Power distribution device, battery device and electric equipment

Abstract

The utility model relates to the field of batteries, and provides a power distribution device, a battery device and electric equipment. The power distribution device comprises a base and a relay. The base is provided with a mounting hole. The relay comprises a relay body, and at least part of the relay body is arranged in the mounting hole. The mounting hole is a circular hole, the hole wall of the mounting hole is provided with an internal thread, the relay main body is a cylinder, the outer wall of the part, arranged in the mounting hole, of the relay main body is provided with an external thread matched with the internal thread, and the relay main body is in threaded connection with the base. The relay comprises a first interface assembly and a second interface assembly, and the first interface assembly and the second interface assembly are arranged on the same side or two opposite sides of a relay body in the axial direction. On the basis, the connection firmness between the relay and the base can be improved, the installation stability and the installation reliability of the relay can be improved, and risks of hidden dangers such as relay loosening and disconnection of electric connection between the relay and other components can be reduced under complex working conditions.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a power distribution device, a battery device and a power consumption equipment. BACKGROUND

[0002] The power distribution device generally comprises a base, a relay and a cover. The base has a receiving cavity, the relay is accommodated in the receiving cavity, and the cover is connected with the base and covers the opening of the receiving cavity to limit and fix the relay in the receiving cavity of the base. In some cases, the cover is matched with the base through snap-fitting. However, the stability of the snap-fitting is poor under complex working conditions, and the snap-fitting is prone to loosening and decoupling failure, which causes the cover to be easily loosened from the base, and causes the relay to be loosened, the electrical connection between the relay and other components to be disconnected and other hidden troubles, thereby affecting the installation reliability of the relay. CONTENT OF THE UTILITY MODEL

[0003] The application embodiment provides a power distribution device, and aims to solve the problem of poor installation reliability of the relay, and the hidden troubles of the loosened relay and the disconnected electrical connection between the relay and other components.

[0004] To achieve the above object, the technical scheme adopted by the application embodiment is as follows:

[0005] In a first aspect, a power distribution device is provided, comprising:

[0006] a base provided with a mounting hole;

[0007] a relay comprising a relay main body, at least a part of the relay main body being arranged in the mounting hole;

[0008] wherein the mounting hole is a circular hole, the hole wall of the mounting hole is provided with an internal thread, the relay main body is a cylinder, the outer wall of the part of the relay main body arranged in the mounting hole is provided with an external thread matched with the internal thread, and the relay main body is threadedly connected with the base;

[0009] wherein the relay comprises a first interface assembly and a second interface assembly, and the first interface assembly and the second interface assembly are arranged on the same side or opposite sides of the relay main body along the axial direction.

[0010] The power distribution device provided by the embodiments of the present application has the following advantages. The mounting hole of the base is a circular hole, the hole wall of the mounting hole is provided with an internal thread, the relay main body of the relay is a cylinder, and the outer wall of the relay main body is provided with an external thread matched with the internal thread. Thus, the relay main body of the relay can be directly screwed into the mounting hole, that is, the relay main body can be directly screwed to the base without the need of using the cover and the buckle or the screw to limit and fix the relay to the base. Therefore, the installation and connection mode of the relay and the base can be simplified and optimized, the connection firmness between the relay and the base can be improved based on the thread engagement and thread self-locking between the relay and the base, the installation stability and reliability of the relay can be improved, and the risk of hidden troubles such as loosening of the relay and disconnection of the electrical connection between the relay and other components can be reduced under complex working conditions such as bumpy driving, long-term vibration or severe impact of the automobile, and the operation stability and reliability of the power distribution device can be improved. In addition, the installation fastening components such as the cover, the buckle and the screw can be omitted, so that the structure of the power distribution device can be simplified, the complexity in the manufacturing process can be reduced, and the material cost and the production cost can be reduced. In addition, the relay and the base can be assembled conveniently, quickly and reliably, the positioning and adjustment steps (for example, positioning and adjustment of the buckle and the socket, positioning and adjustment of the fastening holes of the relay and the base for the same screw to pass through and connect, etc.) and the fastening steps in the related art can be omitted, so that the assembly steps can be reduced, the assembly operation can be simplified, the assembly time can be shortened, the dependence on manual labor can be reduced, and the assembly convenience and efficiency of the relay can be improved. In addition, the relay can be conveniently disassembled, repaired and replaced, so that the maintainability and maintenance convenience of the relay and the power distribution device can be improved, and the maintenance cost can be reduced. In addition, the surrounding wall of the base for surrounding the mounting hole and provided with the internal thread does not need to have a large wall thickness, and the space occupied by the cover and the screw head along the axial direction of the relay main body can be omitted, so that the required installation space and occupied space of the relay in the power distribution device can be compressed, especially the height of the power distribution device at the position where the relay is arranged along the axial direction of the relay main body can be compressed, so that the overall size of the power distribution device, especially the height, can be reduced, and the miniaturization and integration of the power distribution device can be facilitated.

[0011] By adopting the above scheme, the first interface assembly and the second interface assembly can be arranged along the axial direction of the relay main body, and the first interface assembly and the second interface assembly can be flexibly selected to be arranged on the same side or different sides according to actual needs. Based on this, the interface assembly (i.e., the first interface assembly and the second interface assembly) and the threaded connection structure (i.e., the internal thread and the external thread) can be avoided from interfering with each other, so as to maintain the smoothness of the threaded connection assembly of the relay main body and the base. In addition, the interface layout can be flexibly adjusted according to the actual wiring needs of the power distribution device, which facilitates the wiring operation and debugging operation of the first interface assembly and the second interface assembly along the axial direction of the relay main body, and is conducive to improving the convenience and adaptability of the wiring operation.

[0012] In some embodiments, the first interface assembly and the second interface assembly are arranged on opposite sides of the relay main body along the axial direction.

[0013] By adopting the above scheme, by arranging the first interface assembly and the second interface assembly on opposite sides of the relay main body along the axial direction, on the one hand, the two ends of the relay main body along the axial direction can be utilized to realize the dispersed arrangement of the first interface assembly and the second interface assembly, so as to avoid the threaded connection area of the relay main body and the base and maintain the smoothness of the threaded connection assembly, and reduce the possible structural interference and signal interference caused by the same side arrangement of the first interface assembly and the second interface assembly, so that the first interface assembly and the second interface assembly each have independent assembly space and wiring space, which can improve the design flexibility and structural reliability of the relay. On the other hand, the first interface assembly and the second interface assembly can be arranged in a clear partition, which can form a foolproof design, and the wiring operation of the first interface assembly and the second interface assembly can be conveniently performed from the two ends of the relay main body along the axial direction, which can facilitate quick partition wiring objects and efficient completion of wiring operation, can avoid wiring confusion of the first interface assembly and the second interface assembly, can reduce the risk of miswiring, and can improve the convenience, accuracy and standardization of the wiring operation.

[0014] In some embodiments, the mounting hole is a blind hole, the first interface assembly is arranged on the side of the relay main body facing the bottom wall of the mounting hole, the first interface assembly includes two first interfaces with opposite polarities and arranged at intervals, the bottom wall of the mounting hole is provided with two first through holes in a penetrating manner, and the two first through holes are arranged in one-to-one correspondence with the two first interfaces.

