Power conversion device and electrical connector

Abstract

The application relates to a power conversion device and an electric connector, and relates to the technical field of electric connectors. In the power conversion device, the electric connector is fixedly connected with a circuit board in a plug-in mode, the electric connector is electrically connected with the circuit board without a cable, the manufacturing process such as welding and pressure connection of the electric connector is reduced, the mounting efficiency of the electric connector is improved, meanwhile, the board space occupied by the electric connector on the circuit board is also reduced. Furthermore, at the conductive connection part on the circuit board, a plurality of first conductive blocks are electrically connected with a power module or / and a controller on the circuit board through the wiring of the circuit board, an additional cable is not needed to electrically connect the conductive connection part with the power module or / and the controller, the board area occupied by the conductive connection part on the circuit board can be effectively reduced, and thus the board space occupied by the electric connector on the circuit board is reduced.

Description

Technical Field

[0001] This application relates to the field of electrical connector technology, and in particular to a power conversion device and an electrical connector. Background Technology

[0002] D-subminiature connectors (DB connectors) are commonly used to establish signal or power connections between external devices and circuit boards within power conversion devices. To ensure reliable connections and facilitate subsequent maintenance and debugging, DB connectors are typically connected to the circuit board via cables. However, during installation, cables are prone to becoming tangled, twisted, or crossed, resulting in DB connectors occupying a significant amount of space on the circuit board. Summary of the Invention

[0003] This application provides a power conversion device and an electrical connector. The electrical connector is plugged into a conductive connection part to realize a wireless connection between the electrical connector and the circuit board. The first conductive block on the conductive connection part on the circuit board is directly electrically connected to the power module and / or controller through the circuit board traces, thereby reducing the area occupied by the conductive connection part on the circuit board and reducing the space occupied by the electrical connector on the circuit board.

[0004] In a first aspect, this application provides a power conversion device, comprising a housing, a circuit board, a power module, a controller, and an electrical connector. The housing houses the circuit board, the power module, and the controller, and the housing has a through hole. The power module and / or the controller are mounted on the surface of the circuit board. The circuit board has a conductive connection portion, which is disposed opposite to the through hole in a first direction. A plurality of first conductive blocks are disposed on the surface of the conductive connection portion in a second direction. The plurality of first conductive blocks are electrically connected to the power module and / or the controller through traces on the circuit board, and the plurality of first conductive blocks are arranged along a third direction. The electrical connector includes a housing and a plurality of first pins. A portion of the housing passes through the through hole and is inserted and fixed to the conductive connection portion. The plurality of first pins correspond one-to-one with the plurality of first conductive blocks. The plurality of first pins are housed in the housing and are arranged along a third direction. Each first pin contacts a first conductive block. The end of the first pin away from the conductive connection portion is connected to an external device. The housing is inserted into the conductive connection portion along the first direction, and the first direction, the second direction, and the third direction are perpendicular.

[0005] In the power conversion device of this application, the electrical connector and the circuit board are fixed by plugging in, realizing a wireless electrical connection between the electrical connector and the circuit board. This reduces manufacturing processes such as soldering and crimping of the electrical connector, improves the installation efficiency of the electrical connector, and also reduces the space occupied by the electrical connector on the circuit board. Furthermore, at the conductive connection part on the circuit board, multiple first conductive blocks are electrically connected to the power module and / or controller on the circuit board through the circuit board's traces. There is no need to set up additional cables to connect the conductive connection part and the power module and / or controller, which can effectively reduce the area occupied by the conductive connection part on the circuit board, thereby reducing the space occupied by the electrical connector on the circuit board.

[0006] In conjunction with the first aspect, in one possible implementation, the conductive connection part is provided with a plurality of first conductive blocks on both surfaces opposite to each other in the second direction, and the plurality of first pins are arranged in two rows along the second direction, with the two rows of first pins respectively contacting the first conductive blocks on the two opposite sides of the conductive connection part along the second direction.

[0007] This configuration allows for the placement of more first pins in the electrical connector, improving the utilization rate of the conductive connection on both opposite sides in the second direction.

[0008] In conjunction with the first aspect, in one possible implementation, the conductive connection portion further includes a second conductive block on one side of its surface in the second direction. The second conductive block is electrically connected to the power module and / or controller via traces on a circuit board. At least a portion of the second conductive block is located between two adjacent first conductive blocks in the third direction. The second conductive block is located on the side of the plurality of first conductive blocks facing the through-hole in the first direction. The electrical connector also includes a second pin, which is arranged along the third direction with the plurality of first pins. The second pin contacts the second conductive block, and the end of the second pin away from the conductive connection portion is connected to an external device.

[0009] The second conductive block is located on the side of the plurality of first conductive blocks facing the through hole in the first direction. That is, in the first direction, the plurality of first conductive blocks can be arranged in the same row, and the second conductive block is arranged in another row. Compared with the second conductive block being arranged between the plurality of first conductive blocks, the size of the conductive connection part in the third direction can be reduced. Furthermore, the second conductive block is electrically connected to the power module and / or controller on the circuit board through the circuit board traces, eliminating the need for additional cables to connect the conductive connection part and the power module and / or controller, thereby reducing the space occupied by the electrical connector on the circuit board. In addition, the layout of the second conductive block and the plurality of first conductive blocks ensures that two adjacent first conductive blocks in the third direction have sufficient spacing to meet the insulation safety distance requirements, and that the areas of the first conductive block and the second conductive block are kept as consistent as possible, ensuring the reliability of the connection between the first pin and the first conductive block, the second pin and the second conductive block.

[0010] In conjunction with the first aspect, in one possible implementation, in the first direction, the end of the first pin near the conductive connection is further away from the through hole than the end of the second pin near the conductive connection.

[0011] Since the second conductive block is located on the side of the first conductive block facing the through hole in the first direction, when the second pin contacts the second conductive block, it does not need to extend into the position between two adjacent first conductive blocks in the third direction. Instead, the first pin extends into the first conductive block and contacts it. Thus, when the electrical connector is plugged into the conductive connection part, the first pin contacts the first conductive block further away, and the second pin contacts the second conductive block closer to it. That is, the length of the second pin extending into the housing is shorter than the length of the first pin extending into the housing. There is no second pin between two adjacent first conductive blocks in the third direction, ensuring the safety distance between two adjacent first conductive blocks and reducing the risk of arcing and leakage.

[0012] In conjunction with the first aspect, in one possible implementation, the end of the first pin furthest from the conductive connection and the end of the second pin furthest from the conductive connection are flush.

[0013] This design makes the ends of the first pin and the second pin that are away from the conductive connection part more regular. At the same time, when the electrical connector is connected to an external device, the first pin and the second pin can be aligned synchronously, and there will be no situation where individual pins contact the external device first or uneven force is applied. This can effectively prevent the first pin and the second pin from bending or deforming when connected to an external device.

[0014] In conjunction with the first aspect, in one possible implementation, when multiple first pins are arranged in two rows along the second direction, at least one row of first pins and second pins are located on the same side of the conductive connection portion in the second direction.

