Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a relay, a connector and an electric connecting structure, the electric connecting structure comprises an electric connecting piece, the electric connecting piece is electrically connected with the relay and the connector, the surface of at least part of the electric connecting piece is coated with an electromagnetic shielding layer, and the electromagnetic shielding layer is a conductive net arranged on the electric connecting piece in a sleeving mode. The conductive net electromagnetic shielding layer can guide, reflect or absorb electromagnetic waves generated by the electric connecting piece, and the propagation of the electromagnetic waves is reduced, so that the influence of the electromagnetic waves on the precision of precise devices such as a current sensor is reduced; therefore, the problem that the charging and discharging efficiency of the battery is reduced due to inaccurate electric quantity estimation of the battery management system caused by precision reduction of precise devices such as the current sensor is reduced. Therefore, the influence of the large overcurrent electric connector on the precision of the precision device can be reduced, and the battery performance is improved.

Description

Technical Field

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

[0002] The electrical connector is an electrical connection structure provided in the battery pack. As the overcurrent demand of the battery pack increases, the large overcurrent electrical connector will affect the accuracy of the precision devices in the battery pack, thereby affecting the battery performance. Utility Model Content

[0003] In view of the above problems, the present application provides a battery device and an electrical device, aiming to reduce the impact of large overcurrent electrical connectors on the accuracy of precision devices.

[0004] In a first aspect, the present application provides a battery device, comprising a relay, a connector and an electrical connection structure, wherein the electrical connection structure comprises an electrical connector, wherein the electrical connector electrically connects the relay and the connector, wherein at least a portion of the surface of the electrical connector is coated with an electromagnetic shielding layer, wherein the electromagnetic shielding layer is a conductive mesh sleeved on the electrical connector.

[0005] In the technical solution of the embodiment of the present application, the electromagnetic shielding layer can guide, reflect or absorb the electromagnetic waves generated by the electrical connector, reducing the propagation of the electromagnetic waves, thereby reducing the impact of the electromagnetic waves on the accuracy of precision devices such as current sensors, and further reducing the problem of reduced battery charging and discharging efficiency due to inaccurate estimation of the battery management system for the amount of electricity caused by reduced accuracy of precision devices such as current sensors. In addition, the mesh electromagnetic shielding layer has a certain elasticity compared to the sheet electromagnetic shielding layer. When used for electrical connectors with bends, the mesh electromagnetic shielding layer is more conducive to being mounted on the electrical connector. Therefore, the present application can reduce the impact of large overcurrent electrical connectors on the accuracy of precision devices, thereby improving battery performance.

[0006] In some embodiments, the conductive mesh is selected from a metal conductive mesh, a metal composite material conductive mesh, and a conductive polymer material conductive mesh.

[0007] In the technical solution of the embodiment of the present application, the metal conductive mesh, the metal composite material conductive mesh and the conductive polymer material conductive mesh are all conductive. When the electromagnetic wave reaches the surface of the conductive mesh, due to the conductivity of the conductive mesh, an induced current will be generated on the surface of the conductive mesh. This induced current will generate an electromagnetic field opposite to the incident electromagnetic wave, thereby causing the incident electromagnetic wave to be reflected back; in addition, part of the electromagnetic wave can enter the interior of the conductive mesh, where the electromagnetic wave will cause electron movement, thereby converting electromagnetic energy into heat energy and being consumed.

[0008] In some embodiments, the metal conductive mesh includes an iron conductive mesh, a nickel conductive mesh and a copper conductive mesh; and / or, the metal composite material conductive mesh includes a ferrite conductive mesh, an iron-based nanocrystalline alloy conductive mesh, a nickel-based nanocrystalline alloy conductive mesh and a cobalt-based nanocrystalline alloy conductive mesh; and / or, the conductive polymer material conductive mesh includes a polyaniline conductive mesh, a polypyrrole conductive mesh, a polythiophene conductive mesh and a conductive polystyrene conductive mesh.

