Energy storage confluence cabinet

Abstract

The utility model discloses an energy storage confluence cabinet, and relates to the technical field of photovoltaic power generation, a main circuit breaker, a PCS busbar and a BAT busbar are installed in a cabinet body, the PCS busbar, the main circuit breaker and the BAT busbar are sequentially arranged in the vertical direction, and the height position where the main circuit breaker is located is located between the PCS busbar and the BAT busbar; the PCS module is electrically connected to the main circuit breaker through the PCS bus bar, the BAT module is electrically connected to the main circuit breaker through the BAT bus bar, the PCS bus bar and the BAT bus bar are mutually distributed up and down and are mutually staggered and arranged at intervals in the vertical height direction to form an enough safe electrical gap, and the PCS bus bar reaches the BAT bus bar through the main circuit breaker for shunting; the space in the depth direction of the cabinet body can be released to a large extent, the vertical distribution structure is adopted, the depth of the cabinet body is much smaller than the size of a conventional structure, and therefore the occupied area of the cabinet body can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and more specifically to an energy storage combiner cabinet. Background Technology

[0002] An energy storage cabinet is a device that can store electrical energy. It typically consists of battery packs, inverters, control chips, and other components. It can store electrical energy and release it for power supply when needed, usually to provide backup power and stabilize grid voltage. Energy storage cabinets can smooth out fluctuations caused by non-connected renewable energy sources connecting to the grid, maintain grid stability, suppress load fluctuations, and play a role in frequency and voltage regulation, thereby improving the power factor.

[0003] As the market share of large-capacity energy storage systems gradually increases, the internal space of shipping containers is becoming increasingly compact. Current technology involves the power conversion system (PCS) at the bottom converging through the main circuit breaker at the top and then returning to the battery (BAT) at the bottom for branching. The positive and negative terminals of the PCS and BAT terminals need to be short-circuited at the main circuit breaker. This not only affects the dimensions in the height direction but also in the depth direction.

[0004] Combination Figure 1 As shown, the current combiner cabinets on the market all use bottom-in and bottom-out wiring, which takes up a lot of space. The larger the space occupied by the combiner cabinet, the more it will limit the increase in the number of batteries, resulting in the inability to increase the system capacity.

[0005] For those skilled in the art, reducing the space occupied by combiner cabinets is a technical problem that needs to be solved. Utility Model Content

[0006] The core of this utility model is to provide an energy storage combiner cabinet in which the PCS busbar, main circuit breaker, and BAT busbar are arranged vertically in sequence, which can reduce the depth space and the floor area of ​​the cabinet. The specific solution is as follows:

[0007] An energy storage combiner cabinet includes a cabinet body and a main circuit breaker, a PCS busbar, and a BAT busbar installed inside the cabinet body;

[0008] In the vertical direction, the PCS bus, the main circuit breaker, and the BAT bus are arranged in sequence, with the main circuit breaker located between the PCS bus and the BAT bus;

[0009] The PCS module is electrically connected to the main circuit breaker via the PCS bus, and the BAT module is electrically connected to the main circuit breaker via the BAT bus.

[0010] Optionally, the PCS bus is located below the main circuit breaker, and the BAT bus is located above the main circuit breaker.

[0011] Optionally, a main circuit fuse is provided between the BAT bus and the main circuit breaker.

[0012] Optionally, the main circuit fuse is fixed to the side wall of the cabinet by copper busbar fixing brackets and copper busbar fasteners;

[0013] The copper busbar fasteners are fixed to the side wall of the cabinet.

[0014] The busbar fixing bracket includes a horizontal support plate for supporting and electrically connecting the main circuit fuse; the two adjacent edges of the support plate are bent downward to form a first bending plate and a second bending plate; the first bending plate is fixed to the copper busbar fastener by an insulating post, and the second bending plate is electrically connected to the main circuit breaker below.

[0015] Optionally, the PCS busbar is a vertical plate and is connected to the cabinet via insulating posts;

[0016] Two PCS busbars are provided, and a spacer is provided between the two PCS busbars.

[0017] Optionally, the BAT busbar has an L-shaped structure, with the first side panel of the L-shape fixed to the rear side panel of the cabinet via an insulating post, and the second side panel of the L-shape fixed to the side wall of the cabinet via an insulating post.

