Power distribution device and charging equipment

Abstract

The embodiment of the utility model provides a power distribution device and charging equipment, which are used for distributing input current into at least one path and outputting, and relates to the technical field of energy, the power distribution device comprises 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 is provided with a first through hole, and the screw is arranged in the first through hole; the connecting piece is provided with a second through hole communicated with the first through hole, and the aperture of the first through hole is larger than that of the second through hole; one part of the insert is located in the first through hole and abuts against the connecting piece, the other part of the insert is located outside the first through hole, the screw penetrates through the insert, the first through hole and the second through hole and is in threaded connection with the mounting base, and the head of the screw is located on the side, away from the connecting piece, of the circuit board and abuts against the part, located outside the first through hole, of the insert.

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] As time goes by, the power requirements for circuit boards in equipment are getting higher and higher. This means that the size of power screws (such as bolts and screws) on circuit boards will increase, and the number of power screws will also increase. In addition, the specifications of the screws required to secure the circuit boards are also increasing.

[0003] In the related art, directly tightening large screws on a circuit board can easily cause the circuit board to crack, affecting the normal use of the circuit board. Utility Model Content

[0004] The present application provides a power distribution device and a charging device including the power distribution device, which can not only fix the circuit board by screws, but also reduce the possibility of the circuit board being directly damaged by the screws.

[0005] 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 current. The power distribution device includes a mounting seat, a circuit board, a connecting piece, a screw, and an insert. A connecting piece is fixed on a board surface on one side of the circuit board. The circuit board has a first through hole. The connecting piece has a second through hole connected to the first through hole. The aperture of the first through hole is larger than the aperture of the second through hole. A portion of the insert is located in the first through hole and abuts the connecting piece, and another portion 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 to the mounting seat. The head of the screw is located on the side of the circuit board away from the connecting piece and abuts the portion of the insert located outside the first through hole.

[0007] The power distribution device can be used in a variety of devices, such as charging equipment, to improve the utilization rate of the power module. When the circuit board needs to be fixed on the mounting base, 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 threadedly connected to the mounting base and locked, so that the circuit board can be fixed on the mounting base. Among them, the locked screw abuts the insert, and then the insert abuts the connecting piece, so that the connecting piece is clamped between the insert and the mounting base. In this way, the screw does not directly abut the circuit board, but the insert and the mounting base clamp the connecting piece to achieve the fixation of the circuit board. It can not only fix the circuit board, but also reduce the possibility of the circuit board being directly crushed by the screw.

[0008] In one embodiment of the present application, the insert includes an embedded portion and a flange portion that are connected, the embedded portion is located in the first through hole, the flange portion is located outside the first through hole, the flange portion protrudes toward the outside of the embedded portion along the radial direction of the first through hole, the flange portion abuts the head of the screw, and there is a gap between the flange portion and the circuit board.

[0009] Using inserts of unequal diameters creates a larger contact area between the insert and the screw head. During tightening, the flange shares more stress and increases friction between the screw head and the insert, reducing the likelihood of the screw loosening after tightening. Furthermore, a gap exists between the flange and the circuit board. After tightening, the flange does not abut the circuit board, protecting it from direct pressure from the screw and minimizing the risk of damage.

[0010] In one embodiment of the present application, the flange portion is annular, and the outer diameter of the flange portion is larger than the diameter of the plane of the screw head for contacting the flange portion.

[0011] The flange portion protrudes toward the outer periphery of the screw head, so that the contact area between the flange portion and the screw is larger, further increasing the friction between the two and making the screw less likely to loosen.

[0012] In one embodiment of the present application, the insert is annular, and the outer diameters of the insert are the same 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 larger than the inner diameter of the second through hole.

[0013] Using an insert of equal diameter, that is, a ring-shaped insert, after installation, the insert's diameter is smaller than the inner diameter of the first through-hole, allowing it to fit within the first through-hole. Furthermore, because the insert's diameter is larger than the inner diameter of the second through-hole, the insert does not pass through the second through-hole after installation, but instead abuts against the connecting piece. This allows the insert to press against the connecting piece after tightening the screw, securing the circuit board to the mounting base. The tightening force of the screw is absorbed by the connecting piece, reducing the possibility of damage to the circuit board.

