Cooling system and energy storage prefabricated cabin

Abstract

The utility model relates to the field of prefabricated cabins, and provides a cooling system and an energy storage prefabricated cabin. The cooling system comprises an internal heat exchange assembly and an external heat exchange assembly. Wherein the internal heat exchange assembly is arranged in the energy storage prefabricated cabin and connected with the battery cluster, and the external heat exchange assembly is arranged outside the energy storage prefabricated cabin and connected with the internal heat exchange assembly through a connector; the internal heat exchange assembly is used for exchanging heat with the battery cluster and transmitting the heat to the external heat exchange assembly, and the external heat exchange assembly is used for dissipating the heat. The internal heat exchange assembly of the cooling system is arranged in the energy storage prefabricated cabin, and the external heat exchange assembly is arranged outside the energy storage prefabricated cabin, so that the number of the assemblies, arranged in the energy storage prefabricated cabin, of the cooling system is reduced, the installation space occupied by the cooling system can be reduced, the number of battery clusters capable of being installed in the energy storage prefabricated cabin is increased, and the installation efficiency is improved. And the energy density of the energy storage prefabricated cabin is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated warehouses, and in particular to a cooling system and an energy storage prefabricated cabin. Background Art

[0002] With the continuous growth of energy demand and the rapid development of renewable energy, energy storage technology has become an indispensable part of the power system. As a highly integrated and fast-deployed solution, prefabricated energy storage cabins are widely used in power grid regulation, emergency power supply, microgrid systems and other fields. A large number of battery clusters are usually installed inside the prefabricated cabin. These battery clusters generate a lot of heat during the charging and discharging process. If the heat is not dissipated in time, the performance and life of the battery cluster will be seriously affected.

[0003] In the design of traditional energy storage prefabricated cabin cooling systems, liquid cooling is usually used to dissipate heat from the battery. The cooling system transfers heat to an external radiator through circulating cooling liquid for release. The cooling system's heat dissipation channels, fans or pumps and other equipment, as well as the corresponding pipeline layout, need to occupy the installation space inside the prefabricated cabin, thereby limiting the number of battery clusters that can be installed and affecting the energy storage density of the prefabricated cabin.

[0004] Therefore, how to reduce the space occupied by the cooling system in the prefabricated cabin while facilitating installation is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The utility model provides a cooling system and an energy storage prefabricated cabin, which are used to solve the defect in the prior art that the cooling system occupies a large space inside the prefabricated cabin.

[0006] On the one hand, the utility model provides a cooling system for a prefabricated energy storage cabin with a battery cluster inside, the cooling system comprising an internal heat exchange component and an external heat exchange component;

[0007] The internal heat exchange component is arranged inside the energy storage prefabricated cabin, and the internal heat exchange component is connected to the battery cluster, and the external heat exchange component is arranged outside the energy storage prefabricated cabin, and the external heat exchange component is detachably connected to the internal heat exchange component through a joint;

[0008] The internal heat exchange component is used to exchange heat with the battery cluster and transfer the heat to the external heat exchange component, and the external heat exchange component is used to dissipate the heat.

[0009] According to a cooling system provided by the utility model, the internal heat exchange component includes a circulation pump, and the circulation pump is used to drive the coolant to circulate between the internal heat exchange component and the battery cluster.

[0010] According to a cooling system provided by the utility model, the internal heat exchange component further includes a first heat exchanger, and the circulation pump, the first heat exchanger and the battery cluster are connected to form a first loop;

[0011] The external heat exchange component includes a compressor, a condenser and an expansion element. The outlet of the compressor is connected to the condenser, the expansion element is connected to the outlet of the condenser, and the inlet of the compressor and the outlet of the expansion element are both connected to the first heat exchanger through corresponding joints.

[0012] According to a cooling system provided by the utility model, the external heat exchange component further includes a switch valve, and the switch valve is provided between the inlet of the compressor and the corresponding joint and between the outlet of the expansion element and the corresponding joint.

