Power distribution apparatus and charging device

Abstract

The embodiments of the present application relates to the technical field of energy sources. Provided are a power distribution apparatus and a charging device. The power distribution apparatus is configured to divide an input current into at least one path and output same. The power distribution apparatus comprises a mounting base, a circuit board, a connecting piece, a screw and an insert, wherein the connecting piece is fixed on the surface of one side of the circuit board, the circuit board has a first through hole, and the connecting piece has a second through hole in communication with the first through hole, the diameter of the first through hole being greater than the diameter of the second through hole; part of the insert is located in the first through hole and abuts against the connecting piece, and the other part of the insert is located outside the first through hole; and the screw passes through the insert, the first through hole and the second through hole and is threadedly connected to the mounting base, and the head of the screw is located on the side of the circuit board away from the connecting piece and abuts against the part of the insert located outside the first through hole.

Description

Power distribution device and charging device

[0001] The present application claims priority to the Chinese patent application No. 202422347806.X, filed on September 25, 2024, and entitled "Power distribution device and charging device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of energy, and in particular to a power distribution device and a charging device. BACKGROUND

[0003] With the development of the times, the requirements for the circuit board to accept power in the device are getting higher and higher, which means that the size of the power screw (e.g., bolt, screw, etc.) on the circuit board will increase, and the number of power screws will also increase. In addition, in order to fix the circuit board, the screw specification required is also increasing.

[0004] In the related art, directly locking a large-size screw on the circuit board is easy to cause the circuit board to crack, affecting the normal use of the circuit board.

[0005] Practical new type content

[0006] The present application provides a power distribution device and a charging device comprising the power distribution device, which can not only fix the circuit board by screw, but also reduce the possibility of the circuit board being directly crushed by the screw.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] In a first aspect, the present application provides a power distribution device for distributing an input current into at least one path and outputting, comprising a mounting seat, a circuit board, a connecting piece, a screw and an insert, the connecting piece is fixed on the board surface of one side of the circuit board, the circuit board has a first through hole, the connecting piece has a second through hole in communication with the first through hole, the hole diameter of the first through hole is larger than the hole diameter of the second through hole; a part of the insert is located in the first through hole and abuts against the connecting piece, another part of the insert is located outside the first through hole, the screw passes through the insert, the first through hole and the second through hole and is threadedly connected with the mounting seat, the head of the screw is located on the side of the circuit board away from the connecting piece and abuts against the part of the insert located outside the first through hole.

[0009] The power distribution device can be used in various devices, such as a charging device, to improve the utilization rate of the power module. When it is necessary to fix the circuit board to the mounting seat, the screw is passed through the first through hole of the circuit board and the second through hole of the connecting piece, and then the screw is screwed and locked with the mounting seat, so that the circuit board can be fixed to the mounting seat. The locked screw abuts against the insert, and then the insert abuts against the connecting piece, so that the connecting piece is clamped between the insert and the mounting seat. In this way, the screw can not directly abut against the circuit board, but through the clamping of the connecting piece by the insert and the mounting seat, the fixing of the circuit board is realized. Both the fixing of the circuit board and the reduction of the possibility of the circuit board being directly pressed and damaged by the screw are achieved.

[0010] In an embodiment of the present application, the insert includes a connected embedded portion and a flange portion, the embedded portion is located in the first through hole, the flange portion is located outside the first through hole, the flange portion protrudes outward along the radial direction of the first through hole, the flange portion abuts against the head of the screw, and there is a gap between the flange portion and the circuit board.

[0011] The use of the insert with different diameters makes the contact area between the insert and the head of the screw larger. During the locking of the screw, the flange portion can bear more stress, and the friction between the head of the screw and the insert is increased, thereby reducing the possibility of the screw loosening after being locked. In addition, there is a gap between the flange portion and the circuit board, so that the flange portion does not abut against the circuit board after the screw is locked, and the circuit board does not directly bear the pressure of the screw, thereby reducing the possibility of the circuit board being damaged.

[0012] In an embodiment of the present application, the flange portion is annular, and the outer diameter of the flange portion is greater than the diameter of the plane of the head of the screw for contacting the flange portion.

[0013] The flange portion protrudes towards the outer periphery of the head of the screw, so that the contact area between the flange portion and the screw is larger, and the friction therebetween is further increased, thereby making the screw less likely to loosen.

[0014] In an embodiment of the present application, the insert is annular, and the outer diameter of the insert is equal in the axial direction of the insert. The outer diameter of the insert is smaller than the inner diameter of the first through hole and greater than the inner diameter of the second through hole.

