Multi-machine parallel junction cabinet and energy storage all-in-one machine

Abstract

The utility model provides a multi-machine parallel confluence cabinet and an energy storage all-in-one machine, and the multi-machine parallel confluence cabinet comprises a cabinet body which is internally provided with an accommodation cavity; the PCS switches are arranged in the containing cavity, and the PCS switches are arranged in at least two rows in the first direction; a plurality of busbars, each PCS switch is correspondingly provided with at least two busbars, the plurality of busbars are arranged along a first direction or a second direction, the busbars are arranged between the inner wall of the cabinet body and the PCS switches, and the projections of the busbars and the PCS switches in the second direction at least partially coincide; and a plurality of connecting bars, each PCS switch is correspondingly provided with at least one connecting bar, the connecting bars are in one-to-one correspondence with the busbars, one end of each connecting bar is electrically connected with the PCS switch, and the other end of each connecting bar is electrically connected with the corresponding busbar. According to the utility model, the space utilization rate is high, the copper bar path is short, and the purpose of convenient cable connection is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage machines, in particular to a multi-machine parallel junction box and an integrated energy storage machine. Background Art

[0002] In recent years, the global energy storage industry has experienced rapid growth, particularly in China, where energy storage technology has become a key pillar of the new energy industry. Energy storage technology provides a solid foundation for stabilizing the power grid and building new power systems. Industrial and commercial energy storage combiner cabinets are a companion product to integrated energy storage systems. They primarily combine the AC power of multiple integrated energy storage systems and incorporate integrated energy meters to calculate energy storage revenue. Currently, combiner cabinets suffer from low space utilization. Utility Model Content

[0003] The main purpose of the utility model is to provide a multi-machine parallel combiner cabinet, aiming to solve the problem of low cabinet space utilization in the existing combiner cabinet.

[0004] To achieve the above-mentioned purpose, the present invention provides a multi-machine parallel combiner cabinet, which includes:

[0005] A cabinet body, wherein a receiving cavity is formed in the cabinet body;

[0006] A plurality of PCS switches are disposed in the accommodating cavity, wherein the plurality of PCS switches are arranged in at least two rows along a first direction;

[0007] a plurality of busbars, at least two busbars corresponding to each PCS switch, the plurality of busbars being arranged along a first direction or a second direction, and the at least two busbars being arranged between an inner wall of the cabinet and the corresponding PCS switch, and projections of the at least two busbars and the corresponding PCS switch in the second direction at least partially overlapping;

[0008] A plurality of connection bars, at least one connection bar corresponding to each PCS switch, the connection bars corresponding to the bus bars one-to-one, one end of the connection bar being electrically connected to the PCS switch, and the other end being electrically connected to the corresponding bus bar.

[0009] Optionally, each of the PCS switches is provided with four bus bars, including a first bus bar, a second bus bar, a third bus bar and a fourth bus bar, the first bus bar and the second bus bar are arranged along the first direction, the first bus bar and the third bus bar are arranged along the second direction, the third bus bar and the fourth bus bar are arranged along the first direction, and the second bus bar and the fourth bus bar are arranged along the second direction.

[0010] The four buses are staggered in different directions to maximize the use of space in two directions.

[0011] Optionally, each PCS switch is correspondingly provided with four connection bars, including a first connection bar, a second connection bar, a third connection bar and a fourth connection bar; one end of the first connection bar is electrically connected to the corresponding PCS switch, and the other end is electrically connected to the first bus; one end of the second connection bar is electrically connected to the corresponding PCS switch, and the other end is electrically connected to the second bus; one end of the third connection bar is electrically connected to the corresponding PCS switch, and the other end is electrically connected to the third bus; one end of the fourth connection bar is electrically connected to the corresponding PCS switch, and the other end is electrically connected to the fourth bus.

[0012] Optionally, the multi-machine parallel bus cabinet further includes: a grid switch, which is arranged on one side of the multiple PCS switches, and the grid switch is correspondingly provided with four grid outgoing line buses, and the outgoing line buses are electrically connected to the bus bars one by one.

