A power conversion device, energy storage system
By optimizing the layout of converter devices and the design of air guide components, the problems of complex wiring and insufficient heat dissipation caused by the device layout in energy storage converter devices have been solved, achieving compactness and efficient heat dissipation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAMEN KEHUA DIGITAL ENERGY TECH CO LTD
- Filing Date
- 2026-06-03
- Publication Date
- 2026-07-21
AI Technical Summary
The existing energy storage converter device layout results in convoluted and intertwined internal wiring paths, affecting the overall compactness and operation and maintenance, increasing power transmission losses, and making it inconvenient to test and replace reactor devices.
Power devices and DC devices are arranged vertically at the front of the cabinet, while reactor devices and AC devices are arranged vertically at the rear. Airflow distribution is optimized through air guide components to form an open cold air delivery channel, thereby improving heat dissipation efficiency.
This achieves compactness and good heat dissipation in converter equipment, reduces power transmission losses, and simplifies the testing and maintenance process of devices.
Smart Images
Figure CN122437345A_ABST
Abstract
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 prior art and to provide a converter device and an energy storage system. The converter device, through the improvement of the device layout, is conducive to the compactness of the whole machine and operation and maintenance, and further improves the heat dissipation of DC devices and power devices under the layout.
[0004] The applicant discovered that traditional converter equipment typically arranges DC-side devices, reactors, and AC-side devices in horizontal sections. Due to their significant weight, reactors are often fixed in the middle of the cabinet bottom to lower the overall center of gravity and improve tilt resistance. While this layout is beneficial for overall stability, it causes the wiring paths from the DC side to the power devices, and from the reactors to the AC-side devices, to cross vertically and laterally, increasing the length of the terminal blocks and consequently raising power transmission losses and assembly / maintenance complexity. Furthermore, reactors located in the middle of the cabinet are easily obstructed by adjacent devices or compartments, making routine inspection and replacement from the outside of the cabinet inconvenient.
[0005] To address the problems with the traditional device layout of converter equipment, the applicant adjusted the device layout as follows: power devices and DC devices are located at the front of the cabinet and arranged vertically, while reactor devices and AC devices are located at the rear of the cabinet and arranged vertically, moving the reactor devices from the traditional bottom-middle position upwards. However, the applicant found that with the power devices and DC devices arranged vertically at the front of the cabinet, if the circulating airflow from the first air outlet is mainly directed to the lower part of the cabinet, although this is beneficial for supplementing airflow to areas far from the top, there may be localized insufficient airflow around the power devices and DC devices.
[0006] To achieve the above objectives, the following technical solution is adopted: In at least one embodiment, a converter device is disclosed, comprising: a cabinet having a first compartment and a second compartment isolated from each other; the top of the first compartment having a first air outlet and a return air outlet arranged from front to back for forming a circulating airflow in the first compartment; a converter assembly including a DC device, a power device, a reactor device, and an AC device connected in sequence; the DC device, the power device, and the AC device are located in the first compartment, and the reactor device is located in the second compartment; the power device and the DC device are arranged from top to bottom and located at the front of the cabinet, and the reactor device and the AC device are arranged from top to bottom and located at the front of the cabinet. The rear part; and an air guide assembly, which includes a first air guide; the first air guide is disposed in the first compartment and cooperates with the inner wall of the front side of the cabinet to form an air supply duct that extends vertically and is located at the front of the cabinet; the upper end of the first air guide forms a receiving part, the receiving part being adapted to receive the airflow sent from the first air outlet, and to guide part of the airflow to the air supply duct, part to at least a portion of the DC device located behind the first air guide, and part to impact and be deflected back to the power device located above the first air guide; the air supply duct is used to send the received airflow to the lower region of the first compartment.
[0007] In the above design, the first air guide component cooperates with the inner wall of the front side of the cabinet to form a downward-extending air supply duct, and at its upper end, a receiving section is formed to receive the airflow from the first air outlet. After the airflow from the first air outlet reaches the receiving section, part of it is guided into the air supply duct and flows downward along the front of the cabinet, part is directed to the DC devices behind the first air guide component, and the remaining part is deflected and enters the area where the power devices are located at the receiving section. Thus, the top air outlet not only allows some airflow to be guided to the lower part of the cabinet for air cooling of the devices in the lower part of the cabinet, but also distributes it to the power devices and DC devices before entering the air supply duct of the cabinet, so that the devices in the upper and lower parts of the first compartment can receive sufficient air cooling flow. Among them, the power devices and DC devices are both located at the front of the cabinet and are arranged adjacent to each other in the height direction. After the receiving section guides the airflow to the power devices and DC devices respectively, the upper and middle heat sources at the front of the first compartment can receive relatively direct cold air supply. Meanwhile, the air supply duct retains its downward airflow function, allowing the remaining distributed airflow to continue reaching the lower area of the first compartment. This creates an open cold air delivery channel in the areas containing power devices and DC devices, utilizing the air receiving section on the first air guide to distribute airflow among the three different areas. This reduces the likelihood of insufficient heat dissipation for upper devices due to a single downward air supply path, thus enabling the power devices to achieve better temperature rise control even with increased power, in addition to their existing liquid cooling and other primary heat dissipation methods.
[0008] In the power converter disclosed in at least one embodiment, preferably, the switching module of the power device is mounted on at least one side of the vertically arranged mounting base in the front-back direction, and the power device is provided with a capacitor module at least on the opposite side; a switch heat dissipation duct is formed between the mounting base and the capacitor module; the air receiving part is adapted to send the airflow impacted and deflected to the power device located above the first air guide to the lower end of the switch heat dissipation duct.
[0009] In the above design, the switching module and capacitor module are separated by a mounting base, forming a cooling airflow channel for the switch. The airflow deflected from the receiving section is sent to the lower end of the cooling airflow channel, where it continues to flow along the gap between the mounting base and the capacitor module, thus providing air-cooled heat exchange for the switching module located near the mounting base. Since the cooling airflow channel is formed by the mounting gap of the power device itself, this structure helps to convert a portion of the top-outflow airflow into a localized cooling airflow for the switching module, improving the targeted heat dissipation efficiency for the switching module within the power device.
