Conflux cabinet

Abstract

The utility model discloses a confluence cabinet, which comprises a confluence cabinet body and a protection assembly, a first input copper bar group, a first output copper bar group, a second input copper bar group, a second output copper bar group and an isolating switch are arranged in the confluence cabinet body, and the first input copper bar group and the first output copper bar group are correspondingly arranged on two sides of the isolating switch along a first direction. And the switch is electrically connected with the isolating switch. And the second input copper bar group and the second output copper bar group are correspondingly arranged on two sides of the isolating switch along the first direction and are electrically connected with the isolating switch. And the first input copper bar group and the second input copper bar group are arranged at intervals along the second direction. And the isolating switch has a switch-on state and a switch-off state and is used for isolating the confluence cabinet from a power utilization system. The protection assembly comprises direct current fuses which are respectively arranged in the first input copper bar group and the second input copper bar group and are used for protecting circuits and equipment from being damaged by overcurrent, so that the safety and the reliability of the system are improved.

Description

Technical Field

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

[0002] Power systems include energy storage systems (such as lithium batteries), convergence devices, control systems, inverters, and other supporting equipment to fully utilize the energy storage device's power supply function. For large-scale grid-connected power generation systems, the energy storage system voltage must match the grid voltage. Given a fixed voltage, the more energy storage systems connected to the grid, the higher the system energy and the greater the current.

[0003] A merging device enables the converging of multiple energy storage systems. This device typically utilizes a combiner cabinet, which houses busbars, disconnectors, and other components. The current from multiple energy storage systems is combined on the busbars and then output to back-end equipment after passing through the disconnectors. Existing combiner cabinets typically only provide high-voltage insulation protection and lack reliability and safety features. Utility Model Content

[0004] In order to overcome the above shortcomings, the purpose of the present invention is to provide a combiner cabinet to solve the problems raised in the above background technology.

[0005] In order to achieve the above objectives, the technical solution adopted by the present invention is a combiner cabinet, wherein:

[0006] The combiner cabinet is internally provided with a first input copper bar group, a first output copper bar group, a second input copper bar group, a second output copper bar group, and an isolating switch. The first input copper bar group and the first output copper bar group are respectively arranged on either side of the isolating switch along the first direction and are electrically connected to the isolating switch. The second input copper bar group and the second output copper bar group are respectively arranged on either side of the isolating switch along the first direction and are electrically connected to the isolating switch. The first input copper bar group and the second input copper bar group are spaced apart along the second direction. The isolating switch has two states, on and off, for isolating the combiner cabinet from the power system.

[0007] The protection component includes a DC fuse, which is respectively arranged in the first input copper busbar group and the second input copper busbar to protect circuits and equipment from overcurrent damage. The first direction is perpendicular to the second direction.

[0008] The combiner cabinet provided by this utility model features two states of disconnect switches, one in the on and one in the off state, providing physical isolation between the combiner cabinet and the power system, enhancing safety. The design of the first and second input and output busbars provides more connection options and flexibility to accommodate diverse circuit configurations. DC fuses are incorporated into the first and second input busbars, respectively, ensuring that overcurrent is promptly cut off, protecting circuits and equipment from damage and improving system safety and reliability.

[0009] In some embodiments, the first input copper bar group includes a first input sub-copper bar, a second input sub-copper bar, a third input sub-copper bar, and a fourth input sub-copper bar. The first output copper bar group includes a first output sub-copper bar, a second output sub-copper bar, a third output sub-copper bar, and a fourth output sub-copper bar. The second input copper bar group includes a fifth input sub-copper bar, a sixth input sub-copper bar, a seventh input sub-copper bar, and an eighth input sub-copper bar. The second output copper bar group includes a fifth output sub-copper bar and a sixth output sub-copper bar. The first input sub-copper bar, the fifth input sub-copper bar, the fifth output sub-copper bar, and the third output sub-copper bar are all electrically connected to the disconnector.

[0010] By subdividing the input and output copper busbars into multiple sub-busbars, this technical solution allows for more flexible current management, facilitating maintenance and upgrades, and potentially improving system reliability and flexibility. Specific sub-busbar designs optimize circuit layout, reduce resistance and voltage drop, and improve energy efficiency. During maintenance, faulty busbars can be quickly located, shortening maintenance time and increasing efficiency.

