A cooling device for a station building type energy storage power station

Abstract

The utility model relates to a kind of station building type energy storage power plant cooling device, including battery cabinet, local centralized cooling cabinet, cooling unit, cooling tower, evaporator, condenser, compressor, expansion valve and underground heat exchange device;Local centralized cooling cabinet is responsible for the thermal management of battery pack in battery cabinet;Cooling unit is responsible for the centralized cooling of local centralized cooling cabinet;Cooling tower, evaporator, condenser, compressor, expansion valve and underground heat exchange device are responsible for the heat dissipation of cooling unit.The cooling device takes local centralized cooling cabinet as heat transfer hub, constructs the two-stage separation architecture of "in-station heat absorption-out-station heat rejection", first through the two-stage closed circulation heat exchange in station, completes the centralized handling of battery pack heat from in-station to out-station, so that in-station battery pack can always maintain suitable working temperature;Then, through the three kinds of heat dissipation structures set outside the station, the centralized heat rejection of out-station cooling unit is carried out, so as to ensure that the centralized cooling effect of local centralized cooling cabinet always meets the requirement of battery pack thermal management.

Description

Technical Field

[0001] This utility model relates to the field of cooling technology for energy storage power stations, and specifically to a station-type energy storage power station cooling device. Background Technology

[0002] Station-type energy storage power stations, primarily based on lithium-ion batteries, are gradually gaining attention. Compared to prefabricated modules, station-type stations concentrate batteries and converters within single- or multi-story buildings, saving over 30% of land and facilitating unified fire protection, power distribution, and operation and maintenance. However, they also bring new challenges such as high heat flux density per unit area, long heat dissipation paths, and the ease with which thermal runaway can spread.

[0003] Lithium-ion batteries use organic electrolytes, resulting in a high calorific value for the material system; large-capacity cells can generate 15-20 W·cell heat instantaneously during 1C charge / discharge. -1 For every 10°C increase in temperature, the cycle life decreases by approximately 50%, and a local temperature difference greater than 5°C can trigger a chain reaction of heat generation. GB / T 36276-2023 clearly requires that the operating temperature of energy storage batteries be 15-35°C and the temperature difference between individual cells be ≤3°C; otherwise, power reduction or shutdown is required. Therefore, high-precision, low-temperature difference cooling has become a core element in ensuring the safety of power stations and preserving and increasing the value of assets.

[0004] However, traditional cooling solutions all have many problems, as follows: (1) The whole station is air-cooled: the air conditioning has a small heat capacity and low heat exchange coefficient, and heat islands are easy to appear in the 2-3 m floor height and 0.3 m narrow passage. In order to eliminate local hot spots, excessive cooling is required, and the annual PUE is as high as 1.6-1.8, accounting for more than 15% of the station's electricity consumption.

[0005] (2) Prefabricated compartment liquid cooling: Although it solves the problem of battery-level heat dissipation, each compartment is equipped with an independent chiller unit, which has a large number of equipment and a large footprint. Furthermore, the cooling capacity between compartments cannot be mutually supported, resulting in low COP under partial load. At the same time, the external condensation side still relies on air cooling, which can easily cause high-pressure tripping in the summer.

[0006] (3) Single ground source or cooling tower scheme: Pure ground source system has high initial investment and large footprint; pure cooling tower system has high condensation temperature in summer and high risk of freezing in winter, making it difficult to balance energy efficiency and reliability throughout the year.

[0007] (4) Disorganized layout of heat dissipation equipment: Cooling towers, chillers and plate heat exchangers are scattered. Long-distance chilled water transportation leads to a temperature rise of 2-3℃, which increases pump power and reduces evaporation temperature, further deteriorating system energy efficiency.

[0008] (5) Risk of thermal runaway propagation: Existing solutions often involve installing a large number of condensers or air conditioning units inside the building. Once the battery experiences thermal runaway, the high-temperature flue gas and flammable refrigerant will coexist, which can easily lead to secondary disasters.

