Power conversion device and power supply apparatus

Abstract

The present application relates to the technical field of power supplies. Provided are a power conversion device and a power supply apparatus. The power conversion device comprises a first circuit board, a fan, and an input terminal, an AC / DC power conversion circuit, a DC / DC power conversion circuit and an output terminal that are disposed on the first circuit board. The fan is located at a first edge of the first circuit board, and both the input terminal and the output terminal are located at a second edge opposite the first edge. The circuit board has an air passage region, and a first region and a second region that are located on opposite sides of the air passage region, wherein the air passage region extends from the side of the circuit board provided with the fan to the side of the circuit board provided with the output terminal; and the arrangement direction of the first region and the second region is parallel to the arrangement direction of the input terminal and the output terminal. One portion of the AC / DC power conversion circuit is located in the first region, and the other portion of the AC / DC power conversion circuit and the DC / DC power conversion circuit are located in the second region. The present application can optimize the layout of the power conversion device and can improve the heat dissipation effect.

Description

Power conversion devices and power supply equipment

[0001] This application claims priority to Chinese Patent Application No. 202520301605.8, filed on February 21, 2025, entitled "Power Conversion Device and Power Supply Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of power supply technology, and in particular to a power conversion device and power supply equipment. Background Technology

[0003] A power conversion device is a modular power supply component that integrates various components, such as heat dissipation components, several functional devices (e.g., inductors, transformers, MOSFETs), input modules, filtering modules, output modules, and several printed circuit board assemblies, to provide a stable and reliable DC voltage. The function of a power conversion device is to convert the input power (which may be AC ​​or DC) into a stable DC power supply, and it possesses multiple protection functions such as short-circuit protection, overload protection, and over-temperature protection.

[0004] Power conversion devices, due to their numerous heat-generating components such as power devices, and the need for higher power density and integration, face increasingly stringent heat dissipation requirements. These devices must meet effective heat dissipation to ensure reliable and stable operation of the components. However, current power conversion devices primarily dissipate heat from the power devices through the side walls of the device casing, leaving significant room for improvement in heat dissipation efficiency.

[0005] Utility Model Content

[0006] This application provides a power conversion device and a power supply equipment. The purpose is to optimize the layout of the power conversion device, thereby improving its heat dissipation performance.

[0007] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0008] On one hand, this application provides a power conversion device, which includes a first circuit board, a fan, and an input terminal, an AC / DC power conversion circuit, a DC / DC power conversion circuit, and an output terminal disposed on the first circuit board. The input terminal is electrically connected to the input terminal of the AC / DC power conversion circuit, the output terminal of the AC / DC power conversion circuit is electrically connected to the input terminal of the DC / DC power conversion circuit, and the output terminal of the DC / DC power conversion circuit is electrically connected to the output terminal.

[0009] The first circuit board has opposing first and second edges, with a fan located at the first edge and input and output terminals located at the second edge. The circuit board has a draft zone, and first and second zones located on opposite sides of the draft zone, extending from the side of the circuit board with the fan to the side with the output terminals. The arrangement of the first and second zones is parallel to the arrangement of the input and output terminals. A portion of the AC / DC power conversion circuit is located in the first zone, and another portion of the AC / DC power conversion circuit and the DC / DC power conversion circuit are located in the second zone. The draft zone includes the gap between the portion of the AC / DC power conversion circuit located in the first zone and the portion of the AC / DC power conversion circuit located in the second zone, as well as the gap between the portion of the AC / DC power conversion circuit located in the first zone and the DC / DC power conversion circuit.

[0010] The power conversion device provided in this application can convert input electrical energy into power through the cooperation of input terminals, AC / DC power conversion circuit, DC / DC power conversion circuit, and output terminals, thereby providing the required electrical energy to the device to be powered. By placing a fan at the first edge of a first circuit board and placing both the input and output terminals at the second edge, and extending the airflow zone from the side of the circuit board with the fan to the side with the output terminals, the airflow zone includes a gap (hereinafter referred to as a first gap) between the portion of the AC / DC power conversion circuit located in the first zone and the portion of the AC / DC power conversion circuit located in the second zone, and a gap (hereinafter referred to as a second gap) between the portion of the AC / DC power conversion circuit located in the first zone and the DC / DC power conversion circuit. Thus, when the fan air enters the airflow zone, the airflow zone can form an intermediate air channel. Combined with heat dissipation at the side walls of the housing, this allows for better heat dissipation of the power devices distributed on opposite sides of the airflow zone, both in the first and second zones. For example, the portions of the AC / DC power conversion circuit located in the first zone and the portions located in the second zone can be effectively cooled through the first gap in the airflow zone; similarly, the portions of the AC / DC power conversion circuit located in the first zone and the DC / DC power conversion circuit can be effectively cooled through the second gap in the airflow zone. Through the layout described above in this application, the power conversion device can optimize the arrangement of its components, thereby improving its heat dissipation performance.

[0011] In one embodiment of this application, the power inductor of the AC / DC power conversion circuit is located in a first region, and the electron tube connected to the current input terminal of the power inductor is located in the first region; the power tube connected to the current output terminal of the power inductor is located in a second region. The power inductor is located on the side of the input terminal facing the first edge, and the electron tube connected to the current input terminal of the power inductor is located on the side of the power inductor facing the first edge. The gap between the portion of the AC / DC power conversion circuit located in the first region and the portion of the AC / DC power conversion circuit located in the second region includes: the gap between the electron tube connected to the current input terminal of the power inductor and the power tube connected to the current output terminal of the power inductor; the gap between the portion of the AC / DC power conversion circuit located in the first region and the DC / DC power conversion circuit includes: the gap between the power inductor and the DC / DC power conversion circuit.

[0012] This application, through the aforementioned layout, allows the electron tube connected to the current input terminal of the power inductor and the power transistor connected to the current output terminal of the power inductor to be closer to the fan relative to the input terminal. By including the gap between the electron tube connected to the current input terminal of the power inductor and the power transistor connected to the current output terminal of the power inductor in the airflow area, the electron tube and power transistor of the AC / DC power conversion circuit can achieve effective heat dissipation through this gap and the fan. By including the gap between the power inductor and the DC / DC power conversion circuit in the airflow area, combined with the fan, effective heat dissipation of the DC / DC power conversion circuit and the power inductor is achieved.

[0013] In one embodiment of this application, the power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer in the DC / DC power conversion circuit are both located on the side of the transformer facing the first edge. Both the power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer in the DC / DC power conversion circuit have gaps between them and the transformer.

[0014] This application arranges the power transistors connected to the current output terminal of the power inductor and the power transistors connected to the primary side of the transformer in the DC / DC power conversion circuit as described above. On one hand, this arrangement allows the power transistors connected to the current output terminal of the power inductor and the primary side of the transformer in the DC / DC power conversion circuit to be closer to the fan relative to the transformer. On the other hand, the gaps between the power transistors connected to the current output terminal of the power inductor and the transformer, and between the power transistors connected to the primary side of the transformer and the transformer, increase the number of heat dissipation airflow channels. This application improves the heat dissipation efficiency of the power conversion device by arranging the corresponding power transistors closer to the fan and by implementing multiple heat dissipation airflow channels.

[0015] In one embodiment of this application, the power conversion device further includes a second circuit board, which is fixedly connected to the first circuit board, and the surface of the second circuit board is perpendicular to the surface of the first circuit board. A power transistor connected to the current output terminal of the power inductor and a power transistor connected to the primary side of the transformer are both fixedly connected to the second circuit board; and at least one of the main body portion of the power transistor connected to the current output terminal of the power inductor and the main body portion of the power transistor connected to the primary side of the transformer is located on the side of the second circuit board facing the first edge.

