Electrical cabinet and energy storage system

Abstract

The embodiment of the utility model provides an electrical cabinet and an energy storage system, and belongs to the technical field of electrics. The electrical cabinet comprises a cabinet which forms an outer circulation bin and an inner circulation bin; the outer circulation bin is provided with a first ventilation opening and a second ventilation opening which are communicated with the outside, the outer circulation bin is provided with a first electronic device, a first fan and a first surface air cooler, and the first fan is used for driving air to enter the outer circulation bin from the first ventilation opening, flow through the first surface air cooler and flow out from the second ventilation opening; the inner circulation bin is provided with a second electronic device, a second fan, a liquid cooling radiator and a second surface air cooler, the second fan is used for driving air in the inner circulation bin to flow through the second surface air cooler, the liquid cooling radiator is used for cooling at least part of the second electronic device, and the second surface air cooler and the liquid cooling radiator are respectively communicated with the first surface air cooler through heat exchange pipelines. According to the invention, the protection level can be improved through the closed internal circulation bin, and effective heat dissipation can be carried out on internal electronic devices.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to an electrical cabinet and energy storage system. Background Technology

[0002] During operation, the electronic components inside electrical cabinets such as PCS generate a lot of heat. If the heat cannot be dissipated in time, it will affect the working performance of the electrical cabinet and may even lead to safety accidents in severe cases.

[0003] However, the improved heat dissipation capacity of the PCS electrical cabinet has reduced its protective capabilities, making it unable to effectively protect the electronic components inside the cabinet, thus requiring improvement. Utility Model Content

[0004] This application provides an electrical cabinet and energy storage system that can improve the protection level through a sealed internal circulation chamber and effectively dissipate heat from the internal electronic components.

[0005] In a first aspect, embodiments of this application provide an electrical cabinet, including: a cabinet, the cabinet forming an outer circulation compartment and an inner circulation compartment;

[0006] The external circulation chamber is provided with a first ventilation opening and a second ventilation opening that communicate with the outside. The external circulation chamber is also provided with a first electronic device, a first fan and a first surface cooler. The first fan is used to drive air to enter the external circulation chamber from the first ventilation opening and flow through the first surface cooler and out from the second ventilation opening.

[0007] The inner circulation chamber is equipped with a second electronic device, a second fan, a liquid-cooled radiator, and a second surface cooler. The second fan is used to drive the air in the inner circulation chamber to flow through the second surface cooler. The liquid-cooled radiator is used to dissipate heat for at least part of the second electronic device. The second surface cooler and the liquid-cooled radiator are each connected to the first surface cooler through heat exchange pipes.

[0008] In the above technical solution, the cabinet is divided into an inner circulation chamber connected to the outside and a sealed outer circulation chamber. The outer circulation chamber is equipped with a first fan and a first surface cooler. The first fan can drive outside air to flow through the first surface cooler to blow the low-temperature gas on the surface of the first surface cooler to the first electronic device, thereby achieving heat dissipation of the first electronic device through air cooling. The outer circulation chamber is equipped with a second fan, a liquid cooling radiator and a second surface cooler. The low-temperature refrigerant in the first surface cooler can flow into the second surface cooler and the liquid cooling radiator, thereby achieving liquid cooling for the second electronic device with the lowest temperature resistance and air cooling for the second electronic device with lower temperature resistance. The sealed inner circulation chamber meets the high protection requirements of the second electronic device, improving the protection of the second electronic device, and also effectively dissipates heat from it.

[0009] In some embodiments, the cabinet further includes a base, and multiple sides of the base are provided with air inlets, with the first air inlet located on the top wall of the base.

[0010] In some embodiments, the inner circulation chamber includes a first part and a second part connected together. The first part is higher than the second part and the outer circulation chamber in the height direction. The second part and the outer circulation chamber are arranged side by side in the horizontal direction. The liquid cooling radiator is disposed in the first part, and the second fan and the second surface cooler are disposed in the second part.

[0011] In some embodiments, the second vent is located on the wall of the external circulation compartment away from the second portion, and the second surface cooler is located on the wall of the second portion away from the external circulation compartment.

