Energy-saving heat management system for energy storage

Abstract

The invention relates to the technical field of heat management systems, in particular to an energy-saving heat management system for energy storage, which comprises an energy storage battery water-cooling plate, a cooling-water machine and a central control module connected to the cooling-water machine, the energy storage battery water-cooling plate and the cooling-water machine are connected to form a temperature management loop, and the system is characterized by further comprising an energy-saving management system, the energy-saving management system comprises a heat preservation water tank, a heat exchanger, an inner circulating water pump, an outer circulating water pump and an internet-of-things meteorological monitoring and forecasting system. The inner circulating water pump, the outer circulating water pump and the internet-of-things meteorological monitoring and forecasting system are electrically connected with the central control module. By means of an internet-of-things meteorological monitoring and forecasting system, day and night temperature changes are pre-judged in advance, cooling liquid is heated or cooled through the natural environment in the temperature appropriate time period, and heat or cold is stored in a heat preservation water tank; therefore, a large amount of electric energy consumed by frequent switching of heating and cooling functions and long-time operation of the cooling-water machine in an area with large day-night temperature difference is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management systems, and in particular to an energy-saving thermal management system for energy storage. Background Art

[0002] With the vigorous development and widespread application of clean energy around the world, the importance of energy storage systems as a key link in ensuring stable energy supply and improving energy utilization efficiency has become increasingly prominent. Among the many energy storage systems, battery energy storage has become one of the most widely used energy storage methods due to its advantages such as high energy density and flexible charging and discharging characteristics. For battery energy storage systems, the performance, life and safety of the battery depend largely on its operating temperature environment. A suitable operating temperature range can ensure that the battery maintains a high charging and discharging efficiency, extend the battery life, and effectively reduce safety risks such as thermal runaway. Therefore, an efficient and accurate thermal management system has become an indispensable and important part of the energy storage system. At present, liquid cooling thermal management has been widely used in energy storage systems due to its excellent heat dissipation capacity, good temperature uniformity and convenient scalability.

[0003] In conventional liquid cooling thermal management systems, the chiller is the core temperature regulating device, and its operating logic is usually controlled according to the real-time temperature of the battery at that time. When the battery temperature is higher than the preset upper temperature limit, the chiller starts the cooling function, absorbing the heat generated by the battery through circulating coolant to reduce the battery temperature to a reasonable range; and when the battery temperature is lower than the preset lower temperature limit, especially in some cold environments, the chiller starts the heating function to heat the coolant, thereby raising the battery temperature and ensuring that the battery can work within the appropriate temperature range. However, in some areas with large temperature differences between day and night, the liquid cooling thermal management of energy storage systems faces severe challenges. For example, in Xinjiang, Qinghai, Tibet and other places, due to the high altitude, the temperature difference between day and night can exceed 15°C, and even in some cases can reach more than 30°C. Due to the drastic changes in ambient temperature between day and night, the battery temperature fluctuates greatly in a short period of time, which causes the chiller to frequently switch between cooling and heating functions. Frequent function switching not only puts forward extremely high response speed and stability requirements for the control system of the chiller, increases the complexity and error probability of the control algorithm, but also makes the mechanical parts inside the chiller, such as compressors, valves, etc., subject to frequent start-stop impacts, greatly shortening the service life of the equipment and increasing the equipment maintenance cost. At the same time, in areas with large temperature differences between day and night, in order to always maintain the battery at a suitable temperature, the chiller often needs to work uninterruptedly for a long time, which undoubtedly further aggravates the wear of the equipment, reduces the reliability of the system, and significantly increases energy consumption, which runs counter to the goal of energy storage systems to pursue high efficiency and energy saving. In summary, in view of the problems of frequent switching of chillers and long working hours in the existing liquid cooling thermal management of energy storage systems in areas with large temperature differences between day and night, it is urgent to develop an innovative technical solution to improve the thermal management efficiency, equipment reliability and energy utilization efficiency of energy storage systems in complex temperature environments. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0005] An energy-saving thermal management system for energy storage, comprising an energy storage battery water-cooling plate, a chiller and a central control module connected to the chiller, wherein the energy storage battery water-cooling plate and the chiller are connected to form a temperature management loop, characterized in that it also comprises an energy-saving management system, the energy-saving management system comprises an insulated water tank, a heat exchanger, an inner circulation water pump, an outer circulation water pump and an Internet of Things meteorological monitoring and forecasting system, wherein the inner circulation water pump, the outer circulation water pump and the Internet of Things meteorological monitoring and forecasting system are electrically connected to the central control module respectively; Among them, the energy storage battery water cooling plate, the external circulation water pump and the thermal insulation water tank are connected to form an external circulation loop, and the heat exchanger, the internal circulation water pump and the thermal insulation water tank are connected to form an internal circulation loop.

