High-capacity energy storage system based on liquid-cooled battery module

Abstract

The invention discloses a high-capacity energy storage system based on a liquid-cooled battery module. The high-capacity energy storage system comprises a cabinet body, the liquid-cooled battery modules are uniformly arranged at one end of the inner side of the cabinet body and are used for providing electric energy; the module high-voltage box is arranged above one end of the inner side of the cabinet body, the module high-voltage box is connected with the liquid-cooled battery module in parallel, and the module high-voltage box is used for distributing the electric quantity of the liquid-cooled battery module; and the DC-to-AC output equipment is arranged below the module high-voltage box and is used for converting the direct current of the liquid-cooled battery module into alternating current. According to the high-capacity energy storage system based on the liquid-cooled battery module, the space utilization rate of the energy storage system is greatly optimized through the highly-integrated design, the occupied area of the whole system is greatly reduced, the strict requirements of commercial carriers and small factories for the occupied area of equipment are met, meanwhile, due to the fact that the water machine is adopted for dissipating heat of the liquid-cooled battery module, the energy storage efficiency is improved, and the energy storage cost is reduced. The system can dissipate heat efficiently.

Description

Technical Field

[0001] The present invention relates to the field of energy storage systems, and in particular to a high-capacity energy storage system based on a liquid-cooled battery module. Background Art

[0002] In the context of the current global energy structure transformation and the rapid development of smart grids, commercial carriers and small factories have an increasing demand for efficient, reliable and flexible energy storage systems. Traditional energy storage solutions are often limited by insufficient capacity, large footprint, low safety performance and poor environmental adaptability, making it difficult to meet the needs of these places for continuous power supply, energy conservation and emission reduction, and intelligent management. In particular, in the face of emergencies such as power fluctuations, grid failures or emergency power outages, the lack of effective emergency energy storage measures may lead to production interruptions, equipment damage and even safety hazards. In particular, for commercial facilities and small factories that require 24-hour uninterrupted operation or have extremely high data security requirements, existing energy storage systems often cannot simultaneously meet multiple requirements such as high energy density, rapid response, efficient heat dissipation, long life cycle and adaptability to harsh environments. In addition, traditional energy storage equipment also has many limitations in terms of safety protection, transportation convenience and customized services, which restricts its application and promotion in a wider range of scenarios.

[0003] Therefore, it is necessary to propose a high-capacity energy storage system based on liquid-cooled battery modules to solve the above problems. Summary of the invention

[0004] The main purpose of the present invention is to provide a high-capacity energy storage system based on a liquid-cooled battery module, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A high-capacity energy storage system based on a liquid-cooled battery module includes a cabinet;

[0007] Liquid-cooled battery modules, which are evenly arranged at one end of the inner side of the cabinet and are used to provide electrical energy;

[0008] A module high-voltage box is arranged above one end of the inner side of the cabinet, and the module high-voltage box is connected in parallel with the liquid-cooled battery module, and the module high-voltage box is used to distribute the power of the liquid-cooled battery module;

[0009] A DC to AC output device is provided below the high voltage box of the module and is used to convert the direct current of the liquid-cooled battery module into alternating current;

[0010] The circuit breaker isolating switch is installed below the DC to AC output device and is used to connect to the AC power supply side at the user end;

[0011] UPS backup power supply, installed in front of the DC to AC output device in the cabinet;

[0012] The water machine is arranged above the liquid-cooled battery module and is used to dissipate heat inside the cabinet;

[0013] An audible and visual alarm, which is arranged at one end of the top of the cabinet;

[0014] A display screen, which is arranged at one end of the front side of the cabinet;

[0015] An emergency stop button is arranged on the front side of the cabinet near the display screen;

[0016] The hydrogen blower is arranged on one side of the cabinet close to the liquid-cooled battery module;

[0017] The dehumidifier is arranged in the gap at the upper end of the liquid-cooled battery module.

[0018] Preferably, a pair of forklift holes are provided at the bottom of the cabinet.