[0015] The use of the insert with equal diameters, that is, the insert is annular. After the insert is installed, the diameter of the insert is smaller than the inner diameter of the first through hole, so that the insert can be installed in the first through hole. Since the diameter of the insert is greater than the inner diameter of the second through hole, the insert will not pass through the second through hole after being installed, but abut against the connecting piece. In this way, after the screw is locked, the connecting piece can be pressed by the insert, so that the circuit board is fixed to the mounting seat. The locking force of the screw is borne by the connecting piece, thereby reducing the possibility of the circuit board being damaged.

[0016] In an embodiment of the present application, the power distribution device further comprises a switching device and a busbar, the switching device is fixed on the circuit board, the connecting piece is a metal piece and is electrically connected with the switching device; the busbar is fixed on the mounting seat and contacts the connecting piece, the busbar has a third through hole, the third through hole is located on the side of the second through hole away from the first through hole, and the screw passes through the third through hole.

[0017] The power distribution device can realize the distribution of current by controlling the on-off of the switching device, wherein the switching device can be electrically connected with the busbar through the connecting piece. In this case, the connecting piece is a metal piece (for example, a 2mm copper substrate), which can withstand a large locking force. Therefore, by taking the metal piece electrically connected with the switching device as the connecting piece, and then locking the connecting piece and the mounting seat by the screw, the circuit board can be fixed, and the connecting piece can be in contact with the busbar. Both the fixation of the circuit board and the contact connection of the connecting piece and the busbar are realized, and the possibility of the circuit board being damaged by pressure is reduced.

[0018] In an embodiment of the present application, the power distribution device further comprises a nut, the mounting seat has a mounting hole, the mounting hole is located on the side of the third through hole away from the second through hole, the nut is at least partially located in the mounting hole, the screw is threadedly connected with the nut, and the nut is fixed on the busbar or the mounting seat.

[0019] The nut cooperates with the screw and fixes the nut on the busbar or the mounting seat. When the screw is locked, the screw is threadedly connected with the nut and presses the connecting piece against the busbar, so that the connecting piece is in contact with the busbar, and the circuit board is fixed on the mounting seat. In addition, the mounting hole provides a mounting space for the nut, which is conducive to the installation of the nut.

[0020] In an embodiment of the present application, the material of the insert is metal.

[0021] The metal-made insert is conducive to batch production, can reduce production and processing costs, and has stronger locking force, which can better support the screw and reduce the possibility of damaging the circuit board by pressure. In addition, the metal insert has better electrical conductivity when electrical connection is required at the corresponding hole position of the circuit board.

[0022] In an embodiment of the present application, the insert is fixed on the circuit board.

[0023] Fixing the insert on the circuit board improves the integration of the insert and the circuit board, which is conducive to the installation and disassembly of the screw and reduces the possibility of misplacement or loss of the insert during assembly.

[0024] In an embodiment of the present application, the power distribution device further comprises a metal ring, the metal ring is fixed in the first through hole, and the part of the insert extending into the first through hole is located in the space surrounded by the metal ring.

[0025] The first through hole on the circuit board can be metalized by setting a metal ring, so as to increase the strength of the first through hole and reduce the possibility of damage to the circuit board caused by deformation of the first through hole.

[0026] In a second aspect, the application provides a charging device, comprising a power distribution device, a power conversion device and a plurality of charging interfaces, the power distribution device being electrically connected to the power conversion device and the plurality of charging interfaces, and the power distribution device being configured to distribute direct current output by the power conversion device to at least one charging interface.

[0027] The power distribution device can distribute the current from the power conversion device according to the needs of the charging interfaces. The charging device provided by the application comprises the power distribution device described above, so the charging device provided by the application and the power distribution device of the above technical solution can solve the same technical problems and have the same technical effects, which will not be described here.

[0028] In an embodiment of the application, the power distribution device further comprises a switching device and a busbar, the switching device is fixed on a circuit board, the connecting piece is a metal piece and is electrically connected to the switching device, and the busbar is fixed on the mounting seat and contacts the connecting piece, and the busbar is electrically connected to the output end of the power conversion device and / or the input end of the at least one charging interface.

[0029] The current output from the output end of the power conversion device passes through the corresponding busbar, connecting piece and switching device, and is delivered to the input end of the corresponding one or more charging interfaces. The on-off of the current is controlled by the switching device, and the current output by the power conversion device is distributed to the corresponding charging interface. BRIEF DESCRIPTION OF DRAWINGS

[0030] FIG. 1 is a schematic diagram of the overall structure of a charging device provided by an embodiment of the application;

[0031] FIG. 2 is a schematic diagram of the overall structure of another charging device provided by an embodiment of the application;

[0032] FIG. 3 is a schematic diagram of the overall structure of a power distribution device provided by an embodiment of the application;

[0033] FIG. 4 is a partial exploded view of a power distribution device provided by an embodiment of the application;

[0034] FIG. 5 is a schematic diagram of the structure of a busbar provided by an embodiment of the application;

[0035] FIG. 6 is a schematic diagram of the structure of a connecting piece provided by an embodiment of the application;

[0036] FIG. 7 is a topology diagram of a charging device provided by an embodiment of the application;

[0037] Fig. 8 is a partial topological view of a charging device according to an embodiment of the present application;

[0038] Fig. 9 is an enlarged view of A in Fig. 6;

[0039] Fig. 10 is a structural schematic view of an insert according to an embodiment of the present application;

[0040] Fig. 11 is a structural schematic view of another insert according to an embodiment of the present application;

[0041] Fig. 12 is a partial structural schematic view of another power distribution device according to an embodiment of the present application;

[0042] Fig. 13 is a structural schematic view of a metal ring according to an embodiment of the present application.

