Energy storage device and usage method in a photovoltaic power station

Abstract

The present invention discloses an energy storage device and a usage method in a photovoltaic power station, belonging to the technical field of battery energy storage equipment. The energy storage device in the photovoltaic power station includes an energy storage box. A partition is arranged inside the box body of the energy storage box, and the partition divides the box body into an electrical chamber and an energy storage chamber. A plurality of energy storage units are arranged inside the energy storage chamber; each energy storage unit includes a fixed seat, a sliding seat is slidably arranged above the fixed seat, a battery module is installed on the sliding seat, a fixed frame is fixedly arranged at one end of the fixed seat, a wiring terminal connected to the pole column at the end of the battery module is arranged on the fixed frame, and a shielding mechanism for isolating and shielding the battery is arranged on the sliding seat. By adopting the energy storage device and the usage method in the photovoltaic power station of the present invention, the problem that the entire energy storage device is damaged due to the high-temperature combustion of the storage battery in the energy storage device can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery energy storage devices, and particularly to an energy storage device and a usage method in a photovoltaic power station. Background Art

[0002] Under the background of the global active promotion of the clean energy transformation, photovoltaic power generation, as a sustainable way to obtain green energy, has been widely applied and developed rapidly. As a key component of the photovoltaic power generation system, the energy storage device plays an indispensable role in balancing the power supply and demand, improving the power stability, and realizing the efficient storage and utilization of energy. Among them, the storage battery has become the most commonly used energy storage element in the current photovoltaic power generation energy storage device due to its high energy density, good charge and discharge performance, and relatively mature technology. However, in the actual operation process, the storage battery of the energy storage device in photovoltaic power generation frequently faces the severe problem of high-temperature combustion, which seriously threatens the safe and stable operation of the entire photovoltaic power generation system and the safety of the surrounding personnel and facilities. Photovoltaic power stations are usually built in open areas to obtain sufficient light resources. These areas are often exposed to strong solar radiation during the day, and the ambient temperature is relatively high. Moreover, in some areas, the temperature difference between day and night is extremely large. The storage battery works continuously in the high-temperature environment during the day, and the temperature drops sharply at night. The frequent temperature changes cause the material properties inside the storage battery to change, further exacerbating the heating problem of the battery.

[0003] The existing patent 202411403376.7 discloses an energy storage device for a storage photovoltaic power station, including a fixed frame, an installation frame structure, a door panel structure, a side door panel structure, and a rainproof canopy. The surface of the fixed frame is fixedly docked with the installation frame structure, the surface of the fixed frame is movably connected with the door panel structure, the surface of the fixed frame is movably connected with the side door panel structure, the top surface of the fixed frame is fixedly docked with the rainproof canopy, the surface of the installation frame structure is movably docked with the energy storage device, and ventilation holes are provided on both sides for heat dissipation. There is a gap between the installation frame and the frame to ensure the air flow, and a cooling air conditioner is used for cooling to improve the heat dissipation effect of the energy storage device. However, in the above patent, the energy storage devices are all set together. When the temperature of the energy storage device is too high and catches fire, it will cause the simultaneous damage of other energy storage devices, affecting the normal use of the entire energy storage device. Summary of the Invention

[0004] The purpose of the present invention is to provide an energy storage device and a usage method in a photovoltaic power station to solve the problem that the high-temperature combustion of the storage battery in the energy storage device causes the damage of the entire energy storage device.

[0005] To achieve the above object, the present invention provides an energy storage device in a photovoltaic power station, including an energy storage box. A partition is provided inside the box body of the energy storage box, and the partition divides the box body into an electrical chamber and an energy storage chamber. A number of energy storage units are provided inside the energy storage chamber; each energy storage unit includes a fixed seat, a sliding seat is slidably arranged above the fixed seat, a battery module is installed on the sliding seat, one end of the fixed seat is fixedly provided with a fixed frame, and a wiring terminal connected to the pole column at the end of the battery module is provided on the fixed frame. A shielding mechanism for isolating and shielding the battery module is provided on the sliding seat, and a cooling mechanism for cooling the battery module is provided at one end of the sliding seat away from the fixed frame. The sliding of the sliding seat drives the shielding mechanism to rotate to isolate and shield the battery module, and at the same time the sliding of the sliding seat drives the cooling mechanism to unfold to cool the battery module from one end of the battery module.

[0006] Preferably, a number of support platforms are provided inside the energy storage chamber. The support platforms are fixed on the inner wall of the box body, the fixed seats are fixed on the support platforms, and a number of mounting rods are provided on the support platforms and the top inner wall of the box body. A number of first nozzles are fixedly provided on the mounting rods. The first nozzles are located directly above the battery module. The first nozzles are connected to an air pump in the electrical chamber through a connecting pipe. The air pump is connected to a cooling gas tank provided in the electrical chamber, and the air pump is connected to a controller provided in the electrical chamber.

[0007] Preferably, the shielding mechanism includes a first shielding unit provided on both sides of the battery module and a second shielding unit provided at one end of the battery module close to the fixed frame; the first shielding unit includes a first support seat, the first support seat is fixedly provided on both sides of the sliding seat, and a number of first rotating shafts are rotatably arranged on the first support seat in a linear array. The first rotating shafts are rotatably connected to the sliding seat; the second shielding unit includes a second support seat, the second support seat is fixedly provided on the sliding seat, and a number of third rotating shafts are rotatably arranged on the second support seat in a linear array. The third rotating shafts are rotatably connected to the sliding seat; shielding structures for shielding the battery module are provided on both the first rotating shafts and the third rotating shafts, a first power structure for driving the first rotating shafts to rotate is provided on the fixed seat, and a second power structure for driving the third rotating shafts to rotate is provided on the fixed seat.