[0019] Preferably, a fire hose is provided at one end of the bottom of the cabinet, and one end of the fire hose is used to connect to an external water source, and the other end extends in the inner gap of the cabinet, and a nozzle is provided on one end located on the inner side of the cabinet.

[0020] Preferably, a mesh cover frame corresponding to the water machine is provided on the side surface of the upper end of the cabinet, and a ventilation mesh cover for ventilation is provided in the mesh cover frame.

[0021] Preferably, a cleaning assembly is provided on the side of the ventilation mesh cover, and the cleaning assembly includes lifting rods arranged on the inner and outer sides of the ventilation mesh cover, and brush strips that fit the ventilation mesh cover are arranged on opposite sides of the two lifting rods, and through grooves are symmetrically provided at both ends of the mesh cover frame, and the through grooves are vertically movably connected with sealing sliders corresponding to the ends of the lifting rods, and the two ends of the sealing sliders are respectively fixedly connected to the opposite sides of the two lifting rods, and a screw rod is vertically rotated on the inner side of the ventilation mesh cover, and a motor for driving the screw rod to rotate is arranged at one end of the screw rod, and a lifting seat is fixedly provided on the lifting rod located on the inner side of the ventilation mesh cover, and the lifting seat is threadedly connected to the screw rod.

[0022] Preferably, a shielding assembly is provided on the inner side of the ventilation mesh cover, and the shielding assembly includes a containing box arranged on the upper end of the inner side of the mesh cover frame, the bottom of the containing box is open, and the inner side of the containing box is rotatably connected to a reel, a dustproof cloth adapted to the ventilation mesh cover is wound on the outer side of the reel, and the free end of the dustproof cloth is fixedly connected to the top of the lifting rod located on the inner side of the ventilation mesh cover, and a torsion spring for resetting the dustproof cloth is provided between the two ends of the reel and the inner wall of the containing box.

[0023] Preferably, bearing seats are provided at both upper and lower ends of the inner side of the mesh cover frame, both ends of the screw rod are rotatably connected to the two bearing seats, and the motor is provided on one side of one of the bearing seats.

[0024] Preferably, a sealing assembly is provided on the inner side of the through groove, and the sealing assembly includes grooves symmetrically arranged on both sides of the inner side of the through groove, and the grooves are movably connected with sealing strips, and a second spring is provided between one side of the sealing strip and the inner wall of the groove, and when the second spring is in the initial state, the two sealing strips in the same through groove are in contact with each other.

[0025] Preferably, sealing grooves are provided on the upper and lower ends of the sealing strip away from the second spring, the upper and lower ends of the sealing slider are conical, and the shape of the sealing slider and the sealing grooves on the two sealing strips is adapted.

[0026] Preferably, the inner edge of the mesh cover frame is provided with a pressing mechanism for pressing the edge of the dustproof cloth, and the pressing mechanism includes an "L"-shaped fixed plate arranged on the side of the mesh cover frame, and a guide rail is movably connected to the fixed plate, and an isosceles trapezoidal pressing piece is provided at one end of the guide rail close to the ventilation mesh cover, and a first spring is provided between the side of the guide rod close to the pressing piece and the side wall of the pressing piece, and a roller for rolling cooperation with the side wall of the pressing piece is rotatably provided at the end of the lifting rod located on the inner side of the ventilation mesh cover.

[0027] Compared with the prior art, the present invention provides a high-capacity energy storage system based on a liquid-cooled battery module, which has the following beneficial effects:

