A thermal management unit for an energy storage power station

Abstract

The present invention relates to a thermal management unit of an energy storage power station, comprising a frame and at least two groups of thermal management units; the thermal management unit: a compressor, a liquid-cooled condenser, a throttling device, a battery heat exchanger and the compressor are sequentially connected to form a refrigerant circulation loop, the four ports of a first four-way valve are respectively connected to a coolant water inlet branch pipe, a coolant inlet of a liquid-cooled condenser, a coolant inlet of a battery heat exchanger and a coolant outlet of a radiator, the four ports of a second four-way valve are respectively connected to the coolant outlet of the liquid-cooled condenser, an inlet of a first water pump, an inlet of a second water pump and a coolant outlet of the battery heat exchanger, the outlet of the first water pump is connected to the coolant inlet of the radiator, and the outlet of the second water pump is connected to a coolant water outlet branch pipe; the thermal management unit is detachably arranged on the frame, the coolant water inlet branch pipe is connected to the coolant outlet of the energy storage power station through a coolant water inlet main pipe, and the coolant water outlet branch pipe is connected to the coolant inlet of the energy storage power station through a coolant water outlet main pipe.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal management systems for energy storage power stations, and in particular relates to a thermal management unit for an energy storage power station. Background Art

[0002] Energy storage power stations are equipment systems that store, convert, and release cyclical electrical energy through electrochemical cells or electromagnetic energy storage media. Electrochemical energy storage power stations convert energy through chemical reactions that charge and discharge the positive and negative electrodes of batteries. my country's energy storage industry is currently booming, but batteries have high requirements for the working environment, so the problem of optimizing battery thermal management in energy storage power stations urgently needs to be solved. Currently, battery thermal management in energy storage power stations mainly relies on customized cooling cabinets based on the cooling needs of the energy storage power station. These cabinets have the following drawbacks: 1. Existing cooling cabinets are large and costly; 2. Existing cooling cabinets are assembled from components on-site at the energy storage power station, resulting in poor product consistency and unreliable product stability; 3. If quality problems arise with the cooling cabinet, the energy storage power station cannot be used, and the cooling cabinet must be repaired before the energy storage power station can be restarted. Furthermore, cooling cabinet repair is complex and difficult. Summary of the Invention

[0003] In order to solve the problems of large size, troublesome on-site assembly and maintenance of battery thermal management systems in energy storage power stations in the prior art, the present invention provides a thermal management unit for an energy storage power station.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a thermal management unit of an energy storage power station, comprising a frame, a coolant water inlet main pipe, a coolant water outlet main pipe and at least two sets of thermal management units, wherein the thermal management unit comprises a shell, and a compressor, a liquid-cooled condenser, a throttling device, a battery heat exchanger, a cooling fan, a radiator, a first four-way valve, a second four-way valve, a first water pump, a second water pump, a coolant water inlet branch pipe and a coolant water outlet branch pipe arranged on the shell, wherein the cooling fan is used to dissipate heat to the radiator; the compressor, the liquid-cooled condenser , a throttling device, a battery heat exchanger and a compressor are connected in sequence to form a refrigerant circulation loop; the four ports of the first four-way valve are respectively connected to the coolant inlet branch pipe, the coolant inlet of the liquid-cooled condenser, the coolant inlet of the battery heat exchanger and the coolant outlet of the radiator; the four ports of the second four-way valve are respectively connected to the coolant outlet of the liquid-cooled condenser, the inlet of the first water pump, the inlet of the second water pump and the coolant outlet of the battery heat exchanger; the outlet of the first water pump is connected to the coolant inlet of the radiator, and the outlet of the second water pump is connected to the coolant outlet branch pipe;

[0005] At least two groups of thermal management units are detachably arranged on the rack, the coolant inlet branch pipe is connected to the coolant inlet main pipe, and the coolant outlet branch pipe is connected to the coolant outlet main pipe; the coolant inlet main pipe is connected to the coolant outlet of the energy storage power station, and the coolant outlet main pipe is connected to the coolant inlet of the energy storage power station.