[0015] By adopting the above scheme, the first interface component can be screwed into the mounting hole along with the relay body and positioned close to the bottom wall of the mounting hole. This facilitates protection of the first interface component by the bottom wall of the mounting hole, reducing the corrosion of the first interface component by external dust and moisture, thereby improving the reliability and service life of the first interface component. Furthermore, the first through-holes corresponding to the first interfaces allow for convenient, quick, and reliable connection of the wiring harness to the corresponding first interface without additional positioning, adjustment, winding, or conversion steps. This enables convenient, quick, stable, and reliable connection between the first interface and the internal circuitry of the power distribution device, simplifying the assembly process, saving assembly time and labor, and improving overall assembly efficiency. Moreover, by spacing the two first interfaces with opposite polarities and independently wiring them through the first through-holes, the risk of polarity confusion and short circuits between the two first interfaces is reduced, thus maintaining the stability and reliability of the electrical connection and improving the structural and operational reliability of the power distribution device.

[0016] In some embodiments, the two first interfaces are respectively embedded within the relay body.

[0017] By adopting the above solution, and embedding the two first interfaces into the relay body, the first interfaces can be made to essentially not protrude from the side of the relay body facing the bottom wall of the mounting hole. Based on this, when the relay body and base are threadedly connected, the relay body can be as close as possible to, or even in contact with, the bottom wall of the mounting hole without interference from the first interfaces. This reduces the risk of structural interference between the first interfaces and the bottom wall of the mounting hole, and reduces assembly gaps caused by the protrusion of the first interfaces, thereby improving the compactness and stability of the connection between the relay and the base. Furthermore, since the distance between the relay body and the bottom wall of the mounting hole can be significantly reduced, the distance between the first interface and the first through hole can be shortened. This facilitates quick connection of the wiring harness to the first interface after passing through the first through hole, without the need for additional adjustments to the wiring harness routing or length. This allows for smooth and efficient wiring operations, optimizing wiring efficiency. Furthermore, based on the embedded layout, the insulation material of the relay body itself can be used to physically isolate the two first interfaces with opposite polarities, increasing the creepage distance between the two first interfaces. This reduces the risk of short circuits caused by direct contact or insufficient creepage distance between the two first interfaces, strengthens the insulation isolation between the two first interfaces, and improves the electrical connection reliability and operational reliability of the power distribution device.

[0018] In some embodiments, the base includes a partition portion, which is an insulating portion, disposed on the bottom wall of the mounting hole, and at least a portion of the partition portion is disposed between two first through holes to separate the two first interfaces.

[0019] By adopting the above solution, the insulating partition can form a physical insulation barrier between the two first through holes and between the two first interfaces, and increase the creepage distance between the two first interfaces. Based on this, the risk of short circuits caused by insufficient creepage distance between the two first interfaces with opposite polarities can be reduced, the insulation isolation between the two first interfaces can be strengthened, and the electrical connection reliability and operational reliability of the power distribution device can be improved. Furthermore, the partition can also separate and limit the wiring harnesses passing through the first through holes, reducing wiring confusion caused by cross-contact of the wiring harnesses, thereby standardizing the wiring harness layout path, reducing the risk of the wiring harnesses detaching from the first interfaces due to shaking or displacement, and improving the stability, reliability, and durability of the electrical connection.

[0020] In some embodiments, the relay body and the bottom wall of the mounting hole are spaced apart, and a portion of the partition is located between the relay body and the bottom wall of the mounting hole.

[0021] By adopting the above solution, when the relay body and the bottom wall of the mounting hole are spaced apart, by placing part of the partition between the relay body and the bottom wall of the mounting hole, the creepage path formed between the two first interfaces along the gap can be blocked within the gap space between the relay body and the bottom wall of the mounting hole via the corresponding part of the partition, thereby strengthening the insulation isolation effect between the two first interfaces. Furthermore, the corresponding part of the partition separates and limits the wire harness that enters the gap, thereby reducing the shaking and displacement of the wire harness within the gap, thus improving the electrical connection stability, electrical connection reliability, and operational reliability of the power distribution device.

[0022] In some embodiments, with the axial direction of the relay body as the projection direction, the projected area of ​​the first through hole is greater than the projected area of ​​the first interface.

[0023] By adopting the above solution, and making the projected area of ​​the first through hole larger than that of the first interface, a larger operational redundancy space can be provided for the "wire harness passing through the first through hole and connecting to the first interface," thereby reducing the difficulty of wiring operations and improving the convenience and efficiency of wiring operations. Furthermore, the larger projected area of ​​the first through hole can accommodate wire harness connectors of different specifications, thus enhancing structural versatility. Additionally, the larger projected area of ​​the first through hole reduces interference from its edges during the wire threading process, reducing the risk of wear on the wire harness sheath, thereby maintaining the stability and reliability of the electrical connection.

[0024] In some embodiments, the external thread and the internal thread are thermally connected.

[0025] By adopting the above scheme, the external thread of the relay body and the internal thread of the base are not only connected by threads but also thermally conductive. Based on this, an efficient heat conduction path can be constructed between the relay body and the base through the meshing contact between the external and internal threads. This facilitates the rapid conduction of heat generated during relay operation to the base for heat dissipation. This optimizes and expands the heat dissipation area and performance between the relay body and the base, improves heat dissipation efficiency, reduces heat accumulation inside the relay, reduces the risk of performance degradation or device damage due to high temperature, and enhances the relay's performance, reliability, and service life in high-temperature and high-power environments. It also improves the stability and reliability of power distribution equipment.

[0026] In some embodiments, the relay body includes a threaded portion and a protrusion connected axially, with an external thread provided on the threaded portion, the threaded portion being threaded into the mounting hole, and the protrusion protruding out of the opening of the mounting hole.

[0027] By adopting the above solution, a stable connection between the relay body and the base can be achieved through the threaded engagement of the screw portion of the relay body with the mounting hole, thereby improving the structural stability after assembly, maintaining the advantage of convenient assembly and disassembly, and facilitating later maintenance and replacement. Furthermore, the protruding portion of the relay body provides operating space, allowing operators to easily grip or use tools (such as wrenches) to tighten the relay body, quickly completing the assembly, fixing, or disassembly of the relay, thus improving the convenience and efficiency of relay assembly and subsequent maintenance. Moreover, based on the layout of the protruding portion extending beyond the mounting hole opening, the interface component (such as a second interface component) can be positioned on the side of the protruding portion facing away from the screw portion. This allows the interface component to avoid contact with the base and minimizes structural interference, providing a flexible and reasonable installation position for the interface component.

[0028] In some embodiments, the power distribution device includes a washer fitted around the outer periphery of the relay body and stopping between the protrusion and the opening of the mounting hole.

[0029] By adopting the above solution, when the threaded part and the mounting hole are properly threaded, the washer can be stopped between the protrusion and the opening of the mounting hole. The washer can use the pre-tightening force generated by its own elastic deformation to effectively counteract the loosening tendency of the relay body caused by vibration and impact. This can improve the connection stability, connection reliability and anti-loosening reliability of the threaded connection between the relay body and the base, and can better cope with long-term vibration or impact environment.

[0030] Secondly, a battery device is provided, including the power distribution device provided in the embodiments of this application.

[0031] By adopting the above solution, the battery device can improve its operational stability and reliability by applying the power distribution device provided in the embodiments of this application.

