Convergence cabinet, clamping circuit and energy storage system

Abstract

The invention is suitable for the technical field of energy storage devices, and provides a convergence cabinet, a clamping circuit and an energy storage system. The first mounting cavity is used for accommodating a current interference source and / or an electromagnetic interference source; the second mounting cavity is formed in one side of the first mounting cavity; the third mounting cavity and the first mounting cavity are respectively arranged on different sides of the second 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; one end of the clamping line is connected to the cabinet body, and the other end of the clamping line is connected between the first clamping resistor and the second clamping resistor; the energy storage system comprises a convergence cabinet; according to the confluence cabinet provided by the invention, the first mounting cavity and the third mounting cavity are separated through the second mounting cavity, so that the interference of a current interference source and an electromagnetic interference source on the control module is reduced, and the stability of the confluence cabinet is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of energy storage devices, and in particular, relates to a combiner cabinet, a clamping circuit and an energy storage system. Background Art

[0002] With the development of strategic resources and heavy industries such as big data and nuclear power, large-scale energy storage devices can serve as backup power sources to solve the problem of important equipment that cannot be powered off. At the same time, with the development of the photovoltaic and wind power industries, large-scale energy storage devices can solve the problems of photovoltaic off-grid energy storage and wind power storage, as well as the active power quality optimization and reactive power compensation problems of photovoltaic power stations. The market demand for energy storage is increasing, and the development of large-scale energy storage is becoming more and more rapid.

[0003] In a high-voltage environment, the control equipment in the current combiner cabinet is easily disturbed and malfunctions, affecting the safety and reliability of the equipment. Summary of the invention

[0004] In view of the above problems, the present application provides a combiner cabinet, a clamping circuit and an energy storage system, which can improve the problem that the control equipment in the combiner cabinet is susceptible to interference.

[0005] In a first aspect, the present application provides a combiner cabinet, comprising:

[0006] Cabinet;

[0007] A first installation cavity is formed in the cabinet and is used to accommodate a current interference source and / or an electromagnetic interference source;

[0008] A second installation cavity is formed in the cabinet and is disposed on one side of the first installation cavity;

[0009] A third installation cavity is formed in the cabinet, and the third installation cavity and the first installation cavity are respectively arranged on different sides of the second installation cavity, and the third installation cavity is used to accommodate a control module.

[0010] In the technical solution of this embodiment, a first installation cavity, a second installation cavity and a third installation cavity are arranged in the cabinet body, so that the first installation cavity accommodates the current interference source and / or the electromagnetic interference source, and the third installation cavity accommodates the control module, and the first installation cavity and the third installation cavity are arranged on both sides of the second installation cavity respectively. Such an arrangement enables the junction cabinet to separate the first installation cavity and the third installation cavity through the second installation cavity during use, thereby reducing the interference of the current interference source and the electromagnetic interference source on the control module, thereby improving the situation where the control module is interfered with and causes malfunction, and improving the service life, reliability and stability of the junction cabinet.

[0011] In some embodiments, the first installation cavity includes a first accommodation chamber and a second accommodation chamber, the first accommodation chamber is used to accommodate the current interference source, and the second accommodation chamber is used to accommodate the electromagnetic interference source.

[0012] In the technical solution of this embodiment, the first installation cavity includes a first accommodating chamber and a second accommodating chamber, so as 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 influence of the current interference source and the electromagnetic interference source on the control module.

[0013] In some embodiments, the third installation cavity includes a third accommodation chamber and a fourth accommodation chamber, and the third accommodation chamber is used to accommodate the control module;

[0014] The first accommodation chamber, the second accommodation chamber and the third accommodation chamber are respectively arranged on different sides of the second installation chamber, and the second installation chamber and the fourth accommodation chamber are respectively arranged on different sides of the third accommodation chamber;

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

[0016] In the technical solution of this embodiment, the third installation 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 installation 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 to the control module, and improving the reliability and stability of the junction cabinet.

[0017] In some embodiments, the junction cabinet has a first direction and a second direction perpendicular to each other, the first accommodating chamber, the second installation chamber and the third installation chamber are arranged in sequence along the first direction, the second accommodating chamber is arranged on the same side of the first accommodating chamber and the second installation chamber along the second direction, and the third accommodating chamber and the fourth accommodating chamber are arranged in sequence along the second direction.

[0018] The technical solution of this embodiment further separates the control module from the current interference source and the electromagnetic interference source through the second installation cavity and the fourth accommodation chamber, so as to reduce the influence of the current interference source and the electromagnetic interference source on the control module.

[0019] In some embodiments, a plurality of isolation members are disposed in the cabinet to form the first accommodation chamber, the second accommodation chamber, the second installation cavity, the third accommodation chamber and the fourth accommodation chamber.

[0020] The technical solution of this embodiment enables the isolation component to also serve the effect of isolating 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 installation cavity and the fourth accommodation chamber, the isolation component can also reduce the impact of current interference sources and electromagnetic interference sources on the control module, thereby further playing a role in protecting the control module.

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

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

[0023] In some embodiments, the material of the isolation element 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, so that the material of the isolation component can be set according to the environment in which the junction box 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, a plurality of the isolation members are connected by a connecting member, and the connecting member is a conductor.

[0026] The technical solution of this embodiment enables each isolating element to be interconnected and conductive, so that the potential on each isolating element 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 isolation members is conductively connected to the cabinet.

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

[0029] In some embodiments, a conductive structure is further provided in the cabinet, and the conductive structure is conductively connected to the cabinet or the isolation member.

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

[0031] In some embodiments, a clamping unit is accommodated in the fourth containing chamber.

[0032] The technical solution of this embodiment enables the fourth receiving chamber to separate the control module from the electromagnetic interference source, while the clamping unit will not interfere with the control module and is not easily interfered with, so as to improve the reliability and stability of the junction box and reduce the impact on the control module.

[0033] In some embodiments, an isolating switch is accommodated in the second mounting cavity.

[0034] The technical solution of this embodiment enables the second installation cavity to separate the control module from the current interference source and the electromagnetic interference source, while the isolating switch will not interfere with the control module and is not easily interfered with, so as to improve the reliability and stability of the junction box and reduce the impact on the control module.

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

[0036] The technical solution of this embodiment enables the current interference source to include secondary electrical equipment, and the electromagnetic interference source to include a power supply, so that each secondary electrical equipment and power supply can be accommodated in different accommodation rooms to reduce mutual interference, and also enables the layout of each component in the junction box to be clearer and more reasonable.

