Cooling system of electrolyte storage tank

Abstract

The utility model relates to the technical field of cooling equipment, in particular to a cooling system of an electrolyte storage tank. The water cooling unit is connected with the fluoroplastic heat exchanger, and the fluoroplastic heat exchanger is arranged in the electrolyte storage tank; the whole fluoroplastic heat exchanger is made of fluoroplastic, the fluoroplastic heat exchanger comprises an end plate and a bottom plate, at least three perforated plates are integrally formed between the end plate and the bottom plate, and a plurality of pipe penetrating holes are evenly formed in the perforated plates in an array mode. An inlet connector and an outlet connector are arranged on the end plate, a plurality of inlet holes are formed in the inlet connector, a plurality of outlet holes are formed in the outlet connector, thin pipes are communicated with the inlet holes and the outlet holes and penetrate through part of the pipe penetrating holes in the pipe penetrating holes in a surrounding and circling mode, and the number of the thin pipes is the same as that of the inlet holes; the fluoroplastic heat exchanger is placed in the electrolyte storage tank, the cooling liquid takes away the heat of the electrolyte through the thin pipe, the contact area is larger than that of natural cooling, forced air cooling and direct heat conduction, and the cooling efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of cooling equipment technology, specifically to a cooling system for an electrolyte storage tank. Background Technology

[0002] As a crucial component of energy storage systems, energy storage electrolytes generate a significant amount of heat during operation. To ensure the normal operation of energy storage systems and extend their lifespan, effective cooling measures are essential. Common methods for cooling energy storage electrolytes include natural cooling, forced air cooling, and direct heat transfer. Natural cooling utilizes airflow in the environment to dissipate heat; forced air cooling uses fans or blowers to force airflow and accelerate heat dissipation; and direct heat transfer systems involve direct contact between the energy storage unit and the cooling medium to achieve heat transfer. All three of these cooling methods suffer from low cooling efficiency. Since energy storage electrolytes generate a large amount of heat during operation, natural cooling, forced air cooling, and direct heat transfer cannot meet their cooling requirements. Therefore, a more efficient cooling solution is needed to replace existing cooling methods for energy storage electrolytes. Utility Model Content

[0003] The problem to be solved is to provide a more efficient cooling solution for the energy storage electrolyte.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a cooling system for an electrolyte storage tank, comprising a water-cooled unit connected to a fluoroplastic heat exchanger, the fluoroplastic heat exchanger being disposed inside the electrolyte storage tank; the fluoroplastic heat exchanger is entirely made of fluoroplastic, and includes an end plate and a bottom plate, with at least three perforated plates integrally formed between the end plate and the bottom plate, the perforated plates having a plurality of through-holes evenly arranged; the end plate is provided with an inlet connector and an outlet connector, the inlet connector having a plurality of inlet holes, the outlet connector having a plurality of outlet holes, a thin tube connecting the inlet holes and the outlet holes and spiraling around and passing through a portion of the through-holes, the number of thin tubes being the same as the number of inlet holes; the water-cooled unit includes a plate heat exchanger, the plate heat exchanger having a return port, a supply port, a coolant inlet and a coolant outlet, the supply port being connected to the inlet connector, and the return port being connected to the outlet connector.

[0005] Preferably, a main pump and a closed expansion tank are provided between the return port and the outlet connector. The inlet end of the main pump is also provided with a charging liquid pipeline. The inlet of the closed expansion tank is connected to the outlet connector. The supply port is connected to the inlet connector through a heater. The coolant inlet and coolant outlet are both connected to the compressor. The compressor is connected to the coolant inlet through a finned heat exchanger. A dryer filter and an electronic expansion valve are provided in sequence between the finned heat exchanger and the coolant inlet. The outlet of the electronic expansion valve is connected to the coolant inlet.

[0006] Preferably, a return liquid temperature sensor and a return liquid pressure sensor are provided between the inlet and outlet joints of the closed expansion tank, and an automatic air vent valve is provided on the top of the closed expansion tank.

[0007] Preferably, the bottom of the closed expansion tank is connected to the main pump via a Y-type filter.

[0008] Preferably, a liquid supply temperature sensor and a liquid supply pressure sensor are provided between the heater and the inlet of the fluoroplastic heat exchanger.

[0009] Preferably, a charging valve and a subcooled liquid temperature sensor are provided between the finned heat exchanger and the dryer filter, and an exhaust pressure sensor, an exhaust temperature sensor, and a high-pressure switch are provided between the compressor and the finned heat exchanger.