[0012] In some embodiments, the second electronic device includes a power module, a DC disconnect switch, and an AC circuit breaker. The power module is disposed in the first part, and the liquid-cooled heat sink is used to dissipate heat from the power module. The DC disconnect switch and the AC circuit breaker are disposed in the second part.

[0013] In some embodiments, the DC disconnect switch and the AC circuit breaker are arranged side by side along the height of the electrical cabinet and are located on one side of the second surface cooler.

[0014] In some embodiments, the input port of the DC disconnect switch is located at the bottom of the inner circulation compartment along the height direction, and the output port of the DC disconnect switch faces the power module along the height direction.

[0015] In some embodiments, the output port of the AC circuit breaker is disposed on the side wall of the inner circulation compartment, and the input port of the AC circuit breaker is disposed above the output port of the AC circuit breaker along the height direction of the electrical cabinet;

[0016] The first electronic device includes a reactor, with the input port of the reactor facing the first portion and the output port of the reactor facing the second portion.

[0017] In some embodiments, the first electronic device, the first surface cooler, and the first vent are arranged sequentially along the height direction of the electrical cabinet, and the first electronic device is arranged horizontally on one side of the second vent.

[0018] In some embodiments, the cabinet includes a cabinet body, a partition, and a door. The partition is disposed within the cabinet body and serves to separate the inner circulation compartment and the outer circulation compartment. The door is openable and closable within the cabinet body, and the partition is disposed opposite to the door. The electrical cabinet further includes electrical connectors, which include a first connector and a second connector for electrical connection. The first connector is disposed within the inner circulation compartment and installed on the side of the partition facing the door. The second connector is disposed on the second electronic device. When the first connector and the second connector are in an assembled state, the projections of the first connector and the second connector along the arrangement direction of the door and the partition at least partially overlap.

[0019] Secondly, embodiments of this application also provide an energy storage system, including the electrical cabinet in any of the above embodiments.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is one of the structural schematic diagrams of the electrical cabinet provided in some embodiments of this application;

[0023] Figure 2 This is the second schematic diagram of the structure of the electrical cabinet provided in some embodiments of this application;

[0024] Figure 3 This is the third schematic diagram of the electrical cabinet provided in some embodiments of this application;

[0025] Figure 4 Fourth schematic diagram of the electrical cabinet provided for some embodiments of this application;

[0026] Figure 5 Fifth schematic diagram of the electrical cabinet provided for some embodiments of this application;

[0027] Figure 6 Sixth schematic diagram of the electrical cabinet provided for some embodiments of this application;

[0028] Figure 7 Seventh schematic diagram of the electrical cabinet provided for some embodiments of this application;

[0029] Figure 8 Eighth schematic diagram of the electrical cabinet provided for some embodiments of this application;

[0030] Figure 9 This is one of the structural schematic diagrams of electrical connectors provided in some embodiments of this application;

[0031] Figure 10 This is a second schematic diagram of the structure of an electrical connector provided in some embodiments of this application;

[0032] Figure 11 This is a schematic diagram of the top cover structure provided for some embodiments of this application.

[0033] Figure label:

[0034] Cabinet 1, external circulation compartment 11, first ventilation opening 111, second ventilation opening 112, internal circulation compartment 12, first part 121, second part 122, spacer 13, base 14, air inlet 141, top cover 15, door 16, cabinet 17;

[0035] 2. First fan; 3. First surface cooler; 4. Second fan; 5. Liquid-cooled radiator; 6. Second surface cooler; 7. Heat exchange piping.

[0036] 8. Reactor; 9. Second electronic device; 91. Power module; 92. DC disconnect switch; 93. AC circuit breaker; 94. Electrical connector; 941. First connector; 942. Second connector. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0039] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0042] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0043] A power converter system (PCS) is used to connect a power generation device and an energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power converter system. For example, the power generation device can be a solar panel, hydroelectric power generation device, thermal power generation device, wind power generation device, etc. This application does not limit the specific type of power generation device.

[0044] During operation, the electronic components inside electrical cabinets such as PCS generate a lot of heat. If the heat cannot be dissipated in time, it will affect the working performance of the electrical cabinet and may even lead to safety accidents in severe cases.

[0045] However, the improved heat dissipation capacity of the PCS electrical cabinet reduces its protective capabilities, making it unable to effectively protect the electronic components inside the cabinet.

