String type energy storage inverter cabinet

Abstract

The utility model discloses a string type energy storage inverter cabinet, and belongs to the technical field of inverters. The string type energy storage inverter cabinet provided by the utility model comprises a frame, energy storage inverter modules and a control cabinet, the frame is of a hollow cuboid structure and is used for accommodating the energy storage inverter modules and the control cabinet, the middle part of the frame is provided with an air inlet screen plate, the frame is internally provided with two groups of inverter modules and control cabinets in a back-to-back manner, and the two groups of inverter modules and control cabinets are connected with the air inlet screen plate. The inverter module is arranged above the air inlet screen plate in a hanging mode, the control cabinet is arranged below the air inlet screen plate, the length of the control cabinet is smaller than that of the air inlet screen plate, an air inlet is formed in the bottom face of the inverter module, and an air outlet is formed in the top face of the inverter module. The power density is increased by the back-to-back hanging design of the inverter modules, so that the capacity of the inverter power module of a single cabinet is increased, the maintenance is convenient, and the design of the external frame, the air inlet screen plate, the air inlet and the air outlet increases the air inlet and outlet area and improves the heat dissipation capability.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a string-type energy storage inverter cabinet. Background Art

[0002] Energy storage PCS (Power Conversion System) is mainly divided into string-type PCS and traditional centralized PCS. The string-type PCS can realize cluster-level management and perform one-to-one precise control on each battery cluster, thereby reducing the imbalance between batteries and improving the overall performance and service life of the system. Therefore, the string-type PCS is gradually replacing the centralized PCS.

[0003] The string-type energy storage inverter is an important part of the string-type PCS. At present, most of the energy storage inverter systems on the market adopt an integrated cabinet solution. A multi-layer bracket for placing the energy storage inverter is arranged in a sealed cabinet. The power module capacity of a single cabinet is limited, and the module system, communication system, auxiliary power supply system, and heat dissipation system are all integrated in the cabinet, resulting in a compact internal layout, difficult maintenance, a small air inlet and outlet area for the module, and it is difficult to meet the heat dissipation requirements. Summary of the Utility Model

[0004] The utility model aims at the above problems of the prior art and provides a string-type energy storage inverter cabinet.

[0005] The string-type energy storage inverter cabinet provided by the utility model is used in combination with an energy storage battery cabinet and a transformer cabinet, and includes a frame, an energy storage inverter module group, and a control cabinet. Among them:

[0006] The frame is a hollow cuboid structure for accommodating the energy storage inverter module group and the control cabinet; an air inlet net plate is arranged along the circumference of the middle part of the frame; a first slide rail and a second slide rail are symmetrically arranged along the length direction of the top surface of the frame.

[0007] The energy storage inverter module group includes a first inverter module and a second inverter module. The first inverter module is hung on the first slide rail, and the second inverter module is hung on the second slide rail; both the first inverter module and the second inverter module include a plurality of inverter components; an air inlet is arranged on the bottom surface of the inverter component, an air outlet is arranged on the top surface, and an air duct is arranged inside.

[0008] The control cabinet is arranged directly below the air inlet net plate, and the length of the control cabinet is less than that of the air inlet net plate; the bottom of the control cabinet is fixed to the bottom surface of the frame; the control cabinet includes a first control cabinet and a second control cabinet, and the first control cabinet and the second control cabinet are symmetrically arranged along the length direction of the frame; inside the first control cabinet and the second control cabinet, a DC circuit breaker assembly and an AC circuit breaker assembly are arranged from bottom to top; the DC circuit breaker assembly includes a plurality of DC circuit breakers, and the AC circuit breaker assembly includes a plurality of AC circuit breakers; an AC output interface is arranged on the left side surface of the control cabinet; a secondary circuit is arranged on the right side surface of the control cabinet.

[0009] The output end of the battery cluster in the energy storage battery cabinet is connected to the input end of the inverter assembly through a DC circuit breaker, and the output end of the inverter assembly is connected to the AC output interface through an AC circuit breaker; the AC output interface is electrically connected to the transformer in the transformer cabinet.

