A centralized PCS cabinet

Abstract

The utility model discloses a centralized PCS cabinet belongs to the field of electric power equipment, and solves the high water inlet risk of existing cabinet convergence area, high cable cost and wiring difficulty. It contains frame, convergence area, PCS area and base, and the convergence area (has circuit breaker, sealing structure, bottom opening) on the frame, and the PCS area (has corresponding PCS unit module, front sealing plate, rear sealing plate) below, and the base opening is used for direct current cable access. It can reduce the water inlet risk, save cable cost, reduce wiring difficulty, guarantee the stable equipment, convenient maintenance, and is suitable for energy storage power station, data center and the like.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically a centralized PCS cabinet. Background Technology

[0002] The existing centralized PCS cabinet includes a cabinet, a PCS area containing multiple PCS unit modules, a busbar area containing multiple circuit breakers, circuit breaker busbars, and other electrical components. The PCS modules are equipped with DC and AC interfaces. The DC interface connects to the external battery pack for DC power, and the AC interface connects to the output interface of each branch circuit breaker. The circuit breaker input interface connects to the busbar to enter the external transformer compartment.

[0003] The existing centralized PCS cabinet structure uses a layout where the upper part is the PCS area and the lower part is the combiner area. The interfaces of the PCS unit modules are mostly located at the bottom of the modules. AC cables need to pass through the top of the combiner area to enter the combiner area and connect to the circuit breaker, or the cables need to go around the top of the combiner area to the side and enter the combiner area. DC cables need to enter the combiner area from the bottom and then pass through the top of the combiner area to connect to the PCS AC interface, or they need to go out from the side of the combiner area and go around to the PCS AC interface.

[0004] The aforementioned prior art has the following drawbacks:

[0005] This increases the risk of water ingress into the runoff area, requiring additional sealing work at the inlet and outlet during on-site construction.

[0006] The longer cable length significantly increases cable costs.

[0007] DC cables need to pass through the busbar area to connect to the PCS module. Most DC cables are armored cables, which are relatively stiff and heavy, making on-site wiring work difficult.

[0008] Therefore, a new type of centralized PCS cabinet is needed to solve the above problems. Utility Model Content

[0009] The purpose of this utility model is to overcome the defects in the existing technology and provide a centralized PCS cabinet with a reasonable structure, which can reduce the risk of water ingress, save cable costs and facilitate on-site wiring.

[0010] To achieve the above objectives, the present invention employs the following technical means:

[0011] A centralized PCS cabinet includes a frame, a busbar area, a PCS area, and a base; the internal space of the frame is divided into upper and lower parts, the upper part being the busbar area and the lower part being the PCS area, and the base is fixedly connected to the bottom of the frame.

[0012] At least one circuit breaker is fixedly connected in the busbar area. The input interface of the circuit breaker is connected to the external transformer compartment through a copper busbar. The front side of the busbar area is provided with an inner sealing plate fixed to the frame and a front door hinged to the frame. The rear side of the busbar area is provided with a rear door panel fixed to the frame. The bottom of the busbar area is provided with a bottom opening that communicates with the PCS area.

[0013] The front and rear sealing plates are fixedly connected to the front and rear sides of the PCS area, respectively. The PCS area is fixedly connected to PCS unit modules corresponding to the number of circuit breakers. The upper part of the PCS unit module is connected to the PCS AC interface. The PCS AC interface is connected to the output interface of the corresponding circuit breaker through the bottom opening of the combiner area via an AC cable. The lower part of the PCS unit module is connected to the PCS DC interface.

[0014] The base has an opening that communicates with the PCS area, and an external DC cable passes through the base opening to connect to the PCS DC interface.

[0015] Preferably, ventilation louvers are inlaid and connected to the right side of the confluence area.

[0016] Preferably, the ventilation louvers are louvers with an IP waterproof and dustproof rating.

[0017] Preferably, the left side of the busbar area has a copper busbar opening and a cable opening, with the copper busbar passing through the copper busbar opening and the external cable passing through the cable opening.

[0018] Preferably, the rear door panel is fixed to the frame with screws, and the joint between the rear door panel and the frame is sealed with expanding foam to form a sealed structure around the junction area.

