A power conversion device, energy storage system

Abstract

This invention provides a converter and energy storage system. The converter includes a cabinet, DC-side devices, AC-side devices, power devices, reactors, and several wiring components. The cabinet contains a first mounting area and a second mounting area arranged horizontally in a first direction. The DC-side devices and power devices are vertically arranged from bottom to top in the first mounting area; the AC-side devices and reactors are vertically arranged from bottom to top in the second mounting area. The DC-side devices, power devices, reactors, and AC-side devices are sequentially connected in a forward direction through various wiring components. The reactor has a first terminal on the upper side and a second terminal on the lower side, with the first terminal facing the side of the first mounting area to connect to the power device through a corresponding wiring component, and the second terminal facing away from the side of the first mounting area. The AC-side devices have a third terminal on the upper side and a fourth terminal on the lower side, with both the third and fourth terminals facing away from the side of the first mounting area. The third terminal is connected to the second terminal through a corresponding wiring component; the fourth terminal is suitable for external wiring. This converter has a smooth internal wiring path, which is beneficial for the compact design of the entire unit and for operation and maintenance.

Description

Technical Field

[0001] This invention relates to the field of power converter technology, specifically to a power converter and an energy storage system. Background Technology

[0002] Energy storage converters are core devices in energy storage systems used to achieve bidirectional conversion between DC power from the battery side and AC power from the grid side. Existing energy storage converters typically integrate major components such as DC-side components, power devices, AC-side components, and reactors within a cabinet. Due to the large number of components and the need for interconnection, current converters have convoluted and complex internal wiring paths, hindering overall compactness and ease of operation and maintenance. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects or problems in the background art and to provide a converter device and an energy storage system. The converter device has a smooth internal wiring path, which is conducive to the compactness of the whole machine and operation and maintenance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: Technical Solution 1: A converter device includes a cabinet, DC-side devices, AC-side devices, power devices, reactors, and several wiring components; the cabinet forms a first installation area and a second installation area arranged in a horizontal first direction; the DC-side devices and power devices are vertically arranged from bottom to top in the first installation area; the AC-side devices and reactors are vertically arranged from bottom to top in the second installation area; the DC-side devices, power devices, reactors, and AC-side devices are sequentially electrically connected in a forward direction through the wiring components; the reactor has a first terminal on the upper side and a second terminal on the lower side, with the first terminal facing the side where the first installation area is located to be connected to the power device through the corresponding wiring component, and the second terminal facing away from the side where the first installation area is located; the AC-side devices have a third terminal on the upper side and a fourth terminal on the lower side, with both the third and fourth terminals facing away from the side where the first installation area is located; the third terminal is connected to the second terminal through the corresponding wiring component; the fourth terminal is suitable for external wiring.

[0005] Technical Solution 2 based on Technical Solution 1: The AC side device has an operation panel for operating the AC side device, the operation panel is located on the side of the AC side device facing the first mounting area and exposed from the second mounting area.

[0006] Technical Solution 3 based on Technical Solution 2: The DC-side device avoids at least the operation panel on the AC-side device in the first direction.

[0007] Technical solution four, based on technical solution one, further includes a DC external connector and an AC external connector for external wiring; the DC external connector is connected to the DC-side device; the AC external connector is connected to the fourth terminal; the wiring components include a DC connector, a power connector, and a reactor connector; at least a portion of the DC connector extends vertically to connect the DC-side device and the power device; at least a portion of the power connector extends vertically to connect the power device and the reactor; at least a portion of the reactor connector extends vertically to connect the reactor and the AC-side device.

[0008] Technical solution five, based on any one of technical solutions two to four: The cabinet includes an outer shell and a first partition component and a second partition component located within the outer shell; the first partition component is disposed between the power device and the reactor, and the second partition component is disposed between the reactor and the AC side device, so as to cooperate with the outer shell to form a reactor housing compartment for accommodating the reactor; the cabinet has a first air inlet and a first air outlet in the reactor housing compartment for heat dissipation of the reactor.

[0009] Technical Solution Six based on Technical Solution Five: The first air inlet is located below the reactor; the first air outlet is located on the side and / or top of the cabinet, and is at least not lower than the reactor in the vertical direction.

[0010] Technical solution seven based on technical solution six: The cabinet further includes an air intake component located inside the outer shell; the air intake component has an air intake channel extending in the vertical direction and intakes air from the bottom of the cabinet, and its upper end forms the first air intake.

[0011] Technical solution eight based on technical solution seven: The air intake assembly is located in the middle of the cabinet along the first direction and includes two air intake ducts arranged along the second horizontal direction. The lower end of the air intake duct forms a second air inlet at the bottom of the cabinet. The AC side device has at least its operation panel located between the two air intake ducts.

