New air system of underground energy storage power station and underground energy storage power station

Abstract

The application belongs to the technical field of new energy storage technology, and discloses a fresh air system of an underground energy storage power station and the underground energy storage power station. The fresh air system of the underground energy storage power station comprises a fresh air supply assembly and a fresh air exhaust assembly. The fresh air supply assembly comprises an air supply port, an air supply fan and a fresh air pipeline. An outer ventilation window and an inner ventilation window are arranged on the fresh air pipeline. The air supply fan sends cold air to the battery cluster through the outer ventilation window. The air supply fan sends the cold air back to the battery cluster through the inner ventilation window. The fresh air exhaust assembly comprises an air exhaust port, an air exhaust fan and an air exhaust pipeline. The air exhaust fan is used for exhausting the gas in the battery chamber. When the air is circulated outside, the outer ventilation window is opened, the inner ventilation window is closed, the air supply fan sends the cold air to the battery cluster, and the air exhaust fan exhausts the high-temperature gas. When the air is circulated inside, the air exhaust fan and the outer ventilation window are closed, the inner ventilation window is opened, and the air supply fan circulates and delivers the cold air in the battery chamber to the battery cluster. Therefore, when the air is circulated inside, the air conditioner does not need to be turned on, so that the power consumption is reduced and the cost is lowered.

Description

Technical Field

[0001] This invention relates to the field of new energy storage technology, and in particular to a fresh air system for an underground energy storage power station and an underground energy storage power station. Background Technology

[0002] Energy storage power stations serve a peak-shaving function and are commonly used for energy storage in new energy power plants. Existing lithium-ion battery-based energy storage power stations are mostly containerized and placed on the ground, requiring a certain amount of floor space. When some batteries experience thermal runaway, a chain reaction can easily occur, triggering thermal runaway accidents in other batteries. Furthermore, due to the characteristics of lithium-ion batteries, fires after thermal runaway are difficult to extinguish, posing certain safety hazards and potentially causing injuries or fatalities.

[0003] There is currently an underground energy storage power station that places the entire energy storage power station underground. By using a ventilation system to cool the internal battery clusters, the probability of thermal runaway is reduced. Even if the underground energy storage power station catches fire, it can be quickly and completely extinguished, greatly reducing the risk of damage to personnel and surrounding facilities.

[0004] However, current underground energy storage power stations typically add air coolers to the ventilation system to cool down the battery clusters. The air coolers continuously supply cold air to the basement of the energy storage power station through the ventilation system. Due to the large scale of the energy storage power station and the large number of devices, the ventilation system needs to supply cold air to various areas, resulting in extremely high power consumption of the air coolers, serious waste of resources, and high costs. Summary of the Invention

[0005] The purpose of this invention is to provide a fresh air system and an underground energy storage power station for underground energy storage power stations, thereby reducing power consumption, minimizing resource waste, and lowering costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On one hand, a fresh air system for an underground energy storage power station is provided, wherein the underground energy storage power station includes a battery room for storing battery clusters and related components, and the fresh air system for the underground energy storage power station includes:

[0008] The fresh air supply assembly includes an air outlet, a blower, and a fresh air duct. The air outlet is located on the ground, and the fresh air duct is connected to the air outlet and connects to the air conditioning unit and the battery compartment. The blower is located on the side of the fresh air duct near the air outlet. The fresh air duct is equipped with an external ventilation window and an internal ventilation window. The external ventilation window is located inside the fresh air duct, and the blower delivers cold air from the air conditioning unit to the battery cluster through the external ventilation window. The internal ventilation window is located on the side wall of the fresh air duct, and the blower delivers cold air from the battery compartment back to the battery cluster through the internal ventilation window. The external ventilation window and the internal ventilation window have opposite opening and closing states.

[0009] The fresh air exhaust assembly includes an exhaust vent, an exhaust fan, and an exhaust duct. The exhaust vent is located on the ground, and the exhaust duct is connected to the exhaust vent and connects to the outside and the battery compartment. The exhaust fan is located at the exhaust vent and is used to exhaust the gas inside the battery compartment.

