Energy-saving cooling system and energy storage power station

Abstract

The utility model provides an energy-saving cooling system and an energy storage power station. The energy-saving cooling system comprises a liquid cooling unit for cooling a battery module, a cold storage unit, a liquid cooling heat exchange unit arranged in the cold storage unit, a cooling-water machine for refrigerating the cold storage unit, and an air cooling heat exchange unit, the cooling-water machine and the air-cooling heat exchange unit are configured to be capable of running simultaneously or switching to run, and at least comprise the following two working conditions: working condition I, the liquid-cooling heat exchange unit, the air-cooling heat exchange unit and the liquid-cooling unit are connected in series to form a closed liquid-cooling circulation loop; and in the second working condition, the liquid cooling heat exchange unit or the air cooling heat exchange unit is connected with the liquid cooling unit in series to form a closed liquid cooling circulation loop. According to the energy-saving cooling system and the energy storage power station, the energy-saving effect of the energy-saving cooling system and the energy storage power station is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of cooling systems for energy storage equipment, and in particular to an energy-saving cooling system and an energy storage power station. Background Technology

[0002] Energy storage power stations are facilities that store electrical energy and release it when needed, playing a crucial role in improving the stability of power systems and regulating peak and off-peak loads. Battery energy storage is the most common type of energy storage power station. Batteries generate a significant amount of heat during charging and discharging. If this heat is not effectively managed, it can lead to overheating of the energy storage system, affecting its efficiency and shortening its lifespan. Therefore, thermal management of energy storage systems is essential.

[0003] There are two main cooling methods for battery energy storage power stations: air cooling and liquid cooling. Air cooling systems rely on airflow to remove heat, primarily using air conditioners or fans to dissipate heat from the internal space of the energy storage device as a whole. The advantages of this system are its simplicity, lack of need for additional liquid media, lower manufacturing and operating costs, and energy efficiency. However, air cooling is easily affected by ambient temperature, and in high-power-density applications, traditional air cooling is no longer entirely suitable for such high-heat equipment.

[0004] Liquid cooling systems use a flowing liquid medium (such as water or coolant) to absorb and transfer heat. A liquid cooling system uses a liquid cooling plate in direct contact with the surface of the battery module to exchange heat with the high-temperature battery module, thereby effectively reducing the battery module's temperature. Therefore, compared to traditional air-cooled systems, liquid cooling systems can handle higher power density applications and provide better temperature control. However, liquid cooling systems have higher operating costs.

[0005] Currently, energy storage power stations mainly use energy storage containers for energy storage. Due to limitations in space and load-bearing capacity, their cooling systems primarily employ compact liquid chillers designed for 365-day uninterrupted operation. Although compact liquid chillers are widely used, they still have drawbacks such as insufficient utilization of environmental cooling sources and high energy consumption.

[0006] It should be noted that the above description of the background technology is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background technology section of this application. Utility Model Content

[0007] The purpose of this utility model is to disclose an energy-saving cooling system and energy storage power station, which is used to solve many defects in the existing cooling system, especially to improve the energy-saving effect of the energy-saving cooling system and energy storage power station.

[0008] To achieve the above objectives, in a first aspect, this utility model provides an energy-saving cooling system, comprising: a liquid cooling unit for cooling a battery module, a cold storage unit, a liquid cooling heat exchange unit disposed within the cold storage unit, a chiller for cooling the cold storage unit, and an air-cooled heat exchange unit.

[0009] The chiller and the air-cooled heat exchange unit are configured to operate simultaneously or switch between operations, and include at least the following two operating conditions:

[0010] In operating condition one, the liquid-cooled heat exchange unit, the air-cooled heat exchange unit and the liquid-cooled unit are connected in series to form a closed liquid-cooled circulation loop;

[0011] In the second operating condition, the liquid-cooled heat exchange unit or the air-cooled heat exchange unit is connected in series with the liquid-cooled unit to form a closed liquid-cooled circulation loop.

[0012] As a further improvement of this utility model, the inlet of the air-cooled heat exchange unit is configured with a first inlet pipe, which is connected to the return pipe included in the liquid-cooled unit; the inlet of the liquid-cooled heat exchange unit is configured with a second inlet pipe; the outlet of the air-cooled heat exchange unit is configured with a first outlet pipe connected to the second inlet pipe; and the outlet of the liquid-cooled heat exchange unit is configured with a third outlet pipe, which is connected to the supply pipe included in the liquid-cooled unit, to form a first liquid-cooled circulation loop.

[0013] As a further improvement of this utility model, the air-cooled heat exchange unit is configured with a second liquid outlet pipe connecting the first liquid outlet pipe and the liquid supply pipe, and the cooling system further includes: a second valve body configured in the first liquid outlet pipe and a second circulation pump configured in the first liquid inlet pipe to form a second liquid cooling circulation loop;

[0014] The cooling system further includes: a sixth valve body disposed on the second liquid outlet pipe, a second through pipe connecting the second liquid inlet pipe and the liquid return pipe, and a first circulation pump disposed on the second liquid inlet pipe to form a third liquid cooling circulation loop;

[0015] The cooling system further includes: a fourth valve body disposed on the return pipe, a fifth valve body disposed on the supply pipe, and a first through pipe connecting the first inlet pipe and the third outlet pipe to form a cooling circulation loop.