[0014] In one embodiment of the present application, the power distribution device also includes a switching device and a busbar, the switching device is fixed on the circuit board, the connecting plate is a metal plate and is electrically connected to the switching device; the busbar is fixed on the mounting base and contacts the connecting plate, 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.

[0015] The power distribution device can distribute current by controlling the on and off of the switching devices, wherein the switching devices can be electrically connected to the busbar through the connecting piece. In this case, the connecting piece is a metal piece (for example, a 2mm copper substrate) that can withstand a large locking force. Therefore, the metal piece electrically connected to the switching device is used as a connecting piece, and the connecting piece and the mounting seat are screwed together to fix the circuit board and make the connecting piece contact with the busbar. This not only achieves the fixation of the circuit board and the mounting seat, but also achieves the contact connection between the connecting piece and the busbar, and also reduces the possibility of the circuit board being damaged by pressure.

[0016] In one embodiment of the present application, the power distribution device also includes a nut, the mounting base 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 to the nut, the nut is fixed on the busbar, or the nut is fixed on the mounting base.

[0017] The nut and screw work together to secure the nut to the busbar or mounting base. When the screw is tightened, it threads into the nut and presses the connector against the busbar, achieving contact and connection between the connector and the busbar, securing the circuit board to the mounting base. Furthermore, the mounting hole provides space for the nut, facilitating its placement.

[0018] In one embodiment of the present application, the insert is made of metal.

[0019] Metal inserts facilitate mass production, reducing production and processing costs. Metal also offers a greater ability to withstand tightening forces, providing better support for screws and reducing the likelihood of damaging the circuit board. Furthermore, metal inserts offer improved electrical conductivity when electrical connections need to be made between corresponding holes on the circuit board.

[0020] In one embodiment of the present application, the insert is fixed on the circuit board.

[0021] Fixing the insert on the circuit board improves the integration of the insert and the circuit board, facilitates the installation and removal of screws, and reduces the possibility of the insert being misplaced or lost during assembly.

[0022] In one embodiment of the present application, the power distribution device further includes a metal ring, which is fixed in the first through hole, and the portion of the insert extending into the first through hole is located in the space enclosed by the metal ring.

[0023] The first through hole on the circuit board can be metallized by providing a metal ring, thereby increasing the strength of the first through hole and reducing the possibility of deformation of the first through hole causing damage to the circuit board.

[0024] In a second aspect of the present application, a charging device is provided, which includes a power distribution device, a power conversion device and multiple charging interfaces. The power distribution device electrically connects the power conversion device and the multiple charging interfaces, and the power distribution device is used to distribute the direct current output by the power conversion device to at least one charging interface.

[0025] The power distribution device can distribute the current from the power conversion device according to the requirements of the charging interface. The charging device provided in this application includes the above-mentioned power distribution device. Therefore, the charging device provided in 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, and will not be described in detail here.

[0026] In one embodiment of the present application, the power distribution device also includes a switching device and a busbar, the switching device is fixed on the circuit board, the connecting plate is a metal plate and is electrically connected to the switching device, the busbar is fixed on the mounting base and contacts the connecting plate, and 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.

[0027] The current output from the power converter passes through the corresponding busbar, connector, and switch components, and is delivered to the input of one or more corresponding charging ports. The switch components control the on / off of the current, distributing the current output from the power converter to the corresponding charging ports. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the overall structure of a charging device provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the overall structure of another charging device provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of the overall structure of a power distribution device provided in an embodiment of the present application;

[0031] Figure 4 A partial exploded view of a power distribution device provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the structure of a busbar provided in an embodiment of the present application;

[0033] Figure 6 A schematic structural diagram of a connecting piece provided in an embodiment of the present application;

[0034] Figure 7 A topological diagram of a charging device provided in an embodiment of the present application;

[0035] Figure 8A local topology diagram of a charging device provided in an embodiment of the present application;

[0036] Figure 9 for Figure 6 Magnified view at point A in the middle;

[0037] Figure 10 A schematic structural diagram of an insert provided in an embodiment of the present application;

[0038] Figure 11 A schematic structural diagram of another insert provided in an embodiment of the present application;

[0039] Figure 12 A schematic diagram of a partial structure of another power distribution device provided in an embodiment of the present application;

[0040] Figure 13 A schematic structural diagram of a metal ring provided in an embodiment of the present application.

