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 an electric device, a circuit board and an adapter, wherein the electric device comprises a high-voltage conductive part; the circuit board is provided with a conductive plugging part; the adapter comprises a first connecting part and a second connecting part, the first connecting part is made of the same material as the high-voltage conductive part and is electrically connected with the high-voltage conductive part, the second connecting part is made of the same material as the conductive plugging part and is different from the first connecting part, one end of the second connecting part is compactly connected with one end of the first connecting part, and the other end of the second connecting part is tightly connected with the other end of the conductive plugging part. And the other end of the second connecting part is plugged and electrically connected with the conductive plugging part. Based on the above arrangement, the electrochemical corrosion risk can be reduced from multiple dimensions through structure optimization and material adaptation optimization of the adapter, so that the connection reliability between the adapter and the electric device and between the adapter and the circuit board can be improved, the overall use reliability of the power distribution device can be improved, and the service life of the power distribution device can be prolonged.

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] In some cases, the power distribution device includes an electrical component, a circuit board and a transition copper bar. One end of the transition copper bar is connected to a high-voltage aluminum bar of the electrical component through a bolt, and the other end of the transition copper bar is inserted into a spring of the circuit board through a pin, so that the transition copper bar is electrically connected between the electrical component and the circuit board. However, a potential difference is formed between the transition copper bar and the high-voltage aluminum bar connected through the bolt, which causes an electrochemical corrosion risk therebetween. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the application provide a power distribution device, which aims to solve the problem that a potential difference is formed between a transition copper bar and a high-voltage aluminum bar, which causes an electrochemical corrosion risk therebetween.

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

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

[0006] An electrical component, which includes a high-voltage conductive component;

[0007] A circuit board, which is provided with a conductive insertion part;

[0008] A transition component, which includes a first connecting part and a second connecting part. The material of the first connecting part is the same as that of the high-voltage conductive component, and the first connecting part is electrically connected to the high-voltage conductive component. The material of the second connecting part is the same as that of the conductive insertion part, and different from that of the first connecting part. One end of the second connecting part is tightly connected to one end of the first connecting part, and the other end of the second connecting part is inserted into and electrically connected to the conductive insertion part.

[0009] The power distribution device provided by the embodiments of the present application can be conveniently, quickly and reliably mechanically connected and electrically connected with the high-voltage conductive part of the electrical device through the first connecting part of the adapter, and the material of the first connecting part is the same as that of the high-voltage conductive part, so as to eliminate the potential difference between the first connecting part and the high-voltage conductive part and reduce the risk of electrochemical corrosion between the first connecting part and the high-voltage conductive part. The second connecting part of the adapter can be inserted and matched with the conductive plug-in part of the circuit board, so as to conveniently, quickly and reliably realize mechanical connection and electrical connection, and the material of the second connecting part is the same as that of the conductive plug-in part, so as to eliminate the potential difference between the second connecting part and the conductive plug-in part and reduce the risk of electrochemical corrosion between the second connecting part and the conductive plug-in part. The second connecting part and the first connecting part are densely connected by different materials, so that the connection between the second connecting part and the first connecting part is dense, dry, without water vapor invasion channel and without conductive channel. Based on this, even if a potential difference is formed between the second connecting part and the first connecting part due to different materials, electrochemical corrosion phenomenon is not easy to occur between the second connecting part and the first connecting part, thereby reducing the risk of electrochemical corrosion between the second connecting part and the first connecting part. Therefore, the structure and material of the adapter can be optimized from multiple dimensions to reduce the risk of electrochemical corrosion, thereby improving the connection reliability between the adapter and the electrical device, the connection reliability between the adapter and the circuit board, and the overall use reliability and service life of the power distribution device.

[0010] In some embodiments, the first connecting part is an aluminum material part.

[0011] By adopting the above scheme, the aluminum material high-voltage conductive part can be adapted, and based on the good processability and electrical conductivity of the aluminum material, mechanical fixation and stable electrical conduction between the first connecting part and the high-voltage conductive part can be conveniently realized, thereby improving the connection reliability between the first connecting part and the high-voltage conductive part. In addition, compared with precious metals such as copper, the use of aluminum material for the first connecting part and the high-voltage conductive part can significantly reduce the material cost and the overall weight on the premise that the electrical conductivity and mechanical strength meet the high-voltage working condition requirements, which is conducive to the lightweight of the power distribution device. In addition, one of the core characteristics of aluminum material is that a dense aluminum oxide protective film can be naturally formed on the surface, which can effectively isolate the contact between air, water vapor and other corrosive media and the internal matrix, thereby inhibiting the chemical corrosion of the aluminum material itself. Therefore, compared with easily corroded materials such as iron, the use of aluminum material for the first connecting part and the high-voltage conductive part can significantly improve the overall corrosion resistance and reliability.

[0012] In some embodiments, the second connecting part and the conductive plug-in part are elastically abutted.

[0013] By adopting the above scheme, on the basis of the second connecting part and the conductive plug-in part being plug-in matched, the second connecting part and the conductive plug-in part are elastically abutted, on the one hand, a certain buffer margin can be provided by elasticity to adapt to the slight deviation in the plug-in assembly process, and the assembly fault tolerance and operation convenience of the plug-in matching are improved. On the other hand, based on the elastic abutment, the contact surface between the second connecting part and the conductive plug-in part is closely fitted, the risk of loosening or poor contact at the connection between the second connecting part and the conductive plug-in part is reduced, thereby the reliability and durability of the electrical conduction and electrical connection between the second connecting part and the conductive plug-in part can be strengthened, the connection stability and connection reliability of the adapter and the circuit board can be improved, and the structural reliability and operation reliability of the power distribution device can be improved.

[0014] In some embodiments, the second connecting part is a copper material part.

[0015] By adopting the above scheme, the conductive plug-in part of copper material can be adapted, and the potential difference between the second connecting part and the conductive plug-in part can be eliminated by the consistency of the material to reduce the risk of electrochemical corrosion. Moreover, copper has excellent electrical conductivity and good elastic properties, which is convenient for processing into an elastic structure, thereby facilitating the close elastic abutment and stable electrical conduction between the second connecting part and the conductive plug-in part, and being conducive to improving the connection stability and connection reliability between the second connecting part and the conductive plug-in part. Moreover, copper has excellent mechanical strength, wear resistance and is not easy to deform, which is suitable for the plug-in working condition between the second connecting part and the conductive plug-in part, and is conducive to improving the use reliability and service life.

[0016] In some embodiments, the second connecting part is provided with at least one fish eye terminal at the end away from the first connecting part, the circuit board is provided with a plug-in hole corresponding to the fish eye terminal, the conductive plug-in part is a conductive layer provided on the hole wall of the plug-in hole, the fish eye terminal is plug-in in the plug-in hole and elastically abuts with the conductive plug-in part.

