Energy storage cabinet and sponge electric power method applied to power grid tail end to adjust power output

Abstract

The invention relates to the technical field of energy storage charging and discharging, and mainly discloses an energy storage cabinet and a sponge electric power method applied to the tail end of a power grid to adjust power output of the energy storage cabinet. The energy storage cabinet comprises a cabinet body, a cabinet base, a top cover, a base and a cabinet door, a back plate is fixedly installed on the side, away from the cabinet door, of the cabinet body, and side plates are symmetrically installed on the two sides, located between the cabinet door and the back plate, of the cabinet body; a plug bush is fixedly installed on the side plate, a charging gun is inserted in the plug bush, a rain shielding mechanism is fixedly installed on the side face, away from the cabinet body, of the back plate, an upper cavity and a lower cavity are formed in the base, and a fan-shaped hole is formed in the side wall, facing the cabinet door, of the base. In the process of moving the charging gun, the charging cable can move in the base through the cable pipe, a user can pull the charging cable more conveniently, folding of the charging cable during charging is avoided, the charging gun can be installed regardless of the left side and the right side, and convenience is provided for the user.

Description

Technical Field

[0001] This invention relates to the field of energy storage charging and discharging technology, and more specifically, to an energy storage cabinet and its sponge power method for regulating power output at the end of the power grid. Background Technology

[0002] When charging new energy vehicles, current technology uses fuel cell stacks for charging. Taking an eight-car charging station as an example, a typical setup uses a 480kW fuel cell stack with four separate charging piles, each equipped with two charging guns, each with a power of 60kW. With all eight charging stations having 60kW charging guns, the fuel cell stack power is sufficient to meet the charging power requirements of the vehicles. However, when there are one or more high-power charging users, with one or more charging guns exceeding 60kW (e.g., two charging guns with a power of 200kW), the fuel cell stack power cannot meet the charging power requirements of the remaining vehicles, leading to a decrease in charging power for those vehicles.

[0003] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0004] The purpose of this invention is to provide an energy storage cabinet and a sponge power method for regulating power output at the end of the power grid, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An energy storage cabinet includes a cabinet body, a cabinet base fixedly installed at the bottom of the cabinet body, a top cover fixedly installed at the top end of the cabinet body, a base provided at the bottom of the cabinet base, the cabinet base fixedly installed on the base, a cabinet door installed on one side of the cabinet body, a back panel fixedly installed on the side of the cabinet body away from the cabinet door, side panels symmetrically installed on both sides of the cabinet body between the cabinet door and the back panel, insert sleeves fixedly installed on the side panels, and charging guns inserted into the insert sleeves, and a rainproof mechanism fixedly installed on the side of the back panel away from the cabinet body, with the top of the rainproof mechanism facing the two sides of the side panel. The base is positioned directly above the charging gun. It has an upper cavity and a lower cavity inside. Two fan-shaped holes are located on the side wall of the base facing the cabinet door, each communicating with the upper and lower cavities respectively. Cable guide components are installed in both the upper and lower cavities. One end of the cable guide component, away from the vertical center line of the base, passes through the fan-shaped hole and is slidably connected to it. The top of the base has a first opening communicating with the bottom of the cabinet. The interior of the base also has openings connecting the upper and lower cavities. The second opening of the cavity includes a rain-proof mechanism comprising an assembly base fixedly mounted on the outer wall of the back panel, on which a cylinder is fixedly mounted. A horizontally arranged support bar is also fixedly mounted on the upper part of the outer wall of the back panel. A vertical plate is fixedly mounted on the top of the support bar. A fixing frame is fixedly mounted on the side of the vertical plate away from the top cover. A vertically arranged sliding groove is formed at the end of the fixing frame away from the vertical plate. A strip-shaped block is slidably mounted within the sliding groove. The bottom end of the strip-shaped block is connected to the output shaft end of the cylinder. The two ends of the strip-shaped block facing the top cover are fixedly mounted... The device is equipped with a crossbar, with locking blocks fixedly installed at both ends of the crossbar. A traction rope is fixedly installed between two locking blocks located on the same side of the strip block. An extension plate is integrally provided on the side of the vertical plate facing the top cover, and an assembly block is fixedly installed on the extension plate. A rotating shaft is rotatably installed inside the assembly block. The end of the rotating shaft facing the vertical plate passes through the vertical plate. A rotating wheel is fixedly installed at the end of the rotating shaft passing through the vertical plate. The traction rope is wrapped around the outside of the rotating wheel. A rainproof component is fixedly installed at the end of the rotating shaft away from the rotating wheel.

[0006] Furthermore, a panel is fixedly installed on the top side of the cabinet door away from the cabinet body. The panel is embedded in the cabinet door, and a display screen is installed on the panel. An indicator light is also installed on the panel above the display screen.

[0007] Furthermore, a connecting shell is fixedly installed at the bottom of the top cover. The bottom end of the connecting shell is sealed and fixedly installed on the top of the cabinet. A cooling fan is fixedly installed on one side of the bottom of the connecting shell. An air vent facing the cooling fan is opened at the bottom end of the connecting shell. A heat dissipation hole is opened at the bottom of the top cover on the outside of the connecting shell.

[0008] Furthermore, the cable guide assembly includes a cable conduit, which is horizontally arranged. A fixing block is fixedly installed on the outer wall of one end of the cable conduit located inside the fan-shaped hole. A protruding post is fixedly installed at the center of the end of the fixing block away from the cable conduit. An arc-shaped groove is formed on the inner wall of the fan-shaped hole along its length direction, and the protruding post is slidably disposed in the arc-shaped groove.

