Energy storage system uses outer machine - inner machine - evaporator three stage refrigeration circuit system

Abstract

The present application relates to the technical field of energy storage cabinet refrigeration, in particular to an external machine-internal machine-evaporator three-stage refrigeration circuit system for an energy storage system, comprising an energy storage cabinet body, an external machine top opening device and a ventilation window installed on the top end and side wall of the energy storage cabinet body, and an internal machine refrigeration device and an evaporator device installed inside the energy storage cabinet body, a refrigeration machine is installed on one side of the energy storage cabinet body, and the refrigeration machine is connected with the internal machine refrigeration device and the evaporator device. Through the design of the external machine top opening device and the ventilation window, the top shutter and the louvers are opened or closed, the heat dissipation performance of the energy storage cabinet body is effectively improved, the internal machine refrigeration device cools the whole inside of the energy storage cabinet body, the evaporator device cools the battery pack, eliminates local hot spots, and meets the strict requirements of the energy storage system on temperature control.

Description

Technical Field

[0001] This invention relates to the field of energy storage cabinet refrigeration technology, specifically a three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator for energy storage systems. Background Technology

[0002] An energy storage cabinet is a device specifically designed to store electrical energy. Its core function is to store electrical energy when the power supply is sufficient and release it when the power demand is high or when the power is insufficient, so as to balance the power supply and demand, improve the reliability of power supply, and realize economic value such as peak-valley arbitrage.

[0003] Patent application number CN202410605391.3 discloses a direct cooling system for an energy storage cabinet and an energy storage cabinet. The direct cooling system is formed by connecting a compressor, a condenser, a regenerator, and a battery cell cooling component through refrigerant pipelines. It includes: a battery cell cooling module comprising: multiple battery cell refrigerant pipelines connected in parallel, with the inlet and outlet of each battery cell refrigerant pipeline connected to the regenerator; multiple first direct cooling components connected to the multiple battery cell refrigerant pipelines for cooling and heat dissipation of multiple energy storage batteries in the energy storage cabinet; and an energy storage dehumidification module for dehumidification.

[0004] Current mainstream solutions generally use separate cooling pipes to cool the energy storage cabinet. However, the temperature inside the energy storage cabinet is not cooled comprehensively enough, and the cooling and heat dissipation methods cannot be adapted to different temperatures as the degree of operation changes, resulting in incomplete cooling and heat dissipation inside the cabinet.

[0005] In view of this, we propose a three-stage refrigeration loop system for energy storage systems, consisting of an outdoor unit, an indoor unit, and an evaporator. Summary of the Invention

[0006] In order to overcome the defects in the prior art, the purpose of this invention is to provide a three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator for energy storage system. The outdoor unit uses a top-opening device for mechanical heat dissipation, the indoor unit uses a refrigeration device to cool the entire interior of the energy storage cabinet, and the evaporator device uses a point-to-point cooling device for the battery pack to eliminate local hot spots, thereby solving the problems in the background art.

[0007] To achieve the above objectives, the present invention provides a three-stage refrigeration loop system for an energy storage system, comprising an energy storage cabinet, an outdoor unit top-opening device and a ventilation window installed on the top and side walls of the energy storage cabinet, and an indoor unit refrigeration device and an evaporator device installed inside the energy storage cabinet. A refrigeration unit is installed on one side of the energy storage cabinet, and the refrigeration unit is connected to the indoor unit refrigeration device and the evaporator device.

[0008] The outdoor unit top-opening device includes a first threaded rod rotatably connected to the top of the energy storage cabinet, a top cover plate hinged to both sides of the first threaded rod, and a second threaded rod rotatably connected to two opposite side walls of the energy storage cabinet; the second threaded rod is drivenly connected to the first threaded rod.

[0009] The internal cooling device includes several long rods slidably connected in two groups inside the energy storage cabinet, a shielding cloth connected between two adjacent long rods, a serpentine cooling pipe installed at the bottom inside the energy storage cabinet, and a third threaded rod rotatably connected to both sides of the bottom inside the energy storage cabinet; one end of the third threaded rod is drivenly connected to the second threaded rod.

[0010] The evaporator device includes several battery brackets installed inside the energy storage cabinet and an evaporator installed at the bottom center of the battery brackets; the evaporator is connected to the refrigeration unit through a delivery pipe.