[0013] Optionally, the four grid outgoing busbars corresponding to the grid switches include a first grid outgoing busbar, a second grid outgoing busbar, a third grid outgoing busbar and a fourth grid outgoing busbar. The first busbar of each PCS switch is electrically connected to the first grid outgoing busbar, the second busbar of each PCS switch is electrically connected to the second grid outgoing busbar, the third busbar of each PCS switch is electrically connected to the third grid outgoing busbar, and the fourth busbar of each PCS switch is electrically connected to the fourth grid outgoing busbar.

[0014] Optionally, the grid switch is provided with four grid connection bars, including a first grid connection bar, a second grid connection bar, a third grid connection bar and a fourth grid connection bar, the first grid connection bar and the third grid connection bar are arranged along the third direction, the first grid connection bar and the fourth grid connection bar are arranged along the second direction, the second grid connection bar and the fourth grid connection bar are arranged along the third direction, and the second grid connection bar and the third grid connection bar are arranged along the second direction.

[0015] Optionally, four grid incoming line bars are correspondingly arranged for the grid switch, including a first grid incoming line bar, a second grid incoming line bar, a third grid incoming line bar and a fourth grid incoming line bar; one end of the first grid incoming line bar is electrically connected to the corresponding grid switch, and the other end is electrically connected to the first grid wiring bar; one end of the second grid incoming line bar is electrically connected to the corresponding grid switch, and the other end is electrically connected to the second grid wiring bar; one end of the third grid incoming line bar is electrically connected to the corresponding grid switch, and the other end is electrically connected to the third grid wiring bar; one end of the fourth grid incoming line bar is electrically connected to the corresponding grid switch, and the other end is electrically connected to the fourth grid wiring bar.

[0016] The four grid terminal blocks are arranged in pairs in the first and second directions, and the four grid incoming line blocks are staggered in the second direction, maximizing the use of space in two directions and facilitating the installation of the grid terminal blocks, thereby achieving a maximum of four-hole eight-wire wiring purpose.

[0017] Optionally, the multi-machine parallel combiner cabinet further includes:

[0018] A static transfer switch, the static transfer switch being electrically connected to the grid switch via a copper busbar;

[0019] A maintenance bypass switch, the maintenance bypass switch being electrically connected to the grid switch via a copper busbar;

[0020] A load switch is electrically connected to the grid switch via a copper busbar.

[0021] Optionally, the multi-machine parallel junction cabinet further comprises: a cabinet door, which is openably and closably provided on the cabinet body.

[0022] Optionally, the cabinet door is provided with a vent near the bottom of the cabinet body for communicating with the air outside the cabinet, and the inner wall is provided with an air outlet near the top for communicating with the air outside the cabinet. The air inlet, the accommodating cavity, and the air outlet are sequentially connected to form a heat dissipation channel.

[0023] Optionally, the multi-machine parallel junction cabinet further includes: a first PCS switch incoming line bar and a second PCS switch incoming line bar, the first PCS switch incoming line bar and the second PCS switch incoming line bar are staggered along the second direction, and each of the PCS switches is grounded through the first PCS switch incoming line bar and the second PCS switch incoming line bar.

[0024] Optionally, the first PCS switch incoming line bar is located on a side of the busbar away from the cabinet door.

[0025] The four busbars are arranged in pairs in the first and second directions, maximizing the use of space in the two directions so that each PCS switch can be grounded through the first PCS switch incoming line bus and the second PCS switch incoming line bus, achieving the convenience of wiring the PCS switch at the bottom.

[0026] The present invention also provides an integrated energy storage machine, in which the multi-machine parallel junction cabinet mentioned above is arranged.

[0027] The technical solution of the present invention arranges multiple PCS switches into at least two rows along the first direction, and arranges multiple bus bars corresponding to each PCS switch along the first direction or along the second direction, thereby achieving high space utilization and short copper bus bar paths, thereby achieving the purpose of convenient cable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of the front of the multi-stage parallel combiner cabinet of the utility model when the cabinet door is installed;

[0030] Figure 2 This is a schematic diagram of the structure of the side of the multi-machine parallel combiner cabinet of the utility model;

[0031] Figure 3 This is a schematic diagram of the overall structure of a multi-machine parallel combiner cabinet of the utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the multi-machine parallel junction box of the present invention when no cabinet door is installed;

[0033] Figure 5 This is a schematic diagram of the rear structure of the multi-machine parallel combiner cabinet of the present invention when it has no inner wall;

[0034] Figure 6 This is a schematic diagram of the copper busbar connection of the PCS switch in the multi-machine parallel combiner cabinet of the utility model;

[0035] Figure 7 This is a schematic diagram of the outgoing line connection of the grid switch in the multi-machine parallel combiner cabinet of the utility model;

[0036] Figure 8 This is a schematic diagram of the connection between the incoming line bar and the terminal bar of the grid switch in the multi-machine parallel junction box of the utility model.