[0037] In some embodiments, the partial discharge of the isolating 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 where partial discharge occurs during the operation of the combiner cabinet, thereby further improving the safety performance of the combiner cabinet.

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

[0040] In the technical solution of this embodiment, since the devices contained in the first installation cavity and the second installation cavity generate relatively high heat, arranging the first installation cavity and the second installation cavity above the third installation 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, thereby improving the reliability and stability of the junction cabinet.

[0041] In some embodiments, a heat dissipation structure is provided on the cabinet, and the heat dissipation structure is at least opposite to the second receiving chamber and / or the second installation cavity.

[0042] In the technical solution of this embodiment, since the devices accommodated in the second accommodation chamber and the second installation cavity generate relatively high heat, the heat dissipation structure is at least opposite to the second accommodation chamber and / or the second installation cavity to better dissipate heat and prevent the temperature in the junction cabinet from being too high.

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

[0044] The technical solution of this embodiment enables the combiner cabinet to achieve cooling through natural heat dissipation, thereby improving the impact of air-cooling devices 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 placed in the third storage chamber, a cable with a shielding layer is connected to the control module, and one end of the cable can extend into the first storage chamber, the second storage chamber, the second installation cavity and the fourth storage chamber.

[0046] In the technical solution of this embodiment, the control module is connected to various components through cables, and the cables have a shielding layer to enhance the anti-interference ability of the control loop and further enhance the reliability and stability of the combiner cabinet.

[0047] In some embodiments, the cabinet body 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 devices in the first installation cavity, the second installation cavity and the third installation cavity inside the cabinet to reduce the impact of the external environment on the various components in the cabinet, and the observation window makes it convenient for the staff to check the situation inside the cabinet.

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

[0050] In the technical solution of this embodiment, by arranging an outlet structure on the cabinet, the cables in the cabinet can be extended to the outside, so as to facilitate the connection of the cabinet with other electrical devices.

[0051] In some embodiments, a hanging structure is also provided on the cabinet.

[0052] In the technical solution of this embodiment, the hoisting structure can facilitate the hoisting and transportation of the cabinet, so as to facilitate the arrangement and installation of the cabinet.

[0053] In some embodiments, a maintenance hole is further provided on the cabinet body, a cover plate is detachably mounted on the cabinet body, 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 staff to replace the components in the cabinet, and the cover plate is used to protect the components in the cabinet and reduce the impact of the external environment on the components near the maintenance hole.

[0055] In the second aspect, the present application provides a clamping circuit, which is applied to the combiner cabinet in the above embodiment, 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 the second clamping resistor or the first clamping resistor; the clamping circuit also includes a clamping line, one end of the clamping line is connected to the cabinet and the other end is connected between the first clamping resistor and the second clamping resistor. The setting of the clamping circuit enables the potential of the cabinet to be relatively fixed, so as to improve the potential drift problem that may occur during the operation of the combiner cabinet.

[0056] In a third aspect, the present application provides a high-voltage energy storage system, which includes the combiner cabinet in the above embodiment.

[0057] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

[0060] Figure 2 for Figure 1 An enlarged schematic diagram of the connections in the combiner panel is shown.

[0061] Figure 3 for Figure 1 The three-dimensional schematic diagram of the combiner cabinet is shown.

[0062] Figure 4 for Figure 1 The schematic diagram of the clamping circuit in the combiner cabinet is shown.

[0063] The meanings of the marks in the figure are:

[0064] 100. Combiner cabinet;

[0065] 10. Cabinet; 11. Isolation piece; 12. Connector; 13. Heat dissipation structure; 14. Cabinet door; 141. Observation window; 15. Outlet structure; 16. Lifting structure; 17. Maintenance hole; 171. Cover plate;

[0066] 20. First installation cavity; 21. First accommodation chamber; 22. Second accommodation chamber;

[0067] 30. A second mounting cavity;

[0068] 40. third installation cavity; 41. third accommodation chamber; 42. fourth accommodation chamber;

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

[0070] 60. Electromagnetic interference source;

[0071] 70. Control module;

[0072] 81. A first clamping resistor; 82. A second clamping resistor; 83. A clamping capacitor. DETAILED DESCRIPTION

[0073] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0075] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0076] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0077] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0078] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0079] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0080] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0081] With the development of strategic resources and heavy industries such as big data and nuclear power, large-scale energy storage devices can serve as backup power sources to solve the problem of important equipment not being able to be powered off. At the same time, with the development of the photovoltaic and wind power industries, large-scale energy storage devices can solve the problems of photovoltaic off-grid energy storage and wind power storage, as well as the optimization of active power quality and reactive power compensation in photovoltaic power stations. The market demand for energy storage is increasing, and the development of large-scale energy storage is becoming more and more rapid.

[0082] In a high-voltage environment, the control equipment in the current junction box is easily affected by the electromagnetic interference and high-frequency current interference of other devices in the cabinet. For example, the high-voltage fuses, high-voltage relays, high-voltage busbars and other devices in the junction box are prone to high-frequency current interference during the high-voltage AC current flow. For example, the power module in the junction box will generate electromagnetic interference. The above-mentioned high-frequency current interference and electromagnetic interference are easy to affect the switch control module, baseboard management control module and other secondary control and protection devices in the junction box, and cause the junction box to malfunction easily, affecting the safety of the equipment and affecting the reliability of the equipment.

[0083] Based on the above considerations, in order to solve the problem that the control equipment in the junction box is susceptible to interference, a junction box is designed, in which a first installation cavity, a second installation cavity and a third installation cavity are arranged in the cabinet body, so that the first installation cavity can accommodate a current interference source and / or an electromagnetic interference source, and the third installation cavity can accommodate a control module, and the first installation cavity and the third installation cavity are respectively arranged on both sides of the second installation cavity, that is, the first installation cavity and the third installation cavity are separated by the second installation cavity.

[0084] During use, such a junction box can separate the first installation cavity and the third installation cavity through the second installation cavity, thereby reducing the interference of current interference sources and electromagnetic interference sources on the control module, improving the situation where the control module is malfunctioned due to interference, and improving the service life, reliability and stability of the junction box.

[0085] The combiner cabinet disclosed in the embodiment of the present application can be used in various high-voltage energy storage systems. The high-voltage energy storage system can be applied to, but not limited to, the power supply side, the grid side, the user side, etc. Among them, the power supply side can include renewable energy grid connection, the grid side can include grid transmission and distribution and auxiliary services, and the user side can include households or industrial parks.