[0011] This design takes into account the diverse cooling and heat dissipation needs of the energy storage cabinet under different operating conditions. An external unit top-opening device is designed; by rotating the first threaded rod, the top covers hinged to both sides can rotate simultaneously, enabling the top to open and close. This facilitates rapid heat dissipation at high temperatures and maintains the cabinet's airtightness when heat dissipation is not required, preventing dust and moisture from entering.

[0012] The internal refrigeration unit works by opening the top cover using a long rod to open the cover cloth, exposing the serpentine cooling pipes, thus achieving overall cooling of the energy storage cabinet's interior. These serpentine cooling pipes, connected to the refrigeration unit, circulate refrigerant into the cabinet, effectively absorbing heat and lowering the temperature.

[0013] The evaporator unit focuses on point-to-point cooling of the battery pack, eliminating localized hot spots. The battery bracket design provides stable support for the batteries. The evaporator is installed at the bottom center of the battery bracket and connected to the chiller via a delivery pipe, enabling direct cooling of the batteries. This ensures the batteries maintain a suitable temperature during operation, extending their lifespan.

[0014] In summary, the three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator in the energy storage system achieves comprehensive, efficient, and flexible cooling and heat dissipation of the energy storage cabinet through the coordinated operation of the outdoor unit top-opening device, the indoor unit refrigeration device, and the evaporator device.

[0015] As a further improvement to this technical solution, a solar panel is installed at the top of the top cover, and scrapers are slidably connected to both ends of the top cover. The scraper is threadedly connected to the end of the first threaded rod near the first threaded rod, and the threads at both ends of the first threaded rod are in opposite directions.

[0016] This system features solar panels mounted on the top of the shroud that absorb solar energy during the day and convert it into electricity, providing auxiliary energy for the energy storage system and reducing overall energy consumption. Meanwhile, scrapers slidably connected at both ends of the shroud move simultaneously towards the center or sides when the first threaded rod rotates. This automatic cleaning of the shroud surface prevents dust and debris from accumulating and affecting the solar panel's power generation efficiency and the shroud's heat dissipation.

[0017] As a further improvement to this technical solution, a first bevel gear is welded and fixed to both ends of the first threaded rod, and a second bevel gear is welded and fixed to both ends of the second threaded rod, with the first bevel gear and the second bevel gear meshing in close proximity.

[0018] This configuration achieves linkage between the first and second threaded rods through the meshing transmission of the first and second bevel gears. When the first threaded rod rotates, the second threaded rod rotates synchronously.

[0019] As a further improvement to this technical solution, a motor is installed on the side wall of the energy storage cabinet, and the output shaft of the motor is coaxially connected to the first threaded rod.

[0020] This setup achieves electric control of the rotation of the first threaded rod by installing a motor on the side wall of the energy storage cabinet and coaxially connecting the motor's output shaft with the first threaded rod.

[0021] As a further improvement to this technical solution, the upper section of the second threaded rod is threadedly connected to a threaded block, and the top of the energy storage cabinet is slidably connected to both sides of the threaded block. A first support rod is hinged between the T-shaped slider and the threaded block, and a second support rod is hinged between the other end of the T-shaped slider and the bottom end of the top cover plate. A rack is welded and fixed to the bottom end of the T-shaped slider.

[0022] This setup uses the rotation of the second threaded rod to move the threaded block up and down. The threaded block pushes the T-shaped slider to slide at the top of the energy storage cabinet via the first support rod. The T-shaped slider then drives the top cover to rotate via the second support rod, thus opening and closing the top cover.

[0023] As a further improvement to this technical solution, the ventilation window includes a window frame welded and fixed to the side wall of the energy storage cabinet and several louvers rotatably connected to each other within the window frame. A first gear is welded and fixed to the top of one of the louvers, and the first gear meshes with the rack. A dustproof net is installed on the inner side of the window frame.

[0024] This design utilizes a rack welded to the bottom of a T-shaped slider, which meshes with the first gear at the top of the louvers. When the T-shaped slider slides, it rotates the louvers, thus opening and closing the ventilation window. This allows the ventilation window to open simultaneously when the top cover is open for heat dissipation, enhancing air circulation and improving heat dissipation efficiency. A dustproof mesh installed inside the window frame effectively prevents dust and debris from entering the energy storage cabinet, protecting the internal equipment from damage.

