Power conversion device and power supply equipment

Abstract

The utility model provides a power conversion device and power supply equipment, and relates to the technical field of power supplies. 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 which are arranged on the first circuit board. The fan is located at a first edge of the first circuit board, and the input terminal and the output terminal are located at a second edge opposite to the first edge; the circuit board is provided with an air passing area, a first area and a second area, the first area and the second area are located on the two opposite sides of the air passing area, the air passing area extends from the side, provided with the fan, of the circuit board to the side, provided with the output terminals, of the circuit board, and the arrangement direction of the first area and the arrangement direction of the second area are parallel to the arrangement direction of the input terminals and the output terminals; one part of the AC / DC power conversion circuit is located in the first area, and the other part of the AC / DC power conversion circuit and the DC / DC power conversion circuit are located in the second area. The layout of the power conversion device can be optimized, and the heat dissipation effect can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to a power conversion device and a power supply device. BACKGROUND

[0002] The power conversion device is a modular power supply component, which integrates various components, such as a heat dissipation component, a plurality of functional components (such as inductors, transformers, MOS tubes, etc.), an input module, a filter module, an output module, and a plurality of printed board components, to provide stable and reliable direct current voltage. The power conversion device converts input power (which can be alternating current or direct current) into stable direct current power, and has various protection functions such as short circuit protection, overload protection, and over-temperature protection.

[0003] The power conversion device has a plurality of power components and other heat-generating components, and needs to develop towards high power density and high integration, so the heat dissipation requirement of the power conversion device is gradually increasing. The power conversion device needs to meet good heat dissipation requirements to ensure that the related components can work reliably and stably. However, the current power conversion device mainly realizes heat dissipation of the power components through the side wall of the shell of the power conversion device, and the heat dissipation effect still has a lot of room for improvement. CONTENT OF THE INVENTION

[0004] The present application provides a power conversion device and a power supply device. The purpose is to optimize the layout of the power conversion device, thereby improving the heat dissipation effect of the power conversion device.

[0005] To achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

[0006] On the one hand, the present application provides a power conversion device, which 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 arranged on the first circuit board. The input terminal is electrically connected with the input end of the AC / DC power conversion circuit, the output end of the AC / DC power conversion circuit is electrically connected with the input end of the DC / DC power conversion circuit, and the output end of the DC / DC power conversion circuit is electrically connected with the output terminal.

[0007] The first circuit board has opposite first and second edges, the fan is located at the first edge, and the input terminal and the output terminal are both located at the second edge; the circuit board has a wind passing area, and a first area and a second area are located at opposite sides of the wind passing area respectively, the wind passing area extends from a side of the circuit board where the fan is located to a 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. Part of the AC / DC power conversion circuit is located in the first area, and the other part of the AC / DC power conversion circuit and the DC / DC power conversion circuit are located in the second area. The wind passing area includes a gap between the part of the AC / DC power conversion circuit located in the first area and the part of the AC / DC power conversion circuit located in the second area, and a gap between the part of the AC / DC power conversion circuit located in the first area and the DC / DC power conversion circuit.

[0008] The power conversion device provided by the application can realize power conversion of the input electric energy through the cooperation of the input terminal, the AC / DC power conversion circuit, the DC / DC power conversion circuit and the output terminal, thereby providing the required electric energy for the to-be-powered equipment. By arranging the fan at the first edge of the first circuit board, arranging the input terminal and the output terminal at the second edge, and extending the wind passing area 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 wind passing area includes a gap (referred to as a first gap) between the part of the AC / DC power conversion circuit located in the first area and the part of the AC / DC power conversion circuit located in the second area, and a gap (referred to as a second gap) between the part of the AC / DC power conversion circuit located in the first area and the DC / DC power conversion circuit. In this way, when the wind of the fan enters the wind passing area, the wind passing area can form an intermediate air duct, and in combination with the heat dissipation at the side wall of the shell, the power devices distributed in the first area and the power devices distributed in the second area at opposite sides of the wind passing area can all achieve better heat dissipation effect. For example, the part of the AC / DC power conversion circuit located in the first area and the part of the AC / DC power conversion circuit located in the second area can be effectively cooled through the first gap of the wind passing area; the part of the AC / DC power conversion circuit located in the first area and the DC / DC power conversion circuit can be effectively cooled through the second gap of the wind passing area. Through the above layout form of the application, the layout of each component can be optimized, thereby improving the heat dissipation effect of the power conversion device.

[0009] In an embodiment of the present application, the power inductor of the AC / DC power conversion circuit is located in the first region, and the electronic tube connected to the current input end of the power inductor is located in the first region; the power tube connected to the current output end 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 electronic tube connected to the current input end of the power inductor is located on the side of the power inductor facing the first edge. The gap between the part of the AC / DC power conversion circuit located in the first region and the part of the AC / DC power conversion circuit located in the second region includes: the gap between the electronic tube connected to the current input end of the power inductor and the power tube connected to the current output end of the power inductor; the gap between the part 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.

[0010] Through the above layout, the electronic tube connected to the current input end of the power inductor and the power tube connected to the current output end of the power inductor are closer to the fan relative to the input terminal; by making the air passage include the gap between the electronic tube connected to the current input end of the power inductor and the power tube connected to the current output end of the power inductor, the electronic tube and the power tube of the AC / DC power conversion circuit can be effectively cooled through the combination of the gap and the fan. By making the air passage include the gap between the power inductor and the DC / DC power conversion circuit, the DC / DC power conversion circuit and the power inductor can be effectively cooled through the combination of the fan.

[0011] In an embodiment of the present application, the power tube connected to the current output end of the power inductor and the power tube 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 tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer of the DC / DC power conversion circuit both have a gap with the transformer.

[0012] The power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer of the DC / DC power conversion circuit are arranged in the above layout, which can make the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer of the DC / DC power conversion circuit closer to the fan relative to the transformer; on the other hand, the number of cooling air ducts can be increased through the gap between the power tube connected to the current output end of the power inductor and the transformer, and the gap between the power tube connected to the primary side of the transformer and the transformer. By making the corresponding power tubes closer to the fan in layout, and by arranging multiple cooling air ducts, the heat dissipation efficiency of the power conversion device is improved.

[0013] In an embodiment of the present application, the power conversion device further comprises a second circuit board, the second circuit board 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 tube connected to the current output end of the power inductor and the power tube 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 of the power tube connected to the current output end of the power inductor and the main body of the power tube connected to the primary side of the transformer is located on the side of the second circuit board facing the first edge.

[0014] According to the layout of the second circuit board, the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer are both fixed to the second circuit board first, and then the second circuit board is fixed to the first circuit board. Compared with directly fixing the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer to the first circuit board, the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer are less affected by other components on the first circuit board during assembly, and are more convenient to assemble. In addition, the surface of the second circuit board is perpendicular to the surface of the first circuit board, which can also reduce the heat dissipation burden of the first circuit board and improve the heat dissipation efficiency. Furthermore, at least one of the main body of the power tube connected to the current output end of the power inductor and the main body of the power tube connected to the primary side of the transformer is located on the side of the second circuit board facing the first edge, so that the main body of the power tube connected to the current output end of the power inductor and / or the main body of the power tube connected to the primary side of the transformer are closer to the fan relative to the second circuit board, which is conducive to the heat dissipation of the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer.

[0015] In an embodiment of the present application, the fan is located in the second area, and the fan is located on the side of the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer respectively away from the transformer, and the fan is used to blow air towards the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer.