[0009] In the technical solution of the embodiment of the present application, the selection of the conductive network is flexible and diverse, and can be selected according to needs.

[0010] In some embodiments, the conductive mesh satisfies at least one of the following conditions: the conductive mesh is a single-layer or multi-layer structure; the thickness of the conductive mesh is 0.2mm-0.6mm; the mesh aperture of the conductive mesh is 0.8mm-1.5mm; the wire diameter of the conductive mesh is 0.01mm-0.05mm.

[0011] In the technical solution of the embodiment of the present application, increasing the number of layers or thickness of the conductive mesh helps to improve the electromagnetic shielding effect. In addition, the mesh aperture of the conductive mesh is small, which can effectively block the propagation of electromagnetic waves.

[0012] In some embodiments, the electrical connection structure further includes a grounding component, the grounding component includes a grounding wire and a grounding terminal, and the grounding wire is connected between the electromagnetic shielding layer and the grounding terminal.

[0013] In the technical solution of the embodiment of the present application, the grounding component can promptly conduct away the induced charges in the electromagnetic shielding layer area, thereby reducing the secondary radiation generated by the charge accumulation and further improving the electromagnetic shielding effect.

[0014] In some embodiments, the electrical connector includes a connecting body and an insulating layer disposed on a surface of the connecting body, and the electromagnetic shielding layer is disposed on a surface of the insulating layer.

[0015] In the technical solution of the embodiment of the present application, an insulating layer is provided on the surface of the connection body to avoid short circuit failure caused by contact with other metal parts or wires.

[0016] In some embodiments, the insulating layer is selected from one of an insulating coating layer, an insulating film, an insulating tape, and a sleeve.

[0017] In the technical solution of the embodiment of the present application, the insulating coating layer can be formed by applying the insulating coating on the connecting body by spraying, brushing or dipping, which can provide long-term insulation protection; the insulating film can be directly coated on the surface of the connecting body to form insulation protection; the insulating tape can be pasted on the surface of the connecting body, which is soft and easy to operate, and can provide temporary or permanent insulation protection; the sleeve can be sleeved on the connecting body, and when the sleeve is a heat shrink sleeve or a cold shrink sleeve, it can tightly wrap the connecting body to form a solid insulation layer.

[0018] In some embodiments, the connection body includes a first connection piece and a second connection piece that are connected to each other, and the first connection piece and the second connection piece are both provided with connection holes.

[0019] In the technical solution of the embodiment of the present application, the connecting body is a flat structure as a whole, which is convenient for installation and fixation on the one hand, and on the other hand, the flat connecting body can carry a larger current.

[0020] In some embodiments, the first connecting piece is extended along a first direction, the second connecting piece is extended along a second direction, and the first direction and the second direction intersect.

[0021] In the technical solution of the embodiment of the present application, the L-shaped connection body can better adapt to the complex and compact space layout inside the battery device, and can make full use of the corner and edge space for setting to avoid interference with other components.

[0022] In some embodiments, each of the first connecting sheet and the second connecting sheet has at least one bent portion bent in the thickness direction.

[0023] In the technical solution of the embodiment of the present application, the connecting body with the bent portion can better adapt to the compact space in the battery device and avoid interference with other components.

[0024] In some embodiments, the electromagnetic shielding layer is disposed on both the first connecting sheet and the second connecting sheet.

[0025] In the technical solution of the embodiment of the present application, an electromagnetic shielding layer is provided on both the first connecting sheet and the second connecting sheet to further improve the electromagnetic shielding effect.

[0026] In some embodiments, the connection body is selected from one of a copper connection piece, an aluminum connection piece, and a copper-aluminum composite connection piece.