[0009] Furthermore, a first annular groove is formed on the bottom wall of the lower cavity, an annular plate is fixedly installed on the bottom wall of the upper cavity, a second annular groove is formed on the top of the annular plate, a fixing block is also fixedly installed on the bottom of the outer wall of the end of the conduit located inside the lower cavity and / or the upper cavity, a protruding post is fixedly installed on the bottom of the fixing block, and the protruding post located inside the lower cavity is slidably disposed in the first annular groove, the protruding post located inside the upper cavity is slidably disposed in the second annular groove, and a wire passage hole is formed on the side wall of the cabinet base.

[0010] Furthermore, the vertical plate is also provided with a strip-shaped hole, which is oriented towards the connecting shell.

[0011] Furthermore, a third annular groove is provided on the outer side of the wheel, the traction rope is wound in the third annular groove, and a positioning and limiting pin for positioning the traction rope is also fixedly installed on the outside of the wheel.

[0012] Furthermore, the rainproof assembly includes a rainproof plate, and an embedding groove is provided on the bottom surface of the rainproof plate near the rotating shaft. A connecting plate is fixedly installed in the embedding groove. A fixing sleeve is integrally provided on the end of the connecting plate away from the rainproof plate. The fixing sleeve is fixedly installed on the end of the rotating shaft. When the rainproof plate is located directly above the charging gun, a groove is also provided on the bottom end surface, and a photovoltaic panel is installed in the groove.

[0013] Furthermore, a connecting strip is fixedly installed at the bottom end of the strip block, and a threaded hole is opened at the end of the connecting strip away from the strip block. The output shaft end of the cylinder is fixedly installed in the threaded hole.

[0014] A sponge power method using the above-mentioned energy storage cabinet to regulate power output at the end of the power grid is characterized by the following main steps; S1. Obtain the status of the inverter module and charging module in the energy storage cabinet, and verify the status of the inverter module and charging module; S2. Monitor the real-time charging power P of the charging module. c Determine the threshold allowable power P0 and judge the real-time charging power P. c Is it greater than the gate-permitted power P0? S4, if P in S2 c If -P0>0, then the inverter is controlled to discharge, and the discharge power is P. cThe difference between -P0 and the initial state of charge (SOC) of the energy storage module is determined, and it is also determined whether the SOC of the energy storage module is greater than 10% during this process. S5. If SOC > 10% in S4, control the inverter to continue discharging; if SOC ≤ 10%, limit the real-time charging power, making P... c =P0; S6. If P in S3 c -P0≤0, determine whether the initial state of charge (SOC) of the energy storage module is greater than 90% during this process; S7. If SOC > 90% in S6, the real-time charging power of the inverter is 0. If SOC ≤ 90%, the inverter charging power is controlled to be P0 - P. c .

[0015] Compared with the prior art, the present invention has the following beneficial effects: The base of this invention allows the charging cable to be routed through a fan-shaped hole on its side wall and connected to the charging gun. The base is also divided into an upper cavity and a lower cavity, and a conduit is installed inside. This allows the charging cable to move through the conduit inside the base while the charging gun is being moved, making it easier for the user to pull the charging cable and preventing the cable from folding during charging. The charging gun can also be installed regardless of left or right, providing convenience for the user.

[0016] The rain-shielding mechanism of this invention can be flipped and adjusted according to needs. It can protect the charging gun from rain on rainy days and provide shade for the top cover on sunny days. Moreover, since a photovoltaic panel is also installed on one side of the rain-shielding panel, it can provide photovoltaic charging for the energy storage module inside the cabinet while providing shade for the top cover. In addition, the photovoltaic panel can also be flipped to prevent it from getting wet in the rain. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an energy storage cabinet according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the cabinet in the energy storage cabinet according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the cabinet door in the energy storage cabinet according to an embodiment of the present invention; Figure 4This is a schematic diagram of the side panel in the energy storage cabinet according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the back panel in the energy storage cabinet according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the top cover in the energy storage cabinet according to an embodiment of the present invention; Figure 7 This is an assembly diagram of the cabinet base and the base in the energy storage cabinet according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the base in the energy storage cabinet according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the wiring assembly in the energy storage cabinet according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the internal structure of the base in the energy storage cabinet according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the external structure of the back panel in the energy storage cabinet according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the rainproof mechanism in the energy storage cabinet according to an embodiment of the present invention; Figure 13 This is a schematic diagram of one side structure of the vertical plate in the energy storage cabinet according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the other side of the vertical plate in the energy storage cabinet according to an embodiment of the present invention; Figure 15 This is a schematic diagram of the rainproof assembly in the energy storage cabinet according to an embodiment of the present invention; Figure 16 This is a schematic diagram of the structure of the rain shield in the energy storage cabinet according to an embodiment of the present invention; Figure 17 This is a schematic diagram of the structure of the strip block in the energy storage cabinet according to an embodiment of the present invention; Figure 18 This is a flowchart of a sponge power method for applying an energy storage cabinet to the end of a power grid to regulate power output, according to an embodiment of the present invention. Figure 19 This is a system block diagram of a sponge power method for applying an energy storage cabinet to the end of a power grid to regulate power output, according to an embodiment of the present invention.