[0016] As a further improvement of this utility model, the cooling system further includes an expansion tank, which is connected to the return pipe and the supply pipe.

[0017] As a further improvement of this utility model, the cooling system further includes: a plurality of cold storage units, the plurality of cold storage units being interconnected and at least one liquid-cooled heat exchange unit being configured thereon, and an air-cooled heat exchange unit being configured to match the liquid-cooled heat exchange unit.

[0018] As a further improvement of this utility model, the cooling system further includes: a plurality of the cold storage units, each of the cold storage units being independently configured with a liquid cooling heat exchange unit, and an air cooling heat exchange unit matched with the liquid cooling heat exchange unit.

[0019] Secondly, the present invention also provides an energy storage power station, comprising: an energy storage compartment for accommodating battery modules, and an energy-saving cooling system as described in any one of the first aspects for cooling the battery modules.

[0020] As a further improvement of this utility model, the energy storage power station further includes: a ground, and the energy storage compartment is disposed on the ground;

[0021] The cold storage unit is configured as a water tank located below the ground level, the water tank contains coolant, and the liquid-cooled heat exchange unit is immersed in the coolant in the water tank;

[0022] The energy storage chamber, the water storage tank, and the floor are all made of concrete composite material.

[0023] As a further improvement of this utility model, the energy storage power station includes multiple energy storage compartments;

[0024] The cooling system includes the same number of cold storage units as the energy storage compartment, multiple cold storage units are interconnected and at least one liquid-cooled heat exchange unit is configured thereon, and an air-cooled heat exchange unit is configured to match the liquid-cooled heat exchange unit.

[0025] As a further improvement of this utility model, the energy storage power station includes multiple energy storage compartments;

[0026] The energy-saving cooling system includes the same number of cold storage units as the energy storage compartment, each cold storage unit is independently configured with a liquid-cooled heat exchange unit, and an air-cooled heat exchange unit matched with the liquid-cooled heat exchange unit.

[0027] Compared with existing technologies, the beneficial effects of this invention are as follows: The energy-saving cooling system can flexibly switch operating modes according to ambient temperature and cooling requirements, prioritizing the most energy-efficient cooling method (cold storage unit or air-cooled heat exchange unit), significantly reducing the energy consumption of the energy-saving cooling system. When the battery module temperature is high and the ambient temperature is low, the circulating fluid flows in a closed liquid-cooled circulation loop formed by the liquid cooling unit and the air-cooled heat exchange unit connected in series. The air-cooled heat exchange unit uses ambient air to cool the circulating fluid, eliminating the need to start the chiller and reducing energy consumption. When the ambient temperature is low, the energy-saving cooling system prioritizes the use of ambient cold sources, fully utilizing the cooling capacity of the air-cooled heat exchange unit to improve energy efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall energy-saving cooling system disclosed in this utility model;

[0029] Figure 2 This is an overall schematic diagram of an energy-saving cooling system in another embodiment;

[0030] Figure 3 This is an overall schematic diagram of an energy-saving cooling system in another embodiment;

[0031] Figure 4 This is an overall schematic diagram of an energy-saving cooling system in another embodiment;

[0032] Figure 5 This is an overall schematic diagram of the energy storage power station including an energy-saving cooling system disclosed in this utility model. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0034] The accompanying drawings in this invention are not strictly drawn to scale, and the specific dimensions of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0035] Please refer to Figures 1 to 5 A specific implementation of an energy-saving cooling system 100 (hereinafter referred to as "cooling system 100") and an energy storage power station 1000 is disclosed.

[0036] In this embodiment, the cooling system 100 includes: a liquid cooling unit 10 for cooling the battery module 200, a cold storage unit 20, a liquid cooling heat exchange unit 30 disposed in the cold storage unit 20, a chiller 40 for cooling the cold storage unit 20, and an air-cooled heat exchange unit 50; the chiller 40 and the air-cooled heat exchange unit 50 are configured to operate simultaneously or switch between operations, and include at least the following two operating conditions: Operating condition one, the liquid cooling heat exchange unit 30, the air-cooled heat exchange unit 50 and the liquid cooling unit 10 are connected in series to form a closed liquid cooling loop; Operating condition two, the liquid cooling heat exchange unit 30 or the air-cooled heat exchange unit 50 is connected in series with the liquid cooling unit 10 to form a closed liquid cooling loop.

[0037] The cooling system 100 disclosed in this application absorbs heat generated by the battery module 200 through a liquid cooling unit 10, and cools the circulating liquid that has absorbed heat from the battery module 200 through an air-cooled heat exchange unit 50 and / or a liquid-cooled heat exchange unit 30. A chiller 40 cools the cold storage unit 20, or a combination of the air-cooled heat exchange unit 50 and the liquid-cooled heat exchange unit 30 cools the cold storage unit 20, so that the cold storage unit 20 stores cooling energy and ensures that the coolant within the cold storage unit 20 has sufficient cooling capacity. The liquid-cooled heat exchange unit 30, as a heat exchange medium, can transfer heat from the circulating liquid to the coolant within the cold storage unit 20. The cold storage unit 20 and the liquid-cooled heat exchange unit 30 work together so that the circulating liquid that has absorbed heat from the battery module 200 flows to the liquid-cooled heat exchange unit 30 and exchanges heat with the coolant within the cold storage unit 20 to reduce the temperature of the circulating liquid.

