Busbar cabinet, clamping circuit and energy storage system

Abstract

The application is suitable for the technical field of energy storage devices, and provides a busbar cabinet, a clamping circuit and an energy storage system. The busbar cabinet comprises: a cabinet body; a first mounting cavity for accommodating a current interference source and / or an electromagnetic interference source; a second mounting cavity arranged on one side of the first mounting cavity; and a third mounting cavity arranged on different sides of the second mounting cavity from the first mounting cavity, and the third mounting cavity is used for accommodating a control module. The clamping circuit comprises a first clamping resistor, a second clamping resistor and a clamping capacitor, the first clamping resistor is connected in series with the second clamping resistor, and the clamping capacitor is connected in parallel with the second clamping resistor or the first clamping resistor. A clamping line is connected to the cabinet body at one end and connected between the first clamping resistor and the second clamping resistor at the other end. The energy storage system comprises the busbar cabinet. The busbar cabinet provided by the application separates the first mounting cavity and the third mounting cavity through the second mounting cavity, thereby reducing the interference of the current interference source and the electromagnetic interference source on the control module, and improving the stability of the busbar cabinet.

Description

Technical Field

[0001] This application belongs to the field of energy storage device technology, and in particular relates to a combiner cabinet, clamping circuit and energy storage system. Background Technology

[0002] With the development of strategic resources such as big data and nuclear power, as well as heavy industries, large-scale energy storage devices, as backup power sources, can solve the problem of power outages for critical equipment. At the same time, with the development of the photovoltaic and wind power industries, large-scale energy storage devices can solve the problems of off-grid photovoltaic energy storage and wind power energy storage, as well as the problems of active power quality optimization and reactive power compensation in photovoltaic power plants. The market demand for energy storage is growing, and the development of large-scale energy storage is becoming increasingly rapid.

[0003] In high-voltage environments, the control equipment in current combiner cabinets is susceptible to interference and malfunctions, affecting equipment safety and reliability. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a combiner cabinet, clamping circuit, and energy storage system, which can improve the vulnerability of control equipment in the combiner cabinet to interference.

[0005] Firstly, this application provides a combiner cabinet, comprising:

[0006] Cabinet;

[0007] A first mounting cavity is formed within the cabinet and is used to accommodate current interference sources and / or electromagnetic interference sources.

[0008] The second mounting cavity is formed inside the cabinet and located on one side of the first mounting cavity;

[0009] A third mounting cavity is formed inside the cabinet, and the third mounting cavity and the first mounting cavity are respectively located on different sides of the second mounting cavity. The third mounting cavity is used to accommodate the control module.

[0010] In this embodiment, a first mounting cavity, a second mounting cavity, and a third mounting cavity are provided within the cabinet. The first mounting cavity accommodates current interference sources and / or electromagnetic interference sources, while the third mounting cavity accommodates the control module. The first and third mounting cavities are respectively positioned on opposite sides of the second mounting cavity. This arrangement allows the combiner cabinet to be separated from the first and third mounting cavities by the second mounting cavity during use, thereby reducing interference from current and electromagnetic interference sources on the control module. This improves the situation where the control module malfunctions due to interference, and enhances the lifespan, reliability, and stability of the combiner cabinet.

[0011] In some embodiments, the first mounting cavity includes a first accommodating chamber and a second accommodating chamber, the first accommodating chamber being used to accommodate the current interference source and the second accommodating chamber being used to accommodate the electromagnetic interference source.

[0012] In the technical solution of this embodiment, the first mounting cavity includes a first accommodating chamber and a second accommodating chamber to respectively accommodate the current interference source and the electromagnetic interference source, thereby reducing the mutual influence between the current interference source and the electromagnetic interference source, and reducing the impact of the current interference source and the electromagnetic interference source on the control module.

[0013] In some embodiments, the third mounting cavity includes a third receiving chamber and a fourth receiving chamber, the third receiving chamber being used to receive the control module;

[0014] The first accommodating chamber, the second accommodating chamber, and the third accommodating chamber are respectively located on different sides of the second mounting cavity, and the second mounting cavity and the fourth accommodating chamber are respectively located on different sides of the third accommodating chamber;

[0015] The second and third accommodating chambers are respectively located on different sides of the fourth accommodating chamber, or the first and third accommodating chambers are respectively located on different sides of the fourth accommodating chamber.

[0016] In the technical solution of this embodiment, the third mounting cavity includes a third accommodating chamber and a fourth accommodating chamber, and the third accommodating chamber accommodates the control module; the third accommodating chamber is separated from the first accommodating chamber and the second accommodating chamber by the second mounting cavity, and the third accommodating chamber is separated from the second accommodating chamber by the fourth accommodating chamber, thereby further reducing the interference of current interference sources and electromagnetic interference sources on the control module and improving the reliability and stability of the combiner cabinet.

[0017] In some embodiments, the junction box has a first direction and a second direction that are perpendicular to each other. The first receiving chamber, the second mounting cavity and the third mounting cavity are arranged sequentially along the first direction. The second receiving chamber is located on the same side of the first receiving chamber and the second mounting cavity along the second direction. The third receiving chamber and the fourth receiving chamber are arranged sequentially along the second direction.

[0018] The technical solution of this embodiment further isolates the control module from the current interference source and the electromagnetic interference source through the second mounting cavity and the fourth accommodating chamber, so as to reduce the impact of the current interference source and the electromagnetic interference source on the control module.

[0019] In some embodiments, the cabinet body is provided with a plurality of partitions to form a first accommodating chamber, a second accommodating chamber, a second mounting cavity, a third accommodating chamber, and a fourth accommodating chamber.

[0020] The technical solution of this embodiment enables the isolator to also isolate the control module from current interference sources and electromagnetic interference sources. That is, in the technical solution of this embodiment, in addition to the second mounting cavity and the fourth receiving cavity, the isolator can also reduce the impact of current interference sources and electromagnetic interference sources on the control module, thereby further protecting the control module.

[0021] In some embodiments, the insulating element is made of metal.

[0022] In the technical solution of this embodiment, the metal material has good electromagnetic and electric field shielding performance, so that the isolation component can better reduce the impact of current interference sources and electromagnetic interference sources on the control module, and at the same time, it can also make the cabinet have a stable structure and strength.

[0023] In some embodiments, the material of the separator includes at least one of steel, aluminum, and copper.

[0024] In the technical solution of this embodiment, steel, aluminum, and copper have different shielding effects on electric fields and electromagnetic interference generated by different current frequencies. This allows the material of the isolation component to be set according to the environment in which the combiner cabinet is located, so as to further improve the shielding performance of the isolation component, thereby further reducing the impact of current interference sources and electromagnetic interference sources on the control module and better protecting the control module.

[0025] In some embodiments, the plurality of the isolators are connected by a connector, and the connector is a conductor.

[0026] The technical solution of this embodiment enables the various isolators to be interconnected and conductive, so that the potential on each isolator is the same, thereby improving the potential drift that may occur in the cabinet in a high-voltage operating environment.

[0027] In some embodiments, at least one of the isolators is electrically connected to the cabinet.

[0028] Since the various isolators are connected by connectors and have the same potential, the technical solution of this embodiment further enables the isolators to be interconnected and conductive with the cabinet, so as to further improve the potential drift and other situations that may occur in the cabinet in a high-voltage operating environment.

[0029] In some embodiments, the cabinet body is further provided with a conductive structural component, which is electrically connected to the cabinet body or the isolation component.

[0030] Because, in addition to the isolation components, there may be conductive components such as brackets and fan housings suspended relative to the cabinet or isolation components inside the cabinet, and the cabinet and isolation components have the same potential, the technical solution of this embodiment connects the conductive structural components inside the cabinet to the cabinet or isolation components, so that the various conductive structural components inside the cabinet can also have the same potential as the isolation components and the cabinet, thereby further improving the potential drift that may occur in the cabinet in a high-voltage operating environment.

