Energy storage container with self-cooling function

Abstract

The invention discloses an energy storage container with a self-cooling function, and belongs to the technical field of energy conservation, the energy storage container comprises a closed cavity formed by a plurality of plates, N plates in the plurality of plates comprise inner plates, outer plates and middle layers located between the outer plates and the inner plates, and N is larger than or equal to 1; a radiation coating is arranged on the outer surface of the outer plate, a cold guide pipe is arranged between the outer plate and the middle layer, and a heat transfer medium is arranged in the cold guide pipe. The energy consumption can be reduced, the energy efficiency of the container type energy storage system is improved, the reliability of the container type energy storage system is enhanced, and the cost of the container type energy storage system is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy conservation, and in particular relates to an energy storage container with a self-cooling function. Background Art

[0002] Energy storage container is an energy storage solution that has emerged in recent years with the development of the renewable energy industry, especially in situations where highly mobile and modular energy storage systems are required. It has the characteristics of high mobility, modularity, scalability, high independence, and environmental friendliness.

[0003] In the future, energy storage container technology will continue to innovate and improve, improve energy storage efficiency, reduce costs, enhance safety, and provide strong support for the sustainable development of the energy industry. At the same time, with the popularization of electric vehicles and the acceleration of electrification trends, energy storage containers will also serve as mobile charging stations for electric vehicles, providing more convenient and flexible charging solutions.

[0004] Lithium batteries have gradually become the mainstream product for energy storage due to their high energy, long service life, high rated voltage, high power tolerance, low self-discharge rate, and light weight. Although it has many advantages, its working environment requires a stable temperature. If the temperature is out of control, the battery capacity will be permanently reduced at best, and thermal runaway will be triggered, causing fire or explosion.

[0005] At present, containerized energy storage systems mainly rely on air conditioning and air cooling technology for cooling. This method has several limitations, including high energy consumption and high cost. Summary of the invention

[0006] The purpose of the present invention is to provide an energy storage container with a self-cooling function to overcome the defects of the prior art. The present invention can reduce energy consumption, improve the energy efficiency of the containerized energy storage system, enhance the reliability of the containerized energy storage system, and reduce the cost of the containerized energy storage system.

[0007] In order to achieve the above object, the present invention adopts the following technical scheme: An energy storage container with a self-cooling function comprises a closed cavity composed of a plurality of plates, wherein N plates among the plurality of plates include an inner plate, an outer plate, and an intermediate layer between the outer plate and the inner plate, wherein N≥1, specifically, the closed cavity is composed of six plates, namely a top plate, a rear plate, a front plate, a bottom plate, a first side plate, and a second side plate, when N=1, the top plate is preferably set to a multi-layer structure, when N=2, the top plate and the front plate are preferably set to a multi-layer structure, when N=3, the top plate, the front plate, and the rear plate are preferably set to a multi-layer structure, when N=4, the top plate, the front plate, the rear plate, and the first side plate are preferably set to a multi-layer structure, when N=5, the top plate, the front plate, the rear plate, the first side plate, and the second side plate are preferably set to a multi-layer structure, and when N=6, the top plate, the rear plate, the front plate, the bottom plate, the first side plate, and the second side plate are all set to a multi-layer structure; The outer surface of the outer plate is provided with a radiation coating, a cooling pipe is provided between the outer plate and the middle layer, and a heat transfer medium is provided in the cooling pipe.

[0008] Furthermore, the infrared emissivity of the radiation coating in the 8-13 μm band is greater than 85%; the sunlight reflectivity of the radiation coating in the 400-760 nm band is greater than 90%.

[0009] Furthermore, a pump is also included, and the pump is arranged on the cooling pipe and is used to drive the heat transfer medium to flow in the cooling pipe.

[0010] Furthermore, two holes are respectively provided on the inner plate and the middle layer, one of which is an inlet hole and the other is an outlet hole. The inlet holes and outlet holes on the inner plate and the middle layer are respectively provided correspondingly, and the cooling pipe passes through the inlet holes and the outlet holes in turn to form a closed loop.

[0011] Furthermore, it also includes a heat exchanger, which is located in a closed cavity, and the medium outlet of the heat exchanger is connected to the medium inlet of the cooling pipe, and the medium return port of the heat exchanger is connected to the outlet of the cooling pipe.