[0009] The industry is upgrading from "air cooling → single-compartment liquid cooling → station-level centralized liquid cooling". However, there is still a lack of mature solutions on how to achieve the unity of battery-level low temperature difference, station-level high energy efficiency, high system redundancy and minimal footprint within a station building; in particular, there is still a gap in the integrated technology of "zero heat dissipation equipment inside the building and multi-source complementarity outside the building" for station-type energy storage. Utility Model Content

[0010] To address the aforementioned issues, this utility model provides a station-type energy storage power station cooling device that retains only liquid cooling plates and compact on-site centralized cooling cabinets within the building, while moving all high-noise, high-heat-flux-density heat dissipation equipment outside the station. Through a three-source progression of "natural cooling tower - underground loop cooling - mechanical chiller unit," it achieves efficient heat dissipation and thermal runaway isolation in all climates, filling a technological gap in the field of station-type energy storage cooling.

[0011] The specific technical solution of this utility model is as follows: A station-type energy storage power station cooling device includes a battery cabinet, a local centralized cooling cabinet, a cooling unit, a cooling tower, an evaporator, a condenser, a compressor, an expansion valve, and an underground heat exchange device; the local centralized cooling cabinet is responsible for the thermal management of the battery packs in the battery cabinet; the cooling unit is responsible for the centralized cooling of the local centralized cooling cabinet; the cooling tower, evaporator, condenser, compressor, expansion valve, and underground heat exchange device are responsible for the heat dissipation of the cooling unit.

[0012] Furthermore, preferably, the battery cabinet and the local centralized cooling cabinet are arranged inside the building, while the cooling unit, cooling tower, evaporator, condenser, compressor, expansion valve and underground heat exchange device are arranged outside the building.

[0013] Furthermore, preferably, the battery cabinets are arranged in multiple rows within the building, and each battery cabinet has a liquid cooling plate installed on the bottom or side of the battery pack. The inlets and outlets of all liquid cooling plates are connected to the same inlet and outlet main pipes, forming an independent heat exchange unit within the cabinet. The local centralized cooling cabinet is arranged adjacent to the battery cabinets. A single local centralized cooling cabinet is connected to the inlet and outlet main pipes of several battery cabinets in a closed loop through a first pipeline. Cooling medium a is introduced into the first pipeline, and the thermal management of the battery pack is achieved through the circulation of cooling medium a between the liquid cooling plate and the local centralized cooling cabinet.

[0014] Furthermore, preferably, the cooling unit is connected to several local centralized cooling cabinets through a second pipeline, and a cooling medium b is introduced into the second pipeline. The cooling medium b releases heat and cools down in the evaporator built into the cooling unit, thereby achieving centralized cooling of all local centralized cooling cabinets.

[0015] Furthermore, preferably, the local centralized cooling cabinet integrates a heat exchanger, which is a plate heat exchanger, with cooling medium a flowing on the primary side and cooling medium b flowing on the secondary side.

[0016] Furthermore, preferably, the heat dissipation side of the cooling unit is connected to the cooling tower via a fourth pipe, through which a cooling medium d is introduced. The heat of the cooling medium d is carried away by the fan of the cooling tower, thus completing the heat dissipation of the cooling unit.

[0017] Furthermore, preferably, the heat dissipation side of the cooling unit is connected to the evaporator via a third pipe. The evaporator, condenser, compressor, and expansion valve are sequentially connected via refrigerant copper pipes to form an independent refrigeration loop. The condenser is connected to an underground heat exchange device via a fifth pipe. The underground heat exchange device is installed vertically to the ground. Cooling medium c is introduced into the third pipe, and cooling medium e is introduced into the fifth pipe. Through the cyclical operation of the refrigeration loop, the heat of the cooling unit is transferred to the underground heat exchange device and released into the ground by the underground heat exchange device, thus completing the heat dissipation of the cooling unit.

[0018] Furthermore, preferably, the cooling unit has a built-in compression refrigeration system that directly cools the cooling medium b to achieve heat dissipation.

[0019] Furthermore, preferably, the cooling medium a is deionized water or a water-based solution; and the cooling medium b is water.

[0020] Furthermore, preferably, the cooling medium c, cooling medium d, and cooling medium e are all pure water.