[0041] Reference numerals:

[0042] 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;

[0043] 1-protective cover; 2-mounting base; 21-mounting hole; 3-circuit board; 31-first through hole; 4-connecting piece; 41-second through hole; 5-screw; 51-head; 52-rod; 6-insert; 61-embedded part; 62-flange part; 7-switching device; 8-busbar; 81-third through hole; 9-nut; 10-metal ring. DETAILED DESCRIPTION

[0044] 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.

[0045] In this application, the terms "first," "second," etc., are used solely for descriptive purposes to distinguish one element from another and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of the features.

[0046] In this application, unless otherwise clearly defined or specified, “multiple” means two or more.

[0047] Furthermore, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0048] In the drawings of the embodiments of the present application, physical 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.

[0049] The embodiment of the present application 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 Multiple charging guns 102 are shown. When the charging guns 102 are not charging, they can be plugged into the equipment cabinet 101 for personnel to use at any time. For another example, the charging device 100 can also be a split charging pile. Figure 2 The structure of a charging device 100 (split charging pile) is shown as an example. Figure 2 The charging device 100 includes a charging host 103 and at least one charging terminal 104 (e.g., Figure 2 A plurality of charging terminals 104 are shown) and at least one charging gun 102 (eg, Figure 2 Multiple charging guns 102 are shown, wherein each charging terminal 104 is electrically connected to the charging host 103, and each charging terminal 104 corresponds to one or more charging guns 102. When the charging gun 102 is not performing charging operations, the charging gun 102 can be plugged into the corresponding charging terminal 104 for personnel to use from the charging terminal 104.

[0050] In addition, refer to Figure 1 and Figure 2 The 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, Figure 1 , the power conversion device 105, the power distribution device 106 and the plurality of charging interfaces 107 can be all arranged in the equipment cabinet 101, and each charging interface 107 can be electrically connected to a corresponding charging gun 102 via 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 2The power conversion device 105 and the power distribution device 106 can be set in the charging host 103, and the charging interface 107 can be set 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.

[0051] 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 DC power output by the power conversion device 105 to at least one charging interface 107, and to enable the output end of the charging interface 107 to output DC power, thereby charging the device to be charged (e.g., an electric vehicle) through the charging gun 102. In some other examples, the power conversion device 105 may include multiple AC-DC modules instead of a DC-DC module.

[0052] 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 this application and are not intended to limit the charging devices 100 of this application.

[0053] Figure 3 An exemplary power distribution device 106 is shown, referring to Figure 3 The power distribution device 106 includes a protective cover 1 and a mounting base 2, wherein the protective cover 1 can be mounted on the mounting base 2. The protective cover 1 and the mounting base 2 can be of any suitable structure, and a space is enclosed between the protective cover 1 and the mounting base 2 for mounting internal components and devices. The protective cover 1 and the mounting base 2 can be fixedly mounted in a detachable manner. For example, the protective cover 1 and the mounting base 2 are fixed by bolts or screws. By removing the bolts or screws, the protective cover 1 can be removed from the mounting base 2. For another example, the protective cover 1 and the mounting base 2 can be fixed by a snap connection (detachable snap connection).

[0054] In some other examples, the protective cover 1 and the mounting base 2 may also be integrally connected (the device or apparatus is mounted in the space enclosed by the two through an opening), or fixed in other non-detachable ways, and this application does not impose any specific restrictions on this.

[0055] The material of the protective cover 1 and the material of the mounting base 2 can be set as needed. For example, the material of the protective cover 1 and the material of the mounting base 2 are both plastic, and this application does not impose any specific restrictions on this.

[0056] Figure 4 A partial exploded view of a power distribution device 106 is shown as an example to illustrate the internal structure of the power distribution device 106, wherein the power distribution device 106 also includes a printed circuit board 3 (PCB), multiple switching devices 7, and multiple screws 5. The switching devices 7 can be any device for controlling the on and off of current, such as relays and contactors. The multiple switching devices 7 are fixed to the PCB 3. The power distribution device 106 can achieve current distribution by controlling the on and off of the multiple switching devices 7. The PCB 3 is fixed to the mounting base 2 by multiple screws 5, wherein the screws 5 pass through the PCB 3 and are threadedly connected to the mounting base 2.