[0025] As a further improvement to this technical solution, a third bevel gear is welded and fixed to one end of the third threaded rod near the side wall of the energy storage cabinet, and the third bevel gear meshes with the adjacent second bevel gear.

[0026] This design achieves linkage between the third and second threaded rods by meshing the third bevel gear with the adjacent second bevel gear. When the second threaded rod rotates, it drives the third threaded rod to rotate synchronously, causing the long rod in the internal refrigeration unit to slide, opening the shielding cloth and exposing the serpentine cooling pipes, thus accelerating the cooling inside the cabinet.

[0027] As a further improvement to this technical solution, a protrusion is welded and fixed at the middle of the bottom end of the long bar located in the middle, and the end of the third threaded rod away from the side wall of the energy storage cabinet is threadedly connected to the protrusion nearby. The serpentine cooling pipe is connected to the refrigeration unit.

[0028] This design utilizes a threaded connection between a third threaded rod and a protrusion. When the third threaded rod rotates, it causes the long rod in the middle to slide, opening the shielding cloth. The connection between the serpentine cooling pipe and the refrigeration unit ensures that the refrigerant can circulate continuously and stably within the cooling pipe.

[0029] As a further improvement to this technical solution, a soft rubber pad is adhered and fixed to the inner wall of the battery bracket, and a secondary bracket is provided at the middle of the bottom end of the battery bracket.

[0030] The soft rubber pads that are adhesively fixed to the inner wall of the battery holder provide good cushioning and protection for the battery. The secondary bracket located at the bottom center of the battery holder is used to install the evaporator, ensuring the evaporator's cooling effect on the battery.

[0031] As a further improvement to this technical solution, several fans are installed on the top of the energy storage cabinet, and several ventilation holes are opened on the side wall of the energy storage cabinet corresponding to the ventilation window.

[0032] The installation of several fans at the top of the energy storage cabinet enhances airflow inside the cabinet when needed. Meanwhile, several ventilation holes on the side walls of the cabinet, corresponding to the ventilation windows, ensure smooth airflow into and out of the cabinet, creating excellent air convection.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] 1. This energy storage system employs a three-stage refrigeration loop system consisting of an outdoor unit, an indoor unit, and an evaporator. Through the coordinated operation of the outdoor unit's top-opening device, the indoor unit's refrigeration unit, and the evaporator, comprehensive and flexible cooling and heat dissipation of the energy storage cabinet are achieved. The outdoor unit's top-opening device can open or close the top cover as needed, rapidly dissipating heat at high temperatures and maintaining a sealed cabinet to prevent dust and moisture from entering when heat dissipation is not required. The indoor unit's refrigeration unit opens with the top cover, revealing the serpentine cooling pipes for overall cooling of the energy storage cabinet's interior. The evaporator focuses on point-to-point cooling of the battery pack, eliminating localized hot spots and ensuring the batteries maintain a suitable temperature during operation, thus extending their lifespan.

[0035] 2. This energy storage system uses a three-stage refrigeration loop system consisting of an outdoor unit, an indoor unit, and an evaporator. Through solar panels installed at the top of the roof shroud, it effectively absorbs solar energy during the day and converts it into electricity, providing auxiliary energy for the entire system and thus reducing overall energy consumption, achieving energy conservation and environmental protection. Simultaneously, the scraper design with sliding connections at both ends of the roof shroud allows both scrapers to move simultaneously towards the center or sides when the first threaded rod rotates, providing an automatic cleaning function for the roof shroud surface and effectively preventing the accumulation of dust and debris. Attached Figure Description

[0036] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is one of the overall structural cross-sectional views of the present invention;

[0039] Figure 3 This is an exploded view of the overall structure of the present invention;

[0040] Figure 4 This is an exploded view of the structure of the outdoor unit top-opening device of the present invention;

[0041] Figure 5 This is an exploded view of the ventilation window structure of the present invention;

[0042] Figure 6 This is an exploded view of the internal refrigeration device structure of the present invention;

[0043] Figure 7This is a schematic diagram of the evaporator device structure of the present invention;

[0044] Figure 8 This is a second sectional view of the overall structure of the present invention;