[0038] Example 1, reference Figure 1 As shown, when the battery module 200 temperature is high (e.g., battery module 200 temperature ≥ 30°C), and the ambient temperature of the air-cooled heat exchange unit 50 is ≤ the temperature of the circulating fluid after the liquid cooling unit 10 cools the battery module 200 (e.g., 6°C), the cooling system 100 switches to operating condition one. The circulating fluid that has absorbed the heat generated by the battery module 200 flows from the liquid cooling unit 10 to the air-cooled heat exchange unit 50, where it undergoes its first cooling process. After being cooled by unit 50, the circulating liquid flows from the air-cooled heat exchange unit 50 to the liquid-cooled heat exchange unit 30. The liquid-cooled heat exchange unit 30, together with the coolant in the cold storage unit 20, performs heat exchange on the circulating liquid to perform a second cooling. The circulating liquid after the second cooling returns to the liquid-cooled unit 10. The circulating liquid circulates in the closed liquid-cooled circulation loop formed by the liquid-cooled unit 10, the air-cooled heat exchange unit 50 and the liquid-cooled heat exchange unit 30 connected in series to cool down the battery module 200.

[0039] When the battery module 200 has a high temperature and the ambient temperature is low, the cooling system 100 employs a two-stage cooling mode with an air-cooled heat exchange unit 50 and a liquid-cooled heat exchange unit 30 connected in series. The air-cooled heat exchange unit 50 utilizes ambient air for the first cooling of the circulating liquid, and then the liquid-cooled heat exchange unit 30 performs a second cooling of the circulating liquid, achieving efficient cooling of the circulating liquid. Through the efficient utilization of the ambient cold source by the air-cooled heat exchange unit 50, the cooling system 100 does not require the high-energy-consuming chiller 40 to be started in low-temperature environments, reducing the load and operating frequency of the chiller 40, lowering the power consumption of the cooling system 100, and improving energy efficiency.

[0040] Example 2, reference Figure 3 As shown, when the battery module 200 temperature is high (e.g., battery module 200 temperature ≥ 30°C) and the ambient temperature of the air-cooled heat exchange unit 50 is ≥ the temperature of the coolant in the cold storage unit 20, the cooling system 100 switches to operating condition two. The circulating liquid that has absorbed the heat generated by the battery module 200 flows from the liquid cooling unit 10 to the liquid cooling heat exchange unit 30. The liquid cooling heat exchange unit 30, together with the coolant in the cold storage unit 20, performs heat exchange on the circulating liquid to cool it. The cooled circulating liquid returns to the liquid cooling unit 10. The circulating liquid circulates in the closed liquid cooling loop formed by the liquid cooling unit 10 and the liquid cooling heat exchange unit 30 connected in series to cool and reduce the temperature of the battery module 200.

[0041] When the temperature of the battery module 200 is high compared to the ambient temperature, the circulating fluid flows in a closed liquid-cooled circulation loop formed by the liquid cooling unit 10 and the liquid cooling heat exchange unit 30 connected in series. Heat exchange occurs between the circulating fluid and the coolant in the cold storage unit 20 via the liquid cooling heat exchange unit 30, rapidly reducing the circulating fluid temperature and thus cooling the battery module 200. Due to the high ambient temperature, the cooling efficiency of the air-cooled heat exchange unit 50 is low. Therefore, the cooling system 100 prioritizes utilizing the cooling capacity of the cold storage unit 20, avoiding inefficient operation of the air-cooled heat exchange unit 50 and reducing energy consumption.

[0042] Example 3, reference Figure 2 As shown, when the battery module 200 temperature is high (e.g., battery module 200 temperature ≥ 30°C) and the ambient temperature of the air-cooled heat exchange unit 50 is ≤ the temperature of the circulating liquid after the liquid cooling unit 10 cools the battery module 200 (e.g., 6°C), the cooling system 100 switches to operating condition two. The circulating liquid that has absorbed the heat generated by the battery module 200 flows from the liquid cooling unit 10 to the air-cooled heat exchange unit 50. The air-cooled heat exchange unit 50 cools the circulating liquid. The cooled circulating liquid returns to the liquid cooling unit 10. The circulating liquid circulates in the closed liquid cooling loop formed by the liquid cooling unit 10 and the air-cooled heat exchange unit 50 connected in series to cool the battery module 200.

[0043] When the battery module 200 is at a high temperature and the ambient temperature is low, the circulating fluid flows in a closed liquid-cooled circulation loop formed by the liquid cooling unit 10 and the air-cooled heat exchange unit 50 connected in series. The air-cooled heat exchange unit 50 uses ambient air to cool the circulating fluid, eliminating the need to start the chiller 40 and reducing energy consumption. When the ambient temperature is low, the cooling system 100 prioritizes the use of ambient cold sources, fully utilizing the cooling capacity of the air-cooled heat exchange unit 50 to improve energy efficiency.

[0044] Based on ambient temperature and cooling requirements, the cooling system 100 can flexibly switch operating modes, prioritizing the most energy-efficient cooling method (cold storage unit 20 or air-cooled heat exchange unit 50), significantly reducing the energy consumption of the cooling system 100. The cooling system 100 can automatically adjust its operating mode according to ambient temperature and cooling requirements, ensuring efficient cooling of the battery module 200 under different conditions. By reducing the operating time and energy consumption of the chiller 40, the cooling system 100 significantly reduces power consumption and operating costs while maintaining cooling effectiveness.

