Thermal management system and energy storage system

Abstract

The utility model relates to the technical field of energy storage systems, and discloses a thermal management system and an energy storage system.The thermal management system comprises an energy storage battery rack, the energy storage battery rack comprises a bottom plate, a top plate and heat exchange plates, and the heat exchange plates are arranged between the bottom plate and the top plate at equal intervals and matched with the bottom plate and the top plate to define a battery module containing space; the battery module in the battery module placing space is cooled or heated through the two adjacent heat exchange plates, each heat exchange plate comprises a U-shaped plate and a vertical plate which are arranged between the bottom plate and the top plate, and a coiled pipe which is positioned in a heat exchange cavity defined by the U-shaped plate and the vertical plate, and through the design of the heat exchange plates and the coiled pipes, the heat exchange efficiency is improved; the temperature in the battery module placing space is uniformly distributed, the heat exchange efficiency is improved, the temperature difference between the battery modules is effectively reduced, and the overall temperature control effect is optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage systems, and specifically relates to a thermal management system and an energy storage system. Background Art

[0002] The thermal management system in the energy storage system is used to adjust the temperature of the energy storage device, that is, to effectively control the temperature of the battery to ensure that the battery cell can work normally within the temperature range of 10-35 degrees Celsius. Thermal management in the energy storage system is very critical to ensure energy storage efficiency and life and ensure operational safety. Through an efficient thermal management system, energy storage equipment can be prevented from being damaged due to excessively high or low temperatures, thereby extending its service life and maintaining its optimal working performance.

[0003] Most of the thermal management systems of energy storage systems perform thermal management on the battery cells in the energy storage devices, but often ignore the temperature regulation of the energy storage battery racks and battery modules that cooperate with the battery modules. There may be large temperature unevenness between the battery modules, causing some battery modules to be too high or too low, affecting the overall working efficiency and stability of the system. Due to uneven temperature, some battery modules may be overheated or overcooled, which may shorten the life of the battery modules and reduce the overall life of the energy storage system. Excessive temperature may cause the battery module to overheat or even thermal runaway, resulting in safety hazards, requiring timely temperature control and adjustment.

[0004] In summary, for the thermal management of the energy storage system, in addition to the thermal management of the battery cells in the energy storage device, the temperature regulation of the energy storage battery rack and the battery module that cooperate with the battery module should also be fully considered to ensure that the temperature control of the entire system is more uniform and stable, so as to improve the system's working efficiency, extend the battery life, and ensure the safe operation of the system. To this end, we propose a thermal management system and energy storage system to solve the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, the utility model proposes a thermal management system and an energy storage system.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A thermal management system includes an energy storage battery rack, wherein the energy storage battery rack includes a bottom plate, a top plate, and heat exchange plates arranged equidistantly between the bottom plate and the top plate and cooperating with the bottom plate and the top plate to form a battery module placement space, wherein a battery module in the battery module placement space is cooled or heated by two adjacent heat exchange plates.

[0008] Preferably, the thermal management system also includes a heat pump, a heat exchanger, a water pump and an intelligent controller. The heat pump is connected to the heat exchanger through a refrigerant pipe. The water outlet pipe A of the heat exchanger is connected to the water inlet of the water pump. The water outlet pipe B of the water pump is connected to the water outlet pipeline through a three-way valve A. A number of three-way valves B connected to the water inlet of the heat exchange plate are evenly distributed on the water outlet pipeline. The return pipe A of the heat exchanger is connected to the return pipeline through a three-way valve C. A number of three-way valves D connected to the water outlet of the heat exchange plate are evenly distributed on the return pipeline.

[0009] The thermal management system is combined with the traditional battery cell thermal management system, that is, the water outlet pipe shell of the water pump is divided into two routes, one leading to the battery cell thermal management system and the other leading to the heat exchange plate, and the return pipe in the battery cell thermal management system is combined with the return pipe through the heat exchange plate to the return pipe A of the heat exchanger. In this way, the energy storage system has both a thermal management system for battery cell thermal management and a thermal management system for battery modules.

[0010] By merging the two thermal management systems, comprehensive temperature control of the battery cells and battery modules can be achieved, ensuring that the temperature of the entire energy storage system remains within the optimal range. The merged thermal management system can more effectively utilize the coolant, reduce coolant waste, and improve the overall efficiency of the system. By merging the systems, the temperature of the entire energy storage system can be better monitored and managed, abnormal situations can be discovered and handled in a timely manner, and the safety of the system can be improved.