[0019] Figure label: 1. Cabinet body; 2. Cabinet base; 3. Top cover; 4. Base; 5. Cabinet door; 6. Side panel; 7. Back panel; 8. Front panel; 9. Display screen; 10. Indicator light; 11. Socket; 12. Charging gun; 13. Rainproof mechanism; 14. Connecting shell; 15. Cooling fan; 16. Ventilation hole; 17. Upper cavity; 18. Lower cavity; 19. Fan-shaped hole; 20. Cable guide assembly; 201. Cable conduit; 202. Fixing block; 203. Protruding post; 21. First through-hole; 22. Second through-hole; 23. Arc groove; 24. First annular groove; 25. Annular plate; 26. Second annular groove; 27. Through hole; 28. Assembly base; 29. ​​Cylinder; 30. Support crossbar; 31. Vertical plate; 32. Strip hole; 33. Fixing bracket; 34. Slide groove; 35. Strip block; 36. Crossbar; 37. Locking block; 38. Extension plate; 39. Assembly block; 40. Shaft; 41. Wheel; 42. Traction rope; 43. Limiting pin; 44. Rainproof assembly; 45. Rainproof plate; 46. Photovoltaic panel; 47. Connecting plate; 48. Fixing sleeve; 49. Groove; 50. Embedding groove; 51. Connecting strip; 52. Threaded hole. Detailed Implementation

[0020] The invention will now be further described with reference to the accompanying drawings and specific embodiments: Example 1: Please refer to Figure 1-6 According to an embodiment of the present invention, an energy storage cabinet includes a cabinet body 1. A cabinet base 2 is fixedly installed at the bottom of the cabinet body 1, and a top cover 3 is fixedly installed at the top end of the cabinet body 1. A base 4 is provided at the bottom of the cabinet base 2, and the cabinet base 2 is fixedly installed on the base 4. A cabinet door 5 is installed on one side of the cabinet body 1. A back panel 7 is fixedly installed on the side of the cabinet body 1 away from the cabinet door 5. Side panels 6 are symmetrically installed on both sides of the cabinet body 1 between the cabinet door 5 and the back panel 7. A plug sleeve 11 is fixedly installed on the side panel 6, and a charging gun 12 is inserted into the plug sleeve 11. A rainproof mechanism 13 is fixedly installed on the side of the back panel 7 away from the cabinet body 1. The top of the rainproof mechanism 13 is located on both sides facing the side panel 6 directly above the charging gun 12. The rainproof mechanism 13 can provide a certain rainproof effect for the charging gun 12, preventing the charging gun 12 from being damaged by rain in rainy weather.

[0021] To facilitate observation of the charging status, in this embodiment, a panel 8 is fixedly installed on the top side of the cabinet door 5 away from the cabinet body 1. The panel 8 is embedded in the cabinet door 5, and a display screen 9 is installed on the panel 8. An indicator light 10 is also installed on the panel 8 above the display screen 9. To enable heat dissipation inside the cabinet body 1, in this embodiment, a connecting shell 14 is fixedly installed at the bottom of the top cover 3. The bottom end of the connecting shell 14 is sealed and fixedly installed on the top of the cabinet body 1. A cooling fan 15 is fixedly installed on one side of the bottom of the connecting shell 14. An air vent (not shown) is opened at the bottom end of the connecting shell 14 facing the cooling fan 15. Several heat dissipation holes 16 are opened at the bottom of the top cover 3 on the outside of the connecting shell 14.

[0022] Please see Figure 7-10 In order to enable the charging gun 12 to be switched between the left and right sides according to the user's needs during actual use, in this embodiment, the base 4 has an upper cavity 17 and a lower cavity 18 inside. The side wall of the base 4 facing the cabinet door 5 has a fan-shaped hole 19. There are two fan-shaped holes 19, and the two fan-shaped holes 19 are respectively connected to the upper cavity 17 and the lower cavity 18. Both the upper cavity 17 and the lower cavity 18 are equipped with wire passing components 20. The end of the wire passing component 20 away from the vertical center line of the base 4 passes through the fan-shaped hole 19, and the wire passing component 20 is slidably connected to the fan-shaped hole 19. The top of the base 4 has a first passage 21 that communicates with the bottom of the cabinet base 2. The interior of the base 4 also has a second passage 22 that connects the upper cavity 17 and the lower cavity 18. The charging cable inside the cabinet 1 is fed into the upper cavity 17 through the first port 21, and then into the lower cavity 18 through the second port 22. After that, it passes through the cable guide assembly 20 in the upper cavity 17 and the lower cavity 18 respectively, through the fan-shaped hole 19, and finally connects to the charging gun 12. Because the cable guide assembly 20 can slide in the fan-shaped hole 19, when the user holds the charging gun 12 from one side of the cabinet 1 to the other side, the cable guide assembly 20 can slide in the fan-shaped hole 19, so that the charging gun 12 can be used on different sides of the cabinet 1. This makes it convenient for users to choose different charging guns 12 according to the location of their vehicle's charging port. After using the charging gun 12, it can be inserted into any empty socket 11. Moreover, because the cable guide assembly 20 can adjust the position of the charging cable, there is no need to worry about the cable being pulled or bent during the charging process.

[0023] To enable the cable guide assembly 20 to stably adjust the movement of the charging cable, in this embodiment, the cable guide assembly 20 includes a cable tube 201, which is horizontally positioned. A fixing block 202 is fixedly installed on the outer wall of one end of the cable tube 201 located within the fan-shaped hole 19. A protruding post 203 is fixedly installed at the center of the end of the fixing block 202 away from the cable tube 201. An arc-shaped groove 23 is formed on the inner wall of the fan-shaped hole 19 along its length, and the protruding post 203 slides within the arc-shaped groove 23. The charging cable can pass through the cable tube 201 to exit into the base 4 and connect to the charging gun 12. When the charging gun 12 pulls the charging cable, the cable tube 201 can slide within the arc-shaped groove 23 on the inner wall of the fan-shaped hole 19 via the protruding post 203 at the end of the fixing block 202, thereby changing the position of the charging cable extending from the bottom of the base 4.