[0045] In some examples, the cooling system 100 employs ice storage technology, operating a chiller 40 during off-peak electricity hours at night. The chiller 40 converts electrical energy into cooling energy during these hours and stores this energy in a coolant storage unit 20. During peak daytime electricity hours or when cooling demand is high, the storage unit 20 releases the stored cooling energy to cool the battery module 200. By utilizing off-peak electricity prices for ice production, the cooling system 100 reduces electricity consumption during peak daytime hours, significantly lowering electricity costs.

[0046] When the ambient temperature is high or the cooling demand is high, the cold energy stored in the cold storage unit 20 serves as a backup cold source. It exchanges heat with the circulating liquid through the liquid-cooled heat exchange unit 30, reducing the temperature of the circulating liquid. Alternatively, the cold energy stored in the cold storage unit 20 works in conjunction with the air-cooled heat exchange unit 50 and the liquid-cooled heat exchange unit 30 to quickly reduce the temperature of the battery module 200, improving overall cooling efficiency. By utilizing the stored cold energy, the operating time of the chiller 40 during peak hours is reduced, thus lowering energy consumption.

[0047] In some examples, the parameter Figure 1As shown, the inlet of the air-cooled heat exchange unit 50 is equipped with a first inlet pipe 51, which is connected to the return pipe 12 included in the liquid-cooled unit 10. The inlet of the liquid-cooled heat exchange unit 30 is equipped with a second inlet pipe 31. The outlet of the air-cooled heat exchange unit 50 is equipped with a first outlet pipe 52 connected to the second inlet pipe 31. The outlet of the liquid-cooled heat exchange unit 30 is equipped with a third outlet pipe 32, which is connected to the supply pipe 11 included in the liquid-cooled unit 10, to form a first liquid-cooled circulation loop. When the battery module 200 temperature is high (e.g., battery module 200 temperature ≥ 30°C), and the ambient temperature of the air-cooled heat exchange unit 50 is ≤ the temperature of the circulating fluid after the liquid cooling unit 10 cools the battery module 200 (e.g., 6°C), the cooling system 100 switches to operating condition one. The circulating fluid that has absorbed the heat generated by the battery module 200 flows from the liquid cooling unit 10 through the return pipe 12 to the first inlet pipe 51, so as to enter the air-cooled heat exchange unit 50 for the first cooling of the circulating fluid. The circulating fluid cooled by the air-cooled heat exchange unit 50 then flows out of the air-cooled heat exchange unit 50. The liquid flows through the first outlet pipe 52 to the second inlet pipe 31 to enter the liquid cooling heat exchange unit 30. The liquid cooling heat exchange unit 30, together with the coolant in the cold storage unit 20, performs heat exchange on the circulating liquid to perform a second cooling on the circulating liquid. After the second cooling, the circulating liquid flows from the liquid cooling heat exchange unit 30 through the third outlet pipe 32 to the supply pipe 11 to return to the liquid cooling unit 10. The circulating liquid circulates in the closed liquid cooling loop formed by the liquid cooling unit 10, the air cooling heat exchange unit 50 and the liquid cooling heat exchange unit 30 connected in series to cool and reduce the temperature of the battery module 200.

[0048] In some examples, the parameter Figure 2 As shown, the air-cooled heat exchange unit 50 is configured with a second liquid outlet pipe 53 that connects the first liquid outlet pipe 52 and the liquid supply pipe 11. The cooling system 100 also includes a second valve body 72 configured on the first liquid outlet pipe 52 and a second circulation pump 64 configured on the first liquid inlet pipe 51 to form a second liquid cooling circulation loop. When the battery module 200 temperature is high (e.g., battery module 200 temperature ≥ 30°C) and the ambient temperature of the air-cooled heat exchange unit 50 is ≤ the temperature of the circulating liquid after the liquid-cooled unit 10 cools the battery module 200 (e.g., 6°C), the second circulation pump 64 is turned on and the second valve body 72 is closed. The circulating liquid that has absorbed the heat generated by the battery module 200 flows from the liquid-cooled unit 10 through the return pipe 12 to the first inlet pipe 51, so as to enter the air-cooled heat exchange unit 50 to cool the circulating liquid. The cooled circulating liquid flows from the air-cooled heat exchange unit 50 through the second outlet pipe 53 to the supply pipe 11, so as to return to the liquid-cooled unit 10. The circulating liquid circulates in the closed second liquid-cooled circulation loop formed by the liquid-cooled unit 10 and the air-cooled heat exchange unit 50 connected in series, so as to cool down the battery module 200.

