Convergence cabinet and energy storage system

Abstract

The utility model is suitable for the technical field of energy storage, and provides a confluence cabinet and an energy storage system, and the confluence cabinet comprises a solid-state circuit breaker which comprises a switch unit and an electronic control unit; the switch unit comprises an energy storage structure connecting end and a power structure connecting end, and the energy storage structure connecting end and the power structure connecting end are used for being electrically connected with internal elements of the solid-state circuit breaker; the electronic control unit is used for disconnecting the electric connection between the energy storage structure connecting end and the power structure connecting end; according to the confluence cabinet provided by the invention, the solid-state circuit breaker is arranged in the cabinet body, and the solid-state circuit breaker is used for controlling the connection or disconnection of the circuit, so that compared with a traditional circuit breaker which controls the switch through a mechanical contact, the solid-state circuit breaker has the advantages of high switching speed, difficulty in generating an electric arc and the like; after the solid-state circuit breaker is disconnected, the situation that the voltage exceeds the breaking capacity of the solid-state circuit breaker at the disconnected position is not prone to occurring, electric arcs are not prone to being generated, and therefore the requirement of an energy storage system for rapid breaking of the circuit breaker can be met.

Description

Technical Field

[0001] The present application belongs to the field of energy storage technology, and in particular, relates to a combiner cabinet 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 not being able to be powered off. At the same time, with the development of the photovoltaic industry and the wind power industry, large-scale energy storage devices can solve the problems of photovoltaic off-grid energy storage and wind power energy storage, as well as the optimization of active power quality and reactive power compensation of photovoltaic power stations. The market demand for energy storage is increasing, and the development of large-scale energy storage equipment is becoming more and more rapid.

[0003] In the energy storage system, due to the presence of compensation devices, the voltage when the circuit breaker is disconnected will increase rapidly and exceed the breaking capacity of the circuit breaker. However, the disconnection process of the circuit breaker in the current junction box is long and the response speed is slow, which cannot meet the energy storage system's demand for fast circuit breaker disconnection. Utility Model Content

[0004] In view of the above problems, the present application provides a combiner cabinet and an energy storage system, which can alleviate the problem that the circuit breakers in the combiner cabinets currently used in the energy storage system are not easy to meet the demand for rapid disconnection.

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

[0006] A solid-state circuit breaker, the solid-state circuit breaker comprising a switch unit and an electronic control unit communicatively connected to the switch unit;

[0007] The switch unit includes an energy storage structure connection end and a power structure connection end, which are used to be electrically connected to the internal components of the solid-state circuit breaker; the electronic control unit is used to disconnect the electrical connection between the energy storage structure connection end and the power structure connection end.

[0008] In the technical solution of this embodiment, a solid-state circuit breaker is arranged in the junction box, and the solid-state circuit breaker is used to control the conduction or disconnection of the circuit. Compared with the traditional circuit breaker controlling the switch through mechanical contacts, the solid-state circuit breaker realizes electronic control of the switch unit through the control signal of the electronic control unit, which has the advantages of fast switching speed and not easy to generate arcs. The switch unit includes an energy storage structure connection end and a power structure connection end that are electrically connected to facilitate the connection of the solid-state circuit breaker with the power structure and the energy storage structure. When the solid-state circuit breaker is disconnected, the power structure will be in a state of continuous charging and easily cause the voltage of the solid-state circuit breaker to rise rapidly. After the solid-state circuit breaker is disconnected, it is not easy for the voltage at the disconnection point to exceed the breaking capacity of the solid-state circuit breaker, and it is not easy to generate arcs, thereby meeting the junction box's demand for fast disconnection of the circuit breaker.

[0009] In some embodiments, the combiner cabinet further includes a bus power supply and a redundant power supply, wherein the bus power supply is electrically connected between the main bus of the combiner cabinet and the solid-state circuit breaker, and the redundant power supply is electrically connected between the external power supply and the solid-state circuit breaker.

[0010] The technical solution of this embodiment enables the solid-state circuit breaker to be connected to the main bus of the combiner cabinet through the bus power supply. The bus power supply can convert the voltage input to the main bus of the combiner cabinet and output a voltage that meets the requirements of the solid-state circuit breaker, so that the main bus of the combiner cabinet can supply power to the solid-state circuit breaker; a redundant power supply that can supply power to the solid-state circuit breaker is also provided, and the redundant power supply is connected to an external power supply. When either the bus power supply or the external power supply fails, the other of the two can still supply power to the solid-state circuit breaker to reduce the occurrence of failure of the solid-state circuit breaker due to power supply failure.

[0011] In some embodiments, the combiner cabinet further comprises a first redundant component;

[0012] The first redundant component is electrically connected between the bus power supply and the fixed circuit breaker, and between the redundant power supply and the solid-state circuit breaker, so that both the bus power supply and the redundant power supply can supply power to the solid-state circuit breaker through the first redundant component.

[0013] In the technical solution of this embodiment, a first redundant component is provided, and the first redundant component is electrically connected to an external power supply, a bus power supply and a solid-state circuit breaker, so that both the bus power supply and the external power supply can supply power to the solid-state circuit breaker through the first redundant component. When either the bus power supply or the external power supply fails, the other of the two can still supply power to the solid-state circuit breaker, so as to reduce the occurrence of failure of the solid-state circuit breaker due to power supply failure.

[0014] In some embodiments, the combiner cabinet further includes a control component and a second redundant component;

[0015] The second redundant component is electrically connected between the bus power supply and the control component, and between the redundant power supply and the control component, so that both the bus power supply and the redundant power supply can supply power to the control component through the second redundant component.

[0016] In the technical solution of this embodiment, a second redundant component is arranged in the junction box, and the second redundant component is electrically connected to the external power supply, the bus power supply and the control component, so that the bus power supply and the external power supply can both supply power to the control component through the second redundant component. When either the bus power supply or the external power supply fails, the other one can still supply power to the control component, so as to reduce the occurrence of failure of the control component due to power supply failure.

[0017] In some embodiments, the control assembly is communicatively coupled to the solid-state circuit breaker.

[0018] In the technical solution of this embodiment, the control component is communicatively connected to the solid-state circuit breaker so that the control component can also control the state of the solid-state circuit breaker, thereby enabling both the control component and the control unit of the solid-state circuit breaker to control the circuit breaker in the solid-state circuit breaker. When either the control component or the control unit of the solid-state circuit breaker fails, the other of the two can still control the state of the circuit breaker in the solid-state circuit breaker to reduce the occurrence of failure of the solid-state circuit breaker due to control system failure.

[0019] In some embodiments, the combiner cabinet further comprises a switching power supply;

[0020] A switching power supply is provided between the control component and the second redundant component, or a switching power supply is provided between the bus power supply and the second redundant component, or between the redundant power supply and the second redundant component.

[0021] In the technical solution of this embodiment, a switching power supply is arranged in the combiner cabinet to convert the voltage of the bus power supply into the voltage required by the control component through the switching power supply, thereby meeting the voltage requirement of the control component.

[0022] In some embodiments, the junction box further includes a cabinet body, the cabinet body includes a first accommodation chamber and a second accommodation chamber, the solid-state circuit breaker is accommodated in the first accommodation chamber, and the bus power supply, redundant power supply and control components are all accommodated in the second accommodation chamber.