[0057] In addition, the power distribution device 106 further includes connecting pieces 4 (one or more) and busbars 8 (one or more), Figure 5 The structure of a busbar 8 is shown as an example. Figure 6 The structure of a connecting piece 4 is shown as an example. Figure 5 , the busbar 8 is used for external wiring, for example, the busbar 8 can be a wiring copper bar (or a wiring aluminum bar or other conductive metal bar), each busbar 8 is fixed on the mounting base 2; Figure 6 Each connecting piece 4 is fixed on one side of the circuit board 3. For example, the connecting piece 4 is fixed on the surface of the circuit board 3 facing the busbar 8. The connecting piece 4 can be a metal sheet, for example, a 2mm copper substrate or other conductive sheet. Each connecting piece 4 is used to electrically connect at least one switching device 7.

[0058] The present application does not impose any specific restrictions on the manner in which the busbar 8 is fixed to the mounting base 2, or the manner in which the connecting piece 4 is fixed to the circuit board 3. It is understood that when the busbar 8 is fixed to the mounting base 2, there is no relative displacement between the two. Similarly, when the connecting piece 4 is fixed to the circuit board 3, there is no relative displacement between the two. In order to achieve electrical connection between the busbar 8 and the corresponding switching device 7 (one or more), after the screw 5 is tightened to the circuit board 3, each busbar 8 is in contact with and connected to the corresponding connecting piece 4, thereby electrically connecting to the switching device 7 (one or more) corresponding to the connecting piece 4.

[0059] In the charging device 100 , each busbar 8 is electrically connected to the output end of the power conversion device 105 and the input end of one or more corresponding charging interfaces 107 . Figure 7 An exemplary topology diagram of a charging device 100 is shown. Figure 7The current output from the output of the power conversion device 105 passes through the corresponding busbar 8, connector 4, and switch device 7, and is delivered to the input of one or more corresponding charging interfaces 107. The busbar 8 can be a single metal busbar or a plurality of metal busbars fixed together. For example, the busbar 8 includes at least two metal busbars, one of which is electrically connected to the output of the power conversion device 105, and the other is electrically connected to the input of the charging interface 107.

[0060] Figure 8 for Figure 7 Part of the charging device 100 topology, Figure 8 Taking the partial structure of the charging device 100 shown in the figure as an example, the power conversion device 105 includes an AC-DC module a and an AC-DC module b. One of the busbars 8 (busbar a) includes a fixedly connected metal bar a1 and a metal bar a2. The metal bar a1 is electrically connected to the output terminal (positive pole) of the AC-DC module a, and the metal bar a2 is electrically connected to the input terminal (positive pole) of a charging interface 107 (charging interface a). Another busbar 8 (busbar b) includes a fixedly connected metal bar b1 and a metal bar b2. The metal bar b1 is electrically connected to the output terminal (negative pole) of the AC-DC module a, and the metal bar b2 is electrically connected to the input terminal (negative pole) of the charging interface a. Another busbar 8 (busbar c) includes a fixedly connected metal bar c1 and a metal bar c2. The metal bar c1 is electrically connected to the output terminal (positive pole) of the AC-DC module b, and the metal bar c2 is electrically connected to the input terminal (positive pole) of another charging interface 107 (charging interface b). Another busbar 8 (busbar d) includes a fixedly connected metal busbar d1 and a metal busbar d2. The metal busbar d1 is electrically connected to the output end (negative pole) of the AC-DC module d, and the metal busbar d2 is electrically connected to the input end (negative pole) of the charging interface b.

[0061] Reference Figure 8 The switching device 7 (switching device a) can control the on and off of two connecting pieces 4 (connecting piece a and connecting piece c) electrically connected to it. The above two connecting pieces 4 each contact a busbar 8 (busbar a and busbar c), that is, connecting piece a contacts with busbar a by contacting metal bar a1, and connecting piece c contacts with busbar c by contacting metal bar c1. The switching device a can control the on and off of the circuit between busbar a and busbar c.

[0062] The current output from AC-DC module a can be directly transmitted to the positive terminal of charging interface a through busbar a, and the current output from the positive terminal of AC-DC module b can be directly transmitted to the positive terminal of charging interface b through busbar c. When charging interface b needs to call the current of AC-DC module a, the current output from the positive terminal of AC-DC module a can be transmitted to switching device a through metal bus a1 and connecting piece a. Switching device a conducts connecting piece a and connecting piece c, that is, switching device a conducts metal bus a1 and metal bus c1. The current on metal bus a1 is transmitted to metal bus c1 through switching device a, and then transmitted to the positive terminal of charging interface b through metal bus c2. In this way, the current input to the positive terminal of charging interface b includes both the current from the positive terminal of AC-DC module b and the current from the positive terminal of AC-DC module a.