[0012] Furthermore, a refrigeration device is included, and the refrigeration device includes a radiator, a heat absorber, a compressor and an expansion device; The heat absorber and the expansion device are located inside the closed cavity, and the radiator and the compressor are located outside the closed cavity; The inner plate and the middle layer are respectively provided with two holes, one of which is an inlet hole and the other is an outlet hole. The inlet hole and the outlet hole on the inner plate and the middle layer are respectively provided correspondingly. After the cooling pipe passes through the inlet hole, it is sequentially connected to the expansion device, the heat absorber, the compressor, the radiator and the outlet hole to form a closed loop.

[0013] Furthermore, the cooling pipes between the outer plate and the middle layer are arranged in a serpentine shape.

[0014] Furthermore, the cross-sectional shape of the cooling pipe is D-shaped or racetrack-shaped.

[0015] Furthermore, the cooling pipe and the outer plate are an integrated structure to form a microchannel flat tube structure.

[0016] Furthermore, the middle layer is a heat insulation layer, and the thermal conductivity of the material of the heat insulation layer is less than or equal to 1 W / (mK).

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: The energy storage container with self-cooling function of the present invention is composed of a closed cavity formed by a plurality of plates, wherein N plates have the structure of an inner plate, an outer plate and a heat insulation layer, wherein N≥1, the outer surface of the outer plate has a radiation coating, and a cooling pipe is provided between the outer plate and the heat insulation layer, and a heat transfer medium is provided in the cooling pipe. Since the temperature of outer space is about 4K, and the transmittance of the atmosphere in the 8-13μm band is relatively high, a radiation coating with high emissivity in the 8-13μm band is used to radiate heat to outer space, thereby reducing its own temperature, and the generated cold is transferred to the heat transfer medium in the cooling pipe by heat conduction, and the heat transfer medium is then transferred to the interior of the box or the air-conditioning unit in a related form, thereby achieving the effects of reducing energy consumption, improving energy efficiency, and enhancing reliability.

[0018] The energy storage container with self-cooling function of the present invention is coated with a radiation coating. Since the infrared emissivity of the radiation coating in the 8-13μm band is greater than 85%; and the sunlight reflectivity of the radiation coating in the 400-760nm band is greater than 90%, it not only has the function of protecting against sunlight and reducing the temperature of the upper side plate during the day, but also has a self-cooling function, realizing self-cooling of the energy storage container during the day and at night, thereby having the advantage of low energy consumption.

[0019] The shape of the cooling tube of the present invention is D-shaped or runway-shaped, so that the contact mode between the cooling tube and the outer plate 101 is changed from linear contact to surface contact. This design significantly increases the contact area between the cooling tube and the outer plate, thereby improving the heat transfer path and improving the heat exchange efficiency. In addition, due to the contact mode of the D-shaped or runway-shaped cooling tube, the thermal resistance in the heat transfer process is reduced, so that heat can be transferred more quickly, and the overall heat transfer efficiency is improved. The design of the D-shaped or runway-shaped cooling tube may also enhance the stability of the structure to a certain extent, especially when subjected to internal heat transfer medium pressure and external mechanical stress, and can provide better support and stability.

[0020] Among the several panels constituting the energy storage container with self-cooling function of the present invention, at least one panel is movable, so as to facilitate people or objects to enter the energy storage container with self-cooling function.

[0021] Furthermore, the middle layer serves as an insulation layer, and the thermal conductivity of the insulation layer material is less than or equal to 1W / (mK). The insulation layer material with a thermal conductivity less than or equal to 1W / (mK) can significantly reduce the transfer of heat and effectively isolate the influence of the external environment on the temperature inside the energy storage container. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is the overall structure diagram of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 A top view of the present invention; Figure 4 This is a schematic diagram of the refrigeration unit in the present invention; Figure 5 This is a schematic diagram of a D-type cooling tube in the present invention; Figure 6 It is a schematic diagram of the racetrack-type cooling tube in the present invention.

