Centralized energy storage heat management system

Abstract

The invention discloses a centralized energy storage heat management system which comprises a refrigeration module, a first cooling module and a second cooling module. The refrigeration module is used for circulation of refrigerants and comprises a compressor used for compressing the refrigerants, a condenser with a first inlet communicating with an exhaust port of the compressor, a first throttling element with an inlet connected to a first outlet of the condenser and a second throttling element with a second inlet communicating with an outlet of the first throttling element. A first outlet of the evaporator is connected to an air inlet of the compressor. The first cooling module is coupled to the refrigeration module through the evaporator and comprises a first cooling liquid loop so as to dissipate heat of the first to-be-cooled module. The second cooling module is coupled to the refrigeration module through the condenser and comprises a second cooling liquid loop so as to dissipate heat of the second to-be-cooled module. The same heat management system is arranged for different to-be-cooled modules in the energy storage system, the overall size of the heat management system can be reduced, operation is simplified, and the system stability is improved.

Description

Technical Field

[0001] The present invention relates to the field of thermal management technology, and in particular to a centralized energy storage thermal management system. Background Art

[0002] Containerized Energy Storage System (CESS) is a complex integrated power unit that integrates battery cabinets, battery management systems (BMS), power exchange devices (PCS), energy management systems (EMS), container dynamic environment monitoring systems and other related equipment according to certain application requirements. Energy storage containers use containers as carriers, which have the characteristics of simplifying infrastructure construction costs, occupying a relatively small area, short construction period, high degree of modularization, and easy transportation and installation. It can be used in thermal, wind, solar power stations or islands, communities, schools, scientific research institutions, factories, large load centers and other applications.

[0003] In order to improve the performance, life, safety, etc. of the energy storage system, thermal management is required in the energy storage system. Thermal management refers to the management and control of the temperature of the total system, discrete components or their environment, with the purpose of maintaining the normal operation of each component or improving its performance or life. For container energy storage systems, battery cabinets and power exchange devices generate high heat during operation and need to be cooled.

[0004] In existing containerized energy storage systems, different thermal management systems are usually arranged at the battery cabinet and power exchange device locations. For example, a liquid cooling system is set at the battery cell end, and an additional liquid cooling system is configured at the power exchange device, which makes the system redundant and costly. At the same time, due to the large volume of the existing compressor assembly, the two liquid cooling systems will also cause the integrated energy storage thermal management unit to be larger in size, thereby reducing the layout space of the energy storage battery. In addition, the traditional positive displacement compressors currently used in energy storage thermal management products cannot achieve the function of replenishing air and increasing enthalpy, and cannot achieve further improvement in energy efficiency. Moreover, most of the existing energy storage thermal management systems are one set of cooling devices corresponding to one set of equipment to be cooled. When encountering multiple energy storage cabinets, each energy storage cabinet needs to be equipped with a separate liquid cooling system, which has a high instability factor and is a challenge to the safe operation of the system. Summary of the invention

[0005] In view of some or all of the problems in the prior art, the present invention provides a centralized energy storage thermal management system in a first aspect, comprising:

[0006] A refrigeration module, which is used for the circulation of a refrigerant, and comprises:

[0007] A compressor for compressing a refrigerant;

[0008] a condenser, a first inlet of which is in communication with an exhaust port of the compressor;

[0009] a first throttling element having an inlet connected to a first outlet of the condenser; and

[0010] an evaporator, a first inlet of which is in communication with the outlet of the first throttling element, and a first outlet of the evaporator is connected to an air inlet of the compressor;

[0011] A first cooling module, which is coupled to the refrigeration module via the evaporator, the first cooling module comprising a first coolant circuit to dissipate heat for a first module to be cooled; and

[0012] The second cooling module is coupled to the refrigeration module through the condenser, and the second cooling module includes a second cooling liquid circuit to dissipate heat for the second module to be cooled.