[0010] Optionally, the fresh air supply assembly further includes:

[0011] A temperature sensor, used to detect the temperature inside the battery compartment;

[0012] A temperature control unit is used to control the opening and closing of the external ventilation window and the internal ventilation window, as well as the start and stop of the exhaust fan and the supply fan, based on the signal from the temperature sensor.

[0013] Optionally, the fresh air duct is a trapezoidal duct that is wider at the front and narrower at the back.

[0014] Optionally, the fresh air system of the underground energy storage power station further includes:

[0015] The first post-disaster air supply assembly includes a first post-disaster blower and a first fresh air bypass duct. The first post-disaster blower is connected to the fresh air duct through the first fresh air bypass duct.

[0016] The first post-disaster smoke exhaust assembly includes a post-disaster smoke exhaust outlet, a post-disaster smoke exhaust pipe, and a first post-disaster smoke exhaust machine. The post-disaster smoke exhaust outlet is located on the ground. The post-disaster smoke exhaust pipe connects the smoke exhaust outlet and the battery room. The first post-disaster smoke exhaust machine is used to exhaust the smoke in the battery room to the outside through the post-disaster smoke exhaust pipe.

[0017] Optionally, the first post-disaster smoke extraction assembly further includes:

[0018] A smoke detector, used to detect the smoke concentration in the battery compartment;

[0019] The smoke control host is used to control the opening and closing of the post-disaster smoke exhaust port and the start and stop of the first post-disaster smoke exhaust fan according to the signal of the smoke detector.

[0020] On the other hand, an underground energy storage power station is provided, including a fresh air system for the underground energy storage power station as described in any of the preceding claims.

[0021] Optionally, the underground energy storage power station further includes a fire protection system, which includes a gas fire extinguisher located at the top of the battery room and used to spray fire extinguishing gas into the battery room.

[0022] Optionally, the fire protection system further includes a liquid fire extinguisher, which is located on the top of the battery compartment and is used to spray fire extinguishing liquid into the battery compartment.

[0023] Optionally, the fire protection system further includes a fire protection system control panel, which is used to control the start and stop of the gas fire extinguisher and the liquid fire extinguisher.

[0024] Optionally, the underground energy storage power station further includes a drainage system, which includes a drainage ditch surrounding the battery room and a water storage tank connected to the drainage ditch. The drainage ditch is used to collect the fire-fighting liquid into the water storage tank. The drainage system also includes a drainage pump, which is used to discharge the fire-fighting liquid from the water storage tank.

[0025] The beneficial effects of this invention are:

[0026] This invention provides a fresh air system and an underground energy storage power station. By installing external and internal ventilation windows on the fresh air duct, the battery compartment can achieve both internal and external circulation for heat dissipation. During external circulation, the external ventilation windows are open, the internal ventilation windows are closed, and the supply fan delivers cool air from the cooling equipment to the battery clusters through the air outlets. In conjunction with the exhaust fan, the high-temperature gas inside the battery compartment is discharged through the exhaust outlets, thus ensuring that the temperature of the battery clusters is controlled within a reasonable range. When the temperature of the battery clusters is within the allowable range, the exhaust fan and external ventilation windows are closed, the internal ventilation windows are opened, and the supply fan recirculates the cool air from inside the battery compartment to the battery clusters. By alternating between internal and external circulation to control the temperature of the battery clusters, the cooling equipment does not need to be turned on during internal circulation, avoiding prolonged operation of the cooling equipment, thereby reducing power consumption, resource waste, and costs. Attached Figure Description

[0027] Figure 1 This is an internal top view of the fresh air system of the underground energy storage power station of the present invention;

[0028] Figure 2 yes Figure 1Enlarged view of part A;

[0029] Figure 3 This is an internal front view of the fresh air system of the underground energy storage power station of the present invention;

[0030] Figure 4 This is an internal side view of the fresh air system of the underground energy storage power station of the present invention;

[0031] Figure 5 This is a top-ground view of the fresh air system of the underground energy storage power station of the present invention.