[0027] In the technical solution of the embodiment of the present application, the copper connector, the aluminum connector, and the copper-aluminum composite connector can be a rigid connection structure or a flexible connection structure. When the copper connector, the aluminum connector, and the copper-aluminum composite connector are rigid connection structures, they have high hardness and strength and can withstand large mechanical stress; in addition, the cross-sectional shape and size of the rigid connection structure are relatively fixed, and its current carrying capacity is relatively stable and reliable. When the copper connector, the aluminum connector, and the copper-aluminum composite connector are flexible connection structures, they can be bent and twisted to a certain extent to adapt to electrical connections of different shapes and space requirements.

[0028] In some embodiments, the battery device includes a box body, on which the connector is disposed; a high-voltage box is also disposed in the box body, and the relay is disposed in the high-voltage box.

[0029] In the technical solution of the embodiment of the present application, the connector is arranged on the box body to facilitate connection with the external electrical device. The relay is arranged in the high-voltage box to effectively protect it, and centralized control of the circuit connection between the battery device and the external electrical device can be achieved.

[0030] In some embodiments, the battery device further includes a current sensor, and the distance between the current sensor and the electrical connector is 1.0 mm-3.2 mm.

[0031] In the technical solution of the embodiment of the present application, the current sensor is arranged close to the electrical connector, which can improve the compactness of the battery device and thus meet higher current output requirements.

[0032] In a second aspect, the present application provides an electrical device, comprising any of the above-mentioned battery devices.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of a vehicle in some embodiments of the present application;

[0035] Figure 2 This is a schematic diagram of the exploded structure of a battery device in some embodiments of the present application;

[0036] Figure 3 This is a schematic diagram of the exploded structure of a battery cell in some embodiments of the present application;

[0037] Figure 4 This is a schematic diagram of the structure of a battery device in some embodiments of the present application;

[0038] Figure 5 Schematic diagram of electrical connection structure in some embodiments of the present application.

[0039] Vehicles 1000;

[0040] Battery device 100, controller 200, motor 300;

[0041] Box body 10, first part 11, second part 12;

[0042] Battery cell 20, end cover 21, housing 22, battery core assembly 23;

[0043] Electrical connection structure 30, electrical connection member 31, connection body 311, first connection sheet 3111, second connection sheet 3112, connection hole 3113, bending portion 3114, insulation layer 312, electromagnetic shielding layer 32, grounding assembly 33;

[0044] Relay 40;

[0045] Connector 50;

[0046] Current sensor 60 . DETAILED DESCRIPTION

[0047] The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0049] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces). The term "at least one" refers to one or more.

[0053] Electrical connectors are usually made of conductive metal materials. When current passes through the electrical connectors, a magnetic field is generated around them. As the overcurrent demand of the battery pack increases, the internal space becomes compact, causing the electrical connectors to be too close to precision devices such as current sensors. The magnetic field generated around the electrical connectors is also enhanced due to the large overcurrent, which affects the accuracy of the precision devices in the battery pack and further affects the battery performance.

[0054] Based on the above problems, a battery device is designed and disclosed, wherein the electrical connector is provided with an electromagnetic shielding layer.

[0055] In such a battery device, the electromagnetic shielding layer can guide, reflect or absorb the electromagnetic waves generated by the electrical connector, reducing the propagation of the electromagnetic waves, thereby reducing the impact of the electromagnetic waves on the accuracy of precision devices such as current sensors, and further reducing the problem of reduced accuracy of precision devices such as current sensors, resulting in inaccurate power estimation by the battery management system and reduced battery charging and discharging efficiency.

[0056] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. The battery device disclosed in the present application can also be used to form a power supply system of the electrical device.

[0057] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0058] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0059] Reference Figure 1 As shown, the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is arranged inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000.

[0060] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0061] In some embodiments of the present application, reference Figure 2 As shown, the battery device 100 may include a box body 10 and a battery cell 20, and the battery cell 20 is accommodated in the box body 10. The box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 may adopt a variety of structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0062] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0063] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0064] refer to Figure 3 As shown, the battery cell 20 refers to the smallest unit constituting the battery. The battery cell 20 includes an end cap 21, a housing 22, a battery cell assembly 23 and other functional components.