[0023] In the technical solution of this embodiment, a first accommodating chamber and a second accommodating chamber are arranged in the cabinet body of the junction box, and the solid-state circuit breaker is accommodated by the first accommodating chamber, and the bus power supply, redundant power supply and control component are accommodated by the second accommodating chamber; because the solid-state circuit breaker will generate more heat during operation, and the working environment temperature of the bus power supply, redundant power supply and control component should not be too high, the solid-state circuit breaker is separated from the bus power supply, redundant power supply and control component by the first accommodating chamber and the second accommodating chamber, so that the solid-state circuit breaker and the bus power supply, redundant power supply and control component are in different working spaces, thereby alleviating the negative impact of the high temperature generated by the operation of the solid-state circuit breaker on the bus power supply, redundant power supply and control component.

[0024] In some embodiments, along the direction of gravity, the first receiving chamber is arranged above the second receiving chamber.

[0025] The technical solution of this embodiment arranges the first accommodation chamber above the second accommodation chamber. Since the first accommodation chamber is used to accommodate the solid-state circuit breaker, and hot air usually rises, the first accommodation chamber is arranged above the second accommodation chamber to reduce the hot air entering the second accommodation chamber, thereby further alleviating the negative impact that the high temperature generated by the operation of the solid-state circuit breaker may have on the bus power supply, redundant power supply, and control components.

[0026] In some embodiments, the combiner cabinet further includes a fuse disposed in the cabinet body, and the fuse is electrically connected to the energy storage structure connection end of the solid-state circuit breaker.

[0027] In the technical solution of this embodiment, a fuse is provided and connected between the solid-state circuit breaker and the power module to protect the solid-state circuit breaker and other devices in the combiner cabinet. When the current in the circuit exceeds a preset value, the fuse can be blown to protect the solid-state circuit breaker and other devices in the combiner cabinet.

[0028] In some embodiments, the combiner cabinet further includes a third accommodation chamber, and the fuse is accommodated in the third accommodation chamber;

[0029] The third accommodation chamber and the first accommodation chamber are respectively arranged on two opposite sides of the second accommodation chamber.

[0030] In the technical solution of this embodiment, a third storage chamber for accommodating fuses is provided in the junction box, and the third storage chamber and the first storage chamber are respectively provided on opposite sides of the second storage chamber, so that the third storage chamber and the first storage chamber are separated by the second storage chamber to alleviate the negative impact that the first storage chamber may have on the fuse.

[0031] In some embodiments, a heat dissipation structure is provided on the cabinet, and the heat dissipation structure is at least opposite to the first receiving chamber.

[0032] In the technical solution of this embodiment, since the solid-state circuit breaker in the first accommodation chamber generates a relatively high amount of heat, the heat dissipation structure is at least opposite to the first accommodation chamber to better dissipate heat and alleviate the situation where the temperature in the junction box is too high. It can also further alleviate the negative impact that the high temperature generated by the solid-state circuit breaker at work may have on the bus power supply, redundant power supply, and control components.

[0033] In some embodiments, the heat dissipation structure includes heat dissipation holes opened in the cabinet.

[0034] The technical solution of this embodiment enables the combiner cabinet to be cooled by natural heat dissipation, thereby improving the negative impact of air-cooling devices such as fans on the reliability and stability of the combiner cabinet and reducing the heat dissipation cost.

[0035] In some embodiments, an observation window is provided on the cabinet.

[0036] In the technical solution of this embodiment, an observation window is opened on the cabinet to facilitate the staff to check the situation inside the cabinet.

[0037] In some embodiments, a cabinet door is rotatably connected to the cabinet body;

[0038] Along the direction of gravity, a shielding structure connected to the cabinet body is provided above the cabinet door, and the shielding structure protrudes from the cabinet body in a direction pointing from the cabinet body to the cabinet door.

[0039] In the technical solution of this embodiment, a cabinet door is provided to protect the devices in the first storage chamber, the second storage chamber and the third storage chamber inside the cabinet, thereby reducing the impact of the external environment on the various components in the cabinet; a shielding structure is provided above the cabinet door to reduce the occurrence of rainwater or other debris entering the interior of the cabinet through the gap of the cabinet door, thereby further reducing the impact of the external environment on the various components in the cabinet.

[0040] In a second aspect, some embodiments of the present application provide an energy storage system, including the combiner cabinet provided by some embodiments of the first aspect; and

[0041] a power module electrically connected to the solid-state circuit breaker;

[0042] A power module includes a compensation device electrically connected to a solid-state circuit breaker.

[0043] 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

[0044] 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.

[0045] Figure 1 A three-dimensional schematic diagram of a combiner cabinet provided in some embodiments of the present application.

[0046] Figure 2 A schematic diagram of electrical connections of an energy storage system provided in some embodiments of the present application.

[0047] Figure 3 A schematic diagram of the internal structure electrical connections of a combiner cabinet provided in some embodiments of the present application.

[0048] Figure 4 This is a schematic front view of a combiner cabinet with the cabinet door removed provided in some embodiments of the present application.

[0049] The meanings of the marks in the figure are:

[0050] 100. Combiner cabinet;

[0051] 10. Cabinet; 101. First storage chamber; 102. Second storage chamber; 103. Third storage chamber; 11. Heat dissipation structure; 12. Observation window; 13. Cabinet door; 14. Shielding structure;

[0052] 21. Solid-state circuit breaker; 22. Fuse; 23. Bus power supply; 24. Redundant power supply; 25. First redundant component; 26. Second redundant component; 27. Switching power supply; 28. Control component;

[0053] 200. Energy storage system;

[0054] 30. Power module; 31. Compensation device;

[0055] 40. Power module. DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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).

[0062] 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.

[0063] 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.

[0064] 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 industry and the wind power industry, large-scale energy storage devices can solve the problems of photovoltaic off-grid energy storage and wind power energy storage, as well as the optimization of active power quality and reactive power compensation 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.

[0065] In energy storage systems or high voltage conditions, a circuit breaker is usually installed in the junction box to disconnect the circuit connected to it. The circuit breaker of the junction box is usually an isolating switch, but because the isolating switch itself does not have the ability to disconnect under load, it is necessary to temporarily lock the energy storage valve through the energy storage valve control system of the energy storage system before performing the disconnection operation of the isolating switch. Although this method can meet the disconnection requirements, it increases the complexity of the control logic and design difficulty of the energy storage valve control system.

[0066] At present, there are also junction boxes that use mechanical circuit breakers. However, since mechanical circuit breakers mainly achieve the purpose of disconnection through the mechanical displacement of the moving and static contacts, and the process takes a relatively long time (usually several milliseconds), and arcs are easily generated during the mechanical displacement of the contacts. However, in high-voltage conditions, the response speed of mechanical circuit breakers usually cannot meet the disconnection requirements, and the disconnection reliability is poor. In the energy storage system, due to the presence of compensation devices (such as capacitors), the power module continues to charge the compensation device, which will cause the voltage at both ends of the compensation device to continue to increase; when the mechanical circuit breaker is disconnected, the compensation device is still in the charging state, which can easily cause the voltage at both ends of the mechanical circuit breaker to rise rapidly and exceed its breaking capacity. The time required for the voltage to rise to exceed the breaking capacity of the mechanical circuit breaker is usually in the microsecond level, that is, it is not easy for the mechanical circuit breaker to complete the disconnection before the voltage it carries exceeds the breaking capacity, and it is not easy to meet the energy storage system's demand for the breaking capacity of the circuit breaker in the junction box.