[0049] In some examples, the parameter Figure 3As shown, the cooling system 100 also includes: a sixth valve body 76 disposed on the second liquid outlet pipe 53, a second through pipe 62 connecting the second liquid inlet pipe 31 and the liquid return pipe 12, and a first circulation pump 63 disposed on the second liquid inlet pipe 31 to form a third liquid cooling circulation loop. When the battery module 200 temperature is high (e.g., battery module 200 temperature ≥ 30℃) and the ambient temperature of the air-cooled heat exchange unit 50 is ≥ the temperature of the coolant in the cold storage unit 20, the first circulation pump 63 is turned on, and the second valve body 72, the sixth valve body 76 and the second circulation pump 64 are turned off. The circulating liquid that has absorbed the heat generated by the battery module 200 flows from the liquid cooling unit 10 through the return pipe 12 to the second pipe 62, and then through the second pipe 62 to the second inlet pipe 31, so as to enter the liquid cooling heat exchange unit 30. The liquid cooling heat exchange unit 30, together with the coolant in the cold storage unit 20, performs heat exchange on the circulating liquid to cool it. The cooled circulating liquid flows from the liquid cooling heat exchange unit 30 through the third outlet pipe 32 to the supply pipe 11 to return to the liquid cooling unit 10. The circulating liquid circulates in the closed third liquid cooling circulation loop formed by the liquid cooling unit 10 and the liquid cooling heat exchange unit 30 connected in series to cool down the battery module 200.

[0050] In some examples, the parameter Figure 4 As shown, the cooling system 100 also includes: a fourth valve body 74 disposed on the return pipe 12, a fifth valve body 75 disposed on the supply pipe 11, and a first through pipe 61 connecting the first inlet pipe 51 and the third outlet pipe 32 to form a cooling circulation loop. When the ambient temperature of the air-cooled heat exchange unit 50 is less than or equal to the temperature of the coolant in the cold storage unit 20 (e.g., 6°C), the first circulation pump 63 and the second valve body 72 are turned on, and the second circulation pump 64, the fourth valve body 74, the fifth valve body 75 and the sixth valve body 76 are turned off. The circulating liquid in the liquid-cooled heat exchange unit 30 flows through the third outlet pipe 32 to the first inlet pipe 61, and then through the first inlet pipe 61 to the first inlet pipe 51 to enter the air-cooled heat exchange unit 50. The air-cooled heat exchange unit 50 cools the circulating liquid. The cooled circulating liquid flows from the air-cooled heat exchange unit 50 through the first outlet pipe 52 to the second inlet pipe 31 to enter the liquid-cooled heat exchange unit 30. The circulating liquid in the liquid-cooled heat exchange unit 30 exchanges heat with the coolant in the cold storage unit 20. The circulating liquid circulates in the closed cooling loop formed by the liquid-cooled heat exchange unit 30 and the air-cooled heat exchange unit 50 connected in series to reduce the temperature of the coolant in the cold storage unit 20. When the ambient temperature is low, the air-cooled heat exchange unit 50 uses ambient air to cool the circulating liquid, reducing the operating time and energy consumption required by the chiller 40 to cool the cold storage unit 20, so as to make full use of the ambient cold source and reduce energy consumption.

[0051] In some examples, the liquid cooling unit 10 is configured to mount a liquid cooling plate (not shown) containing circulating fluid (e.g., a 50% aqueous ethylene glycol solution) close to the battery module 200, and a supply pipe 11 and a return pipe 12 connecting the inlet and outlet of the liquid cooling plate, respectively. The liquid cooling plate is close to the battery module 200 to absorb the heat generated during the operation of the battery module 200, and the circulating fluid that has absorbed the heat from the battery module 200 is cooled by the air-cooled heat exchange unit 50 and / or the liquid-cooled heat exchange unit 30.

[0052] In some examples, the air-cooled heat exchange unit 50 includes a finned condenser (not shown) that dissipates heat by forcing ambient air through the finned condenser using a fan to remove heat from the circulating liquid.

[0053] In some examples, the liquid-cooled heat exchange unit 30 can be configured as, for example, a plate heat exchanger, a shell-and-tube heat exchanger, a spiral coil heat exchanger made of metal tubes (such as aluminum tubes or stainless steel tubes) spirally wound, or a serpentine coil heat exchanger made of metal tubes (such as aluminum tubes or stainless steel tubes) bent into a serpentine structure, to work in conjunction with the coolant in the cold storage unit 20 to cool the circulating liquid. The coolant in the cold storage unit 20 can be a mixture of ultrapure water and a corrosion inhibitor to prevent corrosion of the metal tubes.

[0054] In some examples, the parameter Figure 5 As shown, the cooling system 100 also includes an expansion tank 80, which connects the return pipe 12 and the supply pipe 11. During the operation of the cooling system 100, the circulating fluid will expand or contract in volume due to temperature changes. The expansion tank 80 provides additional storage space for the circulating fluid, accommodating the fluid that expands due to temperature increases or replenishing the fluid that contracts due to temperature decreases. By adjusting the volume of the circulating fluid, the expansion tank 80 can effectively mitigate pressure fluctuations within the cooling system 100, ensuring that the cooling system 100 operates within a stable pressure range. This avoids pipe damage caused by changes in the volume of the circulating fluid, improving the safety and reliability of the cooling system 100. As a storage container for the circulating fluid, the expansion tank 80 can promptly replenish the fluid when the circulating fluid in the cooling system 100 decreases due to leaks or other reasons, ensuring sufficient circulating fluid volume and preventing a decrease in cooling effect due to insufficient fluid.

[0055] In some examples, the cooling system 100 further includes: multiple cold storage units 20, which are interconnected and each is equipped with at least one liquid-cooled heat exchange unit 30, and an air-cooled heat exchange unit 50 matched to the liquid-cooled heat exchange unit 30. The interconnected multiple cold storage units 20 increase the coolant storage capacity of the cooling system 100, enabling it to store more cooling energy. When the battery module 200 has a high temperature or high cooling demand, the multiple cold storage units 20 can provide sufficient cooling capacity, ensuring the efficient operation of the cooling system 100. Furthermore, the cooling energy reserve of the multiple cold storage units 20 extends the continuous cooling time of the cooling system 100, making it suitable for scenarios involving long-term high-load operation.