[0011] Preferably, the heat exchange plate comprises a U-shaped plate and a vertical plate arranged between the bottom plate and the top plate, and a serpentine tube located in a heat exchange chamber surrounded by the U-shaped plate and the vertical plate.

[0012] Preferably, the water inlet of the serpentine pipe is connected to the water outlet pipeline, and the water outlet of the serpentine pipe is connected to the return pipeline.

[0013] Preferably, the energy storage battery rack is equipped with a sealing plate encapsulated outside the battery module placement space, the sealing plate is evenly distributed with heat dissipation holes, and each sealing plate is provided with three temperature transmitters for monitoring the battery module temperature arranged equidistantly from top to bottom.

[0014] The three temperature transmitters are arranged at equal distances, which can monitor the temperature distribution at different positions of the battery module, helping to understand the overall temperature status of the battery module more accurately.

[0015] Preferably, the temperature of the battery module is monitored and sent to an intelligent controller, which controls the working states of the heat pump, heat exchanger and water pump according to the set temperature to achieve precise control of the battery module temperature and adapt to different temperature control requirements.

[0016] An energy storage system comprises the above-mentioned thermal management system.

[0017] Preferably, the energy storage system further includes an energy storage cabinet and an inverter arranged in the energy storage cabinet for converting DC power into AC power or converting AC power into DC power.

[0018] Integrating the thermal management system and the inverter into the energy storage cabinet can reduce the footprint and improve the compactness and integration of the energy storage system. The energy storage cabinet can provide a closed space for the thermal management system and the inverter, protecting the components from the external environment and improving the safety of the system.

[0019] Preferably, a mounting frame for mounting an energy storage battery rack is fixedly provided in the energy storage cabinet, and the heat pump, heat exchanger and water pump are all fixedly installed on the top of the mounting frame to facilitate maintenance and overhaul. A cooling fan is also provided on the top of the mounting frame to help dissipate heat and ensure that the internal components operate at a suitable temperature.

[0020] Compared with the prior art, the technical effects and advantages of the utility model are:

[0021] The thermal management system and energy storage system achieve uniform temperature distribution in the battery module placement space through the design of heat exchange plates and serpentine tubes, improve heat exchange efficiency, effectively reduce temperature differences between battery modules, and optimize the overall temperature control effect.

[0022] Merging the thermal management system with the traditional battery cell thermal management system can achieve comprehensive temperature control of battery cells and battery modules, improve the overall efficiency and safety of the system, and save energy resources.

[0023] The system's operating status is monitored and controlled in real time through temperature transmitters, intelligent controllers and other equipment, and the operating modes of components such as heat pumps, heat exchangers and water pumps are adjusted as needed to reduce energy waste, extend battery life and improve system safety. The system integrates a variety of safety protection designs, such as monitoring battery module temperature and real-time control of operating status, to ensure the safety and stability of the entire energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a first perspective view of the thermal management system of the utility model;

[0025] Figure 2 This is a second viewing angle diagram of the thermal management system of the utility model;

[0026] Figure 3 For this utility model Figure 1 Schematic diagram of the structure after the battery rack of the energy storage system is removed;

[0027] Figure 4 This is an exploded view of the heat exchange plate of the utility model;

[0028] Figure 5It is a structural schematic diagram of the energy storage system of the utility model.

[0029] In the figure: 1. Energy storage battery rack; 101. Bottom plate; 102. Top plate; 103. Battery module placement space; 104. Heat exchange plate; 105. U-shaped plate; 106. Vertical plate; 107. Serpentine pipe; 2. Heat exchanger; 3. Water pump; 4. Heat pump; 5. Water outlet pipe A; 6. Water outlet pipe B; 7. Three-way valve A; 8. Water outlet pipeline; 9. Three-way valve B; 10. Return pipe A; 11. Three-way valve C; 12. Return pipeline; 13. Three-way valve D; 14. Sealing plate; 15. Heat dissipation hole; 16. Temperature transmitter; 17. Energy storage cabinet; 18. Installation frame; 19. Cooling fan. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The following is combined with Figure 1-5 To further explain this application in detail,

[0032] The embodiment of the present application discloses a thermal management system, including an energy storage battery rack 1, wherein the energy storage battery rack 1 includes a bottom plate 101, a top plate 102, and heat exchange plates 104 arranged equidistantly between the bottom plate 101 and the top plate 102 and cooperating with the bottom plate 101 and the top plate 102 to form a battery module placement space 103, and the battery modules in the battery module placement space 103 are cooled or heated by two adjacent heat exchange plates 104.