[0019] Preferably, the circuit breaker is a molded case circuit breaker.

[0020] Preferably, the rear cover plate has multiple sets of air outlets for ventilation of the PCS unit module, and the front cover plate has multiple sets of air inlets for ventilation of the PCS unit module.

[0021] This utility model has the following beneficial effects:

[0022] 1. Significantly reduces the risk of water ingress into the runoff area and improves waterproofing reliability.

[0023] Water ingress risk control: The layout adopts "upper busbar area + lower PCS area". The AC cable is connected through the bottom opening of the busbar area. Compared with the existing technology of "busbar area upper / side cable entry", the hidden dangers of top water ingress and side water seepage are completely avoided, and the risk of water ingress in the busbar area is significantly reduced.

[0024] Active drainage function: The bottom opening of the confluence area also serves as a drainage function. Even in the event of short-term water accumulation, the water can be naturally drained into the foundation below the PCS area through the opening without the need for additional drainage components.

[0025] Fully sealed protection: The junction between the rear door panel and the frame in the manifold area is sealed with expanding foam, forming a four-sided sealed structure with the front door and inner sealing panel. Only functional openings are retained, and none of the functional openings need to be sealed on site, which reduces construction steps and avoids waterproofing risks caused by sealing failure.

[0026] 2. Save on cable costs and reduce construction costs.

[0027] Shorter cable length: The PCS AC interface is located at the top of the PCS unit module, and the circuit breaker is located at the bottom of the busbar area. The distance between the two is greatly shortened, and the length of a single AC cable is significantly reduced, effectively reducing the procurement cost of AC cables.

[0028] Reduced cable loss: DC cables do not need to pass through the busbar area and can be directly connected to the PCS DC interface from the base opening, avoiding the extra length loss caused by "busbar winding" of armored cables, and further saving cable costs.

[0029] 3. Reduce on-site wiring difficulty and improve construction efficiency.

[0030] DC wiring optimization: DC cables can pass directly through the base opening from the foundation and vertically connect to the PCS DC interface, eliminating the need for the complicated operation of "passing in from the bottom of the combiner area → passing out from the top → going around to the PCS interface", which greatly shortens the wiring time. A single person can complete the DC wiring of a single module, reducing the number of construction personnel required.

[0031] Convenient AC wiring: AC cables pass directly from the top of the PCS area into the bottom opening of the busbar area, allowing for close connection with the circuit breaker output interface. This eliminates the need for climbing or winding, expands the wiring operation space, effectively avoids wiring errors caused by limited operating space, and improves the wiring qualification rate.

[0032] 4. Ensure stable equipment operation and extend service life.

[0033] High-efficiency heat dissipation: IP54-rated ventilation louvers are embedded on the right side of the busbar area, forming an air convection channel with the bottom opening, which effectively reduces the internal temperature of the busbar area and prevents the circuit breaker from tripping due to high temperature; the cover plate of the PCS area has multiple ventilation openings, which, together with the heat dissipation of the PCS unit module itself, maintain a suitable operating temperature of the PCS area and improve the stability of module operation.

[0034] Enhanced protection: The sealing plate protects the PCS area cables from UV radiation, slowing down cable aging; the ventilation louvers have an IP54 waterproof and dustproof rating, preventing dust and rainwater from entering the busbar area, reducing dust accumulation and moisture-induced faults at circuit breaker contacts, and lowering the equipment failure rate.

[0035] 5. Improve maintenance convenience and reduce subsequent operation and maintenance costs.

[0036] Convenient maintenance of the busbar area: The front door of the busbar area is hinged, allowing direct operation of the circuit breaker and busbars without disassembling the side panels; the rear door panel is fixed with screws, and after disassembly, the rear components of the busbar area can be inspected, significantly shortening maintenance time;

[0037] Highly efficient troubleshooting: Each PCS unit module corresponds one-to-one with the circuit breaker, and the AC cables are directly connected without any winding. When a fault occurs, the correspondence between "PCS module-cable-circuit breaker" can be quickly located, which greatly speeds up the troubleshooting process and reduces losses caused by downtime due to faults. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of this utility model;

[0039] Figure 2 This is an exploded view of the structure of this utility model;

[0040] Figure 3 This is a schematic diagram of the frame structure of this utility model. Figure 1 ;

