Liquid cooling outdoor cabinet AC distribution box

Abstract

The utility model relates to the technical field of distribution boxes, and provides a liquid cooling outdoor cabinet AC distribution box, and the left end of the front surface of the AC distribution box is provided with a power grid three-phase power supply wire inlet, a 24V power supply port, an indicating lamp dehumidifier power port, and a liquid cooling unit power port. A surge protector, a backup protector, a three-phase multifunctional electric meter, a station electric circuit breaker, a liquid cooling host circuit breaker, an AC / DC power supply module circuit breaker, a dehumidifier circuit breaker, a reserved circuit breaker and a socket circuit breaker are sequentially arranged in the middle of the front face of the AC distribution box side by side. The right end of the front surface of the AC distribution box is provided with a network port, an emergency stop access port, a customer general meter port, a communication port and a fire-fighting port. According to the utility model, integration of AC power distribution and system control can be well realized.

Description

Technical Field

[0001] This utility model relates to the field of distribution box technology, specifically to a liquid-cooled outdoor AC distribution box. Background Technology

[0002] Commercial and industrial energy storage is a typical application of distributed energy storage systems on the user side. Its characteristics include proximity to both distributed photovoltaic power sources and load centers, effectively improving the absorption rate of clean energy and reducing transmission losses. Unlike large-scale energy storage power plants for peak shaving and frequency regulation, commercial and industrial energy storage systems primarily aim to achieve a return on investment by utilizing the peak-valley price difference in the power grid. The main load is to meet the internal electricity needs of the industrial and commercial sector, maximizing self-consumption of photovoltaic power generation or profiting from peak-valley price arbitrage. The system includes a battery management system (BMU), power supply system (PCS), power supply system (EMS), transformers, racks, connecting cables, combiner cabinets, lightning protection and grounding systems, monitoring and alarm systems, etc. All systems are modularly designed, allowing for flexible configuration of system voltage and capacity.

[0003] For AC power distribution in liquid-cooled outdoor cabinets, existing technologies generally involve installing circuit breakers externally or directly on the cabinet panel, which is very messy and troublesome to maintain. Utility Model Content

[0004] The present invention provides a liquid-cooled outdoor AC distribution box that overcomes some or all of the defects of the prior art.

[0005] According to the present invention, an AC power distribution box for a liquid-cooled outdoor cabinet is provided on the left side of the front of the AC power distribution box, which has a three-phase power grid inlet, a 24V power supply outlet, an indicator light dehumidifier power outlet, and a liquid-cooled unit power outlet.

[0006] The AC distribution box has a surge protector, backup protector, three-phase multi-function meter, station power circuit breaker, liquid cooling host circuit breaker, AC / DC power module circuit breaker, dehumidifier circuit breaker, reserved circuit breaker and socket circuit breaker arranged side by side in the middle of the front.

[0007] The right side of the front of the AC distribution box is equipped with a network port, an emergency stop access control port, a customer main meter port, a communication port, and a fire protection port.

[0008] As a preferred option, the left end of the front of the AC distribution box is also equipped with a molded case circuit breaker operating handle.

[0009] As a preferred option, the AC distribution box is equipped with terminal blocks, intermediate relay modules, AC / DC modules, and a smart gateway.

[0010] Intermediate relay module, used for system control via smart gateway;

[0011] The AC / DC module is used in conjunction with a diode module, a molded case circuit breaker, and a current transformer.

[0012] Preferably, the terminal block includes a double-layer terminal block X1 and a double-layer terminal block X2. The double-layer terminal block X1 is used for power supply to the entire AC distribution box system, and the double-layer terminal block X2 is used to connect the auxiliary contacts of the circuit breaker and the remote signaling contacts for surges.

[0013] Preferably, the smart gateway includes 8 DI and DO inputs and outputs.

[0014] As a preferred option, the AC distribution box also has a cable tray module inside.

[0015] As a preferred option, the back of the AC distribution box is equipped with a 24V high-voltage box power interface, a PCS fan power port, a water immersion sensor control signal and power interface, a three-phase power interface 204, and a power control switch.

[0016] The 24V high-voltage box power interface is used to connect to the high-voltage box;

[0017] The PCS fan power connector is used to power the PCS cooling fan.

[0018] The water immersion sensor control signal and power interface are used for signal transmission and control of the water immersion sensor.

[0019] The three-phase power interface is used for three-phase power supply to the PCS;

[0020] The power control switch is used to control the on / off state of the 24V power supply to the AC distribution box.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model integrates circuit breakers, intermediate relays, meter modules, I / O modules, AC / DC modules, and diode modules required for AC power distribution. The modules are divided according to their functions, and the power ports of the fire protection module, emergency stop access control module, communication module, indicator lights, dehumidifier, and liquid cooling unit are all divided into wiring areas on the panel, achieving the integration of AC power distribution and system control. Attached Figure Description

[0023] Figure 1 This is a front view of a liquid-cooled outdoor AC distribution box as described in the embodiment.