[0016] According to the layout of the second circuit board, the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer are both fixed to the second circuit board first, and then the second circuit board is fixed to the first circuit board. Compared with directly fixing the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer to the first circuit board, the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer are less affected by other components on the first circuit board during assembly, and are more convenient to assemble. In addition, the surface of the second circuit board is perpendicular to the surface of the first circuit board, which can also reduce the heat dissipation burden of the first circuit board and improve the heat dissipation efficiency. Furthermore, at least one of the main body of the power tube connected to the current output end of the power inductor and the main body of the power tube connected to the primary side of the transformer is located on the side of the second circuit board facing the first edge, so that the main body of the power tube connected to the current output end of the power inductor and / or the main body of the power tube connected to the primary side of the transformer are closer to the fan relative to the second circuit board, which is conducive to the heat dissipation of the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer.

[0017] In an embodiment of the present application, the power tube connected to the secondary side of the transformer is located in the second area, and there is a gap between the power tube connected to the secondary side of the transformer and the transformer. The power tube connected to the secondary side of the transformer is located on the side of the transformer facing the air passing area, or the power tube connected to the secondary side of the transformer is located on the side of the transformer away from the air passing area.

[0018] The present application can effectively utilize the space of the second area of the first circuit board through the above layout. The gap between the power tube connected to the secondary side of the transformer and the transformer can enable the power tube connected to the secondary side of the transformer to dissipate heat through the side of the transformer facing the air passing area or the side of the transformer away from the air passing area.

[0019] In an embodiment of the present application, the power conversion device further comprises a third circuit board fixedly connected to the first circuit board, and the board surface of the third circuit board is perpendicular to the board surface of the first circuit board; the power tube connected to the secondary side of the transformer is fixedly connected to the third circuit board.

[0020] The present application can first connect the third power tube to the third circuit board, and then fix the third circuit board with the third power tube to the first circuit board by setting the third circuit board. Compared with directly connecting the third power tube to the first circuit board, on the one hand, the third power tube is not easily affected by other components connected to the first circuit board during assembly, and the assembly is facilitated; on the other hand, the setting of the third circuit board can reduce the heat dissipation burden of the first circuit board and improve the reliability of the power conversion device.

[0021] In an embodiment of the present application, the output end of the transformer has a pin, and the end of the pin away from the transformer faces the power tube connected to the secondary side of the transformer, and the pin is connected to the power tube connected to the secondary side of the transformer.

[0022] The present application sets the end of the pin away from the transformer to face the power tube connected to the secondary side of the transformer, and the output end of the transformer is connected to the power tube connected to the secondary side of the transformer through the pin. Compared with connecting the transformer to the power tube connected to the secondary side of the transformer through the first circuit board, this layout can shorten the wiring distance and reduce the wiring complexity of the first circuit board.

[0023] In an embodiment of the present application, the power conversion device further comprises a first capacitor electrically connected to the output end of the AC / DC power conversion circuit and the input end of the DC / DC power conversion circuit; the first capacitor is located in the first area, 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 electronic tube connected to the current input end of the power inductor and the first capacitor.

[0024] The first capacitor is arranged in the first region, and the first capacitor is located on the side of the power inductor facing the first edge. In this way, the layout position of the first capacitor does not block the heat dissipation of the power inductor and the like, and the space of the first circuit board can be effectively utilized. In addition, there is a gap between the power inductor and the first capacitor, and there is a gap between the electronic tube connected to the current input end of the power inductor and the first capacitor. In this way, the two gaps can serve as heat dissipation air ducts for air to pass through, and the heat dissipation effect can be improved.

[0025] In an embodiment of the present application, the power conversion device further comprises an auxiliary source circuit, the auxiliary source circuit is used 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 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 auxiliary source circuit and the transformer of the DC / DC power conversion circuit.

[0026] The auxiliary source circuit can supply power to the fan. By arranging the auxiliary source circuit in the second region and locating the auxiliary source circuit between the power inductor of the AC / DC power conversion circuit and the transformer of the DC / DC power conversion circuit, the auxiliary source circuit is closer to the air passing region relative to the transformer. This layout can make the heat dissipation effect of the auxiliary source circuit better. By providing a gap between the auxiliary source circuit and the transformer of the DC / DC power conversion circuit, the fan air can enter the gap, thereby improving the heat dissipation efficiency of the auxiliary source circuit and the transformer.

[0027] In an embodiment of the present application, the power conversion device further comprises an input filter circuit, an input end of the input filter circuit is electrically connected to the input terminal, and an output end 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 the input filter circuit 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.

[0028] Since the input end of the input filter circuit needs to be electrically connected to the input terminal, and the output end of the input filter circuit needs to be electrically connected to the AC / DC power conversion circuit, the input filter circuit is arranged in the first region and between the input terminal and the power inductor. This can facilitate 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 line connection.

[0029] In an embodiment of the present application, a partition plate is fixed on the first circuit board, the partition plate is located in the air passing region, and the input filter circuit and the power tube connected to the secondary side of the transformer of the DC / DC power conversion circuit are distributed on different sides of the partition plate.

[0030] The application can effectively utilize the space of the air passing area by arranging the partition plate in the air passing area, and can divide the air passing through the air passing area into two parts by the partition plate, one part flows from the partition plate to the side of the third power tube, and the other part flows from the partition plate to the side of the input filter circuit, so that the independent heat dissipation of the input filter circuit and the third power tube can be realized. In addition, the arrangement of the partition plate can separate the input filter circuit and the third power tube, so that the propagation path of the electromagnetic interference signal between the input filter circuit and the third power tube can be blocked to a certain extent, thereby reducing the electromagnetic interference phenomenon in the power conversion device and improving the electromagnetic compatibility of the power conversion device.

[0031] In an embodiment of the application, the power conversion device further comprises an output filter circuit, an input end of the output filter circuit is electrically connected with the output end of the DC / DC power conversion circuit, and an output end of the output filter circuit is electrically connected with the output terminal. The output filter circuit is located in the second area, and the output filter circuit is arranged between the output terminal and the transformer of the DC / DC power conversion circuit, and there is a gap between the output filter circuit and the transformer.

[0032] Since the input end of the output filter circuit needs to be electrically connected with the DC / DC power conversion circuit, and the output end of the output filter circuit needs to be electrically connected with the output terminal, the application arranges the output filter circuit in the second area and between the output terminal and the transformer of the DC / DC power conversion circuit, so that the electrical connection between the output filter circuit and the output terminal and the DC / DC power conversion circuit can be facilitated, the wiring distance of the power conversion device is shortened, and the complexity of the line connection is reduced.

[0033] In an embodiment of the application, the power conversion device further comprises a housing having a receiving cavity, 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 arranged in the receiving cavity. The inner wall of the housing is provided with a protrusion, the first circuit board is arranged on the side of the protrusion away from the housing, the power conversion device further comprises a threaded member, one end of the threaded member passes through the housing and the protrusion in sequence and is connected with the first circuit board, and the protrusion is made of insulating material.

[0034] The application arranges the protrusion made of insulating material on the inner wall of the housing, and the first circuit board is located on the side of the protrusion away from the housing, so that the protrusion is arranged between the inner wall of the housing and the first circuit board, and can support the first circuit board and realize insulation with the lines of the first circuit board. In addition, the protrusion can also separate the first circuit board and 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.

[0035] In another aspect, the application provides a power supply device, which comprises a cabinet and a plurality of power conversion devices in any of the above-mentioned implementable manners, the plurality of power conversion devices being located in the cabinet and being connected in parallel.

