Explosion venting device, energy storage cabinet and energy storage system

Abstract

The utility model provides a kind of explosion venting device, energy storage cabinet and energy storage system.The energy storage cabinet has energy storage cabinet board, the energy storage cabinet board is provided with explosion venting port, the explosion venting device includes: exhaust component, including fan and exhaust passage, the fan is used to be discharged to outside by the exhaust passage with the combustible gas in the energy storage cabinet;Explosion venting component, including explosion venting board, the explosion venting board can be at least partially separatedly cover on the explosion venting port, it can be opened by combustible gas when the combustible gas pressure in the energy storage cabinet is higher than predetermined value and at least partially separated with the energy storage cabinet board.According to the explosion venting device of the utility model, both can actively discharge the combustible gas generated after heat runaway to reduce the risk of cabinet explosion, and can open explosion venting board by using shock wave to vent when explosion occurs.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage technology, and more specifically, to an explosion relief device, an energy storage cabinet, and an energy storage system. Background Technology

[0002] Energy storage cabinets are the basic energy storage units in power systems, mainly used for grid peak shaving and frequency regulation, supporting new energy power generation, and industrial and commercial backup power.

[0003] With the widespread adoption of high-energy-density batteries (such as ternary lithium and lithium iron phosphate), the energy capacity of energy storage cabinets is increasing. Under thermal runaway conditions, batteries continuously generate large amounts of flammable gases, causing a rapid increase in pressure inside the energy storage cabinet, ultimately leading to an explosion. To prevent the explosion shockwave and solid particles from damaging the surrounding environment and the internal structure of the cabinet, a venting device is needed for directional venting to release the pressure inside the cabinet.

[0004] The current explosion venting device consists of an explosion vent plate installed on the top of the energy storage cabinet. This explosion vent plate is fixed at the explosion vent on the top of the energy storage cabinet, and a weak cutting zone is set at the edge of the explosion vent plate. When thermal runaway occurs, the pressure inside the energy storage cabinet reaches the opening pressure value of the explosion vent plate, and the explosion vent plate will be torn open in the weak zone. After the explosion vent plate opens, it can reduce the harm of the explosion shock wave and solid particles.

[0005] However, existing explosion relief panels are for single use and need to be replaced after each use. Furthermore, these panels only provide passive protection after an explosion has occurred; they cannot release flammable gases in the early stages of thermal runaway to reduce the risk of cabinet explosion. Utility Model Content

[0006] One objective of this invention is to provide a venting device that can actively discharge the generated combustible gas after thermal runaway to reduce the risk of cabinet explosion, and can also use the shock wave to open the explosion relief plate to vent the explosion in the event of an explosion.

[0007] Another objective of this invention is to provide a venting device that can reduce the shock wave generated by an explosion.

[0008] Another objective of this invention is to provide a venting device with a reusable venting plate.

[0009] Another objective of this invention is to provide a venting device that can extend the venting time during an explosion.

[0010] According to one aspect of the present invention, a venting device for an energy storage cabinet is provided. The energy storage cabinet has an energy storage cabinet panel, and the energy storage cabinet panel is provided with a venting port. The venting device includes: an exhaust assembly, including a fan and an exhaust channel, wherein the fan is used to exhaust combustible gas inside the energy storage cabinet to the outside through the exhaust channel; and a venting assembly, including a venting plate, wherein the venting plate is at least partially detachable from the venting port and can be pushed open by the combustible gas inside the energy storage cabinet when the pressure of the combustible gas is higher than a predetermined value, thereby at least partially separating from the energy storage cabinet panel.

[0011] Optionally, the explosion relief assembly further includes a reset component, one end of which is fixed to the energy storage cabinet plate and the other end of which is fixed to the explosion relief plate. The reset component enables the explosion relief plate to reset after the explosion is vented.

[0012] Optionally, the reset component includes a hydraulic guide rod, one end of which is fixed to the energy storage cabinet plate, and the other end of which is fixed to the explosion relief plate.

[0013] Optionally, the reset component includes an elastic connector, one end of which is fixed to the energy storage cabinet plate, and the other end of which is fixed to the explosion relief plate.

[0014] Optionally, the exhaust passage is closed when thermal runaway does not occur and open when thermal runaway occurs.