[0008] Preferably, the first power structure includes a transmission gear, the transmission gear is fixedly provided on the first rotating shafts at both ends of the first support seat, a rack is fixedly provided on the fixed seat, and the transmission gear meshes with the rack.

[0009] Preferably, the second power structure includes a transmission sleeve. The transmission sleeve is located outside the third rotating shafts at both ends of the second support seat. The third rotating shafts are rotatably connected to the transmission sleeve. The transmission sleeve is fixed on the fixed seat through a mounting seat. Helical guide grooves distributed in a circumferential array are provided on the inner wall of the transmission sleeve. Fixed pins are provided on the third rotating shafts. The fixed pins correspond to the guide grooves one by one. The fixed pins are located in the guide grooves and are slidably connected to the guide grooves.

[0010] Preferably, the shielding structure includes a central axis. The bottom end of the central axis is rotatably connected to a connecting rod fixedly arranged on the first rotating shaft or the third rotating shaft. Connecting seats are arranged above the first support seat and the second support seat respectively. A second rotating shaft is rotatably arranged on the connecting seat. The second rotating shafts on the connecting seats above the first support seat correspond to the first rotating shafts one by one, and the second rotating shafts on the connecting seats above the second support seat correspond to the third rotating shafts one by one. The top end of the central axis is rotatably connected to a pin column fixedly arranged on the second rotating shaft. A baffle is fixedly arranged on the central axis. The bottom end of the central axis is fixedly provided with a first bevel gear, which meshes with a second bevel gear fixedly arranged on the fixing plate. The fixing plate is fixedly arranged on the first support seat or the second support seat, and the second bevel gear is coaxial with the first rotating shaft or the third rotating shaft.

[0011] Preferably, a cooling mechanism for cooling the battery module is arranged at one end of the sliding seat away from the fixing frame. The cooling mechanism includes a vertically arranged guide rod, which is located at both ends of the sliding seat and fixedly connected to the sliding seat. A fixing sleeve is fixedly arranged at the bottom end of the guide rod. A first transmission rod is hinged to the fixing sleeve. A positioning plate for positioning the bottom end of the first transmission rod is fixedly arranged on the fixing seat. The top end of the first transmission rod is hinged to the bottom end of the second transmission rod. The middle part of the second transmission rod is hinged to the first sliding sleeve. The first sliding sleeve is slidably sleeved on the guide rod. A second sliding sleeve is arranged above the first sliding sleeve. The second sliding sleeve is slidably connected to the guide rod. A third connecting rod is hinged to the second sliding sleeve. The bottom end of the third connecting rod is hinged to the top end of the second connecting rod. Support rods are arranged between the fixing sleeves on the two guide rods, between the first sliding sleeves, and between the second sliding sleeves. A plurality of second nozzles are arranged on the support rods, and the second nozzles are communicated with an air pump.

[0012] Preferably, the battery module is connected to the sliding seat through a locking mechanism. The locking mechanism includes a plug arranged at the bottom of the battery module. Corresponding slots are arranged on the sliding seat. The plug is located in the slot. An installation groove perpendicular to and communicated with the slot is arranged on the sliding seat. A locking pin is slidably arranged in the installation groove. A locking groove for inserting the locking pin is arranged on the plug. A first spring for inserting the locking pin into the locking groove is arranged in the installation groove.

[0013] A pushing structure for driving the locking pin to slide in the installation groove is arranged on the sliding seat. The pushing structure includes a push rod, which is slidably connected to the sliding seat. A transmission hole is arranged on the locking pin. One end of the push rod contacts the inclined surface of the transmission hole. The end of the push rod extending out of the sliding seat is connected through a push plate. A second spring for driving the push rod to reset is arranged between the push plate and the sliding seat.

[0014] Preferably, an electric cylinder for driving the sliding seat to slide on the fixed seat is arranged on the fixed seat, and a guide rail for guiding the sliding of the sliding seat is arranged on the fixed seat; a temperature sensor for monitoring the temperature of the battery module is arranged on the sliding seat, an alarm lamp corresponding to each battery module is arranged on the box body, and an air conditioner for cooling the energy storage chamber is arranged in the electrical chamber. The electric cylinder, the alarm lamp, the temperature sensor, and the air conditioner are all connected to a controller in the electrical chamber.

[0015] The usage method of the energy storage device in the above photovoltaic power station includes the following steps:

[0016] S1. Install the battery module on the sliding seat, insert the pin at the bottom of the battery module into the slot, the pin pushes the locking pin to slide in the installation groove, and the first spring is compressed. When the locking pin slides to the locking groove, the locking pin is inserted into the locking groove under the action of the first spring, and the battery module is fixed on the sliding seat;

[0017] S2. Install the sliding seat on the fixed seat, the driving gear meshes with the rack, insert the pole into the corresponding terminal, and fix the fixed seat on the support platform;

[0018] S3. After the equipment is debugged, turn on the air conditioner to control the temperature of the energy storage chamber through the air conditioner, and the temperature sensor detects the temperature of the battery module;

