Converter and converter module

Abstract

According to the converter and the converter module, the converter comprises a power cavity, a converter body and a PCB assembly, a containing cavity is formed inwards in the power cavity, the converter body is contained in the containing cavity, and the converter body comprises an alternating current switch, an electric reactor, the power module, a capacitor pool assembly and a direct current switch which are electrically connected in sequence; the alternating-current switch and the direct-current switch are arranged in a first maintenance area of the accommodating cavity, and the reactor and the power module are arranged in a second maintenance area of the accommodating cavity; the PCB assembly is contained in the containing cavity and electrically connected with the converter body, the PCB assembly is arranged in the first overhaul area, and the PCB assembly is arranged above the direct-current switch. Therefore, on one hand, the overall structural layout size of the converter is compact, so that the occupied area required by the assembly of the converter can be reduced; and on the other hand, a user can operate and maintain the converter conveniently, the overhaul efficiency is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of energy storage equipment, and in particular relates to a converter and converter module. Background Technology

[0002] Converters are an important component of energy storage devices, used to controllably convert the voltage, frequency, number of phases, and other electrical quantities or characteristics of a power system.

[0003] In existing converter designs, vulnerable critical components such as power modules, PCB assemblies, AC switches, and DC switches are usually distributed inside the cabinet. This layout has obvious drawbacks: on the one hand, it results in an excessively large overall size of the converter, which not only increases the floor space required for assembly but also leads to low space utilization; on the other hand, the dispersed arrangement of components makes it inconvenient for users to operate and maintain the equipment, affecting both maintenance efficiency and maintenance costs. Utility Model Content

[0004] In view of this, it is necessary to provide a converter and converter module for solving the above-mentioned technical problems.

[0005] A converter, the converter comprising:

[0006] A power cavity is formed inwardly with a receiving cavity, the receiving cavity having a first maintenance area and a second maintenance area, the first maintenance area and the second maintenance area being disposed on both sides of the width direction of the power cavity;

[0007] The converter body is housed within the accommodating cavity. The converter body includes an AC switch, a reactor, a power module, a capacitor bank assembly, and a DC switch that are electrically connected in sequence. The AC switch and the DC switch are located in the first maintenance area, with the AC switch positioned below the DC switch. The reactor and the power module are located in the second maintenance area, with the reactor positioned below the power module.

[0008] The PCB assembly is housed within the accommodating cavity and electrically connected to the converter body. The PCB assembly is disposed within the first maintenance area and is positioned above the DC switch.

[0009] It is understandable that by arranging the converter body and PCB assembly within the power cavity, the overall structure of the converter can be made compact, thereby reducing the floor space required for its assembly. On the other hand, it also facilitates the operation and maintenance of the converter by the user, improving maintenance efficiency and reducing maintenance costs.

[0010] In one embodiment, the accommodating cavity is configured as a closed chamber.

[0011] Understandably, housing the converter body and PCB assembly in a sealed enclosure provides excellent waterproof protection for the converter's electronic components, enabling the converter to withstand harsh environments and improving its operational reliability.

[0012] In one embodiment, the converter further includes a heat exchange assembly housed within the accommodating cavity;

[0013] The heat exchange assembly is installed on the reactor on the side facing the power module, and sequentially provides air cooling to the power module, the capacitor bank assembly, the PCB assembly, the DC switch, the AC switch and the reactor.

[0014] It is understandable that air cooling is used to dissipate heat from the main body of the converter and the PCB assembly. In this process, the air cooling path setting can meet the usage requirements of effective heat dissipation for the power module, capacitor bank assembly, PCB assembly, DC switch, AC switch and reactor.

[0015] In one embodiment, the heat exchange assembly includes a liquid-cooled heat exchanger and a fan, the liquid-cooled heat exchanger being disposed on the air inlet side of the fan, and the fan being able to draw air from the location of the liquid-cooled heat exchanger.

[0016] The fan's exhaust side faces the power module.

