Power conversion device and energy storage equipment

Abstract

The utility model relates to a power conversion device and energy storage equipment. The power conversion device comprises a power cavity, a heat dissipation cavity and a maintenance cavity. The heat dissipation cavity is located on one side of the power cavity in the first direction, and the maintenance cavity is located on one side of the power cavity in the second direction. The first direction is horizontal, and the second direction is opposite to the first direction. A circuit board is arranged in the power cavity, a plurality of electronic devices are installed on the circuit board, the electronic devices are arranged on a first plane perpendicular to the first direction, and a heat dissipation device is arranged in the heat dissipation cavity. The arrangement mode of the heat dissipation cavity, the power cavity and the maintenance cavity is optimized, the structure and the size of the power conversion device are reduced, and the connection complexity of the power conversion device is reduced. The heat dissipation device is arranged to timely dissipate heat generated by the circuit board in the power cavity, so that the stability and reliability of the power conversion equipment are improved, and the service life of the power conversion equipment is further prolonged.

Description

TECHNICAL FIELD

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

[0002] The power conversion device (PCS) connects the battery device with the power grid, and converts between alternating current and direct current, thereby charging and discharging the battery device. The power conversion device in the prior art has a complex structure, a cumbersome and low-efficiency assembly process with the battery module, and a complex wiring and long installation time when connected with the power grid. In addition, when the power conversion device is working, the heat generated by the electronic devices in the device will cause a large amount of heat to accumulate in the power conversion device, and the accumulation of heat will cause safety hazards and low reliability of the power conversion device. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a power conversion device and an energy storage device which are simple to connect, easy to assemble, safe and reliable.

[0004] In a first aspect, the present application provides a power conversion device, which comprises a power cavity, a heat dissipation cavity and a maintenance cavity. The heat dissipation cavity is located on one side of the power cavity along a first direction, and the first direction is a horizontal direction. The maintenance cavity is located on one side of the power cavity along a second direction, and the second direction is opposite to the first direction. An electric circuit board is arranged in the power cavity, a plurality of electronic devices are mounted on the electric circuit board, and the electronic devices are arranged on a first plane perpendicular to the first direction. A heat dissipation device is arranged in the heat dissipation cavity.

[0005] In some embodiments, the heat dissipation device is provided with a contact surface in contact with the electric circuit board, and the contact surface comprises a plurality of heat conduction protrusions, each of which is arranged correspondingly according to the arrangement of the plurality of electronic devices.

[0006] In some embodiments, the heat dissipation device comprises a device cavity and a heat conduction cavity along a third direction, the third direction is perpendicular to the first direction, a heat dissipation device is arranged in the device cavity, and a heat dissipation structure is arranged in the heat conduction cavity. An opening is arranged on the end surface of the heat dissipation device along the third direction.

[0007] In some embodiments, the heat dissipation device is a heat dissipation fan, the heat dissipation fan is fixedly connected with the side wall of the heat dissipation device, an enclosure plate is arranged at the opening of the device cavity, and the enclosure plate seals the device cavity.

[0008] In some embodiments, the heat dissipation structure comprises a plurality of heat dissipation fins arranged at intervals along a fourth direction, and a heat dissipation air duct is formed between the heat dissipation fins.

[0009] In some embodiments, the heat dissipation fins are arranged at equal intervals.

[0010] In some embodiments, the maintenance cavity is provided with a mounting plate structure, the mounting plate structure forms a first mounting cavity and a second mounting cavity along a third direction respectively, the first mounting cavity faces a second direction, and the second mounting cavity faces a direction opposite to the first mounting cavity.

[0011] A plurality of wiring terminals are arranged in the first mounting cavity, the wiring terminals are connected to the circuit board through first mounting wires and connected to external devices through second mounting wires.

[0012] In some embodiments, the mounting plate structure includes a top plate, a partition plate, and side plates, the partition plate is close to the circuit board, the top plate is located on the top side of the partition plate, and the side plates are located on both sides of the partition plate, the top plate, the partition plate, and the two side plates enclose the first mounting cavity; the partition plate is provided with a first threading port, and the first mounting wires pass through the first threading port to connect the wiring terminals and the circuit board.