[0019] S4. When the temperature of the battery module exceeds the threshold value, the electric cylinder extends, the pole is separated from the terminal, the electric cylinder drives the sliding seat to slide on the fixed seat, the sliding seat drives the first rotating shaft to move synchronously through the first support seat, the driving gear on the first rotating shaft rotates under the action of the rack, the driving gear drives the first rotating shaft to rotate, the first rotating shaft drives the central shaft to rotate around the first rotating shaft through the connecting rod, the central shaft rotates from the horizontal state to the vertical state, the central shafts at both ends of the first support seat drive the connecting seat to move upward, the connecting seat drives the central shaft in the middle of the first support seat to rotate around the first rotating shaft through the second rotating shaft, during the rotation of the central shaft, the first bevel gear is blocked by the second bevel gear, so that the first bevel gear drives the central shaft to rotate self, the central shaft drives the baffle to rotate, the baffle unfolds from the folded state, and the adjacent baffles overlap after rotation to form a shielding wall to shield the battery module;

[0020] S5. At the same time, the sliding seat drives the second support seat to move, the second support seat drives the third rotating shaft to move, the fixing pin on the third rotating shaft slides along the guide groove under the action of the guide groove, the third rotating shaft rotates, the third rotating shaft drives the central shaft on it to rotate around the third rotating shaft through the connecting rod, the central shaft rotates from the horizontal state to the vertical state, the first bevel gear at the bottom end of the central shaft drives the central shaft to rotate self under the action of the second bevel gear, and the central shaft drives the baffle to rotate and overlap to shield one end of the battery module;

[0021] S6. The sliding seat drives the fixed sleeve to move synchronously through the guide rod. The bottom end of the first transmission rod is blocked by the positioning plate, causing the first transmission rod to rotate. The first transmission rod drives the second transmission rod to rotate, and the second transmission rod drives the third transmission rod to rotate. Both the first sliding sleeve and the second sliding sleeve slide upward along the guide rod, increasing the distance between the support rods.

[0022] S7. The air pump operates, and the air pump sprays cooling gas through the first nozzle and the second nozzle respectively towards the battery module in a directional manner to cool the battery module.

[0023] The advantages and positive effects of the energy storage device and its usage method in the photovoltaic power station of the present invention are as follows:

[0024] 1. In the present invention, a battery module is installed on the sliding seat. One end of the fixed seat is fixedly provided with a fixed frame, and a wiring terminal connected to the pole column at the end of the battery module is arranged on the fixed frame. Wiring is carried out between the wiring terminals to connect adjacent battery modules. This facilitates the connection and disconnection of the battery module from the entire energy storage device, reduces the impact of a high-temperature or burning battery module on other battery modules, and is beneficial for protecting the entire energy storage device.

[0025] 2. In the present invention, a first power structure for driving the first rotating shaft to rotate and a second power structure for driving the third rotating shaft to rotate are arranged between the fixed seat and the sliding seat. When the sliding seat slides, synchronous movement of the first rotating shaft and the third rotating shaft can be achieved without adding an additional power structure, which is beneficial for improving the linkage between the sliding seat, the first rotating shaft, and the third rotating shaft.

[0026] 3. In the present invention, a shielding structure for shielding the battery module is arranged on both the first rotating shaft and the third rotating shaft. A baffle is arranged on the central shaft, and the central shaft is provided with a first bevel gear. The first bevel gear rotates around the first rotating shaft and the third rotating shaft under the action of the second bevel gear and rotates on its own axis, driving the baffle to fold or unfold, thereby forming a shielding wall to reduce the impact of a faulty battery module on other energy storage units; and it is convenient for the storage of the shielding structure, and when the battery module is operating normally, it reduces the impact of the shielding structure on the heat dissipation of the battery module.

[0027] 4. In the present invention, a cooling mechanism is arranged behind the battery module, which can accelerate the cooling of the battery module and reduce the spread of fire. When a fault occurs in the battery module and the sliding seat slides, the support rods unfold, and the second nozzles are evenly distributed at one end of the battery module to improve the cooling and fire extinguishing effects. When the battery module is operating normally, the support rods fold up to facilitate the installation of the battery module.

[0028] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0029] Figure 1Schematic structural diagram of an embodiment of the present invention;

[0030] Figure 2 Schematic structural diagram of the energy storage box of an embodiment of the present invention;

[0031] Figure 3 Schematic three-dimensional front-end structure diagram of the energy storage unit of an embodiment of the present invention;

[0032] Figure 4 Schematic three-dimensional rear-end structure diagram of the energy storage unit of an embodiment of the present invention;

[0033] Figure 5 Schematic top-view structure diagram of the energy storage unit of an embodiment of the present invention;

[0034] Figure 6 Schematic partial structure diagram of the shielding mechanism of an embodiment of the present invention;

[0035] Figure 7 Schematic structure diagram of the transmission sleeve of an embodiment of the present invention;

[0036] Figure 8 Schematic structure diagram of the central shaft installation of an embodiment of the present invention;

[0037] Figure 9 Schematic partial structure diagram of the first rotating shaft of an embodiment of the present invention;

[0038] Figure 10 Schematic partial structure diagram of the cooling mechanism of an embodiment of the present invention;

[0039] Figure 11 Schematic structure diagram of the locking mechanism of an embodiment of the present invention;

[0040] Figure 12 Schematic diagram of the pushing structure of an embodiment of the present invention.