[0028] 1. This high-capacity energy storage system based on liquid-cooled battery modules is integrated in a cabinet through the installation of liquid-cooled battery modules, UPS backup power supply, display screen, emergency stop button, module high-voltage box, DC to AC output equipment, circuit breaker isolation switch, sound and light alarm, water machine, and dehumidifier. This highly integrated design greatly optimizes the space utilization of the energy storage system, greatly reduces the footprint of the entire system, and meets the strict requirements of commercial carriers and small factories for the equipment footprint. At the same time, due to the use of water machines to dissipate heat for liquid-cooled battery modules, the system can dissipate heat efficiently, ensuring that the battery pack maintains a low temperature and temperature difference during the charging and discharging process, thereby significantly extending the battery life and improving the overall reliability of the system. Secondly, the integrated UPS backup power supply provides uninterrupted power support for the system, ensuring the continuous operation of key equipment even in the event of a power grid failure or emergency power outage, avoiding the risk of production interruption and data loss. The setting of the display screen and emergency stop button makes the system status monitoring and emergency shutdown operations intuitive and convenient, improving the operability and safety of the system. In addition, the integration of the module high-voltage box, DC to AC output equipment and circuit breaker isolation switch not only simplifies the electrical connection and wiring of the system, but also improves the electrical performance and safety of the system. The coordinated work of these components enables the system to stably output high-quality AC power to meet the needs of various electrical equipment. Finally, the integration of sound and light alarms provides the system with real-time fault warning and alarm functions, which can promptly issue alarms when abnormalities occur in the system, reminding operators to take necessary measures, thereby effectively avoiding potential safety hazards. The forklift hole facilitates the transportation of the cabinet, and the fire hose can be used to extinguish fires in emergencies.

[0029] 2. The high-capacity energy storage system based on the liquid-cooled battery module can filter dust during ventilation through the ventilation mesh cover. The cleaning component and the shielding component can be used to clean the ventilation mesh cover and shield dust after use, thereby preventing dust from entering the interior when not in use and increasing the protection effect. The sealing component can seal the through groove to prevent dust from entering the interior of the cabinet. The pressing structure can press the edge of the descending dustproof cloth so that the dustproof cloth fits on the inner side of the ventilation mesh cover, reducing the generation of gaps and improving the shielding and protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the internal structure of the front end of the cabinet of the present invention;

[0032] Figure 3 It is a schematic diagram of the internal structure of the rear end of the cabinet of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the ventilation mesh cover of the present invention;

[0034] Figure 5 The present invention Figure 4 A structural diagram from another perspective based on the above;

[0035] Figure 6 The present invention Figure 4 Schematic diagram of the structure when the foundation is disassembled;

[0036] Figure 7 It is a schematic diagram of the structure of the lifting rod and the sealing slider of the present invention in a disassembled state;

[0037] Figure 8 It is a schematic diagram of the overall structure of the pressing sheet and the fixing plate of the present invention;

[0038] Fig. 9 It is a schematic diagram of the cross-sectional structure of the end portion of the mesh cover frame of the present invention.

[0039] In the figure: 1. cabinet; 2. ventilation mesh cover; 3. hydrogen fan; 4. sound and light alarm; 5. display screen; 6. emergency stop button; 7. forklift hole; 8. fire hose; 9. UPS backup power supply; 10. water machine; 11. dehumidifier; 12. liquid-cooled battery module; 13. module high-voltage box; 14. DC to AC output device; 15. circuit breaker disconnector; 16. mesh cover frame; 17. motor; 18. bearing seat; 19. lifting seat; 20. screw rod; 21. fixing plate; 22. pressing piece; 23. lifting rod; 24. containing box; 25. through groove; 26. sealing strip; 27. reel; 28. dustproof cloth; 29. ​​sealing slider; 30. roller; 31. brush strip; 32. guide rod; 33. first spring; 34. groove; 35. second spring; 36. sealing groove. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0041] like Figure 1-9As shown, a high-capacity energy storage system based on a liquid-cooled battery module includes a cabinet 1 and a liquid-cooled battery module 12. The liquid-cooled battery module 12 is evenly arranged at one end of the inner side of the cabinet 1 and is used to provide electric energy. A water machine 10 is arranged above the liquid-cooled battery module 12 and is used to dissipate heat inside the cabinet 1. Since the water machine 10 is used to dissipate heat for the liquid-cooled battery module 12, the system can dissipate heat efficiently and ensure that the battery pack maintains a low temperature and temperature difference during the charging and discharging process, thereby significantly extending the service life of the battery and improving the overall reliability of the system. A module high-voltage box 13 is arranged above one end of the inner side of the cabinet 1, and the module high-voltage box 13 is connected in parallel with the liquid-cooled battery module 12. , the module high-voltage box 13 is used to distribute the power of the liquid-cooled battery module 12, the DC-to-AC output device 14 is arranged below the module high-voltage box 13, and is used to convert the direct current of the liquid-cooled battery module 12 into alternating current, and the circuit breaker isolating switch 15 is arranged below the DC-to-AC output device 14, and is used to connect to the user-side AC power supply side. The integration of the module high-voltage box 13, the DC-to-AC output device 14 and the circuit breaker isolating switch 15 not only simplifies the electrical connection and wiring of the system, but also improves the electrical performance and safety of the system. The coordinated work of these components enables the system to stably output high-quality alternating current to meet the needs of various electrical equipment;