[0024] To make the conduit 201 more stable when swinging, in this embodiment, a first annular groove 24 is provided on the bottom wall of the lower cavity 18, an annular plate 25 is fixedly installed on the bottom wall of the upper cavity 17, and a second annular groove 26 is provided on the top of the annular plate 25. A fixing block 202 is also fixedly installed on the bottom of the outer wall of one end of the conduit 201 inside the lower cavity 18 and / or the upper cavity 17. A protruding post 203 is fixedly installed on the bottom of the fixing block 202, and the protruding post 203 inside the lower cavity 18 is slidably disposed in the first annular groove 24, and the protruding post 203 inside the upper cavity 17 is slidably disposed in the second annular groove 26. In order to facilitate the delivery of external wire harnesses into the cabinet 1, a wire-passing hole 27 is provided on the side wall of the cabinet base 2.

[0025] Through the above-described solution of the present invention, the base 4 provided by the present invention can lead the charging cable out from the fan-shaped hole 19 opened on its side wall and connect it to the charging gun 12. The interior of the base 4 is opened into an upper cavity 17 and a lower cavity 18, and a conduit 201 is installed. Thus, during the movement of the charging gun 12, the charging cable can also move inside the base 4 through the conduit 201, which makes it more convenient for the user to pull the charging cable and avoids the folding of the charging cable during charging. Moreover, the charging gun 12 can be installed regardless of left or right, which provides convenience for the user.

[0026] Example 2: Please refer to Figure 11-17In Embodiment 1, regardless of how the charging gun 12 is inserted into the sleeves 11 on different side plates 6, the rainproof mechanism 13 at its top must be directly above it. However, in sunny weather, rainproofing is unnecessary. To improve the effectiveness of the rainproof mechanism 13, in this embodiment, the rainproof mechanism 13 includes a mounting base 28 fixedly installed on the outer wall of the back plate 7. A cylinder 29 is fixedly installed on the mounting base 28. A horizontally arranged support bar 30 is also fixedly installed on the upper part of the outer wall of the back plate 7. A vertical plate 31 is fixedly installed on the top of the support bar 30. The vertical plate 31 also has a strip hole 32 facing the connecting shell 14. A fixing bracket 33 is fixedly installed on the side of the vertical plate 31 away from the top cover 3. A vertically arranged sliding groove 34 is opened at the end of the fixing bracket 33 away from the vertical plate 31. A strip block 35 is slidably installed, with its bottom end connected to the output shaft end of the cylinder 29. A crossbar 36 is fixedly installed at both ends of the strip block 35 facing the top cover 3, and locking blocks 37 are fixedly installed at both ends of the crossbar 36. A traction rope 42 is fixedly installed between the two locking blocks 37 on the same side of the strip block 35. An extension plate 38 is integrally provided on the side of the vertical plate 31 facing the top cover 3, located above the top cover 3. An assembly block 39 is fixedly installed on the extension plate 38, and a rotating shaft 40 is rotatably installed inside the assembly block 39. One end of the rotating shaft 40 facing the vertical plate 31 penetrates the vertical plate 31, and a rotating wheel 41 is fixedly installed at the end of the rotating shaft 40 penetrating the vertical plate 31. The traction rope 42 is wound around the outside of the rotating wheel 41. A rainproof component 44 is fixedly installed at the end of the rotating shaft 40 away from the rotating wheel 41.

[0027] The cylinder 29 drives the strip block 35 to move up and down. When the strip block 35 moves, it can drive the locking block 37 to move synchronously through the crossbar 36. At this time, the locking block 37 can rotate the wound wheel 41 through the traction rope 42. The rotating wheel 41 then drives the rotating shaft 40 to rotate synchronously, so that the rotating shaft 40 can drive the rainproof component 44 to flip. According to practical needs, the rainproof component 44 can be flipped to the top of the charging gun 12 for rain protection, or flipped to the top of the top cover 3 for sun protection.

[0028] In order to enable the traction rope 42 to stably drive the rotating wheel 41 to rotate, in this embodiment, a third annular groove (not shown) is provided on the outer side of the rotating wheel 41, the traction rope 42 is wound in the third annular groove, and a limit pin 43 is fixedly installed on the outside of the rotating wheel 41. The limit pin 43 is used to position the traction rope 42 on the rotating wheel 41.

[0029] To ensure the rainproof component 44 provides effective rain and sun protection, in this embodiment, the rainproof component 44 includes a rainproof plate 45. A mounting groove 50 is provided on the bottom surface of the rainproof plate 45 near the rotating shaft 40. A connecting plate 47 is fixedly installed within the mounting groove 50. A fixing sleeve 48 is integrally provided at the end of the connecting plate 47 away from the rainproof plate 45. The fixing sleeve 48 is fixedly installed at the end of the rotating shaft 40. When the rotating shaft 40 rotates, it drives the fixing sleeve 48 to rotate synchronously. At this time, the fixing sleeve 48, through the connecting plate 47, drives the rainproof plate 45 to flip, placing it directly above the charging gun 12 or directly above the top cover 3, thus providing rain protection for the charging gun 12 or the top cover 3. To further improve the practicality of the rainproof plate 45, in this embodiment, a groove 49 is also provided on the bottom end face of the rainproof plate 45 when it is directly above the charging gun 12. A photovoltaic panel 46 is installed within the groove 49. When the rain shield 45 is above the top cover 3, it should be sunny, and the photovoltaic panel 46 should be facing upwards, so it can achieve the effect of photovoltaic charging and provide photovoltaic charging for the energy storage module inside the cabinet 1. When the rain shield 45 is flipped over to be above the charging gun 12, it is raining, and the photovoltaic panel 46 should be facing downwards. While the rain shield 45 protects the charging gun 12 from rain, it can also prevent the photovoltaic panel 46 from getting wet.