[0046] To solve the above problems, such as Figures 1-11As shown, this application provides an electrical cabinet and an energy storage system that can both meet the protection requirements of the electrical cabinet and improve its heat dissipation capacity.

[0047] like Figure 4 and Figure 5 As shown, the electrical cabinet provided in this application embodiment includes: a cabinet 1, the cabinet 1 forming an outer circulation compartment 11 and an inner circulation compartment 12, the inner circulation compartment 12 being a closed compartment, the outer circulation compartment 11 being connected to the outside, the protection level of the inner circulation compartment 12 being higher than that of the outer circulation compartment 11, the inner circulation compartment 12 being used to place a second electronic device 9 with a higher protection level requirement, and the outer circulation compartment 11 being used to place a first electronic device with a lower protection level requirement than the second electronic device 9.

[0048] The first electronic device can be a reactor 8 or a transformer, etc., and the second electronic device 9 can be a power module 91, a DC disconnect switch 92, an AC circuit breaker 93, a secondary circuit assembly, and an AC / DC switch assembly, etc.

[0049] like Figure 5 and Figure 6 As shown, the external circulation chamber 11 is provided with a first ventilation port 111 and a second ventilation port 112 that communicate with the outside. The external circulation chamber 11 is also provided with a first electronic device, a first fan 2 and a first surface cooler 3. The first fan 2 is used to drive air to enter the external circulation chamber 11 from the first ventilation port 111 and flow through the first surface cooler 3 and out from the second ventilation port 112.

[0050] One of the first ventilation opening 111 and the second ventilation opening 112 is an air inlet, and the other of the first ventilation opening 111 and the second ventilation opening 112 is an air outlet. The first ventilation opening 111 and the second ventilation opening 112 form a convection.

[0051] The first fan 2 can drive outside air into the external circulation chamber 11 from the first vent 111 and out from the second vent 112. The first vent 111 is the air inlet and the second vent 112 is the air outlet.

[0052] The first surface cooler 3 can be placed in the first vent 111, or it can be placed in the second vent 112, or it can be placed in the ventilation duct formed by the first vent 111 and the second vent 112. In all these cases, the air flowing into the external circulation chamber 11 from the outside passes through the first surface cooler 3 and flows out through the second vent 112 to cool the gas entering the external circulation chamber 11. This can reduce the temperature inside the external circulation chamber 11, thereby dissipating heat from the first electronic device, while simultaneously expelling the high-temperature air from the second vent 112.

[0053] In this embodiment, the external circulation chamber 11 is provided with a first fan 2 and a first surface cooler 3. The first fan 2 can drive outside air to flow through the first surface cooler 3 to blow the low-temperature gas on the surface of the first surface cooler 3 to the first electronic device, thereby realizing heat dissipation of the first electronic device through air cooling.

[0054] In some embodiments, such as Figure 7 As shown, along the height of the electrical cabinet, the first electronic device, the first surface cooler 3, and the first vent 111 are arranged in sequence. The first surface cooler 3 is located at the first vent 111, and the air inlet side of the first fan 2 faces the first surface cooler 3 so that outside air is drawn in from the first vent 111 and enters the external circulation chamber 11 through the first surface cooler 3. The first surface cooler 3 can cool the air flowing through it.

[0055] In this embodiment, the first electronic device is arranged horizontally on one side of the second vent 112 to increase the airflow over the surface of the first electronic device and improve the heat dissipation effect of the first electronic device.

[0056] In some embodiments, such as Figure 7 As shown, the air inlet side of the first fan 2 faces the first electronic device to accelerate the airflow on the surface of the first electronic device and improve the heat dissipation effect of the first electronic device.

[0057] In some embodiments, such as Figure 7 As shown, the second vent 112 is higher than the first vent 111 along the height direction of the electrical cabinet, and the first electronic device is located on one side of the second vent 112. The air inlet side of the first fan 2 faces the first electronic device, so that the outside air entering from the first vent 111 first passes through the first surface cooler 3 into the external circulation chamber 11, and then passes through the surface of the first electronic device through the guiding action of the first fan 2, and finally is discharged from the second vent 112, thereby achieving the effect of heat dissipation for the first electronic device.

[0058] In some embodiments, both the first vent 111 and the second vent 112 may be equipped with dustproof and insectproof nets to reduce the risk of debris entering the external circulation chamber 11.