[0032] Thirdly, an electrical device is provided, including the power distribution device provided in the embodiments of this application, and / or, including the battery device provided in the embodiments of this application.

[0033] By adopting the above solutions, electrical equipment can improve its operational stability and reliability by applying the battery device or power distribution device provided in the embodiments of this application. Attached Figure Description

[0034] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0036] Figure 2 This is an exploded view of a battery device provided in some embodiments of this application;

[0037] Figure 3 This is an exploded view of a power distribution device provided in some embodiments of this application;

[0038] Figure 4 for Figure 3 A front view of the power distribution unit provided;

[0039] Figure 5 for Figure 4 The provided sectional view along AA;

[0040] Figure 6 Top view of a power distribution device provided in some embodiments of this application;

[0041] Figure 7 for Figure 6 Provided sectional view along BB;

[0042] Figure 8 This is a cross-sectional view of a power distribution device provided in some other embodiments of this application, wherein the power distribution device includes washers.

[0043] The following are the labeling elements in the figure:

[0044] 1-Battery unit, 2-Controller, 3-Motor, 10-Battery cell assembly, 11-Battery cell, 20-Casing, 21-First casing, 22-Second casing, 30-Power distribution unit, 31-Base, 311-Mounting hole, 3111-Internal thread, 3112-Bottom wall of mounting hole, 3113-First through hole, 312-Separator, 32-Relay, 321-Relay body, 3211-External thread, 3212-Threaded connection, 3213-Protrusion, 322-First interface assembly, 3221-First interface, 323-Second interface assembly, 33-Washer, y-Axial direction of relay body. Detailed Implementation

[0045] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clear, the application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0046] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] Furthermore, the terms "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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] Electrical equipment can refer to devices that use batteries as their power source. The power source provides electrical energy to the electrical equipment, thereby driving its operation. Electrical equipment typically has a power distribution device, which controls the operation of the high-voltage circuits within the equipment. Here, "voltage" in high-voltage circuit refers to voltage, and a high-voltage circuit is a circuit with a voltage exceeding 60V. For example, the power distribution device can be a high-voltage distribution box, which is responsible for the power distribution and management of the high-voltage circuits in the electrical equipment. For instance, it is used in new energy vehicles as a PDU (Power Distribution Unit). The PDU's function is to manage the power distribution in the high-voltage circuits of new energy vehicles, providing functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control, protecting and monitoring the operation of the high-voltage system. High-voltage distribution boxes can also be used in battery devices to control the charging and discharging of the battery, for example, for charging and discharging control of the battery device, or as a BDU (Battery Disconnect Unit) specifically designed for battery devices.

[0050] A power distribution unit typically includes a base, a relay, and a cover. The base has a receiving cavity in which the relay is housed. The cover connects to the base and closes the opening of the receiving cavity to secure the relay within the cavity. In some cases, the cover uses a snap-fit ​​mechanism to engage with the base. However, under complex operating conditions such as vehicle bumps, long-term vibration, or severe impacts, the stability of this snap-fit ​​is unreliable, easily leading to loosening or failure of the snap-fit. This can cause the cover to detach from the base, resulting in potential problems such as a loose relay or disconnection of the relay's electrical connection with other components. This affects the installation reliability of the relay and the operational and operational reliability of the power distribution unit. Furthermore, when a relay malfunctions and needs to be removed from the power distribution unit for replacement, the snap-fit ​​mechanism hinders maintenance and disassembly. This can make it difficult to detach the cover, or the snap-fit ​​may be damaged during forced detachment, requiring the cover to be replaced as well. This reduces the ease of maintenance and increases maintenance costs.

[0051] In other cases, the cover is fastened to the threaded hole of the base by screws. However, the assembly process of the screw-fixing method is relatively complicated, and the number of parts required is large and the cost is high. Moreover, since the wall of the base used to make the threaded hole needs to have a large wall thickness, and since the cover and screw head need to occupy a certain space, this installation method requires a large space inside the power distribution device, resulting in low utilization of the internal space of the power distribution device and is not conducive to the miniaturization of the power distribution device.

[0052] Therefore, some embodiments of this application provide a power distribution device. This device features a circular mounting hole in the base with internal threads on the hole wall, and a cylindrical relay body with external threads on its outer wall that mate with the internal threads. This allows the relay body to be directly threaded into the mounting hole, enabling direct threaded connection between the relay body and the base without the need for a cover, clips, or screws to secure the relay. This simplifies and optimizes the installation and connection method between the relay and the base. The threaded engagement and self-locking between the threads enhance the connection's robustness, improving installation stability and reliability. Under complex conditions such as vehicle bumps, long-term vibration, or severe impacts, it reduces the risk of relay loosening or electrical disconnection from other components, thus improving the operational stability and reliability of the power distribution device. Furthermore, it eliminates the need for covers, clips, or screws, simplifying the device's structure, reducing manufacturing complexity, and lowering material and production costs. Furthermore, it allows for convenient, fast, and reliable assembly of the relay and base, eliminating the need for prior positioning and adjustment steps (such as "positioning and adjustment of the clips and bayonets," and "positioning and adjustment of the fastening holes for the relay and base to be connected by the same screw") before fastening, as is common in related technologies. This reduces assembly steps, simplifies assembly operations, shortens assembly time, reduces reliance on manual labor, and improves the ease and efficiency of relay assembly. It also facilitates the disassembly, maintenance, and replacement of the relay, thereby improving the maintainability and convenience of the relay and power distribution device, and reducing maintenance costs. Moreover, the base's enclosure wall, which forms the mounting hole and has internal threads, does not need to have a large wall thickness, and the space required for the cover and screw head along the relay body's axial direction can be eliminated. This reduces the installation space required and the space occupied by the relay in the power distribution device, especially along the relay body's axial direction, compressing the height of the power distribution device at the relay mounting location. This helps to reduce the overall size of the power distribution device, especially its height, facilitating miniaturization and integration.

[0053] The power distribution device disclosed in this application can be used to manage the power distribution of high-voltage circuits in electrical equipment, and can also be applied to battery devices to control the charging and discharging of the battery devices. The battery devices disclosed in this application can be used in electrical equipment that uses battery devices as a power source, or in various energy storage systems that use battery devices as energy storage elements. Electrical equipment can be, but is not limited to, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric vehicles, electric toys, and power tools, etc. Vehicles can be gasoline vehicles, natural gas vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0054] To illustrate the technical solution provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments, taking "electrical equipment as a vehicle" as an example.

[0055] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 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 1 is installed inside the vehicle, and the battery device 1 can be located at the bottom, front, or rear of the vehicle. The battery device 1 is used to supply power to the vehicle; for example, the battery device 1 can serve as the vehicle's operating power source for the vehicle's electrical system, such as for the power needs of starting, navigation, and driving. The vehicle may also include a controller 2 and a motor 3, with the controller 2 controlling the battery device 1 to supply power to the motor 3.

