0132] Specifically, the shielding layer 1115 is electroplated onto the surface of the main body layer 1114 using an electroplating process. For example, the pre-formed main body layer 1114 is placed inside an electroplating bath for an oxidation-reduction reaction, and metal atoms inside the electrolytic cell accumulate on the outer surface of the main body layer 1114. Alternatively, the shielding layer 1115 can be made of an electromagnetic shielding paint, a functional paint using nickel metal particles as conductive fillers. Using a spraying tool, the electromagnetic shielding paint is sprayed or brushed onto the outer surface of the main body layer 1114, forming a conductive coating. Utilizing the conductivity of this coating, the shielding layer 1115 possesses the same electromagnetic wave absorption, conduction, and attenuation properties as metal, thereby reducing interference from external electromagnetic waves to the internal circuits and components of the enclosure 1110.

[0133] In this embodiment, electroplating or coating can reduce the thickness L1 of the shielding layer as much as possible, which is beneficial to further reduce the weight of the shielding layer 1115 and thus improve the lightweight effect of the housing 1110.

[0134] In some embodiments, the insulating layer 1116 is an insulating film, which is attached to the surface of the main body layer 1114 facing the receiving cavity 1118.

[0135] Specifically, the function of the insulating layer 1116 is insulation. Therefore, the installation of the insulating layer 1116 should not excessively increase the weight of the enclosure 1110. Thus, the insulating layer 1116 can be made of insulating film. Insulating film is lightweight and will not significantly increase the weight of the enclosure 1110. In addition, insulating film is easy to manufacture and obtain, and can be directly bonded to the insulating layer 1116 by adhesive, making the connection more convenient and easy to operate. Alternatively, a secondary injection molding process can be used to ensure that the bonding strength between the insulating film and the main body layer 1114 is ≥3MPa (through peel test), thereby reducing the risk of the insulating film falling off due to long-term vibration and improving the reliability of the insulating film connection.

[0136] The insulating film can be made of PET (polyethylene terephthalate) or PI (polyimide), which gives it the properties of high and low temperature resistance (-40℃-125℃) and resistance to electrolyte corrosion (no change in insulation resistance after immersion in dimethyl carbonate electrolyte for 72 hours), thus improving the stability of the insulating film during use.

[0137] The thickness of the insulating film (i.e., the thickness L3 of the insulating layer) is set to a range of 0.05mm-1.00mm. This means the thickness can be any value between 0.05mm and 1.00mm, such as 0.05mm, 0.10mm, 0.20mm, 0.30mm, 0.40mm, 0.50mm, 0.60mm, 0.70mm, 0.80mm, 0.90mm, 0.10mm, etc. The thickness of the insulating film can be selected based on the external dimensions of the housing 1110 and the required insulation level of the battery device 1100. Larger external dimensions and higher insulation levels require a thicker insulating film.

[0138] In this embodiment, the insulating layer 1116 is an insulating film, which makes the preparation of the housing 1110 more convenient and helps to reduce manufacturing costs.

[0139] In some embodiments, refer to Figure 2-5 As shown, the enclosure 1110 includes a first enclosure 1111 and a second enclosure 1112. The first enclosure 1111 and the second enclosure 1112 are connected and together enclose to form an accommodating cavity 1118. At least one of the enclosure wall 1113 of the first enclosure 1111 and the enclosure wall 1113 of the second enclosure 1112 includes an insulating layer 1116, a main body layer 1114 and a shielding layer 1115.

[0140] Specifically, the housing 1110 may include a first housing 1111 and a second housing 1112. The first housing 1111 and the second housing 1112 are arranged opposite to each other in the third direction Z and are interlocked, so that the interior of the housing 1110 forms a closed space, which is the receiving cavity 1118, to accommodate the battery cell assembly 1120. The above-mentioned closure refers to covering or closing, which can be sealed or unsealed. The first housing 1111 may be a top cover or a bottom plate. For example, the housing 1110 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 1110 forms a closed space to accommodate the battery cell assembly 1120. Of course, the housing 1110 formed by the first housing 1111 and the second housing 1112 can be of various shapes, such as a cylinder, a cuboid, etc. In this application, a rectangular housing 1110 is used as an example for illustration.