[0059] like Figure 6 and Figure 7 As shown, the inner circulation chamber 12 may be equipped with a second electronic device 9, a second fan 4, a liquid-cooled radiator 5, and a second surface cooler 6.

[0060] The second electronic device 9 has high protection requirements and is installed in the inner circulation chamber 12 with a high protection level.

[0061] The second fan 4 is used to drive the air in the inner circulation chamber 12 to flow through the second surface cooler 6, so as to accelerate the air flow rate on the surface of the second surface cooler 6 and accelerate the cooling of the air in the inner circulation chamber 12. The second surface cooler 6 is used to cool the air in the inner circulation chamber 12.

[0062] At least some of the second electronic components 9 have the lowest temperature resistance and higher heat dissipation requirements. The liquid cooling radiator 5 is used to dissipate heat for at least some of the second electronic components 9 with the lowest temperature resistance. The second electronic components 9 can achieve dual heat dissipation through liquid cooling radiator 5 and second fan 4, thereby increasing the heat dissipation effect and improving the stability of the electrical cabinet operation.

[0063] The liquid-cooled heat sink 5 is used to dissipate heat for at least part of the second electronic device 9. The liquid-cooled heat sink 5 can be a heat dissipation device such as a liquid cooling plate or a liquid cooling pipe.

[0064] The liquid-cooled heat sink 5 can be disposed on the side of at least part of the second electronic device 9, and the specific location can be determined according to the placement of the part of the second electronic device 9 with the lowest temperature resistance.

[0065] The number of liquid-cooled heat sinks 5 can be determined based on the number and volume of the second electronic device 9 with the lowest temperature resistance. For example, multiple liquid-cooled heat sinks 5 can be included, and multiple liquid-cooled heat sinks 5 can be inserted between the second electronic device 9 with the lowest temperature resistance.

[0066] Multiple liquid-cooled heat sinks 5 can be connected in parallel to the first surface cooler 3, so that the low-temperature refrigerant in the first surface cooler 3 can enter the multiple liquid-cooled heat sinks 5, thereby improving the heat dissipation effect of the second electronic device 9, which has the lowest temperature resistance.

[0067] For the second electronic device 9, which has high protection requirements but low heat dissipation requirements, it can be directly installed in the inner circulation chamber 12. The temperature of the inner circulation chamber 12 can be reduced by the second surface cooler 6, thereby providing air cooling for the second electronic device 9, which has low temperature resistance.

[0068] Among them, such as Figure 6 As shown, the second surface cooler 6 and the liquid-cooled radiator 5 are each connected to the first surface cooler 3 through heat exchange pipes 7.

[0069] The liquid-cooled radiator 5 and the second surface cooler 6 are connected in parallel. The outlet of the first surface cooler 3 is connected to the inlet of the liquid-cooled radiator 5 and the inlet of the second surface cooler 6, respectively, so as to transport the low-temperature refrigerant in the first surface cooler 3 to the liquid-cooled radiator 5 and the second surface cooler. The outlet of the liquid-cooled radiator 5 and the outlet of the second surface cooler 6 are connected to the inlet of the first surface cooler 3, respectively, so as to return the high-temperature refrigerant in the liquid-cooled radiator 5 and the second surface cooler 6 to the first surface cooler 3.

[0070] In this embodiment, the low-temperature refrigerant in the first surface cooler 3 can flow into the second surface cooler 6 and the liquid cooling radiator 5, thereby achieving liquid cooling and air cooling for the second electronic device 9 with the highest heat dissipation requirements, and air cooling for the second electronic device 9 with general heat dissipation requirements.

[0071] The second surface cooler 6 and the liquid-cooled radiator 5 are each connected to the first surface cooler 3 through a heat exchange pipe 7. The extension direction of the heat exchange pipe 7 can be determined according to the arrangement of the second surface cooler 6, the liquid-cooled radiator 5 and the first surface cooler 3.

[0072] The outside of the heat exchange pipe 7 can be wrapped with heat insulation material to reduce the temperature loss of the heat exchange pipe 7, reduce the thermal interference between the inlet and outlet pipes of the heat exchange pipe 7, and reduce the thermal interference of the heat exchange pipe to the compartment.