[0041] Figure 4 This is a schematic diagram of the frame structure of this utility model. Figure 2 ;

[0042] Figure 5 This is a side view of the frame of this utility model;

[0043] In the attached figures, the following labels are used:

[0044] Frame 1, Combustion Area 2, Front Door 3, Inner Sealing Plate 4, Rear Door Plate 5, Copper Busbar 6, Circuit Breaker 7, Rear Sealing Plate 8, Air Outlet 9, Ventilation Louver 10, Copper Busbar Opening 11, Cable Opening 12, PCS Area 13, PCS AC Interface 14, PCS Unit Module 15, PCS DC Interface 16, Base 17, Bottom Opening 18, Base Opening 19, Front Sealing Plate 20, Air Inlet 21. Detailed Implementation

[0045] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0046] like Figure 1-5As shown, a centralized PCS cabinet includes a frame 1, a junction area 2, a PCS area 13, and a base 17; the internal space of the frame 1 is divided into upper and lower parts, the upper part is the junction area 2, the lower part is the PCS area 13, and the base 17 is fixedly connected to the bottom of the frame 1.

[0047] At least one circuit breaker 7 is fixedly connected in the busbar area 2. The input interface of the circuit breaker 7 is connected to the external transformer compartment through the copper busbar 6. The front side of the busbar area 2 is provided with an inner sealing plate 4 fixed to the frame 1 and a front door 3 hinged to the frame 1. The rear side of the busbar area 2 is provided with a rear door plate 5 fixed to the frame 1. The bottom of the busbar area 2 is provided with a bottom opening 18 that communicates with the PCS area 13.

[0048] A front sealing plate 20 and a rear sealing plate 8 are fixedly connected to the front and rear sides of the PCS area 13, respectively. A PCS unit module 15 corresponding to the number of circuit breakers 7 is fixedly connected inside the PCS area 13. A PCS AC interface 14 is connected to the upper part of the PCS unit module 15. The PCS AC interface 14 is connected to the output interface of the corresponding circuit breaker 7 through the bottom opening 18 of the combiner area 2 via an AC cable. A PCS DC interface 16 is connected to the lower part of the PCS unit module 15.

[0049] The base 17 has a base opening 19 that communicates with the PCS area 13, and an external DC cable passes through the base opening 19 to connect to the PCS DC interface 16.

[0050] Ventilation louvers 10 are embedded and connected to the right side of the manifold 2. By setting the ventilation louvers 10, ventilation and heat dissipation of the manifold 2 can be achieved.

[0051] Ventilation louvers 10 are louvers with an IP54 waterproof and dustproof rating. Using IP54-rated louvers ensures ventilation while effectively preventing water and dust from entering the collection area 2.

[0052] On the left side of the junction area 2, there is a copper busbar opening 11 and a cable opening 12. The copper busbar 6 passes through the copper busbar opening 11, and the external cable passes through the cable opening 12. By providing dedicated openings for the copper busbar 6 and the cable to pass through, installation and maintenance are facilitated.

[0053] The rear door panel 5 is fixed to the frame 1 with screws, and the joint between the rear door panel 5 and the frame 1 is sealed with expanding foam, forming a sealed structure around the junction area 2. This sealing treatment improves the waterproof performance of the junction area 2.

[0054] Circuit breaker 7 is a molded case circuit breaker. Molded case circuit breakers have good protective performance and reliability, and are suitable for use in PCS cabinets.

[0055] The rear cover plate 8 has multiple sets of air outlets 9 for ventilation of the PCS unit module 15, and the front cover plate 20 has multiple sets of air inlets 21 for ventilation of the PCS unit module 15. Air enters through the air inlets 21 and exits through the air outlets 9, which can ensure ventilation and heat dissipation of the PCS area 13 and ensure the normal operation of the PCS unit module 15.

[0056] Working principle

[0057] I. Core Principle of Electrical Energy Flow: DC to AC Conversion and Output

[0058] 1. DC power input and conversion

[0059] The DC power output from the external battery cluster enters the PCS area 13 directly through the base opening 19 on the base 17;

[0060] The DC power is precisely connected to the PCS DC interface 16 located at the lower part of the PCS unit module 15, and enters the interior of the PCS unit module 15.