[0031] In some embodiments, the fourth accommodating chamber contains a clamping unit.

[0032] The technical solution of this embodiment enables the fourth containment chamber to isolate the control module from electromagnetic interference sources, while the clamping unit will not interfere with the control module and is not easily interfered with, thereby improving the reliability and stability of the combiner cabinet and reducing the impact on the control module.

[0033] In some embodiments, the second mounting cavity contains an isolating switch.

[0034] The technical solution of this embodiment enables the second mounting cavity to isolate the control module from current interference sources and electromagnetic interference sources, while the isolating switch will not interfere with the control module and is not easily interfered with, thereby improving the reliability and stability of the combiner cabinet and reducing the impact on the control module.

[0035] In some embodiments, the current interference source includes a fuse, a relay, and a terminal block, and the electromagnetic interference source includes a power supply.

[0036] The technical solution of this embodiment includes secondary electrical equipment as the source of current interference and power supply as the source of electromagnetic interference, so that each secondary electrical equipment and power supply can be housed in different housings to reduce mutual interference, and at the same time make the layout of each component in the combiner cabinet clearer and more reasonable.

[0037] In some embodiments, the partial discharge of the disconnecting switch, the power supply, and the cabinet at 1.1 times the rated voltage is less than or equal to 10 pC.

[0038] The technical solution of this embodiment improves the situation of partial discharge in the combiner cabinet during operation, thereby further improving the safety performance of the combiner cabinet.

[0039] In some embodiments, the first mounting cavity and the second mounting cavity are disposed above the third mounting cavity along the direction of gravity.

[0040] In the technical solution of this embodiment, since the devices contained in the first mounting cavity and the second mounting cavity both generate a high amount of heat, placing the first mounting cavity and the second mounting cavity above the third mounting cavity can reduce the impact of heat on the control module, thereby reducing the temperature of the environment in which the control module is located, so that the control module can operate normally for a long time, improving the reliability and stability of the combiner cabinet.

[0041] In some embodiments, the cabinet is provided with a heat dissipation structure, which is at least opposite to the second accommodating chamber and / or the second mounting cavity.

[0042] In the technical solution of this embodiment, since the devices contained in the second accommodating chamber and the second mounting cavity generate a lot of heat, the heat dissipation structure is at least opposite to the second accommodating chamber and / or the second mounting cavity in order to better play the role of heat dissipation and prevent the temperature inside the junction box from being too high.

[0043] In some embodiments, the heat dissipation structure includes a plurality of heat dissipation holes formed in the cabinet.

[0044] The technical solution of this embodiment enables the combiner cabinet to achieve cooling through natural heat dissipation, thereby reducing the impact of air-cooled components such as fans on the reliability and stability of the combiner cabinet and reducing heat dissipation costs.

[0045] In some embodiments, the control module is housed within the third accommodating chamber, and a shielded cable is connected to the control module, with one end of the cable extending into the first accommodating chamber, the second accommodating chamber, the second mounting cavity, and the fourth accommodating chamber.

[0046] In this embodiment, the control module is connected to each component via cables, and the cables have a shielding layer to enhance the anti-interference capability of the control circuit and further enhance the reliability and stability of the combiner cabinet.

[0047] In some embodiments, the cabinet is rotatably connected to a cabinet door, and the cabinet door is provided with an observation window.

[0048] In the technical solution of this embodiment, the cabinet door can protect the components in the first mounting cavity, the second mounting cavity and the third mounting cavity inside the cabinet, so as to reduce the impact of the external environment on the various components inside the cabinet, while the observation window makes it convenient for staff to view the situation inside the cabinet.

[0049] In some embodiments, the cabinet is further provided with a cable outlet structure, so that cables can extend from inside the cabinet to outside the cabinet through the cable outlet structure.

[0050] In the technical solution of this embodiment, by setting a cable outlet structure on the cabinet, the cables inside the cabinet can extend to the outside, so that the cabinet can be connected to other electrical devices.

[0051] In some embodiments, the cabinet is further provided with a hoisting structure.

[0052] In the technical solution of this embodiment, the hoisting structure facilitates the hoisting and transportation of the cabinet, thereby facilitating the arrangement and installation of the cabinet.

[0053] In some embodiments, the cabinet is further provided with a maintenance hole, and a cover plate is detachably installed on the cabinet, and the cover plate can cover the maintenance hole.

[0054] In the technical solution of this embodiment, a maintenance hole is provided to facilitate the replacement of components inside the cabinet by staff, and a cover plate is used to protect the components inside the cabinet and reduce the impact of the external environment on the components near the maintenance hole.

[0055] Secondly, this application provides a clamping circuit applied in the combiner cabinet of the above embodiments. The clamping circuit includes a first clamping resistor, a second clamping resistor, and a clamping capacitor. The first clamping resistor is connected in series with the second clamping resistor, and the clamping capacitor is connected in parallel with either the second clamping resistor or the first clamping resistor. The clamping circuit also includes a clamping wire, one end of which is connected to the cabinet body and the other end is connected between the first clamping resistor and the second clamping resistor. The clamping circuit enables the potential of the cabinet body to be relatively fixed, thereby improving the potential drift problem that may occur during the operation of the combiner cabinet.

[0056] Thirdly, this application provides a high-voltage energy storage system, which includes the combiner cabinet in the above embodiments.

[0057] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art 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.

[0059] Figure 1 This is a schematic diagram of the internal structure of the combiner cabinet provided in an embodiment of this application.

[0060] Figure 2 for Figure 1 An enlarged schematic diagram of the connectors in the junction box is shown.

[0061] Figure 3 for Figure 1 The diagram shows a three-dimensional representation of the combiner cabinet.

[0062] Figure 4 for Figure 1 The diagram shows the clamping circuit in the combiner cabinet.

[0063] The markings in the diagram mean:

[0064] 100. Combiner cabinet;

[0065] 10. Cabinet body; 11. Isolation components; 12. Connecting components; 13. Heat dissipation structure; 14. Cabinet door; 141. Observation window; 15. Cable exit structure; 16. Lifting structure; 17. Maintenance hole; 171. Cover plate;

[0066] 20. First mounting cavity; 21. First receiving chamber; 22. Second receiving chamber;

[0067] 30. Second mounting cavity;

[0068] 40. Third mounting cavity; 41. Third receiving chamber; 42. Fourth receiving chamber;

[0069] 50. Current interference source; 51. Fuse; 52. Relay; 53. Terminal block;

[0070] 60. Sources of electromagnetic interference;

[0071] 70. Control module;

[0072] 81. First clamping resistor; 82. Second clamping resistor; 83. Clamping capacitor. Detailed Implementation

[0073] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0074] 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 application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0075] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0076] In this document, the term "embodiment" means that a particular 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 separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0077] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0078] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0079] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0080] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0081] With the development of strategic resources such as big data and nuclear power, as well as heavy industries, large-scale energy storage devices, as backup power sources, can solve the problem of power outages for critical equipment. At the same time, with the development of the photovoltaic and wind power industries, large-scale energy storage devices can solve the problems of off-grid photovoltaic energy storage and wind power energy storage, as well as the problems of active power quality optimization and reactive power compensation in photovoltaic power plants. The market demand for energy storage is growing, and the development of large-scale energy storage is becoming increasingly rapid.

[0082] In high-voltage environments, the control equipment in current combiner cabinets is susceptible to electromagnetic interference and high-frequency current interference from other components within the cabinet. For example, high-voltage fuses, high-voltage relays, and high-voltage busbars in the combiner cabinet are prone to generating high-frequency current interference during the flow of high-voltage AC current. Furthermore, the power supply modules in the combiner cabinet can generate electromagnetic interference. Both of these high-frequency current interferences and electromagnetic interferences can easily affect secondary control and protection equipment such as the switch control module and the baseboard management control module in the combiner cabinet, leading to malfunctions, compromising equipment safety, and impacting equipment reliability.