[0073] According to the electrical cabinet provided in this application, the cabinet 1 is divided into an inner circulation chamber 12 that is connected to the outside and a sealed outer circulation chamber 11. The outer circulation chamber 11 is equipped with a first fan 2 and a first surface cooler 3. The first fan 2 can drive outside air to flow through the first surface cooler 3 to blow the low-temperature gas on the surface of the first surface cooler 3 to the first electronic device, thereby achieving heat dissipation of the first electronic device through air cooling. The outer circulation chamber 11 is equipped with a second fan 4, a liquid cooling radiator 5 and a second surface cooler 6. The low-temperature refrigerant in the first surface cooler 3 can flow into the second surface cooler 6 and the liquid cooling radiator 5, thereby achieving liquid cooling and air cooling for the second electronic device 9 with the lowest temperature resistance, and air cooling for the second electronic device 9 with a relatively low temperature resistance. The sealed inner circulation chamber 12 meets the high protection requirements of the second electronic device 9 and can also effectively dissipate heat from it.

[0074] In some embodiments, such as Figure 7 As shown, the second vent 112 is located on the wall of the external circulation chamber 11 away from the second part 122, and the second surface cooler 6 is located on the wall of the second part 122 away from the external circulation chamber 11.

[0075] The second vent 112 and the second surface cooler 6 are arranged opposite each other on the front and rear walls of the cabinet 1 along the front-rear direction of the electrical cabinet. Alternatively, the second vent 112 and the second surface cooler 6 can be arranged opposite each other on the left and right walls of the cabinet 1 along the left-right direction of the electrical cabinet. That is, the second vent 112 and the second surface cooler 6 are spaced far apart on the electrical cabinet, which can reduce the thermal interference of the high-temperature gas discharged from the second vent 112 on the second surface cooler 6 and improve the heat dissipation effect of the inner circulation chamber 12.

[0076] In some embodiments, such as Figure 7As shown, the second vent 112 is located on the rear wall of the electrical cabinet along the front-to-back direction, and the second surface cooler 6 is located on the front wall of the electrical cabinet along the front-to-back direction. Since the gas discharged from the second vent 112 is at a higher temperature, placing the second vent 112 on the rear wall of the electrical cabinet can reduce the risk of hot air blowing directly on the human body and improve the safety of the electrical cabinet. At the same time, the second surface cooler 6 can be opened and closed with the front door, making it easy to operate.

[0077] In some embodiments, such as Figure 1 and Figure 2 As shown, the cabinet 1 also includes a base 14, which is located at the bottom of the cabinet 1 along the height direction of the electrical cabinet and can provide stable support for the cabinet 1.

[0078] The base 14 has air inlets 141 on multiple sides. The first ventilation port 111 is located on the top wall of the base 14. The first ventilation port 111 is connected to the air inlets 141 on multiple sides. The air inlets 141 are used to introduce outside air. By introducing air from multiple sides, the air volume entering the external circulation chamber 11 can be increased, thereby increasing the amount of gas passing through the first surface cooler 3 and improving the heat dissipation effect of the external circulation chamber 11.

[0079] In some embodiments, such as Figure 4 and Figure 7 As shown, the inner circulation chamber 12 includes a first part 121 and a second part 122 connected together. The first part 121 is higher than the second part 122 and the outer circulation chamber 11 in the height direction. The liquid cooling radiator 5 is disposed in the first part 121, and the second fan 4 and the second surface cooler 6 are disposed in the second part 122.

[0080] The part with the highest heat dissipation requirements, the second electronic device 9, is located in the first part 121 and can be cooled by liquid cooling and air cooling through the liquid cooling heat sink 5. The part with the general heat dissipation requirements, the second electronic device 9, is located in the second part 122 and can be cooled by air cooling through the second fan 4 and the second surface cooler 6.

[0081] In this embodiment, by setting the inner circulation compartment 12 as a first part 121 and a second part 122, the spatial layout inside the cabinet 1 is optimized, the compactness of the cabinet 1 is improved, and the wiring connection of the first electronic device and the second electronic device 9 is facilitated, reducing the difficulty of wiring; at the same time, the second electronic device 9, which generates the most heat, can be placed separately from other parts of the second electronic device 9 for separate heat dissipation, thereby reducing mutual thermal interference, improving the working stability of the second electronic device 9, and improving the working reliability of the electrical cabinet.