[0013] In some embodiments, the side plates are each provided with a second threading port, and the second mounting wires pass through any of the second threading ports to connect the wiring terminals and the external devices.

[0014] In some embodiments, the power conversion device further includes a box body provided with an opening along a second direction and a cover plate matched with the box body, and the heat dissipation cavity, the power cavity, and the maintenance cavity are sequentially distributed in the box body along the second direction.

[0015] In some embodiments, the box body includes a heat dissipation surface, the heat dissipation surface is an end surface of the box body facing a first direction, the heat dissipation surface includes a wind baffle provided along a fifth direction, the fifth direction is perpendicular to the first direction in a horizontal plane; the heat dissipation surface on both sides of the wind baffle is respectively provided with a first ventilation structure and a second ventilation structure, the first ventilation structure is arranged corresponding to the heat dissipation device, and the second ventilation structure is arranged corresponding to the heat dissipation structure.

[0016] In some embodiments, the first ventilation structure includes a honeycomb-shaped ventilation port, and the second ventilation structure includes a plurality of blade-shaped ventilation ports arranged according to a preset rule, the blade-shaped ventilation ports are inclined toward the inside of the box body, and the blade-shaped ventilation ports have smooth curved surfaces at both ends connected to the heat dissipation surface.

[0017] In some embodiments, a signal connection port is formed at the center of the bottom surface of the box body, a signal connection wire led out of the power cavity is connected to the battery device through the signal connection port; a pole port is formed at the end corner of the bottom surface, and a power wire led out of the power cavity is connected to the battery device through the pole port.

[0018] In some embodiments, third threading ports are respectively formed at both sides of the box body, and mounting wires led out of the maintenance cavity are connected to external devices through the third threading ports.

[0019] In some embodiments, the cover plate is detachably connected to the box body, and the cover plate is provided with a lamp plate display window at the edge thereof.

[0020] In a second aspect, the present disclosure provides an energy storage device, comprising the power conversion device according to the first aspect, and further comprising a battery device, wherein the power conversion device is connected to the battery device.

[0021] The power conversion device and the energy storage device, the power conversion device comprises a power cavity, a heat dissipation cavity and a maintenance cavity. The heat dissipation cavity is located on one side of the power cavity along a first direction, and the maintenance cavity is located on one side of the power cavity along a second direction. The first direction is a horizontal direction, and the second direction is opposite to the first direction, that is, the heat dissipation cavity and the maintenance cavity are arranged on two sides of the power cavity. The arrangement of the heat dissipation cavity, the power cavity and the maintenance cavity is optimized in the present application, the structure and the volume of the power conversion device are reduced, and the connection complexity of the power conversion device is reduced. The circuit board is arranged in the power cavity, a plurality of electronic devices are mounted on the circuit board, the electronic devices are arranged on a first plane perpendicular to the first direction, and the heat dissipation device is arranged in the heat dissipation cavity. The heat dissipation device can timely dissipate the heat generated by the circuit board in the power cavity, improve the stability and reliability of the power conversion device, and further improve the service life of the power conversion device. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 The structural schematic diagram of the power conversion device in some embodiments is shown in the following figure:

[0024] Figure 2 The schematic diagram of the heat dissipation device in some embodiments is shown in the following figure: Figure 1 ;

[0025] Figure 3 The schematic diagram of the heat dissipation device in some embodiments is shown in the following figure: Figure 2 ;

[0026] Figure 4 The schematic diagram of the heat dissipation structure in some embodiments is shown in the following figure: Figure 1 ;

[0027] Figure 2 The schematic diagram of the heat dissipation structure in some embodiments is shown in the following figure: Figure 6 ;

[0028] Figure 7 The schematic diagram of the mounting plate structure in some embodiments is shown in the following figure:

[0029] Figure 8 The schematic diagram of the box body and the cover plate in some embodiments is shown in the following figure:

[0030] Figure 1 Schematic diagram of the box of the power conversion device in some embodiments Figure 9 ;

[0031] Figure 2 Schematic diagram of the box of the power conversion device in some embodiments Figure 10 ;

[0032] Figure 3 Schematic diagram of the box of the power conversion device in some embodiments Figure 1 .