[0024] Figure 2 This is an internal schematic diagram of a liquid-cooled outdoor AC distribution box as described in the embodiment;

[0025] Figure 3 This is a schematic diagram of the back of a liquid-cooled outdoor AC distribution box as described in the embodiment;

[0026] Figure 4 This is a DC power distribution schematic diagram illustrating the interaction between the DC / DC module of the high-voltage box and the AC / DC module of the liquid-cooled outdoor cabinet in the liquid-cooled outdoor cabinet system. Detailed Implementation

[0027] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it. Example

[0028] like Figure 1-3 As shown, this embodiment provides a liquid-cooled outdoor cabinet AC power distribution box. The left end of the front of the AC power distribution box is provided with a three-phase power grid inlet 13, a 24V power supply outlet 10, an indicator dehumidifier power outlet 11, a liquid-cooled unit power outlet 12, and a molded case circuit breaker operating handle 14.

[0029] The AC distribution box has surge protector 15, backup protector 16, three-phase multi-function meter 17, station power circuit breaker 18, liquid cooling host circuit breaker 19, AC / DC power module circuit breaker 20, dehumidifier circuit breaker 21, reserved circuit breaker 22 and socket circuit breaker 23 arranged side by side in the middle of the front.

[0030] The right side of the front of the AC distribution box is equipped with a network port 24, an emergency stop access control port 25, a customer main meter port 26, a communication port 27, and a fire protection port 28.

[0031] The AC distribution box is equipped with a terminal block 101, an intermediate relay module 102, an AC / DC module 103, a smart gateway 104, and a cable tray module 108. The intermediate relay module 102 is used for system control through the smart gateway 104. The AC / DC module 103 is equipped with a diode module 107, a molded case circuit breaker 105, and a current transformer 106.

[0032] Terminal block 101 includes double-layer terminal block X1 and double-layer terminal block X2. Double-layer terminal block X1 is used for power supply to the entire AC distribution box system, and double-layer terminal block X2 is used to connect the auxiliary contacts of the circuit breaker and the remote signaling contacts for surge protection. Intelligent gateway 104 includes 8 DI and DO inputs and outputs.

[0033] The back of the AC distribution box is equipped with a 24V high-voltage box power interface 201, a PCS fan power port 202, a water immersion sensor control signal and power interface 203, a three-phase power interface 204, and a power control switch 205. The 24V high-voltage box power interface 201 is used to connect to the high-voltage box; the PCS fan power port 202 is used to power the PCS cooling fan; the water immersion sensor control signal and power interface 203 is used for signal transmission and control of the water immersion sensor; the three-phase power interface 204 is used for three-phase power supply to the PCS; and the power control switch 205 is used to control the on / off of the 24V power supply to the AC distribution box.

[0034] A three-phase power supply is connected from the grid side to the three-phase power inlet 13 of the AC distribution box. A current transformer 106 is installed on each of these three phases. The current reading of the three-phase multi-function meter 18 is obtained by connecting to pins S1 and S2 of the current transformer 106. Note that pins P1 and P2 of the current transformer 106 must not be reversed; P1 faces the three-phase power inlet 13. Shunt trip coils are also installed at the station service circuit breaker 18, the molded case circuit breaker 105, and the liquid-cooled unit circuit breaker 19. The power supply for the shunt trip coil of the station service circuit breaker 18 is taken from the lower port of the station service circuit breaker 18; the power supply for the shunt trip coil of the molded case circuit breaker 105 is taken from the lower port of the molded case circuit breaker 105; and the power supply for the shunt trip coil of the liquid-cooled unit circuit breaker 19 is taken from the lower port of the liquid-cooled unit circuit breaker 19.

[0035] Communication port 27 can be designed as one or more according to actual requirements, and the communication signal routing of each module can be selected according to the actual situation. Communication port 27 mainly connects to the RS485 communication signal from the intelligent gateway 104, and externally mainly connects to the high-voltage box, PCS, fire controller, and dehumidifier's RS485 communication signals. Since the three-phase multi-function meter 17 is inside the AC distribution box, it can be directly connected through the intelligent gateway 104 without needing to be converted through communication port 27.

[0036] The 24V power supply port 10 is used to connect the power supply to the EMS energy management system and the switch. When three or more liquid-cooled outdoor cabinets are connected in parallel, a switch is required, so a power interface for the switch needs to be reserved in advance.