[0063] To form a circuit, busbars b and d contact corresponding connectors 4 (connector b and connector d), which are electrically connected to corresponding switching devices 7 (switch device a or another switching device 7). Switch device a can control the on / off state of the circuit between connectors b and d. For example, current transmitted from the positive electrode of AC-DC module a to the positive electrode of charging interface a flows through the negative electrode of charging interface a and busbar b, returning to the negative electrode of AC-DC module a. For another example, current transmitted from the positive electrode of AC-DC module b to the positive electrode of charging interface b flows through the negative electrode of charging interface b and busbar d, returning to the negative electrode of AC-DC module b. For another example, current transmitted from the positive electrode of AC-DC module a to the positive electrode of charging interface b flows through the negative electrode of charging interface b, metal busbar d2, metal busbar d1, switch device a, and metal busbar b1, returning to the negative electrode of AC-DC module a.

[0064] In other examples, the positive and negative poles at the output of the power conversion device 105 are each connected to a busbar 8, and the positive and negative poles at the input of each charging interface 107 are each connected to a busbar 8. The multiple busbars 8 connected to the output of the power conversion device 105 respectively contact corresponding connecting pieces 4, and the multiple busbars 8 connected to the input of each charging interface 107 respectively contact corresponding connecting pieces 4. In other words, the multiple busbars 8 connected to the output of the power conversion device 105 are not directly connected to or contact the multiple busbars 8 connected to the input of the charging interface 107. The current output from the power conversion device 105 must pass through the power distribution device 106 before it can be delivered to the designated charging interface 107.

[0065] Therefore, it is necessary to tighten the circuit board 3 and the mounting base 2 with screws 5 so that the connecting piece 4 is in stable contact with the corresponding busbar 8. If the tightening force is directly applied to the circuit board 3 after the screws 5 tighten the circuit board 3 and the mounting base 2, the circuit board 3 may be crushed, affecting the normal use of the circuit board 3.

[0066] Therefore, in this application, the connecting piece 4 is used to bear the locking force of the screw 5 to reduce the possibility of the circuit board 3 being damaged by pressure. Specifically, Figure 9 for Figure 6 The enlarged view of point A in the middle, refer to Figure 9 The power distribution device 106 also includes an insert 6, the circuit board 3 has a first through hole 31, the connecting piece 4 has a second through hole 41 connected to 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 portion of the insert 6 is located in the first through hole 31 and abuts the connecting piece 4, and another portion of the insert 6 is located outside the first through hole 31 (on 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, which is located on the side of the second through hole 41 away from the first through hole 31.

[0067] Reference Figure 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 the screw 5 is threadedly connected to the mounting base 2. The screw 5 can be a bolt (including but not limited to a combined bolt and a non-combined single bolt), or a screw (including but not limited to a combined screw and a non-combined single screw). It can be understood that the screw 5 includes a head 51 and a rod 52 (screw portion). The rod 52 of the screw 5 has threads for achieving a threaded connection with other structures. The head 51 of the screw 5 protrudes radially toward the outside of the rod 52. In the case where 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, as well as the washer in the combined screw.

[0068] Reference Figure 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 the connecting piece 4, and the part of the insert 6 located outside the first through hole 31 abuts the head 51 of the screw 5 (for example, abuts the washer included in the head 51 of the combined screw). Among them, the screw 5 abuts the insert 6 after being locked, and then the insert 6 abuts the connecting piece 4, so that the connecting piece 4 and the busbar 8 are clamped between the insert 6 and the mounting seat 2. In this way, the screw 5 does not directly abut the circuit board 3, but fixes the circuit board 3 by clamping the connecting piece 4 between the insert 6 and the mounting seat 2. It can not only fix the circuit board 3, but also make the connecting piece 4 and the busbar 8 contact and connect, and reduce the possibility of the circuit board 3 being directly crushed by the screw 5.

[0069] The present application does not impose any specific limitation on the aperture of the third through hole 81 . For example, the aperture of the third through hole 81 may be larger than that of the second through hole 41 . For another example, the aperture of the third through hole 81 may be smaller than or equal to that of the second through hole 41 .