[0013] According to a cooling system provided by the utility model, the external heat exchange component includes a second heat exchanger, and the second heat exchanger is respectively connected to the circulation pump and the battery cluster through a joint to form a second loop.

[0014] According to a cooling system provided by the utility model, the external heat exchange component also includes a one-way valve, and the one-way valve is provided between the inlet of the second heat exchanger and the corresponding joint and between the outlet of the second heat exchanger and the corresponding joint.

[0015] According to a cooling system provided by the utility model, the internal heat exchange component further includes a heating device, and the heating device is arranged at the outlet or inlet of the circulation pump;

[0016] And / or, the internal heat exchange component further includes an expansion tank, and the expansion tank is connected to the inlet or outlet of the circulation pump.

[0017] According to a cooling system provided by the utility model, the external heat exchange component is respectively connected to the internal heat exchange components of at least two of the energy storage prefabricated cabins.

[0018] On the other hand, the utility model also provides a prefabricated energy storage cabin, comprising a battery cluster and the cooling system as described above.

[0019] According to a prefabricated energy storage cabin provided by the utility model, a fire-fighting module is provided inside the prefabricated energy storage cabin, and the internal heat exchange component is arranged at the bottom or top of the fire-fighting module.

[0020] The cooling system provided by the utility model is characterized in that an internal heat exchange component is arranged inside the energy storage prefabricated cabin and connected to the battery cluster, and an external heat exchange component is arranged outside the energy storage prefabricated cabin and connected to the internal heat exchange component through a joint. The internal heat exchange component is used to exchange heat with the battery cluster, thereby cooling the battery cluster, and can transfer heat to the external heat exchange component, which is dissipated by the external heat exchange component to the outside of the energy storage prefabricated cabin.

[0021] In this arrangement, the internal heat exchange components of the cooling system are arranged inside the prefabricated energy storage cabin, and the external heat exchange components are arranged outside the prefabricated energy storage cabin, thereby reducing the number of components of the cooling system arranged in the prefabricated energy storage cabin, thereby reducing the installation space occupied by the cooling system, increasing the number of battery clusters that can be installed in the prefabricated energy storage cabin, and thus improving the energy density of the prefabricated energy storage cabin.

[0022] In addition, the internal heat exchange component and the external heat exchange component are connected by a joint, so the internal heat exchange component and the external heat exchange component can be installed or debugged as two separate independent units, and the external heat exchange component and the internal heat exchange component can be connected on site, thereby improving the convenience of installation and debugging of the cooling system.

[0023] The energy storage prefabricated cabin provided by the utility model includes the cooling system provided by the utility model, and thus includes all the above-mentioned advantages of the cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0025] Figure 1 It is a schematic diagram of the structure of the cooling system provided by the embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of a prefabricated energy storage cabin provided in an embodiment of the utility model.

[0027] Reference numerals:

[0028] 1. Cooling system; 101. Internal heat exchange component; 101a. Circulation pump; 101b. First heat exchanger; 101c. Heating device; 101d. Expansion tank; 102. External heat exchange component; 102a. Compressor; 102b. Condenser; 102c. Expansion element; 102d. Switch valve; 102e. Second heat exchanger; 102f. One-way valve; 102g. Fan; 102h. Gas-liquid separator; 102i. Filter; 103. Connector; 2. Energy storage prefabricated cabin; 201. Battery cluster. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Combine the following Figure 1-Figure 2 A cooling system 1 provided in an embodiment of the present invention is described.

[0031] Specifically, the cooling system 1 is used in the energy storage prefabricated cabin 2, and a battery cluster 201 is arranged in the energy storage prefabricated cabin 2. The cooling system 1 includes an internal heat exchange component 101 and an external heat exchange component 102.