[0015] The second pin is placed by making full use of the gap between two adjacent first pins in the same row, which is conducive to the miniaturization design of electrical connectors.

[0016] In conjunction with the first aspect, in one possible implementation, the housing includes a bottom plate, a top plate, a first side plate, and a second side plate. The bottom plate and the top plate are arranged relatively spaced apart along a second direction, and the first side plate and the second side plate are arranged relatively spaced apart along a third direction. The bottom plate and the top plate are connected by the first side plate and the second side plate to form a receiving space, and the receiving space contains a conductive connection portion and a plurality of first pins and second pins.

[0017] The base plate, top plate, first side plate, and second side plate can isolate the positions where the first pin and the second pin make conductive contact with the conductive connection part from other positions on the circuit board, which helps to improve the insulation and protection performance of the electrical connection between the electrical connector and the conductive connection part.

[0018] In conjunction with the first aspect, in one possible implementation, the circuit board has a first groove recessed from the edge of the circuit board along a first direction, and a conductive connection portion is provided on one side of the first groove along a third direction, and a first side plate is inserted into the first groove.

[0019] In other words, the conductive connection part is located at the corner of the circuit board. The conductive connection part has a first groove on one side in the third direction, and the other side of the conductive connection part in the third direction is the edge of the circuit board. When the housing is inserted into the conductive connection part, the first side plate is inserted into the first groove, and the second side plate is located outside the edge of the circuit board. The first groove and the first side plate limit the electrical connector and the conductive connection part in the third direction, reduce or avoid the displacement of the electrical connector in the third direction, and ensure the reliability of the connection between the electrical connector and the conductive connection part.

[0020] In conjunction with the first aspect, in one possible implementation, the circuit board further includes a second groove recessed from the same edge of the circuit board along a first direction, the second groove and the first groove being spaced apart along a third direction, a conductive connection being provided between the second groove and the first groove, and a second side plate being inserted into the second groove.

[0021] In other words, the conductive connection part has a portion of circuit board on each of its opposite sides along the third direction. By setting a first groove between the conductive connection part and the portion of circuit board on one side of the conductive connection part in the third direction, and setting a second groove between the conductive connection part and the portion of circuit board on the other side of the conductive connection part in the third direction, the first side plate is inserted into the first groove and the second side plate is inserted into the second groove. The first side plate and the first groove, as well as the second side plate and the second groove, limit the electrical connector and the conductive connection part in the third direction, reduce or avoid the displacement of the electrical connector in the third direction, and ensure the reliability of the connection between the electrical connector and the conductive connection part.

[0022] In conjunction with the first aspect, in one possible implementation, the electrical connector further includes a first fixing plate mounted on the housing, the first fixing plate having a receiving groove, a portion of the sidewall of the receiving groove having a through hole, the opening of the receiving groove facing outward from the housing in a first direction, the bottom of the receiving groove having a first opening, a portion of the housing passing through the first opening and extending into the housing, and another portion of the housing being located in the receiving groove and contacting the bottom of the receiving groove.

[0023] A portion of the housing extends into the enclosure through the receiving groove and the first opening, where it is inserted and fixed to the conductive connection. Since the first opening is located at the bottom of the receiving groove, and another portion of the housing is located within the receiving groove and in contact with its bottom, the bottom of the receiving groove forms the first opening. The bottom of the receiving groove, where the first opening is not formed, restricts further extension of the housing into the enclosure. This contact between the housing within the receiving groove and its bottom acts as a limit, preventing unrestricted extension into the enclosure and reducing or avoiding mechanical impact on the circuit board. Furthermore, the sidewall of the receiving groove within the enclosure provides support, reducing the force exerted by the housing on the conductive connection in the second direction. This effectively prevents bending or deformation of the conductive connection, ensuring the stability of the electrical connection between the first and second pins and the conductive connection.

[0024] In conjunction with the first aspect, in one possible implementation, the electrical connector further includes a mounting base disposed on the side of the housing opposite to the conductive connection portion and partially housed in a receiving groove. The mounting base has a plurality of spaced-apart through holes that penetrate both opposite sides of the mounting base along a first direction. The number of through holes is equal to the sum of the number of first pins and second pins, wherein each first pin is housed in one through hole and each second pin is housed in one through hole.

[0025] The end of each first pin furthest from the conductive connection is housed in a through-hole, and the end of each second pin furthest from the conductive connection is also housed in a through-hole. This spacees the ends of the first and second pins furthest from the conductive connection, ensuring insulation between adjacent first pins and between the first and second pins. Furthermore, external devices can connect to the first or second pins within the through-holes.

[0026] In conjunction with the first aspect, in one possible implementation, the perforation includes a first segment and a second segment that are connected. The first segment is closer to the conductive connection portion than the second segment. The diameter of the first segment is larger than the diameter of the second segment. The end of the first pin that is away from the conductive connection portion is located on the side of the second segment facing the first segment in a first direction and is received in the corresponding first segment. The end of the second pin that is away from the conductive connection portion is located on the side of the second segment facing the first segment in a first direction and is received in the corresponding first segment.

[0027] Since the electrical connector and the conductive connection part are connected by a plug-in method, during the plug-in process, when the first pin and the second pin are plugged into the conductive connection part, the conductive connection part will apply a frictional force towards the outside of the housing to the first pin and the second pin. This can easily cause the first pin to detach from the first conductive block and the second pin to detach from the second conductive block, affecting the reliability of the electrical connection between the electrical connector and the conductive connection part. In this application, the diameter of the first hole segment is larger than the diameter of the second hole segment, so that a stepped surface is formed between the first hole segment and the second hole segment. When multiple first pins move out of the housing, the stepped surface can prevent the end of the first pin away from the conductive connection part from entering the second hole segment, and prevent the first pin from continuing to move out of the housing, so that the end of the first pin away from the conductive connection part is always located in the first hole segment, ensuring the reliability of the contact between the first pin and the first conductive block. When the second pin moves out of the housing, the stepped surface also prevents the end of the second pin away from the conductive connection from entering the second hole section, so that the end of the second pin away from the conductive connection is always contained in the first hole section, and the end of the first pin away from the conductive connection is always contained in the first hole section, ensuring the reliability of the contact between the second pin and the second conductive block.

[0028] In conjunction with the first aspect, in one possible implementation, the electrical connector further includes a second fixing plate disposed on the side of the first fixing plate away from the housing. The second fixing plate has a receiving groove with the opening of the receiving groove facing the first fixing plate in a first direction. The receiving groove receives a portion of a mounting base, and another portion of the mounting base is located at the edge of the opening of the receiving groove. The bottom of the receiving groove is located on the side of the second fixing plate away from the first fixing plate. The bottom of the receiving groove has a second opening for allowing an external device to extend into the mounting base and connect with a plurality of first pins and second pins within the mounting base.