[0036] The power supply device of the application can at least optimize the layout of the power conversion devices and improve the heat dissipation effect of the power conversion devices due to the adoption of the power conversion devices in any of the above-mentioned implementable manners. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A structural schematic diagram of the power supply device provided by the embodiment of the application;

[0038] Figure 2 An electrical connection relationship schematic diagram of the power conversion device provided by the embodiment of the application;

[0039] Figure 3 A layout structural schematic diagram of the power conversion device provided by the embodiment of the application;

[0040] Figure 4 A structural schematic diagram of the first circuit board provided by the embodiment of the application;

[0041] Figure 5 A layout structural schematic diagram of the power conversion device provided by the embodiment of the application;

[0042] Figure 6 A heat dissipation manner schematic diagram of the first power tube and the second power tube provided by the embodiment of the application;

[0043] Figure 7 A layout structural schematic diagram of the power conversion device provided by the embodiment of the application;

[0044] Figure 8 A heat dissipation manner schematic diagram of the third power tube provided by the embodiment of the application;

[0045] Figure 9 A layout structural schematic diagram of the power conversion device provided by the embodiment of the application;

[0046] Figure 10 A layout structural schematic diagram of the power conversion device provided by the embodiment of the application;

[0047] Figure 11 A layout structural schematic diagram of the power conversion device provided by the embodiment of the application;

[0048] Figure 12 A layout structural schematic diagram of the power conversion device provided by the embodiment of the application;

[0049] Figure 13 Fig. 8 is a schematic view of a layout structure of a power conversion device according to an embodiment of the present application;

[0050] Figure 14 Fig. 9 is a schematic view of a structure of a housing and an insulating member according to an embodiment of the present application;

[0051] Figure 15 Fig. 10 is a schematic view of a structure of a housing, an insulating member, and a screwing member according to an embodiment of the present application.

[0052] Reference Signs:

[0053] 01 - power supply device; 100 - power conversion device; 200 - inverter; 300 - battery; 400 - control system; 500 - cabinet;

[0054] 10 - first circuit board; 11 - first area; 12 - second area; 13 - air passing area; 14 - soldering nut; 20 - fan; 30 - input terminal;

[0055] 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;

[0056] 60 - output terminal; 71 - second circuit board; 72 - third circuit board; 81 - second heat sink; 82 - third heat sink;

[0057] 91 - first capacitor; 92 - auxiliary source circuit; 93 - input filter circuit; 94 - partition plate; 95 - output filter circuit; 961 - housing; 9611 - protrusion; 9612 - recess; 962 - protrusion; 963 - screwing member. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0059] The "first", "second", and similar words mentioned herein do not represent any order, quantity, or importance, but are only used to distinguish different components. Similarly, "one" or "a" and similar words do not represent a quantity limitation, but represent the existence of at least one.

[0060] In the embodiments of the present application, the word "exemplary" or "for example" is used to mean an example, an illustration, or another instance or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application is not necessarily to be construed as preferred or advantageous over other embodiments or designs. In fact, a variety of

[0061] In the embodiments of the present application, "component A is located between component B and component C" means that at least part of component A is located between component B and component C, for example, part of component A can be located between component B and component C, or the entire structure of component A can be located between component B and component C.

[0062] Figure 1 An exemplary power supply device 01 is shown, which includes a power conversion device 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 a plurality of power conversion devices 100, etc., and the plurality of power conversion devices 100 are connected in parallel. For another example, the power supply device 01 can also be a charging pile, and the plurality of parallel power conversion devices 100 are located in the cabinet of the charging pile, and the charging gun is electrically connected to the plurality of power conversion devices 100 through a cable.

[0063] In some examples, in addition to including the cabinet 500 and the plurality of power conversion devices 100, the power supply device 01 also includes an inverter 200, a battery 300, and a control system 400, etc. Among them, the power conversion device 100, the inverter 200, the battery 300, and the control system 400 are arranged in the cabinet 500.

[0064] The cabinet 500 is provided with a receiving cavity, which can be used to accommodate components such as the power conversion device 100, the inverter 200, the battery 300, and the control system 400. The cabinet 500 is also equipped with a cooling system and a wiring terminal and other auxiliary facilities to ensure the normal operation and safety of the power supply device 01. It should be understood that, Figure 1 The positions of the components such as the power conversion device 100, the inverter 200, the battery 300, and the control system 400 are only examples, which are intended to represent that the cabinet 500 can be provided with the components such as the power conversion device 100, the inverter 200, the battery 300, and the control system 400, and are not a limitation on the layout positions of the specific components of the power supply device 01. In other embodiments, other layout forms can also be used.

[0065] The inverter 200 is electrically connected to the power conversion device 100, and is configured to convert the direct current output by the power conversion device 100 into alternating current for use by the alternating current electrical equipment. For example, the inverter 200 internally includes power semiconductor devices such as insulated gate bipolar transistors (IGBTs), filter circuits, protection circuits, and the like.

[0066] The battery 300 serves as an energy storage element of the power supply device 01, and provides backup power for the power supply device 01 in the event of a power outage.

[0067] In some examples, the direct current output by the power conversion device 100 can be used by the direct current electrical equipment.

[0068] In some examples, the direct current output by the power conversion device 100 can be used as input to the inverter 200, which converts the direct current into alternating current for use by the alternating current electrical equipment. In the event of a power outage or instability, the inverter 200 can automatically switch to a battery 300 power supply mode, so that the direct current provided by the battery 300 is converted into alternating current by the inverter 200 and continues to be used by the alternating current electrical equipment.

[0069] 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 direct current output by the power conversion device 100 can be used by the direct current electrical equipment, another portion of the direct current output by the power conversion device 100 can be used by the inverter 200, and yet another portion of the direct current output by the power conversion device 100 can be used to charge the battery 300 through a charging circuit.

[0070] The control system 400 can be used to control the operating state of the power supply device 01, for example, to monitor parameters such as voltage, current, and frequency of the power supply device 01. For example, the control system 400 includes components such as microprocessors, sensors, actuators, and the like, and is configured to implement automatic control and fault diagnosis functions of the power supply device 01.

[0071] Figure 1 The components of the power supply device 01 are described only schematically, and are not limited in terms of the specific arrangement, configuration, and number of the components. In other embodiments of the present application, the power supply device 01 can include more or fewer components than those shown, or can combine certain components, or split certain components, or use different component arrangements. Figure 1

[0072] ​In addition, the above is only one application scenario of the power conversion device 100 provided in the present application, and the application scenario of the power conversion device 100 is not limited in the present application. For example, the power conversion device 100 can convert direct current into alternating current; for another example, the power conversion device 100 can convert alternating current into direct current; for another example, the power conversion device 100 can boost or buck the input direct current. The power conversion device 100 in the present application can be an inverter, a rectifier, an on-board charger (OBC), a power module (for example, a DC-DC module, an AC-DC module) in a charging pile, and the like.

[0073] The power conversion device 100 has more power devices and other heat-generating elements, and needs to develop towards high power density and high integration, so the heat dissipation requirement of the power conversion device 100 is high. However, the current power conversion device 100 mainly relies on the side wall of the shell 961 of the power conversion device 100 to realize the heat dissipation of the power device, and the heat dissipation effect still has a lot of room for improvement. Based on this, the present application provides a new power conversion device 100, which can form an intermediate air duct by optimizing the layout of each component in the power conversion device 100, and can effectively dissipate heat for the power devices located on both sides of the intermediate air duct, thereby improving the heat dissipation effect of the entire power conversion device 100.

[0074] The power conversion device 100 provided in the present application will be described in detail below.

