Power distribution device and charging equipment

Abstract

The embodiment of the invention provides a power distribution device and charging equipment 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 the 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 used for current input or output, and the switch matrix assembly is fixed on the busbar. The switch matrix assembly comprises a shell, a first circuit board, a switch device and a metal sheet, the shell is fixed on the mounting seat, the shell is provided with an opening communicated with the internal space of the shell, and the opening faces the mounting seat; the first circuit board is fixed in the shell; the plurality of switching devices are fixed on the first circuit board; the metal sheet is fixed on the plate surface, facing the opening, of the first circuit board, the metal sheet is electrically connected with at least one of the switching devices, and one of the metal sheet and the busbar penetrates through the opening and is connected with the other one.

Description

Technical Field

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

[0002] In a charging station, it is usually necessary to distribute the current output by the power module to the corresponding charging interface through a power distribution device. The connection method between the power module and the power distribution device, as well as the connection method within the power distribution device itself, mainly relies on copper busbars for transfer.

[0003] In the prior art, the switching devices (for example, relays) of the power distribution device are usually placed separately. After being transferred through multiple copper busbars, the copper busbar circuit will be complicated and the number of transfer paths will be large, resulting in the overall size of the power distribution device being too large and occupying more space. It will also increase the number of screw fastening points between the copper busbars, increasing the risk of copper busbar connection failure. Summary of the invention

[0004] The present application provides a power distribution device and a charging device including the power distribution device, which can improve the integration of the power distribution device and reduce the use of copper busbars and the space occupied by the power distribution device.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect of the present application, a power distribution device is provided for distributing an input current into at least one path and outputting the same. The power distribution device comprises a mounting base, a busbar and a switch matrix assembly. The busbar is fixed on the mounting base and is used for current input or output. The switch matrix assembly comprises a shell, a first circuit board, a switch device and a metal sheet. The shell is fixed on the mounting base, and the shell has an opening connected to its own internal space, and the opening faces the mounting base; the first circuit board is fixed in the shell; a plurality of switch 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 plurality of switch devices, and the metal sheet passes through the opening with one of the busbars and is connected to the other.

[0007] Integrating multiple switch devices (for example, relays or contactors) on the first circuit board and installing the first circuit board in the housing improves the integration of the switch matrix assembly, facilitates the overall installation and replacement of the switch matrix assembly, and reduces the difficulty of assembling the power distribution device. In addition, the switch devices on the first circuit board are electrically connected through the metal sheet on the first circuit board. Since the metal sheet is arranged toward the opening of the housing, when the switch matrix assembly is installed on the mounting seat, the connection between the metal sheet and the busbar can be achieved. In this way, the current input or output through the busbar can be controlled by the corresponding switch device to achieve the distribution of the current. By setting the first circuit board and the metal sheet, the electrical connection between the busbar and the corresponding switch device is achieved, reducing the use of copper bars and the occupation of space in the power distribution device.

[0008] In one embodiment of the present application, the shell includes a protective cover, a frame and fasteners. The protective cover and the frame are fixedly connected by fasteners. 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, and the opening is set on the frame.

[0009] The shell can be set to a split type. For example, the shell can be divided into a protective cover and a frame, and the two are connected and fixed by fasteners. 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 that are separated from each other, and then the protective cover and the frame are fixed by fasteners, which reduces the difficulty of installing the first circuit board.

[0010] In one embodiment of the present application, the switch matrix assembly further includes a fan, the housing has an air inlet and an air outlet, and the fan is disposed at the air inlet.

[0011] When the first circuit board and the electronic components thereon (for example, switching devices) need to be cooled, air can be blown into the air inlet through a fan. The air blown in by the fan will flow in the shell, taking away part of the heat of the first circuit board and the electronic components thereon. In other words, the first circuit board and the electronic components thereon will exchange heat with the air blown in by the fan. Finally, the air blown into the shell will be discharged from the air outlet, thereby achieving heat dissipation of the first circuit board and the electronic components thereon.

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

[0013] When the first circuit board and the electronic components thereon are cooled, the wind will blow through the first air duct and the second air duct, thereby cooling both sides of the first circuit board. For example, the device shell of the switch device is arranged on one side of the first circuit board, the pins of the switch device pass through the first circuit board and are electrically connected to the corresponding metal sheet, the device shell of the switch device is cooled in the first air duct, and the connection position between the pins of the switch device and the metal sheet is cooled in the second air duct, so that the heat dissipation of the first circuit board is more comprehensive and efficient, and the possibility of the power distribution device being unable to operate normally due to excessive temperature is reduced.

[0014] In one embodiment of the present application, the first air duct includes a connected wind gathering channel and a conventional channel, the cross-sectional area of ​​the wind gathering channel is smaller than the cross-sectional area of ​​the conventional channel, at least part of the multiple switching devices are 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 that surrounds the conventional channel.

[0015] When the wind blown out by the fan enters the first air duct, it will pass through the wind gathering channel. Since the cross-sectional area of ​​the wind gathering channel is small, 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 multiple switch devices are arranged in the wind gathering channel. When the wind flows continuously and rapidly through the wind gathering channel, the switch devices in the wind gathering channel can be efficiently cooled, reducing the possibility that the switch devices will be seriously heated and affect their normal operation. In addition, since the cross-sectional area of ​​the conventional channel is larger, there are more areas of the wall of the shell that surrounds the conventional channel to set a larger area of ​​air inlet or air outlet, so that the air inlet area or air outlet area of ​​the shell is larger, which is convenient for the airflow to enter the shell or be discharged from the shell. In addition, there can also be a larger space in the conventional channel to place other electronic components located on the first circuit board, so as to make up for the defect of the reduced internal space of the shell caused by the setting of the wind gathering channel, so that the internal space of the shell can meet the rapid flow of wind and does not affect the arrangement and placement of electronic components in the shell.