[0029] After the second fixing plate is connected to the first fixing plate, the mounting base in the receiving groove can be connected and fixed together with the housing mounted on the first fixing plate. In addition, the receiving groove on the second fixing plate can fix and support the mounting base, ensuring that the mounting base and the housing have good alignment. Since the first pin and the second pin are simultaneously received in the housing and the mounting base, the connection between the housing and the mounting base has good alignment, which can reduce or avoid the bending of the first pin and the second pin at the same time.

[0030] In conjunction with the first aspect, in one possible implementation, one of the first fixing plate and the second fixing plate is provided with a bent portion, the bent portion being bent relative to one of the first fixing plate and the second fixing plate, and the other of the first fixing plate and the second fixing plate is provided with a notch, the bent portion being fastened to the other of the first fixing plate and the second fixing plate and partially located within the notch.

[0031] The first and second fixing plates are connected together by a bend-fitting mechanism. Compared to screw fixing, this bend-fitting connection is simpler and easier to implement, and it reduces the number of components in the electrical connector, thus lowering costs. Furthermore, the bend-fitting mechanism engages at the notch to reduce or prevent misalignment between the first and second fixing plates.

[0032] Secondly, this application provides an electrical connector, which includes a housing and a plurality of first pins, wherein the plurality of first pins are housed within the housing and are arranged at intervals. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0034] Figure 1 This is a schematic diagram of the architecture of a photovoltaic system provided in an embodiment of this application; Figure 2 This is a schematic diagram of the power supply system architecture provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a power conversion device provided in an embodiment of this application; Figure 4 This is a partial structural schematic diagram of a power conversion device provided in one embodiment of this application; Figure 5 This is an exploded view of a power conversion device according to an embodiment of this application; Figure 6 This is an exploded view of an electrical connector and circuit board according to an embodiment of this application; Figure 7 This is an exploded view of another power conversion device provided in an embodiment of this application; Figure 8 An exploded view of another electrical connector provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of an electrical connector provided in one embodiment of this application; Figure 10 for Figure 9 The diagram shows an exploded view of the electrical connector. Figure 11 A cross-sectional structural schematic diagram of an electrical connector provided in an embodiment of this application; Figure 12 for Figure 11 An enlarged view of point A in the electrical connector shown.

[0035] Explanation of reference numerals in the attached figures: X - First direction; Y - Second direction; Z - Third direction; 10 - Housing; 11 - Through hole; 20 - Circuit board; 21 - Conductive connection part; 22 - First conductive block; 23 - Second conductive block; 24 - First groove; 25 - Second groove; 30 - Electrical connector; 31 - Housing; 311 - Bottom plate; 312 - Top plate; 313 - First side plate; 314 - Second side plate; 315 - Protruding edge; 316 - Receiving space; 32 - First pin; 321 - First connection part; 322 - First abutment part; 323 - First stop part; 33 - Second pin; 331 - Second connection part; 332 - Second abutment part; 333 - Second stop part; 34 - First fixing Plate; 341-Receiving groove; 342-Bottom of the receiving groove; 343-First opening; 344-Notch; 345-First mounting hole; 35-Mounting base; 351-Through hole; 3511-First hole section; 3512-Second hole section; 3513-Step surface; 36-Second fixing plate; 361-Receiving groove; 362-Second opening; 363-Bend; 364-Second mounting hole; 37-Fastener; 371-Head; 372-Stem; 40-Power module; 100-Photovoltaic module; 200-Power conversion device; 300-AC combiner box; 400-Box-type substation; 500-Power grid; 600-Electrical equipment; 700-Communication equipment. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0037] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of a photovoltaic system provided in one embodiment of this application. Figure 1 As shown, the photovoltaic system includes photovoltaic modules 100, power conversion devices 200, AC combiner boxes 300, prefabricated substations 400, and a power grid 500. The power conversion device 200 can be a photovoltaic inverter. The photovoltaic modules 100 convert solar energy into direct current (DC) through the photovoltaic effect. Each photovoltaic module 100 includes multiple cells connected in series or parallel to achieve a certain output power. There are multiple power conversion devices 200, each connected to the photovoltaic modules 100, used to convert the DC power from the photovoltaic modules 100 into AC power. The multiple power conversion devices 200 can be connected to each other via electrical connectors. Figure 1The communication connection between the two power conversion devices 200 is indicated by a dashed line, enabling parallel operation of multiple power conversion devices 200 and ensuring that the output voltage of each power conversion device 200 remains consistent. The AC combiner box 300 is used to return the AC power output from multiple power conversion devices 200 to the prefabricated substation 400. After being stepped up by the prefabricated substation 400, the transformed AC power is transmitted to the power grid 500.

[0038] Please see Figure 2 , Figure 2 This is a schematic diagram of the architecture of a power supply system provided in an embodiment of this application. The power supply system includes a power conversion device 200, an electrical device 600, and a communication device 700. The power conversion device 200 can be a blade power supply, which is an energy storage device that can provide electrical energy to the electrical device. In specific applications, the blade power supply can be used to communicate with the communication device 700. The blade power supply may contain a power module for power conversion. The power module is connected to the communication device via an electrical connector, thus realizing the communication connection between the blade power supply and the communication device 700. Figure 2 The communication connection between the power conversion device 200 and the communication device 700 is indicated by a dashed line. The electrical connector is used to transmit control signals and data, enabling the communication device to promptly detect the operating status of the blade power supply based on the signals transmitted by the electrical connector, thus ensuring the reliability of the power supply system.

[0039] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of a power conversion device 200 provided in an embodiment of this application. This application provides a power conversion device 200, which includes a housing 10, a circuit board 20, electrical connectors 30, a power module 40, and a controller (not shown). The space enclosed by the housing 10 houses the circuit board 20, some of the electrical connectors 30, the power module 40, and the controller. The housing 10 can protect the circuit board 20 and the devices mounted on the circuit board 20 (such as the power module 40 and the controller) from dust, moisture, foreign objects, etc., entering the housing 10 to prevent corrosion and damage to the circuit board 20 and the devices mounted on the circuit board 20. Furthermore, the housing 10 can effectively prevent the circuit board 20 and the devices mounted on the circuit board 20 from mechanical impact.

[0040] Power devices, such as power modules 40, controllers, capacitors, and inductors, can be mounted on the surface of circuit board 20. These devices are electrically connected to the traces on circuit board 20. Simultaneously, circuit board 20 is also connected to electrical connector 30 to establish communication or power connections between the power conversion device 200 and external devices (such as other power conversion devices 200 or communication equipment). For example, when power module 40 is connected to electrical connector 30 via circuit board 20, electrical connector 30 can transmit the current / voltage signals output by power module 40 to the external device; similarly, when controller is connected to electrical connector 30 via circuit board 20, electrical connector 30 can transmit the control signals output by controller to the external device. When used for power connection, electrical connector 30 primarily serves as a low-voltage auxiliary power supply to adjacent devices.