[0015] Optionally, the fan includes an air outlet and a cover plate that matches the air outlet, the cover plate being able to close the air outlet when the fan is off and open the air outlet when the fan is on.

[0016] Optionally, the energy storage cabinet plate is further provided with an air inlet, and the explosion relief device further includes an explosion relief exhaust box. The explosion relief exhaust box is fixed to the energy storage cabinet plate around the air inlet and the explosion relief outlet. The explosion relief exhaust box is provided with an exhaust outlet. The exhaust outlet, the air outlet and the air inlet are connected to form the exhaust channel. When the explosion relief plate and the energy storage cabinet plate are at least partially separated, the exhaust outlet is connected to the explosion relief outlet through the air outlet.

[0017] Optionally, the exhaust port is located at the top or side of the explosion venting box, and the fan is fixed inside the explosion venting box.

[0018] Optionally, the explosion relief device further includes a sensor disposed inside the explosion relief exhaust box, the sensor including a gas sensor, the sensor being wired or wirelessly connected to the controller, and the fan being wired or wirelessly connected to the controller.

[0019] Optionally, the explosion venting housing further includes a support plate, which is fixed to the inner wall of the explosion venting housing and is used to support the fan and the sensor.

[0020] Optionally, the explosion venting assembly further includes a flexible pad disposed between the explosion venting plate and the energy storage cabinet plate around the explosion vent.

[0021] According to another aspect of the present invention, an energy storage cabinet is provided, the energy storage cabinet including the explosion relief device as described above.

[0022] According to another aspect of the present invention, an energy storage system is provided, the energy storage system including the energy storage cabinet as described above.

[0023] The explosion relief device of this utility model can not only actively discharge the generated flammable gas after thermal runaway to reduce the risk of cabinet explosion, but also use the shock wave to open the explosion relief plate to relieve the explosion in the event of an explosion.

[0024] According to the explosion relief device of this utility model, when the energy storage cabinet explodes, the explosion shock wave is used to push open the explosion relief plate, which can consume some energy and thus reduce the impact of the explosion shock wave on the surrounding environment.

[0025] According to the explosion relief device of this utility model, the reset component can reset the explosion relief plate after the explosion is released, so the explosion relief plate can be reused and automatically fall back.

[0026] According to the explosion relief device of this utility model, the delay effect generated by the slow fall of the hydraulic guide rod can effectively increase the ventilation area and prolong the exhaust time during the explosion process. Attached Figure Description

[0027] Figure 1 This is a perspective view of a venting device according to an embodiment of the present invention.

[0028] Figure 2 It is Figure 1 A three-dimensional view of the explosion venting device after the cover plate has been removed.

[0029] Figure 3 It is along Figure 1 The cross-sectional view taken along line A-A' shows the explosion vent plate in the closed state.

[0030] Figure 4 It is along Figure 2 The cross-sectional view taken at B-B' shows the explosion vent plate in the open state.

[0031] Figure 5 This is a schematic diagram of an energy storage cabinet panel according to an embodiment of the present utility model.

[0032] Figure 6 This is a schematic diagram of the fan in the on state according to an embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of the fan in the off state according to an embodiment of the present invention.

[0034] Figure 8 This is a schematic diagram of a venting plate according to an embodiment of the present invention.

[0035] Figure 9 This is a schematic diagram of a flexible pad according to an embodiment of the present invention.

[0036] Label Name: 1-Energy Storage Cabinet Panel, 10-Exhaust Assembly, 11-Fan, 11a-Cover Plate, 11b-Outlet, 12-Exhaust Channel, 12a-Inlet, 12b-Exhaust Port, 1a-Explosion Relief Port, 20-Explosion Relief Assembly, 21-Explosion Relief Plate, 21a-Mounting Hole, 21b-Slot, 22-Hydraulic Guide Rod, 23-Flexible Pad, 30-Explosion Relief Exhaust Box, 31-Support Frame, 32-Cover Plate, 33-Support Plate, 40-Sensor. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0039] The following will refer to Figures 1 to 8 This invention describes an explosion relief device, an energy storage cabinet, and a new energy power generation system according to embodiments of the present invention.