[0006] Preferably, a refill kettle is provided on the rack and connected to the coolant main inlet pipe. The refill kettle is used to replenish coolant to the thermal management unit. This effectively extends the service life of the coolant, ensures the effectiveness of the coolant, reduces the need to replenish coolant to the thermal management unit, and reduces maintenance costs.

[0007] Preferably, the rack is sequentially provided with a plurality of support plates from bottom to top, with installation spaces formed between adjacent support plates. At least two sets of thermal management units are detachably installed in corresponding installation spaces from bottom to top, and the rehydration water bottle is installed on top of the rack. This thermal management unit has a reasonable and reliable spatial layout, reduces floor space, and facilitates installation and removal of the thermal management units.

[0008] Preferably, the number of thermal management units is 4. Small platform-based thermal management units are combined according to the customer's cooling needs to meet the customer's needs. The number of thermal management units is set reasonably to facilitate the installation and removal of the thermal management units. When one thermal management unit is maintained, the other three thermal management units are fully loaded to ensure the normal operation of the thermal management unit without shutdown.

[0009] Furthermore, the housing includes a bottom plate and mesh panels located around the bottom plate, the mesh panels surrounding the bottom plate enclosing a storage space. The cooling fan is located outside the storage space, while the compressor, liquid-cooled condenser, throttling device, battery heat exchanger, radiator, first four-way valve, second four-way valve, first water pump, and second water pump are all located inside the storage space. The coolant inlet and outlet branches extend from the inside of the storage space to the outside. This facilitates the integration of the thermal management unit and facilitates heat exchange between the thermal management unit and the outside world.

[0010] Furthermore, the thermal management unit also includes a refrigerant flow channel plate and a coolant flow channel plate. The refrigerant flow channel plate is used to connect the refrigerant outlet of the liquid-cooled condenser with the inlet of the throttling device, and the outlet of the throttling device with the refrigerant inlet of the battery heat exchanger. The liquid-cooled condenser, the throttling device and the battery heat exchanger are integrated and assembled on the refrigerant flow channel plate. The coolant flow channel plate is used to connect the two ports corresponding to the first four-way valve with the coolant inlet of the liquid-cooled condenser and the coolant inlet of the battery heat exchanger, and the four ports of the second four-way valve are respectively connected to the coolant outlet of the liquid-cooled condenser, the inlet of the first water pump, the inlet of the second water pump and the coolant outlet of the battery heat exchanger. The first water pump, the second water pump, the first four-way valve and the second four-way valve are integrated and assembled on the coolant flow channel plate. Both the refrigerant side and the coolant side adopt an integrated structure. The integrated structure has a reasonable and compact layout, which eliminates the pipes connecting the integrated parts, saves space, and facilitates production and assembly, reducing costs.

[0011] Furthermore, the compressor's air outlet is connected to the liquid-cooled condenser's refrigerant inlet via a refrigerant pipe, and the battery heat exchanger's refrigerant outlet is connected to the compressor's air inlet via a refrigerant pipe. The radiator's coolant inlet is connected to the outlet of the first water pump via a water pipe and / or the coolant flow plate, and the radiator's coolant outlet is connected to the inlet of the first four-way valve via a water pipe and / or the coolant flow plate. This simple and reliable connection between the compressor and radiator in the thermal management unit facilitates assembly of the thermal management unit and is relatively cost-effective.

[0012] Preferably, the liquid-cooled condenser is a water-cooled condenser; the radiator is a finned radiator; the cooling fan is an electronic fan; the first and second four-way valves are both electronic four-way valves; and the compressor is an electric compressor. The water-cooled condenser ensures efficient heat exchange between the coolant and the refrigerant; the finned radiator ensures efficient heat exchange between the thermal management unit and the outside world; and the electronic fan, electronic four-way valve, and electric compressor facilitate control and adjustment of the thermal management unit's cooling mode, heating mode, and natural air cooling mode.