[0030] In order to enable the strip block 35 to be stably connected to the output shaft of the cylinder 29, in this embodiment, a connecting strip 51 is fixedly installed at the bottom end of the strip block 35, and a threaded hole 52 is opened at the end of the connecting strip 51 away from the strip block 35, and the output shaft end of the cylinder 29 is fixedly installed in the threaded hole 52.

[0031] Through the above-described solution of the present invention, the rainproof mechanism 13 provided by the present invention can rotate and adjust the position of the rainproof plate 45 according to the needs. It can not only protect the charging gun 12 from rain, but also provide shade for the top cover 3 on sunny days. Moreover, since a photovoltaic panel 46 is also installed on one side of the rainproof plate 45, it can provide photovoltaic charging for the energy storage module inside the cabinet 1 while providing shade for the top cover 3. In addition, the photovoltaic panel 46 can also be rotated in rainy days to prevent it from getting wet.

[0032] Example 3: Please refer to Figure 1 - For Embodiments 1 and 2, the present invention also provides a sponge power method based on the above-mentioned energy storage cabinet applied to the end of the power grid to regulate power output, which mainly includes the following steps: S1. Obtain the status of the inverter module and charging module in the energy storage cabinet, and verify the status of the inverter module and charging module; S2. Monitor the real-time charging power P of the charging module. c Determine the threshold allowable power P0 and judge the real-time charging power P. cIs it greater than the gate-permitted power P0? S4, if P in S2 c If -P0>0, then the inverter is controlled to discharge, and the discharge power is P. c The difference between -P0 and the initial state of charge (SOC) of the energy storage module is determined, and it is also determined whether the SOC of the energy storage module is greater than 10% during this process. S5. If SOC > 10% in S4, control the inverter to continue discharging; if SOC ≤ 10%, limit the real-time charging power, making P... c =P0; S6. If P in S3 c -P0≤0, determine whether the initial state of charge (SOC) of the energy storage module is greater than 90% during this process; S7. If SOC > 90% in S6, the real-time charging power of the inverter is 0. If SOC ≤ 90%, the inverter charging power is controlled to be P0 - P. c .

[0033] Conventional power configuration methods require a power capacity with a rated power of at least Pmax to meet the normal operation of the load at maximum output. However, by deploying this energy storage cabinet on the power load side at the end of the grid and installing an energy storage system and its intelligent control system inside, the load status and available power capacity can be tracked and calculated in real time. Only a power capacity with a rated power (gate-permitted power) of P0 is required to meet normal use.

[0034] When the electrical load exceeds the power output control line, the energy storage system automatically detects the fluctuation and uses an intelligent algorithm to match the energy storage discharge output, ensuring that the power output is lower than the power control line and does not exceed the frequency limit. When the electrical load is lower than the power output control line, the energy storage system intelligently matches the charging process based on the load idle margin and state of charge, and actually replenishes the power while ensuring that the overall power output does not exceed the control line.

[0035] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below.

[0036] In practical applications, the base 4 of this invention allows the charging cable to be led out through the fan-shaped hole 19 on its side wall and connected to the charging gun 12. The interior of the base 4 is divided into an upper cavity 17 and a lower cavity 18, and a conduit 201 is installed therein. Thus, during the movement of the charging gun 12, the charging cable can also move through the conduit 201 inside the base 4, making it easier for the user to pull the charging cable and avoiding folding of the charging cable during charging. Moreover, the charging gun 12 can be installed regardless of left or right, providing convenience for the user.

[0037] The rain-shielding mechanism 13 of this invention can be flipped and adjusted according to needs, so as to protect the charging gun 12 from rain and provide shade for the top cover 3 on sunny days. Moreover, since a photovoltaic panel 46 is also installed on one side of the rain-shielding panel 45, it can provide photovoltaic charging for the energy storage module inside the cabinet 1 while providing shade for the top cover 3. In addition, the photovoltaic panel 46 can also be flipped in the rain to prevent it from getting wet.

[0038] Furthermore, this application also proposes a power configuration technology based on sponge power principles and aimed at virtual capacity expansion, achieved through intelligent and flexible interactive energy management of energy sources, grids, loads, and storage in the construction and operation of new charging infrastructure, comprising an AC-coupled system of energy storage, charging, photovoltaics, and power distribution. Please refer to [reference needed]. Figure 19 Specifically, it includes energy storage and charging systems, photovoltaic systems, power distribution systems, energy management systems, and auxiliary systems. The energy storage and charging system mainly includes energy storage converters, charging converters, charging terminal equipment, battery arrays, AC power distribution switches, and other equipment, as well as related auxiliary equipment such as battery thermal management and fire protection systems. The photovoltaic system mainly includes photovoltaic inverters, photovoltaic arrays, AC power distribution switches, and other equipment. The power distribution system mainly includes distribution transformers, AC power distribution switches, and other equipment. The energy management system includes metering equipment, energy management controllers and their control power supplies and communication network equipment. The auxiliary system includes cooling systems and other auxiliary equipment. The ratio of the maximum charging power to the distributed capacity of the new charging infrastructure is defined as the virtual capacity expansion gain coefficient. Preferably, the virtual capacity expansion gain coefficient is not less than 2.