[0041] Reference numerals

[0042] 1. Energy storage box; 11. Box body; 12. Partition board; 13. Electrical chamber; 14. Support platform; 15. Installation rod; 16. First nozzle;

[0043] 2. Energy storage unit; 21. Fixed seat; 22. Slide seat; 23. Battery module; 24. Electric cylinder; 25. Guide rail; 26. Fixed frame; 27. Terminal; 28. Pole; 29. First support seat; 210. First rotating shaft; 211. Driving gear; 212. Rack; 213. Connecting rod; 214. Central shaft; 215. Baffle; 216. Second rotating shaft; 217. Connecting seat; 218. First bevel gear; 219. Second bevel gear; 220. Fixed plate; 221. Second support seat; 222. Third rotating shaft; 223. Transmission sleeve; 224. Mounting seat; 225. Guide rod; 226. Fixed sleeve; 227. First transmission rod; 228. Positioning plate; 229. First sliding sleeve; 230. Second transmission rod; 231. Second sliding sleeve; 232. Third transmission rod; 233. Support rod; 234. Second nozzle; 235. Slot; 236. Plug; 237. Locking groove; 238. Mounting groove; 239. Locking pin; 240. First spring; 241. Transmission hole; 242. Push rod; 243. Push plate; 244. Second spring; 245. Guide groove. Detailed implementation manner

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. In case of inconsistency, it shall be subject to the meaning described in this specification or the meaning obtained according to the content recorded in this specification. In addition, the terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0046] The following will describe the embodiments of the present invention in detail with reference to the drawings.

[0047] As Figure 1 、 Figure 2As shown in the figure. A energy storage device in a photovoltaic power station includes an energy storage box 1. Inside the box body 11 of the energy storage box 1, a partition 12 is fixedly arranged. The partition 12 divides the box body 11 into an electrical chamber 13 and an energy storage chamber. A heat insulation layer or a flame retardant layer is arranged on the partition 12 to improve the heat insulation and flame retardant effects in the electrical chamber 13. Inside the energy storage chamber, a number of energy storage units 2 are arranged in an array. Inside the electrical chamber 13, electrical components such as an inverter, a controller, an air conditioner, an air pump and a cooling gas tank are arranged. The air conditioner is used to adjust the temperature of the energy storage chamber. The air pump and the cooling gas tank are used to cool down and extinguish fires for the energy storage units 2. What can be stored in the cooling gas tank is liquid carbon dioxide. Electrical components such as the inverter, the controller, the air conditioner and the air pump are all connected to the controller according to the existing technology as needed. One side or both sides of the box body 11 are provided with openings, and a box door is hinged at the opening. Alarm lights corresponding one by one to the battery modules 23 are arranged on the box door. The alarm lights are used to display the faulty energy storage units 2, which is convenient for the staff to repair. The alarm lights are connected to the controller.

[0048] A number of support platforms 14 are fixedly arranged inside the energy storage chamber. The support platforms 14 are fixed on the inner wall of the box body 11. The fixing seats 21 of the energy storage units 2 are fixed on the support platforms 14 by screws. A number of mounting rods 15 are fixedly arranged on the support platforms 14 and the top inner wall of the box body 11. A number of first nozzles 16 are fixedly arranged on the mounting rods 15. The first nozzles 16 are located directly above the battery modules 23. The first nozzles 16 are used to cool down and extinguish fires for the corresponding battery modules 23. The first nozzles 16 are connected to the air pump in the electrical chamber 13 through connecting pipes. The air pump is connected to the cooling gas tank arranged in the electrical chamber 13. A solenoid valve is arranged on the connecting pipe of the first nozzle 16 or on the first nozzle 16. The solenoid valve is connected to the controller. Temperature sensors are arranged on the energy storage units 2. The temperature sensors are used to monitor the temperature of the energy storage units 2. The temperature sensors are connected to the controller.

[0049] As Figure 3 、 Figure 4 、 Figure 5As shown in the figure. The energy storage unit 2 includes a fixed seat 21, and a sliding seat 22 is slidably arranged above the fixed seat 21. An electric cylinder 24 for driving the sliding seat 22 to slide on the fixed seat 21 is arranged on the fixed seat 21, and the electric cylinder 24 is connected to a controller in the electrical chamber 13. A guide rail 25 for guiding the sliding of the sliding seat 22 is fixedly arranged on the fixed seat 21, and the guide rail 25 is arranged along the length direction of the energy storage unit 2. A guide groove is arranged on the sliding seat 22, and the guide rail 25 is located in the guide groove and is slidably connected to the guide groove. A temperature sensor for monitoring the temperature of the battery module 23 is arranged on the sliding seat 22. The battery module 23 is installed on the sliding seat 22, and a fixing frame 26 is fixedly arranged at one end of the fixed seat 21. A wiring terminal 27 connected to the pole 28 at the end of the battery module 23 is arranged on the fixing frame 26. Wiring is carried out between the wiring terminals 27 to connect adjacent battery modules 23. This facilitates the connection and disconnection of the battery module 23 from the entire energy storage device, reduces the impact of the high temperature or combustion of the battery module 23 on other battery modules 23, and is beneficial to protecting the entire energy storage device.