[0011] In some embodiments, the protection component also includes a DC surge protector, which includes a first surge feedback line, a second surge feedback line, a third surge feedback line, and a fourth surge feedback line. The first surge feedback line is connected to the third output sub-copper bus line, the second surge feedback line is connected to the second output sub-copper bus line, the third surge feedback line is connected to the fifth output sub-copper bus line, and the fourth surge feedback line is connected to the sixth output sub-copper bus line.

[0012] Using the above technical solution, the DC surge protector has a fast response time and can react quickly to voltage surges, diverting or suppressing excess energy before it causes damage. By connecting the surge protector to a specific copper busbar, it can protect electrical and electronic equipment from damage caused by overvoltage transients, reduce equipment failures and safety accidents caused by surges, and improve overall safety.

[0013] In some embodiments, the tops of the fourth input sub-copper bar and the sixth input sub-copper bar are both provided with input-side insulating terminals. The tops of the second output sub-copper bar and the sixth output sub-copper bar are both provided with output-side insulating terminals.

[0014] By adopting the above technical solution, the insulated terminal provides good insulation performance, helps to reduce electromagnetic interference, improves the safety of electrical connections, and effectively prevents current leakage and accidental electric shock.

[0015] In some embodiments, the junction cabinet further includes wiring terminals and a DIN rail, wherein the wiring terminals are arranged above the DC surge protector, and the DIN rail is respectively arranged corresponding to the wiring terminals and the DC surge protector, and is fixed to the junction cabinet for being snap-fitted and fixed with the wiring terminals and the DC surge protector.

[0016] With the above technical solution, the DIN rail provides a standardized installation method, making the installation of terminal blocks and surge protectors quick and easy.

[0017] In some embodiments, the combiner cabinet is provided with a switch door on one side along the third direction for opening or closing the installation space. The switch door is provided with protective plates on both sides along the first direction for closing the combiner cabinet, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0018] This technical solution makes it easy to open and close the installation space with a door, making maintenance and repair more convenient, allowing for quick troubleshooting and necessary component replacement. The use of protective panels provides additional protection against dust, moisture, and other environmental factors, thereby enhancing the overall protection level of the combiner cabinet.

[0019] In some embodiments, the combiner cabinet further comprises an operating lever and a connecting rod. The operating lever is disposed on a side of the switch door along the third direction away from the isolating switch and is disposed corresponding to the isolating switch. The connecting rod extends along the third direction and passes through the switch door. One end of the connecting rod is connected to the operating lever, and the other end is nested with the isolating switch for switching the isolating switch on and off.

[0020] The above technical solution reduces the number of times the door needs to be opened and closed, as well as the number of times the disconnect switch comes into direct contact with it, thereby reducing the risk of electric shock. When the door is closed, the connecting rod nestles with the disconnect switch to connect and disconnect it. When the door is open, the connecting rod separates from the disconnect switch, making it easier to check the internal conditions of the combiner cabinet.

[0021] In some embodiments, the eighth input sub-copper busbar and the fourth output sub-copper busbar are both bent.

[0022] By adopting the above technical solution, the bent copper busbar can more effectively utilize the internal space of the combiner cabinet, making the installation more compact, reducing additional connection points, lowering contact resistance and failure rate, and improving circuit reliability.

[0023] In some embodiments, the combiner cabinet further includes a terminal fixture connected to the combiner cabinet, and the first input copper bar group, the first output copper bar group, the second input copper bar group, and the second output copper bar group are all insulated and disposed on the terminal fixture.

[0024] By adopting the above technical solution, the use of the terminal fixator can ensure that the copper busbar is firmly fixed, reduce the loose connection caused by mechanical vibration or impact, and improve the stability and reliability of the structure.

[0025] In some embodiments, the protective plate is made of flame-retardant polyvinyl chloride.