[0075] Figure 2 The power conversion device 100 provided in the present application will be described in detail below. Figure 3 The power conversion device 100 provided in the present application will be described in detail below. Figure 2 And Figure 3 The power conversion device 100 provided in the present 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 arranged on the first circuit board 10.

[0076] The input terminal 30 is electrically connected with the input end of the AC / DC power conversion circuit 40, the output end of the AC / DC power conversion circuit 40 is electrically connected with the input end of the DC / DC power conversion circuit 50, and the output end of the DC / DC power conversion circuit 50 is electrically connected with the output terminal 60. It should be understood that Figure 2 The arrow shown in the figure only represents that the related modules or components have an electrical connection relationship, and is not a limitation on the specific circuit connection form.

[0077] The input terminal 30 is configured to transmit AC power to the AC / DC power conversion circuit 40, and the AC / DC power conversion circuit 40 is configured to convert the AC power input by the input terminal 30 into DC power. The DC / DC power conversion circuit 50 is configured to perform power conversion, such as voltage boosting or voltage reducing, on the DC power output by the AC / DC power conversion circuit 40. The output terminal 60 is configured to output the power output by the DC / DC power conversion circuit 50 to supply other devices.

[0078] The power conversion device 100 provided by the present application can perform power conversion on the input 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 power for the device to be powered 01.

[0079] The present application does not limit the specific circuit topology of the AC / DC power conversion circuit 40 and the DC / DC power conversion circuit 50, and the circuit can be designed according to actual needs.

[0080] In addition, the power conversion device 100 provided by the present application can further include other circuits or other modules in addition to the input terminal 30, the AC / DC power conversion circuit 40, the DC / DC power conversion circuit 50, and the output terminal 60, such as a filter circuit, a soft start circuit, and the like.

[0081] Please refer to Figure 3 In some examples, the first circuit board 10 has opposite first and second edges, and 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.

[0082] That is, the fan 20 and the input terminal 30 are distributed on opposite edges of the first circuit board 10, and the fan 20 and the output terminal 60 are also distributed on opposite edges of the first circuit board 10, and the input terminal 30 and the output terminal 60 are located on the same edge of the first circuit board 10. This layout form can make the power path of the power conversion device 100 enter from the second edge of the first circuit board 10, then flow in the direction towards the first edge, and then flow from the first edge back to the second edge, and the general flow direction of the power path is similar to a U shape. The U-shaped layout form can facilitate the distribution of the components of the power conversion device 100 on both edges of the first circuit board 10, and facilitate the formation of the air passing area 13 on the first circuit board 10.

[0083] Figure 4 For the structure of the first circuit board 10 provided by the embodiments of the present application, please refer to Figure 3 and Figure 4For example, the first circuit board 10 has the above-mentioned over-wind area 13, and the first area 11 and the second area 12 respectively located at opposite sides of the over-wind area 13. The over-wind area 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. 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.

[0084] The first circuit board 10 separates the first area 11 and the second area 12 by the over-wind area 13, or in other words, the over-wind area 13 is located between the first area 11 and the second area 12.

[0085] The over-wind area 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 over-wind area 13 (or also can be called the wind direction of the over-wind area 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 the horizontal direction, and the extension direction of the over-wind area 13 is also the horizontal direction.

[0086] The extension direction of the over-wind area 13 is the same as the arrangement direction of the fan 20 and the output terminal 60. Here, the same means that the general trend of the two is the same. For example, the extension direction of the over-wind area 13 is approximately the horizontal direction, and the arrangement direction of the fan 20 and the output terminal 60 is also approximately the horizontal direction.

[0087] In some examples, part of the AC / DC power conversion circuit 40 is located in the first area 11, and another part of the AC / DC power conversion circuit 40 is located in the second area 12. That is, the AC / DC power conversion circuit 40 is divided into two parts, one part is located in the first area 11, and the other part is located in the second area 12. In this way, since the first area 11 and the second area 12 have the over-wind area 13 therebetween, the part of the AC / DC power conversion circuit 40 distributed in the first area 11 and the part of the AC / DC power conversion circuit 40 distributed in the second area 12 can be well cooled through the over-wind area 13, and the heat dissipation effect of the AC / DC power conversion circuit 40 can be improved.

[0088] For example, the DC / DC power conversion circuit 50 is located in the second area 12. The DC / DC power conversion circuit 50 located in the second area 12 can be effectively cooled through the over-wind area 13.

[0089] Please refer to Figure 3As shown, the over-wind area 13 serves as a heat dissipation air duct, including a gap (referred to as a first gap) between the part of the AC / DC power conversion circuit 40 located in the first area 11 and the part of the AC / DC power conversion circuit 40 located in the second area 12, and a gap (referred to as a second gap) between the part of the AC / DC power conversion circuit 40 located in the first area 11 and the DC / DC power conversion circuit 50. In this way, the part of the AC / DC power conversion circuit 40 located in the first area 11 and the part of the AC / DC power conversion circuit 40 located in the second area 12 are partitioned and cooled through the first gap, and the part of the AC / DC power conversion circuit 40 located in the first area 11 and the DC / DC power conversion circuit 50 are partitioned and cooled.

[0090] The present application provides an over-wind area 13 located between the first area 11 and the second area 12. When the wind of the fan 20 enters the over-wind area 13, the over-wind area 13 can form an intermediate air duct, and in combination with the heat dissipation of the side wall of the shell 961, the power devices distributed in the first area 11 on the opposite sides of the over-wind area 13 and the power devices distributed in the second area 12 can all achieve better heat dissipation effect.

[0091] For example, the part of the AC / DC power conversion circuit 40 located in the first area 11 and the part of the AC / DC power conversion circuit 40 located in the second area 12 can be effectively cooled through the first gap of the over-wind area 13. The part of the AC / DC power conversion circuit 40 located in the first area 11 and the DC / DC power conversion circuit 50 can be effectively cooled through the second gap of the over-wind area 13. The power conversion device 100 can optimize the layout of each component through the above layout form, thereby improving the heat dissipation effect of the power conversion device 100.

[0092] Figure 5 The layout structure diagram of the power conversion device 100 provided by the embodiment of the present application is provided. In an embodiment of the present application, please refer to Figure 3 and Figure 5 The power inductor 41 (also referred to as a power factor correction inductor, or a PFC inductor) of the AC / DC power conversion circuit 40 is located in the first area 11, and the electronic tube 42 connected to the current input end of the power inductor 41 is located in the first area 11. The power tube connected to the current output end of the power inductor 41 is located in the second area 12.

[0093] The AC / DC power conversion circuit 40 at least includes a power inductor 41, a tube 42 connected to the current input end of the power inductor 41, and a power tube connected to the current output end of the power inductor 41. For the convenience of description and understanding, the tube 42 connected to the current input end of the power inductor 41 will be referred to as the tube 42 hereinafter; the power tube connected to the current output end of the power inductor 41 will be referred to as the first power tube 43 hereinafter. That is, the power inductor 41 of the AC / DC power conversion circuit 40 is located in the first area 11, the tube 42 of the AC / DC power conversion circuit 40 is located in the first area 11, and the first power tube 43 of the AC / DC power conversion circuit 40 is located in the second area 12.

[0094] The power inductor 41 is located on the side of the input terminal 30 facing the first edge, and the tube 42 is located on the side of the power inductor 41 facing the first edge. By arranging the power inductor 41 on the side of the input terminal 30 facing the first edge and arranging the tube 42 on the side of the power inductor 41 facing the first edge, the power inductor 41 and the tube 42 are closer to the fan 20 relative to the input terminal 30, and the heat dissipation effect can be improved; the tube 42 is closer to the fan 20 relative to the power inductor 41, which is more conducive to heat dissipation of the tube 42.