[0033] Explanation of reference signs:

[0034] 100, power cavity; 110, circuit board; 120, first plane;

[0035] 200, heat dissipation cavity; 210, heat dissipation device; 212, contact surface; 214, heat conduction protrusion; 220, equipment cavity; 222, heat dissipation equipment; 224, sealing plate; 226, fixed connecting piece; 230, heat conduction cavity; 232, heat dissipation structure;

[0036] 300, maintenance cavity; 310, mounting plate structure; 320, first mounting cavity; 322, wiring terminal; 330, partition plate; 332, first threading opening; 340, side plate; 342, second threading opening; 350, top plate;

[0037] 400, box; 410, cover plate; 420, heat dissipation surface; 430, wind shield; 432, first ventilation structure; 434, second ventilation structure; 440, signal connection opening; 450, pole column opening; 460, third threading opening; 470, lamp plate display window. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used herein in the specification merely describe specific embodiments of the present application for the purpose of the description and are not intended to limit the present application.

[0040] It can be understood that the terms "first", "second", and the like used in the present application can be used herein to describe various elements, but these elements are not limited by these terms. These terms only distinguish the first element from another element. For example, without departing from the scope of the present application, a first resistor can be referred to as a second resistor, and similarly, a second resistor can be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0041] It can be understood that "connection" in the following embodiments, if the circuits, modules, units, etc. connected to each other have the transmission of electrical signals or data, should be understood as "electrically connected", "communicatively connected" and the like.

[0042] It can be understood that "at least one" means one or more, and "multiple" means two or more. "At least part of the element" means part or all of the element.

[0043] As used herein, the singular forms "a", "an" and "the" can also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprise / comprising" or "have / having" or the like specify the presence of the stated features, integers, steps, operations, components, parts, or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in the specification includes any and all combinations of the related listed items.

[0044] In view of the problems of complex structure, complex connection and poor heat dissipation of power conversion devices in traditional energy storage devices, a power conversion device with simple structure, easy connection, small volume and fast heat dissipation is provided in some embodiments. Figure 1 As shown in Figure 1 The device includes a power cavity 100, a heat dissipation cavity 200 and a maintenance cavity 300. The heat dissipation cavity 200 is located on one side of the power cavity 100 along a first direction, and the maintenance cavity 300 is located on one side of the power cavity 100 along a second direction. The first direction is a horizontal direction, and the second direction is opposite to the first direction.

[0045] Please refer to Figure 1 The first direction is a horizontal direction, for example, along the X direction. The second direction is opposite to the first direction, for example, in the opposite direction of the X direction.

[0046] Please continue to refer to Figure 2 The power cavity 100 is provided with a circuit board 110, and a plurality of electronic devices are mounted on the circuit board 110. The electronic devices are arranged on a first plane 120 perpendicular to the first direction. The heat dissipation cavity 200 is provided with a heat dissipation device 210.

[0047] The circuit board 110 is disposed within the power cavity 100 on the side near the heat dissipation cavity 200. Multiple electronic components (not shown) are mounted on the circuit board 110.

[0048] Electronic components can include capacitors, relays, resistors, optocouplers, inductors, etc. The heat generated by these electronic components can cause the temperature within the power cavity to rise, affecting the stability of the power conversion device and also impacting the lifespan of the electronic components. For example... Figure 3 As shown, in this embodiment, a heat dissipation device 210 is provided inside the heat dissipation cavity 200. The heat dissipation device 210 can be thermally connected to the circuit board 110 to dissipate heat from the circuit board 110.

[0049] In some embodiments, the heat dissipation device 210 has a contact surface 212 that contacts the circuit board 110. The contact surface 212 includes a plurality of thermally conductive protrusions 214. Each thermally conductive protrusion 214 is arranged according to the arrangement of the plurality of electronic components.

[0050] Please refer to Figure 4 The diagram shows a schematic of the heat dissipation device 210. Multiple thermally conductive protrusions 214 are provided on the contact surface 212 where the heat dissipation device 210 contacts the circuit board 110. The size and number of the thermally conductive protrusions 214 are not limited. The thermally conductive protrusions 214 are arranged according to the arrangement of electronic components on the circuit board 110. It can be understood that for areas on the circuit board 110 where electronic components are densely arranged, heat accumulates quickly and efficiently. Multiple or large thermally conductive protrusions 214 are provided on the contact surface 212 to achieve rapid heat dissipation from densely packed areas of electronic components.