[0033] The design of the heat exchange plate 104 ensures that the temperature in the battery module placement space 103 is more uniform, which helps to reduce the temperature difference between the battery modules and improve the overall temperature control effect of the system. The heat exchange plate 104 can effectively absorb the heat generated by the battery module and transfer the heat through the heat exchange between two adjacent heat exchange plates 104 to achieve efficient heat dissipation. The heat exchange between the heat exchange plates 104 reduces the energy consumption of external cooling or heating equipment, thereby achieving energy saving. The design of the heat exchange plate 104 makes it more convenient to adjust the temperature of the battery module placement space 103, which helps to improve the maintenance efficiency of the system and reduce maintenance costs. Through effective temperature control, the safety risks caused by overheating or overcooling of the battery module are reduced, thereby improving the overall safety of the system.

[0034] The thermal management system also includes a heat pump 4, a heat exchanger 2, a water pump 3 and an intelligent controller. The heat pump 4 is connected to the heat exchanger 2 through a refrigerant pipeline. The outlet pipe A5 of the heat exchanger 2 is connected to the water inlet of the water pump 3. The outlet pipe B6 of the water pump 3 is connected to the outlet pipeline 8 through a three-way valve A7. The outlet pipeline 8 is evenly provided with a plurality of three-way valves B9 connected to the water inlet of the heat exchange plate 104. The return pipe A10 of the heat exchanger 2 is connected to the return pipeline 12 through a three-way valve C11. The return pipeline 12 is evenly provided with a plurality of three-way valves D13 connected to the water outlet of the heat exchange plate 104.

[0035] The thermal management system is combined with the traditional battery cell thermal management system, that is, the water outlet pipe 8 of the water pump 3 is divided into two paths, one leading to the battery cell thermal management system, and the other leading to the heat exchange plate 104, and the return pipe in the battery cell thermal management system is combined with the return pipe 12 passing through the heat exchange plate 104 to the return pipe A10 of the heat exchanger 2. In this way, the energy storage system has both a thermal management system for battery cell thermal management and a thermal management system for battery modules;

[0036] By merging the two thermal management systems, comprehensive temperature control of the battery cells and battery modules can be achieved, ensuring that the temperature of the entire energy storage system remains within the optimal range. The merged thermal management system can more effectively utilize the coolant, reduce coolant waste, and improve the overall efficiency of the system. By merging the systems, the temperature of the entire energy storage system can be better monitored and managed, abnormal situations can be discovered and handled in a timely manner, and the safety of the system can be improved.

[0037] like Figure 4 As shown, the heat exchange plate 104 includes a U-shaped plate 105 and a vertical plate 106 disposed between the bottom plate 101 and the top plate 102 , and a serpentine tube 107 located in a heat exchange chamber surrounded by the U-shaped plate 105 and the vertical plate 106 .

[0038] The serpentine tube 107 is arranged in the heat exchange chamber surrounded by the U-shaped plate 105 and the vertical plate 106, which can effectively guide the coolant to flow in the heat exchange chamber. The design of the serpentine tube 107 increases the contact area between the coolant and the heat exchange plate 104, thereby improving the heat exchange efficiency. The layout of the serpentine tube 107 in the heat exchange chamber helps the coolant to form a uniform flow in the heat exchange chamber, thereby achieving a uniform temperature distribution in the battery module placement space 103, and improving the overall temperature control effect of the system. The design of the serpentine tube 107 helps to reduce the resistance of the coolant during flow, increase the flow speed of the coolant in the heat exchange chamber, thereby improving the heat dissipation efficiency. The design of the U-shaped plate 105 and the vertical plate 106 makes the structure of the heat exchange plate 104 more compact, saves space, and is convenient for installation and layout in the energy storage battery rack 1.

[0039] like Figure 3As shown, the water inlet of the serpentine tube 107 is connected to the water outlet pipeline 8 , and the water outlet of the serpentine tube 107 is connected to the return pipeline 12 .

[0040] like Figure 2 As shown, the energy storage battery rack 1 is equipped with a sealing plate 14 encapsulated outside the battery module placement space 103, and the sealing plate 14 is evenly distributed with heat dissipation holes 15. Each sealing plate 14 is arranged with three temperature transmitters 16 for monitoring the temperature of the battery module at equal distances from top to bottom.

