Power distribution unit

Abstract

The utility model discloses a power distribution unit, and relates to the technical field of battery control. The battery management system comprises a first shell, a battery management system main board, a plurality of electronic auxiliary devices and an electric connecting piece, the battery management system main board is installed on the first shell, an installation space is formed between the battery management system main board and the first shell, and the electronic auxiliary devices and the electric connecting piece are installed in the installation space. At least part of the electronic auxiliary devices are electrically connected with the battery management system mainboard, the surface of the side, facing the battery management system mainboard, of the first shell is provided with an installation area and a connection area which are adjacently arranged, the electronic auxiliary devices are arranged in the installation area, and the electric connecting pieces are arranged in the connection area. The power distribution unit is electrically connected with at least part of the plurality of electronic auxiliary devices, and is electrically connected with a power supply and a load through the electric connecting piece. According to the power distribution unit, the first shell is subjected to region division, so that the spatial layout in the power distribution unit is reasonably regulated, and the power distribution unit tends to be miniaturized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery control, and in particular to a power distribution unit. BACKGROUND

[0002] In a new energy vehicle, a power battery is a main core component. In the power battery, a power distribution unit is usually a control center of a battery pack. With the rise of domestic new energy vehicles, users have increasingly strong demand for a longer cruising range. However, to improve the cruising range of a vehicle, more battery cells need to be placed in a battery pack of the same size. Therefore, miniaturization of the power distribution unit has become an urgent demand of more and more battery manufacturers. CONTENT OF THE UTILITY MODEL

[0003] One of the embodiments of the present application provides a power distribution unit, which comprises a first shell, a battery management system mainboard, a plurality of electronic auxiliary devices and an electrical connector. The battery management system mainboard is installed on the first shell, and an installation space is formed between the battery management system mainboard and the first shell. The plurality of electronic auxiliary devices and the electrical connector are installed in the installation space. At least part of the plurality of electronic auxiliary devices is electrically connected to the battery management system mainboard. A surface of a side of the first shell facing the battery management system mainboard is provided with an adjacent installation area and a connection area. The plurality of electronic auxiliary devices are arranged in the installation area. The electrical connector is arranged in the connection area and is electrically connected to at least part of the plurality of electronic auxiliary devices. The power distribution unit is arranged to be electrically connected to a power supply and a load through the electrical connector.

[0004] Further embodiments are that the connection area is arranged adjacent to an edge of the first shell.

[0005] Further embodiments are that the plurality of electronic auxiliary devices comprise relays. The relays are clamped on the first shell and are electrically connected to the battery management system mainboard.

[0006] Further embodiments are that the relays comprise a main positive relay, a main negative relay and a fast charging relay. The installation area comprises a main positive relay installation area for installing the main positive relay, a main negative relay installation area for installing the main negative relay and a fast charging relay installation area for installing the fast charging relay. The main positive relay installation area is provided with a heat dissipation hole corresponding to a region of a bottom of the main positive relay. The main negative relay installation area is provided with a heat dissipation hole corresponding to a region of a bottom of the main negative relay. The fast charging relay installation area is provided with a heat dissipation hole corresponding to a region of a bottom of the fast charging relay. The main positive relay, the main negative relay and the fast charging relay are electrically connected to the electrical connector.

[0007] Further embodiments are that the relay includes a heating relay, the mounting area includes a heating relay mounting area, two buckle members are arranged opposite on the heating relay mounting area, the heating relay is located between the two buckle members, and the heating relay mounting area is provided with an elastic member corresponding to the bottom of the heating relay, and the elastic member is matched with the two buckle members to clamp the heating relay.

[0008] Further embodiments are that the plurality of electronic auxiliary devices includes a main fuse device, the mounting area includes a main fuse device mounting area, the main fuse device mounting area is provided with a mounting table, the main fuse device is arranged on one side of the mounting table close to the connection area, and is electrically connected with the electrical connection member.

[0009] Further embodiments are that the plurality of electronic auxiliary devices includes a shunt, the mounting area includes a shunt mounting area, the shunt mounting area is provided with an assembly table, the shunt is arranged on one side of the assembly table close to the connection area, and is electrically connected with the electrical connection member.

[0010] Further embodiments are that the plurality of electronic auxiliary devices includes a branch fuse device, the mounting area includes a branch fuse device mounting area, the branch fuse device mounting area is provided with a support table, one end of the branch fuse device is mounted on the support table, and the other end is mounted on the first shell.

[0011] Further embodiments are that the branch fuse device is a plurality of, and the support table is provided with an insulating isolation member between adjacent two branch fuse devices.

[0012] Further embodiments are that the battery management system mainboard includes a second shell and a mainboard body, the second shell is connected with the first shell to form the mounting space between the first shell and the second shell, the mainboard body is arranged on one side of the second shell away from the first shell, and is electrically connected with at least part of the plurality of electronic auxiliary devices.

[0013] Further embodiments are that the mounting area includes a main positive relay mounting area, a main negative relay mounting area, a fast charging relay mounting area, a heating relay mounting area, a main fuse device mounting area, a branch fuse device mounting area and a shunt mounting area, the main positive relay mounting area, the main negative relay mounting area, the fast charging relay mounting area, the main fuse device mounting area and the shunt mounting area are arranged in the extension direction of the connection area and connected with the connection area, the heating relay mounting area is located on one side of the main fuse device mounting area away from the connection area, and the branch fuse device mounting area is located on one side of the shunt mounting area away from the connection area.

[0014] Further embodiments are that the plurality of electronic auxiliary devices include a main positive relay, a main negative relay, a fast charging relay, a heating relay, a main fuse device, a branch fuse device and a shunt, one end of the main fuse device and one end of the shunt are matched to be electrically connected with the battery, the other end of the main fuse device is respectively electrically connected with the main positive relay and the fast charging relay, the other end of the shunt is electrically connected with the main negative relay, the main negative relay is matched with the main positive relay to be connected with the load, the main negative relay is matched with the fast charging relay to be connected with an external power supply, the main positive relay, the main negative relay, the fast charging relay and the heating relay are all electrically connected with the battery management system mainboard.

[0015] The application adopts the technical scheme, and the first shell is divided into regions to reasonably regulate the spatial layout in the power distribution unit, so that the power distribution unit is miniaturized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the power distribution unit in some embodiments of the application is shown in the figure.

[0017] Figure 2 The structure of the power distribution unit in some embodiments of the application is shown in the figure. Figure 1 The structure of the power distribution unit in some embodiments of the application is shown in the figure.