[0067] Based on the above considerations, in order to meet the energy storage system's demand for the breaking capacity of the circuit breaker in the combiner cabinet, some embodiments of the present application provide a combiner cabinet that uses a solid-state circuit breaker to electrically isolate and disconnect the circuits connected to it. Because the solid-state circuit breaker has a faster breaking speed (can reach microseconds) and is not prone to arcing or sparking, the solid-state circuit breaker can meet the demand for the breaking capacity of the combiner cabinet under high voltage conditions.

[0068] During the use of such a combiner cabinet, when the solid-state circuit breaker is disconnected, the electronic control unit can control the switch unit to disconnect through preset parameters, programs, or received signals, thereby achieving rapid disconnection in microseconds and less prone to arcing, thereby increasing the service life of the combiner cabinet, and can improve the service life, reliability and stability of the combiner cabinet.

[0069] Under high voltage conditions, solid-state circuit breakers have the ability to break on load, can achieve circuit breaking, and also have the function of arc extinguishing, thereby reducing damage to the circuit breaker; in the energy storage system, although the compensation device will cause the voltage of the solid-state circuit breaker to rise rapidly, the solid-state circuit breaker has a fast response speed and can complete the breaking action before the voltage exceeds its breaking capacity. After the solid-state circuit breaker is opened, it is not easy for the voltage at the disconnection point to exceed the load capacity of the solid-state circuit breaker, and arcing is not easy to occur.

[0070] 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.

[0071] For the convenience of description, the following embodiments are described by taking an embodiment of the present application in which a combiner cabinet 100 is applied to a high-voltage energy storage system on the grid side as an example.

[0072] In a first aspect, some embodiments of the present application provide a combiner cabinet 100, referring to Figure 1 , Figure 2 , Figure 3 ,in, Figure 1 This is a three-dimensional schematic diagram of a combiner cabinet 100 provided in some embodiments of the present application. Figure 2 The electrical connection diagram of the combiner cabinet 100 and the connected power module 30 and power supply module 40 provided in some embodiments of the present application is as follows: Figure 3 A schematic diagram of the internal structure and electrical connections of a combiner cabinet 100 provided in some embodiments of the present application.

[0073] In some embodiments of the present application, the combiner cabinet 100 includes a solid-state circuit breaker 21, which includes a switch unit and an electronic control unit communicatively connected to the switch unit. The electronic control unit is used to control the opening and closing of the switch unit to control the opening and closing of the solid-state circuit breaker 21.

[0074] The solid-state circuit breaker 21 refers to a contactless switching device. The solid-state circuit breaker 21 mainly controls the flow of current by controlling the conduction state of the semiconductor element; the solid-state circuit breaker 21 usually includes a trigger, and the trigger includes a power transistor. The trigger can turn on or off the power transistor through the received control signal, thereby realizing the conduction and disconnection of the circuit; when the trigger controls the power transistor to turn off, the solid-state circuit breaker 21 will quickly cut off the current in the circuit, and the cutting speed usually only takes a few microseconds, so as to protect the junction cabinet 100 and the staff.

[0075] The switch unit refers to an electronic device in the solid-state circuit breaker 21 that controls the circuit to be opened and closed. There may be one electronic device, or two or more electronic devices. Multiple electronic devices may be connected in series, in parallel, or both. For example, the switch unit may be a power transistor.

[0076] The energy storage structure connection end and the power structure connection end are respectively provided with two connection terminals in the switch unit, and the energy storage structure connection end and the power structure connection end are electrically connected. The energy storage structure connection end and the power structure connection end can be electrically connected to other components inside the solid-state circuit breaker 21, and the energy storage structure connection end and the power structure connection end can also be electrically connected to external electrical equipment; for example, in the energy storage system, the power module 40 can and the compensation device 31 can be respectively connected to the energy storage structure connection end and the power structure connection end, so as to electrically connect the power module 40 and the compensation device 31 through the switch unit.

[0077] The electronic control unit refers to a structure for controlling the opening and closing of the switch unit by the solid-state circuit breaker 21. The structure may include a single-chip microcomputer and control the transmission of electrical signals through a drive circuit to control the opening and closing of the switch unit, thereby enabling the solid-state circuit breaker 21 to have a faster response speed; for example, the electronic control unit is capable of disconnecting the electrical connection between the energy storage structure connection end and the power structure connection end.

[0078] The electronic control unit may control the opening and closing of the switch unit through a preset program, parameter or received signal; for example, the electronic control unit may be a trigger.

[0079] Because the combiner cabinet needs to be equipped with a circuit breaker to meet the circuit breaking requirements (such as reducing the short-circuit arc requirements) in high voltage (e.g. 1500V) working conditions, the combiner cabinet 100 with a solid-state circuit breaker 21 in this embodiment can refer to a combiner cabinet used in high voltage working conditions.

[0080] For example, the junction box 100 can be used in a high-voltage energy storage system, in which the solid-state circuit breaker 21 is used to electrically connect between the power module 30 and the power module 40 of the energy storage system 200. The power module 30 is usually a capacitor, and it can also be other devices that can store and release electrical energy. Due to the presence of the power module 30, when the solid-state circuit breaker 21 is disconnected, the power module 30 will discharge and cause the voltage carried by the solid-state circuit breaker 21 to increase rapidly. However, since the solid-state circuit breaker 21 has a fast response speed, the solid-state circuit breaker 21 can complete the disconnection action before its voltage rises to exceed its disconnection capacity to meet the demand.

[0081] The circuit breaker in the current junction box 100 is usually a mechanical circuit breaker, which has a slow response speed (usually in milliseconds) and is prone to arcing. Accordingly, this embodiment sets a solid-state circuit breaker 21 in the junction box 100, and controls the conduction or disconnection of the circuit through the solid-state circuit breaker 21; this embodiment enables the solid-state circuit breaker 21 to be connected between the power module 40 and the power module 30. Since the solid-state circuit breaker 21 has the advantages of fast switching speed (microseconds) and is not prone to arcing, the response speed of the solid-state circuit breaker 21 can adapt to the voltage increase speed, so that after the solid-state circuit breaker 21 is disconnected, it is not easy for the voltage at the disconnection point to exceed the load capacity of the solid-state circuit breaker 21, and it is not easy to generate arcs, thereby meeting the requirements of the energy storage system 200 for circuit breakers.

[0082] In some embodiments, the cabinet 10 refers to a structure mainly used to provide a fixed foundation for the solid-state circuit breaker 21 and other electrical components. The cabinet 10 can also protect the solid-state circuit breaker 21 and other electrical components. The material of the cabinet 10 can be metal, plastic, wood or other various materials. The shape of the cabinet 10 can be rectangular, cylindrical or other shapes.

[0083] Furthermore, since the combiner cabinet 100 is used in a high voltage working condition, mutual interference (such as high voltage discharge, etc.) is likely to occur between the combiner cabinet 100 and another adjacent combiner cabinet 100 or other high voltage equipment in the high voltage working condition.