[0016] This application, through the aforementioned layout of the second circuit board, allows for the prior fixation of both the power transistors connected to the current output terminal of the power inductor and those connected to the primary side of the transformer onto the second circuit board, before the second circuit board is fixed to the first circuit board. Compared to directly fixing the power transistors connected to the current output terminal of the power inductor and those connected to the primary side of the transformer onto the first circuit board, these components are less susceptible to interference from other components on the first circuit board during assembly, making assembly more convenient. Furthermore, the perpendicularity of the second circuit board surface to the first circuit board surface reduces the heat dissipation burden on the first circuit board and improves heat dissipation efficiency. Furthermore, at least one of the power transistor body connected to the current output terminal of the power inductor and the power transistor body connected to the primary side of the transformer is disposed on the side of the second circuit board facing the first edge. In this way, the power transistor body connected to the current output terminal of the power inductor and / or the power transistor body connected to the primary side of the transformer is closer to the fan relative to the second circuit board, which is beneficial for heat dissipation of the power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer.

[0017] In one embodiment of this application, the fan is located in the second zone. The fan is located on the side away from the transformer of the power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer. The fan is used to blow air toward the power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer.

[0018] This application places the fan in the second zone, with the fan positioned on the side of the first and second power transistors facing away from the transformer. In this way, the first and second power transistors are closer to the fan in terms of layout compared to the transformer and output terminals. The fan blows air towards the first and second power transistors, which significantly improves the heat dissipation effect of the first and second power transistors.

[0019] In one embodiment of this application, the power transistor connected to the secondary side of the transformer is located in the second zone, and there is a gap between the power transistor connected to the secondary side of the transformer and the transformer. The power transistor connected to the secondary side of the transformer is located on the side of the transformer facing the windward area; or, the power transistor connected to the secondary side of the transformer is located on the side of the transformer away from the windward area.

[0020] This application, through the above layout, can effectively utilize the space of the second area of ​​the first circuit board. A gap exists between the power transistor connected to the secondary side of the transformer and the transformer, allowing the power transistor connected to the secondary side of the transformer to dissipate heat through the side of the transformer facing the airflow area or away from the airflow area.

[0021] In one embodiment of this application, the power conversion device further includes a third circuit board, which is fixedly connected to the first circuit board and the surface of the third circuit board is perpendicular to the surface of the first circuit board; the power transistor connected to the secondary side of the transformer is fixedly connected to the third circuit board.

[0022] This application, by providing a third circuit board, allows the third power transistor to be first mounted onto the third circuit board, and then the third circuit board with the third power transistor fixedly connected to it to the first circuit board. Compared to directly mounting the third power transistor onto the first circuit board, on the one hand, the third power transistor is less affected by other components connected to the first circuit board during assembly, which facilitates assembly; on the other hand, the provision of the third circuit board reduces the heat dissipation burden on the first circuit board and improves the reliability of the power conversion device.

[0023] In one embodiment of this application, the output terminal of the transformer has a pin, with one end of the pin facing away from the transformer and toward a power transistor connected to the secondary side of the transformer. The pin is connected to the power transistor connected to the secondary side of the transformer.

[0024] This application sets the end of the pin facing away from the transformer to face the power transistor connected to the secondary side of the transformer, and the output terminal of the transformer is connected to the power transistor connected to the secondary side of the transformer through its pin. Compared with the transformer being connected to the power transistor connected to the secondary side of the transformer through the first circuit board, this layout can shorten the trace distance and reduce the trace complexity of the first circuit board.

[0025] In one embodiment of this application, the power conversion device further includes a first capacitor, which is electrically connected to the output terminal of the AC / DC power conversion circuit and the input terminal of the DC / DC power conversion circuit. The first capacitor is located in a first region and is located on the side of the power inductor facing the first edge. There is a gap between the power inductor and the first capacitor, and there is also a gap between the electron tube connected to the current input terminal of the power inductor and the first capacitor.

[0026] This application places the first capacitor in the first region, specifically on the side of the power inductor facing the first edge. This placement ensures that the first capacitor does not obstruct heat dissipation from components such as the power inductor, and effectively utilizes the space on the first circuit board. Furthermore, gaps exist between the power inductor and the first capacitor, as well as between the electron tube connected to the current input terminal of the power inductor and the first capacitor. These gaps serve as airflow channels, improving heat dissipation.

[0027] In one embodiment of this application, the power conversion device further includes an auxiliary source circuit for supplying power to the fan, and the auxiliary source circuit is electrically connected to the first capacitor. The auxiliary source circuit is located in the second region and is situated between the power inductor of the AC / DC power conversion circuit and the transformer of the DC / DC power conversion circuit; a gap exists between the auxiliary source circuit and the transformer of the DC / DC power conversion circuit.

[0028] This application provides power to the fan by incorporating an auxiliary power source circuit. By placing the auxiliary power source circuit in the second zone, and positioning it between the power inductor of the AC / DC power conversion circuit and the transformer of the DC / DC power conversion circuit, the auxiliary power source circuit is closer to the airflow area than the transformer. This layout improves the heat dissipation of the auxiliary power source circuit. Furthermore, by creating a gap between the auxiliary power source circuit and the transformer of the DC / DC power conversion circuit, fan airflow can enter this gap, further enhancing the heat dissipation efficiency of both the auxiliary power source circuit and the transformer.

[0029] In one embodiment of this application, the power conversion device further includes an input filter circuit. The input terminal of the input filter circuit is electrically connected to the input terminal, and the output terminal of the input filter circuit is electrically connected to the AC / DC power conversion circuit. The input filter circuit is located in the first region and is located between the input terminal and the power inductor of the AC / DC power conversion circuit. There is a gap between the input filter circuit and the power inductor.

[0030] Since the input terminal of the input filter circuit needs to be electrically connected to the input terminal, and the output terminal of the input filter circuit needs to be electrically connected to the AC / DC power conversion circuit, this application places the input filter circuit in the first area and between the input terminal and the power inductor. This facilitates the electrical connection between the input filter circuit and the input terminal and the AC / DC power conversion circuit, thereby shortening the wiring distance of the power conversion device and reducing the complexity of the wiring connection.

[0031] In one embodiment of this application, a partition plate is fixed on the first circuit board. The partition plate is located in the air passage area, and the input filter circuit and the power transistors connected to the secondary side of the transformer of the DC / DC power conversion circuit are distributed on different sides of the partition plate.

[0032] This application, by setting a partition plate and placing it in the airflow area, effectively utilizes the space of the airflow area. It also divides the airflow passing through the airflow area into two parts: one part flows through the partition plate towards the third power transistor, and the other part flows through the partition plate towards the input filter circuit, enabling independent heat dissipation for the input filter circuit and the third power transistor. Furthermore, the partition plate separates the input filter circuit and the third power transistor, which to some extent blocks the propagation path of electromagnetic interference signals between the input filter circuit and the third power transistor, thereby reducing electromagnetic interference within the power conversion device and improving its electromagnetic compatibility.

[0033] In one embodiment of this application, the power conversion device further includes an output filter circuit. The input terminal of the output filter circuit is electrically connected to the output terminal of the DC / DC power conversion circuit, and the output terminal of the output filter circuit is electrically connected to the output terminal. The output filter circuit is located in the second region and is disposed between the output terminal and the transformer of the DC / DC power conversion circuit, with a gap between the output filter circuit and the transformer.

[0034] Since the input terminal of the output filter circuit needs to be electrically connected to the DC / DC power conversion circuit, and the output terminal of the output filter circuit needs to be electrically connected to the output terminal, this application places the output filter circuit in the second area and between the output terminal and the transformer of the DC / DC power conversion circuit. This facilitates the electrical connection between the output filter circuit and the output terminal and the DC / DC power conversion circuit, shortens the wiring distance of the power conversion device, and reduces the complexity of the wiring connection.

[0035] In one embodiment of this application, the power conversion device further includes a housing with a cavity, in which a first circuit board, a fan, an input terminal, an AC / DC power conversion circuit, a DC / DC power conversion circuit, and an output terminal are all disposed. The inner wall of the housing has a protrusion, and the first circuit board is disposed on the side of the protrusion facing away from the housing. The power conversion device also includes a screw connector, one end of which passes through the housing and the protrusion in sequence and connects to the first circuit board. The protrusion is made of insulating material.