[0050] A shielding mechanism for isolating and shielding the battery module 23 is arranged on the sliding seat 22. The shielding mechanism includes a first shielding unit arranged on both sides of the battery module 23 and a second shielding unit arranged at one end of the battery module 23 close to the fixing frame 26. The first shielding unit includes a first support seat 29, and the first support seat 29 is fixedly arranged on both sides of the sliding seat 22. A plurality of first rotating shafts 210 are linearly arrayed on the first support seat 29, and the first rotating shafts 210 are rotatably connected to the first support seat 29 through bearings. The first rotating shafts 210 are rotatably connected to the sliding seat 22 through bearings. The second shielding unit includes a second support seat 221, and the second support seat 221 is fixedly arranged on the sliding seat 22. A plurality of third rotating shafts 222 are linearly arrayed on the second support seat 221. Both ends of the third rotating shaft 222 are rotatably connected to the first support seat 29 and the sliding seat 22 through bearings.

[0051] As Figure 9 shown in the figure. A first power structure for driving the first rotating shaft 210 to rotate is arranged on the fixed seat 21. The first power structure includes a transmission gear 211, and the transmission gear 211 is fixedly arranged on the first rotating shafts 210 at both ends of the first support seat 29. A rack 212 is fixedly arranged on the fixed seat 21, and the transmission gear 211 meshes with the rack 212. When the sliding seat 22 slides relative to the fixed seat 21, the sliding seat 22 drives the first rotating shaft 210 to move through the first support seat 29, the first rotating shaft 210 drives the transmission gear 211 to move, and the transmission gear 211 rotates under the action of the rack 212, thereby driving the first rotating shaft 210 to rotate.

[0052] As Figure 7As shown in the figure. A second power structure for driving the third rotating shaft 222 to rotate is provided on the fixed seat 21. The second power structure includes a transmission sleeve 223, and the transmission sleeve 223 is located outside the third rotating shaft 222 at both ends of the second support seat 221. The third rotating shaft 222 is rotatably connected to the transmission sleeve 223. The transmission sleeve 223 is fixed on the fixed seat 21 through a mounting seat 224. Spirally distributed guide grooves 245 are provided on the inner wall of the transmission sleeve 223 in a circumferential array, and fixing pins are fixedly provided on the third rotating shaft 222, and the fixing pins correspond to the guide grooves 245 one by one. The fixing pins are located in the guide grooves 245 and are slidably connected to the guide grooves 245. When the sliding seat 22 slides, a relative displacement occurs between the third rotating shaft 222 and the transmission sleeve 223, and the fixing pins move along the spiral guide grooves 245, so that the fixing pins drive the third rotating shaft 222 to rotate.

[0053] Shielding structures for shielding the battery module 23 are provided on both the first rotating shaft 210 and the third rotating shaft 222. The shielding structure includes a central shaft 214, and the central shaft 214 corresponds to the first rotating shaft 210 and the third rotating shaft 222 one by one. The bottom end of the central shaft 214 is rotatably connected to a connecting rod 213 fixedly provided on the first rotating shaft 210 or the third rotating shaft 222 through a bearing. Connecting seats 217 are provided above both the first support seat 29 and the second support seat 221, and a second rotating shaft 216 is rotatably provided on the connecting seat 217 through a bearing. The second rotating shaft 216 on the connecting seat 217 above the first support seat 29 corresponds to the first rotating shaft 210 one by one, and the second rotating shaft 216 on the connecting seat 217 above the second support seat 221 corresponds to the third rotating shaft 222 one by one. The top end of the central shaft 214 is rotatably connected to a pin column fixedly provided on the second rotating shaft 216 through a bearing. When the first rotating shaft 210 rotates, it drives the central shaft 214 to rotate synchronously around the first rotating shaft 210 through the connecting rod 213. The central shaft 214 drives the second rotating shaft 216 to move through the pin column, and the second rotating shaft 216 drives the connecting seat 217 to move upward, so as to adjust the central shaft 214 between a horizontal state and a vertical state.

[0054] As Figure 6 、 Figure 8As shown. A baffle 215 is fixedly arranged on the central shaft 214, and the baffle 215 is a fireproof board. A first bevel gear 218 is fixedly arranged at the bottom end of the central shaft 214, and the first bevel gear 218 meshes with a second bevel gear 219 fixedly arranged on the fixing plate 220. The fixing plate 220 is fixedly arranged on the first support base 29 or the second support base 221. The second bevel gear 219 is coaxial with the first rotating shaft 210 or the third rotating shaft 222. When the first bevel gear 218 rotates around the first rotating shaft 210 or the third rotating shaft 222, the first bevel gear 218 rotates self under the action of the second bevel gear 219, thereby driving the central shaft 214 to rotate, and further driving the baffle 215 to rotate, so that the baffle 215 unfolds when the central shaft 214 is in a vertical state, and adjacent baffles 215 overlap to form a shielding wall, reducing the influence of the faulty battery module 23 on other energy storage units 2. When the central shaft 214 is in a horizontal state, the baffle 215 rotates to the vertical direction of the side of the battery module 23, so as to facilitate the stacking of the central shafts 214 together, and the connecting seat 217 descends, facilitating the storage of the shielding structure, and reducing the influence of the shielding structure on the heat dissipation of the battery module 23 when the battery module 23 is working normally.