[0017] It is understandable that using a liquid-cooled heat exchanger to provide cooling for the converter body and PCB assembly can effectively dissipate heat from both the converter body and PCB assembly, thus meeting the heat dissipation requirements of the converter.

[0018] In one embodiment, the converter further includes a heat dissipation cavity and a heat exchange device, wherein the heat exchange device is installed in the heat dissipation cavity and communicates with the liquid-cooled heat exchanger for dissipating heat to the cooling medium in the liquid-cooled heat exchanger.

[0019] The heat dissipation cavity is installed at the top of the power cavity.

[0020] It is understandable that the structure for dissipating heat from the cooling medium inside the liquid-cooled heat exchanger is located at the top of the power cavity. This allows the heat generated during the operation of the converter to be transferred to the top for dissipation. On the one hand, this prevents heat from accumulating in the power cavity and avoids the heat island effect, thereby improving the operating efficiency of the converter. On the other hand, it also enables the integration of the overall converter structure, so that the installation of the heat dissipation cavity does not require additional floor space for the assembly of the power cavity.

[0021] In one embodiment, a pipe joint is sealed between the heat dissipation cavity and the power cavity, and the pipe joint is connected to the liquid-cooled heat exchanger and the heat exchange device respectively.

[0022] It is understandable that pipe joints are used to enable the flow of cooling medium between the liquid-cooled heat exchanger and the heat exchange device, so that the flow of cooling medium between the liquid-cooled heat exchanger and the heat exchange device will not affect the sealing of the accommodating cavity on the power chamber.

[0023] In one embodiment, the number of fans is configured to be multiple, and the multiple fans are arranged sequentially at intervals along the length of the liquid-cooled heat exchanger.

[0024] It is understandable that using multiple fans to blow out the cooling medium inside the liquid-cooled heat exchanger can increase the cooling capacity that the heat exchange component can provide, thereby effectively dissipating heat from the main body of the converter and the PCB assembly.

[0025] In one embodiment, the converter further includes a transfer fan housed within the receiving cavity;

[0026] The transfer fan is located on the side of the capacitor bank assembly facing the PCB assembly and is used to blow air onto the PCB assembly.

[0027] It is understandable that by using the airflow from the transfer fan, the power cavity can circulate the airflow to cool the converter body and PCB assembly, thus meeting the heat dissipation requirements of the converter body and PCB assembly.

[0028] This application also provides a converter module, including multiple converters as described above, wherein the multiple converters are connected in parallel.

[0029] In one embodiment, multiple converters are arranged side by side along the length of the power cavity, and adjacent converters are abutted and limited.

[0030] It is understandable that arranging multiple converters side by side without gaps can achieve compact parallel operation between multiple converters in the converter module, which can reduce the floor space required for the assembly of the converter module.

[0031] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0032] The converter and converter module for which protection is sought in this application house the converter body and PCB assembly within a sealed enclosure, thereby providing excellent waterproof protection for the electronic components of the converter, enabling the converter to withstand harsh environments and improving the reliability of its operation. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a left view of the converter provided in this application, where the dashed arrows represent the circulating air paths within the power cavity housing.

[0035] Figure 2 Rear view of the converter provided in this application.

[0036] Figure 3 This is a front view of the converter provided in this application.

[0037] Figure 4 This is a schematic diagram of the heat exchange device in this application.

[0038] Reference numerals: 100, Converter; 10, Power cavity; 11, Receptacle; 111, First maintenance area; 112, Second maintenance area; 20, Converter body; 21, AC switch; 22, Reactor; 23, Power module; 24, Capacitor cell assembly; 25, DC switch; 30, PCB assembly; 40, Heat exchange assembly; 41, Liquid-cooled heat exchanger; 51, Heat dissipation cavity; 511, Pipe joint; 52, Heat exchange device; 521, Water-air heat exchanger; 522, Cooling fan; 60, Transfer fan. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] The converter 100 that this application seeks to protect specifically refers to a high-power energy storage converter in an energy storage device.

