Battery device and electric appliance

Abstract

The application belongs to the technical field of battery equipment, and particularly relates to a battery device and an electric equipment. The battery device comprises at least one battery monomer and a relay electrically connected with the battery monomer. The relay comprises a shell and a relay body. At least part of the structure of the relay body is arranged in the interior of the shell. The relay body comprises a coil assembly, a magnet assembly and at least one static contact. The coil assembly comprises a coil capable of generating a magnetic field after being electrified. The magnet assembly comprises a first shell and a conductive part arranged in the first shell. The conductive part is configured to be driven under the action of the magnetic field in the electrified state of the coil. The first shell is provided with a first mounting hole. At least one mounting part is arranged on the surface of the first shell. At least part of the structure of the static contact passes through the first mounting hole and is connected with the mounting part. The static contact is configured to be electrically connected with the conductive part. According to the battery device, the fixing effect of the static contact in the relay can be improved.

Description

Technical Field

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

[0002] Relays are used to control the on / off state of the high-voltage circuit in electric vehicles. After the relay is energized, current is conducted through the relay's stationary and moving contacts. Currently, the stationary contacts are typically fixed to the relay by welding. When the stationary contacts are connected to external conductive components and subjected to stress, the weld can easily loosen, affecting the fixation of the stationary contacts and even causing them to shift and lose electrical connection with the moving contacts. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the purpose of this application is to provide a battery device and electrical equipment that can effectively solve the problem of poor fixation of static contacts in relays.

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

[0005] At least one battery cell;

[0006] The relay is electrically connected to a single battery cell;

[0007] The relay includes a housing and a relay body, with at least a portion of the relay body located inside the housing. The relay body includes:

[0008] A coil assembly, comprising a coil that generates a magnetic field when energized;

[0009] A magnet assembly includes a first housing and a conductive element disposed within the first housing. The conductive element is configured to be driven by a magnetic field when the coil is energized. The first housing has a first mounting hole extending through it, and at least one mounting portion protrudes from the surface of the first housing.

[0010] At least one stationary contact, at least a portion of the structure of which passes through a first mounting hole and is connected to a mounting portion, the stationary contact being configured to be electrically connected to a conductive element.

[0011] According to the battery device of this application, the mounting part protrudes from the surface of the first housing, and the stationary contact is connected to the first housing through the mounting part, thereby extending the connection size between the stationary contact and other components, thereby improving the fixing effect of the stationary contact in the relay and reducing the displacement of the stationary contact during use.

[0012] In some embodiments of this application, the mounting portion protrudes from the inner surface of the first housing, and at least a portion of the structure of the stationary contact is inserted into the interior of the first housing and connected to the mounting portion.

[0013] By protruding the mounting portion onto the inner surface of the first housing, the space occupied by the mounting portion on the outside of the first housing can be reduced, thereby reducing the size of the magnet assembly and, consequently, the size of the relay.

[0014] In some embodiments of this application, the mounting portion is provided with a first threaded hole, and along the axial direction of the coil, the projection range of the first mounting hole and the projection range of the first threaded hole at least partially overlap, and at least a portion of the structure of the stationary contact passes through the first mounting hole and is threadedly connected to the first threaded hole.

[0015] By inserting the stationary contact into the interior of the first housing and threading it into the first threaded hole, the stationary contact can be easily disassembled and installed, and the connection strength between the stationary contact and the mounting part can be effectively improved.

[0016] In some embodiments of this application, the outer surface of the stationary contact protrudes with a fixing part along the direction intersecting with the axial direction of the coil. The fixing part is located outside the first housing and abuts against the first housing.

[0017] By providing a fixing part, the fixing part can abut against the outer surface of the first housing, thereby increasing the frictional force when the stationary contact rotates relative to the first housing, and thus improving the fixing effect of the stationary contact on the first housing. At the same time, the mounting part and the fixing part are located on the inner and outer sides of the first housing respectively, forming a double-step structure, which further improves the fixing effect of the stationary contact on the first housing.

[0018] In some embodiments of this application, at least some of the stationary contacts are located outside the first housing, and a connecting hole is provided through them in a direction intersecting the axial direction of the coil.

[0019] By placing at least some of the stationary contacts outside the first housing, it is convenient for the stationary contacts to be electrically connected to the external conductive components. At the same time, the stationary contacts are provided with a connection hole through the coil in the direction intersecting the coil axis, so that the external conductive components can be electrically connected to the stationary contacts in the direction intersecting the coil axis, thereby reducing the space occupied by the external conductive components along the coil axis.

[0020] In some embodiments of this application, the mounting part and the first housing are an integral structure, or the mounting part is fixedly connected to the first housing.

[0021] By making the mounting part and the first housing an integral structure, the connection strength between the mounting part and the first housing can be improved. By fixing the mounting part to the first housing, it is convenient to process the mounting part separately, and then fix the processed mounting part to the first housing, thereby facilitating the connection of the stationary contact to the first housing through the mounting part.

[0022] In some embodiments of this application, at least one stationary contact includes a first stationary contact and a second stationary contact, the first stationary contact and the second stationary contact are spaced apart along a first direction, and the conductive element is configured to be electrically connected to the first stationary contact and the second stationary contact respectively, the first direction intersecting the axial direction of the coil.

[0023] By electrically connecting the conductive element to the first stationary contact and the second stationary contact respectively, one of the first stationary contact and the second stationary contact can be used as a circuit input terminal, and the other can be used as a circuit output terminal, thereby forming a conductive circuit through the conductive element, the first stationary contact and the second stationary contact.

[0024] In some embodiments of this application, the conductive element has a first position when the coil is not energized, and the conductive element also has a second position away from the coil under the influence of the magnetic field when the coil is energized. When the conductive element is in the second position, the conductive element is electrically connected to the first stationary contact and the second stationary contact, respectively.

[0025] When the coil is energized, the conductive component can be driven to the second position under the action of the coil's magnetic field, and used to conductively connect the first stationary contact and the second stationary contact, thereby forming a conductive circuit through the conductive component, the first stationary contact, and the second stationary contact.

[0026] In some embodiments of this application, at least one mounting part includes two mounting parts, which are spaced apart along a first direction and are respectively located inside the first housing. At least a portion of the first stationary contact and at least a portion of the second stationary contact are respectively inserted into the inside of the first housing and are connected to the two mounting parts one by one.

[0027] By connecting the first stationary contact and the second stationary contact to the mounting part respectively, the fixing effect of the first stationary contact and the second stationary contact can be improved.

[0028] In some embodiments of this application, the first housing includes a ceramic housing.

[0029] By placing the conductive element inside the ceramic housing, the ceramic housing can effectively isolate the conductive element from the electric arc generated when the stationary contact is broken, reducing the risk of the electric arc breaking down the ceramic housing and damaging other components inside the relay.

[0030] In some embodiments of this application, the magnet assembly further includes at least one magnet disposed outside the first housing, and the magnetic field direction of the magnet is perpendicular to the axis of the coil.

[0031] By placing the magnet outside the first housing, when the conductive element breaks with the stationary contact and generates an electric arc, the magnet can generate a magnetic field in a direction perpendicular to the coil axis. The electric arc current interacts with the magnetic field to generate a force that pushes the electric arc to move outward and cool it out, thereby achieving the purpose of magnetic blowout arc extinguishing.

[0032] In some embodiments of this application, the coil assembly further includes a second housing, which is disposed inside the outer casing, and the coil is disposed inside the second housing.

[0033] By placing the second housing inside the outer casing and the coil inside the second housing, the coil can be placed inside the second housing to form a coil assembly during assembly, and then the coil assembly can be assembled inside the outer casing, thus facilitating the modular assembly of the relay.

[0034] In some embodiments of this application, the conductive element includes an armature that is conductive.

[0035] The armature is magnetic and can be driven by the magnetic field generated by the energized coil. At the same time, the armature is also conductive, so that the circuit can be connected through the conductive component.

[0036] In some embodiments of this application, the relay includes multiple relay bodies, and the coil assemblies and magnet assemblies of the multiple relay bodies are respectively disposed inside the same housing.

[0037] By housing multiple relay bodies together inside the same housing, the extra space occupied by each relay body in its own housing can be reduced, thereby reducing the space occupancy rate of the relays and improving their integration, making overall assembly easier.

[0038] In some embodiments of this application, the conductive element of any relay body extends along a first direction, and multiple relay bodies are arranged side by side along the first direction, wherein the first direction is perpendicular to the axis of the coil.

[0039] By arranging multiple relay bodies side by side along the first direction, the space occupancy rate of the relays along the first direction can be increased.

[0040] In some embodiments of this application, the plurality of relay bodies include at least a first relay body and a second relay body arranged adjacent to each other. The relay also includes a conductive connector, and one of the stationary contacts of the first relay body is electrically connected to one of the stationary contacts of the second relay body through the conductive connector.

[0041] By electrically connecting the stationary contacts of two relay bodies through conductive connectors, the stability and torsional resistance of the two connected stationary contacts can be improved, thereby reducing the deformation or displacement of the stationary contacts when they are electrically connected to external conductive parts.