[0095] The gap between the part of the AC / DC power conversion circuit 40 located in the first area 11 and the part of the AC / DC power conversion circuit 40 located in the second area 12 includes the gap between the tube 42 and the first power tube 43. That is, a part of the air passing area 13 is located between the tube 42 and the first power tube 43, and both the tube 42 and the first power tube 43 can dissipate heat through the air passing area 13.

[0096] The gap between the part of the AC / DC power conversion circuit 40 located in the first area 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 part of the air passing area 13 is located between the power inductor 41 and the DC / DC power conversion circuit 50, and the power inductor 41 and the DC / DC power conversion circuit 50 dissipate heat through the air passing area 13.

[0097] The AC / DC power conversion circuit 40 can include one power inductor 41 or multiple power inductors 41 (i.e., two or more power inductors 41). When the power inductor 41 includes two or more, the multiple power inductors 41 can be arranged separately (i.e., each power inductor 41 is a separate component, and different power inductors 41 are arranged independently of each other); or, in order to reduce the volume, the multiple power inductors 41 can also be arranged integrally (i.e., multiple power inductors 41 can be integrated together as one part).

[0098] In an embodiment of the present application, the first heat sink is connected to one side of the electron tube 42. The first heat sink can be used to dissipate heat for 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 by an insulating structure. The specific form of the insulating structure is not limited in the present application. For example, the insulating structure can be an insulating layer or an insulating piece (such as a ceramic substrate or a metal substrate, etc.).

[0099] The connection mode of the electron tube 42 and the first circuit board 10 can be determined according to actual needs. For example, the electron tube 42 can be inserted into the first circuit board 10, or the electron tube 42 can be attached to the first circuit board 10, etc.

[0100] In an embodiment of the present application, the first power tube 43 of the AC / DC power conversion circuit 40 and the power tube connected to the primary side of the transformer 52 of the DC / DC power conversion circuit 50 are located on the side of the transformer 52 facing the first edge.

[0101] For the sake of convenience and description, the power tube 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 tube 51 hereinafter. That is, the first power tube 43 of the AC / DC power conversion circuit 40 and the second power tube 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.

[0102] That is, the first power tube 43 of the AC / DC power conversion circuit 40 and the second power tube 51 of the DC / DC power conversion circuit 50 are both closer to the fan 20 relative to the transformer 52 of the DC / DC power conversion circuit 50. In this way, the first power tube 43 and the second power tube 51 are both more convenient to dissipate heat by the fan 20.

[0103] For example, the first power tube 43 of the AC / DC power conversion circuit 40 and the second power tube 51 of the DC / DC power conversion circuit 50 both have a gap with the transformer 52. In this way, the gap between the first power tube 43 and the transformer 52, and the gap between the second power tube 51 and the transformer 52 can both form a heat dissipation air duct, so that the wind blown by the fan 20 passes through the heat dissipation air duct, thereby improving the heat dissipation efficiency of the first power tube 43, the second power tube 51 and the transformer 52.

[0104] For example, the DC / DC power conversion circuit 50 further includes an inductor 54 and a capacitor 55. The inductor 54 and the capacitor 55 of the DC / DC power conversion circuit 50 are arranged on the side of the first power tube 43 and the second power tube 51 away from the fan 20, and the inductor 54 and the capacitor 55 of the DC / DC power conversion circuit 50 are arranged on the side of the output terminal 60 facing the fan 20.

[0105] That is, the transformer 52, the inductor 54 and the capacitor 55 of the DC / DC power conversion circuit 50 are located between the first power tube 43 and the output terminal 60, and the transformer 52, the inductor 54 and the capacitor 55 of the DC / DC power conversion circuit 50 are located between the second power tube 51 and the output terminal 60.

[0106] The inductor 54 of the DC / DC power conversion circuit 50 and the transformer 52 of the DC / DC power conversion circuit 50 can be separately arranged (that is, the inductor 54 of the DC / DC power conversion circuit 50 and the transformer 52 of the DC / DC power conversion circuit 50 are respectively independent parts); or, in order to reduce the volume, the inductor 54 of the DC / DC power conversion circuit 50 and the transformer 52 of the DC / DC power conversion circuit 50 can be integrated (that is, the inductor 54 of the DC / DC power conversion circuit 50 and the transformer 52 of the DC / DC power conversion circuit 50 can be integrated together as one part).

[0107] Figure 6 The first power tube 43 and the second power tube 51 provided in the embodiment of the application are shown in the schematic diagram of the heat dissipation mode, please refer to Figure 5 and Figure 6 In an embodiment of the application, the power conversion device 100 further comprises a second circuit board 71, the second circuit board 71 is fixedly connected to the first circuit board 10, and the board surface of the second circuit board 71 is perpendicular to the board surface of the first circuit board 10. For example, the second circuit board 71 is inserted into the first circuit board 10.

[0108] The first power tube 43 of the AC / DC power conversion circuit 40 and the second power tube 51 of the DC / DC power conversion circuit 50 are fixedly connected to the second circuit board 71. That is, the first power tube 43 and the second power tube 51 are connected to the second circuit board 71, and the second circuit board 71 is connected to the first circuit board 10. By arranging the second circuit board 71, the first power tube 43 and the second power tube 51 can be connected to the second circuit board 71 first, and then the second circuit board 71 fixedly connected with the first power tube 43 and the second power tube 51 is fixed to the first circuit board 10 as a whole. Compared with directly connecting the first power tube 43 and the second power tube 51 to the first circuit board 10, the first power tube 43 and the second power tube 51 are not easily affected by other components connected to the first circuit board 10 when being connected, and can be easily assembled.

[0109] In addition, the second circuit board 71 is fixedly connected to the first circuit board 10, and the board surface of the second circuit board 71 is perpendicular to the board surface of the first circuit board 10, so that the planar space of the first circuit board 10 can be saved. Meanwhile, compared with directly connecting the first power tube 43 and the second power tube 51 to the first circuit board 10, the layout can reduce the heat dissipation burden of the first circuit board 10.

[0110] For example, at least one of the main body part of the first power tube 43 and the main body part of the second power tube 51 is located on the side of the second circuit board 71 facing the first edge. In this way, the main body part of the first power tube 43 and / or the main body part of the second power tube 51 are closer to the fan 20 relative to the second circuit board 71, which is conducive to heat dissipation of the first power tube 43 and the second power tube 51.

[0111] For example, at least one of the main body part of the first power tube 43 and the main body part of the second power tube 51 is located on the side of the second circuit board 71 facing the first edge. In this way, the main body part of the first power tube 43 and / or the main body part of the second power tube 51 are closer to the fan 20 relative to the second circuit board 71, which is conducive to heat dissipation of the first power tube 43 and the second power tube 51. Figure 6

[0112] The first power tube 43 and the second power tube 51 are respectively connected with the second heat sink 81 on the side away from the second circuit board 71.

[0113] For example, at least one of the main body part of the first power tube 43 and the main body part of the second power tube 51 is located on the side of the second circuit board 71 facing the first edge. In this way, the main body part of the first power tube 43 and / or the main body part of the second power tube 51 are closer to the fan 20 relative to the second circuit board 71, which is conducive to heat dissipation of the first power tube 43 and the second power tube 51. Figure 3 Figure 5 In an embodiment of the present application, the fan 20 is located in the second area 12, and the fan 20 is located on the side of the first power tube 43 and the second power tube 51 away from the transformer 52, and the fan 20 is used to blow air towards the first power tube 43 and the second power tube 51.