[0084] To reduce such interference, an insulating part can be provided on the cabinet 10. The insulating part can be an insulating coating applied to the inner wall or outer wall of the cabinet 10. The insulating part can also be an insulating shield covering the electronic components in the cabinet 10. The insulating part can also be an electronic device such as an insulating switch arranged in the cabinet 10.

[0085] According to some embodiments of the present application, reference Figure 2 , Figure 3 ,in, Figure 2 The electrical connection diagram of the combiner cabinet 100 and the connected power module 30 and power supply module 40 provided in some embodiments of the present application is as follows: Figure 3 A schematic diagram of the internal structure and electrical connections of a combiner cabinet 100 provided in some embodiments of the present application.

[0086] In some embodiments of the present application, the combiner cabinet 100 also includes a bus power supply 23 and a redundant power supply 24, the bus power supply 23 is electrically connected between the main bus of the combiner cabinet 100 and the solid-state circuit breaker 21, and the redundant power supply 24 is electrically connected between the external power supply and the solid-state circuit breaker 21.

[0087] The main bus refers to the power distribution structure for distributing current to each device in the combiner cabinet 100. The main bus can be electrically connected to the power module 40 to distribute current to each connected device. The main bus can be a rectangular bus, a circular bus, a tubular bus or a bus of other shapes. The main bus can also be an aluminum stranded wire, a copper stranded wire, an expanded diameter hollow conductor or other types of bus.

[0088] The bus power supply 23 refers to a device in the junction box 100 that can be connected to the main bus and can change the output voltage. The bus power supply 23 is electrically connected between the main bus and the solid-state circuit breaker 21, that is, the bus power supply 23 can receive the current distributed by the main bus and can output current to the solid-state circuit breaker 21. The bus power supply 23 can receive the voltage input by the main bus and can output a voltage different from the main bus voltage to adapt to the requirements of the solid-state circuit breaker 21; the bus power supply 23 may include a transformer or other structures.

[0089] The redundant power supply 24 refers to a structure in the junction cabinet 100 that can receive current from an external power supply and can output current, that is, the redundant power supply 24 can be electrically connected to an external power supply. The external power supply can be the main bus of another junction cabinet, or the main bus in the upper-level module of the junction cabinet 100. The external power supply can also be other structures with power supply capabilities.

[0090] Both the redundant power supply 24 and the bus power supply 23 can supply power to the solid-state circuit breaker 21. When either the bus power supply 23 or the external power supply fails, the other can still supply power to the solid-state circuit breaker 21. In some embodiments, switches can be set on the redundant power supply 24 and the bus power supply 23 to control the states of the redundant power supply 24 and the bus power supply 23 through the switches to control the redundant power supply 24 and the bus power supply 23 to supply power to the solid-state circuit breaker 21; in other embodiments, switch devices can be set between the redundant power supply 24 and the solid-state circuit breaker 21, and between the bus power supply 23 and the solid-state circuit breaker 21, and the switch devices can control the on-off states between the redundant power supply 24 and the solid-state circuit breaker 21, and between the bus power supply 23 and the solid-state circuit breaker 21, so as to control the redundant power supply 24 and the bus power supply 23 to supply power to the solid-state circuit breaker 21; it can be understood that the power supply states of the redundant power supply 24 and the bus power supply 23 can also be controlled by other means, not limited to the above two.

[0091] Since the voltage on the main bus is usually high, while the voltage required by the solid-state circuit breaker 21 is usually relatively low, according to this embodiment, the solid-state circuit breaker 21 is connected to the main bus through the bus power supply 23. The bus power supply 23 can convert the voltage input to the main bus and output a voltage that meets the requirements of the solid-state circuit breaker 21, so that the main bus can supply power to the solid-state circuit breaker 21; a redundant power supply 24 that can supply power to the solid-state circuit breaker 21 is also provided, and the redundant power supply 24 is connected to an external power supply. When either the bus power supply 23 or the external power supply fails, the other of the two can still supply power to the solid-state circuit breaker 21, so as to reduce the occurrence of failure of the solid-state circuit breaker 21 due to power supply failure.

[0092] In some embodiments, the main bus, bus power supply 23 and redundant power supply 24 can be directly arranged on the inner wall of the cabinet 10, or they can be connected to the cabinet 10 through structural parts respectively. The main bus, bus power supply 23 and redundant power supply 24 can also be arranged in the cabinet 10 in other ways.

[0093] refer to Figure 3 In some embodiments, the junction box 100 also includes a first redundant component 25; the first redundant component 25 is electrically connected between the bus power supply 23 and the solid-state circuit breaker 21, and between the redundant power supply 24 and the solid-state circuit breaker 21, so that both the bus power supply 23 and the redundant power supply 24 can supply power to the solid-state circuit breaker 21 through the first redundant component 25.

[0094] The first redundant component 25 refers to a structure in the combiner cabinet 100 that can receive current and output current.

[0095] The first redundant component 25 is connected to both the bus power supply 23 and the redundant power supply 24, that is, the first redundant component 25 can receive current input from the bus power supply 23 and the redundant power supply 24; the first redundant component 25 is also connected to the solid-state circuit breaker 21, that is, the first redundant component 25 can output current to the solid-state circuit breaker 21 to power the solid-state circuit breaker 21, and at this time, the bus power supply 23 indirectly supplies power to the solid-state circuit breaker 21 through the first redundant component 25; the first redundant component 25 may include a rectifier, a dual-input single-output circuit or other structures.

[0096] Both the redundant power supply 24 and the bus power supply 23 can supply power to the first redundant component 25 , and the first redundant component 25 can supply power to the solid-state circuit breaker 21 after receiving the current provided by either the redundant power supply 24 or the bus power supply 23 , so as to provide power for the operation of the solid-state circuit breaker 21 .

[0097] In this embodiment, a first redundant component 25 is provided, and the first redundant component 25 is electrically connected to an external power supply, a bus power supply 23 and a solid-state circuit breaker 21, so that both the bus power supply 23 and the external power supply can supply power to the solid-state circuit breaker 21 through the first redundant component 25. When either the bus power supply 23 or the external power supply fails, the other one can still supply power to the solid-state circuit breaker 21, so as to reduce the possibility of failure of the solid-state circuit breaker 21 due to power supply failure.

[0098] refer to Figure 3 In some embodiments, the junction cabinet 100 also includes a control component 28 and a second redundant component 26. The second redundant component 26 is electrically connected between the bus power supply 23 and the control component 28, and between the redundant power supply 24 and the control component 28, so that the bus power supply 23 and / or the redundant power supply 24 can supply power to the control component 28 through the second redundant component 26, thereby improving the stability of the junction cabinet 100.

[0099] The control component 28 refers to a structure in the combiner cabinet 100 for controlling the working state of its electrical components. The control component 28 may include a switch control structure, a baseboard management control structure or other control structures. In some examples, the control component 28 is disposed in the cabinet 10. For example, the control component 28 may be directly disposed on the inner wall of the cabinet 10, or the control component 28 may be indirectly connected to the cabinet 10 through a structural member. In some embodiments, the control component 28 may send a signal to the electronic control unit of the solid-state circuit breaker 21 so that the electronic control unit can receive the signal and control the opening and closing of the switch unit.

[0100] The second redundant component 26 refers to a structure in the combiner cabinet 100 that can receive current and output current.