[0086] In order to illustrate the technical solution described in the present application, a high-voltage energy storage system applied to the grid side according to an embodiment of the present application is taken as an example for description below.

[0087] refer to Figure 1 A first aspect of the present application provides a combiner cabinet 100 , which includes a cabinet body 10 , a first installation cavity 20 , a second installation cavity 30 and a third installation cavity 40 .

[0088] The cabinet 10 is used to provide a basis for the formation of the first installation cavity 20, the second installation cavity 30 and the third installation cavity 40. At the same time, the cabinet 10 is also used to accommodate various electrical components, such as fuses 51, isolating switches, etc. The material of the cabinet 10 can be metal, or plastic, wood or various other materials. The shape of the cabinet 10 can be a cube, a rectangular parallelepiped, a prism, an L-shape, a U-shape or other shapes.

[0089] The first installation cavity 20, the second installation cavity 30 and the third installation cavity 40 are all formed in the cabinet 10, wherein the second installation cavity 30 is arranged on one side of the first installation cavity 20, and the third installation cavity 40 and the first installation cavity 20 are respectively arranged on different sides of the second installation cavity 30, so that the second installation cavity 30 can separate the first installation cavity 20 and the third installation cavity 40; specifically, the second installation cavity 30 can be arranged between the first installation cavity 20 and the third installation cavity 40, and the third installation cavity 40 and the first installation cavity 20 can also be respectively arranged on adjacent sides of the second installation cavity 30.

[0090] It is understandable that when the first mounting cavity 20 or the third mounting cavity 40 is an irregular shape, the first mounting cavity 20 and the third mounting cavity 40 should also be able to be arranged 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 installation cavity 20 is used to accommodate a current interference source 50 and / or an electromagnetic interference source 60, and the third installation cavity 40 is used to accommodate a control module 70. At this time, the second installation cavity 30 can make the first installation cavity 20 and the third installation cavity 40 non-adjacent to each other, so as to weaken the influence of the current interference source 50 and the electromagnetic interference source 60 in the first installation cavity 20 on the control module 70.

[0092] In some embodiments, the first installation cavity 20, the second installation cavity 30 and the third installation cavity 40 can be specific chambers, that is, a plurality of partition structures are arranged in the cabinet 10, and the first installation cavity 20, the second installation cavity 30 and the third installation cavity 40 are enclosed in the cabinet 10 by the partition structures. The partition structures can be metal partitions, plastic partitions, wooden partitions or other structures. At this time, the electrical components in the second installation cavity 30, the space in the second installation cavity 30 and the partition structures can all play a role in reducing the influence of the current interference source 50 and the electromagnetic interference source 60 in the first installation cavity 20 on the control module 70. ; In other embodiments, the first installation cavity 20, the second installation cavity 30 and the third installation cavity 40 can also be different areas of the internal space of the cabinet 10. In this case, there is no partition component between the first installation cavity 20, the second installation cavity 30 and the third installation cavity 40, and the first installation cavity 20, the second installation cavity 30 and the third installation cavity 40 are only determined according to the electrical components accommodated without having clear boundaries. In this case, the electrical components in the second installation cavity 30 and the space in the second installation cavity 30 can both play a role in reducing the impact of the current interference source 50 and the electromagnetic interference source 60 in the first installation cavity 20 on the control module 70.

[0093] It is understandable that, in addition to the first installation cavity 20 , the second installation cavity 30 and the third installation cavity 40 , the combiner cabinet 100 may further include other installation cavities to arrange other structures or electrical components 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. The current interference source 50 may affect the adjacent control module 70 when passing high voltage or high frequency current, 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 installation cavity 30, so that the control module 70 is not adjacent to and affected by the current interference source 50, so as to achieve the effect of reducing the impact of current interference on the control module 70.

[0095] The electromagnetic interference source 60 refers to an electrical component that may generate electromagnetic interference, such as a power module or other electrical components. The power module may generate electromagnetic waves during operation 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 installation cavity 30, so that the control module 70 is not adjacent to the electromagnetic interference source 60 to reduce the impact on the control module 70, so as to achieve the effect of reducing the impact of electromagnetic interference on the control module 70.

[0096] In this embodiment, the first installation cavity 20 and the third installation cavity 40 are separated by the second installation cavity 30, thereby reducing the influence 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 interfered with and causing malfunction, and improving the service life, reliability and stability of the junction box 100.

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

[0098] The first accommodating chamber 21 and the second accommodating chamber 22 are both formed in the first installation cavity 20. In some embodiments, the first accommodating chamber 21 and the second accommodating chamber 22 may 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 enclosed in the cabinet 10 by the partition structure. The partition structure may be a metal partition, a plastic partition, a wooden partition or other structures.

[0099] It can be understood that, in addition to the first accommodation chamber 21 and the second accommodation chamber 22 , the first installation cavity 20 can also form more different accommodation chambers through partition structures to meet the functional requirements of the combiner cabinet 100 .

[0100] In other embodiments, the first receiving chamber 21 and the second receiving chamber 22 may also be different areas of the internal space of the first installation cavity 20. In this case, there is no partition component between the first receiving chamber 21 and the second receiving chamber 22, and the first receiving chamber 21 and the second receiving chamber 22 are only determined according to the electrical components accommodated without having a clear boundary.

[0101] The first receiving chamber 21 and the second receiving chamber 22 may be adjacent to each other or spaced apart. Other structures or other electrical components may be disposed between the first receiving chamber 21 and the second receiving chamber 22 to separate the first receiving chamber 21 and the second receiving chamber 22 and reduce mutual influence between the current interference source 50 and the electromagnetic interference source 60.

[0102] In this embodiment, the first installation cavity 20 includes a first accommodating chamber 21 and a second accommodating chamber 22 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 influence 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 installation cavity 40 includes a third accommodating chamber 41 and a fourth accommodating chamber 42 . The third accommodating chamber 41 is used to accommodate the control module 70 . At this time, the fourth accommodating chamber 42 can also play an isolation role to protect the control module 70 in the third accommodating chamber 41 .