[0141] Therefore, in the enclosure 1110, the enclosure wall 1113 of the first enclosure 1111 can adopt the layered structure including the insulation layer 1116, the main body layer 1114 and the shielding layer 1115 as described above, or the enclosure wall 1113 of the second enclosure 1112 can adopt the layered structure including the insulation layer 1116, the main body layer 1114 and the shielding layer 1115 as described above, or the enclosure wall 1113 of the first enclosure 1111 and the enclosure wall 1113 of the second enclosure 1112 can simultaneously adopt the layered structure including the insulation layer 1116, the main body layer 1114 and the shielding layer 1115 as described above. For example, when the first housing 1111 is a top cover, the second housing 1112 has a receiving groove for accommodating the battery cell assembly 1120. The first housing 1111 is placed on the second housing 1112, thereby closing the receiving groove to form a receiving cavity 1118. It can be seen that the volume and weight of the second housing 1112 are greater than those of the first housing 1111. Therefore, when only one layered structure can be selected, the housing wall 1113 of the second housing 1112 can be made to adopt the layered structure including the main body layer 1114 and the shielding layer 1115 as described above.

[0142] In this embodiment, depending on the structural form of the box 1110, the box wall 1113 of the box 1110 can be partially or entirely layered, which is beneficial to reasonably control the manufacturing cost of the box 1110.

[0143] In some embodiments, refer to Figure 5-10As shown, the battery device 1100 also includes a first shield 1130, which is connected to the shielding layer 1115; the casing wall 1113 has an assembly hole 1117 for inserting a connector 1140, the first shield 1130 is disposed in the assembly hole 1117 and surrounds the outer periphery of the connector 1140; the connector 1140 includes a contact 1143, a housing 1141 and a second shield 1142, the housing 1141 is inserted into the assembly hole 1117, the contact 1143 is connected to the housing 1141 and electrically connected to the battery cell assembly 1120, and the second shield 1142 is connected to the housing 1141 and electrically connected to the first shield 1130.

[0144] Specifically, in the connection system between the battery device 1100 and external devices (such as chargers and power terminals), the connector 1140 is the core component for realizing power transmission and signal interaction. The connector 1140 is a precision component that combines electrical performance, mechanical strength, and safety protection. Understandably, the role of the connector 1140 is to build a "bridge" between the battery device 1100 and the load, ensuring stable current flow while preventing risks such as short circuits and leakage. Furthermore, it must adapt to the installation, disassembly, and environmental adaptability requirements of different scenarios. The connector 1140 has the characteristics of being "pluggable" or "assembleable." For example, the connector 1140 can be plugged into the assembly hole 1117, enabling rapid assembly and maintenance (such as battery replacement and equipment repair), and its standardized design allows it to be adapted to different models of battery devices 1100 and equipment.

[0145] Typically, combined Figure 8 and Figure 11 As shown, connector 1140 includes contacts 1143, a housing 1141, and a second shield 1142. Contact 1143 is the "conductive core" of connector 1140 and is typically made of a copper alloy (such as brass or phosphor bronze) (good conductivity and elasticity). Contacts 1143 can be made of a highly conductive metal material, and their number is determined according to the power and signal transmission requirements. Contacts 1143 are used for electrical connection to battery cell assembly 1120. For example, if a total output terminal is connected to battery cell assembly 1120, contact 1143 is electrically connected to the total output terminal. Alternatively, a conductor (or wire) may be connected to battery cell assembly 1120, and the conductor is positioned between battery cell assembly 1120 and contact 1143, thereby achieving electrical connection between battery cell assembly 1120 and contact 1143.