[0041] Please combine them together Figure 4 and Figure 5 , Figure 4 This is a partial structural schematic diagram of a power conversion device 200 provided in an embodiment of this application. Figure 5 This is an exploded structural diagram of a power conversion device 200 provided in an embodiment of this application. For example, the housing 10 has a through hole 11, through which a portion of the electrical connector 30 passes and connects to the circuit board 20 inside the housing 10. The circuit board 20 has a conductive connection portion 21, which is positioned opposite to the through hole 11 in a first direction X. The surface of the conductive connection portion 21 in a second direction Y has multiple first conductive blocks 22. These multiple first conductive blocks 22 are electrically connected to the power module 40 and / or the controller via traces on the circuit board 20. The multiple first conductive blocks 22 are arranged along a third direction Z.

[0042] The electrical connector 30 includes a housing 31 and a plurality of first pins 32. A portion of the housing 31 has a through hole 11 and is inserted and fixed to a conductive connection portion 21. Each of the plurality of first pins 32 corresponds to a plurality of first conductive blocks 22. The plurality of first pins 32 are housed within the housing 31 and arranged along a third direction Z. Each first pin 32 contacts a first conductive block 22, achieving electrical connection between the first pin 32 and the conductive connection portion 21. The end of the first pin 32 furthest from the conductive connection portion 21 is connected to an external device. The housing 31 has a through hole 11 along a first direction X and is inserted into the conductive connection portion 21. The first direction X and the second direction Y are perpendicular to the third direction Z.

[0043] In the power conversion device 200 of this application, the electrical connector 30 and the circuit board 20 are fixed by plugging in, realizing a wireless electrical connection between the electrical connector 30 and the circuit board 20. This reduces manufacturing processes such as soldering and crimping of the electrical connector 30, improves the installation efficiency of the electrical connector 30, and also reduces the space occupied by the electrical connector 30 on the circuit board 20. Furthermore, at the conductive connection portion 21 on the circuit board 20, multiple first conductive blocks 22 are electrically connected to the power module 40 and / or the controller through the wiring of the circuit board 20. There is no need to set up additional cables to connect the conductive connection portion 21 and the power module 40 and / or the controller, which can effectively reduce the area occupied by the conductive connection portion 21 on the circuit board 20, thereby reducing the space occupied by the electrical connector 30 on the circuit board 20.

[0044] The conductive connection part 21 is a part on the circuit board 20 used to plug into and electrically connect with the electrical connector 30. The first conductive block 22 on the conductive connection part 21 is exposed on the surface of the conductive connection part 21 on the Y side in the second direction. In this way, the first pin 32 can be directly connected to the first conductive block 22, reducing the welding and crimping processes between the electrical connector 30 and the conductive connection part 21, and improving the installation efficiency of the electrical connector 30.

[0045] Please see Figure 4 In one embodiment, the conductive connection portion 21 can be disposed at the corner of the circuit board 20. In order to facilitate the insertion of the housing 31 of the electrical connector 30 into the conductive connection portion 21, the circuit board 20 is also provided with a first groove 24 recessed from the edge of the circuit board 20 along the first direction X. Specifically, the edge of the circuit board 20 facing the through hole 11 in the first direction X forms the first groove 24. At this time, the conductive connection portion 21 is provided on the side of the first groove 24 along the third direction Z. Thus, when the electrical connector 30 is inserted into the conductive connection portion 21 located at the corner, a part of the housing 31 is located outside the edge of the circuit board 20 on the third direction Z side, and a part of the housing 31 is located in the first groove 24, realizing the insertion connection between the electrical connector 30 and the conductive connection portion 21. At the same time, the part of the housing 31 is inserted into the first groove 24, realizing the limitation of the housing 31 in the third direction Z, reducing or avoiding the displacement of the electrical connector 30 in the third direction Z, and ensuring the reliability of the connection between the electrical connector 30 and the conductive connection portion 21.

[0046] like Figure 5As shown, in another embodiment, the conductive connection portion 21 has partial circuit boards 20 on both opposite sides in the third direction Z. In this case, with the first groove 24 provided on the circuit board 20, the first groove 24 is located between the conductive connection portion 21 and the part of the circuit board 20 on the third direction Z side of the conductive connection portion 21. The circuit board 20 also has a second groove 25 recessed from the same edge of the circuit board 20 along the first direction X. The second groove 25 and the first groove 24 are spaced apart along the third direction Z. The conductive connection portion 21 is provided between the second groove 25 and the first groove 24. That is, the second groove 25 is located between the conductive connection portion 21 and the part of the circuit board 20 on the other side of the third direction Z of the conductive connection portion 21. In this way, a part of the housing 31 is inserted into the first groove 24, and another part of the housing 31 along the third direction Z is inserted into the second groove 25, thereby limiting the housing 31 in the third direction Z, reducing or avoiding the displacement of the electrical connector 30 in the third direction Z, and ensuring the reliability of the connection between the electrical connector 30 and the conductive connection portion 21.

[0047] Please see Figure 5 and Figure 6 , Figure 6 This is an exploded structural diagram of an electrical connector 30 and a circuit board 20 according to an embodiment of this application. The conductive connection portion 21 has multiple first conductive blocks 22 on both opposite surfaces in the second direction Y. Multiple first pins 32 are arranged in two rows along the second direction Y, wherein each row of first pins 32 has multiple first pins 32 spaced apart along the third direction Z. The two rows of first pins 32 respectively contact the first conductive blocks 22 on the opposite surfaces of the conductive connection portion 21 in the second direction Y. This arrangement allows for more first pins 32 to be placed in the electrical connection portion, improving the utilization rate of the opposite surfaces of the conductive connection portion 21 in the second direction Y. Furthermore, the double-row arrangement of the first pins 32 and the first conductive blocks 22 is suitable for electrical connectors 30 with a smaller number of pins, and compared to a side-by-side arrangement of multiple first pins 32, it can effectively reduce the space occupied by the electrical connector 30 on the circuit board 20.

[0048] Please see Figure 7 , Figure 7 This is an exploded structural diagram of another power conversion device 200 provided in one embodiment of this application. In one embodiment, the conductive connection portion 21 is further provided with a second conductive block 23 on the surface of the second direction Y side. The second conductive block 23 is connected to the power module 40 (e.g., via the traces of the circuit board 20) through the traces of the circuit board 20. Figure 3(As shown) or / and electrically connected to the controller, at least a portion of the second conductive block 23 is located between two adjacent first conductive blocks 22 in the third direction Z. The second conductive block 23 is located on the side of the plurality of first conductive blocks 22 facing the through hole 11 in the first direction X, that is, the orthographic projection of the second conductive block 23 along the third direction Z does not overlap with the orthographic projection of any of the first conductive blocks 22 along the third direction Z. The electrical connector 30 also includes a second pin 33, which is arranged with the plurality of first pins 32 along the third direction Z. The second pin 33 contacts the second conductive block 23 to realize the electrical connection between the second pin 33 and the second conductive block 23. The end of the second pin 33 away from the conductive connection portion 21 is connected to an external device.