[0042] Furthermore, a UPS backup power supply 9 is included, which is arranged in front of the DC to AC output device 14 in the cabinet 1. The integrated UPS backup power supply 9 provides uninterrupted power support for the system, and can ensure the continuous operation of key equipment even in the event of a power grid failure or emergency power outage, thereby avoiding the risk of production interruption and data loss.

[0043] It also includes an audible and visual alarm 4, which is arranged at one end of the top of the cabinet 1. The integration of the audible and visual alarm 4 provides the system with real-time fault warning and alarm functions, and can promptly issue an alarm when an abnormality occurs in the system to remind the operator to take necessary measures, thereby effectively avoiding potential safety hazards;

[0044] The cabinet 1 also includes a display screen 5, which is arranged at one end of the front of the cabinet 1, and an emergency stop button 6, which is arranged at one end of the front of the cabinet 1 near the display screen 5. The arrangement of the display screen 5 and the emergency stop button 6 makes the system status monitoring and emergency stop operation intuitive and convenient, thereby improving the operability and safety of the system.

[0045] A hydrogen blower 3 is also provided, which is arranged on one side of the cabinet 1 close to the liquid-cooled battery module 12. The working principle of the hydrogen exhaust fan is generally to generate airflow by driving the fan blades to rotate through a motor. When the airflow passes through the heat exchanger or heat sink inside the device, the heat is taken away and discharged outside the device. At the same time, the airflow can also dilute and discharge the hydrogen inside the device to prevent its accumulation.

[0046] A dehumidifier 11 is also provided, which is arranged in the gap at the upper end of the liquid-cooled battery module 12 and is used to remove internal moisture;

[0047] The liquid-cooled battery module 12, UPS backup power supply 9, display screen 5, emergency stop button 6, module high-voltage box 13, DC to AC output device 14, circuit breaker isolation switch 15, sound and light alarm 4, water machine 10, and dehumidifier 11 are integrated on a cabinet 1. This highly integrated design greatly optimizes the space utilization of the energy storage system, greatly reduces the area occupied by the entire system, and meets the strict requirements of commercial carriers and small factories on the equipment area.

[0048] Furthermore, a pair of forklift holes 7 are provided at the bottom of the cabinet 1, which facilitate the transportation of the cabinet 1. A fire hose 8 is provided at one end of the bottom of the cabinet 1, and one end of the fire hose 8 is used for an external water source, and the other end extends in the inner gap of the cabinet 1, and a nozzle is provided on one end located on the inner side of the cabinet 1. The fire hose 8 can be used for fire extinguishing in case of emergencies.