[0146] The outer shell 1141 serves as the main support for the connector 1140. The contact 1143 and the second shield 1142 are both mounted on the outer shell 1141. The outer shell 1141 may have a mounting groove, within which the contact 1143 can be disposed. The outer shell 1141 may be made of a lightweight and high-strength metal material, thus providing shielding. The overall shape of the outer shell 1141 is adapted to the assembly hole 1117 of the housing 1110 in the battery device 1100. A guide structure may be provided inside or outside the assembly hole 1117. The outer shell 1141 is inserted into the assembly hole 1117 through the guide structure, enabling the contact 1143 to make an electrical connection with the battery cell assembly 1120.

[0147] Since connector 1140 needs to form a low-impedance loop through a ground connection with the outside world, it can conduct external electromagnetic interference to ground. Therefore, a second shield 1142 is connected to the housing 1141, and the second shield 1142 can be considered as part of the grounding loop in connector 1140.

[0148] For the shielding and grounding of connector 1140, a first shield 1130 is provided, and a second shield 1142 can be electrically connected to the shielding layer 1115 through the first shield 1130, so that the outer shell 1141 of connector 1140 can be connected to the shielding layer 1115, thereby forming a grounding path for connector 1140.

[0149] The first shielding element 1130 is made of metal and is conductive. It is connected to the wall 1113 of the housing 1110 and disposed within the assembly hole 1117. The first shielding element 1130 is electrically connected to the shielding layer 1115; for example, it is in direct contact with the shielding layer 1115. The first shielding element 1130 can be in various shapes, such as ring-shaped, plate-shaped, or strip-shaped.

[0150] The second shield 1142 is part of the connector 1140. After the housing 1141 is inserted into the assembly hole 1117, the second shield 1142 can contact the first shield 1130, thereby forming a conductive path (or grounding path) between the housing 1141, the second shield 1142, the first shield 1130 and the shielding layer 1115, so that the shielding grounding design of the connector 1140 can be realized by means of the shielding layer 1115.

[0151] In this embodiment, by providing a first shield 1130 and a second shield 1142, after the connector 1140 is inserted into the assembly hole 1117 of the housing 1110, the first shield 1130 and the second shield 1142 come into contact, thereby connecting the grounding circuit of the connector 1140 to the shielding layer 1115. The shielding grounding is achieved by relying on the shielding layer 1115, making the shielding and grounding of the connector 1140 more convenient and ensuring the stability of signal transmission.

[0152] In some embodiments, refer to Figure 5 and Figure 6 As shown, the first shielding component 1130 is a shielding ring, which is nested in the assembly hole 1117. The shielding ring is in contact with the shielding layer 1115, and the shielding ring is surrounded on the outer peripheral surface of the outer shell 1141.

[0153] Specifically, the first shielding member 1130 is an annular shielding ring, which is coaxially arranged with the assembly hole 1117, such that the ring wall of the shielding ring is embedded in the hole wall of the assembly hole 1117. Then, the second shielding member 1142 can be installed on the outer surface of the housing 1141. After the housing 1141 is inserted into the assembly hole 1117, the second shielding member 1142 can contact the ring wall surface of the shielding ring, thereby realizing electrical connection.

[0154] The first shielding component 1130 can adopt an integrated shielding ring design, and the shielding ring is made of a metal material with excellent conductivity. The assembly hole 1117 of the housing 1110 has an annular groove that matches the shielding ring, and the shielding ring can be nested in the annular groove. The position of the annular groove can be close to the shielding layer 1115, so that after the shielding ring is installed in the annular groove, the shielding ring can partially contact the shielding layer 1115. Alternatively, the shielding ring has an outwardly protruding connecting part, which can extend to the shielding layer 1115 of the housing wall 1113, thereby realizing the connection and conduction between the shielding ring and the shielding layer 1115.

[0155] In this embodiment, by nesting the shielding ring inside the assembly hole 1117, the connector 1140 can reliably contact the second shield 1142 after being inserted into the assembly hole 1117. The structure is simple and the operation is more convenient.

[0156] In some embodiments, refer to Figure 10 As shown, the shielding ring is elastic to be able to contract and expand radially, and the inner ring wall of the shielding ring can abut against the second shield 1142.