[0039] The calculation method for the virtual capacity expansion gain coefficient of the new charging infrastructure power supply is as follows: (1-1) In the formula: The virtual capacity expansion gain coefficient for new charging infrastructure power supplies shall not be less than 2; The maximum total charging power for the new charging facilities; This refers to the power distribution capacity.

[0040] The maximum total charging power of new charging infrastructure should be determined according to local conditions, and the calculation method is as follows: (1-2) In the formula: It refers to the collection of charging loads in new charging infrastructure; The simultaneous charging coefficient for new charging infrastructure is generally 0.8; The charging power is preset for each parking space based on the actual situation.

[0041] The sum of the power distribution capacity and the total rated discharge power of the new charging infrastructure should not be less than the total maximum charging power. (1-3) In the formula: The rated power of a specific energy storage discharge in a new type of charging facility; The maximum power that a single charging pile or integrated energy storage and charging device in a new type of charging facility can use to charge a car. E represents the collection of energy storage in new charging infrastructure.

[0042] The total energy storage capacity of new charging infrastructure should be greater than or equal to the power distribution capacity for one hour, calculated as follows: (1-4) In the formula: This refers to the capacity of a single energy storage battery in a new type of charging facility.

[0043] h represents one hour.

[0044] The calculation method for the maximum reverse support power of the new charging infrastructure to the power grid is as follows: (1-5) In the formula: Maximum reverse support power for new charging infrastructure; The installed capacity of a single photovoltaic unit in a new type of charging facility; G represents the collection of photovoltaics in new charging infrastructure.

[0045] The calculation method for the maximum reverse support power of energy storage in new charging infrastructure to the power grid and its duration is as follows: (1-6) (1-7) In the formula: Maximum reverse support power for energy storage in new charging infrastructure; The duration for which energy storage for new charging infrastructure maintains maximum reverse support power.

[0046] The calculation method for the photovoltaic absorption capacity of new charging infrastructure is as follows: (1-8) In the formula: The photovoltaic absorption capacity of the new charging infrastructure within time T (expressed as a percentage). Photovoltaic power absorption capacity of new charging facilities at time t; The actual output power of the photovoltaic system at time t represents the new type of charging facility.

[0047] In one embodiment, the virtual capacity expansion gain factor is first determined and set to 2. If there is a distribution transformer with a distribution capacity of 630kVA, the total maximum charging power of the new charging facility, the total rated power of energy storage, the total energy storage capacity, the maximum reverse support power of the new charging infrastructure to the power grid, and the maximum reverse support power of the energy storage of the new charging infrastructure to the power grid can be calculated respectively.

[0048] The calculation method for the virtual capacity expansion gain coefficient of the new charging infrastructure power supply:

[0049] In the formula: τ The virtual capacity expansion gain coefficient for new charging infrastructure power supplies shall not be less than 2; S ch The maximum total charging power for the new charging facilities; S T This refers to the power distribution capacity.

[0050] Among them, virtual capacity enhancement gain coefficient τ The power distribution capacity is 2. S T It has a capacity of 630 kVA.

[0051] Then, using formula (1), we can derive: Calculation S ch The new charging facility has a total maximum charging power of 1260kW.

[0052] The sum of the power distribution capacity and the total rated discharge power of the new charging infrastructure should not be less than the total maximum charging power. In the formula: The rated power of a specific energy storage discharge in a new type of charging facility; The maximum power that a single charging pile or integrated energy storage and charging device in a new type of charging facility can use to charge a car. E It refers to the collection of energy storage in new charging infrastructure.

[0053] Among them, power distribution capacity S T It is 630kVA. The total maximum charging power is 1260kW.

[0054] The result of transforming formula (2) is... The total rated power of energy storage should be greater than .

[0055] .

[0056] Calculate the total energy storage capacity using formula (3): (3) In the formula: C e This refers to the capacity of a single energy storage battery in a new type of charging facility.

[0057] h To indicate one hour.

[0058] By transforming formula (3), the total energy storage capacity should be greater than or equal to 630kWh.

[0059] The calculation method for the maximum reverse support power of the new charging infrastructure to the power grid is as follows: In the formula: Maximum reverse support power for new charging infrastructure; The installed capacity of a single photovoltaic unit in a new type of charging facility; G It is a collection of photovoltaics in new charging infrastructure.

[0060] The maximum reverse support power of the new charging infrastructure to the power grid is: total photovoltaic power + total energy storage power (and is always less than or equal to 630kW).

[0061] The calculation method for the maximum reverse support power of energy storage in new charging infrastructure to the power grid and its duration is as follows: (5) (6) In the formula: Maximum reverse support power for energy storage in new charging infrastructure; The duration for which energy storage for new charging infrastructure maintains maximum reverse support power.

[0062] The maximum reverse support power of the new charging infrastructure energy storage to the grid is: the total discharge power of energy storage, and the support time is: energy storage capacity 630kWh / maximum reverse support power of energy storage.

[0063] In another embodiment, based on the actual number of parking spaces and the preset capacity, the total maximum charging power of the new charging infrastructure is determined to be 2200kW, and the virtual capacity expansion gain coefficient is 2. The total maximum charging power of the new charging infrastructure, the total rated power of energy storage, the maximum reverse support power of the new charging infrastructure to the grid, and the maximum reverse support power of the energy storage of the new charging infrastructure to the grid can be calculated respectively.