[0021] The beneficial effects of this utility model are as follows: This cooling device uses a "local centralized cooling cabinet" as a heat transfer hub, constructing a two-stage separation architecture of "heat absorption inside the station and heat exhaust outside the station". Only liquid cooling plates and compact local centralized cooling cabinets are retained inside the building, while all high-noise and high-heat-flux-density heat dissipation equipment is moved outside the station, achieving "zero heat dissipation equipment inside the station and centralized heat exhaust outside the station". Then, through two-stage closed-loop heat exchange inside the station (via liquid cooling plate → cooling medium a → local centralized cooling cabinet → cooling medium b → cooling unit), the heat of the battery pack is centrally transported from "inside the station" to "outside the station", ensuring that the battery pack inside the station can always maintain a suitable operating temperature. Then, through three heat dissipation structures set outside the station: "natural cooling tower, underground loop cooling, and mechanical chiller unit cooling", the heat of the external cooling unit is centrally exhausted, thereby ensuring that the centralized cooling effect of the local centralized cooling cabinet always meets the thermal management requirements of the battery pack, completely eliminating the thermal runaway propagation path, and providing efficient cooling guarantee for 100-megawatt station-type energy storage power stations under all operating conditions and throughout their entire life cycle. In particular, the three heat dissipation structures can be flexibly selected and intelligently stacked, allowing for a progressive heat dissipation of the cooling unit in a "natural first, then ground source, then mechanical" mode according to the ambient temperature and battery load. It also has the advantages of high safety, high energy efficiency, and high expansion flexibility, providing strong protection for the cooling system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a station-type energy storage power station cooling device according to the present invention; In the diagram: 1-Battery cabinet, 2-Local central cooling cabinet, 3-Cooling unit, 4-Cooling tower, 5-Evaporator, 6-Condenser, 7-Compressor, 8-Expansion valve, 9-Underground heat exchange device, 10-First pipeline, 11-Second pipeline, 12-Third pipeline, 13-Fourth pipeline, 14-Fifth pipeline, 15-Heat exchanger. Detailed Implementation

[0023] To make the technical problems and solutions solved by this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 this utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figure 1 As shown, a station-type energy storage power station cooling device includes a battery cabinet 1, a local centralized cooling cabinet 2, a cooling unit 3, a cooling tower 4, an evaporator 5, a condenser 6, a compressor 7, an expansion valve 8, and an underground heat exchange device 9. The battery cabinet 1 and the local centralized cooling cabinet 2 are located inside the building, while the cooling unit 3, cooling tower 4, evaporator 5, condenser 6, compressor 7, expansion valve 8, and underground heat exchange device 9 are located outside the building. The local centralized cooling cabinet 2 is responsible for the thermal management of the battery packs inside the battery cabinet 1; the cooling unit 3 is responsible for the centralized cooling of the local centralized cooling cabinet 2; and the cooling tower 4, evaporator 5, condenser 6, compressor 7, expansion valve 8, and underground heat exchange device 9 are responsible for the heat dissipation of the cooling unit 3, thus forming a "heat absorption inside the station - heat exhaust outside the station" cooling system.

[0027] The battery cabinets 1 are arranged in multiple rows inside the building, and each battery pack in the cabinet 1 is equipped with a liquid cooling plate on the bottom or side. The liquid cooling plate is an aluminum alloy brazed plate with parallel microchannels inside. All the liquid cooling plates are connected to the same inlet and outlet main pipes through stainless steel hoses inside the cabinet, forming an independent heat exchange unit inside the cabinet.

