Double-channel refrigerating device for energy storage system

Abstract

The utility model relates to the technical field of energy storage systems, and discloses a dual-channel refrigerating device for an energy storage system, which can be respectively used for cooling a PCS and a battery pack, and comprises a shell, a first interface and a second interface which are respectively used for connecting the PCS and the battery pack and are arranged on the shell; the first cooling loop and the second cooling loop are arranged in the shell, the first connector is located on the first cooling loop, and the second connector is located on the second cooling loop; the water cooler is arranged in the shell, and the first cooling loop and the second cooling loop pass through the water cooler; when the PCS and the battery pack are connected to the first interface and the second interface respectively and the water cooler is started, the first cooling loop can cool the PCS, and the second cooling loop can cool the battery pack. The double-channel refrigerating device for the energy storage system can respectively cool the battery pack and the PCS, and is compact in structure, stable in performance and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of energy storage system, specifically relates to a double -channel refrigeration plant for energy storage system. BACKGROUND

[0002] With the rapid development of renewable energy, electrochemical energy storage systems (such as lithium ion battery energy storage systems) are increasingly widely used in power systems. In order to ensure the stable operation of these energy storage systems and prolong their service life, effective thermal management is crucial. Currently, the thermal management of electrochemical energy storage systems mainly uses air-cooled air conditioners or liquid cooling systems to cool the battery pack, while the PCS (power conversion system) mostly uses natural air cooling. This traditional cooling method is greatly affected by the environment and performs poorly in terms of waterproofing, dustproofing and temperature adaptability, which can easily lead to low PCS efficiency and thus affect the service life of the entire energy storage system. In addition, in order to achieve effective air cooling, a large space is usually required to arrange the air duct and waterproof louvers, which not only reduces the space utilization rate, but also easily affects the normal operation of the system due to dirt and blockage. SUMMARY

[0003] The utility model aims at the above problems existing in the prior art, and provides a double-channel refrigeration plant for energy storage system, which can cool the battery pack and PCS respectively, has compact structure, stable performance and long service life.

[0004] The utility model can be realized by the following technical scheme, a double-channel refrigeration plant for energy storage system, which can be used for cooling PCS and battery pack respectively, comprising:

[0005] A shell is provided with a first interface and a second interface for connecting the PCS and the battery pack respectively;

[0006] A first cooling circuit and a second cooling circuit are arranged in the shell, and the first interface is on the first cooling circuit, and the second interface is on the second cooling circuit;

[0007] A water cooler is arranged in the shell, and the first cooling circuit and the second cooling circuit pass through the water cooler;

[0008] When the PCS and the battery pack are connected to the first interface and the second interface respectively, and the water cooler is turned on, the first cooling circuit can cool the PCS, and the second cooling circuit can cool the battery pack.

[0009] Further, the water cooler is arranged on the first cooling circuit, and the second cooling circuit is connected to the first cooling circuit through a control valve; when the control valve is open, the second cooling circuit is in communication with the first cooling circuit, and when the control valve is closed, the second cooling circuit is separated from the first cooling circuit.

[0010] Further, a wind-cooled air conditioner assembly is arranged on the second cooling circuit, and when the wind-cooled air conditioner assembly is turned on, the second cooling circuit can cool the battery pack.

[0011] Further, the first interface comprises a first liquid supply port and a first liquid return port; the first cooling circuit comprises a first pipeline and a second pipeline, one end of the first pipeline is connected to the first liquid supply port, the other end is connected to the output end of the water cooler, one end of the second pipeline is connected to the first liquid return port, the other end is connected to the input end of the water cooler, and a first circulating water pump is arranged on the first pipeline.

[0012] Further, the second interface comprises a second liquid supply port and a second liquid return port; the control valve comprises an on-off electric ball valve and a three-way ball valve, the second cooling circuit comprises a third pipeline and a fourth pipeline, one end of the third pipeline is connected to the second liquid supply port, the other end is connected to the first pipeline through the on-off electric ball valve, one end of the fourth pipeline is connected to the second liquid return port, the other end is connected to the second pipeline through the three-way ball valve, and a second circulating water pump is arranged on the third pipeline.