[0042] In some embodiments of this application, at least one stationary contact includes a first stationary contact and a second stationary contact. The first stationary contact of the first relay body is located on the side of the second stationary contact of the first relay body close to the second relay body. The first stationary contact of the second relay body is located on the side of the second stationary contact of the second relay body close to the first relay body. The first stationary contact of the first relay body is electrically connected to the first stationary contact of the second relay body through a conductive connector.

[0043] By electrically connecting the two first stationary contacts of two adjacent relay bodies through a conductive connector, the stability and torsional resistance of the two first stationary contacts can be improved, and the size of the conductive connector can be reduced.

[0044] In some embodiments of this application, along the axial direction of the coil, the size of the second stationary contact located outside the first housing is larger than the size of the first stationary contact located outside the first housing; and / or, along the direction perpendicular to the axial direction of the coil, the size of the end of the second stationary contact away from the first housing is larger than the size of the end of the first stationary contact away from the first housing.

[0045] By making the second stationary contact, located outside the first housing, larger than the first stationary contact along the coil's axial direction, the second stationary contact has sufficient dimensions to connect with external conductive components. Similarly, by making the end of the second stationary contact facing away from the first housing larger than the end of the first stationary contact facing away from the first housing along a direction perpendicular to the coil's axial direction, the second stationary contact can easily connect to external conductive components and has sufficient supporting strength, reducing the likelihood of bending.

[0046] In some embodiments of this application, one of the stationary contacts of the first relay body is welded to a conductive connector, and / or, one of the stationary contacts of the second relay body is welded to a conductive connector.

[0047] Connecting one of the stationary contacts of the first relay body to the conductive connector by welding improves the fixation effect between the stationary contact and the conductive connector in the first relay body. Similarly, connecting one of the stationary contacts of the second relay body to the conductive connector by welding improves the fixation effect between the stationary contact and the conductive connector in the second relay body.

[0048] In some embodiments of this application, the conductive connector includes a conductive plate and a connecting post. One of the stationary contacts of the first relay body is electrically connected to one of the stationary contacts of the second relay body through the conductive plate. The connecting post is disposed on the conductive plate and electrically connected to the conductive plate. The connecting post is configured to be electrically connected to an external conductive component.

[0049] By connecting the stationary contacts in the first relay body and the second relay body through a conductive plate, the connection stability and torsional resistance of the stationary contacts in the first relay body and the second relay body can be improved. Furthermore, the conductive plate is provided with connecting posts, which facilitate electrical connection with external conductive components, thereby connecting the stationary contacts and external conductive components through conductive connectors.

[0050] In some embodiments of this application, the conductive plate includes a first plate portion and a second plate portion. The first plate portion intersects the axial direction of the coil and is electrically connected to the stationary contact. The second plate portion is arranged at an angle to the first plate portion, and a connecting post is provided on the plate surface of the second plate portion.

[0051] By setting the first plate and the second plate at an angle, with the first plate electrically connected to the stationary contact and the connecting post located on the surface of the second plate, the position and extension direction of the connecting post can be easily adjusted, thereby facilitating the electrical connection between the connecting post and the external conductive component.

[0052] In some embodiments of this application, the second plate portion is disposed on one side of the first plate portion along the second direction, and the connecting post is disposed on the side of the second plate portion facing the first plate portion along the second direction and extends along the second direction, wherein the first direction, the second direction and the axis of the coil are perpendicular to each other.

[0053] By placing the connecting post on one side of the second plate along the second direction and extending it along the second direction, the space occupancy rate of the connecting post along the first direction and the axial direction of the coil can be increased, and the space occupancy rate of the connecting post along the second direction can be improved, and it is convenient for the connecting post to be electrically connected to the external conductive component along the second direction.

[0054] In some embodiments of this application, at least one stationary contact includes a first stationary contact and a second stationary contact, and the first stationary contact of the first relay body and the first stationary contact of the second relay body are electrically connected through a first plate.

[0055] Wherein, the second stationary contact of the first relay body is provided with a connecting hole through the second stationary contact in the direction intersecting with the axial direction of the coil, and / or, the second stationary contact of the second relay body is provided with a connecting hole through the second stationary contact in the direction intersecting with the axial direction of the coil.

[0056] By providing a connecting hole through the second stationary contact in the direction intersecting with the coil's axis, it is convenient to connect the second stationary contact to an external conductive component in the direction intersecting with the coil's axis, thereby reducing the space occupied by the external conductive component along the coil's axis.

[0057] In some embodiments of this application, the conductive plate is a straight plate that intersects the axis of the coil, and at least some of the connecting posts are located on the side of the conductive plate away from the magnet assembly.

[0058] By placing the connecting post on the side of the conductive plate away from the magnet assembly, it is easy for the connecting post to be connected to the external conductive component along the axial direction of the coil.

[0059] Secondly, this application proposes an electrical device including any of the battery devices described above.

[0060] 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

[0061] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0062] Figure 1 This is a structural schematic diagram of a vehicle provided in one embodiment of this application;

[0063] Figure 2 This is a schematic diagram of the structure of a battery device provided in one embodiment of this application;

[0064] Figure 3 This is a schematic diagram of the structure of a battery cell assembly provided in one embodiment of this application;

[0065] Figure 4 This is an exploded structural diagram of a battery cell provided in one embodiment of this application;

[0066] Figure 5 This is a schematic diagram of the structure of a relay provided in one embodiment of this application;

[0067] Figure 6 yes Figure 5 A schematic diagram of the relay after removing its casing;

[0068] Figure 7 yes Figure 5 A schematic diagram of the exploded structure of the relay in the diagram;

[0069] Figure 8 yes Figure 5 Side view of the relay in the image;

[0070] Figure 9 yes Figure 8 A schematic diagram of the AA cross-sectional structure of the relay in the diagram;

[0071] Figure 10This is a schematic diagram of the structure of a relay provided in one embodiment of this application;

[0072] Figure 11 yes Figure 10 A schematic diagram of the relay after removing its casing;

[0073] Figure 12 yes Figure 10 A schematic diagram of the exploded structure of the relay in the diagram;

[0074] Figure 13 yes Figure 10 Side view of the relay in the image;

[0075] Figure 14 yes Figure 13 A schematic diagram of the BB cross-sectional structure of the relay in the diagram.

[0076] The reference numerals in the detailed embodiments are as follows:

[0077] 1. Vehicles;

[0078] 10. Battery assembly; 11. Controller; 12. Motor;

[0079] 20. Battery cell assembly; 21. Battery cell; 211. End cap; 212. Battery casing; 213. Electrode assembly; 214. Electrode terminal;

[0080] 30. Box; 301. First box; 302. Second box;

[0081] 40. Relay; 401. Relay body; 4011. First relay body; 4012. Second relay body;

[0082] 41. Outer casing; 411. Support boss; 412. Coil connection port;

[0083] 42. Coil assembly; 421. Coil; 422. Second housing; 4221. Second through hole;

[0084] 43. Magnet assembly; 431. Conductive component; 432. First housing; 4321. Body part; 4322. Sealing plate; 4323. First mounting hole; 4324. First through hole; 433. Mounting part; 434. Magnet; 435. Support plate;

[0085] 441. First stationary contact; 442. Second stationary contact; 4421. Connecting hole; 443. Fixing part;

[0086] 45. Conductive connector; 451. Conductive plate; 4511. First plate portion; 4512. Second plate portion; 452. Connecting post;

[0087] X, coil axis; Y, first direction; Z, second direction. Detailed Implementation

[0088] 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.

[0089] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0090] 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", "circumferential" and other terms indicating the orientation or positional relationship are 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 are not intended to 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.

[0091] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of embodiments of this application, "a plurality of" means including two or more, unless otherwise explicitly defined.

[0092] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the 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.

[0093] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0094] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. Lithium-ion batteries, due to their high energy density, high average open-circuit voltage, and long cycle life, are widely used in mobile and portable electronic devices.

[0095] Relays are used to control the on / off state of the high-voltage circuit in electric vehicles. After the relay is energized, current is conducted through the relay's stationary and moving contacts. Currently, the stationary contacts are typically fixed to the relay by welding. When the stationary contacts are connected to external conductive components and subjected to stress, the weld can easily loosen, affecting the fixation of the stationary contacts and even causing them to shift and lose electrical connection with the moving contacts.

[0096] To address the problem of poor fixation of stationary contacts in relays, this application proposes a battery device and an electrical device having the battery device. According to the battery device and electrical device of this application, the connection between the stationary contact and other components can be extended, thereby improving the fixation effect of the stationary contact in the relay and reducing the displacement of the stationary contact during use.

[0097] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0098] In some implementations, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0099] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0100] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0101] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0102] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0103] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0104] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0105] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0106] In some embodiments, the energy storage device includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery modules 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.

[0107] 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 can be any power system that requires energy storage devices.

