Energy-saving heat management system for energy storage

Abstract

The utility model 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 with the cooling-water machine, and 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] This utility model relates to the field of thermal management system technology, and in particular to an energy-saving thermal management system for energy storage. Background Technology

[0002] With the vigorous development and widespread application of clean energy globally, energy storage systems are becoming increasingly important as a key component in ensuring stable energy supply and improving energy efficiency. Among various energy storage systems, battery energy storage has become one of the most widely used energy storage methods due to its high energy density and flexible charge / discharge characteristics.

[0003] For battery energy storage systems, battery performance, lifespan, and safety largely depend on their operating temperature environment. A suitable operating temperature range ensures high charge and discharge efficiency, extends battery life, and effectively reduces safety risks such as thermal runaway. Therefore, an efficient and precise thermal management system is an indispensable component of energy storage systems. Currently, liquid-cooled thermal management is widely used in energy storage systems due to its excellent heat dissipation capabilities, good temperature uniformity, and convenient scalability.

[0004] In a conventional liquid-cooled thermal management system, the chiller, as the core temperature control device, typically operates based on the real-time temperature of the battery. When the battery temperature exceeds the preset upper limit of the suitable temperature range, the chiller activates its cooling function, absorbing the heat generated by the battery through circulating coolant to lower the battery temperature to a reasonable range. Conversely, when the battery temperature falls below the preset lower limit of the suitable temperature range, especially in cold environments, the chiller activates its heating function, heating the coolant to raise the battery temperature and ensure that the battery operates within the appropriate temperature range.

[0005] However, in regions with significant diurnal temperature variations, the liquid-cooled thermal management of energy storage systems faces severe challenges. Due to drastic changes in ambient temperature between day and night, battery temperatures fluctuate wildly within a short period, requiring chillers to frequently switch between cooling and heating functions. This frequent switching not only places extremely high demands on the chiller's control system in terms of response speed and stability, increasing the complexity and error probability of the control algorithm, but also subjectes internal mechanical components such as compressors and valves to frequent start-stop shocks, significantly shortening equipment lifespan and increasing maintenance costs. Furthermore, in areas with large diurnal temperature variations, chiller units often need to operate continuously for extended periods to maintain suitable battery temperatures. This undoubtedly further exacerbates equipment wear, reduces system reliability, and significantly increases energy consumption, contradicting the goal of energy storage systems to achieve high efficiency and energy conservation.

[0006] In summary, existing liquid-cooled thermal management systems for energy storage systems in areas with large diurnal temperature variations suffer from problems such as frequent chiller switching and prolonged operation. Therefore, there is an urgent need 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. Utility Model Content

[0007] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0008] An energy-saving thermal management system for energy storage includes an energy storage battery water-cooled plate, a chiller, and a central control module connected to the chiller. The energy storage battery water-cooled plate and the chiller are connected to form a temperature management loop. The system is characterized by further including an energy-saving management system, which includes an insulated water tank, a heat exchanger, an internal circulating water pump, an external circulating water pump, and an Internet of Things (IoT) meteorological monitoring and forecasting system. The internal circulating water pump, the external circulating water pump, and the IoT meteorological monitoring and forecasting system are electrically connected to the central control module.

[0009] The energy storage battery water-cooling plate, external circulating water pump and insulated water tank are connected to form an external circulating loop, and the heat exchanger, internal circulating water pump and insulated water tank are connected to form an internal circulating loop.

[0010] Preferably, the energy-saving thermal management system for energy storage also includes multiple electrically controlled valves that are 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.

[0011] Preferably, the electrically controlled valve includes a first valve, a second valve, a third valve, and a fourth valve. The first valve is connected in series in the temperature management circuit. The second valve is connected to the external circulating water pump and then connected in parallel with the first valve and the chiller. The internal circulation circuit has branch ends between the internal circulating water pump and the insulated water tank, and between the insulated water tank and the heat exchanger. The internal circulation circuit is connected in series in the temperature management circuit through two branch ends. The third valve is connected in series between the branch end and the insulated water tank, and the fourth valve is connected in series between the branch end and the heat exchanger.

[0012] Preferably, the first valve, the second valve, the third valve, and the fourth valve are all solenoid valves.