[0036] In this application, an insulating protrusion is provided on the inner wall of the housing, and the first circuit board is located on the side of the protrusion away from the housing. In this way, the protrusion is provided between the inner wall of the housing and the first circuit board. The protrusion can support the first circuit board and also insulate it from the circuit of the first circuit board. In addition, the protrusion can also separate the first circuit board from the housing by a certain distance, increase the heat dissipation area of ​​the first circuit board, and improve the heat dissipation efficiency of the first circuit board.

[0037] On the other hand, this application provides a power supply device, which includes a cabinet and a plurality of power conversion devices in any of the above-described possible ways, the plurality of power conversion devices being located inside the cabinet and connected in parallel.

[0038] Since the power supply equipment of this application adopts the power conversion device in any of the above-mentioned feasible methods, the power supply equipment can at least optimize the layout of the power conversion device and improve the heat dissipation effect of the power conversion device. Attached Figure Description

[0039] Figure 1 is a schematic diagram of the power supply equipment provided in an embodiment of this application;

[0040] Figure 2 is a schematic diagram of the electrical connection relationship of the power conversion device provided in the embodiment of this application;

[0041] Figure 3 is one of the schematic diagrams of the layout structure of the power conversion device provided in the embodiment of this application;

[0042] Figure 4 is a schematic diagram of the structure of the first circuit board provided in an embodiment of this application;

[0043] Figure 5 is a second schematic diagram of the layout structure of the power conversion device provided in the embodiment of this application;

[0044] Figure 6 is a schematic diagram of the heat dissipation method of the first power transistor and the second power transistor provided in the embodiment of this application;

[0045] Figure 7 is a third schematic diagram of the layout structure of the power conversion device provided in the embodiment of this application;

[0046] Figure 8 is a schematic diagram of the heat dissipation method of the third power transistor provided in the embodiment of this application;

[0047] Figure 9 is a fourth schematic diagram of the layout structure of the power conversion device provided in the embodiment of this application;

[0048] Figure 10 is a fifth schematic diagram of the layout structure of the power conversion device provided in the embodiment of this application;

[0049] Figure 11 is a sixth schematic diagram of the layout structure of the power conversion device provided in the embodiment of this application;

[0050] Figure 12 is a seventh schematic diagram of the layout structure of the power conversion device provided in the embodiment of this application;

[0051] Figure 13 is a schematic diagram of the layout structure of the power conversion device provided in the embodiment of this application (eighth one).

[0052] Figure 14 is a schematic diagram of the structure of the housing and insulating component provided in the embodiment of this application;

[0053] Figure 15 is a schematic diagram of the structure of the housing, insulating component and screw connector provided in the embodiment of this application.

[0054] Reference numerals: 01-Power supply equipment; 100-Power conversion device; 200-Inverter; 300-Battery; 400-Control system; 500-Rack; 10-First circuit board; 11-First zone; 12-Second zone; 13-Air passage zone; 14-Welding nut; 20-Fan; 30-Input terminal; 40-AC / DC power conversion circuit; 41-Power inductor; 42-Electron tube; 43-First power tube; 50-DC / DC power conversion circuit; 51-Second power tube; 52-Transformer; 521-Pin; 53-Third power tube; 54-Inductor; 55-Capacitor; 60-Output terminal; 71-Second circuit board; 72-Third circuit board; 81-Second heat sink; 82-Third heat sink; 91-First capacitor; 92-Auxiliary source circuit; 93-Input filter circuit; 94-Separator plate; 95-Output filter circuit; 961-Housing shell; 9611-Protrusion; 9612-Recess; 962-Protrusion; 963-Screw connector. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] The terms "first," "second," and similar terms used in this article do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "one" or similar terms do not indicate a quantity limitation, but rather indicate the existence of at least one.

[0057] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0058] In the embodiments of this application, "part A is located between part B and part C" means that at least a part of part A is located between part B and part C. For example, a part of part A may be located between part B and part C, or the entire structure of part A may be located between part B and part C.

[0059] Figure 1 illustrates an exemplary power supply device 01 including power conversion devices 100. For example, the power supply device 01 is a cabinet-type uninterruptible power supply (UPS), wherein the power supply device 01 includes a cabinet 500 and multiple power conversion devices 100, etc., with the multiple power conversion devices 100 connected in parallel. Alternatively, the power supply device 01 can also be a charging pile, with multiple parallel power conversion devices 100 located inside the charging pile's cabinet, and the charging gun electrically connected to the multiple power conversion devices 100 via cables.

[0060] In some examples, the power supply equipment 01 includes, in addition to the cabinet 500 and multiple power conversion devices 100, an inverter 200, a battery 300, and a control system 400. The power conversion devices 100, inverter 200, battery 300, and control system 400 are housed within the cabinet 500.

[0061] The cabinet 500 has a accommodating cavity that can house components such as the power conversion device 100, inverter 200, battery 300, and control system 400. The cabinet 500 is also equipped with auxiliary facilities such as a heat dissipation system and wiring terminals to ensure the normal operation and safety of the power supply equipment 01. It should be understood that the positions of the components such as the power conversion device 100, inverter 200, battery 300, and control system 400 in Figure 1 are merely examples, intended to show that the cabinet 500 can house these components, and are not a limitation on the specific layout of the components of the power supply equipment 01. Other layout forms can be used in other embodiments.

[0062] Inverter 200 is electrically connected to power conversion device 100 and is used to convert the direct current output by power conversion device 100 into alternating current for use by AC electrical equipment. For example, inverter 200 internally includes power semiconductor devices such as insulated gate bipolar transistors (IGBTs), filter circuits, and protection circuits.

[0063] Battery 300 serves as an energy storage element for power supply device 01, providing backup power to power supply device 01 during power outages.

[0064] In some examples, the DC power output from the power conversion device 100 can supply DC power to electrical equipment.

[0065] In some examples, the DC power output from the power conversion device 100 can be used as the input to the inverter 200, which converts the DC power into AC power to supply AC-powered equipment. In the event of a mains power outage or instability, the inverter 200 can automatically switch to battery 300 power supply mode, allowing the DC power supplied by the battery 300 to be converted back to AC power by the inverter 200 and continue to supply AC-powered equipment.

[0066] In some examples, the power conversion device 100 can also charge the battery 300. When the mains power is normal, for example, a portion of the DC power output by the power conversion device 100 can be used to power DC electrical equipment, another portion of the DC power output by the power conversion device 100 can be used to power the inverter 200, and yet another portion of the DC power output by the power conversion device 100 can charge the battery 300 through the charging circuit.

[0067] The control system 400 can be used to control the operating status of the power supply equipment 01, for example, by monitoring parameters such as voltage, current, and frequency of the power supply equipment 01. For example, the control system 400 includes components such as a microprocessor, sensors, and actuators, and is used to implement automated control and fault diagnosis functions for the power supply equipment 01.

[0068] Figure 1 is merely a schematic depiction of the components of the power supply device 01 and does not constitute a specific limitation on the location, structure, or quantity of each component. In other embodiments of this application, the power supply device 01 may include more or fewer components than shown in Figure 1, or combine some components, or split some components, or adopt different component layouts.

[0069] Furthermore, the above is merely one application scenario of the power conversion device 100 provided in this application, and this application does not limit the application scenarios of the power conversion device 100. For example, the power conversion device 100 can convert DC power to AC power; as another example, the power conversion device 100 can convert AC power to DC power; as yet another example, the power conversion device 100 can boost or buck the input DC power. The power conversion device 100 of this application can be an inverter, a rectifier, an on-board charger (OBC), a power module (e.g., a DC-DC module, an AC-DC module) in a charging pile, etc.

[0070] The power conversion device 100, due to its numerous power devices and other heat-generating components, and its need for higher power density and integration, places high demands on heat dissipation. However, current power conversion devices 100 primarily rely on the sidewalls of their housing 961 for heat dissipation, and the effectiveness of this method still has significant room for improvement. Therefore, this application provides a novel power conversion device 100 that optimizes the layout of its components to form a central airflow channel. This central airflow channel effectively dissipates heat from the power devices located on both sides, thereby improving the overall heat dissipation performance of the power conversion device 100.

[0071] The power conversion device 100 provided in this application will be described in detail below.