[0070] Regarding the structure of the insert 6, in some examples, Figure 10 The structure of an insert 6 is shown as an example. Figure 9 and Figure 10 The insert 6 may include an embedded portion 61 and a flange portion 62 that are fixedly connected (for example, integrally arranged), and the flange portion 62 protrudes toward the outside of the embedded portion along the radial direction of the embedded portion 61. For example, the embedded portion 61 is annular, and the flange portion 62 is also an annular structure, and the outer diameter of the flange portion 62 is larger than the outer diameter of the embedded portion 61. The flange portion 62 is sleeved and fixed on the outside of the embedded portion 61.

[0071] Reference Figure 9 and Figure 10 After the insert 6 is installed, the embedded portion 61 extends into the first through-hole 31, while the flange portion 62 is located outside the first through-hole 31. A gap exists between the flange portion 62 and the circuit board 3. After tightening the screw 5, the flange portion 62 abuts the head 51 of the screw 5, but does not abut the circuit board 3. The circuit board 3 is not directly subjected to the pressure of the screw 5, reducing the possibility of damage to the circuit board 3. Furthermore, the use of inserts 6 of unequal diameters provides a larger contact area between the insert 6 and the head 51 of the screw 5. During the tightening process of the screw 5, the flange portion 62 can share more stress. Furthermore, it also increases the friction between the head 51 of the screw 5 and the insert 6, reducing the possibility of the screw 5 loosening after tightening.

[0072] Furthermore, when the flange portion 62 is annular, in some examples, the diameter of the flange portion 62 may be larger than the diameter of the head 51 of the screw 5. The diameter of the head 51 may be the diameter of the plane of the head 51 of the screw 5 that contacts the insert 6 (or the maximum diagonal length). This increases the contact area between the flange portion 62 and the screw 5, further increasing the friction between them and making the screw 5 less likely to loosen after being tightened.

[0073] In other examples, the flange portion 62 may not be annular. For example, the flange portion 62 may be cam-shaped and protrude toward one side of the embedded portion 61. Alternatively, the flange portion 62 may be shaped differently (e.g., irregularly shaped), as long as the flange portion 62 protrudes toward 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 tightened, a gap exists between the flange portion 62 and the circuit board 3. In other words, the flange portion 62 does not exert pressure on the circuit board 3.

[0074] It should be noted that the present application does not impose any specific limitation on the size of the gap between the flange portion 62 and the circuit board 3 . The gap may be 0.1 mm, 1 mm, 3 mm, and so on.

[0075] Regarding the structure of the insert 6, in some other examples, the insert 6 is ring-shaped, for example, Figure 11 Another structure of the insert 6 is shown as an example. Figure 11 In the axial direction of the insert 6, the outer diameters of the insert 6 are equal (in addition, the inner diameters 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 insert 6 of equal diameter is used. 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. Moreover, because the outer diameter of the insert 6 is larger than the inner diameter of the second through-hole 41, the insert 6 does not pass through the second through-hole 41 after installation, but instead abuts against the connecting piece 4. In this way, after tightening the screw 5, the insert 6 can press the connecting piece 4, thereby fixing the circuit board 3 to the mounting base 2. The tightening force of the screw 5 is absorbed by the connecting piece 4, reducing the possibility of damage to the circuit board 3.

[0076] exist Figure 11 In the example shown, the diameter of the head 51 of the screw 5 may be larger than the diameter of the insert 6 , or the diameter of the head 51 of the screw 5 may be equal to or smaller than the diameter of the insert 6 , and this application does not impose any specific limitation on this.

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

[0078] Regarding the threaded connection between the screw 5 and the mounting base 2, in one example, return to reference Figure 9 The power distribution device 106 further includes a nut 9. The mounting base 2 has a mounting hole 21. For example, the mounting base 2 has one or more bosses (the number of bosses being the same as the number of corresponding busbars 8) for supporting the busbar 8. The mounting hole 21 is formed on the boss. The mounting hole 21 is located on the side of the third through-hole 81 facing away from the second through-hole 41. The nut 9 is at least partially located within the mounting hole 21. The nut 9 is fixed to the busbar 8 (e.g., by riveting, welding, etc.). The screw 5 is threadedly connected to the nut 9.