[0010] Preferably, a suction pressure sensor and a suction temperature sensor are provided between the compressor and the coolant outlet.

[0011] Preferably, the water-cooled unit is also equipped with an ambient temperature sensor, an electrical cabinet temperature sensor, and a cooling fan. The cooling fan and the ambient temperature sensor are located outside the unit, while the electrical cabinet temperature sensor is located inside the unit.

[0012] Compared with the prior art, this utility model provides a cooling system for an electrolyte storage tank, which has the following beneficial effects: The advantages of this invention are:

[0013] 1. Fluoroplastic heat exchangers use fluoroplastics as raw materials. Fluoroplastics are low-cost and are insulating materials, preventing electric shock accidents. Their heat transfer area and volume are much larger than those of metal heat exchangers, and their overall heat transfer coefficient can reach 120–220 W / (m²). 2 • K is approximately twice that of metal heat exchange tubes; fluoroplastics hardly react with strong acids or alkalis, so there is no need to consider the low-temperature acid corrosion of the heat exchanger during operation, thus fluoroplastic heat exchangers have a long service life; at the same time, fluoroplastics have a high melting point and heat distortion temperature, enabling them to work stably in high-temperature environments.

[0014] 2. This utility model system uses a water-cooled unit combined with a fluoroplastic heat exchanger to cool the electrolyte. The fluoroplastic heat exchanger is placed inside the electrolyte storage tank, which has a larger contact area and higher heat transfer efficiency than natural cooling, forced air cooling, and direct heat conduction. The water-cooled unit provides a continuous supply of coolant to the fluoroplastic heat exchanger. The combination of the water-cooled unit and the fluoroplastic heat exchanger has high cooling efficiency and strong practicality, and effectively meets the cooling requirements of the electrolyte. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the system connection of this utility model;

[0016] Figure 2This is a schematic diagram of the water-cooled unit of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the fluoroplastic heat exchanger of this utility model;

[0018] Figure 4 This is a schematic diagram of the fluoroplastic heat exchanger of this utility model from another angle;

[0019] Figure 5 A schematic diagram of the thin tube winding method designed for this utility model;

[0020] Explanation of reference numerals in the attached diagram: 1. Closed expansion tank; 2. Automatic vent valve; 3. Y-type filter; 4. Main pump; 41. Filling fluid pipeline; 5. Plate heat exchanger; 51. Return port; 52. Supply port; 53. Coolant inlet; 54. Coolant outlet; 6. Heater; 7. Compressor; 8. Finned heat exchanger; 9. Dryer filter; 10. Electronic expansion valve; 11. Supply temperature sensor; 12. Return temperature sensor; 13. Supply pressure sensor; 14. Return pressure sensor; 15. Vent pressure sensor; 16. 17. Exhaust temperature sensor; 18. High-pressure switch; 19. Intake pressure sensor; 20. Intake temperature sensor; 21. Subcoolant temperature sensor; 22. Ambient temperature sensor; 23. Electrical cabinet temperature sensor; 24. Ball valve; 25. Charging valve one; 26. Charging valve two; 37. Cooling fan; 38. Fluoroplastic heat exchanger; 39. Perforated plate; 30. Pipe hole; 31. End plate; 32. Inlet connector; 33. Inlet hole; 34. Outlet connector; 35. Outlet hole; 36. Base plate; 37. Thin tube. Detailed Implementation

[0021] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model:

[0022] To provide a highly efficient cooling method for the energy storage electrolyte, this system employs a water-cooled unit with a fluoroplastic heat exchanger 30. Figure 1 The water-cooled unit shown is connected to a fluoroplastic heat exchanger 30, which is immersed in an electrolyte storage tank. The entire fluoroplastic heat exchanger 30 is made of fluoroplastic. The fluoroplastic heat exchanger 30 includes an end plate 32 and a bottom plate 35, with at least three perforated plates 31 integrally formed between the end plate 32 and the bottom plate 35. Figures 3 to 5The diagram shows four perforated plates 31, arranged circumferentially around their intersecting centers. Each of the four plates 31 has a uniform array of through-holes 311. An end plate 32 has an inlet connector 33 and an outlet connector 34. The inlet connector 33 has multiple inlet holes 331, and the outlet connector 34 has multiple outlet holes 341. A thin tube 36 connects the inlet holes 331 and the outlet holes 341, spiraling and passing through a portion of the through-holes 311. The number of thin tubes 36 is the same as the number of inlet holes 331. Figures 3 to 5 The number of inlet holes 331 and outlet holes 341 shown are both three, so there are also three capillary tubes 36 (only one is shown in the diagram for ease of explanation). These three capillary tubes 36 pass through several through-holes 311 and coil around the four perforated plates 31, increasing the contact area between the coolant and the electrolyte and improving the cooling effect. The coolant is transported to the capillary tubes 36 by the water-cooled unit. The coolant in the capillary tubes 36 absorbs heat from the electrolyte and then flows back to the water-cooled unit.