[0006] Preferably, the energy-saving thermal management system for energy storage further includes a plurality of electrically controlled valves respectively electrically connected to the central control module, and the external circulation loop and the internal circulation loop are integrated into the temperature management loop through the electrically controlled valves.

[0007] Preferably, the electronically controlled valve comprises a first valve, a second valve, a third valve and a fourth valve, the first valve being connected in series to the temperature management loop, the second valve being connected to the external circulation water pump and then connected in parallel to the first valve and the chiller, the internal circulation loop being provided with branch ends between the internal circulation water pump and the insulated water tank and between the insulated water tank and the heat exchanger, respectively, the internal circulation loop being connected in series to the temperature management loop through the two branch ends, the third valve being connected in series between the branch end and the insulated water tank, and the fourth valve being connected in series between the branch end and the heat exchanger.

[0008] Preferably, the first valve, the second valve, the third valve and the fourth valve are all solenoid valves.

[0009] Preferably, the energy storage battery water cooling plate is made of aluminum material.

[0010] Preferably, the central control module predicts the temperature of the future night according to the Internet of Things meteorological monitoring and forecasting system. When the temperature of the future night is lower than the preset degree, it is determined that the energy storage battery water cooling plate needs to be heated. The central control module drives the inner circulation loop in advance under the high temperature during the day according to the determination result. The coolant exchanges heat with the air through the heat exchanger to increase the temperature of the coolant. After the temperature reaches the daytime predicted value, the inner circulation loop is closed to allow the coolant to remain in the insulated water tank to achieve heat storage. At night, according to the heating needs of the energy storage battery, the outer circulation loop is driven, and the high-temperature coolant in the existing insulated water tank is used to heat the energy storage battery water cooling plate. If the heating temperature and heat are insufficient, the outer circulation loop is closed, and the temperature management loop is driven to heat the energy storage battery water cooling plate.

[0011] Preferably, the central control module predicts the future daytime temperature based on the Internet of Things meteorological monitoring and forecasting system. When the future daytime temperature is higher than a preset degree, it is determined that the energy storage battery water-cooled plate needs to be cooled. The central control module drives the inner circulation loop in advance under low temperature conditions at night according to the determination result. The coolant exchanges heat with the air through the heat exchanger to reduce the coolant temperature. After the temperature reaches the predicted value at night, the inner circulation loop is closed to allow the coolant to remain in the insulated water tank to achieve cold storage. During the day, according to the heating needs of the energy storage battery, the outer circulation loop is driven, and the low-temperature coolant in the existing insulated water tank is used to cool the energy storage battery water-cooled plate. If the cooling temperature and cooling amount are insufficient, the outer circulation loop is closed, and the temperature management loop is driven to cool the energy storage battery water-cooled plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: With the help of the Internet of Things meteorological monitoring and forecasting system, the temperature changes during the day and night can be predicted in advance, and the natural environment can be used to heat or cool the coolant during the temperature period, and the heat or cold can be stored in the insulated water tank; this greatly reduces the large amount of electricity consumed by the chiller due to frequent switching of heating and cooling functions and long-term operation in areas with large temperature differences between day and night, which is in line with the goal of energy storage systems to pursue high efficiency and energy saving.

[0013] By storing heat and cold in advance, the frequency of use of the chiller is greatly reduced; when heating is needed at night or cooling is needed during the day, the heat or cold stored in the insulated water tank is used first, and the chiller is started only when the heat or cold is insufficient; this greatly reduces the number of starts and stops of the mechanical parts inside the chiller, effectively extending the service life of the chiller and reducing equipment maintenance costs; in addition, the system reduces the number of function switching times of the chiller, reduces the complexity and error probability of the control system; at the same time, the insulated water tank plays a buffering role in the thermal management process, making the temperature regulation of the energy storage battery water cooling plate more stable, avoiding the adverse effects of rapid temperature changes on battery performance and life, thereby improving the stability and reliability of the entire energy storage system.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of waterway connection of the present invention; Figure 2 It is a circuit connection module block diagram of the present invention; Figure 3 It is another circuit connection module block diagram of the present invention.