[0012] Technical solution nine based on technical solution eight: The air intake assembly further includes an air expansion duct extending along the second direction. The upper end of the air expansion duct forms the first air inlet, and its lower end is connected to the upper ends of the two air intake ducts, and is provided with an upward and outwardly extending air guide surface.

[0013] In addition, the present invention also provides technical solution ten: an energy storage system, which includes an energy storage device, a transformer, and a converter device as described in any one of technical solutions one to nine, wherein the DC side of the converter device is connected to the energy storage device and the AC side is connected to the transformer. As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects: Traditional converter equipment typically employs three independent sections arranged horizontally: DC-side components, reactors, and AC-side components. Since the reactor is the heaviest component in the entire unit, it is conventionally placed fixed at the center of the bottom of the equipment to maintain a low center of gravity and ensure sufficient anti-tipping angle. This conventional layout, constrained by the center of gravity, leads to complex electrical connection paths. In actual wiring, DC current must first ascend to the power devices for conversion, the converted current must then extend downwards to connect to the reactor at the bottom, and finally be led horizontally to the AC-side components in the third section. This circuitous wiring method increases the length of the connecting copper busbars and power transmission losses. Furthermore, the reactor located in the middle of the equipment is obstructed by the surrounding components or compartments, making direct external inspection and maintenance impossible during operation. If the reactor fails, replacement often requires disassembly of the entire unit.

[0014] The technical solution provided in this application changes the original three-zone horizontal layout by setting up a first and second installation area along a horizontal first direction within the cabinet. DC-side devices and power devices are arranged vertically from bottom to top in the first installation area, while AC-side devices and reactors are arranged vertically from bottom to top in the second installation area. This layout ensures that the spatial position and electrical connection sequence of each device remain consistent. In the first installation area, DC-side devices are directly connected upwards to the power devices after being connected from the bottom. In the second installation area, the converted electrical energy is directly connected downwards from the reactors at the top to the AC-side devices at the bottom. Wiring components only require direct vertical connections and one horizontal connection, resulting in a smoother wiring path, avoiding cross-zone loops and intersections, and allowing direct maintenance of the reactors from the side of the cabinet. Overall, this facilitates the miniaturization and operation and maintenance of the converter equipment. Furthermore, this layout moves the reactor out of the center in the first direction, allowing the overall cabinet size in that direction to be shortened accordingly. This transforms the cabinet from a slender shape to a more square shape, thereby increasing the horizontal ground support span and compensating for the adverse effects of the shifted center of gravity. Additionally, the raised reactor provides more space in the lower part of the cabinet, allowing for more ample arrangement of AC-side components. This also allows the fourth terminal on the lower side of the AC side to be positioned closer to the bottom of the cabinet, facilitating on-site construction of energy storage stations and ensuring smooth external wiring. Moreover, conventional reactor terminals are located on the same side, while AC-side components require external wiring, so their wiring points are located on the outward-facing side. This necessitates that conventional reactor terminal blocks bend around AC-side components to achieve connections, or that the terminal blocks between the reactor and power devices bend and extend to connect, thus increasing the length of the terminal blocks. This solution specifically places the two terminals of the reactor on both sides of the reactor. This allows the power components to be directly connected to the reactor with a shorter distance, and the AC side devices can also be directly connected to the reactor with a shorter distance. This greatly reduces the bending and winding of the wiring components and the length of the wiring. Furthermore, having the terminals on the same side makes it easier to maintain the reactor and the AC side devices.

[0015] In technical solution two, the operation panel of the AC-side device is placed on the side facing the first installation area and exposed. This avoids the operation panel encroaching on the space on the side of the AC-side device where the wiring terminals are located, further reducing the size and footprint of the AC-side device and facilitating the connection of wiring components to the reactor. At the same time, the operation panel being exposed to the first installation area allows maintenance personnel to operate the AC-side device from the space of the first installation area. During maintenance, both DC-side and AC-side devices can be maintained simultaneously, further improving the convenience of maintenance.

[0016] In technical solution three, the DC-side device avoids the operation panel of the AC-side device in the first direction, thus preventing the DC-side device from blocking the operation panel of the AC-side device and further ensuring the maintainability of the AC-side device.

[0017] In technical solution four, the wiring components include DC terminal blocks and reactance terminal blocks extending in the vertical direction, which work in conjunction with power terminal blocks extending in the first direction. The routing of the terminal blocks is consistent with the layout of the devices, which can avoid multiple bends and crossings of the terminal blocks, reduce the length of the terminal blocks and heat loss, and reduce the assembly difficulty.