[0101] The second redundant component 26 is connected to both the bus power supply 23 and the redundant power supply 24, that is, the second redundant component 26 can receive current input from the bus power supply 23 and the redundant power supply 24; the second redundant component 26 is also connected to the control component 28, that is, the second redundant component 26 can output current to the control component 28 to power the control component 28; the second redundant component 26 may include a rectifier, a dual-input single-output circuit or other structures.

[0102] Both the redundant power supply 24 and the bus power supply 23 can supply power to the second redundant component 26 , and the second redundant component 26 can supply power to the control component 28 after receiving the current provided by either the redundant power supply 24 or the bus power supply 23 , so as to supply power for the operation of the control component 28 .

[0103] In this embodiment, a second redundant component 26 is provided in the junction cabinet 100, and the second redundant component 26 is electrically connected to the external power supply, the bus power supply 23 and the control component 28, so that both the bus power supply 23 and the external power supply can supply power to the control component 28 through the second redundant component 26. When either the bus power supply 23 or the external power supply fails, the other one can still supply power to the control component 28, so as to reduce the occurrence of failure of the control component 28 due to power supply failure, thereby improving the stability of the junction cabinet 100.

[0104] In some embodiments, the control assembly 28 is communicatively connected to the solid-state circuit breaker 21 .

[0105] The solid-state circuit breaker 21 generally includes a control unit and an execution unit, wherein the execution unit is used to control the disconnection and conduction of the circuit and has the function of arc extinguishing, while the control unit is used to control the action of the execution unit.

[0106] The communication connection between the control component 28 and the solid-state circuit breaker 21 means that the control component 28 can exchange information with the control unit of the solid-state circuit breaker 21, and the control component 28 can also control the action of the execution unit of the solid-state circuit breaker 21. This setting enables the control component 28 to obtain the working status of the solid-state circuit breaker 21, and at the same time, it can also play a redundant role in the control of the solid-state circuit breaker 21, that is, when the control unit of the solid-state circuit breaker 21 fails, the control component 28 can also control the action of the execution unit of the solid-state circuit breaker 21 to control the disconnection or conduction of the solid-state circuit breaker 21, thereby improving the stability of the junction box 100; it can be understood that when the control component 28 fails, the solid-state circuit breaker 21 can also work normally.

[0107] The communication connection between the control component 28 and the solid-state circuit breaker 21 can be achieved through a wired or wireless communication connection. For example, the control component 28 can be communicated with the solid-state circuit breaker 21 through a communication cable. For another example, the control component 28 can also be communicated with the solid-state circuit breaker 21 through Bluetooth.

[0108] Furthermore, an alarm unit can be preset in the control component 28. At this time, the control component 28 is communicated with the solid-state circuit breaker 21 and the working status of the solid-state circuit breaker 21 can be monitored through the control component 28. When the control unit or execution unit of the solid-state circuit breaker 21 fails, the control component 28 can alarm through the alarm unit to facilitate the staff to discover the fault in time.

[0109] In this embodiment, the control component 28 is communicatively connected to the solid-state circuit breaker 21, so that the control component 28 can also control the state of the solid-state circuit breaker 21, so that the control component 28 and the control unit of the solid-state circuit breaker 21 can both control the circuit breaker in the solid-state circuit breaker 21. When either the control component 28 or the control unit of the solid-state circuit breaker 21 fails, the other one can still control the state of the circuit breaker in the solid-state circuit breaker 21, so as to reduce the occurrence of failure of the solid-state circuit breaker 21 due to control system failure, thereby improving the stability of the combiner cabinet 100.

[0110] refer to Figure 3 In some embodiments, the combiner cabinet 100 further includes a switching power supply 27; a switching power supply 27 is provided between the control component 28 and the second redundant component 26, or a switching power supply 27 is provided between the bus power supply 23 and the second redundant component 26, and between the redundant power supply 24 and the second redundant component 26.

[0111] The switching power supply 27 refers to a structure for converting electric energy in the combiner cabinet 100. The switching power supply 27 is used to convert the input voltage received by it through different forms of architecture and output different voltages. In some embodiments, the switching power supply 27 is arranged in the cabinet 10. For example, the switching power supply 27 can be directly arranged on the inner wall of the cabinet 10, and the switching power supply 27 can also be indirectly connected to the cabinet 10 through a structural member.

[0112] Since the control component 28 is powered by the redundant power supply 24 or the bus power supply 23, in order to make the voltage provided by the bus power supply 23 or the redundant power supply 24 adapt to the voltage requirement of the control component 28, the switch power supply 27 is arranged between the bus power supply 23 and the control component 28. Accordingly, the switch power supply 27 can be arranged between the second redundant component 26 and the control component 28, so that the switch power supply 27 can receive the voltage output from the second redundant component 26, and convert the voltage into the voltage required by the control component 28 and output it to the control component 28; the switch power supply 27 can also be arranged between the bus power supply 23 and the second redundant component 26, and between the redundant power supply 24 and the second redundant component 26, so that the switch power supply 27 can receive the voltage output from the bus power supply 23 and the redundant power supply 24, and convert the voltage into the voltage required by the control component 28 and output it to the second redundant component 26, and then output it to the control component 28 via the second redundant component 26.

[0113] In this embodiment, a switch power supply 27 is provided in the combiner cabinet 100 to convert the voltage of the bus power supply 23 into the voltage required by the control component 28 through the switch power supply 27 , thereby meeting the voltage requirement of the control component 28 .

[0114] In some embodiments, the combiner cabinet 100 further includes a fuse 22 , and the fuse 22 is electrically connected to the energy storage structure connection end of the solid-state circuit breaker 21 .

[0115] The fuse 22 refers to a structure in the combiner cabinet 100 that serves as an overload protection. When the current exceeds the preset value of the fuse 22, the fuse 22 itself can generate heat and disconnect to disconnect the corresponding circuit; the fuse 22 can be a plug-in fuse, a spiral fuse or other types of fuses.

[0116] The fuse 22 is electrically connected to the energy storage structure connection end of the solid-state circuit breaker 21, that is, the fuse 22 is arranged between the solid-state circuit breaker 21 and the power module 40. The fuse 22 is mainly used to protect the solid-state circuit breaker 21. At the same time, the fuse 22 can also protect other electrical components in the junction box 100.

[0117] In this embodiment, a fuse 22 is provided and connected between the solid-state circuit breaker 21 and the power module 40 to protect the solid-state circuit breaker 21 and other components in the combiner cabinet 100. When the current in the circuit exceeds a preset value, the fuse 22 can be blown to protect the solid-state circuit breaker 21 and other components in the combiner cabinet 100.

[0118] According to some embodiments of the present application, reference Figures 1 to 4 ,in, Figure 1 This is a three-dimensional schematic diagram of a combiner cabinet 100 provided in some embodiments of the present application. Figure 2 The electrical connection diagram of the combiner cabinet 100 and the connected power module 30 and power supply module 40 provided in some embodiments of the present application is as follows: Figure 3 Schematic diagram of the internal structure and electrical connection of the combiner cabinet 100 provided in some embodiments of the present application Figure 4 This is a front view schematic diagram of the combiner cabinet 100 provided in some embodiments of the present application with the cabinet door 13 removed.