[0024] Among them, 1. top plate; 2. back plate; 3. front plate; 4. bottom plate; 5. first side plate; 6. second side plate; 7. radiation coating; 8. heat exchanger; 9. integral outlet hole; 10. integral inlet hole; 11. closed cavity; 12. pump; 13. air conditioning unit; 101. outer plate; 102. inner plate; 103. middle layer; 104. cooling pipe; 1301. radiator; 1302. heat absorber; 1303. compressor; 1304. expansion valve. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] As cited in the background technology, currently, container-type energy storage systems mainly rely on air conditioning and air cooling technology for cooling. This method has several limitations, including high energy consumption and high cost. The present invention provides an energy storage container with a self-cooling function, wherein the energy storage container with a self-cooling function is composed of six plates to form a closed cavity 11, wherein N plates have a structure of an inner plate 102, an outer plate 101 and an intermediate layer 103, wherein N ≥ 1. The outer surface of the outer plate 101 has a radiation coating 7, and a cooling pipe 104 is provided between the outer plate 101 and the intermediate layer 103, wherein the cooling pipe 104 has a heat transfer medium. Since the temperature of outer space is about 4K, if there is no atmosphere and the emissivity is 1, the energy radiated outward from the surface of a 300K object on Earth is 459W / m 2 Therefore, the surface temperature of the object will gradually decrease until the energy radiated to outer space at a certain temperature is equal to the external heat transfer it receives. However, since the earth has an atmosphere, the energy radiated from the surface of the earth to outer space will be absorbed by the atmosphere and reflected back. However, the atmosphere has a high transmittance in the 8-13μm band. Therefore, using a radiation coating 7 with high emissivity in the 8-13μm band to radiate heat to outer space can reduce its own temperature, and transfer the generated cold to the heat transfer medium in the cooling pipe 104 by heat conduction. The heat transfer medium is then transferred to the inside of the box or the air-conditioning unit in a related form, thereby achieving the effects of reducing energy consumption, improving system energy efficiency, and enhancing system reliability.

[0028] Embodiment 1 An energy storage container with a self-cooling function comprises a closed cavity 11 formed by a plurality of plates, wherein N plates comprise an inner plate 102, an outer plate 101 and an intermediate layer 103 between the outer plate 101 and the inner plate 102, wherein N≥1; The outer surface of the outer plate 101 is provided with a radiation coating 7 , a cooling pipe 104 is provided between the outer plate 101 and the intermediate layer 103 , and a heat transfer medium is provided in the cooling pipe 104 .

[0029] In the energy storage container with self-cooling function of the present invention, the radiation coating lowers its own temperature by emitting long-wave radiation into outer space, and transfers the cold generated by the radiation coating 7 to the heat transfer medium in the cooling pipe by heat conduction, and the heat transfer medium is then transferred to the inside of the box or the air-conditioning unit in a related form, thereby achieving the effects of reducing energy consumption, improving energy efficiency, and enhancing reliability.

[0030] Embodiment 2 like Figure 1 As shown, the present invention provides an energy storage container with a self-cooling function, the main body of which includes a top plate 1, a rear plate 2, a front plate 3, a bottom plate 4, a first side plate 5 and a second side plate 6, and the top plate 1, the rear plate 2, the front plate 3, the bottom plate 4, the first side plate 5 and the second side plate 6 together constitute a closed cavity 11. The top plate 1 is composed of a three-layer structure, namely an outer plate 101, an inner plate 102 and an intermediate layer 103. Preferably, the intermediate layer is a heat insulation layer. The materials of the inner plate 102 and the outer plate 101 can be stainless steel, copper, aluminum alloy and other metal materials. Preferably, the material of the outer plate 101 is stainless steel. The other panels such as the bottom plate 4, the front plate 3, the rear plate 2, the first side plate 5 and the second side plate 6 can be a single-layer structure or a multi-layer structure like the top plate 1. Specifically, when it is a multi-layer structure, the bottom plate 4, the front plate 3, the rear plate 2, the first side plate 5 and the second side plate 6 are also a multi-layer structure composed of an outer plate 101, an inner plate 102 and an intermediate layer 103.

[0031] Furthermore, the outer surface of the roof 1 is coated with a radiation coating 7, the infrared emissivity of the radiation coating 7 in the 8-13 μm band is greater than 85%, and the sunlight reflectivity of the radiation coating 7 in the 400-760 nm band is greater than 90%, preferably, the infrared emissivity of the radiation coating 7 in the 8-13 μm band is greater than 90%, and the sunlight reflectivity of the radiation coating 7 in the 400-760 nm band is greater than 97%. Therefore, the energy storage container coated with the radiation coating 7 not only has the function of preventing sunlight and reducing the temperature of the roof 1 during the day, but also has a self-cooling function, realizing the self-cooling of the energy storage container during the day and at night, thereby having the advantage of low energy consumption.