[0065] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength. Functional components such as electrode terminals can be provided on the end cap 21. The electrode terminal can be used to electrically connect to the battery cell assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection piece in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0066] The shell 22 is a component used to cooperate with the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the battery cell assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cover 21 at the opening. Without limitation, the end cover 21 and the shell 22 can also be integrated. Specifically, the end cover 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cover 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0067] The cell assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more cell assemblies 23 may be contained in the housing 22. The cell assembly 23 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the cell assembly 23, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear. The positive pole ear and the negative pole ear may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ears connect the electrode terminals to form a current loop.

[0068] Of course, in some other embodiments, the battery device 100 may also be integrated with the chassis / body.

[0069] According to some embodiments of the present application, the present application provides a battery device 100, referring to Figure 4 As shown, it includes an electrical connection structure 30, a relay 40 and a connector 50. The electrical connection structure 30 includes an electrical connector 31. The electrical connector 31 electrically connects the relay 40 and the connector 50. At least a portion of the surface of the electrical connector 31 is coated with an electromagnetic shielding layer 32. The electromagnetic shielding layer 32 is a conductive mesh sleeved on the electrical connector 31.

[0070] The relay 40 is an electronic switch, and the connector 50 is a structure for electrically connecting the battery device 100 to an external electrical device. The connector 50 and the relay 40 are electrically connected via the electrical connector 31. During the charging and discharging process of the battery device 100, the connection and disconnection between the battery device 100 and the external electrical device can be achieved by controlling the closing and opening of the relay 40, thereby achieving overcurrent, overvoltage and undervoltage protection.

[0071] The electromagnetic shielding layer 32 refers to a functional layer with an electromagnetic shielding effect. At least part of the surface of the electrical connector 31 is coated with the electromagnetic shielding layer 32, which means that the electromagnetic shielding layer 32 can cover the entire electrical connector 31, or the electromagnetic shielding layer 32 can be only provided on part of the surface of the electrical connector 31. The coverage area of ​​the electromagnetic shielding layer 32 can be selected according to the electromagnetic field strength generated by the electrical connector 31.

[0072] The conductive mesh refers to a mesh structure with a conductive function, and the conductive mesh is sleeved on the electrical connector 31 to make the conductive mesh a sleeve structure. The conductive mesh can achieve the effect of electromagnetic shielding by reflecting and absorbing electromagnetic waves. In addition, the mesh electromagnetic shielding layer 32 has a certain elasticity compared to the sheet structure. When used for the electrical connector 31 with a bend, the mesh electromagnetic shielding layer 32 is more conducive to being sleeved on the electrical connector 31.

[0073] The electromagnetic shielding layer 32 coated on the electrical connector 31 can guide, reflect or absorb the electromagnetic waves generated by the electrical connector 31, reducing the propagation of the electromagnetic waves, thereby reducing the impact of the electromagnetic waves on the accuracy of precision devices such as sensors, and further reducing the problem of reduced battery charging and discharging efficiency caused by inaccurate estimation of power by the battery management system due to reduced accuracy of precision devices such as sensors. Therefore, the present application can reduce the impact of large overcurrent connectors on the accuracy of precision devices, thereby improving battery performance.

[0074] According to some embodiments of the present application, the conductive mesh is selected from a metal conductive mesh, a metal composite material conductive mesh, and a conductive polymer material conductive mesh.

[0075] Metal conductive meshes, metal composite conductive meshes and conductive polymer material conductive meshes are all conductive. When electromagnetic waves reach the surface of the conductive mesh, due to the conductivity of the conductive mesh, an induced current will be generated on the surface of the conductive mesh. This induced current will generate an electromagnetic field opposite to the incident electromagnetic wave, thereby reflecting the incident electromagnetic wave back; in addition, part of the electromagnetic wave can enter the interior of the conductive mesh, where it will cause electron movement, thereby converting electromagnetic energy into heat energy and being consumed.