[0018] In technical solution five, the reactor is isolated and installed in the reactor housing compartment in the cabinet, which isolates the reactor from other devices. This is beneficial for setting the protection level of other devices and allows for the installation of independent heat dissipation systems, preventing the high-heat reactor from affecting the heat dissipation of other devices.

[0019] In technical solution six, the first air inlet located below the reactor can send external cold air into the reactor housing chamber. After passing through the reactor, the cold air carries away the heat and is discharged from the first air outlet located above. The airflow path is smooth, which can reduce the stagnation and circling of airflow inside the chamber and improve the heat dissipation efficiency.

[0020] In technical solution seven, an air intake component with an air intake channel is installed. The air intake channel draws air from the bottom of the cabinet, which can improve the problem of potentially high air temperature that may be directly drawn in due to the high position of the reactor housing compartment, and ensure the heat dissipation effect of the reactor.

[0021] In technical solution eight, the air intake assembly is positioned in the middle of the cabinet in the first direction. This utilizes the space remaining after the DC-side and AC-side components are installed, avoiding an increase in cabinet size and promoting overall cabinet miniaturization. The dual air intake ducts further utilize the space remaining on both sides of the cabinet in the second direction after the DC-side and AC-side components are installed, increasing the airflow into the reactor housing and improving the reactor's heat dissipation efficiency. Furthermore, it improves the balance of airflow within the reactor housing, preventing uneven heat dissipation at different locations. Simultaneously, the space between the two air intake ducts allows for the placement and exposure of the AC-side control panel, further enhancing the compactness of the internal components.

[0022] In technical solution nine, an air expansion duct is installed. The air guide surface on the air expansion duct can further diffuse the air introduced by the two spaced air inlets to the entire reactor housing chamber, reduce the airflow collision in the chamber, and improve the overall heat dissipation efficiency and heat dissipation uniformity of the reactor.

[0023] Technical solution ten provides an energy storage system, which includes the aforementioned converter equipment. Since the internal component layout and wiring of the converter equipment are conducive to the miniaturization and operation and maintenance of the converter equipment, the energy storage system can be set up more compactly and is convenient for operation and maintenance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the internal structure of the converter equipment according to an embodiment of the present invention; Figure 2 for Figure 1 A side view of the medium-voltage converter along the Y-axis. Figure 3 for Figure 2 A schematic diagram of the layout of internal electrical components in a medium-voltage converter. Figure 4 for Figure 1 A side view of the medium-voltage converter along the X-axis. Figure 5 for Figure 1 Schematic diagram of the cabinet structure of the medium converter equipment.

[0026] Explanation of key figure labels: Cabinet 100; First installation area 101; Second installation area 102; Outer shell 110; First partition assembly 121; Second partition assembly 122; Reactor housing 130; First air inlet 131; First air outlet 132; Air inlet assembly 140; Air inlet channel 141; Air inlet duct 142; Second air inlet 143; Expansion duct 144; Guide surface 145; Clearance space 150; DC side device 200; fifth terminal 211; sixth terminal 212; DC external connector 220; AC side device 300; third terminal 311; fourth terminal 312; operation panel 320; AC external connector 330; Power device 400; seventh terminal 411; eighth terminal 412; Reactor 500; First terminal 511; Second terminal 512; Wiring component 600; DC terminal block 610; power terminal block 620; reactor terminal block 630. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0029] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0030] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0031] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0032] Example This invention relates to an energy storage system, which includes an energy storage device, a transformer, and a converter device as described in this invention. The DC side of the converter device is connected to the energy storage device, and the AC side is connected to the transformer.

[0033] The energy storage equipment is typically an energy storage container, which is used in the form of a container. Inside the container is an electrochemical energy storage system, mainly composed of battery packs, a battery management system (BMS), and an energy management system (EMS). The transformer can be a box-type transformer. This converter can share a base with the transformer and be combined to form an integrated transformer-converter system.

[0034] The converter equipment involved in the embodiments of the present invention will be described in detail below.

[0035] Before describing the converter device, it is necessary to clearly define the various directions in this specification and claims. This specification and claims define a first direction, a second direction, and a vertical direction, which correspond to... Figure 1 The coordinate axes show the X-axis, Y-axis, and Z-axis directions.

[0036] Reference Figure 1 The converter mainly includes a cabinet 100, DC-side devices 200, AC-side devices 300, power devices 400, a reactor 500, and several wiring components 600, wherein the wiring components 600 are located in... Figure 2 Chinese identifier.

[0037] Reference Figure 2 The cabinet 100 contains a first mounting area 101 and a second mounting area 102 arranged along the X-axis. It should be understood that the first mounting area 101 and the second mounting area 102 here are only divisions of the internal space of the cabinet 100, and do not indicate that there is a clear compartmentalization in the physical structure. Of course, in this embodiment, corresponding partitioning components can be used to construct physical compartments that are separated from each other.

