CN223680573U - junction box - Google Patents

Abstract

This utility model discloses a combiner box, including a box body. The box body includes a main body and a cover plate. The main body is provided with a receiving cavity, and a first partition is provided inside the receiving cavity to divide the receiving cavity into multiple installation cavities. Each installation cavity is provided with an isolating switch, a fuse, and a bus assembly. The isolating switch includes an operating handle and an input terminal and an output terminal arranged opposite each other. The bus assembly includes an input-side bus group and an output-side bus group. The input-side bus group is electrically connected to the input terminal of the isolating switch, and the output-side bus group is electrically connected to the output terminal of the isolating switch. The fuse is electrically connected to the input-side bus group. The cover plate is placed on the receiving cavity and fixedly connected to the main body. The cover plate is provided with a clearance opening, through which the operating handle extends outward from the main body. The combiner box of this application solves the problem that the various components of the combiner box do not have dedicated cabinets for installation and the unreasonable layout makes it difficult for the combiner box to meet electrical safety regulations.

Description

Collecting box

Technical Field

The utility model relates to the technical field of confluence energy storage, in particular to a confluence box.

Background

At present, a Battery PACK (PACK) high-voltage cable in an energy storage market is mainly connected to a boost cabin PCS (Power Conversion System, energy storage converter) side through isolating switches, fuses, bus bars and other components in a bus box (control cabin) in a converging mode, however, the isolating switches, fuses, bus bars and other components in the bus box part are not installed in a special cabinet body, are all in the bus box in a bulk mode, and the layout of all the components in the bus box is unreasonable, so that the electric use safety specification is difficult to meet.

Disclosure of utility model

The utility model aims to provide a junction box, which at least solves the problems that each part in the junction box is not provided with a special cabinet body, and the junction box is difficult to meet the electrical use safety standard due to unreasonable layout.

According to an aspect of the present utility model, there is provided a junction box including:

The box body comprises a main body and a cover plate, wherein a containing cavity is formed in the main body, a first partition plate is arranged in the containing cavity, the containing cavity is divided into a plurality of installation cavities by the first partition plate, an isolation disconnecting link, a fuse and a busbar assembly are arranged in each installation cavity, the isolation disconnecting link comprises an operation handle, an input end and an output end which are oppositely arranged, the busbar assembly comprises an input side busbar group and an output side busbar group, the input side busbar group comprises a first positive busbar, a second positive busbar and a negative busbar, the second positive busbar and the negative busbar are respectively and electrically connected with the input end of the isolation disconnecting link, the output side busbar group is electrically connected with the output end of the isolation disconnecting link, and the fuse is respectively and electrically connected with the first positive busbar and the second positive busbar;

The cover plate is covered in the accommodating cavity and fixedly connected with the main body, an avoidance opening is formed in the cover plate, and the operating handle penetrates through the avoidance opening to extend to the outside of the main body.

Further, the box is internally provided with a connecting component electrically connected with an external PACK power cable, the connecting component comprises an anode cable and a cathode cable, the first anode bus bar is electrically connected with the anode of the external PACK power cable through the anode cable, and the cathode bus bar is electrically connected with the cathode of the external PACK power cable through the cathode cable.

Further, the output side bus bar group includes a first output bus bar and a second output bus bar, which are electrically connected with external PCS side cables, respectively.

Further, the inner wall of the installation cavity is provided with a second partition board, the first output bus bar and the second output bus bar are both arranged on the second partition board, and third partition boards are arranged between the first output bus bar and the inner wall of the installation cavity and between the second output bus bar and the inner wall of the installation cavity.

Further, the second separator includes an epoxy plate, and the third separator includes an epoxy plate.

Further, a fourth partition plate is arranged on the inner wall of the mounting cavity, and a fifth partition plate is arranged between the first positive electrode bus bar and the negative electrode bus bar, between the fuse and the negative electrode bus bar, and between the second positive electrode bus bar and the negative electrode bus bar.

Further, the first separator includes an epoxy plate, the fourth separator includes an epoxy plate, and the fifth separator includes an epoxy plate.

Further, the junction box further comprises a box door, the box door cover is arranged on the cover plate and movably connected with the main body, and a transparent PC board for observing the working state of the operating handle is arranged on the box door.

Further, the cover plate comprises a first cover plate and a second cover plate, the avoidance opening is formed in the first cover plate, the first cover plate is fixedly connected with the box body, the second cover plate is fixedly connected with the box body, and a preset gap is formed between the first cover plate and the second cover plate.