[0079] In some other examples, such as referring to Figure 11 , the nut 9 can also be fixed on the mounting base 2. Or, in some other examples, the mounting base 2 is provided with a screw hole, and the screw 5 is directly threadedly connected to the screw hole on the mounting base 2. In this example, the nut 9 may not be separately provided.

[0080] Among them, the nut 9 of the present application refers to a structure provided with a screw 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 opening a screw hole on a cylinder or a disk.

[0081] In some other examples, the connecting piece 4 may not serve as a structure for electrically connecting the switch device 7, that is, the connecting piece 4 may only serve as a structure for clamping the insert 6 and the mounting seat 2, for example, Figure 12 Another partial structure of the power distribution device 106 is shown as an example. Figure 12 The connecting piece 4 is provided on one side of the board surface of the circuit board 3. The circuit board 3 has a first through hole 31. The connecting piece 4 has a second through hole 41 connected to 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 portion of the insert 6 is located within the first through hole 31 and abuts the connecting piece 4, while another portion of the insert 6 is located outside the first through hole 31 and abuts the head 51 of the screw 5. After being tightened, the screw 5 abuts the insert 6, and then abuts the connecting piece 4 through the insert 6. The connecting piece 4 abuts the mounting seat 2 (in this example, the connecting piece 4 may not contact the busbar 8, so the busbar 8 may not be provided between the connecting piece 4 and the mounting seat 2). The connecting piece 4 is sandwiched between the insert 6 and the mounting seat 2. By clamping the connecting piece 4 to fix the circuit board 3, the screw 5 does not directly apply a locking force to the board surface of the circuit board 3, reducing the possibility of damaging the circuit board 3 during the process of the screw 5 fixing the circuit board 3.

[0082] Among them, Figure 12 In the example shown, the connecting piece 4 does not function to electrically connect the switch device 7 and the busbar 8. Therefore, the connecting piece 4 can be a metal piece or 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 (when the insert 6 has unequal diameters). For another example, the insert 6 can be a cylinder with equal diameters, etc., and this application will not repeat them here.

[0083] In some other examples, the power distribution device 106 may include a plurality of screws 5 and connecting pieces 4 corresponding to the plurality of screws 5, each connecting piece 4 being fixed on the circuit board 3. Some connecting pieces 4 are used to electrically connect the switching device 7 and contact the busbar 8 (for example, Figure 9 ), such connecting pieces 4 can support the insert 6, reducing the possibility of the insert 6 damaging the circuit board 3 after the screw 5 is tightened; some connecting pieces 4 are not electrically connected to the switch device 7 and the busbar 8, but only serve as a supporting structure for the insert 6 (for example, Figure 12 ), reducing the possibility of the insert 6 damaging the circuit board 3 after the screw 5 is tightened.

[0084] When the power distribution device 106 includes multiple screws 5, each screw 5 can be arranged in a one-to-one correspondence with a connecting plate 4 (a second through hole 41 is provided on a connecting plate 4), and multiple screws 5 can also be arranged in a corresponding correspondence with a connecting plate 4 (a connecting plate 4 is provided with multiple second through holes 41). This application does not impose any specific restrictions on this.

[0085] In some examples, all positions on the circuit board 3 where the screws 5 are set are provided with inserts 6 and connecting pieces 4, and the aperture of the first through hole 31 on the circuit board 3 is larger than the aperture of the second through hole 41 on the connecting piece 4; in other examples, only a part of the positions on the circuit board 3 where the screws 5 are set are provided with inserts 6 and connecting pieces 4; in other examples, only one position on the circuit board 3 where the screws 5 are set is provided with inserts 6 and connecting pieces 4.

[0086] The material of the insert 6 can be set according to the needs. For example, when the hole positions corresponding to the circuit board 3 need to be electrically connected, the material of the insert 6 is metal, wherein the metal insert 6 has better conductivity. For another example, when the hole positions corresponding to the circuit board 3 do not need to be electrically connected, the material of the insert 6 can be non-metallic. Or, in some examples, when the hole positions corresponding to the circuit board 3 do not need to be electrically connected, the material of the insert 6 can also be metal. The metal insert 6 can be mass-produced (the plastic insert 6 requires additional mold opening), which can reduce production and processing costs, and the metal insert 6 has a stronger ability to withstand the locking force, can better support the screw 5, and reduce the possibility of damaging the circuit board 3.