[0017] The reference numerals and names in the figures are as follows: Energy storage battery water cooling plate 10, chiller 11, central control module 12, insulation water tank 20, heat exchanger 21, internal circulation water pump 22, external circulation water pump 23, Internet of Things meteorological monitoring and forecasting system 24, branch end 25, electronically controlled valve 30, first valve 31, second valve 32, third valve 33, fourth valve 34. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-3 In an embodiment of the present invention, an energy-saving thermal management system for energy storage includes an energy storage battery water-cooling plate 10, a chiller 11, and a central control module 12 connected to the chiller 11. The energy storage battery water-cooling plate 10 and the chiller 11 are connected to form a temperature management loop, characterized in that it also includes an energy-saving management system, the energy-saving management system includes an insulation water tank 20, a heat exchanger 21, an internal circulation water pump 22, an external circulation water pump 23, and an Internet of Things meteorological monitoring and forecasting system 24, and the internal circulation water pump 22, the external circulation water pump 23, and the Internet of Things meteorological monitoring and forecasting system 24 are electrically connected to the central control module 12 respectively; Among them, the energy storage battery water cooling plate 10, the external circulation water pump 23 and the thermal insulation water tank 20 are connected to form an external circulation loop, and the heat exchanger 21, the internal circulation water pump 22 and the thermal insulation water tank 20 are connected to form an internal circulation loop.

[0020] In the above technical solution, by selecting a mode, the central control module 12 predicts the temperature of the future day or night according to the Internet of Things meteorological monitoring and forecasting system 24. The Internet of Things meteorological monitoring and forecasting system 24 connects meteorological sensors and other devices through the Internet of Things technology to achieve real-time monitoring and forecasting of meteorological data, highlighting the Internet of Things connection characteristics and meteorological business functions of the system; When the central control module 12 predicts the temperature at night in the future according to the Internet of Things meteorological monitoring and forecasting system 24, when the temperature at night in the future is lower than the preset degree, it is determined that the energy storage battery water cooling plate 10 needs to be heated. The central control module 12 drives the inner circulation loop in advance under the high temperature during the day according to the determination result. The coolant exchanges heat with the air through the heat exchanger 21 to increase the temperature of the coolant. After the temperature reaches the predicted value during the day, the inner circulation loop is closed to allow the coolant to remain in the insulated water tank 20 to achieve heat storage. At night, according to the heating needs of the energy storage battery, the outer circulation loop is driven to heat the energy storage battery water cooling plate 10 with the high-temperature coolant in the existing insulated water tank 20. If the heating temperature and heat are insufficient, the outer circulation loop is closed and the temperature management loop is driven to heat the energy storage battery water cooling plate 10.

[0021] When the central control module 12 predicts the future daytime temperature according to the Internet of Things meteorological monitoring and forecasting system 24, when the future daytime temperature is higher than the preset degree, it is determined that the energy storage battery water cooling plate 10 needs to be cooled. The central control module 12 drives the inner circulation loop in advance under low temperature conditions at night according to the determination result. The coolant exchanges heat with the air through the heat exchanger 21 to reduce the coolant temperature. After the temperature reaches the predicted value at night, the inner circulation loop is closed to allow the coolant to remain in the insulated water tank 20 to achieve cold storage. During the day, according to the heating needs of the energy storage battery, the outer circulation loop is driven, and the low-temperature coolant in the existing insulated water tank 20 is used to cool the energy storage battery water cooling plate 10. If the cooling temperature and cooling amount are insufficient, the outer circulation loop is closed, and the temperature management loop is driven to cool the energy storage battery water cooling plate 10.