[0017] By adopting the above scheme, the second connecting part can be inserted into the insertion hole through the fisheye terminal with elastic deformation capability, and the elastic rebound characteristics after the insertion of the fisheye terminal are used to form a close and reliable elastic abutment with the conductive layer (i.e. the conductive insertion part) of the hole wall of the insertion hole. Based on this, the small deviation in the insertion assembly process can be adapted, the assembly convenience and assembly fault tolerance of the insertion fit are improved, the contact gap can be effectively eliminated, the loosening or poor contact caused by vibration, thermal expansion and cold contraction is reduced, and the reliability and stability of the electrical conduction are strengthened. Moreover, compared with other schemes such as "providing an elastic structure by the conductive insertion part" or "bolting the pads of the adapter and the circuit board", the compact structure design of the "fisheye terminal, insertion hole and conductive layer" in the embodiment can reduce the board space of the connection area between the adapter and the circuit board relative to the circuit board, i.e. without occupying too much installation space and connection space of the circuit board, so that the circuit board with limited space can be applied, the practicability and scene adaptability of the power distribution device can be improved, and the miniaturization of the power distribution device is beneficial. The assembly process can be assembled without additional locking or welding process, and the assembly process can be simplified, thereby improving the production efficiency.

[0018] In some embodiments, the second connecting part includes a connecting segment and a bent segment bently connected to one end of the connecting segment, one end of the connecting segment away from the bent segment is tightly connected with the first connecting part, the bent segment is arranged in parallel with the board surface of the circuit board, and the fisheye terminal is arranged in the bent segment.

[0019] By adopting the above scheme, by arranging the bent segment in parallel with the board surface of the circuit board and arranging the fisheye terminal in the bent segment, the axis direction of the fisheye terminal can be perpendicular to the board surface of the circuit board, and the fisheye terminal can be precisely inserted into the insertion hole in a direction perpendicular to the board surface of the circuit board. Based on this, the lateral force in the insertion assembly process or the use condition can be effectively dispersed based on the vertical insertion, the risk of permanent deformation of the fisheye terminal due to lateral force can be effectively reduced, and the stability of the elastic abutment performance of the fisheye terminal can be maintained. Moreover, based on the vertical insertion, the contact pressure between the fisheye terminal and the conductive layer (i.e. the conductive insertion part) of the hole wall of the insertion hole can be uniformly distributed, the local poor contact or stress concentration can be reduced, and the stability and reliability of the electrical connection between the fisheye terminal and the conductive insertion part can be strengthened. Moreover, based on the bending design of the bent segment and the connecting segment, the installation height of the circuit board and the space layout inside the power distribution device can be flexibly adapted, the precise alignment and insertion of the fisheye terminal and the conductive insertion part can be achieved without additional setting of a heightening structure or an extension structure, the overall structure design of the adapter can be simplified and optimized, the limited space inside the power distribution device can be optimized, the space utilization rate can be optimized, and the compact layout demand inside the power distribution device can be adapted.

[0020] In some embodiments, one fisheye terminal is arranged at one end of the second connecting part away from the first connecting part.

[0021] By adopting the above scheme, by arranging a single fisheye terminal at the end of the second connecting portion away from the first connecting portion, the structure design of the second connecting portion can be simplified, the number of components and the assembly alignment steps can be reduced, so that the structure can be simplified, the structural complexity and production cost can be reduced, and the structural simplicity, assembly convenience and assembly efficiency can be improved. Moreover, the compact layout of the single fisheye terminal can greatly reduce the board space of the connection area of the adapter and the circuit board relative to the circuit board, and can better adapt to the space-limited circuit board layout, which can facilitate the miniaturization of the power distribution device. Moreover, the single contact point connection design between the adapter and the circuit board can avoid the problems of uneven stress and alignment deviation that may occur in multi-terminal layout, and can stabilize and control the contact pressure, thereby improving the stability and reliability of the electrical connection between the adapter and the circuit board.

[0022] In some embodiments, the end of the second connecting portion away from the first connecting portion is provided with two fisheye terminals arranged in pairs with a spacing.

[0023] By adopting the above scheme, by arranging two fisheye terminals arranged in pairs with a spacing at the end of the second connecting portion away from the first connecting portion, a double-contact-point connection structure can be formed based on the layout of the double fisheye terminals, thereby greatly improving the redundancy and reliability of the electrical conduction between the adapter and the circuit board. Even if one of the fisheye terminals fails to contact due to assembly deviation, wear and other factors, the other fisheye terminal can still maintain stable electrical connection, effectively reducing the risk of circuit interruption caused by single-point failure. Moreover, the layout of the two fisheye terminals arranged in pairs with a spacing can make the contact pressure act on the circuit board more evenly, reducing the problem of local deformation of the circuit board caused by concentrated stress of a single terminal, and adapting to the needs of large-current transmission scenarios. Moreover, the compact arrangement of the double fisheye terminals does not require additional expansion of the board space of the connection area, and can balance the connection reliability and space utilization, which can meet the miniaturization design of the power distribution device.

[0024] In some embodiments, the second connecting portion is welded to the first connecting portion.

[0025] By adopting the above scheme, the second connecting part and the first connecting part of the adapter with different materials can be connected densely through welding, realizing atomic level combination, completely eliminating the interface gap, keeping the connection dry, and blocking the formation of water vapor invasion channel and conductive channel. Based on this, even if a potential difference is formed between the first connecting part and the second connecting part due to different materials, electrochemical corrosion can be effectively inhibited, thereby improving the use reliability and service life of the adapter. Moreover, the welding process is mature, reliable, convenient and efficient, and can maintain and improve the connection convenience, connection stability, connection reliability and conductive reliability between the second connecting part and the first connecting part, and can maintain and improve the batch production convenience, production consistency, structural stability, structural reliability, use reliability of the adapter, and can optimize the reliability and service life of the overall power distribution device.

[0026] In some embodiments, the second connecting part is roll-bonded with the first connecting part.

[0027] By adopting the above scheme, the second connecting part and the first connecting part of the adapter with different materials can be connected densely through welding, realizing atomic level combination, completely eliminating the interface gap, keeping the connection dry, and blocking the formation of water vapor invasion channel and conductive channel. Based on this, even if a potential difference is formed between the first connecting part and the second connecting part due to different materials, electrochemical corrosion can be effectively inhibited, thereby improving the use reliability and service life of the adapter. Moreover, the welding process is mature, reliable, convenient and efficient, and can maintain and improve the connection convenience, connection stability, connection reliability and conductive reliability between the second connecting part and the first connecting part, and can maintain and improve the batch production convenience, production consistency, structural stability, structural reliability, use reliability of the adapter, and can optimize the reliability and service life of the overall power distribution device.

[0028] In a second aspect, a battery device is provided, which includes the power distribution device provided in the embodiments of the present application.

[0029] By adopting the above scheme, the battery device can improve the use reliability and service life of the battery device by applying the power distribution device provided in the embodiments of the present application.

[0030] In a third aspect, a power consumption device is provided, which includes the power distribution device provided in the embodiments of the present application, and / or includes the battery device provided in the embodiments of the present application.