[0013] Further, the three-way ball valve comprises a first joint, a second joint and a third joint, the first pipeline and the second pipeline are connected to the first joint and the second joint respectively, the second cooling circuit further comprises a fifth pipeline, one end of the fifth pipeline is connected to the third pipeline, the other end is connected to the third joint, and the wind-cooled air conditioner assembly is arranged on the fifth pipeline.

[0014] Further, the wind-cooled air conditioner assembly comprises a compressor, a condenser and a plate heat exchanger, the compressor and the condenser are connected in sequence and are connected to the plate heat exchanger respectively, and the plate heat exchanger is connected to the third joint and the third pipeline through the fifth pipeline respectively.

[0015] Further, the shell is detachably provided with a first fan and a second fan, the first fan is arranged opposite to the condenser, and the second fan is arranged opposite to the water cooler.

[0016] Further, the shell is further provided with a liquid injection interface, the liquid injection interface is connected to the first cooling circuit or the second cooling circuit through a sixth pipeline, and a seventh pipeline is further provided between the first cooling circuit and the second cooling circuit, and the seventh pipeline is provided with an adjusting electric ball valve.

[0017] Further, a liquid supplementing assembly provided in the shell is further included, the liquid supplementing assembly includes a liquid supplementing water tank and a liquid supplementing water pump, one end of the liquid supplementing water pump is connected to the liquid supplementing water tank, and the other end is connected to the first cooling circuit or the second cooling circuit.

[0018] Compared with the prior art, the utility model has the advantages that: by integrating the first cooling circuit, the second cooling circuit and the water cooler in one shell, and enabling a single water cooler to cool the PCS and the battery pack respectively, the influence of ambient temperature on the PCS or the battery pack during the cooling process is avoided, the utilization rate of the water cooler is effectively improved; at the same time, the structure of the refrigerating device is more compact, the demand for space is reduced, and the integration degree of the system is significantly improved. Compared with the traditional air cooling system, this integrated design not only saves installation space, but also simplifies the layout and maintenance of the system, reduces the installation and maintenance cost. In addition, the design of the first interface and the second interface enables the PCS and the battery pack to be conveniently and efficiently connected to the refrigerating device, ensures the quick installation and disassembly of the cooling system, and further improves the operation convenience and working efficiency of the system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of a dual-channel refrigerating device of an embodiment of the utility model.

[0020] Figure 2 It is an explosion view of a dual-channel refrigerating device of an embodiment of the utility model.

[0021] Figure 3 It is Figure 2 It is a structure schematic view from another perspective.

[0022] Figure 4 It is a schematic view of a first working mode of a dual-channel refrigerating device of an embodiment of the utility model.

[0023] Figure 5 It is a schematic view of a second working mode of a dual-channel refrigerating device of an embodiment of the utility model.

[0024] Figure 6 It is a schematic view of a third working mode of a dual-channel refrigerating device of an embodiment of the utility model.

[0025] In all the drawings, the same reference signs represent the same technical features, specifically: 100, housing; 101, accommodating cavity; 110, first interface; 111, first liquid supply port; 112, first liquid return port; 120, second interface; 121, second liquid supply port; 122, second liquid return port; 130, liquid injection interface; 200, water cooler; 300, control valve; 310, on-off electric ball valve; 320, three-way ball valve; 321, first joint; 322, second joint; 323, third joint; 330, regulating electric ball valve; 400, air-cooled air conditioning assembly; 410, compressor; 420, condenser; 430, plate heat exchanger; 500, first pipeline; 510, second pipeline; 520, first circulating water pump; 600, third pipeline; 610, fourth pipeline; 620, fifth pipeline; 630, second circulating water pump; 700, sixth pipeline; 710, seventh pipeline; 800, first fan; 810, second fan; 900, liquid supplement assembly; 910, liquid supplement tank; 920, liquid supplement pump. DETAILED DESCRIPTION