[0013] Furthermore, the compressor is an air-floating centrifugal refrigeration compressor, which comprises:

[0014] An electric motor comprising:

[0015] a housing having a first chamber and a second chamber respectively disposed at ends thereof; and

[0016] A rotor having a first groove disposed thereon, wherein the rotor introduces gas into the first groove to form an air film when rotating, so as to form a grooved air-floating radial bearing;

[0017] an impeller, arranged at an end of the rotor and located in the first chamber and / or the second chamber;

[0018] an air inlet, which is in communication with the air inlet of the first chamber;

[0019] an exhaust port communicating with the air outlet of the second chamber; and

[0020] The connecting pipe has two ends connected to the air outlet of the first chamber and the air inlet of the second chamber respectively.

[0021] Furthermore, the first throttling element includes an electronic expansion valve.

[0022] Furthermore, the refrigeration module further comprises a bypass valve, the inlet of the bypass valve is connected to the exhaust port of the air-floating centrifugal compressor, and the outlet of the bypass valve is connected to the air inlet of the air-floating centrifugal compressor.

[0023] Furthermore, the refrigeration module further includes:

[0024] an economizer, wherein a main inlet is connected to the outlet of the condenser, a main outlet is connected to the inlet of the first throttling element, and an auxiliary outlet is connected to the supplementary air inlet of the compressor; and

[0025] The inlet of the second throttling element is connected to the main outlet of the economizer, and the outlet of the second throttling element is connected to the auxiliary inlet of the economizer.

[0026] Furthermore, the first cooling module comprises:

[0027] A first water pump, whose outlet is connected to the second inlet of the evaporator, is used to provide power for the first coolant. The first coolant flows through the evaporator in turn to exchange heat with the refrigerant, and the first module to be cooled dissipates heat before returning to the first water pump to form a first coolant circuit.

[0028] Furthermore, the first cooling module includes a plurality of first coolant branches, each of which is arranged in parallel, each first coolant branch is used to dissipate heat for a first module to be cooled, and each first coolant branch includes a first water pump, and the outlet of the first water pump is connected to the evaporator through a one-way valve.

[0029] Furthermore, the second cooling module comprises:

[0030] a heat exchanger, the inlet of which is in communication with the second outlet of the condenser, and the outlet of which is connected to a second water pump; and

[0031] A second water pump, whose outlet is connected to the second inlet of the condenser, is used to provide power for the second coolant. The second coolant flows through the condenser, the heat exchanger, and the second module to be cooled in sequence and then returns to the second water pump to form a second coolant loop.

[0032] Furthermore, the second cooling module includes a plurality of second coolant branches, each of which is arranged in parallel, each second coolant branch is used to dissipate heat for a second module to be cooled, and each second coolant branch includes a heat exchanger and a second water pump.

[0033] Furthermore, the centralized energy storage thermal management system also includes at least one temperature sensor and at least one pressure sensor, and the temperature sensor and / or pressure sensor are arranged at the exhaust port, and / or the air inlet, and / or the air supply inlet, and / or the first and second coolant circuits of the compressor.

[0034] Furthermore, the energy storage thermal management system also includes a fan, which is arranged at the heat exchanger and is used to introduce normal temperature air into the heat exchanger to achieve heat exchange.

[0035] Based on the centralized energy storage thermal management system as described above, a second aspect of the present invention provides a container energy storage system, which includes the centralized energy storage thermal management system as described above.

[0036] The present invention provides a centralized energy storage thermal management system, which sets the same thermal management system for different modules in the energy storage system that need heat dissipation, such as battery cells and power exchange devices, which can reduce the overall volume of the thermal management system, that is, reduce the space occupied by the thermal management system in a single box-type energy storage system, reduce costs, and simplify operations. In addition, the centralized energy storage thermal management system may include multiple branches, so that multiple energy storage cabinets can be thermally managed at the same time, and the control is simple and efficient. At the same time, it adopts a jet reheat compressor system design, the compressor has a large power density, and the volume and weight of the compressor itself are reduced. Based on the compressor, it can be matched with multiple different system solutions such as air cooling, liquid cooling, air replenishment, bypass, multi-connection, centralized, etc., with a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To further illustrate the above and other advantages and features of various embodiments of the present invention, a more specific description of various embodiments of the present invention will be presented with reference to the accompanying drawings. It will be understood that these drawings only depict typical embodiments of the present invention and are therefore not to be considered as limiting the scope thereof. In the accompanying drawings, for clarity, identical or corresponding parts will be represented by identical or similar reference numerals.