[0045] Figure 9 For the present invention Figure 2 Enlarged view of the structure of A in the middle;

[0046] Figure 10 For the present invention Figure 2 Enlarged view of the structure of B in the middle;

[0047] Figure 11 For the present invention Figure 3 Enlarged view of the structure of C in the middle;

[0048] The meanings of the labels in the diagram are as follows:

[0049] 100. Energy storage cabinet; 110. Fan; 120. Ventilation vent;

[0050] 200. Outdoor unit top opening device; 210. Top cover plate; 211. Solar panel; 212. Scraper; 220. First threaded rod; 221. First bevel gear; 230. Second threaded rod; 231. Second bevel gear; 240. Threaded block; 250. First support rod; 260. Second support rod; 270. T-shaped slider; 280. Rack; 290. Motor;

[0051] 300. Ventilation window; 310. Window frame; 320. Louver; 330. First gear; 340. Dustproof net;

[0052] 400. Internal refrigeration unit; 410. Long bar; 411. Protrusion; 420. Shielding cloth; 430. Third threaded rod; 431. Third bevel gear; 440. Serpentine cooling pipe;

[0053] 500. Evaporator unit; 510. Battery bracket; 511. Auxiliary bracket; 520. Evaporator; 530. Delivery pipe;

[0054] 600. Refrigeration unit. Detailed Implementation

[0055] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, and these should all be considered to fall within the scope of the invention. The terms "installation" and "connection" should be interpreted broadly, referring to direct connection or indirect connection through an intermediate medium.

[0056] The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0057] Please see Figures 1-3 As shown, the present invention provides a three-stage refrigeration loop system for an energy storage system, comprising an energy storage cabinet 100, an outdoor unit top-opening device 200 and a ventilation window 300 installed on the top and side walls of the energy storage cabinet 100, and an indoor unit refrigeration device 400 and an evaporator device 500 installed inside the energy storage cabinet 100. A refrigeration unit 600 is installed on one side of the energy storage cabinet 100, and the refrigeration unit 600 is connected to the indoor unit refrigeration device 400 and the evaporator device 500.

[0058] Several fans 110 are installed on the top of the energy storage cabinet 100, and several ventilation holes 120 are opened on the side wall of the energy storage cabinet 100 corresponding to the ventilation window 300. The fans 110 can be activated when the internal temperature of the energy storage cabinet 100 is high, accelerating the air flow inside the cabinet. Together with the ventilation window 300 and ventilation holes 120, they form a good ventilation and heat dissipation effect.

[0059] For details, please refer to Figure 4 As shown, the outdoor unit top-opening device 200 includes a first threaded rod 220 rotatably connected to the top of the energy storage cabinet 100, a top cover plate 210 hinged to both sides of the first threaded rod 220, and a second threaded rod 230 rotatably connected to the two opposite side walls of the energy storage cabinet 100. The second threaded rod 230 is connected to the first threaded rod 220. The rotation of the first threaded rod 220 drives the hinged top cover plate 210 to rotate, realizing the opening and closing action of the top. This helps to quickly dissipate heat from the cabinet in a high-temperature environment, while maintaining the sealed state of the cabinet when heat dissipation is not required, effectively preventing dust and moisture from entering the cabinet and damaging the internal equipment. At the same time, the energy storage cabinet 100 has a built-in humidity sensor and dehumidifier. When the humidity inside the cabinet is detected to be too high, the built-in dehumidifier will expel the moisture from the cabinet.

[0060] For further details, please refer to Figure 9As shown, a solar panel 211 is mounted on the top of the top cover 210. Scrapers 212 are slidably connected to both ends of the top cover 210. The end of the scraper 212 closest to the first threaded rod 220 is threaded to it. The threads at both ends of the first threaded rod 220 are in opposite directions. The solar panel 211 is designed to convert solar energy into electrical energy, providing auxiliary energy for the energy storage system, reducing dependence on traditional energy sources, and achieving the goal of energy conservation and environmental protection. The scraper 212 is designed so that when the first threaded rod 220 rotates, due to the opposite thread directions at both ends, the two scrapers 212 will move simultaneously towards the middle or sides, thereby achieving automatic cleaning of the surface of the top cover 210. This effectively prevents the accumulation of dust and debris on the surface of the top cover 210, ensuring the power generation efficiency of the solar panel 211.