[0061] PCS unit module 15 converts DC power into AC power that meets the requirements of the power grid, thus completing the conversion of electrical energy form.

[0062] 2. AC power collection and output

[0063] The converted AC power is output from the PCS AC interface 14 at the upper part of the PCS unit module 15;

[0064] The AC cable passes through the bottom opening 18 at the bottom of the junction area 2 and enters the upper junction area 2 directly;

[0065] The AC cable is connected to the output interface of the circuit breaker 7 fixed in the junction area 2 to realize the branch junction of AC power;

[0066] All the input interfaces of the circuit breakers 7 are connected through the copper busbar 6. The copper busbar 6 extends through the copper busbar opening 11 on the left side of the busbar area 2 to the external transformer compartment, and finally transmits the AC power to the power grid or the load end.

[0067] If other external auxiliary cables need to be connected, they can be inserted through the cable opening 12 on the left side of the junction area 2 and connected to the corresponding components.

[0068] II. Auxiliary Function Principles: Heat Dissipation, Protection, and Maintenance Guarantee

[0069] 1. Heat dissipation principle: Multi-zone coordinated heat dissipation ensures equipment stability.

[0070] Heat dissipation in hub area 2: The ventilation louvers 10 embedded on the right side of hub area 2 have an IP54 waterproof and dustproof rating to introduce external cold air. The cold air flows through the circuit breaker 7, copper busbar 6 and other heat-generating components in hub area 2, absorbs heat and then is discharged downward from the bottom opening 18 at the bottom of hub area 2 to PCS area 13, forming a convection channel of "air intake on the right side → air exhaust at the bottom", which reduces the internal temperature of hub area 2.

[0071] PCS Zone 13 Heat Dissipation: The front and rear sides of the PCS Zone 13 are fixedly connected to a front cover plate 20 and a rear cover plate 8, respectively. Multiple sets of air inlets 21 and air outlets 9 are opened on the front cover plate 20 and the rear cover plate 8, respectively. External air enters the PCS Zone 13 through the air inlet 21, carrying away the heat generated by the PCS unit module 15 during operation, and then is discharged from the air outlet 9, maintaining the stable operating temperature of the PCS unit module 15.

[0072] 2. Protection Principle: Multi-structure linkage blocks external risks.

[0073] Waterproof protection: The rear door panel 5 on the rear side of the manifold 2 is fixed to the frame 1 with screws, and the joint is sealed with expanding foam. Together with the inner sealing plate 4 on the front side of the manifold 2 and the hinged front door 3, a sealed structure is formed around the manifold 2 to block water from entering from the side and rear. Even if a small amount of water enters the manifold 2, it can be naturally drained into the foundation below the PCS area 13 through the bottom opening 18, avoiding water immersion in the components.

[0074] Cable protection: The front sealing plate 20 and rear sealing plate 8 on the front and rear sides of the PCS area 13 wrap the internal cables to prevent ultraviolet rays from directly irradiating the cables and delaying cable aging; the IP54-rated design of the ventilation louvers 10 can block dust and rainwater from entering the busbar area 2, reducing the failure of the circuit breaker 7 and copper busbar 6 due to dust accumulation and moisture.

[0075] 3. Maintenance and Support Principle: Structural Design Simplifies Operation

[0076] During routine inspections or operations, the front door 3 hinged to the front of the busbar area 2 can be opened directly, and the circuit breaker 7 and copper busbar 6 can be checked or operated by opening and closing through the operating space reserved by the inner sealing plate 4.

[0077] If in-depth maintenance of the rear components of the busbar 2 is required, the rear door panel 5 can be removed and fixed with screws to directly contact the rear structure of the busbar 2 without disassembling the entire frame 1 or other sealing plates, thus reducing maintenance difficulty.

[0078] III. Key Structure Label Association Logic

[0079] Frame 1: As an overall supporting structure, it separates the upper busbar area 2 and the lower PCS area 13, providing an installation reference for all components;

[0080] Circuit breaker 7: As an AC branch protection component, it is connected in series between the PCS AC interface 14 and the copper busbar 6. When the branch current is abnormal, it will automatically disconnect to protect the PCS unit module 15 and the power grid.