[0043] Fig. 13 is a structural schematic view of a metal ring according to an embodiment of the present application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them.

[0045] In the present application, the terms "first", "second", etc. are used only for the purpose of description and are intended to distinguish one element from another, and cannot be understood as indicating or implying relative importance or implicitly indicating 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.

[0046] In the present application, unless otherwise explicitly specified and limited, the meaning of "multiple" is two or more.

[0047] 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 solution described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is intended to present relevant concepts in a concrete manner.

[0048] 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.

[0049] The charging device 100 can be a charging pile, for example, an integrated charging pile. FIG. 1 exemplarily shows a structure of a charging device 100 (an integrated charging pile). Referring to FIG. 1, the charging device 100 includes a device cabinet 101 and at least one charging gun 102 (for example, FIG. 1 shows multiple charging guns 102). When the charging gun 102 is not performing charging, it can be plugged on the device cabinet 101 for personnel to take at any time. For another example, the charging device 100 can also be a split charging pile. FIG. 2 exemplarily shows a structure of a charging device 100 (a split charging pile). Referring to FIG. 2, the charging device 100 includes a charging host 103, at least one charging terminal 104 (for example, FIG. 2 shows multiple charging terminals 104) and at least one charging gun 102 (for example, FIG. 2 shows multiple charging guns 102). 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, the charging gun 102 can be plugged on the corresponding charging terminal 104 for personnel to take from the charging terminal 104.

[0050] In addition, referring to FIGS. 1 and 2, the charging device 100 further includes a power conversion device 105, a power distribution device 106 and multiple charging interfaces 107. For example, in the example that the charging device 100 is an integrated charging pile, referring to FIG. 1, the power conversion device 105, the power distribution device 106 and the multiple charging interfaces 107 can be all arranged in the device cabinet 101. Each charging interface 107 can be electrically connected to the corresponding charging gun 102 through a cable 108. For another example, in the example that the charging device 100 includes the charging host 103 and at least one charging terminal 104, referring to FIG. 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 the cable 108.

[0051] The input end of the power conversion device 105 is configured to receive alternating current, and the output end of the power conversion device 105 is configured to output direct current. For example, referring to FIGS. 1 and 2, the power conversion device 105 can include 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 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 end of the plurality of charging interfaces 107. The power distribution device 106 is configured to distribute the direct current output by the power conversion device 105 to at least one charging interface 107, and to cause the output end of the charging interface 107 to output direct current, so as to charge a device (for example, an electric vehicle) to be charged through the charging gun 102. In some other examples, the power conversion device 105 can include a plurality of AC-DC modules, and no DC-DC module is provided.

[0052] It should be noted that the charging apparatus 100 shown in FIGS. 1 and 2 is only an example of the two charging apparatuses 100 provided in the present application, and is not a limitation on the charging apparatus 100 of the present application.

[0053] FIG. 3 shows an example of a power distribution device 106. Referring to FIG. 3, the power distribution device 106 includes a protective cover 1 and a mounting seat 2. The protective cover 1 can be arranged on the mounting seat 2. The protective cover 1 and the mounting seat 2 can be any suitable structure, and a space for installing internal devices and apparatuses is formed between the protective cover 1 and the mounting seat 2. The protective cover 1 and the mounting seat 2 can be fixedly installed in a detachable manner. For example, the protective cover 1 and the mounting seat 2 are fixed by bolts or screws. By removing the bolts or screws, the protective cover 1 can be removed from the mounting seat 2. For another example, the protective cover 1 and the mounting seat 2 can be fixed by clamping (detachable clamping).

[0054] In some other examples, the protective cover 1 and the mounting seat 2 can be integrally connected (devices or apparatuses are installed in the space formed between the protective cover 1 and the mounting seat 2 through an opening), or fixed in other non-detachable manners. The present application does not make a specific limitation in this regard.

[0055] The material of the protective cover 1 and the material of the mounting seat 2 can be set as needed. For example, the material of the protective cover 1 and the material of the mounting seat 2 are both plastic. The present application does not make a specific limitation in this regard.

