A photovoltaic energy storage cabinet and an energy storage method for a solar photovoltaic system

Abstract

The present application relates to the technical field of energy storage cabinet, and discloses a photovoltaic energy storage cabinet and an energy storage method for a solar photovoltaic system, which comprises a box body, an energy storage bin is arranged in the box body, a plurality of battery assembly racks are arranged in the energy storage bin, an automatic fire extinguisher is arranged on the battery assembly rack, a residual cavity is arranged between the battery assembly rack and the inner wall of the energy storage bin, and a guide rail is arranged on the inner bottom wall of the energy storage bin. When a fire occurs, the driving assembly first pushes the battery assembly racks on both sides of the fire source away from the fire source, and then the fireproof cloth is unfolded and isolated on both sides of the fire source, so that the fire can be effectively prevented from spreading to both sides, thereby reducing the loss, and finally the automatic fire extinguisher is used to extinguish the fire source. Since the battery assembly rack is in a small space after being isolated by the fireproof cloth, the dispersion range of the fire extinguishing agent is smaller, and the fire extinguishing efficiency is higher.

Description

Technical Field

[0001] This invention relates to the field of energy storage cabinet technology, specifically to a photovoltaic energy storage cabinet and an energy storage method for a solar photovoltaic system. Background Technology

[0002] A photovoltaic energy storage cabinet is a device that integrates a photovoltaic power generation system and an energy storage battery system into a standardized cabinet. It is mainly used to store the electrical energy generated by photovoltaic power generation and release it for use when needed, providing energy buffering and flexible scheduling capabilities for the photovoltaic system. The photovoltaic energy storage cabinet mainly includes a battery compartment for storing batteries, an electrical equipment compartment for storing switch cabinets and transformer cabinets, a temperature control system, a fire protection system, etc.

[0003] Existing photovoltaic energy storage cabinets have certain shortcomings in use: Firstly, in order to save space, the internal space of the battery compartment is large, and the batteries are installed relatively densely. Although there is a fire protection system, the fire extinguishing efficiency is not good, and the batteries are easily affected by high temperatures, which can lead to larger fires. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a photovoltaic energy storage cabinet and an energy storage method for solar photovoltaic systems, which has advantages such as low safety risk and easy maintenance, and solves the problem of poor efficiency of the internal fire protection system of existing photovoltaic energy storage cabinets.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a photovoltaic energy storage cabinet, including a box body, an energy storage compartment is provided inside the box body, multiple battery mounting racks are provided inside the energy storage compartment, automatic fire extinguishers are provided on the battery mounting racks, a cavity is provided between the battery mounting racks and the inner walls on both sides of the energy storage compartment, a guide rail is provided on the bottom wall of the energy storage compartment, rollers extending into the guide rail are provided at the bottom of the battery mounting racks, and an isolation component and a drive component are also provided inside the energy storage compartment; The isolation assembly is located on one side of the battery assembly rack, and the isolation assembly includes two rolls of fireproof cloth; The drive assembly is installed on the top wall inside the energy storage compartment. The drive assembly is used to separate the battery mounting rack adjacent to the burning battery. The drive assembly is also used to unfold two rolls of fireproof cloth to separate the burning battery. The drive assembly is also used to isolate the assembly from moving, forcing the isolation assembly to move next to the burning battery mounting rack; When a fire occurs, the drive unit operates, forcing the burning battery rack to separate from the adjacent battery rack, and forcing two rolls of fireproof cloth to unfold and isolate the two sides of the burning battery rack. Once the battery rack is isolated, the automatic fire extinguisher operates to extinguish the fire in a small area.

[0006] Preferably, the battery mounting rack has notches on both sides of its top edge. The drive assembly includes two longitudinal slides fixed to the top wall of the energy storage compartment. A longitudinal slide block is provided on each of the two longitudinal slides. A transverse slide is fixedly connected between the two longitudinal slide blocks. A transverse slide block is provided on the transverse slide block. A strip plate is provided below the transverse slide block. A vertical rod is fixed between the strip plate and the transverse slide block. Two vertically downward main electric push rods are installed on the surface of the strip plate. A shaft is fixed to the output end of each main electric push rod. A pusher for driving the two main electric push rods to move in opposite directions is provided on the surface of the strip plate.