[0043] like Figures 1 to 3As shown, the converter 100 provided in this application includes a power cavity 10, a converter body 20, and a PCB assembly 30. The power cavity 10 has an inwardly formed receiving cavity 11, which has a first maintenance area 111 and a second maintenance area 112. The first maintenance area 111 and the second maintenance area 112 are located on both sides of the power cavity in the width direction X. The converter body 20 is housed in the receiving cavity 11. The converter body 20 includes an AC switch 21, a reactor 22, a power module 23, and a capacitor bank assembly 240, which are electrically connected in sequence. The DC switch 25 and AC switch 21 are disposed in the first maintenance area 111, with AC switch 21 positioned below DC switch 25. The reactor 22 and power module 23 are disposed in the second maintenance area 112, with reactor 22 positioned below power module 23. The PCB assembly 30 is housed in the receiving cavity 11 and electrically connected to the converter body 20. The PCB assembly 30 is disposed in the first maintenance area 111 and above DC switch 25. In other words, the converter 100 of this application arranges the power module 23, PCB assembly 30, AC switch 21, and DC switch 25 on both sides of the power cavity width direction X of the converter 100. That is, the converter 100 arranges key components and vulnerable parts on the front and rear sides of the converter 100.

[0044] As can be seen from the above, the converter 100 of this application, through the arrangement of the converter body 20 and PCB assembly 30 in the power cavity 10, can make the overall structure of the converter 100 compact, thereby reducing the floor space required for the assembly of the converter 100; on the other hand, it can also facilitate the operation and maintenance of the converter 100 by the user, thereby improving maintenance efficiency and reducing maintenance costs.

[0045] It should be noted that the DC side of the converter 100 in this application is connected by a DC switch 25. The DC switch 25 is connected upwards to the capacitor bank assembly 24, the capacitor bank assembly 24 is connected to the power module 23, the power module 23 is connected downwards to the reactor 22, and the reactor 22 outputs a busbar that is then connected to the AC switch 21. The outlet position of the AC switch 21 can be designed according to the application scenario. Here, the electronic components connected to each other in the entire electrical circuit path of the converter 100 are close together. This shortens the main circuit path for electrical connections in the converter 100, thereby reducing the length of the copper busbars used for electrical connections in the converter 100, which has the effect of reducing the cost of copper busbar connections used in the converter 100.

[0046] In one embodiment, the accommodating cavity 11 is configured as a sealed chamber. That is, in this embodiment, the converter 100 houses the converter body 20 and PCB assembly 30 within the sealed accommodating cavity 11, providing excellent waterproof protection for the converter's electronic components. This allows the converter 100 to withstand harsh environments and improves its operational reliability. Here, the power cavity 10 is configured with an IP65 high-protection cavity structure.

[0047] like Figure 1 , Figure 2 As shown, in one embodiment, the converter 100 further includes a heat exchange assembly 40, which is housed within the receiving cavity 11. The heat exchange assembly 40 is mounted on the reactor 22 on the side facing the power module 23, and sequentially provides air cooling to the power module 23, capacitor bank assembly 24, PCB assembly 30, DC switch 25, AC switch 21, and reactor 22. In other words, the converter 100 of this embodiment can use air cooling to dissipate heat from the converter body 20 and PCB assembly 30. During this process, the air cooling path configuration effectively meets the heat dissipation requirements of the power module 23, capacitor bank assembly 24, PCB assembly 30, DC switch 25, AC switch 21, and reactor 22.

[0048] It should be noted that when the converter 100 is working in this embodiment, as the airflow path for heat dissipation circulates, the cooling capacity for power module 23, capacitor bank assembly 24, PCB assembly 30, DC switch 25, AC switch 21 and reactor 22 gradually decreases. This also meets the requirement that the power module 23, capacitor bank assembly 24 and PCB assembly 30 have a lower temperature tolerance than the reactor 22.