[0031] By adopting the above solutions, electrical equipment can improve its reliability and service life by using the battery device or power distribution device provided in the embodiments of this application. Attached Figure Description

[0032] 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.

[0033] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0034] Figure 2 This is an exploded view of a battery device provided in some embodiments of this application;

[0035] Figure 3 This is a schematic diagram of the structure of a power distribution device provided in some embodiments of this application, wherein the second connection part is provided with two fisheye terminals that are spaced apart and opposite to each other at one end of the first connection part;

[0036] Figure 4 for Figure 3 A partial top view of the power distribution equipment is provided.

[0037] Figure 5 for Figure 4 The provided sectional view along AA;

[0038] Figure 6 for Figure 3 A structural diagram of the provided adapter;

[0039] Figure 7 An exploded view of a power distribution device provided in some other embodiments of this application, wherein a fisheye terminal is provided at the end of the second connection portion away from the first connection portion;

[0040] Figure 8 for Figure 7 A schematic diagram of the provided adapter.

[0041] The following are the labeling elements in the figure:

[0042] 1 - battery device, 2 - controller, 3 - motor, 10 - battery cell assembly, 11 - battery cell, 20 - case, 21 - first case, 22 - second case, 30 - power distribution device, 31 - electrical component, 311 - high voltage conducting member, 32 - circuit board, 321 - conducting plug-in part, 322 - plug-in hole, 33 - adapter, 331 - first connecting part, 332 - second connecting part, 3321 - fish-eye terminal, 3322 - connecting section, 3323 - bending section. DETAILED DESCRIPTION

[0043] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clear, the present application will be described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application. If not specifically stated, all embodiments and optional embodiments of the present application can be combined to form new technical solutions. If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0044] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0046] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] The electric device can refer to a device using a battery as a power source. The power source provides electric energy to the electric device, thereby driving the electric device to work. The electric device is usually provided with a power distribution device for controlling the operation of a high-voltage circuit in the electric device; wherein the "pressure" in the high-voltage circuit refers to voltage, and the high-voltage circuit refers to a circuit with a voltage exceeding 60V. For example, the power distribution device can be a high-voltage distribution box, which can be used to manage and distribute power in the high-voltage circuit of the electric device, such as PDU (Power Distribution Unit, high-voltage distribution unit) applied in new energy vehicles. The function of the PDU is to manage and distribute power in the high-voltage circuit of the new energy vehicle, to provide the vehicle with functions such as charge and discharge control, high-voltage component power-on control, circuit overload and short circuit protection, high-voltage sampling, low-voltage control, and protection and monitoring of high-voltage system operation. The high-voltage distribution box can also be applied to the battery device and used to control the charge and discharge of the battery device, such as the battery device for charge and discharge control, and the BDU (Battery Disconnect Unit, battery pack disconnect unit) designed for the battery device.

[0048] The power distribution device usually includes an electrical device, a circuit board, and a copper adapter. One end of the copper adapter is connected to the high-voltage copper bar of the electrical device through a bolt, and the other end of the copper adapter is connected to the spring of the circuit board through a pin (i.e. PIN pin), so that the copper adapter is electrically connected between the electrical device and the circuit board. In some cases, in order to reduce cost and weight, the high-voltage copper bar is replaced by a high-voltage aluminum bar. However, in this way, the copper adapter connected by the bolt and the high-voltage aluminum bar will form a potential difference and cause electrochemical corrosion risk therebetween. If the copper adapter is also replaced by an aluminum adapter, although the aluminum adapter and the high-voltage aluminum bar will not form a potential difference, since the spring of the circuit board needs to be elastic and needs to be made of copper (aluminum has poor elastic performance, and if the pin and the spring are both made of aluminum and both do not have elasticity, the pin and the spring will be difficult to conduct electricity due to the lack of elastic abutment, thereby cannot be applied), the aluminum adapter and the spring will form a potential difference and cause electrochemical corrosion risk therebetween.

[0049] Thus, some embodiments of the application provide a power distribution device, which can be mechanically and electrically connected with the high-voltage conductive part of the electrical device through the first connecting part of the adapter in a convenient, fast and reliable manner. The material of the first connecting part is the same as that of the high-voltage conductive part, so as to eliminate the potential difference between the first connecting part and the high-voltage conductive part, and reduce the risk of electrochemical corrosion between the first connecting part and the high-voltage conductive part. The second connecting part of the adapter can be inserted and matched with the conductive plug-in part of the circuit board to achieve mechanical and electrical connection in a convenient, fast and reliable manner. The material of the second connecting part is the same as that of the conductive plug-in part, so as to eliminate the potential difference between the second connecting part and the conductive plug-in part, and reduce the risk of electrochemical corrosion between the second connecting part and the conductive plug-in part. The second connecting part and the first connecting part are densely connected with different materials, so that the connection between the second connecting part and the first connecting part is dense, dry, without water vapor invasion channel and without conductive channel. Therefore, even if a potential difference is formed between the second connecting part and the first connecting part due to different materials, electrochemical corrosion is not easy to occur between the second connecting part and the first connecting part, thereby reducing the risk of electrochemical corrosion between the second connecting part and the first connecting part. Thus, the structure and material of the adapter can be optimized from multiple dimensions to reduce the risk of electrochemical corrosion, thereby improving the connection reliability between the adapter and the electrical device, and improving the overall use reliability and service life of the power distribution device.

[0050] The power distribution device disclosed in the embodiments of the application can be used for power distribution and management of high-voltage circuits in electrical equipment, and can also be applied to battery devices and used for controlling charging and discharging of the battery devices. The battery device disclosed in the embodiments of the application can be used in electrical equipment using the battery device as a power source, or used in various energy storage systems using the battery device as an energy storage element. The electrical equipment can be, but is not limited to, vehicles, mobile phones, portable devices, notebook computers, ships, spacecraft, electric vehicles, electric toys and electric tools, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or an extended range automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc.

[0051] In order to illustrate the technical solutions provided by the application, the following will be described in detail with reference to specific drawings and embodiments, and taking "electrical equipment as a vehicle" as an example.

[0052] Please refer to Figure 1 , Figure 1 A structural schematic diagram of a vehicle is provided for some embodiments of the present application. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle is internally provided with a battery device 1, which can be arranged at the bottom, head, or tail of the vehicle. The battery device 1 is used to power the vehicle, for example, the battery device 1 can be used as the operating power source of the vehicle, for the circuit system of the vehicle, for example, for the working power demand of the vehicle during starting, navigation, and driving. The vehicle can also include a controller 2 and a motor 3, and the controller 2 is used to control the battery device 1 to power the motor 3.

[0053] In some embodiments of the present application, the battery device 1 can not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle.