[0010] In the converter device disclosed in at least one embodiment, preferably, the switch heat dissipation duct is provided on both the front and rear sides of the mounting base, and forms a first power duct and a second power duct respectively; at least the second power duct is adapted to guide the passing airflow to the return air inlet.
[0011] In the above design, when heat dissipation ducts are formed on both the front and rear sides of the mounting base, the airflow can flow around the switch modules and capacitor modules on both sides of the mounting base. The second power duct further serves to guide the heat-exchanged airflow to the return air vent, enabling the heat dissipation airflow in the power device area to form a better circulation loop and be sent back to the return air vent. In this way, on the one hand, it helps to improve the uniformity of heat dissipation on the front and rear sides of the power device, and on the other hand, it also reduces the possibility of heat-exchanged airflow stagnating near the power device.
[0012] In the converter device disclosed in at least one embodiment, preferably, the air guiding assembly further includes a second air guiding element, which is inclinedly disposed at the first air outlet to guide the airflow sent out from the first air outlet to the front of the cabinet.
[0013] In the above design, the second air guide component pre-changes the airflow direction at the first air outlet, making it easier for the airflow to reach the air receiving section at the front of the cabinet. Since the return air outlet is located behind the first air outlet, the inclined setting of the second air guide component can reduce the tendency for the airflow to short-circuit directly from the first air outlet to the return air outlet, and improve the stability of the airflow received by the air receiving section.
[0014] In the power converter disclosed in at least one embodiment, preferably, the second air guide is provided with a through-hole; the first power duct is adapted to receive the airflow sent from the vent, and the second power duct is adapted to guide the airflow passing through the first power duct to the return air vent.
[0015] In the above design, the second air guide directs the airflow to the front of the cabinet while simultaneously allowing a portion of the airflow to directly enter the first power air duct through the vent. After passing through the first power air duct, this portion of the airflow can be further guided to the second power air duct and flow towards the return air vent. Thus, the power device area, in addition to receiving the airflow deflected from the receiving section, can also receive supplementary airflow from the vent, further improving the heat dissipation efficiency for the switching module.
[0016] In the converter device disclosed in at least one embodiment, preferably, the switch module is installed on the front and rear sides of the mounting base, and the mounting base is provided with a clearance opening in the front-rear direction, the clearance opening being adapted to guide the airflow in the first power duct to the second power duct.
[0017] In the above design, when the switching modules are located on the front and rear sides of the mounting base, the cold air supplied by the vents to the first power air duct can first sweep the switching modules and capacitor modules on one side of the mounting base. After the clearance opening passes through the mounting base, the airflow in the first power air duct can pass through the mounting base and enter the second power air duct, continuing to exchange heat with the switching modules and adjacent capacitor modules on the other side of the mounting base. In this way, the obstruction of the airflow by the mounting base can be reduced, and the heat exchange path spanning the front and rear sides is formed by the clearance opening, which is beneficial to improving the heat dissipation uniformity of the power devices on both sides.
[0018] In the converter device disclosed in at least one embodiment, preferably, the power device cooperates with the outer wall of the second compartment, and the DC device and the AC device cooperate to form a return air channel located in the middle of the front-rear direction of the cabinet; the airflow guided by the air receiving part to the DC device located behind the first air guide is guided to the return air outlet through the return air channel after passing at least part of the DC device.
[0019] In the above design, the return air duct is located in the middle of the cabinet in the front-to-back direction, providing a return path for the airflow after heat exchange near the DC devices. The airflow guided by the air intake to the DC devices can return to the return air vent via the return air duct after passing the DC devices. In this way, the DC devices can receive the cool air distributed from the first air outlet, and the airflow after heat exchange can also be organized back to the top return air position, which helps to maintain the stability of the direction of the circulating airflow in the first compartment.
[0020] In the converter device disclosed in at least one embodiment, preferably, the first air guide includes a functional device housing disposed in the first compartment; the functional device housing is spaced apart from the inner wall of the front side of the cabinet to form the air supply duct, and the upper end of the functional device housing and / or the side facing the interior of the first compartment forms the air receiving part.
[0021] In the above design, the first air guide can be constructed from the existing housing of the functional components within the first compartment, allowing the housing to simultaneously serve as both installation protection and air guide. The gap between the functional component housing and the inner front wall of the cabinet forms an air supply duct. After the upper end of the duct or the side facing the interior of the first compartment forms a receiving section, an open airflow distribution structure can be created without the need for additional large-area enclosed panels. This facilitates the use of the existing space at the front of the cabinet for airflow distribution and reduces the impact of the air guide structure on the arrangement of components within the first compartment.
[0022] In the converter device disclosed in at least one embodiment, preferably, a baffle plate is further included; the power device and the reactor device are connected by a power terminal block located on the upper side of the power device, and the baffle plate is disposed in the front-back direction between the first air outlet and the return air outlet and above the power terminal block, which is adapted to block the airflow from passing over the power terminal block.
[0023] In the above design, with the power terminal block located above the power devices and both the first air outlet and return air outlet located at the top of the cabinet, a near-end path easily forms above the power terminal block, leading from the air outlet side to the return air side. By placing a baffle plate between the first air outlet and the return air outlet and covering the power terminal block, the airflow can be prevented from passing directly above the power terminal block. This directs the airflow from the first air outlet more towards the receiving section, the switch cooling duct, or the area where DC devices are located, thus improving the effective utilization rate of the top-mounted air outlet.
[0024] In at least one embodiment, an energy storage system is disclosed, which includes an energy storage device, a transformer, and a converter device as described in any of the above embodiments, wherein the DC side of the converter device is connected to the energy storage device and the AC side is connected to the transformer.
[0025] After adopting the aforementioned converter equipment, the converter equipment can distribute and organize the circulating airflow in the first compartment under the condition that the power devices and DC devices are arranged vertically at the front of the cabinet, thereby improving the heat dissipation stability of the converter equipment in the energy storage system. Attached Figure Description
[0026] 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.
[0027] 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 1A side view of the medium-voltage converter along the Y-axis. Figure 3 for Figure 1 A schematic diagram of the first airflow path inside the medium-voltage converter.