[0157] Specifically, the first shielding element 1130 can be a shielding ring. It is known that the shielding ring has an inner ring wall and an outer ring wall. When the connector 1140 is inserted into the assembly hole 1117, the shielding ring is sleeved on the outer surface of the housing 1141, so that the inner ring wall of the shielding ring comes into contact with the second shielding element 1142 on the outer surface of the housing 1141.

[0158] The shielding ring can be made of an elastic material, or, through structural design, the metal shielding ring can expand and contract, making it elastic. The elastic deformation direction of the shielding ring is along its radial direction, and the shielding ring can contract and expand radially. Therefore, when the outer shell 1141 is inserted into the shielding ring, the shielding ring can exert a compressive force on the outer shell 1141 and the second shielding member 1142 on the outer shell 1141, causing the shielding ring and the second shielding member 1142 to come into contact.

[0159] In this embodiment, by giving the shielding ring the ability to contract and expand, when the shielding ring comes into contact with the second shielding member 1142, it can exert a compressive force on the second shielding member 1142, thereby improving the reliability of the connection between the shielding ring and the second shielding member 1142 and reducing the risk of poor contact.

[0160] In some embodiments, refer to Figure 4 As shown, the housing 1110 has a locking position 1160 for connecting fasteners to limit the battery in the electrical device; the battery device 1100 also includes a guide wire 1150, one end of which is connected to the first shield 1130, and the other end of which extends to the shield layer 1115 and is connected to the locking position 1160.

[0161] Specifically, the housing 1110 (specifically, housing wall 1113) is provided with a locking position 1160 for fixing the battery device 1100. The locking position 1160 is usually connected to a fastener, which allows the battery device 1100 to be installed in the electrical device. For example, the housing 1110 is connected to the frame of the vehicle 1000 via the fastener at the locking position 1160. The connection between the housing 1110 and the frame allows the housing 1110 to be grounded through the frame. The guide wire 1150 may be made of multi-strand conductive material and wrapped with an insulating layer 1116 to prevent leakage. One end of the guide wire 1150 is connected to the first shield 1130, and the other end of the guide wire 1150 may extend to the locking position 1160. The guide wire 1150 is used to connect to the fastener at the locking position 1160, and then to the grounding structure of the electrical device (e.g., the frame of the vehicle 1000), thereby achieving reliable grounding.

[0162] For example, one end of the guide wire 1150 can be fixedly connected to the first shield 1130 through a connecting terminal. The connection part can be treated with an anti-loosening structure to reduce the risk of detachment caused by vibration. The other end of the guide wire 1150 is fixedly connected to the shielding layer 1115 of the box wall 1113. For example, the other end of the guide wire 1150 can be extended and arranged on the surface of the shielding layer 1115, so that the guide wire 1150 and the shielding layer 1115 form a sufficient contact area. The other end of the guide wire 1150 extends to the locking position 1160, which can be connected to the grounding terminal of the electrical device through the same fastener to form a complete grounding path.

[0163] In this embodiment, the guide wire 1150 enables the first shield 1130, the shielding layer 1115 of the box wall 1113, and the grounding structure of the electrical device to conduct, so that electromagnetic waves can be efficiently guided into the ground, further enhancing the shielding effect. The guide wire 1150 extends to the locking position 1160 and shares a fastener, reducing the setting of additional grounding nodes, simplifying the installation process, reducing assembly costs, and reducing the problem of increased grounding resistance caused by multiple nodes, thus ensuring stable grounding performance.

[0164] In some embodiments, refer to Figure 8-11 As shown, the second shield 1142 is elastic and can expand and contract elastically. The second shield 1142 can abut against the first shield 1130 by elastic expansion or contraction.

[0165] Specifically, the second shielding element 1142 can be made of an elastic metal material, or the second shielding material can be made of a metal material and formed into an elastic structure that can elastically contract or expand. For example, the second shielding element 1142 can be a spring sheet, which contracts under pressure and expands outward elastically when there is no pressure, and expands outward toward the direction closer to the first shielding element 1130.