[0054] Please refer to Figure 2 , Figure 2 A disassembled schematic diagram of the battery device 1 is provided for some embodiments of the present application. The battery device 1 can include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 can include a plurality of battery cells 11 connected in series, in parallel, or in a mixed connection through a busbar component. The mixed connection means that there is both series connection and parallel connection. Among them, the battery cell 11 can be a secondary battery, which means that the battery cell 11 can be activated by charging after discharging to continue to be used. The battery cell 11 can be a lithium ion battery cell, a sodium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel hydrogen battery cell, a nickel cadmium battery cell, a lead-acid battery cell, etc. The battery cell 11 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. The battery cell 11 can be packaged in different ways to form a cylindrical battery cell, a square battery cell, or a soft-pack battery cell, etc.

[0055] In some embodiments, the battery cell assembly 10 is usually formed by arranging a plurality of battery cells 11. As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing a plurality of battery cells 11 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 11 with a cable tie.

[0056] In some embodiments, the battery device 1 can be a battery pack, which includes a box 20 and one or more battery cell assemblies 10 housed in the box 20. The box 20 is used to provide a housing space for the battery cell assemblies 10 and other components, and can provide dustproof, waterproof, and protective functions for the battery cell assemblies 10 and other components housed therein, so as to reduce the influence of external liquids or other foreign matters on the performance of the battery cell assemblies 10 and other components, and effectively prolong the service life of the battery device 1. The box 20 can have various shapes, such as a cuboid or a cylinder.

[0057] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the box 20 by fixing the battery module in the box 20.

[0058] As an example, the battery cell assembly 10 can also be housed in the box 20 by directly fixing the plurality of battery cells 11 in the box 20.

[0059] As an example, the box 20 can include a first box 21 and a second box 22. The first box 21 and the second box 22 are buckled so that a closed space is formed inside the box 20 to accommodate the battery cell assembly 10. Here, the closed refers to covered or closed, which can be sealed or unsealed. As an example, the second box 22 can be a hollow structure with one end open, and the first box 21 can be a top cover or a bottom plate, which is buckled to the open side of the second box 22. As an example, the first box 21 and the second box 22 can both be hollow structures with one side open, and the open side of the first box 21 is buckled to the open side of the second box 22.

[0060] As an example, the box 20 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that a closed space is formed inside the box 20 to accommodate the battery cell assembly 10.

[0061] In some embodiments, the box 20 can be part of the chassis structure of a vehicle. For example, part of the box 20 can be at least part of the floor of the vehicle, or part of the box 20 can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0062] In some embodiments, the battery device 1 can further include other structures, for example, the battery device 1 can further include a current collecting component for connecting the plurality of battery cells 11 to achieve electrical connection between the plurality of battery cells 11.

[0063] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6Some embodiments of the present application provide a power distribution device 30, comprising an electrical component 31, a circuit board 32 and an adapter 33. The electrical component 31 comprises a high-voltage conductive component 311. The circuit board 32 is provided with a conductive plug-in part 321. The adapter 33 comprises a first connecting part 331 and a second connecting part 332, the material of the first connecting part 331 is the same as that of the high-voltage conductive component 311 and is electrically connected with the high-voltage conductive component 311, the material of the second connecting part 332 is the same as that of the conductive plug-in part 321 and is different from that of the first connecting part 331, one end of the second connecting part 332 is tightly connected with one end of the first connecting part 331, and the other end of the second connecting part 332 is plugged into and electrically connected with the conductive plug-in part 321.

[0064] It should be noted that, please refer to Figure 1 、 Figure 2 , the power distribution device 30 can be used for power distribution and management of high-voltage circuits in electrical equipment, and can also be applied to the battery device 1 and used for controlling the charging and discharging of the battery device 1. Among them, "pressure" in high-voltage refers to voltage, and high-voltage refers to voltage exceeding 60V. For example, the power distribution device 30 can be a high-voltage power distribution box, which can be used for power distribution and management of high-voltage circuits in electrical equipment, for example: PDU (Power Distribution Unit, high-voltage power distribution unit) applied in new energy vehicles, wherein the function of PDU is to be responsible for power distribution and management in the high-voltage circuit of new energy vehicles, to provide the whole vehicle with functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short circuit protection, high-voltage sampling, low-voltage control, etc., to protect and monitor the operation of the high-voltage system; the high-voltage power distribution box can also be applied to the battery device 1 and used for controlling the charging and discharging of the battery device 1, for example: BDU (Battery Disconnect Unit, battery pack disconnect unit) designed for the battery device 1, which can be arranged in the box 20 of the battery device 1.

[0065] It should also be noted that the electrical component 31 refers to a functional component in the power distribution device 30 that has high-voltage conductive function and whose high-voltage conductive component 311 needs to be electrically connected with the circuit of the circuit board 32 through the adapter 33, and its core function is to participate in the on-off, protection, detection or energy distribution of the high-voltage circuit, for example, the electrical component 31 can be a main positive relay, a main negative relay, a pre-charging relay, a pre-charging resistor, a main fuse, a current sensor, a shunt, etc. The high-voltage conductive component 311 has certain conductive performance, voltage resistance performance and mechanical strength in a high-voltage scene, and is used as a core conductive component to carry current transmission in a high-voltage circuit. For example, the material of the high-voltage conductive component 311 can be but is not limited to aluminum material, copper material, etc. Among them, "pressure" in high-voltage refers to voltage, and high-voltage refers to voltage exceeding 60V.

[0066] The circuit board 32 is a functional component integrated with a circuit. As shown in Figure 3 In some embodiments, the circuit board 32 can be a rigid circuit board made of a hard substrate, for example, can be a Printed Circuit Board (PCB) or a Printed Circuit Board Assembly (PCBA), etc. In other embodiments, the circuit board 32 can be a flexible circuit board. In some cases, the circuit board 32 can serve as a core functional carrier of a BMU (Battery Management Unit), a CMC (Cell Monitoring Circuit), a BMS (Battery Management System), by integrating control chips, sampling circuits, communication interfaces, and other elements, to realize key functions such as voltage sampling, temperature monitoring, equalization control, and safety protection of the battery device 1.

[0067] The conductive plug-in part 321 provided on the circuit board 32 is a structure provided on the corresponding circuit and used for plug-in electrical connection with the adapter 33. As shown in Figure 5 In some embodiments, the adapter 33 can be a male end, the conductive plug-in part 321 can be a female end, and the adapter 33 can be plugged into the conductive plug-in part 321. As an example, the conductive plug-in part 321 can be a cylindrical conductive layer, a plug spring, a socket, etc. In other embodiments, the adapter 33 can be a female end, the conductive plug-in part 321 can be a male end, and the conductive plug-in part 321 can be plugged into the adapter 33. As an example, the conductive plug-in part 321 can be a needle-shaped conductive column, a pin, a boss-shaped conductive terminal, etc.