[0026] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0028] As shown in FIG. 1, a dual-channel refrigeration device for an energy storage system, which can be used to cool a PCS and a battery pack respectively, comprises: Figures 1 to 6

[0029] a housing 100, on which a first interface 110 and a second interface 120 are arranged, which can be connected to the PCS and the battery pack respectively;

[0030] a first cooling circuit and a second cooling circuit, which are arranged in the housing 100, and the first interface 110 is on the first cooling circuit and the second interface 120 is on the second cooling circuit;

[0031] a water cooler 200, which is arranged in the housing 100, and the first cooling circuit and the second cooling circuit both pass through the water cooler 200;

[0032] ​When the PCS and the battery pack are connected to the first interface 110 and the second interface 120 respectively, and the water cooler 200 is turned on, the first cooling circuit can cool the PCS, and the second cooling circuit can cool the battery pack. This design enables a single water cooler 200 to cool the PCS and the battery pack respectively, avoiding the influence of the ambient temperature on the PCS or the battery pack during the cooling process, and effectively improving the utilization rate of the water cooler 200; at the same time, it also makes the structure of the refrigeration device more compact, reduces the demand for space, and significantly improves the integration of the system. Moreover, it also enables the PCS and the battery pack to be conveniently and efficiently connected to the refrigeration device, ensuring the quick installation and disassembly of the cooling system, and further improving the operation convenience and working efficiency of the system.

[0033] Specifically, as shown in the figure, Figures 1 to 3 In this embodiment, the shell 100 is rectangular, has a receiving cavity 101 for accommodating the refrigeration system, and can protect the refrigeration system.

[0034] In this embodiment, the shell 100 is provided with a first interface 110 and a second interface 120 for connecting the PCS and the battery pack respectively, the first interface 110 and the second interface 120 are arranged adjacent to each other, and the first interface 110 is on the first cooling circuit and the second interface 120 is on the second cooling circuit. This design enables the refrigeration device to be efficiently and conveniently connected to the PCS and the battery pack, effectively improving the convenience of disassembly, maintenance.

[0035] In this embodiment, the first interface 110 includes a first liquid inlet 111 and a first liquid return port 112, and the second interface 120 includes a second liquid inlet 121 and a second liquid return port 122; wherein the first liquid inlet 111 serves as an interface for delivering cooling liquid to the PCS, the first liquid return port 112 serves as an interface for receiving cooling liquid returned after passing through the PCS, so as to form a circulating loop for the first cooling circuit, the second liquid inlet 121 serves as an interface for delivering cooling liquid to the battery pack, and the second liquid return port 122 serves as an interface for receiving cooling liquid returned after passing through the battery pack, so as to form a circulating loop for the second cooling circuit. This design effectively improves the reuse rate of the cooling liquid and reduces the use cost.

[0036] To reduce the influence of the external environment on the cooling effect of the PCS and the battery pack, in this embodiment, a liquid cooling mode is adopted to cool the PCS and the battery pack. Specifically, a water cooler 200 is arranged in the shell 100, and the first cooling circuit and the second cooling circuit both pass through the water cooler 200. This design enables the first cooling circuit and the second cooling circuit to cool the PCS and the battery pack respectively, and also enables them to share the same water cooler 200, which not only reduces the influence of the external environment and ensures the cooling effect of the PCS and the battery pack, but also improves the utilization rate of the water cooler 200 and makes the overall structure more compact.

[0037] Since in some cases, the heat dissipation requirement of the battery pack is lower than that of the PCS, i.e., the PCS and the battery pack have different cooling requirements in different working conditions, in the embodiment, the water cooler 200 is arranged on the first cooling circuit, and the second cooling circuit is connected to the first cooling circuit through the control valve 300; when the control valve 300 is turned on, the second cooling circuit is in communication with the first cooling circuit, so that the cooling liquid in the second cooling circuit can flow into the first cooling circuit and mix with the cooling liquid in the second cooling circuit to flow to the water cooler 200, and then flow to the corresponding liquid supply ports under the action of the control valve 300, realizing the synchronous cooling of the two; when the control valve 300 is closed, the second cooling circuit is separated from the first cooling circuit, at this time, only the cooling liquid in the first cooling circuit can pass through the water cooler 200 to cool the PCS, and the cooling liquid in the second cooling circuit does not pass through the water cooler 200, so that the battery pack is not cooled, or the battery pack is cooled by the air-cooled air conditioning assembly 400. Through the on and off of the control valve 300, the second cooling circuit can be flexibly connected or separated from the first cooling circuit, the system can dynamically adjust the cooling path according to different working conditions, and it is ensured that the PCS and the battery pack can work at the best temperature.