[0055] As Figure 10As shown in the figure. A cooling mechanism for cooling the battery module 23 is provided at one end of the sliding seat 22 away from the fixed frame 26. The cooling mechanism includes a vertically arranged guide rod 225, and the guide rod 225 is located at both ends of the sliding seat 22 and fixedly connected to the sliding seat 22. A fixed sleeve 226 is fixedly provided at the bottom end of the guide rod 225, and a first transmission rod 227 is hinged on the fixed sleeve 226. A positioning plate 228 for positioning the bottom end of the first transmission rod 227 is fixedly provided on the fixed seat 21, and the bottom end of the first transmission rod 227 can slide up and down relative to the positioning plate 228. The top end of the first transmission rod 227 is hinged to the bottom end of the second transmission rod 230, and the middle of the second transmission rod 230 is hinged to the first sliding sleeve 229. The first sliding sleeve 229 is slidably sleeved on the guide rod 225. A second sliding sleeve 231 is provided above the first sliding sleeve 229, and the second sliding sleeve 231 is slidably connected to the guide rod 225. A third connecting rod is hinged on the second sliding sleeve 231, and the bottom end of the third connecting rod is hinged to the top end of the second connecting rod. Support rods 233 are fixedly provided between the fixed sleeves 226 on the two guide rods 225, between the first sliding sleeves 229, and between the second sliding sleeves 231. A plurality of second nozzles 234 are provided on the support rods 233, and the second nozzles 234 are communicated with an air pump. An electromagnetic valve is provided on the second nozzle 234 or an electromagnetic valve is provided on the connecting pipe of the air pump. The battery module 23 is cooled and the fire is extinguished through the second nozzle 234 to reduce the spread of the fire. Since there are not many circuits behind the battery module 23, a cooling mechanism is provided behind the battery module 23, which can accelerate the cooling of the battery module 23 and reduce the spread of the fire. When a failure occurs in the battery module 23 and the sliding seat 22 slides, the support rods 233 expand, and the second nozzles 234 are evenly distributed at one end of the battery module 23 to improve the cooling and fire extinguishing effects. When the battery module 23 is working normally, the support rods 233 are folded up to facilitate the installation of the battery module 23.

[0056] As Figure 11 shown. The battery module 23 is connected to the sliding seat 22 through a locking mechanism. The locking mechanism includes a plug pin 236 fixedly provided at the bottom of the battery module 23. The plug pins 236 are provided on both sides of the battery module 23 to improve the connection stability between the battery module 23 and the sliding seat 22. A slot 235 corresponding to the plug pin 236 one by one is provided on the sliding seat 22, and the plug pin 236 is located in the slot 235. An installation slot 238 perpendicular to and communicating with the slot 235 is provided on the sliding seat 22, and a locking pin 239 is slidably provided in the installation slot 238. A locking groove 237 for inserting the locking pin 239 is provided on the plug pin 236, and a first spring 240 for inserting the locking pin 239 into the locking groove 237 is provided in the installation slot 238.

[0057] As Figure 12As shown in the figure. A pushing structure for driving the locking pin 239 to slide in the installation groove 238 is provided on the sliding seat 22. The pushing structure includes a push rod 242, and the push rod 242 is perpendicularly arranged with respect to the locking pin 239. A through hole through which the push rod 242 passes is provided in the sliding seat 22. The through hole communicates with the installation groove 238 and is perpendicularly arranged. The push rod 242 slides in the through hole, and one end of the push rod 242 extends out of the sliding seat 22. The push rod 242 is slidably connected to the sliding seat 22. A transmission hole 241 is provided in the middle of the locking pin 239. One side of the transmission hole 241 away from the slot 235 is an inclined surface, and the other side is a flat surface. An inclined surface is provided on one end of the push rod 242 inserted into the transmission hole 241 and away from the slot 235. The inclined surface of the push rod 242 contacts the inclined surface of the transmission hole 241. One end of the push rod 242 extending out of the sliding seat 22 is connected through a push plate 243. A second spring 244 for driving the push rod 242 to reset is provided between the push plate 243 and the sliding seat 22. By pushing the push rod 242 to slide inward through the push plate 243, the push rod 242 drives the locking pin 239 to slide in the installation groove 238 in a direction away from the plug pin 236 through the inclined surface. The locking pin 239 is pulled out of the locking groove 237, facilitating the disassembly of the battery module 23 on the sliding seat 22.

[0058] The usage method of the energy storage device in the above photovoltaic power station includes the following steps:

[0059] S1. Install the battery module 23 on the sliding seat 22. Insert the plug pin 236 at the bottom of the battery module 23 into the slot 235. The plug pin 236 drives the locking pin 239 to slide in the installation groove 238, and the first spring 240 is compressed. When the locking pin 239 slides to the locking groove 237, the locking pin 239 is inserted into the locking groove 237 under the action of the first spring 240, fixing the battery module 23 on the sliding seat 22.

[0060] S2. Install the sliding seat 22 on the fixed seat 21. The transmission gear 211 meshes with the rack 212. Insert the pole 28 into the corresponding terminal 27, and fix the fixed seat 21 on the support platform 14.

[0061] S3. After the equipment is debugged, turn on the air conditioner. Control the temperature of the energy storage cavity through the air conditioner, and the temperature sensor detects the temperature of the battery module 23.

[0062] S4. When the temperature of the battery module 23 exceeds the threshold, the electric cylinder 24 extends, the pole 28 is separated from the terminal 27, and the faulty battery module 23 is electrically separated from the entire energy storage device. The electric cylinder 24 drives the slide block 22 to slide on the fixed seat 21. The slide block 22 drives the first rotating shaft 210 to move synchronously through the first support seat 29. The transmission gear 211 on the first rotating shaft 210 rotates under the action of the rack 212; the transmission gear 211 drives the first rotating shaft 210 to rotate. The first rotating shaft 210 drives the central shaft 214 to rotate around the first rotating shaft 210 through the connecting rod 213, and the central shaft 214 rotates from the horizontal state to the vertical state; the central shafts 214 at both ends of the first support seat 29 drive the connecting seat 217 to move upward. The connecting seat 217 drives the central shaft 214 in the middle of the first support seat 29 to rotate around the first rotating shaft 210 through the second rotating shaft 216. During the rotation of the central shaft 214, the first bevel gear 218 is blocked by the second bevel gear 219, so that the first bevel gear 218 drives the central shaft 214 to rotate self. The central shaft 214 drives the baffle 215 to rotate, and the baffle 215 unfolds from the folded state. The adjacent baffles 215 overlap after rotation to form a shielding wall to shield the battery module 23.