[0049] The second conductive block 23 is located on the side of the plurality of first conductive blocks 22 facing the through hole 11 in the first direction X. That is, in the first direction X, the plurality of first conductive blocks 22 can be arranged in the same row, and the second conductive block 23 is arranged in another row. Compared with the arrangement of the second conductive block 23 among the plurality of first conductive blocks 22, the size of the conductive connection part 21 in the third direction Z can be reduced, thereby reducing the space occupied by the electrical connector 30 on the circuit board 20. In addition, the arrangement of the second conductive block 23 and the plurality of first conductive blocks 22 ensures that two adjacent first conductive blocks 22 in the third direction Z have sufficient spacing to meet the insulation safety distance requirements, and makes the areas of the first conductive block 22 and the second conductive block 23 as consistent as possible, ensuring the reliability of the connection between the first pin 32 and the first conductive block 22, the second pin 33 and the second conductive block 23.

[0050] The second conductive block 23 on the conductive connection part 21 is exposed on the surface of the conductive connection part 21 on the Y side in the second direction. In this way, the second pin 33 can be directly connected to the second conductive block 23, reducing the welding and crimping processes between the electrical connector 30 and the conductive connection part 21, and improving the installation efficiency of the electrical connector 30.

[0051] It should be noted that multiple first pins 32 and second pins 33 are arranged along the third direction Z, and a first pin 32 is in contact with a first conductive block 22, and a second pin 33 is in contact with a second conductive block 23. Therefore, the orthographic projection of the second conductive block 23 along the first direction X is located between the orthographic projections of two adjacent first conductive blocks 22 along the first direction X. Thus, the connection between the second pin 33 and the second conductive block 23 will not affect the connection between the first pin 32 and the first conductive block 22.

[0052] When multiple first pins 32 are arranged in two rows along the second direction Y, at least one row of first pins 32 and second pins 33 is located on the same side of the conductive connection portion 21 in the second direction Y. For example, one side of the conductive connection portion 21 in the second direction Y has one row of first pins 32 and second pins 33, while the other side of the conductive connection portion 21 in the second direction Y has only another row of first pins 32. Alternatively, the conductive connection portion 21 may have one row of first pins 32 and second pins 33 on opposite sides in the second direction Y. This fully utilizes the gap between adjacent first pins 32 in the same row to arrange the second pins 33, which is beneficial for miniaturizing the electrical connector 30.

[0053] like Figure 7 As shown, for example, the number of second conductive blocks 23 can be multiple, and the multiple second conductive blocks 23 are arranged at intervals along the third direction Z. Correspondingly, the number of second pins 33 is also multiple, and equal to the number of multiple second conductive blocks 23, so that each second pin 33 is in contact with a second conductive block 23.

[0054] like Figure 7 As shown, the housing 31 includes a bottom plate 311, a top plate 312, a first side plate 313, and a second side plate 314. The bottom plate 311 and the top plate 312 are spaced apart relative to each other along the second direction Y. The first side plate 313 and the second side plate 314 are spaced relative to each other along the third direction Z. The bottom plate 311 and the top plate 312 are connected by the first side plate 313 and the second side plate 314 and form a receiving space 316. The receiving space 316 houses the conductive connection part 21 and a plurality of first pins 32 and second pins 33. The bottom plate 311, the top plate 312, the first side plate 313, and the second side plate 314 can isolate the positions where the first pins 32 and the second pins 33 are in conductive contact with the conductive connection part 21 from other positions on the circuit board 20, which is beneficial to improving the insulation and protection performance of the electrical connection between the electrical connector 30 and the conductive connection part 21.

[0055] like Figure 4 As shown, when the conductive connection part 21 is located at the corner of the circuit board 20, the first side plate 313 is inserted into the first groove 24, and the second side plate 314 is located outside the edge of the circuit board 20. The first groove 24 and the first side plate 313 limit the electrical connector 30 and the conductive connection part 21 in the third direction Z. Figure 7 As shown, when the conductive connection part 21 is provided with a first groove 24 and a second groove 25 on both sides along the third direction Z, the first side plate 313 is inserted into the first groove 24 and the second side plate 314 is inserted into the second groove 25. The first side plate 313 and the first groove 24, as well as the second side plate 314 and the second groove 25, limit the electrical connector 30 and the conductive connection part 21 in the third direction Z.

[0056] In one embodiment, a portion of the first pin 32 and a portion of the second pin 33 are housed within the housing 31. Specifically, the ends of the first pin 32 and the second pin 33 facing the conductive connection 21 are located inside the housing 31. When both the first pin 32 and the second pin 33 are electrically connected to the conductive connection 21, the housing 31 can separate the locations where the first pin 32 and the second pin 33 are electrically connected from other locations on the circuit board 20, reducing the risk of leakage current and current ingress affecting other devices on the circuit board 20. The other portion of the first pin 32 and the other portion of the second pin 33 are located outside the housing 31. Specifically, the ends of the first pin 32 and the second pin 33 away from the conductive connection 21 are located outside the housing 31.

[0057] When the electrical connector 30 is plugged into the conductive connection part 21, the first pin 32 contacts the first conductive block 22 which is farther away from the through hole 11, and the second pin 33 contacts the second conductive block 23 which is closer. That is, the length of the second pin 33 extending into the housing 10 is shorter than the length of the first pin 32 extending into the housing 10. The contact between the second pin 33 and the second conductive block 23 does not affect the contact between the first pin 32 and the first conductive block 22.

[0058] In the first direction X, the end of the first pin 32 near the conductive connection 21 is further away from the through hole 11 than the end of the second pin 33 near the conductive connection 21. That is to say, in the first direction X, one end of the first pin 32 (the end used to connect to the conductive connection 21) protrudes more and is closer to the conductive connection 21 than one end of the second pin 33 (the end used to connect to the conductive connection 21).

[0059] Since the second conductive block 23 is located on the side of the first conductive block 22 facing the through hole 11 in the first direction X, when the second pin 33 contacts the second conductive block 23, it does not need to extend into the position between two adjacent first conductive blocks 22 in the third direction Z. The first pin 32 extends into the first conductive block 22 and contacts it. Thus, when the electrical connector 30 is plugged into the conductive connection part 21, the first pin 32 contacts the first conductive block 22 further away, and the second pin 33 contacts the second conductive block 23 closer to it. That is, the length of the second pin 33 extending into the housing 10 is shorter than the length of the first pin 32 extending into the housing 10. There is no second pin 33 between two adjacent first conductive blocks 22 in the third direction Z, ensuring the safety distance between two adjacent first conductive blocks 22 and reducing the risk of arcing and leakage.

[0060] The end of the first pin 32 furthest from the conductive connection 21 and the end of the second pin 33 furthest from the conductive connection 21 are flush. This arrangement makes the ends of the first pin 32 and the second pin 33 furthest from the conductive connection 21 more regular. At the same time, when the electrical connector 30 connects to an external device, the first pin 32 and the second pin 33 can be aligned synchronously, preventing individual pins from contacting the external device first or uneven force. This effectively prevents the first pin 32 and the second pin 33 from bending or deforming when connected to an external device.