[0028] The local centralized cooling cabinet 2 is arranged adjacent to the battery cabinet 1. Each local centralized cooling cabinet 2 integrates a heat exchanger 15, a variable frequency circulating pump, a filter, a water replenishment and pressure stabilization device, and an online temperature / pressure / conductivity monitoring module. The primary side of the heat exchanger 15 carries cooling medium a, and the secondary side carries cooling medium b. A single local centralized cooling cabinet 2 is connected to the inlet and outlet main pipes of all liquid cooling plates in several battery cabinets 1 through a first pipeline 10 to form a closed loop. Cooling medium a is introduced into the first pipeline 10. Through the circulation of cooling medium a between the liquid cooling plates and the local centralized cooling cabinet 2, the heat generated by the battery pack is absorbed and carried away, maintaining the average cell temperature at 25 ℃ ± 2 ℃ and the individual cell temperature difference ≤ 3 ℃, thereby completing the thermal management of several battery cabinets 1 connected to the local centralized cooling cabinet 2. Among them, heat exchanger 15 adopts plate heat exchanger; cooling medium a can be deionized water or water-based solution; there are multiple local centralized cooling cabinets 2, and the specific number can be reasonably set according to the number of battery cabinets 1 to meet the heat exchange needs of all battery cabinets 1 in the station building.

[0029] The cooling unit 3 is connected to several local centralized cooling cabinets 2 through the second pipeline 11. Cooling medium b (pure water) is introduced into the second pipeline 11. After the cooling medium b releases heat and cools down in the evaporator built into the cooling unit 3, it returns to the secondary side of the heat exchanger 15 of the local centralized cooling cabinet 2 to form a "medium temperature loop" and realize centralized cooling of all local centralized cooling cabinets 2.

[0030] The cooling unit 3 has three heat dissipation structures and paths on its heat dissipation side, corresponding to three cooling methods, with the following priority from low to high: The first method: natural cooling from a cooling tower. The heat dissipation side of cooling unit 3 is connected to cooling tower 4 via a fourth pipe 13, through which cooling medium d (pure water) flows. During cooling, the cooling tower's fan is activated, allowing outside air to directly contact the cooling medium d circulating between cooling unit 3 and cooling tower 4, resulting in evaporative heat dissipation. This natural cooling method primarily utilizes the external environment; although it consumes the least energy, its cooling capacity rapidly decreases as the ambient temperature rises.

[0031] The second type: underground loop cooling The heat dissipation side of cooling unit 3 is connected to evaporator 5 via third pipe 12. Evaporator 5, condenser 6, compressor 7, and expansion valve 8 are connected sequentially via refrigerant copper pipes, forming an independent refrigeration loop. Simultaneously, condenser 6 is connected to underground heat exchange device 9 via fifth pipe 14, which is installed vertically to the ground. Cooling medium c (pure water) flows through third pipe 12, and cooling medium e (pure water) flows through fifth pipe 14.

[0032] During cooling, the cooling medium c absorbs heat from the cooling unit 3 in the evaporator 5, causing the refrigerant to evaporate from a low-temperature, low-pressure liquid state to a high-temperature, low-pressure gas state. After being pressurized by the compressor 7, it enters the condenser 6, where it releases heat to the cooling medium e, becoming a normal-temperature, high-pressure liquid state. After being throttled by the expansion valve 8, it returns to the evaporator 5, completing the refrigeration cycle. The heated cooling medium e enters the underground heat exchange device 9 through the fifth pipe 14, flowing downwards in a turbulent state within the U-shaped tube of the underground heat exchange device 9. It conducts heat through the pipe wall and the surrounding soil, releasing the condensation heat it carries into the ground, thus achieving heat removal. The cooled medium e, after releasing heat, returns to the condenser 6 along the fifth pipe 14, absorbing the refrigerant's condensation heat again, forming a continuous closed-loop cycle. This mode utilizes the constant temperature characteristics of the soil throughout the year, resulting in high heat exchange efficiency and providing an additional cooling margin of 5℃ to 8℃.

[0033] The third type: cooling by mechanical chiller units With the built-in compression refrigeration system of cooling unit 3, the mechanical chiller automatically starts when the battery load suddenly increases, directly cooling the cooling medium b to ensure that the outlet temperature of battery cabinet 1 can still be controlled below 28°C under extreme operating conditions. This mechanical cooling method mainly ensures that the energy storage battery system can still meet the operating environment temperature requirements under maximum heat dissipation conditions by configuring a chiller unit with sufficient capacity.

[0034] The three cooling methods mentioned above can be operated individually or stacked in stages. The control logic is uniformly scheduled by the built-in PLC of the cooling unit 3: During normal operation, the first cooling method is used first; when the temperature inside the battery cabinet exceeds the set upper limit, the second cooling method is started; when the second cooling method still cannot meet the set requirements, the third cooling method is started.