[0032] In the picture:

[0033] 100. Battery cluster; 200. Battery room; 300. Escalator room; 301. Escalator; 400. Lifting opening; 500. Equipment room; 501. Fire cabinet; 502. Ladder entrance; 503. Ladder;

[0034] 1. Fresh air supply assembly; 11. Air outlet; 12. Blower; 13. Fresh air duct; 131. External ventilation window; 132. Internal ventilation window;

[0035] 2. Fresh air and exhaust system; 21. Exhaust vent; 22. Exhaust fan; 23. Exhaust duct;

[0036] 3. First post-disaster air supply assembly; 31. First post-disaster blower; 32. First fresh air bypass duct;

[0037] 4. First post-disaster smoke exhaust assembly; 41. Post-disaster smoke exhaust outlet; 42. Post-disaster smoke exhaust pipe; 43. First post-disaster smoke exhaust fan;

[0038] 5. Second post-disaster air supply assembly; 51. Second post-disaster blower; 52. Second fresh air bypass duct;

[0039] 6. Second post-disaster smoke exhaust assembly; 61. Second post-disaster smoke exhaust fan; 62. Post-disaster smoke exhaust bypass pipe;

[0040] 7. Lighting;

[0041] 8. Gas fire extinguishers;

[0042] 9. Water storage tank. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0044] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0047] To avoid prolonged operation of air conditioning equipment, reduce power consumption, minimize resource waste, and lower costs, this embodiment provides a fresh air system and an underground energy storage power station. The underground energy storage power station includes a fresh air system and a battery room 200 for storing battery clusters 100 and related components.

[0048] like Figures 1 to 5As shown, the fresh air system of this underground energy storage power station includes a fresh air supply component 1 and a fresh air exhaust component 2. The fresh air supply component 1 includes an air outlet 11, a blower 12, and a fresh air duct 13. The air outlet 11 is located on the ground, and the fresh air duct 13 connects to the air outlet 11, connecting the cooling equipment and the battery room 200. The blower 12 is located on the side of the fresh air duct 13 near the air outlet 11. The fresh air duct 13 is equipped with an external ventilation window 131 and an internal ventilation window 132. The external ventilation window 131 is located inside the fresh air duct 13, and the blower 12 delivers cold air from the cooling equipment to the battery cluster 100 through the external ventilation window 131. The internal ventilation window 132... 32 is located on the side wall of the fresh air duct 13. The blower 12 sends the cold air in the battery compartment 200 back to the battery cluster 100 through the inner ventilation window 132. The outer ventilation window 131 and the inner ventilation window 132 are in opposite opening and closing states. The fresh air exhaust assembly 2 includes an exhaust port 21, an exhaust fan 22 and an exhaust duct 23. The exhaust port 21 is located on the ground. The exhaust duct 23 is connected to the exhaust port 21 and connects to the outside and the battery compartment 200. The exhaust fan 22 is located at the exhaust port 21 and is used to exhaust the gas in the battery compartment 200.

[0049] By installing external ventilation windows 131 and internal ventilation windows 132 on the fresh air duct 13, the battery compartment 200 can dissipate heat through both internal and external circulation. During external circulation, external ventilation window 131 is open, internal ventilation window 132 is closed, and the supply fan 12 delivers cool air from the air conditioning unit to the battery cluster 100 through the air inlet. Working in conjunction with the exhaust fan 22, it exhausts the high-temperature gas inside the battery compartment 200 through the air outlet, thereby rapidly reducing the temperature inside the battery compartment 200 and ensuring that the temperature of the battery cluster 100 is controlled within a reasonable range. When the temperature of the battery cluster 100 is within the allowable range, the exhaust fan 22 and external ventilation window 131 are closed, and internal ventilation window 132 is opened. The supply fan 12 then recirculates the cool air from inside the battery compartment 200 back to the battery cluster 100. By alternating between internal and external circulation to control the temperature of the battery cluster 100, the air conditioning unit does not need to be turned on during internal circulation, avoiding prolonged operation of the air conditioning unit, thus reducing power consumption, resource waste, and costs.