[0051] In some implementations, the contact surface 212 can be a metal plate with high thermal conductivity, such as an aluminum surface. It is understood that this embodiment does not limit the material of the heat dissipation device 210, as long as it can achieve heat dissipation of the circuit board 110 in the power cavity 100.

[0052] Please refer to Figure 5 The diagram shows a heat dissipation device 210. The circuit board 110 is tightly attached to the contact surface 212 to ensure efficient heat transfer on the circuit board 110 and improve the heat dissipation efficiency of the power cavity 100.

[0053] In some embodiments, the heat dissipation device 210 includes a device cavity 220 and a heat conduction cavity 230 along a third direction. The third direction is perpendicular to the first direction. A heat dissipation device 222 is provided in the device cavity 220. A heat dissipation structure 232 is provided in the heat conduction cavity 230. An opening is provided on the end face of the heat dissipation device 210 along the third direction.

[0054] Please refer to Figure 5The heat dissipation device 210 is shown in a schematic view. The third direction is perpendicular to the first direction, and can be a direction along the Z axis. The heat dissipation device 210 has the heat conduction cavity 230 and the device cavity 220 arranged in the third direction. The device cavity 220 is used to dissipate heat conducted by the contact surface 212 by the heat dissipation device 222. The heat conduction cavity 230 includes the heat dissipation structure 232. The heat conduction cavity 230 is used to dissipate heat conducted by the contact surface 212 by heat exchange of the heat dissipation structure 232.

[0055] The heat dissipation device 210 of the embodiment includes the device cavity 220 and the heat conduction cavity 230, and can combine different heat dissipation modes to improve the heat dissipation efficiency of the power cavity 100.

[0056] In some specific embodiments, the heat dissipation device 222 is a heat dissipation fan. The heat dissipation fan is fixedly connected to the side wall of the heat dissipation device 210. The opening of the device cavity 220 is provided with a sealing plate 224 for sealing the device cavity 220.

[0057] Please refer to Figure 5 The heat dissipation device 210 is shown in a schematic view. The heat dissipation device 222 in the device cavity 220 is a heat dissipation fan. The heat dissipation fan blows air outward, so that the air heated by the heat dissipation structure 232 in the heat dissipation cavity 200 is discharged to the outside, and at the same time, negative pressure is generated in the heat dissipation cavity 200, so that cold air from the outside enters the heat dissipation device and flows through the heat dissipation structure 232 to exchange heat and carry away heat. The air in the heat dissipation cavity 200 is blown in the device cavity 220, which improves the exchange of air in the heat dissipation cavity 200 with other cavities or external air, thereby improving the heat dissipation efficiency of the heat dissipation cavity 200.

[0058] As shown in Figure 6 The device cavity 220 is provided with an opening in the third direction, i.e. the Z axis direction. The opening of the device cavity 220 is provided with a sealing plate 224 for sealing the device cavity 220. The device cavity 220 is sealed by the sealing plate 224, so that the air exchange is concentrated through the mounting port of the heat dissipation device 222 when the heat dissipation device 222 is working.

[0059] The heat dissipation device 222 is fixedly connected to the side wall of the heat dissipation device 210 by the fixed connecting piece 226. For example, the fixed connecting piece 226 can be a screw.

[0060] In other specific embodiments, the heat dissipation structure 232 includes a plurality of heat dissipation fins arranged at intervals in the fourth direction. The heat dissipation fins form a heat dissipation air duct.

[0061] The fourth direction can be along the Y axis. Please continue to refer to Figure 6The heat dissipation fins can increase the contact area between the heat dissipation structure 232 and the heat conduction cavity 230, and improve the heat dissipation efficiency of the heat conduction cavity 230. The number of heat dissipation fins is at least two, and each heat dissipation fin is in parallel structure. Adjacent heat dissipation fins form a heat dissipation air duct, so that the gas in the heat conduction cavity 230 can flow along the Z direction while cooling the heat dissipation cavity 200.