[0061] Specifically, a motor 290 is installed on the side wall of the energy storage cabinet 100. The output shaft of the motor 290 is coaxially connected to the first threaded rod 220, and the motor 290 enables electric control of the rotation of the first threaded rod 220. When it is necessary to open or close the top cover 210, simply start the motor 290, which drives the first threaded rod 220 to rotate, thereby realizing the corresponding action of the top cover 210.

[0062] In addition, please see Figure 4 and Figure 11 As shown, the upper section of the second threaded rod 230 is threadedly connected to a threaded block 240. T-shaped sliders 270 are slidably connected to both sides of the threaded block 240 at the top of the energy storage cabinet 100. A first support rod 250 is hinged between the T-shaped slider 270 and the threaded block 240. A second support rod 260 is hinged between the other end of the T-shaped slider 270 and the bottom end of the top cover plate 210. A rack 280 is welded and fixed to the bottom end of the T-shaped slider 270. When the second threaded rod 230 rotates, it will drive the threaded block 240 to move up and down. The threaded block 240 pushes the T-shaped slider 270 to slide at the top of the energy storage cabinet 100 through the first support rod 250. The T-shaped slider 270 then drives the top cover plate 210 to rotate through the second support rod 260, thereby realizing the opening and closing action of the top cover plate 210.

[0063] For details, please refer to Figure 9 As shown, a first bevel gear 221 is welded and fixed to both ends of the first threaded rod 220, and a second bevel gear 231 is welded and fixed to both ends of the second threaded rod 230. The closely spaced first bevel gear 221 and second bevel gear 231 mesh with each other. This meshing design of the first bevel gear 221 and second bevel gear 231 realizes the transmission connection between the first threaded rod 220 and the second threaded rod 230. When the motor 290 drives the first threaded rod 220 to rotate, the first bevel gear 221 will rotate accordingly, which in turn drives the meshed second bevel gear 231 to rotate, and the second bevel gear 231 in turn drives the second threaded rod 230 to rotate.

[0064] For further details, please refer to Figure 6 and Figure 8 As shown, the internal cooling device 400 includes several long rods 410 slidably connected in two groups inside the energy storage cabinet 100, a shielding cloth 420 connecting two adjacent long rods 410, a serpentine cooling pipe 440 installed at the bottom of the energy storage cabinet 100, and a third threaded rod 430 rotatably connected to both sides of the bottom of the energy storage cabinet 100. One end of the third threaded rod 430 is connected to the second threaded rod 230 for transmission. When the second threaded rod 230 rotates, it will drive the third threaded rod 430. The rod 430 rotates synchronously. When the third threaded rod 430 rotates, it drives the long rod 410 connected to it to slide. During the sliding process of the long rod 410, it drives the shielding cloth 420 to move, thereby exposing the serpentine cooling pipe 440 located at the bottom of the energy storage cabinet 100. The refrigerant supplied by the refrigeration unit 600 circulates inside the serpentine cooling pipe 440. During the flow of the refrigerant in the serpentine cooling pipe 440, it absorbs the heat inside the energy storage cabinet 100, achieving a cooling effect. Through the transmission connection between the third threaded rod 430 and the second threaded rod 230, the outdoor unit top opening device 200 and the indoor unit refrigeration device 400 can work together. When the outdoor unit top opening device 200 opens the top shield 210 to dissipate heat, the serpentine cooling pipe 440 is exposed simultaneously, accelerating the heat dissipation inside the cabinet.

[0065] For details, please refer to Figure 10 As shown, a third bevel gear 431 is welded and fixed to one end of the third threaded rod 430 near the side wall of the energy storage cabinet 100. The third bevel gear 431 meshes with the adjacent second bevel gear 231. The meshing design of the third bevel gear 431 and the second bevel gear 231 ensures stable transmission between the third threaded rod 430 and the second threaded rod 230.