[0114] In an embodiment of the present application, the fan 20 is located in the second area 12, and the fan 20 is located on the side of the first power tube 43 and the second power tube 51 away from the transformer 52, and the fan 20 is used to blow air towards the first power tube 43 and the second power tube 51.

[0115] Figure 7 In another implementation manner, please refer to Figure 3 Figure 7 ​​​As shown, part of the fan 20 is located in the first area 11, part of the fan 20 is located in the second area 12, and part of the fan 20 is located in the air passing area 13. That is, the fan 20 is located in the three areas. For example, the air outlet of the fan 20 is opposite to the air passing area 13, so that the components on the two sides of the air passing area 13 can obtain better heat dissipation effect.

[0116] In an embodiment of the present application, the power tube connected to the secondary side of the transformer 52 is located in the second area 12, and there is a gap between the power tube connected to the secondary side of the transformer 52 and the transformer 52.

[0117] For the convenience of understanding and description, the power tube connected to the secondary side of the transformer 52 will be referred to as the third power tube 53 hereinafter. That is, the third power tube 53 of the DC / DC power conversion circuit 50 is located in the second area 12, and there is a gap between the third power tube 53 and the transformer 52.

[0118] Wherein, the third power tube 53 is located on the side of the transformer 52 facing the air passing area 13; or, the third power tube 53 is located on the side of the transformer 52 away from the air passing area 13.

[0119] That is, in some embodiments, please refer to Figure 3 and Figure 5 , the position of the third power tube 53 of the DC / DC power conversion circuit 50 is on the side of the transformer 52 facing the air passing area 13.

[0120] Figure 11 For the layout structure schematic diagram of the power conversion device 100 provided in an embodiment of the present application, please refer to Figure 3 and Figure 11 , in some embodiments, the position of the third power tube 53 of the DC / DC power conversion circuit 50 is on the side of the transformer 52 away from the air passing area 13.

[0121] The present application can effectively utilize the space of the second area 12 of the first circuit board 10 by arranging the third power tube 53 in the second area 12 of the first circuit board 10. There is a gap between the third power tube 53 and the transformer 52, which can enable the third power tube 53 to dissipate heat through the side of the transformer 52 facing the air passing area 13 or the side of the transformer 52 away from the air passing area 13.

[0122] Figure 8 For the heat dissipation mode schematic diagram of the third power tube 53 provided in an embodiment of the present application, please refer to Figure 8 In an embodiment of the present application, the power conversion device 100 further comprises a third circuit board 72, the third circuit board 72 is fixedly connected to the first circuit board 10, and the board surface of the third circuit board 72 is perpendicular to the board surface of the first circuit board 10. The third power tube 53 is fixedly connected to the third circuit board 72.

[0123] The third circuit board 72 is arranged, the third power tube 53 is firstly connected to the third circuit board 72, and then the third circuit board 72 connected with the third power tube 53 is fixed to the first circuit board 10. Compared with directly connecting the third power tube 53 to the first circuit board 10, the third power tube 53 is not easily affected by other components connected to the first circuit board 10 during connection, and the assembly is facilitated. Especially when the third power tube 53 includes a plurality of third power tubes 53, the plurality of third power tubes 53 are connected to the third circuit board 72 and then fixed to the first circuit board 10, which can reduce the assembly difficulty of the power conversion device 100.

[0124] In addition, the third circuit board 72 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, which can save the planar space of the first circuit board 10. At the same time, compared with directly connecting the third power tube 53 to the first circuit board 10, the heat dissipation burden of the first circuit board 10 is reduced, and the reliability of the power conversion device 100 is improved.

[0125] Please refer to Figure 8 In an embodiment of the present application, the third power tube 53 is connected with the third heat sink 82 on the side away from the third circuit board 72. The third power tube 53 and the third heat sink 82 are further provided with an insulating structure, which can be an insulating coating, a ceramic substrate or a metal substrate, etc.

[0126] Figure 9 The layout structure diagram four of the power conversion device 100 provided in the embodiment of the present application is shown in Figure 13 The layout structure diagram eight of the power conversion device 100 provided in the embodiment of the present application is shown in Figure 9 Or Figure 13 In order to shorten the wiring distance and improve the signal transmission efficiency, in an embodiment of the present application, the output end of the transformer 52 of the DC / DC power conversion circuit 50 is provided with a pin 521, and the end of the pin 521 away from the transformer 52 is directed to the third power tube 53. By directing the end of the pin 521 of the transformer 52 away from the transformer 52 to the third power tube 53, and connecting the transformer 52 to the third power tube 53 through the pin 521, compared with connecting the transformer 52 to the third power tube 53 through the first circuit board 10, this layout mode can shorten the wiring distance and reduce the wiring complexity of the first circuit board 10.

[0127] In an embodiment of the present application, please refer to Figure 3 and Figure 9The power conversion device 100 further comprises a first capacitor 91, which is electrically connected between the output of the AC / DC power conversion circuit 40 and the input of the DC / DC power conversion circuit 50. The first capacitor 91 is electrically connected between the output of the AC / DC power conversion circuit 40 and the input of the DC / DC power conversion circuit 50, and can stabilize the DC bus voltage and filter.

[0128] The first capacitor 91 is located in the first area 11, and the first capacitor 91 is located on the side of the power inductor 41 facing the first edge. In this application, the first capacitor 91 is arranged in the first area 11, and the first capacitor 91 is located on the side of the power inductor 41 facing the first edge. In this way, the layout position of the first capacitor 91 will not block the heat dissipation of the power inductor 41 and other components, and the space of the first circuit board 10 can be effectively utilized.

[0129] The power inductor 41 and the first capacitor 91 have a gap therebetween, so that the wind of the fan 20 can enter the gap between the power inductor 41 and the first capacitor 91, thereby cooling the power inductor 41 and the first capacitor 91. The electronic tube 42 and the first capacitor 91 also have a gap therebetween, so that the wind of the fan 20 can enter the gap between the electronic tube 42 and the first capacitor 91, thereby cooling the electronic tube 42 and the first capacitor 91, respectively.

[0130] In this application, by arranging gaps between the power inductor 41 and the first capacitor 91 and between the electronic tube 42 and the first capacitor 91, the number of heat dissipation air ducts can be increased, and the heat dissipation effect of the power conversion device 100 can be optimized.

[0131] In an embodiment of the present application, the power conversion device 100 further comprises an auxiliary source circuit 92, which is used to supply power to the fan 20, and the auxiliary source circuit 92 is electrically connected with the first capacitor 91. In this way, the auxiliary source circuit 92 can take power through the first capacitor 91, thereby supplying power to the fan 20. It should be understood that the auxiliary source circuit 92 is used to supply power to the fan 20 only as a function of the auxiliary source circuit 92, and the auxiliary source circuit 92 can also be used to supply power to the low-voltage control circuit of the power conversion device 100 and the like.

[0132] The auxiliary source circuit 92 is located in the second area 12, and the auxiliary 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 source circuit 92 is closer to the air passing area 13 relative to the transformer 52, and this layout can make the heat dissipation effect of the auxiliary source circuit 92 better.

[0133] In the embodiment, there is a gap between the auxiliary source circuit 92 and the transformer 52 of the DC / DC power conversion circuit 50. In this way, the gap between the auxiliary source circuit 92 and the transformer 52 of the DC / DC power conversion circuit 50 can serve as a heat dissipation channel, and the fan 20 can blow air into the gap to dissipate heat from the auxiliary source circuit 92 and the transformer 52, respectively.

