Power distribution apparatus and charging device

Abstract

The embodiment of the application provides a power distribution device and a charging device comprising the power distribution device, and relates to the technical field of energy. The power distribution device is used for distributing input current into at least one path and outputting, wherein the power distribution device comprises a mounting seat, a busbar and a switch matrix assembly. The busbar is fixed on the mounting seat and is used for inputting or outputting current. The switch matrix assembly comprises a shell, a first circuit board, switch devices and a metal sheet. The shell is fixed on the mounting seat. The shell has an opening in communication with an internal space of the shell, and the opening faces the mounting seat. The first circuit board is fixed in the shell. The switch devices are fixed on the first circuit board. The metal sheet is fixed on a board surface of the first circuit board facing the opening. The metal sheet is electrically connected to at least one of the switch devices. One of the busbars passes through the opening and is connected to the other busbar.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy, in particular to a power distribution device and a charging device. BACKGROUND

[0002] In a charging station, the current output by a power module usually needs to be distributed to a corresponding charging interface through a power distribution device. The connection between the power module and the power distribution device, and the connection within the power distribution device itself, mainly rely on copper bars for switching.

[0003] In the prior art, the switching devices (e.g., relays) of the power distribution device are usually placed separately. After switching through multiple copper bars, the copper bar line becomes complex, and the number of switching paths is large, which leads to an excessively large overall size of the power distribution device and a large occupied space. In addition, the number of screw fastening points between the copper bars increases, which increases the risk of copper bar connection failure. SUMMARY

[0004] The present application provides a power distribution device and a charging device comprising the same, which can improve the integration of the power distribution device and reduce the use of copper bars and the occupation of space in the power distribution device.

[0005] To achieve the above-mentioned purposes, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a power distribution device for distributing and outputting at least one input current. The power distribution device comprises a mounting seat, a busbar, and a switch matrix assembly. The busbar is fixed on the mounting seat and is used for inputting or outputting current. The switch matrix assembly comprises a housing, a first circuit board, switching devices, and a metal sheet. The housing is fixed on the mounting seat. The housing has an opening in communication with the internal space thereof, and the opening faces the mounting seat. The first circuit board is fixed in the housing. The switching devices are fixed on the first circuit board. The metal sheet is fixed on the board surface of the first circuit board facing the opening. The metal sheet is electrically connected to at least one of the switching devices. One of the busbars passes through the opening and is connected to the other busbar.

[0007] The plurality of switching devices (for example, relays or contactors) are integrated on the first circuit board, and the first circuit board is installed in the shell, which improves the integration of the switching matrix assembly, facilitates the overall installation and overall replacement of the switching matrix assembly, and reduces the assembly difficulty of the power distribution device. In addition, the switching devices on the first circuit board are electrically connected by the metal sheet on the first circuit board. Since the metal sheet is arranged towards the opening of the shell, when the switching matrix assembly is installed on the mounting seat, the metal sheet can be connected with the busbar. In this way, the current input or output through the busbar can be controlled by the corresponding switching device to achieve the distribution of the current. By arranging the first circuit board and the metal sheet, the electrical connection between the busbar and the corresponding switching device is realized, and the use of copper bars and the occupation of space in the power distribution device are reduced.

[0008] In an embodiment of the present application, the shell includes a protective cover, a frame, and a fastener. The protective cover is fixedly connected with the frame through the fastener. The protective cover and the frame enclose an internal space of the shell. The first circuit board is located between the protective cover and the frame. The opening is arranged on the frame.

[0009] The shell can be divided into a protective cover and a frame, which are connected and fixed by a fastener. When the first circuit board needs to be installed in the shell, the first circuit board can be installed between the protective cover and the frame which are separated from each other, and then the protective cover and the frame are fixed by the fastener, thereby reducing the installation difficulty of the first circuit board.

[0010] In an embodiment of the present application, the switching matrix assembly further includes a fan. The shell has an air inlet and an air outlet. The fan is arranged at the air inlet.

[0011] When the first circuit board and the electronic components (for example, switching devices) thereon need to be cooled, the fan can blow air into the air inlet. The air blown by the fan flows in the shell, taking away part of the heat of the first circuit board and the electronic components thereon, or the first circuit board and the electronic components thereon exchange heat with the air blown by the fan. Finally, the air blown into the shell is discharged from the air outlet, thereby cooling the first circuit board and the electronic components thereon.

[0012] In an embodiment of the present application, the internal space of the shell includes a first air duct and a second air duct located at different sides of the first circuit board. Each switching device includes a device shell and a pin fixed on the device shell. The device shell of each switching device is located in the first air duct. The pin of each switching device extends into the second air duct through the first circuit board. The metal sheet is located in the second air duct and connected with the pin of at least one switching device. The first air duct and the second air duct are both communicated with the air inlet and the air outlet.

[0013] When the first circuit board and the electronic components thereon are cooled, the wind blows through the first air duct and the second air duct to cool both sides of the first circuit board. For example, the device shell of the switching device is arranged on one side of the first circuit board, the pins of the switching device pass through the first circuit board and are electrically connected to the corresponding metal sheet, the device shell of the switching device is cooled in the first air duct, and the connection position of the pins of the switching device and the metal sheet is cooled in the second air duct, so that the cooling of the first circuit board is more comprehensive and efficient, and the possibility that the power distribution device cannot operate normally due to excessive temperature is reduced.

[0014] In an embodiment of the present application, the first air duct includes a wind gathering channel and a conventional channel, the cross-sectional area of the wind gathering channel is smaller than that of the conventional channel, at least part of the plurality of switching devices is located in the wind gathering channel, and at least one of the air inlet and the air outlet is arranged on the wall of the shell surrounding the conventional channel.

[0015] When the wind blown by the fan enters the first air duct, it passes through the wind gathering channel. Since the cross-sectional area of the wind gathering channel is smaller, the flow rate of the wind in the wind gathering channel is faster, and the wind can quickly take away the heat in the wind gathering channel. In the present application, at least part of the plurality of switching devices is arranged in the wind gathering channel. When the wind continuously and quickly flows through the wind gathering channel, the switching devices in the wind gathering channel can be efficiently cooled, reducing the possibility that the switching devices are affected by excessive heat and cannot operate normally. In addition, since the cross-sectional area of the conventional channel is larger, the wall of the shell surrounding the conventional channel has more area to arrange larger air inlets or outlets, so that the air inlet area or the air outlet area of the shell is larger, facilitating the flow of air into or out of the shell. In addition, the conventional channel also has more space to accommodate other electronic components on the first circuit board, thereby compensating for the reduction in internal space of the shell caused by the arrangement of the wind gathering channel, so that the internal space of the shell can meet the rapid flow of air and also does not affect the arrangement and placement of electronic components in the shell.

[0016] In an embodiment of the present application, the switching matrix assembly further includes a second circuit board, the second circuit board is located in the shell and is fixed perpendicularly to the first circuit board, the part of the shell forming the air inlet is located on one side of the second circuit board in the thickness direction of the second circuit board, the plurality of switching devices is located between the second circuit board and the air inlet, and the air outlet includes a first air outlet, the first air outlet is located between the second circuit board and the air inlet.