[0119] In some embodiments of the present application, the junction box 100 also includes a cabinet body 10, which is provided with a first receiving chamber 101 and a second receiving chamber 102, the solid-state circuit breaker 21 is accommodated in the first receiving chamber 101, and the bus power supply 23, the redundant power supply 24 and the control component 28 are all accommodated in the second receiving chamber 102.

[0120] The first storage chamber 101 refers to a storage space formed in the cabinet 10; the first storage chamber 101 may be surrounded by a plate or other structural members, or may simply refer to a certain space area set in the cabinet 10; the shape of the first storage chamber 101 may be a regular shape, such as a cube, cylinder or other shapes, or an irregular shape, such as an L-shape, a U-shape or other shapes.

[0121] Similar to the first storage chamber 101, the second storage chamber 102 refers to a storage space formed in the cabinet 10; the second storage chamber 102 can be surrounded by a plate or other structural members, or it can simply refer to a certain space area set in the cabinet 10; the shape of the second storage chamber 102 can be a regular shape, such as a cube, cylinder or other shapes, or it can be an irregular shape, such as an L-shape, a U-shape or other shapes.

[0122] The solid-state circuit breaker 21 is accommodated in the first accommodation chamber 101, while the bus power supply 23, the redundant power supply 24 and the control component 28 are all accommodated in the second accommodation chamber 102. Since the solid-state circuit breaker 21 will generate a large amount of heat during operation and cause the stability of the environment in which it is located to increase, and the bus power supply 23, the redundant power supply 24 and the control component 28 are prone to failure and have poor stability when working in a high temperature environment, the solid-state circuit breaker 21 is arranged in the first accommodation chamber 101, and the bus power supply 23, the redundant power supply 24 and the control component 28 are arranged in the second accommodation chamber 102, and the solid-state circuit breaker 21 and the bus power supply 23, the redundant power supply 24 and the control component 28 are separated by space, thereby reducing the negative impact of the heat generated by the solid-state circuit breaker 21 on the bus power supply 23, the redundant power supply 24, the bus power supply 23, the redundant power supply 24 and the control component 28.

[0123] Since the solid-state circuit breaker 21 generates a lot of heat during operation, the working environment temperature of the bus power supply 23, the redundant power supply 24 and the control component 28 should not be too high. Accordingly, in this embodiment, a first receiving chamber 101 and a second receiving chamber 102 are set in the cabinet body 10 of the combiner cabinet 100, and the solid-state circuit breaker 21 is received by the first receiving chamber 101, and the bus power supply 23, the redundant power supply 24 and the control component 28 are received by the second receiving chamber 102, so that the solid-state circuit breaker 21 is separated from the bus power supply 23, the redundant power supply 24 and the control component 28 in space by the first receiving chamber 101 and the second receiving chamber 102, so that the solid-state circuit breaker 21 and the bus power supply 23, the redundant power supply 24 and the control component 28 are in different working spaces, so that the negative impact that the solid-state circuit breaker 21 may have on the bus power supply 23, the redundant power supply 24 and the control component 28 can be alleviated.

[0124] In some embodiments, the first accommodating chamber 101 and the second accommodating chamber 102 are both surrounded by structural parts. At this time, in addition to the spatial separation, the structural parts can also play the role of separating the solid-state circuit breaker 21 from the bus power supply 23, the redundant power supply 24, and the control component 28, thereby better reducing the negative impact of the high temperature generated by the solid-state circuit breaker 21 on the bus power supply 23, the redundant power supply 24, and the control component 28.

[0125] Furthermore, the material of the structural parts can also include materials with strong heat insulation capabilities, such as glass fiber, asbestos, vacuum panels, etc., to further reduce the negative impact of the high temperature generated by the solid-state circuit breaker 21 on the bus power supply 23, redundant power supply 24, and control component 28.

[0126] refer to Figure 4 In some embodiments, along the direction of gravity, the first receiving chamber 101 is disposed above the second receiving chamber 102 .

[0127] Since the first storage chamber 101 contains the solid-state circuit breaker 21, which is a high-heat generating device, and since hot air tends to move in a direction away from gravity compared to cold air, arranging the first storage chamber 101 above the second storage chamber 102 along the direction of gravity can enable the hot air generated by the solid-state circuit breaker 21 in the first storage chamber 101 to move upward, thereby reducing the impact of the hot air on the electrical components in the second storage chamber 102, thereby reducing the stability of the environment in which the bus power supply 23, the redundant power supply 24, and the control component 28 are located, thereby further reducing the negative impact of the solid-state circuit breaker 21 on the bus power supply 23, the redundant power supply 24, and the control component 28.

[0128] In this embodiment, the first accommodation chamber 101 is arranged above the second accommodation chamber 102. Since the first accommodation chamber 101 is used to accommodate the solid-state circuit breaker 21, and hot air usually rises, the first accommodation chamber 101 is arranged above the second accommodation chamber 102 to reduce the hot air entering the second accommodation chamber 102, thereby further alleviating the negative impact that the solid-state circuit breaker 21 may have on the bus power supply 23, the redundant power supply 24, and the control component 28, thereby improving the reliability and stability of the junction cabinet 100.

[0129] refer to Figure 4 In some embodiments, a third storage chamber 103 is further provided in the combiner cabinet 100 , and the fuse 22 is accommodated in the third storage chamber 103 ; the third storage chamber 103 and the first storage chamber 101 are respectively provided on opposite sides of the second storage chamber 102 .

[0130] The third storage chamber 103 refers to a storage space formed in the cabinet 10. The third storage chamber 103 is used to accommodate cables entering the junction cabinet 100. The third storage chamber 103 is also used to accommodate the portion of cables extending from the junction cabinet 100 to the outside that is located in the junction cabinet 100. The third storage chamber 103 can be surrounded by a plate or other structural parts, or it can only refer to a certain space area set in the cabinet 10. The shape of the third storage chamber 103 can be a regular shape, such as a cube, a cylinder or other shapes, or it can be an irregular shape, such as an L-shape, a U-shape or other shapes.

[0131] The third accommodating chamber 103 and the first accommodating chamber 101 are arranged on opposite sides of the second accommodating chamber 102, and the fuse 22 is accommodated in the third accommodating chamber 103. This arrangement can reduce the negative impact of the temperature generated by the solid-state circuit breaker 21 on the fuse 22, so that the fuse 22 can better play a role in protecting the circuit without affecting the service life due to the increase in ambient temperature and causing failure.

[0132] Because the first storage chamber 101 is above the second storage chamber 102 in the direction of gravity, and the third storage chamber 103 and the first storage chamber 101 are arranged on opposite sides of the second storage chamber 102, the third storage chamber 103 is below the second storage chamber 102 in the direction of gravity; and because the cables in the energy storage system 200 are usually laid near the ground through structures such as ground cable trenches and ground cable troughs, arranging the third storage chamber 103 below the second storage chamber 102 can make the third storage chamber 103 closer to the ground, so that more cables can be accommodated in the third storage chamber 103, and reduce the cables exposed to the outside, so that the cabinet 10 can protect more cables.