[0038] Specifically, refer to Figure 1 In this embodiment, the cabinet 100 includes an outer shell 110, a first partition component 121, a second partition component 122, and an air intake component 140.

[0039] The outer shell 110 of the cabinet 100 may include a frame, a sealing plate, and doors. The frame may be formed by multiple columns and crossbars that are locked together. The frame is generally rectangular or cubic in shape. The interior of the columns may also be equipped with crossbars or other components to serve as the mounting base for certain electrical equipment, such as a reactor 500, to effectively support its weight. The sealing plate is secured to the frame with bolts or similar fasteners, forming a relatively enclosed compartment structure within the cabinet 100. Multiple doors may be provided, for example, on both sides of the X-axis. In this embodiment, the two sides of the X-axis can be considered the front and rear sides of the converter. The doors are connected to the columns of the frame via hinges and can be locked to the frame via a door lock structure, thereby isolating the internal compartments of the cabinet 100 from the external environment.

[0040] Reference Figure 1The first partition component 121 and the second partition component 122 can specifically be plate-shaped partitions. The first partition component 121 is located above the boundary line between the first mounting area 101 and the second mounting area 102, dividing the upper portion of the first mounting area 101 and the second mounting area 102 into two spatially non-interconnected areas. The second partition component 122 is located at the midpoint of the second mounting area 102 along the Z-axis and extends horizontally along the X and Y directions, dividing the upper and lower portions of the second mounting area 102 into two spatially non-interconnected areas. Thus, the internal space of the cabinet 100 is roughly divided into two spatially non-interconnected compartments, with one larger compartment located in… Figure 2 The side view shown includes the lower portion of the first mounting area 101 and the second mounting area 102. This compartment can be defined as an internal circulation compartment, which has a high protection level and can achieve internal circulation heat dissipation through the heat exchange components equipped on the converter equipment; another smaller compartment is... Figure 2 The side view shown includes the upper part of the second mounting area 102, which is a reactor housing 130 specifically designed to house the reactor 500 in order to reduce the impact of heat dissipation from the reactor 500.

[0041] Among them, reference Figure 1 The cabinet 100 has a first air inlet 131 and a first air outlet 132 in the reactor housing compartment 130. The first air inlet 131 is located at the bottom of the reactor housing compartment 130, and the first air outlet 132 is located on the side of the reactor housing compartment 130, which is the rear side panel or rear side door panel in this embodiment. Of course, in other embodiments, the first air outlet 132 can also be located at the top of the reactor housing compartment 130, for example, the top panel can have the first air outlet 132 extending through it. The shape of the first air outlet 132 can be circular, square, etc., and a single large first air outlet 132 or multiple small first air outlets 132 can be provided.

[0042] The air intake assembly 140 is located inside the outer casing 110, and approximately at the center of the cabinet 100 along the X-axis, as shown in the reference. Figure 2 The air intake assembly 140 is basically located within the second mounting area 102, but one side of it in the X-axis direction is flush with the boundary line between the first mounting area 101 and the second mounting area 102. The air intake assembly 140 forms an air intake channel 141 extending along the Z-axis direction and intakes air from the bottom of the cabinet 100. The upper end of the air intake assembly 140 forms the aforementioned first air inlet 131. Specifically, refer to... Figure 1 and Figure 5The air intake assembly 140 includes two air intake ducts 142 and one air diffuser 144. The two air intake ducts 142 extend along the Z-axis and are spaced apart along the Y-axis, creating a clearance space 150 between them. The lower end of each air intake duct 142 forms a second air inlet 143 at the bottom of the cabinet 100. When the cabinet 100 is situated on the ground, the lower end of the air intake duct 142 can draw in and deliver cooler air from a position close to the ground. The upper end of each air intake duct 142 connects to the lower end of the air diffuser 144, and the upper end of the air diffuser 144 forms the aforementioned first air inlet 131, which directly communicates with the reactor housing chamber 130. The air expansion duct 144 extends along the Y-axis, and its lower end forms two connection ports that respectively connect to the upper ends of the two air inlet ducts 142. From these two connection ports upwards, the air expansion duct 144 has an upwardly and outwardly sloping air guide surface, formed by the inner surface of the outwardly sloping duct wall of the air expansion duct 144. In this embodiment, two interconnected air guide surfaces are provided corresponding to each air inlet duct 142. One of these air guide surfaces can extend obliquely from bottom to top and from front to back, while the other can extend obliquely from one end of the Y-axis towards the other from bottom to top.