[0037] Figure 4The principle of DC power distribution for the liquid-cooled outdoor cabinet in this embodiment is explained in detail. AC power is supplied to the AC / DC power module 103 through the lower port of the AC / DC power module circuit breaker 20. The power control switch K1 of the AC distribution box controls the on / off state of the 24V power supply to this AC box. The positive output of the 24V power supply from the AC / DC module 103 in the AC distribution box and the DC / DC module in the high-voltage box is connected together through two diodes to supply power to the high-voltage box, the AC distribution box, and the 24V equipment on the cabinet. K2 in the high-voltage box is the power control switch for the high-voltage box.

[0038] Figure 2 The intermediate relay module 103 is configured to allocate the control module of each intermediate relay according to the system's control logic. The smart gateway in this embodiment has eight DO output ports, and the control module corresponding to each output port is selected based on the battery management system and software control. Meanwhile, addressing the issue of the relatively large size and space-consuming nature of the intermediate relays, this embodiment proposes a solution: the control logic of several intermediate relays within the AC distribution box can be integrated into a PCB board, reducing the size of the intermediate relays and thus achieving diversified utilization of the AC distribution box space. This optimization reduces the number of intermediate relay wiring pins, completing the wiring internally via the PCB board, which improves the efficiency of wiring in later production lines and avoids the problem of incorrect intermediate relay pin connections. Figure 2 The terminal block 101 includes a double-layer terminal block X1 and a double-layer terminal block X2. The double-layer design is chosen to make efficient use of the space in the AC distribution box. Double-layer terminal block X1 contains the DC power supply for various component modules and serves as the power interface in the entire AC distribution box system. Double-layer terminal block X2 mainly connects the auxiliary contacts of circuit breakers at the DI input of some smart gateways and the remote signaling contacts for surge protection.

[0039] This embodiment divides the wiring ports into modules based on function, enabling rapid troubleshooting and resolution of problems that may arise with the liquid-cooled outdoor cabinet later on. The AC distribution box integrates the AC circuit breaker and I / O system intermediate relay control modules, and also incorporates an AC / DC power supply module, achieving integrated AC power distribution and control for the liquid-cooled outdoor cabinet. This embodiment makes efficient use of the AC distribution box space, proposing a PCB board module for intermediate relay wiring and a double-layer terminal block module. During later assembly on the production line, the connection of the intermediate relays avoids problems caused by incorrect relay pin connections, significantly improving the efficiency of wiring in production line operations.

[0040] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A liquid-cooled outdoor AC distribution box, characterized in that: The front left end of the AC distribution box is equipped with a three-phase power grid inlet (13), a 24V power supply outlet (10), an indicator dehumidifier power outlet (11), and a liquid chiller power outlet (12). The AC distribution box is equipped with surge protector (15), backup protector (16), three-phase multi-function meter (17), station power circuit breaker (18), liquid cooling host circuit breaker (19), AC / DC power module circuit breaker (20), dehumidifier circuit breaker (21), reserved circuit breaker (22) and socket circuit breaker (23) in the middle of the front. The right side of the front of the AC distribution box is equipped with a network port (24), an emergency stop access control port (25), a customer main meter port (26), a communication port (27), and a fire protection port (28).

2. The liquid-cooled outdoor AC distribution box according to claim 1, characterized in that: The left end of the front of the AC distribution box is also equipped with a molded case circuit breaker operating handle (14).

3. The liquid-cooled outdoor AC distribution box according to claim 1, characterized in that: The AC distribution box is equipped with a terminal block (101), an intermediate relay module (102), an AC / DC module (103), and a smart gateway (104). An intermediate relay module (102) is used for system control via a smart gateway (104); The AC / DC module (103) is equipped with a diode module (107), a molded case circuit breaker (105), and a current transformer (106).

4. The liquid-cooled outdoor AC distribution box according to claim 3, characterized in that: The terminal block (101) includes a double-layer terminal block X1 and a double-layer terminal block X2. The double-layer terminal block X1 is used for power supply of the entire AC distribution box system, and the double-layer terminal block X2 is used to connect the auxiliary contacts of the circuit breaker and the remote signaling contacts of the surge.

5. The liquid-cooled outdoor AC distribution box according to claim 3, characterized in that: The smart gateway (104) includes 8 DI and DO inputs and outputs.

6. The liquid-cooled outdoor AC distribution box according to claim 3, characterized in that: The AC distribution box also has a cable tray module (108) inside.

7. The liquid-cooled outdoor AC distribution box according to claim 1, characterized in that: The back of the AC distribution box is equipped with a 24V-high voltage box power interface (201), a PCS fan power port (202), a water immersion sensor control signal and power interface (203), a three-phase power interface (204), and a power control switch (205). The 24V high-voltage box power interface (201) is used to connect the high-voltage box; The PCS fan power port (202) is used to power the PCS cooling fan; The water immersion sensor control signal and power interface (203) is used for signal transmission and control of the water immersion sensor; The three-phase power interface (204) is used for three-phase power supply to the PCS; The power control switch (205) is used to control the on / off of the 24V power supply to the AC distribution box.

Images