[0038] Figure 1 A schematic structural diagram of a centralized energy storage thermal management system according to an embodiment of the present invention is shown;

[0039] Figure 2 A schematic structural diagram of a centralized energy storage thermal management system with a bypass valve according to an embodiment of the present invention is shown;

[0040] Figure 3 A schematic diagram showing the structure of a centralized energy storage thermal management system with a bypass valve and an economizer according to an embodiment of the present invention; and

[0041] Figure 4a-4e Schematic diagrams showing the structures of compressors in different embodiments of the present invention.

[0042] Reference numerals list

[0043] 001 Refrigeration Module

[0044] 002 First cooling module

[0045] 003 Second cooling module

[0046] 101 Compressor

[0047] 111 Air bearing

[0048] 112 Impeller

[0049] 113 Rotor

[0050] 114 Thrust plate

[0051] 115 Thrust bearing

[0052] 102 Condenser

[0053] 103 First throttle element

[0054] 104 Evaporator

[0055] 105 Bypass valve

[0056] 106 Economizer

[0057] 107 Second throttle element

[0058] 2011, 2012, ..., 201n first module to be cooled

[0059] 2021, 2022, ..., 202n first water pump

[0060] 2031, 2032, ..., 203n one-way valve

[0061] 3011, 3012, ..., 301m heat exchanger

[0062] 3021, 3022, ..., 302m second module to be cooled

[0063] 3031, 3032, ..., 303m Second water pump

[0064] 3041, 3042, ..., 304m fans DETAILED DESCRIPTION

[0065] In the following description, the present invention is described with reference to various embodiments. However, those skilled in the art will recognize that various embodiments can be implemented without one or more specific details or with other replacement and / or additional methods, materials or components. In other cases, well-known structures, materials or operations are not shown or described in detail to avoid blurring the inventive point of the present invention. Similarly, for the purpose of explanation, specific quantities, materials and configurations are set forth to provide a comprehensive understanding of embodiments of the present invention. However, the present invention is not limited to these specific details. In addition, it should be understood that the various embodiments shown in the drawings are illustrative representations and are not necessarily drawn in correct proportions.

[0066] In this specification, reference to "one embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. The phrase "in one embodiment" appearing in various places in this specification does not necessarily all refer to the same embodiment.

[0067] In view of the shortcomings of existing energy storage thermal management products, the present invention uses the same thermal management system to simultaneously adjust the heat of different heat-generating modules of the energy storage system, such as power exchange modules, battery cells, etc., to achieve a centralized energy storage thermal management system, so as to effectively reduce the space occupied by the thermal management system in a single box-type energy storage system. At the same time, the entire thermal management system has a simple structure, simple and efficient operation, and low cost. In addition, the energy storage thermal management system adopts a jet enthalpy increase compressor system design, which can also effectively improve the overall energy efficiency of the system.

[0068] In the embodiments of the present invention, the throttling elements, including the first throttling element, the second throttling element, etc., refer to devices or elements used to reduce the gas pressure to achieve the purpose of evaporation, for example, they may be: an expansion valve, a capillary tube, a throttling tube, etc.

[0069] The scheme of the present invention is further described below in conjunction with the accompanying drawings of the embodiments.