[0056] Figure 4 shows a partial exploded view of the power distribution device 106 to illustrate the internal structure of the power distribution device 106, wherein the power distribution device 106 further comprises a printed circuit board 3 (PCB), a plurality of switching devices 7 and a plurality of screws 5. The switching devices 7 can be any devices for controlling the on-off of current, such as relays, contactors, etc., and the plurality of switching devices 7 are fixed on the printed circuit board 3. The power distribution device 106 can control the distribution of current by controlling the on-off of the plurality of switching devices 7. The printed circuit board 3 is fixed on the mounting base 2 by the plurality of screws 5, wherein the screws 5 pass through the printed circuit board 3 and are threadedly connected with the mounting base 2.

[0057] In addition, the power distribution device 106 further comprises one or more connecting plates 4 and one or more busbars 8. Figure 5 shows a structure of the busbar 8, and Figure 6 shows a structure of the connecting plate 4. Referring to Figure 5, the busbar 8 is used for external wiring, for example, the busbar 8 can be a copper busbar (or an aluminum busbar, etc.), and each busbar 8 is fixed on the mounting base 2. Referring to Figure 6, each connecting plate 4 is fixed on the surface of one side of the printed circuit board 3, for example, the connecting plate 4 is fixed on the surface of the printed circuit board 3 facing the busbar 8. The connecting plate 4 can be a metal plate, for example, a 2mm copper plate or other conductive plate, and each connecting plate 4 is used for electrically connecting at least one switching device 7.

[0058] It can be understood that when the busbar 8 is fixed on the mounting base 2, there is no relative displacement between the busbar 8 and the mounting base 2, and similarly, when the connecting plate 4 is fixed on the printed circuit board 3, there is no relative displacement between the connecting plate 4 and the printed circuit board 3. In order to realize the electrical connection between the busbar 8 and the corresponding switching device 7 (one or more), after the printed circuit board 3 is locked by the screws 5, each busbar 8 is in contact with the corresponding connecting plate 4, and thus is electrically connected with the switching device 7 (one or more) corresponding to the connecting plate 4.

[0059] In the charging device 100, each busbar 8 is electrically connected with the output end of the power conversion device 105 and the input end of the corresponding one or more charging interfaces 107. Figure 7 shows a topology diagram of the charging device 100. Referring to Figure 7, the current output from the output end of the power conversion device 105 passes through the corresponding busbar 8, connecting plate 4 and switching device 7, and is then transmitted to the input end of the corresponding one or more charging interfaces 107. The busbar 8 can be one metal bar or a plurality of metal bars fixed together, for example, the busbar 8 comprises at least two metal bars, one of which is electrically connected with the output end of the power conversion device 105, and the other of which is electrically connected with the input end of the charging interface 107.

[0060] Fig. 8 is a part of the topology of the charging device 100 in Fig. 7, taking the local structure of the charging device 100 shown in Fig. 8 as an example, the power conversion apparatus 105 comprises an AC-DC module a and an AC-DC module b. One busbar 8 (busbar a) comprises a fixedly connected metal strip a1 and a metal strip a2, the metal strip a1 is electrically connected to the output (positive electrode) of the AC-DC module a, and the metal strip a2 is electrically connected to the input (positive electrode) of one charging interface 107 (charging interface a). Another busbar 8 (busbar b) comprises a fixedly connected metal strip b1 and a metal strip b2, the metal strip b1 is electrically connected to the output (negative electrode) of the AC-DC module a, and the metal strip b2 is electrically connected to the input (negative electrode) of the charging interface a. Still another busbar 8 (busbar c) comprises a fixedly connected metal strip c1 and a metal strip c2, the metal strip c1 is electrically connected to the output (positive electrode) of the AC-DC module b, and the metal strip c2 is electrically connected to the input (positive electrode) of another charging interface 107 (charging interface b). Still another busbar 8 (busbar d) comprises a fixedly connected metal strip d1 and a metal strip d2, the metal strip d1 is electrically connected to the output (negative electrode) of the AC-DC module d, and the metal strip d2 is electrically connected to the input (negative electrode) of the charging interface b.

[0061] Referring to Fig. 8, the switching device 7 (switching device a) can control the on-off of the two connection pieces 4 (connection piece a and connection piece c) electrically connected thereto, and the two connection pieces 4 are respectively in contact with one busbar 8 (busbar a and busbar c), that is, the connection piece a realizes contact with the busbar a by contacting the metal strip a1, the connection piece c realizes contact with the busbar c by contacting the metal strip c1, and the switching device a can control the on-off of the circuit between the busbar a and the busbar c.