[0072] Figure 2 is a schematic diagram of the electrical connection relationship of the power conversion device 100 provided in an embodiment of this application, and Figure 3 is one of the schematic diagrams of the layout structure of the power conversion device 100 provided in an embodiment of this application. Referring to Figures 2 and 3, the power conversion device 100 provided in this application includes a first circuit board 10, a fan 20, and an input terminal 30, an AC / DC power conversion circuit 40, a DC / DC power conversion circuit 50, and an output terminal 60 disposed on the first circuit board 10.

[0073] Input terminal 30 is electrically connected to the input terminal of AC / DC power conversion circuit 40, the output terminal of AC / DC power conversion circuit 40 is electrically connected to the input terminal of DC / DC power conversion circuit 50, and the output terminal of DC / DC power conversion circuit 50 is electrically connected to output terminal 60. It should be understood that the arrows shown in Figure 2 only represent electrical connections between related modules or components and are not restrictions on specific circuit connection methods.

[0074] Input terminal 30 is used to transmit alternating current (AC) to AC / DC power conversion circuit 40, which converts the AC input at input terminal 30 into direct current (DC). DC / DC power conversion circuit 50 is used to convert the DC output from AC / DC power conversion circuit 40, for example, by boosting or bucking the voltage. Output terminal 60 is used to output the electrical energy from DC / DC power conversion circuit 50 to supply other devices.

[0075] The power conversion device 100 provided in this application can convert the input electrical energy into power through the cooperation of the input terminal 30, the AC / DC power conversion circuit 40, the DC / DC power conversion circuit 50 and the output terminal 60, thereby providing the required electrical energy to the device 01 to be powered.

[0076] This application does not impose any restrictions on the specific circuit topology of the AC / DC power conversion circuit 40 and the DC / DC power conversion circuit 50; the circuit design can be carried out according to actual needs.

[0077] In addition to the input terminal 30, AC / DC power conversion circuit 40, DC / DC power conversion circuit 50 and output terminal 60, the power conversion device 100 provided in this application may also include other circuits or other modules, such as filter circuits, soft start circuits, etc.

[0078] Referring to Figure 3, in some examples, the first circuit board 10 has opposing first and second edges, the fan 20 is located at the first edge of the first circuit board 10, and the input terminal 30 and the output terminal 60 are both located at the second edge of the first circuit board 10.

[0079] That is, the fan 20 and the input terminal 30 are distributed on opposite sides of the first circuit board 10, and the fan 20 and the output terminal 60 are also distributed on opposite sides of the first circuit board 10. The input terminal 30 and the output terminal 60 are located on the same side of the first circuit board 10. This layout allows the power path of the power conversion device 100 to enter from the second edge of the first circuit board 10, then flow towards the first edge, and then flow back from the first edge to the second edge, with the general flow direction of the power path resembling a U-shape. The U-shaped layout facilitates the distribution of the various components of the power conversion device 100 on both sides of the first circuit board 10, and facilitates the formation of the airflow zone 13 on the first circuit board 10.

[0080] Figure 4 is a schematic diagram of the structure of the first circuit board 10 provided in the embodiment of this application. Referring to Figures 3 and 4, the first circuit board 10 has the above-mentioned air passage area 13, and a first area 11 and a second area 12 located on opposite sides of the air passage area 13. The air passage area 13 extends from the side of the circuit board where the fan 20 is provided to the side of the circuit board where the output terminal 60 is provided. The arrangement direction of the first area 11 and the second area 12 is parallel to the arrangement direction of the input terminal 30 and the output terminal 60.

[0081] The first circuit board 10 separates the first zone 11 and the second zone 12 through the air passage 13, or in other words, the air passage 13 is located between the first zone 11 and the second zone 12.

[0082] The airflow zone 13 extends from the side of the circuit board where the fan 20 is located to the side of the circuit board where the output terminal 60 is located. That is, the extension direction of the airflow zone 13 (or the airflow direction of the airflow zone 13) is the same as the arrangement direction of the fan 20 and the output terminal 60. For example, in the orientation shown in Figure 3, the arrangement direction of the fan 20 and the output terminal 60 is horizontal, then the extension direction of the airflow zone 13 is also horizontal.

[0083] The extension direction of the air passage 13 is the same as the arrangement direction of the fan 20 and the output terminal 60. Here, "same" means that their general directions are the same. For example, the extension direction of the air passage 13 is approximately horizontal, and the arrangement direction of the fan 20 and the output terminal 60 is also approximately horizontal.

[0084] In some examples, a portion of the AC / DC power conversion circuit 40 is located in the first zone 11, and another portion is located in the second zone 12. That is, the AC / DC power conversion circuit 40 is divided into two parts, one in the first zone 11 and the other in the second zone 12. Since there is an airflow zone 13 between the first zone 11 and the second zone 12, both the portion of the AC / DC power conversion circuit 40 located in the first zone 11 and the portion located in the second zone 12 can achieve good heat dissipation through the airflow zone 13, thus improving the heat dissipation effect of the AC / DC power conversion circuit 40.

[0085] For example, the DC / DC power conversion circuit 50 is located in the second zone 12. The DC / DC power conversion circuit 50 located in the second zone 12 achieves effective heat dissipation through the airflow zone 13.

[0086] Referring to Figure 3, the airflow zone 13 serves as a heat dissipation duct, including the gap between the portion of the AC / DC power conversion circuit 40 located in the first zone 11 and the portion of the AC / DC power conversion circuit 40 located in the second zone 12 (hereinafter referred to as the first gap), and the gap between the portion of the AC / DC power conversion circuit 40 located in the first zone 11 and the DC / DC power conversion circuit 50 (hereinafter referred to as the second gap). Thus, the first gap enables zoned heat dissipation for the portions of the AC / DC power conversion circuit 40 located in the first zone 11 and the portions of the AC / DC power conversion circuit 40 located in the second zone 12, and also enables zoned heat dissipation for the portions of the AC / DC power conversion circuit 40 located in the first zone 11 and the DC / DC power conversion circuit 50.

[0087] This application sets up an air passage 13 located between the first zone 11 and the second zone 12. When the air from the fan 20 enters the air passage 13, the air passage 13 can form an intermediate air duct. Combined with the heat dissipation at the side wall of the housing 961, the power devices in the first zone 11 and the second zone 12 distributed on opposite sides of the air passage 13 can achieve better heat dissipation.

[0088] For example, the portions of the AC / DC power conversion circuit 40 located in the first zone 11 and the portions of the AC / DC power conversion circuit 40 located in the second zone 12 can be effectively cooled through the first gap in the airflow zone 13. Similarly, the portions of the AC / DC power conversion circuit 40 located in the first zone 11 and the DC / DC power conversion circuit 50 can be effectively cooled through the second gap in the airflow zone 13. Through the layout described above in this application, the power conversion device 100 optimizes the arrangement of its components, thereby improving its heat dissipation performance.

[0089] Figure 5 is a second schematic diagram of the layout structure of the power conversion device 100 provided in an embodiment of this application. In one embodiment of this application, referring to Figures 3 and 5, the power inductor 41 (also called a power factor correction inductor or PFC inductor) of the AC / DC power conversion circuit 40 is located in the first region 11, and the electron tube 42 connected to the current input terminal of the power inductor 41 is located in the first region 11. The power tube connected to the current output terminal of the power inductor 41 is located in the second region 12.

[0090] The AC / DC power conversion circuit 40 includes at least a power inductor 41, a vacuum tube 42 connected to the current input terminal of the power inductor 41, and a power transistor connected to the current output terminal of the power inductor 41. For ease of description and understanding, the vacuum tube 42 connected to the current input terminal of the power inductor 41 will be referred to as vacuum tube 42 in the following text; the power transistor connected to the current output terminal of the power inductor 41 will be referred to as the first power transistor 43 in the following text. That is, the power inductor 41 of the AC / DC power conversion circuit 40 is located in the first region 11, the vacuum tube 42 of the AC / DC power conversion circuit 40 is located in the first region 11, and the first power transistor 43 of the AC / DC power conversion circuit 40 is located in the second region 12.