[0017] The second circuit board can be a control board, wherein the second circuit board is fixed vertically on the first circuit board, the second circuit board and the plurality of switching devices share a height space in the shell, the length and width of the shell are reduced, and the length and width of the overall switch matrix assembly are reduced, so that the space occupancy of the switch matrix assembly is lower. In addition, when the air blown by the fan enters the shell from the air inlet, the second circuit board blocks the flow of part of the air, and therefore, the first air outlet is arranged between the second circuit board and the air inlet, so that the air is discharged from the first air outlet after being blocked by the second circuit board, thereby reducing the influence of the second circuit board on the air exhaust of the shell.

[0018] In an embodiment of the present application, the air outlet further comprises a second air outlet, the part of the shell on the side of the second circuit board away from the air inlet is an end plate of the shell, and a part of the end plate blocks the second circuit board in the direction of the thickness of the first circuit board, and another part of the end plate is provided with the second air outlet.

[0019] In the case where the first air outlet is arranged, some air still flows around the second circuit board, and therefore, the second air outlet can be arranged on the end plate of the shell, the first air outlet and the second air outlet are both air outlets for discharging air in the shell, so that the heat dissipation in the shell is more comprehensive. In addition, the part of the end plate without the second air outlet blocks the second circuit board, and when the end plate faces upward after the shell is installed, the part of the end plate without the second air outlet can reduce the possibility of liquid falling on the second circuit board or the first circuit board from the outside, thereby better protecting the devices in the shell.

[0020] In an embodiment of the present application, the switch matrix assembly further comprises a connecting piece and a hook, the hook is fixed to the end of the fan facing the mounting seat, the hook extends into the shell through the air inlet and is hooked on the wall of the shell where the air inlet is arranged, and the end of the fan away from the mounting seat is fixed to the shell through the connecting piece.

[0021] When the fan needs to be installed, the hook of the fan can be extended into the shell and hooked on the shell, and then the fan can be fixed through the connecting piece; when the fan needs to be disassembled for maintenance, the connecting piece can be removed, and then the hooking connection between the fan and the shell can be released by simply moving. Through the arrangement of the hook and the connecting piece, the installation and disassembly steps of the fan can be simplified, and the fan can be quickly disassembled and assembled. In addition, since the connecting piece is located at the end of the fan away from the mounting seat, when the worker faces the switch matrix assembly, the worker can disassemble or install the connecting piece on the front of the switch matrix assembly.

[0022] In an embodiment of the present application, the power distribution device further comprises a screw, the screw passes through the shell, the first circuit board, the metal sheet and the busbar in sequence and is threadedly connected with the mounting seat, and the head of the screw abuts against the shell or the first circuit board.

[0023] The screw not only locks the connection between the switch matrix assembly and the mounting seat, but also presses the metal sheet on the first circuit board on the busbar, so that the switch matrix assembly is stably installed, and the possibility of poor contact between the metal sheet and the busbar is reduced. In addition, the head of the screw is arranged away from the mounting seat, which is beneficial to the worker to disassemble or install the screw on the front of the switch matrix assembly when the worker faces the switch matrix assembly.

[0024] In an embodiment of the present application, the shell has a through hole through which the screw passes, and the surface of the shell away from the first circuit board has a marking groove recessed toward the mounting seat, and the marking groove is in communication with the through hole.

[0025] When the screw is tightened, a marking line can be drawn on the groove bottom of the marking groove, and the drawn marking line can extend to the head of the screw, which serves as a reference. When the screw is loose, the marking line is no longer continuous, so that the worker can be reminded that the screw is abnormal, and the worker can be facilitated to maintain. In addition, the marking groove is recessed toward the mounting seat, so that the groove bottom of the marking groove is closer to the head of the screw, and the worker can be facilitated to draw a marking line on the marking groove and the head of the screw.

[0026] In an embodiment of the present application, the power distribution device further comprises a positioning column, one of the shell and the mounting seat is fixed with the positioning column, and the other comprises a positioning hole, and the positioning column is used for being inserted into the positioning hole.

[0027] When the switch matrix assembly is installed, the positioning column can be aligned with the corresponding positioning hole and inserted, and the cooperation between the positioning column and the positioning hole can not only serve as a positioning function, but also serve as a support function for the shell. For example, in the case that the positioning column protrudes in the horizontal direction, the positioning column can be regarded as a support structure, and the shell is supported through the abutting action of the positioning column and the inner wall surface of the positioning hole, so that the worker can accurately and easily connect the switch matrix assembly and the mounting seat.

[0028] In an embodiment of the present application, the positioning column or the positioning hole is located on the side wall of the shell provided with the opening.

[0029] The positioning column is hidden between the shell and the mounting seat, and the area of the mounting seat facing the shell and the side wall of the shell provided with the opening are fully utilized, so that the space occupied by the positioning column is reduced.

[0030] In a second aspect of the present application, a charging device is provided, which comprises a power conversion device, a plurality of charging interfaces, and the above-mentioned power distribution device. The busbar is electrically connected to the output end of the power conversion device and / or the input end of at least one charging interface.

[0031] The power distribution device can distribute the current from the power conversion device according to the requirements of the charging interfaces, and distribute the current output by the power conversion device to the corresponding one or more charging interfaces. The charging device provided by the present application comprises the power distribution device described above, and therefore the charging device provided by the present application can solve the same technical problems and has the same technical effects as the power distribution device of the above technical solution, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The overall structure schematic diagram of a charging device provided by an embodiment of the present application is shown in the figure.

[0033] Figure 2 The overall structure schematic diagram of another charging device provided by an embodiment of the present application is shown in the figure.

[0034] Figure 3 The overall structure schematic diagram of a power distribution device provided by an embodiment of the present application is shown in the figure.

[0035] Figure 4 The partial exploded structure schematic diagram of a power distribution device provided by an embodiment of the present application is shown in the figure.

[0036] Figure 5 The overall structure schematic diagram of a switch matrix assembly provided by an embodiment of the present application is shown in the figure.

[0037] Figure 6 The partial exploded structure schematic diagram of a switch matrix assembly provided by an embodiment of the present application is shown in the figure.

[0038] Figure 7 The sectional view of a power distribution device provided by an embodiment of the present application is shown in the figure.

[0039] Figure 8 The enlarged view of A in the figure. Figure 7

[0040] Figure 9 The structure schematic diagram of a marking groove provided by an embodiment of the present application is shown in the figure.

[0041] Figure 10 The structure schematic diagram of a fan provided by an embodiment of the present application is shown in the figure.

[0042] Figure 11 The structure schematic diagram of a second circuit board provided by an embodiment of the present application is shown in the figure.

[0043] Figure 12 The structure schematic diagram of an air outlet provided by an embodiment of the present application is shown in the figure.

[0044] Figure 13 The structure schematic diagram of a wind gathering channel provided by an embodiment of the present application is shown in the figure. ​

[0045] Figure 14 Another structure diagram of a wind gathering channel provided by an embodiment of the present application is shown in the figure.

[0046] Figure 15 A side view of a switch matrix assembly provided by an embodiment of the present application is shown in the figure.