[0007] Preferably, the surface of the strip plate is provided with a horizontal strip-shaped hole, and the pusher includes a motor fixed to the bottom of the horizontal slide block. The output shaft of the motor is fixed with a disk, and the surface of the disk is provided with two connecting rods arranged in a ring array. One end of the connecting rod is rotatably connected to the surface of the disk, and the other end of the connecting rod is hinged to a slider. The slider is slidably connected to the horizontal strip-shaped hole, and the main electric push rod passes through the slider and is fixedly connected to the slider.

[0008] Preferably, the isolation assembly further includes a vertical plate located on one side of the battery assembly rack, the top of the vertical plate being fixedly connected to a transverse slide, and two rolls of fireproof cloth being symmetrically installed on the surface of the vertical plate.

[0009] Preferably, two symmetrically distributed shells are installed on the vertical plate. The shells have vertical strip-shaped holes on their surfaces. A rotating shaft is rotatably connected inside the shells. The fireproof cloth is wrapped around the rotating shaft. One inner end of the fireproof cloth is fixed to the rotating shaft, and the outer end of the fireproof cloth extends to the outside of the shell through the vertical strip-shaped holes. A vertical tube is fixed to the outer end of the fireproof cloth, and the inner diameter of the vertical tube is larger than the diameter of the shaft.

[0010] Preferably, the top end of the rotating shaft extends to the outside of the housing, and a spiral spring is sleeved on the top end of the rotating shaft. The inner and outer ends of the spiral spring are fixedly connected to the rotating shaft and the top wall of the housing, respectively.

[0011] Preferably, the vertical pipe is provided with a storage chamber and a spray assembly. The storage chamber is used to store antioxidants, and the spray assembly is used to spray antioxidants onto the battery mounting rack.

[0012] Preferably, the inner cavity of the vertical tube is fixed with an upper partition and a lower partition, the storage cavity is located between the upper partition and the lower partition, and a first one-way valve is provided on the lower partition.

[0013] Preferably, the spray assembly includes a secondary electric push rod and a spray pipe. The secondary electric push rod is fixed to the bottom end of the vertical pipe and inserted into the vertical pipe. A piston is fixed to the output end of the secondary electric push rod. The spray pipe is fixed to the outer wall of the vertical pipe and has multiple nozzles on its surface. The end of the spray pipe penetrates the side wall of the vertical pipe and communicates with the lower part of the storage chamber. A second one-way valve is installed at the connection between the spray pipe and the side wall of the vertical pipe.

[0014] The present invention also discloses an energy storage method for a solar photovoltaic system, which uses the aforementioned photovoltaic energy storage cabinet.

[0015] Compared with the prior art, the present invention provides a photovoltaic energy storage cabinet and an energy storage method for a solar photovoltaic system, which has the following beneficial effects: 1. This type of photovoltaic energy storage cabinet and energy storage method for solar photovoltaic systems, by setting up a cavity, a movable battery mounting rack, a drive component, and an isolation component, when a fire occurs, the drive component first pushes the battery mounting racks on both sides of the fire source away from the fire source, and then the fireproof cloth is unfolded and isolated on both sides of the fire source, which can effectively prevent the fire from spreading to both sides, thereby reducing losses. Finally, the fire source is extinguished by an automatic fire extinguisher. Since the battery mounting rack is in a smaller space after being isolated by the fireproof cloth, the dispersion range of the extinguishing agent is smaller, and the extinguishing efficiency is higher.

[0016] 2. This type of photovoltaic energy storage cabinet and energy storage method for solar photovoltaic systems improves the ability to respond to fires and the efficiency of fire handling compared with existing technologies. It also has low space requirements and can still ensure the compactness of the battery, thereby ensuring the energy storage capacity of the energy storage cabinet.

[0017] 3. This type of photovoltaic energy storage cabinet and energy storage method for solar photovoltaic systems, by setting a storage chamber and spraying components on the vertical pipe, together with the drive components, can spray anti-oxidant onto the terminals on the battery assembly rack, thereby improving the anti-oxidation performance of the terminals, making it easier to replace manual maintenance work in compact spaces, and more efficient. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the box body of the present invention; Figure 2 This is a cross-sectional view of the housing of the present invention; Figure 3 This is a schematic diagram of the operation of the driving component of the present invention; Figure 4 This is a schematic diagram of the structure of the strip plate of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of part A; Figure 6This is an exploded view of the casing structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of part B; Figure 8 This is a schematic diagram of the working process of the fireproof cloth of the present invention; Figure 9 This is a cross-sectional view of the vertical tube of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of part C.