[0108] The technical solutions described in this application are applicable to various electrical devices and energy storage devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, spacecraft and energy storage containers, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0109] Figure 1 This is a structural schematic diagram of vehicle 1 provided for some embodiments of this application. For example... Figure 1 As shown, vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 10 is installed inside vehicle 1, and the battery device 10 can be located at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1; for example, the battery device 10 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 11 and a motor 12. The controller 11 is used to control the battery device 10 to supply power to the motor 12, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0110] In some embodiments of this application, the battery device 10 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0111] Figure 2 This is a schematic diagram of the structure of a battery device 10 according to an embodiment of this application. Figure 3 This is a schematic diagram of the structure of a battery cell assembly 20 according to one embodiment of this application. (In conjunction with...) Figure 2 and Figure 3 As shown, to meet different power demands, the battery device 10 may include multiple battery cells 21, where each battery cell 21 is the smallest unit constituting the battery device 10. Multiple battery cells 21 can be connected in series and / or in parallel via electrode terminals for various applications. Furthermore, the multiple battery cells 21 can be connected in series, in parallel, or in a mixed configuration, where a mixed configuration refers to a combination of series and parallel connections.

[0112] Combination Figure 2 and Figure 3 As shown, the battery device 10 may include multiple battery cell assemblies 20 and a housing 30, with the multiple battery cell assemblies 20 housed inside the housing 30. The housing 30 is used to house the battery cells 21 or battery cell assemblies 20 to reduce the impact of liquids or other foreign objects on the charging or discharging of the battery cells 21. The housing 30 may be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the housing 30 may be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0113] In some embodiments, the housing 30 may include a first housing 301 and a second housing 302, which overlap each other, and together define a space for accommodating the battery cell 21. The second housing 302 may be a hollow structure with one end open, and the first housing 301 may be a plate-like structure, with the first housing 301 covering the open side of the second housing 302 so that the first housing 301 and the second housing 302 together define a space for accommodating the battery cell 21; alternatively, the first housing 301 and the second housing 302 may both be hollow structures with one side open, with the open side of the first housing 301 covering the open side of the second housing 302.

[0114] The battery cell assembly 20 may include multiple battery cells 21. These battery cells 21 may be connected in series, parallel, or a combination thereof to form the battery cell assembly 20. The multiple battery cell assemblies 20 may then be connected in series, parallel, or a combination thereof to form the battery device 10. The battery cell 21 may be cylindrical, flat, cuboid, or other shapes, and this application does not limit this. Battery cells 21 are generally classified into three types according to their packaging method: cylindrical battery cells, cuboid battery cells, and pouch battery cells, and this application does not limit this either. However, for the sake of brevity, the following embodiments will use a cuboid lithium-ion battery cell 21 as an example for explanation.

[0115] Figure 4 This is an exploded structural diagram of a battery cell 21 provided for some embodiments of this application. The battery cell 21 refers to the smallest unit constituting the battery device 10. For example... Figure 4 The battery cell 21 includes an end cap 211, a battery casing 212, and an electrode assembly 213.

[0116] End cap 211 refers to a component that covers the opening of battery housing 212 to isolate the internal environment of battery cell 21 from the external environment. The shape of end cap 211 can be adapted to the shape of battery housing 212 to fit it. Optionally, end cap 211 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 211 is not easily deformed under pressure and impact, giving battery cell 21 higher structural strength and improved safety performance. Functional components such as electrode terminals 214 can be provided on end cap 211. Electrode terminals 214 can be used for electrical connection with electrode assembly 213 to output or input electrical energy to battery cell 21. In some embodiments, end cap 211 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 21 reaches a threshold. In some embodiments, an insulating element may be provided on the inner side of the end cap 211. The insulating element can be used to isolate the electrical connection components inside the battery housing 212 from the end cap 211 to reduce the risk of short circuit. For example, the insulating element may be made of plastic, rubber, etc.

[0117] The battery housing 212 is an assembly used to cooperate with the end cap 211 to form the internal environment of the battery cell 21. This internal environment can accommodate the electrode assembly 213, electrolyte (not shown in the figure), and other components. The battery housing 212 and the end cap 211 can be independent components. An opening can be provided on the battery housing 212, and the end cap 211 can be used to close the opening to form the internal environment of the battery cell 21. Alternatively, the end cap 211 and the battery housing 212 can be integrated. Specifically, the end cap 211 and the battery housing 212 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the battery housing 212, the end cap 211 closes the battery housing 212. The battery housing 212 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the battery housing 212 can be determined according to the specific shape and size of the electrode assembly 213. The battery casing 212 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0118] Electrode assembly 213 is the component in the battery cell 21 where the electrochemical reaction occurs. The battery casing 212 may contain one or more electrode assemblies 213. Electrode assembly 213 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of electrode assembly 213, while the portions of the positive and negative electrode sheets without active material each constitute tabs (not shown in the figure). The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 214 to form a current loop.

[0119] Combination Figure 2 , Figures 5 to 9 As shown, the first aspect of this application proposes a battery device 10. In some embodiments of this application, the battery device 10 includes at least one battery cell 21 and a relay 40 electrically connected to the battery cell 21. The relay 40 includes a housing 41 and a relay body 401. At least a portion of the relay body 401 is disposed inside the housing 41. The relay body 401 includes a coil assembly 42, a magnet assembly 43, and at least one stationary contact. The coil assembly 42 includes a coil 421 that generates a magnetic field when energized. The magnet assembly 43 includes a first housing 432 and a conductive element 431 disposed within the first housing 432. The conductive element 431 is configured to be driven by the magnetic field of the energized coil 421. The first housing 432 has a first mounting hole 4323 extending through it. At least one mounting portion 433 protrudes from the surface of the first housing 432. At least a portion of the stationary contact passes through the first mounting hole 4323 and is connected to the mounting portion 433. The stationary contact is configured to be electrically connected to the conductive element 431.

[0120] Specifically, there can be multiple battery cells 21, forming a battery cell assembly 20. At least one battery cell 21 is electrically connected to a relay 40, thereby increasing the output voltage or output current of the battery device 10. Optionally, the relay 40 can be located inside the housing 30 and directly connected to the battery cell 21 via an external conductive element, such as a conductive pad. Alternatively, the relay 40 can be located inside the housing 30 and electrically connected to the battery cell 21 via a fuse.

[0121] The housing 41 forms the overall external structure of the relay 40, and its interior has a cavity for accommodating the coil assembly 42 and the magnet assembly 43. The coil assembly 42 and the magnet assembly 43 are respectively disposed inside the housing 41 and are mounted and protected by the housing 41. At least one coil connection port 412 is provided through the housing, through which a connecting wire can pass. The two ends of the connecting wire are electrically connected to the battery cell 21 and the coil 421, respectively, thereby supplying power to the coil 421 and causing the coil 421, which is in the energized state, to generate a magnetic force acting on the conductive element 431, thereby driving the conductive element 431 to move.

[0122] The coil assembly 42 includes at least a coil 421, which has an axial direction, hereinafter referred to as the coil axis X. When energized, the coil 421 generates a magnetic field along its own axial direction, thereby driving the conductive element 431 to move along the coil axis X. In this application, the conductive element 431 can move away from the coil 421 under the influence of the coil's magnetic field.

[0123] The magnet assembly 43 includes a first housing 432 containing a conductive element 431. A portion of the structure within the first housing 432 is magnetic, with the magnetic direction opposite to the magnetic field generated by the coil 421 when energized. The magnetic element is driven by the magnetic field of the coil 421, thus moving away from the coil 421. Optionally, the conductive element 431 is magnetic, thus being directly driven by the magnetic force of the coil 421. Alternatively, the conductive element 431 is non-magnetic, and this non-magnetic conductive element 431 is connected to a magnetic element within the magnet assembly 43. The magnetic element is directly driven by the magnetic force of the coil 421, causing the conductive element 431 to move together. For ease of description, this application only describes the case where the conductive element 431 is magnetic and can be directly driven by the magnetic force of the coil 421. The mounting portion 433 protrudes from the inner or outer surface of the first housing 432. The stationary contact is connected to the mounting portion 433, thereby being fixedly connected to the first housing 432 via the mounting portion 433. Because the mounting portion 433 protrudes from the surface of the first housing 432, the dimension of the stationary contact in the fixing direction to the first housing 432 can be extended by increasing the dimension of the mounting portion 433 protruding from the surface of the first housing 432. The first housing 432 has a through-hole 4323 through which a portion of the structure of the stationary contact can pass and be connected to the mounting portion 433, including by snap-fit, bonding, welding, or threaded connection. Optionally, the first mounting hole 4323 can be a smooth hole.

[0124] The stationary contact is conductive and can be electrically connected to an external power source, such as a battery cell 21, as a circuit input terminal, or it can be electrically connected to an external electrical device as a circuit output terminal, thereby completing the circuit conduction through the relay 40. Optionally, at least one stationary contact includes at least a first stationary contact 441, and at least one stationary contact may also include a second stationary contact 442, wherein one of the first stationary contact 441 and the second stationary contact 442 can serve as a circuit input terminal, and the other of the first stationary contact 441 and the second stationary contact 442 can serve as a circuit output terminal. For ease of description, this application only describes the example of the first stationary contact 441 being connected to the first housing 432 via the mounting part 433. The second stationary contact 442 can also be connected to the first housing 432 via the mounting part 433, or the second stationary contact 442 can be directly connected to the first housing 432.