[0047] Figure 16 A Figure 15 A cross-sectional view at A-A.

[0048] Figure 17 A Figure 15 A cross-sectional view at B-B.

[0049] Figure 18 A Figure 15 A cross-sectional view at C-C.

[0050] Reference signs:

[0051] 100 - charging device; 101 - device cabinet; 102 - charging gun; 103 - charging host; 104 - charging terminal; 105 - power conversion device; 106 - power distribution device; 107 - charging interface; 108 - cable;

[0052] 1 - mounting seat; 2 - busbar; 3 - switch matrix assembly; 31 - housing; 310 - opening; 311 - protective cover; 312 - frame; 313 - fastener; 314 - positioning hole; 3141 - first positioning hole; 3142 - second positioning hole; 3143 - third positioning hole; 3144 - fourth positioning hole; 315 - hanging ear; 316 - through hole; 317 - marking groove; 318 - air inlet; 319 - air outlet; 3191 - first air outlet; 3192 - second air outlet; 320 - end plate; 321 - first air duct; 3211 - wind gathering channel; 3212 - general channel; 322 - second air duct; 323 - protruding portion; 324 - recessed portion; 3241 - avoiding groove; 325 - support column; 32 - first circuit board; 33 - switching device; 331 - device shell; 332 - pin; 34 - metal sheet; 35 - fan; 351 - hook; 36 - second circuit board; 4 - screw; 5 - positioning column; 51 - first positioning column; 52 - second positioning column; 53 - third positioning column; 54 - fourth positioning column; 6 - fastening structure; 7 - connecting piece. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0054] In the present application, the terms "first", "second", etc. are used only for descriptive purposes, and are used to distinguish one element from another, and cannot be construed as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features.

[0055] In the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0056] In addition, in the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described as "exemplary" or "for example" in the present application should not be construed as being preferred or superior over other embodiments or designs. Rather, the use of "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0057] In the drawings of the embodiments of the present application, the entity structures of components, assemblies, etc. are represented by guide lines; the hollow structures of openings, holes, spaces, cavities, etc. are represented by guide lines with arrows.

[0058] The embodiments of the present application provide a charging device 100, which can be a charging pile, for example, an integrated charging pile, Figure 1 An exemplary structure of a charging device 100 (an integrated charging pile) is shown, referring to Figure 1 The charging device 100 includes a device cabinet 101 and at least one charging gun 102 (for example, Figure 1 The case of multiple charging guns 102 is shown, which can be plugged on the device cabinet 101 when the charging gun 102 is not performing charging operation, for personnel to take at any time.

[0059] For another example, the charging device 100 can also be a split charging pile, Figure 2 An exemplary structure of another charging device 100 (a split charging pile) is shown, referring to Figure 2 The charging device 100 includes a charging host 103, at least one charging terminal 104, and at least one charging gun 102. For example, Figure 2 The case of multiple charging terminals 104 and multiple charging guns 102 is shown, wherein each charging terminal 104 is electrically connected to the charging host 103, and each charging terminal 104 corresponds to one or more charging guns 102. When the charging gun 102 is not performing charging operation, the charging gun 102 can be plugged on the corresponding charging terminal 104, so that personnel can take the charging gun 102 from the charging terminal 104.

[0060] In addition, referring to Figure 1 and Figure 2The charging device 100 further comprises a power conversion device 105, a power distribution device 106 and a plurality of charging interfaces 107. For example, in the example that the charging device 100 is an integrated charging pile, referring to Figure 1 The power conversion device 105, the power distribution device 106 and the plurality of charging interfaces 107 can be all arranged in the device cabinet 101, and each charging interface 107 can be electrically connected with a corresponding charging gun 102 through a cable 108. For another example, in the example that the charging device 100 comprises a charging host 103 and at least one charging terminal 104, referring to Figure 2 The power conversion device 105 and the power distribution device 106 can be arranged in the charging host 103, and the charging interface 107 can be arranged in the terminal cabinet of the charging terminal 104, and each charging interface 107 is electrically connected with a corresponding charging gun 102 through a cable 108.

[0061] The input end of the power conversion device 105 is used to receive alternating current, and the output end of the power conversion device 105 is used to output direct current, for example, referring to Figure 1 and Figure 2 The power conversion device 105 can comprise a plurality of AC-DC modules and a plurality of DC-DC modules. The output end of the power conversion device 105 is electrically connected with the input end of the power distribution device 106, and the output end of the power distribution device 106 is electrically connected with the input end of the plurality of charging interfaces 107. The power distribution device 106 is used to distribute the direct current output by the power conversion device 105 to at least one charging interface 107, and make the output end of the charging interface 107 output direct current, so as to charge the device (for example, an electric vehicle) to be charged through the charging gun 102. In some other examples, the power conversion device 105 can comprise a plurality of AC-DC modules, and no DC-DC module is arranged.

[0062] It should be noted that, Figure 1 and Figure 2 The charging device 100 shown in the figures is only an example of the two charging devices 100 provided in the present application, and is not a limitation on the charging device 100 of the present application.

[0063] The present application provides a power distribution device 106, Figure 3 An example is shown to illustrate the structure of a power distribution device 106, wherein the power distribution device 106 is used to distribute the input current into at least one path and output, for example, the power distribution device 106 is used to distribute the current input by the power conversion device 105 into one path or multiple paths and output to the corresponding charging interface 107.

[0064] Figure 4 An example is shown to illustrate the partial exploded view of a power distribution device 106, referring to Figure 4The power distribution device 106 includes a mounting base 1, a busbar 2, and a switch matrix assembly 3. The busbar 2 can be a copper or aluminum busbar, and it is fixed to the mounting base 1 (e.g., by bolting, riveting, bonding, etc.) and used for current input or output. For example, the busbar 2 is electrically connected to the output terminal of the power conversion device 105 (which can be referred to as...). Figure 1 or Figure 2 For example, busbar 2 is electrically connected to the input terminal of one or more corresponding charging ports 107 (charging ports 107 can be referred to...). Figure 1 or Figure 2 For example, busbar 2 is electrically connected to the output of power conversion device 105 and the input of at least one charging interface 107. Furthermore, switch matrix assembly 3 is mounted on mounting base 1.

[0065] This application provides a switch matrix component 3. Figure 5 An exemplary switch matrix component 3 is shown. Figure 6 An exemplary partial exploded view of a switch matrix component 3 is shown, with reference to... Figure 5 and Figure 6 The switch matrix assembly 3 includes a housing 31, a first circuit board 32, a metal sheet 34, and multiple switching devices 33. Figure 6 Only two switching devices 33 are representatively labeled in the text. The housing 31 can be any suitable enclosure structure; for example, it can be a one-piece housing, or it can be a separate housing (e.g., Figure 6 (As shown in the illustration). The housing 31 has space inside for mounting devices or apparatus, and the housing 31 also has an opening 310 communicating with its own internal space. The size of the opening 310 can be set as needed. For example, the opening 310 can be a mounting port on the side wall of the housing 31, or, for another example, the opening 310 can be a port on one side of the housing 31 (in this example, the housing 31 can be understood as a protective cover covering the outside of the mounting base 1).