[0018] The lower edge of the first side plate of the BAT busbar is bent to form a connecting strip; a spacer plate is provided between the two BAT busbars.

[0019] Optionally, two BAT busbars are provided, which are fixed inside the cabinet in a left-right distribution.

[0020] Optionally, the main circuit breaker is fixed to the rear panel of the cabinet by a circuit breaker mounting plate;

[0021] The circuit breaker mounting plate has bending plates on its four edges, and the bending plates contact and fix the rear side panel of the cabinet.

[0022] Optionally, two lightning protection fuses are provided on the side wall of the cabinet, with the two lightning protection fuses located on opposite side walls.

[0023] Optionally, the PCS module is connected to the PCS busbar from the bottom plate of the cabinet, and the BAT module is connected to the BAT busbar from the top plate of the cabinet.

[0024] This utility model provides an energy storage combiner cabinet. The cabinet interior is equipped with a main circuit breaker, a PCS busbar, and a BAT busbar, arranged vertically in sequence. The main circuit breaker is positioned between the PCS and BAT busbars. PCS modules are electrically connected to the main circuit breaker via the PCS busbar, and BAT modules are also electrically connected via the BAT busbar. The PCS and BAT busbars are vertically distributed, staggered to create sufficient safety electrical clearance. Current is diverted from the PCS busbars to the BAT busbars via the main circuit breaker. This design significantly reduces the cabinet's depth space due to the vertical distribution structure, resulting in a much smaller cabinet depth than conventional designs and thus a smaller floor area. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the circuit connection principle in the prior art;

[0027] Figure 2 This is a schematic diagram of the circuit connection principle of this utility model;

[0028] Figure 3 This is an isometric view of the overall appearance of the energy storage combiner cabinet of this utility model from an oblique angle.

[0029] Figure 4 This is a lower-angle isometric view of the overall appearance of the energy storage combiner cabinet of this utility model;

[0030] Figure 5 An isometric view of the energy storage combiner cabinet of this utility model with the front panel removed from the upper oblique view;

[0031] Figure 6 Axonometric view of the lower oblique section of the front panel of the energy storage combiner cabinet of this utility model, excluding the front panel;

[0032] Figure 7 A front view of the energy storage combiner cabinet of this utility model without the front panel;

[0033] Figure 8 A front-side oblique lower isometric view of the PCS busbar, main circuit breaker, main circuit fuse, and BAT busbar.

[0034] Figure 9A rear-side oblique-up isometric view of the PCS busbar, main circuit breaker, main circuit fuse, and BAT busbar in coordination.

[0035] Figure 10 , Figure 11 These are two isometric views of the BAT bus from different perspectives;

[0036] Figure 12 , Figure 13 Two isometric views from different perspectives are shown for the copper busbar fixing bracket and the copper busbar fastener assembly, respectively.

[0037] Figure 14 , Figure 15 These are isometric views of the PCS bus from two different perspectives.

[0038] The image includes:

[0039] Cabinet 1, Main Circuit Breaker 2, Circuit Breaker Mounting Plate 21, Slot 22, PCS Busbar 3, BAT Busbar 4, First Side Plate 41, Second Side Plate 42, Connecting Busbar 43, Main Circuit Fuse 5, Copper Busbar Fixing Bracket 51, Support Plate 511, First Bending Plate 512, Second Bending Plate 513, Copper Busbar Fastener 52, Lightning Protection Fuse 6, Spacing Plate 7, Insulating Post 8, Connecting Terminal 9. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of this utility model, the energy storage combiner cabinet of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] This utility model provides an energy storage combiner cabinet, combined with Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the energy storage combiner cabinet includes a cabinet 1, a main circuit breaker 2, a PCS busbar 3, and a BAT busbar 4, among other components. The main circuit breaker 2, PCS busbar 3, and BAT busbar 4 are installed inside the cabinet 1. The main circuit breaker 2 is also known as the DC combiner main circuit breaker.