[0010] Preferably, the AC output interface includes an AC outgoing line port and a docking copper bar, and the transformer is electrically connected to the docking copper bar through the AC outgoing line port.

[0011] Preferably, a protective net is arranged below the top surface of the frame, and the inverter assembly has a waterproof function.

[0012] Preferably, a door body is arranged on the right side surface of the control cabinet, and an emergency stop button is arranged on the door body.

[0013] Preferably, a first door body is arranged on the front sides of the first control cabinet and the second control cabinet, and a louver is arranged on the part of the first door body on the right side.

[0014] Preferably, lifting corner fittings are arranged at the four corners of the top surface of the frame, and a transportation fixing interface is also arranged on the frame.

[0015] Preferably, a cabinet body installation fixing interface, a grounding wire incoming port, a DC incoming port, and a grounding bar are arranged on the bottom surface of the control cabinet; a grounding block is arranged on the bottom surface of the frame.

[0016] Preferably, the string-type energy storage inverter cabinet further includes an inverter assembly replacement dummy panel.

[0017] Preferably, the inverter assembly is electrically connected to the DC circuit breaker and the AC circuit breaker through power cables, a wire binding bridge is arranged below the inverter assembly, and the wire binding bridge is used to support and fix the power cables; a PG waterproof joint is arranged on the inner wall of the top surface of the control cabinet, and the power cables pass through the PG waterproof joint and are electrically connected to the DC circuit breaker and the AC circuit breaker.

[0018] Preferably, an inverter signal line inlet is provided above the control cabinet, and an external communication line inlet is provided at the bottom surface of the control cabinet; the inverter signal line passes through the inverter signal line inlet, one end is electrically connected to the inverter assembly, and the other end is electrically connected to the secondary circuit; the external communication line is connected through the external communication line inlet and is electrically connected to the secondary circuit.

[0019] The utility model has the following beneficial effects: The string-type energy storage inverter cabinet provided by the utility model includes a frame, an energy storage inverter module group and a control cabinet. The frame is a hollow cuboid structure for accommodating the energy storage inverter module group and the control cabinet. An air inlet net plate is arranged in the middle of the frame. Two groups of inverter module groups and control cabinets are arranged back to back in the frame. The inverter module groups are arranged above the air inlet net plate in a hanging manner, and the control cabinet is arranged below the air inlet net plate. The length of the control cabinet is less than the length of the air inlet net plate. An air inlet is arranged on the bottom surface of the inverter module group, and an air outlet is arranged on the top surface. The back-to-back hanging design of the inverter module groups increases the power density, thereby increasing the capacity of the inverter power module in a single cabinet and facilitating maintenance. The designs of the external frame, the air inlet net plate, the air inlet and the air outlet increase the air inlet and outlet areas and improve the heat dissipation capacity. Description of the Drawings

[0020] Figure 1 It is a three-dimensional view of the string-type energy storage inverter cabinet provided by the embodiment of the utility model.

[0021] Figure 2 It is an external front view of the string-type energy storage inverter cabinet provided by the embodiment of the utility model.

[0022] Figure 3 It is an external rear view of the string-type energy storage inverter cabinet provided by the embodiment of the utility model.

[0023] Figure 4 It is an external left view of the string-type energy storage inverter cabinet provided by the embodiment of the utility model.

[0024] Figure 5 It is an external right view of the string-type energy storage inverter cabinet provided by the embodiment of the utility model.

[0025] Figure 6 It is a top view of the string-type energy storage inverter cabinet provided by the embodiment of the utility model.

[0026] Figure 7 It is a bottom view of the string-type energy storage inverter cabinet provided by the embodiment of the utility model.

[0027] Figure 8 It is an internal front view of the string-type energy storage inverter cabinet provided by the embodiment of the utility model.

[0028] Figure 9 This is the internal rear view of the string - type energy storage inverter cabinet provided by the embodiment of the present utility model.

[0029] Figure 10 This is the internal left view of the string - type energy storage inverter cabinet provided by the embodiment of the present utility model.

[0030] Figure 11 This is the internal right view of the string - type energy storage inverter cabinet provided by the embodiment of the present utility model.