[0028] Explanation of key figure labels: Cabinet body 100; outer shell 110; first compartment 120; first air outlet 121; return air outlet 122; second compartment 130; second air outlet 131; air inlet duct 140; air inlet duct 141; air outlet duct 142; DC device 200; fifth terminal 211; sixth terminal 212; DC external connector 220; AC device 300; third terminal 311; fourth terminal 312; operation panel 320; AC external connector 330; first heating element 340; Power device 400; seventh terminal 411; eighth terminal 412; mounting base 420; clearance port 421; Reactor 500; First terminal 511; Second terminal 512; DC terminal block 610; Power terminal block 620; Reactor terminal block 630; First air guide component 710; air receiving part 711; second air guide component 720; vent 721; fan air collector component 730; air collecting chamber 731; wind baffle 740; first fan 750; Supply air duct 810; first power air duct 820; second power air duct 830; return air duct 840. Detailed Implementation
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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."
[0034] 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.
[0035] 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.
[0036] The converter equipment involved in the embodiments of the present invention will be described in detail below.
[0037] Before describing the converter, it is necessary to clearly define the various directions in this specification and claims. In this embodiment, the side of the cabinet 100 closest to the power device 400 and the DC device 200 is the front side, and the side of the cabinet 100 closest to the reactor device 500 and the AC device 300 is the rear side; the left-right direction is the horizontal direction that intersects with both the front-back and up-down directions. The above directions are only used to illustrate the relative positional relationships between the components and do not limit the converter to a specific installation posture during actual use. In the accompanying drawings, the X-axis is the front-back direction, the Y-axis is the left-right direction, and the Z-axis is the up-down direction.
[0038] Reference Figure 1 The converter mainly includes a cabinet 100, a converter assembly, and an air guide assembly. The converter assembly includes DC devices 200 and power devices 400, as well as reactor devices 500 and AC devices 300. These devices are electrically connected sequentially in a forward direction. The air guide assembly is used to organize airflow within the cabinet 100, so that the DC devices 200, power devices 400, and AC devices 300 in the first compartment 120 receive cooling airflow, and that the second compartment 130, where the reactor device 500 is located, can dissipate heat in an isolated manner from the first compartment 120.
[0039] Reference Figure 1 and Figure 2 The cabinet 100 contains two isolated compartments: a first compartment 120 and a second compartment 130. The first compartment 120 houses the DC device 200, the power device 400, and the AC device 300, and forms an internal circulation airflow through the first air outlet 121 and the return air outlet 122 at the top of the cabinet 100. The second compartment 130 houses the reactor device 500 and forms an independent external circulation heat dissipation path through air inlet and outlet structures connected to the outside of the cabinet 100. It should be understood that the first compartment 120 and the second compartment 130 divide the internal space of the cabinet 100. They can be formed into isolated compartments by physical partitions or by the compartment walls, partitions, and device mounting structures within the cabinet 100. The first compartment 120 is a highly protected compartment isolated from the outside. The power device 400 contains switching modules (e.g., IGBT modules), capacitors, and other electrical components sensitive to dust and rain. Therefore, as a highly protected compartment, the first compartment 120 has an internal circulation airflow for heat dissipation. This embodiment reduces the overall temperature rise of the first compartment 120 and the temperature rise of each electrical component in the first compartment 120 by forming an organized internal circulation airflow.
[0040] Specifically, the cabinet 100 in this embodiment may include an outer shell 110, a partition assembly, and an air intake assembly for the second compartment 130. The outer shell 110 may include a frame, a sealing plate, and a door panel. The frame may be formed by locking uprights and beams, and the sealing plate is installed on the outside of the frame to make the cabinet 100 form a relatively enclosed compartment structure. The door panel may be located on the front or rear side of the cabinet 100 and connected to the frame by hinges so that the corresponding compartment can be opened for maintenance.
[0041] The partition assembly may include a plate-like member disposed between the first compartment 120 and the second compartment 130. This plate-like member separates the reactor device 500 from other electrical devices in the first compartment 120 and forms the outer wall of the second compartment 130. The outer wall of the second compartment 130 is located on the upper rear side of the first compartment 120, and its side facing the first compartment 120 can also serve as the boundary of the return air duct 840 or the AC-side upward airflow path within the first compartment 120.
[0042] Reference Figure 2 The top of the first compartment 120 is provided with a first air outlet 121 and a return air outlet 122 from front to back. The first air outlet 121 is used to send cooled air after heat exchange into the first compartment 120, and the return air outlet 122 is used to receive the return air after heat exchange in the first compartment 120. The first air outlet 121 and the return air outlet 122 can be used with an air-to-air heat exchanger or other heat exchange components, and an internal circulation airflow is formed inside the first compartment 120 by a second fan set at the corresponding air outlet position. Since the first air outlet 121 and the return air outlet 122 are both located at the top of the cabinet 100, the airflow is prone to near-end backflow if it is not further guided. In this embodiment, the airflow sent out by the first air outlet 121 is organized by an air guiding component.
[0043] The second compartment 130 is provided with a second air outlet 131 that communicates with the outside of the cabinet 100. The air inlet assembly of the second compartment 130 includes an air inlet duct 140. The air inlet duct 140 extends vertically, with its lower end forming an air inlet 141 at the bottom of the cabinet 100, and its upper end communicating with the second compartment 130 to form an air outlet 142. Outside air enters the air inlet duct 140 from the bottom of the cabinet 100, then enters the second compartment 130 and passes through the reactor device 500, and finally exits from the second air outlet 131. In this way, the heat generated by the reactor device 500 is carried away by the external circulation path of the second compartment 130 and does not directly enter the internal circulation airflow of the first compartment 120. Several third fans can be installed in the second compartment 130, which are used to create unidirectional airflow in the second compartment 130 and the air inlet duct 140.
[0044] In one specific embodiment, two air inlets 140 may be provided. The two air inlets 140 are arranged at intervals in the left-right direction and are respectively located on the left and right sides of the first compartment 120 in the front-rear direction of the cabinet 100. An air passage is formed between the two air inlets 140, which allows the airflow in the first compartment 120 to converge into the return air passage 840. For the area where the AC device 300 is located, the opposing sidewalls of the two air inlets 140 can also define part of the airflow boundary in the left-right direction, so that the upward airflow delivered from the first fan 750 is not easily diffused to the sides.