[0023] The water-cooled unit includes a plate heat exchanger 5, which has a return port 51, a supply port 52, a coolant inlet 53, and a coolant outlet 54. The supply port 52 is connected to the inlet connector 33, and the return port 51 is connected to the outlet connector 34. Specifically, a main pump 4 and a closed expansion tank 1 are located between the return port 51 and the outlet connector 34. A Y-type filter 3 is installed at the bottom of the closed expansion tank 1 between the main pump 4 and the main pump 4. The inlet end of the main pump 4 is also equipped with a charging liquid pipeline 41, which is equipped with a ball valve 23 for controlling its opening and closing. The inlet of the closed expansion tank 1 is connected to the outlet connector 34. The supply port 52 is connected to the inlet connector 33 through a heater 6. A supply temperature sensor 11 and a supply pressure sensor 13 are installed between the heater 6 and the inlet connector 33. Both the coolant inlet 53 and the coolant outlet 54 are connected to a compressor 7. The compressor 7 is connected to the coolant inlet 53 via a finned heat exchanger 8. A dryer filter 9 and an electronic expansion valve 10 are sequentially installed between the finned heat exchanger 8 and the coolant inlet 53, with the outlet of the electronic expansion valve 10 connected to the coolant inlet 53. A charging valve 24 and a subcooled liquid temperature sensor 20 are installed between the finned heat exchanger 8 and the dryer filter 9. An exhaust pressure sensor 15, an exhaust temperature sensor 16, and a high-pressure switch 17 are installed between the compressor 7 and the finned heat exchanger 8. An intake pressure sensor 18 and an intake temperature sensor 19 are installed between the compressor 7 and the coolant outlet 54. A return liquid temperature sensor 12 and a return liquid pressure sensor 14 are installed between the inlet and outlet connectors 34 of the closed expansion tank 1. An automatic vent valve 2 is installed on the top of the closed expansion tank 1, which automatically removes excess gas from the system. The water-cooled unit is also equipped with an ambient temperature sensor 21, an electrical cabinet temperature sensor 22, and a cooling fan 26. The cooling fan 26 and ambient temperature sensor 21 are located outside the unit, while the electrical cabinet temperature sensor 22 is located inside the unit. The plate heat exchanger 5 performs heat exchange through a cyclical process of refrigerant compression, condensation, expansion, and evaporation. The compressor 7 compresses the low-pressure, low-temperature refrigerant gas into a high-pressure, high-temperature gas, which then reaches the finned heat exchanger 8, releasing heat and becoming a high-pressure liquid. The cooling fan 26 draws in outside air and discharges the heat released during refrigerant condensation into the surrounding ambient air. After passing through the dryer filter 9 and the electronic expansion valve 10, the refrigerant slowly releases pressure, becoming a low-pressure liquid, and finally reaches the plate heat exchanger 5 for evaporation, absorbing heat from the coolant flowing through the plate heat exchanger 5. The main pump 4 continuously delivers the coolant from the fluoroplastic heat exchanger 30 to the plate heat exchanger 5 for heat exchange with the refrigerant, and then delivers the cooled coolant to the fluoroplastic heat exchanger 30 to cool the liquid in the electrolyte storage tank.

[0024] This system uses a water-cooled unit whose supply end is connected to the inlet connector 33 of the fluoroplastic heat exchanger 30, and whose outlet connector 34 is connected to the return end of the water-cooled unit. The fluoroplastic heat exchanger 30 is immersed in an electrolyte storage tank. The water-cooled unit supplies coolant to the fluoroplastic heat exchanger 30, and the coolant carries away heat from the electrolyte as it flows through the thin tube 36. Because the electrolyte carries high voltage during use, the fluoroplastic heat exchanger 30 is entirely made of fluoroplastic, which is an insulating material to prevent electric shock. Furthermore, fluoroplastic is relatively inexpensive, and its heat transfer area and volume are much larger than those of metals, with a comprehensive heat transfer coefficient reaching 120–220 W / (m²). 2 • K is approximately twice that of metal heat exchange tubes; Furthermore, fluoroplastics hardly react with strong acids or alkalis, eliminating the need to consider low-temperature acid corrosion during operation, thus extending their service life; they also possess high melting points and heat distortion temperatures, enabling stable operation in high-temperature environments. Maintenance and replacement of the fluoroplastic heat exchanger 30 simply require removing it from the electrolyte outlet tank.