[0040] Figure 1 This is a perspective view of a venting device according to an embodiment of the present invention. Figure 2 It is Figure 1 A three-dimensional view of the explosion venting device after the cover plate has been removed. Figure 3 It is along Figure 1 The sectional view taken from line A-A'. Figure 4 It is along Figure 2 The sectional view taken by B-B' in the figure. Figure 5 This is a schematic diagram of an energy storage cabinet panel according to an embodiment of the present utility model. Figure 6 This is a schematic diagram of the fan in the on state according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the fan in the off state according to an embodiment of the present invention. Figure 8 This is a schematic diagram of a venting plate according to an embodiment of the present invention. Figure 9 This is a schematic diagram of a flexible pad according to an embodiment of the present invention.

[0041] like Figures 1 to 4 As shown, this utility model provides an explosion venting device for an energy storage cabinet. The energy storage cabinet has an energy storage cabinet plate 1, and the energy storage cabinet plate 1 is provided with an explosion vent 1a. It should be understood that the energy storage cabinet plate 1 in this article can refer to the plate installed on the top plate, side plate, or bottom plate of the energy storage cabinet, and this utility model does not make a specific limitation in this regard. That is to say, the energy storage cabinet plate 1 in this article refers to the plate of the energy storage cabinet provided with the explosion vent 1a. In addition, as needed, a recycling device can be installed near the energy storage cabinet plate 1 to prevent impact on the surrounding environment.

[0042] like Figures 1 to 4 As shown, the explosion relief device according to an embodiment of the present invention may include: an exhaust assembly 10, including a fan 11 and an exhaust channel 12, wherein the fan 11 is used to discharge combustible gas in the energy storage cabinet to the outside through the exhaust channel 12; and an explosion relief assembly 20, including an explosion relief plate 21, which can be at least partially detached from the explosion relief port 1a and can be pushed open by the combustible gas in the energy storage cabinet when the pressure of the combustible gas in the energy storage cabinet is higher than a predetermined value, thereby separating it at least partially from the energy storage cabinet plate 1.

[0043] According to this invention, by separately providing an exhaust component 10 from the explosion relief component 20, the combustible gas generated after thermal runaway is discharged. When the thermal runaway phenomenon is minor, it can prevent the accumulation of combustible gas leading to a surge in pressure and an explosion. In addition, according to this invention, by providing an explosion relief component 20 including an explosion relief plate 21, and making the explosion relief plate 21 at least partially separable from the explosion relief port 1a, when the energy storage cabinet explodes (at this time, the pressure of the combustible gas in the energy storage cabinet is higher than a predetermined value, i.e., an explosion occurs), the combustible gas in the energy storage cabinet pushes open the explosion relief plate 21, and the explosion relief plate 21 is at least partially separated from the energy storage cabinet plate 1 for directional explosion relief, reducing the impact force of the explosion and the harm of solid particles. The explosion relief effect is good and the safety performance is high.

[0044] According to this utility model, in the early stage of thermal runaway, the exhaust assembly 10 is used to exhaust the gas. At this time, the explosion relief plate 21 is not opened. When the energy storage cabinet explodes, the explosion shock wave is used to open the explosion relief plate that can be at least partially separated from the explosion relief port 1a to perform explosion relief work. The kinetic energy of the explosion shock wave is converted into the potential energy of the explosion relief plate 21, which can consume some energy and reduce the impact of the explosion shock wave on the surrounding environment.

[0045] The following describes in detail the exhaust assembly 10 and the explosion relief assembly 20 according to embodiments of the present invention.

[0046] like Figure 3 The exhaust assembly 10 may include a fan 11 and an exhaust passage 12. The fan 11 may be an axial flow fan, a centrifugal fan, etc., and this utility model does not impose specific limitations on it.

[0047] According to an embodiment of the present invention, the fan 11 can be installed on the outside of the energy storage cabinet. Compared with installing it inside the energy storage cabinet, this can save space and avoid the possibility of explosion caused by sparking when the fan is turned on.

[0048] According to an embodiment of the present invention, the exhaust channel 12 can be in a closed state when thermal runaway does not occur, and in a closed state when thermal runaway occurs. Therefore, when thermal runaway does not occur, the exhaust channel 12 can be in a closed state, which helps to ensure the sealing level of the energy storage cabinet, and when thermal runaway occurs, the exhaust assembly 10 can discharge combustible gas through the exhaust channel 12.