[0013] Beneficial effects:

[0014] 1. The thermal management unit of the energy storage power station of the present invention can first complete the assembly and performance testing of each group of thermal management units on the assembly line in the production workshop to ensure the accuracy, consistency and stability of the assembly and the overall quality of the thermal management units. Then, the rack assembly and the installation of each group of thermal management units on the rack are completed on-site at the energy storage power station. The on-site assembly is simple and convenient, greatly reducing the assembly difficulty, assembly time and production costs.

[0015] 2. In the thermal management unit of the energy storage power station of the present invention, if a problem occurs in a thermal management unit, the corresponding thermal management unit can be stopped, and the remaining normal thermal management units can work at full load, ensuring the normal operation of the energy storage power station without interruption. The thermal management unit with a problem can be repaired by removing parts or directly replacing the entire thermal management unit, which is convenient and hassle-free.

[0016] 3. The thermal management unit of the energy storage power station of the present invention, an integrated platform-based thermal management unit, can significantly shorten the development cycle of subsequent new projects and reduce the development costs of assembly products;

[0017] 4. In the thermal management unit of the energy storage power station of the present invention, the coolant in the radiator absorbs heat from the external environment, and the coolant then exchanges heat with the refrigerant through the liquid-cooled condenser, which greatly reduces the use of refrigerant, reduces costs, and reduces the time for refrigerant filling; the heating mode uses the coolant to absorb heat from the outside through the radiator, which greatly reduces the occurrence of frosting, ensures the normal use of the battery under conditions of low external ambient temperature and high humidity, and improves the service life of the battery; when the external ambient temperature is not high but the energy storage power station has cooling needs, the thermal management unit can enter the natural wind cooling mode, the refrigerant side does not work, and the energy storage power station is cooled by air-cooling the radiator coolant, which greatly reduces the working time of the compressor in spring and autumn, increases the life of the compressor, saves energy loss, and reduces the cost of product use; by controlling the first four-way valve and the second four-way valve, the conversion between the cooling mode, heating mode and natural wind cooling mode of the thermal management unit can be realized, which is convenient and intelligent.

[0018] 5. The thermal management unit of the energy storage power station of the present invention has a high degree of integration and a high heat exchange efficiency of the thermal management unit, which greatly reduces the volume and floor space of the thermal management unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the thermal management unit of the energy storage power station of the present invention;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the thermal management unit of the energy storage power station of the present invention from another angle;

[0022] Figure 3 is a schematic diagram of the three-dimensional structure of the thermal management unit of the present invention;

[0023] Figure 4 is a schematic diagram of the principle of the cooling mode of the thermal management unit of the present invention;

[0024] Figure 5 is a schematic diagram of the principle of the heating mode of the thermal management unit of the present invention;

[0025] Figure 6 is a schematic diagram of the principle of the natural air cooling mode of the thermal management unit of the present invention;