[0019] In the diagram: 1. Housing; 2. Energy storage compartment; 3. Battery mounting rack; 31. Notch; 4. Automatic fire extinguisher; 5. Residual cavity; 6. Guide rail; 7. Roller; 8. Isolation assembly; 81. Fireproof cloth; 82. Vertical plate; 83. Housing; 84. Vertical strip hole; 85. Rotating shaft; 86. Vertical tube; 87. Scroll spring; 9. Drive assembly; 91. Longitudinal slide; 92. Longitudinal slide block; 93. Transverse slide; 94. Transverse slide block; 95. Strip Shaped plate; 951, horizontal strip hole; 96, vertical rod; 97, main electric push rod; 98, insert shaft; 99, pusher; 991, motor; 992, disc; 993, connecting rod; 994, slider; 10, storage chamber; 11, spray assembly; 111, auxiliary electric push rod; 112, spray pipe; 113, piston; 114, nozzle; 115, second one-way valve; 12, upper partition; 13, lower partition; 14, first one-way valve. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a photovoltaic energy storage cabinet and an energy storage method for solar photovoltaic systems.

[0022] Example 1: Please refer to Figures 1-8 A photovoltaic energy storage cabinet includes a housing 1, an energy storage compartment 2 inside the housing 1, multiple battery mounting racks 3 inside the energy storage compartment 2, automatic fire extinguishers 4 on the battery mounting racks 3, a cavity 5 between the battery mounting racks 3 and the inner walls on both sides of the energy storage compartment 2, a guide rail 6 on the bottom wall of the energy storage compartment 2, and rollers 7 extending into the guide rail 6 at the bottom of the battery mounting racks 3. The energy storage compartment 2 also includes an isolation component 8 and a drive component 9. The isolation component 8 is located on one side of the battery assembly rack 3, and the isolation component 8 includes two rolls of fireproof cloth 81; The drive assembly 9 is installed on the top wall inside the energy storage compartment 2. The drive assembly 9 is used to separate the battery mounting rack 3 adjacent to the burning battery. The drive assembly 9 is also used to unfold two rolls of fireproof cloth 81, thereby separating the burning battery. The drive component 9 is also used to move the isolation component 8, forcing the isolation component 8 to move next to the burning battery assembly rack 3. When a fire occurs, the drive component 9 operates, forcing the burning battery assembly rack 3 to separate from the adjacent battery assembly rack 3, and forcing the two rolls of fireproof cloth 81 to unfold and isolate the two sides of the burning battery assembly rack 3. After the battery assembly rack 3 is isolated, the automatic fire extinguisher 4 operates to extinguish the fire in a small area.

[0023] Among them, multiple sets of batteries are fixed on the battery mounting rack 3. In the initial state, the multiple battery mounting racks 3 are tightly fitted together. The width of the cavity 5 between the two sides of the energy storage compartment 2 and the battery mounting rack 3 is set between 20 and 60 cm. The automatic fire extinguisher 4 is existing technology. The principle is to spray fire extinguishing agent after monitoring the high temperature by a temperature sensor. In actual application, the automatic fire extinguisher 4 is fixed in the middle of the battery mounting rack 3. The fireproof cloth 81 is made of basalt fiber material. When in use, when the automatic fire extinguisher 4 on a battery rack 3 detects a fire, the drive assembly 9 operates, forcing the isolation assembly 8 to move to one side of the battery rack 3. Then, the drive assembly 9 pushes the adjacent battery rack 3 away from the fire point. Then, the drive assembly 9 drives the two rolls of fireproof cloth 81 to unfold, so that the fireproof cloth 81 extends to both sides of the burning battery rack 3, isolating the fire source in the small space where the single battery rack 3 is located. Then, the automatic fire extinguisher 4 operates and sprays fire extinguishing agent into the space to extinguish the fire. By setting up a cavity 5, a movable battery mounting rack 3, a drive assembly 9, and an isolation assembly 8, when a fire occurs, the drive assembly 9 first pushes the battery mounting racks 3 on both sides of the fire source away from the fire source. Then, the fireproof cloth 81 is unfolded and isolated on both sides of the fire source, which can effectively prevent the fire from spreading to both sides and thus reduce the loss. Finally, the fire source is extinguished by an automatic fire extinguisher 4. Since the battery mounting rack 3 is in a smaller space after being isolated by the fireproof cloth 81, the extinguishing agent has a smaller dispersion range and higher extinguishing efficiency. It also has low space requirements for the equipment and can still ensure the compactness of the battery, thereby ensuring the energy storage capacity of the energy storage cabinet.