[0037] Description of Figure Numbers:

[0038]

[0039]

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0044] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or solutions that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0045] In recent years, the global energy storage industry has experienced rapid growth, particularly in China, where energy storage technology has become a key pillar of the new energy industry. Energy storage technology provides a solid foundation for stabilizing the power grid and building new power systems. Industrial and commercial energy storage combiner cabinets are a companion product to energy storage systems. They primarily combine the AC power of multiple energy storage systems and incorporate an integrated energy meter (18) to calculate energy storage revenue. Currently, combiner cabinets present the following challenges:

[0046] (1) Incomplete functions: The common multi-machine parallel junction box 100 does not have the on-grid and off-grid switching function for the energy storage integrated device and off-grid loads. When the grid is out of power, the load cannot operate normally. The lack of functions leads to a poor user experience and affects the promotion of industrial and commercial energy storage integrated devices.

[0047] (2) Traditional on-grid and off-grid switching cabinets are mostly used indoors and have a single application scenario. Currently, most industrial and commercial application scenarios are outdoor, and there is an urgent need for an industrial and commercial energy storage integrated cabinet that can be used outdoors and has on-grid and off-grid switching functions.

[0048] (3) The space utilization rate of the cabinet 10 is low.

[0049] The present invention provides a multi-machine parallel junction box 100. Figures 1 to 6 , Figure 1 This is a structural diagram of the front of the multi-machine parallel combiner cabinet 100 of the present invention when the cabinet door 101 is installed; Figure 2 This is a side structural diagram of a multi-machine parallel combiner cabinet 100 according to the present invention; Figure 3 This is a schematic diagram of the overall structure of a multi-machine parallel combiner cabinet 100 of the present invention; Figure 4 This is a structural diagram of the front of the multi-machine parallel combiner cabinet 100 of the present invention when the cabinet door 101 is not installed; Figure 5 This is a structural diagram of the rear of the multi-machine parallel combiner cabinet 100 of the present invention without the inner wall 102; Figure 6 This is a schematic diagram of the copper busbar connection of the PCS switch in the multi-machine parallel combiner cabinet 100 of the present invention; Figure 7 This is a schematic diagram of the outgoing line connection of the grid switch 12 in the multi-machine parallel combiner cabinet 100 of the present invention; Figure 8 Schematic diagram of the connection between the incoming line bar and the terminal bar of the grid switch 12 in the multi-machine parallel combiner cabinet 100 of the present invention.

[0050] In the embodiment of the present utility model, Figures 1 to 8 As shown, the multi-stage parallel combiner cabinet proposed in the present invention is used for an energy storage integrated machine. The multi-stage parallel combiner cabinet includes: a cabinet body 10 , a cabinet door 101 , and an inner wall 102 .

[0051] A receiving cavity is formed in the cabinet body 10 , and a cabinet door 101 is provided to the cabinet body 10 in an openable and closable manner.

[0052] The cabinet 10 is equipped with multiple PCS (energy storage converter) switches 11, grid switches 12, switching power supplies 17, energy meters 18, static transfer switches 13, maintenance bypass switches 14, load switches 15, UPS (uninterruptible power supply) 19, EMS (energy management system) 21, grid CT (current transformer) 22, load CT (current transformer) 23, contactors 24, and switches 25.

[0053] Multiple PCS switches 11 are disposed within the accommodating cavity, with the PCS switches 11 arranged in at least two rows along the first direction. In this embodiment, eight PCS switches 11 are disposed within the multi-stage parallel combiner cabinet. The eight PCS switches 11 are arranged in five rows along the third direction and two rows along the first direction. In this embodiment, the first direction is the height direction, the second direction is the depth direction, and the third direction is the width direction.