[0133] In this embodiment, a third storage chamber 103 for accommodating the fuse 22 is provided in the junction box 100, and the third storage chamber 103 and the first storage chamber 101 are respectively provided on opposite sides of the second storage chamber 102, so that the third storage chamber 103 and the first storage chamber 101 are separated by the second storage chamber 102 to alleviate the negative impact that the first storage chamber 101 may have on the fuse 22; at the same time, the third storage chamber 103 can accommodate more cables, so that the third storage chamber 103 can play a role in protecting the cables.

[0134] In some embodiments, the cables enter the third storage chamber 103 from the side of the cabinet 10 facing the ground. After the cables in the cabinet 10 enter the third storage chamber 103, they extend to the outside through the side of the cabinet 10 facing the ground. At this time, the cabinet 10 can also shield the cables under the cabinet 10, so as to better protect the cables. At the same time, this setting can also reduce the occurrence of external debris (dust, fallen leaves, rainwater, etc.) entering the interior of the cabinet 10 along the cables.

[0135] In some embodiments, the cables entering the third storage chamber 103 from the outside and the cables extending from the third storage chamber 103 to the outside are respectively arranged on different sides of the third storage chamber 103 to facilitate identification by staff.

[0136] refer to Figure 1 In some embodiments, a heat dissipation structure 11 is provided on the cabinet 10 , and the heat dissipation structure 11 is at least opposite to the first receiving chamber 101 .

[0137] The heat dissipation structure 11 may be a heat dissipation hole opened in the cabinet 10 to dissipate heat naturally through air circulation. The heat dissipation structure 11 may also be an air cooling component, a water cooling component or other heat dissipation devices or structures.

[0138] The heat dissipation structure 11 can be arranged only on one side of the first storage chamber 101 and opposite to the first storage chamber 101, so that the air in the first storage chamber 101 can be circulated and exchanged with the outside air, thereby playing a role in reducing the temperature in the first storage chamber 101; the heat dissipation structure 11 can also be opposite to both the first storage chamber 101 and the second storage chamber 102, so that the air in both the first storage chamber 101 and the second storage chamber 102 can be circulated and exchanged with the outside air, thereby playing a role in reducing the temperature in the first storage chamber 101 and the second storage chamber 102.

[0139] In this embodiment, since the solid-state circuit breaker 21 in the first accommodation chamber 101 generates high heat, the heat dissipation structure 11 is at least opposite to the first accommodation chamber 101 to better dissipate heat and alleviate the over-high temperature in the combiner cabinet 100.

[0140] In some embodiments, the heat dissipation structure 11 includes heat dissipation holes opened in the cabinet 10 .

[0141] The heat dissipation structure 11 includes heat dissipation holes opened in the cabinet 10 , and the heat dissipation holes can connect the first receiving chamber 101 opposite thereto with the outside world and realize natural cooling through air circulation.

[0142] There can be one or more heat dissipation holes; the shape of the heat dissipation holes can be circular, square or other shapes; the heat dissipation holes can 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 a whole heat dissipation area, and the heat dissipation holes can also be scattered on any surface or multiple surfaces of the cabinet 10.

[0143] At present, the cabinet 10 is mostly cooled by fans. However, the installation of fans in the junction cabinet 100 will cause a large number of floating metal devices 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 first accommodation chamber 101 to meet the heat dissipation requirements, thereby improving the reliability and stability of the cabinet 10 and reducing the heat dissipation cost.

[0144] refer to Figure 1 In some embodiments, an observation window 12 is provided on the cabinet 10 .

[0145] The observation window 12 can be a transparent component embedded in the cabinet 10, so that the staff can observe the situation inside the cabinet 10 through the observation window 12; the material of the observation window 12 can be glass, acrylic or other transparent materials; the shape of the observation window 12 can be square, round or other shapes.

[0146] refer to Figure 1 In some embodiments, a cabinet door 13 is rotatably connected to the cabinet body 10; along the direction of gravity, a shielding structure 14 connected to the cabinet body 10 is provided above the cabinet door 13, and the shielding structure 14 protrudes from the cabinet body 10 along the direction where the cabinet door 13 is located.

[0147] The cabinet door 13 refers to a structure that can be covered on the cabinet body 10. The cabinet door 13 can rotate relative to the cabinet body 10, that is, the cabinet door 13 can cover the cabinet body 10 and can also be opened to facilitate the operation of the staff; the cabinet door 13 can be rotatably connected to the cabinet body 10 through hinges, rotating shafts, hinges or other rotating connection structures.

[0148] The area of ​​the cabinet door 13 can be greater than or equal to the area of ​​the opening on the cabinet body 10, so that the cabinet door 13 can completely close the opening when it covers the cabinet body 10; the area of ​​the cabinet door 13 can also be smaller than the area of ​​the opening on the cabinet body 10, so that when the cabinet door 13 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.

[0149] The shape of the cabinet door 13 can be square, circular or other shapes, and the shape of the cabinet door 13 can also be set according to the shape of the opening on the cabinet body 10; the material of the cabinet door 13 can be the same as the material of the cabinet body 10 or the isolation piece, or it can be other materials. The material of the cabinet door 13 can specifically be metal, plastic, wood or other materials.

[0150] The cabinet door 13 can protect the components in the first storage chamber 101 , the second storage chamber 102 and the third storage chamber 103 in the cabinet 10 , so as to reduce the influence of the external environment on the components in the cabinet 10 .

[0151] The shielding structure 14 refers to a structure protruding from the cabinet body 10; the shielding structure 14 can be a plate-like structure or a block-like structure; the shielding structure 14 can be connected to the cabinet body 10 by welding, gluing, screwing or other methods, and the shielding structure 14 can also be integrally formed with the cabinet body 10; the material of the shielding structure 14 can be the same as the material of the cabinet body 10, or it can be different from the material of the cabinet body 10, for example, the material of the shielding structure 14 can be metal, plastic, wood or other materials.

[0152] The shielding structure 14 is arranged above the cabinet door 13 along the direction of gravity. The shielding structure 14 extends from the cabinet body 10 above the cabinet door 13 and protrudes outside the cabinet body 10, so that a structure similar to an eaves can be formed above the cabinet door 13 to reduce the occurrence of debris entering the cabinet body 10 along the gap between the cabinet door 13 and the cabinet body 10, and is also used to reduce the occurrence of debris entering the cabinet door 13 when the cabinet door 13 is opened; the shielding structure 14 is mainly used to reduce rainwater or other liquids from entering the cabinet body 10, and the shielding structure 14 can also be used to reduce leaves or other debris from entering the cabinet body 10.

[0153] In this embodiment, a cabinet door 13 is provided to protect the devices in the first storage chamber 101, the second storage chamber 102 and the third storage chamber 103 in the cabinet body 10 through the cabinet door 13, so as to reduce the influence of the external environment on the various components in the cabinet body 10; a shielding structure 14 is provided above the cabinet door 13 to reduce the occurrence of rainwater or other debris entering the interior of the cabinet body 10 through the gap of the cabinet door 13, thereby further reducing the influence of the external environment on the various components in the cabinet body 10.

[0154] refer to Figures 1 to 4 In some embodiments of the first aspect of the present application, a solid-state circuit breaker 21 is provided in the cabinet body 10 of the junction cabinet 100, and the solid-state circuit breaker 21 is arranged between the power module 40 and the power module 30, so that the disconnection response speed of the solid-state circuit breaker 21 can meet the requirements.