[0022] Through the above technical solution, the system can predict the temperature change during the day and night in advance with the help of the Internet of Things meteorological monitoring and forecasting system 24, use the natural environment to heat or cool the coolant during the temperature period, and store the heat or cold in the thermal insulation water tank 20; for example, when the temperature is high during the day, heat is stored for heating the energy storage battery water cooling plate 10 at night, and when the temperature is low at night, cold is stored for cooling the energy storage battery water cooling plate 10 during the day; this greatly reduces the large amount of electric energy consumed by the chiller 11 due to frequent switching of heating and cooling functions and long-term operation in areas with large temperature differences between day and night, which meets the goal of the energy storage system to pursue high efficiency and energy saving; In the traditional system, the frequent function switching and long-term operation of the chiller 11 cause serious start-stop impact and excessive wear to its internal mechanical parts such as compressors and valves; while the present system greatly reduces the frequency of use of the chiller 11 by storing heat and cold in advance; when heating is needed at night or cooling is needed during the day, the heat or cold stored in the insulated water tank 20 is used first, and the chiller 11 is started only when the heat or cold is insufficient; this greatly reduces the start-stop times of the internal mechanical parts of the chiller 11, effectively prolongs the service life of the chiller 11, and reduces the equipment maintenance cost; in addition, the present system reduces the function switching times of the chiller 11, reduces the complexity and error probability of the control system; at the same time, the insulated water tank 20 plays a buffering role in the thermal management process, making the temperature regulation of the energy storage battery water cooling plate 10 more stable, avoiding the adverse effects of rapid temperature changes on battery performance and life, thereby improving the stability and reliability of the entire energy storage system; Based on the IoT meteorological monitoring and forecasting system 24, the heating and cooling process of the coolant is planned in advance, and the temperature of the energy storage battery water cooling plate 10 can be accurately controlled according to the actual temperature changes in the future; when the heat storage coolant is used for heating at night or the cold storage coolant is used for cooling during the day, the flow rate and temperature of the coolant in the external circulation loop can be accurately adjusted according to the real-time temperature requirements of the energy storage battery to ensure that the energy storage battery is always in a suitable operating temperature range, which is conducive to maintaining a high charging and discharging efficiency of the battery, extending the battery life, and reducing safety risks such as thermal runaway; In addition, the various components in the energy-saving management system, such as the insulated water tank 20, the heat exchanger 21, the internal circulation water pump 22, the external circulation water pump 23, etc., are relatively independent and easy to expand; for energy storage systems of different sizes and regions with different temperature change characteristics, the specifications, quantity or control parameters of the components can be adjusted to flexibly adapt to various application scenarios; for example, when the temperature difference between day and night is larger or the number of energy storage batteries is larger, the volume of the insulated water tank 20 can be appropriately increased or the heat exchange area of ​​the heat exchanger 21 can be increased to meet higher thermal management requirements.

[0023] Please refer to Figure 1-3On the basis of the above technical scheme, it is further proposed that the energy-saving thermal management system for energy storage also includes a plurality of electrically controlled valves 30 respectively electrically connected to the central control module 12, and the external circulation loop and the internal circulation loop are integrated in the temperature management loop through the electrically controlled valves 30; the electrically controlled valves 30 include a first valve 31, a second valve 32, a third valve 33 and a fourth valve 34, the first valve 31 is connected in series to the temperature management loop, the second valve 32 is connected to the external circulation water pump 23 and then connected in parallel with the first valve 31 and the chiller 11, the internal circulation loop is respectively provided with branch ends 25 between the internal circulation water pump 22 and the insulated water tank 20 and between the insulated water tank 20 and the heat exchanger 21, the internal circulation loop is connected in series to the temperature management loop through the two branch ends 25, the third valve 33 is connected in series between the branch end 25 and the insulated water tank 20, and the fourth valve 34 is connected in series between the branch end 25 and the heat exchanger 21.

[0024] Under the night heating condition, when the Internet of Things meteorological monitoring and forecasting system 24 predicts that the temperature at night in the future will be lower than the preset degree, the central control module 12 determines that the energy storage battery water cooling plate 10 needs to be heated; when the temperature is high during the day, the central control module 12 drives the internal circulation loop; at this time, the fourth valve 34 and the third valve 33 are opened, the internal circulation water pump 22 works, the coolant flows out from the insulation water tank 20, enters the heat exchanger 21 through the fourth valve 34 and the third valve 33 to exchange heat with the air, and the temperature rises; after reaching the daytime predicted value, the internal circulation water pump 22, the third valve 33 and the fourth valve 34 are closed, and the coolant remains in the insulation water tank 20. The warm water tank 20 stores heat; at night, the central control module 12 opens the second valve 32 and the third valve 33, and the external circulation water pump 23 works. The high-temperature coolant stored in the insulated water tank 20 enters the energy storage battery water-cooled plate 10 through the external circulation water pump 23 and the second valve 32, and then flows back to the insulated water tank 20 through the third valve 33, that is, the external circulation loop runs to heat the energy storage battery water-cooled plate 10; if the heating temperature and heat are insufficient, the central control module 12 closes the second valve 32, opens the first valve 31, starts the chiller 11, and heats the energy storage battery water-cooled plate 10 through the temperature management loop.