[0062] In some exemplary embodiments, the heat dissipation fins are arranged at equal intervals.

[0063] The equal interval arrangement of the heat dissipation fins means that the heat dissipation fins are regularly distributed at equal intervals. The equal interval arrangement of the heat dissipation fins helps to keep the temperature relatively uniform in each part, avoid the situation that some areas are overheated and other areas are relatively cold, and improve the heat dissipation efficiency. At the same time, the equal interval arrangement of the heat dissipation fins has high stability, and is easy to install and maintain.

[0064] In some embodiments, the maintenance cavity 300 is provided with a mounting plate structure 310. The mounting plate structure 310 forms a first mounting cavity 320 and a second mounting cavity in the third direction respectively. The first mounting cavity 320 faces the second direction. The second mounting cavity faces the opposite direction of the first mounting cavity 320. A plurality of terminal connectors 322 are arranged in the first mounting cavity 320. The terminal connectors 322 are connected to the circuit board 110 through first mounting wires and connected to external devices through second mounting wires.

[0065] Please refer to Figure 6 The mounting plate structure 310 is shown in the schematic diagram. The mounting plate structure 310 forms a first mounting cavity 320 and a second mounting cavity in the third direction, that is, the Z-axis direction. The first mounting cavity 320 faces the second direction, that is, the opposite direction of the X-axis. The second mounting cavity is arranged in the opposite direction of the first mounting cavity 320, that is, facing the power cavity 100.

[0066] As shown in Figure 6 A plurality of terminal connectors 322 are arranged in the first mounting cavity 320. One end of the terminal connector 322 is connected to the circuit board 110 through the first mounting wire, and the other end is connected to the external device through the second mounting wire.

[0067] The power conversion device structure of the embodiment is simple. When it is necessary to connect with external devices, only the terminal connector 322 in the mounting plate structure 310 of the maintenance cavity 300 needs to be operated to connect with the external devices. The connection mode is simple and easy to operate.

[0068] In some embodiments, the mounting plate structure 310 comprises a top plate 350, a partition plate 330 and side plates 340. The partition plate 330 is close to the circuit board 110. The top plate 350 is on the top side of the partition plate 330 and the side plates 340 are on the two sides of the partition plate 330. The top plate 350, the partition plate 330 and the two side plates 340 enclose the first mounting cavity 320. The partition plate 330 is provided with a first threading port 332. The first mounting wire passes through the first threading port 332 to connect the terminal 322 with the circuit board 110.

[0069] Please continue to refer to Figure 7 The first mounting cavity 320 in the mounting plate structure 310 is enclosed by the partition plate 330, the top plate 350 and the two side plates 340 of the mounting plate structure 310. The partition plate 330 is the plate close to the circuit board 110 in the mounting plate structure 310, i.e. the plate of the mounting plate structure 310 facing the X-axis direction. The partition plate 330 is used to separate the maintenance cavity 300 from the power cavity 100. The partition plate 330 is provided with the first threading port 332 through which the first mounting wire is connected with the circuit board 110.

[0070] In some other embodiments, the side plates 340 on the two sides of the partition plate 330 in the mounting plate structure 310 are respectively provided with a second threading port 342. The second mounting wire passes through any of the second threading ports 342 to connect the terminal 322 with an external device.

[0071] Please continue to refer to Figure 7 The partition plate 330 is provided with the second threading port 342 on the two sides in the Y-axis direction and the direction opposite to the Y-axis direction. The second mounting wire is connected with the terminal 322 through the second threading port 342. In operation, any of the second threading ports 342 can be selected according to the installation position of the energy storage device or the power conversion device.

[0072] In some other embodiments, the second threading port 342 can also be opened at the connection between the side plate 340 and the partition plate 330, i.e. the second threading port 342 passes through part of the side plate 340 and part of the partition plate 330.

[0073] In some other embodiments, the mounting plate structure 310 can also be provided with a threading port for connecting with other devices of the battery device or the energy storage device. Details are not described herein.