[0076] According to some embodiments of the present application, the metal conductive mesh includes an iron conductive mesh, a nickel conductive mesh and a copper conductive mesh; and / or, the metal composite material conductive mesh includes a ferrite conductive mesh, an iron-based nanocrystalline alloy conductive mesh, a nickel-based nanocrystalline alloy conductive mesh and a cobalt-based nanocrystalline alloy conductive mesh; and / or, the conductive polymer material conductive mesh includes a polyaniline conductive mesh, a polypyrrole conductive mesh, a polythiophene conductive mesh and a conductive polystyrene conductive mesh.

[0077] The iron conductive mesh and the nickel conductive mesh have high magnetic permeability, which can effectively guide the magnetic field lines through themselves, thereby reducing the outward propagation of electromagnetic waves. Although the magnetic permeability of the copper conductive mesh is lower than that of the iron conductive mesh and the nickel conductive mesh, the copper conductive mesh has good electrical conductivity and can offset the magnetic field generated by the electrical connector 31 by inducing eddy currents, thereby playing a certain shielding role.

[0078] Ferrite conductive mesh refers to a conductive mesh made of iron oxide and other metal oxides, which has a high magnetic permeability. Iron-based nanocrystalline alloy conductive mesh refers to a conductive mesh made of iron-based alloy with nano-scale grains. Iron-based nanocrystalline alloy conductive mesh has the characteristics of high magnetic permeability and low loss, and has a good guiding and shielding effect on the magnetic field. The same is true for nickel-based nanocrystalline alloy conductive mesh and cobalt-based nanocrystalline alloy conductive mesh.

[0079] Polyaniline conductive mesh refers to a conductive mesh made of conductive polyaniline, which has certain conductivity and electromagnetic shielding performance. The same is true for polypyrrole conductive mesh, polythiophene conductive mesh and conductive polystyrene conductive mesh.

[0080] In the embodiment of the present application, a corresponding conductive mesh can be selected according to the specific scenario.

[0081] According to some embodiments of the present application, the conductive mesh satisfies at least one of the following conditions: the conductive mesh is a single-layer or multi-layer structure; the thickness of the conductive mesh is 0.2mm-0.6mm; the mesh aperture of the conductive mesh is 0.8mm-1.5mm; the wire diameter of the conductive mesh is 0.01mm-0.05mm.

[0082] For example, the thickness of the conductive mesh can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm or 0.6mm; the mesh aperture of the conductive mesh can be 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm; the wire diameter of the conductive mesh can be 0.01mm, 0.02mm, 0.03mm, 0.04mm or 0.05mm. The multi-layer conductive mesh structure or the thicker conductive mesh can provide more reflection and absorption paths, and enhance the ability to block electromagnetic waves. In addition, the mesh aperture of the conductive mesh is small, which can effectively block the propagation of electromagnetic waves. When the mesh aperture is much smaller than the wavelength of the electromagnetic wave, the conductive mesh can more effectively block the propagation of electromagnetic waves.

[0083] According to some embodiments of the present application, referring to Figure 5 As shown, the electrical connection structure 30 further includes a grounding component 33. The grounding component 33 includes a grounding wire and a grounding terminal. The grounding wire is connected between the electromagnetic shielding layer 32 and the grounding terminal.

[0084] The grounding terminal is a terminal connected to the grounding body, which is used to reliably connect the electromagnetic shielding layer 32 to the grounding system. The grounding component 33 can promptly conduct the induced charge in the electromagnetic shielding layer 32 area, thereby reducing the secondary radiation generated by the charge accumulation, thereby improving the electromagnetic shielding effect.