[0062] The current output from the AC-DC module a can be directly delivered to the positive electrode of the charging interface a through the busbar a, and the current output from the positive electrode of the AC-DC module b can be directly delivered to the positive electrode of the charging interface b through the busbar c. When the charging interface b needs to call the current of the AC-DC module a, the current output from the positive electrode of the AC-DC module a can be delivered to the switching device a through the metal strip a1 and the connection piece a, the switching device a turns on the connection piece a and the connection piece c, that is, the switching device a turns on the metal strip a1 and the metal strip c1. The current on the metal strip a1 is delivered to the metal strip c1 through the switching device a, and then delivered to the positive electrode of the charging interface b through the metal strip c2, so that the current input to the positive electrode of the charging interface b includes the current from the positive electrode of the AC-DC module b and the current from the positive electrode of the AC-DC module a.

[0063] In order to form the loop, the busbar b and the busbar d contact the corresponding connecting piece 4 (the connecting piece b and the connecting piece d), the connecting piece b and the connecting piece d are electrically connected to the corresponding switching device 7 (the switching device a or other switching device 7), and the switching device a can control the on-off of the circuit between the connecting piece b and the connecting piece d. For example, the current delivered from the positive pole of the AC-DC module a to the positive pole of the charging interface a flows through the negative pole of the charging interface a and the busbar b to return to the negative pole of the AC-DC module a. For another example, the current delivered from the positive pole of the AC-DC module b to the positive pole of the charging interface b flows through the negative pole of the charging interface b and the busbar d to return to the negative pole of the AC-DC module b. For another example, the current delivered from the positive pole of the AC-DC module a to the positive pole of the charging interface b flows through the negative pole of the charging interface b, the metal bar d2, the metal bar d1, the switching device a and the metal bar b1 to return to the negative pole of the AC-DC module a.

[0064] In some other examples, the positive pole and the negative pole of the output end of the power conversion device 105 are respectively connected to one busbar 8, the positive pole and the negative pole of the input end of each charging interface 107 are respectively connected to one busbar 8, the busbar 8 connected to the output end of the power conversion device 105 contacts the corresponding connecting piece 4, and the busbar 8 connected to the input end of each charging interface 107 contacts the corresponding connecting piece 4. That is, the busbar 8 connected to the output end of the power conversion device 105 is not directly connected or contacted to the busbar 8 connected to the input end of the charging interface 107, and the current output from the power conversion device 105 needs to pass through the power distribution device 106 to be delivered to the designated charging interface 107.

[0065] Therefore, the connecting piece 4 needs to be stably contacted to the corresponding busbar 8 by locking the circuit board 3 and the mounting seat 2 by the screw 5. If the locking force is directly applied to the circuit board 3 after the locking of the circuit board 3 and the mounting seat 2 by the screw 5, the circuit board 3 will be damaged, which affects the normal use of the circuit board 3.

[0066] Therefore, in the present application, the connecting piece 4 is used to bear the locking force of the screw 5 to reduce the possibility of damage to the circuit board 3. Specifically, FIG. 9 is an enlarged view of A in FIG. 6, referring to FIG. 9, the power distribution device 106 further comprises an insert 6, the circuit board 3 has a first through hole 31, the connecting piece 4 has a second through hole 41 in communication with the first through hole 31, the aperture of the first through hole 31 is larger than the aperture of the second through hole 41, a part of the insert 6 is located in the first through hole 31 and abuts against the connecting piece 4, another part of the insert 6 is located outside the first through hole 31 (the side of the first through hole 31 away from the second through hole 41), and the busbar 8 has a third through hole 81 located on the side of the second through hole 41 away from the first through hole 31.

[0067] Referring to FIG. 9, the screw 5 passes through the insert 6, the first through hole 31, the second through hole 41, and the third through hole 81, and is screwed with the mounting base 2. The screw 5 can be a bolt (including but not limited to a combined bolt and a single bolt that is not combined) or a screw (including but not limited to a combined screw and a single screw that is not combined). It can be understood that the screw 5 includes a head 51 and a rod 52 (a screw rod portion), the rod 52 of the screw 5 is threaded to achieve threaded connection with other structures, and the head 51 of the screw 5 protrudes radially outward from the rod 52. When the screw 5 is a combined screw (for example, a combined bolt or a combined screw), the head 51 of the screw 5 of the present application includes the head of a single screw in the combined screw and a gasket in the combined screw.

[0068] Referring to FIG. 9, the head 51 of the screw 5 is located on the side of the circuit board 3 away from the connecting piece 4. The part of the insert 6 located in the first through hole 31 abuts against the connecting piece 4, and the part of the insert 6 located outside the first through hole 31 abuts against the head 51 of the screw 5 (for example, abuts against the gasket included in the head 51 of the combined screw). When the screw 5 is locked, it abuts against the insert 6, and then abuts against the connecting piece 4 through the insert 6, so that the connecting piece 4 and the busbar 8 are clamped between the insert 6 and the mounting base 2. In this way, the screw 5 can not directly abut against the circuit board 3, but can fix the circuit board 3 through the clamping of the connecting piece 4 by the insert 6 and the mounting base 2. This can not only fix the circuit board 3, but also make the connecting piece 4 and the busbar 8 contact, and can also reduce the possibility of the circuit board 3 being directly crushed by the screw 5.