[0056] The air-cooled heat exchange unit 50, matched with the liquid-cooled heat exchange unit 30, can switch operating modes according to ambient temperature and cooling requirements. When the ambient temperature is low, the air-cooled heat exchange unit 50 is used preferentially; when the ambient temperature is high, the liquid-cooled heat exchange unit 30 and the cold storage unit 20 are used in a coordinated cooling mode. By flexibly switching operating modes, the cooling system 100 can adjust its operating mode according to ambient temperature and cooling requirements, ensuring efficient cooling under different conditions. The cooling system 100 achieves efficient cooling with minimal energy consumption, avoiding unnecessary energy waste. Furthermore, the multiple cold storage units 20 serve as backups for each other. When one cold storage unit 20 fails or requires maintenance, the others can continue to provide cooling capacity, ensuring that the cooling system 100 can still operate normally even when some components fail. This allows the cooling system 100 to continue operating even when some components are under maintenance or fail, reducing downtime and maintenance costs. Furthermore, multiple cold storage units 20 can simultaneously utilize ice storage technology. During off-peak hours at night, the chiller 40 provides centralized cooling for multiple cold storage units 20, storing the cold energy in multiple cold storage units 20 to release the cold energy during peak hours of daytime or when cooling demand is high.

[0057] In some examples, the cooling system 100 also includes: multiple cold storage units 20, each cold storage unit 20 independently configured with a liquid-cooled heat exchange unit 30, and an air-cooled heat exchange unit 50 matched to the liquid-cooled heat exchange unit 30. Each cold storage unit 20 is independently configured with a liquid-cooled heat exchange unit 30 and an air-cooled heat exchange unit 50 to form an independent cooling module (not shown). The cooling system 100 can flexibly increase or decrease the operation of the cooling modules according to changes in cooling demand. Multiple cooling modules can operate in parallel or individually as needed. The cooling modules make maintenance and repair more convenient, and maintenance of a single cooling module will not affect the normal operation of other cooling modules. Multiple independent cold storage units 20 and their matched liquid-cooled heat exchange units 30 and air-cooled heat exchange units 50 can provide cooling capacity simultaneously to meet high load or large capacity cooling demands. When the battery module 200 has a high temperature or a large cooling demand, multiple cooling modules operate in parallel, significantly improving the cooling capacity of the cooling system 100. The cold storage units 20 extend the continuous cooling time of the cooling system 100, making it suitable for scenarios with long-term high-load operation.

[0058] Each cooling module can operate independently based on ambient temperature and cooling demand. When the ambient temperature is low, the air-cooled heat exchange unit 50 is used preferentially; when the ambient temperature is high, the liquid-cooled heat exchange unit 30 and the cold storage unit 20 are used in a coordinated cooling mode. By flexibly switching operating modes, the cooling system 100 can adjust its operating mode according to ambient temperature and cooling demand, ensuring efficient cooling under different conditions. The cooling system 100 achieves efficient cooling with minimal energy consumption, avoiding unnecessary energy waste. Furthermore, multiple independent cooling modules serve as backups for each other; when one cooling module fails or requires maintenance, the others can continue to provide cooling capacity. Even when some cooling modules are under maintenance or fail, the cooling system 100 can still operate continuously, reducing downtime and maintenance costs. Each cold storage unit 20 can independently utilize ice storage technology. During off-peak electricity hours at night, the chiller 40 provides centralized cooling for multiple cold storage units 20, storing cold energy in them for release during peak electricity hours or when cooling demand is high.

[0059] Based on the same inventive concept, this embodiment also discloses an energy storage power station 1000, referenced... Figure 5As shown, the energy storage power station 1000 includes: an energy storage compartment 300 for housing the battery module 200, and a cooling system 100 as disclosed in the above embodiments for cooling the battery module 200. The energy storage compartment 300 is used to house the battery module 200, providing it with a safe and stable operating environment. The cooling system 100 is used to efficiently cool the battery module 200, ensuring that it operates within a suitable temperature range. The specific technical solution of the cooling system 100 included in the energy storage power station 1000 in this embodiment is the same as that in the aforementioned embodiments, and will not be repeated here.

[0060] In some examples, the parameter Figure 5 As shown, the energy storage power station 1000 also includes: a ground 400, an energy storage chamber 300 disposed on the ground 400; a cold storage unit 20 configured as a water storage tank 410 disposed below the ground 400, the water storage tank 410 containing coolant, and the liquid-cooled heat exchange unit 30 immersed in the coolant in the water storage tank 410; the energy storage chamber 300, the water storage tank 410 and the ground 400 are all made of concrete composite material.