[0134] In an embodiment of the present application, the power conversion device 100 further comprises an input filter circuit 93, an input end of the input filter circuit 93 is electrically connected to the input terminal 30, and an output end of the input filter circuit 93 is electrically connected to the AC / DC power conversion circuit 40. The input filter circuit 93 can suppress the inflow of ripple and harmonic currents into the power supply, improve the power supply quality, and filter out high-frequency noise and interference, thereby improving the signal purity of the power conversion device 100.

[0135] For example, as shown in Figure 3 and Figure 9 , the input filter circuit 93 is located in the first area 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, and there is a gap between the input filter circuit 93 and the power inductor 41.

[0136] Since the input end of the input filter circuit 93 needs to be electrically connected to the input terminal 30, and the output end of the input filter circuit 93 needs to be electrically connected to the AC / DC power conversion circuit 40, the present application sets the input filter circuit 93 in the first area 11 and between the input terminal 30 and the power inductor 41, which can facilitate the electrical connection between the input filter circuit 93 and the input terminal 30 and the AC / DC power conversion circuit 40, respectively, shorten the wiring distance of the power conversion device 100, and reduce the complexity of the line connection.

[0137] Figure 10 For the layout structure schematic diagram of the power conversion device 100 provided in an embodiment of the present application, Figure 12 For the layout structure schematic diagram of the power conversion device 100 provided in an embodiment of the present application, Figure 3 and Figure 10 , or in combination with Figure 3 and Figure 12 , in an embodiment of the present application, the first circuit board 10 is fixed with a partition plate 94, the partition plate 94 is located in the air passing area 13, and the input filter circuit 93 and the third power tube 53 are distributed on different sides of the partition plate 94.

[0138] That is, the first circuit board 10 is fixed with a partition plate 94 located in the air passing area 13, and the input filter circuit 93 and the third power tube 53 are respectively arranged on opposite sides of the partition plate 94. By arranging the partition plate 94 in the air passing area 13, the space of the air passing area 13 can be effectively utilized, and the air passing through the air passing area 13 can be divided into two parts by the partition plate 94, one part flows from one side of the partition plate 94 towards the third power tube 53, and the other part flows from the other side of the partition plate 94 towards the input filter circuit 93, so that the input filter circuit 93 and the third power tube 53 can be independently cooled.

[0139] The arrangement of the partition plate 94 can separate the input filter circuit 93 and the third power tube 53, and can block the propagation path of the electromagnetic interference signal between the input filter circuit 93 and the third power tube 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.

[0140] In order to achieve better electromagnetic shielding effect, the partition plate 94 can be made of metal materials such as aluminum, copper or silver, etc.; or the partition plate 94 can also be made of non-metal materials with electromagnetic wave shielding effect, such as conductive polymer materials or magnetic materials, etc.

[0141] Please refer to Figure 3 and Figure 9 In an embodiment of the present application, the power conversion device 100 further comprises an output filter circuit 95, the input end of the output filter circuit 95 is electrically connected with the output end of the DC / DC power conversion circuit 50, and the output end of the output filter circuit 95 is electrically connected with the output terminal 60.

[0142] In the power conversion device 100, high-frequency noise and ripple voltage may be generated at the output end, and if these high-frequency noise and ripple voltage are not filtered, they will have adverse effects on the load circuit, such as affecting the stability of the circuit, increasing the noise of the circuit, etc. Therefore, by arranging the output filter circuit 95, the present application can be used to eliminate or improve these high-frequency noise and ripple voltage, so as to filter out these unwanted components to a certain extent, and only provide flat or sinusoidal voltage to the load, thereby improving the purity of the output signal and improving the power supply voltage quality output by the power conversion device 100 to the load.

[0143] The output filter circuit 95 is located in the second area 12, and is arranged between the output terminal 60 and the transformer 52 of the DC / DC power conversion circuit 50. Since the input end of the output filter circuit 95 needs to be electrically connected with the DC / DC power conversion circuit 50, and the output end of the output filter circuit 95 needs to be electrically connected with the output terminal 60, the present application arranges the output filter circuit 95 in the second area 12 and between the output terminal 60 and the transformer 52 of the DC / DC power conversion circuit 50, so as to facilitate the electrical connection between the output filter circuit 95 and the output terminal 60 and the DC / DC power conversion circuit 50 respectively, shorten the wiring distance of the power conversion device 100, and reduce the complexity of the line connection.

[0144] In some examples, there is a gap between the output filter circuit 95 and the transformer 52. In this way, the gap serves as a heat dissipation air duct, so that the air of the fan 20 passes through the gap to carry away the heat of the output filter circuit 95 and the transformer 52 respectively, thereby improving the heat dissipation efficiency of the output filter circuit 95 and the transformer 52.

[0145] In an embodiment of the present application, please refer to Figure 3 and Figure 5 It is shown that the input terminal 30 includes a plurality of first pads arranged at intervals along a first direction, and the output terminal 60 includes a plurality of second pads arranged at intervals along the first direction; the surface of the first pad and the surface of the second pad are provided with a gold layer. Wherein, the first direction is parallel to the arrangement direction of the first area 11 and the second area 12.

[0146] The input terminal 30 of the present application is arranged to include a plurality of first pads arranged at intervals along a first direction, and the output terminal 60 is arranged to include a plurality of second pads arranged at intervals along the first direction, and a gold layer is provided on the surface of the first pad and the surface of the second pad. This structure is commonly known as a gold finger, and the use of the gold finger can realize stable electrical connection of the power conversion device 100 and other components. The present application arranges the input terminal 30 and the output terminal 60 as a gold finger, which can realize electrical connection with other components through plug-in connection by using the gold finger. This electrical connection method does not need complex wiring, and is convenient for maintenance and replacement, which can improve the maintainability and flexibility of the equipment.

[0147] Figure 14 The structural schematic diagram of the shell 961 and the protrusion 962 provided in an embodiment of the present application is shown in Figure 15 The structural schematic diagram of the shell 961, the protrusion 962 and the screw member 963 provided in an embodiment of the present application is shown in Figure 5 , Figure 14 and Figure 15In an embodiment of the present application, the power conversion device 100 further comprises a housing 961 having a receiving cavity, and the first circuit board 10, the fan 20, the input terminal 30, the AC / DC power conversion circuit 40, the DC / DC power conversion circuit 50 and the output terminal 60 are all arranged in the receiving cavity. By arranging the housing 961, the power conversion device 100 can physically protect the components such as the first circuit board 10, the fan 20, the input terminal 30, the AC / DC power conversion circuit 40, the DC / DC power conversion circuit 50 and the output terminal 60 from water vapor and the like, and can also make the appearance of the power conversion device 100 more neat and prevent the exposed components from causing safety risks.

[0148] In some examples, the outer side wall of the housing 961 has a sliding groove, so that the power conversion device 100 can be slidably connected to the guide rail on the cabinet 500 of the power supply equipment 01 through the sliding groove, so as to facilitate the quick assembly of the power conversion device 100 into the cabinet 500 of the power supply equipment 01.

[0149] For example, the inner wall of the housing 961 is provided with a protrusion 962, the first circuit board 10 is arranged on the side of the protrusion 962 away from the housing 961, and the power conversion device 100 further comprises a threaded member 963, one end of the threaded member 963 is connected to the first circuit board 10 in sequence through the housing 961 and the protrusion 962, and the protrusion 962 is made of insulating material.

[0150] In the present application, the protrusion 962 made of insulating material is fixed to the inner wall of the housing 961, and the first circuit board 10 is located on the side of the protrusion 962 away from the housing 961, so that the protrusion 962 is arranged between the housing 961 and the first circuit board 10, and can support the first circuit board 10 and achieve insulating 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.