[0054] Each of the PCS switches 11 is provided with at least two busbars, and the at least two busbars are arranged along the first direction or along the second direction, and each of the busbars is arranged between the inner wall 102 of the cabinet and the PCS switch, and the projection of the busbar and the PCS switch 11 in the second direction at least partially overlap.

[0055] Preferably, each of the PCS switches 11 is correspondingly provided with four busbars, including a first busbar 1111, a second busbar 1112, a third busbar 1113 and a fourth busbar 1114, the first busbar 1111 and the second busbar 1112 are arranged along the first direction, the first busbar 1111 and the third busbar 1113 are arranged along the second direction, the third busbar 1113 and the fourth busbar 1114 are arranged along the first direction, and the second busbar 1112 and the fourth busbar 1114 are arranged along the second direction.

[0056] The four buses are arranged in pairs in height and depth, maximizing the use of space in both directions.

[0057] Each of the PCS switches 11 is provided with at least one connecting bar, and the connecting bars correspond to the bus bars one by one. One end of the connecting bar is electrically connected to the PCS switch, and the other end is electrically connected to the corresponding bus bar.

[0058] Preferably, each of the PCS switches 11 is correspondingly provided with four connection bars, including a first connection bar 1121, a second connection bar 1122, a third connection bar 1123 and a fourth connection bar 1124; one end of the first connection bar 1121 is electrically connected to the corresponding PCS switch 11, and the other end is electrically connected to the first bus 1111; one end of the second connection bar 1122 is electrically connected to the corresponding PCS switch 11, and the other end is electrically connected to the second bus 1112; one end of the third connection bar 1123 is electrically connected to the corresponding PCS switch 11, and the other end is electrically connected to the third bus 1113; one end of the fourth connection bar 1124 is electrically connected to the corresponding PCS switch 11, and the other end is electrically connected to the fourth bus 1114.

[0059] The multi-machine parallel junction box 100 also includes: a first PCS switch incoming line bar 1131 and a second PCS switch incoming line bar 1132, the first PCS switch incoming line bar 1131 and the second PCS switch incoming line bar 1132 are extended along the second direction, and each of the PCS switches is grounded through the first PCS switch incoming line bar 1131 and the second PCS switch incoming line bar 1132.

[0060] Optionally, the first PCS switch incoming line bar 1131 is located on a side of the busbar away from the cabinet door 101 .

[0061] The four busbars are arranged in pairs in the first and second directions, maximizing the use of space in the two directions so that each of the PCS switches 11 can be grounded through the first PCS switch incoming line bus 1131 and the second PCS switch incoming line bus 1132, thereby achieving the convenience of wiring the PCS switch 11 at the bottom.

[0062] The grid switch 12 is provided at one side of the plurality of PCS switches 11 . The grid switch 12 is provided with four grid outgoing line bars corresponding to each other. The grid outgoing line bars are electrically connected to the bus bars in a one-to-one correspondence.

[0063] Preferably, the four grid outgoing line bars corresponding to the grid switch 12 include a first grid outgoing line bar 1211, a second grid outgoing line bar 1212, a third grid outgoing line bar 1213 and a fourth grid outgoing line bar 1214. The first bus bar 1111 of each of the PCS switches 11 is electrically connected to the first grid outgoing line bar 1211, the second bus bar 1112 of each of the PCS switches 11 is electrically connected to the second grid outgoing line bar 1212, the third bus bar 1113 of each of the PCS switches 11 is electrically connected to the third grid outgoing line bar 1213, and the fourth bus bar 1114 of each of the PCS switches 11 is electrically connected to the fourth grid outgoing line bar 1214.

[0064] Preferably, the grid switch 12 is correspondingly provided with four grid connection bars, including a first grid connection bar 1221, a second grid connection bar 1222, a third grid connection bar 1223 and a fourth grid connection bar 1224. The first grid connection bar 1221 and the third grid connection bar 1223 are arranged along the third direction, the first grid connection bar 1221 and the fourth grid connection bar 1224 are arranged along the second direction, the second grid connection bar 1222 and the fourth grid connection bar 1224 are arranged along the third direction, and the second grid connection bar 1222 and the third grid connection bar 1223 are arranged along the second direction.