[0038] In the embodiment, the air-cooled air conditioning assembly 400 is also arranged on the second cooling circuit, and the second cooling circuit can cool the battery pack when the air-cooled air conditioning assembly 400 is turned on. This design enables the second cooling circuit to provide additional cooling support on the basis of liquid cooling when the control valve 300 is turned on, ensures that the battery pack can also maintain a suitable working temperature under high load or rapid charging and discharging conditions, avoids the occurrence of overheating, and effectively prolongs the service life of the battery; when the control valve 300 is closed, two independent cooling circuits can be formed with the first cooling circuit, realizing differentiated cooling function and effectively improving the cooling effect of the PCS and the battery pack.

[0039] In the embodiment, the first cooling circuit includes a first pipe 500 and a second pipe 510, one end of the first pipe 500 is connected with the first liquid supply port 111, the other end is connected with the output end of the water cooler 200, one end of the second pipe 510 is connected with the first liquid return port 112, the other end is connected with the input end of the water cooler 200, and a first circulating water pump is arranged on the first pipe 500. Preferably, the first pipe 500 and the second pipe 510 are formed by a plurality of sub-pipes with different lengths. This design not only improves the utilization rate of the internal space of the shell 100, but also ensures that the cooling liquid has sufficient flow rate in the first cooling circuit, overcomes the pipe resistance, improves the circulation efficiency of the cooling liquid, and ensures that the PCS can be fully cooled.

[0040] In the embodiment, the second cooling circuit comprises a third pipeline 600 and a fourth pipeline 610, one end of the third pipeline 600 is connected with the second liquid supply port 121, the other end is connected with the first pipeline 500 through the on-off electric ball valve 310, one end of the fourth pipeline 610 is connected with the second liquid return port 122, the other end is connected with the second pipeline 510 through the three-way ball valve 320, and the second circulating water pump is arranged on the third pipeline 600. Preferably, the third pipeline 600 and the fourth pipeline 610 are formed by a plurality of sub-pipelines with different lengths. The design not only improves the utilization rate of the internal space of the shell 100, but also ensures that the cooling liquid has sufficient flow rate in the second cooling circuit, overcomes the pipeline resistance, improves the circulation efficiency of the cooling liquid, and ensures that the battery pack can be fully cooled.

[0041] As Figures 1 to 6 In the embodiment, the control valve 300 comprises the on-off electric ball valve 310 and the three-way ball valve 320, wherein the on-off electric ball valve 310 is arranged between the first pipeline 500 and the third pipeline 600, and the on-off electric ball valve 310 realizes the connection and separation of the second cooling circuit and the first cooling circuit by using the on-off function and cooperating with the three-way ball valve 320. The three-way ball valve 320 is arranged between the second pipeline 510 and the fourth pipeline 610, and the three-way ball valve 320 not only realizes the connection of the second pipeline 510 and the fourth pipeline 610, but also provides a connection joint for the air-cooled air conditioning assembly 400, thereby ensuring the smoothness of the connection of the first cooling circuit and the second cooling circuit.