[0061] The ground 400 provides stable support for the energy storage compartment 300 and the water tank 410. The ground 400 is made of concrete composite material, possessing high strength and durability, ensuring the stability of the overall structure. The energy storage compartment 300, also made of concrete composite material, is configured as a concrete composite structure with high compressive strength and fire resistance, effectively protecting the battery module 200 from external environmental influences (such as temperature, humidity, dust, etc.). When high temperatures occur within the energy storage compartment 300 or the battery module 200 catches fire, the high temperatures and flames generated by thermal runaway are effectively confined within the energy storage compartment 300, providing a longer time for the fire extinguishing system (not shown) to extinguish the fire, thus minimizing the impact on other battery modules 200 within the energy storage compartment 300. Furthermore, due to the structural characteristics of its internal solidified materials, the molten concrete of the concrete composite structure still possesses strong compressive strength, making the energy storage compartment 300 less prone to burn-through and collapse, providing a longer time for the fire extinguishing system to extinguish the fire, and preventing the fire from spreading uncontrollably due to flame propagation.

[0062] A water storage tank 410 is located below ground level 400 to hold coolant and immerses the liquid-cooled heat exchange unit 30, providing cold storage and heat exchange functions for the cooling system 100. The coolant in the water storage tank 410 serves as a cold storage medium, exchanging heat with the circulating fluid through the liquid-cooled heat exchange unit 30 when needed, providing efficient cooling capacity. The liquid-cooled heat exchange unit 30, immersed in the coolant in the water storage tank 410, can directly exchange heat with the circulating fluid, improving cooling efficiency. By placing the water storage tank 410 below ground level 400, underground space is fully utilized, saving above-ground space and optimizing the overall layout of the energy storage power station 1000. The thermal insulation properties of the concrete composite material reduce the thermal impact of the energy storage chamber 300 on the underground water storage tank 410, protecting the coolant in the water storage tank 410 from external temperature changes. Concrete composite materials are readily available and low-cost, while also possessing good environmental performance, reducing the construction and maintenance costs of the energy storage power station 1000.

[0063] In some examples, the water storage tank 410 can also be located on top of the energy storage compartment 300, operating on the same principle as when it is located below the ground level 400. Regardless of whether the water storage tank 410 is located on top of the energy storage compartment 300 or below the ground level 400, its function remains the same: to efficiently cool the battery module 300 by storing coolant and cooperating with the liquid-cooled heat exchange unit 30. This not only saves ground space but also makes full use of the unused area on top of the energy storage compartment 300, further optimizing the overall layout and compactness of the energy storage power station 1000.

[0064] In some examples, the energy storage power station 1000 includes multiple energy storage compartments 300; the cooling system 100 includes the same number of cold storage units 20 as the energy storage compartments 300. The multiple cold storage units 20 are interconnected and each is equipped with at least one liquid-cooled heat exchange unit 30 and a matching air-cooled heat exchange unit 50. Each energy storage compartment 300 corresponds to one cold storage unit 20. The multiple cold storage units 20 are interconnected and equipped with at least one liquid-cooled heat exchange unit 30 and a matching air-cooled heat exchange unit 50, enabling the battery modules 200 within each energy storage compartment 300 to achieve efficient cooling and avoiding overheating problems caused by insufficient cooling. The interconnected multiple cold storage units 20 increase the coolant storage capacity of the cooling system 100, allowing it to store more cooling energy. When the battery modules 200 within the energy storage compartment 300 have high temperatures or require significant cooling, the multiple cold storage units 20 can provide sufficient cooling capacity, ensuring the efficient operation of the cooling system 100. Furthermore, the cold storage capacity of multiple cold storage units 20 extends the continuous cooling time of the cooling system 100, making it suitable for scenarios involving long-term high-load operation.

[0065] The air-cooled heat exchange unit 50, matched with the liquid-cooled heat exchange unit 30, can switch operating modes according to ambient temperature and cooling requirements. When the ambient temperature is low, the air-cooled heat exchange unit 50 is used preferentially; when the ambient temperature is high, the liquid-cooled heat exchange unit 30 and the cold storage unit 20 are used in a coordinated cooling mode. The energy storage compartment 300 can obtain efficient cooling support under different ambient temperatures, ensuring the temperature stability of the battery module 200. By flexibly switching operating modes, the cooling system 100 can flexibly adjust its operating mode according to ambient temperature and cooling requirements, ensuring efficient cooling under different conditions. The cooling system 100 can achieve efficient cooling with minimal energy consumption, avoiding unnecessary energy waste. Furthermore, the multiple cold storage units 20 serve as backups for each other. When one cold storage unit 20 fails or requires maintenance, the other cold storage units 20 can continue to provide cooling capacity to the battery module 200 within the energy storage compartment 300, ensuring that the cooling system 100 can still operate normally even when some components fail. Even when some components are under maintenance or malfunction, the cooling system 100 can continue to operate, reducing downtime and maintenance costs. Furthermore, multiple cold storage units 20 can simultaneously utilize ice storage technology. During off-peak electricity hours at night, the chiller 40 provides centralized cooling to multiple cold storage units 20, storing the cold energy in them for release during peak electricity hours or when cooling demand is high.

[0066] In some examples, the energy storage power station 1000 includes multiple energy storage compartments 300; the cooling system 100 includes the same number of cold storage units 20 as the energy storage compartments 300. Each cold storage unit 20 is independently configured with a liquid-cooled heat exchange unit 30 and a matching air-cooled heat exchange unit 50. Each energy storage compartment 300 corresponds to an independent cold storage unit 20 and is configured with a liquid-cooled heat exchange unit 30 and a matching air-cooled heat exchange unit 50, forming an independent cooling module. When the battery module 200 has a high temperature or a large cooling requirement, the independent cooling module can respond quickly and achieve efficient cooling for the battery module 200 in the corresponding energy storage compartment 300.