Further, the main body is arranged into a sheet metal bending integrated structure.

In the utility model, the accommodating cavity of the box body of the collecting box is reasonably divided into a plurality of mounting cavities by arranging the first partition plate in the accommodating cavity. Isolation knife switches, fuses and busbar assemblies are arranged in each installation cavity, so that each part has a special installation space, and confusion and unsafe caused by bulk layout are avoided. In the installation cavity, with isolation switch as the benchmark, with busbar group and fuse rational layout at isolation switch's input and output, improved the compact of the incasement overall arrangement that converges, space utilization is high, has optimized the overall structure of converging the case, both satisfied the demand of electrical connection, has guaranteed the mutual independence of individual part, has improved the overall security and the reliability of converging the case. Through setting up the apron lid and establish at the holding chamber and set up on the apron and dodge the mouth in order to extend the operating handle who keeps apart the switch outside the holding chamber through dodging the mouth, make things convenient for operating personnel to operate the isolation switch under the condition of not opening the apron, ensured the security of operation simultaneously. The double guarantee of the internal structure of the junction box is realized through the combination of the cover plate and the box door, so that misoperation of external personnel can be prevented, and the safety of the junction box is obviously improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

Fig. 1 is a schematic structural view of a junction box according to an embodiment of the present utility model;

fig. 2 is a schematic view of an internal structure of a junction box according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a bus box when a box door is not installed according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a bus box when a box door is installed according to an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. the main body, 11, the accommodating cavity, 111, the mounting cavity, 12, the first partition board, 13, the isolating knife switch, 131, the operating handle, 132, the input end, 133, the output end, 14, the fuse, 15, the busbar assembly, 151, the input side busbar group, 1511, the first positive busbar, 1512, the second positive busbar, 1513, the negative busbar, 152, the output side busbar group, 1521, the first output busbar, 1522, the second output busbar, 16, the connecting assembly, 161, the positive cable, 162, the negative cable, 17, the second partition board, 18, the third partition board, 191, the fourth partition board, 192, the fifth partition board, 20, the cover board, 21, the first cover board, 211, the avoidance opening, 22, the second cover board, 23, the preset gap, 30, the box door, 31, the transparent PC board, 40, the high-voltage danger identification, 50, the knife switch operation instruction identification.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1 to 4, according to an embodiment of the present application, there is provided a junction box including a box body. The box includes main part 10 and apron 20, be provided with accommodation chamber 11 on the main part 10, be provided with first baffle 12 in the accommodation chamber 11, first baffle 12 divides accommodation chamber 11 into a plurality of installation cavity 111, all be provided with isolation switch 13 in each installation cavity 111, fuse 14 and busbar subassembly 15, isolation switch 13 includes operating handle 131 and the input 132 and the output 133 of relative setting, busbar subassembly 15 includes input side busbar group 151 and output side busbar group 152, input side busbar group 151 includes first positive busbar 1511, second positive busbar 1512 and negative busbar 1513, second positive busbar 1512, negative busbar 1513 is connected with the input 132 electricity of isolation switch 13 respectively, output side busbar group 152 is connected with the output 133 electricity of isolation switch 13, fuse 14 is connected with first positive busbar 1511, second positive busbar 1512 respectively. The cover plate 20 is covered in the accommodating cavity 11 and fixedly connected with the main body 10, the cover plate 20 is provided with an avoidance port 211, and the operating handle 131 passes through the avoidance port 211 and extends to the outside of the main body 10.

Specifically, the accommodating cavity 11 is divided into a plurality of mounting cavities 111 by the first partition 12, and each mounting cavity 111 is internally provided with the isolation switch 13, the fuse 14 and the busbar assembly 15, so that the busbar box can be divided into a plurality of branch circuits, each branch circuit is not interfered with each other, for example, the busbar box of the embodiment shown in fig. 2 is provided with two mounting cavities 111, and each electrical element in the two mounting cavities 111 forms different branch circuits so as to realize the busbar of different branch circuits. In the combiner box, the isolation disconnecting link 13 is used for isolating and switching the circuit, and the on-off of the circuit can be controlled through the operation handle 131 on the isolation disconnecting link 13, so that the isolation or connection of each branch circuit can be realized, and when maintenance is required, the circuit of the corresponding branch can be switched through the operation handle 131 of the isolation disconnecting link 13. And the operation handle 131 passes through the avoidance port 211 on the cover plate 20 and extends to the outside, so that the isolation disconnecting link 13 can be operated without opening the whole junction box body, and the convenience and safety of the isolation disconnecting link are improved. The input side busbar group 151 is electrically connected with the input end 132 of the isolation switch 13, the output side busbar group 152 is electrically connected with the output end 133 of the isolation switch 13, and the fuse 14 is arranged at the input side busbar group 151, so that overcurrent protection and multiple busbar actions of a circuit can be realized, and the circuit layout in the mounting cavity 111 is reasonable and clear, so that the busbar box layout is more compact, and the mounting space of the busbar box can be saved while the function of the busbar box is ensured.