[0064] Known S ch The new charging facility has a total maximum charging power of 2200kW and a virtual capacity expansion gain coefficient. τ The value is 2.

[0065] In the formula: τ The virtual capacity expansion gain coefficient for new charging infrastructure power supplies shall not be less than 2; S ch The maximum total charging power for the new charging facilities; S T This refers to the power distribution capacity.

[0066] Transform formula (1) to obtain the following formula, and find that the distribution transformer at this time needs to be greater than or equal to 1100kVA, so take 1250kVA.

[0067] The sum of the power distribution capacity and the total rated discharge power of the new charging infrastructure should not be less than the total maximum charging power. In the formula: The rated power of a specific energy storage discharge in a new type of charging facility; The maximum power that a single charging pile or integrated energy storage and charging device in a new type of charging facility can use to charge a car. E It refers to the collection of energy storage in new charging infrastructure.

[0068] The result of transforming formula (2) is... The total rated power of energy storage should be greater than 950kW.

[0069] Calculate the total energy storage capacity using formula (3): (3) In the formula: C e This refers to the capacity of a single energy storage battery in a new type of charging facility.

[0070] h represents one hour.

[0071] Therefore, the total energy storage capacity should be greater than or equal to 1250kWh.

[0072] The calculation method for the maximum reverse support power of the new charging infrastructure to the power grid is as follows: In the formula: Maximum reverse support power for new charging infrastructure; The installed capacity of a single photovoltaic unit in a new type of charging facility; G It is a collection of photovoltaics in new charging infrastructure.

[0073] The maximum reverse support power of the new charging infrastructure to the power grid is: total photovoltaic power + total energy storage power (and is always less than or equal to 1250kW).

[0074] The calculation method for the maximum reverse support power of energy storage in new charging infrastructure to the power grid and its duration is as follows: (5) (6) In the formula: Maximum reverse support power for energy storage in new charging infrastructure; The duration for which energy storage for new charging infrastructure maintains maximum reverse support power.

[0075] The maximum reverse support power of the new charging infrastructure energy storage to the grid is: the total energy storage power that can be released, and the support time is: energy storage capacity 1250kWh / maximum reverse support power of energy storage.

[0076] It should be noted that the energy storage battery capacity should be no less than one hour's worth of power distribution capacity, and it should have the ability to support and regulate at least 50% of the upper-level power grid's distribution capacity, assisting in the formation of main-distribution-micro-grid coordination, without affecting the charging power of charging users. It should ensure an absorption rate of over 90% even when the photovoltaic power installed is less than the distribution capacity. The self-peak shaving and self-balancing capabilities of the new charging infrastructure should be improved, with a self-regulation capability of no less than 50% of the peak power of the new charging infrastructure. For existing charging stations undergoing service capacity upgrades, the original power distribution system should not be altered if the upgraded service capacity is no more than three times greater.

[0077] This application enables virtual capacity expansion of power sources, improves the ratio of maximum charging power to distribution capacity of new charging infrastructure, increases the proportion of distributed renewable energy consumption, and forms a grid-friendly flexible support capability.

[0078] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0081] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy storage cabinet, comprising a cabinet body (1), characterized in that, The cabinet (1) is fixedly installed with a cabinet base (2) at the bottom and a top cover (3) at the top end of the cabinet (1). The cabinet base (2) is provided with a base (4) at the bottom and the cabinet base (2) is fixedly installed on the base (4). A cabinet door (5) is installed on one side of the cabinet (1). A back panel (7) is fixedly installed on the side of the cabinet (1) away from the cabinet door (5). Side panels (6) are symmetrically installed on both sides of the cabinet (1) between the cabinet door (5) and the back panel (7). A plug sleeve (11) is fixedly installed on the side panel (6). A charging gun (12) is inserted into the plug sleeve (11). A rainproof mechanism (13) is fixedly installed on the side of the back panel (7) away from the cabinet (1). The top of the rainproof mechanism (13) is located on both sides facing the side panel (6) directly above the charging gun (12). The base (4) has an upper cavity (17) and a lower cavity (18) inside. The side wall of the base (4) facing the cabinet door (5) has a fan-shaped hole (19). There are two fan-shaped holes (19), and the two fan-shaped holes (19) are connected to the upper cavity (17) and the lower cavity (18) respectively. Both the upper cavity (17) and the lower cavity (18) are equipped with wire passing components (20). The end of the wire passing component (20) away from the vertical center line of the base (4) passes through the fan-shaped hole (19). The wire passing component (20) is slidably connected to the fan-shaped hole (19). The top of the base (4) has a first passage (21) that is connected to the bottom of the cabinet base (2). The interior of the base (4) also has a second passage (22) that connects the upper cavity (17) and the lower cavity (18). The rain-shielding mechanism (13) includes an assembly seat (28) fixedly installed on the outer wall of the back plate (7). A cylinder (29) is fixedly installed on the assembly seat (28). A horizontally arranged support bar (30) is also fixedly installed on the upper part of the outer wall of the back plate (7). A vertical plate (31) is fixedly installed on the top of the support bar (30). A fixing frame (33) is fixedly installed on the side of the vertical plate (31) away from the top cover (3). A vertically arranged sliding groove (34) is opened at the end of the fixing frame (33) away from the vertical plate (31). A strip block (35) is slidably installed in the sliding groove (34). The bottom end of the strip block (35) is connected to the output shaft end of the cylinder (29). A crossbar (36) is fixedly installed at both ends of the strip block (35) facing the top cover (3). (36) has locking blocks (37) fixedly installed at both ends. A traction rope (42) is fixedly installed between the two locking blocks (37) on the same side of the strip block (35). An extension plate (38) is integrally provided on the side of the vertical plate (31) facing the top cover (3) and located above the top cover (3). An assembly block (39) is fixedly installed on the extension plate (38). A rotating shaft (40) is rotatably installed inside the assembly block (39). One end of the rotating shaft (40) facing the vertical plate (31) passes through the vertical plate (31). A rotating wheel (41) is fixedly installed at the end of the rotating shaft (40) passing through the vertical plate (31). The traction rope (42) is wrapped around the outside of the rotating wheel (41) once. A rainproof component (44) is fixedly installed at the end of the rotating shaft (40) away from the rotating wheel (41).