[0041] By installing multiple temperature transmitters 16 on each sealing plate 14, the temperature of the battery module can be monitored in real time to ensure that the battery module operates within a safe temperature range. The three temperature transmitters 16 are arranged at equal distances to monitor the temperature distribution at different positions of the battery module, which helps to more accurately understand the overall temperature status of the battery module. The heat dissipation holes 15 on the sealing plate 14 allow air circulation, which helps to dissipate heat and improve the efficiency of the thermal management system of the battery module.

[0042] The temperature of the battery module is monitored and sent to the intelligent controller, and the intelligent controller controls the working states of the heat pump 4, the heat exchanger 2, and the water pump 3 according to the set temperature.

[0043] The intelligent controller can automatically adjust the working status of the heat pump 4, heat exchanger 2, and water pump 3 according to the monitored temperature data, realize precise control of the battery module temperature, and adapt to different temperature control requirements. Through intelligent control, unnecessary energy waste can be avoided, the system's working efficiency can be improved, and the battery life can be extended. The use of the intelligent controller can respond to abnormal changes in the battery module temperature in a timely manner, take measures to avoid overheating or overcooling, and improve the safety of the system. The intelligent controller can record and analyze temperature data to help maintenance personnel understand the operating status of the system, which is convenient for maintenance and troubleshooting.

[0044] like Figure 5 As shown, an energy storage system includes the above-mentioned thermal management system.

[0045] The energy storage system further includes an energy storage cabinet 17 and an inverter arranged in the energy storage cabinet 17 for converting DC power into AC power or converting AC power into DC power.

[0046] Integrating the thermal management system and the inverter into the energy storage cabinet 17 can reduce the floor space and improve the compactness and integration of the energy storage system. The energy storage cabinet 17 can provide a closed space for the thermal management system and the inverter, protect the components from the external environment, and improve the safety of the system.

[0047] The energy storage cabinet 17 is fixedly provided with an installation frame 18 for installing the energy storage battery rack 1. The heat pump 4, the heat exchanger 2, and the water pump 3 are all fixedly installed on the top of the installation frame 18 for easy maintenance and repair. A cooling fan 19 is also provided on the top of the installation frame 18.

[0048] The provision of the cooling fan 19 can enhance the heat exchange efficiency of the chamber where the heat pump 4, the heat exchanger 2, and the water pump 3 are located inside the energy storage cabinet 17, help dissipate heat, and ensure that the internal components operate at a suitable temperature.

[0049] Installing components such as the heat pump 4, the heat exchanger 2, and the water pump 3 on the top of the installation frame 18 is beneficial to the layout of the cooling fan 19 and improves the heat dissipation effect. In addition, the installation frame 18 can separate the heat pump 4, the heat exchanger 2, the water pump 3 from the heat exchange plate 104 and the battery module, reducing mutual interference between components and helping to improve the independence and stability of each component. The separation of components helps to reduce the risk of poor contact or damage between components due to factors such as thermal expansion and vibration, thereby improving the safety of the system. The separation of components helps to reduce the impact of the external environment on each component and improves the environmental adaptability of the system.

[0050] The cooling process of the thermal management system, energy storage system and battery module is as follows:

[0051] When the temperature transmitter 16 detects that the temperature of the battery module is higher than 40°C, the thermal management system automatically starts, and the heat pump 4 enters the cooling mode. The refrigerant absorbs the heat of the ethylene glycol solution in the heat exchanger 2, and the temperature of the ethylene glycol solution decreases. The low-temperature ethylene glycol solution flows into the heat exchange plate 104 outside the battery module through the water pump 3 to absorb the heat of the battery module. The temperature of the battery module drops, and the ethylene glycol solution absorbs the heat of the battery module, and the temperature rises accordingly. It is sent back to the heat exchanger 2 through the return line 12 to continue cooling and cooling. This cycle continues until the temperature of the battery module is 35°C, and the thermal management system stops working;

[0052] The heating process of the battery module is as follows:

[0053] When the temperature transmitter 16 detects that the temperature of the battery module is lower than 10°C, the thermal management system is automatically turned on, and the heat pump 4 enters the heating mode. The high-temperature refrigerant heats the ethylene glycol solution in the heat exchanger 2. As a result, the temperature of the ethylene glycol solution rises, and the high-temperature ethylene glycol solution flows into the heat exchange plate 104 outside the battery module through the water pump 3 to heat the battery module. The temperature of the battery module rises, and the temperature of the ethylene glycol solution decreases after the heat is absorbed by the battery module. The solution is sent back to the heat exchanger 2 through the reflux pipe 12 for continued heating, and the temperature rises again in this cycle until the temperature of the battery module reaches 15°C, at which time the thermal management system stops working.