[0104] The first accommodating chamber 21, the second accommodating chamber 22 and the third accommodating chamber 41 are respectively arranged on different sides of the second installation chamber 30, and the second installation chamber 30 and the fourth accommodating chamber 42 are respectively arranged on different sides of the third accommodating chamber 41; the third accommodating chamber 41 and the second accommodating chamber 22 are respectively arranged on different sides of the fourth accommodating chamber 42, or the third accommodating chamber 41 and the first accommodating chamber 21 are respectively arranged on different sides of the fourth accommodating chamber 42.

[0105] The third accommodating chamber 41 and the fourth accommodating chamber 42 are both formed in the second installation cavity 30. In some embodiments, the third accommodating chamber 41 and the fourth accommodating chamber 42 may 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 enclosed in the cabinet 10 by the partition structure. The partition structure may be a metal partition, a plastic partition, a wooden partition or other structures.

[0106] It can be understood that, in addition to the third accommodation chamber 41 and the fourth accommodation chamber 42 , the second installation cavity 30 can also form more different accommodation chambers through partition structures to meet the functional requirements of the combiner cabinet 100 .

[0107] In other embodiments, the third accommodating chamber 41 and the fourth accommodating chamber 42 may also be different areas of the internal space of the second installation cavity 30. In this case, there is no partition component 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 only determined according to the electrical components accommodated without having a clear boundary.

[0108] The third holding chamber 41 and the fourth holding chamber 42 may be adjacent to each other or spaced apart. Other structures or other electrical components may be disposed between the third holding chamber 41 and the fourth holding chamber 42 to separate the third holding chamber 41 and the fourth holding chamber 42 and reduce mutual influence between the current interference source 50 and the electromagnetic interference source 60.

[0109] The different sides of the second installation cavity 30 refer to three different directions of the second installation cavity 30. The first accommodating chamber 21, the second accommodating chamber 22 and the third accommodating chamber 41 are respectively arranged on different sides of the second installation 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 installation cavity 30 are all different.

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

[0111] According to the relative positions of the first holding chamber 21, the second holding chamber 22 and the third holding chamber 41, the fourth holding chamber 42 can be arranged on one side of the first holding chamber 21 and the third holding chamber 41, that is, at this time, the first holding chamber 21 and the third holding chamber 41 are arranged on different sides of the fourth holding chamber 42, and the fourth holding chamber 42 can separate the first holding chamber 21 from the third holding chamber 41; the fourth holding chamber 42 can also be arranged on one side of the second holding chamber 22 and the third holding chamber 41, that is, at this time, the second holding chamber 22 and the third holding chamber 41 are arranged on different sides of the fourth holding chamber 42, and the fourth holding chamber 42 can separate the second holding chamber 22 from the third holding chamber 41.

[0112] Affected by the size of the internal space of the cabinet 10 and the electrical components, the first storage chamber 21 and the second storage chamber 22 cannot both be arranged on the side opposite to the second installation chamber 30 and the third storage chamber 41. In some embodiments, the first storage chamber 21 and the third storage chamber 41 are respectively arranged on the opposite sides of the second installation chamber 30, and the second storage chamber 22 is adjacent to the first storage chamber 21 and the third storage chamber 41. In this case, the fourth storage chamber 42 is arranged on one side of the second storage chamber 22 and the third storage chamber 41, so that the second storage chamber 22 and the third storage chamber 41 are respectively located on different sides of the fourth storage chamber 42. side, so as to separate the second accommodating chamber 22 and the third accommodating chamber 41 by the fourth accommodating chamber 42; in other embodiments, the second accommodating chamber 22 and the third accommodating chamber 41 are respectively arranged on opposite sides of the second installation cavity 30, and the first accommodating chamber 21 is adjacent to the first accommodating chamber 21 and the third accommodating chamber 41. At this time, the fourth accommodating chamber 42 is arranged on one side of the first accommodating chamber 21 and the third accommodating chamber 41, so that the first accommodating chamber 21 and the third accommodating chamber 41 are respectively located on different sides of the fourth accommodating chamber 42, so as to separate the first accommodating chamber 21 and the third accommodating chamber 41 by the fourth accommodating chamber 42.

[0113] Affected by the internal space of the cabinet body 10 and the size of the electrical components, the first accommodating chamber 21 and the second accommodating chamber 22 cannot both be arranged on the side opposite to the second installation cavity 30 and the third accommodating chamber 41. Therefore, the fourth accommodating chamber 42 is arranged in this embodiment, and the fourth accommodating chamber 42 and the second installation cavity 30 are arranged on different sides of the third accommodating chamber 41. The fourth accommodating chamber 42 and the second installation cavity 30 are respectively isolated from interference from two different directions, thereby further protecting the control module 70 and improving the reliability and stability of the junction cabinet 100.

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

[0115] The first accommodating chamber 21, the second installation chamber 30 and the third installation chamber 40 are arranged in sequence along the first direction, and the second accommodating chamber 22 is arranged on the same side of the first accommodating chamber 21 and the second installation chamber 30 along the second direction, that is, the first accommodating chamber 21 and the third accommodating chamber 41 are respectively arranged on the opposite sides of the second installation chamber 30, and the second accommodating chamber 22 and the third accommodating chamber 41 are respectively located on the two sides adjacent to the second installation chamber 30; the third accommodating chamber 41 and the fourth accommodating chamber 42 are arranged in sequence along the second direction.

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

[0117] The arrangement of this embodiment further separates the control module 70 from the current interference source 50 and the electromagnetic interference source 60 through the second installation cavity 30 and the fourth accommodation chamber 42 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, a plurality of isolation members 11 are provided in the cabinet 10 to form a first accommodating chamber 21, a second accommodating chamber 22, a second installation cavity 30, a third accommodating chamber 41 and a fourth accommodating chamber 42, that is, the isolation members 11 can enclose various accommodating chambers and installation cavities in the cabinet 10 to form the first accommodating chamber 21, the second accommodating chamber 22, the second installation cavity 30, the third accommodating chamber 41 and the fourth accommodating chamber 42; the isolation members 11 can also provide a fixed foundation for electrical components in various accommodating chambers and installation cavities.

[0119] The spacer 11 may be a straight plate-shaped member, or a curved surface-shaped member, a special-shaped member, or a member of other shapes; the spacer 11 may be made of metal, plastic, wood, or other materials.