[0024] Example 2: See Figures 3-6Unlike the above embodiments, the battery mounting rack 3 has notches 31 on both sides of its top edge. The drive assembly 9 includes two longitudinal slides 91 fixed to the top wall of the energy storage compartment 2. Longitudinal slide blocks 92 are provided on the two longitudinal slides 91. A transverse slide 93 is fixedly connected between the two longitudinal slide blocks 92. A transverse slide block 94 is provided on the transverse slide 93. A strip plate 95 is provided below the transverse slide block 94. A vertical rod 96 is fixed between the strip plate 95 and the transverse slide block 94. Two vertically downward-facing main electric push rods 97 are mounted on the surface of the strip plate 95. A shaft 98 is fixed to the output end of each main electric push rod 97. The strip plate 95 has a pusher 99 on its surface for driving two main electric push rods 97 to move in opposite directions. The strip plate 95 has a horizontal strip hole 951 on its surface. The pusher 99 includes a motor 991 fixed to the bottom of a horizontal slide block 94. The output shaft of the motor 991 is fixed to a disk 992. The surface of the disk 992 has two connecting rods 993 arranged in a ring array. One end of the connecting rod 993 is rotatably connected to the surface of the disk 992. The other end of the connecting rod 993 is hinged to a slider 994. The slider 994 is slidably connected to the horizontal strip hole 951. The main electric push rod 97 passes through the slider 994 and is fixedly connected to the slider 994.

[0025] The longitudinal slide 91 and the transverse slide 93 are both electric slides, and there are four vertical rods 96. When in use, the longitudinal slide 91 moves and drives the longitudinal slide 92 to move, which in turn drives the transverse slide 93, the transverse slide 94, and the strip plate 95 to move, so that the strip plate 95 moves just above the battery mounting rack 3 that is on fire. Then, the main electric push rod 97 moves and drives the insertion shaft 98 to move down, so that the insertion shaft 98 is just inserted into the recess 31. Finally, the motor 991 is started. The motor 991 drives the disc 992 to rotate at a certain angle. When the disc 992 rotates, it drives one end of the connecting rod 993 to move. The other end of the connecting rod 993 pushes the slider 994 to slide. When the slider 994 slides, it drives the electric push rod and the insertion shaft 98 to move, and then the insertion shaft 98 pushes the inner wall of the recess 31, pushing the adjacent battery mounting racks 3 on both sides of the fire source away from the fire source. By setting up the drive component 9, when a fire occurs, the battery mounting brackets 3 on both sides of the fire source are pushed towards the cavity 5 immediately, so that they are away from the fire source, thereby reducing the probability of the fire spreading and reducing losses.

[0026] Example 3, see Figures 6-8 Unlike the above embodiments, the isolation assembly 8 also includes a vertical plate 82 located on one side of the battery assembly rack 3. The top of the vertical plate 82 is fixedly connected to the horizontal slide table 93, and two rolls of fireproof cloth 81 are symmetrically installed on the surface of the vertical plate 82.

[0027] When a fire occurs, the horizontal slide 93 moves above the battery assembly rack 3 where the fire occurred, while the vertical plate 82 moves with the horizontal slide 93 to the side of the battery assembly rack 3, so that the two protective cloths face the gaps on both sides of the battery assembly rack 3, so that the protective cloths can be subsequently driven to unfold. By setting up the drive component 9, when the drive component 9 is running, it can also move the isolation component 8 to the side of the fire source so as to isolate the fire source later.

[0028] Example 4, see Figures 6-8 Unlike the above embodiments, two symmetrically distributed shells 83 are installed on the vertical plate 82. The surface of the shell 83 has vertical strip holes 84. A rotating shaft 85 is rotatably connected inside the shell 83. The fireproof cloth 81 is wound around the rotating shaft 85. One inner end of the fireproof cloth 81 is fixed to the rotating shaft 85, and the outer end of the fireproof cloth 81 extends to the outside of the shell 83 through the vertical strip holes 84. A vertical tube 86 is fixed to the outer end of the fireproof cloth 81 located outside the shell 83. The inner diameter of the vertical tube 86 is larger than the diameter of the insertion shaft 98. The top end of the rotating shaft 85 extends to the outside of the shell 83. A spiral spring 87 is sleeved on the top end of the rotating shaft 85. The inner and outer ends of the spiral spring 87 are fixedly connected to the rotating shaft 85 and the top wall of the shell 83, respectively.