[0045] The following combination Figure 2 Next, the main electrical components and electrical connections in the converter equipment will be described.
[0046] The main electrical components of this converter include DC devices 200 and AC devices 300, as well as power devices 400 and reactor devices 500. Electrical connections are primarily achieved through wiring components. DC devices 200 can mainly be DC switches, but may also include DC circuit breakers and DC fuses. AC devices 300 can mainly be AC switches, but may also include AC circuit breakers, AC side connecting copper busbars, and wiring structures connecting to reactor devices 500. Power devices 400 can mainly include switch modules and mounting bases 420, and may further include capacitor modules. The mounting base 420 can be a liquid-cooled plate or other mounting structures capable of supporting the switch modules. Reactor devices 500 can be reactors.
[0047] In this embodiment, the power device 400 is located on the upper front side of the first compartment 120, and the DC device 200 is located on the lower front side of the first compartment 120, meaning the power device 400 is above the DC device 200. The AC device 300 is located on the lower rear side of the first compartment 120, and the reactor device 500 is located in the second compartment 130 and above the AC device 300. Thus, the power device 400 and the DC device 200 are arranged from top to bottom at the front of the cabinet 100, and the reactor device 500 and the AC device 300 are arranged from top to bottom at the rear of the cabinet 100. Based on the above structure of the cabinet 100, it can be seen that the reactor device 500 is located in the second compartment 130, and the DC device 200, power device 400, and AC device 300 are located in the first compartment 120.
[0048] In this embodiment, the DC device 200, power device 400, reactor device 500, and AC device 300 are connected sequentially in a forward direction. That is, the DC device 200 connects upwards to the power device 400, the power device 400 connects backwards to the reactor device 500, and the reactor device 500 connects downwards to the AC device 300, forming an overall electrical connection layout that is roughly inverted U-shaped. This layout eliminates the need to place the heavy reactor device 500 in the middle of the cabinet 100, and also eliminates the need for the wiring harness inside the cabinet 100 to repeatedly loop across zones.
[0049] Specifically, the reactor device 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 device 500 and faces the side where the power device 400 is located, so as to connect to the power device 400 through a corresponding wiring component. The second terminal 512 is located on the lower side of the reactor device 500 and faces the side where the AC device 300 is located, so as to connect to the AC device 300 through a corresponding wiring component. In this way, the two terminals of the reactor device 500 correspond to the adjacent power device 400 and AC device 300 respectively, which can reduce the routing of wiring components within the cabinet 100.
[0050] The AC 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 device 300 and is used to connect to the second terminal 512 of the reactor device 500. The fourth terminal 312 is located on the lower side of the AC device 300 and is used to connect to the AC external connector 330, which is suitable for electrical connection to an external transformer. In one specific embodiment, the AC device 300 may also have an operation panel 320, which may be arranged facing the front of the cabinet 100 or the operable area of the first compartment 120, so that maintenance personnel can operate it after opening the cabinet 100.
[0051] The DC 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 device 200 and is used to connect to the power device 400. The sixth terminal 212 is located on the lower side of the DC device 200 and is used to connect to the DC external connector 220, which is suitable for electrical connection to an external energy storage device. The power device 400 has 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 is used to connect to the reactor device 500; the eighth terminal 412 is located on the lower side of the power device 400 and is used to connect to the DC device 200.
[0052] The wiring components in this embodiment may include a DC terminal block 610, a power terminal block 620, and a reactor terminal block 630. The DC terminal block 610 connects the fifth terminal 211 of the DC device 200 and the eighth terminal 412 of the power device 400, and has a portion extending in the vertical direction. The power terminal block 620 connects the seventh terminal 411 of the power device 400 and the first terminal 511 of the reactor device 500, and has a portion extending in the front-back direction. The reactor terminal block 630 connects the second terminal 512 of the reactor device 500 and the third terminal 311 of the AC device 300, and has a portion extending in the vertical direction. When these terminal blocks pass through the partition assembly between the first compartment 120 and the second compartment 130, they can be sealed and supported at the penetration location by a sealant, an insulator, or a support.
[0053] Through the coordination of the aforementioned terminals and terminal blocks, the DC external terminal block 220 is first connected to the power device 400 via the DC device 200 and the DC terminal block 610; the power device 400 is then connected to the reactor device 500 via the power terminal block 620; the reactor device 500 is then connected to the AC device 300 via the reactor terminal block 630, and then externally connected via the AC external terminal block 330. This forms a forward electrical connection link. This connection link is compatible with the vertical and horizontal arrangement of the devices within the cabinet 100, ensuring a smooth wiring path within the cabinet 100 while maintaining the upward placement of the reactor device 500.
[0054] Furthermore, through the aforementioned device layout and its coordination with the front wall of the second compartment 130, a vertical return air channel 840 is formed in the middle of the first compartment 120 of the cabinet 100 in the front-rear direction. This return air channel 840 is not composed of a solid duct plate, but rather is an open channel formed by the shape of the devices themselves and the shape of the internal wall of the cabinet 100. The airflow in this channel can be better influenced by the return air suction at the return air inlet 122. For details of the return air channel 840, please refer to [link / reference needed]. Figure 2 The portion shown is marked with a red arrow.
[0055] The following section will describe the air guide components and the internal circulation airflow in the first chamber 120 of the converter.
[0056] The air guiding assembly includes a first air guiding element 710. The first air guiding element 710 is disposed within the first compartment 120 and located at the front of the cabinet 100. The first air guiding element 710 is spaced apart from the inner front wall of the cabinet 100 to form an air supply duct 810 extending vertically. The upper end of the air supply duct 810 is close to the area where the first air outlet 121 is located, and the lower end extends to the lower area of the first compartment 120. The first air guiding element 710 can be a functional device housing located at the front of the first compartment 120, such as a main control box housing. When a functional device housing is used as the first air guiding element 710, the housing simultaneously serves as a device installation protection and air guiding function, eliminating the need for a separate large-area enclosed air duct component.