[0155] A redundant power supply 24 and a bus power supply 23 are provided, and the solid-state circuit breaker 21 is powered by the redundant power supply 24 and the bus power supply 23, so that any failure of the bus power supply 23 and the redundant power supply 24 will not cause the solid-state circuit breaker 21 to fail, thereby improving the reliability and stability of the solid-state circuit breaker 21; the control component 28 is powered by the redundant power supply 24 and the bus power supply 23, so that any failure of the bus power supply 23 and the redundant power supply 24 will not cause the control component 28 to fail, thereby improving the reliability and stability of the control component 28; the working state of the solid-state circuit breaker 21 is controlled by the control component 28 and the control unit of the solid-state circuit breaker 21 itself, so that any failure of the control component 28 and the control unit of the solid-state circuit breaker 21 itself will not cause the solid-state circuit breaker 21 to fail, thereby improving the reliability and stability of the solid-state circuit breaker 21.

[0156] A first accommodating chamber 101, a second accommodating chamber 102 and a third accommodating chamber 103 are sequentially arranged in the cabinet 10 from top to bottom along the direction of gravity, and a solid-state circuit breaker 21 is arranged in the first accommodating chamber 101 to reduce the negative impact of the high temperature generated by the solid-state circuit breaker 21 on the bus power supply 23, the redundant power supply 24 and the control component 28; the fuse 22 and the cable are arranged in the third accommodating chamber 103 to reduce the negative impact of the solid-state circuit breaker 21 on the fuse 22 and the cable, and more cables can be accommodated in the cabinet 10 to better protect the cables.

[0157] In the second aspect, some embodiments of the present application further provide an energy storage system 200, comprising the junction box 100 provided by some embodiments of the first aspect, as well as a power module 40 and a power module 30; wherein the power module 30 includes a compensation device 31 electrically connected to the solid-state circuit breaker 21.

[0158] The power module 40 refers to a structure that provides current in the energy storage system 200 . The power module 40 may be a battery or other structure that can provide power.

[0159] The power module 30 refers to the structure for converting electric energy in the energy storage system 200. The power module 30 may include various semiconductor devices, such as diodes, insulated gate bipolar transistors (IGBT), metal oxide semiconductor field effect transistors (MOSFET), etc.; generally, the power module 30 may be used for high voltage and high current power control and conversion tasks, such as motor drives, inverters, power supply systems, electric vehicle drives, industrial frequency converters, etc.

[0160] The power module 30 includes a compensation device 31, which refers to a device that can store and compensate electrical energy. The compensation device 31 can play a role in compensating and stabilizing the voltage when the voltage in the power module 30 changes; the compensation device 31 can be a capacitor or other device with compensation capability.

[0161] In the energy storage system 200, due to the presence of the compensation device 31, when the mechanical circuit breaker is disconnected, the voltage carried by the mechanical circuit breaker will rise rapidly and exceed its breaking capacity. This process is usually completed within a few microseconds, and the response speed of the mechanical circuit breaker is slower than the speed of voltage increase. Accordingly, the solid-state circuit breaker 21 in the junction box 100 is set between the power module 40 and the compensation device 31 to control the conduction or disconnection of the circuit through the solid-state circuit breaker 21. Because the solid-state circuit breaker 21 has the advantages of fast switching speed (microsecond level) and not easy to generate arcs, the response speed of the solid-state circuit breaker 21 can adapt to the voltage increase speed after the solid-state circuit breaker 21 in the energy storage system 200 is disconnected, so that the voltage at the disconnection point after the solid-state circuit breaker 21 is disconnected is not easy to exceed the load capacity of the solid-state circuit breaker 21, and it is not easy to generate arcs, thereby meeting the requirements of the energy storage system 200 for circuit breakers.

[0162] Finally, it should be noted that 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A combiner cabinet, used in an energy storage system, characterized in that: include: A solid-state circuit breaker, the solid-state circuit breaker comprising a switch unit and an electronic control unit communicatively connected to the switch unit; The switch unit includes an energy storage structure connection end and a power structure connection end, and the energy storage structure connection end and the power structure connection end are used to be electrically connected to the internal components of the solid-state circuit breaker; the electronic control unit is used to disconnect the electrical connection between the energy storage structure connection end and the power structure connection end.

2. The combiner cabinet according to claim 1, characterized in that: The combiner cabinet also includes a bus power supply and a redundant power supply. The bus power supply is electrically connected between the main bus of the combiner cabinet and the solid-state circuit breaker, and the redundant power supply is electrically connected between an external power supply and the solid-state circuit breaker.

3. The combiner cabinet according to claim 2, characterized in that: The combiner cabinet further includes a first redundant component; The first redundant component is electrically connected between the bus power supply and the solid-state circuit breaker, and between the redundant power supply and the solid-state circuit breaker, so that both the bus power supply and the redundant power supply can supply power to the solid-state circuit breaker through the first redundant component.

4. The combiner cabinet according to claim 3, characterized in that: The combiner cabinet also includes a control component and a second redundant component; The second redundant component is electrically connected between the bus power supply and the control component, and between the redundant power supply and the control component, so that both the bus power supply and the redundant power supply can supply power to the control component through the second redundant component.

5. The combiner cabinet according to claim 4, characterized in that: The control assembly is communicatively connected to the solid-state circuit breaker.

6. The combiner cabinet according to claim 4, characterized in that: The combiner cabinet also includes a switching power supply; The switching power supply is provided between the control component and the second redundant component, or the switching power supply is provided between the bus power supply and the second redundant component, or between the redundant power supply and the second redundant component.

7. The combiner cabinet according to any one of claims 4 to 6, characterized in that: The combiner cabinet further comprises a cabinet body, wherein a first accommodating chamber and a second accommodating chamber are provided in the cabinet body, the solid-state circuit breaker is accommodated in the first accommodating chamber, and the bus power supply, the redundant power supply and the control component are all accommodated in the second accommodating chamber.

8. The combiner cabinet according to claim 7, characterized in that: Along the direction of gravity, the first receiving chamber is arranged above the second receiving chamber.

9. The combiner cabinet according to claim 7, characterized in that: The combiner cabinet further includes a fuse disposed in the cabinet body, and the fuse is electrically connected to the energy storage structure connection end of the solid-state circuit breaker.

10. The combiner cabinet according to claim 9, characterized in that: The combiner cabinet is further provided with a third storage chamber, and the fuse is accommodated in the third storage chamber; The third accommodation chamber and the first accommodation chamber are respectively arranged on two opposite sides of the second accommodation chamber.

11. The combiner cabinet according to claim 7, characterized in that: The cabinet is provided with a heat dissipation structure, and the heat dissipation structure is at least opposite to the first receiving chamber.

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

13. The combiner cabinet according to claim 7, characterized in that: An observation window is arranged on the cabinet.

14. The combiner cabinet according to claim 7, characterized in that: The cabinet body is rotatably connected with a cabinet door; Along the direction of gravity, a shielding structure connected to the cabinet body is provided above the cabinet door, and the shielding structure protrudes from the cabinet body along a direction from the cabinet body to the cabinet door.

15. An energy storage system, characterized in that: comprising a combiner cabinet as claimed in any one of claims 1 to 14; and a power module, electrically connected to the solid-state circuit breaker; A power module includes a compensation device electrically connected to the solid-state circuit breaker.

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