[0032] In order to transfer the cooling energy of the radiation coating 7 on the outside of the top plate 1 to the air in the box, a cooling pipe 104 is provided between the outer plate 102 and the middle layer 103, and a heat transfer medium is provided in the cooling pipe 104.

[0033] Embodiment 3 On the basis of implementation two, the cooling tube 104 is in close contact with the outer panel 101 by means of screws, welding and clamps. Whether it is screw connection, welding connection or clamp connection, it can ensure the close contact between the cooling tube 104 and the outer panel 101. This close contact helps to reduce thermal resistance and improve heat conduction efficiency. In the process of the cooling tube 104 transferring heat to the outer panel 101, the close contact can ensure that the heat is transferred more efficiently, thereby improving the heat dissipation performance. The heat transfer medium in the cooling tube 104 can be liquids such as water and antifreeze. The material of the cooling tube 104 can be copper, aluminum, stainless steel, etc., preferably, copper or aluminum. Therefore, the cold generated by the radiation coating 7 is transferred to the heat transfer medium in the cooling tube 104 through the outer panel 102. Figure 3 As shown, in order to improve the cooling efficiency, the cooling pipe 104 is arranged in a coil form. In addition, in order to achieve good heat exchange between the cooling pipe 104 and the outer plate 101, the cross-sectional shape of the cooling pipe 104 is D-shaped (such as Figure 5 as shown) or runway type (as shown Figure 6 As shown in the figure), the D-type or racetrack-type structure changes its contact mode with the outer plate 101 from linear contact to surface contact. This design significantly increases the contact area between the cooling tube 104 and the outer plate 101, thereby improving the heat transfer path and improving the heat exchange efficiency. In addition, due to the contact mode of the D-type or racetrack-type cooling tube 104, the thermal resistance in the heat transfer process is reduced, so that heat can be transferred more quickly, thereby improving the overall heat transfer efficiency. The design of the D-type or racetrack-type cooling tube 104 may also enhance the stability of the structure to a certain extent, especially when subjected to internal heat transfer medium pressure and external mechanical stress, and can provide better support and stability.

[0034] In order to cooperate with the cooling pipe 104 to transfer cold energy to the energy storage container, there is an exit hole and an entry hole in the inner plate 102 and the middle layer 103 respectively. The entry hole and the exit hole on the inner plate 102 and the middle layer 103 are respectively arranged correspondingly to form an integral entry hole 10 and an integral exit hole 9. The cooling pipe 104 passes through the integral entry hole 10 and the integral exit hole 9 in turn to form a closed loop.

[0035] In order to reduce the heat transfer resistance between the heat transfer medium and the radiation coating 7, the cooling pipe 104 in contact with the outer plate 101 is arranged in a serpentine shape on the outer plate 101, such as Figure 3 As shown, the contact area between the cooling pipe 104 and the outer plate 101 is increased as much as possible.

[0036] In addition, the outer plate 101 is a microchannel flat tube, and the cooling tube 104 and the outer plate 101 are an integrated structure, that is, the cooling tube 104 is a channel of the microchannel flat tube.

[0037] Embodiment 4 On the basis of the third embodiment, more preferably, a heat exchanger 8 is further provided inside the energy storage container, and the heat exchanger 8 has an inlet and an outlet respectively connected to the cooling pipe 104. Further, a fan is provided on the heat exchanger 8. Further, a pump 12 is provided inside the energy storage container, and the pump 12 is connected to the cooling pipe 104 and the heat exchanger 8, and is used to drive the heat transfer medium to flow between the cooling pipe 104 and the heat exchanger 8.

[0038] Furthermore, at least one of the front panel 3, the rear panel 2, the first side panel 5, and the second side panel 6 is movable, so as to facilitate people or objects to enter the energy storage container. Of course, the front panel 3, the rear panel 2, the first side panel 5, and the second side panel 6 may all be movable panels.

[0039] Furthermore, the energy storage container has energy storage batteries, lighting and other items inside.

[0040] Furthermore, the middle layer 103 serves as an insulation layer, and the thermal conductivity of the insulation layer material is less than or equal to 1W / (mK). The insulation layer material with a thermal conductivity less than or equal to 1W / (mK) can significantly reduce the transfer of heat and effectively isolate the influence of the external environment on the temperature inside the energy storage container.