[0057] The upper end of the first air guide 710 forms an air receiving section 711. After the airflow from the first air outlet 121 reaches the air receiving section 711, the air receiving section 711 distributes the airflow. A portion of the airflow enters the air supply duct 810 and flows downward along the front of the cabinet 100; a portion of the airflow is guided to the DC device 200 area behind the first air guide 710; and another portion of the airflow is deflected at the air receiving section 711 and enters the power device 400 area located above or above and behind the first air guide 710. With this arrangement, the cool air delivered by the first air outlet 121 can be delivered to the lower area of the first compartment 120, and can also form supplementary heat dissipation on the upper and middle sides of the front of the cabinet 100. The specific structure of the air receiving section 711 can be the outer wall portion of the top of the main control box housing. This outer wall portion has a certain width or thickness to form a large air receiving surface. After the airflow impacts this air receiving surface, part of the airflow will be transported smoothly from the front and rear sides of the air receiving surface, thereby supplying air to the air supply duct 810 and the area where the DC device 200 is located. The other part of the airflow will impact the air receiving surface and then be deflected, thus forming an upward airflow reaching the area where the power device 400 is located. The specific airflow direction can be referred to... Figure 2 The portion shown is marked with a red arrow.
[0058] In one specific embodiment, the air guiding assembly further includes a second air guiding member 720. The second air guiding member 720 can be a plate-shaped member extending in a left-right direction. This second air guiding member 720 is inclined at the first air outlet 121 and located between the first air outlet 121 and the return air outlet 122. The second air guiding member 720 is inclined from top to bottom and from back to front to guide the airflow from the first air outlet 121 towards the front of the cabinet 100, allowing the airflow to reach the air receiving portion 711 of the first air guiding member 710 and the inlet of the air supply duct 810 more stably. Further, referring to… Figure 2The second air guide 720 can also be provided with a through-hole 721. The air vent 721 allows some airflow to enter the area where the power device 400 is located while being guided to the front of the cabinet 100. Furthermore, an inclined air guide plate can be provided on the second air guide 720 at the position corresponding to the air vent 721. This air guide plate can more accurately deliver airflow to the parts of the power device 400 that require further air cooling.
[0059] Specifically, the switching module in the power device 400 is mounted on a vertically arranged mounting base 420, and the switching module can be installed on both the front and rear sides of the mounting base 420. The capacitor module can be arranged on the front and rear sides of the mounting base 420. A first power air duct 820 is formed between the mounting base 420 and the capacitor module on its front side, and a second power air duct 830 is formed between the mounting base 420 and the capacitor module on its rear side. The first power air duct 820 and the second power air duct 830 constitute the heat dissipation air duct for the switches in the power device 400. The airflow entering the area where the power device 400 is located through the vent 721 can enter the first power air duct 820; the airflow impacted and deflected by the airflow receiving part 711 can also enter the first power air duct 820 or the corresponding gap near the power device 400. When the airflow flows in the first power air duct 820, it can perform sweeping air heat exchange on the switching module and adjacent capacitor module on one side of the mounting base 420. Afterwards, the airflow can reach the bottom of the first power air duct 820. At this time, under the suction effect at the return air vent 122, part of the airflow will rise from the bottom of the second power air duct 830 back to the top of the mounting base 420 and then enter the return air vent 122. At the same time, another part of the airflow can also reach the DC device 200 below the power device 400, dissipate heat from the DC device 200, and then return to the return air vent 122 through the return air channel 840.
[0060] In the embodiment where the switch module is installed on both the front and rear sides of the mounting base 420, the mounting base 420 may be provided with a clearance port 421 extending through in the front-to-back direction. The clearance port 421 may be located at the middle position in the vertical direction of the mounting base 420. The clearance port 421 is used to guide the airflow in the first power air duct 820 to the second power air duct 830, so that the airflow can continue to pass through the switch module and capacitor module on the other side of the mounting base 420. The second power air duct 830 is connected to the return air vent 122 or the return air channel 840, so that the airflow after passing through the area of the power device 400 can be discharged to the return air vent 122. In this way, the mounting base 420 no longer completely blocks the airflow on its front and rear sides, and the front and rear sides of the power device 400 can obtain a more balanced air-cooled auxiliary heat dissipation. More specifically, when the switch module is provided on both the front and rear sides of the mounting base 420, the switch module can pass through the clearance port 421 to make the switch modules on both sides electrically connected.
[0061] The power device 400 and the reactor device 500 are connected via a power terminal block 620. The power terminal block 620 can be located above the power device 400 and extends in the front-to-back direction to the reactor device 500 within the second compartment 130. Since the area above the power terminal block 620 is close to the top region between the first air outlet 121 and the return air outlet 122, a baffle 740 can be installed at this location in this embodiment. The baffle 740 is positioned in the front-to-back direction between the first air outlet 121 and the return air outlet 122, and is located above the power terminal block 620, to prevent airflow from flowing directly from above the power terminal block 620 to the return air outlet 122. Simultaneously, with the baffle 740 above the power terminal block 620, airflow passing through the vent 721 on the second air guide 720 can pass under the baffle 740, directly dissipating heat from the power terminal block 620, thus improving the heat dissipation efficiency of this high-heat terminal block.
[0062] The airflow in the area guided by the air intake 711 to the DC device 200 can flow through at least a portion of the DC device 200. Specifically, the airflow can pass through the DC frame, the DC fuse, or the air gap around the DC device 200, and then flow into the return air channel 840 in the middle of the front-rear direction of the cabinet 100. The upper end of the return air channel 840 is connected to the return air inlet 122, so that the airflow after passing through the DC device 200 or the power device 400 can return to the top return air position.
[0063] Reference Figure 2 The air guiding assembly also includes a first fan 750. The first fan 750 is located at the bottom of the first compartment 120, between the DC device 200 and the AC device 300. The air inlet side of the first fan 750 corresponds to the lower end of the air supply duct 810, and its air outlet side faces the area where the AC device 300 is located. After the airflow delivered downwards along the air supply duct 810 reaches the lower area of the first compartment 120, it is further guided by the first fan 750 to the area of the AC device 300 at the rear of the cabinet 100.