[0056] In some embodiments of this application, the battery device 1 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0057] Please see Figure 2 , Figure 2This is an exploded view of a battery device 1 provided in some embodiments of this application. The battery device 1 may include one or more battery cell assemblies 10 for providing voltage and capacity. Each battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar. Mixed connection refers to a configuration involving both series and parallel connections. Each battery cell 11 may be a rechargeable battery, meaning it can be recharged after discharge to activate its active materials and continue to be used. The battery cell 11 may be a lithium-ion battery cell, sodium-ion battery cell, sodium-lithium-ion battery cell, lithium metal battery cell, sodium metal battery cell, lithium-sulfur battery cell, magnesium-ion battery cell, nickel-metal hydride battery cell, nickel-cadmium battery cell, lead-acid battery cell, etc. The battery cell 11 may be cylindrical, flat, cuboid, or other shapes. The battery cell 11 may be packaged in different ways to form cylindrical, square, or pouch battery cells, etc.

[0058] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11. As an example, the battery cell assembly 10 may be a battery module, which is formed by arranging and fixing a plurality of battery cells 11 into a single module. As an example, a battery module may be formed by bundling a plurality of battery cells 11 together with cable ties.

[0059] In some embodiments, the battery device 1 may be a battery pack, which includes a housing 20 and one or more battery cell assemblies 10, the battery cell assemblies 10 being housed within the housing 20. The housing 20 provides storage space for components such as the battery cell assemblies 10, and can provide dustproof, waterproof, and protective protection for the components housed within it, reducing the impact of external liquids or other foreign matter on the effectiveness and performance of the battery cell assemblies 10 and other components, thus effectively extending the service life of the battery device 1. The housing 20 can be of various shapes, such as a cuboid or cylinder. The housing 20 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic.

[0060] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0061] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0062] As an example, the housing 20 may include a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 are fastened together, forming a closed space inside the housing 20 to house the battery cell assembly 10. Here, "closed" refers to covering or shutting off; it can be sealed or unsealed. As an example, the second housing 22 may be a hollow structure with an opening at one end, and the first housing 21 may be a top cover or a bottom plate, with the first housing 21 covering the open side of the second housing 22. As an example, both the first housing 21 and the second housing 22 may be hollow structures with an opening on one side, with the open side of the first housing 21 covering the open side of the second housing 22.

[0063] As an example, the housing 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 20 forms an enclosed space to house the battery cell assembly 10.

[0064] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0065] In some embodiments, the battery device 1 may also include other structures. For example, the battery device 1 may also include a busbar component for connecting multiple battery cells 11 to achieve electrical connection between the multiple battery cells 11.

[0066] Please see Figure 3 , Figure 4 , Figure 5 Some embodiments of this application provide a power distribution device 30, including a base 31 and a relay 32. The base 31 is provided with a mounting hole 311. The relay 32 includes a relay body 321, at least a portion of which is disposed within the mounting hole 311. The mounting hole 311 is a circular hole with an internal thread 3111 on its wall. The relay body 321 is a cylinder, and the outer wall of the portion of the relay body 321 disposed within the mounting hole 311 has an external thread 3211 that mates with the internal thread 3111. The relay body 321 is threadedly connected to the base 31.

[0067] It should be noted that please refer to the following as well. Figure 1 , Figure 2The power distribution device 30 can be used to manage the power distribution of high-voltage circuits in electrical equipment, and can also be applied to the battery device 1 to control the charging and discharging of the battery device 1. Here, "voltage" in "high voltage" refers to a voltage exceeding 60V. For example, the power distribution device 30 can be a high-voltage distribution box, which can be used to manage the power distribution of high-voltage circuits in electrical equipment. For instance, it can be used in new energy vehicles as a PDU (Power Distribution Unit), where the PDU is responsible for power distribution and management in the high-voltage circuits of the new energy vehicle, providing functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control, protecting and monitoring the operation of the high-voltage system. The high-voltage distribution box can also be applied to the battery device 1 to control its charging and discharging, for example, to control the charging and discharging of the battery device 1, or as a BDU (Battery Disconnect Unit) specifically designed for the battery device 1, which can be located inside the enclosure 20 of the battery device 1.

[0068] It should also be noted that the base 31 is the housing component of the power distribution device 30, possessing a certain structural strength and rigidity. The base 31 is provided with at least one mounting hole 311, which can be located on any side of the base 31. In the case of multiple mounting holes 311, they can be located on the same side of the base 31 or on different sides of the base 31. The mounting hole 311 can be a blind hole or a through hole, and it can be used to accommodate and install the relay 32.

[0069] Relay 32 is a key electrical device (i.e., an electrical control device) in the control circuit of the power distribution device 30, playing a crucial role in protection and control. For example, relay 32 can provide overload protection, short-circuit protection, and leakage protection to the controlled equipment, thereby improving the reliability of the controlled equipment. Relay 32 may include a main positive relay, a main negative relay, and a pre-charge relay. Relay 32 includes a relay body 321, at least a portion of which is accommodated and installed within a mounting hole 311. The number of relays 32 may be greater than or equal to the number of mounting holes 311, allowing at least some relays 32 to be installed one-to-one in each mounting hole 311.

[0070] The relay body 321 is cylindrical. The portion of the relay body 321 located within the mounting hole 311 (i.e., the threaded portion 3212 hereinafter) has an external thread 3211 on its outer wall. Correspondingly, the mounting hole 311 is a circular hole, and the hole wall of the mounting hole 311 has an internal thread 3111 that is adapted to and matches the external thread 3211. Based on this, the relay body 321 can be directly threaded into the mounting hole 311 to achieve a threaded connection with the base 31, without the need for a cover, clips, or screws to limit and fix the relay 321 to the base 31. The relay body 321 can be fixed by rotating one revolution or by rotating multiple revolutions.

[0071] In summary, the power distribution device 30 provided in this application embodiment, by making the mounting hole 311 of the base 31 a circular hole and providing an internal thread 3111 on the hole wall of the mounting hole 311, and by making the relay body 321 of the relay 32 cylindrical and providing an external thread 3211 on the outer wall of the relay body 321 that mates with the internal thread 3111, allows the relay body 321 of the relay 32 to be directly threaded into the mounting hole 311, so that the relay body 321 can be directly threaded into the base 31 without the need for a cover, a buckle, or a screw to limit and fix the relay 32 to the base 31. Based on this, the installation and connection method between the relay 32 and the base 31 can be simplified and optimized. The threaded engagement and self-locking between the relay 32 and the base 31 enhance the connection's robustness, thereby improving the installation stability and reliability of the relay 32. This reduces the risk of the relay 32 becoming loose or its electrical connection to other components breaking under complex operating conditions such as vehicle bumps, long-term vibration, or severe impacts, thus improving the operational stability and reliability of the power distribution device 30. Furthermore, the elimination of the cover, clips, or screws eliminates the need for other fastening components, simplifying the structure of the power distribution device 30, reducing manufacturing complexity, and lowering material and production costs. Furthermore, the assembly of relay 32 and base 31 can be achieved conveniently, quickly, and reliably, eliminating the need for positioning and adjustment steps (such as "positioning and adjustment of the clips and bayonets" and "positioning and adjustment of the fastening holes for the relay 32 and base 31 to be connected by the same screw") before fastening, as is common in related technologies. This reduces assembly steps, simplifies assembly operations, shortens assembly time, reduces reliance on manual labor, and improves the ease and efficiency of assembling relay 32. Moreover, it facilitates the disassembly, maintenance, and replacement of relay 32, thereby improving the maintainability and convenience of relay 32 and power distribution device 30, and reducing maintenance costs. Furthermore, the enclosure wall of the base 31, which is used to enclose the mounting hole 311 and has internal threads 3111, does not need to have a large wall thickness. Moreover, the space required for the cover and screw head can be eliminated along the axial direction y of the relay body. This can reduce the installation space and space occupied by the relay 32 in the power distribution device 30. In particular, it can reduce the height of the power distribution device 30 at the location of the relay 32 along the axial direction y of the relay body. This is beneficial to reducing the overall size of the power distribution device 30, especially its height, and is conducive to the miniaturization and integration of the power distribution device 30.