[0151] For example, the specific structure of the protrusion 962 is not limited in the present application, as long as the protrusion 962 can separate the first circuit board 10 and the housing 961 by a certain distance and achieve the insulation of the first circuit board 10 and the housing 961. For example, the protrusion 962 is a block structure having a through hole, or the protrusion 962 is a plate structure having a through hole, or the protrusion 962 is a strip structure having a through hole.

[0152] For example, the inner wall of the housing 961 has a protrusion 9611 corresponding to the sliding groove, and the protrusion 962 is arranged on the inner wall of the housing 961 having the protrusion 9611.

[0153] In addition, the recess 9612 is arranged at the convex strip 9611, and the part of the convex 962 is fixed in the recess 9612, so that the space at the convex strip 9611 can be used, the occupation of the convex 962 to other space in the shell 961 is reduced, and the area utilization in the shell 961 is improved.

[0154] In an example, the first circuit board 10 is fixed with a welding nut 14, and the welding nut 14 is fixed at the position corresponding to the screw part 963, so that when the screw part 963 is connected with the first circuit board 10 by penetrating the shell 961 and the convex 962, the screw part 963 only needs to be screwed into the welding nut 14.

[0155] In an example, as shown in Figure 14 The fan 20 is fixed at the side wall of the shell 961.

[0156] In some examples, the shell 961 comprises a first shell and a second shell, and the first shell and the second shell are buckled together, so that the assembly is convenient. For example, the first shell comprises a buckling groove, the second shell comprises a buckling part matched with the buckling groove, and the buckling part of the second shell is buckled in the buckling groove of the first shell; vice versa (i.e. the second shell comprises a buckling groove, the first shell comprises a buckling part matched with the buckling groove, and the buckling part of the first shell is buckled in the buckling groove of the second shell).

[0157] In the description of the specification, the specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power conversion device, characterized by, The first circuit board, a fan, and input terminals, an AC / DC power conversion circuit, a DC / DC power conversion circuit, and output terminals disposed on the first circuit board; The input terminals are electrically connected to the input terminals of the AC / DC power conversion circuit, the output terminals of the AC / DC power conversion circuit are electrically connected to the input terminals of the DC / DC power conversion circuit, and the output terminals of the DC / DC power conversion circuit are electrically connected to the output terminals; The first circuit board has opposite first and second edges, the fan is located at the first edge, and the input terminals and the output terminals are both located at the second edge; the circuit board has an air passing area, and a first area and a second area located on opposite sides of the air passing area, the air passing area extends from one side of the circuit board where the fan is located to one side of the circuit board where the output terminals are located, and the arrangement direction of the first area and the second area is parallel to the arrangement direction of the input terminals and the output terminals; Part of the AC / DC power conversion circuit is located in the first area, and the other part of the AC / DC power conversion circuit and the DC / DC power conversion circuit are located in the second area; The air passing area includes a gap between the part of the AC / DC power conversion circuit located in the first area and the part of the AC / DC power conversion circuit located in the second area, and a gap between the part of the AC / DC power conversion circuit located in the first area and the DC / DC power conversion circuit.

2. The power conversion device of claim 1, wherein, The power inductance of the AC / DC power conversion circuit is located in the first area, and the electronic tube connected to the current input terminal of the power inductance is located in the first area; the power tube connected to the current output terminal of the power inductance is located in the second area; The power inductance is located on one side of the input terminals facing the first edge, and the electronic tube connected to the current input terminal of the power inductance is located on one side of the power inductance facing the first edge; The gap between the part of the AC / DC power conversion circuit located in the first area and the part of the AC / DC power conversion circuit located in the second area includes a gap between the electronic tube connected to the current input terminal of the power inductance and the power tube connected to the current output terminal of the power inductance; The gap between the part of the AC / DC power conversion circuit located in the first area and the DC / DC power conversion circuit includes a gap between the power inductance and the DC / DC power conversion circuit.

3. The power conversion device of claim 2, wherein, The power tube connected to the current output terminal of the power inductance and the power tube connected to the primary side of the transformer of the DC / DC power conversion circuit are both located on one side of the transformer facing the first edge; The power tube connected to the current output terminal of the power inductance and the power tube connected to the primary side of the transformer of the DC / DC power conversion circuit both have a gap with the transformer.

4. The power conversion device of claim 3, wherein, The power conversion device further comprises a second circuit board fixedly connected to the first circuit board, a board surface of the second circuit board being perpendicular to a board surface of the first circuit board; The power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer are fixedly connected to the second circuit board; At least one of a main body of the power tube connected to the current output end of the power inductor and a main body of the power tube connected to the primary side of the transformer is located on a 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 area, and the fan is located on a side of the power tube connected to the current output end of the power inductor and the power tube connected to the primary side of the transformer respectively away from the transformer, and the fan is used to blow air towards the power tube connected to the current output end of the power inductor and the power tube 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 tube connected to the secondary side of the transformer is located in the second area, and there is a gap between the power tube connected to the secondary side of the transformer and the transformer; The power tube connected to the secondary side of the transformer is located on a side of the transformer facing the air passing area, or the power tube connected to the secondary side of the transformer is located on a side of the transformer away from the air passing area.

7. The power conversion device of claim 6, wherein, The power conversion device further comprises a third circuit board fixedly connected to the first circuit board, a board surface of the third circuit board being perpendicular to a board surface of the first circuit board; The power tube 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 end of the transformer has a pin, an end of the pin away from the transformer facing the power tube connected to the secondary side of the transformer, and the pin is connected to the power tube 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 comprises a first capacitor electrically connected to an output end of the AC / DC power conversion circuit and an input end of the DC / DC power conversion circuit; The first capacitor is located in the first area, and the first capacitor is located on a 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 electronic tube connected to the current input end of the power inductor and the first capacitor.

10. The power conversion device of claim 9, wherein, The power conversion device further comprises 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 area, 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 auxiliary source circuit and the transformer of the DC / DC power conversion circuit.

11. The power conversion device of any of claims 1-10, wherein, The power conversion device further comprises an input filter circuit, an input end of the input filter circuit being electrically connected to the input terminal, and an output end of the input filter circuit being electrically connected to the AC / DC power conversion circuit; The input filter circuit is located in the first area, and the input filter circuit is located between the input terminal and a power inductor of the AC / DC power conversion circuit, and there is a gap between the input filter circuit and the power inductor.

12. The power conversion device of claim 11, wherein, The first circuit board is fixed with a partition plate, the partition plate is located in the air passing area, and the input filter circuit and a power tube connected to a secondary side of a 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 comprises an output filter circuit, an input end of the output filter circuit is electrically connected with an output end of the DC / DC power conversion circuit, and an output end of the output filter circuit is electrically connected with the output terminal. The output filter circuit is located in the second area, and the output filter circuit is arranged between the output terminal and a transformer of the DC / DC power conversion circuit, and there is 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 comprises a shell with a containing cavity, and 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 arranged in the containing cavity. An inner wall of the shell is provided with a protrusion, the first circuit board is arranged on a side of the protrusion away from the shell, the power conversion device further comprises a screwing piece, one end of the screwing piece passes through the shell and the protrusion in sequence and is connected with the first circuit board, and the protrusion is made of insulating material.

15. A power supply device, characterized by comprising: Comprise: A cabinet; A plurality of power conversion devices as claimed in any one of claims 1-14, and the plurality of power conversion devices are located in the cabinet, and the plurality of power conversion devices are connected in parallel.

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