[0064] In one specific embodiment, a fan collector 730 is provided on the air inlet side of the first fan 750. The fan collector 730 can be an air guide duct or an extended baffle 740, or it can be an air collection structure formed by a surrounding panel. The fan collector 730 is located in front of the first fan 750 and extends a predetermined distance towards the front of the cabinet 100 to form an air collection cavity 731 communicating with the first fan 750. The air collection cavity 731 is used to centrally receive the airflow sent from the supply air duct 810 to the lower area of the first compartment 120, reducing the situation where the heat-exchanged airflow near the return air duct 840 is directly sucked in by the first fan 750.
[0065] Reference Figure 1 and Figure 3The first fan 750 occupies a portion of the space in the first compartment 120 along the left-right direction. That is, the first fan 750 does not completely enclose the left-right airflow area between the DC device 200 and the AC device 300. The first fan 750 can be offset relative to the left-right dimensions of its area, allowing a larger airflow space to be retained on one side. After the first fan 750 delivers airflow into the area where the AC device 300 is located, part of the airflow forms a generally horizontally circling first airflow path along this airflow space, while another part forms an upward-trending second airflow path behind and above the first fan 750. (Refer to...) Figure 2 The red line with an arrow, located below compartment 130 in the second section, indicates the first airflow path; additionally refer to... Figure 3 The red arrow indicates the second airflow path.
[0066] Specifically, the first airflow path can be formed by airflow impacting the rear and side inner walls of the first compartment 120 after passing through the first fan 750. A first heating element 340 can also be arranged parallel to the first fan 750 in the first compartment 120 along the left-right direction. After passing through the first heating element 340, the first airflow path connects to the return air channel 840. The first heating element 340 can be an auxiliary power transformer, an auxiliary power module, or a low-voltage power supply assembly. The first airflow path mainly covers the lower lateral space of the area where the AC device 300 is located, allowing the heat-generating object there to receive cool air directly supplied by the first fan 750.
[0067] The second airflow path can be formed by airflow impacting the rear inner wall of the first compartment 120 and the outer wall of the second compartment 130 after passing through the first fan 750. The second airflow path has an upward flow path along the area where the AC device 300 is located, and connects to the return air channel 840 after passing the second heating device in the AC device 300. The second heating device can be an AC-side connecting copper busbar, or a reactor tap or reactor connecting busbar, etc., located below the second compartment 130.
[0068] When the second chamber 130 air inlet assembly includes two air inlet ducts 140, the two air inlet ducts 140 can be located on the left and right sides of the second air passage, respectively. The air passage formed between the two air inlet ducts 140 allows the first and second air passages to connect with the return air passage 840. Since the sidewalls of the two air inlet ducts 140 are located on the left and right sides of this area, their opposing sidewalls can also play a certain role in limiting the flow of the second air passage, making the upward airflow more concentrated in the area where the second heating device is located.
[0069] Therefore, the internal circulation airflow in the first compartment 120 can be organized according to the following path: the airflow from the first air outlet 121 first reaches the air receiving part 711 of the second air guide 720 and the first air guide 710. Part of the airflow enters the area where the power device 400 is located and flows through the first power air duct 820 and the second power air duct 830; part of the airflow enters the area where the DC device 200 is located; and another part of the airflow reaches the lower area of the first compartment 120 along the air supply duct 810. The airflow reaching the lower area of the first compartment 120 is sent to the area where the AC device 300 is located by the first fan 750 and is divided into the first air path and the second air path. After heat exchange, the airflow in the first air path and the second air path merges into the return air duct 840 and then returns to the heat exchange assembly through the return air outlet 122.
[0070] In at least one embodiment, a power converter is disclosed, comprising: a cabinet 100 having a first compartment 120 and a second compartment 130 isolated from each other; the top of the first compartment 120 is provided with a first air outlet 121 and a return air outlet 122 for forming a circulating airflow in the first compartment 120, arranged from front to back; a power converter assembly including a DC device 200, a power device 400, a reactor device 500, and an AC device 300 connected in sequence; the DC device 200, the power device 400, and the AC device 300 are located in the first compartment 120, and the reactor device 500 is located in the second compartment 130; the power device 400 and the DC device 200 are arranged from top to bottom and located at the front of the cabinet 100, and the reactor device 500 and the AC device 300 are arranged from top to bottom and located at the front of the cabinet 100. The cabinet 100 is arranged from top to bottom and located at the rear of the cabinet; and the air guide assembly includes a first air guide 710; the first air guide 710 is disposed in the first compartment 120 and cooperates with the inner wall of the front side of the cabinet 100 to form an air supply duct 810 extending vertically and located at the front of the cabinet 100; the upper end of the first air guide 710 forms an air receiving part 711, which is adapted to receive the airflow sent from the first air outlet 121 and guide part of the airflow to the air supply duct 810, part of the airflow to at least a portion of the DC device 200 located behind the first air guide 710, and part of the airflow impacts and is deflected back to the power device 400 located above the first air guide 710; the air supply duct 810 is used to send the received airflow to the lower region of the first compartment 120.
[0071] In the above design, the first air guide 710 cooperates with the inner front wall of the cabinet 100 to form a downward-extending air supply duct 810, and a receiving section 711 is formed at its upper end to receive the airflow from the first air outlet 121. After the airflow from the first air outlet 121 reaches the receiving section 711, part of it is guided into the air supply duct 810 and flows downward along the front of the cabinet 100, part of it is guided to the DC device 200 behind the first air guide 710, and another part is impacted and deflected at the receiving section 711 and enters the area where the power device 400 is located. Thus, the top air outlet can not only guide part of the airflow to the lower part of the cabinet 100 to achieve air cooling for the devices in the lower part of the cabinet 100, but also distribute it to the power device 400 and the DC device 200 before entering the air supply duct 810 of the cabinet 100, so that the devices in the upper and lower parts of the first compartment 120 of the cabinet 100 can receive sufficient air cooling flow. In this configuration, both the power device 400 and the DC device 200 are located at the front of the cabinet 100, arranged adjacent to each other in the vertical direction. The air receiving section 711 directs airflow to the power device 400 and the DC device 200 respectively, ensuring that the upper and middle heat sources at the front of the first compartment 120 receive relatively direct cool air supply. Simultaneously, the air supply duct 810 retains its downward airflow function, allowing the remaining distributed airflow to continue reaching the lower area of the first compartment 120. This creates an open cool air delivery channel in the area where the power device 400 and the DC device 200 are located. The air receiving section 711 on the first air guide 710 distributes airflow to three different areas, reducing the possibility of insufficient heat dissipation for the upper devices due to a single downward airflow path. This allows the power device 400 to achieve better temperature rise control even with increased power, in addition to its existing liquid cooling and other primary heat dissipation methods.