[0066] It is worth noting that, please refer to Figure 6 As shown, a protrusion 411 is welded and fixed to the middle of the bottom of the long bar 410 located in the middle. The end of the third threaded bar 430 away from the side wall of the energy storage cabinet 100 is threadedly connected to the protrusion 411. The serpentine cooling pipe 440 is connected to the refrigerator 600. When the third threaded bar 430 rotates, the end away from the side wall of the energy storage cabinet 100 will be driven by the threaded engagement of the protrusion 411 to move the long bar 410 located in the middle horizontally along the direction of the preset slide rail inside the energy storage cabinet 100, thereby opening the cover cloth 420 and exposing the serpentine cooling pipe 440.

[0067] For further details, please refer to Figure 7As shown, the evaporator device 500 includes several battery brackets 510 installed inside the energy storage cabinet 100 and an evaporator 520 installed at the bottom center of the battery brackets 510. The evaporator 520 is connected to the refrigerator 600 through a delivery pipe 530. The evaporator 520 starts to work under the action of the refrigerant delivered by the refrigerator 600, and performs point-to-point cooling on the battery packs installed on the battery brackets 510. This can accurately eliminate local hot spots generated by the battery packs during operation, ensure that each battery can work stably in a suitable temperature environment, and effectively extend the service life of the batteries.

[0068] For details, please refer to Figure 7 As shown, a soft rubber pad is adhered and fixed to the inner wall of the battery bracket 510. A secondary bracket 511 is located at the center of the bottom of the battery bracket 510. The design of the soft rubber pad can buffer and absorb shock, reducing damage to the battery pack caused by vibration during battery pack installation and use, and further protecting the safety and stability of the battery pack. The secondary bracket 511 is used to install the evaporator 520, ensuring that the evaporator 520 can accurately perform point-to-point cooling operation on the battery pack.

[0069] For further details, please refer to Figure 5 As shown, the ventilation window 300 includes a window frame 310 welded and fixed to the side wall of the energy storage cabinet 100, and several louvers 320 rotatably connected to each other within the window frame 310. A first gear 330 is welded and fixed to the top of one of the louvers 320, and the first gear 330 meshes with a rack 280. A dustproof net 340 is installed inside the window frame 310. When the threaded block 240 moves up and down, the T-shaped slider 270 slides accordingly, and the rack 280 at the bottom of the T-shaped slider 270 moves accordingly. Because the rack 280 meshes with the first gear 330, it drives the connected louvers 320 to rotate, thus realizing the opening and closing action of the ventilation window 300. The dustproof net 340 installed inside the window frame 310 can further prevent dust and debris from entering, ensuring the cleanliness of the cabinet's internal environment.

[0070] In the energy storage system of this invention, the three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator allows operators to flexibly adjust the system based on the internal temperature of the energy storage cabinet 100. When the internal temperature of the energy storage cabinet 100 gradually rises and reaches a preset higher temperature threshold, the motor 290 is activated, driving the first threaded rod 220 to rotate. As the first threaded rod 220 rotates, the first bevel gears 221 at both ends drive the meshing second bevel gears 231 to rotate, thereby causing the second threaded rod 230 to rotate. The rotation of the second threaded rod 230 causes the threaded block 240 to move up and down. The threaded block 240 pushes the T-shaped slider 270 to slide via the first support rod 250. The T-shaped slider 270 then drives the top cover 210 to rotate via the second support rod 260, thus opening the top cover 210 for heat dissipation.

[0071] In addition, the up-and-down movement of the threaded block 240 causes the rack 280 at the bottom of the T-shaped slider 270 to move. The rack 280 drives the first gear 330 meshing with it to rotate, which in turn causes the louver 320 to rotate, thereby opening the ventilation window 300. This, together with the fan 110 and the ventilation hole 120, forms a good ventilation and heat dissipation effect.

[0072] On the other hand, the rotation of the second threaded rod 230 drives the third threaded rod 430 to rotate through the meshing of the third bevel gear 431 with the second bevel gear 231. The rotation of the third threaded rod 430 drives the long rod 410 to slide. The long rod 410 drives the shielding cloth 420 to move, exposing the serpentine cooling pipe 440 located at the bottom of the energy storage cabinet 100. The refrigerant is delivered to the serpentine cooling pipe 440 through the refrigeration unit 600. The refrigerant absorbs the heat inside the cabinet and accelerates the cooling.

[0073] As the temperature rises further, the refrigeration unit 600 delivers refrigerant to the evaporator 520 through the delivery pipe 530. The evaporator 520 starts up quickly under the action of the refrigerant, providing precise point-to-point cooling to the battery pack installed on the battery bracket 510.