[0035] Working principle: The cooling task of the station-type energy storage power station is completed by a two-stage loop: "internal heat exchange - external heat exhaust". The internal loop is the circulation between the battery liquid cooling plate and the local centralized cooling cabinet 2. The liquid cooling plate in each battery cabinet 1 is in close contact with the battery cell. The heat generated by charging and discharging is first transferred to the cooling medium a. Driven by the variable frequency circulating pump, the cooling medium a enters the primary side of the plate heat exchanger 15 of the local centralized cooling cabinet 2 along the first pipeline 10, exchanges heat with the cooling medium b on the secondary side, and returns to the battery cabinet 1 after cooling down, forming a "low temperature loop" on the battery side, maintaining the average cell temperature of 25 ℃±2 ℃ and the temperature difference between individual cells ≤3 ℃.

[0036] The outer zone is a "medium-temperature circuit" and a multi-stage heat dissipation cycle: the cooling medium b after absorbing heat is sent to the evaporator built into the cooling unit 3 through the second pipeline 11, and after releasing heat and cooling down, it returns to the local centralized cooling cabinet 2 to complete the transfer of heat from "station" to "unit".

[0037] The heat dissipation side of cooling unit 3 can select any one of the following three heat dissipation modes based on the measured outlet temperature T_b,out of the cooling medium b, or automatically superimpose them according to the priority order of "natural cooling tower cooling - underground loop cooling - mechanical chiller unit cooling" to achieve efficient heat dissipation and energy-saving operation throughout the year. The working process of superimposing the three heat dissipation modes is described in detail below: ① Cooling tower natural cooling mode When the outdoor wet-bulb temperature is low and T_b,out is below the set upper limit (i.e. ≤28 ℃), the cooling unit 3 only starts in mode ①: the cooling medium d circulates in a closed loop between the cooling tower 4 and the evaporator built into the cooling unit 3, and the air directly contacts the cooling medium d to evaporate and remove heat.

[0038] ② Underground loop cooling mode When the battery load increases or the ambient temperature rises, causing T_b,out to exceed the set upper limit (i.e., >28 ℃), the cooling unit 3 automatically enters mode ②: the evaporator 5, compressor 7, condenser 6, and expansion valve 8 form a refrigeration loop. The refrigerant absorbs heat from the cooling medium c in the evaporator 5 and evaporates. After being compressed, it enters the condenser 6 and releases heat to the cooling medium e for condensation. The cooling medium e flows along the fifth pipeline 14 into the underground heat exchange device 9, introducing the condensation heat into the soil. The released cooling medium e returns to the condenser 6 and absorbs the refrigerant condensation heat again, forming a closed-loop ground source cycle.

[0039] ③Mechanical chiller unit cooling mode If modes ①+② still cannot suppress the temperature rise, and T_b,out remains higher than the set upper limit (i.e., >28 ℃), or the battery cabinet outlet temperature exceeds 28 ℃, cooling unit 3 immediately adds mode ③: directly cooling the cooling medium b through the built-in compression refrigeration system to ensure that the battery cabinet return liquid temperature can still be controlled at the target value under extreme operating conditions. At this time, the three heat dissipation paths operate simultaneously, the system cooling capacity redundancy is ≥20%, and a "power limit operation" warning signal is sent to the host computer to prevent thermal runaway.

[0040] Control and switching logic: The built-in PLC of cooling unit 3 monitors T_b,out, battery cabinet outlet temperature and outdoor wet-bulb temperature in real time, and switches seamlessly according to the step strategy of "low-power first, then ground source, then mechanical". According to the annual operation statistics, natural cooling and ground source heat dissipation account for ≥80% of the heat dissipation, while mechanical cooling accounts for <20%. The overall PUE of the station is ≤1.08, which significantly reduces energy consumption and operating costs while ensuring constant battery temperature operation.