[0013] Preferably, the water-cooling plate of the energy storage battery is made of aluminum.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By leveraging the Internet of Things (IoT) meteorological monitoring and forecasting system, day-night temperature changes can be predicted in advance. During periods of suitable temperature, the natural environment can be used to heat or cool the coolant, and the heat or cold energy can be stored in an insulated water tank. This greatly reduces the large amount of electricity consumed by the chiller in areas with large day-night temperature differences due to frequent switching between heating and cooling functions and long-term operation, which is in line with the goal of energy storage systems to pursue high efficiency and energy saving.

[0016] By pre-storing heat and cold energy, the frequency of chiller usage is significantly reduced. When heating is needed at night or cooling is needed during the day, the heat or cold energy stored in the insulated water tank is utilized first, and the chiller is only activated when the heat or cold energy is insufficient. This greatly reduces the number of start-ups and shutdowns of the chiller's internal mechanical components, effectively extending the chiller's lifespan and reducing equipment maintenance costs. In addition, this system reduces the number of chiller function switching operations, lowering the complexity and error probability of the control system. At the same time, the insulated water tank acts as a buffer during thermal management, making the temperature regulation of the energy storage battery's water-cooled plate more stable and avoiding adverse effects on battery performance and lifespan caused by rapid temperature changes, thereby improving the stability and reliability of the entire energy storage system.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the waterway connection of this utility model;

[0020] Figure 2 This is a block diagram of a circuit connection module of this utility model;

[0021] Figure 3 This is another circuit connection module block diagram of this utility model.

[0022] The reference numerals and names in the figure are as follows:

[0023] Energy storage battery water-cooled plate 10, chiller 11, central control module 12, insulated water tank 20, heat exchanger 21, internal circulating water pump 22, external circulating water pump 23, Internet of Things meteorological monitoring and forecasting system 24, branch terminal 25, electrically controlled valve 30, first valve 31, second valve 32, third valve 33, fourth valve 34. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Please see Figure 1-3 In this embodiment of the utility model, an energy-saving thermal management system for energy storage includes an energy storage battery water-cooled plate 10, a chiller 11, and a central control module 12 connected to the chiller 11. The energy storage battery water-cooled plate 10 and the chiller 11 are connected to form a temperature management loop. The system is characterized by further including an energy-saving management system, which includes an insulated water tank 20, a heat exchanger 21, an internal circulating water pump 22, an external circulating water pump 23, and an Internet of Things (IoT) meteorological monitoring and forecasting system 24. The internal circulating water pump 22, the external circulating water pump 23, and the IoT meteorological monitoring and forecasting system 24 are electrically connected to the central control module 12.

[0026] The energy storage battery water-cooling plate 10, the external circulating water pump 23 and the insulated water tank 20 are connected to form an external circulating loop, and the heat exchanger 21, the internal circulating water pump 22 and the insulated water tank 20 are connected to form an internal circulating loop.

[0027] In the above technical solution, by selecting a mode, the central control module 12 can forecast the temperature of the day or night in the future 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 Internet of Things technology to realize real-time monitoring and forecasting of meteorological data, highlighting the Internet of Things connectivity characteristics and meteorological business functions of the system.

[0028] When the central control module 12 forecasts the future nighttime temperature based on the IoT meteorological monitoring and forecasting system 24, if the future nighttime temperature is lower than the preset value, it determines that the energy storage battery water-cooled plate 10 needs to be heated. Based on the determination result, the central control module 12 drives the internal circulation loop in advance under the high temperature of the daytime. The coolant exchanges heat with the air through the heat exchanger 21, causing the coolant temperature to rise. After the temperature reaches the predicted value for the daytime, the internal circulation loop is closed, allowing the coolant to remain in the insulated water tank 20 to achieve heat storage. At night, depending on the heating needs of the energy storage battery, the external circulation loop is driven, using the high-temperature coolant in the existing insulated water tank 20 to heat the energy storage battery water-cooled plate 10. If the heating temperature and heat are insufficient, the external circulation loop is closed, and the temperature management loop is driven to heat the energy storage battery water-cooled plate 10.

[0029] When the central control module 12 forecasts the future daytime temperature based on the IoT meteorological monitoring and forecasting system 24, if the future daytime temperature is higher than the preset value, it determines that the energy storage battery water-cooled plate 10 needs to be cooled. Based on the determination result, the central control module 12 drives the internal circulation loop in advance under the low temperature conditions at night. The coolant exchanges heat with the air through the heat exchanger 21, causing the coolant temperature to drop. After the temperature reaches the nighttime predicted value, the internal circulation loop is closed, allowing the coolant to remain in the insulated water tank 20 to achieve cold storage. During the day, depending on the heating needs of the energy storage battery, the external circulation loop is driven, using the existing low-temperature coolant in the insulated water tank 20 to cool the energy storage battery water-cooled plate 10. If the cooling temperature and cooling capacity are insufficient, the external circulation loop is closed, and the temperature management loop is driven to cool the energy storage battery water-cooled plate 10.