[0085] According to some embodiments of the present application, further reference is made to Figure 5 As shown, the electrical connector 31 includes a connection body 311 and an insulating layer 312 arranged on the surface of the connection body 311 , and an electromagnetic shielding layer 32 is arranged on the surface of the insulating layer 312 .

[0086] The insulating layer 312 refers to a functional layer formed of an insulating material, and the insulating layer 312 may cover the entire surface of the connection body 311, or may be provided only on a portion of the surface of the connection body 311. The insulating layer 312 provided on the surface of the connection body 311 may prevent short circuit failure caused by contact with other metal parts or wires.

[0087] According to some embodiments of the present application, the insulating layer 312 is selected from at least one of an insulating coating layer, an insulating film, an insulating tape, and a sleeve.

[0088] The insulating coating layer can be formed by applying the insulating coating on the connection body 311 by spraying, brushing or dipping, etc., which can provide long-term insulation protection. The insulating coating can be epoxy powder, which is applied to the surface of the connection body 311 by electrostatic spraying.

[0089] The insulating film can be directly coated on the surface of the connection body 311 to form insulating protection. The insulating film can be a polyimide film (PI film), a polyester film (PET film) or a polytetrafluoroethylene film (PTEE film).

[0090] The insulating tape can be attached to the surface of the connection body 311, is soft and easy to operate, and can provide temporary or permanent insulation protection. The insulating tape can be a polyvinyl chloride (PVC) insulating tape or a rubber insulating tape.

[0091] The sleeve can be sleeved on the connection body 311. The sleeve can be a heat shrink sleeve, a cold shrink sleeve or a conventional sleeve. The heat shrink sleeve can be a cross-linked polyolefin sleeve, the cold shrink sleeve can be a silicone rubber sleeve, and the conventional sleeve can be an ethylene-vinyl acetate copolymer (EVA) sleeve. When the sleeve is a heat shrink sleeve or a cold shrink sleeve, the connection body 311 can be tightly wrapped to form a strong insulation layer 312.

[0092] According to some embodiments of the present application, continue to refer to Figure 5 As shown, the connection body 311 includes a first connection piece 3111 and a second connection piece 3112 that are connected to each other, and connection holes 3113 are provided on the first connection piece 3111 and the second connection piece 3112 .

[0093] The connection body 311 includes a first connection piece 3111 and a second connection piece 3112, that is, the connection body 311 is a flat structure as a whole, which is convenient for installation and fixing on the one hand, and can carry a larger current on the other hand. The first connection piece 3111 and the second connection piece 3112 are both provided with connection holes 3113. The connection holes 3113 located at the ends of the first connection piece 3111 and the second connection piece 3112 can be used to firmly connect the connection body 311 with the relay 40 and the connector 50 through fasteners such as bolts. The connection holes 3113 located at the junction of the first connection piece 3111 and the second connection piece 3112 can be used to further fix the connection body 311 through fasteners such as bolts, thereby improving the reliability of the connection.

[0094] According to some embodiments of the present application, the first connecting piece 3111 is extended along a first direction, the second connecting piece 3112 is extended along a second direction, and the first direction and the second direction intersect.

[0095] The intersection of the first direction and the second direction means that the first direction and the second direction can be distributed vertically or at other angles. The intersection of the first direction and the second direction makes the connecting body 311 as a whole L-shaped, which can better adapt to the complex and compact spatial layout inside the battery device 100, and can make full use of corners and edge spaces for setting, avoiding interference with other components.

[0096] According to some embodiments of the present application, the first connecting piece 3111 and the second connecting piece 3112 each have at least one bending portion 3114 bent in the thickness direction.

[0097] Reference Figure 5 As shown, bending in the thickness direction means that the first connecting piece 3111 and the second connecting piece 3112 are bent upward or downward to form a bending portion 3114. The connecting body 311 with the bending portion 3114 can better adapt to the compact space in the battery device 100 and avoid interference with other components.