[0083] Based on the above considerations, in order to solve the problem that the control equipment in the combiner cabinet is susceptible to interference, a combiner cabinet is designed. The cabinet is provided with a first mounting cavity, a second mounting cavity and a third mounting cavity. The first mounting cavity accommodates current interference sources and / or electromagnetic interference sources, and the third mounting cavity accommodates the control module. The first mounting cavity and the third mounting cavity are respectively located on both sides of the second mounting cavity, that is, the second mounting cavity separates the first mounting cavity and the third mounting cavity.

[0084] During use, such a combiner cabinet can separate the first and third mounting cavities through the second mounting cavity, thereby reducing the interference caused by current interference sources and electromagnetic interference sources to the control module, improving the situation where the control module malfunctions due to interference, and improving the service life, reliability and stability of the combiner cabinet.

[0085] The combiner cabinet disclosed in this application can be used in various high-voltage energy storage systems. High-voltage energy storage systems can be applied, but are not limited to, on the power supply side, grid side, user side, etc. The power supply side can include renewable energy grid connection, the grid side can include grid transmission and distribution for ancillary services, and the user side can include homes or industrial parks.

[0086] To illustrate the technical solution described in this application, the following description uses an embodiment of a high-voltage energy storage system applied to the grid side as an example.

[0087] refer to Figure 1 The first aspect of this application provides a junction box 100, which includes a cabinet body 10, a first mounting cavity 20, a second mounting cavity 30 and a third mounting cavity 40.

[0088] The cabinet 10 provides a foundation for the formation of the first mounting cavity 20, the second mounting cavity 30 and the third mounting cavity 40. The cabinet 10 also houses various electrical components, such as fuses 51 and disconnect switches. The cabinet 10 can be made of metal, plastic, wood or other materials. The shape of the cabinet 10 can be cubic, cuboid, prism, L-shaped, U-shaped or other shapes.

[0089] The first mounting cavity 20, the second mounting cavity 30, and the third mounting cavity 40 are all formed inside the cabinet 10. The second mounting cavity 30 is located on one side of the first mounting cavity 20, and the third mounting cavity 40 and the first mounting cavity 20 are respectively located on different sides of the second mounting cavity 30, so that the second mounting cavity 30 can separate the first mounting cavity 20 and the third mounting cavity 40. Specifically, the second mounting cavity 30 can be located between the first mounting cavity 20 and the third mounting cavity 40, and the third mounting cavity 40 and the first mounting cavity 20 can also be located on adjacent sides of the second mounting cavity 30.

[0090] Understandably, when the first mounting cavity 20 or the third mounting cavity 40 is irregularly shaped, the first mounting cavity 20 and the third mounting cavity 40 should also be able to be located on different sides of the second mounting cavity 30, so that the second mounting cavity 30 can separate the first mounting cavity 20 and the third mounting cavity 40.

[0091] The first mounting cavity 20 is used to accommodate the current interference source 50 and / or the electromagnetic interference source 60, and the third mounting cavity 40 is used to accommodate the control module 70. At this time, the second mounting cavity 30 can make the first mounting cavity 20 and the third mounting cavity 40 not adjacent to each other, so as to reduce the impact of the current interference source 50 and the electromagnetic interference source 60 in the first mounting cavity 20 on the control module 70.

[0092] In some embodiments, the first mounting cavity 20, the second mounting cavity 30, and the third mounting cavity 40 can be specific chambers, i.e., multiple partition structures are provided inside the cabinet 10, and the first mounting cavity 20, the second mounting cavity 30, and the third mounting cavity 40 are formed within the cabinet 10 by the partition structures. The partition structures can be metal partitions, plastic partitions, wooden partitions, or other structural components. In this case, the electrical components in the second mounting cavity 30, the space of the second mounting cavity 30, and the partition structures can all help to reduce the impact of the current interference source 50 and the electromagnetic interference source 60 in the first mounting cavity 20 on the control module 70. In other embodiments, the first mounting cavity 20, the second mounting cavity 30, and the third mounting cavity 40 may also be different areas inside the cabinet 10. In this case, there is no partition between the first mounting cavity 20, the second mounting cavity 30, and the third mounting cavity 40, and the first mounting cavity 20, the second mounting cavity 30, and the third mounting cavity 40 are determined only by the electrical components they contain and do not have clear boundaries. In this case, the electrical components in the second mounting cavity 30 and the space of the second mounting cavity 30 can both reduce the impact of the current interference source 50 and the electromagnetic interference source 60 in the first mounting cavity 20 on the control module 70.

[0093] It is understandable that, in addition to the first mounting cavity 20, the second mounting cavity 30 and the third mounting cavity 40, the combiner cabinet 100 may also include other mounting cavities to house other structures or electrical components in order to meet the functional requirements of the combiner cabinet 100.

[0094] The current interference source 50 refers to an electrical component that may generate current interference, such as a fuse 51, a relay 52, a busbar, or other electrical components. When the current interference source 50 carries high voltage or high frequency current, it will affect the adjacent control module 70, thereby affecting the normal operation of the control module 70. In this embodiment, the current interference source 50 is separated from the control module 70 by the second mounting cavity 30, so that the control module 70 and the current interference source 50 are not adjacent and are not affected, thereby reducing the impact of current interference on the control module 70.

[0095] Electromagnetic interference source 60 refers to an electrical component that may generate electromagnetic interference, such as a power supply module or other electrical components. During operation, the power supply module may generate electromagnetic waves and affect the adjacent control module 70, thereby affecting the normal operation of the control module 70. In this embodiment, the electromagnetic interference source 60 is separated from the control module 70 by the second mounting cavity 30, so that the control module 70 and the electromagnetic interference source 60 are not adjacent to each other, thereby reducing the impact on the control module 70 and achieving the effect of reducing the impact of electromagnetic interference on the control module 70.

[0096] In this embodiment, the first mounting cavity 20 and the third mounting cavity 40 are separated by the second mounting cavity 30, thereby reducing the impact of the current interference source 50 and the electromagnetic interference source 60 on the control module 70, improving the situation where the control module 70 is malfunctioning due to interference, and improving the service life, reliability and stability of the combiner cabinet 100.

[0097] refer to Figure 1 In one embodiment, the first mounting cavity 20 includes a first receiving chamber 21 and a second receiving chamber 22. The first receiving chamber 21 is used to receive the current interference source 50, and the second receiving chamber 22 is used to receive the electromagnetic interference source 60. That is, in this embodiment, the first mounting cavity 20 is provided with both the current interference source 50 and the electromagnetic interference source 60.

[0098] The first accommodating chamber 21 and the second accommodating chamber 22 are both formed within the first mounting cavity 20. In some embodiments, the first accommodating chamber 21 and the second accommodating chamber 22 can be specific chambers, that is, at least one partition structure is provided in the cabinet 10, and the first accommodating chamber 21 and the second accommodating chamber 22 are formed in the cabinet 10 by the partition structure. The partition structure can be a metal partition, a plastic partition, a wooden partition or other structural components.

[0099] Understandably, in addition to the first receiving chamber 21 and the second receiving chamber 22, the first mounting cavity 20 can also be formed into more different receiving chambers through partition structural components to meet the functional requirements of the junction box 100.

[0100] In other embodiments, the first accommodating chamber 21 and the second accommodating chamber 22 may also be different areas inside the first mounting cavity 20. In this case, there is no partition between the first accommodating chamber 21 and the second accommodating chamber 22, and the first accommodating chamber 21 and the second accommodating chamber 22 are determined only by the electrical components they contain and do not have a clear boundary.