[0125] According to the battery device 10 of this application, the mounting part 433 protrudes from the surface of the first housing 432, and the stationary contact is connected to the first housing 432 through the mounting part 433, thereby extending the connection size between the stationary contact and other components, thereby improving the fixing effect of the stationary contact in the relay 40 and reducing the displacement of the stationary contact during use.

[0126] Combination Figures 5 to 9 As shown, in some embodiments of this application, the mounting portion 433 protrudes from the inner surface of the first housing 432, and at least a portion of the structure of the stationary contact is inserted into the interior of the first housing 432 and connected to the mounting portion 433.

[0127] Specifically, the mounting portion 433 can be disposed inside the first housing 432 and connected to the inner surface of the first housing 432, such as by bonding, welding, or snapping, so that the mounting portion 433 protrudes from the inner surface of the first housing 432. The first stationary contact 441 is inserted into the interior of the first housing 432 and connected to the mounting portion 433, thereby connecting the first stationary contact 441 to the first housing 432 through the mounting portion 433. Optionally, the mounting portion 433 can be offset from the first mounting hole 4323 along the coil axis X, with one end of the first stationary contact 441 passing through the first mounting hole 4323 and inserted into the interior of the first housing 432, and can be connected to the outer surface of the mounting portion 433 by bonding, snapping, or welding. Alternatively, a second mounting hole is provided through the mounting portion 433 along the coil axis X, with one end of the first stationary contact 441 passing through the first mounting hole 4323 and inserted into the interior of the second mounting hole, thereby bonding, snapping, or welding to the inner wall surface of the second mounting hole. Alternatively, the second mounting hole may have an internal thread, and the end of the first stationary contact 441 may have an external thread, thereby achieving a threaded connection between the first stationary contact 441 and the mounting part 433.

[0128] By protruding the mounting portion 433 onto the inner surface of the first housing 432, the space occupied by the mounting portion 433 on the outside of the first housing 432 can be reduced, thereby reducing the size of the magnet assembly 43 and, consequently, the size of the relay 40.

[0129] Combination Figures 5 to 9 As shown, in some embodiments of this application, the mounting part 433 is provided with a first threaded hole through it. Along the axial direction of the coil 421, the projection range of the first mounting hole 4323 and the projection range of the first threaded hole at least partially overlap. At least a part of the structure of the stationary contact passes through the first mounting hole 4323 and is threadedly connected to the first threaded hole.

[0130] Specifically, the first housing 432 has a first mounting hole 4323 through which the mounting part 433 is connected, and the mounting part 433 has a first threaded hole through which the first mounting hole 4323 is connected. Along the coil axis X, the projection of the first mounting hole 4323 and the projection of the first threaded hole at least partially coincide. Optionally, the first mounting hole 4323 and the first threaded hole are coaxially arranged. The radial dimension of the first mounting hole 4323 is larger than the radial dimension of the first threaded hole, and the radial dimension of the first mounting hole 4323 is smaller than the radial dimension of the mounting part 433. This facilitates the first stationary contact 441 to pass sequentially from the outside of the first housing 432 through the first mounting hole 4323 and the first threaded hole, and to be threadedly connected to the first threaded hole. Alternatively, the first mounting hole 4323 and the first threaded hole are coaxially arranged, with the radial dimension of the first mounting hole 4323 being smaller than that of the first threaded hole, and the radial dimension of the first mounting hole 4323 being smaller than that of the mounting portion 433. This facilitates the first stationary contact 441 to pass sequentially through the first threaded hole and the first mounting hole 4323 from the inside of the first housing 432, and to be threadedly connected to the first threaded hole. Alternatively, the first mounting hole 4323 and the first threaded hole are not coaxially arranged, but they have an overlapping area along the coil axis X. The first stationary contact 441 can pass sequentially through the first mounting hole 4323 and the first threaded hole, and to be threadedly connected to the first threaded hole.

[0131] By inserting the stationary contact into the interior of the first housing 432 and threading it into the first threaded hole, the stationary contact can be easily disassembled and installed, and the connection strength between the stationary contact and the mounting part 433 can be effectively improved.

[0132] Combination Figures 5 to 9 As shown, in some embodiments of this application, the outer surface of the stationary contact protrudes along the direction intersecting with the axial direction of the coil 421 and is provided with a fixing part 443. The fixing part 443 is located outside the first housing 432 and abuts against the first housing 432.

[0133] Specifically, a portion of the first stationary contact 441 is inserted into the interior of the first housing 432 and threadedly connected to the mounting portion 433. Another portion of the first stationary contact 441 is located on the exterior of the first housing 432, facilitating electrical connection with external conductive components. The outer surface of the first stationary contact 441 located on the exterior of the first housing 432 has a protruding fixing portion 443. When the first stationary contact 441 is threadedly connected to the mounting portion 433 to a certain size, the fixing portion 443 can abut against the outer surface of the first housing 432, thereby limiting the size of the first stationary contact 441 inserted into the interior of the first housing 432 and increasing the friction between the fixing portion 443 and the first housing 432, reducing the possibility of loosening between the first stationary contact 441 and the first housing 432. Optionally, the first stationary contact 441 has a cylindrical outer surface, and the fixing portion 443 is circumferentially disposed on the annular outer surface of the first stationary contact 441.

[0134] Optionally, to improve the connection strength between the first stationary contact 441 and the first housing 432, the fixing part 443 can be welded to the outer surface of the first housing 432, thereby improving the welding dimensions between the first stationary contact 441 and the first housing 432 through the fixing part 443.

[0135] By providing the fixing part 443, the fixing part 443 can abut against the outer surface of the first housing 432, thereby increasing the frictional force when the stationary contact rotates relative to the first housing 432, and thus improving the fixing effect of the stationary contact on the first housing 432. At the same time, the mounting part 433 and the fixing part 443 are located on the inner and outer sides of the first housing 432 respectively, forming a double-step structure, which further improves the fixing effect of the stationary contact on the first housing 432.

[0136] Combination Figures 5 to 9 As shown, in some embodiments of this application, at least some static contacts are located outside the first housing 432, and a connecting hole 4421 is provided through it in a direction intersecting the axial direction of the coil 421.

[0137] Specifically, the portion of the second stationary contact 442 located outside the first housing 432 has a through-hole 4421, and the axial direction of the through-hole 4421 intersects the coil axial direction X. An external conductive element can be located at the position of the through-hole 4421, and a fastener is used to sequentially pass through the external conductive element and the through-hole 4421 to attach the external conductive element to the second stationary contact, thereby electrically connecting the external conductive element to the second stationary contact 442. Optionally, the axial direction of the through-hole 4421 can be perpendicular to the coil axial direction X.

[0138] By placing at least some of the stationary contacts outside the first housing 432, it is convenient for the stationary contacts to be electrically connected to the external conductive components. At the same time, the stationary contacts are provided with a connection hole 4421 in the direction intersecting with the coil axis X, so that the external conductive components can be electrically connected to the stationary contacts in the direction intersecting with the coil axis X, thereby reducing the space occupied by the external conductive components along the coil axis X.

[0139] Combination Figures 5 to 9 As shown, in some embodiments of this application, the mounting part 433 and the first housing 432 are an integral structure, or the mounting part 433 is fixedly connected to the first housing 432.

[0140] Specifically, the mounting part 433 can be an integral structure with the first housing 432, meaning they are integrally formed. Optionally, the first housing 432 is a ceramic housing, and the mounting part 433 is part of the ceramic housing, formed together by dry pressing, injection molding, or 3D printing. Alternatively, the mounting part 433 is fixedly connected to the first housing 432, meaning the mounting part 433 and the first housing 432 are formed separately, and then connected to each other after forming. Optionally, the mounting part 433 is connected to the first housing 432 by bonding, welding, or snap-fitting.

[0141] By making the mounting part 433 and the first housing 432 an integral structure, the connection strength between the mounting part 433 and the first housing 432 can be improved. By fixing the mounting part 433 to the first housing 432, it is convenient to process the mounting part 433 separately, and fix the processed mounting part 433 to the first housing 432, thereby facilitating the connection of the stationary contact to the first housing 432 through the mounting part 433.

[0142] Combination Figures 5 to 9 As shown, in some embodiments of this application, at least one stationary contact includes a first stationary contact 441 and a second stationary contact 442, the first stationary contact 441 and the second stationary contact 442 are spaced apart along a first direction Y, and the conductive member 431 is configured to be electrically connected to the first stationary contact 441 and the second stationary contact 442 respectively, the first direction Y intersects the axis of the coil 421.