[0016] In one embodiment of the present application, the switch matrix assembly also includes a second circuit board, which is located in the shell and vertically fixed on the first circuit board. The part of the shell that forms the air inlet is located on one side of the second circuit board in its own thickness direction. A plurality of switch devices are located between the second circuit board and the air inlet. The air outlet includes a first air outlet, and 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 vertically fixed on the first circuit board, and the second circuit board and multiple switch devices share the height space in the housing, which reduces the length and width of the housing, and also reduces the length and width of the switch matrix assembly as a whole, making the space occupancy rate of the switch matrix assembly lower. In addition, when the wind blown by the fan enters the housing from the air inlet, the second circuit board will block part of the flow of wind. Therefore, the first air outlet is set between the second circuit board and the air inlet, so that the wind can be discharged from the first air outlet after being blocked by the second circuit board, reducing the impact of the second circuit board on the exhaust of the housing.

[0018] In one embodiment of the present application, the air outlet also includes a second air outlet, and the part of the shell located on the side of the second circuit board away from the air inlet is the end plate of the shell. Along the direction of the thickness of the first circuit board itself, a part of the end plate blocks the second circuit board, and the other part of the end plate is set with the second air outlet.

[0019] In the case of setting the first air outlet, some wind will still flow around the second circuit board, so a second air outlet can be set on the end plate of the shell. Both the first air outlet and the second air outlet are air outlets for the wind in the shell to be discharged, so that the heat dissipation in the shell can be more comprehensive. In addition, the part of the end plate without the second air outlet will block the second circuit board. When the rear plate of the shell is installed upward, the part of the end plate without the second air outlet can reduce the possibility of external liquid dripping on the second circuit board or the first circuit board, and play a better protective role for the components in the shell.

[0020] In one embodiment of the present application, the switch matrix assembly also includes a connector 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 set. The end of the fan facing away from the mounting seat is fixed to the shell by the connector.

[0021] When the fan needs to be installed, the hook of the fan can be extended into the housing and hooked on the housing, and then the fan can be fixed by the connecting piece; when the fan needs to be disassembled for maintenance, the connecting piece can be removed, and then the hook connection between the fan and the housing can be released by simply moving it. By setting the hook and the connecting piece, the installation and removal 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 staff faces the switch matrix assembly, it is convenient for the staff to remove or install the connecting piece on the front of the switch matrix assembly.

[0022] In one embodiment of the present application, the power distribution device also includes a screw, which passes through the shell, the first circuit board, the metal sheet and the busbar in sequence and is threadedly connected to the mounting seat, and the head of the screw abuts the shell or the first circuit board.

[0023] The screws can not only lock the connection between the switch matrix assembly and the mounting base, but also press the metal sheet on the first circuit board onto the busbar, so that the switch matrix assembly is stably installed while reducing the possibility of poor contact between the metal sheet and the busbar. In addition, the head of the screw is arranged away from the mounting base, which is convenient for the staff to remove or install the screw at the front of the switch matrix assembly when facing the switch matrix assembly.

[0024] In one embodiment of the present application, the shell has a through hole, the screw passes through the through hole, the surface of the shell facing away from the first circuit board has a marking groove, the marking groove is recessed toward the mounting seat, and the marking groove is connected to the through hole.

[0025] When the screw is tightened, a marking line can be drawn at the bottom of the marking groove, and the marking line can extend to the head of the screw to serve as a reference. When the screw is loosened, the marking line is no longer continuous, which can remind the staff that the screw is abnormal and facilitate the staff to perform maintenance. In addition, the marking groove is recessed toward the mounting seat, so that the bottom of the marking groove is closer to the head of the screw, which is convenient for the staff to draw marking lines between the marking groove and the head of the screw.

[0026] In one embodiment of the present application, the power distribution device further includes a positioning column, one of the housing and the mounting seat is fixed with the positioning column, and the other includes a positioning hole, and the positioning column is used to be inserted into the positioning hole.

[0027] When installing the switch matrix assembly, the positioning column can be aligned with the corresponding positioning hole and inserted. The cooperation between the positioning column and the positioning hole can not only play a positioning role, but also play a role in supporting the shell. For example, when the positioning column protrudes in the horizontal direction, the positioning column can be regarded as a supporting structure. The housing is supported by the abutment between the positioning column and the inner wall of the positioning hole, which makes it easier for the staff to accurately and easily connect the switch matrix assembly and the mounting seat.

[0028] In one embodiment of the present application, the positioning column or the positioning hole is located on a side wall of the shell where the opening is set.

[0029] The positioning column is hidden between the shell and the mounting seat, which fully utilizes the area of ​​the mounting seat facing the shell and the side wall of the shell with an opening, thereby reducing the space occupied by the positioning column.

[0030] In a second aspect of the present application, a charging device is provided, which includes a power conversion device, a plurality of charging interfaces, and the above-mentioned power distribution device, wherein 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 interface, and distribute the current output by the power conversion device to one or more corresponding charging interfaces. Among them, the charging device provided by this application includes the above-mentioned power distribution device, so the charging device provided by this application and the power distribution device of the above-mentioned technical solution can solve the same technical problems and have the same technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the overall structure of a charging device provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of the overall structure of another charging device provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of the overall structure of a power distribution device provided in an embodiment of the present application;

[0035] Figure 4 A schematic diagram of a partial explosion structure of a power distribution device provided in an embodiment of the present application;

[0036] Figure 5 A schematic diagram of the overall structure of a switch matrix assembly provided in an embodiment of the present application;

[0037] Figure 6 A schematic diagram of a partial explosion structure of a switch matrix assembly provided in an embodiment of the present application;

[0038] Figure 7 A cross-sectional view of a power distribution device provided in an embodiment of the present application;

[0039] Figure 8 for Figure 7 Magnified view at A in the middle;

[0040] Fig. 9 A schematic diagram of the structure of a marking groove provided in an embodiment of the present application;

[0041] Fig.10 A schematic diagram of the structure of a fan provided in an embodiment of the present application;

[0042] Fig.11 A schematic diagram of the structure of a second circuit board provided in an embodiment of the present application;

[0043] Fig.12 A schematic diagram of the structure of an air outlet provided in an embodiment of the present application;

[0044] Fig.13 A schematic diagram of the structure of a wind gathering channel provided in an embodiment of the present application;

[0045] Fig.14 A schematic diagram of the structure of another wind gathering channel provided in an embodiment of the present application;

[0046] Fig.15 A side view of a switch matrix assembly provided in an embodiment of the present application;

[0047] Fig.16 for Fig.15 Cross-sectional view at AA in the middle;

[0048] Fig.17 for Fig.15 Cross-section at the middle BB;

[0049] Fig.18 for Fig.15 Cross-sectional view at CC.