[0070] Figure 1 FIG. 1 is a schematic diagram showing the structure of a centralized energy storage thermal management system according to an embodiment of the present invention. Figure 1 As shown, a centralized energy storage thermal management system includes a refrigeration module 001, a first cooling module 002 and a second cooling module 003. The refrigeration module 001 is used for the circulation of refrigerant, that is, to circulate and provide compressed and condensed refrigerant. The first cooling module 002 is coupled to the refrigeration module 001 through the evaporator 104. The first cooling module 002 includes a first coolant circuit, which is mainly used to dissipate heat from the first module to be cooled 201, such as a battery cell, etc. The first coolant circuit achieves heat exchange with the refrigerant of the refrigeration module through the evaporator 104. The second cooling module 003 is coupled to the refrigeration module 001 through the condenser 102. The second cooling module 003 includes a second coolant circuit, which is mainly used to dissipate heat from the second module to be cooled 302, such as a power exchange module, etc. The second coolant circuit achieves heat exchange with the refrigerant of the refrigeration module through the condenser 102.

[0071] like Figure 1As shown, the refrigeration module 001 includes a compressor 101, a condenser 102, a first throttling element 103 and an evaporator 104. The compressor 101 is used to compress the refrigerant, the exhaust port of the compressor 101 is connected to the first inlet of the condenser 102, the outlet of the condenser 102 is connected to the inlet of the first throttling element 103, the outlet of the first throttling element 103 is connected to the first inlet of the evaporator 104, and the first outlet of the evaporator 104 is connected to the air inlet of the compressor 101. After being compressed by the compressor 101, the refrigerant enters the condenser 102 to exchange heat with the second coolant of the second cooling module 003, and then enters the first throttling element 103, the first throttling element 103 throttles the refrigerant, and the throttled refrigerant rapidly expands and evaporates, and the refrigerant after throttling and expansion enters the evaporator 104 to exchange heat with the first coolant of the first cooling module 002, and the refrigerant after heat exchange returns to the compressor 101 again.

[0072] In one embodiment of the present invention, Figure 2 As shown, a bypass valve 105 may also be provided between the air inlet and the exhaust port of the compressor 101. Thus, when the centralized energy storage thermal management system is working, if the bypass valve 105 is opened, a small portion of high-temperature and high-pressure gas will be throttled into low-temperature and low-pressure gas through the bypass valve 105 and then flow to the air inlet of the compressor 101, and merge with the compressor return air of the system and flow back to the compressor 101, thereby reducing the power consumption of the compressor 101.

[0073] In one embodiment of the present invention, Figure 3As shown, the refrigeration module 001 also includes an air supply component, which includes an economizer 106 and a second throttling element 107. The economizer 106 includes a main road inlet, a main road outlet, an auxiliary road inlet and an auxiliary road outlet. The main road inlet is connected to the outlet of the condenser 102, the main road outlet is connected to the inlet of the first throttling element 103, the auxiliary road inlet is connected to the outlet of the second throttling element 107, and the auxiliary road outlet is connected to the air supply inlet of the compressor 101. The inlet of the second throttling element 107 is connected to the main road outlet of the economizer 106. When the centralized energy storage thermal management system is working, after the high-temperature and high-pressure gas is discharged from the compressor 101, it is condensed into a high-temperature and high-pressure liquid in the condenser 102, and when passing through the economizer 106, it will first exchange heat with the refrigerant in the auxiliary circuit to further increase the degree of supercooling to ensure that all the refrigerants are liquid. At the same time, a branch circuit is re-introduced on the main circuit, and the high-temperature and high-pressure liquid first passes through the second throttling element 107 to become a low-temperature and low-pressure liquid, and then passes through the auxiliary circuit of the economizer 106 to exchange heat with the refrigerant in the main circuit to evaporate into a low-temperature and low-pressure gas and flow to the The high-temperature and high-pressure liquid remaining in the main circuit is further throttled into a low-temperature and low-pressure liquid in the first throttling element 103, and flows to the evaporator 104 to perform heat exchange with the first coolant to form a high-temperature and low-pressure gas, and finally flows back to the compressor 101 to be compressed into a high-temperature and high-pressure gas. When the bypass valve is opened, a small part of the high-temperature and low-pressure gas will be throttled into a low-temperature and low-pressure gas through the bypass valve and flow to the air inlet of the compressor 101, and merge with the compressor return air of the system and flow back to the compressor 101.