[0101] The first accommodating chamber 21 and the second accommodating chamber 22 can be adjacent or spaced apart. Other structures or electrical components can also be installed between the first accommodating chamber 21 and the second accommodating chamber 22 to separate the first accommodating chamber 21 and the second accommodating chamber 22 and reduce the mutual influence between the current interference source 50 and the electromagnetic interference source 60.

[0102] This embodiment includes a first receiving chamber 21 and a second receiving chamber 22 in the first mounting cavity 20, so as to respectively accommodate the current interference source 50 and the electromagnetic interference source 60, thereby reducing the mutual influence between the current interference source 50 and the electromagnetic interference source 60, and reducing the impact of the current interference source 50 and the electromagnetic interference source 60 on the control module 70.

[0103] refer to Figure 1In one embodiment, the third mounting cavity 40 includes a third receiving chamber 41 and a fourth receiving chamber 42. The third receiving chamber 41 is used to receive the control module 70, and the fourth receiving chamber 42 can also play an isolation role to protect the control module 70 in the third receiving chamber 41.

[0104] The first receiving chamber 21, the second receiving chamber 22 and the third receiving chamber 41 are respectively located on different sides of the second mounting cavity 30, and the second mounting cavity 30 and the fourth receiving chamber 42 are respectively located on different sides of the third receiving chamber 41; the third receiving chamber 41 and the second receiving chamber 22 are respectively located on different sides of the fourth receiving chamber 42, or the third receiving chamber 41 and the first receiving chamber 21 are respectively located on different sides of the fourth receiving chamber 42.

[0105] The third accommodating chamber 41 and the fourth accommodating chamber 42 are both formed within the second mounting cavity 30. In some embodiments, the third accommodating chamber 41 and the fourth accommodating chamber 42 can be specific chambers, that is, at least one partition structure is provided in the cabinet 10, and the third accommodating chamber 41 and the fourth accommodating chamber 42 are formed in the cabinet 10 by the partition structure. The partition structure can be a metal partition, a plastic partition, a wooden partition or other structural components.

[0106] Understandably, in addition to including the third and fourth accommodating chambers 41 and 42, the second mounting cavity 30 can also be formed into more different accommodating chambers through partition structural components to meet the functional requirements of the junction box 100.

[0107] In other embodiments, the third accommodating chamber 41 and the fourth accommodating chamber 42 may also be different regions within the interior space of the second mounting cavity 30. In this case, there is no partition between the third accommodating chamber 41 and the fourth accommodating chamber 42, and the third accommodating chamber 41 and the fourth accommodating chamber 42 are determined only by the electrical components they contain without having a clear boundary.

[0108] The third and fourth accommodating chambers 41 and 42 can be arranged adjacently or at intervals. Other structures or electrical components can also be arranged between the third and fourth accommodating chambers 41 and 42 to separate them and reduce the mutual influence between the current interference source 50 and the electromagnetic interference source 60.

[0109] Different sides of the second mounting cavity 30 refer to three different directions of the second mounting cavity 30. The first accommodating chamber 21, the second accommodating chamber 22, and the third accommodating chamber 41 are respectively located on different sides of the second mounting cavity 30, so that the relative positions of the first accommodating chamber 21, the second accommodating chamber 22, the third accommodating chamber 41 and the second mounting cavity 30 are all different.

[0110] Different sides of the third accommodating chamber 41 refer to two different directions of the third accommodating chamber 41. The second mounting cavity 30 and the fourth accommodating chamber 42 are respectively located on different sides of the third accommodating chamber 41, so that the relative positions of the second mounting cavity 30 and the fourth accommodating chamber 42 and the third accommodating chamber 41 are different.

[0111] Depending on the relative positions of the first accommodating chamber 21, the second accommodating chamber 22, and the third accommodating chamber 41, the fourth accommodating chamber 42 can be located on one side of the first accommodating chamber 21 and the third accommodating chamber 41, that is, the first accommodating chamber 21 and the third accommodating chamber 41 are located on different sides of the fourth accommodating chamber 42, and the fourth accommodating chamber 42 can separate the first accommodating chamber 21 and the third accommodating chamber 41; the fourth accommodating chamber 42 can also be located on one side of the second accommodating chamber 22 and the third accommodating chamber 41, that is, the second accommodating chamber 22 and the third accommodating chamber 41 are located on different sides of the fourth accommodating chamber 42, and the fourth accommodating chamber 42 can separate the second accommodating chamber 22 and the third accommodating chamber 41.

[0112] Due to the limited internal space of the cabinet 10 and the size of the electrical components, the first and second accommodating chambers 21 and 22 cannot both be located on the opposite side of the second mounting cavity 30 and the third accommodating chamber 41. In some embodiments, the first and third accommodating chambers 21 and 41 are respectively located on opposite sides of the second mounting cavity 30, while the second accommodating chamber 22 is adjacent to both the first and third accommodating chambers 21 and 41. In this case, the fourth accommodating chamber 42 is located on one side of the second and third accommodating chambers 22 and 41, so that the second and third accommodating chambers 22 and 41 are respectively located in different positions of the fourth accommodating chamber 42. On one side, the second receiving chamber 22 and the third receiving chamber 41 are separated by the fourth receiving chamber 42; in other embodiments, the second receiving chamber 22 and the third receiving chamber 41 are respectively located on opposite sides of the second mounting cavity 30, and the first receiving chamber 21 is adjacent to both the first receiving chamber 21 and the third receiving chamber 41. In this case, the fourth receiving chamber 42 is located on one side of the first receiving chamber 21 and the third receiving chamber 41, so that the first receiving chamber 21 and the third receiving chamber 41 are located on different sides of the fourth receiving chamber 42, so as to separate the first receiving chamber 21 and the third receiving chamber 41 by the fourth receiving chamber 42.

[0113] Due to the limited internal space of the cabinet 10 and the size of the electrical components, the first and second accommodating chambers 21 and 22 cannot both be located on the opposite side of the second mounting cavity 30 and the third accommodating chamber 41. Therefore, this embodiment provides a fourth accommodating chamber 42, and places the fourth accommodating chamber 42 and the second mounting cavity 30 on different sides of the third accommodating chamber 41. The fourth accommodating chamber 42 and the second mounting cavity 30 isolate interference from two different directions, further protecting the control module 70 and improving the reliability and stability of the combiner cabinet 100.

[0114] refer to Figure 1In one embodiment, the combiner cabinet 100 has a first direction and a second direction that are perpendicular to each other, the first direction being... Figure 1 The direction of the Y-axis is the first direction, which is the height direction of the combiner cabinet 100, and the second direction is... Figure 1 The direction of the X-axis is the length direction of the combiner cabinet 100.

[0115] The first receiving chamber 21, the second mounting cavity 30, and the third mounting cavity 40 are arranged sequentially along the first direction. The second receiving chamber 22 is located on the same side of the first receiving chamber 21 and the second mounting cavity 30 along the second direction. That is, the first receiving chamber 21 and the third receiving chamber 41 are respectively located on opposite sides of the second mounting cavity 30, and the second receiving chamber 22 and the third receiving chamber 41 are respectively located on adjacent sides of the second mounting cavity 30. The third receiving chamber 41 and the fourth receiving chamber 42 are arranged sequentially along the second direction.

[0116] It is understandable that the first and second directions can also be other directions of the combiner cabinet 100, and are not limited to the height or length directions mentioned above.

[0117] The configuration of this embodiment further isolates the control module 70 from the current interference source 50 and the electromagnetic interference source 60 through the second mounting cavity 30 and the fourth receiving chamber 42, so as to reduce the influence of the current interference source 50 and the electromagnetic interference source 60 on the control module 70.