[0074] In some embodiments, the power conversion device further comprises a box 400 provided with an opening in a second direction and a cover plate 410 matched with the box 400. The heat dissipation cavity 200, the power cavity 100 and the maintenance cavity 300 are sequentially distributed in the box 400 along the second direction.

[0075] Please refer to Figure 8A schematic diagram of the housing 400 of the power conversion device. The second direction is the direction opposite to the X-axis in the diagram. The heat dissipation cavity 200, the power cavity 100, and the maintenance cavity 300 are distributed sequentially along the second direction. The heat dissipation cavity 200 directly dissipates the heat generated by the power cavity 100, and the maintenance cavity 300 is connected to external equipment. This can optimize the structure of the power conversion device, reduce the size of the power conversion device, and improve the heat dissipation efficiency of the power conversion device.

[0076] The enclosure 400 opens in a second direction, facilitating wiring and maintenance of the power conversion device at the opening. A cover plate 410 is provided at the opening of the enclosure 400 to seal the enclosure 400. A high level of sealing can be provided between the cover plate 410 and the enclosure 400 to facilitate the use of the power conversion device in different scenarios.

[0077] In some other embodiments, such as Figure 8 As shown, a fan is also installed inside the housing 400. The fan inside the housing 400 can circulate the air inside the housing 400, improving the airflow inside the power heat exchanger.

[0078] In some embodiments, the housing 400 includes a heat dissipation surface 420, which is the end face of the housing 400 facing a first direction. The heat dissipation surface 420 includes a baffle plate 430 disposed along a fifth direction. The fifth direction is perpendicular to the first direction in the horizontal plane. A first ventilation structure 432 and a second ventilation structure 434 are respectively disposed on the heat dissipation surface 420 on both sides of the baffle plate 430. The first ventilation structure 432 is disposed corresponding to the heat dissipation device 222, and the second ventilation structure 434 is disposed corresponding to the heat dissipation structure 232.

[0079] Please refer to Figure 8 The diagram shows the housing 400. The first direction is along the X-axis, and the fifth direction is perpendicular to the first direction, which can be the opposite direction of the Y-axis. It can be understood that in some implementations, the fifth direction can also be along the Y-axis, i.e., the same as the fourth direction.

[0080] The end face of the housing 400 facing the X-axis is the heat dissipation surface 420. The housing 400 has an opening in the opposite direction to the X-axis, and the heat dissipation surface 420 is parallel to the opening surface of the housing 400. For example... Figure 8 As shown, a baffle plate 430 is provided on the heat dissipation surface 420 along the opposite direction of the Y-axis, and a first ventilation structure 432 and a second ventilation structure 434 are respectively provided on the heat dissipation surface 420 on both sides of the baffle plate 430.

[0081] The first ventilation structure 432 is arranged corresponding to the heat dissipation device 222 and cooperates with the heat dissipation device 222 to dissipate heat. When the heat dissipation device 222 is a heat dissipation fan, the first ventilation structure 432 exhausts the hot air blown by the heat dissipation fan. The second ventilation structure 434 is arranged corresponding to the heat dissipation structure 232 and cooperates with the heat dissipation structure 232 to dissipate heat. When the heat dissipation structure 232 is a heat dissipation fin, the second ventilation structure 434 flows in external air, cooperates with the air duct formed in the heat dissipation fin, accelerates the air circulation in the heat dissipation structure 232, and improves the heat dissipation efficiency of the heat dissipation cavity 200.

[0082] In some specific embodiments, the first ventilation structure 432 includes a honeycomb-shaped ventilation port. The second ventilation structure 434 includes a plurality of blade-shaped ventilation ports arranged according to a preset rule. The blade-shaped ventilation ports are inclined towards the inside of the box body 400. The two ends of the blade-shaped ventilation ports connected with the heat dissipation surface 420 have smooth curved surfaces.

[0083] Please continue to refer to Figure 9 The first ventilation structure 432 is arranged as a honeycomb-shaped ventilation port. The design of the honeycomb-shaped ventilation port can make the circulating air flow uniform and analyze, which not only improves the heat dissipation efficiency of the device, but also saves space, reduces noise, and enhances durability.