[0074] In one embodiment of the present invention, the compressor 101 includes a motor, an impeller, an air inlet, an air outlet, and a connecting pipe. The motor includes a rotor system, a stator, and a housing.

[0075] Figures 4a to 4eThe schematic diagram of the structure of the compressor in different embodiments of the present invention is shown. As shown in the figure, the rotor system of the motor includes a radial air bearing 111. When the motor shaft rotates, the radial air bearing inhales gas to form an air film to support the high-speed rotation of the rotor. At the same time, the thrust bearing (if any) also forms an air film, so that the thrust shaft and the bearing are not in contact, the bearing is almost free of wear, and the mechanical loss and noise can be greatly reduced or even eliminated. As shown in the figure, the impeller 112 is arranged at the end of the rotor 113, which is used to compress the low-temperature and low-pressure refrigerant gas from the evaporator to form a high-temperature and high-pressure refrigerant gas to be discharged into the condenser. Here, the terms "radial" and "axial" refer to the radial and axial directions of the rotor or its rotating shaft. In an embodiment of the present invention, the rotor system 113 includes two radial bearings, and there is a certain distance between the two radial bearings, and they can be symmetrically distributed on the rotor. In one embodiment of the present invention, the radial bearing adopts a foil-type dynamic pressure air bearing. When gas is introduced into the bearing position, an air film can be formed to achieve an air flotation effect.

[0076] In order to withstand the axial thrust generated during the operation of the compressor, in one embodiment of the present invention, a thrust plate 114 and a thrust bearing 115 are further provided in the rotor system. The thrust plate and the thrust bearing are optional. The thrust plate can be provided at any end of the rotor, or a thrust plate can be provided at each end of the rotor. When only one thrust plate is provided, a thrust bearing can be provided on both sides of the thrust plate, and the action surfaces of the two thrust bearings are both facing the thrust plate, so that the axial thrusts in different directions can be respectively borne. Specifically, the axial thrusts that the two thrust bearings can withstand are in opposite directions. When two thrust plates are provided, a thrust bearing can be provided on the opposite sides of the two thrust plates, or on the two sides away from each other, and the action surfaces of the two thrust bearings are both facing the thrust plate, so that the axial thrusts in different directions can be respectively borne. Specifically, the axial thrusts that the two thrust bearings can withstand are in opposite directions. In one embodiment of the present invention, the thrust bearing adopts a foil-type dynamic pressure air-floating bearing. When gas is introduced into the bearing position, an air film can be formed, thereby achieving an air-floating effect.

[0077] In addition, in different embodiments of the present invention, single-stage, double-stage or multi-stage impellers can be provided according to actual needs. Specifically, when only a single-stage impeller is provided, the impeller 112 can be provided at any end of the rotor, and the side provided with the impeller can be recorded as the high-pressure side, and the side without the impeller can be recorded as the low-pressure side. When a two-stage impeller is provided, the two impellers can be provided at both ends of the rotor respectively, or all of them can be provided at any end of the rotor. When they are provided at both ends of the rotor respectively, the side provided with the first-stage impeller can be recorded as the low-pressure side, and the side provided with the second-stage impeller can be recorded as the high-pressure side. When all of them are provided at one end of the rotor, the side provided with the impeller can be recorded as the high-pressure side, and the side without the impeller can be recorded as the low-pressure side. Similarly, when there are multiple impellers, the multiple impellers can be equally or unequally arranged at both ends of the rotor, or all of them can be arranged at any end of the rotor. When they are arranged at both ends of the rotor, the side with the previous impeller can be recorded as the low-pressure side, and the side with the next impeller can be recorded as the high-pressure side. When all of them are arranged at one end of the rotor, the side with the impeller can be recorded as the high-pressure side, and the side without the impeller can be recorded as the low-pressure side. Based on this, as shown in the figure, when the rotor rotates, a part of the high-pressure gas compressed by the impeller in the main gas path will enter the radial bearing on the high-pressure side under the action of pressure, and then enter the radial bearing on the low-pressure side through the air gap between the motor stator and the rotor, and return to the main gas path. When a thrust plate and a thrust bearing are provided, the high-pressure gas will also pass through the thrust bearing to form an air film to withstand the axial thrust. In order to effectively reduce the axial thrust on the thrust bearing, in one embodiment of the present invention, the impeller on the low-pressure side and the impeller on the high-pressure side are arranged back-to-back, so that the axial thrust directions of the impellers on the high-pressure side and the low-pressure side are opposite to each other to offset each other. In one embodiment of the present invention, the impeller is a closed impeller. In one embodiment of the present invention, the impeller is fixed to the rotor by a locking nut.