[0068] The adapter 33 is an intermediate component for realizing the electrical connection between the electrical device 31 and the circuit board 32. The adapter 33 comprises a first connecting portion 331 and a second connecting portion 332 connected in sequence. The first connecting portion 331 is a functional part of the adapter 33 that is electrically connected to the high-voltage conductive part 311 of the electrical device 31. The material of the first connecting portion 331 is the same as that of the high-voltage conductive part 311, for example, both the first connecting portion 331 and the high-voltage conductive part 311 are made of aluminum or both are made of copper, etc. The first connecting portion 331 and the high-voltage conductive part 311 can be mechanically fixed and electrically connected through, but not limited to, fasteners (such as bolts, etc.), welding, crimping, riveting, etc., without affecting the overcurrent, and basically without considering the space occupied; the first connecting portion 331 can be connected to the high-voltage conductive part 311 through the middle part or the end part away from the second connecting portion 332 or other parts. Based on this, it is convenient to realize the mechanical connection and electrical connection between the first connecting portion 331 and the high-voltage conductive part 311, and the potential difference between the first connecting portion 331 and the high-voltage conductive part 311 is eliminated due to the same material, thereby reducing the risk of electrochemical corrosion.

[0069] The second connecting portion 332 is a functional part of the adapter 33 that is plugged into the conductive plug-in portion 321 of the circuit board 32. The material of the second connecting portion 332 is the same as that of the conductive plug-in portion 321, for example, both the second connecting portion 332 and the conductive plug-in portion 321 are made of copper or both are made of aluminum, etc. The end of the second connecting portion 332 away from the first connecting portion 331 is plugged into the conductive plug-in portion 321 to realize electrical connection, wherein the second connecting portion 332 can be a male end, the conductive plug-in portion 321 can be a female end, and the second connecting portion 332 is plugged into the conductive plug-in portion 321, or the second connecting portion 332 can be a female end, the conductive plug-in portion 321 can be a male end, and the conductive plug-in portion 321 is plugged into the second connecting portion 332. Based on this, it is convenient to realize the mechanical connection and electrical connection between the second connecting portion 332 and the conductive plug-in portion 321, and the potential difference between the second connecting portion 332 and the conductive plug-in portion 321 is eliminated due to the same material, thereby reducing the risk of electrochemical corrosion.

[0070] The material of the second connecting part 332 is different from that of the first connecting part 331, for example, the material of the first connecting part 331 is aluminum, and the material of the second connecting part 332 is copper, and the like. The end of the second connecting part 332 close to the first connecting part 331 is densely connected with the end of the first connecting part 331 close to the second connecting part 332. The dense connection refers to a precise connection mode that can eliminate the interface gap between components and realize atomic or molecular level bonding, for example, welding, rolling and the like can be used but not limited to. Based on the dense connection, the connection between the second connecting part 332 and the first connecting part 331 is dense, dry, without water vapor intrusion channel, and without conductive channel. Therefore, even if a potential difference is formed between the second connecting part 332 and the first connecting part 331 due to different materials, electrochemical corrosion phenomenon is not easy to occur between the second connecting part 332 and the first connecting part 331, that is, the risk of electrochemical corrosion can be reduced.

[0071] In summary, the power distribution device 30 provided by the embodiment of the present application can be conveniently, quickly and reliably mechanically connected and electrically connected through the first connecting part 331 of the adapter 33 and the high-voltage conductive part 311 of the electrical device 31, and the material of the first connecting part 331 is the same as that of the high-voltage conductive part 311 to eliminate the potential difference between the first connecting part 331 and the high-voltage conductive part 311, thereby reducing the risk of electrochemical corrosion between the first connecting part 331 and the high-voltage conductive part 311. The second connecting part 332 of the adapter 33 can be conveniently, quickly and reliably mechanically connected and electrically connected with the conductive plug-in part 321 of the circuit board 32 through plug-in cooperation, and the material of the second connecting part 332 is the same as that of the conductive plug-in part 321 to eliminate the potential difference between the second connecting part 332 and the conductive plug-in part 321, thereby reducing the risk of electrochemical corrosion between the second connecting part 332 and the conductive plug-in part 321. The second connecting part 332 with different materials can be densely connected with the first connecting part 331, so that the connection between the second connecting part 332 and the first connecting part 331 is dense, dry, without water vapor intrusion channel, and without conductive channel. Based on this, even if a potential difference is formed between the second connecting part 332 and the first connecting part 331 due to different materials, electrochemical corrosion phenomenon is not easy to occur between the second connecting part 332 and the first connecting part 331, thereby reducing the risk of electrochemical corrosion between the second connecting part 332 and the first connecting part 331. Therefore, through the structure optimization and material adaptation optimization of the adapter 33, the electrochemical corrosion risk can be reduced from multiple dimensions, thereby improving the connection reliability between the adapter 33 and the electrical device 31, and between the adapter 33 and the circuit board 32, and improving the overall use reliability and service life of the power distribution device 30.

[0072] And, compared with other solutions such as “the adapter 33 and the pad of the circuit board 32 are connected through bolt locking”, the compact connection design of “the second connecting part 332 and the conductive plug-in part 321 are plug-in matched” is adopted in the embodiment, so that the circuit board 32 does not need to occupy too much installation space and connection space, and can be applied to the circuit board 32 with limited space, thereby being beneficial to the miniaturization of the power distribution device 30 and being beneficial to improving the practicality and scene adaptability of the power distribution device 30. In addition, the assembly process does not need additional locking or welding process, and the assembly process can be simplified, thereby being beneficial to improving the production efficiency.

[0073] Please refer to Figure 3 , Figure 5 , Figure 6 In some embodiments of the present application, the first connecting part 331 is an aluminum material part. Correspondingly, the high-voltage conductive part 311 is an aluminum material part.

[0074] By adopting the above solution, the aluminum material high-voltage conductive part 311 can be adapted, and on the basis of eliminating the potential difference between the first connecting part 331 and the high-voltage conductive part 311 due to the same material to reduce the risk of electrochemical corrosion, based on the good processing formability and conductivity of the aluminum material, the mechanical fixation and stable electrical conduction between the first connecting part 331 and the high-voltage conductive part 311 can be facilitated, thereby improving the connection reliability between the first connecting part 331 and the high-voltage conductive part 311. And, compared with precious metals such as copper, the first connecting part 331 and the high-voltage conductive part 311 adopt aluminum material, which can significantly reduce the material cost and the overall weight on the premise of meeting the requirements of the conductivity and the mechanical strength under high-voltage working conditions, thereby being beneficial to the lightweight of the power distribution device 30. In addition, one of the core characteristics of aluminum material is that a dense aluminum oxide protective film can be naturally formed on the surface, which can effectively isolate the contact between the corrosion medium such as air and water vapor and the internal matrix, thereby inhibiting the chemical corrosion of the aluminum material itself. Therefore, compared with easily corroded materials such as iron, the first connecting part 331 and the high-voltage conductive part 311 adopt aluminum material, which can significantly improve the overall corrosion resistance and reliability.

[0075] Of course, in other embodiments, the first connecting part 331 can adopt other conductive materials with the high-voltage conductive part 311.