[0031] Figure 12 This is the vertical sectional view of the string - type energy storage inverter cabinet provided by the embodiment of the present utility model.

[0032] Figure 13 This is the horizontal sectional view at the bottom of the control cabinet of the string - type energy storage inverter cabinet provided by the embodiment of the present utility model.

[0033] Figure 14 This is the schematic diagram of cable wiring of the string - type energy storage inverter cabinet provided by the embodiment of the present utility model.

[0034] Figure 15 This is the schematic diagram of module addition and subtraction of the string - type energy storage inverter cabinet provided by the embodiment of the present utility model.

[0035] Figure 16 This is the schematic diagram of the hoisting scene of the string - type energy storage inverter cabinet provided by the embodiment of the present utility model.

[0036] In the attached drawings:

[0037] 100, frame; 110, air inlet net plate; 120, protective net; 130, hoisting corner fitting; 140, transportation fixing interface; 150, grounding block;

[0038] 210, first inverter module; 220, second inverter module; 230, inverter assembly; 240, dummy panel for inverter assembly complementation;

[0039] 310, first control cabinet; 320, second control cabinet; 330, DC breaker assembly, 331, DC breaker; 340, AC breaker assembly; 341, AC breaker; 351, AC outlet; 352, docking copper bar; 360, secondary circuit; 370, emergency stop button; 371, louver; 372, cabinet body installation and fixing interface; 373, grounding wire inlet; 374, DC inlet; 375, grounding bar; 376, power cable; 377, wire tying bridge; 378, PG waterproof joint; 379, inverter signal wire inlet; 380, external communication wire inlet. Detailed implementation manners

[0040] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the accompanying drawings.

[0041] As Figures 1-16 shown, an embodiment of the present utility model provides a string-type energy storage inverter cabinet. The string-type energy storage inverter cabinet is used in combination with an energy storage battery cabinet and a transformer cabinet, and includes a frame 100, an energy storage inverter module, and a control cabinet.

[0042] The frame 100 is a hollow cuboid structure for accommodating the energy storage inverter module and the control cabinet; an air inlet net plate 110 is arranged along the circumferential direction of the frame in the middle of the frame 100; first sliding rails and second sliding rails are symmetrically arranged along the length direction of the frame 100 on the top surface of the frame 100.

[0043] In an embodiment of the present utility model, the frame is made of materials such as steel, aluminum alloy, and stainless steel.

[0044] In some embodiments of the present utility model, lifting angle members 130 are arranged at the four corners of the top surface of the frame 100, and the lifting angle members 130 are used for Figure 16 the lifting scenario shown.

[0045] In some embodiments of the present utility model, a transportation fixing interface 140 is further arranged on the frame 100. Before transportation, the integrator fixes the frame 100 on the structural member through the transportation fixing interface 140 to ensure the stability of the cabinet during transportation.

[0046] In some embodiments of the present utility model, the transportation fixing interface 140 is a threaded hole.

[0047] The energy storage inverter module includes a first inverter module 210 and a second inverter module 220. The first inverter module 210 is hung on the first sliding rail, and the second inverter module 220 is hung on the second sliding rail; both the first inverter module 210 and the second inverter module 220 include a plurality of inverter components 230; an air inlet is arranged on the bottom surface of the inverter component 230, an air outlet is arranged on the top surface, and an air duct is arranged inside.

[0048] In an embodiment of the present utility model, the first sliding rail and the second sliding rail are arranged oppositely, and the two groups of inverter modules are respectively hung on the first sliding rail and the second sliding rail to form a back-to-back design, greatly increasing the power density and improving the power capacity of a single cabinet. As Figures 1-16As shown, in some embodiments of the present utility model, the length, width, and height of the string-type energy storage inverter cabinet are: 3534mm x 1860mm x 2898mm. Both the first inverter module and the second inverter module include 12 inverter components, and each cabinet body includes 24 inverter components. If the power of each inverter component is 215KW, the power capacity of the entire cabinet body is approximately 5MW. While for a traditional bracket-type cabinet body, 2 - 3 cabinets need to be combined to reach a capacity of 5MW. It can be seen that by using the string-type energy storage inverter cabinet provided by the present utility model, a larger power capacity can be achieved with a smaller floor area, reducing the material costs of the cabinet body itself and its external connections. At the same time, it reduces the time and labor costs for repeated hoisting, installation, transportation, and packaging.