[0018] Figure 3 The structure of the power distribution unit in some embodiments of the application is shown in the figure. Figure 2 The structure of the power distribution unit in some embodiments of the application is shown in the figure.

[0019] Figure 4 The structure of the power distribution unit in some embodiments of the application is shown in the figure. Figure 2 The structure of the power distribution unit in some embodiments of the application is shown in the figure.

[0020] Figure 5 The structure of the power distribution unit in some embodiments of the application is shown in the figure.

[0021] Figure 6 The structure of the power distribution unit in some embodiments of the application is shown in the figure. Figure 5 The structure of the power distribution unit in some embodiments of the application is shown in the figure.

[0022] Figure 7 The structure of the power distribution unit in some embodiments of the application is shown in the figure. Figure 5 The structure of the power distribution unit in some embodiments of the application is shown in the figure.

[0023] Figure 8 The structure of the power distribution unit in some embodiments of the application is shown in the figure. Figure 5 The structure of the power distribution unit in some embodiments of the application is shown in the figure. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, the present application can also be applied to other similar scenarios without creative labor on the basis of these drawings. Unless it is obvious from the language environment or otherwise stated, the same reference numbers in the drawings represent the same structure or operation.

[0025] The present application sets forth a kind of power distribution unit. Battery Disconnect Unit (PDU) is mainly applied to new energy vehicles, data center, industrial automation etc. The main functions of power distribution unit include charge-discharge control, high-voltage component power-on control, circuit overload short-circuit protection, high-voltage sampling, low-voltage control, etc. To ensure the safe and efficient operation of the system. Power distribution unit plays an important role in modern power system and industrial automation, based on high safety, modularity and scalability and high vibration resistance and other characteristics become indispensable equipment in many fields.

[0026] Please refer to Figure 1 And Figure 2 , Figure 1 The structure diagram of power distribution unit in some embodiments of the present application, Figure 2 For Figure 1 The explosion diagram of power distribution unit in some embodiments of the embodiment shown. Power distribution unit 100 can include housing assembly 10, electronic auxiliary assembly 20, electrical connector 30 and battery management system mainboard 40. Housing assembly 10 can be used to carry and install electronic auxiliary assembly 20, electrical connector 30 and battery management system mainboard 40, and can also carry and install other structures in power distribution unit 100, which will not be described. Electronic auxiliary assembly 20 can be used to realize the functions of automatic adjustment, safety protection, conversion circuit, monitoring and alarm, remote control, etc. of power distribution unit 100, and of course other functions of power distribution unit 100 can also be realized according to selection, design and use. Electronic auxiliary assembly 20 can be electrically connected with battery management system mainboard 40. Electrical connector 30 can realize the circuit connection in power distribution unit 100. Electrical connector 30 can connect electronic auxiliary assembly 20 and battery management system mainboard 40, and also make power distribution unit 100 electrically connected with power supply and load through electrical connector 30. That is, electrical connector 30 can be electrically connected with power supply and load. Battery management system mainboard 40 can be used for charge-discharge control, high-voltage component power-on control, high-voltage sampling, low-voltage control, etc. and can include network interface, control chip and management software, etc. The configuration of electronic components of battery management system mainboard 40 can be carried out according to selection, design and use.

[0027] Please refer to Figure 1 AndFigure 2 The housing assembly 10 can include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are connected to form a mounting space. The mounting space is between the first housing 11 and the second housing 12. The mounting space can be used to mount the electronic auxiliary assembly 20, the electrical connector 30 and / or the battery management system mainboard 40.

[0028] The first housing 11 can be a housing structure, a frame structure, a plate structure or other structures, which are not described herein. Here, the first housing 11 is taken as an example of a plate structure.

[0029] Please refer to Figure 2 The surface of the first housing 11 on the side facing the second housing 12 and the battery management system mainboard 40 can be provided with an adjacent mounting area 101 and a connecting area 102 for assembling the electronic auxiliary assembly 20 and the electrical connector 30. That is, the mounting area 101 and the connecting area 102 can be located on the inner surface of the first housing 11 in the mounting space. The arrangement of the mounting area 101 and the connecting area 102 can facilitate the full use of the internal space of the power distribution unit 100, reduce the volume and miniaturization.

[0030] The mounting area 101 can be used to mount the electronic auxiliary assembly 20. The connecting area 102 can be used to mount the electrical connector 30. The connecting area 102 is arranged adjacent to the edge of the first housing 11, which can make the electrical connector 30 more concentrated, simplify the circuit design inside the power distribution unit 100, and facilitate the quality inspection of the power distribution unit 100, and improve the overall quality control level of the power distribution unit 100. Compared with the mounting area 101, the connecting area 102 is closer to the edge of this side. In some embodiments, the first housing 11 can have a length direction and a width direction orthogonal to each other, the mounting area 101 and the connecting area 102 can be arranged in the width direction and can extend in the length direction. The mounting area 101 is arranged adjacent to the long edge of one side of the first housing 11, and the connecting area 102 is arranged adjacent to the long edge of the other side of the first housing 11. In some embodiments, the area of the mounting area 101 is greater than the area of the connecting area 102. In some embodiments, the first housing 11 can be a circular plate, and the connecting area 102 is arranged around the mounting area 101 and can be connected with the mounting area 101.

[0031] Please refer to Figure 2 and Figure 3 , Figure 3 is Figure 2A structure schematic diagram of the first housing 11 in the embodiment is shown. The mounting area 101 can be divided into multiple areas, such as a relay mounting area 1011, a main fuse device mounting area 1012, a shunt mounting area 1013, and a branch fuse device mounting area 1014, etc. Of course, the mounting area 101 can also be adjusted and divided according to needs. The division of each area in the mounting area 101 can realize the rational arrangement of each component, make the overall volume of the power distribution unit 100 smaller, and be compatible with more vehicle models, thereby realizing the generalization and miniaturization of the power distribution unit 100 design.

[0032] The relay mounting area 1011 can facilitate the horizontal placement of the relay, so as to ensure the dimensional tolerance control in the direction from the first housing 11 to the second housing 12, and the operation is simple.