[0026] By adopting the above technical solution, polyvinyl chloride has good electrical insulation performance and flame retardancy, and is a low-cost material, suitable for use in electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a front view of an embodiment of a combiner cabinet of the present utility model;

[0028] Figure 2 for Figure 1 sectional view of

[0029] Figure 3 This is a schematic diagram of the internal structure of a combiner cabinet according to an embodiment of the present invention;

[0030] Figure 4 for Figure 3 sectional view of

[0031] In the picture:

[0032] 1. Combiner cabinet; 2. Terminal holder; 3. Wiring terminal; 4. DIN rail; 5. First input sub-copper busbar; 6. Second input sub-copper busbar; 7. Third input sub-copper busbar; 8. Fifth input sub-copper busbar; 9. Sixth input sub-copper busbar; 10. Seventh input sub-copper busbar; 11. Eighth input sub-copper busbar; 12. Fourth output sub-copper busbar; 13. Fifth output sub-copper busbar; 14. Sixth output sub-copper busbar; 15. Fourth input sub-copper busbar; 16. DC fuse; 17. Disconnector; 18. First output sub-copper busbar; 19. Third output sub-copper busbar; 20. Input-side insulation terminal; 21. Second output sub-copper busbar; 22. Output-side insulation terminal; 23. First surge feedback line 1; 24. Second surge feedback line; 25. Third surge feedback line; 26. Fourth surge feedback line; 27. DC surge protector; 28. Switch door; 29. ​​Protective plate; 30. Operating lever. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0034] refer to Figures 1 to 4 , Figure 1 A front view of a combiner cabinet provided by an embodiment of the present utility model is shown; Figure 2 for Figure 1 sectional view of Figure 2 A schematic diagram of the internal structure of a combiner cabinet provided by an embodiment of the present utility model is shown; Figure 4 for Figure 3 sectional view of .

[0035] like Figures 1 to 4 As shown, the technical solution provided by the present application is a combiner cabinet, comprising a combiner cabinet body 1 and a protection assembly, wherein a first input copper bar group, a first output copper bar group, a second input copper bar group, a second output copper bar group and an isolating switch 17 are arranged inside the combiner cabinet body 1, and the first input copper bar group and the first output copper bar group are correspondingly arranged at the isolating switch 17 along the first direction ( Figure 1 The second input copper bar group and the second output copper bar group are respectively provided on both sides of the isolating switch 17 along the first direction and are electrically connected to the isolating switch 17. The first input copper bar group and the second output copper bar group are respectively provided on both sides of the isolating switch 17 along the second direction ( Figure 1 The isolating switch 17 has two states, on and off, and is used to isolate the combiner cabinet from the power system.

[0036] The protection component includes a DC fuse 16, which is respectively arranged in the first input copper busbar group and the second input copper busbar to protect the circuit and equipment from overcurrent damage. The first direction is perpendicular to the second direction.

[0037] The combiner cabinet provided herein features two states: on and off, with the isolating switch 17 providing physical isolation between the combiner cabinet and the power system, enhancing safety. The design of the first and second input and output busbars provides more connection options and flexibility to accommodate diverse circuit configurations. The inclusion of DC fuses 16 within the first and second input busbars, respectively, allows for timely current interruption in the event of an overcurrent, protecting the circuit and equipment from damage and improving system safety and reliability.

[0038] In some embodiments, reference Figures 1 to 4 The first input copper bar group includes the first input sub-copper bar 5, the second input sub-copper bar 6, the third input sub-copper bar 7, and the fourth input sub-copper bar 15. The first output copper bar group includes the first output sub-copper bar 18, the second output sub-copper bar 21, the third output sub-copper bar 19, and the fourth output sub-copper bar 12. The second input copper bar group includes the fifth input sub-copper bar 8, the sixth input sub-copper bar 9, the seventh input sub-copper bar 10, and the eighth input sub-copper bar 11. The second output copper bar group includes the fifth output sub-copper bar 13 and the sixth output sub-copper bar 14. The first input sub-copper bar 5, the fifth input sub-copper bar 8, the fifth output sub-copper bar 13, and the third output sub-copper bar 19 are all electrically connected to the disconnector 17.

[0039] For example, by breaking down the input and output copper busbars into multiple sub-busbars, current management can be more flexibly managed, facilitating maintenance and upgrades, while potentially improving system reliability and flexibility. Specific sub-busbar designs can optimize circuit layout, reduce resistance and voltage drop, improve energy efficiency, and quickly locate problematic copper busbars during maintenance, shortening maintenance time and increasing efficiency.