[0098] According to some embodiments of the present application, an electromagnetic shielding layer 32 is disposed on both the first connecting sheet 3111 and the second connecting sheet 3112. Providing the electromagnetic shielding layer 32 on both the first connecting sheet 3111 and the second connecting sheet 3112 can further improve the electromagnetic shielding effect.

[0099] According to some embodiments of the present application, the connection body 311 is selected from one of a copper connection piece, an aluminum connection piece, and a copper-aluminum composite connection piece.

[0100] Copper connectors, aluminum connectors, and copper-aluminum composite connectors can be rigid connection structures or flexible connection structures, and this application does not impose specific restrictions. When copper connectors, aluminum connectors, and copper-aluminum composite connectors are rigid connection structures, they have high hardness and strength and can withstand large mechanical stresses; in addition, the cross-sectional shape and size of the rigid connection structure are relatively fixed, and its current carrying capacity is relatively stable and reliable. When copper connectors, aluminum connectors, and copper-aluminum composite connectors are flexible connection structures, they can be bent and twisted to a certain extent to adapt to electrical connections of different shapes and space requirements.

[0101] According to some embodiments of the present application, reference Figure 2 As shown, the battery device 100 includes a box body 10 on which a connector 50 is disposed; a high-voltage box (not shown) is also disposed inside the box body 10, and a relay 40 is disposed inside the high-voltage box.

[0102] The box body 10 may be provided with a connector 50 by passing the connector 50 through the box wall of the box body 10. The connector 50 is arranged on the box body 10, which can provide a fixed and easy-to-position interface for connection with an external electrical device.

[0103] The high-voltage box refers to a high-voltage distribution box, which is an intermediate hub for connecting the battery device 100 and the electrical device, and can manage and distribute the output high-voltage electric energy. Placing the relay 40 in the high-voltage box can effectively protect it and realize centralized control of the circuit connection between the battery device 100 and the external electrical device.

[0104] According to some embodiments of the present application, referring to Figure 4As shown, the battery device 100 further includes a current sensor 60 , and the distance between the current sensor 60 and the electrical connector 31 is 1.0 mm-3.2 mm.

[0105] The current sensor 60 is a device for detecting the current value in the battery device 100. It can monitor the current size and direction of the battery device 100 in real time during the charging and discharging process, help the battery management system (BMS) accurately determine the charging and discharging status of the battery, and prevent the battery from being overcharged or over-discharged; it can also calculate the charging and discharging amount of the battery device 100 by accurately measuring the current and combining the time parameters.

[0106] by Figure 4 For example, the current sensor 60 is mounted and fixed on the bottom plate of the battery device 100 and is arranged close to the electrical connector 31. This can improve the compactness of the battery device 100, thereby meeting higher current output requirements. The electromagnetic shielding layer 32 arranged on the electrical connector 31 can reduce the influence of the magnetic field of the electrical connector 31 on the accuracy of the current sensor 60 when the electrical connector 31 is arranged in close proximity to the current sensor 60.

[0107] According to some embodiments of the present application, reference Figure 4 As shown, the present application provides a battery device 100, including an electrical connection structure 30, a relay 40, a connector 50 and a current sensor 60. The electrical connection structure 30 includes an electrical connector 31, the electrical connector 31 electrically connects the relay 40 and the connector 50, and the electrical connector 31 is arranged near the current sensor 60. The electrical connector 31 is coated with an electromagnetic shielding layer 32. The electrical connector 31 includes a connection body 311 and an insulating layer 312 arranged on the surface of the connection body 311. The connecting body 311 is a copper connecting part, including a first connecting piece 3111 and a second connecting piece 3112 connected vertically, a connecting hole 3113 is provided at the junction of the first connecting piece 3111 and the second connecting piece 3112 and at the side of the first connecting piece 3111 and the second connecting piece 3112 away from the junction, two bending parts 3114 are provided on the first connecting piece 3111, and one bending part 3114 is provided on the second connecting piece 3112, and an insulating layer 312 is provided on the first connecting piece 3111 and the second connecting piece 3112. The insulating layer 312 is formed by insulating paint, specifically, by electrostatic spraying to coat epoxy powder on the surface of the first connecting piece 3111 and the second connecting piece 3112. The surface of the insulating layer 312 is coated with an electromagnetic shielding layer 32, which is an iron conductive mesh coated on the insulating layer 312, and a grounding wire and a grounding terminal are led out from one side of the electromagnetic shielding layer 32.