[0033] In some embodiments, the main fuse device mounting area 1012, the shunt mounting area 1013, and the branch fuse device mounting area 1014 can be arranged around the relay mounting area 1011, so as to simplify the circuit design in the power distribution unit 100. In some embodiments, the main fuse device mounting area 1012, the shunt mounting area 1013, and the branch fuse device mounting area 1014 can all be connected with the relay mounting area 1011. In some embodiments, the branch fuse device mounting area 1014 can be located on the side of the shunt mounting area 1013 away from the connecting area 102, so that the electrical connectors 30 are more concentrated in the connecting area 102, and the circuit design in the power distribution unit 100 is simplified. In some embodiments, the branch fuse device mounting area 1014 can be farther away from the connecting area 102 than the shunt mounting area 1013, so that the electrical connectors 30 are more concentrated in the connecting area 102, and the circuit design in the power distribution unit 100 is simplified. In some embodiments, the shunt mounting area 1013 can be connected with the connecting area 102. In some embodiments, the main fuse device mounting area 1012 is located between the relay mounting area 1011 and the connecting area 102, so that the electrical connectors 30 are more concentrated in the connecting area 102, and the circuit design in the power distribution unit 100 is simplified. In some embodiments, the main fuse device mounting area 1012 can be connected with the connecting area 102. In some embodiments, the relay mounting area 1011 is partially arranged between the main fuse device mounting area 1012 and the shunt mounting area 1013, and is connected with the connecting area 102, so that the electrical connectors 30 are more concentrated in the connecting area 102, and the circuit design in the power distribution unit 100 is simplified.

[0034] The relay mounting area 1011 can be used to mount relays, and can be specifically set according to the type of relay. In some embodiments, the relay mounting area 1011 can be divided into multiple areas for multiple relays, such as a heating relay mounting area 1001, a main positive relay mounting area 1002, a fast charging relay mounting area 1003, and a main negative relay mounting area 1004, and of course, the relay mounting area 1011 can also be adjusted and divided into areas as needed.

[0035] In some embodiments, the relay mounting area 1011 corresponding to the bottom of the relay can be provided with a heat dissipation hole 1101 to reserve space for heat dissipation at the bottom of the heat dissipation hole 1101, so that the first shell 11 does not contact the bottom of the relay in its entirety. In some embodiments, the heat dissipation hole 1101 can pass through the first shell 11. In some embodiments, the heat dissipation hole 1101 can be a blind hole, which can also be referred to as a groove provided on the surface of the first shell 11 towards the second shell 12, the battery management system mainboard 40. In some embodiments, in order to achieve heat dissipation of the relay mounting area 1011, a heat dissipation gap can also be reserved between the first shell 11 and the relay, and a liquid cooling heat dissipation device can also be provided on the first shell 11 to achieve heat dissipation of the power distribution unit 100, and of course, at least the relay can also be cooled.

[0036] In some embodiments, the heating relay mounting area 1001, the main positive relay mounting area 1002, the fast charging relay mounting area 1003, and the main negative relay mounting area 1004 can be arranged in the extension direction of the mounting area 101 or the extension direction of the connection area 102, so that the electrical connectors 30 are more concentrated in the connection area 102, simplifying the circuit design in the power distribution unit 100. In some embodiments, the extension direction of the connection area 102 can be a ring direction, and then the heating relay mounting area 1001, the main positive relay mounting area 1002, the fast charging relay mounting area 1003, and the main negative relay mounting area 1004 can be arranged in a ring around the mounting area 101. In some embodiments, the heating relay mounting area 1001, the main positive relay mounting area 1002, the fast charging relay mounting area 1003, and the main negative relay mounting area 1004 can be arranged in sequence in the extension direction of the mounting area 101 or the extension direction of the connection area 102. In some embodiments, the heating relay mounting area 1001 can be located on the side of the main fuse mounting area 1012 away from the connection area 102. That is, the main fuse mounting area 1012 can be located between the heating relay mounting area 1001 and the connection area 102. In some embodiments, the heating relay mounting area 1001 can be connected to the main fuse mounting area 1012. In some embodiments, the heating relay mounting area 1001 can be connected to the main positive relay mounting area 1002. In some embodiments, the main positive relay mounting area 1002 can be connected to the fast charging relay mounting area 1003. In some embodiments, the fast charging relay mounting area 1003 can be connected to the main negative relay mounting area 1004. In some embodiments, the shunt mounting area 1013 and the branch fuse mounting area 1014 can be located on the side of the main negative relay mounting area 1004 away from the fast charging relay mounting area 1003. That is, the main negative relay mounting area 1004 can be located between the shunt mounting area 1013 and the fast charging relay mounting area 1003, and the main negative relay mounting area 1004 can be located between the branch fuse mounting area 1014 and the fast charging relay mounting area 1003. In some embodiments, the shunt mounting area 1013 and the branch fuse mounting area 1014 can be connected to the main negative relay mounting area 1004. In some embodiments, the main positive relay mounting area 1002, the fast charging relay mounting area 1003, the main negative relay mounting area 1004, the main fuse mounting area 1012, and the shunt mounting area 1013 are arranged in the extension direction of the mounting area 101 or the extension direction of the connection area 102 and are connected to the connection area 102.

[0037] In some embodiments, the heat dissipation holes 1101 can be provided in the heating relay mounting area 1001, the main positive relay mounting area 1002, the fast charging relay mounting area 1003, and the main negative relay mounting area 1004.

[0038] In some embodiments, the relay mounting area 1011 corresponding to the relay can be provided with a buckle assembly 111 to buckle connect with the relay to achieve detachable connection. In some embodiments, the buckle assembly 111 can include two buckle pieces oppositely arranged to enable the relay to be located between the two buckle pieces and buckle connect with the two buckle pieces to achieve detachable connection. In some embodiments, at least one relay is provided with one buckle assembly 111.

[0039] In some embodiments, the buckle assembly 111 can be arranged in the heating relay mounting area 1001, the main positive relay mounting area 1002, the fast charging relay mounting area 1003, or the main negative relay mounting area 1004.

[0040] In some embodiments, the relay mounting area 1011 corresponding to the bottom of the relay can be provided with an elastic piece 112 to adjust the distance between the relay and the first shell 11 through elastic deformation. In addition, the relay can also be accommodated at least by the elastic piece 112 to achieve installation and disassembly of the relay. In some embodiments, the elastic piece 112 can be a spring, a torsional spring, or other structures. In some embodiments, the elastic piece 112 can be a cantilever structure formed by the first shell 11 being hollowed out. In some embodiments, the design of the elastic piece 112 can reduce the probability of failure caused by machining errors of the first shell 11.