[0081] Bottom opening 18: It has the dual functions of "AC cable insertion" and "drainage of the busbar area", and is the core channel connecting PCS area 13 and busbar area 2.

[0082] Example 1

[0083] Outdoor conventional power storage PCS cabinet

[0084] I. Scene Positioning

[0085] Suitable for outdoor industrial and commercial energy storage power stations, compatible with commonly used industrial and commercial battery packs, and must meet outdoor waterproof and dustproof protection as well as wide temperature environment adaptability. The core requirements are waterproof reliability and convenient wiring.

[0086] II. Structural Configuration

[0087] Main frame: Frame 1 is welded from Q235A steel and its size is adapted to the installation requirements of conventional power PCS cabinets. The upper part is the combiner area 2, the lower part is the PCS area 13, and the bottom base 17 is reinforced with steel plate to ensure outdoor installation stability.

[0088] Busbar components: Busbar 2 has a built-in molded case circuit breaker 7 adapted to the power requirements, and parallel busbars are achieved through copper busbars 6 made of red copper. The right side of busbar 2 is fitted with ventilation louvers 10 with waterproof and dustproof rating, and the left side has a copper busbar opening 11 for the copper busbar 6 to pass through and a cable opening 12 for external cables to pass through. The cable opening 12 is equipped with a waterproof gland. The rear door panel 5 of busbar 2 is sealed with a double seal of sealing strip and foam at the joint with the frame 1 to enhance the waterproof effect.

[0089] PCS Area Components: PCS area 13 contains PCS unit modules 15 with power adaptability, arranged vertically side by side; PCS unit modules 15 have a PCS AC interface 14 at the top and a PCS DC interface 16 at the bottom; air inlets 21 and air outlets 9 are respectively opened on the front sealing plate 20 and rear sealing plate 8 on the front and rear sides of PCS area 13 to ensure heat dissipation of PCS unit modules 15.

[0090] Functional openings: The bottom of the junction area 2 is provided with a bottom opening 18 that communicates with the PCS area 13. The bottom opening 18 has an inclined drainage slope at the edge to facilitate the drainage of accumulated water. The base 17 is provided with a base opening 19 for DC cables to pass through. The base opening 19 is pre-installed with sealing components to reduce the risk of water ingress.

[0091] III. Work Process

[0092] The external battery pack DC power is connected to the PCS DC interface 16 of each PCS unit module 15 through the armored cable and the base opening 19 of the base 17.

[0093] PCS unit module 15 converts DC power into AC power that meets the grid requirements, outputs it from PCS AC interface 14, and connects it to the output terminal of circuit breaker 7 in combiner area 2 via a cable passing through the bottom opening 18.

[0094] All the input interfaces of the circuit breakers 7 are connected through the copper busbar 6. The copper busbar 6 passes through the copper busbar opening 11 on the left side of the busbar area 2 and is connected to the external transformer. The auxiliary control cable is connected through the cable opening 12 on the left side of the busbar area 2 to realize communication with the BMS system.

[0095] Heat dissipation process: External cold air enters the junction area 2 through the ventilation louvers 10 on the right side of the junction area 2, carrying away the heat generated by the circuit breaker 7 and copper busbar 6. It then enters the PCS area 13 through the air inlet 21 of the front cover plate 20, carrying away the heat generated by the PCS unit module 15. Finally, it is discharged outside the cabinet through the air outlet 9 of the rear cover plate 8 of the PCS area 13, forming a complete heat dissipation channel.

[0096] Example 2

[0097] Outdoor high-power energy storage PCS cabinet

[0098] I. Scene Positioning

[0099] Suitable for large-scale photovoltaic energy storage projects, it is compatible with commonly used battery packs in large-scale energy storage systems. It needs to meet the requirements of high current convergence, strong heat dissipation and rapid maintenance, and be able to adapt to complex outdoor temperature environments.

[0100] II. Structural Configuration

[0101] Main frame: Frame 1 adopts an H-beam reinforced structure, with dimensions adapted to the installation requirements of high-power PCS cabinets. The upper part is the junction area 2, the lower part is the PCS area 13, and the base 17 is equipped with pre-embedded anchor bolts to enhance the stability of outdoor installation.