[0041] Embodiment 5 Based on the first embodiment, the energy storage container with self-cooling function further includes an air conditioning unit 13. Figure 4 As shown, the air conditioning unit 13 comprises a radiator 1301, a heat absorber 1302, a compressor 1303, and an expansion valve 1304. The heat absorber 1302 and the expansion valve 1304 are located inside the closed cavity 11, and the radiator 1301 and the compressor 1303 are located outside the closed cavity 11.

[0042] In the present invention, two holes are respectively arranged on the inner plate 102 and the middle layer 103, one of which is an inlet hole and the other is an outlet hole. The inlet hole and the outlet hole on the inner plate 102 and the middle layer 103 are respectively arranged correspondingly to form an integral inlet hole 10 and an integral outlet hole 9. In order to reduce the operating power consumption of the air-conditioning unit 13, the cooling pipe 104 passes through the integral inlet hole 10 and is sequentially connected to the expansion valve 1304, the heat absorber 1302, the compressor 1303, the radiator 1301 and the integral outlet hole 9 to form a closed loop. In this case, part of the heat of the air-conditioning unit is dissipated through the radiator 1301, and part of the heat is dissipated through the cooling pipe 104. For example, when the working medium CO2 is running in the air-conditioning unit 13 and is in a transcritical cycle, the cooling pipe 104 can reduce the inlet temperature of the expansion valve 1304 to below the ambient temperature, which can effectively improve the operating efficiency of the air-conditioning unit.

[0043] The working principle of the present invention is as follows: the radiation coating 7 of the top plate 1 lowers its own temperature by emitting long-wave radiation into outer space, and transfers the generated cold to the heat transfer medium in the cooling pipe 104 by heat conduction. The heat transfer medium is then transferred to the inside of the box or the air-conditioning unit in a related form, thereby achieving the effect of reducing energy consumption.

[0044] Specifically, the working principle of the present invention is that the top plate 1, as one of the core components of the present invention, is covered with a radiation coating 7 (for example, a radiation coating composed of a white bottom layer of zirconium dioxide with a reflectivity of >98% and an ultra-thin top layer (SrO·Al2O3:Eu) formed by blue phosphor). This radiation coating 7 has excellent radiation performance and can efficiently transmit the solar radiation heat absorbed by the top plate 1 and the heat in the surrounding environment in the form of long-wave radiation to the low-temperature heat source of outer space. Since the outer space is close to absolute zero, this radiation process is essentially a significant heat loss process, which effectively reduces the temperature of the top plate 1 and its surrounding environment.

[0045] Next, the top plate 1 transfers the cold energy generated by the radiation coating 7 to the cooling tube 104 closely connected to it through a precise heat conduction mechanism. The cooling tube 104 serves as a bridge for heat transfer and is filled with a highly efficient heat transfer medium. This heat transfer medium not only has good thermal conductivity, but also maintains stable physical and chemical properties in a low-temperature environment, ensuring efficient and reliable heat transfer. As the temperature of the top plate 1 decreases, the heat transfer medium quickly absorbs and carries the cold energy, and transports the cold energy to the next link of the system through the flow of the cooling tube 104.

[0046] Subsequently, the heat transfer medium carrying cold energy exchanges heat with the heat circulation system inside the box or the air conditioning unit through a specific heat exchange device. In this process, the heat transfer medium releases the cold energy it carries, effectively reducing the temperature inside the box or the working environment of the air conditioning unit, thereby reducing the air conditioning unit's dependence on external cooling energy and achieving the goal of reducing energy consumption.

[0047] In summary, the present invention forms an energy storage container with a self-cooling function through radiation cooling of the top plate 1, heat conduction to the heat transfer medium in the cooling tube 104, and then transfers the cold to the target area via the heat exchange device. This provides strong technical support for improving the energy efficiency of containerized energy storage systems, enhancing the reliability of containerized energy storage systems, and reducing the cost of containerized energy storage systems.

[0048] Finally, it should be noted that the above-listed embodiments exist only as one or more specific forms of expression of the technical solution of the present invention. Their purpose is to clearly explain the concept, principle and application of the present invention through specific examples, and it is by no means intended to limit the protection scope of the present invention to these specific embodiments. In fact, the real value of the present invention lies in the technical ideas and innovations it proposes, rather than its form of expression or means of implementation.