[0066] The first circuit board 32 is fixed inside the housing 31, for example, referring to Figure 6 The housing 31 has a support column 325 for mounting and fixing the first circuit board 32. For example, the first circuit board 32 is directly fixed to the inner wall of the housing 31. The first circuit board 32 can be a printed circuit board (PCB), and the metal sheet 34 and multiple switching devices 33 are all fixed on the first circuit board 32.

[0067] The metal sheet 34 can be a copper bar, a copper sheet, an aluminum bar, etc. The metal sheet 34 can be fixed on the first circuit board 32 by crimping, bonding, welding, etc. The switch device 33 can be any electronic component capable of controlling the on-off of the circuit. For example, the switch device 33 can be a relay. For another example, the switch device 33 can be a contactor. In addition, the plurality of switch devices 33 can be arranged on the first circuit board 32 in any suitable manner. For example, the plurality of switch devices 33 are arranged at intervals in the same direction (for example, as shown in the case in FIG. 3), for another example, the plurality of switch devices 33 are arranged in an array. Figure 6

[0068] In the example shown in FIG. 3, the metal sheet 34 and the plurality of switch devices 33 are fixed on different board surfaces of the first circuit board 32. In other examples, the metal sheet 34 and the plurality of switch devices 33 can also be fixed on the same board surface of the first circuit board 32. In addition, regardless of whether the metal sheet 34 and the plurality of switch devices 33 are on the same board surface, in order to facilitate the external circuit or the external busbar 2, the metal sheet 34 is fixed on the board surface of the first circuit board 32 facing the opening 310. Figure 5 Figure 6 In the example shown in FIG. 3, the metal sheet 34 and the plurality of switch devices 33 are fixed on different board surfaces of the first circuit board 32. In other examples, the metal sheet 34 and the plurality of switch devices 33 can also be fixed on the same board surface of the first circuit board 32. In addition, regardless of whether the metal sheet 34 and the plurality of switch devices 33 are on the same board surface, in order to facilitate the external circuit or the external busbar 2, the metal sheet 34 is fixed on the board surface of the first circuit board 32 facing the opening 310.

[0069] For example, one metal sheet 34 is electrically connected to one switch device 33, for another example, one metal sheet 34 is electrically connected to a plurality of switch devices 33, which is not specifically limited in the present application. The metal sheet 34 can be electrically connected to the switch device 33 in various ways. In one example provided by the present application, Figure 7 An example is shown in FIG. 3, which shows a cross-sectional view of the power distribution device 106. The metal sheet 34 and the plurality of switch devices 33 are fixed on different board surfaces of the first circuit board 32. Each switch device 33 includes a device shell 331 and a pin 332. The device shell 331 is provided with a contact structure (not shown in the figure) for breaking the current, etc. The pin 332 is fixed on the device shell 331. The pin 332 of each switch device 33 penetrates through the first circuit board 32 and is electrically connected to the corresponding metal sheet 34.

[0070] In the case of an integrated shell, the first circuit board 32 can be installed in the shell 31 through the opening 310. In the case of a split shell, the first circuit board 32 can be installed in the shell 31 by splitting the shell 31. For example, refer to Figure 5 Figure 6 ​​​The shell 31 can include a protective cover 311, a frame 312, and fasteners 313. The protective cover 311 is arranged outside the frame 312, and the opening 310 is arranged on the frame 312. The protective cover 311 and the frame 312 enclose an internal space of the shell 31. The first circuit board 32 is located between the protective cover 311 and the frame 312. The protective cover 311 and the frame 312 are fixedly connected by the fasteners 313. The fasteners 313 can be screws, bolts, rivets, adhesives, etc. The structure of the fasteners 313 is not limited in the present application. Some of the fasteners 313 are shown in the figure, and the others are hidden. Figure 6 The structure of the fasteners 313 is not limited in the present application. Some of the fasteners 313 are shown in the figure, and the others are hidden.

[0071] To facilitate disassembly and installation, at least some of the fasteners 313 can be arranged on the side of the protective cover 311 away from the frame 312, which is beneficial for the workers to disassemble or install the fasteners 313 from the front of the switch matrix assembly 3.

[0072] In the above example, the shell 31 is a split housing. When the first circuit board 32 needs to be installed in the shell 31, the first circuit board 32 can be installed between the protective cover 311 and the frame 312 which are separated from each other, and then the protective cover 311 and the frame 312 are fixed by the fasteners 313, so that the installation of the first circuit board 32 is realized, and the difficulty of installing the first circuit board 32 is reduced.

[0073] After the first circuit board 32 is installed in the shell 31, the switch matrix assembly 3 and the mounting seat 1 can be fixedly connected by fixing the shell 31 to the mounting seat 1. The shell 31 can be fixed to the mounting seat 1 by any suitable method, for example, the shell 31 can be fixed to the mounting seat 1 by bolts, screws, rivets, etc.

[0074] In some examples, referring back to Figure 4 and Figure 5 , the power distribution device 106 further includes at least one positioning column 5 Figure 4 and Figure 5 a plurality of positioning columns 5 are shown in the example), one of the shell 31 and the mounting seat 1 is fixed with the positioning column 5, and the other has a positioning hole 314. Each positioning column 5 is used to be inserted into the corresponding positioning hole 314.

[0075] When one positioning column 5 and one positioning hole 314 are provided, the positioning column 5 can be arranged on the mounting seat 1, and the corresponding positioning hole 314 can be arranged on the shell 31. Alternatively, the positioning column 5 can be arranged on the shell 31, and the corresponding positioning hole 314 can be arranged on the mounting seat 1. Referring back to Figure 4 and Figure 5In the case where multiple positioning columns 5 and multiple positioning holes 314 are provided, the multiple positioning columns 5 are fixed on the mounting seat 1, and the multiple positioning holes 314 are located on the shell 31. In some other examples, the multiple positioning columns 5 can be fixed on the shell 31, and the multiple positioning holes 314 can be located on the mounting seat 1. In some other examples, part of the positioning columns 5 can be fixed on the shell 31, and the positioning holes 314 corresponding to the part of the positioning columns 5 can be located on the mounting seat 1, and the other part of the positioning columns 5 can be fixed on the mounting seat 1, and the positioning holes 314 corresponding to the other part of the positioning columns 5 can be located on the shell 31.

[0076] When the switch matrix assembly 3 is installed, the positioning columns 5 can be aligned with the corresponding positioning holes 314 and inserted. The cooperation between the positioning columns 5 and the positioning holes 314 can not only play a positioning role, but also play a role in supporting the shell 31. For example, when the switch matrix assembly 3 is installed along the vertical direction of Figure 4 and Figure 5 , the positioning columns 5 protrude along the horizontal direction, and the protruding positioning columns 5 can be regarded as a support structure. Through the abutting action of the positioning columns 5 and the inner wall surface of the positioning holes 314, the shell 31 is supported, which facilitates the accurate and easy connection of the switch matrix assembly 3 and the mounting seat 1 by the worker.