[0076] Please refer to Figure 3 , Figure 5 , Figure 6 In some embodiments of the present application, the second connecting part 332 and the conductive plug-in part 321 are elastically abutted.

[0077] It should be noted that at least one of the second connecting portion 332 and the conductive plug-in portion 321 has elastic properties, so that the second connecting portion 332 and the conductive plug-in portion 321 in plug-in cooperation can be elastically abutted, and the contact surface between the second connecting portion 332 and the conductive plug-in portion 321 is tightly fitted, so that reliable electrical conduction between the second connecting portion 332 and the conductive plug-in portion 321 is achieved. Wherein, the elastic properties can be realized by structural design (such as fisheye terminal 3321, elastic clamping piece, corrugated contact structure, elastic clamping jaw, elastic contact piece, etc.) or material properties (such as using copper alloy, spring steel, etc. Conductive materials with good elastic properties).

[0078] By adopting the above scheme, on the basis of the plug-in cooperation of the second connecting portion 332 and the conductive plug-in portion 321, the second connecting portion 332 and the conductive plug-in portion 321 are elastically abutted, on the one hand, a certain buffer margin can be provided by using elasticity to adapt to the slight deviation in the plug-in assembly process, and the assembly fault tolerance and operation convenience of plug-in cooperation are improved. On the other hand, based on the elastic abutment, the contact surface between the second connecting portion 332 and the conductive plug-in portion 321 is tightly fitted, the risk of loosening or poor contact between the second connecting portion 332 and the conductive plug-in portion 321 is reduced, and the reliability and durability of the electrical conduction and electrical connection between the second connecting portion 332 and the conductive plug-in portion 321 are strengthened. The connection stability and connection reliability of the adapter 33 and the circuit board 32 can be improved, and the structural reliability and operation reliability of the power distribution device 30 can be improved.

[0079] Of course, in other embodiments, on the basis of the plug-in cooperation of the second connecting portion 332 and the conductive plug-in portion 321, the contact surface between the second connecting portion 332 and the conductive plug-in portion 321 can be tightly fitted by interference fit or external pressure connection structure, or the gap between the second connecting portion 332 and the conductive plug-in portion 321 can be filled by conductive medium, etc. Mode, realize the reliability of the electrical conduction and electrical connection between the second connecting portion 332 and the conductive plug-in portion 321.

[0080] Please refer to Figure 3 , Figure 5 , Figure 6 In some embodiments of the present application, the second connecting portion 332 is a copper material portion. Correspondingly, the conductive plug-in portion 321 is a copper material portion.

[0081] By adopting the above scheme, the conductive plug-in part 321 of copper material can be adapted, and the potential difference between the second connecting part 332 and the conductive plug-in part 321 can be eliminated by the material consistency to reduce the risk of electrochemical corrosion. Moreover, copper has excellent electrical conductivity and good elastic performance, which is convenient for processing into an elastic structure, so as to facilitate the close and stable electrical conduction between the second connecting part 332 and the conductive plug-in part 321, and improve the connection stability and reliability between the second connecting part 332 and the conductive plug-in part 321.

[0082] Of course, in other embodiments, the second connecting part 332 can adopt other conductive materials with the conductive plug-in part 321.

[0083] Please refer to Figure 3 、 Figure 5 、 Figure 6 In some embodiments of the present application, the second connecting part 332 is provided with at least one fisheye terminal 3321 at the end away from the first connecting part 331, the circuit board 32 is provided with a plug-in hole 322 corresponding to the fisheye terminal 3321, the conductive plug-in part 321 is a conductive layer provided on the hole wall of the plug-in hole 322, the fisheye terminal 3321 is plugged into the plug-in hole 322 and elastically abuts against the conductive plug-in part 321.

[0084] It should be noted that the second connecting part 332 is provided with at least one fisheye terminal 3321 at the end away from the first connecting part 331, the fisheye terminal 3321 is a conductive connecting element with a fish-eye-like shape and elastic deformation capability, which can produce radial elastic deformation when subjected to external pressure and can restore the original shape after the external force is removed.

[0085] Correspondingly, the circuit board 32 is provided with at least one plug-in hole 322, and the plug-in hole 322 is provided one by one corresponding to the fisheye terminal 3321; as an example, the plug-in hole 322 can be a through hole or a blind hole; as an example, the plug-in hole 322 can be a rectangular hole, a waist-shaped hole, a circular hole or other shaped holes.

[0086] The hole wall of each plug-in hole 322 is provided with a conductive layer as a conductive plug-in part 321, and the conductive layer is a functional layer with conductive performance. The material of the conductive layer can be consistent with the material of the second connecting part 332 (for example, both are copper, copper alloy or other suitable conductive materials) to eliminate the potential difference between them and reduce the risk of electrochemical corrosion. The conductive layer can be formed by electroplating, chemical plating, sputtering or conductive paste coating process, and the thickness of the conductive layer can be flexibly set as needed.

[0087] In the case that the fish-eye terminal 3321 is plugged into the corresponding plugging hole 322, the fish-eye terminal 3321 can be elastically deformed radially by being extruded by the conductive layer to achieve elastic abutment with the conductive plugging part 321.

[0088] By adopting the above scheme, the second connecting part 332 can be plugged into the plugging hole 322 by the fish-eye terminal 3321 with elastic deformation capability, and the elastic rebound characteristics after the fish-eye terminal 3321 is inserted can be used to form close and reliable elastic abutment with the conductive layer (i.e., the conductive plugging part 321) of the hole wall of the plugging hole 322. Based on this, not only can small deviations in the plugging assembly process be adapted, the assembly convenience and assembly fault tolerance of the plugging cooperation be improved, but also the contact gap can be effectively eliminated, the loosening or poor contact caused by vibration, thermal expansion and contraction, etc. can be reduced, and the reliability and stability of the electrical conduction can be strengthened. Moreover, compared with other schemes such as "providing an elastic structure by the conductive plugging part 321" or "bolting connection between the adapter 33 and the pads of the circuit board 32", the compact structure design of "the fish-eye terminal 3321, the plugging hole 322, and the conductive layer" adopted in the embodiment can reduce the panel space of the connection area between the adapter 33 and the circuit board 32 relative to the circuit board 32, i.e., without occupying too much installation space and connection space of the circuit board 32, so that it can be applied to the circuit board 32 with limited space, and the practicability and scene adaptability of the power distribution device 30 can be improved, which is beneficial to the miniaturization of the power distribution device 30; and the assembly process can not need additional bolting or welding procedures, and the assembly process can be simplified, so as to improve the production efficiency.

[0089] Of course, in other embodiments, an elastic structure can be provided by the conductive plugging part 321 to elastically abut the second connecting part 332 via the elastic structure of the conductive plugging part 321 in the case of plugging cooperation between the second connecting part 332 and the conductive plugging part 321.