[0072] Furthermore, the design of this embodiment is applicable to relays 32 of different specifications and types, has good versatility, and can meet the needs of various application scenarios.

[0073] Please see Figure 3 , Figure 5 , Figure 6 ,Figure 7 In some embodiments of this application, the relay 32 includes a first interface component 322 and a second interface component 323, which are disposed on the same side or opposite sides of the relay body 321 along the axial direction.

[0074] It should be noted that one of the first interface component 322 and the second interface component 323 is used to connect to the control circuit, and the other is used to connect to the controlled circuit. The control circuit refers to the circuit module that outputs control signals to drive the internal switching elements of the relay 32. It may consist of a control chip, a drive unit, a power supply module, etc., and can receive external commands or detection signals. By changing its own output level or current, it achieves precise control over the closed and open states of the relay 32. The controlled circuit refers to the power circuit that carries the actual electrical load of the power distribution device 30. For example, it could be the power supply circuit for high-power electrical equipment such as a car's lighting system or battery management system. The on / off state of the controlled circuit is determined by the operating state of the internal switching elements of the relay 32.

[0075] The first interface component 322 is located on one side of the relay body 321 along the axial direction, and the second interface component 323 is located on one side of the relay body 321 along the axial direction. That is, along the axial direction y of the relay body, the first interface component 322 and the second interface component 323 can be located on the same side of the relay body 321, or they can be located on opposite sides of the relay body 321. This arrangement facilitates wiring operations of the first interface component 322 and the second interface component 323 along the axial direction y of the relay body.

[0076] By adopting the above scheme, the threaded connection area between the relay body 321 and the base 31 can be avoided. The first interface component 322 and the second interface component 323 are arranged along the axial direction y of the relay body. The first interface component 322 and the second interface component 323 can be flexibly set on the same side or opposite sides according to actual needs. Based on this, it can avoid spatial interference between the interface components (i.e., the first interface component 322 and the second interface component 323) and the threaded connection structure (i.e., the internal thread 3111 and the external thread 3211), so as to maintain the smooth assembly of the threaded connection between the relay body 321 and the base 31. It can also flexibly adjust the interface layout according to the actual wiring needs of the power distribution device 30, which facilitates the wiring operation and debugging of the first interface component 322 and the second interface component 323 along the axial direction y of the relay body, and helps to improve the convenience and adaptability of wiring operation.

[0077] Please see Figure 3 , Figure 5 , Figure 7In some embodiments of this application, the first interface component 322 and the second interface component 323 are respectively disposed on opposite sides of the relay body 321 along the axial direction. That is, along the axial direction y of the relay body, the first interface component 322 is disposed on one side of the relay body 321, and the second interface component 323 is disposed on the other side of the relay body 321.

[0078] By adopting the above scheme, and by distributing the first interface component 322 and the second interface component 323 on opposite sides of the relay body 321 along the axial direction, on the one hand, the first interface component 322 and the second interface component 323 can be distributed by utilizing the two ends of the relay body 321 along the axial direction, so as to avoid the threaded connection area between the relay body 321 and the base 31 and maintain the smoothness of the threaded connection assembly, and reduce the structural interference and signal interference that may be caused by the first interface component 322 and the second interface component 323 being set on the same side, so that the first interface component 322 and the second interface component 323 each have independent assembly space and wiring space, which can improve the design flexibility and structural reliability of the relay 32. On the other hand, it can achieve a clear partitioned layout of the first interface component 322 and the second interface component 323, forming a foolproof design. It can facilitate the wiring operation of the first interface component 322 and the second interface component 323 from both ends of the axial direction of the relay body 321, facilitate the quick partitioning of wiring objects, and efficiently complete the wiring operation. It can avoid the wiring confusion of the first interface component 322 and the second interface component 323, reduce the risk of incorrect wiring, and improve the convenience, accuracy and standardization of wiring operation.

[0079] Of course, in other embodiments, the first interface component 322 and the second interface component 323 may be located on the same side of the relay body 321 along the axial direction. In this case, care should be taken to distinguish between the "interface component for connecting the control circuit" and the "interface component for connecting the controlled circuit" when wiring, and care should be taken to avoid wiring confusion.

[0080] Please see Figure 3 , Figure 5 , Figure 7 In some embodiments of this application, the mounting hole 311 is a blind hole, and the first interface component 322 is disposed on the side of the relay body 321 facing the bottom wall 3112 of the mounting hole. The first interface component 322 includes two first interfaces 3221 with opposite polarities and spaced apart. The bottom wall 3112 of the mounting hole is provided with two first through holes 3113, and the two first through holes 3113 are provided in a one-to-one correspondence with the two first interfaces 3221.

[0081] It should be noted that the mounting hole 311 is a blind hole rather than a through hole, so that the bottom wall 3112 of the mounting hole can provide a certain degree of protection for the part of the relay body 321 located in the mounting hole 311.

[0082] The first interface component 322 is located on the bottom wall 3112 of the relay body 321 facing the mounting hole, placing it in a relatively concealed space. This allows the bottom wall 3112 of the mounting hole to provide some protection for the first interface component 322, reducing the risk of damage caused by external impacts or friction. The first interface component 322 includes two first interfaces 3221. The two first interfaces 3221 have opposite polarities; one is a positive interface, and the other is a negative interface. The two first interfaces 3221 are spaced apart to reduce the risk of short circuits between the positive and negative interfaces, thus maintaining the stability and reliability of the electrical connection.

[0083] The bottom wall 3112 of the mounting hole is provided with two first through holes 3113, which penetrate the bottom wall 3112 of the mounting hole. The first through holes 3113 can be circular, rectangular, or other shaped holes, and their size can be flexibly set as needed. When the relay body 321 and the base 31 are threadedly connected, the two first through holes 3113 are correspondingly and aligned with the two first interfaces 3221, so that the first through holes 3113 can provide a wiring channel for the corresponding first interfaces 3221. This allows the wire harness to be directly connected to the corresponding first interface 3221 through the first through holes 3113 without additional positioning, adjustment, winding, or conversion steps, thereby simplifying the assembly process of the power distribution device 30. The wire harness and the first interface 3221 can be connected by, but is not limited to, welding. The proper threaded connection between the relay body 321 and the base 31 can be determined by methods such as "full fit between the external thread 3211 and the internal thread 3111" and "measuring the force applied to the relay 32 during tightening". The proper threaded connection between the relay body 321 and the base 31 can be verified by observing the alignment of the first through hole 3113 and the first interface 3221. When the relay body 321 and the base 31 are properly threaded connected, the relay body 321 can be in contact with or spaced from the bottom wall 3112 of the mounting hole.