[0041] In some embodiments, the elastic piece 112 can cooperate with the buckle assembly 111 to buckle set the relay to achieve detachable installation of the relay. The elastic deformation of the elastic piece 112 can exert an action force on the relay to move away from the elastic piece 112, and the relay moving away from the elastic piece 112 will be limited by the buckle assembly 111, thereby achieving installation of the elastic piece 112. When installing the relay, the relay is directly placed between the two buckle pieces, pressed towards the side close to the elastic piece 112, and the relay is brought into abutment with the elastic piece 112, further causing the elastic piece 112 to elastically deform until the relay buckle connects with the buckle assembly 111, at which time the elastic deformation of the elastic piece 112 can exert an action force on the relay to move away from the elastic piece 112, and the buckle assembly 111 cooperates to buckle set the relay. When disassembling the relay, the relay can be pressed towards the side close to the elastic piece 112, causing the elastic piece 112 to further elastically deform until the relay is disconnected from the buckle connection state with the buckle assembly 111, and then the hand is released, relying on the elastic deformation of the elastic piece 112 to cause the relay to slide out from between the two buckle pieces.

[0042] In some embodiments, the elastic piece 112 can be arranged in the heating relay mounting area 1001, the main positive relay mounting area 1002, the fast charging relay mounting area 1003, or the main negative relay mounting area 1004.

[0043] In some embodiments, the elastic member 112 can be provided with the heat dissipation hole 1101 in the above embodiments.

[0044] In some embodiments, the first shell 11 can be provided with a positioning groove or a fence to position and limit the relays. For example, the relays can be placed in the positioning groove. For example, the fence can be arranged around the relays. In some embodiments, the positioning groove or the fence can be arranged in the relay mounting area 1011. In some embodiments, the positioning groove or the fence can be arranged in the heating relay mounting area 1001, the main positive relay mounting area 1002, the fast charging relay mounting area 1003, or the main negative relay mounting area 1004.

[0045] In some embodiments, the main fuse mounting area 1012 is provided with a mounting table 113 to fully utilize the space. The mounting table 113 can fully utilize the space in the direction (height direction, vertical direction) from the first shell 11 to the second shell 12, which reduces the size of the power distribution unit 100 as a whole, and also facilitates the vertical placement of the main fuse, and further facilitates quality inspection. In some embodiments, the shunt mounting area 1013 is provided with an assembly table 114 to fully utilize the space. The assembly table 114 can fully utilize the space in the direction from the first shell 11 to the second shell 12, which reduces the size of the power distribution unit 100 as a whole, and also facilitates the vertical placement of the shunt, and further facilitates quality inspection. In some embodiments, the branch fuse mounting area 1014 is provided with a support table 115 to fully utilize the space, and also to improve the installation efficiency and provide convenience for maintenance. In some embodiments, the support table 115 is further provided with an insulating spacer 116 to achieve electrical isolation between devices, and also to prevent the wire harness ring terminal from rotating and electrically connecting with the branch fuse 24.

[0046] The second shell 12 can be a shell structure, a frame structure, a plate structure, or other structures, which will not be described herein. Here, the second shell 12 is taken as an example of a plate structure. The second shell 12 can be fixed with the first shell 11 by screwing, welding, plugging, buckling, or bonding, etc. to form a mounting space between the first shell 11 and the second shell 12.

[0047] Please refer to Figure 2 , Figure 3 and Figure 4 , Figure 4 as Figure 2A schematic view of the structure of the first shell 11, the electronic auxiliary assembly 20 and the electrical connector 30 in the illustrated embodiment. The electronic auxiliary assembly 20 can include a plurality of electronic auxiliary devices such as a relay 21, a fuse device, a shunt 23 and the like, and can also include other types of electronic auxiliary devices well known in the art, which will not be described herein. At least some of the plurality of electronic auxiliary devices are electrically connected to the battery management system main board 40 and can be electrically connected to the electrical connector 30.

[0048] The relay 21 can include a main positive relay 211 mounted on a side of the first shell 11 facing the second shell 12, the battery management system main board 40. The main positive relay 211 can be fixed on the first shell 11 by screwing, welding, plugging, snap connection or bonding, etc. In some embodiments, the main positive relay 211 can be mounted in the relay mounting area 1011, such as the main positive relay mounting area 1002. In some embodiments, the main positive relay 211 can be mounted on the first shell 11 by snap connection with the snap assembly 111. In some embodiments, the main positive relay 211 can be fixed by the snap assembly 111 cooperating with the elastic member 112. In some embodiments, a side of the main positive relay 211 facing the connection area 102 is electrically connected to the electrical connector 30. In some embodiments, a side of the main positive relay 211 facing the second shell 12, the battery management system main board 40, can be electrically connected to the battery management system main board 40, and thus can be controlled by the battery management system main board 40.

[0049] The relay 21 can include a fast charging relay 212 mounted on a side of the first shell 11 facing the second shell 12, the battery management system main board 40. The fast charging relay 212 can be fixed on the first shell 11 by screwing, welding, plugging, snap connection or bonding, etc. In some embodiments, the fast charging relay 212 can be mounted in the relay mounting area 1011, such as the fast charging relay mounting area 1003. In some embodiments, the fast charging relay 212 can be mounted on the first shell 11 by snap connection with the snap assembly 111. In some embodiments, the fast charging relay 212 can be fixed by the snap assembly 111 cooperating with the elastic member 112. In some embodiments, a side of the fast charging relay 212 facing the connection area 102 is electrically connected to the electrical connector 30. In some embodiments, a side of the fast charging relay 212 facing the second shell 12, the battery management system main board 40, can be electrically connected to the battery management system main board 40, and thus can be controlled by the battery management system main board 40.

[0050] The relay 21 can include a main negative relay 213 installed on the first housing 11 toward the second housing 12, one side of the battery management system main board 40. The main negative relay 213 can be fixed on the first housing 11 by screwing, welding, plugging, snap connection, or bonding, etc. In some embodiments, the main negative relay 213 can be installed on the relay installation area 1011, for example, the main negative relay installation area 1004. In some embodiments, the main negative relay 213 can be installed on the first housing 11 by snap connection with the snap assembly 111. In some embodiments, the main negative relay 213 can be fixed by the snap assembly 111 cooperating with the elastic member 112. In some embodiments, the main negative relay 213 toward the connection area 102 side can be electrically connected with the electrical connection member 30. In some embodiments, the main negative relay 213 toward the second housing 12, one side of the battery management system main board 40, can be electrically connected with the battery management system main board 40, and thus can be controlled by the battery management system main board 40.

[0051] The relay 21 can include a heating relay 214 installed on the first housing 11 toward the second housing 12, one side of the battery management system main board 40. The heating relay 214 can be fixed on the first housing 11 by screwing, welding, plugging, snap connection, or bonding, etc. In some embodiments, the heating relay 214 can be installed on the relay installation area 1011, for example, the heating relay installation area 1001. In some embodiments, the heating relay 214 can be installed on the first housing 11 by snap connection with the snap assembly 111. In some embodiments, the heating relay 214 can be fixed by the snap assembly 111 cooperating with the elastic member 112. In some embodiments, the heating relay 214 toward the second housing 12, one side of the battery management system main board 40, can be electrically connected with the battery management system main board 40, and thus can be controlled by the battery management system main board 40.