[0069] The present application does not specifically limit the aperture of the third through hole 81. For example, the aperture of the third through hole 81 can be larger than the through hole of the second through hole 41. For another example, the aperture of the third through hole 81 can also be smaller than or equal to the through hole of the second through hole 41.

[0070] Regarding the structure of the insert 6, in some examples, FIG. 10 exemplarily shows a structure of the insert 6. Referring to FIGS. 9 and 10, the insert 6 can include a fixedly connected (for example, integrally provided) embedded portion 61 and a flange portion 62, the flange portion 62 protrudes radially outward from the embedded portion 61. For example, the embedded portion 61 is annular, the flange portion 62 is also annular, and the outer diameter of the flange portion 62 is larger than the outer diameter of the embedded portion 61, and the flange portion 62 is sleeved and fixed on the outside of the embedded portion 61.

[0071] Referring to FIG. 9 and FIG. 10, after the insert 6 is installed, the embedded portion 61 extends into the first through hole 31, the flange portion 62 is located outside the first through hole 31, and there is a gap between the flange portion 62 and the circuit board 3. After the locking screw 5 is installed, the flange portion 62 abuts against the head 51 of the screw 5, and the flange portion 62 does not abut against the circuit board 3, so the circuit board 3 does not directly bear the pressure of the screw 5, and the possibility of the circuit board 3 being crushed is reduced. In addition, the insert 6 with different diameters is used, so that there is a larger contact area between the insert 6 and the head 51 of the screw 5. During the locking of the screw 5, the flange portion 62 can bear more stress, and in addition, the friction between the head 51 of the screw 5 and the insert 6 can be increased, so that the possibility of the screw 5 loosening after being locked is reduced.

[0072] In addition, in the case where the flange portion 62 is annular, in some examples, the diameter of the flange portion 62 can also be greater than the diameter of the head 51 of the screw 5. Among them, the diameter of the head 51 can be the diameter (or the maximum diagonal length) of the flat surface of the head 51 of the screw 5 for contacting the insert 6, so that the contact area between the flange portion 62 and the screw 5 is larger, and the friction between the two is further increased, so that the screw 5 is not easy to loosen after being locked.

[0073] In other examples, the flange portion 62 can not be annular, for example, the flange portion 62 can be cam-shaped and protrude towards one side of the embedded portion 61, or the flange portion 62 is profiled (for example, irregularly shaped), as long as the flange portion 62 protrudes towards the outside of the embedded portion 61. It should be noted that regardless of the structure of the flange portion 62, after the screw 5 is locked, there is a gap between the flange portion 62 and the circuit board 3, that is, the flange portion 62 does not exert pressure on the circuit board 3.

[0074] It should be noted that the size of the gap between the flange portion 62 and the circuit board 3 is not specifically limited in the present application, which can be 0.1 mm, 1 mm, 3 mm, etc.

[0075] Regarding the structure of the insert 6, in some other examples, the insert 6 is annular, for example, another structure of the insert 6 is exemplarily shown in FIG. 11. Referring to FIG. 11, in the axial direction of the insert 6, the outer diameter of the insert 6 is equal (in addition, the inner diameter of the insert 6 can also be equal), the outer diameter of the insert 6 is smaller than the inner diameter of the first through hole 31 and larger than the inner diameter of the second through hole 41, that is, in this example, an equal-diameter insert 6 is adopted. After the insert 6 is installed, the outer diameter of the insert 6 is smaller than the inner diameter of the first through hole 31, so the insert 6 can be installed in the first through hole 31, and because the outer diameter of the insert 6 is larger than the inner diameter of the second through hole 41, the insert 6 will not pass through the second through hole 41 after installation, but abut against the connecting piece 4. In this way, after the locking screw 5 is locked, the connecting piece 4 can be pressed by the insert 6 to fix the circuit board 3 on the mounting seat 2, and the locking force of the screw 5 is borne by the connecting piece 4, which reduces the possibility of damage to the circuit board 3.

[0076] In the example shown in FIG. 11, the diameter of the head 51 of the screw 5 can be larger than the diameter of the insert 6, or the diameter of the head 51 of the screw 5 can be equal to or smaller than the diameter of the insert 6, which is not specifically limited in the present application.

[0077] In addition, in some other examples, the insert 6 can also be semi-annular or special-shaped, as long as it can support the screw 5.

[0078] Regarding the threaded connection manner of the screw 5 and the mounting seat 2, in one example, referring back to FIG. 9, the power distribution device 106 further includes a nut 9, the mounting seat 2 has a mounting hole 21, for example, the mounting seat 2 has a boss (one or more, the number of bosses is the same as the number of corresponding busbars 8) for supporting the busbar 8, and the mounting hole 21 is formed on the boss. The mounting hole 21 is located on the side of the third through hole 81 away from the second through hole 41, the nut 9 is at least partially located in the mounting hole 21, the nut 9 is fixed (for example, by press riveting, welding or the like) on the busbar 8, and the screw 5 is threadedly connected with the nut 9.