2. The energy storage cabinet according to claim 1, characterized in that, A panel (8) is fixedly installed on the top of the cabinet door (5) on the side away from the cabinet body (1). The panel (8) is embedded in the cabinet door (5). A display screen (9) is installed on the panel (8). An indicator light (10) is also installed on the panel (8) above the display screen (9).

3. The energy storage cabinet according to claim 2, characterized in that, The bottom of the top cover (3) is fixedly installed with a connecting shell (14). The bottom end of the connecting shell (14) is sealed and fixedly installed on the top of the cabinet (1). A cooling fan (15) is fixedly installed on one side of the bottom of the connecting shell (14). An air vent facing the cooling fan (15) is opened at the bottom end of the connecting shell (14). A heat dissipation hole (16) is opened at the bottom of the top cover (3) on the outside of the connecting shell (14).

4. The energy storage cabinet according to claim 3, characterized in that, The wire guide assembly (20) includes a wire tube (201), which is horizontally arranged. A fixing block (202) is fixedly installed on the outer wall of one end of the wire tube (201) located in the fan-shaped hole (19). A protruding post (203) is fixedly installed at the center of the end of the fixing block (202) away from the wire tube (201). An arc-shaped groove (23) is opened on the inner wall of the fan-shaped hole (19) along its length direction. The protruding post (203) is slidably disposed in the arc-shaped groove (23).

5. An energy storage cabinet according to claim 4, characterized in that, The bottom wall of the lower cavity (18) is provided with a first annular groove (24), the bottom wall of the upper cavity (17) is fixedly installed with an annular plate (25), the top of the annular plate (25) is provided with a second annular groove (26), the bottom of the outer wall of one end of the conduit (201) located inside the lower cavity (18) and / or the upper cavity (17) is also fixedly installed with a fixing block (202), the bottom of the fixing block (202) is fixedly installed with a protruding post (203), and the protruding post (203) located inside the lower cavity (18) is slidably disposed in the first annular groove (24), and the protruding post (203) located inside the upper cavity (17) is slidably disposed in the second annular groove (26), and the side wall of the cabinet base (2) is provided with a wire hole (27).

6. An energy storage cabinet according to claim 5, characterized in that, The vertical plate (31) is also provided with a strip hole (32), which is oriented toward the connecting shell (14).

7. An energy storage cabinet according to claim 6, characterized in that, The outer side of the wheel (41) is provided with a third annular groove, and the traction rope (42) is wound in the third annular groove. The outer side of the wheel (41) is also fixedly installed with a positioning and limiting pin (43) for positioning the traction rope (42).

8. An energy storage cabinet according to claim 7, characterized in that, The rain shield assembly (44) includes a rain shield plate (45). A mounting groove (50) is provided on the bottom surface of the rain shield plate (45) near the rotating shaft (40). A connecting plate (47) is fixedly installed in the mounting groove (50). A fixing sleeve (48) is integrally provided on the end of the connecting plate (47) away from the rain shield plate (45). The fixing sleeve (48) is fixedly installed on the end of the rotating shaft (40). When the rain shield plate (45) is located directly above the charging gun (12), a groove (49) is also provided on the bottom end face. A photovoltaic panel (46) is installed in the groove (49).

9. An energy storage cabinet according to claim 8, characterized in that, A connecting strip (51) is fixedly installed at the bottom end of the strip block (35). A threaded hole (52) is opened at the end of the connecting strip (51) away from the strip block (35). The output shaft end of the cylinder (29) is fixedly installed in the threaded hole (52).

10. A sponge power method using the energy storage cabinet described in claim 9 to regulate power output at the end of the power grid, characterized in that, The main steps include the following: S1. Obtain the status of the inverter module and charging module in the energy storage cabinet, and verify the status of the inverter module and charging module; S2. Monitor the real-time charging power P of the charging module. c Determine the threshold allowable power P0 and judge the real-time charging power P. c Is it greater than the gate-permitted power P0? S4, if P in S2 c If -P0>0, then the inverter is controlled to discharge, and the discharge power is P. c The difference between -P0 and the initial state of charge (SOC) of the energy storage module is determined, and it is also determined whether the SOC of the energy storage module is greater than 10% during this process. S5. If SOC > 10% in S4, control the inverter to continue discharging; if SOC ≤ 10%, limit the real-time charging power, making P... c =P0; S6. If P in S3 c -P0≤0, determine whether the initial state of charge (SOC) of the energy storage module is greater than 90% during this process; S7. If SOC > 90% in S6, the real-time charging power of the inverter is 0. If SOC ≤ 90%, the inverter charging power is controlled to be P0 - P. c .

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