[0102] Busbar components: Busbar 2 houses a high-breaking capacity molded case circuit breaker 7 adapted to high current requirements, arranged in a reasonable layout; the copper busbar 6 is made of pure copper with an anti-oxidation treatment and is equipped with insulating supports to ensure safety; multiple sets of ventilation louvers 10 with waterproof and dustproof ratings are embedded on the right side of busbar 2 to enhance heat dissipation; the left side of busbar 2 has a copper busbar opening 11 for the copper busbar 6 to pass through and a cable opening 12 for external cables to pass through, with the cable opening 12 equipped with a waterproof interface; the front door 3 of busbar 2 is equipped with an observation window, and the inner sealing plate 4 has a reserved operation window for easy operation of components;

[0103] PCS Area Components: The PCS area 13 contains a built-in high-power PCS unit module 15, arranged in two horizontal rows to optimize space utilization; the upper part of the PCS unit module 15 is provided with a PCS AC interface 14, and the lower part is provided with a PCS DC interface 16; the front sealing plate 20 and the rear sealing plate 8 on the front and rear sides of the PCS area 13 are respectively provided with multiple sets of air inlets 21 and air outlets 9, and the air inlets 21 and air outlets 9 are respectively provided with dust filters to reduce dust entry;

[0104] Functional openings: The bottom of the junction area 2 is provided with a bottom opening 18 that communicates with the PCS area 13. The bottom opening 18 is provided with a mesh guardrail to prevent foreign objects from entering. The base 17 is provided with a base opening 19 for DC cables to pass through. The base opening 19 is equipped with a flexible hose connector to facilitate cable installation and sealing.

[0105] III. Work Process

[0106] The external battery pack is connected to multiple ports, and the DC cable is connected to the PCS DC interface 16 of each PCS unit module 15 through the base opening 19 of the base 17.

[0107] After the DC power is inverted into AC power by the PCS unit module 15, it is output from the PCS AC interface 14 and passes through the bottom opening 18 of the combiner area 2 via a cable to connect to the corresponding circuit breaker 7 in the combiner area 2.

[0108] After multiple AC currents are combined through copper busbar 6, they are connected to an external transformer through copper busbar opening 11 on the left side of the combiner area 2, thus achieving grid connection.

[0109] Heat dissipation process: The ventilation louvers 10 on the right side of the junction area 2 enable double-sided air intake, forming an enhanced convection channel of "air intake on the right side → heat exchange in the junction area 2 → exhaust from the outlet 9 of the PCS area 13" and "air intake at the inlet 21 → heat exchange in the PCS area 13 → exhaust from the outlet 9", which effectively controls the operating temperature of the junction area 2 and ensures the stable operation of high-power components.

[0110] Example 3

[0111] Indoor small-scale energy storage PCS cabinet

[0112] I. Scene Positioning

[0113] Suitable for backup power storage systems in data centers, installed in indoor power distribution rooms, adaptable to limited indoor spaces, and required to meet low-noise operation and basic protection requirements. The core requirements are compact structure and easy maintenance.

[0114] II. Structural Configuration

[0115] Main frame: Frame 1 is made of aluminum alloy profile splicing, and its size is suitable for small indoor spaces. The upper part is the junction area 2, the lower part is the PCS area 13, and the bottom base 17 is a flat design, which is convenient for indoor placement.

[0116] Busbar components: Busbar 2 has a built-in molded case circuit breaker 7 adapted to the current requirements of small energy storage, connected by a copper busbar 6 made of red copper; ventilation louvers 10 with basic protection level are embedded on the right side of busbar 2; copper busbar opening 11 for copper busbar 6 to pass through and cable opening 12 for external cables to pass through are opened on the left side of busbar 2, and the cable opening 12 is equipped with a standard gland; the rear door panel 5 of busbar 2 is connected to the frame 1 with a quick-release buckle for easy maintenance;

[0117] PCS Area Components: PCS area 13 contains PCS unit modules 15 adapted to small energy storage power, arranged vertically side by side to save space; PCS unit modules 15 have a PCS AC interface 14 at the top and a PCS DC interface 16 at the bottom; air inlets 21 and air outlets 9 are respectively opened on the front sealing plate 20 and rear sealing plate 8 on the front and rear sides of PCS area 13, and sound-absorbing cotton is built into the air inlets 21 and air outlets 9 to reduce operating noise;

[0118] Functional openings: The bottom of the junction area 2 is provided with a bottom opening 18 that communicates with the PCS area 13; the base 17 is provided with a base opening 19 for DC cables to pass through, which meets the requirements for indoor cable layout.