[0026] In the figure: 1. Rack, 1-1. Support plate, 2. Coolant inlet main pipe, 3. Coolant outlet main pipe, 4. Thermal management unit, 4-1. Shell, 4-1-1. Base plate, 4-1-2. Mesh plate, 4-2. Compressor, 4-3. Liquid-cooled condenser, 4-4. Throttling device, 4-5. Battery heat exchanger, 4-6. Cooling fan, 4-7. Radiator, 4-8. First four-way valve, 4-9. Second four-way valve, 4-10. First water pump, 4-11. Second water pump, 4-12. Coolant inlet branch pipe, 4-13. Coolant outlet branch pipe, 4-14. Refrigerant pipe, 4-15. Water pipe, 4-16. Refrigerant flow plate, 4-17. Coolant flow plate, 5. Rehydration kettle. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 6As shown, a thermal management unit of an energy storage power station includes a frame 1, a coolant inlet main pipe 2, a coolant outlet main pipe 3 and at least two sets of thermal management units 4, the thermal management unit 4 includes a shell 4-1, and a compressor 4-2, a liquid-cooled condenser 4-3, a throttling device 4-4, a battery heat exchanger 4-5, a cooling fan 4-6, a radiator 4-7, a first four-way valve 4-8, a second four-way valve 4-9, a first water pump 4-10, a second water pump 4-11, a coolant inlet branch pipe 4-12 and a coolant outlet branch pipe 4-13, the cooling fan 4-6 is used to dissipate heat to the radiator 4-7; the compressor 4-2, the liquid-cooled condenser 4-3, the throttling device 4-4, the battery heat exchanger 4-5 and the compressor 4-2 are connected in sequence to form a refrigerant circulation loop; the four ports of the first four-way valve 4-8 are respectively connected to the coolant inlet branch pipe 4-12, the liquid-cooled condenser The cooling liquid inlet of the condenser 4-3, the cooling liquid inlet of the battery heat exchanger 4-5 and the cooling liquid outlet of the radiator 4-7 are connected; the four ports of the second four-way valve 4-9 are respectively connected to the cooling liquid outlet of the liquid-cooled condenser 4-3, the inlet of the first water pump 4-10, the inlet of the second water pump 4-11 and the cooling liquid outlet of the battery heat exchanger 4-5; the outlet of the first water pump 4-10 is connected to the cooling liquid inlet of the radiator 4-7, and the outlet of the second water pump 4-11 is connected to the cooling liquid outlet branch pipe 4-13; at least two groups of the thermal management units 4 are detachably arranged on the rack 1, the cooling liquid inlet branch pipe 4-12 is connected to the cooling liquid inlet main pipe 2, and the cooling liquid outlet branch pipe 4-13 is connected to the cooling liquid outlet main pipe 3; the cooling liquid inlet main pipe 2 is connected to the cooling liquid outlet of the energy storage power station, and the cooling liquid outlet main pipe 3 is connected to the cooling liquid inlet of the energy storage power station.

[0029] In order to reduce the operation of adding coolant to the thermal management unit and reduce maintenance costs, in this embodiment, Figure 1 and Figure 2 As shown, a rehydration kettle 5 is provided on the rack 1, and the rehydration kettle 5 is connected to the coolant water inlet main pipe 2. The rehydration kettle 5 is used to replenish coolant to the thermal management unit.

[0030] In order to make the spatial layout of the thermal management unit reasonable and reliable, reduce the floor space, and facilitate the installation and removal of the thermal management unit 4, in this embodiment, as shown in FIG. Figure 1 and Figure 2 As shown, the rack 1 is provided with a plurality of support plates 1-1 in sequence from bottom to top, and an installation space is formed between adjacent support plates 1-1. At least two groups of the thermal management units 4 are detachably arranged in the corresponding installation space in sequence from bottom to top; the rehydration water bottle 5 is arranged on the top of the rack 1.