[0049] For ordinary technicians in the relevant technical field, after in-depth reading and understanding of the technical solution of the present invention, they are fully capable of making various forms of changes, modifications or equivalent substitutions to the specific implementation methods of the invention based on their own professional knowledge and skills. These changes may include but are not limited to: adjusting the value range of technical parameters, optimizing algorithm processes to improve efficiency, replacing some technical components to achieve better compatibility or reduce costs, etc. As long as these changed technical solutions still substantially maintain the technical features claimed for protection by the original invention, that is, they can still achieve the core functions and effects of the present invention, then these changes should be deemed to fall within the scope of protection of the pending claims of the present invention.

[0050] In addition, with the continuous progress and development of technology, new technical means and methods continue to emerge, which also provides broad space for further improvement and perfection of the present invention. Therefore, the protection scope of the present invention should also include those reasonably foreseeable improvements and extensions based on the existing technology. As long as these improvements and extensions do not deviate from the basic principles and core concepts of the present invention, they should be regarded as equivalents of the present invention and are also protected by patent rights.

Claims

1. An energy storage container with self-cooling function, It is characterized in that The invention comprises a closed cavity (11) formed by a plurality of plates, wherein N plates of the plurality of plates include an inner plate (102), an outer plate (101), and an intermediate layer (103) located between the outer plate (101) and the inner plate (102), wherein N≥1; The outer surface of the outer plate (101) is provided with a radiation coating (7), a cooling pipe (104) is provided between the outer plate (101) and the intermediate layer (103), and a heat transfer medium is provided in the cooling pipe (104).

2. An energy storage container with self-cooling function according to claim 1, It is characterized in that The infrared emissivity of the radiation coating (7) in the 8-13 μm band is greater than 85%; the sunlight reflectivity of the radiation coating (7) in the 400-760 nm band is greater than 90%.

3. The energy storage container with self-cooling function according to claim 1, It is characterized in that It also comprises a pump (12), wherein the pump (12) is arranged on the cooling pipe (104) and is used to drive the heat transfer medium to flow in the cooling pipe (104).

4. The energy storage container with self-cooling function according to claim 1, It is characterized in that The inner plate (102) and the middle layer (103) are respectively provided with two holes, one of which is an inlet hole and the other is an outlet hole. The inlet hole and the outlet hole on the inner plate (102) and the middle layer (103) are respectively provided correspondingly, and the cooling pipe (104) passes through the inlet hole and the outlet hole in sequence to form a closed loop.

5. The energy storage container with self-cooling function according to claim 4, It is characterized in that It also includes a heat exchanger (8), the heat exchanger (8) being located in the closed cavity (11), and the medium outlet of the heat exchanger (8) being connected to the medium inlet of the cooling pipe (104), and the medium return port of the heat exchanger (8) being connected to the outlet of the cooling pipe (104).

6. The energy storage container with self-cooling function according to claim 1, It is characterized in that Also included is a refrigeration device, the refrigeration device comprising a radiator (1301), a heat absorber (1302), a compressor (1303) and an expansion device; The heat absorber (1302) and the expansion device are located inside the closed cavity (11), and the radiator (1301) and the compressor (1303) are located outside the closed cavity (11); The inner plate (102) and the middle layer (103) are respectively provided with two holes, one of which is an inlet hole and the other is an outlet hole. The inlet hole and the outlet hole on the inner plate (102) and the middle layer (103) are respectively provided correspondingly. The cooling pipe (104) passes through the inlet hole and is sequentially connected to the expansion device, the heat absorber (1302), the compressor (1303), the radiator (1301) and the outlet hole to form a closed loop.

7. The energy storage container with self-cooling function according to claim 1, It is characterized in that The cooling pipes (104) between the outer plate (101) and the middle layer (103) are arranged in a serpentine shape.

8. The energy storage container with self-cooling function according to claim 1, It is characterized in that The cross-sectional shape of the cooling pipe (104) is D-shaped or racetrack-shaped.

9. The energy storage container with self-cooling function according to claim 1, It is characterized in that The cooling pipe (104) and the outer plate (101) are an integrated structure, forming a microchannel flat tube structure.

10. The energy storage container with self-cooling function according to claim 1, It is characterized in that The middle layer (103) is a heat insulation layer, and the thermal conductivity of the material of the heat insulation layer is less than or equal to 1 W / (mK).

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