[0079] In some other examples, for example, referring to FIG. 11, the nut 9 can also be fixed on the mounting seat 2. Alternatively, in some other examples, a threaded hole is formed on the mounting seat 2, and the screw 5 is directly threadedly connected with the threaded hole on the mounting seat 2, and in this example, the nut 9 can not be separately provided.

[0080] Among them, the nut 9 of the present application refers to a structure provided with a threaded hole, for example, the nut 9 of the present application can be a hexagonal nut, and the nut 9 of the present application can also be a structure formed by forming a threaded hole on a cylinder or a disc.

[0081] In some other examples, the connecting piece 4 can not serve as a structure for electrically connecting the switch device 7, that is, the connecting piece 4 can only serve as a structure for clamping the insert 6 and the mounting base 2. For example, FIG. 12 schematically shows a partial structure of another power distribution device 106. Referring to FIG. 12, the connecting piece 4 is arranged on a board surface of one side of the circuit board 3. The circuit board 3 has a first through hole 31, and the connecting piece 4 has a second through hole 41 that is in communication with the first through hole 31. The first through hole 31 has a larger hole diameter than the second through hole 41. A portion of the insert 6 is located in the first through hole 31 and abuts against the connecting piece 4, and another portion of the insert 6 is located outside the first through hole 31 and abuts against the head 51 of the screw 5. The locked screw 5 abuts against the insert 6, and then abuts against the connecting piece 4 through the insert 6. The connecting piece 4 abuts against the mounting base 2 (the connecting piece 4 in this example can not be in contact with the busbar 8, and thus the busbar 8 can not be arranged between the connecting piece 4 and the mounting base 2). The connecting piece 4 is clamped between the insert 6 and the mounting base 2, and the circuit board 3 is fixed by clamping the connecting piece 4. The screw 5 does not directly apply locking force to the board surface of the circuit board 3, and the possibility of damaging the circuit board 3 in the process of fixing the circuit board 3 by the screw 5 is reduced.

[0082] In the example shown in FIG. 12, the connecting piece 4 does not serve as a structure for electrically connecting the switch device 7 and the busbar 8. Therefore, the connecting piece 4 can be a metal piece, and the connecting piece 4 can also be a non-metal piece, for example, the connecting piece 4 can be made of plastic, rubber, etc. In addition, the insert 6 in this example can also be any structure that can achieve its function, for example, the insert 6 can include an embedded portion 61 and a flange portion 62 (in the case of the insert 6 not having different diameters), and for another example, the insert 6 can be a cylindrical structure with the same diameter, and the like, which will not be described herein again.

[0083] In some other examples, the power distribution device 106 can include a plurality of screws 5 and connecting pieces 4 corresponding to the plurality of screws 5. Each connecting piece 4 is fixed on the circuit board 3. Some of the connecting pieces 4 are used for electrically connecting the switch device 7 and are in contact with the busbar 8 (for example, the case shown in FIG. 9), and such connecting pieces 4 can support the insert 6 to reduce the possibility of the insert 6 damaging the circuit board 3 after the screw 5 is locked. Some of the connecting pieces 4 are not electrically connected to the switch device 7 and the busbar 8, and only serve as a support structure for the insert 6 (for example, the case shown in FIG. 12), to reduce the possibility of the insert 6 damaging the circuit board 3 after the screw 5 is locked.

[0084] In the case where the power distribution device 106 includes a plurality of screws 5, each screw 5 can be arranged one-to-one with a connecting piece 4 (one connecting piece 4 is provided with one second through hole 41), and a plurality of screws 5 can be arranged corresponding to one connecting piece 4 (one connecting piece 4 is provided with a plurality of second through holes 41), which will not be specifically limited herein.

[0085] In some examples, the embedded part 6 and the connecting piece 4 are arranged at all positions where the screw 5 is arranged on the circuit board 3, and the first through hole 31 on the circuit board 3 has a larger hole diameter than the second through hole 41 on the connecting piece 4; in other examples, the embedded part 6 and the connecting piece 4 are arranged only at a part of positions where the screw 5 is arranged on the circuit board 3; in other examples, the embedded part 6 and the connecting piece 4 are arranged only at one position where the screw 5 is arranged on the circuit board 3.