[0049] In addition, a mesh frame 16 corresponding to the water machine 10 is provided on the side of the upper end of the cabinet 1, and a ventilation mesh cover 2 for ventilation is provided in the mesh frame 16, and a cleaning component is provided on the side of the ventilation mesh cover 2, and the cleaning component includes a lifting rod 23 arranged on the inner and outer sides of the ventilation mesh cover 2, and a brush strip 31 that fits the ventilation mesh cover 2 is provided on the opposite side of the two lifting rods 23, and through grooves 25 are symmetrically provided at both ends of the mesh frame 16, and the through grooves 25 are vertically movably connected with sealing sliders 29 corresponding to the ends of the lifting rods 23, and the two ends of the sealing slider 29 are respectively fixedly connected to the opposite sides of the two lifting rods 23, and a screw rod 20 is vertically rotatably provided on the inner side of the ventilation mesh cover 2, and a motor 17 for driving the screw rod 20 to rotate is provided at one end of the screw rod 20, and a lifting seat 19 is fixedly provided on the lifting rod 23 located on the inner side of the ventilation mesh cover 2, and the lifting seat 19 is threadedly connected to the screw rod 20.

[0050] Furthermore, a shielding assembly is provided on the inner side of the ventilation mesh cover 2, and the shielding assembly includes a containing box 24 arranged on the inner upper end of the mesh cover frame 16, the bottom of the containing box 24 is open, and the inner side of the containing box 24 is rotatably connected with a reel 27, and a dustproof cloth 28 adapted to the ventilation mesh cover 2 is wound on the outer side of the reel 27, and the free end of the dustproof cloth 28 is fixedly connected to the top of the lifting rod 23 located on the inner side of the ventilation mesh cover 2, and a torsion spring for resetting the dustproof cloth 28 is provided between the two ends of the reel 27 and the inner wall of the containing box 24, and bearing seats 18 are provided at the upper and lower ends of the inner side of the mesh cover frame 16, and the two ends of the screw rod 20 are rotatably connected to the two bearing seats 18, and the motor 17 is provided on one side of one of the bearing seats 18.

[0051] Furthermore, a sealing assembly is provided on the inner side of the through groove 25, and the sealing assembly includes grooves 34 symmetrically arranged on both sides of the inner side of the through groove 25, and the grooves 34 are movably connected with the sealing strips 26, and a second spring 35 is provided between one side of the sealing strip 26 and the inner wall of the groove 34, and when the second spring 35 is in the initial state, the two sealing strips 26 in the same through groove 25 are fitted, and sealing grooves 36 are provided on the upper and lower ends of the sealing strip 26 away from the second spring 35. The upper and lower ends of the sealing slider 29 are conical, and the shape formed by the sealing slider 29 and the sealing grooves 36 on the two sealing strips 26 is adapted.

[0052] In addition, a pressing mechanism for pressing the edge of the dustproof cloth 28 is provided on the inner edge of the mesh cover frame 16, and the pressing mechanism includes an "L"-shaped fixed plate 21 arranged on the side of the mesh cover frame 16, and a guide rail 32 is movably connected to the fixed plate 21. An isosceles trapezoidal pressing piece 22 is provided at one end of the guide rail 32 close to the ventilation mesh cover 2, and a first spring 33 is provided between the side of the guide rod 32 close to the pressing piece 22 and the side wall of the pressing piece 22. The end of the lifting rod 23 located on the inner side of the ventilation mesh cover 2 is rotatably provided with a roller 30 for rolling cooperation with the side wall of the pressing piece 22.

[0053] As for the principle of the cleaning component and the shielding component, when in use, air flows in and out through the ventilation mesh cover 2, and most of the dust can be filtered. After use, the motor 17 drives the screw rod 20 to rotate, and the screw rod 20 drives the two lifting rods 23 and the sealing slider 29 to move longitudinally as a whole through the lifting seat 19. The inner lifting rod 23 drives the dustproof cloth 28 to move downward, and then the dustproof cloth 28 shields the inner side of the ventilation mesh cover 2, and the sealing slider 29 is initially located in the sealing groove 36 at the upper end of the sealing strip 26. When it moves downward, it squeezes the sealing strip 26, and then the sealing strip 26 compresses the second spring 35. When the lifting rod 23 moves downward, the brush strip 31 is used to move the ventilation mesh cover 2. The inside and outside of the mesh cover 2 are cleaned, and the dustproof cloth 28 is shielded at the same time. When the lifting rod 23 moves downward, the pressing piece 22 will be squeezed by the roller 30, and the pressing piece 22 compresses the first spring 33. When the roller 30 is separated from the pressing piece 22, the first spring 33 is reset, and one end of the pressing piece 22 will press the edge of the dustproof cloth 28. Finally, the sealing slider 29 enters the sealing groove 36 at the lower end of the sealing strip 26, and then the sealing strip 26 is closed again to achieve sealing. When the cabinet 1 is used again in the future, the motor 17 can be controlled to reverse, and then the torsion spring at the end of the reel 27 is reset, the lifting rod 23 rises, and the dustproof cloth 28 is rolled up by the reel 27.