[0025] Under the night heating condition, when the predicted future daytime temperature is higher than the preset degree, it is determined that the energy storage battery water cooling plate 10 needs to be cooled; when the temperature is low at night, the central control module 12 drives the internal circulation loop; at this time, the third valve 33 and the fourth valve 34 are opened, the internal circulation water pump 22 works, the coolant flows out of the insulation water tank 20, enters the heat exchanger 21 through the third valve 33 and the fourth valve 34 to exchange heat with the air, and the temperature drops; after reaching the night prediction value, the internal circulation water pump 22, the third valve 33 and the fourth valve 34 are closed, and the coolant remains in the insulation water tank 20 to store cold; during the day, the central control module Block 12 opens the second valve 32 and the third valve 33, closes the first valve 31, and the external circulation water pump 23 works. The low-temperature coolant stored in the thermal insulation water tank 20 enters the energy storage battery water cooling plate 10 through the external circulation water pump 23 and the second valve 32, and then flows back to the thermal insulation water tank 20 through the third valve 33, that is, the external circulation loop runs to cool the energy storage battery water cooling plate 10; if the cooling temperature and cooling amount are insufficient, the central control module 12 closes the second valve 32, opens the first valve 31, starts the chiller 11, and cools the energy storage battery water cooling plate 10 through the temperature management loop.

[0026] Through the precise control of multiple electronically controlled valves 30, the inner circulation loop, the outer circulation loop and the temperature management loop can be flexibly switched and work in coordination; under different working conditions, the circulation path and working mode of the coolant can be adjusted quickly and accurately, which greatly improves the response speed and operating efficiency of the thermal management system and ensures that the energy storage battery can always work in the optimal temperature control mode; The setting of the electric control valve 30 enables the system to flexibly choose whether to use the heat or cold stored in the insulated water tank 20 or to activate the chiller 11 for temperature adjustment according to the actual temperature requirements and energy storage conditions; for example, when the heat or cold is sufficient, the system can completely rely on the external circulation loop to utilize the coolant in the insulated water tank 20; when the heat or cold is insufficient, the system can switch to the temperature management loop in time to activate the chiller 11, which greatly enhances the flexibility of the system to cope with complex temperature changes and different energy storage battery thermal management requirements; In addition, precise control of the electronically controlled valve 30 avoids unnecessary energy consumption; when the natural environment can be used to heat or cool the coolant and store heat or cold, the electronically controlled valve 30 cuts off the connection with the chiller 11, reducing the number of starts and operating time of the chiller 11, further reducing the energy consumption of the entire system, improving energy utilization efficiency, and meeting the core requirements of energy storage system energy saving; such reasonable control of the electronically controlled valve 30 reduces the frequent start and stop and overload operation of key equipment such as the chiller 11; makes the equipment operation more stable, reduces the risk of equipment failure due to frequent operation, improves the reliability and stability of the entire thermal management system, and reduces maintenance costs and downtime.

[0027] On the basis of the above technical scheme, it is further proposed that the first valve 31, the second valve 32, the third valve 33 and the fourth valve 34 are all solenoid valves; in the energy-saving thermal management system for energy storage, the first valve 31, the second valve 32, the third valve 33 and the fourth valve 34 are solenoid valves, which have the characteristics of fast response and precise control, can act at the moment of working condition switching, quickly adjust the coolant circulation path, improve the system response and temperature control accuracy, and are easy to automatically control, and cooperate with the central control module 12 to realize the automatic operation of the system, reducing labor costs and failure risks; the energy storage battery water cooling plate 10 is made of aluminum material, which can efficiently transfer heat or cold with the excellent thermal conductivity of aluminum, ensure that the battery works at a suitable temperature, improve battery performance and life, and is light in weight and high in strength, which is conducive to installation and transportation, reducing costs, and also has good corrosion resistance due to the ability to form a dense oxide film on the surface, preventing coolant erosion, reducing leakage risks, ensuring long-term stable operation of the thermal management system, and reducing maintenance costs.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. An energy-saving thermal management system for energy storage, characterized in that: The invention comprises an energy storage battery water cooling plate (10), a water chiller (11) and a central control module (12) connected to the water chiller (11); the energy storage battery water cooling plate (10) and the water chiller (11) are connected to form a temperature management loop, and is characterized in that it also comprises an energy-saving management system, the energy-saving management system comprises a heat-insulating water tank (20), a heat exchanger (21), an internal circulation water pump (22), an external circulation water pump (23) and an Internet of Things meteorological monitoring and forecasting system (24); the internal circulation water pump (22), the external circulation water pump (23) and the Internet of Things meteorological monitoring and forecasting system (24) are respectively electrically connected to the central control module (12); The energy storage battery water cooling plate (10), the external circulation water pump (23) and the thermal insulation water tank (20) are connected to form an external circulation loop, and the heat exchanger (21), the internal circulation water pump (22) and the thermal insulation water tank (20) are connected to form an internal circulation loop.