[0031] In order to optimize the thermal management unit 4, in this embodiment, as Figures 3 to 6As shown, the shell 4-1 includes a bottom plate 4-1-1 and mesh plates 4-1-2 located around the bottom plate 4-1-1, and the mesh plates 4-1-2 around the bottom plate 4-1-1 enclose a storage space. The cooling fan 4-6 is located outside the storage space. The compressor 4-2, liquid-cooled condenser 4-3, throttling device 4-4, battery heat exchanger 4-5, radiator 4-7, first four-way valve 4-8, second four-way valve 4-9, first water pump 4-10 and second water pump 4-11 are all located inside the storage space. The coolant inlet branch pipe 4-12 and The coolant outlet branch pipe 4-13 extends from the inside of the accommodating space to the outside; the thermal management unit 4 also includes a refrigerant flow channel plate 4-16 and a coolant flow channel plate 4-17, the refrigerant flow channel plate 4-16 is used to connect the refrigerant outlet of the liquid-cooled condenser 4-3 with the inlet of the throttling device 4-4, and the outlet of the throttling device 4-4 is connected to the refrigerant inlet of the battery heat exchanger 4-5, the liquid-cooled condenser 4-3, the throttling device 4-4 and the battery heat exchanger 4-5 are integrated and assembled on the refrigerant flow channel plate 4-16; the coolant flow channel plate 4-17 Used to connect the two corresponding ports of the first four-way valve 4-8 to the coolant inlet of the liquid-cooled condenser 4-3 and the coolant inlet of the battery heat exchanger 4-5, respectively, and the four ports of the second four-way valve 4-9 to the coolant outlet of the liquid-cooled condenser 4-3, the inlet of the first water pump 4-10, the inlet of the second water pump 4-11, and the coolant outlet of the battery heat exchanger 4-5, respectively. The first water pump 4-10, the second water pump 4-11, the first four-way valve 4-8 and the second four-way valve 4-9 are integrated and assembled on the coolant flow channel plate 4-17; The air outlet of the compressor 4-2 is connected to the refrigerant inlet of the liquid-cooled condenser 4-3 via a refrigerant pipe 4-14, and the refrigerant outlet of the battery heat exchanger 4-5 is connected to the air inlet of the compressor 4-2 via a refrigerant pipe 4-14. The coolant inlet of the radiator 4-7 is connected to the outlet of the first water pump 4-10 via a water pipe 4-15 and the coolant flow plate 4-17, and the coolant outlet of the radiator 4-7 is connected to the inlet of the first four-way valve 4-8 via a water pipe 4-15 and the coolant flow plate 4-17. In other words, both the refrigerant side and the coolant side adopt an integrated structure. The integrated structure has a reasonable and compact layout, eliminates the need for connecting pipes between integrated components, saves space, facilitates production and assembly, and reduces costs.

[0032] For the convenience of description and understanding, in this embodiment, Figures 4-6As shown, the four ports of the first four-way valve 4-8 are port A, port B, port C and port D respectively. Port A of the first four-way valve 4-8 is connected to the coolant inlet of the battery heat exchanger 4-5, port B of the first four-way valve 4-8 is connected to the coolant outlet of the radiator 4-7, port C of the first four-way valve 4-8 is connected to the coolant inlet branch pipe 4-12, and port D of the first four-way valve 4-8 is connected to the coolant inlet of the liquid-cooled condenser 4-3; the four ports of the second four-way valve 4-9 are port A, port B, port C and port D respectively. Port A of the second four-way valve 4-9 is connected to the coolant outlet of the battery heat exchanger 4-5, port B of the second four-way valve 4-9 is connected to the inlet of the first water pump 4-10, port C of the second four-way valve 4-9 is connected to the inlet of the second water pump 4-11, and port D of the second four-way valve 4-9 is connected to the coolant outlet of the liquid-cooled condenser 4-3.

[0033] Specifically, in this embodiment, the liquid-cooled condenser 4-3 is a water-cooled condenser; the radiator 4-7 is a fin radiator; the cooling fan 4-6 is an electronic fan; the first four-way valve 4-8 and the second four-way valve 4-9 are both electronic four-way valves, and the compressor 4-2 is an electric compressor.

[0034] This application first platforms small thermal management units 4, for example, each group of thermal management units 4 has a cooling capacity range of 8KW-12KW and a heating capacity range of 4-6KW; then, based on the customer's cooling needs, the small platform thermal management units 4 are combined to meet the customer's needs. For example, if the customer's cooling capacity is 40KW, four groups of thermal management units 4 can be used to form a large thermal management unit. The number of thermal management units 4 in this embodiment is four, and the number of thermal management units 4 is set reasonably. When one group of thermal management units 4 is maintained, the other three groups of thermal management units 4 are fully loaded, ensuring that the thermal management unit operates normally without shutting down.