[0032] The internal heat exchange component 101 is disposed inside the energy storage prefabricated cabin 2, and the internal heat exchange component 101 is connected to the battery cluster 201, for example, the internal heat exchange component 101 is connected to the battery cluster 201 through a pipeline, so that the cooling medium can flow between the internal heat exchange component 101 and the battery cluster 201. The external heat exchange component 102 is disposed outside the energy storage prefabricated cabin 2, and the external heat exchange component 102 is detachably connected to the internal heat exchange component 101 through a joint 103, for example, the joint 103 can be a quick-change joint or a threaded joint.

[0033] The internal heat exchange component 101 is used to exchange heat with the battery cluster 201 and transfer the heat to the external heat exchange component 102. The external heat exchange component 102 is used to dissipate heat. For example, the external heat exchange component 102 can exchange heat with the external environment of the energy storage prefabricated cabin 2, thereby dissipating heat to the external environment. Alternatively, the external heat exchange component 102 can also exchange heat with other low-temperature media, which include but are not limited to water, so that the external heat exchange component 102 can be used to heat the water.

[0034] In this way, in the embodiment of the utility model, the internal heat exchange component 101 of the cooling system 1 is arranged inside the prefabricated energy storage cabin 2, and the external heat exchange component 102 is arranged outside the prefabricated energy storage cabin 2, thereby reducing the number of components of the cooling system 1 arranged in the prefabricated energy storage cabin 2, thereby reducing the installation space occupied by the cooling system 1, and increasing the number of battery clusters 201 that can be installed in the prefabricated energy storage cabin 2, thereby improving the energy density of the prefabricated energy storage cabin 2.

[0035] In addition, the internal heat exchange component 101 and the external heat exchange component 102 are detachably connected via the joint 103, so the internal heat exchange component 101 and the external heat exchange component 102 can be installed or debugged as two separate independent units, and the external heat exchange component 102 and the internal heat exchange component 101 can be connected via a plug on site, thereby improving the convenience of installation and debugging of the cooling system 1.

[0036] In some embodiments provided by the present invention, the internal heat exchange component 101 includes a circulation pump 101a. The circulation pump 101a is used to drive the coolant to circulate between the internal heat exchange component 101 and the battery cluster 201. In this embodiment, the circulation pump 101a can speed up the flow of the coolant between the internal heat exchange component 101 and the battery cluster 201, thereby providing a better cooling effect for the battery cluster 201.

[0037] refer to Figure 1 As shown, in some embodiments provided by the present invention, the internal heat exchange component 101 further includes a first heat exchanger 101b. The circulation pump 101a, the first heat exchanger 101b and the battery cluster 201 are connected to form a first loop. For example, the inlet of the circulation pump 101a is connected to the battery cluster 201, and the outlet of the circulation pump 101a is connected to the battery cluster 201 through the first heat exchanger 101b.

[0038] The external heat exchange component 102 includes a compressor 102a, a condenser 102b and an expansion element 102c. The outlet of the compressor 102a is connected to the condenser 102b. The expansion element 102c is connected to the outlet of the condenser 102b, and the expansion element 102c can be an expansion valve or a throttle valve. The inlet of the compressor 102a and the outlet of the expansion element 102c are both connected to the first heat exchanger 101b through corresponding joints 103. Optionally, the first heat exchanger 101b has a first flow channel and a second flow channel capable of heat exchange, wherein the first flow channel connects the circulation pump 101a and the battery cluster 201, the outlet of the expansion element 102c is connected to the inlet of the second flow channel through the corresponding joint 103, and the inlet of the compressor 102a is connected to the outlet of the second flow channel through the corresponding joint 103.

[0039] In this embodiment, under the action of the circulation pump 101a, the coolant in the battery cluster 201 that absorbs heat and heats up enters the first heat exchanger 101b, exchanges heat with the refrigerant in the first heat exchanger 101b and cools down, and finally returns to the battery cluster 201. The refrigerant in the first heat exchanger 101b is compressed by the compressor 102a and enters the condenser 102b to condense and absorb heat, and then returns to the first heat exchanger 101b to exchange heat with the coolant after throttling expansion through the expansion element 102c.