[0029] In this process, the spiral spring 87 is in a deformed state. The elastic force of the spiral spring 87 causes the fireproof cloth 81 to be rolled up on the rotating shaft 85, and the vertical tube 86 is close to the outside of the vertical strip hole 84. When in use, after the drive assembly 9 drives the battery mounting brackets 3 on both sides of the fire source away from the fire source, the horizontal slide table 93 operates, causing the horizontal slide block 94 to move. When the horizontal slide block 94 moves, it drives the strip plate 95, the main electric push rod 97 and the insertion shaft 98 to move towards the vertical plate 82. Finally, the insertion shaft 98 moves just above the vertical tube 86. At this time, the main electric push rod 97 is controlled to extend, so that the insertion shaft 98 is inserted into the vertical tube 86. Then, the horizontal slide table 93 is started again, causing the horizontal slide block 94 to move in the opposite direction, driving the insertion shaft 98 to move in the opposite direction. The insertion shaft 98 then drives the vertical tube 86 to move. When the vertical tube 86 moves, it pulls the rolled-up fireproof cloth 81, causing the fireproof cloth 81 to unfold and extend into the gap on both sides of the fire source. Finally, after the two fireproof cloths 81 unfold, they isolate the fire source in the middle. By setting up the drive component 9 and the isolation component 8, when the drive component 9 is in operation, it can unfold the two sets of rolled-up fireproof cloth 81 and extend them to both sides of the fire source. The heat insulation performance of the fireproof cloth 81 reduces the damage of the fire source to the battery mounting racks 3 on both sides, further reducing the probability of fire spread. It can also wrap the fire source in a smaller space, making the fire extinguishing efficiency higher when the automatic fire extinguisher 4 is in operation, thus improving the fire extinguishing success rate.

[0030] Example 5, see Figures 8-10Unlike the above embodiments, the vertical pipe 86 is provided with a storage chamber 10 and a spray assembly 11. The storage chamber 10 is used to store antioxidants, and the spray assembly 11 is used to spray antioxidants onto the battery mounting frame 3. An upper partition 12 and a lower partition 13 are fixed inside the vertical pipe 86. The storage chamber 10 is located between the upper partition 12 and the lower partition 13. A first one-way valve 14 is provided on the lower partition 13. The spray assembly 11 includes an auxiliary electric pusher. The auxiliary electric push rod 111 is fixed to the bottom end of the vertical tube 86 and inserted into the vertical tube 86. A piston 113 is fixed to the output end of the auxiliary electric push rod 111. The spray pipe 112 is fixed to the outer wall of the vertical tube 86 and has multiple nozzles 114 on its surface. The end of the spray pipe 112 penetrates the side wall of the vertical tube 86 and communicates with the lower part of the storage cavity 10. A second one-way valve 115 is installed at the connection between the spray pipe 112 and the side wall of the vertical tube 86.

[0031] The height of nozzle 114 matches the height of the terminals on the battery mounting rack 3. The first one-way valve 14 only allows the medium to enter the bottom of the lower partition 13 from the storage chamber 10, and the second one-way valve 115 only allows the medium to enter the spray pipe 112 from the inside of the vertical pipe 86. In actual application, if it is necessary to maintain the terminals of each battery mounting rack 3, the narrow space is not suitable for manual operation. At this time, the drive assembly 9 is activated, which in turn activates the vertical pipe 86 to move, so that the vertical pipe 86 passes the side of the battery mounting rack 3. When the nozzle 114 on the vertical pipe 86 is directly facing the terminals on the battery mounting rack 3, the auxiliary electric push rod 111 is activated. When the auxiliary electric push rod 111 retracts, it drives the piston 113 to move down and suck out the antioxidant in the storage chamber 10. When the auxiliary electric push rod 111 extends, it drives the piston 113 to move up and squeeze the antioxidant into the spray pipe 112, and then spray it onto the terminals from the nozzle 114. By setting a storage cavity 10 and a spraying assembly 11 on the vertical pipe 86, and in conjunction with the drive assembly 9, an anti-oxidant can be sprayed onto the terminals on the battery mounting rack 3, thereby improving the anti-oxidation performance of the terminals. This makes it easier to replace manual maintenance work in a compact space, making it more efficient.

[0032] Example 6: An energy storage method for a solar photovoltaic system, wherein the energy storage method for a solar photovoltaic system uses a photovoltaic energy storage cabinet as described in the above examples.