[0143] Specifically, the relay body 401 includes a first stationary contact 441 and a second stationary contact 442, which are spaced apart along a first direction Y to reduce the occurrence of short-circuit conduction between them. The first stationary contact 441 and the second stationary contact 442 are electrically connected to a conductive element 431, thereby completing circuit conduction through the first stationary contact 441, the conductive element 431, and the second stationary contact 442. Optionally, one of the first stationary contact 441 and the second stationary contact 442 can be electrically connected to an external power source, such as a battery cell 21, and serve as a circuit input terminal, while the other can be electrically connected to an external electrical device and serve as a circuit output terminal, thus completing circuit conduction through the first stationary contact 441, the conductive element 431, and the second stationary contact 442. Optionally, the first direction Y is perpendicular to the coil axis X. The coil axis X can be the height direction of the relay 40, and the first direction Y can be the length direction of the relay 40.

[0144] By electrically connecting the conductive element 431 to the first stationary contact 441 and the second stationary contact 442 respectively, one of the first stationary contact 441 and the second stationary contact 442 can be used as a circuit input terminal, and the other can be used as a circuit output terminal, thereby forming a conductive circuit through the conductive element 431, the first stationary contact 441 and the second stationary contact 442.

[0145] Combination Figures 5 to 9 As shown, in some embodiments of this application, the conductive element 431 has a first position when the coil 421 is not energized, and the conductive element 431 also has a second position away from the coil 421 under the action of the magnetic field when the coil 421 is energized. When the conductive element 431 is in the second position, the conductive element 431 is electrically connected to the first stationary contact 441 and the second stationary contact 442 respectively.

[0146] Specifically, when coil 421 is not energized, i.e., when conductive element 431 is not subjected to the magnetic force of coil 421, conductive element 431 is in the first position, and in the first position, conductive element 431 is disconnected from the first stationary contact 441 and the second stationary contact 442, respectively. Relay 40 cannot connect the circuit through the first stationary contact 441, the first conductive element 431, and the second stationary contact 442. When coil 421 is energized, i.e., when conductive element 431 is subjected to the magnetic field of coil 421, conductive element 431 moves away from coil 421 to the second position under the influence of the magnetic field. When conductive element 431 is in the second position, conductive element 431 is electrically connected to the first stationary contact 441 and the second stationary contact 442, respectively. Relay 40 can then connect the circuit through the first stationary contact 441, the conductive element 431, and the second stationary contact 442.

[0147] When the coil 421 is energized, the conductive element 431 can be driven to the second position under the magnetic field of the coil 421, and is used to conductively connect the first stationary contact 441 and the second stationary contact 442, thereby forming a conductive circuit through the conductive element 431, the first stationary contact 441 and the second stationary contact 442.

[0148] Combination Figures 5 to 9 As shown, in some embodiments of this application, at least one mounting part 433 includes two mounting parts, which are spaced apart along the first direction Y and are respectively located inside the first housing 432. At least a portion of the first stationary contact 441 and at least a portion of the second stationary contact 442 are respectively inserted into the inside of the first housing 432 and are connected to the two mounting parts 433 in a one-to-one correspondence.

[0149] Specifically, since the relay body 401 includes a first stationary contact 441 and a second stationary contact 442, correspondingly, at least one mounting portion includes two mounting portions 433, and the arrangement of the two mounting portions 433 is consistent with the arrangement of the first stationary contact 441 and the second stationary contact 442, respectively arranged at intervals along the first direction Y. The first stationary contact 441 and the second stationary contact 442 are respectively connected to the two mounting portions 433 in a one-to-one correspondence, such as by threaded connection.

[0150] By connecting the first stationary contact 441 and the second stationary contact 442 to the mounting part 433 respectively, the fixing effect of the first stationary contact 441 and the second stationary contact 442 can be improved.

[0151] Combination Figures 5 to 9 As shown, in some embodiments of this application, the first housing 432 includes a ceramic housing.

[0152] Specifically, the ceramic housing has insulating properties, which can effectively reduce the arcing that occurs when the conductive element 431 breaks off from the stationary contact, thus reducing the damage to the first housing 432.

[0153] Optionally, the interior of the ceramic housing is formed with a mounting cavity for mounting the conductive element 431, and the conductive element 431 can move along the coil axis X within the mounting cavity.

[0154] Optionally, the first housing 432 includes a body portion 4321 and a sealing plate 4322. The body portion 4321 surrounds and forms a mounting cavity. An opening is formed on the side of the body portion 4321 facing the coil assembly 42. The sealing plate 4322 is connected to the body portion 4321 and seals the opening of the body portion 4321. A first mounting hole 4323 is provided through the side of the body portion 4321 away from the coil assembly 42. The stationary contact can pass through the first mounting hole 4323 and be inserted into the mounting cavity formed in the body portion 4321, and connected to the mounting portion 433. Optionally, the body portion 4321 and the sealing plate 4322 are both ceramic plates.

[0155] By placing the conductive element 431 inside the ceramic housing, the ceramic housing can effectively isolate the conductive element 431 from the electric arc generated when the stationary contact is disconnected, reducing the risk of the electric arc breaking down the ceramic housing and damaging other components inside the relay 40.

[0156] Combination Figures 5 to 9 As shown, in some embodiments of this application, the magnet assembly 43 further includes at least one magnet 434, which is disposed outside the first housing 432, and the magnetic field direction of the magnet 434 is perpendicular to the axis of the coil 421.

[0157] Specifically, magnet 434 is disposed outside the first housing 432 in a direction perpendicular to the coil axis X, and the magnetic field direction of magnet 434 is perpendicular to the magnetic field direction of coil 421. Optionally, magnet 434 can be directly attached to the outside of the first housing 432, such as by bonding; or magnet 434 can be disposed on support plate 435, and support plate 435 can be disposed outside the first housing 432, such as by connecting support plate 435 to outer shell 41. Optionally, there can be multiple support plates 435, which are spaced apart and arranged in a ring around the outside of the first housing 432, and each support plate 435 is provided with multiple magnets 434.

[0158] By placing the magnet 434 outside the first housing 432, when the conductive element 431 breaks with the stationary contact and generates an electric arc, the magnet 434 can generate a magnetic field in the direction perpendicular to the coil axis X. The electric arc current interacts with the magnetic field to generate a force that pushes the electric arc to move outward, causing it to stretch and cool down and extinguish, thereby achieving the purpose of magnetic blowout arc extinguishing.

[0159] Combination Figures 5 to 9 As shown, in some embodiments of this application, the coil assembly 42 further includes a second housing 422, which is disposed inside the outer casing 41, and the coil 421 is disposed inside the second housing 422.

[0160] Specifically, the second housing 422 has an internal mounting cavity, and the coil 421 is fixed within the mounting cavity of the second housing 422. Optionally, the coil assembly 42 also includes an iron core (not shown in the figure), which is fixed inside the second housing 422, and the coil 421 is wound around the outer circumference of the iron core. Optionally, the second housing 422 can be an insulating component, thereby reducing the possibility of short circuits between the second housing 422 and the energized coil 421.

[0161] Optionally, the second housing 422 has a second through hole 4221 on the side facing the magnet assembly 43, and the first housing 432 has a first through hole 4324 on the side facing the coil assembly 42, with the first through hole 4324 and the second through hole 4221 coaxially arranged. A columnar structure is formed at the bottom of the conductive member 431, and the columnar structure can sequentially pass through the first through hole 4324 and the second through hole 4221, and be inserted into the interior of the coil assembly 42. Optionally, the first housing 432 includes a connected body portion 4321 and a sealing plate 4322, with the first through hole 4324 extending through the sealing plate 4322.

[0162] By placing the second housing 422 inside the outer casing 41 and placing the coil 421 inside the second housing 422, the coil assembly 42 can be formed by placing the coil 421 inside the second housing 422 first, and then assembling the coil assembly 42 inside the outer casing 41, thereby facilitating the modular assembly of the relay 40.

[0163] Combination Figures 5 to 9 As shown, in some embodiments of this application, the conductive element 431 includes an armature that is conductive.

[0164] Specifically, the armature is magnetic and conductive. Optionally, the conductive element 431 includes a conductive armature. When the coil 421 is energized, the magnetic field generated by the coil 421 can directly act on the conductive element 431 and drive the conductive element 431 to move along the coil axis X. In some other embodiments of this application, a support member connected to the conductive element 431 can also be provided, wherein the conductive element 431 is a metal conductive element, the support member is an armature, and an insulating member is provided between the conductive element 431 and the support member to reduce the occurrence of short circuits. The support member can move away from the coil 421 under the action of the magnetic field when the coil 421 is energized, thereby driving the conductive element 431 to move together.

[0165] The armature is magnetic and can be driven by the magnetic field generated by the energized coil 421. At the same time, the armature is also conductive, so that the circuit can be connected through the conductive component 431.

[0166] Combination Figures 5 to 9 As shown, in some embodiments of this application, the relay 40 includes a plurality of relay bodies 401, and the coil assembly 42 and magnet assembly 43 of the plurality of relay bodies 401 are respectively disposed inside the same housing 41.

[0167] Specifically, the number of relay bodies 401 can be two or more. For ease of description, we will only take two relay bodies 401 arranged side by side and opposite each other inside the same housing 41 as an example.