[0043] The main electrical components and electrical connections in the converter equipment will be described below.

[0044] The main electrical components in this converter include DC-side devices 200, AC-side devices 300, power devices 400, and reactors 500. Electrical connections are mainly achieved through wiring components 600. Among them, DC-side device 200 is mainly a DC switch, AC-side device 300 is mainly an AC switch, power device 400 mainly includes capacitors and power transistors, and reactor 500 is an inductor.

[0045] In this embodiment, the DC-side device 200 is located below the first mounting area 101, and the power device 400 is located above the first mounting area 101, that is, above the DC-side device 200. The AC-side device 300 is located below the second mounting area 102, and the reactor 500 is located above the second mounting area 102, that is, above the AC-side device 300. Based on the above-described cabinet 100 structure, the reactor 500 is located in the reactor housing chamber 130, and the DC-side device 200, power device 400, and AC-side device 300 are located in the internal circulation chamber. Furthermore, the first air inlet 131 of the air inlet assembly 140 in the cabinet 100 is located below the reactor 500, and the first air outlet 132 is not lower than the reactor 500 in the Z-axis direction, so that external air enters the reactor housing chamber 130, carries away the heat from the reactor 500, and is then discharged from the first air outlet 132. The phrase "the first air outlet 132 is not lower than the reactor 500" means that the upper end of the first air outlet 132 is at least flush with the winding portion of the reactor 500.

[0046] Reference Figure 2 and Figure 3 The wiring structure of the main electrical components in the converter equipment will be described below. In this embodiment, the DC-side device 200, power device 400, reactor 500 and AC-side device 300 are connected in a forward sequence. That is, the DC-side device 200 is connected upward to the power device 400, the power device 400 is connected backward to the reactor 500, and the reactor 500 is connected downward to the AC-side device 300. The overall electrical connection layout is roughly inverted U-shape.

[0047] The reactor 500 is provided with a first terminal 511 and a second terminal 512. The first terminal 511 is located on the upper side of the reactor 500, facing the first mounting area 101. The second terminal 512 is located on the lower side of the reactor 500, away from the first mounting area 101. Further, the first terminal 511 may have a portion extending towards the side of the first mounting area 101, and the second terminal 512 may have a portion extending towards the location of the AC side device 300.

[0048] The AC-side device 300 is provided with a third terminal 311 and a fourth terminal 312. The third terminal 311 is located on the upper side of the AC-side device 300, and the fourth terminal 312 is located on the lower side of the AC-side device 300. Both the third terminal 311 and the fourth terminal 312 are located on the same side of the AC-side device 300, which in this embodiment is the side away from the first mounting area 101, that is, the side facing the rear of the cabinet 100. The fourth terminal 312 is connected to the AC external connection bar 330 for external wiring, that is, for electrical connection with an external transformer.

[0049] The DC-side device 200 has a fifth terminal 211 and a sixth terminal 212. The fifth terminal 211 is located on the upper side of the DC-side device 200, and the sixth terminal 212 is located on the lower side of the DC-side device 200. The sixth terminal 212 connects to the DC external busbar 220 for external wiring, i.e., for electrical connection to external energy storage devices. Both the DC external busbar 220 and the AC external busbar 330 are copper busbars.

[0050] The power device 400 is provided with a seventh terminal 411 and an eighth terminal 412. The seventh terminal 411 is located on the upper side of the power device 400, and the eighth terminal 412 is located on the lower side of the power device 400.

[0051] In this embodiment, the wiring component 600 includes a DC terminal block 610, a power terminal block 620, and a reactance terminal block 630. The DC terminal block 610 connects the fifth terminal 211 and the eighth terminal 412, the power terminal block 620 connects the seventh terminal 411 and the first terminal 511, and the reactance terminal block 630 connects the second terminal 512 and the third terminal 311. Furthermore, based on the arrangement of each electrical component, the DC terminal block 610 has a portion extending vertically, the power terminal block 620 has a portion extending horizontally, and the reactance terminal block 630 has a portion extending vertically. The first terminal 511 or the power terminal block 620 can pass through the first partition assembly 121 horizontally, and the second terminal 512, the reactance terminal block 630, or the third terminal 311 can pass through the second partition assembly 122 vertically. When the wiring structure passes through the partition assembly, a seal can be formed at the penetration point using a sealing element or the like.