[0077] Referring to Figure 4 and Figure 5 , in the case where multiple positioning columns 5 and multiple positioning holes 314 are provided, one of the multiple positioning columns 5 (a first positioning column 51) can be fixed on the top of the mounting seat 1, and the positioning hole 314 (a first positioning hole 3141) corresponding to the first positioning column 51 is located on the top of the shell 31, for example, the first positioning hole 3141 is located on the lug 315 of the shell 31 (the lug 315 is part of the shell 31, and the lug 315 can be connected to other parts of the shell 31 by bolts). Another positioning column 5 (a second positioning column 52) of the multiple positioning columns 5 can be fixed on the bottom of the mounting seat 1, and the positioning hole 314 (a second positioning hole 3142) corresponding to the second positioning column 52 is located on the bottom of the shell 31. In addition, the first positioning column 51 and the second positioning column 52 are each provided with a fastening structure 6 (for example, a screw, a bolt, a rivet, etc.) on the side, and the fastening structure 6 is used to fix the shell 31 and the mounting seat 1 after the positioning column 5 is inserted into the corresponding positioning hole 314. In addition, the fastening structure 6 can be arranged at a position that is beneficial for the worker to remove or install according to actual needs.

[0078] In some examples, referring to Figure 4 and Figure 5, some of the plurality of positioning holes 314 (for example, the third positioning hole 3143 and the fourth positioning hole 3144) can be located on the side wall (side wall C1) of the housing 31 where the opening 310 is provided. The positioning post 5 corresponding to the third positioning hole 3143 (third positioning post 53) and the positioning post 5 corresponding to the fourth positioning hole 3144 (fourth positioning post 54) are both fixed on the mounting seat 1. By hiding this part of the positioning posts 5 (third positioning post 53 and fourth positioning post 54) between the housing 31 and the mounting seat 1, the area of the mounting seat 1 towards the housing 31 and the side wall of the housing 31 where the opening 310 is provided are fully utilized, which not only plays a role in installation positioning, but also reduces the space occupied by the positioning posts 5, and also makes the product more beautiful.

[0079] In the example where the housing 31 includes the protective cover 311 and the frame 312, referring to Figure 6 , the positioning holes 314 on the side wall (side wall C1) of the housing 31 where the opening 310 is provided can be located on the frame 312, for example, the third positioning hole 3143 and the fourth positioning hole 3144 can be located on the frame 312.

[0080] It can be understood that the cooperation of the housing 31 and the mounting seat 1 through the plurality of positioning posts 5 and the corresponding positioning holes 314 can make the installation position of the housing 31 more accurate, but in some examples, the housing 31 and the mounting seat 1 can also be positioned only through one positioning post 5 and the corresponding positioning hole 314. The positioning post 5 can be provided at any suitable position of the housing 31, and the positioning post 5 can also be provided at any suitable position of the mounting seat 1.

[0081] In addition, the above-mentioned positioning holes 314 can be through holes 316 (holes of the through type) or blind holes (holes of the non-through type).

[0082] After the switch matrix assembly 3 is fixed on the mounting seat 1, the opening 310 of the housing 31 is arranged towards the mounting seat 1, Figure 7 embodies the state that the switch matrix assembly 3 is fixed on the mounting seat 1. Among them, Figure 8 is Figure 7 is an enlarged view of A in FIG. 12, referring to Figure 7 and Figure 8 , the opening 310 is arranged towards the mounting seat 1, that is, the metal sheet 34 on the first circuit board 32 is arranged towards the mounting seat 1, the busbar 2 is exposed on the side of the mounting seat 1 towards the housing 31, after the switch matrix assembly 3 is fixed on the mounting seat 1, the metal sheet 34 and one of the busbars 2 pass through the opening 310 and connect with the other (fixed with each other or contact with each other). For example, in Figure 7 and Figure 8In the shown example, the busbar 2 is connected with the metal sheet 34 inside the housing 31 through the opening 310. In other examples, the metal sheet 34 can also extend out of the housing 31 through the opening 310 and be connected with the busbar 2 outside the housing 31.

[0083] For example, the power conversion device 105 includes multiple power modules, the busbar 2(a) is electrically connected with the output of one power module (a) of the power conversion device 105, and the busbar 2(a) is also electrically connected with the input of the charging interface 107(a) corresponding to the power module (a), the current output by the power module (a) can be directly delivered to the corresponding charging interface 107(a) through the busbar 2(a), when other charging interfaces 107(b) need to call the current of the power module (a), the current of the power module (a) can be delivered to the metal sheet 34 corresponding to the busbar 2(a) through the busbar 2(a), then flow through the switch device 33 electrically connected with the metal sheet 34, and the current is distributed to other busbars 2(b) through the switch device 33, the busbar 2(b) is electrically connected with the charging interface 107(b), so as to realize the distribution of the current of the power module (a) to the charging interface 107(b).

[0084] In some other examples, the output of the power conversion device 105 is connected with multiple busbars 8(c), the input of each charging interface 107 is connected with a busbar 8(d), the multiple busbars 8(c) are respectively connected with corresponding metal sheets 34, the multiple busbars 8(d) are respectively connected with corresponding metal sheets 34, and the metal sheets 34 connected with the multiple busbars 8(c) are different from the metal sheets 34 connected with any busbar 8(d). That is, the multiple busbars 8(c) connected with the output of the power conversion device 105 are not directly connected or contacted with the busbar 8(d) connected with the input of any charging interface 107, so that the current output from the power conversion device 105 needs to pass through the power distribution device 106 before being delivered to the specified charging interface 107.

[0085] This application integrates multiple switching devices 33 onto a first circuit board 32 and mounts the first circuit board 32 inside a housing 31, improving the integration of the switch matrix assembly 3 and facilitating its overall installation and replacement, thus reducing the assembly difficulty of the power distribution device 106. Furthermore, the switching devices 33 on the first circuit board 32 are electrically connected via a metal plate 34. Since the metal plate 34 faces the opening 310 of the housing 31, when the switch matrix assembly 3 is mounted on the mounting base 1, the metal plate 34 can be connected to the busbar 2. This allows the current input or output through the busbar 2 to be controlled by the corresponding switching device 33, enabling the power distribution device 106 to distribute the current. By using the first circuit board 32 and the metal plate 34, the electrical connection between the busbar 2 and the corresponding switching device 33 is achieved, reducing the use of copper busbars and the space occupied in the switch matrix assembly 3.

[0086] In some examples, refer to Figure 8 The power distribution device 106 also includes a screw 4, which can be a screw head, bolt, etc. The screw 4 passes sequentially through the housing 31, the first circuit board 32, the metal plate 34, and the busbar 2, and is threadedly connected to the mounting base 1. Figure 8 In the example shown, the housing 31 has a through hole 316, the diameter of which is larger than the diameter of the screw head 4. The screw head 4 is located within the through hole 316 and abuts against the first circuit board 32. In other examples, the diameter of the through hole 316 is smaller than the diameter of the screw head 4, and in such examples, the screw head 4 may also abut against the housing 31.