[0084] The second ventilation structure 434 is arranged as a blade-shaped ventilation port inclined towards the inside of the box body 400. The blade-shaped ventilation port can effectively guide the air flow and enhance the uniformity and stability of the air flow. The arrangement of the blade-shaped ventilation port can optimize the direction of the air flow, so that the air can pass through the heat dissipation area more effectively, increasing the heat exchange efficiency. The smooth curved surface connection between the blade-shaped ventilation port and the heat dissipation surface 420 helps to reduce the resistance in the air flow process. The smooth transition curve avoids sharp angles and abrupt structures, reduces the disturbance of the air flow, and makes the air flow smoother.

[0085] Please continue to refer to Figure 10 In some embodiments, the box body 400 is provided with a third threading port 460 on each side. The installation wire led out of the maintenance cavity 300 is connected with external devices through the third threading port 460. The third threading port 460 is arranged corresponding to the second threading port 342, which facilitates the connection of the power conversion device with external equipment.

[0086] In some embodiments, a signal connection port 440 is arranged at the center of the bottom surface of the box body 400. The signal connection line led out of the power cavity 100 is connected with the battery device through the signal connection port 440. The end angle of the bottom surface is provided with a pole port 450, and the power line led out of the power cavity 100 is connected with the battery device through the pole port 450.

[0087] Please refer to ​The box 400 is shown in a schematic view. The signal connection port 440 and the pole port 450 are arranged on the bottom surface of the box 400, i.e. the end surface facing the opposite direction of the Z axis. The signal connection port 440 is arranged at the center of the bottom surface, and the power conversion device is connected to the signal terminal of the battery device through the signal connection port 440. For example, the signal terminal of the battery device can be connected to the signal connection line led out from the power cavity 100 through the signal connection port 440, or the signal connection line led out from the power cavity 100 can be connected to the signal terminal of the battery device through the signal connection port 440.

[0088] The pole port 450 is arranged at the end corner of the bottom surface, and includes the pole port 450 of the positive electrode and the pole port 450 of the negative electrode. As shown in the figure, the positive electrode pole and the negative electrode pole are arranged at the edge of the bottom surface close to the end surface of the box 400 facing the Z axis, and are arranged along the Y axis and the opposite direction of the Y axis, respectively. The power conversion device is connected to the electrode of the battery device through the pole port 450. For example, the electrode of the battery device can be connected to the power conversion device through the pole port 450.

[0089] Please refer to ​ In some embodiments, the cover plate 410 is detachably connected to the box 400, and the cover plate 410 is provided with a lamp plate display window 470 at the edge. The lamp plate display window 470 displays the working state of the power conversion device.

[0090] In some embodiments, a power storage device is also provided, which includes the power conversion device provided in the above embodiments. The power storage device further includes a battery device, and the power conversion device is connected to the battery device.

[0091] In the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least some of the embodiments or examples of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiments or examples.

[0092] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present specification.

[0093] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A power conversion device, characterized by, The application relates to a power cavity (100), a heat dissipation cavity (200) and a maintenance cavity (300), wherein the heat dissipation cavity (200) is located on one side of the power cavity (100) along a first direction, the first direction is a horizontal direction; the maintenance cavity (300) is located on one side of the power cavity (100) along a second direction, the second direction is opposite to the first direction; a circuit board (110) is arranged in the power cavity (100), a plurality of electronic devices are mounted on the circuit board (110), and the electronic devices are arranged on a first plane (120) perpendicular to the first direction; and a heat dissipation device (210) is arranged in the heat dissipation cavity (200).

2. The power conversion device of claim 1, wherein, The heat dissipation device (210) is provided with a contact surface (212) in contact with the circuit board (110), the contact surface (212) comprises a plurality of heat conduction protrusions (214), and each heat conduction protrusion (214) is arranged correspondingly according to the arrangement of the plurality of electronic devices.

3. The power conversion device of claim 1, wherein, The heat dissipation device (210) comprises a device cavity (220) and a heat conduction cavity (230) along a third direction, the third direction is perpendicular to the first direction, a heat dissipation device (222) is arranged in the device cavity (220), and a heat dissipation structure (232) is arranged in the heat conduction cavity (230); and an opening is arranged on an end surface of the heat dissipation device (210) along the third direction.