[0120] In addition to forming various accommodating chambers and installation cavities, the isolation member 11 can also separate the control module 70 from the current interference source 50 and the electromagnetic interference source 60. That is, in the technical solution in this embodiment, in addition to the second installation cavity 30 and the fourth accommodating chamber 42, the isolation member 11 can also reduce the impact 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 isolation member 11 is made of metal material, which has good supporting 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 isolation member 11 specifically includes at least one of steel, aluminum, and copper, wherein steel plates, aluminum plates, and copper plates all have good electromagnetic shielding properties and can have different performances when shielding electromagnetic waves of different frequencies, that is, the material of the isolation member 11 can be selected according to the specific application scenario of the junction cabinet 100.

[0123] It can be understood that a threading hole can be provided on the isolation member 11 so that the electrical components in different accommodation chambers or installation cavities can be connected via cables.

[0124] refer to Figure 2 In one embodiment, a plurality of isolators 11 are connected by a connector 12, and the connector 12 is a conductor. The connector 12 may be a cable or other structural member with conductive capability.

[0125] It can be understood that when the connecting member 12 is a cable, a wiring terminal 53 can be set on the isolating member 11 to facilitate cable connection; when the connecting member 12 is other conductive structural members, the connection of the structural members can be shielded when the isolating member 11 is powder sprayed, so as to facilitate the connection between the structural member and the isolating member 11 and conduct the corresponding isolating member 11.

[0126] This embodiment enables the isolation members 11 to be mutually conductive, so that the potentials on the isolation members 11 are the same, thereby improving the situation of potential drift that may occur in the cabinet 10 in a high-voltage operating environment.

[0127] In some embodiments, at least one isolation member 11 is conductively connected to the cabinet 10 .

[0128] Conductive connection means that the cabinet 10 can be electrically connected to the isolating member 11 and can have the same electric potential. Specifically, the cabinet 10 and the isolating member 11 can be connected via the connecting member 12 so that the cabinet 10 and the isolating member 11 have the same electric potential. Alternatively, the isolating member 11 can be directly connected to the cabinet 10, and the connection between the isolating member 11 and the cabinet 10 can be shielded during powder spraying or other insulation treatment to facilitate conduction between the isolating member 11 and the cabinet 10.

[0129] Since multiple isolation members 11 are connected through the connector 12 and the potential of the multiple isolation members 11 is the same, connecting one isolation member 11 to the cabinet 10 through the connector 12 can make the potential of the cabinet 10 and the isolation member 11 the same; it is understandable that multiple isolation members 11 can also be connected to the cabinet 10 through the connector 12 respectively.

[0130] In some embodiments, a conductive structure (not shown in the figure) is further disposed in the cabinet 10 , and the conductive structure is conductively connected to the cabinet 10 or the isolation member 11 .

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

[0132] Conductive connection means that the conductive structure can be electrically connected to the isolating member 11 or the cabinet 10 and can have the same electric potential. Specifically, the conductive structure and the isolating member 11 or the cabinet 10 can be connected by the connecting member 12 so that the conductive structure and the cabinet 10 and the isolating member 11 have the same electric potential. The conductive structure can also be directly connected to the cabinet 10 or the isolating member 11, and the connection between the conductive structure and the isolating member 11 or the cabinet 10 can be shielded during powder spraying or other insulation treatment to facilitate conductivity between the conductive structure and the cabinet 10 or the isolating member 11.

[0133] In addition to the isolating member 11, there may be conductive components such as brackets and fan casings suspended relative to the cabinet 10 or the isolating member 11 in the cabinet 10, and the potential between the cabinet 10 and the isolating member 11 is the same. Therefore, in this embodiment, the conductive structural members in the cabinet 10 are connected to the cabinet 10 or the isolating member 11, so that the various conductive structural members in the cabinet 10 can also have the same potential as the isolating member 11 and the cabinet 10, so as to further improve the potential drift that may occur in the cabinet 10 in a high-voltage operating environment.

[0134] refer to Figure 1 In one embodiment, a clamping unit is disposed in the fourth receiving chamber 42 , and the clamping unit is used to fix the potential on the cabinet 10 to improve the situation where a floating potential is formed on the cabinet 10 or the isolation member 11 and partial discharge occurs.

[0135] Since the fourth storage chamber 42 is adjacent to the second storage chamber 22, the electrical components in the fourth storage chamber 42 need to have strong anti-interference ability. The clamping unit has strong anti-interference ability and is less affected by electromagnetic interference and current interference on the junction cabinet 100. Therefore, the clamping unit is arranged in the fourth storage chamber 42 to fully utilize the internal space of the junction cabinet 100 and reduce the impact of electromagnetic interference and current interference on the control module 70.

[0136] Because the fourth storage chamber 42 is adjacent to the third storage chamber 41, the electrical components in the fourth storage chamber 42 need to have lower electromagnetic interference or current interference, and the clamping unit will not interfere with the control module 70 in the third storage chamber 41 or the interference is relatively small. Therefore, the clamping unit is arranged in the fourth storage chamber 42 to fully utilize the internal space of the junction cabinet 100.

[0137] Because the second receiving chamber 22 contains the electromagnetic interference source 60, the configuration of this embodiment enables the fourth receiving chamber 42 to separate the control module 70 from the electromagnetic interference source 60, and the clamping unit will not interfere with the control module 70 and is not easily interfered with, so as to improve the reliability and stability of the junction box 100, while reducing the impact on the control module 70.

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

[0139] Since the second installation cavity 30 is adjacent to the first accommodating chamber 21 and the second accommodating chamber 22, the electrical components in the second installation cavity 30 need to have strong anti-interference ability. The isolating switch has strong anti-interference ability and is less affected by electromagnetic interference and current interference on the junction cabinet 100. Therefore, the isolating switch is arranged in the second installation cavity 30 to make full use of the internal space of the junction cabinet 100 and reduce the impact of electromagnetic interference and current interference on the control module 70.

[0140] Since the second installation cavity 30 is adjacent to the third storage chamber 41, it is necessary to make the electrical components in the second installation cavity 30 have lower electromagnetic interference or current interference, and the isolating switch will not interfere with the control module 70 in the third storage chamber 41 or the interference is relatively small. Therefore, the isolating switch is arranged in the second installation cavity 30 to make full use of the internal space of the junction cabinet 100.

[0141] Since 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 of this embodiment enables the second installation cavity 30 to separate the control module 70 from the current interference source 50 and the electromagnetic interference source 60, and the isolating switch will not interfere with the control module 70 and is not easily interfered with, so as to improve the reliability and stability of the junction cabinet 100, while 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 53, and the electromagnetic interference source 60 includes a power supply. Since high-voltage and high-frequency secondary devices are prone to current interference, the fuse 51, relay 52 and terminal 53 in the first containing chamber 21 should all be high-voltage devices.