[0067] Each cooling module can operate independently based on ambient temperature and cooling demand. When the ambient temperature is low, the air-cooled heat exchange unit 50 is used preferentially; when the ambient temperature is high, the liquid-cooled heat exchange unit 30 and the cold storage unit 20 are used in a coordinated cooling mode. By flexibly switching operating modes, the cooling system 100 can adjust its operating mode according to ambient temperature and cooling demand, ensuring efficient cooling under different conditions. The cooling system 100 can achieve efficient cooling with minimal energy consumption, avoiding unnecessary energy waste. Furthermore, multiple independent cooling modules serve as backups for each other. When one cooling module fails or requires maintenance, the other cooling modules can continue to provide cooling capacity to the battery modules 200 within the energy storage compartment 300. Even when some cooling modules are under maintenance or fail, the cooling system 100 can still operate continuously, reducing downtime and maintenance costs. Each cold storage unit 20 can independently utilize ice storage technology. During off-peak electricity hours at night, the chiller 40 provides centralized cooling for multiple cold storage units 20, storing the cold energy in multiple cold storage units 20 for release during peak electricity hours or when cooling demand is high.

[0068] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

[0069] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0070] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An energy-saving cooling system, characterized in that, include: A liquid cooling unit for cooling the battery module, a cold storage unit, a liquid cooling heat exchange unit disposed in the cold storage unit, a chiller for cooling the cold storage unit, and an air-cooled heat exchange unit. The chiller and the air-cooled heat exchange unit are configured to operate simultaneously or switch between operations, and include at least the following two operating conditions: In operating condition one, the liquid-cooled heat exchange unit, the air-cooled heat exchange unit and the liquid-cooled unit are connected in series to form a closed liquid-cooled circulation loop; In the second operating condition, the liquid-cooled heat exchange unit or the air-cooled heat exchange unit is connected in series with the liquid-cooled unit to form a closed liquid-cooled circulation loop.

2. The energy-saving cooling system according to claim 1, characterized in that, The air-cooled heat exchange unit has a first inlet pipe at its liquid inlet, which is connected to the return pipe included in the liquid-cooled unit. The liquid-cooled heat exchange unit also has a second inlet pipe at its liquid inlet. The air-cooled heat exchange unit has a first outlet pipe at its liquid outlet, which is connected to the second inlet pipe. The liquid-cooled heat exchange unit also has a third outlet pipe at its liquid outlet, which is connected to the supply pipe included in the liquid-cooled unit, to form a first liquid-cooled circulation loop.

3. The energy-saving cooling system according to claim 2, characterized in that, The air-cooled heat exchange unit is configured with a second liquid outlet pipe that connects the first liquid outlet pipe and the liquid supply pipe. The cooling system further includes: a second valve body configured in the first liquid outlet pipe and a second circulation pump configured in the first liquid inlet pipe to form a second liquid-cooled circulation loop. The cooling system further includes: a sixth valve body disposed on the second liquid outlet pipe, a second through pipe connecting the second liquid inlet pipe and the liquid return pipe, and a first circulation pump disposed on the second liquid inlet pipe to form a third liquid cooling circulation loop; The cooling system further includes: a fourth valve body disposed on the return pipe, a fifth valve body disposed on the supply pipe, and a first through pipe connecting the first inlet pipe and the third outlet pipe to form a cooling circulation loop.

4. The energy-saving cooling system according to claim 3, characterized in that, The cooling system further includes an expansion tank, which is connected to the return pipe and the supply pipe.

5. The energy-saving cooling system according to claim 3, characterized in that, The cooling system further includes: a plurality of cold storage units, the plurality of cold storage units being interconnected and at least one liquid-cooled heat exchange unit being configured therewith, and an air-cooled heat exchange unit being configured in conjunction with the liquid-cooled heat exchange unit.

6. The energy-saving cooling system according to claim 3, characterized in that, The cooling system further includes: a plurality of cold storage units, each cold storage unit being independently configured with a liquid-cooled heat exchange unit, and an air-cooled heat exchange unit matched with the liquid-cooled heat exchange unit.

7. An energy storage power station, characterized in that, include: An energy storage compartment for housing a battery module, and a cooling system as described in any one of claims 1 to 6 for cooling the battery module.

8. The energy storage power station according to claim 7, characterized in that, The energy storage power station also includes: a ground surface, and the energy storage compartment is disposed on the ground surface; The cold storage unit is configured as a water tank located below the ground level, the water tank contains coolant, and the liquid-cooled heat exchange unit is immersed in the coolant in the water tank; The energy storage chamber, the water storage tank, and the floor are all made of concrete composite material.

9. The energy storage power station according to claim 8, characterized in that, The energy storage power station includes multiple energy storage compartments; The cooling system includes the same number of cold storage units as the energy storage compartment, multiple cold storage units are interconnected and at least one liquid-cooled heat exchange unit is configured thereon, and an air-cooled heat exchange unit is configured to match the liquid-cooled heat exchange unit.

10. The energy storage power station according to claim 8, characterized in that, The energy storage power station includes multiple energy storage compartments; The energy-saving cooling system includes the same number of cold storage units as the energy storage compartment, each cold storage unit is independently configured with a liquid-cooled heat exchange unit, and an air-cooled heat exchange unit matched with the liquid-cooled heat exchange unit.

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