[0042] In the embodiment, the three-way ball valve 320 comprises a first joint 321, a second joint 322 and a third joint 323, the first pipeline 500 and the second pipeline 510 are connected with the first joint 321 and the second joint 322 respectively, the second cooling circuit further comprises a fifth pipeline 620, one end of the first pipeline 500 is connected with the third pipeline 600, the other end is connected with the third joint 323, and the air-cooled air conditioning assembly 400 is arranged on the fifth pipeline 620. The design makes the layout of the system pipeline more clear, reduces unnecessary pipeline connection, and enables the three-way ball valve 320 to realize the connection and separation of the second cooling circuit and the first cooling circuit, the connection of the second cooling circuit and the air-cooled air conditioning assembly 400, and the independent operation of the second cooling circuit by controlling the on-off of the first joint 321, the second joint 322 and the third joint 323 and cooperating with the on-off electric ball valve 310.

[0043] It is worth noting that the three-way ball valve 320 can also control the flow of the cooling liquid in the first pipeline 500 by controlling the first joint 321, thereby ensuring the cooling effect of the PCS.

[0044] In the embodiment, the air conditioning assembly includes a compressor 410, a condenser 420, and a plate heat exchanger 430, the compressor 410 and the condenser 420 are sequentially connected and connected to the plate heat exchanger 430 respectively, and the plate heat exchanger 430 is connected to the second joint 322 and the third pipeline 600 respectively through the fifth pipeline 620. The design enables the air-cooled air conditioning assembly 400 to provide effective cooling support for the second cooling circuit, especially in high load or rapid charging and discharging conditions, to ensure that the battery pack can maintain an appropriate working temperature and avoid overheating. In addition, the modular design of the air-cooled air conditioning assembly 400 makes the installation and maintenance of the device more convenient, reduces the difficulty of troubleshooting, and improves the overall performance of the device.

[0045] In the embodiment, the housing 100 is detachably provided with a first fan 800 and a second fan 810, wherein the first fan 800 is arranged opposite to the condenser 420, and the second fan 810 is arranged opposite to the water cooler 200. The design provides uniform cold air flow for the condenser 420 and the water cooler 200, removes the heat of the condenser 420 and the water cooler 200, avoids local overheating of the condenser 420 and the water cooler 200, effectively improves the heat dissipation uniformity of the device, and extends the service life of the device.

[0046] In the embodiment, the housing 100 is further provided with a liquid injection port 130 located between the second liquid inlet 121 and the first liquid return port 112, connected to the first cooling circuit or the second cooling circuit through the sixth pipeline 700, preferably connected to the third pipeline 600 through the sixth pipeline 700, and the first cooling circuit and the second cooling circuit are further provided with a seventh pipeline 710, and the seventh pipeline 710 is provided with an adjustable electric ball valve 330. The design provides a connection port for the initial liquid injection of the refrigeration device, and through the cooperation of the sixth pipeline 700 and the seventh pipeline 710, the cooling liquid can flow into the first cooling circuit and the second cooling circuit, and through the design of the adjustable electric ball valve 330, the user can flexibly adjust the flow of the cooling liquid according to the actual demand, ensure the reasonable distribution of the cooling liquid between the two circuits, avoid the waste of cooling resources, and improve the cooling efficiency of the device.

[0047] Due to long-term operation, the cooling liquid may be reduced due to evaporation, leakage and other reasons, affecting the cooling effect of the device. In this embodiment, a liquid supplementing assembly 900 is also arranged in the shell 100, which includes a liquid supplementing tank 910 and a liquid supplementing pump 910. One end of the liquid supplementing pump 910 is connected to the liquid supplementing tank 910, and the other end is connected to the first cooling circuit or the second cooling circuit. Preferably, the other end of the liquid supplementing pump 910 is connected to the third pipeline 600 of the second cooling circuit. In this design, the liquid supplementing pump 920 can automatically deliver cooling liquid from the liquid supplementing tank 910 to the first cooling circuit or the second cooling circuit according to actual needs, forming an automatic liquid supplementing mechanism. This design ensures the timely supplementing of cooling liquid, avoids system overheating or damage caused by insufficient cooling liquid, and improves the reliability of the system. Precise control of the liquid supplementing pump 920 ensures that the supplementing amount of cooling liquid is moderate, avoiding excessive supplementing or deficiency, and ensuring the cooling effect of the system. The modular design of the liquid supplementing assembly 900 makes the installation and maintenance of the system more convenient, reduces the difficulty of troubleshooting, and improves the overall performance of the system.