[0050] Reference numerals:

[0051] 100-charging equipment; 101-equipment 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 slot; 318-air inlet; 319-air outlet; 3191-first air outlet; 3192-second air outlet; 320-end plate; 321-first air duct; 3 211-wind gathering channel; 3212-conventional channel; 322-second air duct; 323-protruding part; 324-recessed part; 3241-avoidance groove; 325-support column; 32-first circuit board; 33-switch 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-connector. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0054] In this application, the terms "first", "second", etc. are used only for descriptive purposes to distinguish one element from another element, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0055] In the present application, unless otherwise clearly specified or limited, "plurality" means two or more.

[0056] In addition, in this application, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

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

[0058] The present application embodiment provides a charging device 100, which may be a charging pile, for example, an integrated charging pile. Figure 1 The structure of a charging device 100 (integrated charging pile) is shown as an example. Figure 1 The charging device 100 includes a device cabinet 101 and at least one charging gun 102 (for example, Figure 1 The figure shows a situation where there are multiple charging guns 102 . When the charging guns 102 are not charging, they can be plugged into the equipment cabinet 101 for personnel to use at any time.

[0059] For another example, the charging device 100 may also be a split-type charging pile. Figure 2 The structure of another charging device 100 (split charging pile) is shown as an example. 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 diagram shows a situation of multiple charging terminals 104 and multiple charging guns 102 , 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 into the corresponding charging terminal 104 for personnel to use from the charging terminal 104 .

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

[0061] The input end of the power conversion device 105 is used to receive AC power, and the output end of the power conversion device 105 is used to output DC power. Figure 1 and Figure 2 , the power conversion device 105 may include multiple AC-DC modules and multiple DC-DC modules. The output end of the power conversion device 105 is electrically connected to the input end of the power distribution device 106, and the output end of the power distribution device 106 is electrically connected to the input ends of multiple 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 to make the output end of the charging interface 107 output direct current, so as to charge the device to be charged (for example, an electric vehicle) through the charging gun 102. In some other examples, the power conversion device 105 may include multiple AC-DC modules, and no DC-DC module is provided.

[0062] It should be noted that Figure 1 and Figure 2 The charging devices 100 shown are merely examples of two charging devices 100 provided in the present application, and are not limitations on the charging devices 100 of the present application.

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

[0064] Figure 4 A partial exploded view of a power distribution device 106 is shown as an example. Figure 4The power distribution device 106 includes a mounting base 1, a busbar 2 and a switch matrix assembly 3. The busbar 2 may be a copper busbar or an aluminum busbar, which is fixed (for example, by bolting, riveting, bonding, etc.) on the mounting base 1 and is used for current input or output. For example, the busbar 2 is electrically connected to the output end of the power conversion device 105 (the power conversion device 105 may refer to Figure 1 or Figure 2 ), for example, the busbar 2 is electrically connected to the input end of one or more corresponding charging interfaces 107 (the charging interface 107 can refer to Figure 1 or Figure 2 ), for another example, the busbar 2 electrically connects the output end of the power conversion device 105 and the input end of at least one charging interface 107. In addition, the switch matrix assembly 3 is mounted on the mounting base 1.

[0065] The embodiment of the present application provides a switch matrix component 3, Figure 5 A switch matrix component 3 is shown as an example. Figure 6 An exemplary partial exploded view of a switch matrix assembly 3 is shown. Figure 5 and Figure 6 The switch matrix assembly 3 includes a housing 31, a first circuit board 32, a metal sheet 34 and a plurality of switch devices 33 ( Figure 6 Only two switch devices 33 are representatively marked in the figure. The housing 31 may be any suitable housing structure. For example, the housing 31 may be an integrated housing. For another example, the housing 31 may be a split housing (for example, Figure 6 The housing 31 has a space for installing a device or apparatus inside, and the housing 31 also has an opening 310 connected to its internal space. The size of the opening 310 can be set according to needs. For example, the opening 310 can be a mounting opening on the side wall of the housing 31. 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 arranged outside the mounting seat 1).

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

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

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

[0069] The metal sheet 34 is electrically connected to at least one of the multiple switch devices 33. 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 multiple switch devices 33. The present application does not impose any specific restrictions on this. There are many ways in which the metal sheet 34 can be electrically connected to the switch device 33. In one example provided in the present application, Figure 7 A cross-sectional view of a power distribution device 106 is shown by way of example, in which a metal sheet 34 and a plurality of switch devices 33 are fixed on different surfaces of a first circuit board 32, each switch device 33 includes a device shell 331 and a pin 332, and the device shell 331 is provided with structures such as contacts for disconnecting current (not shown in the drawings), and the pin 332 is fixed on the device shell 331, and the pin 332 of each switch device 33 passes through the first circuit board 32 and is electrically connected to the corresponding metal sheet 34.

[0070] When the housing 31 is an integrated housing, the first circuit board 32 can be installed in the housing 31 through the opening 310. When the housing 31 is a split housing, the first circuit board 32 can be installed in the housing 31 by disassembling the housing 31. For example, Figure 5 and Figure 6The housing 31 may include a protective cover 311, a frame 312 and a fastener 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 the internal space of the housing 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 fastener 313, wherein the fastener 313 may be a screw, a bolt, a rivet, an adhesive, etc. The present application does not specifically limit the structural form of the fastener 313. Figure 6 Only a portion of the fasteners 313 are shown as examples, and other fasteners 313 are hidden.