[0052] Furthermore, in the converter equipment involved in this embodiment, the AC side device 300 also has an operation panel 320, on which switches or the like can be installed to operate the AC side device 300 on and off. The operation panel 320 is located on the side of the AC side device 300 facing the first mounting area 101, and the position of the operation panel 320 is exactly located in the clearance space 150 between the two air inlets 142, so that the operation panel 320 can be exposed from the second mounting area 102. When operating, maintenance personnel can open the door panel from the front, pass through the first mounting area 101, and reach the operation panel 320. Also, referring to... Figure 4 The DC-side device 200 also avoids the operation panel 320 on the AC-side device 300 in the X-axis direction. In this embodiment, the DC-side device 200 includes two DC switches, which are arranged along the Y-axis. The interval between the two switches corresponds exactly to the operation panel 320 on the AC-side device 300. Maintenance personnel can pass through the DC-side device 200 to operate the operation panel 320.

[0053] This invention relates to a converter device, including a cabinet 100, DC-side devices 200, AC-side devices 300, power devices 400, reactors 500, and a plurality of wiring components 600. The cabinet 100 contains a first mounting area 101 and a second mounting area 102 arranged horizontally in a first direction. The DC-side devices 200 and 400 are vertically arranged from bottom to top in the first mounting area 101. The AC-side devices 300 and 500 are vertically arranged from bottom to top in the second mounting area 102. The DC-side devices 200, 400, 500, and 300 are sequentially electrically connected in a forward direction through the wiring components 600. The reactor 500 has a first terminal 511 located on the upper side and a second terminal 512 located on the lower side. The first terminal 511 faces the side where the first mounting area 101 is located and is connected to the power device 400 through a corresponding wiring component 600. The second terminal 512 faces away from the side where the first mounting area 101 is located. The AC side device 300 has a third terminal 311 located on the upper side and a fourth terminal 312 located on the lower side. Both the third terminal 311 and the fourth terminal 312 face away from the side where the first mounting area 101 is located. The third terminal 311 and the second terminal 512 are connected through a corresponding wiring component 600. The fourth terminal 312 is suitable for external wiring.

[0054] By setting up a first installation area 101 and a second installation area 102 arranged along a horizontal first direction within the cabinet 100, the original three-zone horizontal layout is changed. DC-side devices 200 and power devices 400 are arranged vertically from bottom to top in the first installation area 101, while AC-side devices 300 and reactors 500 are arranged vertically from bottom to top in the second installation area 102. This layout ensures that the spatial position of each device is consistent with the order of electrical connections. In the first installation area 101, the DC-side device 200 is directly connected upwards to the power device 400 after being connected from the bottom. In the second installation area 102, the converted electrical energy is directly connected downwards from the reactor 500 at the top to the AC-side device 300 at the bottom. The wiring component 600 achieves electrical connection through direct vertical connection and a single horizontal connection, resulting in a smooth wiring path and avoiding cross-zone loops and intersections. Maintenance personnel can directly maintain the reactor 500 from the side of the cabinet 100, which is beneficial for the miniaturization and operation and maintenance of the converter equipment. This layout moves the reactor 500 from the center in the first direction, shortening the overall size of the cabinet 100 in that direction and making its shape closer to a square. This expands the horizontal ground support span of the cabinet 100, compensating for the impact of the upward shift in the center of gravity. Raising the reactor 500 increases the space under the cabinet 100, providing ample room for the AC-side components 300. It also brings the fourth terminal 312 on the lower side of the AC side closer to the bottom of the cabinet 100, facilitating on-site construction of energy storage stations and ensuring smooth external wiring. Positioning the two terminals of the reactor 500 on opposite sides allows power components to be directly connected to the reactor 500 over a short distance, and the AC-side components 300 can also be directly connected to the reactor 500 over a short distance, reducing the bending and winding of the wiring components 600 and the length of the wiring. Having the terminals on the same side facilitates maintenance of both the reactor 500 and the AC-side components 300.

[0055] In at least one embodiment, the AC side device 300 has an operation panel 320 for operating the AC side device 300, the operation panel 320 being located on the side of the AC side device 300 facing the first mounting area 101 and exposed from the second mounting area 102.

[0056] The operation panel 320 of the AC-side device 300 is positioned and exposed on the side facing the first mounting area 101. This avoids the operation panel 320 encroaching on the space on the side of the AC-side device 300 where the wiring terminals are located, thus reducing the size and footprint of the AC-side device 300 and facilitating the connection of the wiring component 600 to the reactor 500. The operation panel 320 being exposed in the first mounting area 101 allows maintenance personnel to operate the AC-side device 300 from within the space of the first mounting area 101. During maintenance, both the DC-side device 200 and the AC-side device 300 can be maintained simultaneously, improving the convenience of maintenance.

[0057] In at least one embodiment, the DC-side device 200 avoids at least the operation panel 320 on the AC-side device 300 in a first direction.

[0058] The DC-side device 200 avoids the operation panel 320 of the AC-side device 300 in the first direction, so as to prevent the DC-side device 200 from blocking the operation panel 320 of the AC-side device 300 and ensure the maintainability of the AC-side device 300.