[0078] The first chamber and the second chamber are respectively arranged at the two ends of the interior of the shell, and the impeller is arranged in the first chamber and / or the second chamber. The air inlet of the first chamber is connected with the air inlet of the compressor, and it can also be understood that the air inlet is the air inlet of the first chamber. A connecting pipe is arranged between the first chamber and the second chamber, and the gas flows out from the air outlet of the first chamber and enters the connecting pipe, and then enters the second chamber through the air inlet of the second chamber. The air outlet of the second chamber is connected with the exhaust port of the compressor, and it can also be understood that the exhaust port is the air outlet of the second chamber. In an embodiment of the present invention, the first end cover and the second end cover are also arranged at the air outlet of the first chamber and the second chamber, respectively, and there are gaps between the first end cover and the second end cover and the rotor and the impeller, and the gas can enter the air bearing from the main gas path or return to the main gas path from the air bearing through these gaps. In addition, compression shells are respectively provided on the outer sides of both ends of the motor, and a sealing ring is provided between the compression shell and the impeller, and the sealing ring can significantly reduce the backflow effect from the impeller outlet to the inlet, which can further improve the efficiency of the compressor. In order to reduce the compression power consumption of the impeller, in one embodiment of the present invention, an air supply inlet is also provided on the connecting pipe to connect the exhaust gas from the economizer to cool the gas, thereby achieving the purpose of reducing the compression power consumption of the impeller and improving the efficiency of the system.

[0079] In one embodiment of the present invention, the first cooling module 002 adopts a liquid cooling mode. As shown in the figure, the first cooling module 002 includes a first water pump 2021. The outlet of the first water pump 2021 is connected to the second inlet of the evaporator 104. The first water pump 2021 is used to provide power for the first coolant, so that the first coolant flows through the evaporator 104 and the first module to be cooled 2011 in sequence and then returns to the first water pump 2021 to form a first coolant loop. The first coolant exchanges heat with the refrigerant in the evaporator 104 to form a coolant with a lower temperature, and when flowing through the first module to be cooled 201, it absorbs the heat generated by the first module to be cooled 2011, such as the battery cell, and dissipates the heat.

[0080] In one embodiment of the present invention, as shown in the figure, the first cooling module 002 can be provided with a multi-branch cooling source solution, that is, the first coolant circuit may include a plurality of first coolant branches, each of which is arranged in parallel, and each first coolant branch is used for a first module to be cooled 2011 to 201n, such as a battery cell for heat dissipation, and each first coolant branch includes a first water pump 2021 to 202n, and the outlet of the first water pump is connected to the evaporator 104 via a one-way valve 2031 to 203n.