[0071] To facilitate disassembly and installation, at least part of the fasteners 313 may be disposed on a side of the protective cover 311 away from the frame 312 , which facilitates the staff to remove or install the fasteners 313 at the front of the switch matrix assembly 3 .

[0072] In the above example, the shell 31 is a split shell. 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 that are separated from each other, and then the protective cover 311 and the frame 312 are fixed by fasteners 313. The installation of the first circuit board 32 can be achieved, reducing the difficulty of installing the first circuit board 32.

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

[0074] In some examples, the reference is returned Figure 4 and Figure 5 The power distribution device 106 also includes at least one positioning column 5 ( Figure 4 and Figure 5 The exemplary case of multiple positioning posts 5 is shown, where one of the housing 31 and the mounting base 1 is fixed with a positioning post 5 , and the other has a positioning hole 314 , and each positioning post 5 is used to be inserted into the corresponding positioning hole 314 .

[0075] In the case where one positioning post 5 and one positioning hole 314 are provided, the positioning post 5 can be provided on the mounting seat 1, and the corresponding positioning hole 314 is provided on the housing 31; the positioning post 5 can also be provided on the housing 31, and the corresponding positioning hole 314 is provided on the mounting seat 1. Figure 4 and Figure 5In the case where there are multiple positioning posts 5 and positioning holes 314, the multiple positioning posts 5 are fixed on the mounting seat 1, and the multiple positioning holes 314 are located on the housing 31. In some other examples, the multiple positioning posts 5 can be fixed on the housing 31, and the multiple positioning holes 314 can be located on the mounting seat 1. In some other examples, a part of the positioning posts 5 can be fixed on the housing 31, and the positioning holes 314 corresponding to the part of the positioning posts 5 can be located on the mounting seat 1, and another part of the positioning posts 5 can be fixed on the mounting seat 1, and the positioning holes 314 corresponding to the part of the positioning posts 5 can be located on the housing 31.

[0076] When installing the switch matrix assembly 3, the positioning column 5 can be aligned with the corresponding positioning hole 314 and inserted. The cooperation between the positioning column 5 and the positioning hole 314 can not only play a positioning role, but also play a role in supporting the housing 31. Figure 4 and Figure 5 When installed in the vertical direction, the positioning column 5 protrudes in the horizontal direction. The protruding positioning column 5 can be regarded as a supporting structure. The housing 31 is supported by the abutment between the positioning column 5 and the inner wall of the positioning hole 314, which makes it easy for the staff to accurately and easily connect the switch matrix assembly 3 and the mounting base 1.

[0077] Reference Figure 4 and Figure 5 In the case where there are multiple positioning posts 5 and positioning holes 314, one of the multiple positioning posts 5 (the first positioning post 51) can be fixed on the top of the mounting seat 1, and the positioning hole 314 (the first positioning hole 3141) corresponding to the first positioning post 51 is located at the top of the shell 31. For example, the first positioning hole 3141 is located on the ear 315 of the shell 31 (the ear 315 is a part of the shell 31, and the ear 315 can be connected to other parts of the shell 31 by bolts). Another positioning post 5 (the second positioning post 52) ​​among the multiple positioning posts 5 can be fixed on the bottom of the mounting seat 1, and the positioning hole 314 (the second positioning hole 3142) corresponding to the second positioning post 52 is located at the bottom of the shell 31. In addition, a fastening structure 6 (for example, a screw, a bolt, a rivet, etc.) is provided on the side of each of the first positioning post 51 and the second positioning post 52. The fastening structure 6 is used to fix the shell 31 and the mounting seat 1 after the positioning post 5 is inserted into the corresponding positioning hole 314. In addition, according to actual needs, the fastening structure 6 can be set at a position that is convenient for workers to remove or install.

[0078] In some examples, reference Figure 4 and Figure 5, a part of the positioning holes 314 (for example, the third positioning hole 3143 and the fourth positioning hole 3144) among the plurality of positioning holes 314 can be located on the side wall (side wall C1) where the opening 310 is provided in the shell 31. The positioning column 5 (third positioning column 53) corresponding to the third positioning hole 3143 and the positioning column 5 (fourth positioning column 54) corresponding to the fourth positioning hole 3144 are both fixed on the mounting seat 1. The part of the positioning column 5 (third positioning column 53 and fourth positioning column 54) is hidden between the shell 31 and the mounting seat 1, and the area of ​​the mounting seat 1 facing the shell 31 and the side wall of the shell 31 where the opening 310 is provided are fully utilized, which not only plays the role of installation positioning, but also reduces the space occupied by the positioning column 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, refer to Figure 6 The positioning holes 314 on the side wall (side wall C1 ) of the housing 31 provided with the opening 310 may be located on the frame 312 , for example, the third positioning hole 3143 and the fourth positioning hole 3144 may be located on the frame 312 .

[0080] It can be understood that the shell 31 and the mounting base 1 are positioned by means of multiple positioning columns 5 and corresponding positioning holes 314, so that the installation position of the shell 31 can be more accurate. However, in some examples, the shell 31 and the mounting base 1 can also be positioned by means of only one positioning column 5 and corresponding positioning hole 314. The positioning column 5 can be set at any suitable position of the shell 31, and the positioning column 5 can also be set at any suitable position on the mounting base 1.

[0081] In addition, the positioning hole 314 may be a through hole 316 (a through hole) or a blind hole (a non-through hole).