[0059] In at least one embodiment, a DC external connector 220 and an AC external connector 330 are also included for external wiring. The DC external connector 220 is connected to the DC-side device 200. The AC external connector 330 is connected to the fourth terminal 312. The wiring component 600 includes a DC connector 610, a power connector 620, and a reactor connector 630. At least a portion of the DC connector 610 extends vertically to connect the DC-side device 200 and the power device 400. At least a portion of the power connector 620 extends in a first direction to connect the power device 400 and the reactor 500. At least a portion of the reactor connector 630 extends vertically to connect the reactor 500 and the AC-side device 300.

[0060] The wiring component 600 includes a DC terminal block 610 and a reactor terminal block 630 extending in the vertical direction, which work together with a power terminal block 620 extending in the first direction to ensure that the routing of the terminal blocks is consistent with the layout of the devices, thereby avoiding multiple bends and crossings of the terminal blocks, reducing the length of the terminal blocks and heat loss, and reducing assembly difficulty.

[0061] In at least one embodiment, the cabinet 100 includes an outer shell 110 and a first partition assembly 121 and a second partition assembly 122 located within the outer shell 110. The first partition assembly 121 is disposed between the power device 400 and the reactor 500, and the second partition assembly 122 is disposed between the reactor 500 and the AC side device 300, so as to cooperate with the outer shell 110 to form a reactor housing chamber 130 for accommodating the reactor 500. The cabinet 100 has a first air inlet 131 and a first air outlet 132 in the reactor housing chamber 130 for heat dissipation of the reactor 500.

[0062] The reactor 500 is isolated and installed in the reactor housing compartment 130 in the cabinet 100, which isolates the reactor 500 from other devices. This is beneficial for setting the protection level of other devices and allows for the installation of independent heat dissipation systems, preventing the high-heat reactor 500 from affecting the heat dissipation of other devices.

[0063] In at least one embodiment, the first air inlet 131 is located below the reactor 500. The first air outlet 132 is located on the side and / or top of the cabinet 100, and is at least not lower than the reactor 500 in the vertical direction.

[0064] The first air inlet 131 located below the reactor 500 sends external cold air into the reactor housing chamber 130. After passing through the reactor 500, the cold air carries away the heat and is discharged from the first air outlet 132 located above. The airflow path is smooth, reducing the stagnation and circling of airflow inside the chamber and improving heat dissipation efficiency.

[0065] In at least one embodiment, the cabinet 100 further includes an air intake assembly 140 located within the housing 110. The air intake assembly 140 has an air intake channel 141 extending in a vertical direction and intakes air from the bottom of the cabinet 100, with a first air inlet 131 formed at its upper end.

[0066] An air intake assembly 140 with an air intake channel 141 is provided, which draws air from the bottom of the cabinet 100. This improves the problem of high air temperature caused by the high position of the reactor housing 130, thus ensuring the heat dissipation effect of the reactor 500.

[0067] In at least one embodiment, the air intake assembly 140 is disposed at the middle of the cabinet 100 along a first direction and includes two air intake ducts 142 arranged along a horizontal second direction. The lower end of the air intake ducts 142 forms a second air inlet 143 at the bottom of the cabinet 100. The AC side device 300 has at least its operation panel 320 located between the two air intake ducts 142.

[0068] The air intake assembly 140 is positioned in the middle of the cabinet 100 in the first direction, utilizing the space left after the DC-side devices 200 and AC-side devices 300 are installed, thus avoiding an increase in the size of the cabinet 100 and contributing to the overall miniaturization of the cabinet 100. Two air intake ducts 142 utilize the space left on both sides of the DC-side devices 200 and AC-side devices 300 in the second direction, increasing the airflow into the reactor housing 130 and enhancing the heat dissipation efficiency of the reactor 500. This structure improves the balance of airflow within the reactor housing 130 at various locations, preventing uneven heat dissipation from the reactor 500. The space between the two air intake ducts 142 provides space for the AC-side operation panel 320 to be arranged and exposed, improving the compactness of the internal device layout.

[0069] In at least one embodiment, the air intake assembly 140 further includes an air expansion duct 144 extending along a second direction. The upper end of the air expansion duct 144 forms a first air inlet 131, and its lower end is connected to the upper end of the two air intake ducts 142. It is provided with an upward and outwardly extending guide surface.

[0070] The air guide surface on the air diffuser 144 diffuses the air introduced by the two spaced air inlets 142 to the entire reactor housing chamber 130, reducing airflow collision within the chamber and improving the overall heat dissipation efficiency and heat dissipation uniformity of the reactor 500.