[0081] In one embodiment of the present invention, the second cooling module 003 adopts a liquid cooling mode. As shown in the figure, the second cooling module 003 includes a heat exchanger 3011 and a second water pump 3031. The inlet of the heat exchanger 3011 is communicated with the second outlet of the condenser 102, and the outlet is connected to the second water pump 3031, and the outlet of the second water pump 3031 is connected to the second inlet of the condenser 102. The second water pump 3031 is used to provide power for the second coolant, and the second coolant flows through the condenser 102, the heat exchanger 3011, and the second module to be cooled 3021 in sequence and then returns to the second water pump 3031 to form a second coolant loop. The second coolant undergoes a first heat exchange with the coolant compressed by the compressor 101 in the condenser 102, and then enters the heat exchanger 3011 to undergo a second heat exchange with the surrounding air to further reduce the temperature, and then flows through the power exchange module 3021 to absorb the heat emitted by the second module to be cooled 3021, such as the power exchange module, and dissipate the heat, and finally returns to the second water pump 3031 to be pumped out again. In one embodiment of the present invention, in order to improve the efficiency of heat exchange, a fan 3041 may also be provided at the heat exchanger 3011 to better and faster introduce normal temperature air into the heat exchanger to achieve heat exchange.

[0082] In one embodiment of the present invention, as shown in the figure, the second cooling module 003 can be provided with a multi-branch cooling source solution, that is, the second coolant circuit may include a plurality of second coolant branches, each second coolant branch being arranged in parallel, each second coolant branch being used to dissipate heat for a second module to be cooled 3021 to 302m, such as a power exchange module, and each first coolant branch includes a heat exchanger 3011 to 301m and a second water pump 3031 to 303m.

[0083] In order to calculate the system refrigeration demand and then control the working state of each device or module, and protect the system operation, in one embodiment of the present invention, a temperature sensor T and a pressure sensor P are also provided in the thermal management system. As shown in the figure, the temperature sensor T and the pressure sensor P can be provided at the exhaust port, and / or the air inlet, and / or the air supply inlet of the compressor, and / or the inlet, and / or the outlet of the evaporator, and / or the inlet, and / or the outlet of the condenser, and / or the inlet, and / or the outlet of the heat exchanger, etc.

[0084] In one embodiment of the present invention, the opening and closing of the compressor, and / or the opening degree of each throttling element, and / or the speed of the fan, and / or the opening degree of the water pump, and / or the opening degree of the bypass valve and the one-way valve, etc. can be controlled according to the temperature of the target equipment, and / or the pressure and temperature of the gas entering the compressor, and / or the pressure and temperature of the compressor exhaust gas, and / or the pressure and temperature of the first and second coolants, so as to ensure the quality of thermal management.

[0085] Based on the centralized energy storage thermal management system as described above, the present invention also provides an energy storage system, which, for example, includes multiple energy storage cabinets, each of which includes multiple modules to be cooled, such as each energy storage cabinet includes a group of battery cells and a power exchange module. The container energy storage system is provided with a centralized energy storage thermal management system as described above, wherein the number of first coolant branches is the same as the number of battery cells, the number of second coolant branches is the same as the number of power exchange modules, and the first coolant branches are used to dissipate heat for the battery cells in a one-to-one correspondence, and the second coolant branches are used to dissipate heat for the power exchange modules in a one-to-one correspondence.

[0086] By integrating the power exchange module with the heat source management system on both sides of the battery cell, combined with the ultra-small size of the compressor, the overall size of the liquid cooling unit can be greatly reduced. At the same time, the use of this multi-module approach can greatly reduce the space requirements for liquid cooling machines in each energy storage container in such a large-capacity energy storage power station, and centrally and efficiently control the entire energy storage power station.

[0087] Although various embodiments of the present invention are described above, it should be understood that they are presented as examples only and not as limitations. It is obvious to those skilled in the relevant art that various combinations, modifications and changes can be made thereto without departing from the spirit and scope of the present invention. Therefore, the breadth and scope of the present invention disclosed herein should not be limited by the exemplary embodiments disclosed above, but should only be defined according to the attached claims and their equivalents.