[0087] In some examples, multiple screws 4, metal plates 34, and busbars 2 can be provided. Multiple screws 4 pass through the housing 31 and the first circuit board 32, and each screw 4 passes through a corresponding metal plate 34 and a corresponding busbar 2 before being threaded into the mounting base 1. In other examples, multiple screws 4, metal plates 34, and busbars 2 can be provided, and multiple screws 4 pass through the housing 31 and the first circuit board 32; however, only one or some of the screws 4 pass through the corresponding metal plate 34 and the corresponding busbar 2 before being threaded into the mounting base 1.

[0088] The screw 4 not only secures the connection between the switch matrix assembly 3 and the mounting base 1, but also presses the metal plate 34 on the first circuit board 32 firmly onto the busbar 2. This ensures stable installation of the switch matrix assembly 3 and reduces the possibility of poor contact between the metal plate 34 and the busbar 2. Furthermore, the head of the screw 4 is positioned away from the mounting base 1, making it easier for workers to remove or install the screw 4 from the front of the switch matrix assembly 3.

[0089] Furthermore, in some instances, the surface of housing 31 has marking grooves 317. Figure 9 An exemplary structure of a marking groove 317 is shown, with reference to Figure 8 and Figure 9 The marking groove 317 is located on the surface of the housing 31 facing away from the first circuit board 32. The marking groove 317 is recessed towards the mounting base 1. It can be understood that the bottom surface (surface C2) of the marking groove 317 is lower than the surface (surface C3) of the housing 31 where the marking groove 317 is located, or in other words, the bottom surface of the marking groove 317 is closer to the mounting base 1. The marking groove 317 communicates with the through hole 316, for example... Figure 9 An example is shown where the housing 31 has multiple through holes 316. In this example, multiple marking slots 317 may also be provided, with each through hole 316 communicating with one marking slot 317. In other examples, one marking slot 317 may communicate with multiple through holes 316.

[0090] The marking groove 317 is recessed towards the mounting base 1, making the bottom surface of the marking groove 317 closer to the head of the screw 4. When the screw 4 is tightened, a marking line can be drawn on the bottom surface of the marking groove 317, and the marked line can extend to the head of the screw 4 for reference. When the screw 4 is loose, the marking line will no longer be continuous, which can remind the staff that the screw 4 is in an abnormal condition, making it easier for the staff to judge the condition of the screw 4 and facilitate timely repair.

[0091] Reference Figure 9 In some instances, the switch matrix assembly 3 also includes a fan 35. The housing 31 has an air inlet 318 and an air outlet 319, with the fan 35 positioned at the air inlet 318. Air blown by the fan 35 into the air inlet 318 flows within the housing 31, carrying away some of the heat from the first circuit board 32 and its electronic components (e.g., the switch device 33). Alternatively, the first circuit board 32 and its electronic components exchange heat with the air blown in by the fan 35. Finally, the air blown into the housing 31 is exhausted from the air outlet 319, thus achieving heat dissipation for the first circuit board 32 and its electronic components.

[0092] The fan 35 can be mounted on the housing 31 in any suitable manner. Furthermore, the fan 35 can be located inside the housing 31, or it can be located outside the housing 31. Alternatively, part of the fan 35 can be located inside the housing 31 and the other part can be located outside the housing 31.

[0093] Figure 10 An example is shown Figure 9 The situation where the fan 35 is removed from the housing 31. Figure 10 Arrow 1 in the image indicates the location of mounting base 1. (Refer to...) Figure 9 and Figure 10The switch matrix assembly 3 further comprises a hook 351 fixed (e.g., integrally connected) to the end of the fan 35 facing the mounting base 1, the hook 351 extends into the housing 31 through the air inlet 318 and hooks on the wall (wall C4) of the housing 31 where the air inlet 318 is arranged. The end of the fan 35 away from the mounting base 1 is fixed to the housing 31, for example, the switch matrix assembly 3 further comprises a connecting piece 7, which can be a screw, a bolt, a pin, etc., the end of the fan 35 away from the mounting base 1 is fixed to the housing 31 through the connecting piece 7.

[0094] Through the above design, when the fan 35 needs to be installed, the hook 351 of the fan 35 can be extended into the housing 31 and hooked on the housing 31, and then the fan 35 is fixed through the connecting piece 7. When the fan 35 needs to be disassembled for maintenance, the connecting piece 7 can be disassembled, and then the hooking connection between the fan 35 and the housing 31 can be released by simply moving. Through the arrangement of the hook 351 and the connecting piece 7, the installation and disassembly steps of the fan 35 can be simplified, and the fan 35 can be quickly disassembled and assembled. In addition, since the connecting piece 7 is located at the end of the fan 35 away from the mounting base 1, when the worker faces the switch matrix assembly 3, it is convenient for the worker to disassemble or install the connecting piece 7 from the front of the switch matrix assembly 3.

[0095] The air inlet 318 and the air outlet 319 can be arranged at any suitable position, for example, the air inlet 318 is arranged at the bottom of the housing 31, and the air outlet 319 is arranged at the top of the housing 31. The plurality of switch devices 33 are arranged between the air inlet 318 and the air outlet 319, so that the plurality of switch devices 33 can be fully cooled.

[0096] In some examples, the switch matrix assembly 3 further comprises a second circuit board 36, Figure 11 The structure of the second circuit board 36 is shown in the example (cross-sectional view), wherein the second circuit board 36 can be a control board, and the second circuit board 36 is fixed vertically on the first circuit board 32. The above-mentioned "vertical" is not limited to the absolute vertical intersection (the included angle is 90°) relationship, and allows the relationship that is not the absolute vertical intersection due to factors such as assembly tolerance, design tolerance, and structure flatness, that is, a certain range of errors, for example, the included angle is in the range of 70° to 110° within the assembly error range, which can be understood as a vertical relationship. The second circuit board 36 is fixed vertically on the first circuit board 32, the second circuit board 36 and the plurality of switch devices 33 share the height space in the housing 31, which reduces the length and width of the housing 31, and also reduces the length and width of the switch matrix assembly 3 as a whole, so that the space occupancy rate of the switch matrix assembly 3 is lower.

[0097] The second circuit board 36 can be arranged on one side of the first circuit board 32 Figure 11In the case shown, the second circuit board 36 can also be disposed at one end of the first circuit board 32 and extend toward both sides in the thickness direction of the first circuit board 32 itself.

[0098] In the case where the second circuit board 36 is disposed on the first circuit board 32, the air inlet 318 is located on one side of the second circuit board 36 in the thickness direction of the second circuit board 36 itself (for example, the air inlet 318 is located below the surface of the second circuit board 36), and the plurality of switching devices 33 are located between the second circuit board 36 and the air inlet 318. Figure 12 An example shows a structure of an air outlet 319, wherein the air outlet 319 includes a first air outlet 3191 located between the second circuit board 36 and the air inlet 318. When the wind blown by the fan 35 blows in from the air inlet 318, the second circuit board 36 will block part of the flow of the wind, so the first air outlet 3191 is disposed between the second circuit board 36 and the air inlet 318, which can make the wind flow out of the first air outlet 3191 after being blocked by the second circuit board 36, reducing the possibility that the second circuit board 36 hinders the wind in the housing 31 from flowing out. The first air outlet 3191 can include a plurality of air holes for ventilation.