Further, a connection assembly 16 electrically connected to an external PACK (battery PACK) power cable is further provided in the case, the connection assembly 16 includes a positive electrode cable 161 and a negative electrode cable 162, the first positive electrode bus 1511 is electrically connected to the positive electrode of the external PACK power cable through the positive electrode cable 161, and the negative electrode bus 1513 is electrically connected to the negative electrode of the external PACK power cable through the negative electrode cable. It will be appreciated that the external battery pack power cable of this embodiment is electrically connected to the battery pack, and that the external battery pack power cable of this embodiment includes a battery pack high voltage cable having a high current carrying capacity. Through setting up coupling assembling 16 including anodal cable 161 and negative pole cable 162, realized that first anodal busbar 1511 and negative pole busbar 1513 are connected with the direct electricity of outside battery package power cable, reduced the intermediate link in the electric energy transmission process, reduced the energy loss, improved electric energy transmission efficiency. Meanwhile, as special cables are adopted for connection, compared with other connection modes (such as a wiring terminal, a plug connector and the like), the electric connection is more reliable, and circuit faults caused by poor contact or looseness and the like are reduced.

Further, the output-side bus bar group 152 includes a first output bus bar 1521 and a second output bus bar 1522, and the first output bus bar 1521 and the second output bus bar 1522 are electrically connected to external PCS (energy storage converter) side cables, respectively.

By arranging the output-side bus bar group 152 as the first output bus bar 1521 and the second output bus bar 1522 and electrically connected with the cables of the external energy storage converters respectively, the two independent output bus bars allow the electric energy of the single branch circuit to be more flexibly distributed to two different energy storage converters from the bus box, the distribution proportion of the electric energy can be adjusted according to actual needs, and the requirements of different loads or application scenes can be met. As the scale of the power system increases or the load demand changes, more energy storage converters need to be added, and by providing two output buses, the power system can be more easily expanded or adjusted to adapt to future changes. For example, an additional energy storage converter may be conveniently added and connected to the second output bus to expand the capacity of the system. In critical application scenarios such as data centers, hospitals, etc., the reliability requirements for the supply of electrical energy are extremely high. By providing two independent output buses and connecting with different energy storage converters, redundant supply of electrical energy can be achieved. If one of the energy storage converters or the output bus fails, the other energy storage converter or the output bus can still continue to work, so that continuous power supply of the system is ensured. The two output buses are respectively connected with different energy storage converter cables, so that the transmission capacity of the cables can be utilized more effectively, and the loss in the electric energy transmission process is reduced. Meanwhile, the balance of the loads corresponding to the energy storage converters is facilitated, and the electric energy transmission efficiency of the whole system is improved.

Referring to fig. 2, the inner wall of the installation cavity 111 is provided with a second partition 17, the first output bus 1521 and the second output bus 1522 are both disposed on the second partition 17, and a third partition 18 is disposed between the first output bus 1521 and the inner wall of the installation cavity 111 and between the second output bus 1522 and the inner wall of the installation cavity 111. The second separator 17 serves to separate the first output bus 1521 from the inner wall of the installation cavity 111 and the second output bus 1522 from the inner wall of the installation cavity 111, so as to prevent the first output bus 1521 and the second output bus 1522 from contacting the inner wall of the installation cavity 111, thereby not only preventing potential physical damage such as scratches or impacts, but also reducing electrical interference or short-circuit risk possibly caused by direct contact, and thus enhancing safety and stability of the system. The third partition 18 separates the first output bus 1521 from the second output bus 1522 in the mounting cavity 111, so as to electrically isolate the first output bus 1521 from the second output bus 1522, reduce electrical interference between the first output bus 1521 and the second output bus 1522, and improve safety of the bus box.

Further, the second separator 17 includes an epoxy plate, and the third separator 18 includes an epoxy plate.