[0042] The PCS busbar 3, main circuit breaker 2, and BAT busbar 4 are arranged vertically in sequence, with the main circuit breaker 2 located between the PCS busbar 3 and the BAT busbar 4. That is, there are two possible configurations: one where the PCS busbar 3 is below the main circuit breaker 2 and the BAT busbar 4 is above the main circuit breaker 2, and the other where the PCS busbar 3 is above the main circuit breaker 2 and the BAT busbar 4 is below the main circuit breaker 2.

[0043] The PCS module is electrically connected to the main circuit breaker 2 via PCS bus 3, and the BAT module is electrically connected to the main circuit breaker 2 via BAT bus 4. The main circuit breaker 2 is the main switch used to connect and disconnect the power supply. In the event of a short circuit, grounding, or other fault in the main circuit, the main circuit breaker can quickly disconnect, providing protection. The main circuit breaker 2 is an air circuit breaker, consisting of an arc-extinguishing chamber, a disconnecting switch, a control and operating mechanism, and a compressed air supply system.

[0044] PCS bus 3 is used to make conductive connections with PCS modules, and multiple PCS modules are conductively connected to PCS bus 3. BAT bus 4 is used to make conductive connections with BAT modules, and multiple BAT modules are conductively connected to BAT bus 4. A main circuit breaker 2 is installed between PCS bus 3 and BAT bus 4 to control the connection and disconnection between them.

[0045] This utility model changes the positions of PCS busbar 3 and BAT busbar 4. The current flows from PCS busbar 3 through the main circuit breaker 2 and then to BAT busbar 4 for branching. Compared with the traditional bottom-in and bottom-out wiring method, it can free up more space in the depth direction of cabinet 1, thereby reducing the floor area of ​​cabinet 1.

[0046] Based on the above scheme, this utility model provides a specific structural scheme in which the PCS bus 3 is disposed below the main circuit breaker 2, and the BAT bus 4 is disposed above the main circuit breaker 2, with the main circuit breaker 2 located between the PCS bus 3 and the BAT bus 4. Depending on the configuration of the PCS and BAT modules, the relative positions of the PCS bus 3 and the BAT bus 4 can be changed; that is, the PCS bus 3 can be disposed above the main circuit breaker 2, and the BAT bus 4 can be disposed below the main circuit breaker 2. This configuration should also be included within the protection scope of this utility model.

[0047] Combination Figure 2 , Figure 6 , Figure 8 As shown, a main circuit fuse 5 is installed between the BAT bus 4 and the main circuit breaker 2. The main circuit fuse 5 is located between the positive terminal of the BAT bus 4 and the main circuit breaker 2. A fuse is an electrical device that breaks the circuit by melting its fusible element when the current exceeds a specified value, acting as a protector against short circuits and overcurrents.

[0048] The main circuit fuse 5 is fixed to the side wall of the cabinet 1 by copper busbar fixing bracket 51 and copper busbar fastener 52; combined with Figure 8 , Figure 9 , Figure 12 , Figure 13 As shown, the copper busbar fastener 52 is fixed to the side wall of the cabinet 1. Figure 6The copper busbar fastener 52 is fixed to the left side wall of the cabinet 1. An insulating post 8 is installed between the copper busbar fixing bracket 51 and the copper busbar fastener 52, forming an insulating gap between them. The copper busbar fastener 52 has a U-shaped groove structure, and ear plates are provided at both ends of the copper busbar fastener 52 for fixing to the side wall of the cabinet 1 with bolts.

[0049] It should be noted that mounting plates are installed on the left and right side walls and the rear panel inside the cabinet 1 for the installation of components. The installation referred to in this article is on the mounting plates of the cabinet 1.

[0050] Combination Figure 12 , Figure 13 As shown, the busbar fixing bracket 51 includes a horizontal support plate 511, which supports and electrically connects to the main circuit fuse 5. Two adjacent edges of the support plate 511 are bent downwards to form a first bent plate 512 and a second bent plate 513, which are perpendicular to the support plate 511. The first bent plate 512 is fixed to the copper busbar fastener 52 by an insulating post 8, and the second bent plate 513 is electrically connected to the main circuit breaker 2 below.