[0072] In the converter device disclosed in at least one embodiment, preferably, the switching module in the power device 400 is mounted on at least one side of the vertically arranged mounting base 420 in the front-back direction, and the power device 400 is provided with a capacitor module at least on the corresponding side; a switch heat dissipation air duct is formed between the mounting base 420 and the capacitor module; the air receiving part 711 is adapted to send the airflow impacted and deflected to the power device 400 located above the first air guide 710 to the lower end of the switch heat dissipation air duct.
[0073] In the above design, the switch module and capacitor module are separated by the mounting base 420, forming a switch cooling airflow duct. The airflow deflected from the receiving section 711 is sent to the lower end of the switch cooling airflow duct, where it continues to flow along the gap between the mounting base 420 and the capacitor module, thus providing air-cooled heat exchange for the switch module located near the mounting base 420. Since the switch cooling airflow is formed by the mounting gap of the power device 400 itself, this structure helps to convert a portion of the top-outflow airflow into a localized cooling airflow for the switch module, improving the targeted cooling efficiency for the switch module within the power device 400.
[0074] In the converter device disclosed in at least one embodiment, preferably, the switch heat dissipation duct is provided on both the front and rear sides of the mounting base 420, and forms a first power duct 820 and a second power duct 830 respectively; at least the second power duct 830 is adapted to guide the passing airflow to the return air inlet 122.
[0075] In the above design, when heat dissipation ducts are formed on both the front and rear sides of the mounting base 420, the airflow can flow around the switch modules and capacitor modules on both sides of the mounting base 420. The second power air duct 830 further serves to guide the heat-exchanged airflow to the return air vent 122, so that the heat dissipation airflow in the power device 400 area can better form a circulation loop and be sent back to the return air vent 122. In this way, on the one hand, it helps to improve the uniformity of heat dissipation on the front and rear sides of the power device 400, and on the other hand, it also reduces the possibility of the heat-exchanged airflow stagnating near the power device 400.
[0076] In the converter device disclosed in at least one embodiment, preferably, the air guide assembly further includes a second air guide 720, which is inclinedly disposed at the first air outlet 121 to guide the airflow sent out of the first air outlet 121 to the front of the cabinet 100.
[0077] In the above design, the second air guide 720 pre-changes the airflow direction at the first air outlet 121, making it easier for the airflow to reach the air receiving section 711 at the front of the cabinet 100. Since the return air outlet 122 is located behind the first air outlet 121, the inclined arrangement of the second air guide 720 can reduce the tendency for the airflow to short-circuit directly from the first air outlet 121 to the return air outlet 122, and improve the stability of the airflow received by the air receiving section 711.
[0078] In the power converter disclosed in at least one embodiment, preferably, the first power duct 820 is adapted to receive the airflow delivered by the vent 721, and the second power duct 830 is adapted to guide the airflow passing through the first power duct 820 to the return air vent 122.
[0079] In the above design, the second air guide 720 directs airflow to the front of the cabinet 100 while simultaneously allowing a portion of the airflow to directly enter the first power air duct 820 through the vent 721. After passing through the first power air duct 820, this portion of airflow can be further guided to the second power air duct 830 and flow towards the return air vent 122. Thus, the power device 400 area, in addition to receiving the airflow deflected by the air intake 711, can also receive supplementary airflow from the vent 721, further improving the heat dissipation efficiency for the switching module.
[0080] In the converter device disclosed in at least one embodiment, preferably, the switch module is installed on the front and rear sides of the mounting base 420, and the mounting base 420 is provided with a clearance opening 421 in the front-rear direction, which is adapted to guide the airflow in the first power duct 820 to the second power duct 830.
[0081] In the above design, when the switch module is located on both the front and rear sides of the mounting base 420, the cool air delivered by the vent 721 into the first power air duct 820 can first sweep the switch module and capacitor module on one side of the mounting base 420. After the clearance port 421 passes through the mounting base 420, the airflow in the first power air duct 820 can pass through the mounting base 420 and enter the second power air duct 830, continuing to exchange heat with the switch module and adjacent capacitor module on the other side of the mounting base 420. In this way, the obstruction of the airflow by the mounting base 420 can be reduced, and the heat exchange path spanning the front and rear sides is formed by the clearance port 421, which is beneficial to improving the heat dissipation uniformity of the power device 400 on both sides.
[0082] In the converter device disclosed in at least one embodiment, preferably, the power device 400 cooperates with the outer wall of the second compartment 130, and the DC device 200 and the AC device 300 cooperate to form a return air channel 840 located in the middle of the front-rear direction of the cabinet 100; the airflow guided by the air receiving part 711 to the DC device 200 located behind the first air guide 710 is guided to the return air outlet 122 through the return air channel 840 after passing at least part of the DC device 200.
[0083] In the above design, the return air duct 840 is located in the middle of the front-to-back direction of the cabinet 100, providing a return path for the heat-exchanged airflow near the DC device 200. The airflow guided by the air receiving part 711 to the DC device 200 can return to the return air outlet 122 via the return air duct 840 after passing the DC device 200. In this way, the DC device 200 can receive the cold air distributed from the first air outlet 121, and the heat-exchanged airflow can also be organized back to the top return air position, which helps to maintain the stability of the direction of the circulating airflow in the first compartment 120.
[0084] In the converter device disclosed in at least one embodiment, preferably, the first air guide 710 includes a functional device housing disposed in the first compartment 120; the functional device housing is spaced apart from the inner wall of the front side of the cabinet 100 to form an air supply duct 810, and the upper end of the functional device housing and / or the side facing the interior of the first compartment 120 forms an air receiving part 711.