[0049] According to embodiments of the present invention, such as Figure 6 As shown, the fan 11 may include an air outlet 11b and a cover plate 11a that matches the air outlet 11b. The cover plate 11a is capable of closing the air outlet 11b when the fan 11 is turned off (e.g., Figure 7 (as shown), and can open the air outlet 11b when the fan 11 starts (as shown). Figure 6 (As shown). As an example, a portion (e.g., one side) of the cover plate 11a may be hinged to the outer edge plate of the fan 11. Therefore, in the event of thermal runaway, the cover plate 11a may be pushed open by the gas under the action of the fan 11, thereby opening the exhaust passage. However, the connection method of the cover plate 11a is not limited to this, as long as it can open the exhaust port 11b when the fan 11 starts and close the exhaust port 11b when the fan 11 stops.

[0050] According to an embodiment of this utility model, the energy storage cabinet 1 may also be provided with an air inlet 12a. For example... Figures 3 to 5As shown, the air inlet 12a is formed around the explosion vent 1a on the energy storage cabinet plate 1. According to an embodiment of this utility model, the explosion venting device further includes an explosion venting exhaust box 30, which is fixed to the energy storage cabinet plate 1 around the air inlet 12a and the explosion vent 1a. An exhaust port 12b may be provided on the explosion venting exhaust box 30. The exhaust port 12b, the outlet 11b, and the air inlet 12a are connected to form an exhaust channel 12, and the exhaust port 12b is connected to the explosion vent 1a through the outlet 11b when the explosion venting plate 21 is at least partially separated from the energy storage cabinet plate 1. The fan 11 can be fixed inside the explosion venting exhaust box 30, so that in the early stage of thermal runaway, the fan 11 can be started to discharge the combustible gas inside the energy storage cabinet through the exhaust channel 12, so as to avoid explosion as much as possible.

[0051] As an example, the explosion vent housing 30 may include a support frame 31 and a cover plate 32 covering the support frame 31, and the vent 12b may be located on the side wall of the support frame 31 or the cover plate 32. Figure 1 As shown, the exhaust port 12b can be disposed on the four side walls of the support frame 31. As an example, the explosion venting enclosure (30) may also include a support plate 33, which is fixed to the side wall of the support frame 31 within the explosion venting enclosure 30. The support plate 33 can be used to support the fan 11. For example, the fan 11 can be fixed to the support plate 33 (e.g., the outer edge of the fan 11 can be fixed to the mounting port of the support plate 33). In this case, when exhaust is performed through the exhaust assembly 10, the combustible gas inside the energy storage cabinet is discharged through the air inlet 12a, the fan 11, and the exhaust port 12b under the action of the fan 11.

[0052] According to an embodiment of this utility model, the explosion relief device may further include a sensor 40 disposed within the explosion relief exhaust box 30, the sensor 40 including a gas sensor. The sensor 40 can be wired or wirelessly connected to the controller, and the fan 11 can be wired or wirelessly connected to the controller. The gas sensor can detect smoke concentration, such as hydrogen concentration, to determine whether thermal runaway has occurred, and then transmit the signal to the controller via wired or wireless means. If thermal runaway occurs, the controller will control the fan 11 to start exhausting. Since most of the combustible gas generated by thermal runaway accumulates at the top of the energy storage cabinet, by installing the sensor 40 within the explosion relief exhaust box 30, the combustible gas concentration can be detected earlier, improving safe operation efficiency. As an example, the gas sensor can be fixed to the side of the support plate 33 facing the energy storage cabinet plate 1. The number of sensors 40 is not specifically limited and can be one, two, three, or more. For example, four sensors are arranged at four locations along the outer perimeter of the support plate 33 in the drawings; however, the number of sensors is not specifically limited, as long as they can detect changes in gas concentration.