[0082] After the switch matrix assembly 3 is fixed on the mounting base 1, the opening 310 of the housing 31 is arranged toward the mounting base 1. Figure 7 This shows the state where the switch matrix assembly 3 is fixed on the mounting base 1. Figure 8 for Figure 7 The enlarged view of A in the middle, refer to Figure 7 and Figure 8 , the opening 310 is arranged toward the mounting base 1, that is, the metal sheet 34 on the first circuit board 32 is arranged toward the mounting base 1, and the busbar 2 is exposed on the side of the mounting base 1 facing the housing 31. After the switch matrix assembly 3 is fixed on the mounting base 1, one of the metal sheet 34 and the busbar 2 passes through the opening 310 and is connected to the other (fixed to or in contact with each other). For example, Figure 7 and Figure 8In the example shown, the busbar 2 passes through the opening 310 and is connected to the metal sheet 34 in the housing 31. In other examples, the metal sheet 34 may pass through the opening 310 and extend outside the housing 31 and be connected to the busbar 2 outside the housing 31.

[0083] For example, the power conversion device 105 includes multiple power modules, and the busbar 2(a) is electrically connected to the output end of one of the power modules (a) of the power conversion device 105, and the busbar 2(a) is also electrically connected to the input end of the charging interface 107(a) corresponding to the power module (a). The current output by the power module (a) can be directly transmitted 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 transmitted to the metal sheet 34 corresponding to the busbar 2(a) through the busbar 2(a), and then flow through the switching device 33 electrically connected to the metal sheet 34, and the current is distributed to other busbars 2(b) through the switching device 33. The busbar 2(b) is electrically connected to the charging interface 107(b), thereby realizing the current of the power module (a) being allocated to the charging interface 107(b).

[0084] In some other examples, the output end of the power conversion device 105 is connected to a plurality of busbars 8(c), the input end of each charging interface 107 is connected to a busbar 8(d), the plurality of busbars 8(c) are respectively connected to corresponding metal sheets 34, the plurality of busbars 8(d) are respectively connected to corresponding metal sheets 34, and the metal sheets 34 connected to the plurality of busbars 8(c) are different from the metal sheets 34 connected to any busbar 8(d). In other words, the plurality of busbars 8(c) connected to the output end of the power conversion device 105 are not directly connected to or in contact with the busbar 8(d) connected to the input end 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 it can be transmitted to the designated charging interface 107.

[0085] The present application integrates a plurality of switch devices 33 on the first circuit board 32, and installs the first circuit board 32 in the housing 31, thereby improving the integration of the switch matrix assembly 3, facilitating the overall installation and overall replacement of the switch matrix assembly 3, and reducing the difficulty of assembling the power distribution device 106. In addition, the switch devices 33 on the first circuit board 32 are electrically connected through the metal sheet 34 on the first circuit board 32. Since the metal sheet 34 is arranged toward the opening 310 of the housing 31, when the switch matrix assembly 3 is installed on the mounting seat 1, the connection between the metal sheet 34 and the busbar 2 can be realized. In this way, the current input or output through the busbar 2 can be controlled by the corresponding switch device 33 to realize the distribution of the current by the power distribution device 106. By setting the first circuit board 32 and the metal sheet 34, the electrical connection between the busbar 2 and the corresponding switch device 33 is realized, and the use of copper bars and the occupation of space in the switch matrix assembly 3 are reduced.

[0086] In some examples, reference Figure 8 The power distribution device 106 further includes a screw 4, wherein the screw 4 may be a screw head, a bolt, etc. The screw 4 sequentially passes through the housing 31, the first circuit board 32, the metal sheet 34 and the busbar 2, and the screw 4 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 the through hole 316 is larger than the diameter of the head of the screw 4, the head of the screw 4 is located in the through hole 316, and the head of the screw 4 abuts the first circuit board 32. In other examples, the diameter of the through hole 316 is smaller than the diameter of the head of the screw 4, in which case the head of the screw 4 may also abut the housing 31.

[0087] In some examples, multiple screws 4, metal sheets 34, and busbars 2 may be provided, and multiple screws 4 pass through the housing 31 and the first circuit board 32, and each screw 4 passes through a corresponding metal sheet 34 and a corresponding busbar 2 and is threadedly connected to the mounting base 1. In other examples, multiple screws 4, metal sheets 34, and busbars 2 may be provided, and multiple screws 4 pass through the housing 31 and the first circuit board 32, but only one or a part of the screws 4 pass through the corresponding metal sheet 34 and the corresponding busbar 2 and are threadedly connected to the mounting base 1.

[0088] The screw 4 can not only lock the connection between the switch matrix assembly 3 and the mounting base 1, but also press the metal sheet 34 on the first circuit board 32 onto the busbar 2, so that the switch matrix assembly 3 is stably installed, and the possibility of poor contact between the metal sheet 34 and the busbar 2 is reduced. In addition, the head of the screw 4 is arranged away from the mounting base 1, which is convenient for the staff to remove or install the screw 4 at the front of the switch matrix assembly 3 when facing the switch matrix assembly 3.

[0089] In addition, in some examples, the surface of the housing 31 has a marking groove 317. Fig. 9 The structure of a marking groove 317 is shown as an example. Figure 8 and Fig. 9 The marking groove 317 is located on the surface of the housing 31 away from the first circuit board 32, and the marking groove 317 is recessed toward the mounting seat 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 arranged, or in other words, the bottom surface of the marking groove 317 is closer to the mounting seat 1. The marking groove 317 is connected to the through hole 316, for example, Fig. 9 An example is shown in which the housing 31 has a plurality of through holes 316. In this example, a plurality of marking grooves 317 may be provided, and each through hole 316 is connected to a marking groove 317. In other examples, a marking groove 317 may be connected to a plurality of through holes 316.

[0090] The marking groove 317 is recessed toward the mounting base 1, so that the bottom surface of the marking groove 317 is 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 drawn marking line can extend to the head of the screw 4 to serve as a reference. When the screw 4 is loose, the marking line is no longer continuous, which can remind the staff that the state of the screw 4 is abnormal, making it easier for the staff to judge the state of the screw 4 and facilitate timely maintenance.