[0049] In some embodiments of the present utility model, a protective net 120 is provided below the top surface of the frame 100, and the inverter component 230 has an IP66 waterproof rating. While taking into account air outlet heat dissipation, the protective net 120 prevents foreign objects such as fallen leaves and garbage bags from blocking the air outlet of the inverter component 230, causing system abnormalities.

[0050] As Figure 15 shown, in some embodiments of the present utility model, the string-type energy storage inverter cabinet further includes an inverter component replacement dummy panel 240. The inverter component replacement dummy panel 240 is used to fill the empty space of the energy storage inverter module above the air inlet net plate. As Figures 1-16 shown, according to the design specifications, each inverter module can accommodate 12 inverter components, and the entire cabinet body can accommodate 24 inverter components. If, in practice, not so many inverter components are needed, for the empty positions, the inverter component replacement dummy panel is used to fill them to fix the remaining inverter components. If it is necessary to increase the inverter power capacity, the inverter component replacement dummy panel is removed and the inverter component is installed.

[0051] The control cabinet is arranged directly below the air inlet net plate 110, and the length of the control cabinet is less than the length of the air inlet net plate 110; the bottom of the control cabinet is fixed to the bottom surface of the frame 100; the control cabinet includes a first control cabinet 310 and a second control cabinet 320, and the first control cabinet 310 and the second control cabinet 320 are symmetrically arranged along the length direction of the frame 100; within the first control cabinet 310 and the second control cabinet 320, a DC circuit breaker component 330 and an AC circuit breaker component 340 are arranged from bottom to top; the DC circuit breaker component 330 includes a plurality of DC circuit breakers 331, and the AC circuit breaker component 340 includes a plurality of AC circuit breakers 341; an AC output interface is arranged on the left side surface of the control cabinet; a secondary circuit 360 is arranged on the right side surface of the control cabinet.

[0052] As Figures 3-4As shown, in the embodiment of the utility model, an air inlet mesh plate 110 is designed in the middle of the frame 100, and the lower left and lower right parts of the air inlet mesh plate 110 are left empty, and cold air enters from the surrounding and lower parts of the air inlet mesh plate, and is discharged through the air inlet at the bottom of the inverter module, the internal air duct, the air outlet at the top, and the protective net. Compared with the design of the traditional closed cabinet, the air inlet and outlet area is greatly increased, and the heat dissipation capacity of the cabinet is effectively improved.

[0053] The output end of the battery cluster in the energy storage battery cabinet is connected to the input end of the inverter assembly 230 via the DC circuit breaker 331, and the output end of the inverter assembly 230 is connected to the AC output interface via the AC circuit breaker 341; the AC output interface is electrically connected to the transformer in the transformer cabinet.

[0054] In the embodiment of the utility model, the front sides of the first control cabinet and the second control cabinet are both provided with a first door body, and the right side of the first door body is provided with a shutter 371. The shutters 371 on the doors of the first control cabinet and the second control cabinet are arranged diagonally staggered to form air convection to take away the heat in the control cabinet.

[0055] like Figures 8-9 As shown, in the embodiment of the utility model, the first inverter module and the second inverter module each include 12 inverter components, and correspondingly, the first control cabinet and the second control cabinet each include 12 DC circuit breakers and 12 AC circuit breakers, the DC circuit breaker is located below the AC circuit breaker, and the first control cabinet and the second control cabinet can both be connected to 12 battery clusters.

[0056] like Figure 14 As shown, in some embodiments of the utility model, the inverter assembly is electrically connected to the DC circuit breaker 331 and the AC circuit breaker 341 through a power cable 376, and a wire binding bridge 377 is arranged under the inverter assembly 230, and the wire binding bridge 377 is used to support and fix the power cable 376; a PG waterproof connector 378 is arranged on the inner wall of the top surface of the control cabinet, and the power cable 376 passes through the PG waterproof connector 378 to be electrically connected to the DC circuit breaker 331 and the AC circuit breaker 341.