[0091] In this embodiment, the power inductor 41 is located on the side of the input terminal 30 facing the first edge, and the electron tube 42 is located on the side of the power inductor 41 facing the first edge. By placing the power inductor 41 on the side of the input terminal 30 facing the first edge and the electron tube 42 on the side of the power inductor 41 facing the first edge, the power inductor 41 and the electron tube 42 are closer to the fan 20 relative to the input terminal 30, thus improving heat dissipation. The electron tube 42 is also closer to the fan 20 relative to the power inductor 41, which is more conducive to heat dissipation for the electron tube 42.

[0092] The gap between the portion of the AC / DC power conversion circuit 40 located in the first region 11 and the portion of the AC / DC power conversion circuit 40 located in the second region 12 includes the gap between the electron tube 42 and the first power tube 43. That is, a portion of the air passage 13 is located between the electron tube 42 and the first power tube 43, and both the electron tube 42 and the first power tube 43 can dissipate heat through the air passage 13.

[0093] The gap between the portion of the AC / DC power conversion circuit 40 located in the first region 11 and the DC / DC power conversion circuit 50 includes the gap between the power inductor 41 and the DC / DC power conversion circuit 50. That is, a portion of the airflow zone 13 is located between the power inductor 41 and the DC / DC power conversion circuit 50, and heat dissipation between the power inductor 41 and the DC / DC power conversion circuit 50 is achieved through the airflow zone 13.

[0094] The AC / DC power conversion circuit 40 may include one power inductor 41 or multiple power inductors 41 (i.e., two or more power inductors 41). When there are two or more power inductors 41, the multiple power inductors 41 can be set separately (i.e., each power inductor 41 is a separate component, and different power inductors 41 are set independently of each other); or, in order to reduce the size, the multiple power inductors 41 can also be integrated (i.e., the multiple power inductors 41 can be integrated together as a single component).

[0095] In one embodiment of this application, a first heat sink is connected to one side of the electron tube 42. The first heat sink can be used to dissipate heat from the electron tube 42. The first heat sink is fixed to the side of the electron tube 42 that needs to dissipate heat, and the first heat sink and the electron tube 42 are electrically insulated from each other by an insulating structure. This application does not limit the specific form of the insulating structure. For example, the insulating structure can be an insulating layer or an insulating component (such as a ceramic substrate or a metal substrate).

[0096] The assembly method of the vacuum tube 42 and the first circuit board 10 can be determined according to actual needs. For example, the vacuum tube 42 can be inserted into the first circuit board 10, or the vacuum tube 42 can be mounted on the first circuit board 10.

[0097] In one embodiment of this application, the first power transistor 43 of the AC / DC power conversion circuit 40 and the power transistor connected to the primary side of the transformer 52 of the DC / DC power conversion circuit 50 are both located on the side of the transformer 52 facing the first edge.

[0098] For ease of understanding and explanation, the power transistor connected to the primary side of the transformer 52 of the DC / DC power conversion circuit 50 will be referred to as the second power transistor 51 in the following text. That is, the first power transistor 43 of the AC / DC power conversion circuit 40 and the second power transistor 51 of the DC / DC power conversion circuit 50 are both located on the side of the transformer 52 of the DC / DC power conversion circuit 50 facing the first edge.

[0099] In other words, the first power transistor 43 of the AC / DC power conversion circuit 40 and the second power transistor 51 of the DC / DC power conversion circuit 50 are closer to the fan 20 than the transformer 52 of the DC / DC power conversion circuit 50. This makes it easier for both the first power transistor 43 and the second power transistor 51 to be cooled by the fan 20.

[0100] For example, both the first power transistor 43 of the AC / DC power conversion circuit 40 and the second power transistor 51 of the DC / DC power conversion circuit 50 have gaps between them and the transformer 52. Thus, the gaps between the first power transistor 43 and the transformer 52, and the gaps between the second power transistor 51 and the transformer 52, can form heat dissipation channels, allowing the air blown by the fan 20 to pass through these channels, thereby improving the heat dissipation efficiency of the first power transistor 43, the second power transistor 51, and the transformer 52.

[0101] For example, the DC / DC power conversion circuit 50 also includes an inductor 54 and a capacitor 55. The inductor 54 and capacitor 55 of the DC / DC power conversion circuit 50 are located on the side of the first power transistor 43 and the second power transistor 51 away from the fan 20, and the inductor 54 and capacitor 55 of the DC / DC power conversion circuit 50 are located on the side of the output terminal 60 facing the fan 20.

[0102] That is, the transformer 52, inductor 54 and capacitor 55 of the DC / DC power conversion circuit 50 are all located between the first power transistor 43 and the output terminal 60, and the transformer 52, inductor 54 and capacitor 55 of the DC / DC power conversion circuit 50 are all located between the second power transistor 51 and the output terminal 60.

[0103] The inductor 54 and the transformer 52 of the DC / DC power conversion circuit 50 can be set separately (i.e., the inductor 54 and the transformer 52 of the DC / DC power conversion circuit 50 are each an independent component); or, in order to reduce the size, the inductor 54 and the transformer 52 of the DC / DC power conversion circuit 50 can be integrated (i.e., the inductor 54 and the transformer 52 of the DC / DC power conversion circuit 50 can be integrated together as a single component).

[0104] Figure 6 is a schematic diagram of the heat dissipation method of the first power transistor 43 and the second power transistor 51 provided in an embodiment of this application. Referring to Figures 5 and 6, in one embodiment of this application, the power conversion device 100 further includes a second circuit board 71, which is fixedly connected to the first circuit board 10, and the surface of the second circuit board 71 is perpendicular to the surface of the first circuit board 10. For example, the second circuit board 71 is inserted into the first circuit board 10.

[0105] The first power transistor 43 of the AC / DC power conversion circuit 40 and the second power transistor 51 of the DC / DC power conversion circuit 50 are both fixedly connected to the second circuit board 71. That is, the first power transistor 43 and the second power transistor 51 are mounted on the second circuit board 71, and the second circuit board 71 is then mounted on the first circuit board 10. By setting the second circuit board 71, this application allows the first power transistor 43 and the second power transistor 51 to be mounted on the second circuit board 71 first, and then the second circuit board 71, which is fixedly connected to the first power transistor 43 and the second power transistor 51, to be fixedly fixed to the first circuit board 10 as a whole. Compared to directly mounting the first power transistor 43 and the second power transistor 51 to the first circuit board 10, the first power transistor 43 and the second power transistor 51 are less affected by other components connected to the first circuit board 10 during assembly, which facilitates assembly.

[0106] Furthermore, fixing the second circuit board 71 to the first circuit board 10, with the surface of the second circuit board 71 perpendicular to the surface of the first circuit board 10, also saves planar space on the first circuit board 10. At the same time, compared to directly mounting the first power transistor 43 and the second power transistor 51 onto the first circuit board 10, this layout reduces the heat dissipation burden on the first circuit board 10.

[0107] For example, at least one of the main body portion of the first power transistor 43 and the main body portion of the second power transistor 51 is located on the side of the second circuit board 71 facing the first edge. In this way, the main body portion of the first power transistor 43 and / or the main body portion of the second power transistor 51 is closer to the fan 20 relative to the second circuit board 71, which is beneficial for heat dissipation of the first power transistor 43 and the second power transistor 51.

[0108] Referring to Figure 6, in one embodiment of this application, in order to improve the heat dissipation effect of the first power transistor 43 and the second power transistor 51, the first power transistor 43 and the second power transistor 51 are respectively connected to a second heat sink 81 on the side away from the second circuit board 71.

[0109] The first power transistor 43 and the second power transistor 51 have an insulating structure between themselves and the second heat sink 81, such as an insulating coating, a ceramic substrate, or a metal substrate.

[0110] Referring to Figures 3 and 5, in one embodiment of this application, the fan 20 is located in the second zone 12. The fan 20 is located on the side of the first power transistor 43 and the second power transistor 51 that are respectively away from the transformer 52. The fan 20 is used to blow air toward the first power transistor 43 and the second power transistor 51.