[0052] The fuse device can include a main fuse device 22 installed on the first housing 11 toward the second housing 12, one side of the battery management system main board 40. The main fuse device 22 can be fixed on the first housing 11 by screwing, welding, plugging, snap connection, or bonding, etc. In some embodiments, the main fuse device 22 can be installed on the main fuse device installation area 1012. In some embodiments, the main fuse device 22 is installed on the installation table 113 toward the connection area 102 side, and can be electrically connected with the electrical connection member 30. The installation table 113 can make full use of the space in the direction from the first housing 11 to the second housing 12 to install the main fuse device 22, which reduces the size of the power distribution unit 100 as a whole, and also facilitates the vertical placement of the main fuse device 22, and further facilitates quality inspection.

[0053] The insurance device can include a branch insurance device 24 installed on one side of the first shell 11 towards the second shell 12, the battery management system mainboard 40. The branch insurance device 24 can be fixed on the first shell 11 by screwing, welding, plugging, buckling connection or bonding, etc. In some embodiments, the branch insurance device 24 can be installed in the branch insurance device installation area 1014. In some embodiments, one end of the branch insurance device 24 can be installed on the support table 115, and the other end can be installed on the first shell 11, so that the branch insurance device 24 can be lifted by the support table 115, which can improve the installation efficiency and provide convenience for maintenance. In some embodiments, the branch insurance device 24 can be multiple, and adjacent two can be separated by an insulating separator 116 to achieve electrical isolation, and also to prevent the wire harness ring terminal from rotating and electrically connecting with the branch insurance device 24. In some embodiments, the branch insurance device 24 can be used according to the needs and designed in the circuit of the power distribution unit 100. For example, it can be electrically connected with the electrical connector 30.

[0054] The shunt 23 can be fixed on the first shell 11 by screwing, welding, plugging, buckling connection or bonding, etc. In some embodiments, the shunt 23 can be installed in the shunt installation area 1013. In some embodiments, the shunt 23 is installed on one side of the assembly table 114 towards the connection area 102, and can be electrically connected with the electrical connector 30. The assembly table 114 can make full use of the space in the direction from the first shell 11 to the second shell 12 to install the shunt 23, which can reduce the size of the power distribution unit 100 as a whole, and can facilitate the vertical placement of the shunt 23 and the quality inspection.

[0055] The electrical connector 30 can be provided in the connection area 102 to realize the circuit connection of the power distribution unit 100. Of course, the electrical connector 30 can also extend into the installation area 101 to realize the circuit connection of the power distribution unit 100. The electrical connector 30 can include sheet-shaped body, wire, columnar body, bolt and nut matching body, connection terminal assembly and other conductive structures, and can also be provided according to the technology familiar in the art.

[0056] The electrical connector 30 can be electrically connected with the main positive relay 211, the fast charging relay 212 and the main negative relay 213. In some embodiments, one end of the main positive relay 211 and one end of the fast charging relay 212 can be electrically connected with the battery, for example, the positive electrode, through the electrical connector 30, one end of the main negative relay 213 can be electrically connected with the battery, for example, the negative electrode, through the electrical connector 30, the main negative relay 213 cooperates with the main positive relay 211 to be connected with the load through the electrical connector 30, and the main negative relay 213 cooperates with the fast charging relay 212 to be connected with the external power supply, and the main positive relay 211, the fast charging relay 212, the main negative relay 213 and the heating relay 214 can be electrically connected with the battery management system mainboard 40.

[0057] In some embodiments, the main fuse device 22 can be electrically connected between the main positive relay 211 and the battery, for example, the positive terminal, through the electrical connection 30. In some embodiments, the main fuse device 22 can be electrically connected between the fast charging relay 212 and the battery, for example, the positive terminal, through the electrical connection 30. In some embodiments, the shunt 23 can be electrically connected between the main negative relay 213 and the battery, for example, the negative terminal, through the electrical connection 30.

[0058] Referring to Figure 2 , the battery management system main board 40 can include the second housing 12 (the second housing 12 can be a structure shared by the housing assembly 10 and the battery management system main board 40, which is not described in detail) and the main board body 41. The main board body 41 serves as the main structure of the battery management system main board 40 and undertakes the functions of the battery management system main board 40. The main board body 41 can be arranged on the side of the second housing 12 away from the first housing 11 and electrically connected with at least part of the plurality of electronic auxiliary devices, for example, the relays 21.

[0059] It can be understood that the electrical connection between the electronic auxiliary assembly 20, the electrical connection 30 and the battery management system main board 40 in the power distribution unit 100 can be achieved through the connection terminal assembly. In some embodiments, the electrical connection 30 can include the connection terminal assembly. In some embodiments, the electronic auxiliary assembly 20 and the electrical connection 30 are electrically connected through the connection terminal assembly. In some embodiments, the electronic auxiliary assembly 20 and the battery management system main board 40 are electrically connected through the connection terminal assembly. In some embodiments, the plurality of electronic auxiliary devices can be electrically connected through the connection terminal assembly. In some embodiments, at least part of the plurality of electronic auxiliary devices and the battery management system main board 40, for example, the main board body 41, are electrically connected through the connection terminal assembly. In some embodiments, the electrical connection 30 connects at least part of the plurality of electronic auxiliary devices through the connection terminal assembly.

[0060] Next, a connection terminal assembly is described, which can reduce the wiring harness design in the power distribution unit 100 and can also minimize installation errors and / or processing errors, so that two devices can be electrically connected through the connection terminal assembly.

[0061] Referring to Figure 5 , Figure 5Figure 1 is a schematic diagram of a connection terminal assembly according to some embodiments of the present application. The connection terminal assembly 200 can include a female terminal 50 and a male terminal 60. The female terminal 50 and the male terminal 60 can be inserted to achieve electrical connection. In some embodiments, the female terminal 50 can be provided on one of two electrically connected devices, and the male terminal 60 can be provided on the other of the two electrically connected devices, so that the two devices are electrically connected through the female terminal 50 and the male terminal 60. In some embodiments, the female terminal 50 can be provided on a battery management system main board 40, such as a main board body 41, and the male terminal 60 can be provided on a relay 21. In some embodiments, the female terminal 50 can be provided on an electric connector 30, and the male terminal 60 can be provided on the relay 21.