[0035] The assembly process of the thermal management unit of the energy storage power station is as follows:

[0036] First, complete the assembly and performance testing of each group of thermal management units 4 in the production workshop, then complete the assembly of the rack 1 on site at the energy storage power station, then install the rehydration water bottle 5 on the top of the rack 1, and connect the rehydration water bottle 5 to the coolant water inlet main pipe 2, then install each group of thermal management units 4 in the corresponding installation space from top to bottom, and connect the coolant water inlet branch pipe 4-12 to the coolant water inlet main pipe 2, and connect the coolant water outlet branch pipe 4-13 to the coolant water outlet main pipe 3, then connect the coolant water inlet main pipe 2 to the coolant outlet of the energy storage power station, and connect the coolant water outlet main pipe 3 to the coolant inlet of the energy storage power station.

[0037] When one of the thermal management units 4 needs maintenance, the other three thermal management units 4 can operate at full load, ensuring that the thermal management unit operates normally without stopping.

[0038] The operation mode of the thermal management unit of the energy storage power station is as follows:

[0039] Cooling mode (when the ambient temperature is high, such as 20-40℃): When the energy storage power station has a cooling demand, the thermal management unit enters the cooling mode. The operating conditions are as follows: the first four-way valve 4-8 and the second four-way valve 4-9 are operated to Figure 4 In the position shown, the refrigerant (low-temperature, low-pressure gas) is pressurized by the compressor 4-2 (the refrigerant is a high-temperature, high-pressure gas) and enters the liquid-cooled condenser 4-3. After transferring heat to the coolant in the liquid-cooled condenser 4-3, the refrigerant (high-temperature, high-pressure liquid) flows into the throttling device 4-4 for throttling and pressure reduction (the refrigerant is a low-temperature, low-pressure gas-liquid two-phase mixture), and then enters the battery heat exchanger 4-5 to absorb the heat of the coolant in the battery heat exchanger 4-5. The refrigerant (the refrigerant is a low-temperature, low-pressure gas) enters the compressor 4-2 and is pressurized again, thereby completing the circulation on the refrigerant side; the coolant heated in the liquid-cooled condenser 4-3 enters the first water pump 4-10 through the D port and the B port of the second four-way valve 4-9, and enters the radiator 4-7 through the first water pump 4-10. The medium-temperature coolant passes through the flat tube of the radiator 4-7. The fins and the cooling fan 4-6 transfer heat to the outside air, and the cooled coolant then enters the liquid-cooled condenser 4-3 through the B port and the D port of the first four-way valve 4-8 to absorb heat. In this way, the coolant completes the task of dissipating heat in the external environment; the coolant cooled in the battery heat exchanger 4-5 passes through the A port and the C port of the second four-way valve 4-9 and enters the second water pump 4-11, and then flows into the coolant outlet branch pipe 4-13, the coolant outlet main pipe 3 and the coolant inlet of the energy storage power station in sequence through the second water pump 4-11 to dissipate heat for the energy storage power station. The coolant after absorbing heat flows out from the coolant outlet of the energy storage power station, and then flows through the C port and the A port of the first four-way valve 4-8 into the battery heat exchanger 4-5 to be cooled by the refrigerant. In this way, the coolant completes the task of dissipating heat for the energy storage power station.

[0040] Heating mode (when the ambient temperature is low, such as -30-5℃): When the energy storage power station has a heating demand, the thermal management unit enters the heating mode. The operating conditions are as follows: the first four-way valve 4-8 and the second four-way valve 4-9 are operated to Figure 5The position shown, the circulation on the refrigerant side is the same as the above-mentioned refrigeration mode, and will not be repeated here; the circulation on the coolant side is as follows: the coolant that absorbs heat in the liquid-cooled condenser 4-3 enters the second water pump 4-11 through the D port and C port of the second four-way valve 4-9, and then flows into the coolant outlet branch pipe 4-13, the coolant outlet main pipe 3 and the coolant inlet of the energy storage power station in sequence through the second water pump 4-11 to heat the energy storage power station. The coolant after releasing heat flows out from the coolant outlet of the energy storage power station, and then flows through the C port and D port of the first four-way valve 4-8 into the liquid-cooled condenser 4-3 to absorb heat. The coolant completes the task of heating the energy storage power station; the coolant cooled in the battery heat exchanger 4-5 flows through the A and B ports of the second four-way valve 4-9 into the first water pump 4-10, and then enters the radiator 4-7 through the first water pump 4-10. The low-temperature coolant absorbs heat from the outside air through the flat tubes and fins in the radiator 4-7 and the cooling fan 4-6. The coolant after absorbing the heat then enters the battery heat exchanger 4-5 through the B and A ports of the first four-way valve 4-8 to transfer the heat to the refrigerant. In this way, the coolant completes the task of absorbing heat from the external environment.