[0040] In some embodiments, reference Figures 1 to 4 The protection component also includes a DC surge protector 27, which includes a first surge feedback line 23, a second surge feedback line 24, a third surge feedback line 25 and a fourth surge feedback line 26. The first surge feedback line 23 is connected to the third output sub-copper bus 19, the second surge feedback line 24 is connected to the second output sub-copper bus 21, the third surge feedback line 25 is connected to the fifth output sub-copper bus 13, and the fourth surge feedback line 26 is connected to the sixth output sub-copper bus 14.

[0041] For example, the DC surge protector 27 has a fast response time and can react quickly to voltage surges, transferring or suppressing excess energy before it causes damage. By connecting the surge protector to a specific copper busbar, electrical and electronic equipment can be protected from damage caused by overvoltage transients, reducing equipment failures and safety accidents caused by surges, and improving overall safety.

[0042] In some embodiments, reference Figures 1 to 4 The top of the fourth input sub-copper bar 15 and the top of the sixth input sub-copper bar 9 are both provided with input-side insulating terminals 20. The top of the second output sub-copper bar 21 and the top of the sixth output sub-copper bar 14 are both provided with output-side insulating terminals 22.

[0043] Illustratively, the insulating terminal provides good insulation performance, helps reduce electromagnetic interference, improves the safety of electrical connections, and effectively prevents current leakage and accidental electric shock.

[0044] In some embodiments, reference Figures 1 to 4 The junction cabinet 1 also includes a wiring terminal 3 and a DIN rail 4. The wiring terminal 3 is arranged above the DC surge protector 27. The DIN rail 4 is respectively arranged corresponding to the wiring terminal 3 and the DC surge protector 27, and is fixed to the junction cabinet 1 for being snap-fitted and fixed with the wiring terminal 3 and the DC surge protector 27.

[0045] For example, the DIN rail 4 provides a standardized installation method, making the installation of the terminal block 3 and the surge protector quick and easy.

[0046] In some embodiments, reference Figures 1 to 4 , the junction box 1 is along the third direction ( Figure 2 A switch door 28 is provided on one side (shown in the Y direction) for opening or closing the installation space. Protective plates 29 are provided on both sides of the switch door 28 along the first direction for sealing the combiner cabinet 1. The first, second, and third directions are perpendicular to each other.

[0047] For example, the switch door 28 facilitates opening and closing the installation space, making maintenance and repair more convenient, allowing for quick troubleshooting and necessary component replacement. The use of the protective plate 29 provides additional protection against damage to the equipment caused by dust, moisture, and other environmental factors, thereby improving the overall protection level of the combiner cabinet.

[0048] In some embodiments, reference Figures 1 to 4The combiner cabinet 1 further includes an operating lever 30 and a connecting rod. The operating lever 30 is located on the side of the switch door 28 along the third direction, away from the disconnector 17, and is corresponding to the disconnector 17. The connecting rod extends along the third direction and passes through the switch door 28. One end is connected to the operating lever 30, and the other end is nested with the disconnector 17 for switching the disconnector 17 on and off.

[0049] For example, the design of the operating lever 30 and connecting rod can reduce the number of times the door 28 is opened and closed, as well as the number of times the disconnector 17 is directly contacted, thereby reducing the risk of electric shock. When the door 28 is closed, the connecting rod and the disconnector 17 are nested and engaged to connect and disconnect the disconnector 17. When the door 28 is open, the connecting rod separates from the disconnector 17, facilitating inspection of the internal conditions of the combiner cabinet 1.

[0050] In some embodiments, reference Figures 1 to 4 The eighth input sub-copper busbar 11 and the fourth output sub-copper busbar 12 are both bent.

[0051] For example, the bent copper busbar can more effectively utilize the internal space of the combiner cabinet, making the installation more compact, reducing additional connection points, lowering contact resistance and failure rate, and improving circuit reliability.

[0052] In some embodiments, reference Figures 1 to 4 The junction cabinet 1 also includes a terminal fixture 2 connected to the junction cabinet 1 , and the first input copper bar group, the first output copper bar group, the second input copper bar group, and the second output copper bar group are all insulated and arranged on the terminal fixture 2 .

[0053] For example, the use of the terminal holder 2 can ensure that the copper busbar is firmly fixed, reduce loose connections caused by mechanical vibration or impact, and improve the stability and reliability of the structure.