[0057] like Figure 4 , Figure 10 As shown, in the embodiment of the utility model, the AC output interface includes an AC outlet 351 and a docking copper bus 352, and the transformer is electrically connected to the docking copper bus 352 through the AC outlet 351. The output ends of the first inverter module and the second inverter module converge to the AC output interface and are connected to the power grid after being stepped up by an external transformer.

[0058] like Figure 5As shown in the figure, in the embodiment of the present utility model, a door is provided on the right side of the control cabinet, and an emergency stop button 370 is provided on the door.

[0059] As Figures 1-16 shown, in the embodiment of the present utility model, the bottom surface of the control cabinet is provided with a cabinet body installation and fixing interface 372, a grounding wire inlet 373, a DC inlet 374, and a grounding bar 375; a grounding block 150 is provided on the bottom surface of the frame. Through the cabinet body installation and fixing interface 372, the cabinet body can be fixed on the foundation or the transformer cabinet. One end of the grounding wire is connected to the grounding bar 375, then passes through the grounding wire inlet 373 and is led out to be connected to the total grounding of the transformer cabinet or the foundation. The output wire of the battery cluster is connected through the DC inlet 374 and is connected to the DC circuit breaker 331. The string-type energy storage inverter cabinet is grounded through the grounding block 150.

[0060] In the embodiment of the present utility model, the secondary circuit 360 includes a communication system and an auxiliary power supply system. As Figure 7 、 Figure 11 shown, in the embodiment of the present utility model, an inverter signal wire inlet 379 is provided above the control cabinet, and an external communication wire inlet 380 is provided on the bottom surface of the control cabinet; the inverter signal wire passes through the inverter signal wire 379 inlet, one end is electrically connected to the inverter assembly 230, and the other end is electrically connected to the secondary circuit 360; the external communication wire is connected through the external communication wire inlet 380 and is electrically connected to the secondary circuit 360. The external communication wire is used to transmit external communication signals to the secondary circuit 360, and the inverter signal wire is used to transmit inverter signals to the secondary circuit 360.

[0061] The present utility model has the following beneficial effects: The string-type energy storage inverter cabinet provided by the present utility model includes a frame, an energy storage inverter module group, and a control cabinet. The frame is a hollow cuboid structure for accommodating the energy storage inverter module group and the control cabinet. An air inlet net plate is provided in the middle of the frame. Two groups of inverter modules and a control cabinet are arranged back to back in the frame. The inverter modules are arranged above the air inlet net plate in a hanging manner, and the control cabinet is arranged below the air inlet net plate. The length of the control cabinet is less than the length of the air inlet net plate. An air inlet is provided on the bottom surface of the inverter module, and an air outlet is provided on the top surface. The back-to-back hanging design of the inverter modules increases the power density, thereby increasing the capacity of the inverter power module in a single cabinet, facilitating maintenance. The design of the external frame, air inlet net plate, air inlet, and air outlet increases the air inlet and outlet areas and improves the heat dissipation capacity.

[0062] In addition, because the power density is increased, a smaller floor area can be used to achieve a larger power capacity, reducing the material cost of the cabinet body itself and its external connections. At the same time, the time and labor costs for repeated hoisting, installation, transportation, and packing are reduced.

[0063] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms of deformations without departing from the purpose of the present utility model and the scope protected by the claims. All of these fall within the protection scope of the present utility model.