[0091] Reference Fig. 9 In some examples, the switch matrix assembly 3 further includes a fan 35, and the housing 31 has an air inlet 318 and an air outlet 319, and the fan 35 is disposed at the air inlet 318. The fan 35 blows air toward the air inlet 318, and the air blown by the fan 35 flows in the housing 31, taking away part of the heat of the first circuit board 32 and the electronic components thereon (for example, the switch device 33). In other words, the first circuit board 32 and the electronic components thereon exchange heat with the air blown by the fan 35, and finally, the air blown into the housing 31 is discharged from the air outlet 319, so as to achieve heat dissipation of the first circuit board 32 and the electronic components thereon.

[0092] The fan 35 can be installed on the housing 31 in any suitable manner. In addition, the fan 35 can be arranged inside the housing 31, outside the housing 31, or part of the fan 35 can be located inside the housing 31 and the other part can be located outside the housing 31.

[0093] Fig.10 The example shows Fig. 9 In the case where the fan 35 is removed from the housing 31, Fig.10 The arrow 1 in the figure indicates the position of the mounting base 1, refer to Fig. 9 and Fig.10The switch matrix assembly 3 further includes a hook 351, which is fixed (for example, integrally connected) to the end of the fan 35 facing the mounting seat 1, and the hook 351 extends into the housing 31 through the air inlet 318, and is hooked on the wall (wall C4) of the housing 31 where the air inlet 318 is provided. The end of the fan 35 away from the mounting seat 1 is fixed to the housing 31, for example, the switch matrix assembly 3 further includes a connector 7, which can be a screw top, a bolt, a pin, etc., and the end of the fan 35 away from the mounting seat 1 is fixed to the housing 31 through the connector 7.

[0094] By means of the above-mentioned 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 can be fixed by the connecting member 7. When the fan 35 needs to be disassembled for maintenance, the connecting member 7 can be disassembled, and then the hook connection between the fan 35 and the housing 31 can be released by simply moving it. By setting the hook 351 and the connecting member 7, the installation and removal steps of the fan 35 can be simplified, and the fan 35 can be quickly disassembled and assembled. In addition, since the connecting member 7 is located at the end of the fan 35 away from the mounting seat 1, when the staff faces the switch matrix assembly 3, it is convenient for the staff to remove or install the connecting member 7 at 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 located at the bottom of the housing 31, and the air outlet 319 is located at the top of the housing 31. The plurality of switch devices 33 are located between the air inlet 318 and the air outlet 319, so that the plurality of switch devices 33 can fully dissipate heat.

[0096] In some examples, the switch matrix assembly 3 further includes a second circuit board 36, Fig.11 (Cross-sectional view) shows an exemplary structure of a second circuit board 36, wherein the second circuit board 36 can be a control board, and the second circuit board 36 is vertically fixed on the first circuit board 32. The above-mentioned "vertical" is not limited to an absolute vertical intersection (angle of 90°), and allows for a non-absolute vertical intersection relationship caused by factors such as assembly tolerance, design tolerance, and structural flatness. That is, a certain range of errors is allowed. For example, the assembly error range of the angle of 70° to 110° can be understood as a vertical relationship. The second circuit board 36 is vertically fixed on the first circuit board 32, and the second circuit board 36 and multiple 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 overall length and width of the switch matrix assembly 3, 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 ( Fig.11In the case shown in the figure), the second circuit board 36 can also be arranged at one end of the first circuit board 32 and extend toward both sides of the first circuit board 32 itself in the thickness direction.

[0098] When a second circuit board 36 is arranged on the first circuit board 32, the air inlet 318 is located on one side of the second circuit board 36 in its own thickness direction (for example, the air inlet 318 is located below the board surface of the second circuit board 36), and a plurality of switch devices 33 are located between the second circuit board 36 and the air inlet 318. Fig.12 The structure of an air outlet 319 is shown as an example, wherein the air outlet 319 includes a first air outlet 3191, and the first air outlet 3191 is located between the second circuit board 36 and the air inlet 318. When the wind blown out by the fan 35 blows into the air inlet 318, the second circuit board 36 will block the flow of part of the wind. Therefore, the first air outlet 3191 is arranged between the second circuit board 36 and the air inlet 318, so that the wind can be discharged from the first air outlet 3191 after being blocked by the second circuit board 36, thereby reducing the possibility that the second circuit board 36 blocks the wind in the housing 31 from being discharged outward. The first air outlet 3191 may include a plurality of air holes for ventilation.

[0099] Regarding the position of the first tuyere 3191, in some examples, refer to Fig.12 The air inlet 318 and the air outlet 319 are distributed along the first direction (the first direction is also Fig.12 The housing 31 and the mounting base 1 are distributed along the second direction (the second direction is also the thickness direction of the second circuit board 36). Fig.12 The first direction is perpendicular to the second direction, and the first air vents 3191 are arranged on the two side walls (side walls C5) of the housing 31 distributed in the third direction, and the first direction and the second direction are both perpendicular to the third direction. In some other examples, the first air vents 3191 can also be arranged on the wall of the housing 31 away from the first circuit board 32, and the present application does not make any specific restrictions on this.

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

[0101] When the first air outlet 3191 is set, some wind will still flow around the second circuit board 36. Therefore, the second air outlet 3192 can be set on the end plate 320 of the shell 31. The first air outlet 3191 and the second air outlet 3192 are both part of the air outlet 319 for the wind in the shell 31 to be discharged. This can make the heat dissipation in the shell 31 more comprehensive.

[0102] The portion of the end plate 320 that is not provided with the second air vent 3192 (area C6) will block the second circuit board 36. When the rear plate 320 is facing upward after the housing 31 is installed, the portion of the end plate 320 that is not provided with the second air vent 3192 can reduce the possibility of external liquid dripping onto the second circuit board 36 or the first circuit board 32, and play a better protective role for the components in the housing 31. It should be noted that the portion of the end plate 320 that blocks the second circuit board 36 is not provided with the second air vent 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 to pass through, etc., and this application does not make specific restrictions on this.