Referring to fig. 2, a fourth separator 191 is disposed on the inner wall of the mounting cavity 111, and a fifth separator 192 is disposed between the first positive bus bar 1511 and the negative bus bar 1513, between the fuse 14 and the negative bus bar 1513, and between the second positive bus bar 1512 and the negative bus bar 1513, respectively, on the fourth separator 191, the first positive bus bar 1511, the fuse 14, the second positive bus bar 1512, and the negative bus bar 1513. The fourth separator 191 is used to separate the first positive bus bar 1511, the second positive bus bar 1512 and the negative bus bar 1513 from the inner wall of the mounting cavity 111, so that the first positive bus bar 1511, the second positive bus bar 1512 and the negative bus bar 1513 can be effectively isolated from the inner wall of the mounting cavity, and electrical insulation and physical protection are enhanced. The fifth separator 192 performs physical isolation and electrical isolation between the positive bus input circuit composed of the first positive bus 1511, the fuse 14 and the second positive bus 1512 and the negative bus input circuit composed of the negative bus 1513, so as to effectively separate the circuits of the positive and negative poles, avoid the risk of short circuit caused by improper circuit layout or external factors, not only improve the safety of the bus box, but also reduce the probability of failure caused by mutual interference of the circuits. The fifth separator 192 provides an additional electrical insulation barrier that further enhances the isolation between the positive and negative polarity circuits, preventing electrical leakage and reducing electromagnetic interference.

Further, the first separator 12 includes an epoxy plate, the fourth separator 191 includes an epoxy plate, and the fifth separator 192 includes an epoxy plate.

In the above embodiments, the first separator 12, the second separator 17, the third separator 18, the fourth separator 191, and the fifth separator 192 are all epoxy plates having extremely high electrical insulation properties, which are stable even in a high humidity or high temperature environment, and which are capable of effectively preventing electrical leakage and short circuits between circuits. And the epoxy plate has high hardness and impact resistance, and can bear larger mechanical load. Therefore, the material can be used as an insulating material, and can also provide necessary mechanical support to protect the circuit from physical damage. The epoxy board has good resistance to chemicals such as acid, alkali, organic solvent and the like, and can keep stable performance in the scene of complex chemical environment or corrosive substances, thereby ensuring long-term reliable operation of the circuit. The epoxy plate can withstand high temperature environment, has high thermal deformation temperature and can be used for a long time under the condition of about 200 ℃. The epoxy board is lighter in weight, is convenient for technological processing such as cutting, drilling and polishing, and can meet the layout of all electric elements in the bus box.

Further, the combiner box further comprises a box door 30, the box door 30 is covered on the cover plate 20 and is movably connected with the main body 10, and a transparent PC board 31 for observing the working state of the operating handle is arranged on the box door 30. The box door 30 provides a closed protective environment for the internal components of the combiner box, not only can avoid misoperation of external staff or external personnel, but also effectively prevents invasion of external factors such as dust, moisture, insects and the like, and ensures normal operation and long-term stability of the internal electrical components. The position of the transparent PC board 31 on the box door 30 just corresponds to the operating handle 131 of the isolation switch 13 when the box door 30 is in a closed state, and the transparent PC board allows an operator to directly observe the working state of the operating handle without opening the box door, so that the convenience of operation is improved, and meanwhile, the safety risk possibly brought by frequently opening and closing the box door is reduced.

Further, the cover 20 includes a first cover 21 and a second cover 22, the avoiding opening 211 is located on the first cover 21, the first cover 21 is fixedly connected with the main body 10, the second cover 22 is fixedly connected with the main body 10, and a predetermined gap 23 is formed between the first cover 21 and the second cover 22.

Referring to fig. 3, the area covered by the first cover plate 21 is the other area except for the output side busbar set 152 in the accommodating cavity 11, the area covered by the second cover plate 22 is the area of the output side busbar set 152 in the accommodating cavity 11, and the output side busbar set 152 is electrically connected with an external energy storage converter, so that the wiring operation of the circuit is more frequent, and the safety of the busbar box is improved by separately arranging the second cover plate 22 to cover the area of the output side busbar set 152. The first cover plate 21 is provided with a predetermined gap 23 between the second cover plate 22, and the predetermined gap 23 can realize an air-permeable effect, and can prevent the deformation of the junction box due to thermal expansion and radiate heat to the junction box.