[0033] 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. A photovoltaic energy storage cabinet, characterized in that: The device includes a housing, inside which is an energy storage compartment. Inside the energy storage compartment are multiple battery mounting racks, each equipped with an automatic fire extinguisher. There are cavities between the battery mounting racks and the inner walls of the energy storage compartment on both sides. A guide rail is installed on the bottom wall of the energy storage compartment, and rollers extending from the bottom of the battery mounting racks into the guide rails. The energy storage compartment also contains an isolation component and a drive component. The isolation component, located on one side of the battery mounting racks, consists of two rolls of fireproof cloth. The drive component, installed on the top wall of the energy storage compartment, is used to separate the battery mounting racks adjacent to the burning battery. It also unfolds the two rolls of fireproof cloth to further separate the burning battery. Furthermore, the drive component moves the isolation component, forcing it to move next to the burning battery mounting rack. In the event of a fire, the drive component operates, forcing the burning battery mounting rack to separate from adjacent battery mounting racks and forcing the two rolls of fireproof cloth to unfold and isolate the two sides of the burning battery mounting rack. Once the battery mounting rack is isolated, the automatic fire extinguishers activate to extinguish the fire in a small area. The battery assembly rack has notches on both sides of its top edge. The drive assembly includes two longitudinal electric slides fixed to the top wall of the energy storage compartment. Each longitudinal slide has a longitudinal slide block. A transverse electric slide is fixedly connected between the two longitudinal slide blocks. A transverse slide block is also provided on the transverse slide block. A strip plate is provided below the transverse slide block. A vertical rod is fixed between the strip plate and the transverse slide block. Two vertically downward main electric push rods are mounted on the surface of the strip plate. A shaft is fixed to the output end of each main electric push rod. A pusher for driving the two main electric push rods to move in opposite directions is provided on the surface of the strip plate. A horizontal strip hole is provided on the surface of the strip plate. The pusher includes a motor fixed to the bottom of the transverse slide block. A disk is fixed to the output shaft of the motor. Two connecting rods are arranged in a ring array on the surface of the disk. One end of the connecting rod is rotatably connected to the surface of the disk. The other end of the connecting rod is hinged to a slider. The slider is slidably connected to the horizontal strip hole. The main electric push rod passes through the slider and is fixedly connected to the slider. The isolation assembly also includes a vertical plate located on one side of the battery assembly rack. The top of the vertical plate is fixedly connected to a horizontal slide. Two rolls of fireproof cloth are symmetrically installed on the surface of the vertical plate. Two symmetrically distributed housings are installed on the vertical plate. Vertical strip holes are opened on the surface of the housings. A rotating shaft is rotatably connected inside the housings. The fireproof cloth is wound on the rotating shaft. One end of the fireproof cloth is fixed to the rotating shaft, and the other end of the fireproof cloth extends to the outside of the housing through the vertical strip holes. A vertical tube is fixed to the end of the fireproof cloth outside the housing. The inner diameter of the vertical tube is larger than the diameter of the shaft.

2. The photovoltaic energy storage cabinet according to claim 1, characterized in that: The top of the rotating shaft extends to the outside of the housing, and a spiral spring is fitted on the top of the rotating shaft. The inner and outer ends of the spiral spring are fixedly connected to the rotating shaft and the top wall of the housing, respectively.

3. A photovoltaic energy storage cabinet according to claim 2, characterized in that: The vertical tube is equipped with a storage chamber and a spray assembly. The storage chamber is used to store antioxidants, and the spray assembly is used to spray antioxidants onto the battery mounting rack.

4. A photovoltaic energy storage cabinet according to claim 3, characterized in that: The inner cavity of the vertical tube is fixed with an upper partition and a lower partition, and the storage cavity is located between the upper partition and the lower partition. A first one-way valve is installed on the lower partition.

5. A photovoltaic energy storage cabinet according to claim 4, characterized in that: The spray assembly includes a secondary electric push rod and a spray pipe. The secondary electric push rod is fixed at the bottom of the vertical pipe and inserted into the vertical pipe. A piston is fixed at the output end of the secondary electric push rod. The spray pipe is fixed to the outer wall of the vertical pipe and has multiple nozzles on its surface. The end of the spray pipe passes through the side wall of the vertical pipe and communicates with the lower part of the storage chamber. A second one-way valve is installed at the connection between the spray pipe and the side wall of the vertical pipe.

6. An energy storage method for a solar photovoltaic system, characterized in that: This energy storage method for solar photovoltaic systems uses a photovoltaic energy storage cabinet as described in any one of claims 1-5.

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