[0074] Throughout the operation, the solar panel 211 at the top of the top shroud 210 continuously absorbs solar energy and converts it into electrical energy, providing auxiliary power for the energy storage system. Furthermore, when the first threaded rod 220 rotates, the two scrapers 212 simultaneously move towards the center or sides, automatically cleaning the surface of the top shroud 210 to prevent dust and debris accumulation and ensure the power generation efficiency of the solar panel 211. Simultaneously, when the humidity sensor inside the energy storage cabinet 100 detects excessive humidity, a built-in dehumidifier removes moisture from the cabinet.

[0075] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A three-stage refrigeration loop system for energy storage systems, comprising an energy storage cabinet, an outdoor unit top-opening device and a ventilation window installed on the top and side walls of the energy storage cabinet, and an indoor unit refrigeration device and an evaporator device installed inside the energy storage cabinet, characterized in that: A refrigeration unit is installed on one side of the energy storage cabinet, and the refrigeration unit is connected to the indoor refrigeration device and the evaporator device. The outdoor unit top-opening device includes a first threaded rod rotatably connected to the top of the energy storage cabinet, a top cover plate hinged to both sides of the first threaded rod, and a second threaded rod rotatably connected to two opposite side walls of the energy storage cabinet; the second threaded rod is drivenly connected to the first threaded rod. The internal cooling device includes several long rods slidably connected in two groups inside the energy storage cabinet, a shielding cloth connected between two adjacent long rods, a serpentine cooling pipe installed at the bottom inside the energy storage cabinet, and a third threaded rod rotatably connected to both sides of the bottom inside the energy storage cabinet; one end of the third threaded rod is drivenly connected to the second threaded rod. The evaporator device includes several battery brackets installed inside the energy storage cabinet and an evaporator installed at the bottom center of the battery brackets. The evaporator is connected to the refrigeration unit via a delivery pipe; A motor is installed on the side wall of the energy storage cabinet, and the output shaft of the motor is coaxially connected to the first threaded rod. The upper section of the second threaded rod is threadedly connected to a threaded block. The top of the energy storage cabinet is slidably connected to both sides of the threaded block. A first support rod is hinged between the T-shaped slider and the threaded block. A second support rod is hinged between the other end of the T-shaped slider and the bottom end of the top cover plate. A rack is welded and fixed to the bottom end of the T-shaped slider. The ventilation window includes a window frame welded and fixed to the side wall of the energy storage cabinet and several louvers rotatably connected to the window frame and interconnected with each other. A first gear is welded and fixed to the top of one of the louvers, and the first gear meshes with the rack. A dustproof net is installed on the inner side of the window frame. A protrusion is welded and fixed at the bottom center of the long bar located in the middle. The end of the third threaded rod away from the side wall of the energy storage cabinet is threadedly connected to the protrusion nearby. The serpentine cooling pipe is connected to the refrigeration unit.

2. The three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator for energy storage system according to claim 1, characterized in that: A solar panel is installed at the top of the top cover, and scrapers are slidably connected to both ends of the top cover. The scraper is threaded to the end of the first threaded rod near the first threaded rod, and the threads at both ends of the first threaded rod are in opposite directions.

3. The three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator for energy storage system according to claim 2, characterized in that: The first threaded rod has a first bevel gear welded to both ends, and the second threaded rod has a second bevel gear welded to both ends. The first bevel gear and the second bevel gear mesh with each other.

4. The three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator for energy storage system according to claim 3, characterized in that: A third bevel gear is welded and fixed to one end of the third threaded rod near the side wall of the energy storage cabinet, and the third bevel gear meshes with the adjacent second bevel gear.

5. The three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator for energy storage system according to claim 4, characterized in that: A soft rubber pad is adhered and fixed to the inner wall of the battery bracket, and a secondary bracket is provided at the middle of the bottom end of the battery bracket.

6. The three-stage refrigeration loop system of outdoor unit-indoor unit-evaporator for energy storage system according to claim 5, characterized in that: Several fans are installed on the top of the energy storage cabinet, and several ventilation holes are opened on the side wall of the energy storage cabinet at the corresponding positions of the ventilation windows.

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