[0050] like Figure 1As shown, in this embodiment, the energy storage power station is entirely underground. Besides a battery room 200 for housing the battery clusters 100 and related components, it also includes an escalator room 300 with an escalator 301 for easy access by staff. Furthermore, a hoisting opening 400 for transporting equipment underground is provided on the ground. To ensure effective ventilation of the fresh air system, two air supply outlets 11 and two air exhaust outlets 21 are provided on the ground, and filters are installed at both outlets to prevent debris from entering the fresh air system. In addition, the exhaust fan 22 in this embodiment is an axial flow fan, and the supply fan 12 is a centrifugal fan.

[0051] Optionally, such as Figure 1 , Figure 4 As shown, the fresh air supply assembly 1 also includes a temperature sensor and a temperature control unit. The temperature sensor is used to detect the temperature inside the battery compartment 200, and the temperature control unit is used to control the opening and closing of the external ventilation window 131 and the internal ventilation window 132, as well as the start and stop of the exhaust fan 22 and the supply fan 12, based on the signal from the temperature sensor. By using the temperature sensor and the temperature control unit, the internal and external circulation systems can be controlled at any time according to the temperature inside the battery compartment 200 to dissipate heat from the battery cluster 100 inside the battery compartment 200, thereby ensuring that the battery cluster 100 is always kept within the allowable value range, reducing the probability of thermal runaway of the battery cluster 100, and reducing the possibility of fire. In this embodiment, both the external ventilation window 131 and the internal ventilation window 132 are electric louvers, which facilitates the electric control of the temperature control unit to open and close the external ventilation window 131 and the internal ventilation window 132.

[0052] Optionally, such as Figure 1 As shown, the fresh air duct 13 is a trapezoidal duct that is wider at the front and narrower at the back. By using a trapezoidal duct that is wider at the front and narrower at the back, the airflow at the end of the duct is more concentrated, ensuring that the gas can be evenly delivered to all parts of the battery cluster 100. In this embodiment, since there are two air inlets, there are also two fresh air ducts 13.

[0053] Optionally, such as Figure 1 , Figure 3As shown, the fresh air system of the underground energy storage power station also includes a first post-disaster air supply component 3 and a first post-disaster smoke exhaust component 4. The first post-disaster air supply component 3 includes a first post-disaster blower 31 and a first fresh air bypass duct 32. The first post-disaster blower 31 is connected to the fresh air duct 13 via the first fresh air bypass duct 32. The first post-disaster smoke exhaust component 4 includes a post-disaster smoke exhaust outlet 41, a post-disaster smoke exhaust pipe 42, and a first post-disaster smoke exhaust fan 43. The post-disaster smoke exhaust outlet 41 is located on the ground. The post-disaster smoke exhaust pipe 42 connects the smoke exhaust outlet and the battery room 200. The first post-disaster smoke exhaust fan 43 is used to exhaust the smoke in the battery room 200 to the outside through the post-disaster smoke exhaust pipe 42. This allows the smoke in the battery room 200 to be cleared as quickly as possible after the fire ends, facilitating reconstruction work.

[0054] Furthermore, the first post-disaster smoke exhaust assembly 4 also includes a smoke detector and a smoke control host. The smoke detector is used to detect the smoke concentration in the battery compartment 200, and the smoke control host is used to control the opening and closing of the post-disaster smoke exhaust port 41 and the start and stop of the first post-disaster smoke exhaust fan 43 based on the signal from the smoke detector. By setting up a smoke detector and a smoke control host to automatically control the emission of smoke from the battery compartment 200 according to the smoke concentration, the automation level of the system is improved and the workload of the operators is reduced.