[0065] Preferably, the grid switch 12 is provided with four grid incoming line bars, including a first grid incoming line bar 1231, a second grid incoming line bar 1232, a third grid incoming line bar 1233 and a fourth grid incoming line bar 1234; one end of the first grid incoming line bar 1231 is electrically connected to the corresponding grid switch 12, and the other end is electrically connected to the first grid connection bar 1221; one end of the second grid incoming line bar 1232 is electrically connected to the corresponding grid switch 12, and the other end is electrically connected to the second grid connection bar 1222; one end of the third grid incoming line bar 1233 is electrically connected to the corresponding grid switch 12, and the other end is electrically connected to the third grid connection bar 1223; one end of the fourth grid incoming line bar 1234 is electrically connected to the corresponding grid switch 12, and the other end is electrically connected to the fourth grid connection bar 1224.

[0066] The four grid terminal blocks are staggered in height and depth, maximizing the use of space in two directions and facilitating the installation of the grid terminal blocks, thereby achieving a maximum of four-hole eight-wire wiring purpose.

[0067] The load switch 15 is located on one side of the PCS switch 11 and is electrically connected to the grid switch 12 via a copper busbar. The maintenance bypass switch 14 is located above the load switch 15 and is electrically connected to the grid switch 12 via a copper busbar. The static transfer switch 13 is located above the maintenance bypass switch 14 and is electrically connected to the grid switch 12 via a copper busbar. The UPS 19 is located on one side of the static transfer switch 13, the energy meter 18 is located on the side of the UPS 19 away from the static transfer switch 13, and the switching power supply 17 is located above the UPS 19.

[0068] EMS21 is located on the inside of the cabinet door 101; the switch 25 is located on the side of the PCS switch away from the cabinet door 101, that is, the switch 25 is located between the PCS switch and the inner wall 102; the contactor 24 is located above the switch 25, the load CT23 is located above the contactor 24, and the grid CT22 is located on the side of the load CT23.

[0069] The multi-machine parallel combiner cabinet 100 of the present invention integrates the static transfer switch 13 into the cabinet, so that the combiner cabinet has the function of switching between on-grid and off-grid. When the power grid is cut off, the load can still operate normally, thereby improving the user experience.

[0070] The multi-machine parallel junction box 100 of the present invention integrates eight PCS switches and a static transfer switch 13 into the box. Although it realizes the eight-machine parallel function and the on-grid and off-grid switching function, the PCS switches and the static transfer switch 13 have high heat exchange requirements.

[0071] The cabinet door 101 is provided with a vent 1011 near the bottom of the cabinet body 10, which is connected to the air outside the cabinet body 10. The inner wall 102 is provided with an air outlet 1012 near the top, which is connected to the air outside the cabinet body 10. The air inlet, the accommodating cavity and the air outlet 1012 are connected to form a heat dissipation channel. In this embodiment, the fan 16 can be provided at the air outlet 1012. When the cold air enters the interior of the cabinet from the air inlet, under the suction action of the fan 16, the cold air can pass through the various components in the cabinet in turn and be discharged from the cabinet through the air outlet 1012. Therefore, when the cold air circulates in the cabinet body 10, it can pass through as many heating devices as possible from bottom to top, which is conducive to improving the heat dissipation effect inside the cabinet body 10, preventing the equipment in the cabinet body 10 from overheating and malfunctioning or burning, and solving the problem of high heat exchange requirements of the junction cabinet.

[0072] In this embodiment, the vent 1011 is provided with ventilation louvers and 45PPI polyurethane filter cotton. The ventilation louvers are waterproof louvers, and the 45PPI polyurethane filter cotton has a dustproof function to meet the needs of outdoor use.

[0073] The technical solution of this utility model has the following technical effects:

[0074] (1) The multi-machine parallel junction box 100 of the present invention integrates the static transfer switch 13 into the cabinet, so that the junction box has the function of switching between on-grid and off-grid. When the power grid is cut off, the load can still operate normally, improving the user experience and promoting the promotion of industrial and commercial energy storage integrated machines;

[0075] (2) The vents 1011 of the multi-machine parallel junction box 100 of the present invention are provided with ventilation louvers and 45PPI polyurethane filter cotton. The ventilation louvers are waterproof louvers, and the 45PPI polyurethane filter cotton has a dustproof function, which meets the needs of outdoor use;

[0076] (3) By arranging eight PCS switches in five rows along the first direction and two rows along the third direction, and arranging the four buses corresponding to each PCS switch in pairs in the first and second directions, the space utilization rate is high, the copper bus path is short, and the purpose of convenient cable connection is achieved.