[0090] Please refer to Figure 3 , Figure 5 , Figure 6 In some embodiments of the present application, the second connecting part 332 includes a connecting segment 3322 and a bent segment 3323 bently connected to one end of the connecting segment 3322, one end of the connecting segment 3322 away from the bent segment 3323 is tightly connected with the first connecting part 331, the bent segment 3323 is arranged parallel to the panel surface of the circuit board 32, and the fish-eye terminal 3321 is arranged in the bent segment 3323.

[0091] It should be noted that the connecting section 3322 is the part where the second connecting part 332 is densely connected with the first connecting part 331, and the connecting section 3322 is arranged extending from the first connecting part 331 to the circuit board 32. The bending section 3323 is bently connected to one end of the connecting section 3322 away from the first connecting part 331, that is, the bending section 3323 is bently connected to one end of the connecting section 3322 close to the circuit board 32, and the bending section 3323 is arranged parallel to the board surface of the circuit board 32. The included angle between the bending section 3323 and the connecting section 3322 can be flexibly set as needed. As an example, the included angle between the bending section 3323 and the connecting section 3322 can be 90°, that is, the bending section 3323 is perpendicular to the connecting section 3322. The fish-eye terminal 3321 is arranged on the side surface of the bending section 3323 facing the board surface of the circuit board 32.

[0092] By adopting the above scheme, by arranging the bending section 3323 parallel to the board surface of the circuit board 32 and arranging the fish-eye terminal 3321 on the bending section 3323, the axial direction of the fish-eye terminal 3321 can be perpendicular to the board surface of the circuit board 32, and the fish-eye terminal 3321 can be accurately inserted into the insertion hole 322 in a direction perpendicular to the board surface of the circuit board 32. Based on this, the lateral force during the insertion assembly process or under the working condition can be effectively dispersed based on the vertical insertion, and the risk of permanent deformation of the fish-eye terminal 3321 due to lateral force can be effectively reduced, thereby maintaining the stability of the elastic abutting performance of the fish-eye terminal 3321. Moreover, based on the vertical insertion, the contact pressure between the fish-eye terminal 3321 and the conductive layer (i.e., the conductive insertion part 321) of the hole wall of the insertion hole 322 can be uniformly distributed, and local poor contact or stress concentration can be reduced, thereby strengthening the stability and reliability of the electrical connection between the fish-eye terminal 3321 and the conductive insertion part 321. Moreover, based on the bending design of the bending section 3323 and the connecting section 3322, the installation height of the circuit board 32 and the space layout inside the power distribution device 30 can be flexibly adapted, and the accurate alignment and insertion of the fish-eye terminal 3321 and the conductive insertion part 321 can be achieved without the need for additional cushioning structures or extension structures, thereby simplifying and optimizing the overall structural design of the adapter 33, optimizing the use of the limited space inside the power distribution device 30, optimizing the space utilization, and adapting to the compact layout requirements inside the power distribution device 30.

[0093] Of course, in other embodiments, the second connecting part 332 can only have the connecting section 3322, and the fish-eye terminal 3321 is arranged on the end surface of the connecting section 3322 away from the first connecting part 331.

[0094] Please refer to Figure 7 , Figure 8 In some embodiments of the present application, one fish-eye terminal 3321 is arranged on one end of the second connecting part 332 away from the first connecting part 331.

[0095] By adopting the above scheme, by arranging a single fisheye terminal 3321 at the end of the second connecting portion 332 away from the first connecting portion 331, reliable elastic abutment of the fisheye terminal 3321 and the conductive plug-in portion 321 (see Figure 5 ) can be facilitated, and the structural design of the second connecting portion 332 is simplified, the number of components and the assembly alignment steps are reduced, so that the structure can be simplified, the structural complexity and production cost can be reduced, and the structural simplicity, assembly convenience and assembly efficiency can be improved. Moreover, the compact layout of the single fisheye terminal 3321 can greatly reduce the board space of the connection area of the adapter 33 relative to the circuit board 32, and can better adapt to the space-limited circuit board 32 layout, which can facilitate the miniaturization of the power distribution device 30. Moreover, the single contact point connection design between the adapter 33 and the circuit board 32 can avoid uneven stress, alignment deviation and other problems that may occur in multi-terminal layout, and can stabilize the contact pressure, thereby improving the stability and reliability of the electrical connection between the adapter 33 and the circuit board 32.

[0096] Please refer to Figure 3 , Figure 5 , Figure 6 In some embodiments of the present application, the end of the second connecting portion 332 away from the first connecting portion 331 is provided with two fisheye terminals 3321 arranged in pairs.

[0097] By adopting the above scheme, by arranging two fisheye terminals 3321 arranged in pairs at the end of the second connecting portion 332 away from the first connecting portion 331, a double-contact-point connection structure can be formed based on the layout of the double fisheye terminals 3321, thereby greatly improving the redundancy and reliability of the electrical conduction between the adapter 33 and the circuit board 32. Even if one of the fisheye terminals 3321 fails to contact due to assembly deviation, wear and other factors, the other fisheye terminal 3321 can still maintain stable electrical connection, effectively reducing the risk of circuit interruption caused by single-point failure. Moreover, the layout of the two fisheye terminals 3321 arranged in pairs can make the contact pressure act on the circuit board 32 more evenly, and can reduce the problem of local deformation of the circuit board 32 caused by stress concentration of a single terminal, and can meet the demand of large-current transmission scenario. Moreover, the compact arrangement of the double fisheye terminals 3321 does not require additional expansion of the board space of the connection area, and can balance the connection reliability and space utilization, and can meet the miniaturization design of the power distribution device 30.

[0098] Please refer to Figure 3 , Figure 5 , Figure 6In some embodiments of the present application, the second connecting portion 332 is welded with the first connecting portion 331. That is, the second connecting portion 332 is densely connected with the first connecting portion 331 by welding. In this case, the welding can be at least one of ultrasonic welding, friction stir welding, molecular diffusion welding, and laser welding.

[0099] By using the above scheme, the second connecting portion 332 and the first connecting portion 331 of the adapter 33 with different materials can be densely connected by welding, realizing atomic-level combination of the two, completely eliminating the interface gap, keeping the connection dry and dense, and blocking the formation of water vapor invasion channels and conductive channels. Based on this, even if a potential difference is formed between the first connecting portion 331 and the second connecting portion 332 due to different materials, electrochemical corrosion can be effectively inhibited, thereby improving the use reliability and service life of the adapter 33. Moreover, the welding process is mature, reliable, convenient and efficient, and can maintain and improve the connection convenience, connection stability, connection reliability and conductive reliability between the second connecting portion 332 and the first connecting portion 331, and can maintain and improve the batch production convenience, production consistency, structural stability, structural reliability, use reliability of the adapter 33, and can optimize the reliability and service life of the overall power distribution device 30.

[0100] Please refer to Figure 3 , Figure 5 , Figure 6 In some embodiments of the present application, the second connecting portion 332 is roll-bonded with the first connecting portion 331. That is, the second connecting portion 332 is densely connected with the first connecting portion 331 by roll-bonding.