[0048] Preferably, in this embodiment, the bottom of the shell 100 is also provided with a ventilation plate, and a plurality of through holes are arranged in a matrix on the ventilation plate. This design enables the refrigeration device to also have a natural ventilation function, further improving the safety of the refrigeration device in use.

[0049] In this embodiment, Figures 1 to 3 For the actual schematic diagram, the schematic diagram of part of the structure such as the control valve 300 is omitted, and the connection relationship of the structure such as the control valve 300 is shown Figures 4 to 6 .

[0050] In this embodiment, through the cooperation of the first cooling circuit, the second cooling circuit, the water cooler 200, the air-cooled air conditioner assembly 400 and the control valve 300, the dual-channel refrigeration device of the present application can form three working modes of full-free cooling running mode, independent cooling mode and mixed water running mode.

[0051] As Figure 4 shown, in the full-free cooling running mode: the first joint 321 and the second joint 322 of the three-way ball valve 320 are in a conductive state, the third joint 323 is in a disconnected state, the on-off electric ball valve 310 is in a conductive state, and the adjusting electric ball valve 330 is in a disconnected state; at this time, the cooling liquid flows to the water cooler 200 along the second pipeline 510 and the third pipeline 600, and then flows to the first pipeline 500 from the water cooler 200, and is divided into two parts when passing through the on-off electric ball valve 310, one part flows to the first circulating water pump 520, and the other part flows to the second circulating water pump 630, so that the first cooling circuit and the second cooling circuit respectively cool the PCS and the battery pack in the form of liquid cooling.

[0052] As Figure 5As shown, in the independent cooling mode: the first joint 321 and the third joint 323 of the three-way ball valve 320 are in the on state, the second joint 322 is in the off state, the on-off electric ball valve 310 is in the off state, and the adjusting electric ball valve 330 is in the off state; at this time, one way of the cooling liquid flows to the water cooler 200 along the second pipeline 510, then flows to the first pipeline 500 from the water cooler 200, and flows to the first liquid inlet 111 through the first circulating water pump 520; another way of the cooling liquid flows to the air-cooled air conditioning assembly 400 along the fourth pipeline 610, then flows to the third pipeline 600 from the air-cooled air conditioning assembly 400, and flows to the second liquid inlet 121 through the second circulating water pump 630, so that the first cooling loop cools the PCS in the form of liquid cooling, and the second cooling loop cools the battery pack in the form of air-cooled air conditioning, realizing independent cooling.

[0053] As shown in FIG. 6, the PCS cooling system 100 includes a first cooling loop and a second cooling loop. Figure 6 As shown, in the mixed water operation mode: the first joint 321 and the third joint 323 of the three-way ball valve 320 are in the on state, the second joint 322 is in the off state, the on-off electric ball valve 310 is in the on state, and the adjusting electric ball valve 330 is in the on state; at this time, one way of the cooling liquid flows to the water cooler 200 along the second pipeline 510, then flows to the first pipeline 500 from the water cooler 200, and is divided into two parts when passing through the on-off electric ball valve 310, one part flows to the first circulating water pump 520, and the other part flows to the second circulating water pump 630; another way of the cooling liquid flows to the air-cooled air conditioning assembly 400 along the fourth pipeline 610, then flows to the third pipeline 600 from the air-cooled air conditioning assembly 400, and is intelligently divided when passing through the adjusting electric ball valve 330, so that the first cooling loop cools the PCS in the form of liquid cooling, and the second cooling loop cools the battery pack in the form of mixed liquid cooling and air-cooled air conditioning.

[0054] It is worth noting that Figures 4 to 6 the arrow in the above figure points to the flow direction of the cooling liquid.

[0055] It should be noted that in the present application, the description of "first", "second", "one" and the like are only used for the purpose of description and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited. The terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.