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

[0104] After the wind blown by the fan 35 is blown into the housing 31 from the air inlet 318, the wind will enter different air ducts in the housing 31, for example, Fig.11The internal space of the housing 31 includes a first air duct 321 and a second air duct 322 located on different sides of the first circuit board 32. The device housing 331 of each switch device 33 is located in the first air duct 321. The pin 332 of each switch device 33 passes through the first circuit board 32 and extends into the second air duct 322. The metal sheet 34 is located in the second air duct 322 and connects the pin 332 of the corresponding switch device 33. The first air duct 321 and the second air duct 322 are both connected to the air inlet 318 and the air outlet 319. When the fan 35 is running, 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 on both sides of the first circuit board 32. For example, the device shell 331 of the switch device 33 is set on one side of the first circuit board 32, the pin 332 of the switch device 33 passes through the first circuit board 32 and is electrically connected to the metal sheet 34, the device shell 331 of the switch device 33 dissipates heat in the first air duct 321, and the connection position between the pin 332 of the switch device 33 and the metal sheet 34 dissipates heat 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 of the power distribution device 106 failing to operate normally due to excessive temperature is reduced.

[0105] The structure of the first air duct 321 can be changed as needed, for example, referring to Fig.12 In some examples, the first air duct 321 includes a connected wind-gathering channel 3211 and a conventional channel 3212, wherein the cross-sectional area of ​​the wind-gathering channel 3211 is smaller than the cross-sectional area of ​​the conventional channel 3212, at least part of the plurality of switch devices 33 (all switch devices 33 or part of the 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 disposed on the wall of the housing 31 that encloses the conventional channel 3212. Fig.12 In the example shown, two conventional channels 3212 are provided, the wind focusing channel 3211 is located between the two conventional channels 3212, the air inlet 318 is provided on the wall of one of the conventional channels 3212 surrounded by the shell 31, and the air outlet 319 is provided on the wall of the other conventional channel 3212 surrounded by the shell 31.

[0106] There are many ways to form the wind-gathering channel 3211. Fig.13 The structure of a wind gathering channel 3211 is shown as an example. Fig.13 The structure shown is understood as Fig.12 Simplification of the structure, see Fig.12 and Fig.13 The two side walls (two side walls C5) of the housing 31 in the third direction both have a protruding portion 323 and a concave portion 324. In the third direction, the concave portion 324 is closer to the plurality of switch devices 33 than the protruding portion 323 ( Fig.13The wind gathering channel 3211 is located between the two recessed portions 324 (see the dotted box in the figure).

[0107] In some examples, the auxiliary reference Fig.12 In order to avoid the screw 4, the recessed portion 324 may also be provided with a plurality of avoidance grooves 3241, so that the space size of the wind gathering channel 3211 can be further reduced.

[0108] Fig.14 Another structure of the wind collecting channel 3211 is shown as an example. Fig.14 , the wind-collecting channel 3211 and the conventional channel 3212 are each provided with one, and the two side walls (two side walls C5) of the housing 31 distributed in the third direction both have a protruding portion 323 and a concave portion 324. In the third direction, the concave portion 324 is closer to the plurality of switch devices 33 (compared with the protruding portion 323) Fig.14 ), the wind gathering channel 3211 is located between the two recessed portions 324. In this example, the air inlet 318 can be arranged on the wall of the shell 31 that forms the wind gathering channel 3211, and the air outlet 319 can be arranged on the wall of the shell 31 that forms the conventional channel 3212.

[0109] In some other examples, one of the two side walls (two side walls C5 ) of the housing 31 distributed in the third direction has a protruding portion 323 and a concave portion 324 , and the other side wall has no obvious concave structure.

[0110] By setting up the wind-gathering channel 3211, the flow rate of the wind can be increased. When the wind blown out by the fan 35 enters the first wind channel 321, it will pass through the wind-gathering channel 3211. Since the cross-sectional area of ​​the wind-gathering channel 3211 is small, the flow rate of the wind is faster, and the wind can quickly take away the heat in the wind-gathering channel 3211. At least part of the multiple switch devices 33 is set in the wind-gathering channel 3211. When the wind continuously and quickly flows through the wind-gathering channel 3211, the switch devices 33 in the wind-gathering channel 3211 can be efficiently cooled, thereby reducing the possibility that the switch devices 33 are seriously heated and affect their normal operation.

[0111] In addition, since the cross-sectional area of ​​the conventional channel 3212 is larger, the wall of the shell 31 surrounding the conventional channel 3212 has more areas where larger air inlets 318 or air outlets 319 can be set, so that the air inlet area or air outlet area of ​​the shell 31 is larger, which is convenient for wind to enter the shell 31 and also convenient for wind in the shell 31 to be discharged. In addition, there can also be more space in the conventional channel 3212 for setting other electronic components located on the first circuit board 32, making up for the defect of reduced internal space of the shell 31 caused by setting the wind-collecting channel 3211, so that the internal space of the shell 31 can meet the rapid flow of wind and does not affect the arrangement and placement of electronic components in the shell 31.

[0112] Regarding the size of the cross-sectional area of ​​the wind-collecting channel 3211 and the cross-sectional area of ​​the conventional channel 3212, the cross-sectional area of ​​the wind-collecting channel 3211 cut and the cross-sectional area of ​​the conventional channel 3212 cut need to be parallel to each other, and the cross-sectional area of ​​the wind-collecting channel 3211 and the cross-sectional area of ​​the conventional channel 3212 are both parallel to the thickness direction of the first circuit board 32, and the cross-sectional area of ​​the wind-collecting channel 3211 and the cross-sectional area of ​​the conventional channel 3212 are both perpendicular to the distribution direction of the wind-collecting channel 3211 and the conventional channel 3212. In the example of setting the second circuit board 36, the cross-sectional area of ​​the wind-collecting channel 3211 and the cross-sectional area of ​​the conventional channel 3212 are both perpendicular to the thickness direction of the second circuit board 36.