[0101] By using the above scheme, the second connecting portion 332 and the first connecting portion 331 of the adapter 33 with different materials can be densely connected by roll-bonding, realizing atomic-level combination of the two, completely eliminating the interface gap, keeping the connection dry and dense, and blocking the formation of water vapor invasion channels and conductive channels. Based on this, even if a potential difference is formed between the first connecting portion 331 and the second connecting portion 332 due to different materials, electrochemical corrosion can be effectively inhibited, thereby improving the use reliability and service life of the adapter 33. Moreover, compared with welding and other methods, the roll-bonding process does not require additional solder or adhesive, which can reduce the connection cost and process complexity and can adapt to batch production requirements; and the connection structure formed by plastic deformation has high strength and stable conductivity, which can reduce the risk of interface defects, thermal stress cracking and other problems, and can improve the connection stability and connection reliability; and the roll-bonding process is suitable for various heterogeneous material combinations, without considering the compatibility of the solder and the base material, which can improve the flexibility of material selection for the adapter 33.

[0102] Please refer toFigure 3 、 Figure 4 、 Figure 5 、 Figure 6In some embodiments, the power distribution device 30 includes an electrical component 31, a circuit board 32, and an adapter 33. The electrical component 31 includes a high-voltage conductive part 311, and the circuit board 32 includes a conductive plug-in part 321. The adapter 33 includes a first connecting part 331 and a second connecting part 332. The first connecting part 331 is made of the same material as the high-voltage conductive part 311, both of which are made of aluminum. The first connecting part 331 is electrically connected to the high-voltage conductive part 311. The second connecting part 332 is made of the same material as the conductive plug-in part 321, both of which are made of copper. The material of the second connecting part 332 is different from that of the first connecting part 331. The second connecting part 332 includes a connecting segment 3322 and a bent segment 3323 bently connected to one end of the connecting segment 3322. The other end of the connecting segment 3322 away from the bent segment 3323 is tightly connected to the first connecting part 331 by welding or rolling. The bent segment 3323 is parallel to the surface of the circuit board 32 and has two fisheye terminals 3321 arranged on one side of the bent segment 3323 facing the surface of the circuit board 32. The circuit board 32 has plug-in holes 322 corresponding to the fisheye terminals 3321. The conductive plug-in part 321 is a conductive layer arranged on the hole wall of the plug-in holes 322. The fisheye terminals 3321 are inserted into the plug-in holes 322 and elastically abut against the conductive plug-in part 321 to achieve reliable electrical connection. Thus, the power distribution device 30 can be conveniently, quickly, and reliably mechanically and electrically connected by the first connecting part 331 of the adapter 33 and the high-voltage conductive part 311 of the electrical component 31. The material of the first connecting part 331 is the same as that of the high-voltage conductive part 311 to eliminate the potential difference between the first connecting part 331 and the high-voltage conductive part 311, thereby reducing the risk of electrochemical corrosion between the first connecting part 331 and the high-voltage conductive part 311. The fisheye terminals 3321 of the second connecting part 332 of the adapter 33 are inserted into the plug-in holes 322 of the circuit board 32 to achieve convenient, quick, and reliable mechanical and electrical connection. The second connecting part 332 is made of the same material as the conductive plug-in part 321 to eliminate the potential difference between the second connecting part 332 and the conductive plug-in part 321, thereby reducing the risk of electrochemical corrosion between the second connecting part 332 and the conductive plug-in part 321.The second connecting part 332 and the first connecting part 331 can be densely connected by different materials, so that the connection between the second connecting part 332 and the first connecting part 331 is dense, dry, without water vapor invasion channel, and without conductive channel. Based on this, even if a potential difference is formed between the second connecting part 332 and the first connecting part 331 due to different materials, electrochemical corrosion phenomenon is not easy to occur between the second connecting part 332 and the first connecting part 331, thereby reducing the risk of electrochemical corrosion between the second connecting part 332 and the first connecting part 331. Therefore, through the structure optimization and material adaptation optimization of the adapter 33, the electrochemical corrosion risk can be reduced from multiple dimensions, thereby improving the connection reliability between the adapter 33 and the electrical device 31, the connection reliability between the adapter 33 and the circuit board 32, and the overall use reliability and service life of the power distribution device 30.

[0103] Please refer to Figure 2 、 Figure 3 Some embodiments of the present application provide a battery device 1 comprising the power distribution device 30 provided by the embodiments of the present application.

[0104] By adopting the above scheme, the battery device 1 can improve the use reliability and service life of the battery device 1 by applying the power distribution device 30 provided by the embodiments of the present application.

[0105] Please refer to Figure 2 、 Figure 3 Some embodiments of the present application provide a battery device 1 comprising the power distribution device 30 provided by the embodiments of the present application.

[0106] By adopting the above scheme, the battery device 1 can improve the use reliability and service life of the battery device 1 by applying the power distribution device 30 provided by the embodiments of the present application.

[0107] The above is only an optional embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of claims of the present application.

Claims

1. A power distribution device, characterized in that, include: Electrical components, including high-voltage conductive components; The circuit board is equipped with conductive connectors; The adapter includes a first connecting part and a second connecting part. The first connecting part is made of the same material as the high-voltage conductive component and is electrically connected to the high-voltage conductive component. The second connecting part is made of the same material as the conductive plug-in part and is made of a different material than the first connecting part. One end of the second connecting part is tightly connected to one end of the first connecting part, and the other end of the second connecting part is plugged into and electrically connected to the conductive plug-in part.

2. The power distribution device as described in claim 1, characterized in that, The first connecting part is made of aluminum.

3. The power distribution device as described in claim 1, characterized in that, The second connecting part elastically abuts against the conductive plug part.

4. The power distribution device as described in claim 3, characterized in that, The second connecting part is made of copper.

5. The power distribution device as described in claim 3, characterized in that, The second connecting part has at least one fisheye terminal at one end away from the first connecting part. The circuit board has a plug hole corresponding to the fisheye terminal. The conductive plug part is a conductive layer disposed on the hole wall of the plug hole. The fisheye terminal is inserted into the plug hole and elastically abuts against the conductive plug part.

6. The power distribution device as described in claim 5, characterized in that, The second connecting part includes a connecting section and a bent section connected to one end of the connecting section. The end of the connecting section away from the bent section is tightly connected to the first connecting part. The bent section is arranged parallel to the surface of the circuit board. The fisheye terminal is disposed on the bent section.

7. The power distribution device as described in claim 5, characterized in that, The second connecting portion has a fisheye terminal at the end away from the first connecting portion.

8. The power distribution device as described in claim 5, characterized in that, The second connecting part has two fisheye terminals that are spaced apart and opposite to each other at one end away from the first connecting part.

9. The power distribution device as described in any one of claims 1-8, characterized in that, The second connecting part is welded to the first connecting part.

10. The power distribution device as described in any one of claims 1-8, characterized in that, The second connecting part is rolled together with the first connecting part.

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.

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