[0111] This application places the fan 20 in the second zone 12, and positions the fan 20 on the side away from the transformer 52, where the first power transistor 43 and the second power transistor 51 are respectively located. In this way, the first power transistor 43 and the second power transistor 51 are positioned closer to the fan 20 relative to components such as the transformer 52. The fan 20 blows air toward the first power transistor 43 and the second power transistor 51, and the heat dissipation effect of the first power transistor 43 and the second power transistor 51 can be significantly improved.

[0112] Figure 7 is a third schematic diagram of the layout structure of the power conversion device 100 provided in this application embodiment. In another possible implementation, referring to Figures 3 and 7, a portion of the fan 20 is located in the first zone 11, a portion in the second zone 12, and a portion in the airflow zone 13. That is, the fan 20 is located in three zones. For example, the air outlet of the fan 20 faces the airflow zone 13, so that the components on both sides of the airflow zone 13 can obtain better heat dissipation.

[0113] In one embodiment of this application, the power transistor connected to the secondary side of the transformer 52 is located in the second region 12, and there is a gap between the power transistor connected to the secondary side of the transformer 52 and the transformer 52.

[0114] For ease of understanding and explanation, the power transistor connected to the secondary side of transformer 52 will be referred to as the third power transistor 53 in the following text. That is, the third power transistor 53 of the DC / DC power conversion circuit 50 is located in the second zone 12, and there is a gap between the third power transistor 53 and transformer 52.

[0115] The third power transistor 53 is located on the side of the transformer 52 facing the air passage 13; or, the third power transistor 53 is located on the side of the transformer 52 away from the air passage 13.

[0116] That is, in some embodiments, referring to Figures 3 and 5, the third power transistor 53 of the DC / DC power conversion circuit 50 is located on the side of the transformer 52 facing the wind passage 13.

[0117] Figure 11 is a sixth schematic diagram of the layout structure of the power conversion device 100 provided in the embodiment of this application. Referring to Figures 3 and 11, in some embodiments, the third power transistor 53 of the DC / DC power conversion circuit 50 is located on the side of the transformer 52 facing away from the wind passage 13.

[0118] This application effectively utilizes the space of the second region 12 of the first circuit board 10 by arranging the third power transistor 53 in the second region 12 of the first circuit board 10. The gap between the third power transistor 53 and the transformer 52 allows the third power transistor 53 to dissipate heat through the transformer 52 on the side facing the air passage 13 or on the side away from the air passage 13.

[0119] Figure 8 is a schematic diagram of the heat dissipation method of the third power transistor 53 provided in an embodiment of this application. Referring to Figure 8, in one embodiment of this application, the power conversion device 100 further includes a third circuit board 72, which is fixedly connected to the first circuit board 10, and the surface of the third circuit board 72 is perpendicular to the surface of the first circuit board 10. The third power transistor 53 is fixedly connected to the third circuit board 72.

[0120] By providing a third circuit board 72, this application allows the third power transistor 53 to be first mounted onto the third circuit board 72, and then the third circuit board 72, with the third power transistor 53 fixedly connected, to be fixed onto the first circuit board 10. Compared to directly mounting the third power transistor 53 onto the first circuit board 10, the mounting of the third power transistor 53 is less affected by other components connected to the first circuit board 10, facilitating assembly. Especially when there are multiple third power transistors 53, mounting multiple third power transistors 53 onto the third circuit board 72 and then fixing them onto the first circuit board 10 reduces the assembly difficulty of the power conversion device 100.

[0121] Furthermore, by fixing the third circuit board 72 to the first circuit board 10, with the surface of the third circuit board 72 perpendicular to the surface of the first circuit board 10, the planar space of the first circuit board 10 can be saved. At the same time, compared with directly mounting the third power transistor 53 to the first circuit board 10, the heat dissipation burden of the first circuit board 10 can be reduced, and the reliability of the power conversion device 100 can be improved.

[0122] Referring to Figure 8, in one embodiment of this application, a third heat sink 82 is connected to the side of the third power transistor 53 facing away from the third circuit board 72. An insulating structure is also provided between the third power transistor 53 and the third heat sink 82, which can be an insulating coating, a ceramic substrate, or a metal substrate, etc.

[0123] Figure 9 is a fourth schematic diagram of the layout structure of the power conversion device 100 provided in an embodiment of this application, and Figure 13 is an eighth schematic diagram of the layout structure of the power conversion device 100 provided in an embodiment of this application. Referring to Figures 9 or 13, in order to shorten the wiring distance and improve signal transmission efficiency, in one embodiment of this application, the output terminal of the transformer 52 of the DC / DC power conversion circuit 50 has a pin 521, with the end of the pin 52 facing away from the transformer 52 and towards the third power transistor 53. By having the end of the transformer 52 facing away from the transformer 52 and towards the third power transistor 53, the transformer 52 is connected to the third power transistor 53 through its pin 521. Compared to connecting the transformer 52 to the third power transistor 53 through the first circuit board 10, this layout method can shorten the wiring distance and reduce the wiring complexity of the first circuit board 10.

[0124] In one embodiment of this application, referring to Figures 3 and 9, the power conversion device 100 further includes a first capacitor 91, which is electrically connected to the output terminal of the AC / DC power conversion circuit 40 and the input terminal of the DC / DC power conversion circuit 50. The first capacitor 91, electrically connected between the output terminal of the AC / DC power conversion circuit 40 and the input terminal of the DC / DC power conversion circuit 50, serves to stabilize the DC bus voltage and provide filtering.

[0125] The first capacitor 91 is located in the first region 11, and the first capacitor 91 is located on the side of the power inductor 41 facing the first edge. By placing the first capacitor 91 in the first region 11 and on the side of the power inductor 41 facing the first edge, the layout of the first capacitor 91 does not obstruct the heat dissipation of components such as the power inductor 41, and the space of the first circuit board 10 can be effectively utilized.

[0126] There is a gap between the power inductor 41 and the first capacitor 91, so that the air from the fan 20 can enter the gap between the power inductor 41 and the first capacitor 91, thereby dissipating heat and cooling both the power inductor 41 and the first capacitor 91. There is also a gap between the vacuum tube 42 and the first capacitor 91, so that the air from the fan 20 can enter the gap between the vacuum tube 42 and the first capacitor 91, thereby dissipating heat and cooling both the vacuum tube 42 and the first capacitor 91 respectively.

[0127] This application increases the number of heat dissipation ducts by providing gaps between the power inductor 41 and the first capacitor 91, as well as between the electron tube 42 and the first capacitor 91, thereby optimizing the heat dissipation effect of the power conversion device 100.

[0128] In one embodiment of this application, the power conversion device 100 further includes an auxiliary power source circuit 92, which supplies power to the fan 20. The auxiliary power source circuit 92 is electrically connected to the first capacitor 91. Thus, the auxiliary power source circuit 92 can draw power from the first capacitor 91 to supply power to the fan 20. It should be understood that supplying power to the fan 20 is only one function of the auxiliary power source circuit 92; it can also supply power to the low-voltage control circuit of the power conversion device 100, etc.

[0129] The auxiliary power source circuit 92 is located in the second zone 12, and the auxiliary power source circuit 92 is located between the power inductor 41 of the AC / DC power conversion circuit 40 and the transformer 52 of the DC / DC power conversion circuit 50. In this way, the auxiliary power source circuit 92 is closer to the airflow zone 13 than the transformer 52. This layout can make the heat dissipation effect of the auxiliary power source circuit 92 better.

[0130] In this embodiment, there is a gap between the auxiliary power source circuit 92 and the transformer 52 of the DC / DC power conversion circuit 50. In this way, the gap between the auxiliary power source circuit 92 and the transformer 52 of the DC / DC power conversion circuit 50 can serve as a heat dissipation duct, allowing the airflow from the fan 20 to enter the gap and cool down both the auxiliary power source circuit 92 and the transformer 52.