4. The power conversion device of claim 3, wherein, The heat dissipation device (222) is a heat dissipation fan, the heat dissipation fan is fixedly connected with a side wall of the heat dissipation device (210), an enclosing plate (224) is arranged at the opening of the device cavity (220), and the enclosing plate (224) seals the device cavity (220).

5. The power conversion device of claim 3, wherein, The heat dissipation structure (232) comprises a plurality of heat dissipation fins arranged at intervals along a fourth direction, and heat dissipation air ducts are formed between the heat dissipation fins.

6. The power conversion device of claim 5, wherein, The heat dissipation fins are arranged at equal intervals.

7. The power conversion device of claim 3, wherein, A mounting plate structure (310) is arranged in the maintenance cavity (300), the mounting plate structure (310) forms a first mounting cavity (320) and a second mounting cavity along the third direction, the first mounting cavity (320) faces the second direction, and the second mounting cavity faces the opposite direction of the first mounting cavity (320); A plurality of wiring terminals (322) are arranged in the first mounting cavity (320), the wiring terminals (322) are connected with the circuit board (110) through first mounting wires and connected with external devices through second mounting wires.

8. The power conversion device of claim 7, wherein, The mounting plate structure (310) comprises a top plate (350), a partition plate (330) and side plates (340), the partition plate is close to the circuit board (110), the top plate (350) is located on the top side of the partition plate (330), the side plates (340) are located on both sides of the partition plate (330), and the top plate (350), the partition plate (330) and the two side plates (340) form the first mounting cavity (320); The partition plate (330) is provided with a first wire penetrating opening (332), and the first mounting wires pass through the first wire penetrating opening (332) to connect the wiring terminals (322) and the circuit board (110).

9. The power conversion device of claim 8, wherein, The side plates (340) are each provided with a second threading opening (342), and a second mounting wire is threaded through any of the second threading openings (342) to connect the terminal (322) with the external device.

10. The power conversion device of claim 3, wherein, The power conversion device further comprises a box (400) provided with an opening along the second direction and a cover plate (410) matched with the box (400), and the heat dissipation cavity (200), the power cavity (100) and the maintenance cavity (300) are sequentially arranged in the box (400) along the second direction.

11. The power conversion device of claim 10, wherein, The box (400) comprises a heat dissipation surface (420), which is an end surface of the box (400) facing the first direction, and the heat dissipation surface (420) comprises a wind baffle (430) arranged along a fifth direction, which is perpendicular to the first direction in a horizontal plane; the heat dissipation surface (420) on both sides of the wind baffle (430) is respectively provided with a first ventilation structure (432) and a second ventilation structure (434), the first ventilation structure (432) is arranged corresponding to the heat dissipation device (222), and the second ventilation structure (434) is arranged corresponding to the heat dissipation structure (232).

12. The power conversion device of claim 11, wherein, The first ventilation structure (432) comprises a honeycomb-shaped ventilation opening, and the second ventilation structure (434) comprises a plurality of blade-shaped ventilation openings arranged according to a preset rule, the blade-shaped ventilation openings are inclined towards the inside of the box (400), and the two ends of the blade-shaped ventilation openings connected with the heat dissipation surface (420) have smooth curved surfaces.

13. The power conversion device of claim 10, wherein, A signal connection opening (440) is arranged at the center of the bottom surface of the box (400), and a signal connection wire led out of the power cavity (100) is connected with a battery device through the signal connection opening (440); an electrode post opening (450) is arranged at the end corner of the bottom surface, and a power wire led out of the power cavity (100) is connected with the battery device through the electrode post opening (450).

14. The power conversion device of claim 10, wherein, Third threading openings (460) are respectively arranged at both sides of the box (400), and a mounting wire led out of the maintenance cavity (300) is connected with an external device through the third threading openings (460).

15. The power conversion device of claim 10, wherein, The cover plate (410) is detachably connected with the box (400), and the cover plate (410) is provided with a lamp plate display window (470) at the edge thereof.

16. An energy storage device, comprising: The power conversion device comprises the energy storage device, and the energy storage device further comprises a battery device, and the power conversion device is connected with the battery device.

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