Claims

1. A string-type energy storage inverter cabinet, which is used in combination with an energy storage battery cabinet and a transformer cabinet. It is characterized in that, It includes a frame (100), an energy storage inverter module and a control cabinet, where: The frame (100) is a hollow cuboid structure for accommodating the energy storage inverter module and the control cabinet; an air inlet net plate (110) is arranged along the circumferential direction of the frame in the middle of the frame (100); first slide rails and second slide rails are symmetrically arranged along the length direction of the frame (100) on the top surface of the frame (100). The energy storage inverter module includes a first inverter module (210) and a second inverter module (220). The first inverter module (210) is hung on the first slide rail, and the second inverter module (220) is hung on the second slide rail; both the first inverter module (210) and the second inverter module (220) include a plurality of inverter components (230); an air inlet is arranged on the bottom surface of the inverter component (230), an air outlet is arranged on the top surface, and an air duct is arranged inside. The control cabinet is arranged directly below the air inlet net plate (110), and the length of the control cabinet is less than the length of the air inlet net plate (110); the bottom of the control cabinet is fixed to the bottom surface of the frame (100); the control cabinet includes a first control cabinet (310) and a second control cabinet (320), and the first control cabinet (310) and the second control cabinet (320) are symmetrically arranged along the length direction of the frame (100); a DC circuit breaker component (330) and an AC circuit breaker component (340) are arranged from bottom to top in both the first control cabinet (310) and the second control cabinet (320); the DC circuit breaker component (330) includes a plurality of DC circuit breakers (331), and the AC circuit breaker component (340) includes a plurality of AC circuit breakers (341); an AC output interface is arranged on the left side surface of the control cabinet; a secondary circuit (360) is arranged on the right side surface of the control cabinet. The output end of the battery cluster in the energy storage battery cabinet is connected to the input end of the inverter component (230) through the DC circuit breaker (331), and the output end of the inverter component (230) is connected to the AC output interface through the AC circuit breaker (341); the AC output interface is electrically connected to the transformer in the transformer cabinet.

2. The string-type energy storage inverter cabinet according to claim 1, wherein The AC output interface includes an AC outgoing line port (351) and a docking copper bar (352), and the transformer is electrically connected to the docking copper bar (352) through the AC outgoing line port (351).

3. The string type energy storage inverter cabinet according to claim 1, characterized in that, A protective net (120) is arranged below the top surface of the frame, and the inverter component (230) has a waterproof function.

4. The string-type energy storage inverter cabinet according to claim 1, wherein, A door body is arranged on the right side surface of the control cabinet, and an emergency stop button (370) is arranged on the door body.

5. The string-type energy storage inverter cabinet according to claim 1, wherein, First door bodies are arranged on the front sides of both the first control cabinet (310) and the second control cabinet (320), and louvers (371) are arranged on the part of the first door body on the right side.

6. The string energy storage inverter cabinet according to claim 1, wherein, Lifting corner fittings (130) are arranged at the four corners of the top surface of the frame (100), and a transportation fixing interface (140) is also arranged on the frame (100).

7. The string-type energy storage inverter cabinet according to claim 1, wherein The bottom surface of the control cabinet is provided with a cabinet body installation and fixing interface (372), a grounding wire inlet (373), a DC power inlet (374), and a grounding bar (375); the bottom surface of the frame is provided with a grounding block (150).

8. The string type energy storage inverter cabinet according to claim 1, wherein The string-type energy storage inverter cabinet further includes an inverter component replacement dummy panel (240).

9. The string-type energy storage inverter cabinet according to claim 1, characterized in that The inverter component is electrically connected to the DC circuit breaker (331) and the AC circuit breaker (341) through a power cable (376). A wire tying bridge (377) is arranged below the inverter component (230), and the wire tying bridge (377) is used for supporting and fixing the power cable (376); a PG waterproof connector (378) is arranged on the inner wall of the top surface of the control cabinet, and the power cable (376) passes through the PG waterproof connector (378) and is electrically connected to the DC circuit breaker (331) and the AC circuit breaker (341).

10. The string-type energy storage inverter cabinet according to claim 1, wherein, An inverter signal wire inlet (379) is arranged above the control cabinet, and an external communication wire inlet (380) is arranged on the bottom surface of the control cabinet; the inverter signal wire passes through the inverter signal wire inlet (379), one end is electrically connected to the inverter component (230), and the other end is electrically connected to the secondary circuit (360); the external communication wire is connected through the external communication wire inlet (380) and is electrically connected to the secondary circuit (360).

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