[0041] The present invention has been described in detail above through specific and preferred embodiments. However, those skilled in the art should understand that the present invention is not limited to the embodiments described above. Any modifications or equivalent substitutions made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cooling device for a station-type energy storage power station, characterized in that: It includes a battery cabinet (1), a local centralized cooling cabinet (2), a cooling unit (3), a cooling tower (4), an evaporator (5), a condenser (6), a compressor (7), an expansion valve (8), and an underground heat exchange device (9); the local centralized cooling cabinet (2) is responsible for the thermal management of the battery pack in the battery cabinet (1); the cooling unit (3) is responsible for the centralized cooling of the local centralized cooling cabinet (2); the cooling tower (4), evaporator (5), condenser (6), compressor (7), expansion valve (8), and underground heat exchange device (9) are responsible for the heat dissipation of the cooling unit (3).

2. The station-type energy storage power station cooling device according to claim 1, characterized in that: The battery cabinet (1) and the local centralized cooling cabinet (2) are located inside the building, while the cooling unit (3), cooling tower (4), evaporator (5), condenser (6), compressor (7), expansion valve (8) and underground heat exchange device (9) are located outside the building.

3. A station-type energy storage power station cooling device according to claim 1 or 2, characterized in that: The battery cabinets (1) are arranged in multiple rows in the building, and each battery cabinet (1) is equipped with a liquid cooling plate on the bottom or side of the battery pack. The inlet and outlet of all liquid cooling plates are connected to the same inlet main pipe and outlet main pipe to form an independent heat exchange unit in the cabinet. The local centralized cooling cabinet (2) is arranged next to the battery cabinet (1). A single local centralized cooling cabinet (2) is connected to the inlet main pipe and outlet main pipe of several battery cabinets (1) through the first pipeline (10) to form a closed loop. Cooling medium a is introduced into the first pipeline (10). The battery pack is thermally managed by circulating the cooling medium a between the liquid cooling plate and the local centralized cooling cabinet (2).

4. The station-type energy storage power station cooling device according to claim 3, characterized in that: The cooling unit (3) is connected to several local centralized cooling cabinets (2) through a second pipeline (11). Cooling medium b is introduced into the second pipeline (11). The cooling medium b releases heat and cools down in the evaporator built into the cooling unit (3), thereby achieving centralized cooling of all local centralized cooling cabinets (2).

5. A station-type energy storage power station cooling device according to claim 4, characterized in that: The local centralized cooling cabinet (2) integrates a heat exchanger (15), which is a plate heat exchanger with cooling medium a flowing on the primary side and cooling medium b flowing on the secondary side.

6. The station-type energy storage power station cooling device according to claim 4, characterized in that: The heat dissipation side of the cooling unit (3) is connected to the cooling tower (4) through the fourth pipe (13). Cooling medium d is introduced into the fourth pipe (13), and the heat of cooling medium d is carried away by the fan of the cooling tower (4) to complete the heat dissipation of the cooling unit (3).

7. A station-type energy storage power station cooling device according to claim 4 or 6, characterized in that: The heat dissipation side of the cooling unit (3) is connected to the evaporator (5) through the third pipe (12). The evaporator (5), condenser (6), compressor (7), and expansion valve (8) are connected in sequence through refrigerant copper pipes to form an independent refrigeration loop. The condenser (6) is connected to the underground heat exchange device (9) through the fifth pipe (14). The underground heat exchange device (9) is set vertically to the ground. Cooling medium c is introduced into the third pipe (12), and cooling medium e is introduced into the fifth pipe (14). The heat of the cooling unit (3) is transferred to the underground heat exchange device (9) through the cyclic operation of the refrigeration loop, and then released to the ground by the underground heat exchange device (9), thus completing the heat dissipation of the cooling unit (3).

8. A station-type energy storage power station cooling device according to claim 7, characterized in that: The cooling unit (3) has a built-in compression refrigeration system, which directly cools the cooling medium b to complete the heat dissipation of the cooling unit (3).

9. A station-type energy storage power station cooling device according to claim 5, characterized in that: The cooling medium a is deionized water or a water-based solution; the cooling medium b is pure water.

10. A station-type energy storage power station cooling device according to claim 7, characterized in that: The cooling medium c, cooling medium d, and cooling medium e are all pure water.

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