2. The energy-saving thermal management system for energy storage according to claim 1, characterized in that: The energy-saving thermal management system for energy storage further comprises a plurality of electrically controlled valves (30) respectively electrically connected to the central control module (12), and the external circulation loop and the internal circulation loop are integrated into the temperature management loop via the electrically controlled valves (30).

3. The energy-saving thermal management system for energy storage according to claim 2, characterized in that: The electric control valve (30) comprises a first valve (31), a second valve (32), a third valve (33) and a fourth valve (34); the first valve (31) is connected in series to the temperature management loop; the second valve (32) is connected to the external circulation water pump (23) and then connected in parallel to the first valve (31) and the chiller (11); the internal circulation loop is provided with branch ends (25) between the internal circulation water pump (22) and the insulation water tank (20) and between the insulation water tank (20) and the heat exchanger (21); the internal circulation loop is connected in series to the temperature management loop via the two branch ends (25); the third valve (33) is connected in series between the branch end (25) and the insulation water tank (20); and the fourth valve (34) is connected in series between the branch end (25) and the heat exchanger (21).

4. The energy-saving thermal management system for energy storage according to claim 3, characterized in that: The first valve (31), the second valve (32), the third valve (33) and the fourth valve (34) are all solenoid valves.

5. The energy-saving thermal management system for energy storage according to claim 1, characterized in that: The energy storage battery water cooling plate (10) is made of aluminum material.

6. An energy-saving thermal management system for energy storage according to any one of claims 1 to 5, characterized in that: The central control module (12) predicts the temperature of the future night according to the Internet of Things meteorological monitoring and forecasting system (24). When the temperature of the future night is lower than a preset degree, it is determined that the energy storage battery water cooling plate (10) needs to be heated. The central control module (12) drives the inner circulation loop in advance under the high temperature during the day according to the determination result. The coolant exchanges heat with the air through the heat exchanger (21) to increase the temperature of the coolant. After the temperature reaches the daytime predicted value, the inner circulation loop is closed to allow the coolant to remain in the insulation water tank (20) to achieve heat storage. At night, according to the heating needs of the energy storage battery, the outer circulation loop is driven to heat the energy storage battery water cooling plate (10) with the high temperature coolant in the existing insulation water tank (20). If the heating temperature and heat are insufficient, the outer circulation loop is closed and the temperature management loop is driven to heat the energy storage battery water cooling plate (10).

7. An energy-saving thermal management system for energy storage according to any one of claims 1 to 5, characterized in that: The central control module (12) predicts the future daytime temperature based on the Internet of Things meteorological monitoring and forecasting system (24). When the future daytime temperature is higher than a preset degree, it is determined that the energy storage battery water cooling plate (10) needs to be cooled. The central control module (12) drives the inner circulation loop in advance at night under low temperature conditions based on the determination result. The coolant exchanges heat with the air through the heat exchanger (21) to reduce the coolant temperature. After the temperature reaches the predicted value at night, the inner circulation loop is closed to allow the coolant to remain in the insulation water tank (20) to achieve cold storage. During the day, according to the energy storage battery heating requirements, the outer circulation loop is driven to cool the energy storage battery water cooling plate (10) using the low-temperature coolant in the existing insulation water tank (20). If the cooling temperature and cooling amount are insufficient, the outer circulation loop is closed and the temperature management loop is driven to cool the energy storage battery water cooling plate (10).

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