[0062] Referring to Figure 1, the female terminal 50 can include a bearing shell 51 and an insertion body 52. The bearing shell 51 is used to achieve detachable or fixed connection with other devices to achieve electrical connection between the two, and is used to bear the insertion body 52. The insertion body 52 can be mounted on the bearing shell 51 and can be movably connected with the bearing shell 51 to achieve electrical connection, and can be inserted with the male terminal 60 to achieve electrical connection. Figure 5

[0063] The bearing shell 51 can be a frame structure, a shell structure, or even other structures known in the art. The bearing shell 51 can be made of conductive material, or can be partially made of conductive material to achieve electrical connection with other structures.

[0064] The bearing shell 51 can have an assembly space 5101 and a socket 5102 in communication with the assembly space 5101. The assembly space 5101 can be used to accommodate the insertion body 52. The socket 5102 can be used for the male terminal 60 to be inserted into the assembly space 5101, so that the male terminal 60 can be inserted with the insertion body 52.

[0065] The bearing shell 51 can include a bearing body 511, which can be located around the insertion body 52 and cooperate with the insertion body 52 to achieve mounting of the insertion body 52.

[0066] In some embodiments, the bearing body 511 can have a soldering pin 512 to achieve detachable or fixed connection with other devices to achieve electrical connection between the two. In some embodiments, the soldering pin 512 can be located on the side of the bearing body 511 away from the socket 5102.

[0067] ​In some embodiments, the carrying body 511 can be provided with a mounting opening 5103 which is in communication with the assembly space 5101. The mounting opening 5103 can be used to assemble the plug-in body 52 in the assembly space 5101. In some embodiments, the carrying body 511 can be provided with a limiting portion 513 at the edge of the mounting opening 5103. The limiting portion 513 can abut against the plug-in body 52 to limit the plug-in body 52 from sliding out of the assembly space 5101 from the mounting opening 5103. In some embodiments, the limiting portion 513 can be formed by bending the carrying body 511 inwardly from the edge of the mounting opening 5103 into the assembly space 5101. In some embodiments, the mounting opening 5103 can be located at the side of the carrying body 511 which is away from the socket 5102. In some embodiments, the carrying body 511 can also be provided with the soldering pin 512 at the edge of the mounting opening 5103 as described in the above embodiments.

[0068] In some embodiments, the carrying body 511 can be provided with a limiting groove 5104 in the assembly space 5101 to cooperate with the plug-in body 52 to limit the plug-in body 52. In some embodiments, the limiting groove 5104 can be a blind groove. In some embodiments, the limiting groove 5104 can extend in a first direction which is transverse to the insertion direction of the male terminal 60, so that the plug-in body 52 can slide in the limiting groove 5104 in the first direction. That is, the limiting groove 5104 can also be replaced by a guide structure such as a sliding rail, a guide rail or the like, so that the plug-in body 52 can slide in the first direction. In some embodiments, the limiting groove 5104 can cooperate with the limiting portion 513 to limit the plug-in body 52. In some embodiments, the plug-in body 52 can be limited only by the limiting groove 5104. In some embodiments, the plug-in body 52 can be limited only by the guide structure. In some embodiments, the first direction can be arranged perpendicularly to the insertion direction of the male terminal 60.

[0069] Referring to Figure 5 The plug-in body 52 can be a frame structure, a housing structure or even other structures known in the art. The plug-in body 52 can be made of an electrically conductive material, or can be partially made of an electrically conductive material to electrically connect with other structures.

[0070] The plug-in body 52 can be located in the assembly space 5101 and correspond to the socket 5102, so that when the male terminal 60 is inserted into the assembly space 5101 from the socket 5102, the plug-in body 52 is plugged with the male terminal 60 to achieve electrical connection. In some embodiments, the plug-in body 52 can be slidably connected with the carrying shell 51 such as the carrying body 511 in the first direction, and can maintain the plugging state of the plug-in body 52 with the male terminal 60 and the electrical connection state of the plug-in body 52 with the carrying body 511 during sliding. It can be understood that the cooperation of the plug-in body 52 with the carrying shell 51 such as the carrying body 511 can overcome the installation error and / or machining error in the first direction as much as possible.

[0071] The connector 52 may have an insertion space 5201. When the connector 52 is inserted into the male terminal 60, the male terminal 60 can be inserted into the insertion space 5201. In some embodiments, with the male terminal 60 placed in the socket 5102 and the insertion space 5201, the connector 52 abuts against the male terminal 60, and the insertion space 5201 is configured to allow the male terminal 60 to slide in a second direction. The second direction may intersect with the insertion direction of the male terminal 60. In some embodiments, the second direction intersects with a first direction. In some embodiments, the plane containing the second direction and the first direction may intersect with the insertion direction of the male terminal 60. In some embodiments, the plane containing the second direction and the first direction may be perpendicular to the insertion direction of the male terminal 60. In some embodiments, the second direction may be perpendicular to the first direction. In some embodiments, the male terminal 60 may be slidably connected to the connector 52 in the second direction, and the connector 52 and the male terminal 60 may remain in the inserted state during sliding.

[0072] Understandably, the fit between the connector 52 and the male terminal 60 can minimize installation and / or manufacturing errors in the second direction. Furthermore, it can minimize installation and / or manufacturing errors in the planes containing the female terminal 50 and the male terminal 60 in the second and first directions.

[0073] Please see Figure 6 , Figure 7 and Figure 8 , Figure 6 for Figure 5 A schematic diagram of the connector 52 in the illustrated embodiment. Figure 7 for Figure 5 The illustrated embodiment shows a cross-sectional view of the connector 52 in some embodiments. Figure 8 for Figure 5 The illustrated embodiment shows a cross-sectional view of the connector 52 in other embodiments. The connector 52 may include a connector body 521, a first spring assembly 522, and a second spring assembly 523. The connector body 521 may be disposed within the assembly space 5101 and may be limited by the carrier housing 51. In some embodiments, the connector body 521 may be limited by a limiting portion 513 to prevent it from sliding out of the assembly space 5101 from the mounting opening 5103. The first spring assembly 522 and the second spring assembly 523 may be spaced apart in a first direction, and an insertion space 5201 may be formed between the first spring assembly 522 and the second spring assembly 523. Furthermore, when the male terminal 60 is placed in the socket 5102 and the insertion space 5201, the first spring assembly 522 and / or the second spring assembly 523 elastically abut against the male terminal 60, and the insertion space 5201 is configured to allow the male terminal 60 to slide in a second direction.