[0063] S5. At the same time, the slide block 22 drives the second support seat 221 to move. The second support seat 221 drives the third rotating shaft 222 to move. The fixing pin on the third rotating shaft 222 slides along the guide groove 245 under the action of the guide groove 245, and the third rotating shaft 222 rotates; the third rotating shaft 222 drives the central shaft 214 thereon to rotate around the third rotating shaft 222 through the connecting rod 213. The central shaft 214 rotates from the horizontal state to the vertical state. The first bevel gear 218 at the bottom end of the central shaft 214 drives the central shaft 214 to rotate self under the action of the second bevel gear 219. The central shaft 214 drives the baffle 215 to rotate and overlap to shield one end of the battery module 23.

[0064] S6. The slide block 22 drives the fixed sleeve 226 to move synchronously through the guide rod 225. The bottom end of the first transmission rod 227 is blocked by the positioning plate 228, and the first transmission rod 227 rotates. The first transmission rod 227 drives the second transmission rod 230 to rotate. The second transmission rod 230 drives the third transmission rod 232 to rotate. The first sliding sleeve 229 and the second sliding sleeve 231 both slide upward along the guide rod 225, and the distance between the support rods 233 increases.

[0065] S7. The air pump works. The air pump sprays the cooling gas to the battery module 23 respectively through the first nozzle 16 and the second nozzle 234 to cool the battery module 23; at the same time, the alarm lamp displays an alarm for the faulty battery module 23.

[0066] Therefore, by adopting the energy storage device and the usage method in the photovoltaic power station of the present invention, the problem that the entire energy storage device is damaged due to the high-temperature combustion of the storage battery in the energy storage device can be solved.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An energy storage device in a photovoltaic power station, characterized in that: The energy storage box comprises an energy storage box, wherein a partition is provided inside the box body of the energy storage box, the partition divides the box body into an electrical room and an energy storage room, and a plurality of energy storage units are provided inside the energy storage room; the energy storage unit comprises a fixed seat, a slide is slidably provided above the fixed seat, a battery module is mounted on the slide, a fixing frame is fixedly provided at one end of the fixed seat, the fixing frame is provided with a connection terminal connected to the pole of the end of the battery module, a shielding mechanism for isolating and shielding the battery module is provided on the slide, a cooling mechanism for cooling the battery module is provided at the end of the slide away from the fixing frame, the sliding of the slide drives the shielding mechanism to rotate to isolate and shield the battery module, and the sliding of the slide drives the cooling mechanism to expand and cool the battery module from one end of the battery module; The shielding mechanism includes a first shielding unit arranged on both sides of the battery module and a second shielding unit arranged at one end of the battery module near the fixed frame; the first shielding unit includes a first support seat, the first support seat is fixedly arranged on both sides of the slide, and a plurality of first rotating shafts are rotatably arranged on the first support seat in a linear array, and the first rotating shaft is rotatably connected to the slide; the second shielding unit includes a second support seat, the second support seat is fixedly arranged on the slide, and a plurality of third rotating shafts are rotatably arranged on the second support seat in a linear array, and the third rotating shaft is rotatably connected to the slide; a shielding structure for shielding the battery module is provided on the first rotating shaft and the third rotating shaft, a first power structure for driving the first rotating shaft to rotate is provided on the fixed seat, and a second power structure for driving the third rotating shaft to rotate is provided on the fixed seat; The first gear is fixedly mounted on the support frame, and the second gear is engaged with the first and second gears and is engaged with the first and second gears of the driving member. The cooling mechanism includes a vertically arranged guide rod, which is located at both ends of the slide and fixedly connected to the slide, a fixed sleeve is fixedly provided at the bottom end of the guide rod, a first transmission rod is hinged on the fixed sleeve, and a positioning plate for positioning the bottom end of the first transmission rod is fixedly provided on the fixed seat, the top end of the first transmission rod is hinged to the bottom end of the second transmission rod, the middle part of the second transmission rod is hinged to the first sleeve, the first sleeve sliding sleeve is arranged on the guide rod, a second sleeve is arranged above the first sleeve, the second sleeve is slidably connected to the guide rod, a third connecting rod is hinged on the second sleeve, and the bottom end of the third connecting rod is hinged to the top end of the second connecting rod; support rods are provided between the fixed sleeves on the two guide rods, between the first sleeves, and between the second sleeves, and a number of second nozzles are provided on the support rods, and the second nozzles are connected to the air pump.

2. The energy storage device in a photovoltaic power station according to claim 1, characterized in that: A number of support platforms are arranged in the energy storage chamber. The support platforms are fixed on the inner wall of the box body. The fixed seat is fixed on the support platform. A number of mounting rods are arranged on the top inner wall of the support platform and the box body. A number of first nozzles are fixedly arranged on the mounting rods. The first nozzles are located directly above the battery module. The first nozzles are connected to an air pump in the electrical chamber through a connecting pipe. The air pump is connected to a cooling gas tank arranged in the electrical chamber. The air pump is connected to a controller arranged in the electrical chamber.