[0087] In addition, in some examples, the insert 6 can be fixed on the circuit board 3. For example, the insert 6 can be fixed in the corresponding first through hole 31 by riveting, bonding, welding or clamping, so as to achieve fixation between the insert 6 and the circuit board 3 (when the circuit board 3 is moved, the insert 6 moves with the circuit board 3), thereby improving the integration between the insert 6 and the circuit board 3, facilitating the installation and removal of the screw 5, and reducing the possibility of the insert 6 being misplaced or lost during the assembly process.

[0088] In some examples, the power distribution device 106 further includes a metal ring 10, Figure 13 The structure of a metal ring 10 is shown as an example. The metal ring 10 is fixed within the first through-hole 31. In other words, the first through-hole 31 on the circuit board 3 is metallized by the metal ring 10. This increases the strength of the first through-hole 31 and reduces the possibility of deformation of the first through-hole 31 and damage to the circuit board 3. The portion of the insert 6 that extends into the first through-hole 31 is located within the space enclosed by the metal ring 10. When the screw 5 is installed, it passes through the metal ring 10 as well as the insert 6.

[0089] In the example where the metal ring 10 is provided inside the first through hole 31 , the metal ring 10 may be provided inside each first through hole 31 , or may be provided inside a portion (one or more) of the first through holes 31 .

[0090] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A power distribution device for distributing input current into at least one path and outputting the current, characterized in that: include: Mounting seat; A circuit board and a connecting piece, wherein the connecting piece is fixed to a board surface on one side of the circuit board, the circuit board has a first through hole, and the connecting piece has a second through hole connected to the first through hole, wherein the aperture of the first through hole is larger than the aperture of the second through hole; an insert, wherein a portion of the insert is located in the first through hole and abuts against the connecting piece, and another portion of the insert is located outside the first through hole; A screw passes through the insert, the first through hole and the second through hole and is threadedly connected to the mounting seat, wherein the head of the screw is located on the side of the circuit board away from the connecting piece and abuts against the portion of the insert located outside the first through hole.

2. The power distribution device according to claim 1, characterized in that: The insert includes a connected embedding portion and a flange portion, the embedding portion is located in the first through hole, the flange portion is located outside the first through hole, the flange portion protrudes toward the outside of the embedding portion along the radial direction of the first through hole, the flange portion abuts the head of the screw, and there is a gap between the flange portion and the circuit board.

3. The power distribution device according to claim 2, characterized in that: The flange portion is annular, and an outer diameter of the flange portion is larger than a diameter of a flat surface of the screw head for contacting the flange portion.

4. The power distribution device according to claim 1, wherein: The insert is annular, and has a uniform outer diameter 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 larger than the inner diameter of the second through hole.

5. The power distribution device according to any one of claims 1 to 4, characterized in that: The power distribution device further includes: A switch device, the switch device is fixed on the circuit board, and the connecting piece is a metal piece and is electrically connected to the switch device; A busbar is fixed on the mounting base and contacts the connecting piece. The busbar has a third through hole. The third through hole is located on a side of the second through hole away from the first through hole. The screw passes through the third through hole.

6. The power distribution device according to claim 5, characterized in that: The power distribution device also includes a nut, the mounting base 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 to the nut, the nut is fixed on the busbar, or the nut is fixed on the mounting base.

7. The power distribution device according to claim 1, characterized in that: The material of the insert is metal.

8. The power distribution device according to claim 1, wherein: The insert is fixed on the circuit board.

9. The power distribution device according to claim 1, characterized in that: The power distribution device further includes a metal ring, which is fixed in the first through hole. The portion of the insert extending into the first through hole is located in the space enclosed by the metal ring.

10. A charging device, characterized in that: The invention comprises a power distribution device, a power conversion device and a plurality of charging interfaces as described in any one of claims 1 to 9, wherein the power distribution device is electrically connected to the power conversion device and the plurality of charging interfaces, and the power distribution device is used to distribute the direct current output by the power conversion device to at least one of the charging interfaces.

11. The charging device according to claim 10, characterized in that: The power distribution device also includes a switching device and a busbar, the switching device is fixed on the circuit board, the connecting piece is a metal sheet and is electrically connected to the switching device, the busbar is fixed on the mounting base 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 at least one of the charging interfaces.

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