[0118] refer to Figure 1 In one embodiment, the cabinet 10 is provided with a plurality of isolation members 11 to form a first accommodating chamber 21, a second accommodating chamber 22, a second mounting cavity 30, a third accommodating chamber 41 and a fourth accommodating chamber 42. That is, the isolation members 11 can enclose each accommodating chamber and mounting cavity within the cabinet 10 to form the first accommodating chamber 21, the second accommodating chamber 22, the second mounting cavity 30, the third accommodating chamber 41 and the fourth accommodating chamber 42. The isolation members 11 can also provide a fixed foundation for the electrical components in each accommodating chamber and mounting cavity.

[0119] The spacer 11 can be a straight plate, a curved surface, an irregular shape, or a component of other shapes; the material of the spacer 11 can be metal, plastic, wood, or other materials.

[0120] In addition to forming various receiving chambers and mounting cavities, the isolator 11 can also isolate the control module 70 from the current interference source 50 and the electromagnetic interference source 60. That is, in the technical solution of this embodiment, in addition to the second mounting cavity 30 and the fourth receiving chamber 42, the isolator 11 can also reduce the influence of the current interference source 50 and the electromagnetic interference source 60 on the control module 70, thereby further protecting the control module 70.

[0121] In some embodiments, the isolator 11 is made of metal, which has good support performance and strength, and can also reduce electromagnetic interference and current interference that may be generated by various electrical components.

[0122] In some embodiments, the material of the isolator 11 specifically includes at least one of steel, aluminum, and copper. Steel plates, aluminum plates, and copper plates all have good electromagnetic shielding performance and can perform differently when shielding electromagnetic waves of different frequencies. That is, the material of the isolator 11 can be selected according to the specific application scenario of the combiner cabinet 100.

[0123] Understandably, wiring holes can be provided on the isolation element 11 so that electrical components in different housings or mounting cavities can be connected by cables.

[0124] refer to Figure 2 In one embodiment, multiple isolation members 11 are connected by a connector 12, and the connector 12 is a conductor. The connector 12 can be a cable or other structural member with conductive capabilities.

[0125] Understandably, when the connector 12 is a cable, a terminal block 53 can be provided on the isolator 11 to facilitate cable connection; when the connector 12 is another structural component with conductive capability, the connection point of the structural component can be shielded during the powder coating of the isolator 11 so that the structural component can be connected to the isolator 11 and the corresponding isolator 11 can be made conductive.

[0126] This embodiment enables the various isolators 11 to conduct to each other, so that the potential on each isolator 11 is the same, thereby improving the potential drift that may occur in the cabinet 10 in a high-voltage operating environment.

[0127] In some embodiments, at least one isolator 11 is electrically connected to the cabinet 10.

[0128] Conductive connection means that the cabinet 10 can be electrically connected to the isolator 11 and have the same potential. Specifically, the cabinet 10 and the isolator 11 can be connected by the connector 12 so that the cabinet 10 and the isolator 11 have the same potential. Alternatively, the isolator 11 can be directly connected to the cabinet 10, and the connection between the isolator 11 and the cabinet 10 can be shielded during powder spraying or other insulation treatment so that the isolator 11 and the cabinet 10 can be conductive.

[0129] Since multiple isolators 11 are connected by connectors 12 and the potential of multiple isolators 11 is the same, connecting one isolator 11 to the cabinet 10 through connectors 12 will make the potential of the cabinet 10 and the isolator 11 the same; it is understandable that multiple isolators 11 can also be connected to the cabinet 10 through connectors 12 respectively.

[0130] In some embodiments, the cabinet 10 is further provided with a conductive structural component (not shown in the figure), which is electrically connected to the cabinet 10 or the isolation component 11.

[0131] Conductive structural components refer to various conductive structural components such as component brackets, fan frames, door locks, and hooks installed inside the cabinet 10. The material of conductive structural components can be metal or other conductive materials. When the cabinet 10 is in a high-voltage environment, if the various conductive structural components inside the cabinet 10 are suspended relative to the cabinet 10 and the isolation component 11, a floating potential may be formed on the conductive structural components, which may cause potential drift inside the cabinet 10.

[0132] Conductive connection means that the conductive structural component can be electrically connected to the isolator 11 or the cabinet 10 and have the same potential. Specifically, the conductive structural component and the isolator 11 or the cabinet 10 can be connected by the connector 12 so that the conductive structural component, the cabinet 10, and the isolator 11 have the same potential. Alternatively, the conductive structural component can be directly connected to the cabinet 10 or the isolator 11, and the connection between the conductive structural component and the isolator 11 or the cabinet 10 can be shielded during powder spraying or other insulation treatments to facilitate conduction between the conductive structural component and the cabinet 10 or the isolator 11.

[0133] In addition to the isolator 11, the cabinet 10 may also contain conductive components such as brackets and fan housings that are suspended relative to the cabinet 10 or the isolator 11. Since the cabinet 10 and the isolator 11 have the same potential, this embodiment connects the conductive structural components inside the cabinet 10 to the cabinet 10 or the isolator 11. This allows the various conductive structural components inside the cabinet 10 to also have the same potential as the isolator 11 and the cabinet 10, thereby further improving the potential drift that may occur in the cabinet 10 under high-voltage operating conditions.

[0134] refer to Figure 1 In one embodiment, the fourth accommodating chamber 42 contains a clamping unit for fixing the potential on the cabinet 10 to improve the situation where a floating potential is formed on the cabinet 10 or the isolator 11 and partial discharge occurs.

[0135] Since the fourth accommodating chamber 42 is adjacent to the second accommodating chamber 22, the electrical components in the fourth accommodating chamber 42 need to have strong anti-interference capabilities. The clamping unit has strong anti-interference capabilities and is less affected by electromagnetic interference and current interference on the combiner cabinet 100. Therefore, the clamping unit is located in the fourth accommodating chamber 42 to make full use of the internal space of the combiner cabinet 100 and at the same time reduce the impact of electromagnetic interference and current interference on the control module 70.

[0136] Since the fourth compartment 42 is adjacent to the third compartment 41, the electrical components in the fourth compartment 42 need to have low electromagnetic interference or current interference. The clamping unit will not interfere with or will have minimal interference with the control module 70 in the third compartment 41. Therefore, the clamping unit is located in the fourth compartment 42 to make full use of the internal space of the combiner cabinet 100.

[0137] Because the second accommodating chamber 22 contains an electromagnetic interference source 60, the fourth accommodating chamber 42 is configured to isolate the control module 70 from the electromagnetic interference source 60. The clamping unit will not interfere with the control module 70 and is not easily interfered with, thereby improving the reliability and stability of the combiner cabinet 100 and reducing the impact on the control module 70.

[0138] In some embodiments, the second mounting cavity 30 contains an isolating switch.

[0139] Since the second mounting cavity 30 is adjacent to the first accommodating chamber 21 and the second accommodating chamber 22, the electrical components in the second mounting cavity 30 need to have strong anti-interference capabilities. The disconnecting switch has strong anti-interference capabilities and is less affected by electromagnetic interference and current interference on the combiner cabinet 100. Therefore, the disconnecting switch is placed in the second mounting cavity 30 to make full use of the internal space of the combiner cabinet 100 and at the same time reduce the impact of electromagnetic interference and current interference on the control module 70.

[0140] Since the second mounting cavity 30 is adjacent to the third receiving chamber 41, it is necessary to ensure that the electrical components in the second mounting cavity 30 have low electromagnetic interference or current interference. Since the disconnecting switch will not interfere with or will have minimal interference with the control module 70 in the third receiving chamber 41, the disconnecting switch is placed in the second mounting cavity 30 to make full use of the internal space of the combiner cabinet 100.

[0141] Because the first accommodating chamber 21 contains a current interference source 50 and the second accommodating chamber 22 contains an electromagnetic interference source 60, the arrangement in this embodiment enables the second mounting cavity 30 to isolate the control module 70 from the current interference source 50 and the electromagnetic interference source 60. The isolating switch will not interfere with the control module 70 and is not easily interfered with, thereby improving the reliability and stability of the combiner cabinet 100 and reducing the impact on the control module 70.