Further, the main body 10 is provided as a sheet metal bending integrated structure. The sheet metal bending integrated structure does not need to be independently molded, so that the production and manufacturing cost of the junction box can be saved. The sheet metal bending integrated structure can also effectively resist external pressure and impact, improve the overall strength and stability, and ensure that the bus box can keep a stable running state in various environments. In this embodiment, the high-voltage hazard warning sign 40 is provided on the door 30, and the high-voltage hazard warning sign 40 and the knife switch operation instruction sign 50 are provided on the cover 20. The high-pressure hazard warning sign 40 can enhance the safety awareness of the operator, and the visual warning effectively prevents safety accidents caused by misoperation or neglecting high-pressure hazards. The knife switch operation instruction mark 50 ensures that an operator can accurately understand and execute the correct operation flow of the knife switch, and improves the standardization and the efficiency of the operation.

Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A combiner box, comprising:

The box body comprises a main body (10) and a cover plate (20), wherein a containing cavity (11) is formed in the main body (10), a first partition plate (12) is arranged in the containing cavity (11), the containing cavity (11) is divided into a plurality of mounting cavities (111) by the first partition plate (12), an isolating switch (13), a fuse (14) and a bus bar assembly (15) are arranged in each mounting cavity (111), the isolating switch (13) comprises an operating handle (131) and an input end (132) and an output end (133) which are arranged oppositely, the bus bar assembly (15) comprises an input side bus bar group (151) and an output side bus bar group (152), the input side bus bar group (151) comprises a first positive bus bar (1511), a second positive bus bar (1512) and a negative bus bar (1513), the second positive bus bar (1512) and the negative bus bar (3) are respectively electrically connected with the input end (132) of the isolating switch (13), and the output side bus bar (1511) of the isolating switch (13) are electrically connected with the second bus bar (1511);

The cover plate (20) is covered in the accommodating cavity (11) and is fixedly connected with the main body (10), an avoidance opening (211) is formed in the cover plate (20), and the operating handle (131) penetrates through the avoidance opening (211) to extend to the outside of the main body (10).

2. The combiner box according to claim 1, wherein a connection assembly (16) electrically connected to an external PACK power cable is further provided in the box, the connection assembly (16) comprising a positive cable (161) and a negative cable (162), the first positive bus bar (1511) being electrically connected to the positive of the external PACK power cable by the positive cable (161), the negative bus bar (1513) being electrically connected to the negative of the external PACK power cable by the negative cable (162).

3. The junction box according to claim 1, wherein the output side junction box (152) comprises a first output junction box (1521) and a second output junction box (1522), the first output junction box (1521) and the second output junction box (1522) being electrically connected to external PCS side cables, respectively.

4. A junction box according to claim 3, characterized in that the inner wall of the mounting cavity (111) is provided with a second separator (17), the first output busbar (1521) and the second output busbar (1522) are both arranged in the second separator (17), and a third separator (18) is arranged between the first output busbar (1521) and the inner wall of the mounting cavity (111) and between the second output busbar (1522) and the inner wall of the mounting cavity (111).

5. The header tank of claim 4, wherein the second separator (17) comprises an epoxy plate and the third separator (18) comprises an epoxy plate.

6. The bus box of claim 1, wherein a fourth separator (191) is disposed on an inner wall of the mounting cavity (111), the first positive bus bar (1511), the fuse (14), the second positive bus bar (1512), and the negative bus bar (1513) are disposed on the fourth separator (191), and a fifth separator (192) is disposed between the first positive bus bar (1511) and the negative bus bar (1513), between the fuse (14) and the negative bus bar (1513), and between the second positive bus bar (1512) and the negative bus bar (1513).

7. The header tank of claim 6, wherein the first separator (12) comprises an epoxy plate, the fourth separator (191) comprises an epoxy plate, and the fifth separator (192) comprises an epoxy plate.

8. The combiner box according to claim 1, further comprising a box door (30), wherein the box door (30) is covered on the cover plate (20) and is movably connected with the main body (10), and a transparent PC board (31) for observing the working state of the operating handle (131) is arranged on the box door (30).

9. The combiner box according to claim 1, wherein the cover plate (20) comprises a first cover plate (21) and a second cover plate (22), the avoiding opening (211) is located in the first cover plate (21), the first cover plate (21) is fixedly connected with the box body, the second cover plate (22) is fixedly connected with the box body, and a predetermined gap (23) is formed between the first cover plate (21) and the second cover plate (22).

10. The combiner box according to any one of claims 1 to 9, wherein the main body (10) is provided as a sheet metal bending integral structure.