[0055] In this embodiment, both the smoke control host and the temperature control host can be controlled through a BMS (Building Management System). The BMS is a comprehensive management system for building equipment monitoring and public safety systems. This system can be configured with the following management, control, monitoring, display, and fault alarm functions based on the building equipment: refrigeration system, heating system, chilled water and cooling water temperature and pressure, chilled water pumps and cooling water pumps, cooling tower fans, air conditioning units, variable air volume (VAV) system, supply and exhaust ventilation system, water supply system and sewage treatment system pumps and levels, power supply and distribution system, lighting, elevators and escalators 301, etc. When heating, refrigeration, air conditioning, water supply and drainage, power, lighting, and elevator systems use separate professional monitoring systems, they should be integrated into the building equipment management system through a communication interface.

[0056] like Figure 1 , Figure 3As shown, in order to house and manage the BMS system, the underground energy storage power station is also equipped with an equipment room 500. In order to avoid the impact of fire, a second post-disaster air supply assembly 5 is also installed in the equipment room 500. The second post-disaster air supply assembly 5 includes a second post-disaster blower 51 and a second fresh air bypass duct 52. The second post-disaster blower 51 is connected to the fresh air duct 13 through the second fresh air bypass duct 52. Since there are two fresh air ducts 13, the first fresh air bypass duct 32 and the second fresh air bypass duct 52 are each connected to one of the fresh air ducts 13. The equipment room 500 is also equipped with a second post-disaster smoke exhaust assembly 6. The second post-disaster smoke exhaust assembly 6 includes a second post-disaster smoke exhaust fan 61 and a post-disaster smoke exhaust bypass duct 62. The second post-disaster smoke exhaust fan 61 is connected to the post-disaster smoke exhaust pipe 42 through the post-disaster smoke exhaust bypass duct 62, which is used to exhaust smoke from the equipment room 500. In addition, to enhance fire prevention capabilities, the equipment room 500 is equipped with a fire cabinet 501 containing fire cylinders, which allows for human intervention when the fire is small to prevent it from growing and reduce losses. The equipment room 500 is also equipped with a ladder entrance 502 leading to the ground, and a ladder 503 is installed inside the ladder entrance 502 to facilitate staff access to and from the equipment room 500.

[0057] On the other hand, an underground energy storage power station that utilizes the aforementioned underground energy storage power station's fresh air system is also provided. This underground energy storage power station avoids the prolonged operation of air conditioning equipment by using its fresh air system, thereby reducing power consumption, minimizing resource waste, and lowering costs.

[0058] And in this embodiment, such as Figure 1 As shown, the underground energy storage power station also includes a lighting system, which is connected to the BMS system for centralized control. In addition to standard lighting fixtures (7), the lighting system is equipped with emergency lights indicating safety exits, guiding personnel to evacuate safely in the event of a fire. Furthermore, to ensure warmth in winter and coolness in summer, the upper part of the energy storage power station is covered with soil insulation, and the surrounding area is also insulated. Anti-uplift piles are also installed to prevent floating. The foundation and basement walls are treated with anti-corrosion and waterproofing measures to ensure the overall sealing of the underground energy storage power station, allowing the fire suppression system to function effectively and reducing the harm to personnel and surrounding facilities in the event of a thermal runaway fire.

[0059] Optionally, such as Figure 1 , Figure 2 As shown, the underground energy storage power station also includes a fire suppression system, which includes a gas fire extinguisher 8. The gas fire extinguisher 8 is located on the top of the battery compartment 200 and is used to spray fire extinguishing gas into the battery compartment 200. By installing the gas fire extinguisher 8, the battery cluster 100 that has caught fire due to thermal runaway can be extinguished in a timely manner, preventing the fire from spreading and causing harm to other equipment and personnel.

[0060] In this embodiment, the gas fire extinguisher 8 can be installed not only at the top of the battery compartment 200, but also in other locations that are conducive to fire fighting; no specific limitations are imposed on this. To ensure the fire extinguishing effect of the gas fire extinguisher 8, it is assumed that the gas fire extinguisher 8 is an aerosol fire extinguisher or a heptafluoropropane fire extinguisher; further details will not be provided.

[0061] Optionally, the fire protection system also includes a liquid fire extinguisher, which is located at the top of the battery room 200 and is used to spray fire extinguishing liquid into the battery room 200. By using the liquid fire extinguisher in conjunction with the gas fire extinguisher 8, a dual fire extinguishing effect is achieved, increasing the speed of fire suppression.