[0054] In the thermal management system and energy storage system, the heat pump 4 adjusts the temperature of the ethylene glycol solution by circulating the refrigerant, thereby cooling or heating the battery module. The refrigerant absorbs or releases heat in the heat exchanger 2, causing the temperature of the ethylene glycol solution to increase or decrease accordingly. The water pump 3 sends the ethylene glycol solution to the heat exchange plate 104 placed next to the battery module, and the temperature of the battery module is regulated by heat exchange between the heat exchange plate 104 and the battery module.

[0055] The temperature transmitter 16 monitors the temperature of the battery module and controls the working state of the thermal management system according to the set temperature range. When the temperature exceeds the set range, the system starts the cooling mode; when the temperature is lower than the set range, the system starts the heating mode. The intelligent controller coordinates and controls the heat pump 4, heat exchanger 2, water pump 3 and other components to ensure that the system can operate stably and efficiently.

[0056] The design of the ethylene glycol solution circulation pipeline and the layout of the serpentine tube 107 in the heat exchange plate 104 are both to maximize the heat exchange efficiency, so that the temperature of the battery module can be quickly adjusted to the set range to ensure the safety and stable performance of the battery. The working principle of the entire system also reflects the characteristics of energy saving and environmental protection. Through cooling and heating, the temperature of the battery module is accurately controlled, which improves the overall performance of the system.

[0057] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermal management system, comprising an energy storage battery rack (1), characterized in that: The energy storage battery rack (1) comprises a bottom plate (101), a top plate (102), and heat exchange plates (104) arranged at equal distances between the bottom plate (101) and the top plate (102) and cooperating with the bottom plate (101) and the top plate (102) to form a battery module placement space (103); a battery module in the battery module placement space (103) is cooled or heated by two adjacent heat exchange plates (104).

2. A thermal management system according to claim 1, characterized in that: The invention also comprises a heat pump (4), a heat exchanger (2), a water pump (3) and an intelligent controller. The heat pump (4) is connected to the heat exchanger (2) via a refrigerant pipeline. The water outlet pipe A (5) of the heat exchanger (2) is connected to the water inlet of the water pump (3). The water outlet pipe B (6) of the water pump (3) is connected to the water outlet pipeline (8) via a three-way valve A (7). The water outlet pipeline (8) is evenly provided with a plurality of three-way valves B (9) connected to the water inlet of the heat exchange plate (104). The return pipe A (10) of the heat exchanger (2) is connected to the return pipeline (12) via a three-way valve C (11). The return pipeline (12) is evenly provided with a plurality of three-way valves D (13) connected to the water outlet of the heat exchange plate (104).

3. A thermal management system according to claim 2, characterized in that: The heat exchange plate (104) comprises a U-shaped plate (105) and a vertical plate (106) arranged between the bottom plate (101) and the top plate (102), and a serpentine tube (107) located in a heat exchange chamber surrounded by the U-shaped plate (105) and the vertical plate (106).

4. A thermal management system according to claim 3, characterized in that: The water inlet of the serpentine tube (107) is connected to the water outlet pipeline (8), and the water outlet of the serpentine tube (107) is connected to the return pipeline (12).

5. A thermal management system according to claim 2, characterized in that: The energy storage battery rack (1) is provided with a sealing plate (14) encapsulated outside the battery module placement space (103), the sealing plate (14) is evenly distributed with heat dissipation holes (15), and each sealing plate (14) is provided with three temperature transmitters (16) for monitoring the temperature of the battery module arranged at equal distances from top to bottom.

6. A thermal management system according to claim 5, characterized in that: The temperature of the battery module is monitored and sent to the intelligent controller, and the intelligent controller controls the working state of the heat pump (4), the heat exchanger (2), and the water pump (3) according to the set temperature.

7. An energy storage system, characterized in that: The energy storage system comprises the thermal management system according to any one of claims 1-6.

8. An energy storage system according to claim 7, characterized in that: It also includes an energy storage cabinet (17) and an inverter arranged in the energy storage cabinet (17) and used for converting direct current power into alternating current power or converting alternating current power into direct current power.

9. An energy storage system according to claim 8, characterized in that: The energy storage cabinet (17) is fixedly provided with an installation frame (18) for installing the energy storage battery rack (1); the heat pump (4), the heat exchanger (2), and the water pump (3) are all fixedly installed on the top of the installation frame (18); and a heat dissipation fan (19) is also provided on the top of the installation frame (18).

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