[0142] In some embodiments, the current interference source 50 includes a fuse 51, a relay 52 and a terminal block 53, and the electromagnetic interference source 60 includes a power supply. Since high-voltage and high-frequency secondary devices are prone to generating current interference, the fuse 51, relay 52 and terminal block 53 in the first accommodating chamber 21 should all be high-voltage devices.

[0143] In this embodiment, the fuse 51 is used as a short-circuit and overcurrent protector in various high and low voltage power distribution systems, control systems and electrical equipment, the relay 52 is an automatic switching element with isolation function, and the terminal block 53 is used to realize electrical connection. The fuse 51, relay 52 and terminal block 53 can be selected according to the needs of the combiner cabinet 100 or the specific energy storage system in which the combiner cabinet 100 is located.

[0144] This embodiment includes secondary electrical equipment in the current interference source 50 and power supply in the electromagnetic interference source 60, so that each secondary electrical equipment and power supply can be housed in different housings to reduce mutual interference, and at the same time make the layout of each component in the combiner cabinet 100 clearer and more reasonable.

[0145] In some embodiments, the partial discharge of the disconnecting switch, power supply, and cabinet 10 at 1.1 times the rated voltage is less than or equal to 10 pC.

[0146] In this embodiment, the partial discharge quantity of the disconnecting switch, power supply, and cabinet 10 can be obtained by performing a partial discharge test before leaving the factory. For example, the product under test is subjected to a 1-minute AC power frequency isolation withstand voltage test. Specifically, at 1.2 times the rated voltage of the product under test, pulses greater than or equal to 300 pC / min are applied no more than 3 times; then, pulses greater than or equal to 500 pC / min are applied no more than 1.5 times; pulses greater than or equal to 1000 pC / min are applied no more than 0.5 times; and pulses greater than or equal to 2000 pC / min are applied no more than 0.3 times, so that the partial discharge quantity of the disconnecting switch, power supply, and cabinet 10 at 1.1 times the rated voltage is less than or equal to 10 pC.

[0147] This feature improves the situation of partial discharge in the combiner cabinet 100 during operation, thereby further enhancing the safety performance of the combiner cabinet 100.

[0148] refer to Figure 1 In one embodiment, the first mounting cavity 20 and the second mounting cavity 30 are disposed above the third mounting cavity 40 along the direction of gravity.

[0149] Because the second mounting cavity 30 contains an isolating switch and the second receiving chamber 22 contains a power supply, and the isolating switch and power supply are high-heat-generating devices, and because hot air will move away from gravity compared to cold air, placing the first mounting cavity 20 and the second mounting cavity 30 above the third mounting cavity 40 along the direction of gravity allows the hot air generated by the second mounting cavity 30 and the second receiving chamber 22 to move upward, thereby reducing the impact of the hot air on the electrical components in the third mounting cavity 40, and thus reducing the impact of the hot air on the control module 70. This helps to lower the temperature of the environment in which the control module 70 is located, so that the control module 70 can operate normally for a long time, improving the reliability and stability of the combiner cabinet 100.

[0150] refer to Figure 3 In one embodiment, the cabinet 10 is provided with a heat dissipation structure 13, which is at least opposite to the second accommodating chamber 22 and / or the second mounting cavity 30.

[0151] The heat dissipation structure 13 can be a heat dissipation hole opened in the cabinet 10 to dissipate heat naturally by air circulation. The heat dissipation structure 13 can also be an air-cooled component, a water-cooled component, or other heat dissipation device or structure.

[0152] The heat dissipation structure 13 can be provided on only one side of the second receiving chamber 22 or the second mounting cavity 30, or it can be provided on both sides of the second receiving chamber 22 and the second mounting cavity 30. Since the heat generated by the second receiving chamber 22 and the second mounting cavity 30 is relatively large, providing the heat dissipation structure 13 on one side of the second receiving chamber 22 and / or the second mounting cavity 30 can achieve a targeted heat dissipation effect. Optionally, the heat dissipation structure 13 can also be provided on one side of the first mounting cavity 20, the second mounting cavity 30 and the third mounting cavity 40 at the same time. That is, the heat dissipation structure 13 can also dissipate heat for the electrical components in the first mounting cavity 20, the second mounting cavity 30 and the third mounting cavity 40, so as to further reduce the temperature inside the cabinet 10.

[0153] The heat dissipation structure 13 is used to exhaust the hot air inside the cabinet 10 to the outside, thereby reducing the temperature inside the cabinet 10 and improving the situation where electrical components inside the cabinet 10 fail due to long-term operation in a high-temperature environment. Since the devices contained in the second accommodating chamber 22 and the second mounting cavity 30 generate a lot of heat, the heat dissipation structure 13 is at least opposite to the second accommodating chamber 22 and the second mounting cavity 30 to better play a heat dissipation role and prevent the temperature inside the combiner cabinet 100 from being too high.

[0154] In some embodiments, the heat dissipation structure 13 includes a plurality of heat dissipation holes formed in the cabinet 10. The heat dissipation holes can connect the second accommodating chamber 22 and the second mounting cavity 30 opposite to them to the outside world and achieve natural cooling through air circulation. The plurality of heat dissipation holes can also connect the first accommodating chamber 21, the second accommodating chamber 22, the second mounting cavity 30, the third accommodating chamber 41, and the fourth accommodating chamber 42 to the outside world to further enhance air circulation and improve heat dissipation effect.

[0155] The ventilation holes can be circular, square, or other shapes; they can also be located on the top, side, bottom, or any other surface or multiple surfaces of the cabinet 10; the ventilation holes can be evenly spaced to form a whole ventilation area, or they can be scattered on any surface of the cabinet 10.

[0156] The air cooling of the cabinet 10 is mostly achieved by using a fan. However, the presence of a fan in the combiner cabinet 100 can lead to a large number of suspended metal components inside the cabinet 10, which can easily cause unstable potential or floating potential, thus making partial discharge more likely. In this embodiment, a natural heat dissipation method using heat dissipation holes is adopted, and the heat dissipation holes are positioned opposite the high-heat second accommodating chamber 22 and the second mounting cavity 30 to meet the heat dissipation requirements. This also improves the reliability and stability of the cabinet 10 and reduces the heat dissipation cost.

[0157] In one embodiment, the third accommodating chamber 41 contains a control module 70, which is connected to a cable with a shielding layer. One end of the cable can extend into the first accommodating chamber 21, the second accommodating chamber 22, the second mounting cavity 30, and the fourth accommodating chamber 42. The control module 70 can be connected to electrical components in the first accommodating chamber 21, the second accommodating chamber 22, the second mounting cavity 30, and the fourth accommodating chamber 42 via the cable.

[0158] The shielding layer of a cable can be formed by braiding a large number of shielding wires, or by coating aluminum foil with a polyester film. The shielding layer of a cable can also be other structures with anti-interference capabilities.

[0159] The cable shielding layer can reduce the impact of electromagnetic interference and current interference on the cable, thereby enhancing the anti-interference capability of the control circuit, improving the stability of communication between the control module 70 and various electrical components, and further enhancing the reliability and stability of the combiner cabinet 100.

[0160] refer to Figure 3 In one embodiment, the cabinet 10 has a rotatable cabinet door 14, and the cabinet door 14 is provided with an observation window 141.

[0161] In this embodiment, the cabinet 10 is a cabinet-shaped component with one end open. The first mounting cavity 20, the second mounting cavity 30, and the third mounting cavity 40 are all housed within the cabinet 10 and connected to the outside through the opening.