[0040] With such configuration, on the one hand, the cooling system 1 only needs to consume a small amount of electric energy to drive the compressor 102 a to work, transferring the external cold to the coolant, so that the temperature of the coolant can be lower than the ambient temperature, thereby providing a better cooling effect for the battery cluster 201 .

[0041] On the other hand, the first circuit is arranged inside the energy storage prefabricated cabin 2. After being connected to the battery cluster 201, it can be coordinated with the energy storage prefabricated cabin 2 and filled with coolant, while the circulating pump 101a, condenser 102b and expansion element 102c of the external heat exchange component 102 can be separately filled with refrigerant and debugged in conjunction with the external evaporator, so that the external heat exchange component 102 and the internal heat exchange component 101 can be debugged separately and can be debugged before leaving the factory, thereby reducing the workload required for on-site debugging.

[0042] Finally, the compressor 102a, the condenser 102b and the expansion element 102c are all arranged outside the energy storage prefabricated cabin 2, which can improve the cooling effect of the battery cluster 201 while reducing the occupation of the installation space of the energy storage prefabricated cabin 2.

[0043] In some embodiments provided by the present utility model, the external heat exchange component 102 further includes a switch valve 102d. A switch valve 102d is provided between the inlet of the compressor 102a and the corresponding joint 103 and between the outlet of the expansion element 102c and the corresponding joint 103. Optionally, the switch valve 102d can be a stop valve, a ball valve or a needle valve.

[0044] In this embodiment, by setting corresponding switch valves 102d at the inlet of the compressor 102a and the outlet of the expansion element 102c, the switch valves 102d at the two locations can be closed after the refrigerant is injected, thereby preventing the refrigerant from leaking. With such a setting, the switch valves 102d at the two locations can be closed after the debugging is completed, or the refrigerant can be injected into the external heat exchange component 102 and the switch valves 102d at the two locations can be closed before leaving the factory, so that there is no need to add refrigerant during on-site installation, thereby reducing the workload during on-site installation and improving the convenience of on-site installation. In addition, with such a setting, the circulation loop of the refrigerant is located in the external heat exchange component 102, and the circulation loop of the coolant is located in the internal heat exchange component 101, so that it is convenient to debug the circulation loop where the refrigerant is located and the circulation loop where the coolant is located separately.

[0045] In some embodiments provided by the present invention, the external heat exchange assembly 102 further includes at least one of a gas-liquid separator 102h and a filter 102i, wherein the gas-liquid separator 102h is disposed at the inlet of the compressor 102a, and the filter 102i is disposed between the expansion element 102c and the condenser 102b.

[0046] By providing a gas-liquid separator 102h, the liquid refrigerant in the refrigerant can be separated, so as to avoid the problem that the refrigerant is not fully evaporated in the first heat exchanger 101b, and part of the refrigerant enters the compressor 102a in liquid form, causing mechanical impact damage inside the compressor 102a. By providing a filter 102i, impurities in the refrigerant can be filtered to avoid impurities damaging the compressor 102a or the expansion element 102c.

[0047] In some embodiments provided by the present invention, the external heat exchange component 102 includes a second heat exchanger 102e. The second heat exchanger 102e is respectively connected to the circulation pump 101a and the battery cluster 201 through the joint 103 to form a second loop. Optionally, the inlet of the circulation pump 101a is connected to the battery cluster 201, and the outlet of the circulation pump 101a is connected to the battery cluster 201 through the second heat exchanger 102e.

[0048] In this embodiment, under the action of the circulation pump 101 a , the coolant in the battery cluster 201 that absorbs heat and heats up enters the second heat exchanger 102 e , is cooled in the second heat exchanger 102 e , and finally returns to the battery cluster 201 .

[0049] With such configuration, when the external environment is low or the heat generated by the battery cluster 201 is low, air cooling can be used to cool the coolant through the second heat exchanger 102 e , thereby reducing the energy consumption of the cooling system 1 .