[0166] When connector 1140 is inserted into assembly hole 1117, the hole wall of assembly hole 1117 will exert a compressive force on housing 1141 and second shield 1142. Since the first shield 1130 is disposed on the hole wall of assembly hole 1117, when the second shield 1142 moves to a position opposite to the first shield 1130, the second shield 1142 compresses the first shield 1130 to achieve contact connection with the first shield 1130. In the case that the first shield 1130 is a shielding ring, the second shield 1142 can abut against the inner ring wall of the shielding ring or abut against the ring side of the shielding ring.

[0167] In this embodiment, the second shield 1142 can expand and contract elastically, thereby enabling a reliable connection between the second shield 1142 and the first shield 1130 and reducing the risk of poor contact between the second shield 1142 and the first shield 1130.

[0168] Unlike the elastically deformable second shield 1142 described above, in this embodiment, referring to... Figure 9 and Figure 10 As shown, the second shield 1142 is movably connected to the housing 1141. The connector 1140 also includes an elastic member 1144, which is connected between the second shield 1142 and the housing 1141 so that the second shield 1142 can abut against the first shield 1130.

[0169] This example takes into account the manufacturing process of the elastically deformable second shield 1142. Therefore, an elastic element 1144 is provided, which connects the second shield 1142 and the outer shell 1141 respectively. The elastic element 1144 can be elastically deformed, for example, the elastic element 1144 can be a spring. The elastic element 1144 can push the second shield 1142 to rotate relative to the outer shell 1141, so that the second shield 1142 can move towards the first shield 1130 during the rotation, so as to abut against the first shield 1130.

[0170] The second shielding element 1142 is movably connected to the outer shell 1141. For example, the second shielding element 1142 is a conductive sheet, one end of which can be rotatably connected to the outer shell 1141 via a pivot, allowing the other end of the conductive sheet to swing around the pivot. An elastic element 1144 is connected between the conductive sheet and the surface of the outer shell 1141, allowing the other end of the conductive sheet to swing back and forth, thereby causing the swinging end of the conductive sheet to abut against the first shielding element 1130. When the first shielding element 1130 is a shielding ring, the swinging end of the conductive sheet can abut against the inner ring wall of the shielding ring or against the side of the shielding ring.

[0171] When connector 1140 is inserted into assembly hole 1117, the hole wall of assembly hole 1117 will exert a compressive force on housing 1141 and second shield 1142, and elastic member 1144 will be compressed. Since the first shield 1130 is disposed on the hole wall of assembly hole 1117, when the second shield 1142 moves to a position opposite to the first shield 1130, the second shield 1142 will compress the first shield 1130 under the action of the elastic force of elastic member 1144, thereby achieving contact connection with the first shield 1130.

[0172] In this embodiment, by providing an elastic element 1144, the second shielding element 1142 can abut against the first shielding element 1130 under the action of elastic force, thereby enabling a reliable connection between the second shielding element 1142 and the first shielding element 1130 and reducing the risk of poor contact between the second shielding element 1142 and the first shielding element 1130.

[0173] In some embodiments, refer to Figure 8 As shown, the second shield 1142 is connected to the box wall 1113 (i.e., the box body 1110) so that the second shield 1142 is confined within the assembly hole 1117.

[0174] Specifically, while the second shielding member 1142 can contact the first shielding member 1130, the second shielding member 1142 can also be connected to the housing 1110, thereby forming a limiting connection relationship between the second shielding member 1142 and the housing 1110. For example, the second shielding member 1142 forms an insertion limiting relationship with the wall of the assembly hole 1117 of the housing wall 1113, thereby allowing the second shielding member 1142 and the outer shell 1141 to be limited within the assembly hole 1117.

[0175] It can be seen that the connection between the second shield 1142 and the housing 1110 can be considered as a locking limit, which can lock and limit the connector 1140 within the assembly hole 1117 of the housing 1110, thereby improving the reliability of the connection between the connector 1140 and the housing 1110.