[0086] The material of the embedded part 6 can be set according to requirements. For example, when the corresponding hole position of the circuit board 3 needs to realize electrical connection, the material of the embedded part 6 is metal, and the metal embedded part 6 has better electrical conductivity. For another example, when the corresponding hole position of the circuit board 3 does not need to realize electrical connection, the material of the embedded part 6 can be non-metal. Alternatively, in some examples, when the corresponding hole position of the circuit board 3 does not need to realize electrical connection, the material of the embedded part 6 can also be metal. The metal embedded part 6 can reduce production and processing costs by using mass production (the plastic embedded part 6 needs additional mold opening), and the metal embedded part 6 has stronger locking force and can better support the screw 5, thereby reducing the possibility of damaging the circuit board 3.

[0087] In addition, in some examples, the embedded part 6 can be fixed on the circuit board 3. For example, the embedded part 6 can be fixed in the corresponding first through hole 31 by riveting, bonding, welding or clamping, etc., to realize the fixation between the embedded part 6 and the circuit board 3 (when the circuit board 3 moves, the embedded part 6 moves with the circuit board 3), thereby improving the integration of the embedded part 6 and the circuit board 3, facilitating the installation and disassembly of the screw 5, and reducing the possibility of misplacement or loss of the embedded part 6 during assembly.

[0088] In some examples, the power distribution device 106 further comprises a metal ring 10. FIG. 13 exemplarily shows a structure of the metal ring 10. The metal ring 10 is fixed in the first through hole 31, that is, the first through hole 31 on the circuit board 3 is metalized by arranging the metal ring 10, so as to increase the strength of the first through hole 31 and reduce the possibility of deformation of the first through hole 31 and damage to the circuit board 3. The part of the embedded part 6 extending into the first through hole 31 is located in the space surrounded by the metal ring 10. When the screw 5 is installed, the screw 5 passes through the embedded part 6 and also passes through the metal ring 10.

[0089] In examples in which the metal ring 10 is arranged inside the first through hole 31, the metal ring 10 can be arranged in each first through hole 31, or a part (one or more) of the first through holes 31.

[0090] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present 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 base; a circuit board and a connecting piece, the connecting piece being fixed on one side of the circuit board, the circuit board having a first through hole, the connecting piece having a second through hole communicating with the first through hole, the first through hole having a larger diameter than the second through hole; an insert, a part of the insert being located in the first through hole and abutting against the connecting piece, another part of the insert being located outside the first through hole; a screw, the screw passing through the insert, the first through hole and the second through hole and being screwed with the mounting base, the head of the screw being located on the side of the circuit board away from the connecting piece and abutting against the part of the insert located outside the first through hole.

2. The power distribution apparatus of claim 1, wherein, The insert comprises a connecting embedded part and a flange part, the embedded part being located in the first through hole, the flange part being located outside the first through hole, the flange part protruding along the radial direction of the first through hole towards the outside of the embedded part, the flange part abutting against the head of the screw, and a gap being formed between the flange part and the circuit board.

3. The power distribution apparatus of claim 2, wherein, The flange part is annular, the outer diameter of the flange part being larger than the diameter of the plane of the head of the screw used for contacting the flange part.

4. The power distribution apparatus of claim 1, wherein, The insert is annular, the outer diameter of the insert being equal in the axial direction of the insert, the outer diameter of the insert being smaller than the inner diameter of the first through hole and larger than the inner diameter of the second through hole.

5. The power distribution apparatus of any one of claims 1-4, wherein, The power distribution device further comprises: a switching device, the switching device being fixed on the circuit board, the connecting piece being a metal piece and being electrically connected with the switching device; a busbar, the busbar being fixed on the mounting base and contacting the connecting piece, the busbar having a third through hole, the third through hole being located on the side of the second through hole away from the first through hole, the screw passing through the third through hole.

6. The power distribution apparatus of claim 5, wherein, The power distribution device further comprises a nut, the mounting base having a mounting hole, the mounting hole being located on the side of the third through hole away from the second through hole, the nut being at least partially located in the mounting hole, the screw being screwed with the nut, the nut being fixed on the busbar or the mounting base.

7. The power distribution apparatus of claim 1, wherein, The material of the insert is metal.

8. The power distribution apparatus of claim 1, wherein, The insert is fixed on the circuit board.

9. The power distribution apparatus of claim 1, wherein, The power distribution device further comprises a metal ring, the metal ring being fixed in the first through hole, the part of the insert extending into the first through hole being located in the space surrounded by the metal ring.

10. A charging device, characterized by The power distribution device, the power conversion device and a plurality of charging interfaces according to any one of claims 1-9 are included, the power distribution device being electrically connected with the power conversion device and the plurality of charging interfaces, the power distribution device being used for distributing the direct current output by the power conversion device to at least one of the charging interfaces.

11. The charging apparatus according to claim 10, characterized by, The power distribution device further comprises a switching device and a busbar, the switching device being fixed on the circuit board, the connecting piece being a metal piece and being electrically connected with the switching device, the busbar being fixed on the mounting base and contacting the connecting piece, the busbar being 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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