[0061] In summary, along the first direction X, the size of the first pin 32 is larger than the size of the second pin 33. Thus, the first conductive block 22 and the second conductive block 23 arranged along the first direction X can be provided on the conductive connection part 21, making full use of the space of the conductive connection part 21 in the first direction X.

[0062] Please see Figure 8 , Figure 8 This is an exploded view of another electrical connector 30 provided in an embodiment of this application. Both the first pin 32 and the second pin 33 are metal pins. In one embodiment, the first pin 32 has a first connecting portion 321 and a first abutting portion 322, which are arranged along a first direction X and connected as a single unit. The first connecting portion 321 connects the first abutting portion 322 to an external device. The first connecting portion 321 extends along the first direction X, and the first abutting portion 322 is bent relative to the first connecting portion 321. The first abutting portion 322 can elastically abut against the first conductive block 22. The first abutting portion 322 can be pressed against the first conductive block 22 by the housing 31 and the conductive connecting portion 21, resulting in a good electrical connection between the first pin 32 and the first conductive block 22.

[0063] For example, the first pin 32 also has a first stop 323, which is fixedly connected to the end of the first connecting portion 321 away from the first abutment portion 322. The first stop 323 is used for connection with an external device, and the first stop 323, the first connecting portion 321, and the first abutment portion 322 can be integrally formed. For example, the first stop 323 can be a cylindrical or hollow cylindrical structure, the first connecting portion 321 can be a solid structure, and the outer diameter of the first stop 323 is larger than the maximum cross-sectional dimension of the first connecting portion 321 perpendicular to the first direction X.

[0064] The second pin 33 has a second connecting portion 331 and abutting portion 332, which are arranged along a first direction X and connected as a single unit. The second connecting portion 331 connects the second abutting portion 332 to an external device and extends along the first direction X. The second abutting portion 332 is bent relative to the second connecting portion 331. Specifically, in the first direction X, the second abutting portion 332 is closer to the through hole 11 than the first abutting portion 322. The second abutting portion 332 can elastically abut against the second conductive block 23. Under the constraint of the housing 31 and the conductive connecting portion 21, the second abutting portion 332 can be pressed firmly against the second conductive block 23, resulting in a good electrical connection between the second pin 33 and the second conductive block 23.

[0065] For example, the second pin 33 also has a second stop 333, which is fixedly connected to the end of the second connecting portion 331 away from the second abutment portion 332. The second stop 333 is used for connection to an external device. The second stop 333, the second connecting portion 331, and the second abutment portion 332 can be integrally formed. For example, the second stop 333 can be a cylindrical or hollow cylindrical structure, the second connecting portion 331 can be a solid structure, and the outer diameter of the second stop 333 is larger than the maximum cross-sectional dimension of the second connecting portion 331 perpendicular to the first direction X.

[0066] Please see Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of the structure of an electrical connector 30 provided in an embodiment of this application. Figure 10 for Figure 9The diagram shows an exploded view of the electrical connector 30. The electrical connector 30 also includes a first fixing plate 34, which is mounted on a housing (not shown). The first fixing plate 34 has a receiving groove 341, with a through hole (not shown) on a portion of its sidewall. The opening of the receiving groove 341 faces outwards from the housing in the first direction X, and the bottom 342 of the receiving groove 341 has a first opening 343. A portion of the housing 31 passes through the first opening 343 and extends into the housing to be inserted into the conductive connection portion. Another portion of the housing 31 is located within the receiving groove 341 and contacts the bottom 342 of the receiving groove 341. The portion of the first fixing plate 34 without the receiving groove 341 is located outside the housing and is fixedly connected to the housing. A portion of the housing 31 extends into the box body through the receiving groove 341 and the first opening 343 and is inserted and fixed to the conductive connection part. Since the first opening 343 is set on the bottom 342 of the receiving groove 341, and another portion of the housing 31 is located in the receiving groove 341 and in contact with the bottom 342 of the receiving groove 341, that is, the bottom 342 of the receiving groove 341 forms the first opening 343. The area of ​​the first opening 343 is smaller than the area of ​​the bottom 342 of the receiving groove 341. The bottom 342 of the receiving groove 341, which does not form the first opening 343, restricts the housing 31 from continuing to extend into the box body. This makes the housing 31 located in the receiving groove 341 contact the bottom 342 of the receiving groove 341, which plays a limiting role on the housing 31, restricting the housing 31 from extending into the box body without restriction, and reducing or avoiding mechanical impact of the housing 31 on the circuit board 20. In addition, the side wall of the receiving groove 341 located inside the box can provide a certain support for the shell 31 inside the box, reduce the force exerted by the shell 31 on the conductive connection part along the second direction Y, and effectively prevent the conductive connection part from bending or deforming, thereby ensuring the stability of the electrical connection between the first pin 32 and the second pin 33 and the conductive connection part.

[0067] Please refer to the following: Figure 11 , Figure 11 This is a cross-sectional structural diagram of an electrical connector 30 provided in an embodiment of this application. For example, the end of the housing 31 away from the conductive connection portion in the first direction X is provided with a protruding edge 315. The protruding edge 315 can protrude relative to the outer surface of the housing 31. In this way, after the protruding edge 315 passes through the opening of the receiving groove 341, it contacts the bottom 342 of the receiving groove 341 and is located in the receiving groove 341, thereby limiting the housing 31.

[0068] Please see Figures 9 to 11For example, the electrical connector 30 also includes a mounting base 35, which is disposed on the side of the housing 31 opposite to the conductive connection portion. A portion of the mounting base 35 is received within a receiving groove 341 to mate with the housing 31. The mounting base 35 also receives a plurality of first pins 32 and second pins 33. Specifically, the ends of the first pins 32 and the second pins 33 that are away from the conductive connection portion are both received within the mounting base 35.

[0069] The mounting base 35 is provided with a plurality of spaced through holes 351, which penetrate both opposite sides of the mounting base 35 along the first direction X. The number of through holes 351 is equal to the sum of the number of first pins 32 and second pins 33. Each first pin 32 is housed in one through hole 351, and each second pin 33 is housed in one through hole 351. Specifically, the end of each first pin 32 away from the conductive connection is housed in one through hole 351, and the end of each second pin 33 away from the conductive connection is also housed in one through hole 351. In this way, the ends of the first pins 32 and the second pins 33 away from the conductive connection can be separated, ensuring the insulation protection performance between two adjacent first pins 32 and between the first pins 32 and the second pins 33.

[0070] It is understandable that when the electrical connector 30 does not have multiple second pins 33, the number of multiple through holes 351 is equal to the number of multiple first pins 32.

[0071] For example, the first stop portion 323 of the first pin 32 is housed in a through hole 351, and the second stop portion 333 of the second pin 33 is housed in a through hole 351. That is to say, the end of the first pin 32 away from the conductive connection portion is the end of the first stop portion 323 away from the conductive connection portion, and the end of the second pin 33 away from the conductive connection portion is the end of the second stop portion 333 away from the conductive connection portion.