[0099] Regarding the position of the first air outlet 3191, in some examples, with reference to Figure 12 , the air inlet 318 and the air outlet 319 are distributed along a first direction (the first direction is also the thickness direction of the second circuit board 36 in Figure 12 ), the housing 31 and the mounting base 1 are distributed along a second direction (the second direction is also the thickness direction of the first circuit board 32 in Figure 12 ), the first direction is perpendicular to the second direction, and the first air outlet 3191 is disposed on both side walls (side wall C5) of the housing 31 distributed in a third direction, and the first direction and the second direction are both perpendicular to the third direction. In other examples, the first air outlet 3191 can also be disposed on the wall of the housing 31 facing away from the first circuit board 32, which is not limited in the present application.

[0100] In addition, with reference to Figure 11 , the air outlet 319 can also include a second air outlet 3192, the part of the housing 31 located on the side of the second circuit board 36 facing away from the air inlet 318 is an end plate 320 of the housing 31, a part (C6 area) of the end plate 320 blocks the second circuit board 36, and the other part of the end plate 320 is provided with the second air outlet 3192. For example, in Figure 11 and Figure 12In the illustrated example, the second circuit board 36 is fixed on the board surface of the first circuit board 32 facing the switch device 33, the end plate 320 covers the second circuit board 36 on the portion (C6 area) of the first circuit board 32 facing the second circuit board 36, and the second air outlet 3192 is arranged on the portion of the first circuit board 32 away from the second circuit board 36. The second air outlet 3192 can include a plurality of air holes for ventilation.

[0101] In the case where the first air outlet 3191 is arranged, some air still flows around the second circuit board 36, and therefore the second air outlet 3192 can be arranged on the end plate 320 of the housing 31. The first air outlet 3191 and the second air outlet 3192 are both part of the air outlet 319 for discharging air in the housing 31, which can make the heat dissipation in the housing 31 more comprehensive.

[0102] The portion (C6 area) of the end plate 320 not provided with the second air outlet 3192 can cover the second circuit board 36. When the end plate 320 faces upward after the housing 31 is installed, the portion of the end plate 320 not provided with the second air outlet 3192 can reduce the possibility of liquid from outside falling on the second circuit board 36 or the first circuit board 32, thereby providing better protection for the devices in the housing 31. It should be noted that the portion of the end plate 320 covering the second circuit board 36 is not provided with the second air outlet 3192, but if there is a design requirement, this portion can be provided with other hole structures, such as a cable hole for the cable 108, and the present application does not specifically limit this.

[0103] In addition, in some examples, the air outlet 319 can further include a third air outlet arranged on the side of the second circuit board 36 away from the air inlet 318 and close to the second air outlet 3192. The air outlet 319 can further include a fourth air outlet and a fifth air outlet arranged at other positions of the housing 31.

[0104] After the air blown by the fan 35 enters the housing 31 from the air inlet 318, the air enters different air ducts in the housing 31, for example, referring to Figure 11The inner space of the shell 31 includes a first air duct 321 and a second air duct 322 located at different sides of the first circuit board 32, the device shell 331 of each switch device 33 is located in the first air duct 321, the pin 332 of each switch device 33 extends through the first circuit board 32 into the second air duct 322, the metal sheet 34 is located in the second air duct 322 and connected to the pin 332 of the corresponding switch device 33, and the first air duct 321 and the second air duct 322 are both communicated with the air inlet 318 and the air outlet 319. When the fan 35 operates, the wind blown by the fan 35 will be blown into the first air duct 321 and the second air duct 322 through the air inlet 318, so as to dissipate heat for both sides of the first circuit board 32. For example, the device shell 331 of the switch device 33 is arranged at one side of the first circuit board 32, the pin 332 of the switch device 33 is electrically connected to the metal sheet 34 through the first circuit board 32, the device shell 331 of the switch device 33 is cooled in the first air duct 321, and the connection position of the pin 332 of the switch device 33 and the metal sheet 34 is cooled in the second air duct 322, so that the heat dissipation of the first circuit board 32 is more comprehensive and efficient, and the possibility that the power distribution device 106 cannot operate normally due to excessive temperature is reduced.

[0105] The structure of the first air duct 321 can be changed as needed, for example, refer to Figure 12 In some examples, the first air duct 321 includes a wind gathering channel 3211 and a conventional channel 3212 communicated, wherein the cross-sectional area of the wind gathering channel 3211 is smaller than that of the conventional channel 3212, at least part (all or part of the switch devices 33) of the plurality of switch devices 33 is located in the wind gathering channel 3211, and at least one of the air inlet 318 and the air outlet 319 is arranged on the wall of the shell 31 surrounding the conventional channel 3212. In Figure 12 The example shown is provided with two conventional channels 3212, the wind gathering channel 3211 is located between the two conventional channels 3212, the air inlet 318 is arranged on the wall of the shell 31 surrounding one of the conventional channels 3212, and the air outlet 319 is arranged on the wall of the shell 31 surrounding the other conventional channel 3212.

[0106] The formation of the wind gathering channel 3211 can also have various forms, Figure 13 An example shows a structure of a wind gathering channel 3211, which can be formed by Figure 13 The structure shown can be understood as Figure 12 a simplification of the structure in Figure 12 and Figure 13 The two side walls (two side walls C5) of the shell 31 distributed in the third direction both have a convex portion 323 and a concave portion 324, and in the third direction, the concave portion 324 is closer to the plurality of switch devices 33 than the convex portion 323. Figure 13The air gathering passage 3211 is located between the two recessed portions 324. In this example, the air gathering passage 3211 is located between the two recessed portions 324.

[0107] In some examples, the auxiliary reference Figure 12 In order to avoid the screw 4, the recessed portion 324 can also be provided with a plurality of avoidance grooves 3241, so as to further reduce the space size of the air gathering passage 3211.

[0108] Figure 14 Another structure of the air gathering passage 3211 is shown in the example, referring to Figure 14 The air gathering passage 3211 and the conventional passage 3212 are each provided with one, and the two side walls (two side walls C5) of the shell 31 distributed in the third direction each have a convex portion 323 and a recessed portion 324. In the third direction, the recessed portion 324 is closer to the plurality of switch devices 33 Figure 14 The air gathering passage 3211 is located between the two recessed portions 324. In this example, the air inlet 318 can be provided on the wall of the shell 31 surrounding the air gathering passage 3211, and the air outlet 319 can be provided on the wall of the shell 31 surrounding the conventional passage 3212.

[0109] In other examples, one of the two side walls (two side walls C5) of the shell 31 distributed in the third direction has a convex portion 323 and a recessed portion 324, and the other side wall does not have a recessed structure.

[0110] By providing the air gathering passage 3211, the flow rate of the air can be improved. When the air blown by the fan 35 enters the first air duct 321, it will pass through the air gathering passage 3211. Since the cross-sectional area of the air gathering passage 3211 is small, the flow rate of the air is faster, and the air can quickly take away the heat in the air gathering passage 3211. By arranging at least part of the plurality of switch devices 33 in the air gathering passage 3211, when the air continuously and quickly flows through the air gathering passage 3211, the switch devices 33 in the air gathering passage 3211 can be efficiently cooled, reducing the possibility that the switch devices 33 are seriously heated and affect their normal operation.