[0176] In another interpretation, the connector 1140 is provided with a snap-fit ​​structure, which can form a locking or snap-fit ​​limit with the housing 1110. After the connector 1140 is inserted into the assembly hole 1117 of the housing 1110, the snap-fit ​​structure is located within the assembly hole 1117 and is connected to the assembly hole 1117 to form a locking and limiting connection. Then, the second shield 1142 can be connected to this snap-fit ​​structure, or the second shield 1142 can be part of the snap-fit ​​structure. When the snap-fit ​​structure and the housing 1110 are locked and limited, the second shield 1142 can contact the first shield 1130.

[0177] In this embodiment, by connecting the second shield 1142 to the housing 1110, the second shield 1142 also has a locking and limiting function, thereby improving the reliability of the connection between the connector 1140 and the housing.

[0178] In one specific embodiment, refer to Figure 2-12As shown, the battery device 1100 includes a battery cell assembly 1120 and a housing 1110. The housing 1110 includes a housing wall 1113, which includes an insulating layer 1116, a main body layer 1114, and a shielding layer 1115 stacked sequentially. The main body layer 1114 forms a receiving cavity 1118, and the shielding layer 1115 is connected to the surface of the main body layer 1114 away from the receiving cavity 1118. The shielding layer 1115 is a shielding layer made of shielding material. The main body layer 1114 is a main body layer including a portion of the shielding material. The battery cell assembly 1120 is housed in the receiving cavity 1110. 118 is inside; the shielding material is metal or graphene; in the main body layer 1114, the weight of the shielding material is less than 20% of the weight of the main body layer 1114; the main body layer 1114 is conductive plastic; the thickness L2 of the main body layer is greater than the thickness L1 of the shielding layer; the thickness L1 of the shielding layer is 0.1μm~5.0μm; the shielding layer 1115 is electroplated or coated on the surface of the main body layer 1114; the battery device 1100 also includes a first shielding member 1130, which is connected to the shielding layer 1115; the box wall 1113 has an assembly hole 1117, which is used for... For the plug-in connector 1140, a first shield 1130 is disposed within the assembly hole 1117; the connector 1140 includes a contact 1143, a housing 1141, and a second shield 1142. The housing 1141 is plugged into the assembly hole 1117, the contact 1143 is connected to the housing 1141 and electrically connected to the battery cell assembly 1120, and the second shield 1142 is connected to the housing 1141 and electrically connected to the first shield 1130; the first shield 1130 is a shielding ring, which is nested within the assembly hole 1117 and contacts the shielding layer 1115. The shielding is surrounding the outer periphery of the housing 1141; the housing 1110 has a locking position 1160 for connecting fasteners to limit the battery device; the battery device 1100 also includes a guide wire 1150, one end of which is connected to the first shielding member 1130, and the other end of which extends to the shielding layer 1115 and is connected to the locking position 1160; the second shielding member 1142 is elastic and can expand and contract elastically, and the second shielding member 1142 can abut against the first shielding member 1130 by elastic expansion or contraction.

[0179] According to some embodiments of this application, refer to Figure 1 As shown, this application also provides an electrical device, which includes the battery device 1100 in the above embodiments. The battery device 1100 is used to store or provide electrical energy.

[0180] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0181] The examples of electrical devices in this application are based on the examples of the battery device 1100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 1100 described above, and will not be repeated here.

[0182] According to some embodiments of this application, this application also provides an energy storage device, which includes the battery device 1100 in the above embodiments.

[0183] Specifically, the energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices 1100, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0184] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0185] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0186] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0187] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0188] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1100 via piping to regulate the temperature of the individual battery cells.

[0189] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0190] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0191] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0192] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0193] According to some embodiments of this application, this application also provides an energy storage system, which includes the energy storage device in the above embodiments.