[0062] Optionally, the fire protection system also includes a fire protection system control panel, which controls the start and stop of the gas fire extinguisher 8 and the liquid fire extinguisher. By using the fire protection system control panel to control the start and stop of the gas fire extinguisher 8 and the liquid fire extinguisher, the automation level of the fire protection system is improved.

[0063] In this embodiment, the fire control panel is also connected to the BMS system, sharing the temperature sensor and smoke detector. Based on the data from the temperature sensor and smoke detector, it selects whether to use a gas fire extinguisher 8, a liquid fire extinguisher, or both for fire suppression.

[0064] Optionally, such as Figure 3 As shown, the underground energy storage power station also includes a drainage system, which comprises a drainage ditch surrounding the battery room 200 and a water storage tank 9 connected to the drainage ditch. The drainage ditch is used to collect fire-fighting fluids into the water storage tank 9. The drainage system also includes a drainage pump, which is used to discharge the fire-fighting fluids from the water storage tank 9. By setting up the drainage ditch, residual fire-fighting water during fire suppression is collected in the water storage tank 9, so that the drainage pump can promptly discharge the fire-fighting water from the water storage tank 9.

[0065] In practical application, the aforementioned fresh air system, fire protection system, and drainage system of this underground energy storage power station are all controlled by the BMS control system. When the temperature sensor detects that the indoor temperature of the battery room 200 is higher than the outdoor temperature, the external circulation of the fresh air system is activated, exhaust fan 22 and supply fan 12 are started, the external circulation window is opened and the internal circulation window is closed to cool down the battery room 200. When the temperature inside the battery room 200 is within a controllable range, the fresh air system activates the internal circulation system, exhaust fan 22 and external circulation window are closed, and supply fan 12 and internal circulation window are opened, allowing the cool air inside the battery room 200 to circulate and maintain the temperature of the battery room 200. If the battery cluster 100 in the battery room 200 experiences thermal runaway and a fire occurs, if the fire is small, personnel can use the fire extinguishing gas cylinders in the equipment room 500 to extinguish and control the fire. In the event of a large fire, the BMS system uses temperature sensors and smoke detectors to control the gas and liquid fire extinguishers (8 and 12) for fire suppression. Simultaneously, it closes all exhaust fans (22), supply fans (12), internal ventilation windows (132), and external ventilation windows (131), and cuts power to related equipment in the battery room (200). Personnel evacuate according to the safety exit indicators on the emergency lights. Once the fire is extinguished, the first post-fire smoke exhaust fan (43) and the second post-fire smoke exhaust fan (61) activate, discharging smoke from the equipment room (500) and battery room (200) to the outside. The first post-fire blower (31) and the second post-fire blower (51) also activate to supply fresh air to the battery room (200) and equipment room (500). At the same time, the drainage pump is activated to drain the fire-fighting liquid collected in the water tank (9). This underground energy storage power station is well-sealed, and the fire suppression system functions effectively, posing minimal risk to personnel and surrounding facilities.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A fresh air system for an underground energy storage power station, characterized in that, The underground energy storage power station includes a battery room (200) for storing battery clusters (100) and related components, and the fresh air system of the underground energy storage power station includes: A fresh air supply assembly (1) includes an air outlet (11), a blower (12), and a fresh air duct (13). The air outlet (11) is located on the ground, and the fresh air duct (13) is connected to the air outlet (11). The fresh air duct (13) connects the air conditioning equipment and the battery room (200). The blower (12) is located on the side of the fresh air duct (13) near the air outlet (11). The fresh air duct (13) is provided with an external ventilation window (131) and an internal ventilation window (13). 2) The external ventilation window (131) is located inside the fresh air duct (13). The blower (12) delivers the cold air from the air conditioning equipment to the battery cluster (100) through the external ventilation window (131). The internal ventilation window (132) is located on the side wall of the fresh air duct (13). The blower (12) delivers the cold air from the battery room (200) back to the battery cluster (100) through the internal ventilation window (132). The opening and closing states of the external ventilation window (131) and the internal ventilation window (132) are opposite. The fresh air exhaust assembly (2) includes an exhaust port (21), an exhaust fan (22), and an exhaust duct (23). The exhaust port (21) is located on the ground. The exhaust duct (23) is connected to the exhaust port (21) and is connected to the outside and the battery room (200). The exhaust fan (22) is located at the exhaust port (21) and is used to exhaust the gas in the battery room (200). The fresh air supply assembly (1) also includes: A temperature sensor for detecting the temperature inside the battery compartment (200); Temperature control host, the temperature control host is used to control the opening and closing of the external ventilation window (131) and the internal ventilation window (132) and the start and stop of the exhaust fan (22) and the supply fan (12) according to the signal of the temperature sensor; When external circulation is in progress, the external ventilation window (131) is opened and the internal ventilation window (132) is closed. The blower (12) delivers the cold air from the air conditioning equipment to the battery cluster (100) through the air outlet (11), and works with the exhaust fan (22) to exhaust the high-temperature gas in the battery chamber (200) through the air outlet, thereby reducing the temperature in the battery chamber (200) as quickly as possible and ensuring that the temperature of the battery cluster (100) is controlled within a reasonable range. When the temperature of the battery cluster (100) is within the allowable range, the exhaust fan (22) and the external ventilation window (131) are closed, the internal ventilation window (132) is opened, and the blower (12) recirculates the cold air inside the battery chamber (200) to the battery cluster (100). The fresh air system of the underground energy storage power station also includes: The first post-disaster air supply assembly (3) includes a first post-disaster blower (31) and a first fresh air bypass duct (32). The first post-disaster blower (31) is connected to the fresh air duct (13) through the first fresh air bypass duct (32). The first post-disaster smoke exhaust assembly (4) includes a post-disaster smoke exhaust outlet (41), a post-disaster smoke exhaust pipe (42), and a first post-disaster smoke exhaust machine (43). The post-disaster smoke exhaust outlet (41) is located on the ground. The post-disaster smoke exhaust pipe (42) connects the smoke exhaust outlet and the battery room (200). The first post-disaster smoke exhaust machine (43) is used to exhaust the smoke in the battery room (200) to the outside through the post-disaster smoke exhaust pipe (42).