Claims

1. A centralized energy storage thermal management system, characterized in that: include: A refrigeration module, configured to provide circulation of a refrigerant, and comprising: a compressor configured to compress a refrigerant; a condenser, a first inlet of which is in communication with an exhaust port of the compressor; a first throttling element having an inlet connected to a first outlet of the condenser; and an evaporator, a first inlet of which is in communication with the outlet of the first throttling element, and a first outlet of the evaporator is connected to an air inlet of the compressor; A first cooling module, which is coupled to the refrigeration module through the evaporator, the first cooling module comprising a first coolant circuit, and the first coolant circuit is configured to dissipate heat for a first module to be cooled; and The second cooling module is coupled to the refrigeration module through the condenser, and the second cooling module includes a second coolant circuit, and the second coolant circuit is configured to dissipate heat for a second module to be cooled.

2. The centralized energy storage thermal management system according to claim 1, characterized in that: The compressor is an air-floating centrifugal refrigeration compressor, which comprises: An electric motor comprising: a housing having a first chamber and a second chamber respectively disposed at ends thereof; and A rotor having a first groove disposed thereon, wherein the rotor introduces gas into the first groove to form an air film when rotating, so as to form a grooved air-floating radial bearing; an impeller, arranged at an end of the rotor and located in the first chamber and / or the second chamber; an air inlet, which is in communication with the air inlet of the first chamber; an exhaust port communicating with the air outlet of the second chamber; and The connecting pipe has two ends connected to the air outlet of the first chamber and the air inlet of the second chamber respectively.

3. The centralized energy storage thermal management system according to claim 1, characterized in that: The first throttling element includes an electronic expansion valve.

4. The centralized energy storage thermal management system according to claim 1, characterized in that: The refrigeration module further includes a bypass valve, an inlet of the bypass valve is connected to the exhaust port of the compressor, and an outlet of the bypass valve is connected to the intake port of the compressor.

5. The centralized energy storage thermal management system according to claim 1, characterized in that: The refrigeration module also includes: an economizer, wherein a main inlet is connected to the outlet of the condenser, a main outlet is connected to the inlet of the first throttling element, and an auxiliary outlet is connected to the supplementary air inlet of the compressor; and The inlet of the second throttling element is connected to the main outlet of the economizer, and the outlet of the second throttling element is connected to the auxiliary inlet of the economizer.

6. The centralized energy storage thermal management system according to claim 1, characterized in that: The first cooling module comprises: A first water pump, whose outlet is connected to the second inlet of the evaporator, is configured to provide power for a first coolant, the first coolant flows through the evaporator in turn to exchange heat with the refrigerant, and the first module to be cooled dissipates heat before returning to the first water pump to form a first coolant circuit.

7. The centralized energy storage thermal management system according to claim 1, characterized in that: The first cooling module includes a plurality of first coolant branches, each of which is arranged in parallel, each of which is configured to dissipate heat for a first module to be cooled, and each of which includes a first water pump, the outlet of which is connected to the evaporator via a one-way valve.

8. The centralized energy storage thermal management system according to claim 1, characterized in that: The second cooling module comprises: a heat exchanger, the inlet of which is in communication with the second outlet of the condenser, and the outlet of which is connected to a second water pump; and A second water pump, whose outlet is connected to the second inlet of the condenser, is configured to provide power for a second coolant, and the second coolant flows through the condenser, the heat exchanger, and the second module to be cooled in sequence and then returns to the second water pump to form a second coolant loop.

9. The centralized energy storage thermal management system according to claim 8, characterized in that: It also includes a fan, which is arranged at the heat exchanger and is configured to introduce normal temperature air into the heat exchanger to achieve heat exchange.

10. The centralized energy storage thermal management system according to claim 1, characterized in that: The second cooling module includes a plurality of second coolant branches, each of which is arranged in parallel, each of which is configured to dissipate heat for a second module to be cooled, and each of which includes a heat exchanger and a second water pump.

11. The centralized energy storage thermal management system according to claim 1, characterized in that: The centralized energy storage thermal management system also includes at least one temperature sensor and at least one pressure sensor, and the temperature sensor and / or pressure sensor are arranged at the exhaust port, and / or the air inlet, and / or the air supply inlet, and / or the first and second coolant circuits of the compressor.

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