[0049] like Figure 1 , Figure 2 As shown, in this embodiment, the heat exchange assembly 40 includes a liquid-cooled heat exchanger 41 and a fan (not shown). The liquid-cooled heat exchanger 41 is disposed on the air inlet side of the fan, and the fan can draw air from the location of the liquid-cooled heat exchanger 41. The air outlet side of the fan is disposed towards the power module 23. That is to say, the heat exchange assembly 40 of this embodiment can use the liquid-cooled heat exchanger 41 to provide cooling capacity for the converter body 20 and the PCB assembly 30, thus ensuring that both the converter body 20 and the PCB assembly 30 can be effectively cooled to meet the heat dissipation requirements of the converter 100.

[0050] In this embodiment, multiple fans are configured, arranged sequentially at intervals along the length of the liquid-cooled heat exchanger 41. That is, the heat exchange assembly 40 in this embodiment can use multiple fans to blow out the cooling medium from the liquid-cooled heat exchanger 41, thereby increasing the cooling capacity provided by the heat exchange assembly 40 to effectively dissipate heat from the converter body 20 and the PCB assembly 30.

[0051] like Figures 1 to 4 As shown, in this embodiment, the converter 100 further includes a heat dissipation cavity 51 and a heat exchange device 52. The heat exchange device 52 is installed inside the heat dissipation cavity 51 and communicates with the liquid-cooled heat exchanger 41 to dissipate heat from the cooling medium inside the liquid-cooled heat exchanger 41. The heat dissipation cavity 51 is installed at the top of the power cavity 10. In other words, this embodiment arranges the structure for dissipating heat from the cooling medium inside the liquid-cooled heat exchanger 41 at the top of the power cavity 10, so that the heat generated during the operation of the converter 100 can be transferred to the top for dissipation. This prevents heat from accumulating inside the power cavity 10, thus preventing the formation of a heat island effect and improving the operating efficiency of the converter 100. On the other hand, it also achieves the integration of the overall structure of the converter 100, so that the installation of the heat dissipation cavity 51 does not require additional floor space for the assembly of the power cavity 10. It is understood that in other embodiments, the heat dissipation cavity 51 can also be set independently of the heat dissipation cavity 51. Specifically, the heat dissipation cavity 51 can be set at a place far away from the power cavity 10, and the heat exchange device 52 in the heat dissipation cavity 51 can be connected to the liquid cooling heat exchanger 41 through a pipeline.

[0052] like Figures 1 to 3 As shown, in this embodiment, a pipe joint 511 is sealingly connected between the heat dissipation cavity 51 and the power cavity 10. The pipe joint 511 is connected to both the liquid-cooled heat exchanger 41 and the heat exchange device 52. In other words, this embodiment uses the pipe joint 511 to allow the flow of the cooling medium between the liquid-cooled heat exchanger 41 and the heat exchange device 52, ensuring that this flow does not affect the sealing of the accommodating cavity 11 on the power cavity 10. Here, the pipe joint 511 is installed to the power cavity 10 by welding, or alternatively, by using a sealing ring to achieve high protective isolation between the power cavity 10 and the heat dissipation cavity 51, and to maintain the IP65 protection rating of the power cavity 10.

[0053] like Figure 4As shown, in this embodiment, the heat exchange device 52 includes a water-air heat exchanger 521 and a cooling fan 522. The cooling fan 522 is mounted on the water-air heat exchanger 521 and is used to blow the heat of the cooling medium inside the water-air heat exchanger 521 outward. Here, the water-air heat exchanger 521 can specifically be a plate / tube-fin heat exchanger. It is understood that in other embodiments, the heat exchange device 52 can also be configured as a phase change cooling device or a compressor refrigeration device, which will not be elaborated here.

[0054] like Figure 1 As shown, in one embodiment, the converter 100 further includes a transfer fan 60, which is housed within the receiving cavity 11. The transfer fan 60 is disposed on the side of the capacitor bank assembly 24 facing the PCB assembly 30 and is used to blow air onto the PCB assembly 30. In other words, the converter 100 of this embodiment can use the airflow from the transfer fan 60 to circulate the airflow through the power cavity 10 during air cooling of the converter body 20 and the PCB assembly 30, thus meeting the heat dissipation requirements for the converter body 20 and the PCB assembly 30. Here, the transfer fan 60 is positioned at the upper part of the capacitor bank assembly 24.