[0082] The second part 122 and the external circulation chamber 11 are arranged side by side in the horizontal direction, which can shorten the length of the heat exchange pipeline 7 between the first surface cooler 3 and the second surface cooler 6, as well as the heat exchange pipeline 7 between the first surface cooler 3 and the liquid cooling radiator 5, reduce the heat loss of the heat exchange pipeline 7, and improve the structural compactness of the electrical cabinet.

[0083] In some embodiments, such as Figure 7 As shown, the second electronic device 9 includes a power module 91, a DC disconnect switch 92, and an AC circuit breaker 93. The power module 91 is located in the first part 121, and the liquid cooling heat sink 5 is used to dissipate heat from the power module 91. The DC disconnect switch 92 and the AC circuit breaker 93 are located in the second part 122.

[0084] Among them, the power module 91 has the lowest heat resistance and the largest heat generation during operation. The liquid cooler 5 is used to cool the power module 91 by liquid cooling, while the second surface cooler 6 and the second fan 4 can cool the power module 91 by air cooling, which can improve the heat dissipation effect of the power module 91 and improve the stability of the power module 91 under high load operation.

[0085] The power module 91 is positioned above the DC disconnect switch 92 and the AC circuit breaker 93 along the height of the electrical cabinet. This facilitates wiring between the power module 91, the DC disconnect switch 92, and the AC circuit breaker 93, reduces thermal interference, improves the operational stability of the three components, and enhances the operational reliability of the electrical cabinet.

[0086] In some embodiments, such as Figure 8 As shown, the DC disconnect switch 92 and the AC circuit breaker 93 are arranged side by side along the height of the electrical cabinet, and the DC disconnect switch 92 and the AC circuit breaker 93 are located on one side of the second surface cooler 6. On the one hand, the cold air on the surface of the second surface cooler 6 can directly reach the DC disconnect switch 92 and the AC circuit breaker 93 to dissipate heat from them. On the other hand, the second fan 4 can drive the cold air on the surface of the second surface cooler 6 to reach the DC disconnect switch 92 and the AC circuit breaker 93, thereby increasing the heat dissipation effect on the DC disconnect switch 92 and the AC circuit breaker 93.

[0087] The second surface cooler 6 can be installed on the side along the height of the electrical cabinet. The second fan 4 is installed below the second surface cooler 6 or near the bottom of the second surface cooler 6 along the height of the electrical cabinet. The air outlet side of the second fan 4 faces the opposite side of the side where the second surface cooler 6 is located. Thus, the second fan 4 can drive the cold air on the surface of the second surface cooler 6 to flow along the extension direction of the side wall of the inner circulation chamber 12. This allows the low-temperature gas to enter the first part 121 after passing through the DC disconnect switch 92 and AC circuit breaker 93 in the second part 122, and then return to the surface of the second surface cooler 6 for cooling after passing through the liquid cooling radiator 5 in sequence.

[0088] In some embodiments, such as Figure 8 As shown, the input port of the DC disconnect switch 92 is located at the bottom of the inner circulation chamber 12 along the height direction. The base 14 can be provided with a DC connection port, and the connecting wire can be connected to the DC input port of the DC disconnect switch 92 from the DC connection port of the base 14, shortening the length of the connecting wire, and the base 14 can protect the connecting wire.

[0089] The output port of the DC disconnect switch 92 faces the power module 91 along the height direction, which facilitates the electrical connection between the power module 91 and the output port of the DC disconnect switch 92.

[0090] DC power is input to the upper power module 91 through the output port of DC disconnect switch 92. The power module 91 converts DC to AC, which shortens the length of the connection line, reduces the difficulty of wiring, and facilitates maintenance.

[0091] In some embodiments, such as Figure 5 and Figure 8 As shown, the output port of the AC circuit breaker 93 is located on the side wall of the inner circulation compartment 12, and the AC wiring port can be located on the side of the cabinet 1 to facilitate wiring and installation by the operator. The direction of the copper busbar can be selected, and the assembly is flexible.