[0053] According to an embodiment of this utility model, the explosion relief component 20 may include an explosion relief plate 21, which may be at least partially detachably covered on the explosion relief port 1a, thereby enabling it to open in the event of an explosion in the energy storage cabinet. That is, although venting is performed using the venting component 10, an explosion may still occur if the sensor 40 is damaged or thermal runaway is severe. In this case, the explosion relief component 20 can be used for directional explosion relief. During explosion relief, the blast shock wave will push open the explosion relief plate 21 for directional venting. For example, the shock wave or solid particles can be discharged along the explosion relief port 1a through the outlet 11b and the exhaust port 12b. Since the explosion relief device of this utility model is used in an explosion scenario, the explosion relief venting box 30, the fan 11, and the structure of the explosion relief venting box 30 and the energy storage cabinet plate 1, as well as the connections between these structures, are all required to meet explosion-proof standards, so that the blast shock wave during explosion relief will not damage the explosion relief venting box 30 and the fan 11.

[0054] According to an embodiment of the present invention, the explosion venting assembly 20 may further include a reset component. One end of the reset component is fixed to the energy storage cabinet plate 1, and the other end of the reset component is fixed to the explosion venting plate 21. The reset component enables the explosion venting plate 21 to reset after explosion venting. Since the reset component according to the present invention enables the explosion venting plate 21 to reset after explosion venting, the explosion venting plate 21 can be reused and automatically falls back down.

[0055] According to an embodiment of the present invention, the reset component may include a hydraulic guide rod 22, one end of which may be fixed to the top plate of the energy storage cabinet, and the other end of which may be fixed to the explosion relief plate 21.

[0056] As an example, the energy storage cabinet panel 1 can be the top panel of the energy storage cabinet, and four hydraulic guide rods 22 can be installed at the four corners of the explosion relief plate 21. Figure 7 The diagram shows four mounting holes 21a at the four corners of the explosion relief plate 21 for connecting to the top of the hydraulic guide rod 22. However, the number and position of the hydraulic guide rods 22 are not specifically limited, as long as they can stably support the explosion relief plate 21.

[0057] in addition, Figure 4The diagram shows the explosion relief plate 21 fully open; however, it can also be opened on three sides. In this case, two hydraulic guide rods 22 can be installed on only two sides of the explosion relief plate 21, allowing the plate to rotate open or close in a side-opening manner. When an explosion occurs, the hydraulic guide rods 22 rise and push open the explosion relief plate 21 to release the explosion under the force of the blast wave. After the instantaneous impact, the hydraulic guide rods 22 slowly fall back under the gravity of the explosion relief plate 21. Due to the delay effect of the slow fall of the hydraulic guide rods 22, compared to the direct fall of the explosion relief plate 21, the ventilation area can be effectively increased, quickly expelling flammable gases, fumes from the explosion, and other solid particles. Alternatively, when explosion venting is not required, the explosion relief plate 21 can also be pressed against the explosion vent on the top plate of the energy storage cabinet by gravity.

[0058] The above description refers to the case where the energy storage cabinet plate 1 is the top plate of the energy storage cabinet. However, this utility model is not limited to this. As an example, the energy storage cabinet plate 1 can also be a side plate of the energy storage cabinet. In this case, under the push of the explosion shock wave, the hydraulic guide rod 22 laterally pushes open the explosion relief plate 21 to release the explosion. After the instantaneous impact, the hydraulic guide rod 22 slowly falls back under the gravity of the explosion relief plate 21. The reset component is not limited to the hydraulic guide rod 22 described above. According to another embodiment of this utility model, the reset component may include an elastic connector. One end of the elastic connector is fixed to the energy storage cabinet plate 1, and the other end of the elastic connector is fixed to the explosion relief plate 21. When an explosion occurs, under the action of the explosion shock wave, the explosion relief plate 21 is pushed open to release the explosion, and then reset under the action of the spring restoring force to cover the explosion relief port 1a. The energy storage cabinet plate 1 can be the top plate or the side plate of the energy storage cabinet. When the energy storage cabinet plate 1 is a side plate of the energy storage cabinet, it may be necessary to set up additional support components to support the explosion relief plate 21. For example, a telescopic strut can be provided to support the explosion relief plate 21; however, this invention is not limited to this.