[0050] In some embodiments provided by the present utility model, the internal heat exchange component 101 further includes a three-way valve. The first heat exchanger 101b and the second heat exchanger 102e are both connected to the outlet of the circulation pump 101a through the three-way valve, wherein the second heat exchanger 102e is connected to the three-way valve through a corresponding joint 103. Such an arrangement facilitates the first heat exchanger 101b and the second heat exchanger 102e to be connected to the circulation pump 101a.

[0051] In some embodiments provided by the present invention, the external heat exchange component 102 further includes a one-way valve 102f. A one-way valve 102f is provided between the inlet of the second heat exchanger 102e and the corresponding joint 103 and between the outlet of the second heat exchanger 102e and the corresponding joint 103. Figure 1 As shown, by setting a one-way valve 102f, after the circulating pump 101a drives the coolant to enter the first heat exchanger 101b, the coolant discharged from the first heat exchanger 101b can be prevented from entering the second heat exchanger 102e, thereby ensuring the stability of the operation of the cooling system 1.

[0052] In some embodiments provided by the present invention, the external heat exchange component 102 further includes a fan 102g, and the condenser 102b and the second heat exchanger 102e are both arranged on the driving airflow path of the fan 102g, so that the fan 102g can cool down the condenser 102b and the second heat exchanger 102e, thereby accelerating the heat exchange speed between the condenser 102b and the environment and between the second heat exchanger 102e and the environment. Further, on the driving airflow path, along the flow direction of the airflow, the second heat exchanger 102e is arranged upstream of the condenser 102b, so as to prevent the heat emitted by the condenser 102b from being absorbed by the second heat exchanger 102e, thereby ensuring the heat dissipation effect of both the condenser 102b and the second heat exchanger 102e at the same time.

[0053] In some embodiments provided by the present utility model, the internal heat exchange component 101 also includes a heating device 101c. The heating device 101c is disposed at the outlet or inlet of the circulation pump 101a. The performance of the battery cluster 201 will be affected by temperature. In a low temperature environment, the chemical reaction rate of the battery will slow down, resulting in a decrease in the output power of the battery, thereby affecting the power supply performance of the battery. By providing the heating device 101c, the cooling system 1 can increase the temperature of the battery cluster 201, accelerate the chemical reaction rate, and restore the normal performance of the battery. For example, the heating device 101c can be a positive temperature coefficient thermistor (Positive Temperature Coefficient, PTC). Of course, the heating device 101c can also be other electric heaters.

[0054] In some embodiments provided by the present utility model, the internal heat exchange component 101 further includes an expansion tank 101d. The expansion tank 101d is connected to the inlet or outlet of the circulation pump 101a. In this embodiment, the expansion tank 101d can be provided to supplement or buffer the coolant. For example, when the coolant in the pipeline is reduced, the coolant in the expansion tank 101d is supplemented. When the coolant pressure increases due to heating or excessive battery temperature, the coolant in the pipeline can enter the expansion tank 101d.

[0055] refer to Figure 2 As shown, in some embodiments provided by the present utility model, the external heat exchange component 102 is respectively connected to the internal heat exchange components 101 of at least two prefabricated energy storage cabins 2.

[0056] Such an arrangement enables the external heat exchange component 102 to simultaneously dissipate heat for the internal heat exchange components 101 of at least two energy storage prefabricated cabins 2 , thereby improving the efficiency of the cooling system 1 and reducing the power consumption of the cooling system 1 .

[0057] The utility model also provides a prefabricated energy storage cabin 2 in an embodiment.

[0058] Specifically, the energy storage prefabricated cabin 2 includes a battery cluster 201 and the cooling system 1 as described above.

[0059] It should be noted that the energy storage prefabricated cabin 2 includes the cooling system 1, and also includes all the above-mentioned advantages of the cooling system 1, which will not be repeated here.