[0057] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A dual channel refrigeration unit for an energy storage system, separately usable for cooling a PCS and a battery pack, characterized in that, The application relates to a cooling system for a power battery pack and a power control system (PCS), which comprises the following parts: a shell, which is provided with a first interface and a second interface for connecting the PCS and the battery pack respectively; a first cooling circuit and a second cooling circuit, which are arranged in the shell, and the first interface is arranged on the first cooling circuit and the second interface is arranged on the second cooling circuit; a water cooler, which is arranged in the shell and through which the first cooling circuit and the second cooling circuit pass; when the PCS and the battery pack are connected to the first interface and the second interface respectively and the water cooler is turned on, the first cooling circuit can cool the PCS and the second cooling circuit can cool the battery pack.

2. A dual pass refrigeration unit for an energy storage system as claimed in claim 1, wherein, The water cooler is arranged on the first cooling circuit and the second cooling circuit is connected to the first cooling circuit through a control valve; when the control valve is turned on, the second cooling circuit is communicated with the first cooling circuit; when the control valve is turned off, the second cooling circuit is separated from the first cooling circuit.

3. A dual pass refrigeration unit for an energy storage system as claimed in claim 2, wherein, The application further relates to a wind-cooled air conditioner assembly, which is arranged on the second cooling circuit and can cool the battery pack when the wind-cooled air conditioner assembly is turned on.

4. A dual pass refrigeration unit for an energy storage system as claimed in claim 3, wherein, The first interface comprises a first liquid inlet and a first liquid return; the first cooling circuit comprises a first pipeline and a second pipeline, one end of the first pipeline is connected to the first liquid inlet, the other end is connected to the output end of the water cooler, one end of the second pipeline is connected to the first liquid return, the other end is connected to the input end of the water cooler, and a first circulating water pump is arranged on the first pipeline.

5. A dual pass refrigeration unit for an energy storage system as claimed in claim 4, wherein, The second interface comprises a second liquid inlet and a second liquid return; the control valve comprises an on-off electric ball valve and a three-way ball valve; the second cooling circuit comprises a third pipeline and a fourth pipeline, one end of the third pipeline is connected to the second liquid inlet, the other end is connected to the first pipeline through the on-off electric ball valve, one end of the fourth pipeline is connected to the second liquid return, the other end is connected to the second pipeline through the three-way ball valve, and a second circulating water pump is arranged on the third pipeline.

6. A dual pass refrigeration unit for an energy storage system as claimed in claim 5, wherein, The three-way ball valve comprises a first joint, a second joint and a third joint, the first pipeline and the second pipeline are connected to the first joint and the second joint respectively, the second cooling circuit further comprises a fifth pipeline, one end of the fifth pipeline is connected to the third pipeline, the other end is connected to the third joint, and the wind-cooled air conditioner assembly is arranged on the fifth pipeline.

7. A dual pass refrigeration unit for an energy storage system as claimed in claim 6, wherein, The wind-cooled air conditioner assembly comprises a compressor, a condenser and a plate heat exchanger, the compressor and the condenser are sequentially connected and are connected to the plate heat exchanger respectively, and the plate heat exchanger is connected to the third joint and the third pipeline through the fifth pipeline.

8. A dual pass refrigeration unit for an energy storage system as claimed in claim 7, wherein, The shell is detachably provided with a first fan and a second fan, the first fan is arranged opposite to the condenser, and the second fan is arranged opposite to the water cooler.

9. A dual pass refrigeration unit for an energy storage system as claimed in claim 1, wherein, The shell is further provided with a liquid injection interface connected to the first cooling circuit or the second cooling circuit through a sixth pipeline, and a seventh pipeline is further arranged between the first cooling circuit and the second cooling circuit, and an electric ball valve is arranged on the seventh pipeline.

10. A dual pass refrigeration unit for an energy storage system as claimed in claim 1, wherein, A liquid supplement assembly is further arranged in the shell, and the liquid supplement assembly comprises a liquid supplement tank and a liquid supplement pump, one end of the liquid supplement pump is connected to the liquid supplement tank, and the other end is connected to the first cooling circuit or the second cooling circuit.

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