[0030] Through the above technical solution, the system can use the Internet of Things meteorological monitoring and forecasting system 24 to predict the changes in day and night temperatures in advance, and use the natural environment to heat or cool the coolant during suitable temperature periods, and store the heat or cold in the insulated water tank 20; for example, when the daytime temperature is high, it stores heat to heat the energy storage battery water cooling plate 10 at night, and when the nighttime temperature is low, it stores cold to cool the energy storage battery water cooling plate 10 during the day; this greatly reduces the large amount of electricity consumed by the chiller 11 in areas with large day-night temperature differences due to frequent switching of heating and cooling functions and long-term operation, which is in line with the goal of energy storage systems to pursue high efficiency and energy saving;

[0031] In traditional systems, the frequent function switching and prolonged operation of the chiller 11 cause severe start-stop shocks and excessive wear to its internal mechanical components, such as compressors and valves. This system, however, significantly reduces the frequency of chiller 11 usage by pre-storing heat and cold energy. When heating is needed at night or cooling is needed during the day, the system prioritizes utilizing the heat or cold energy stored in the insulated water tank 20, only starting the chiller 11 when the heat or cold energy is insufficient. This drastically reduces the number of start-stop cycles for the internal mechanical components of the chiller 11, effectively extending its service life and reducing equipment maintenance costs. Furthermore, this system reduces the number of function switching cycles of the chiller 11, lowering the complexity and error probability of the control system. Simultaneously, the insulated water tank 20 acts as a buffer during thermal management, making the temperature regulation of the energy storage battery water-cooled plate 10 more stable and avoiding adverse effects on battery performance and lifespan caused by rapid temperature changes, thereby improving the stability and reliability of the entire energy storage system.

[0032] Based on the IoT meteorological monitoring and forecasting system 24, the heating and cooling process of the coolant can be planned in advance, and the temperature of the water-cooled plate 10 of the energy storage battery can be precisely controlled according to the actual temperature changes in the future. When heating with heat storage coolant at night or cooling with cold storage coolant during the day, the flow rate and temperature of the coolant in the external circulation loop can be precisely adjusted according to the real-time temperature requirements of the energy storage battery, ensuring 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.

[0033] Furthermore, the various components in the energy management system, such as the insulated water tank 20, heat exchanger 21, internal circulating water pump 22, and external circulating water pump 23, are relatively independent and easy to expand. For energy storage systems of different sizes and regions with different temperature variation characteristics, the specifications, quantity, or control parameters of the components can be adjusted to flexibly adapt to various application scenarios. For example, in cases where the temperature difference between day and night is greater or the number of energy storage batteries is more, 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.

[0034] Please refer to Figure 1-3 Based on the above technical solution, it is further proposed that the energy-saving thermal management system for energy storage also includes multiple electrically controlled valves 30 electrically connected to the central control module 12. The external circulation loop and the internal circulation loop are integrated into 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 in 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 has 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 two branch ends 25. The third valve 33 is connected in series between the branch end 25 and the insulated water tank 20. The fourth valve 34 is connected in series between the branch end 25 and the heat exchanger 21.

[0035] During nighttime heating, when the IoT weather monitoring and forecasting system 24 predicts that the nighttime temperature will be lower than the preset value, the central control module 12 determines that the energy storage battery water-cooled plate 10 needs to be heated. During the daytime high temperature, the central control module 12 drives the internal circulation loop. At this time, the fourth valve 34 and the third valve 33 open, the internal circulation water pump 22 works, and 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 predicted value for the daytime, the internal circulation water pump 22, the third valve 33, and the fourth valve 34 are closed, and the coolant remains in the insulation tank 20. The insulated 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 operates. 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 is running 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, and starts the chiller 11 to heat the energy storage battery water-cooled plate 10 through the temperature management loop.