[0041] Natural air cooling mode (when the ambient temperature is suitable, for example: 5-20℃): When the energy storage power station has a heat dissipation demand and the ambient temperature is low, the thermal management unit enters the natural air cooling mode, and the first four-way valve 4-8 and the second four-way valve 4-9 are operated to Figure 6 In the position shown, the refrigerant side is not working; the medium-temperature coolant flowing out of the coolant outlet of the energy storage power station flows through the coolant inlet main pipe 2, the coolant inlet branch pipe 4-12, and the C and A ports of the first four-way valve 4-8 in sequence, and then enters the battery heat exchanger 4-5. It then flows through the A and B ports of the second four-way valve 4-9 and enters the radiator 4-7 through the first water pump 4-10. The medium-temperature coolant transfers heat to the outside air through the flat tubes and fins in the radiator 4-7 and the cooling fan 4-6. The cooled coolant flows through the B and D ports of the first four-way valve 4-8 and flows into the liquid-cooled condenser 4-3. It then flows through the D and C ports of the second four-way valve 4-9 and enters the second water pump 4-11. It then flows through the coolant outlet branch pipe 4-13 and the coolant outlet main pipe 3 in sequence into the coolant inlet of the energy storage power station. The coolant absorbs heat from the energy storage power station and then flows out, thus completing the task of cooling the batteries.

[0042] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A thermal management unit for an energy storage power station, characterized by: The invention comprises a frame (1), a coolant water inlet main pipe (2), a coolant water outlet main pipe (3) and at least two sets of thermal management units (4), wherein the thermal management unit (4) comprises a shell (4-1), and a compressor (4-2) arranged on the shell (4-1), a liquid-cooled condenser (4-3), a throttling device (4-4), a battery heat exchanger (4-5), a cooling fan (4-6), a radiator (4-7), a first four-way valve (4-8), a second four-way valve (4-9), a first water pump (4-10), a second water pump (4-11), a coolant water inlet branch pipe (4-12) and a coolant water outlet branch pipe (4-13), wherein the cooling fan (4-6) is used to dissipate heat for the radiator (4-7); the compressor (4-2), the liquid-cooled condenser (4-3), the throttling device (4-4) , a battery heat exchanger (4-5) and a compressor (4-2) are connected in sequence to form a refrigerant circulation loop; the four ports of the first four-way valve (4-8) are respectively connected to the coolant water inlet branch pipe (4-12), the coolant inlet of the liquid-cooled condenser (4-3), the coolant inlet of the battery heat exchanger (4-5) and the coolant outlet of the radiator (4-7); the four ports of the second four-way valve (4-9) are respectively connected to the coolant outlet of the liquid-cooled condenser (4-3), the inlet of the first water pump (4-10), the inlet of the second water pump (4-11) and the coolant outlet of the battery heat exchanger (4-5); the outlet of the first water pump (4-10) is connected to the coolant inlet of the radiator (4-7), and the outlet of the second water pump (4-11) is connected to the coolant water outlet branch pipe (4-13); At least two groups of the thermal management units (4) are detachably arranged on the frame (1); the coolant inlet branch pipe (4-12) is connected to the coolant inlet main pipe (2); the coolant outlet branch pipe (4-13) is connected to the coolant outlet main pipe (3); the coolant inlet main pipe (2) is connected to the coolant outlet of the energy storage power station, and the coolant outlet main pipe (3) is connected to the coolant inlet of the energy storage power station.