[0162] The cabinet door 14 is rotatable relative to the cabinet body 10, meaning that the cabinet door 14 can be closed to the cabinet body 10 or opened to facilitate the work of the staff; the cabinet door 14 can be rotatably connected to the cabinet body 10 through hinges, pivots, or other rotatable connection structures.

[0163] The area of ​​the cabinet door 14 can be greater than or equal to the area of ​​the opening on the cabinet body 10, so that the opening can be completely closed when the cabinet door 14 is closed on the cabinet body 10; the area of ​​the cabinet door 14 can also be smaller than the area of ​​the opening on the cabinet body 10, so that some of the structure can be exposed to the outside when the cabinet door 14 is closed on the cabinet body 10, so that staff can observe it or cables can be extended to the outside.

[0164] The cabinet door 14 can be square, round or other shapes. The shape of the cabinet door 14 can also be set according to the shape of the opening on the cabinet body 10. The material of the cabinet door 14 can be the same as the material of the cabinet body 10 or the partition 11, or it can be other materials. Specifically, the material of the cabinet door 14 can be metal, plastic, wood or other materials.

[0165] The observation window 141 can be a transparent component embedded in the cabinet door 14, so that staff can observe the inside of the cabinet 10 through the observation window 141 when the cabinet door 14 is closed to the cabinet body 10; the material of the observation window 141 can be glass, acrylic or other transparent materials; the shape of the observation window 141 can be square, round or other shapes.

[0166] Cabinet door 14 can protect the components in the first mounting cavity 20, the second mounting cavity 30 and the third mounting cavity 40 inside the cabinet 10, so as to reduce the impact of the external environment on the components inside the cabinet 10. The observation window 141 makes it easy for staff to see the situation inside the cabinet 10.

[0167] refer to Figure 3 In one embodiment, the cabinet 10 is further provided with a cable outlet structure 15 so that the cable can extend from inside the cabinet 10 to outside the cabinet 10 through the cable outlet structure 15.

[0168] The cable outlet structure 15 can be set on the top surface of the cabinet 10, or on the bottom surface or any side of the cabinet 10; there can be only one cable outlet structure 15 or multiple cable outlet structures 15, and multiple cable outlet structures 15 can be set on different surfaces of the cabinet 10 or on the same surface of the cabinet 10; in some embodiments, there are multiple structures and they are all set on the top surface of the cabinet 10.

[0169] The cable outlet structure 15 can be a through hole opened in the cabinet 10, or a switch cover can be further provided on the through hole to prevent debris from falling into the cabinet 10. In some embodiments, the cable outlet structure 15 includes a through hole opened in the cabinet 10, and a switch cover is rotatably connected in the through hole. The switch cover can close the through hole to seal the through hole. The switch cover has a through hole with a diameter equal to the outer diameter of the corresponding cable. When the switch cover is opened, the cable can extend to the outside through the through hole. At the same time, the switch cover can also seal other spaces in the through hole, thereby reducing the possibility of external debris entering the cabinet 10.

[0170] This embodiment provides a cable outlet structure 15 on the cabinet 10, allowing the cables inside the cabinet 10 to extend to the outside, so that the cabinet 10 can be connected to other electrical devices.

[0171] refer to Figure 3 In one embodiment, the cabinet 10 is also provided with a hoisting structure 16.

[0172] The lifting structure 16 can be a lifting lug, a lifting ring, or other structure; the lifting structure 16 can be located on the top surface of the cabinet 10, or on the bottom surface or any side of the cabinet 10; multiple lifting structures 16 can be provided on the same surface of the cabinet 10, or multiple lifting structures 16 can be provided on different surfaces of the cabinet 10 to facilitate lifting from different directions and adapt to various spatial environments; or only one lifting structure 16 can be provided; the lifting structure 16 can be integrally formed on the cabinet 10, or it can be fixed to the cabinet 10 by welding, bolting, or other means; the material of the lifting structure 16 can be metal, plastic, wood, or other materials; in some embodiments, there are multiple lifting structures 16, all located on the top surface of the cabinet 10.

[0173] In this embodiment, a hoisting mechanism is provided on the cabinet 10. The hoisting structure 16 facilitates the hoisting and transportation of the cabinet 10, and facilitates the arrangement and installation of the cabinet 10.

[0174] refer to Figure 3 In one embodiment, the cabinet 10 is also provided with a maintenance hole 17, and a cover plate 171 is detachably installed on the maintenance hole 17. The cover plate 171 can cover the maintenance hole 17 and close the maintenance hole 17 to reduce the possibility of external debris entering the cabinet 10 through the maintenance hole 17.

[0175] The maintenance hole 17 can be provided on the top surface of the cabinet 10, or on the bottom surface or any side of the cabinet 10; there can be only one maintenance hole 17 or multiple maintenance holes 17. Multiple maintenance holes 17 can be provided on different surfaces of the cabinet 10 and opposite to different mounting cavities or receiving chambers. Multiple maintenance holes 17 can also be provided on the same surface of the cabinet 10; the shape of the maintenance hole 17 can be circular, square or other shapes; in some embodiments, there is one maintenance hole 17 and it is provided on the top surface of the cabinet 10.

[0176] The cover plate 171 can be detachably connected to the cabinet 10 by bolts, clips or other means; the material of the cover plate 171 can be metal, plastic, wood or other materials; provided that the cover plate 171 can close the maintenance hole 17, the shape of the cover plate 171 can be adapted to the shape of the maintenance hole 17, or it can be square, round or other shapes.

[0177] This embodiment provides a maintenance hole 17 to facilitate the replacement of components inside the cabinet 10 by staff, while the cover plate 171 is used to protect the components inside the cabinet 10 and reduce the impact of the external environment on the components near the maintenance hole 17.

[0178] refer to Figures 1 to 3 The combiner cabinet 100 provided in the first aspect of this application has a first mounting cavity 20, a second mounting cavity 30 and a third mounting cavity 40 arranged sequentially from top to bottom along a first direction in the cabinet 10. The first mounting cavity 20 has a first receiving chamber 21 and a second receiving chamber 22 arranged sequentially from left to right along a second direction in the third mounting cavity 40. The third receiving chamber 40 has a third receiving chamber 41 and a fourth receiving chamber 42 arranged sequentially from left to right along a second direction in the third mounting cavity 40. The first receiving chamber 21 contains a high-voltage fuse 51, a high-voltage relay 52 and a high-voltage terminal block 53. The second receiving chamber 22 contains a power supply. The second mounting cavity 30 contains a high-voltage disconnect switch. The third receiving chamber 41 contains a switch control module 70 and a baseboard management control module 70. The fourth receiving chamber 42 contains a low-voltage potential resistor, a low-voltage clamping capacitor and a low-voltage secondary device.

[0179] The first aspect embodiment separates the third receiving chamber 41 from the first receiving chamber 21 and the second receiving chamber 22 through the second mounting cavity 30 and the fourth receiving chamber 42, thereby improving the impact of current interference generated by high voltage and high frequency devices on the control module 70 and improving the impact of electromagnetic interference generated by the power supply on the control module 70.

[0180] In the first aspect embodiment, by placing the first mounting cavity 20 and the second mounting cavity 30, which generate more heat, above the third receiving chamber 41, the impact of the heat generated by the first mounting cavity 20 and the second mounting cavity 30 on the third receiving chamber 41 is reduced, so that the control module 70 can work stably for a long time.

[0181] In the first aspect of the embodiment, metal isolators 11 are provided inside the cabinet 10 to form various accommodating chambers and mounting cavities, so that the isolators 11 can also reduce current interference and electromagnetic interference. At the same time, connectors 12 are provided to connect the various isolators 11, so that the potential of each isolator 11 is equal, thereby reducing the occurrence of potential drift in the combiner cabinet 100 in a high-voltage operating environment.

[0182] The first aspect embodiment improves the safety performance of the combiner cabinet 100 by limiting the discharge of devices such as disconnect switches, power supplies, and cabinet 10 to reduce the occurrence of partial discharge.