[0036] During nighttime heating, if the predicted daytime temperature is higher than the preset value, it is determined that the energy storage battery water-cooling plate 10 needs cooling. At nighttime low temperatures, the central control module 12 drives the internal circulation loop. At this time, the third valve 33 and the fourth valve 34 open, the internal circulation water pump 22 operates, and coolant flows from the insulated water tank 20, passing through the third valve 33 and the fourth valve 34 into the heat exchanger 21 to exchange heat with the air, causing the temperature to drop. After reaching the predicted nighttime value, the internal circulation water pump 22, the third valve 33, and the fourth valve 34 are closed, and the coolant remains in the insulated water tank 20 for cold storage. 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 operates. The low-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 is running to cool the energy storage battery water-cooled plate 10. If the cooling temperature and cooling capacity are insufficient, the central control module 12 closes the second valve 32, opens the first valve 31, and starts the chiller 11 to cool the energy storage battery water-cooled plate 10 through the temperature management loop.

[0037] Through the precise control of multiple electronically controlled valves 30, the internal circulation loop, external circulation loop, and temperature management loop can be flexibly switched and work together. Under different operating 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 best temperature control mode.

[0038] The electronically controlled valve 30 allows the system to flexibly choose whether to utilize the heat or cold stored in the insulated water tank 20 or activate the chiller 11 for temperature regulation, based on actual temperature requirements and energy storage conditions. For example, when heat or cold is sufficient, the system can rely entirely on the external circulation loop to utilize the coolant in the insulated water tank 20. When heat or cold is insufficient, the system can promptly switch to the temperature management loop to activate the chiller 11, greatly enhancing the system's flexibility in responding to complex temperature changes and different energy storage battery thermal management needs.

[0039] Furthermore, precise control of the electrically controlled valve 30 avoids unnecessary energy consumption. When the natural environment can be used for cooling or heat storage of the coolant, the connection with the chiller 11 can be cut off by the electrically controlled valve 30, 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 conservation in energy storage systems. This reasonable control of the electrically controlled valve 30 reduces the frequent start-stop and overload operation of key equipment such as the chiller 11, making the equipment operation more stable, reducing the risk of equipment failure due to frequent operation, improving the reliability and stability of the entire thermal management system, and reducing maintenance costs and downtime.

[0040] Based on the above technical solutions, 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 this 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 rapid response and precise control. They can act instantly when the working conditions change, quickly adjust the coolant circulation path, improve the system response and temperature control accuracy, and are easy to automate. They can cooperate with the central control module 12 to realize the automated operation of the system, reducing labor costs and failure risks. The energy storage battery water cooling plate 10 is made of aluminum material. With the excellent thermal conductivity of aluminum, it can efficiently transfer heat or cold, ensuring that the battery works at a suitable temperature, improving battery performance and life. It is lightweight and has high strength, which is conducive to installation and transportation, reducing costs. It also has good corrosion resistance due to the formation of a dense oxide film on its surface, preventing coolant erosion, reducing leakage risks, ensuring the long-term stable operation of the thermal management system, and reducing maintenance costs.

[0041] 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 exemplary 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.

Claims

1. An energy-saving thermal management system for energy storage, comprising a water-cooled plate (10) for an energy storage battery, a chiller (11), and a central control module (12) connected to the chiller (11), wherein the water-cooled plate (10) for the energy storage battery and the chiller (11) are connected to form a temperature management loop, characterized in that, It also includes an energy-saving management system, which includes an insulated water tank (20), a heat exchanger (21), an internal circulating water pump (22), an external circulating water pump (23), and an Internet of Things meteorological monitoring and forecasting system (24). The internal circulating water pump (22), the external circulating 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 heat preservation water tank (20) are connected to form an external circulation loop, and the heat exchanger (21), the internal circulation water pump (22) and the heat preservation 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 also includes multiple electrically controlled valves (30) that are electrically connected to the central control module (12). The external circulation loop and the internal circulation loop are integrated into the temperature management loop through the electrically controlled valves (30).

3. The energy-saving thermal management system for energy storage according to claim 2, characterized in that, The electrically controlled valve (30) includes 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 in the temperature management circuit. The second valve (32) is connected to the external circulating water pump (23) and then connected in parallel with the first valve (31) and the chiller (11). The internal circulation circuit has branch ends (25) between the internal circulating water pump (22) and the insulated water tank (20) and between the insulated water tank (20) and the heat exchanger (21). The internal circulation circuit is connected in series in the temperature management circuit through two branch ends (25). The third valve (33) is connected in series between the branch end (25) and the insulated water tank (20). 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.

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