[0131] In one embodiment of this application, the power conversion device 100 further includes an input filter circuit 93. The input terminal of the input filter circuit 93 is electrically connected to the input terminal 30, and the output terminal of the input filter circuit 93 is electrically connected to the AC / DC power conversion circuit 40. The input filter circuit 93 can suppress ripple and harmonic current flowing into the power supply, improve power quality, and filter out high-frequency noise and interference, thereby improving the signal purity of the power conversion device 100.

[0132] For example, referring to Figures 3 and 9, the input filter circuit 93 is located in the first region 11, and the input filter circuit 93 is located between the input terminal 30 and the power inductor 41 of the AC / DC power conversion circuit 40, with a gap between the input filter circuit 93 and the power inductor 41.

[0133] Since the input terminal of the input filter circuit 93 needs to be electrically connected to the input terminal 30, and the output terminal of the input filter circuit 93 needs to be electrically connected to the AC / DC power conversion circuit 40, this application places the input filter circuit 93 in the first region 11 and between the input terminal 30 and the power inductor 41. This facilitates the electrical connection between the input filter circuit 93 and the input terminal 30 and the AC / DC power conversion circuit 40, shortens the wiring distance of the power conversion device 100, and reduces the complexity of the wiring connection.

[0134] Figure 10 is a fifth schematic diagram of the layout structure of the power conversion device 100 provided in the embodiment of this application, and Figure 12 is a seventh schematic diagram of the layout structure of the power conversion device 100 provided in the embodiment of this application. Please refer to Figures 3 and 10, or Figures 3 and 12, in one embodiment of this application, a partition plate 94 is fixed on the first circuit board 10. The partition plate 94 is located in the air passage area 13, and the input filter circuit 93 and the third power tube 53 are distributed on different sides of the partition plate 94.

[0135] That is, a partition plate 94 located in the air passage zone 13 is fixed on the first circuit board 10, and the input filter circuit 93 and the third power transistor 53 are respectively disposed on opposite sides of the partition plate 94. By placing the partition plate 94 in the air passage zone 13, this application can effectively utilize the space of the air passage zone 13, and can also divide the air passing through the air passage zone 13 into two parts through the partition plate 94. One part flows through the partition plate 94 towards the third power transistor 53, and the other part flows through the partition plate 94 towards the input filter circuit 93, thereby realizing independent heat dissipation for the input filter circuit 93 and the third power transistor 53.

[0136] The partition plate 94 can separate the input filter circuit 93 and the third power transistor 53, and can block the propagation path of electromagnetic interference signals between the input filter circuit 93 and the third power transistor 53 to a certain extent, thereby reducing the electromagnetic interference (EMI) phenomenon inside the power conversion device 100 and improving the electromagnetic compatibility of the power conversion device 100.

[0137] To achieve better electromagnetic shielding, the separator 94 can be made of metallic materials, such as aluminum, copper, or silver; or, the separator 94 can be made of non-metallic materials with electromagnetic shielding effects, such as conductive polymer materials or magnetic materials.

[0138] Referring to Figures 3 and 9, in one embodiment of this application, the power conversion device 100 further includes an output filter circuit 95. The input terminal of the output filter circuit 95 is electrically connected to the output terminal of the DC / DC power conversion circuit 50, and the output terminal of the output filter circuit 95 is electrically connected to the output terminal 60.

[0139] High-frequency noise and ripple voltage may be generated at the output of the power conversion device 100. If these high-frequency noise and ripple voltages are not filtered, they will have adverse effects on the load circuit, such as affecting the stability of the circuit and increasing the noise of the circuit. Therefore, this application can eliminate or improve these high-frequency noise and ripple voltages by setting an output filter circuit 95, thereby filtering out these unwanted components to a certain extent and supplying only a flat or sinusoidal voltage to the load, thereby improving the purity of the output signal and improving the quality of the power supply voltage output from the power conversion device 100 to the load.

[0140] The output filter circuit 95 is located in the second zone 12, and is positioned between the output terminal 60 and the transformer 52 of the DC / DC power conversion circuit 50. Since the input terminal of the output filter circuit 95 needs to be electrically connected to the DC / DC power conversion circuit 50, and the output terminal of the output filter circuit 95 needs to be electrically connected to the output terminal 60, this application positions the output filter circuit 95 in the second zone 12, between the output terminal 60 and the transformer 52 of the DC / DC power conversion circuit 50. This facilitates the electrical connection between the output filter circuit 95 and the output terminal 60 and the DC / DC power conversion circuit 50, shortens the wiring distance of the power conversion device 100, and reduces the complexity of the wiring connections.

[0141] In some examples, there is a gap between the output filter circuit 95 and the transformer 52. This gap serves as a heat dissipation duct, allowing the airflow from the fan 20 to pass through and carry away the heat from the output filter circuit 95 and the transformer 52, thereby improving the heat dissipation efficiency of the output filter circuit 95 and the transformer 52.

[0142] In one embodiment of this application, referring to Figures 3 and 5, the input terminal 30 includes a plurality of first pads spaced apart along a first direction, and the output terminal 60 includes a plurality of second pads spaced apart along the first direction; the surfaces of the first pads and the surfaces of the second pads are provided with a gold layer. The first direction is parallel to the arrangement direction of the first region 11 and the second region 12.

[0143] The input terminal 30 of this application is configured to include a plurality of first pads spaced apart along a first direction, and the output terminal 60 is configured to include a plurality of second pads spaced apart along a first direction, with a gold layer formed on the surfaces of the first pads and the surfaces of the second pads. This structure is commonly known as a gold finger, which enables stable electrical connection between the power conversion device 100 and other components. By using gold fingers as input terminals 30 and output terminals 60, this application allows for electrical connection with other components via plug-in connections. This electrical connection method eliminates the need for complex wiring, facilitates maintenance and replacement, and improves the maintainability and flexibility of the device.

[0144] Figure 14 is a structural schematic diagram of the housing 961 and protrusion 962 provided in an embodiment of this application. Figure 15 is a structural schematic diagram of the housing 961, protrusion 962, and screw connector 963 provided in an embodiment of this application. Referring to Figures 5, 14, and 15, in one embodiment of this application, the power conversion device 100 further includes a housing 961 with a receiving cavity. The first circuit board 10, fan 20, input terminal 30, AC / DC power conversion circuit 40, DC / DC power conversion circuit 50, and output terminal 60 are all disposed within the receiving cavity. By providing the housing 961, the power conversion device 100 can physically protect components such as the first circuit board 10, fan 20, input terminal 30, AC / DC power conversion circuit 40, DC / DC power conversion circuit 50, and output terminal 60, preventing contamination from moisture or other substances. Furthermore, it also makes the appearance of the power conversion device 100 neater and prevents exposed components from causing safety risks.

[0145] In some examples, the outer wall of the housing 961 has a groove, through which the power conversion device 100 can be slidably connected to the guide rail on the cabinet 500 of the power supply equipment 01, so that the power conversion device 100 can be quickly assembled into the cabinet 500 of the power supply equipment 01.

[0146] For example, the inner wall of the housing 961 is provided with a protrusion 962, the first circuit board 10 is provided on the side of the protrusion 962 away from the housing 961, and the power conversion device 100 also includes a screw connector 963, one end of the screw connector 963 passes through the housing 961 and the protrusion 962 in sequence and is connected to the first circuit board 10, and the protrusion 962 is made of insulating material.

[0147] In this application, a protrusion 962 made of insulating material is fixed to the inner wall of the housing 961. The first circuit board 10 is located on the side of the protrusion 962 away from the housing 961. In this way, the protrusion 962 is disposed between the housing 961 and the first circuit board 10. The protrusion 962 can support the first circuit board 10 and can also achieve an insulated connection with the circuit of the first circuit board 10. In addition, the protrusion 962 can also separate the first circuit board 10 and the housing 961 by a certain distance, increase the heat dissipation area of ​​the first circuit board 10, and improve the heat dissipation efficiency of the first circuit board 10.

[0148] For example, the specific structural shape of the protrusion 962 is not limited in this application, as long as the protrusion 962 can separate the first circuit board 10 and the housing 961 by a certain distance and can achieve insulation between the first circuit board 10 and the housing 961. For example, the protrusion 962 is a block structure with a through hole, or the protrusion 962 is a plate structure with a through hole, or the protrusion 962 is a strip structure with a through hole.