2. The thermal management unit of the energy storage power station according to claim 1, characterized in that: A rehydration kettle (5) is provided on the frame (1), and the rehydration kettle (5) is connected to the coolant water inlet main pipe (2). The rehydration kettle (5) is used to replenish coolant to the thermal management unit.

3. The thermal management unit of the energy storage power station according to claim 2, characterized in that: The rack (1) is provided with a plurality of support plates (1-1) in sequence from bottom to top, and an installation space is formed between adjacent support plates (1-1). At least two groups of the thermal management units (4) are detachably arranged in the corresponding installation space in sequence from bottom to top, and the rehydration water bottle (5) is arranged on the top of the rack (1).

4. The thermal management unit of the energy storage power station according to claim 3, characterized in that: The number of the thermal management units (4) is 4 groups.

5. The thermal management unit of the energy storage power station according to any one of claims 1 to 4, characterized in that: The shell (4-1) includes a base plate (4-1-1) and mesh plates (4-1-2) located around the base plate (4-1-1), the mesh plates (4-1-2) around the base plate (4-1-1), and a storage space is enclosed by the mesh plates (4-1-2). The cooling fan (4-6) is located outside the storage space. The compressor (4-2), the liquid-cooled condenser (4-3), the throttling device (4-4), the battery heat exchanger (4-5), the radiator (4-7), the first four-way valve (4-8), the second four-way valve (4-9), the first water pump (4-10) and the second water pump (4-11) are all located inside the storage space. The coolant inlet branch pipe (4-12) and the coolant outlet branch pipe (4-13) extend from the inside of the storage space to the outside.

6. The thermal management unit of the energy storage power station according to any one of claims 1 to 4, characterized in that: The thermal management unit (4) further comprises a refrigerant flow channel plate (4-16) and a coolant flow channel plate (4-17), wherein the refrigerant flow channel plate (4-16) is used to connect the refrigerant outlet of the liquid-cooled condenser (4-3) to the inlet of the throttling device (4-4), and the outlet of the throttling device (4-4) to the refrigerant inlet of the battery heat exchanger (4-5), and the liquid-cooled condenser (4-3), the throttling device (4-4) and the battery heat exchanger (4-5) are integrated and assembled on the refrigerant flow channel plate (4-16); the coolant flow channel plate (4-17) is used to connect the first four-way valve (4-8 ) are respectively connected to the coolant inlet of the liquid-cooled condenser (4-3) and the coolant inlet of the battery heat exchanger (4-5), and the four ports of the second four-way valve (4-9) are respectively connected to the coolant outlet of the liquid-cooled condenser (4-3), the inlet of the first water pump (4-10), the inlet of the second water pump (4-11) and the coolant outlet of the battery heat exchanger (4-5), and the first water pump (4-10), the second water pump (4-11), the first four-way valve (4-8) and the second four-way valve (4-9) are integrated and assembled on the coolant flow channel plate (4-17).

7. The thermal management unit of the energy storage power station according to claim 6, characterized in that: The air outlet of the compressor (4-2) is connected to the refrigerant inlet of the liquid-cooled condenser (4-3) through the refrigerant pipe (4-14), and the refrigerant outlet of the battery heat exchanger (4-5) is connected to the air inlet of the compressor (4-2) through the refrigerant pipe (4-14); the coolant inlet of the radiator (4-7) is connected to the outlet of the first water pump (4-10) through the water pipe (4-15) or through the coolant flow channel plate (4-17), and the coolant outlet of the radiator (4-7) is connected to the inlet of the first four-way valve (4-8) through the water pipe (4-15) or through the coolant flow channel plate (4-17).

8. The thermal management unit of the energy storage power station according to any one of claims 1 to 4, characterized in that: The liquid-cooled condenser (4-3) is a water-cooled condenser; the radiator (4-7) is a finned radiator; the cooling fan (4-6) is an electronic fan; the first four-way valve (4-8) and the second four-way valve (4-9) are both electronic four-way valves; and the compressor (4-2) is an electric compressor.

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