[0143] The fuse 51 in this embodiment 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 an isolation function, and the terminal 53 is used to achieve electrical connection; the fuse 51, the relay 52 and the terminal 53 can all be selected according to the needs of the combiner cabinet 100 or the needs of the specific energy storage system in which the combiner cabinet 100 is located.

[0144] In this embodiment, the current interference source 50 includes a secondary electrical device, and the electromagnetic interference source 60 includes a power supply, so that each secondary electrical device and power supply can be accommodated in different accommodation rooms to reduce mutual interference, and also make the layout of each component in the combiner cabinet 100 clearer and more reasonable.

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

[0146] In this embodiment, the partial discharge amount of the isolating switch, the power supply and the cabinet 10 can be obtained by performing a partial discharge test before leaving the factory, for example, performing an isolation withstand voltage test of the AC power frequency for 1 minute on the product to be tested, specifically, at 1.2 times the rated voltage of the product to be tested, the pulse is greater than or equal to 300pC / min for no more than 3 times; thereafter, the pulse is greater than or equal to 500pC / min for no more than 1.5 times; the pulse is greater than or equal to 1000pC / min for no more than 0.5 times; the pulse is greater than or equal to 2000pC / min for no more than 0.3 times; so that the partial discharge amount of the isolating switch, the power supply and the cabinet 10 at 1.1 times the rated voltage is less than or equal to 10pC.

[0147] This configuration improves the situation where partial discharge occurs during the operation of the combiner cabinet 100 , thereby further improving the safety performance of the combiner cabinet 100 .

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

[0149] Since the second installation cavity 30 contains an isolating switch and the second storage chamber 22 contains a power supply, and the isolating switch and the power supply are high-heat generating devices, and since hot air will move in the direction away from gravity compared to cold air, the first installation cavity 20 and the second installation cavity 30 are arranged above the third installation cavity 40 along the direction of gravity. This can enable the hot air generated by the second installation cavity 30 and the second storage chamber 22 to move upward, thereby reducing the impact of the hot air on the electrical components in the third installation cavity 40, thereby reducing the impact of the hot air on the control module 70, thereby reducing 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, thereby improving the reliability and stability of the junction cabinet 100.

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

[0151] The heat dissipation structure 13 may be a heat dissipation hole opened in the cabinet 10 to dissipate heat naturally through air circulation. The heat dissipation structure 13 may also be an air cooling component, a water cooling component or other heat dissipation devices or structures.

[0152] The heat dissipation structure 13 can be arranged only on one side of the second accommodating chamber 22 or the second installation cavity 30, or can be arranged on one side of the second accommodating chamber 22 and the second installation cavity 30 at the same time. Since the heat generated by the second accommodating chamber 22 and the second installation cavity 30 is relatively large, arranging the heat dissipation structure 13 on one side of the second accommodating chamber 22 and / or the second installation cavity 30 can achieve a targeted heat dissipation effect; optionally, the heat dissipation structure 13 can also be arranged on one side of the first installation cavity 20, the second installation cavity 30 and the third installation cavity 40 at the same time, that is, the heat dissipation structure 13 can also dissipate heat for the electrical components in the first installation cavity 20, the second installation cavity 30 and the third installation cavity 40, so as to further reduce the temperature in the cabinet 10.

[0153] The heat dissipation structure 13 is used to discharge the hot air in the cabinet 10 to the outside, thereby reducing the temperature in the cabinet 10 to improve the situation where the electrical components in the cabinet 10 run for a long time in a high temperature environment and cause failure. Since the devices accommodated in the second receiving chamber 22 and the second installation cavity 30 generate a high amount of heat, the heat dissipation structure 13 is at least opposite to the second receiving chamber 22 and the second installation cavity 30 to better play a heat dissipation role and prevent the temperature in the junction cabinet 100 from being too high.

[0154] In some embodiments, the heat dissipation structure 13 includes a plurality of heat dissipation holes opened on the cabinet 10, and the heat dissipation holes can connect the second receiving chamber 22 and the second installation chamber 30 opposite thereto with the outside world and realize natural cooling through air circulation; the plurality of heat dissipation holes can also connect the first receiving chamber 21, the second receiving chamber 22, the second installation chamber 30, the third receiving chamber 41, and the fourth receiving chamber 42 with the outside world to further enhance air circulation and improve the heat dissipation effect.

[0155] The shape of the heat dissipation hole can be circular, square or other shapes; the heat dissipation hole can also be opened on the top surface, side surface, bottom surface or any other surface or multiple surfaces of the cabinet 10; the heat dissipation holes can be evenly spaced and arranged to form an entire heat dissipation area, and the heat dissipation holes can also be scattered on any surface of the cabinet 10.

[0156] The cabinet 10 is mostly cooled by fans, and the installation of fans in the junction cabinet 100 will cause a large number of floating metal devices to appear in the cabinet 10, which may easily lead to unstable potential or generate floating potential, thereby easily causing local discharge. In this embodiment, natural heat dissipation through heat dissipation holes is adopted, and the heat dissipation holes are arranged opposite to the high-heat second receiving chamber 22 and the second installation cavity 30 to meet the heat dissipation requirements, thereby improving the reliability and stability of the cabinet 10 and reducing the heat dissipation cost.

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

[0158] The shielding layer of the cable may be formed by weaving a large number of shielding wires, the shielding layer of the cable may be formed by polyester film coated with aluminum foil, or the shielding layer of the cable may be other structures with anti-interference capabilities.

[0159] The shielding layer of the cable can reduce the impact of electromagnetic interference and current interference on the cable to enhance the anti-interference capability of the control loop, thereby 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, a cabinet door 14 is rotatably provided on the cabinet body 10 , and an observation window 141 is provided on the cabinet door 14 .

[0161] The cabinet 10 in this embodiment is a cabinet-shaped component with an opening at one end. The first installation cavity 20, the second installation cavity 30 and the third installation cavity 40 are all accommodated in the cabinet 10 and connected to the outside through the opening.

[0162] The cabinet door 14 is rotatable relative to the cabinet body 10, that is, the cabinet door 14 can be closed on the cabinet body 10, and can also be opened to facilitate the operation of the staff; the cabinet door 14 can be rotatably connected to the cabinet body 10 through hinges, rotating shafts, hinges or other rotating 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 cabinet door 14 can completely close the opening when it covers 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 when the cabinet door 14 covers the cabinet body 10, part of the structure can be exposed to the outside world, so as to facilitate observation by staff or to extend cables to the outside world.