[0071] The present invention also relates to an energy storage system, which includes an energy storage device, a transformer, and the aforementioned converter device, wherein the DC side of the converter device is connected to the energy storage device and the AC side is connected to the transformer.

[0072] The energy storage system includes the aforementioned converter equipment. Because the internal component layout and wiring of the converter equipment are conducive to the miniaturization and operation and maintenance of the converter equipment, the energy storage system is compact and easy to operate and maintain.

[0073] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. A converter device, characterized in that, It includes a cabinet (100), DC-side devices (200), AC-side devices (300), power devices (400), reactors (500), and several wiring components (600); The cabinet (100) forms a first installation area (101) and a second installation area (102) arranged in a first horizontal direction; The DC-side devices (200) and power devices (400) are arranged vertically from bottom to top in the first mounting area (101); the AC-side devices (300) and reactors (500) are arranged vertically from bottom to top in the second mounting area (102); the DC-side devices (200), power devices (400), reactors (500) and AC-side devices (300) are electrically connected sequentially in the forward direction through each of the wiring components (600); The reactor (500) has a first terminal (511) on the upper side and a second terminal (512) on the lower side, with the first terminal (511) facing the side where the first mounting area (101) is located to be connected to the power device (400) through the corresponding wiring component (600), and the second terminal (512) facing away from the side where the first mounting area (101) is located. The AC side device (300) has a third terminal (311) on the upper side and a fourth terminal (312) on the lower side, and both the third terminal (311) and the fourth terminal (312) are located away from the side where the first mounting area (101) is located; the third terminal (311) and the second terminal (512) are connected through the corresponding wiring component (600); the fourth terminal (312) is suitable for external wiring.

2. The converter device as described in claim 1, characterized in that, The AC side device (300) has an operation panel (320) for operating the AC side device (300), the operation panel (320) being located on the side of the AC side device (300) facing the first mounting area (101) and exposed from the second mounting area (102).

3. The converter device as described in claim 2, characterized in that, The DC-side device (200) avoids at least the operation panel (320) on the AC-side device (300) in a first direction.

4. A converter device as described in claim 1, characterized in that, It also includes a DC external connector (220) and an AC external connector (330) for external wiring; the DC external connector (220) is connected to the DC-side device (200); the AC external connector (330) is connected to the fourth terminal (312); the wiring component (600) includes a DC connector (610), a power connector (620), and a reactor connector (630); at least a portion of the DC connector (610) extends vertically to connect the DC-side device (200) and the power device (400); at least a portion of the power connector (620) extends vertically to connect the power device (400) and the reactor (500); at least a portion of the reactor connector (630) extends vertically to connect the reactor (500) and the AC-side device (300).

5. A converter device as described in any one of claims 2-4, characterized in that, The cabinet (100) includes an outer shell (110) and a first partition component (121) and a second partition component (122) located within the outer shell (110); the first partition component (121) is disposed between the power device (400) and the reactor (500), and the second partition component (122) is disposed between the reactor (500) and the AC side device (300) to cooperate with the outer shell (110) to form a reactor housing chamber (130) for accommodating the reactor (500); the cabinet (100) has a first air inlet (131) and a first air outlet (132) in the reactor housing chamber (130) for dissipating heat from the reactor (500).

6. A converter device as described in claim 5, characterized in that, The first air inlet (131) is located below the reactor (500); the first air outlet (132) is located on the side and / or top of the cabinet (100), and is at least not lower than the reactor (500) in the vertical direction.

7. A converter device as described in claim 6, characterized in that, The cabinet (100) also includes an air intake assembly (140) located within the outer shell (110); the air intake assembly (140) has an air intake channel (141) extending in the vertical direction and intakes air from the bottom of the cabinet (100), and its upper end forms the first air inlet (131).

8. A converter device as described in claim 7, characterized in that, The air intake assembly (140) is located in the middle of the cabinet (100) along a first direction and includes two air intake ducts (142) arranged along a horizontal second direction. The lower end of the air intake duct (142) forms a second air inlet (143) at the bottom of the cabinet (100). The AC side device (300) has at least its operation panel (320) located between the two air intake ducts (142).

9. A converter device as described in claim 8, characterized in that, The air intake assembly (140) also includes an air expansion duct (144) extending along a second direction. The upper end of the air expansion duct (144) forms the first air inlet (131), and its lower end is connected to the upper ends of the two air intake ducts (142). It is provided with an upward and outwardly extending air guide surface.

10. An energy storage system comprising an energy storage device and a transformer, characterized in that, It also includes a converter device as described in any one of claims 1-9, wherein the DC side of the converter device is connected to the energy storage device and the AC side is connected to the transformer.

Images