[0054] It should be noted that the present invention is a high-capacity energy storage system based on a liquid-cooled battery module. The product adopts a liquid-cooled battery module 12, the DC power measurement is 232kWh, the cabinet 1 covers an area of ​​1.82㎡, and the energy density of the product at the project site can reach 127.5kWh / ㎡. The product's external output electrical interface is 380Vac, 50Hz, and the cabinet 1 adopts an outdoor cabinet form with IP54 protection level and C4 / C5 corrosion resistance level. The strength refers to the second-level seismic resistance level and 8-degree fortification intensity requirements, meets the requirements of second-level road transportation and sea transportation, and meets the fire insulation function of more than 1 hour. The PCS conversion system is integrated in the cabinet, supporting a maximum AC output of 100kW, supporting UPS function and photovoltaic access, and the overall temperature difference of the battery cell during charging and discharging does not exceed 3.5°C, the maximum temperature does not exceed 35°C, and the overall charge and discharge cycle life is not less than 6000 times (at 25°C). The two-way efficiency of the product is not less than 85% (when the battery cell is BOL). The cabinet is equipped with a level 3 fire safety system, including early combustible gas monitoring and emission, smoke temperature detection and fire extinguishing, and water fire fighting. The product supports off-grid parallel operation and black start. The product can be used in an environment of -20℃ ~ 45℃ and below 2000 meters above sea level. The product supports other derivative configurations or customer customized development, such as installing an isolation transformer.

[0055] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-capacity energy storage system based on a liquid-cooled battery module, characterized in that: It comprises a cabinet (1); Liquid-cooled battery modules (12), the liquid-cooled battery modules (12) being evenly arranged at one end of the inner side of the cabinet (1) and used for providing electric energy; A module high-voltage box (13) is arranged above one end of the inner side of the cabinet (1), and the module high-voltage box (13) is connected in parallel with the liquid-cooled battery module (12). The module high-voltage box (13) is used to distribute the electricity of the liquid-cooled battery module (12); A DC to AC output device (14), disposed below the module high voltage box (13), for converting the direct current of the liquid-cooled battery module (12) into alternating current; A circuit breaker isolating switch (15), which is arranged below the DC to AC output device (14) and is used to connect to the AC power supply side of the user end; A UPS backup power supply (9) is arranged in front of a DC to AC output device (14) in the cabinet (1); A water machine (10) is arranged above the liquid-cooled battery module (12) and is used to dissipate heat inside the cabinet (1); An audible and visual alarm (4), wherein the audible and visual alarm (4) is arranged at one end of the top of the cabinet (1); A display screen (5), wherein the display screen (5) is arranged at one end of the front side of the cabinet (1); An emergency stop button (6), the emergency stop button (6) being arranged at one end of the front of the cabinet (1) close to the display screen (5); A hydrogen blower (3) is arranged on a side of the cabinet (1) close to the liquid-cooled battery module (12); The dehumidifier (11) is arranged in the gap at the upper end of the liquid-cooled battery module (12).

2. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 1, characterized in that: A pair of forklift holes (7) are provided at the bottom of the cabinet (1).

3. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 1, characterized in that: A fire-fighting water pipe (8) is provided at one end of the bottom of the cabinet (1), and one end of the fire-fighting water pipe (8) is used to connect to an external water source, while the other end extends in the inner gap of the cabinet (1), and a nozzle is provided on the end located on the inner side of the cabinet (1).

4. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 1, characterized in that: A mesh cover frame (16) corresponding to the water machine (10) is arranged on the side surface of the upper end of the cabinet (1), and a ventilation mesh cover (2) for ventilation is arranged in the mesh cover frame (16).

5. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 4, characterized in that: A cleaning assembly is arranged on the side of the ventilation mesh cover (2), and the cleaning assembly comprises lifting rods (23) arranged on the inner and outer sides of the ventilation mesh cover (2), and brush strips (31) that are in contact with the ventilation mesh cover (2) are arranged on opposite sides of the two lifting rods (23). Through grooves (25) are symmetrically arranged at both ends of the mesh cover frame (16), and the through grooves (25) are vertically movably connected with sealing sliders (29) corresponding to the ends of the lifting rods (23), and the two ends of the sealing sliders (29) are respectively fixedly connected to the opposite sides of the two lifting rods (23). A screw rod (20) is arranged on the inner side of the ventilation mesh cover (2) for vertical rotation, and a motor (17) for driving the screw rod (20) to rotate is arranged at one end of the screw rod (20), and a lifting seat (19) is fixedly arranged on the lifting rod (23) located on the inner side of the ventilation mesh cover (2), and the lifting seat (19) is threadedly connected to the screw rod (20).

6. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 5, characterized in that: A shielding assembly is arranged on the inner side of the ventilation mesh cover (2), and the shielding assembly comprises a containing box (24) arranged on the inner upper end of the mesh cover frame (16), the bottom of the containing box (24) is open, the inner side of the containing box (24) is rotatably connected with a reel (27), the outer side of the reel (27) is wound with a dustproof cloth (28) adapted to the ventilation mesh cover (2), and the free end of the dustproof cloth (28) is fixedly connected to the top of the lifting rod (23) located on the inner side of the ventilation mesh cover (2), and a torsion spring for resetting the dustproof cloth (28) is arranged between the two ends of the reel (27) and the inner wall of the containing box (24).

7. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 6, characterized in that: The upper and lower ends of the inner side of the mesh frame (16) are both provided with bearing seats (18), the two ends of the screw rod (20) are rotatably connected to the two bearing seats (18), and the motor (17) is arranged on one side of one of the bearing seats (18).

8. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 7, characterized in that: A sealing assembly is arranged inside the through groove (25), and the sealing assembly comprises grooves (34) symmetrically arranged on both sides of the inner side of the through groove (25), and the groove (34) is movably connected with a sealing strip (26), and a second spring (35) is arranged between one side of the sealing strip (26) and the inner wall of the groove (34), and when the second spring (35) is in an initial state, the two sealing strips (26) in the same through groove (25) are in contact with each other.

9. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 8, characterized in that: The sealing strip (26) is provided with sealing grooves (36) at the upper and lower ends thereof, which are away from the second spring (35). The sealing slider (29) is tapered at the upper and lower ends thereof, and the sealing slider (29) is adapted to the shape formed by the sealing grooves (36) on the two sealing strips (26).

10. A high-capacity energy storage system based on a liquid-cooled battery module according to claim 9, characterized in that: The inner edge of the mesh cover frame (16) is provided with a pressing mechanism for pressing the edge of the dustproof cloth (28), and the pressing mechanism includes an "L"-shaped fixed plate (21) arranged on the side of the mesh cover frame (16), and a guide rail (32) is movably connected to the fixed plate (21), and an isosceles trapezoidal pressing piece (22) is arranged at one end of the guide rail (32) close to the ventilation mesh cover (2), and a first spring (33) is arranged between the side of the guide rod (32) close to the pressing piece (22) and the side wall of the pressing piece (22), and a roller (30) for rolling cooperation with the side wall of the pressing piece (22) is rotatably arranged at the end of the lifting rod (23) located on the inner side of the ventilation mesh cover (2).

Images