[0168] The arrangement of either of the two relay bodies 401 can be the same as the arrangement of the relay body 401 and the housing 41 in any of the above embodiments.

[0169] By housing multiple relay bodies 401 together inside the same housing 41, the extra space occupied by each relay body 401 in its own housing 41 can be reduced, thereby reducing the space occupancy rate of the relay 40 and improving the integration of the relay 40, which facilitates overall assembly.

[0170] Combination Figures 5 to 9 As shown, in some embodiments of this application, the conductive element 431 of any relay body 401 extends along the first direction Y, and multiple relay bodies 401 are arranged side by side along the first direction Y, wherein the first direction Y is perpendicular to the axis of the coil 421.

[0171] Specifically, two relay bodies 401 are arranged side by side along the first direction Y, and the conductive element 431 of any one of the relay bodies 401 extends along the first direction Y, that is, the conductive element 431 of any one of the relay bodies 401 is located on the side away from the other relay body 401 along the first direction Y.

[0172] By arranging multiple relay bodies 401 side by side along the first direction Y, the space occupancy rate of the relays 40 along the first direction Y can be improved.

[0173] Combination Figures 5 to 9 As shown, in some embodiments of this application, the plurality of relay bodies 401 include at least a first relay body 4011 and a second relay body 4012 arranged adjacent to each other. The relay 40 also includes a conductive connector 45. One of the stationary contacts of the first relay body 4011 is electrically connected to one of the stationary contacts of the second relay body 4012 through the conductive connector 45.

[0174] Specifically, the first relay body 4011 and the second relay body 4012 are arranged side by side along the first direction Y, and the conductive element 431 of the first relay body 4011 and the conductive element 431 of the second relay body 4012 extend along the first direction Y respectively. Furthermore, one of the two stationary contacts in the first relay body 4011 and one of the two stationary contacts in the second relay body 4012 are connected by a conductive connector 45.

[0175] By electrically connecting the stationary contacts of the two relay bodies 401 through the conductive connector 45, the stability and torsional resistance of the two connected stationary contacts can be improved, thereby reducing the deformation or displacement of the stationary contacts when they are electrically connected to the external conductive parts.

[0176] Combination Figures 5 to 9As shown, in some embodiments of this application, at least one stationary contact includes a first stationary contact 441 and a second stationary contact 442. The first stationary contact 441 of the first relay body 4011 is located on the side of the second stationary contact 442 of the first relay body 4011 near the second relay body 4012. The first stationary contact 441 of the second relay body 4012 is located on the side of the second stationary contact 442 of the second relay body 4012 near the first relay body 4011. The first stationary contact 441 of the first relay body 4011 is electrically connected to the first stationary contact 441 of the second relay body 4012 through a conductive connector 45.

[0177] Specifically, the first relay body 4011 includes a first stationary contact 441 and a second stationary contact 442, and the second relay body 4012 also includes a first stationary contact 441 and a second stationary contact 442. The first stationary contact 441 of the first relay body 4011 and the first stationary contact 441 of the second relay body 4012 are arranged adjacent to each other, and are electrically connected via a conductive connector 45, thereby allowing the two first stationary contacts 441 to be electrically connected to external conductive components via the conductive connector 45.

[0178] By electrically connecting the two first stationary contacts 441 of the two relay bodies 401 that are arranged adjacent to each other through the conductive connector 45, the stability and torsional resistance of the two first stationary contacts 441 can be improved, and the size of the conductive connector 45 can be reduced.

[0179] Combination Figures 5 to 9 As shown, in some embodiments of this application, along the axial direction of the coil 421, the size of the second stationary contact 442 located outside the first housing 432 is larger than the size of the first stationary contact 441 located outside the first housing 432; and / or, along the direction perpendicular to the axial direction of the coil 421, the size of the end of the second stationary contact 442 away from the first housing 432 is larger than the size of the end of the first stationary contact 441 away from the first housing 432.

[0180] Specifically, the first stationary contact 441, excluding the fixing part 443, is a generally cylindrical structure, and the second stationary contact 442, excluding the fixing part 443, is also a generally cylindrical structure. The axial directions of the first stationary contact 441 and the second stationary contact 442 are approximately parallel to the coil axial direction X. The first stationary contact 441 is used to connect with the conductive connector 45; therefore, the dimension of the first stationary contact 441 along the coil axial direction X can pass through the conductive connector 45 and be welded to it. Optionally, a portion of the first stationary contact 441 extends beyond the conductive connector 45 to the side opposite to the first housing 432, thus facilitating welding between the first stationary contact 441 and the conductive connector 45. The second stationary contact 442 is used to connect with an external conductive component; therefore, along the coil axial direction X, the dimension of the portion of the second stationary contact 442 extending outside the first housing 432 is larger than the dimension of the portion of the first stationary contact 441 extending outside the first housing 432, thus facilitating electrical connection between the second stationary contact 442 and the external conductive component.

[0181] Optionally, since the first stationary contact 441 is connected to an external conductive component through a conductive connector 45, the conductive connector 45 can improve the torsional resistance of the first stationary contact 441. The second stationary contact 442 is directly connected to the external conductive component. Therefore, along the direction perpendicular to the coil axis X, the dimension of the end of the second stationary contact 442 away from the first housing 432 is larger than the dimension of the end of the first stationary contact 441 away from the first housing 432, thereby improving the support strength of the second stationary contact 442 and reducing the bending phenomenon of the second stationary contact 442.

[0182] By making the second stationary contact 442, located outside the first housing 432, larger than the first stationary contact 441 along the coil axis X, the second stationary contact 442 has sufficient dimensions to connect with external conductive components. Furthermore, by making the end of the second stationary contact 442 facing away from the first housing 432 larger than the end of the first stationary contact 441 facing away from the first housing 432 along a direction perpendicular to the coil axis X, the second stationary contact 442 can easily connect with external conductive components and has sufficient supporting strength, reducing the likelihood of bending.

[0183] Combination Figures 5 to 9 As shown, in some embodiments of this application, one of the stationary contacts of the first relay body 4011 is welded to the conductive connector 45, and / or, one of the stationary contacts of the second relay body 4012 is welded to the conductive connector 45.

[0184] Specifically, the first stationary contact 441 of the first relay body 4011 is welded to the conductive connector 45. The first stationary contact 441 of the second relay body 4012 is welded to the conductive connector 45.

[0185] Connecting one of the stationary contacts of the first relay body 4011 to the conductive connector 45 by welding improves the fixing effect of the stationary contact and the conductive connector 45 in the first relay body 4011. Similarly, connecting one of the stationary contacts of the second relay body 4012 to the conductive connector 45 by welding improves the fixing effect of the stationary contact and the conductive connector 45 in the second relay body 4012.

[0186] Combination Figures 5 to 9 As shown, in some embodiments of this application, the conductive connector 45 includes a conductive plate 451 and a connecting post 452. One of the stationary contacts of the first relay body 4011 is electrically connected to one of the stationary contacts of the second relay body 4012 through the conductive plate 451. The connecting post 452 is disposed on the conductive plate 451 and electrically connected to the conductive plate 451. The connecting post 452 is configured to be electrically connected to an external conductive component.

[0187] Specifically, the conductive plate 451 has a plate-like structure, and two first stationary contacts 441 are electrically connected to the conductive plate 451, such as by welding. The conductive plate 451 includes at least one plate surface, and the connecting post 452 is electrically connected to the plate surface of the conductive plate 451, such as by welding or riveting, so that the connecting post 452 protrudes from the plate surface of the conductive plate 451, thereby facilitating the electrical connection of the connecting post 452 with external conductive components.

[0188] By connecting the stationary contacts in the first relay body 4011 and the second relay body 4012 through the conductive plate 451, the connection stability and torsional resistance of the stationary contacts in the first relay body 4011 and the second relay body 4012 can be improved. Furthermore, the conductive plate 451 is provided with connecting posts 452, which facilitates electrical connection with external conductive components. Thus, the stationary contacts and external conductive components are connected through the conductive connector 45.

[0189] Combination Figures 5 to 9 As shown, in some embodiments of this application, the conductive plate 451 includes a first plate portion 4511 and a second plate portion 4512. The first plate portion 4511 intersects the axial direction of the coil 421 and is electrically connected to the stationary contact. The second plate portion 4512 is arranged at an angle to the first plate portion 4511, and the connecting post 452 is provided on the plate surface of the second plate portion 4512.

[0190] Specifically, the first plate portion 4511 and the second plate portion 4512 are arranged at an included angle, thereby forming an L-shaped plate structure. The surface of the first plate portion 4511 intersects the coil axis X. Optionally, the surface of the first plate portion 4511 is perpendicular to the coil axis X. The first stationary contacts 441 of the first relay body 4011 and the second relay body 4012 are respectively connected to the first plate portion 4511, such as by welding. A connecting post 452 is provided on the plate body of the second plate portion 4512, such as by riveting or welding, and is located on the side of the second plate portion 4512 facing the first plate portion 4511.