[0051] PCS busbar 3 is a vertical plate-shaped structure, connected to cabinet 1 via insulating posts 8, and combined with... Figure 14 , Figure 15 As shown, an insulating post 8 is installed on the rear side of the PCS busbar 3, so that the PCS busbar 3 is installed on the rear side of the cabinet 1, thereby fixing the PCS busbar 3 and forming an insulating gap.

[0052] Two PCS busbars 3 are provided, serving as the positive and negative terminals respectively, connecting to the positive and negative terminals of the PCS module. A spacer plate 7 is provided between the two PCS busbars 3, with the spacer plate 7 being vertically arranged to provide insulation between the two PCS busbars 3. In this application, one PCS busbar 3 is provided for each of the positive and negative terminals. In addition, two or more PCS busbars 3 can be provided for connection to the positive terminal, forming an insulation gap through the spacer plate 7; two or more PCS busbars 3 can be provided for connection to the negative terminal, forming an insulation gap through the spacer plate 7.

[0053] Combination Figure 8 As shown, several parallel slots 22 are provided below the main circuit breaker 2. The partition plate 7 can be inserted into the slots 22 to facilitate the installation and removal of the partition plate 7. The partition plate 7 is located between two PCS busbars 3.

[0054] Combination Figure 10 , Figure 11As shown, the BAT busbar 4 has an L-shaped structure, comprising two mutually perpendicular plates, which are vertical. The first side plate 41 is parallel to the rear side plate of the cabinet 1, and the second side plate 42 is parallel to the left and right side walls of the cabinet 1. The L-shaped first side plate 41 is fixed to the rear side plate of the cabinet 1 by insulating posts 8, and the L-shaped second side plate 42 is fixed to the side wall of the cabinet 1 by insulating posts 8. The insulating posts 8 are used to fix the plates, forming an insulating gap between the BAT busbar 4 and the cabinet 1.

[0055] This utility model provides two BAT busbars 4, serving as the positive and negative terminals respectively. One BAT busbar 4 is connected to the positive terminal of the BAT module, and the other BAT busbar 4 is connected to the negative terminal of the BAT module. A connecting strip 43 is formed by bending the lower edge of the first side plate 41 of one of the BAT busbars 4, in conjunction with... Figure 8 , Figure 9 As shown, the BAT busbar 4 for connecting to the positive terminal is connected to the main circuit breaker 2 via a connecting busbar 43. A spacer 7 is provided between two BAT busbars 4 to form an insulating space. Furthermore, two or more BAT busbars 4 for connecting to the positive terminal can be provided, forming an insulating space through the spacer 7; two or more BAT busbars 4 for connecting to the negative terminal can also be provided, forming an insulating space through the spacer 7.

[0056] Combination Figure 9 As shown, several parallel slots 22 are provided above the main circuit breaker 2. The partition plate 7 can be inserted into the slots 22 to facilitate the installation and removal of the partition plate 7. The partition plate 7 is located between the two BAT busbars 4.

[0057] The attached drawings of this utility model show two BAT busbars 4, one serving as the positive terminal and the other as the negative terminal. The two BAT busbars 4 are arranged side-by-side and fixed inside the cabinet 1. Combined with... Figure 8 , Figure 9 As shown, a main circuit fuse 5 is installed between the positive BAT bus 4 and the main circuit breaker 2; the negative BAT bus 4 and the main circuit breaker 2 are connected by two conductive plates as mutual backups; the two conductive plates can be electrically connected to each other or set up independently.

[0058] Combination Figure 8 , Figure 9 As shown, the main circuit breaker 2 is fixed to the rear panel of the cabinet 1 by the circuit breaker mounting plate 21. The circuit breaker mounting plate 21 is a vertical plate structure. Bending plates are set on the four edges of the circuit breaker mounting plate 21. The bending plates contact the rear panel of the cabinet 1 and are fixed by bolts to achieve fixed support for the main circuit breaker 2.

[0059] Combination Figure 6 , Figure 7As shown, this utility model provides two lightning protection fuses 6 on the two side walls of the cabinet 1. The two lightning protection fuses 6 are located on the two opposite side walls, and one lightning protection fuse 6 is provided on each of the left and right side walls to prevent damage to the line caused by power frequency follow current due to lightning strikes.