[0084] By adopting the above solution, the first interface component 322 can be screwed into the mounting hole 311 along with the relay body 321 and arranged close to the bottom wall 3112 of the mounting hole. This facilitates the protection of the first interface component 322 by the bottom wall 3112 of the mounting hole, reducing the corrosion of the first interface component 322 by external dust and moisture, thereby improving the reliability and service life of the first interface component 322. Furthermore, the wire harness can be conveniently, quickly, and reliably connected to the corresponding first interface 3221 through the first through hole 3113, which corresponds to the first interface 3221, without the need for additional positioning, adjustment, winding, or conversion steps. This allows for convenient, quick, stable, and reliable connection between the first interface 3221 and the internal circuit of the power distribution device 30, simplifies the assembly process of the power distribution device 30, saves assembly time and labor, and improves overall assembly efficiency. Furthermore, by setting two first interfaces 3221 with opposite polarities apart and connecting them independently through the first through hole 3113, the risk of polarity confusion and short circuit between the two first interfaces 3221 can be reduced, thereby maintaining the stability and reliability of the electrical connection and improving the structural reliability and operational reliability of the power distribution device 30.

[0085] Please see Figure 3 , Figure 5 , Figure 7 In some embodiments of this application, the two first interfaces 3221 are respectively embedded in the relay body 321.

[0086] By adopting the above solution, and by embedding the two first interfaces 3221 into the relay body 321 respectively, the first interfaces 3221 can be made to not protrude from the side of the relay body 321 facing the bottom wall of the mounting hole 311. Based on this, when the relay body 321 and the base 31 are threadedly connected in place, the relay body 321 can be as close as possible to or even in contact with the bottom wall 3112 of the mounting hole without interference from the first interfaces 3221. This reduces the risk of structural interference between the first interfaces 3221 and the bottom wall 3112 of the mounting hole, and reduces the assembly gap caused by the protrusion of the first interfaces 3221, thereby improving the compactness and stability of the connection between the relay 32 and the base 31. Furthermore, since the distance between the relay body 321 and the bottom wall of the mounting hole 311 can be significantly reduced, the distance between the first interface 3221 and the first through hole 3113 can be shortened. This allows the wiring harness to pass through the first through hole 3113 and quickly connect to the first interface 3221 without additional adjustment of the wiring harness routing or length, enabling smooth and efficient wiring operations and optimizing wiring efficiency. Moreover, based on the embedded layout, the insulating material of the relay body 321 itself can physically isolate the two first interfaces 3221 with opposite polarities, increasing the creepage distance between the two first interfaces 3221. This reduces the risk of short circuits caused by direct contact or insufficient creepage distance between the two first interfaces 3221, strengthens the insulation isolation between the two first interfaces 3221, and improves the electrical connection reliability and operational reliability of the power distribution device 30.

[0087] This embodiment is applicable to the situation where "the relay body 321 is in contact with the bottom wall 3112 of the mounting hole when the relay body 321 and the base 31 are threadedly connected in place". Of course, it is also applicable to the situation where "the relay body 321 and the base 31 are threadedly connected in place when the relay body 321 and the bottom wall 3112 of the mounting hole are spaced apart".

[0088] Please see Figure 3 , Figure 5 , Figure 7 In some embodiments of this application, the base 31 includes a partition 312, which is an insulating part. The partition 312 is disposed on the bottom wall 3112 of the mounting hole, and at least a portion of the partition 312 is disposed between two first through holes 3113 to separate two first interfaces 3221.

[0089] It should be noted that the partition 312 is an insulating part, meaning it includes insulating material, has insulating properties, and can perform insulating functions. The partition 312 is disposed on the bottom wall 3112 of the mounting hole, and the partition 312 and the bottom wall 3112 of the mounting hole can be integrally connected or separately connected. At least a portion of the partition 312 is disposed between the two first through holes 3113 (the portion of the bottom wall of the mounting hole 311 disposed between the two first through holes 3113 can be considered as at least a portion of the partition 312), so that the partition 312 can be separated between the two first through holes 3113 and between the two first interfaces 3221. The partition 312 can be in the form of, but is not limited to, a plate, a strip, or a frame.

[0090] By adopting the above solution, the insulating partition 312 can form a physical insulation barrier between the two first through holes 3113 and between the two first interfaces 3221, and increase the creepage distance between the two first interfaces 3221. Based on this, the risk of short circuit caused by insufficient creepage distance between the two first interfaces 3221 with opposite polarities can be reduced, the insulation isolation between the two first interfaces 3221 can be strengthened, and the electrical connection reliability and operational reliability of the power distribution device 30 can be improved. Furthermore, the partition 312 can also separate and limit the wire harness passing through the first through hole 3113 to reduce wiring confusion caused by wire harness cross contact, thereby standardizing the wire harness layout path, reducing the risk of the wire harness coming off the first interface 3221 due to shaking or displacement, and improving the stability, reliability, and durability of the electrical connection.

[0091] Please see Figure 3 , Figure 6 , Figure 7 In some embodiments of this application, the relay body 321 and the bottom wall 3112 of the mounting hole are spaced apart, and part of the partition 312 is located between the relay body 321 and the bottom wall 3112 of the mounting hole.

[0092] It should be noted that when the relay body 321 and the base 31 are threadedly connected, the relay body 321 is spaced apart from the bottom wall 3112 of the mounting hole. In this case, a portion of the partition 312 may be located between the relay body 321 and the bottom wall 3112 of the mounting hole to enhance the insulation effect between the two first interfaces 3221 within the gap space between the relay body 321 and the bottom wall of the mounting hole 311. In some embodiments, this portion of the partition 312 may be supported between the relay body 321 and the bottom wall 3112 of the mounting hole. In other embodiments, this portion of the partition 312 may be connected to the bottom wall 3112 of the mounting hole and spaced apart from the relay body 321.

[0093] By adopting the above solution, when the relay body 321 and the bottom wall 3112 of the mounting hole are spaced apart, by placing part of the partition 312 between the relay body 321 and the bottom wall 3112 of the mounting hole, the creepage path formed between the two first interfaces 3221 along the gap can be blocked through the corresponding part of the partition 312 in the gap space between the relay body 321 and the bottom wall of the mounting hole 311, thereby strengthening the insulation isolation effect between the two first interfaces 3221. Furthermore, the corresponding part of the partition 312 separates and limits the wire harness that enters the gap, thereby reducing the shaking and displacement of the wire harness in the gap. This improves the electrical connection stability, electrical connection reliability, and operational reliability of the power distribution device 30.

[0094] Of course, in other embodiments, as needed, a portion of the partition 312 may be located on the outside of the bottom wall of the mounting hole 311, facing away from the relay body 321.

[0095] Please see Figure 3 , Figure 6 , Figure 7 In some embodiments of this application, the projection direction is the axial direction y of the relay body, and the projected area of ​​the first through hole 3113 is greater than the projected area of ​​the first interface 3221.

[0096] It should be noted that, with the axis y of the relay body as the projection direction, that is, in the same plane perpendicular to the axis y of the relay body, the projected area of ​​the first through hole 3113 is greater than the projected area of ​​the first interface 3221, regardless of whether the projected shape of the first through hole 3113 is the same as the projected shape of the first interface 3221.