[0119] III. Work Process

[0120] The DC power of the indoor battery pack is transmitted through cables and connected to the PCS DC interface 16 of each PCS unit module 15 via the base opening 19 of the base 17.

[0121] The DC power is inverted by the PCS unit module 15 and output from the PCS AC interface 14. It is then connected to the circuit breaker 7 through the bottom opening 18 of the combiner area 2 via a cable.

[0122] Multiple AC power supplies are combined via copper busbar 6 and connected to the data center power distribution system through copper busbar opening 11 on the left side of the combiner area 2, serving as backup power.

[0123] Heat dissipation process: Relying on natural indoor ventilation, cold air enters the confluence zone 2 through the ventilation louvers 10 on the right side of the confluence zone 2. The cold air enters the PCS zone 13 through the air inlet 21 with sound-absorbing cotton on the front sealing plate 20, and is then discharged through the air outlet 9 with sound-absorbing cotton on the rear sealing plate 8, achieving low-noise heat dissipation.

[0124] The examples provided in this utility model are not intended to limit the implementation methods. Those skilled in the art will recognize that various variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementation methods here, and any obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A centralized PCS cabinet, characterized in that, It includes a frame (1), a busbar area (2), a PCS area (13) and a base (17); the internal space of the frame (1) is divided into two parts, the upper part is the busbar area (2) and the lower part is the PCS area (13), and the base (17) is fixedly connected to the bottom of the frame (1); At least one circuit breaker (7) is fixedly connected in the busbar area (2). The input interface of the circuit breaker (7) is connected to the external transformer compartment through a copper busbar (6). The front side of the busbar area (2) is provided with an inner sealing plate (4) fixed to the frame (1) and a front door (3) hinged to the frame (1). The rear side of the busbar area (2) is provided with a rear door plate (5) fixed to the frame (1). The bottom of the busbar area (2) is provided with a bottom opening (18) that communicates with the PCS area (13). The front and rear sealing plates (20 and 8) are fixedly connected to the front and rear sides of the PCS area (13), respectively. The PCS area (13) is fixedly connected to a PCS unit module (15) corresponding to the number of circuit breakers (7). The upper part of the PCS unit module (15) is connected to a PCS AC interface (14). The PCS AC interface (14) is connected to the output interface of the corresponding circuit breaker (7) through the bottom opening (18) of the busbar area (2) via an AC cable. The lower part of the PCS unit module (15) is connected to a PCS DC interface (16). The base (17) has a base opening (19) that communicates with the PCS area (13), and an external DC cable passes through the base opening (19) and connects to the PCS DC interface (16).

2. A centralized PCS cabinet according to claim 1, characterized in that, Ventilation louvers (10) are inlaid and connected to the right side of the confluence area (2).

3. A centralized PCS cabinet according to claim 2, characterized in that, The ventilation louvers (10) are louvers with an IP54 waterproof and dustproof rating.

4. A centralized PCS cabinet according to claim 1, characterized in that, The busbar (2) has a copper busbar opening (11) and a cable opening (12) on the left side. The copper busbar (6) passes through the copper busbar opening (11) and the external cable passes through the cable opening (12).

5. A centralized PCS cabinet according to claim 1, characterized in that, The rear door panel (5) is fixed to the frame (1) with screws. The joint between the rear door panel (5) and the frame (1) is sealed with foam adhesive, so that the busbar area (2) forms a sealed structure on all four sides.

6. A centralized PCS cabinet according to claim 1, characterized in that, The circuit breaker (7) is a molded case circuit breaker.

7. A centralized PCS cabinet according to claim 1, characterized in that, The rear cover plate (8) has multiple sets of air outlets (9) for ventilation of the PCS unit module (15), and the front cover plate (20) has multiple sets of air inlets (21) for ventilation of the PCS unit module (15).

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