[0194] In some embodiments, an energy storage system may include one or more energy storage devices and a power conversion system (PCS), wherein the power conversion system is connected between a power generation device and an energy storage device. The power generation device generates electrical energy, the energy storage device stores electrical energy, and the power conversion system converts the current input to the energy storage device or the current output from the energy storage device into power. The electrical energy generated by the power generation device can be stored in the energy storage device through the power conversion system, and the electrical energy stored in the energy storage device can also be output to a load or the power grid through the power conversion system. As examples, the power generation device may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0195] According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0196] For example, the charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to a battery device 1100 within the energy storage device via cables. The battery device 1100 can supply its stored electrical energy to the charging stations. The charging stations have one or more connectors for connecting to electrical devices (such as vehicle 1000), thereby enabling them to replenish power.

[0197] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0198] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, include: Battery cell assembly; The enclosure includes a wall, which comprises an insulating layer, a main body layer, and a shielding layer stacked sequentially. The main body layer forms a receiving cavity, and the shielding layer is connected to the surface of the main body layer away from the receiving cavity. The shielding layer is made of a shielding material. The main body layer includes a portion of the shielding material. The battery cell assembly is housed within the receiving cavity.

2. The battery device as claimed in claim 1, characterized in that, The shielding material is a metal or graphene.

3. The battery device as claimed in claim 1, characterized in that, In the main body layer, the weight of the shielding material is less than 20% of the weight of the main body layer.

4. The battery device as claimed in claim 1, characterized in that, The main body layer is made of conductive plastic.

5. The battery device as claimed in claim 1, characterized in that, The thickness of the main body layer is greater than the thickness of the shielding layer.

6. The battery device as claimed in claim 5, characterized in that, The thickness of the main body layer is 2mm-4mm; and / or, The thickness of the shielding layer is 0.1μm to 5.0μm.

7. The battery device as claimed in claim 5, characterized in that, The shielding layer is electroplated or coated on the surface of the main body layer.

8. The battery device according to any one of claims 1-7, characterized in that, The enclosure wall also includes an insulating layer, which is stacked on the surface of the main body layer facing the accommodating cavity.

9. The battery device as claimed in claim 8, characterized in that, The insulating layer is an insulating film, which is attached to the surface of the main body layer facing the accommodating cavity.

10. The battery device according to any one of claims 1-7, characterized in that, The enclosure includes a first enclosure and a second enclosure, which are connected and together enclose the cavity; at least one of the enclosure walls of the first enclosure and the second enclosure includes the insulating layer, the main body layer and the shielding layer.

11. The battery device according to any one of claims 1-7, characterized in that, The battery device further includes a first shielding member connected to the shielding layer; the casing wall has an assembly hole for inserting a connector, and the first shielding member is disposed in the assembly hole; the connector includes a contact, a housing, and a second shielding member, the housing is inserted into the assembly hole, the contact is connected to the housing and electrically connected to the battery cell assembly, and the second shielding member is connected to the housing and electrically connected to the first shielding member.

12. The battery device as claimed in claim 11, characterized in that, The first shielding component is a shielding ring, which is nested in the assembly hole and contacts the shielding layer. The shielding ring is surrounded on the outer circumferential surface of the outer shell.

13. The battery device as claimed in claim 12, characterized in that, The shielding ring is elastic enough to contract and expand radially, and the inner ring wall of the shielding ring can abut against the second shielding member.

14. The battery device as claimed in claim 11, characterized in that, The housing has a locking position for connecting fasteners to limit the battery device; the battery device also includes a guide wire, one end of which is connected to the first shield, and the other end of which extends to the shield and is connected to the locking position.

15. The battery device as claimed in claim 11, characterized in that, The second shielding member is elastic and can expand and contract elastically, and the second shielding member can abut against the first shielding member by elastic expansion or contraction.

16. The battery device as claimed in claim 11, characterized in that, The second shielding member is movably connected to the housing. The connector also includes an elastic member connected between the second shielding member and the housing, so that the second shielding member can abut against the first shielding member.

17. The battery device as claimed in claim 15 or 16, characterized in that, The second shielding member is connected to the box wall so that the second shielding member is confined within the assembly hole.

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

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