[0097] By adopting the above solution, and making the projected area of ​​the first through hole 3113 larger than that of the first interface 3221, a larger operational redundancy space can be provided for the "wire harness passing through the first through hole 3113 and connecting to the first interface 3221" via the first through hole 3113. This reduces the difficulty of wiring operations and improves the convenience and efficiency of wiring operations. Furthermore, the larger projected area of ​​the first through hole 3113 can accommodate wire harness connectors of different specifications, thereby enhancing structural versatility. Additionally, the larger projected area of ​​the first through hole 3113 reduces interference from its edges during the wire threading process, reducing the risk of wear on the wire harness sheath, thus maintaining the stability and reliability of the electrical connection.

[0098] Of course, such as Figure 5 As shown, in other embodiments, with the axial direction y of the relay body as the projection direction, the projected area of ​​the first through hole 3113 may be less than or equal to the projected area of ​​the first interface 3221.

[0099] Please see Figure 3 , Figure 7In some embodiments of this application, the external thread 3211 and the internal thread 3111 are thermally connected.

[0100] It should be noted that at least the external thread 3211 of the relay body 321 includes a thermally conductive material, has thermal conductivity, and can perform thermal conductivity. Even the internal thread 3111 of the base 31 includes a thermally conductive material, has thermal conductivity, and can perform thermal conductivity, so that the external thread 3211 of the relay body 321 and the internal thread 3111 of the base 31 are thermally connected on the basis of threaded connection.

[0101] By adopting the above scheme, the external thread 3211 of the relay body 321 and the internal thread 3111 of the base 31 are not only connected by threads but also thermally conductive. Based on this, an efficient heat conduction path can be constructed between the relay body 321 and the base 31 through the meshing contact between the external thread 3211 and the internal thread 3111. This facilitates the rapid conduction of heat generated during the operation of the relay 32 to the base 31 for heat dissipation. This optimizes and expands the heat dissipation area and performance between the relay body 321 and the base 31, improves heat dissipation efficiency, reduces heat accumulation inside the relay 32, reduces the risk of performance degradation or device damage due to high temperature, improves the performance, reliability, and service life of the relay 32 in high temperature and high power environments, and enhances the stability and reliability of the power distribution device 30.

[0102] Please see Figure 3 , Figure 5 , Figure 7 , Figure 8 In some embodiments of this application, the relay body 321 includes a threaded portion 3212 and a protrusion 3213 connected axially. An external thread 3211 is provided on the threaded portion 3212. The threaded portion 3212 is threadedly connected to the mounting hole 311, and the protrusion 3213 protrudes out of the opening of the mounting hole 311.

[0103] It should be noted that the screwed part 3212 is the part of the relay body 321 with external thread 3211 that is threaded into the mounting hole 311, and the protruding part 3213 is the part of the relay body 321 without external thread 3211 that protrudes out of the opening of the mounting hole 311. The screwed part 3212 and the protruding part 3213 are connected integrally (or separately) along the axial direction y of the relay body.

[0104] By adopting the above scheme, the screw portion 3212 of the relay body 321 engages with the mounting hole 311 to achieve a stable connection between the relay body 321 and the base 31, thereby improving the structural stability after assembly, maintaining the advantage of convenient assembly and disassembly, and facilitating later maintenance and replacement. Furthermore, the protrusion 3213 of the relay body 321 provides operating space, allowing operators to easily grip or use tools (such as wrenches) to tighten the relay body 321, quickly completing the assembly, fixing, or disassembly of the relay 32, thus improving the convenience and efficiency of the relay 32's assembly and later maintenance. Moreover, based on the layout of the protrusion 3213 extending beyond the opening of the mounting hole 311, the interface component (e.g., the second interface component 323) can be positioned on the side of the protrusion 3213 facing away from the screw portion 3212, allowing the interface component to avoid contact with the base 31 and minimizing structural interference, thus providing a flexible and reasonable installation position for the interface component.

[0105] Of course, in other embodiments, the relay body 321 may only have a screw portion 3212 without a protrusion 3213, and the relay body 321 may not protrude from the opening of the mounting hole 311. In this case, the interface component (e.g., the second interface component 323) located on the side of the relay body 321 facing the opening of the mounting hole 311 needs to be carefully adjusted in position and spatial layout to avoid structural interference with the base 31. In this case, a first groove can be provided on the side of the relay body 321 facing the opening of the mounting hole 311. The first groove may be, but is not limited to, a cross groove, a plus / minus groove, a slotted groove, an internal triangular groove, an internal hexagonal groove, a Torx groove, a Torx slotted groove, etc., for external tools to drive the relay body 321 to rotate via the first groove, thereby conveniently and quickly installing and removing the relay body 321 from the mounting hole 311.

[0106] Please see Figure 8 In some embodiments of this application, the power distribution device 30 includes a washer 33, which is sleeved on the outer periphery of the relay body 321 and stops between the protrusion 3213 and the opening of the mounting hole 311.

[0107] It should be noted that when the relay body 321 has a protrusion 3213, a washer 33 can be fitted around the outer periphery of the relay body 321. This allows the washer 33 to stop between the protrusion 3213 and the opening of the mounting hole 311 when the screw connection 3212 is threadedly engaged with the mounting hole 311 (i.e., the relay body 321 and the base 31 are threadedly connected).

[0108] By adopting the above solution, when the threaded part 3212 and the mounting hole 311 are properly threaded, the washer 33 can be stopped between the protrusion 3213 and the opening of the mounting hole 311. This allows the washer 33 to effectively counteract the loosening tendency of the relay body 321 caused by vibration and impact by utilizing the pre-tightening force generated by its own elastic deformation. This improves the connection stability, connection reliability, and anti-loosening reliability of the threaded connection between the relay body 321 and the base 31, and can better cope with long-term vibration or impact environments.

[0109] Of course, in other embodiments, the power distribution device 30 may omit the washer 33 and achieve the anti-loosening installation of the relay 32 solely through threaded self-locking.

[0110] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 Based on the above embodiments, this application provides a specific example of a power distribution device 30. The power distribution device 30 includes a base 31 and a relay 32.

[0111] The base 31 has a mounting hole 311, which is circular and has an internal thread 3111 on its wall. The mounting hole 311 is a blind hole. The relay 32 includes a relay body 321, a first interface assembly 322, and a second interface assembly 323. The relay body 321 includes a threaded portion 3212 and a protrusion 3213 connected axially. The relay body 321 (especially the threaded portion 3212) is cylindrical. The outer wall of the threaded portion 3212 (i.e., the part of the relay body 321 located in the mounting hole 311) has an external thread 3211 that mates with the internal thread 3111. The threaded portion 3212 is threadedly connected to the mounting hole 311 (i.e., the relay body 321 is threadedly connected to the base 31), and the external thread 3211 and the internal thread 3111 are thermally connected. The protrusion 3213 protrudes out of the opening of the mounting hole 311. The first interface component 322 and the second interface component 323 are respectively disposed on opposite sides of the relay body 321 along the axial direction. The first interface component 322 is disposed on the side of the screw portion 3212 facing the bottom wall 3112 of the mounting hole, and the second interface component 323 is disposed on the side of the protrusion 3213 facing away from the screw portion 3212.