3. The energy storage device in a photovoltaic power station according to claim 2, characterized in that: The first power structure includes a transmission gear. The transmission gear is fixedly arranged on the first rotating shafts at both ends of the first support seat. A rack is fixedly arranged on the fixed seat. The transmission gear meshes with the rack.

4. The energy storage device in a photovoltaic power station according to claim 3, wherein: The second power structure includes a transmission sleeve. The transmission sleeve is located outside the third rotating shaft at both ends of the second support seat. The third rotating shaft is rotatably connected to the transmission sleeve. The transmission sleeve is fixed on the fixed seat through a mounting seat. Helical guide grooves distributed in a circumferential array are arranged on the inner wall of the transmission sleeve. Fixed pins are arranged on the third rotating shaft. The fixed pins correspond to the guide grooves one by one. The fixed pins are located in the guide grooves and are slidably connected to the guide grooves.

5. The energy storage device in a photovoltaic power station according to claim 4, wherein: The battery module and the sliding seat are connected through a locking mechanism. The locking mechanism includes a plug arranged at the bottom of the battery module. Slots corresponding to the plugs one by one are arranged on the sliding seat. The plugs are located in the slots. An installation groove perpendicular to and communicating with the slots is arranged on the sliding seat. A locking pin is slidably arranged in the installation groove. A locking groove for inserting the locking pin is arranged on the plug. A first spring for inserting the locking pin into the locking groove is arranged in the installation groove. A pushing structure for driving the locking pin to slide in the installation groove is arranged on the sliding seat. The pushing structure includes a push rod. The push rod is slidably connected to the sliding seat. A transmission hole is arranged on the locking pin. One end of the push rod contacts the inclined surface of the transmission hole. The end of the push rod extending out of the sliding seat is connected through a push plate. A second spring for driving the push rod to reset is arranged between the push plate and the sliding seat.

6. The energy storage device in a photovoltaic power station according to claim 5, characterized in that: An electric cylinder for driving the sliding seat to slide on the fixed seat is arranged on the fixed seat. A guide rail for guiding the sliding of the sliding seat is arranged on the fixed seat. A temperature sensor for monitoring the temperature of the battery module is arranged on the sliding seat. Alarm lights corresponding to the battery modules one by one are arranged on the box body. An air conditioner for cooling the energy storage chamber is arranged in the electrical chamber. The electric cylinder, the alarm lights, the temperature sensor, and the air conditioner are all connected to a controller arranged in the electrical chamber.

7. A method for using an energy storage device in a photovoltaic power station as described in claim 6, characterized in that, It includes the following steps: S1. Install the battery module on the sliding seat. Insert the plug at the bottom of the battery module into the slot. The plug pushes the locking pin to slide in the installation groove. The first spring is compressed. When the locking pin slides to the locking groove, the locking pin is inserted into the locking groove under the action of the first spring, and the battery module is fixed on the sliding seat. S2. Install the sliding seat on the fixed seat. The transmission gear meshes with the rack. Insert the pole column into the corresponding terminal. Fix the fixed seat on the support platform. S3. After the equipment debugging is completed, turn on the air conditioner. Control the temperature of the energy storage chamber through the air conditioner. The temperature sensor detects the temperature of the battery module. S4. When the temperature of the battery module exceeds the threshold, the electric cylinder extends, the pole column is separated from the terminal, the electric cylinder drives the slide seat to slide on the fixed seat, the slide seat drives the first rotating shaft to move synchronously through the first support seat, the transmission gear on the first rotating shaft rotates under the action of the rack, the transmission gear drives the first rotating shaft to rotate, the first rotating shaft drives the central shaft to rotate around the first rotating shaft through the connecting rod, the central shaft rotates from the horizontal state to the vertical state, the central shafts at both ends of the first support seat drive the connecting seat to move upward, the connecting seat drives the central shaft in the middle of the first support seat to rotate around the first rotating shaft through the second rotating shaft, during the rotation of the central shaft, the first bevel gear is blocked by the second bevel gear, so that the first bevel gear drives the central shaft to rotate self, the central shaft drives the baffle to rotate, the baffle unfolds from the folded state, and the adjacent baffles overlap after rotation to form a shielding wall to shield the battery module; S5. At the same time, the slide seat drives the second support seat to move, the second support seat drives the third rotating shaft to move, the fixing pin on the third rotating shaft slides along the guide groove under the action of the guide groove, the third rotating shaft rotates, the third rotating shaft drives the central shaft thereon to rotate around the third rotating shaft through the connecting rod, the central shaft rotates from the horizontal state to the vertical state, the first bevel gear at the bottom end of the central shaft drives the central shaft to rotate self under the action of the second bevel gear, and the central shaft drives the baffle to rotate and overlap to shield one end of the battery module; S6. The slide seat drives the fixed sleeve to move synchronously through the guide rod, the bottom end of the first transmission rod is blocked by the positioning plate, the first transmission rod rotates, the first transmission rod drives the second transmission rod to rotate, the second transmission rod drives the third transmission rod to rotate, and both the first sliding sleeve and the second sliding sleeve slide upward along the guide rod, and the distance between the support rods increases; S7. The air pump works, and the air pump sprays the cooling gas to the battery module through the first nozzle and the second nozzle respectively in a directional manner to cool down the battery module.

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