[0149] For example, the inner wall of the housing 961 has a ridge 9611 corresponding to the groove, and a protrusion 962 is provided on the inner wall of the housing 961 with the ridge 9611.

[0150] In addition, as an example, this application provides a recess 9612 at the protrusion 9611, and a portion of the protrusion 962 is fixed in the recess 9612. This allows the space at the protrusion 9611 to be utilized, reducing the occupancy of the protrusion 962 on other spaces inside the housing 961 and improving the area utilization rate inside the housing 961.

[0151] For example, a welding nut 14 is fixed on the first circuit board 10. The welding nut 14 is fixed at a position corresponding to the screw connector 963. In this way, when the screw connector 963 passes through the housing 961 and the protrusion 962 to connect with the first circuit board 10, it is only necessary to screw the screw connector 963 into the welding nut 14.

[0152] For example, as shown in Figure 14, the fan 20 is fixed to the side wall of the housing 961.

[0153] In some examples, housing 961 includes a first housing and a second housing, which are fastened together for easier assembly. For example, the first housing includes a fastening groove, and the second housing includes a fastening element adapted to the fastening groove, the fastening element of the second housing fastening into the fastening groove of the first housing; or vice versa (i.e., the second housing includes a fastening groove, the first housing includes a fastening element adapted to the fastening groove, the fastening element of the first housing fastening into the fastening groove of the second housing).

[0154] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power conversion device, characterized by, It includes a first circuit board, a fan, and input terminals, AC / DC power conversion circuit, DC / DC power conversion circuit and output terminals disposed on the first circuit board; The input terminal is electrically connected to the input terminal of the AC / DC power conversion circuit, the output terminal of the AC / DC power conversion circuit is electrically connected to the input terminal of the DC / DC power conversion circuit, and the output terminal of the DC / DC power conversion circuit is electrically connected to the output terminal. The first circuit board has a first edge and a second edge, the fan is located on the first edge, and the input terminal and the output terminal are both located on the second edge; the circuit board has an air passage area, and a first area and a second area located on opposite sides of the air passage area, the air passage area extends from the side of the circuit board where the fan is located to the side of the circuit board where the output terminal is located, and the arrangement direction of the first area and the second area is parallel to the arrangement direction of the input terminal and the output terminal; A portion of the AC / DC power conversion circuit is located in the first region, and another portion of the AC / DC power conversion circuit and the DC / DC power conversion circuit are located in the second region. The air passage includes the gap between the portion of the AC / DC power conversion circuit located in the first zone and the portion of the AC / DC power conversion circuit located in the second zone, as well as the gap between the portion of the AC / DC power conversion circuit located in the first zone and the DC / DC power conversion circuit.

2. The power conversion device of claim 1, wherein, The power inductor of the AC / DC power conversion circuit is located in the first region, and the electron tube connected to the current input terminal of the power inductor is located in the first region; the power tube connected to the current output terminal of the power inductor is located in the second region. The power inductor is located on the side of the input terminal facing the first edge, and the electron tube connected to the current input terminal of the power inductor is located on the side of the power inductor facing the first edge. The gap between the portion of the AC / DC power conversion circuit located in the first region and the portion of the AC / DC power conversion circuit located in the second region includes: the gap between the electron tube connected to the current input terminal of the power inductor and the power tube connected to the current output terminal of the power inductor; The gap between the portion of the AC / DC power conversion circuit located in the first region and the DC / DC power conversion circuit includes the gap between the power inductor and the DC / DC power conversion circuit.

3. The power conversion device of claim 2, wherein, The power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer of the DC / DC power conversion circuit are both located on the side of the transformer facing the first edge. The power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer in the DC / DC power conversion circuit both have gaps between them and the transformer.

4. The power conversion device of claim 3, wherein, The power conversion device further includes a second circuit board, which is fixedly connected to the first circuit board, and the surface of the second circuit board is perpendicular to the surface of the first circuit board. The power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer are both fixedly connected to the second circuit board. Furthermore, at least one of the main body portion of the power transistor connected to the current output terminal of the power inductor and the main body portion of the power transistor connected to the primary side of the transformer is located on the side of the second circuit board facing the first edge.

5. The power conversion device according to claim 3 or 4, characterized in that, The fan is located in the second zone. The fan is located on the side opposite to the transformer of the power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer. The fan is used to blow air toward the power transistor connected to the current output terminal of the power inductor and the power transistor connected to the primary side of the transformer.

6. The power conversion device according to any one of claims 3 to 5, characterized by The power transistor connected to the secondary side of the transformer is located in the second region, and there is a gap between the power transistor connected to the secondary side of the transformer and the transformer; The power transistor connected to the secondary side of the transformer is located on the side of the transformer facing the air passage area; or, the power transistor connected to the secondary side of the transformer is located on the side of the transformer away from the air passage area.

7. The power conversion device of claim 6, wherein, The power conversion device further includes a third circuit board, which is fixedly connected to the first circuit board, and the surface of the third circuit board is perpendicular to the surface of the first circuit board. The power transistor connected to the secondary side of the transformer is fixedly connected to the third circuit board.

8. The power conversion device according to claim 6 or 7, characterized in that, The output terminal of the transformer has a pin, one end of which faces away from the transformer and is directed toward a power transistor connected to the secondary side of the transformer. The pin is connected to the power transistor connected to the secondary side of the transformer.

9. The power conversion device of any of claims 2-8, wherein, The power conversion device further includes a first capacitor, which is electrically connected to the output terminal of the AC / DC power conversion circuit and the input terminal of the DC / DC power conversion circuit. The first capacitor is located in the first region, and the first capacitor is located on the side of the power inductor facing the first edge; There is a gap between the power inductor and the first capacitor, and there is a gap between the electron tube connected to the current input terminal of the power inductor and the first capacitor.

10. The power conversion device of claim 9, wherein, The power conversion device further includes an auxiliary power source circuit, which is used to power the fan and is electrically connected to the first capacitor. The auxiliary source circuit is located in the second region, and the auxiliary source circuit is located between the power inductor of the AC / DC power conversion circuit and the transformer of the DC / DC power conversion circuit; There is a gap between the transformer of the auxiliary source circuit and the DC / DC power conversion circuit.

11. The power conversion device of any of claims 1-10, wherein, The power conversion device further includes an input filter circuit, the input terminal of which is electrically connected to the input terminal, and the output terminal of which is electrically connected to the AC / DC power conversion circuit. The input filter circuit is located in the first region, and the input filter circuit is located between the input terminal and the power inductor of the AC / DC power conversion circuit, with a gap between the input filter circuit and the power inductor.

12. The power conversion device of claim 11, wherein, A partition plate is fixed on the first circuit board. The partition plate is located in the air passage area. The input filter circuit and the power transistors connected to the secondary side of the transformer of the DC / DC power conversion circuit are distributed on different sides of the partition plate.

13. The power conversion device of any of claims 1-12, wherein, The power conversion device further includes an output filter circuit, the input terminal of which is electrically connected to the output terminal of the DC / DC power conversion circuit, and the output terminal of which is electrically connected to the output terminal. The output filter circuit is located in the second area, and the output filter circuit is disposed between the output terminal and the transformer of the DC / DC power conversion circuit, with a gap between the output filter circuit and the transformer.

14. The power conversion device of any one of claims 1-13, wherein, The power conversion device further includes a housing with a cavity, wherein the first circuit board, the fan, the input terminal, the AC / DC power conversion circuit, the DC / DC power conversion circuit, and the output terminal are all disposed within the cavity; The inner wall of the housing is provided with a protrusion, and the first circuit board is located on the side of the protrusion away from the housing. The power conversion device also includes a screw connector, one end of which passes through the housing and the protrusion in sequence and is connected to the first circuit board. The protrusion is made of insulating material.

15. A power supply device, comprising: include: Server rack; A plurality of power conversion devices as described in any one of claims 1-14, wherein the plurality of power conversion devices are located within the cabinet and the plurality of power conversion devices are connected in parallel.

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