[0191] By setting the first plate portion 4511 and the second plate portion 4512 at an angle, with the first plate portion 4511 electrically connected to the stationary contact and the connecting post 452 disposed on the plate surface of the second plate portion 4512, it is easy to adjust the position and extension direction of the connecting post 452, thereby facilitating the electrical connection of the connecting post 452 with the external conductive component.

[0192] Combination Figures 5 to 9 As shown, in some embodiments of this application, the second plate portion 4512 is disposed on one side of the first plate portion 4511 along the second direction Z, and the connecting post 452 is disposed on the side of the second plate portion 4512 facing the first plate portion 4511 along the second direction Z and extends along the second direction Z, wherein the first direction Y, the second direction Z and the coil axis X are perpendicular to each other.

[0193] Specifically, the first relay body 4011 and the second relay body 4012 are arranged side by side along the first direction Y, and the conductive elements of the first relay body 4011 and the second relay body 4012 extend along the first direction Y respectively. The second plate portion 4512 is provided on one side of the first plate portion 4511 along the second direction Z, and the connecting post 452 is provided on the side of the second plate portion 4512 facing the first plate portion 4511 along the second direction Z.

[0194] Optionally, the outer casing 41 also has a support boss 411 protruding on one side along the second direction Z, and the second plate portion 4512 abuts against the support boss 411, thereby improving the stability of the second plate portion 4512.

[0195] By providing the connecting post 452 along the second direction Z on one side of the second plate portion 4512 and extending it along the second direction Z, the space occupancy rate of the connecting post 452 along the first direction Y and the coil axis X can be reduced, while the space occupancy rate of the connecting post 452 along the second direction Z can be increased, and it is convenient for the connecting post 452 to be electrically connected to the external conductive component along the second direction Z.

[0196] Combination Figures 5 to 9As shown, in some embodiments of this application, at least one stationary contact includes a first stationary contact 441 and a second stationary contact 442, and the first stationary contact 441 of the first relay body 4011 and the first stationary contact 441 of the second relay body 4012 are electrically connected through a first plate portion 4511.

[0197] Wherein, the second stationary contact 442 of the first relay body 4011 is provided with a connecting hole 4421 through the second stationary contact 442 in the direction intersecting with the axial direction of the coil 421, and / or, the second stationary contact 442 of the second relay body 4012 is provided with a connecting hole 4421 through the second stationary contact 442 in the direction intersecting with the axial direction of the coil 421.

[0198] Specifically, the first stationary contact 441 of the first relay body 4011 and the first stationary contact 441 of the second relay body 4012 are arranged adjacent to each other, and the first stationary contact 441 of the first relay body 4011 and the first stationary contact 441 of the second relay body 4012 are electrically connected through a conductive connector 45, so that the two first stationary contacts 441 are respectively electrically connected to an external conductive component through the conductive connector 45.

[0199] The second stationary contact 442 in the same relay body 401 is located on the side of the first stationary contact 441 away from the other relay body 401. The second stationary contacts 442 of the first relay body 4011 and the second relay body 4012 are respectively provided with connecting holes 4421, and the axial direction of the connecting holes 4421 intersects the coil axial direction X. An external conductive element can be located at the position of the connecting hole 4421, and a fastener is used to sequentially pass through the external conductive element and the connecting hole 4421 to attach the external conductive element to the second stationary contact 442, thereby electrically connecting the external conductive element to the second stationary contact 442. Optionally, the axial direction of the connecting hole 4421 can be perpendicular to the coil axial direction X.

[0200] By providing a connecting hole 4421 through the second stationary contact 442 in the direction intersecting with the coil axis X, it is convenient to connect the second stationary contact 442 to the external conductive component in the direction intersecting with the coil axis X, thereby reducing the space occupied by the external conductive component along the coil axis X.

[0201] Combination Figures 10 to 14 As shown, in some embodiments of this application, the conductive plate 451 is a straight plate and intersects the axis of the coil 421, and at least part of the connecting post 452 is provided on the side of the conductive plate 451 away from the magnet assembly 43.

[0202] Specifically, the conductive plate 451 is a straight plate, and its surface intersects the coil axis X. Optionally, the surface of the conductive plate 451 is perpendicular to the coil axis X. At least a portion of the connecting post 452 protrudes from the conductive plate 451 along the coil axis X on the side opposite to the magnet assembly 43, thereby facilitating electrical connection between the connecting post 452 and an external conductive element. The axis of the connecting post 452 is parallel to the coil axis X. Because the axis of the connecting post 452 is parallel to the coil axis X, it can be connected to the external conductive element along the coil axis X. Correspondingly, the axis of the second stationary contact 442 is also parallel to the coil axis X, thereby facilitating connection between the first stationary contact 441 and the connecting post 452 to the external conductive element along the coil axis X. Optionally, the connecting post 452 can be riveted to the conductive plate 451. Some of the connecting posts 452 are located on the side of the conductive plate 451 facing the magnet assembly 43, and the other part of the connecting posts 452 pass through the conductive plate 451 and are located on the side of the conductive plate 451 away from the magnet assembly 43, so as to be riveted to the conductive plate 451.

[0203] By placing the connecting post 452 on the side of the conductive plate 451 away from the magnet assembly 43, it is convenient for the connecting post 452 to be connected to the external conductive component along the coil axis X.

[0204] like Figure 1 As shown, a second aspect of this application provides an electrical device that includes the battery device 10 described above.

[0205] Since the electrical device in this application has the same technical features as the battery device 10 in any of the above embodiments and can achieve the same technical effect, it will not be described again here.

[0206] like Figure 1 As shown, in some embodiments of this application, the electrical device can be a vehicle 1, which includes a battery device 10 according to any of the above embodiments. The battery device 10 is used to provide electrical energy to the vehicle 1 and to drive the vehicle 1 to move.

[0207] 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.

[0208] Combination Figure 2 , Figures 5 to 9As shown, in some embodiments of this application, the battery device 10 includes at least one battery cell 21 and a relay 40 electrically connected to the battery cell 21. The relay 40 includes a housing 41 and a relay body 401. At least a portion of the relay body 401 is disposed inside the housing 41. The relay body 401 includes a coil assembly 42, a magnet assembly 43, and at least one stationary contact. The coil assembly 42 includes a coil 421 that generates a magnetic field when energized. The magnet assembly 43 includes a first housing 432 and a conductive element 431 disposed within the first housing 432. The conductive element 431 is configured to be driven by the magnetic field of the coil 421 when energized. The first housing 432 has a first mounting hole 4323 extending through it, and at least one mounting portion 433 protrudes from the surface of the first housing 432. The stationary contact is connected to the mounting portion 433 and is configured to be electrically connected to the conductive element 431.

[0209] Optionally, the mounting portion 433 protrudes from the inner surface of the first housing 432. The mounting portion 433 is provided with a first threaded hole. Along the coil axis X, the projection range of the first mounting hole 4323 and the projection range of the first threaded hole at least partially overlap. At least a portion of the structure of the stationary contact passes through the first mounting hole 4323 and is threadedly connected to the first threaded hole.

[0210] Optionally, a fixing part 443 is provided on the outer surface of the stationary contact along the direction intersecting with the coil axis X. The fixing part 443 is located outside the first housing 432 and abuts against the first housing 432.

[0211] Optionally, the mounting part 433 is fixedly connected to the first housing 432.

[0212] Optionally, at least one stationary contact includes a first stationary contact 441 and a second stationary contact 442, the first stationary contact 441 and the second stationary contact 442 being spaced apart along a first direction Y, and the conductive element 431 being configured to be electrically connected to the first stationary contact 441 and the second stationary contact 442 respectively, the first direction Y intersecting the coil axis X.

[0213] Optionally, the conductive element 431 has a first position when the coil 421 is not energized, and the conductive element 431 also has a second position away from the coil 421 under the action of the magnetic field when the coil 421 is energized. When the conductive element 431 is in the second position, the conductive element 431 is electrically connected to the first stationary contact 441 and the second stationary contact 442 respectively.

[0214] Optionally, at least one mounting portion 433 includes two mounting portions 433, which are spaced apart along the first direction Y and are respectively located inside the first housing 432. At least a portion of the first stationary contact 441 and at least a portion of the second stationary contact 442 are respectively inserted into the inside of the first housing 432 and are connected to the two mounting portions 433 in a one-to-one correspondence.

[0215] Optionally, the first housing 432 includes a ceramic housing.

[0216] Optionally, the magnet assembly 43 further includes at least one magnet 434, which is disposed outside the first housing 432, and the magnetic field direction of the magnet 434 is perpendicular to the coil axis X.

[0217] Optionally, the coil assembly 42 may further include a second housing 422, which is disposed inside the outer casing 41, and the coil 421 is disposed inside the second housing 422.

[0218] Optionally, the conductive element 431 includes an armature that is conductive.

[0219] Optionally, the relay 40 includes multiple relay bodies 401, and the coil assembly 42 and magnet assembly 43 of the multiple relay bodies 401 are respectively disposed inside the same housing 41.