[0074] The plug-in body 521 can be provided with a clamping portion 524 extending into the limiting groove 5104 to limit the plug-in body 521 from sliding out of the assembly space 5101 from the plug opening 5102 by the bearing shell 51 such as the bearing body 511. In some embodiments, the clamping portion 524 can be provided on opposite sides of the plug-in body 521 in the second direction. In some embodiments, the clamping portion 524 can slide in the limiting groove 5104 in the first direction. In some embodiments, one end of the clamping portion 524 is connected to the plug-in body 521 and is bent towards the side close to the plug opening 5102 to limit the plug-in body 521 from sliding out of the assembly space 5101 from the plug opening 5102 in the limiting groove 5104.

[0075] It can be understood that the cooperation between the plug-in body 521 and the bearing shell 51 such as the bearing body 511 can interchange the arrangement positions of the clamping portion 524 and the limiting groove 5104, so that the limiting groove 5104 can be arranged on the plug-in body 521 and the clamping portion 524 can be arranged on the bearing shell 51 such as the bearing body 511.

[0076] In some embodiments, the plug-in body 521 can be provided with a notch corresponding to the position of the limiting portion 513 to accommodate the limiting portion 513 to realize the mutual positioning between the plug-in body 521 and the bearing shell 51 such as the bearing body 511. It can be understood that the limiting portion 513 can also be arranged on the edge of the plug opening 5102 to cooperate with the plug-in body 521. Further, the limiting portion 513 cooperates with the limiting groove 5104.

[0077] The plug-in body 521 is provided with elastic limiting portions 525 on opposite sides in the first direction, which can abut against the bearing shell 51 such as the bearing body 511 in the assembly space 5101 to reset the plug-in body 521 in the first direction. In some embodiments, the elastic limiting portions 525 can also be arranged on the bearing shell 51 such as the bearing body 511. In some embodiments, the elastic limiting portions 525 can also be arranged on the bearing shell 51 such as the bearing body 511 without being arranged on the plug-in body 521.

[0078] The first elastic sheet assembly 522 and the second elastic sheet assembly 523 each can include at least one elastic sheet. In the first elastic sheet assembly 522 or the second elastic sheet assembly 523, the at least one elastic sheet can be arranged in the second direction to achieve sufficient contact with the male terminal 60. In some embodiments, in the first elastic sheet assembly 522 or the second elastic sheet assembly 523, the at least one elastic sheet can be arranged in the second direction at intervals or connected. In some embodiments, the elastic sheet has one end connected to the plug body 521 and extends to the side away from the insertion opening 5102. In some embodiments, the elastic sheet can be arranged at the edge of the insertion opening 5102 to make the plug body 52 more smooth at the insertion opening 5102, facilitating insertion of the male terminal 60. In some embodiments, the elastic sheet can include an elastic arm 5231 and an abutting portion 5232. The abutting portion 5232 is used to abut against the male terminal 60, and the elastic arm 5231 is connected to the abutting portion 5232 and extends outwardly from the assembly space 5101 to make the plug body 52 more smooth at the insertion opening 5102, facilitating insertion of the male terminal 60.

[0079] Referring to Figure 5 , the male terminal 60 can be a columnar structure, a sheet structure, or other structures. The male terminal 60 can be inserted into the insertion space 5201 from the insertion opening 5102, the elastic sheet in the first elastic sheet assembly 522 and / or the second elastic sheet assembly 523 elastically abuts against the male terminal 60, and the insertion space 5201 is arranged for the male terminal 60 to slide in the second direction. The male terminal 60 can slide in the first direction and / or the second direction to overcome installation errors and / or machining errors in the first direction as much as possible.

[0080] Referring to Figure 5 , the male terminal 60 can slide in the first direction, press against the first elastic sheet assembly 522, for example, the elastic sheet, so that the first elastic sheet assembly 522, for example, the elastic sheet, elastically deforms and maintains an electrically connected state with the male terminal 60, while the second elastic sheet assembly 523, for example, the elastic sheet, elastically returns, so that the second elastic sheet assembly 523, for example, the elastic sheet, maintains an electrically connected state with the male terminal 60. At the same time, the elastic limiting portion 525 on the same side of the first elastic sheet assembly 522 of the plug body 521 also elastically deforms under the extrusion of the bearing shell 51, for example, the bearing body 511, and the plug body 521, and gives way to the plug body 521. The elastic limiting portion 525 on the side different from the first elastic sheet assembly 522 of the plug body 521 elastically returns and maintains the effect of abutting against the bearing shell 51, for example, the bearing body 511. The clamping portion 524 and the limiting groove 5104 can limit the plug body 521. When the male terminal 60 is pulled out of the assembly space 5101, the elastic limiting portion 525 resets the plug body 521.

[0081] Referring to Figure 5When the male terminal 60 slides in the first direction, the second spring piece assembly 523, for example, the elastic piece, is pressed and elastically deformed, and the male terminal 60 is kept in an electrically connected state, and the first spring piece assembly 522, for example, the elastic piece, elastically returns, and the male terminal 60 is kept in an electrically connected state. Meanwhile, the elastic limiting portion 525 on the same side of the second spring piece assembly 523 with the plug-in main body 521 is also elastically deformed under the extrusion of the bearing shell 51, for example, the bearing main body 511, and the plug-in main body 521 is given space. The elastic limiting portion 525 on the side different from the second spring piece assembly 523 with the plug-in main body 521 elastically returns and keeps the effect of abutting against the bearing shell 51, for example, the bearing main body 511. The clamping portion 524 and the limiting groove 5104 can limit the plug-in main body 521. When the male terminal 60 is pulled out from the assembly space 5101, the elastic limiting portion 525 resets the plug-in main body 521.

[0082] Please refer to Figure 5 When the male terminal 60 slides in the second direction, the male terminal 60 slides in the gap between the first spring piece assembly 522 and the second spring piece assembly 523, and the electrically connected state of the first spring piece assembly 522, for example, the elastic piece, and the male terminal 60 is kept, and the electrically connected state of the second spring piece assembly 523, for example, the elastic piece, and the male terminal 60 is kept.

[0083] The application replaces the ground wire bundle electric connection scheme in the power distribution unit 100 as much as possible through the connection terminal assembly 200, and considers that there is a certain size tolerance in the assembly process of the power distribution unit 100 and the machining error of each structure in the power distribution unit 100. The reliability connection is realized by adjusting in the first direction and the second direction, and the automatic assembly of the power distribution unit 100 is provided.

[0084] In addition, the setting of the connection terminal assembly 200 can reduce the bolted structure in the power distribution unit 100 and improve the production efficiency.