[0060] In some embodiments provided by the present utility model, a fire-fighting module is provided inside the energy storage prefabricated cabin 2, and the internal heat exchange component 101 is arranged at the bottom or top of the fire-fighting module. Specifically, the height of the fire-fighting module is usually less than the internal height of the energy storage prefabricated cabin 2, so the internal heat exchange component 101 is arranged at the bottom or top of the fire-fighting module, which can make full use of the space in the height direction of the fire-fighting module, improve the space utilization rate, thereby being able to install more electricity and reduce the system watt-hour cost.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A cooling system, characterized in that: Applicable to a prefabricated energy storage cabin (2) having a battery cluster (201) disposed therein, the cooling system comprising an internal heat exchange component (101) and an external heat exchange component (102); The internal heat exchange component (101) is arranged inside the energy storage prefabricated cabin (2), and the internal heat exchange component (101) is connected to the battery cluster (201); the external heat exchange component (102) is arranged outside the energy storage prefabricated cabin (2), and the external heat exchange component (102) is detachably connected to the internal heat exchange component (101) via a joint (103); The internal heat exchange component (101) is used to exchange heat with the battery cluster (201) and transfer the heat to the external heat exchange component (102), and the external heat exchange component (102) is used to dissipate the heat.

2. The cooling system according to claim 1, characterized in that: The internal heat exchange component (101) comprises a circulation pump (101a), and the circulation pump (101a) is used to drive the coolant to circulate between the internal heat exchange component (101) and the battery cluster (201).

3. The cooling system according to claim 2, characterized in that: The internal heat exchange component (101) further comprises a first heat exchanger (101b), and the circulation pump (101a), the first heat exchanger (101b) and the battery cluster (201) are connected to form a first loop; The external heat exchange component (102) includes a compressor (102a), a condenser (102b) and an expansion element (102c), the outlet of the compressor (102a) is connected to the condenser (102b), the expansion element (102c) is connected to the outlet of the condenser (102b), and the inlet of the compressor (102a) and the outlet of the expansion element (102c) are both connected to the first heat exchanger (101b) through corresponding joints (103).

4. The cooling system according to claim 3, characterized in that: The external heat exchange component (102) further comprises a switch valve (102d), and the switch valve (102d) is provided between the inlet of the compressor (102a) and the corresponding joint (103) and between the outlet of the expansion element (102c) and the corresponding joint (103).

5. The cooling system according to any one of claims 2 to 4, characterized in that: The external heat exchange component (102) comprises a second heat exchanger (102e), and the second heat exchanger (102e) is respectively connected to the circulation pump (101a) and the battery cluster (201) through a joint (103) to form a second loop.

6. The cooling system according to claim 5, characterized in that The external heat exchange component (102) further comprises a one-way valve (102f), and the one-way valve (102f) is provided between the inlet of the second heat exchanger (102e) and the corresponding joint (103), and between the outlet of the second heat exchanger (102e) and the corresponding joint (103).

7. The cooling system according to any one of claims 2 to 4, characterized in that: The internal heat exchange component (101) further comprises a heating device (101c), wherein the heating device (101c) is arranged at the outlet or inlet of the circulation pump (101a); And / or, the internal heat exchange component (101) further comprises an expansion tank (101d), and the expansion tank (101d) is connected to the inlet or outlet of the circulation pump (101a).

8. The cooling system according to claim 1, characterized in that: The external heat exchange component (102) is respectively connected to the internal heat exchange components (101) of at least two of the prefabricated energy storage cabins (2).

9. A prefabricated energy storage cabin (2), characterized in that: The invention comprises a battery cluster (201) and a cooling system according to any one of claims 1 to 8.

10. The prefabricated energy storage cabin (2) according to claim 9, characterized in that: A fire-fighting module is provided inside the prefabricated energy storage cabin (2), and the internal heat exchange component (101) is arranged at the bottom or top of the fire-fighting module.

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