[0164] The shape of the cabinet door 14 can be square, circular or other shapes, and 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 isolation member 11, or it can be other materials. The material of the cabinet door 14 can specifically 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 the staff can observe the internal situation of the cabinet 10 through the observation window 141 when the cabinet door 14 is closed on the cabinet 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] The cabinet door 14 can protect the components in the first installation cavity 20 , the second installation cavity 30 and the third installation cavity 40 in the cabinet 10 to reduce the impact of the external environment on the components in the cabinet 10 , and the observation window 141 makes it easy for the staff to check the situation inside the cabinet 10 .

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

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

[0169] The wire outlet structure 15 can be a through hole opened in the cabinet 10, and a switch cover can be further provided on the through hole to prevent debris from falling into the cabinet 10; in some embodiments, the wire outlet structure 15 includes a through hole opened in the cabinet 10, and a switch cover is rotatably connected to the through hole, and the switch cover can cover the through hole to close the through hole. A wire threading hole with an aperture equal to the outer diameter of the corresponding cable is provided on the switch cover. When the switch cover is opened, the cable can extend to the outside through the wire threading hole. At the same time, the switch cover can also close other spaces of the through hole, thereby reducing the situation where external debris enters the cabinet 10.

[0170] In this embodiment, a wire outlet structure 15 is provided on the cabinet 10 so that the cables in the cabinet 10 can be extended to the outside, so as to facilitate the connection of the cabinet 10 with other electrical devices.

[0171] refer to Figure 3 In one embodiment, a hanging structure 16 is further provided on the cabinet 10 .

[0172] The lifting structure 16 can be a lifting ear, or a lifting climb, a lifting ring or other structure; the lifting structure 16 can be arranged on the top surface of the cabinet 10, or on the bottom surface or any side surface of the cabinet 10; there can be multiple lifting structures 16 and they can be on the same surface of the cabinet 10, and multiple lifting structures 16 can also be arranged on different surfaces of the cabinet 10 to facilitate lifting from different directions and adapt to various different spatial environments. Only one lifting structure 16 can also 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 methods; the material of the lifting structure 16 can be metal, or it can be plastic, wood or other materials; in some embodiments, there are multiple lifting structures 16 and they are all arranged 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 can facilitate the hoisting and transportation of the cabinet 10 , and facilitate the arrangement and installation of the cabinet 10 .

[0174] refer to Figure 3 In one embodiment, a maintenance hole 17 is further opened on the cabinet 10, and a cover plate 171 is detachably installed on the maintenance hole 17, and the cover plate 171 can cover the maintenance hole 17, and the cover plate 171 can close the maintenance hole 17 to reduce the situation where foreign debris enters the cabinet 10 through the maintenance hole 17.

[0175] The maintenance hole 17 can be arranged on the top surface of the cabinet 10, and can also be arranged on the bottom surface or any side surface of the cabinet 10; there can be only one maintenance hole 17, or there can be multiple maintenance holes 17. Multiple maintenance holes 17 can be arranged on different surfaces of the cabinet 10 and opposite to different installation cavities and accommodating chambers, and multiple maintenance holes 17 can also be arranged 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 arranged on the top surface of the cabinet 10.

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

[0177] In this embodiment, a maintenance hole 17 is provided to facilitate workers to replace components in the cabinet 10 , and the cover plate 171 is used to protect the components in 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 In the cabinet body 10 of the combiner cabinet 100 provided by the embodiment of the first aspect of the present application, a first installation cavity 20, a second installation cavity 30 and a third installation cavity 40 are sequentially arranged from top to bottom along the first direction, a first accommodating chamber 21 and a second accommodating chamber 22 are sequentially arranged from left to right along the second direction in the first installation cavity 20, and a third accommodating chamber 41 and a fourth accommodating chamber 42 are sequentially arranged from left to right along the second direction in the third installation cavity 40, a high-voltage fuse 51, a high-voltage relay 52 and a high-voltage terminal 53 are accommodated in the first accommodating chamber 21, a power supply is accommodated in the second accommodating chamber 22, a high-voltage isolating switch is accommodated in the second installation cavity 30, a switch control module 70 and a baseboard management control module 70 are accommodated in the third accommodating chamber 41, and a low-voltage potential resistor, a low-voltage clamping capacitor and a low-voltage secondary device are accommodated in the fourth accommodating chamber 42.

[0179] The first embodiment separates the third accommodating chamber 41 from the first accommodating chamber 21 and the second accommodating chamber 22 by the second installation cavity 30 and the fourth accommodating chamber 42, thereby improving the influence of the current interference formed by the high-voltage and high-frequency components on the control module 70, and improving the influence of the electromagnetic interference formed by the power supply on the control module 70.

[0180] In the first aspect, the embodiment arranges the first installation cavity 20 and the second installation cavity 30 with higher heat generation above the third receiving chamber 41, thereby reducing the influence of the heat generated by the first installation cavity 20 and the second installation cavity 30 on the third receiving chamber 41, so that the control module 70 can work stably for a long time.

[0181] In the first aspect, the embodiment arranges metal isolators 11 in the cabinet body 10 to enclose various accommodating chambers and installation cavities, so that the isolators 11 can also play a role in reducing current interference and electromagnetic interference. At the same time, a connector 12 is arranged to connect the various isolators 11 so that the potentials of the various isolators 11 are equal, thereby reducing the occurrence of potential drift in the junction cabinet 100 in a high-voltage operating environment.

[0182] The first embodiment limits the discharge of components such as the isolating switch, the power supply, and the cabinet 10 to reduce the occurrence of partial discharge, thereby improving the safety performance of the combiner cabinet 100.

[0183] refer to Figure 4 The second embodiment of the present application provides a clamping circuit, which is applied to the combiner cabinet 100 of the first embodiment, and is specifically applied to the clamping unit in the fourth accommodation chamber 42. The clamping circuit can reduce the potential fluctuation of metal structural parts such as the cabinet body 10 and the isolation member 11, thereby achieving the effect of fixing the potential and reducing the occurrence of potential drift in the combiner cabinet 100 in a high-voltage operating environment.