[0055] In addition, this application also provides a converter module (not shown in the figure), which includes multiple converters 100 as described above, and the multiple converters 100 are connected in parallel to meet different usage requirements.

[0056] In one embodiment, multiple converters 100 are arranged side-by-side along the length Y of the power cavity, and adjacent converters 100 are abutted and limited. That is, in this embodiment, multiple converters 100 are arranged side-by-side without gaps in the converter module, which enables compact parallel operation of multiple converters 100 in the converter module and reduces the floor space required for the assembly of the converter module.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A converter, characterized in that, The converter (100) includes: The power cavity (10) has an inwardly formed receiving cavity (11), the receiving cavity (11) having a first maintenance area (111) and a second maintenance area (112), the first maintenance area (111) and the second maintenance area (112) being disposed on both sides of the width direction of the power cavity; The converter body (20) is housed in the accommodating cavity (11). The converter body (20) includes an AC switch (21), a reactor (22), a power module (23), a capacitor bank assembly (24), and a DC switch (25) that are electrically connected in sequence. The AC switch (21) and the DC switch (25) are located in the first maintenance area (111), and the AC switch (21) is located below the DC switch (25). The reactor (22) and the power module (23) are located in the second maintenance area (112), and the reactor (22) is located below the power module (23). The PCB assembly (30) is housed in the accommodating cavity (11) and electrically connected to the converter body (20). The PCB assembly (30) is located in the first maintenance area (111) and is located above the DC switch (25).

2. The converter according to claim 1, characterized in that, The accommodating cavity (11) is configured as a closed chamber.

3. The converter according to claim 1, characterized in that, The converter (100) further includes a heat exchange assembly (40) housed within the accommodating cavity (11); The heat exchange component (40) is installed on the reactor (22) on the side facing the power module (23) and sequentially provides air cooling to the power module (23), the capacitor bank assembly (24), the PCB assembly (30), the DC switch (25), the AC switch (21) and the reactor (22).

4. The converter according to claim 3, characterized in that, The heat exchange assembly (40) includes a liquid-cooled heat exchanger (41) and a fan. The liquid-cooled heat exchanger (41) is located on the air inlet side of the fan, and the fan can draw air from the location of the liquid-cooled heat exchanger (41). The fan's exhaust side faces the power module (23).

5. The converter according to claim 4, characterized in that, The converter (100) further includes a heat dissipation cavity (51) and a heat exchange device (52). The heat exchange device (52) is installed in the heat dissipation cavity (51) and communicates with the liquid-cooled heat exchanger (41) to dissipate heat from the cooling medium in the liquid-cooled heat exchanger (41). The heat dissipation cavity (51) is installed at the top of the power cavity (10).

6. The converter according to claim 5, characterized in that, A pipe joint (511) is sealed between the heat dissipation cavity (51) and the power cavity (10), and the pipe joint (511) is connected to the liquid-cooled heat exchanger (41) and the heat exchange device (52) respectively.

7. The converter according to claim 4, characterized in that, The number of fans is configured to be multiple, and the multiple fans are arranged sequentially at intervals along the length direction of the liquid-cooled heat exchanger (41).

8. The converter according to claim 3, characterized in that, The converter (100) also includes a transfer fan (60) housed within the receiving cavity (11); The transfer fan (60) is disposed on the side of the capacitor pool assembly (24) facing the PCB assembly (30) and is used to blow air onto the PCB assembly (30).

9. A converter module, characterized in that, It includes multiple converters (100) as described in any one of claims 1 to 8, wherein the multiple converters (100) are connected in parallel.

10. The converter module according to claim 9, characterized in that, Multiple converters (100) are arranged side by side along the length of the power cavity, and two adjacent converters (100) of the multiple converters (100) abut against each other.

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