[0077] The present invention also provides an integrated energy storage machine, in which the multi-machine parallel junction cabinet mentioned above is arranged.

[0078] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A multi-machine parallel combiner cabinet, characterized in that: include: A cabinet body, wherein a receiving cavity is formed in the cabinet body; A plurality of PCS switches are disposed in the accommodating cavity, wherein the plurality of PCS switches are arranged in at least two rows along a first direction; a plurality of busbars, at least two busbars corresponding to each PCS switch, the busbars being arranged along a first direction or a second direction, and the at least two busbars being arranged between an inner wall of the cabinet and the corresponding PCS switch, and projections of the at least two busbars and the corresponding PCS switch in the second direction at least partially overlapping; A plurality of connection bars, at least two connection bars corresponding to each PCS switch, the connection bars corresponding to the bus bars one-to-one, one end of the connection bar being electrically connected to the corresponding PCS switch, and the other end being electrically connected to the corresponding bus bar.

2. The multi-machine parallel combiner cabinet according to claim 1, characterized in that: Each of the PCS switches is correspondingly provided with four bus bars, including a first bus bar, a second bus bar, a third bus bar and a fourth bus bar. The first bus bar and the second bus bar are arranged along the first direction, the first bus bar and the third bus bar are arranged along the second direction, and the third bus bar and the fourth bus bar are arranged along the first direction.

3. The multi-machine parallel combiner cabinet according to claim 2, characterized in that: Each of the PCS switches is correspondingly provided with four connecting bars, including a first connecting bar, a second connecting bar, a third connecting bar, and a fourth connecting bar. The first connecting bar is electrically connected to the first bus bar, the second connecting bar is electrically connected to the second bus bar, the third connecting bar is electrically connected to the third bus bar, and the fourth connecting bar is electrically connected to the fourth bus bar.

4. The multi-machine parallel combiner cabinet according to claim 3, characterized in that: The multi-machine parallel busbar cabinet further includes: a grid switch, which is arranged on one side of the multiple PCS switches. The grid switch is correspondingly provided with four grid outgoing line buses, and the grid outgoing line buses are electrically connected to the busbars in a one-to-one correspondence.

5. The multi-machine parallel combiner cabinet according to claim 4, characterized in that: The four grid outgoing busbars corresponding to the grid switches include a first grid outgoing busbar, a second grid outgoing busbar, a third grid outgoing busbar, and a fourth grid outgoing busbar. The first busbar of each of the PCS switches is electrically connected to the first grid outgoing busbar, the second busbar of each of the PCS switches is electrically connected to the second grid outgoing busbar, the third busbar of each of the PCS switches is electrically connected to the third grid outgoing busbar, and the fourth busbar of each of the PCS switches is electrically connected to the fourth grid outgoing busbar.

6. The multi-machine parallel combiner cabinet according to claim 5, characterized in that: The multi-machine parallel combiner cabinet further includes: A static transfer switch, the static transfer switch being electrically connected to the grid switch via a copper busbar; A maintenance bypass switch, the maintenance bypass switch being electrically connected to the grid switch via a copper busbar; A load switch is electrically connected to the grid switch via a copper busbar.

7. The multi-machine parallel combiner cabinet according to claim 1, characterized in that: The multi-machine parallel junction cabinet further includes a cabinet door, which is openably and closably provided on the cabinet body.

8. The multi-machine parallel combiner cabinet according to claim 7, characterized in that: The cabinet door is provided with a ventilating port communicating with the air outside the cabinet at a position close to the bottom of the cabinet body, and the inner wall is provided with an air outlet communicating with the air outside the cabinet near the top.

9. The multi-machine parallel combiner cabinet according to claim 1, characterized in that: The multi-machine parallel junction box also includes: a first PCS switch incoming line bar and a second PCS switch incoming line bar, the first PCS switch incoming line bar and the second PCS switch incoming line bar are staggered along the second direction, and each of the PCS switches is grounded through the first PCS switch incoming line bar and the second PCS switch incoming line bar.

10. An integrated energy storage device, characterized in that: The energy storage integrated machine is provided with a multi-machine parallel junction cabinet as described in any one of claims 1 to 9.

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