[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 to the second clamping resistor 82, the clamping capacitor 83 can be connected in parallel to the second clamping resistor 82, and the clamping capacitor 83 can also be connected in parallel to 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] The clamping line in this embodiment 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 may be the same or different.

[0186] The clamping circuit in this embodiment is connected between the positive and negative bus bars of the power supply. For example, one end of the first clamping resistor 81 is connected to the positive bus bar 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 bar.

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

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

[0189] Since most of the current combiner cabinets are low-voltage combiner cabinets, when used in high-voltage operating environments, high-voltage secondary devices will cause high-frequency current interference and electromagnetic interference to the control module. At the same time, the heat generated by electrical components such as high-voltage disconnectors will also affect the normal operation of the control module. In addition, under working conditions where some combiner cabinets cannot be grounded, the cabinet body and the metal structure inside the low-voltage combiner cabinet will also experience potential drift and partial discharge.

[0190] The combiner cabinet 100 provided in this embodiment can effectively separate the control module 70 from the current interference source 50 and the electromagnetic interference source 60, and at the same time place the control module 70 below the high-heat generating electrical components so that the control module 70 can work normally and stably for a long time; the combiner cabinet 100 provided in this embodiment can also improve the fixity of the potential of the cabinet body 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 the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A combiner cabinet, characterized in that: include: Cabinet; A first installation cavity is formed in the cabinet and is used to accommodate a current interference source and / or an electromagnetic interference source; A second installation cavity is formed in the cabinet and is disposed on one side of the first installation cavity; A third installation cavity is formed in the cabinet, and the third installation cavity and the first installation cavity are respectively arranged on different sides of the second installation cavity, and the third installation cavity is used to accommodate a control module.

2. The combiner cabinet according to claim 1, characterized in that: The first installation cavity includes a first accommodation chamber and a second accommodation chamber, the first accommodation chamber is used to accommodate the current interference source, and the second accommodation chamber is used to accommodate the electromagnetic interference source.

3. The combiner cabinet according to claim 2, characterized in that: The third installation cavity includes a third accommodation chamber and a fourth accommodation chamber, and the third accommodation chamber is used to accommodate the control module; The first accommodation chamber, the second accommodation chamber and the third accommodation chamber are respectively arranged on different sides of the second installation chamber, and the second installation chamber and the fourth accommodation chamber are respectively arranged on different sides of the third accommodation chamber; The second storage chamber and the third storage chamber are respectively arranged on different sides of the fourth storage chamber, or the first storage chamber and the third storage chamber are respectively arranged on different sides of the fourth storage chamber.

4. The combiner cabinet according to claim 3, characterized in that: The junction cabinet has a first direction and a second direction perpendicular to each other. The first accommodating chamber, the second installation chamber and the third installation chamber are arranged in sequence along the first direction. The second accommodating chamber is arranged on the same side of the first accommodating chamber and the second installation chamber along the second direction. The third accommodating chamber and the fourth accommodating chamber are arranged in sequence along the second direction.

5. The combiner cabinet according to claim 3 or 4, characterized in that: A plurality of isolation members are disposed in the cabinet to form the first accommodation chamber, the second accommodation chamber, the second installation cavity, the third accommodation chamber and the fourth accommodation chamber.

6. The combiner cabinet according to claim 5, characterized in that: The material of the isolation piece is metal material.

7. The combiner cabinet according to claim 6, characterized in that: The material of the isolation piece includes at least one of steel, aluminum and copper.

8. The combiner cabinet according to claim 6, characterized in that: The plurality of isolation members are connected via a connecting member, and the connecting member is a conductor.

9. The combiner cabinet according to claim 8, characterized in that: At least one of the isolation members is conductively connected to the cabinet.

10. The combiner cabinet according to claim 8 or 9, characterized in that: A conductive structure is also provided in the cabinet, and the conductive structure is conductively connected to the cabinet or the isolation member.

11. The combiner cabinet according to any one of claims 3 to 10, characterized in that: The fourth containing chamber contains a clamping unit.

12. The combiner cabinet according to any one of claims 3 to 11, characterized in that: The second installation cavity accommodates an isolating switch.

13. The combiner cabinet according to claim 12, characterized in that: The current interference source includes a fuse, a relay and a connection terminal, and the electromagnetic interference source includes a power supply.

14. The combiner cabinet according to claim 13, characterized in that: The partial discharge of the isolating switch, the power supply and the cabinet at 1.1 times the rated voltage is less than or equal to 10pC.

15. The combiner cabinet according to claim 12, characterized in that: The first installation cavity and the second installation cavity are arranged above the third installation cavity along the gravity direction.

16. The combiner cabinet according to claim 15, characterized in that: The cabinet is provided with a heat dissipation structure, and the heat dissipation structure is at least opposite to the second receiving chamber and / or the second installation cavity.

17. The combiner cabinet according to claim 16, characterized in that: The heat dissipation structure includes a plurality of heat dissipation holes opened in the cabinet.

18. The combiner cabinet according to any one of claims 3 to 17, characterized in that: The control module is accommodated in the third storage chamber, a cable with a shielding layer is connected to the control module, and one end of the cable can extend to the first storage chamber, the second storage chamber, the second installation cavity and the fourth storage chamber.

19. The combiner cabinet according to any one of claims 1 to 18, characterized in that: The cabinet body is rotatably connected with a cabinet door, and the cabinet door is provided with an observation window.

20. The combiner cabinet according to any one of claims 1 to 19, characterized in that: The cabinet is also provided with an outlet structure, so that cables can extend from the cabinet to the outside of the cabinet through the outlet structure.

21. The combiner cabinet according to any one of claims 1 to 20, characterized in that: The cabinet is also provided with a hanging structure.

22. The combiner cabinet according to any one of claims 1 to 21, characterized in that: The cabinet body is also provided with a maintenance hole, and a cover plate is detachably mounted on the cabinet body, and the cover plate can cover the maintenance hole.

23. A clamping circuit, characterized in that: Applied to the combiner cabinet according to any one of claims 1 to 22, the clamping circuit comprises a first clamping resistor, a second clamping resistor and a clamping capacitor, the first clamping resistor is connected in series to the second clamping resistor, and the clamping capacitor is connected in parallel to the second clamping resistor or the first clamping resistor; The clamp circuit further includes a clamp line, one end of which is connected to the cabinet and the other end of which is connected between the first clamp resistor and the second clamp resistor.

24. An energy storage system, characterized in that: It comprises the combiner cabinet as claimed in any one of claims 1 to 22.

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