[0072] Please refer to the following: Figure 12 , Figure 12 for Figure 11The diagram shows an enlarged view of point A in the electrical connector 30. The through-hole 351 includes a first segment 3511 and a second segment 3512 that are connected. The first segment 3511 is closer to the conductive connection portion than the second segment 3512. The central axis of the first segment 3511 can coincide with the central axis of the second segment 3512, and the central axes extend along a first direction X. The diameter of the first segment 3511 is larger than the diameter of the second segment 3512, thus forming a stepped surface 3513 between the first segment 3511 and the second segment 3512. The stepped surface 3513 has an annular structure. In the first direction X, the end of the first pin 32 away from the conductive connection portion is located on the side of the second segment 3512 facing the first segment 3511 and is received within the corresponding first segment 3511. In the first direction X, the end of the second pin 33 away from the conductive connection portion is located on the side of the second segment 3512 facing the first segment 3511 and is received within the corresponding first segment 3511. That is to say, the outer diameter of the first stop portion 323 is larger than the diameter of the second hole segment 3512, the first stop portion 323 is located on the side of the second hole segment 3512 facing the first hole segment 3511, and is received within the corresponding first hole segment 3511. The outer diameter of the second stop portion 333 is larger than the diameter of the second hole segment 3512, the second stop portion 333 is located on the side of the second hole segment 3512 facing the first hole segment 3511 in the first direction X, and is received within the corresponding first hole segment 3511.

[0073] Since the electrical connector 30 is connected to the conductive connection part by plugging, during the plugging process, when the first pin 32 and the second pin 33 are plugged into the conductive connection part, the conductive connection part applies a frictional force towards the outside of the housing to the first pin 32 and the second pin 33, which can easily cause the first pin 32 to detach from the first conductive block 22 and the second pin 33 to detach from the second conductive block 23, affecting the reliability of the electrical connection between the electrical connector 30 and the conductive connection part. In this embodiment, a stepped surface 3513 is formed between the first hole segment 3511 and the second hole segment 3512. When multiple first pins 32 move out of the housing, the stepped surface 3513 can prevent the end of the first pin 32 away from the conductive connection part from entering the second hole segment 3512, preventing the first pin 32 from continuing to move out of the housing, so that the end of the first pin 32 away from the conductive connection part is always located in the first hole segment 3511, ensuring the reliability of the contact between the first pin 32 and the first conductive block 22. When the second pin 33 moves out of the housing, the stepped surface 3513 also prevents the end of the second pin 33 away from the conductive connection from entering the second hole section 3512, so that the end of the second pin 33 away from the conductive connection is always contained in the first hole section 3511, and the end of the first pin 32 away from the conductive connection is always contained in the first hole section 3511, ensuring the reliability of the contact between the second pin 33 and the second conductive block 23.

[0074] Please continue reading. Figure 10 and Figure 11 The electrical connector 30 also includes a second fixing plate 36, which is located on the side of the first fixing plate 34 facing away from the housing. The second fixing plate 36 has a receiving groove 361, the opening of which faces the first fixing plate 34 in the first direction X. The receiving groove 361 receives a portion of the mounting base 35, and the other portion of the mounting base 35 is located at the edge of the opening of the receiving groove 361. Thus, the edge of the opening of the receiving groove 361 can limit the mounting base 35 in the first direction X. The bottom of the receiving groove 361 is located on the side of the second fixing plate 36 facing away from the first fixing plate 34. The bottom of the receiving groove 361 has a second opening 362, which is used to allow external devices to extend into the mounting base 35 and connect with a plurality of first pins 32 and second pins 33 inside the mounting base 35. For example, the size of the second opening 362 can be equal to or smaller than the bottom size of the receiving groove 361. In this way, the mounting base 35 can contact the bottom of the receiving groove 361, and the bottom of the receiving groove 361 can limit the mounting base 35 in the first direction X.

[0075] After the second fixing plate 36 is connected to the first fixing plate 34, the mounting base 35 in the receiving groove 361 can be connected and fixed together with the housing 31 mounted on the first fixing plate 34. In addition, the receiving groove 361 on the second fixing plate 36 can fix and support the mounting base 35, ensuring that the mounting base 35 and the housing 31 have good alignment. Since the first pin 32 and the second pin 33 are simultaneously received in the housing 31 and the mounting base 35, the connection between the housing 31 and the mounting base 35 has good alignment, which can reduce or avoid the first pin 32 and the second pin 33 bending at the same time.

[0076] During assembly, the housing 31 can be first installed together with the first fixing plate 34. For example, the housing 31 can be inserted into the receiving groove 341 from the opening of the groove, and the protruding edge 315 of the housing 31 can be in contact with the bottom 342 of the receiving groove 341 to limit the housing 31. Then, the mounting base 35 can be installed together with the second fixing plate 36. For example, the mounting base 35 can be inserted into the receiving groove 361 from the opening of the groove, so that a part of the mounting base 35 is located inside the receiving groove 361 and the other part of the mounting base 35 is located outside the receiving groove 361. Then, the other part of the mounting base 35 can be inserted into the receiving groove 341. After the first fixing plate 34 and the second fixing plate 36 are connected and fixed, the housing 31, the first fixing plate 34, the mounting base 35 and the second fixing plate 36 are assembled together.

[0077] One of the first fixing plate 34 and the second fixing plate 36 has a bent portion 363, which is bent relative to one of the first fixing plate 34 and the second fixing plate 36. The other of the first fixing plate 34 and the second fixing plate 36 has a notch 344. The bent portion 363 is fastened to the other of the first fixing plate 34 and the second fixing plate 36 and is partially located within the notch 344. The first fixing plate 34 and the second fixing plate 36 are connected together by the bent portion 363. Compared with the screw fixing method, the connection method of the bent portion 363 is simple and easy to implement, and can reduce the number of parts in the electrical connector 30, which is beneficial to reducing costs. In addition, by the bent portion 363 being engaged at the notch 344, misalignment between the first fixing plate 34 and the second fixing plate 36 is reduced or avoided.

[0078] Please see Figure 9 and Figure 10 For example, the first fixing plate 34 has a notch 344, and the second fixing plate 36 has a bent portion 363. The bent portion 363 can extend into the notch 344. In this way, the first fixing plate 34 can be displaced relative to the second fixing plate 36 in the third direction Z, thereby effectively preventing the first pin 32 and the second pin 33, which are simultaneously housed in the mounting base 35 and the housing 31, from bending. Part of the bent portion 363 passes through the notch 344 and abuts against the side of the first fixing plate 34 facing away from the second fixing plate 36, thereby fastening the first fixing plate 34 and the second fixing plate 36 together and limiting the first fixing plate 34 and the second fixing plate 36 in the first direction X.