[0054] In some embodiments, the protective plate 29 is made of flame-retardant polyvinyl chloride.

[0055] For example, polyvinyl chloride has good electrical insulation properties and flame retardancy, and is a relatively low-cost material, making it suitable for use in electrical equipment.

[0056] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A combiner cabinet, characterized in that: include: A combiner cabinet is provided with a first input copper bar group, a first output copper bar group, a second input copper bar group, a second output copper bar group and an isolating switch. The first input copper bar group and the first output copper bar group are correspondingly arranged on both sides of the isolating switch along the first direction and are electrically connected to the isolating switch; the second input copper bar group and the second output copper bar group are correspondingly arranged on both sides of the isolating switch along the first direction and are electrically connected to the isolating switch; the first input copper bar group and the second input copper bar group are spaced apart along the second direction; the isolating switch includes two states, on and off, for isolating the combiner cabinet from the power system; The protection component includes a DC fuse, which is respectively arranged in the first input copper busbar group and the second input copper busbar to protect circuits and equipment from overcurrent damage. The first direction is perpendicular to the second direction.

2. The combiner cabinet according to claim 1, characterized in that: The first input copper bar group includes a first input sub-copper bar, a second input sub-copper bar, a third input sub-copper bar and a fourth input sub-copper bar; the first output copper bar group includes a first output sub-copper bar, a second output sub-copper bar, a third output sub-copper bar and a fourth output sub-copper bar; the second input copper bar group includes a fifth input sub-copper bar, a sixth input sub-copper bar, a seventh input sub-copper bar and an eighth input sub-copper bar; the second output copper bar group includes a fifth output sub-copper bar and a sixth output sub-copper bar; the first input sub-copper bar, the fifth input sub-copper bar, the fifth output sub-copper bar and the third output sub-copper bar are all electrically connected to the disconnector.

3. The combiner cabinet according to claim 2, characterized in that: The protection component also includes a DC surge protector, which includes a first surge feedback line, a second surge feedback line, a third surge feedback line and a fourth surge feedback line. The first surge feedback line is connected to the third output sub-copper bus line, the second surge feedback line is connected to the second output sub-copper bus line, the third surge feedback line is connected to the fifth output sub-copper bus line, and the fourth surge feedback line is connected to the sixth output sub-copper bus line.

4. The combiner cabinet according to claim 3, characterized in that: The top of the fourth input sub-copper bar and the top of the sixth input sub-copper bar are both provided with input side insulating terminals; the top of the second output sub-copper bar and the top of the sixth output sub-copper bar are both provided with output side insulating terminals.

5. The combiner cabinet according to claim 3, characterized in that: The junction cabinet also includes wiring terminals and DIN rails. The wiring terminals are arranged above the DC surge protector. The DIN rails are respectively arranged corresponding to the wiring terminals and the DC surge protector, and are fixed to the junction cabinet for being snap-fitted and fixed with the wiring terminals and the DC surge protector.

6. The combiner cabinet according to claim 5, characterized in that: The junction cabinet is provided with a switch door on one side along the third direction for opening or closing the installation space; the switch door is provided with protective plates on both sides along the first direction for closing the junction cabinet, and the first direction, the second direction and the third direction are perpendicular to each other.

7. The combiner cabinet according to claim 6, characterized in that: The junction cabinet also includes an operating rod and a connecting rod. The operating rod is arranged on a side of the switch door along the third direction away from the isolating switch and is arranged corresponding to the isolating switch; the connecting rod extends along the third direction, passes through the switch door, one end is connected to the operating rod, and the other end is nested with the isolating switch for connecting and disconnecting the isolating switch.

8. The combiner cabinet according to claim 2, characterized in that: The eighth input sub-copper busbar and the fourth output sub-copper busbar are both bent.

9. The combiner cabinet according to claim 1, characterized in that: The combiner cabinet further includes a terminal fixture connected to the combiner cabinet, and the first input copper bar group, the first output copper bar group, the second input copper bar group, and the second output copper bar group are all insulated and arranged on the terminal fixture.

10. The combiner cabinet according to claim 6, characterized in that: The protective plate is made of flame-retardant polyvinyl chloride.

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