[0113] For example, Fig.15 shows a side view of a switch matrix assembly 3, Fig.16 for Fig.15 The cross-sectional view at AA in the middle. Fig.16 The middle grid shaded portion (M1) is a cross section of one of the conventional channels 3212. Fig.17 for Fig.15 Cross-sectional view at BB in the middle, Fig.17 The middle grid shaded portion (M2) is the cross section of the wind gathering channel 3211; Fig.18 for Fig.15 Cross-sectional view at CC, Fig.18 The middle grid shaded portion (M3) is a cross section of another conventional channel 3212. Fig.16 and Fig.17 Contrast, and Fig.17 and Fig.18 By comparison, it can be more intuitively concluded that the cross-sectional areas of the two conventional channels 3212 are both larger than the cross-sectional area of ​​the wind gathering channel 3211 .

[0114] Due to the production and processing of the shell 31, the cross-sectional areas of the wind-gathering channel 3211 at different positions may be unequal. In this case, when compared with the cross-sectional areas of the conventional channels 3212, the maximum cross-sectional area of ​​the wind-gathering channel 3211 can be taken. When the cross-sectional areas of the conventional channels 3212 at different positions are unequal, when compared with the cross-sectional areas of the wind-gathering channel 3211, the minimum cross-sectional area of ​​the conventional channels 3212 can be taken.

[0115] In other examples, the housing 31 may also be a protective cover outside the mounting base 1, and the first circuit board 32 may be fixed to the mounting base 1 first, and then the housing 31 may be installed, that is, after the first circuit board 32 is fixed to the mounting base 1, the housing 31 is then covered outside the first circuit board 32. The present application does not impose any specific restrictions on the installation order of the housing 31, the first circuit board 32, and other structures.

[0116] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A power distribution device for distributing an input current into at least one path and outputting the current, characterized in that: The power distribution device comprises a mounting base, a busbar and a switch matrix assembly, wherein the busbar is fixed on the mounting base and is used for current input or output, and the switch matrix assembly comprises: A shell, the shell is fixed on the mounting seat, the shell has an opening communicating with its internal space, and the opening faces the mounting seat; a first circuit board, wherein the first circuit board is fixed in the housing; A plurality of switch devices for controlling on and off, wherein the plurality of switch devices are fixed on the first circuit board; A metal sheet is fixed on a surface of the first circuit board facing the opening, the metal sheet is electrically connected to at least one of the plurality of switch devices, and the metal sheet and one of the busbars pass through the opening and are connected to the other.

2. The power distribution device according to claim 1, characterized in that: The shell includes a protective cover, a frame and fasteners. The protective cover and the frame are fixedly connected by the fasteners. 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, and the opening is arranged on the frame.

3. The power distribution device according to claim 1, characterized in that: The switch matrix assembly further includes a fan, the housing has an air inlet and an air outlet, and the fan is arranged at the air inlet.

4. The power distribution device according to claim 3, characterized in that: The internal space of the shell includes a first air duct and a second air duct located on different sides of the first circuit board. Each of the switch devices includes a device shell and pins fixed to the device shell. The device shell of each of the switch devices is located in the first air duct. The pins of each of the switch devices pass through the first circuit board and extend into the second air duct. The metal sheet is located in the second air duct and is connected to the pin of at least one of the switch devices. The first air duct and the second air duct are both connected to the air inlet and the air outlet.

5. The power distribution device according to claim 4, characterized in that: The first air duct includes a connected wind gathering channel and a conventional channel, the cross-sectional area of ​​the wind gathering channel is smaller than the cross-sectional area of ​​the conventional channel, at least part of the multiple switch devices are 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 that surrounds the conventional channel.

6. The power distribution device according to claim 3, characterized in that: The switch matrix assembly also includes a second circuit board, which is vertically fixed on the first circuit board. The portion of the shell that forms the air inlet is located on one side of the second circuit board in its own thickness direction. The multiple switch devices are located between the second circuit board and the air inlet. The air outlet includes a first air outlet, which is located between the second circuit board and the air inlet.

7. The power distribution device according to claim 6, characterized in that: The air outlet also includes a second air outlet, and the portion of the shell located on the side of the second circuit board away from the air inlet is the end plate of the shell, and along the direction of the thickness of the first circuit board itself, a portion of the end plate blocks the second circuit board, and the other portion of the end plate is provided with the second air outlet.

8. The power distribution device according to claim 3, characterized in that: The switch matrix assembly also includes a connector and a hook, wherein 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 set, and the end of the fan facing away from the mounting seat is fixed to the shell through the connector.

9. The power distribution device according to claim 1, characterized in that: The power distribution device also includes a screw, which passes through the shell, the first circuit board, the metal sheet and the busbar in sequence and is threadedly connected to the mounting seat, and the head of the screw abuts against the shell or the first circuit board.

10. The power distribution device according to claim 9, characterized in that: The shell has a through hole, and the screw passes through the through hole. The surface of the shell facing away from the first circuit board has a marking groove, and the marking groove is recessed toward the mounting seat, and the marking groove is connected to the through hole.

11. The power distribution device according to any one of claims 1 to 10, characterized in that: The power distribution device further comprises a positioning column, one of the housing and the mounting seat is fixed with the positioning column, and the other comprises a positioning hole, and the positioning column is used to be inserted into the positioning hole.

12. The power distribution device according to claim 11, characterized in that: The positioning column or the positioning hole is located on a side wall of the housing where the opening is arranged.

13. A charging device, characterized in that: It comprises a power conversion device, a plurality of charging interfaces, and a power distribution device as described in any one of claims 1 to 12, wherein the busbar is electrically connected to an output end of the power conversion device and / or an input end of at least one of the charging interfaces.

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