2. The fresh air system of the underground energy storage power station according to claim 1, characterized in that, The fresh air duct (13) is a trapezoidal duct that is wider at the front and narrower at the back.

3. The fresh air system of the underground energy storage power station according to claim 1, characterized in that, The first post-disaster smoke exhaust assembly (4) also includes: A smoke detector for detecting the smoke concentration in the battery compartment (200); The smoke control host is used to control the opening and closing of the post-disaster smoke exhaust port (41) and the start and stop of the first post-disaster smoke exhaust fan (43) according to the signal of the smoke detector.

4. An underground energy storage power station, wherein the underground energy storage power station includes a fresh air system as described in any one of claims 1-3.

5. The underground energy storage power station according to claim 4, characterized in that, The underground energy storage power station also includes a fire protection system, which includes a gas fire extinguisher (8) located on the top of the battery room (200). The gas fire extinguisher (8) is used to spray fire extinguishing gas into the battery room (200).

6. The underground energy storage power station according to claim 5, characterized in that, The fire protection system also includes a liquid fire extinguisher, which is located on the top of the battery room (200) and is used to spray fire extinguishing liquid into the battery room (200).

7. The underground energy storage power station according to claim 6, characterized in that, The fire protection system also includes a fire protection system host, which is used to control the start and stop of the gas fire extinguisher (8) and the liquid fire extinguisher.

8. The underground energy storage power station according to claim 6, characterized in that, The underground energy storage power station also includes a drainage system, which includes a drainage ditch surrounding the battery room (200) and a water storage tank (9) connected to the drainage ditch. The drainage ditch is used to collect the fire-fighting liquid into the water storage tank (9). The drainage system also includes a drainage pump, which is used to discharge the fire-fighting liquid from the water storage tank (9).

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