[0220] Optionally, the conductive element 431 of any relay body 401 extends along the first direction Y, and multiple relay bodies 401 are arranged side by side along the first direction Y, wherein the first direction Y is perpendicular to the coil axis X.

[0221] Optionally, the plurality of relay bodies 401 may include at least a first relay body 4011 and a second relay body 4012 disposed adjacent to each other, and the relay 40 may also include a conductive connector 45. A first stationary contact 441 of the first relay body 4011 is located on the side of the second stationary contact 442 of the first relay body 4011 near the second relay body 4012, and a first stationary contact of the second relay body 4012 is located on the side of the second stationary contact 442 of the second relay body 4012 near the first relay body 4011. The first stationary contact 441 of the first relay body 4011 is electrically connected to the first stationary contact 441 of the second relay body 4012 via the conductive connector 45. A connecting hole 4421 is provided through the second stationary contact 442 of the first relay body 4011 in a direction intersecting the coil axis X. A connecting hole 4421 is also provided through the second stationary contact 442 of the second relay body 4012 in a direction intersecting the coil axis X.

[0222] Optionally, along the coil axis X, the dimension of the second stationary contact 442 located outside the first housing 432 is larger than the dimension of the first stationary contact 441 located outside the first housing 432. Along a direction perpendicular to the coil axis X, the dimension of the end of the second stationary contact 442 facing away from the first housing 432 is larger than the dimension of the end of the first stationary contact 441 facing away from the first housing 432.

[0223] Optionally, the first stationary contact 441 of the first relay body 4011 is welded to the conductive connector 45. The first stationary contact 441 of the second relay body 4012 is also welded to the conductive connector 45.

[0224] Optionally, the conductive connector 45 includes a conductive plate 451 and a connecting post 452. The first stationary contact 441 of the first relay body 4011 is electrically connected to the first stationary contact 441 of the second relay body 4012 through the conductive plate 451. The connecting post 452 is disposed on the conductive plate 451 and electrically connected to the conductive plate 451. The connecting post 452 is configured to be electrically connected to an external conductive component.

[0225] Optionally, the conductive plate 451 includes a first plate portion 4511 and a second plate portion 4512. The first plate portion 4511 intersects the coil axis X and is electrically connected to the first stationary contact 441. The second plate portion 4512 is set at an angle to the first plate portion 4511, and the connecting post 452 is provided on the plate surface of the second plate portion 4512.

[0226] Optionally, the second plate portion 4512 is disposed on one side of the first plate portion 4511 along the second direction Z, and the connecting post 452 is disposed on the side of the second plate portion 4512 facing the first plate portion 4511 along the second direction Z and extends along the second direction Z, wherein the first direction Y, the second direction Z and the coil axis X are perpendicular to each other.

[0227] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this 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. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: At least one battery cell; The relay is electrically connected to the battery cell; The relay includes a housing and a relay body, with at least a portion of the relay body disposed inside the housing. The relay body includes: A coil assembly, the coil assembly comprising a coil that generates a magnetic field when energized; A magnet assembly includes a first housing and a conductive element disposed within the first housing. The conductive element is configured to be driven by the magnetic field when the coil is energized. The first housing has a first mounting hole extending through it, and at least one mounting portion protrudes from the surface of the first housing. At least one stationary contact, at least a portion of the structure of which passes through the first mounting hole and is connected to the mounting portion, the stationary contact being configured to be electrically connected to the conductive element, the mounting portion protruding from the inner surface of the first housing, at least a portion of the structure of which is inserted into the interior of the first housing and connected to the mounting portion.

2. The battery device according to claim 1, characterized in that, The mounting portion is provided with a first threaded hole. Along the axial direction of the coil, the projection range of the first mounting hole and the projection range of the first threaded hole at least partially overlap. At least a portion of the structure of the stationary contact passes through the first mounting hole and is threadedly connected to the first threaded hole.

3. The battery device according to claim 1, characterized in that, The outer surface of the stationary contact protrudes with a fixing part along the direction intersecting with the axial direction of the coil. The fixing part is located outside the first housing and abuts against the first housing.

4. The battery device according to claim 1, characterized in that, At least a portion of the stationary contacts are located outside the first housing, and a connecting hole is provided through them in a direction intersecting the axial direction of the coil.

5. The battery device according to claim 1, characterized in that, The mounting part is an integral part of the first housing, or the mounting part is fixedly connected to the first housing.

6. The battery device according to any one of claims 1 to 5, characterized in that, The at least one stationary contact includes a first stationary contact and a second stationary contact, the first stationary contact and the second stationary contact being spaced apart along a first direction, the conductive element being configured to be electrically connected to the first stationary contact and the second stationary contact respectively, the first direction intersecting the axial direction of the coil.

7. The battery device according to claim 6, characterized in that, The conductive element has a first position when the coil is not energized, and a second position when the magnetic field of the coil is energized and the conductive element is away from the coil. When the conductive element is in the second position, the conductive element is electrically connected to the first stationary contact and the second stationary contact respectively.

8. The battery device according to claim 6, characterized in that, The at least one mounting portion includes two mounting portions, which are spaced apart along the first direction and are respectively located inside the first housing. At least a portion of the first stationary contact and at least a portion of the second stationary contact are respectively inserted into the interior of the first housing and are connected to the two mounting portions one by one.

9. The battery device according to any one of claims 1 to 5, characterized in that, The first housing comprises a ceramic housing.

10. The battery device according to any one of claims 1 to 5, characterized in that, The magnet assembly further includes at least one magnet disposed outside the first housing, and the magnetic field direction of the magnet is perpendicular to the axis of the coil.

11. The battery device according to any one of claims 1 to 5, characterized in that, The coil assembly further includes a second housing, which is disposed inside the outer casing, and the coil is disposed inside the second housing.

12. The battery device according to any one of claims 1 to 5, characterized in that, The conductive element includes an armature that is conductive.

13. The battery device according to any one of claims 1 to 5, characterized in that, The relay includes multiple relay bodies, and the coil assemblies and magnet assemblies of the multiple relay bodies are respectively disposed inside the same housing.

14. The battery device according to any one of claims 1 to 5, characterized in that, The conductive element of any one of the relay bodies extends along a first direction, and a plurality of the relay bodies are arranged side by side along the first direction, wherein the first direction is perpendicular to the axis of the coil.

15. The battery device according to claim 14, characterized in that, The plurality of relay bodies include at least a first relay body and a second relay body arranged adjacent to each other. The relays also include a conductive connector, and one of the stationary contacts of the first relay body is electrically connected to one of the stationary contacts of the second relay body through the conductive connector.

16. The battery device according to claim 15, characterized in that, The at least one stationary contact includes a first stationary contact and a second stationary contact. The first stationary contact of the first relay body is located on the side of the second stationary contact of the first relay body close to the second relay body. The first stationary contact of the second relay body is located on the side of the second stationary contact of the second relay body close to the first relay body. The first stationary contact of the first relay body is electrically connected to the first stationary contact of the second relay body through the conductive connector.

17. The battery device according to claim 16, characterized in that, Along the axial direction of the coil, the dimension of the second stationary contact located outside the first housing is greater than the dimension of the first stationary contact located outside the first housing; and / or, along a direction perpendicular to the axial direction of the coil, the dimension of the end of the second stationary contact opposite to the first housing is greater than the dimension of the end of the first stationary contact opposite to the first housing.

18. The battery device according to claim 15, characterized in that, One of the stationary contacts of the first relay body is welded to the conductive connector, and / or one of the stationary contacts of the second relay body is welded to the conductive connector.

19. The battery device according to claim 15, characterized in that, The conductive connector includes a conductive plate and a connecting post. One of the stationary contacts of the first relay body is electrically connected to one of the stationary contacts of the second relay body through the conductive plate. The connecting post is disposed on the conductive plate and electrically connected to the conductive plate. The connecting post is configured to be electrically connected to an external conductive component.

20. The battery device according to claim 19, characterized in that, The conductive plate includes a first plate portion and a second plate portion. The first plate portion intersects the axial direction of the coil and is electrically connected to the stationary contact. The second plate portion is set at an angle to the first plate portion. The connecting post is disposed on the plate surface of the second plate portion.

21. The battery device according to claim 20, characterized in that, The second plate is disposed on one side of the first plate along the second direction, and the connecting post is disposed on the side of the second plate facing the first plate along the second direction and extends along the second direction, wherein the first direction, the second direction and the axis of the coil are perpendicular to each other.

22. The battery device according to claim 20, characterized in that, The at least one stationary contact includes a first stationary contact and a second stationary contact, and the first stationary contact of the first relay body and the first stationary contact of the second relay body are electrically connected through the first plate. Wherein, the second stationary contact of the first relay body is provided with a connecting hole through a direction intersecting the axial direction of the coil, and / or, the second stationary contact of the second relay body is provided with a connecting hole through a direction intersecting the axial direction of the coil.

23. The battery device according to claim 19, characterized in that, The conductive plate is a straight plate and intersects the axis of the coil. At least a portion of the connecting posts are located on the side of the conductive plate away from the magnet assembly.

24. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 23.

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