[0060] Combination Figure 3 , Figure 4 As shown, the PCS module is connected to the PCS busbar 3 from the bottom plate of cabinet 1, and the BAT module is connected to the BAT busbar 4 from the top plate of cabinet 1. The PCS busbar 3 is used to connect multiple connection terminals 9, each of which is connected to an electrode of the PCS module via a wiring harness. The BAT busbar 4 is also used to connect multiple connection terminals 9, each of which is connected to an electrode of the PCS module via a wiring harness.

[0061] The cabinet of this utility model is equipped with copper busbars, main circuit fuses, fans, surge protectors, surge protection fuses, lighting, terminals, temperature controllers and other devices. The BAT busbar and PCS busbar are located on the upper and lower sides of the main circuit breaker 2 respectively. The cabinet depth is much smaller than the conventional structural dimensions, which greatly reduces the space occupied by the cabinet in the container.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy storage combiner cabinet, characterized in that, Includes a cabinet (1) and a main circuit breaker (2), a PCS busbar (3), and a BAT busbar (4) installed inside the cabinet (1); In the vertical direction, the PCS bus (3), the main circuit breaker (2), and the BAT bus (4) are arranged in sequence, with the main circuit breaker (2) located between the PCS bus (3) and the BAT bus (4); The PCS module is electrically connected to the main circuit breaker (2) via the PCS bus (3), and the BAT module is electrically connected to the main circuit breaker (2) via the BAT bus (4).

2. The energy storage combiner cabinet according to claim 1, characterized in that, The PCS bus (3) is located below the main circuit breaker (2), and the BAT bus (4) is located above the main circuit breaker (2).

3. The energy storage combiner cabinet according to claim 2, characterized in that, A main circuit fuse (5) is provided between the BAT bus (4) and the main circuit breaker (2).

4. The energy storage combiner cabinet according to claim 3, characterized in that, The main circuit fuse (5) is fixed to the side wall of the cabinet (1) by a copper busbar fixing bracket (51) and a copper busbar fastener (52); The copper busbar fastener (52) is fixed to the side wall of the cabinet (1); The busbar fixing bracket (51) includes a horizontal support plate (511), which is used to support and electrically connect the main circuit fuse (5); the two adjacent edges of the support plate (511) are bent downward to form a first bending plate (512) and a second bending plate (513); the first bending plate (512) is fixed to the copper busbar fastener (52) by an insulating post (8), and the second bending plate (513) is electrically connected to the main circuit breaker (2) below.

5. The energy storage combiner cabinet according to claim 1, characterized in that, The PCS busbar (3) is a vertical plate and is connected to the cabinet (1) through an insulating column (8); Two PCS busbars (3) are provided, and a spacer plate (7) is provided between the two PCS busbars (3).

6. The energy storage combiner cabinet according to claim 1, characterized in that, The BAT busbar (4) has an L-shaped structure. The first side panel (41) of the L-shape is fixed to the rear side panel of the cabinet (1) by an insulating post (8), and the second side panel (42) of the L-shape is fixed to the side wall of the cabinet (1) by an insulating post (8). The lower edge of the first side plate (41) of the BAT busbar (4) is bent to form a connecting plate (43); a spacer plate (7) is provided between the two BAT busbars (4).

7. The energy storage combiner cabinet according to claim 6, characterized in that, Two BAT busbars (4) are provided, which are fixed inside the cabinet (1) in a left-right distribution.

8. The energy storage combiner cabinet according to claim 1, characterized in that, The main circuit breaker (2) is fixed to the rear panel of the cabinet (1) by means of the circuit breaker mounting plate (21); The circuit breaker mounting plate (21) has four bend plates on its four edges, and the bend plates contact and fix the rear side plate of the cabinet (1).

9. The energy storage combiner cabinet according to claim 1, characterized in that, Two lightning protection fuses (6) are installed on the side wall of the cabinet (1), and the two lightning protection fuses (6) are located on two opposite side walls.

10. The energy storage combiner cabinet according to claim 1, characterized in that, The PCS module is connected to the PCS busbar (3) from the bottom plate of the cabinet (1), and the BAT module is connected to the BAT busbar (4) from the top plate of the cabinet (1).

Images