[0092] The input port of the AC circuit breaker 93 is positioned above the output port of the AC circuit breaker 93 along the height direction of the electrical cabinet; the first electronic device includes a reactor 8, the input port of the reactor 8 faces the first part 121, and the output port of the reactor 8 faces the second part 122.

[0093] DC power is input to the upper part through DC isolation switch 92, and DC to AC is completed by power module 91. It is then transmitted down to reactor 8, passes through the first cavity, enters the outer circulation chamber 11, passes through reactor 8 and capacitor in the outer circulation chamber 11, passes through the second cavity, returns to AC circuit breaker 93 in inner circulation chamber 12, and finally reaches the bottom to achieve AC output.

[0094] In some embodiments, such as Figure 3 and Figure 5 As shown, the cabinet 1 also includes a top cover 15. The top cover 15, the spacer 13, and the cabinet body 17 together form an inner circulation compartment 12, as shown. Figure 11 As shown, the ends of the top cover 15 along the left and right directions are lower than the middle of the top cover 15.

[0095] In this embodiment, the top cover 15 is designed with slopes on both sides, which facilitates the smooth drainage of rainwater, reduces water accumulation on the top cover 15, and improves the safety and reliability of the electrical cabinet; and the slopes are located in the left and right directions of the top cover 15, which can reduce the drainage of water from the front of the cabinet 1.

[0096] In some embodiments, the cabinet 1 further includes a cabinet body 17, with a top cover 15 covering the top of the cabinet body 17. The top cover 15 can be opened and closed relative to the top of the cabinet body 17 to facilitate the installation of electronic devices in the inner circulation compartment 12.

[0097] In some embodiments, the cabinet 1 further includes a support member, one end of which is used to connect to the top cover 15, and the other end of which is used to connect to the cabinet body 17.

[0098] When the operator opens the cover, the two ends of the support are connected to the top cover 15 and the cabinet 17 respectively, which can support the top cover 15 so that the top cover 15 is kept open relative to the cabinet 17, reducing the shaking of the top cover 15 in the open state and facilitating manual operation.

[0099] The support component can be a pneumatic rod.

[0100] In some embodiments, the top cover 15 and the cabinet 17 may be a sealed connection.

[0101] A sealing groove is provided on one of the bottom surface of the top cover 15 and the top surface of the cabinet 17. A protrusion that matches the sealing groove is provided on one of the bottom surface of the top cover 15 and the top surface of the cabinet 17. The sealing groove and the protrusion can form a labyrinth seal, thereby increasing the protection level of the cabinet 1.

[0102] In some embodiments, such as Figure 3 and Figure 5 As shown, the cabinet 1 includes a cabinet body 17, a spacer 13, and a door 16. The spacer 13 is disposed inside the cabinet body 17 and is used to separate the inner circulation compartment 12 and the outer circulation compartment 11. The door 16 is disposed in the cabinet body 17 and can be opened and closed, and the spacer 13 is disposed opposite to the door 16.

[0103] Cabinet 17, spacer 13 and door 16 together form inner circulation compartment 12; cabinet 17 and spacer 13 together form outer circulation compartment 11.

[0104] The door 16 can be located on the front side of the cabinet 17, and the second ventilation opening 112 is located on the rear side of the cabinet 17, making it convenient for operators to open the door 16 to work on the internal circulation chamber 12.

[0105] The electrical cabinet also includes an electrical connector 94, which can be a copper busbar connector and is used for electrical connection.

[0106] The electrical connector 94 includes a first connector 941 and a second connector 942 for electrical connection. The first connector 941 is disposed in the inner circulation compartment 12 and installed on the side of the spacer 13 facing the door 16. The second connector 942 is disposed in the second electronic device 9. When the first connector 941 and the second connector 942 are in the assembled state, the projections of the first connector 941 and the second connector 942 along the arrangement direction of the door 16 and the spacer 13 at least partially overlap.

[0107] In this embodiment, the operator can pre-install the first connector 941 on one side of the spacer 13 located in the inner circulation compartment 12. The first connector 941 is positioned opposite the door 16 and can be fixed to the spacer 13 by insulating posts. The second connector 942 is pre-installed on the second electronic device 9. The operator can open the door 16 and insert the second electronic device 9 and the second connector 942 into the cabinet 17 from the front, aligning them with the first connector 941 through the front space. Bolts are installed in the overlapping area of ​​the first connector 941 and the second connector 942 to connect them. This operation is convenient, and the disassembly and assembly of the electronic device are not affected by the fixed copper busbars on the panel. Combined with the modular design, individual assembly is possible, making operation flexible.