[0085] In the above design, the first air guide 710 can be constructed from the existing functional component housing within the first compartment 120, allowing the functional component housing to simultaneously serve as a protective installation element and a guide for airflow. The gap between the functional component housing and the inner front wall of the cabinet 100 forms an air supply duct 810. After the upper end of this duct or the side facing the interior of the first compartment 120 forms a receiving section 711, an open flow distribution structure can be formed without the need for additional large-area enclosed panels. This facilitates the use of the existing space at the front of the cabinet 100 for airflow distribution and reduces the impact of the air guide structure on the arrangement of components within the first compartment 120.
[0086] In the converter device disclosed in at least one embodiment, preferably, a baffle plate 740 is also included; the power device 400 and the reactor device 500 are connected by a power terminal block 620 located on the upper side of the power device 400, and the baffle plate 740 is disposed in the front-back direction between the first air outlet 121 and the return air outlet 122 and above the power terminal block 620, which is suitable for blocking the airflow from passing above the power terminal block 620.
[0087] In the above design, with the power terminal block 620 located above the power device 400 and both the first air outlet 121 and the return air outlet 122 located at the top of the cabinet 100, a near-end path from the air outlet side to the return air side is easily formed above the power terminal block 620. After the baffle plate 740 is located between the first air outlet 121 and the return air outlet 122 and covers the power terminal block 620, it can prevent airflow from passing directly above the power terminal block 620. Thus, the airflow from the first air outlet 121 is more likely to enter the air receiving section 711, the switch cooling duct, or the area where the DC device 200 is located, which helps improve the effective utilization rate of the top air outlet.
[0088] An energy storage system is disclosed in at least one embodiment, which includes an energy storage device, a transformer, and a converter device as described in any of the above embodiments, wherein the DC side of the converter device is connected to the energy storage device and the AC side is connected to the transformer.
[0089] After adopting the above-mentioned converter equipment, the converter equipment can distribute and organize the circulating airflow in the first compartment 120 under the condition that the power device 400 and the DC device 200 are arranged vertically at the front of the cabinet 100, thereby improving the heat dissipation stability of the converter equipment in the energy storage system.
[0090] 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, include: The cabinet (100) has a first compartment (120) and a second compartment (130) that are isolated from each other; the top of the first compartment (120) is provided with a first air outlet (121) and a return air outlet (122) from front to back for forming a circulating airflow in the first compartment (120); A converter assembly includes a DC device (200), a power device (400), a reactor device (500), and an AC device (300) connected in sequence; the DC device (200), the power device (400), and the AC device (300) are located in the first compartment (120), and the reactor device (500) is located in the second compartment (130); the power device (400) and the DC device (200) are arranged from top to bottom and are located at the front of the cabinet (100), and the reactor device (500) and the AC device (300) are arranged from top to bottom and are located at the rear of the cabinet (100); and An air guiding assembly includes a first air guide (710); the first air guide (710) is disposed in the first compartment (120) and cooperates with the inner wall of the front side of the cabinet (100) to form an air supply duct (810) extending vertically and located at the front of the cabinet (100); the upper end of the first air guide (710) forms a receiving part (711), the receiving part (711) is adapted to receive the airflow sent from the first air outlet (121), and guide part of the airflow to the air supply duct (810), part of the airflow to at least a portion of the DC device (200) located behind the first air guide (710), and part of the airflow impacts and is deflected back to the power device (400) located above the first air guide (710); the air supply duct (810) is used to send the received airflow to the lower region of the first compartment (120).
2. The converter device as described in claim 1, characterized in that, The switching module in the power device (400) is mounted on at least one side of the vertically arranged mounting base (420) in the front-back direction, and the power device (400) has a capacitor module arranged at least on the corresponding side; a switch heat dissipation air duct is formed between the mounting base (420) and the capacitor module; the air receiving part (711) is adapted to send the airflow impacted and deflected to the power device (400) located above the first air guide (710) to the lower end of the switch heat dissipation air duct.
3. The converter device as described in claim 2, characterized in that, The switch cooling duct is provided on both the front and rear sides of the mounting base (420), forming a first power duct (820) and a second power duct (830) respectively; at least the second power duct (830) is adapted to guide the passing airflow to the return air inlet (122).
4. A converter device as described in claim 3, characterized in that, The air guiding assembly also includes a second air guiding element (720), which is inclinedly disposed at the first air outlet (121) to guide the airflow sent out from the first air outlet (121) to the front of the cabinet (100).
5. A converter device as described in claim 4, characterized in that, The second air guide (720) is provided with a ventilation opening (721); the first power air duct (820) is adapted to receive the airflow sent out by the ventilation opening (721), and the second power air duct (830) is adapted to guide the airflow passing through the first power air duct (820) to the return air vent (122).
6. A converter device as described in claim 5, characterized in that, The switch module is installed on the front and rear sides of the mounting base (420), and the mounting base (420) is provided with a clearance opening (421) in the front and rear direction. The clearance opening (421) is adapted to guide the airflow in the first power duct (820) to the second power duct (830).
7. A converter device as described in claim 1, characterized in that, The power device (400) cooperates with the outer wall of the second compartment (130), and the DC device (200) and AC device (300) cooperate to form a return air channel (840) located in the middle of the front-rear direction of the cabinet (100); the airflow guided by the air receiving part (711) to the DC device (200) located behind the first air guide (710) is guided to the return air inlet (122) through the return air channel (840) after passing at least part of the DC device (200).
8. A converter device as described in claim 1, characterized in that, The first air guide (710) includes a functional device housing disposed in the first compartment (120); the functional device housing is spaced apart from the inner wall of the front side of the cabinet (100) to form the air supply duct (810), and the upper end of the functional device housing and / or the side facing the interior of the first compartment (120) forms the air receiving part (711).
9. A converter device as described in claim 1, characterized in that, It also includes a wind deflector (740); the power device (400) and the reactor device (500) are connected by a power terminal block (620) located on the upper side of the power device (400), and the wind deflector (740) is disposed in the front-back direction between the first air outlet (121) and the return air outlet (122) and above the power terminal block (620), and is adapted to block the airflow from passing over the power terminal block (620).
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.