[0183] refer to Figure 4 The second aspect of this application provides a clamping circuit applied in the combiner cabinet 100 of the first aspect embodiment, specifically in the clamping unit within the fourth accommodating chamber 42. This clamping circuit can reduce potential fluctuations in metal structural components such as the cabinet body 10 and the isolator 11, thereby achieving a fixed potential and reducing potential drift in the combiner cabinet 100 under high-voltage operating conditions.

[0184] In this embodiment, the clamping circuit includes a first clamping resistor 81, a second clamping resistor 82, and a clamping capacitor 83. The first clamping resistor 81 is connected in series with the second clamping resistor 82, and the clamping capacitor 83 can be connected in parallel with the second clamping resistor 82, or the clamping capacitor 83 can be connected in parallel with the first clamping resistor 81. The clamping circuit also includes a clamping line, one end of which is connected to the cabinet 10 and the other end is connected between the first clamping resistor 81 and the second clamping resistor 82.

[0185] In this embodiment, the clamping line is a high-voltage cable and is used to connect the cabinet 10 between the first clamping resistor 81 and the second clamping resistor 82; the resistance value of the first clamping resistor 81 and the resistance value of the second clamping resistor 82 can be the same or different.

[0186] In this embodiment, the clamping circuit is connected between the positive and negative buses of the power supply. For example, one end of the first clamping resistor 81 is connected to the positive bus and the other end is connected to the second clamping resistor 82. One end of the second clamping resistor 82 is connected to the first clamping resistor 81 and the other end is connected to the negative bus.

[0187] Because the combiner cabinet 100 may be suspended and unable to be grounded in some high-voltage working environments, the cabinet 10 and the isolator 11 may have a floating potential and affect the reliability of the combiner cabinet 100. This embodiment fixes the potential of the cabinet 10 through a clamping circuit, thereby improving the situation of floating potential and improving the reliability and stability of the combiner cabinet 100.

[0188] A third aspect of this application provides a high-voltage energy storage system, including the combiner cabinet 100 provided in the first aspect embodiment.

[0189] Because most current combiner cabinets are low-voltage combiner cabinets, their application in high-voltage working environments will result in high-frequency current interference and electromagnetic interference from high-voltage secondary devices to the control module. At the same time, the heat generated by electrical components such as high-voltage disconnect switches will also affect the normal operation of the control module. Furthermore, in some cases where the combiner cabinet cannot be grounded, the cabinet body and the metal structure inside the cabinet will experience potential drift and partial discharge.

[0190] The combiner cabinet 100 provided in this embodiment can effectively isolate the control module 70 from the current interference source 50 and the electromagnetic interference source 60, and place the control module 70 below the high-heat electrical components, so that the control module 70 can work stably for a long time. The combiner cabinet 100 provided in this embodiment can also improve the stability of the potential of the cabinet 10, thereby improving the potential drift and further improving the reliability and stability of the combiner cabinet 100.

[0191] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A combiner cabinet, characterized in that, include: Cabinet; A first mounting cavity is formed within the cabinet and is used to accommodate a current interference source and an electromagnetic interference source. The current interference source includes a fuse, a relay, and a terminal block, and the electromagnetic interference source includes a power supply. A second mounting cavity is formed inside the cabinet and located on one side of the first mounting cavity. The second mounting cavity contains an isolating switch. A third mounting cavity is formed inside the cabinet, and the third mounting cavity and the first mounting cavity are respectively located on different sides of the second mounting cavity, so that the second mounting cavity can separate the first mounting cavity and the third mounting cavity. The third mounting cavity is used to accommodate the control module. The first mounting cavity includes a first accommodating chamber and a second accommodating chamber, wherein the first accommodating chamber is used to accommodate the current interference source and the second accommodating chamber is used to accommodate the electromagnetic interference source; The third mounting cavity includes a third accommodating chamber and a fourth accommodating chamber, wherein the third accommodating chamber is used to accommodate the control module; The first accommodating chamber, the second accommodating chamber, and the third accommodating chamber are respectively located on different sides of the second mounting cavity, and the second mounting cavity and the fourth accommodating chamber are respectively located on different sides of the third accommodating chamber; The second and third accommodating chambers are respectively located on different sides of the fourth accommodating chamber; The second mounting cavity is located above the third mounting cavity along the direction of gravity, and the first mounting cavity is located above the second mounting cavity along the direction of gravity. The cabinet is also provided with a maintenance hole located on the top surface of the cabinet. A cover plate is detachably installed on the cabinet and can cover the maintenance hole.

2. The combiner cabinet according to claim 1, characterized in that, The junction box has a first direction and a second direction that are perpendicular to each other. The first receiving chamber, the second mounting cavity and the third mounting cavity are arranged sequentially along the first direction. The second receiving chamber is located on the same side of the first receiving chamber and the second mounting cavity along the second direction. The third receiving chamber and the fourth receiving chamber are arranged sequentially along the second direction.

3. The combiner cabinet according to claim 1, characterized in that, The cabinet is equipped with multiple isolation components to form the first accommodating chamber, the second accommodating chamber, the second mounting cavity, the third accommodating chamber, and the fourth accommodating chamber.

4. The combiner cabinet according to claim 3, characterized in that, The isolation component is made of metal.

5. The combiner cabinet according to claim 4, characterized in that, The material of the isolation component includes at least one of steel, aluminum, and copper.

6. The combiner cabinet according to claim 4, characterized in that, The plurality of the isolation elements are connected by connectors, and the connectors are conductors.

7. The combiner cabinet according to claim 6, characterized in that, At least one of the isolation components is electrically connected to the cabinet.

8. The combiner cabinet according to claim 6 or 7, characterized in that, The cabinet is also equipped with a conductive structural component, which is electrically connected to the cabinet or the isolation component.

9. The combiner cabinet according to any one of claims 1-7, characterized in that, The fourth accommodating chamber contains a clamping unit.

10. The combiner cabinet according to claim 1, characterized in that, The partial discharge of the disconnecting switch, the power supply, and the cabinet at 1.1 times the rated voltage is less than or equal to 10 pC.

11. The combiner cabinet according to claim 1, characterized in that, The cabinet is provided with a heat dissipation structure, which is at least opposite to the second accommodating chamber and / or the second mounting cavity.

12. The combiner cabinet according to claim 11, characterized in that, The heat dissipation structure includes multiple heat dissipation holes formed in the cabinet.

13. The combiner cabinet according to any one of claims 1-7, characterized in that, The third accommodating chamber contains the control module, and the control module is connected to a cable with a shielding layer, one end of which can extend into the first accommodating chamber, the second accommodating chamber, the second mounting cavity, and the fourth accommodating chamber.

14. The combiner cabinet according to any one of claims 1-7, characterized in that, The cabinet is rotatably connected to a cabinet door, and the cabinet door is provided with an observation window.

15. The combiner cabinet according to any one of claims 1-7, characterized in that, The cabinet is also provided with a cable outlet structure, so that cables can extend from inside the cabinet to outside the cabinet through the cable outlet structure.

16. The combiner cabinet according to any one of claims 1-7, characterized in that, The cabinet is also equipped with a hoisting structure.

17. A clamping circuit, characterized in that, Applied in a combiner cabinet as described in any one of claims 1-16, the clamping circuit includes a first clamping resistor, a second clamping resistor, and a clamping capacitor, wherein the first clamping resistor is connected in series with the second clamping resistor, and the clamping capacitor is connected in parallel with the second clamping resistor or the first clamping resistor; The clamping circuit also includes a clamping line, one end of which is connected to the cabinet and the other end is connected between the first clamping resistor and the second clamping resistor.

18. An energy storage system, characterized in that, Includes the combiner cabinet as described in any one of claims 1-16.

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