[0112] The first interface component 322 includes two first interfaces 3221 with opposite polarities and spaced apart, each first interface 3221 being embedded within the relay body 321. The bottom wall 3112 of the mounting hole is provided with two through holes 3113, each corresponding to one of the two first interfaces 3221. With the axial direction y of the relay body as the projection direction, the projected area of ​​the first through hole 3113 is larger than the projected area of ​​the first interface 3221.

[0113] The base 31 includes a partition 312, which is an insulating part. The partition 312 is disposed on the bottom wall 3112 of the mounting hole, and at least a portion of the partition 312 is disposed between two first through holes 3113 to separate two first interfaces 3221. The relay body 321 is spaced apart from the bottom wall 3112 of the mounting hole, and a portion of the partition 312 is located between the relay body 321 and the bottom wall 3112 of the mounting hole.

[0114] Therefore, the power distribution device 30 allows the relay body 321 of the relay 32 to be directly threaded into the mounting hole 311, enabling the relay body 321 to be directly threaded to the base 31 without the need for a cover, clips, or screws to limit and fix the relay 32 to the base 31. Based on this, the installation and connection method between the relay 32 and the base 31 can be simplified and optimized. The thread engagement and self-locking between the relay 32 and the base 31 improve the connection stability, reliability, and anti-loosening reliability, thereby enhancing the installation stability and reliability of the relay 32. Under complex operating conditions such as vehicle bumps, long-term vibration, or severe impacts, the risk of the relay 32 loosening or disconnection from other components is reduced, improving the operational stability and reliability of the power distribution device 30. Furthermore, the elimination of covers, clips, or screws simplifies the structure of the power distribution device 30, reduces manufacturing complexity, and lowers material and production costs. Furthermore, the assembly of relay 32 and base 31 can be achieved conveniently, quickly, and reliably, eliminating the need for positioning and adjustment steps (such as "positioning and adjustment of the clips and bayonets" and "positioning and adjustment of the fastening holes for the relay 32 and base 31 to be connected by the same screw") before fastening, as is common in related technologies. This reduces assembly steps, simplifies assembly operations, shortens assembly time, reduces reliance on manual labor, and improves the ease and efficiency of assembling relay 32. Moreover, it facilitates the disassembly, maintenance, and replacement of relay 32, thereby improving the maintainability and convenience of relay 32 and power distribution device 30, and reducing maintenance costs. Furthermore, the enclosure wall of the base 31, which is used to enclose the mounting hole 311 and has internal threads 3111, does not need to have a large wall thickness. Moreover, the space required for the cover and screw head can be eliminated along the axial direction y of the relay body. This can reduce the installation space and space occupied by the relay 32 in the power distribution device 30. In particular, it can reduce the height of the power distribution device 30 at the location of the relay 32 along the axial direction y of the relay body. This is beneficial to reducing the overall size of the power distribution device 30, especially its height, and is conducive to the miniaturization and integration of the power distribution device 30.

[0115] Furthermore, it facilitates wiring operations for the first interface component 322 and the second interface component 323 from both axial ends of the relay body 321, enabling quick and efficient division of wiring objects and avoiding confusion between the first interface component 322 and the second interface component 323. This reduces the risk of incorrect wiring and improves the convenience, accuracy, standardization, and efficiency of wiring operations. Additionally, it reduces the risk of short circuits caused by direct contact or insufficient creepage distance between the two first interfaces 3221, strengthens the insulation between the two first interfaces 3221, and improves the electrical connection stability, electrical connection reliability, and operational reliability of the power distribution device 30.

[0116] Furthermore, an efficient heat conduction path can be constructed between the relay body 321 and the base 31 through the meshing contact between the external thread 3211 and the internal thread 3111. This facilitates the rapid conduction of heat generated during the operation of the relay 32 to the base 31 for heat dissipation. This optimizes and expands the heat dissipation area and performance between the relay body 321 and the base 31, improves heat dissipation efficiency, reduces heat accumulation inside the relay 32, reduces the risk of performance degradation or device damage due to high temperature, enhances the performance, reliability, and service life of the relay 32 in high temperature and high power environments, and improves the stability and reliability of the power distribution device 30.

[0117] This embodiment is particularly suitable for high-requirement scenarios such as new energy vehicles and industrial equipment power systems, and has significant engineering application value.

[0118] Please see Figure 2 , Figure 3 Some embodiments of this application provide a battery device 1, including the power distribution device 30 provided in the embodiments of this application.

[0119] By adopting the above solution, the battery device 1 can improve its operational stability and reliability by applying the power distribution device 30 provided in the embodiments of this application.

[0120] Please see Figure 1 , Figure 2 , Figure 3 Some embodiments of this application provide an electrical device, including a power distribution device 30 provided in the embodiments of this application, and / or a battery device 1 provided in the embodiments of this application.

[0121] By adopting the above solution, the electrical equipment can improve its operational stability and reliability by using the battery device 1 or power distribution device 30 provided in the embodiments of this application.

[0122] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A power distribution device, characterized in that, include: The base is equipped with mounting holes; A relay, including a relay body, at least a portion of which is disposed within the mounting hole; The mounting hole is a circular hole with an internal thread on its wall. The relay body is a cylinder with an external thread on the outer wall of the portion of the relay body located inside the mounting hole that mates with the internal thread. The relay body is threadedly connected to the base. The relay includes a first interface component and a second interface component, which are located on the same side or opposite sides of the relay body along the axial direction.

2. The power distribution device as described in claim 1, characterized in that, The first interface component and the second interface component are respectively located on opposite sides of the relay body along the axial direction.

3. The power distribution device as described in claim 1, characterized in that, The mounting hole is a blind hole. The first interface component is located on the bottom wall of the relay body facing the mounting hole. The first interface component includes two first interfaces with opposite polarities and spaced apart. The bottom wall of the mounting hole is provided with two first through holes, and the two first through holes correspond one-to-one with the two first interfaces.

4. The power distribution device as described in claim 3, characterized in that, The two first interfaces are respectively embedded in the relay body.

5. The power distribution device as described in claim 3, characterized in that, The base includes a partition portion, which is an insulating portion. The partition portion is disposed on the bottom wall of the mounting hole, and at least a portion of the partition portion is disposed between the two first through holes to separate the two first interfaces.

6. The power distribution device as described in claim 5, characterized in that, The relay body is spaced apart from the bottom wall of the mounting hole, and a portion of the partition is located between the relay body and the bottom wall of the mounting hole.

7. The power distribution device as described in claim 3, characterized in that, With the axial direction of the relay body as the projection direction, the projected area of ​​the first through hole is greater than the projected area of ​​the first interface.

8. The power distribution device as described in any one of claims 1-7, characterized in that, The external thread and the internal thread are thermally connected.

9. The power distribution device as described in any one of claims 1-7, characterized in that, The relay body includes a threaded portion and a protruding portion connected axially. The external thread is provided on the threaded portion, the threaded portion is threaded into the mounting hole, and the protruding portion protrudes out of the opening of the mounting hole.

10. The power distribution device as described in claim 9, characterized in that, The power distribution device includes a washer, which is sleeved on the outer periphery of the relay body and stops between the protrusion and the opening of the mounting hole.

11. A battery device, characterized in that, Includes the power distribution equipment as described in any one of claims 1-10.

12. An electrical appliance, characterized in that, It includes the power distribution device as described in any one of claims 1-10, and / or includes the battery device as described in claim 11.

Images