[0108] According to some embodiments of the present application, the present application also provides an electrical device, comprising any of the above-mentioned batteries.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Relay; Connectors; An electrical connection structure includes an electrical connection piece, wherein the electrical connection piece electrically connects the relay and the connector, and at least a portion of the surface of the electrical connection piece is covered with an electromagnetic shielding layer, wherein the electromagnetic shielding layer is a conductive mesh sleeved on the electrical connection piece.

2. The battery device according to claim 1, characterized in that The conductive mesh is selected from a metal conductive mesh, a metal composite material conductive mesh, and a conductive polymer material conductive mesh.

3. The battery device according to claim 2, characterized in that: The metal conductive mesh includes an iron conductive mesh, a nickel conductive mesh and a copper conductive mesh; and / or, The metal composite conductive mesh includes a ferrite conductive mesh, an iron-based nanocrystalline alloy conductive mesh, a nickel-based nanocrystalline alloy conductive mesh, and a cobalt-based nanocrystalline alloy conductive mesh; and / or, The conductive polymer material conductive net includes a polyaniline conductive net, a polypyrrole conductive net, a polythiophene conductive net and a conductive polystyrene conductive net.

4. The battery device according to any one of claims 1 to 3, characterized in that: The conductive mesh satisfies at least one of the following conditions: The conductive mesh is a single-layer or multi-layer structure; The thickness of the conductive mesh is 0.2mm-0.6mm; The mesh size of the conductive mesh is 0.8mm-1.5mm; The wire diameter of the conductive mesh is 0.01mm-0.05mm.

5. The battery device according to claim 1, wherein: The electrical connection structure further includes a grounding component, wherein the grounding component includes a grounding wire and a grounding terminal, and the grounding wire is connected between the electromagnetic shielding layer and the grounding terminal.

6. The battery device according to claim 1, wherein: The electrical connector comprises a connecting body and an insulating layer arranged on the surface of the connecting body, and the electromagnetic shielding layer is arranged on the surface of the insulating layer.

7. The battery device according to claim 6, characterized in that: The insulating layer is selected from one of an insulating coating layer, an insulating film, an insulating tape, and a sleeve.

8. The battery device according to claim 6, characterized in that: The connecting body comprises a first connecting piece and a second connecting piece connected to each other, and the first connecting piece and the second connecting piece are both provided with connecting holes.

9. The battery device according to claim 8, characterized in that: The first connecting piece is extended along a first direction, the second connecting piece is extended along a second direction, and the first direction and the second direction intersect.

10. The battery device according to claim 8, characterized in that The first connecting piece and the second connecting piece each have at least one bent portion bent in a thickness direction.

11. The battery device according to claim 8, characterized in that: The electromagnetic shielding layer is disposed on both the first connecting sheet and the second connecting sheet.

12. The battery device according to any one of claims 6 to 11, characterized in that: The connecting body is selected from one of a copper connecting piece, an aluminum connecting piece, and a copper-aluminum composite connecting piece.

13. The battery device according to claim 1, wherein: The battery device comprises a box body, and the connector is provided on the box body; A high voltage box is also provided in the box body, and the relay is provided in the high voltage box.

14. The battery device according to claim 1, wherein: The battery device further comprises a current sensor, and the distance between the current sensor and the electrical connector is 1.0 mm-3.2 mm.

15. An electrical device, characterized in that: A battery device comprising any one of claims 1 to 14.

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