[0079] like Figure 10As shown, for example, the first fixing plate 34 has a first mounting hole 345, and the second fixing plate 36 has a second mounting hole 364. The first mounting hole 345 and the second mounting hole 364 are directly opposite each other in the first direction X. Both the first mounting hole 345 and the second mounting hole 364 are oblong holes. The electrical connector 30 also includes a fastener 37, which includes a head 371 and a rod 372. The head 371 is located at one end of the rod 372 and is situated on the side of the second fixing plate 36 away from the first fixing plate 34. The rod 372 passes through the second mounting hole 364 and the first mounting hole 345 and is connected and fixed to the housing. There are gaps between the rod 372 and the second mounting hole 364, and between the rod 372 and the first mounting hole 345. The opening area of ​​the second mounting hole 364 is larger than the orthographic projection of the rod 372 along its axial direction. Both the first mounting hole 345 and the second mounting hole 364 provide space for the rod 372 to move. After the rod 372 passes through the first mounting hole 345 and the second mounting hole 364, the rod 372 can move within the first mounting hole 345 and the second mounting hole 364 to adjust the mounting position of the rod 372 on the box, so that the first fixing plate 34 and the second fixing plate 36 can properly fix the mounting frame on the box after absorbing the tolerance.

[0080] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power conversion device, characterized in that, The device includes a housing, a circuit board, a power module, a controller, and an electrical connector. The housing contains the circuit board, the power module, and the controller. The housing has through holes. The power module and / or the controller are mounted on the surface of the circuit board. The circuit board is provided with a conductive connection part. The conductive connection part and the through hole are arranged opposite to each other in a first direction. A plurality of first conductive blocks are provided on the surface of the conductive connection part in a second direction. The plurality of first conductive blocks are electrically connected to the power module and / or the controller through the traces of the circuit board. The plurality of first conductive blocks are arranged along a third direction. The electrical connector includes a housing and a plurality of first pins. A portion of the housing passes through the through hole and is inserted and fixed to the conductive connection portion. The plurality of first pins correspond one-to-one with the plurality of first conductive blocks. The plurality of first pins are housed within the housing and are arranged along the third direction. Each first pin contacts a first conductive block. The end of the first pin away from the conductive connection portion is connected to an external device. The housing is inserted into the conductive connection portion along the first direction. The first direction and the second direction are perpendicular to the third direction.

2. The power conversion device according to claim 1, characterized in that, The conductive connection portion has a plurality of first conductive blocks on both opposite surfaces in the second direction. The plurality of first pins are arranged in two rows along the second direction, and the two rows of first pins respectively contact the first conductive blocks on the opposite sides of the conductive connection portion along the second direction.

3. The power conversion device according to claim 1 or 2, characterized in that, The conductive connection portion is further provided with a second conductive block on one side of the second direction. The second conductive block is electrically connected to the power module and / or the controller through the traces of the circuit board. At least a portion of the second conductive block is located between two adjacent first conductive blocks in the third direction. The second conductive block is located on the side of the plurality of first conductive blocks facing the through hole in the first direction. The electrical connector further includes a second pin, which is arranged along the third direction with the plurality of first pins. The second pin contacts the second conductive block, and the end of the second pin away from the conductive connection portion is connected to an external device.

4. The power conversion device according to claim 3, characterized in that, In the first direction, the end of the first pin near the conductive connection is further away from the through hole than the end of the second pin near the conductive connection.

5. The power conversion device according to claim 4, characterized in that, The end of the first pin away from the conductive connection portion and the end of the second pin away from the conductive connection portion are flush.

6. The power conversion device according to any one of claims 3-5, characterized in that, When the plurality of first pins are arranged in two rows along the second direction, at least one row of first pins and second pins are located on the same side of the conductive connection portion in the second direction.

7. The power conversion device according to any one of claims 3-4, characterized in that, The housing includes a bottom plate, a top plate, a first side plate, and a second side plate. The bottom plate and the top plate are arranged at intervals relative to each other along the second direction, and the first side plate and the second side plate are arranged at intervals relative to each other along the third direction. The bottom plate and the top plate are connected by the first side plate and the second side plate to form a receiving space. The receiving space contains the conductive connection part, the plurality of first pins, and the second pins.

8. The power conversion device according to claim 7, characterized in that, The circuit board has a first groove recessed from the edge of the circuit board along the first direction, and the conductive connection portion is provided on one side of the first groove along the third direction. The first side plate is inserted into the first groove.

9. The power conversion device according to claim 8, characterized in that, The circuit board is further provided with a second groove recessed from the same edge of the circuit board along the first direction. The second groove and the first groove are spaced apart along the third direction. The conductive connection portion is provided between the second groove and the first groove. The second side plate is inserted into the second groove.

10. The power conversion device according to any one of claims 3-9, characterized in that, The electrical connector further includes a first fixing plate mounted on the housing. The first fixing plate has a receiving groove. A portion of the sidewall of the receiving groove has a through hole. The opening of the receiving groove faces outward from the housing in the first direction. The bottom of the receiving groove has a first opening. A portion of the housing passes through the first opening and extends into the housing. Another portion of the housing is located in the receiving groove and contacts the bottom of the receiving groove.

11. The power conversion device according to claim 10, characterized in that, The electrical connector further includes a mounting base, which is disposed on the side of the housing opposite to the conductive connection portion and partially housed in the receiving groove. The mounting base has a plurality of through holes spaced apart, which penetrate both opposite sides of the mounting base along the first direction. The number of the plurality of through holes is equal to the sum of the number of the plurality of first pins and second pins. The end of each first pin away from the conductive connection portion is housed in one of the through holes, and the end of each second pin away from the conductive connection portion is housed in one of the through holes.

12. The power conversion device according to claim 11, characterized in that, The perforation includes a first segment and a second segment that are connected. The first segment is closer to the conductive connection portion than the second segment, and the diameter of the first segment is larger than the diameter of the second segment. In the first direction, the end of the first pin away from the conductive connection portion is located on the side of the second segment facing the first segment and is received within the corresponding first segment. The end of the second pin away from the conductive connection portion is located on the side of the second segment facing the first segment and is received within the corresponding first segment.

13. The power conversion device according to claim 11 or 12, characterized in that, The electrical connector further includes a second fixing plate, which is disposed on the side of the first fixing plate away from the housing. The second fixing plate has a receiving groove, the opening of which faces the first fixing plate in the first direction. The receiving groove receives a portion of the mounting base, and another portion of the mounting base is located at the edge of the opening of the receiving groove. The bottom of the receiving groove has a second opening for an external device to extend into the mounting base and connect with the plurality of first pins and second pins in the mounting base.

14. The power conversion device according to claim 13, characterized in that, One of the first fixing plate and the second fixing plate is provided with a bent portion, which is bent relative to one of the first fixing plate and the second fixing plate. The other of the first fixing plate and the second fixing plate is provided with a notch. The bent portion is fastened to the other of the first fixing plate and the second fixing plate and is partially located within the notch.

15. An electrical connector, characterized in that, The electrical connector includes a housing and a plurality of first pins, the plurality of first pins being housed within the housing and arranged at intervals.

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