[0111] Furthermore, because the conventional channel 3212 has a larger cross-sectional area, the wall of the housing 31 surrounding the conventional channel 3212 has more area to accommodate larger air inlets 318 or outlets 319, thus increasing the air intake or exhaust area of ​​the housing 31. This facilitates airflow into and out of the housing 31. Additionally, the conventional channel 3212 provides more space for other electronic components located on the first circuit board 32, compensating for the reduced internal space of the housing 31 caused by the air-gathering channel 3211. This ensures that the internal space of the housing 31 can accommodate rapid airflow without affecting the arrangement and placement of electronic components within the housing 31.

[0112] Regarding the determination of the size of the cross-sectional area of ​​the air-concentrating channel 3211 and the cross-sectional area of ​​the conventional channel 3212, the cross-sections of the air-concentrating channel 3211 and the conventional channel 3212 must be parallel to each other. Furthermore, both the cross-sections of the air-concentrating channel 3211 and the conventional channel 3212 are parallel to the thickness direction of the first circuit board 32, and both are perpendicular to their distribution direction. In the example where the second circuit board 36 is provided, the cross-sections of the air-concentrating channel 3211 and the conventional channel 3212 are perpendicular to the thickness direction of the second circuit board 36.

[0113] For example, Figure 15 A side view of a switch matrix component 3 is shown. Figure 16 for Figure 15 Cross-sectional view at point AA. Figure 16 The shaded area (M1) in the middle grid is a cross-section of one of the regular channels 3212. Figure 17 for Figure 15 Cross-sectional view at point BB. Figure 17 The shaded area in the middle grid (M2) is the cross-section of the air-gathering channel 3211; Figure 18 for Figure 15 Cross-sectional view at point C. Figure 18 The shaded area in the middle grid (M3) is a cross-section of another regular channel 3212. Among them, through... Figure 16 and Figure 17 Comparison, and Figure 17 and Figure 18 By comparison, it can be clearly seen that the cross-sectional area of ​​both conventional channels 3212 is larger than that of the wind-gathering channel 3211.

[0114] Due to the production and processing of the shell 31, the cross-sectional area of the wind gathering channel 3211 at different positions can not be equal, in which case, when compared with the cross-sectional area of the regular channel 3212, the maximum value of the cross-sectional area of the wind gathering channel 3211 can be taken. When the cross-sectional area of the regular channel 3212 at different positions is not equal, when compared with the cross-sectional area of the wind gathering channel 3211, the minimum value of the cross-sectional area of the regular channel 3212 can be taken.

[0115] In other examples, the shell 31 can also be a cover outside the mounting base 1, and the first circuit board 32 can be fixed on the mounting base 1 first, and then the shell 31 is installed, that is, after the first circuit board 32 is fixed with the mounting base 1, the shell 31 is covered outside the first circuit board 32. The application does not specifically limit the installation sequence of the shell 31, the first circuit board 32 and the like.

[0116] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A power distribution device for distributing an input current into at least one path and outputting, characterized by, The power distribution device comprises a mounting seat, busbars fixed on the mounting seat for current input or output, and a switch matrix assembly comprising: a housing fixed on the mounting seat, the housing having an opening in communication with an internal space thereof, the opening facing the mounting seat; a first circuit board fixed in the housing; a plurality of switch devices for controlling on-off, the plurality of switch devices being fixed on the first circuit board; a metal sheet fixed on a board surface of the first circuit board facing the opening, the metal sheet being electrically connected to at least one of the plurality of switch devices, the metal sheet passing through the opening and being connected to one of the busbars.

2. The power distribution apparatus of claim 1, wherein, The housing comprises a shield, a frame and fasteners, the shield being fixedly connected with the frame by the fasteners, the shield and the frame enclosing the internal space of the housing, the first circuit board being located between the shield and the frame, and the opening being provided on the frame.

3. The power distribution apparatus of claim 1, wherein, The switch matrix assembly further comprises a fan, the housing having an air inlet and an air outlet, and the fan being provided at the air inlet.

4. The power distribution apparatus of claim 3, wherein, The internal space of the housing comprises a first air duct and a second air duct located at different sides of the first circuit board, each of the switch devices comprises a device shell and a pin fixed on the device shell, the device shell of each of the switch devices being located in the first air duct, the pin of each of the switch devices extending into the second air duct through the first circuit board, the metal sheet being located in the second air duct and connected to the pin of at least one of the switch devices, and the first air duct and the second air duct being in communication with the air inlet and the air outlet.

5. The power distribution apparatus of claim 4, wherein, The first air duct comprises a wind collecting channel and a regular channel in communication, a cross-sectional area of the wind collecting channel being smaller than that of the regular channel, at least part of the plurality of switch devices being located in the wind collecting channel, and at least one of the air inlet and the air outlet being provided on a wall of the housing enclosing the regular channel.

6. The power distribution apparatus of claim 3, wherein, The switch matrix assembly further comprises a second circuit board fixed perpendicularly on the first circuit board, a portion of the housing forming the air inlet being located on one side of the second circuit board in a thickness direction thereof, the plurality of switch devices being located between the second circuit board and the air inlet, and the air outlet comprising a first air outlet located between the second circuit board and the air inlet.

7. The power distribution apparatus of claim 6, wherein, The air outlet further comprises a second air outlet, a portion of the housing located on a side of the second circuit board away from the air inlet being an end plate of the housing, a portion of the end plate shielding the second circuit board in the thickness direction of the first circuit board, and another portion of the end plate providing the second air outlet.

8. The power distribution apparatus of claim 3, wherein, The switch matrix assembly further comprises a connecting piece and a hook, the hook is fixed at the end of the fan facing the mounting base, the hook extends into the shell through the air inlet, and is hooked on the wall of the shell provided with the air inlet, and the end of the fan away from the mounting base is fixed with the shell through the connecting piece.

9. The power distribution apparatus of claim 1, wherein, The power distribution device further comprises a screw, the screw passes through the shell, the first circuit board, the metal sheet and the busbar in sequence and is threadedly connected with the mounting base, and the head of the screw abuts against the shell or the first circuit board.

10. The power distribution apparatus of claim 9, wherein, The shell has a through hole through which the screw passes, and a marking groove is formed on the surface of the shell away from the first circuit board, the marking groove is recessed towards the mounting base, and the marking groove is communicated with the through hole.

11. The power distribution apparatus of any one of claims 1-10, wherein, The power distribution device further comprises a positioning column, one of the shell and the mounting base is fixed with the positioning column, and the other comprises a positioning hole, and the positioning column is used for being inserted into the positioning hole.

12. The power distribution apparatus of claim 11, wherein, The positioning column or the positioning hole is located on the side wall of the shell provided with the opening.

13. A charging device, characterized by The power distribution device comprises a power conversion device, a plurality of charging interfaces, and the power distribution device of any one of claims 1-12, and the busbar is electrically connected with the output end of the power conversion device and / or the input end of at least one of the charging interfaces.

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