[0108] Secondly, this application also provides an energy storage system, including the electrical cabinet in any of the above embodiments.

[0109] Energy storage systems can be used for solar power generation systems, hydropower generation systems, thermal power generation systems, wind power generation systems, etc.

[0110] According to the energy storage system provided in this application, since the electrical cabinet in any of the above embodiments is provided, the effects that the electrical cabinet in any of the above embodiments can achieve can be realized.

[0111] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electrical cabinet, characterized in that, include: The server rack forms an external circulation compartment and an internal circulation compartment; The external circulation chamber is provided with a first ventilation opening and a second ventilation opening that communicate with the outside. The external circulation chamber is also provided with a first electronic device, a first fan and a first surface cooler. The first fan is used to drive air to enter the external circulation chamber from the first ventilation opening and flow through the first surface cooler and out from the second ventilation opening. The inner circulation chamber is equipped with a second electronic device, a second fan, a liquid-cooled radiator, and a second surface cooler. The second fan is used to drive the air in the inner circulation chamber to flow through the second surface cooler. The liquid-cooled radiator is used to dissipate heat for at least part of the second electronic device. The second surface cooler and the liquid-cooled radiator are each connected to the first surface cooler through heat exchange pipes.

2. The electrical cabinet according to claim 1, characterized in that, The cabinet also includes a base, and multiple sides of the base are provided with air inlets, with the first air inlet located on the top wall of the base.

3. The electrical cabinet according to claim 1, characterized in that, The inner circulation chamber includes a first part and a second part connected together. The first part is higher than the second part and the outer circulation chamber in the height direction. The second part and the outer circulation chamber are arranged side by side in the horizontal direction. The liquid cooling radiator is arranged in the first part, and the second fan and the second surface cooler are arranged in the second part.

4. The electrical cabinet according to claim 3, characterized in that, The second vent is located on the wall of the external circulation compartment away from the second part, and the second surface cooler is located on the wall of the second part away from the external circulation compartment.

5. The electrical cabinet according to claim 3, characterized in that, The second electronic device includes a power module, a DC disconnect switch, and an AC circuit breaker. The power module is located in the first part, and the liquid-cooled heat sink is used to dissipate heat from the power module. The DC disconnect switch and the AC circuit breaker are located in the second part.

6. The electrical cabinet according to claim 5, characterized in that, The DC disconnect switch and the AC circuit breaker are arranged side by side along the height of the electrical cabinet and are located on one side of the second surface cooler.

7. The electrical cabinet according to claim 6, characterized in that, The input port of the DC disconnect switch is located at the bottom of the inner circulation compartment along the height direction, and the output port of the DC disconnect switch faces the power module along the height direction.

8. The electrical cabinet according to claim 6, characterized in that, The output port of the AC circuit breaker is located on the side wall of the inner circulation compartment, and the input port of the AC circuit breaker is located above the output port of the AC circuit breaker along the height direction of the electrical cabinet. The first electronic device includes a reactor, with the input port of the reactor facing the first portion and the output port of the reactor facing the second portion.

9. The electrical cabinet according to any one of claims 1-8, characterized in that, Along the height of the electrical cabinet, the first electronic device, the first surface cooler, and the first vent are arranged in sequence, and the first electronic device is arranged horizontally on one side of the second vent.

10. The electrical cabinet according to any one of claims 1-8, characterized in that, The cabinet includes a cabinet body, a partition, and a door. The partition is disposed inside the cabinet body and is used to separate the inner circulation compartment and the outer circulation compartment. The door is openable and closable and is disposed opposite to the cabinet body. The electrical cabinet also includes electrical connectors, which include a first connector and a second connector for electrical connection. The first connector is disposed in the inner circulation compartment and installed on the side of the spacer facing the door. The second connector is disposed in the second electronic device. When the first connector and the second connector are in the assembled state, the projections of the first connector and the second connector along the arrangement direction of the door and the spacer at least partially overlap.

11. An energy storage system, characterized in that, The electrical cabinet includes any one of claims 1-10.

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