[0085] The above has described the basic concept, and it is obvious that the above detailed disclosure is only used as an example and does not constitute a limitation on the application for those skilled in the art. Although it is not explicitly stated here, those skilled in the art can make various modifications, improvements and corrections to the application. Such modifications, improvements and corrections are suggested in the application, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the application.

[0086] Meanwhile, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this application do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0087] Furthermore, unless expressly stated in the claims, the order of elements and sequences processed in this application, the use of numbers and letters, or the use of other names are not intended to limit the order of the processes and methods of this application. Although some embodiments that are currently considered useful have been discussed through various examples in the foregoing disclosure, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments of this application. For example, while the system components described above can be implemented by hardware devices, they can also be implemented solely by software solutions, such as installing the described system on existing servers or mobile devices.

[0088] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0089] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in this application are approximate values, which may be changed according to the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit preservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this application are approximate values, in specific embodiments, such numerical values ​​are set as precisely as feasible.

[0090] Each of the patents, patent applications, patent publications, and other materials, such as articles, books, applications, publications, documents, and the like, referenced in the present application are hereby incorporated by reference into the present application in their entirety. Application history documents that are inconsistent or in conflict with the content of the present application, or that limit the broadest scope of the claims of the present application, are excluded from the present application, as are any documents added to the present application after the date of the present application. It is specifically noted that if there is a discrepancy between the descriptions, definitions, and / or terminology used in the present application and that used in the materials incorporated by reference into the present application, the descriptions, definitions, and / or terminology used in the present application control.

[0091] Finally, it should be understood that the embodiments of the present application are merely illustrative of the principles of this application. Other embodiments can be devised which fall within the scope of the present application. Accordingly, the embodiments of the present application are not to be considered as limited in scope to the embodiments specifically described and illustrated herein.

Claims

1. A power distribution unit, characterized by, The battery management system comprises a first shell, a battery management system mainboard, a plurality of electronic auxiliary devices and an electrical connector. The battery management system mainboard is installed on the first shell, forming an installation space between the battery management system mainboard and the first shell. The plurality of electronic auxiliary devices and the electrical connector are installed in the installation space. At least part of the plurality of electronic auxiliary devices are electrically connected to the battery management system mainboard. The surface of the side of the first shell facing the battery management system mainboard is provided with an adjacent installation area and a connection area. The plurality of electronic auxiliary devices are arranged in the installation area, and the electrical connector is arranged in the connection area and electrically connected to at least part of the plurality of electronic auxiliary devices. The power distribution unit is arranged to be electrically connected to the power supply and the load through the electrical connector.

2. The power distribution unit of claim 1, wherein, The connection area is arranged adjacent to the edge of the first shell.

3. The power distribution unit of claim 1, wherein, The plurality of electronic auxiliary devices comprise a relay, which is clamped on the first shell and electrically connected to the battery management system mainboard.

4. The power distribution unit of claim 3, wherein, The relay comprises a main positive relay, a main negative relay and a fast charging relay. The installation area comprises a main positive relay installation area for installing the main positive relay, a main negative relay installation area for installing the main negative relay and a fast charging relay installation area for installing the fast charging relay. The main positive relay installation area is provided with heat dissipation holes corresponding to the area of the bottom of the main positive relay. The main negative relay installation area is provided with heat dissipation holes corresponding to the area of the bottom of the main negative relay. The fast charging relay installation area is provided with heat dissipation holes corresponding to the area of the bottom of the fast charging relay. The main positive relay, the main negative relay and the fast charging relay are electrically connected to the electrical connector.

5. The power distribution unit of claim 3, wherein, The relay comprises a heating relay. The installation area comprises a heating relay installation area. The heating relay installation area is provided with two buckles arranged opposite to each other. The heating relay is located between the two buckles. The heating relay installation area is provided with an elastic member corresponding to the bottom of the heating relay. The elastic member cooperates with the two buckles to clamp the heating relay.

6. The power distribution unit of claim 1, wherein, The plurality of electronic auxiliary devices comprise a main fuse device. The installation area comprises a main fuse device installation area. The main fuse device installation area is provided with an installation table. The main fuse device is arranged on one side of the installation table close to the connection area and is electrically connected to the electrical connector.

7. The power distribution unit of claim 1, wherein, The plurality of electronic auxiliary devices comprise a shunt. The installation area comprises a shunt installation area. The shunt installation area is provided with an assembly table. The shunt is arranged on one side of the assembly table close to the connection area and is electrically connected to the electrical connector.

8. The power distribution unit of claim 1, wherein, The plurality of electronic auxiliary devices comprise branch fuse devices. The installation area comprises a branch fuse device installation area. The branch fuse device installation area is provided with a support table. One end of the branch fuse device is installed on the support table, and the other end is installed on the first shell.

9. The power distribution unit of claim 8, wherein, The branch fuse devices are a plurality of branch fuse devices. The support table is provided with an insulating isolation member between adjacent two branch fuse devices.

10. The power distribution unit of claim 1, wherein, The battery management system mainboard comprises a second shell and a mainboard body, the second shell is connected with the first shell to form the installation space between the first shell and the second shell, and the mainboard body is arranged on the side of the second shell away from the first shell and electrically connected with at least part of the plurality of electronic auxiliary devices.

11. The power distribution unit of any of claims 1-10, wherein, The installation area comprises a main positive relay installation area, a main negative relay installation area, a fast charging relay installation area, a heating relay installation area, a main fuse device installation area, a branch fuse device installation area and a shunt installation area, the main positive relay installation area, the main negative relay installation area, the fast charging relay installation area, the main fuse device installation area and the shunt installation area are arranged in the extension direction of the connection area and connected with the connection area, the heating relay installation area is located on the side of the main fuse device installation area away from the connection area, and the branch fuse device installation area is located on the side of the shunt installation area away from the connection area.

12. The power distribution unit of any of claims 1-10, wherein, The plurality of electronic auxiliary devices comprise a main positive relay, a main negative relay, a fast charging relay, a heating relay, a main fuse device, a branch fuse device and a shunt, one end of the main fuse device and one end of the shunt are matched to be electrically connected with the battery, the other end of the main fuse device is electrically connected with the main positive relay and the fast charging relay respectively, the other end of the shunt is electrically connected with the main negative relay, the main negative relay is matched with the main positive relay to be connected with the load, the main negative relay is matched with the fast charging relay to be connected with an external power supply, and the main positive relay, the main negative relay, the fast charging relay and the heating relay are electrically connected with the battery management system mainboard.

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