[0025] In operation, the coolant exits from outlet connector 34 to the closed expansion tank 1, then passes through Y-type filter 3 to filter impurities before reaching the main pump 4. Next, it reaches the plate heat exchanger 5 for heat exchange, then passes through the heater 6, and finally reaches the inlet connector 33 of the fluoroplastic heat exchanger 30, entering the capillary tube 36. The coolant in the capillary tube 36 absorbs heat from the electrolyte and returns to the closed expansion tank 1 from outlet connector 34. The fluorine system has two charging valves: one 24 and another 25. The compressor 7 and finned heat exchanger 8 provide a continuous cooling source to the plate heat exchanger 5, cooling the returning coolant.

[0026] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A cooling system for an electrolyte storage tank, characterized in that: The system includes a water-cooled unit connected to a fluoroplastic heat exchanger (30), which is located inside an electrolyte storage tank. The fluoroplastic heat exchanger (30) is entirely made of fluoroplastic and includes an end plate (32) and a bottom plate (35). At least three perforated plates (31) are integrally formed between the end plate (32) and the bottom plate (35). The perforated plates (31) have a uniform array of several through-holes (311). The end plate (32) is provided with an inlet connector (33) and an outlet connector (34). The inlet connector (33) has multiple inlet holes (331). The outlet connector (34) is provided with multiple outlet holes (341). The thin tube (36) connects the inlet hole (331) and the outlet hole (341) and spirals around and passes through a portion of the through holes (311). The number of thin tubes (36) is the same as the number of inlet holes (331). The water-cooled unit includes a plate heat exchanger (5). The plate heat exchanger (5) is provided with a return port (51), a supply port (52), a coolant inlet (53) and a coolant outlet (54). The supply port (52) connects to the inlet connector (33), and the return port (51) connects to the outlet connector (34).

2. The cooling system for the electrolyte storage tank as described in claim 1, characterized in that: A main pump (4) and a closed expansion tank (1) are provided between the return port (51) and the outlet connector (34). The inlet end of the main pump (4) is also provided with a filling liquid pipeline (41). The inlet of the closed expansion tank (1) is connected to the outlet connector (34). The supply port (52) is connected to the inlet connector (33) through the heater (6). The coolant inlet (53) and the coolant outlet (54) are both connected to the compressor (7). The compressor (7) is connected to the coolant inlet (53) through the finned heat exchanger (8). A dryer filter (9) and an electronic expansion valve (10) are provided between the finned heat exchanger (8) and the coolant inlet (53). The outlet of the electronic expansion valve (10) is connected to the coolant inlet (53).

3. The cooling system for the electrolyte storage tank as described in claim 2, characterized in that: The closed expansion tank (1) is equipped with a return liquid temperature sensor (12) and a return liquid pressure sensor (14) between the inlet and outlet connector (34), and an automatic air vent valve (2) is provided on the top of the closed expansion tank (1).

4. The cooling system for the electrolyte storage tank as described in claim 3, characterized in that: The bottom of the closed expansion tank (1) is connected to the main pump (4) through a Y-type filter (3).

5. The cooling system for the electrolyte storage tank as described in claim 4, characterized in that: A liquid supply temperature sensor (11) and a liquid supply pressure sensor (13) are provided between the heater (6) and the inlet of the fluoroplastic heat exchanger (30).

6. The cooling system for the electrolyte storage tank as described in claim 5, characterized in that: A charging valve (24) and a subcooled liquid temperature sensor (20) are provided between the finned heat exchanger (8) and the dryer filter (9). An exhaust pressure sensor (15), an exhaust temperature sensor (16), and a high pressure switch (17) are provided between the compressor (7) and the finned heat exchanger (8).

7. The cooling system for the electrolyte storage tank as described in claim 6, characterized in that: A suction pressure sensor (18) and a suction temperature sensor (19) are provided between the compressor (7) and the coolant outlet (54).

8. The cooling system for the electrolyte storage tank as described in claim 1, characterized in that: The water-cooled unit is also equipped with an ambient temperature sensor (21), an electrical cabinet temperature sensor (22), and a cooling fan (26). The cooling fan (26) and the ambient temperature sensor (21) are located outside the unit, while the electrical cabinet temperature sensor (22) is located inside the unit.

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