[0059] Furthermore, according to embodiments of this utility model, such as Figure 3 , Figure 4 and Figure 8 As shown, the explosion venting assembly 20 may further include a flexible pad 23, which is disposed around the explosion vent 1a between the explosion venting plate 21 and the energy storage cabinet plate 1. Specifically, as shown... Figure 7 As shown, a groove 21b for accommodating a flexible pad 23 is provided around the outer periphery of the explosion relief plate 21. As an example, the flexible pad 23 can be fixed in the groove 21b and can be opened or closed together with the explosion relief plate 21. As another example, the flexible pad 23 can be fixed to the energy storage cabinet plate 1 around the explosion relief port 1a and can be fitted into the groove 21b after the explosion relief plate 21 falls. According to this invention, by providing the flexible pad 23, the falling explosion relief plate 21 can be cushioned to a certain extent, preventing the explosion relief plate 21 from damaging the energy storage cabinet plate 1.

[0060] According to another embodiment of the present invention, an energy storage cabinet including the explosion relief device as described above can also be provided.

[0061] Furthermore, according to another embodiment of this utility model, a new energy power generation system including the above-mentioned energy storage cabinet can also be provided. The new energy power generation system can be a wind power generation system.

[0062] The explosion relief device according to this utility model can achieve beneficial technical effects, including but not limited to those described below.

[0063] The explosion relief device of this utility model can not only actively discharge the generated flammable gas after thermal runaway to reduce the risk of cabinet explosion, but also use the shock wave to open the explosion relief plate to relieve the explosion in the event of an explosion.

[0064] According to the explosion relief device of this utility model, when the energy storage cabinet explodes, the explosion shock wave is used to push open the explosion relief plate, which can consume some energy and thus reduce the impact of the explosion shock wave on the surrounding environment.

[0065] According to the explosion relief device of this utility model, the reset component can reset the explosion relief plate after the explosion is released, so the explosion relief plate can be reused and automatically fall back.

[0066] According to the explosion relief device of this utility model, the delay effect generated by the slow fall of the hydraulic guide rod can effectively increase the ventilation area and prolong the exhaust time during the explosion process.

[0067] Although exemplary embodiments of the present invention have been specifically described with reference to exemplary embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made thereto without departing from the spirit and scope of the present invention as defined by the claims.

Claims

1. A deflation device for an energy storage cabinet, characterized in that, The energy storage cabinet has an energy storage cabinet plate (1), the energy storage cabinet plate (1) is provided with an explosion vent (1a), and the explosion vent device includes: The exhaust assembly (10) includes a fan (11) and an exhaust passage (12), wherein the fan (11) is used to exhaust combustible gas inside the energy storage cabinet to the outside through the exhaust passage (12); The explosion relief assembly (20) includes an explosion relief plate (21) which can be at least partially separated from the explosion relief port (1a) and can be pushed open by the combustible gas in the energy storage cabinet when the pressure of the combustible gas in the energy storage cabinet is higher than a predetermined value, thus separating it at least partially from the energy storage cabinet plate (1).

2. The explosion relief device for the energy storage cabinet according to claim 1, characterized in that, The explosion relief assembly (20) also includes a reset component, one end of which is fixed to the energy storage cabinet plate (1) and the other end of which is fixed to the explosion relief plate (21). The reset component enables the explosion relief plate (21) to be reset after the explosion is vented.

3. The explosion relief device for the energy storage cabinet according to claim 2, characterized in that, The reset component includes a hydraulic guide rod (22), one end of which is fixed to the energy storage cabinet plate (1), and the other end of which is fixed to the explosion relief plate (21).

4. The explosion relief device for the energy storage cabinet according to claim 2, characterized in that, The reset component includes an elastic connector, one end of which is fixed to the energy storage cabinet plate (1), and the other end of which is fixed to the explosion relief plate (21).

5. The explosion relief device for the energy storage cabinet according to claim 1, characterized in that, The exhaust passage (12) is closed when thermal runaway does not occur and open when thermal runaway occurs.

6. The explosion relief device for the energy storage cabinet according to claim 5, characterized in that, The fan (11) includes an air outlet (11b) and a cover plate (11a) that matches the air outlet (11b). The cover plate (11a) can close the air outlet (11b) when the fan (11) is off and can open the air outlet (11b) when the fan (11) is on.

7. The explosion relief device for the energy storage cabinet according to claim 6, characterized in that, The energy storage cabinet (1) is also provided with an air inlet (12a), and the explosion relief device also includes an explosion relief exhaust box (30). The explosion relief exhaust box (30) is fixed to the energy storage cabinet (1) around the air inlet (12a) and the explosion relief port (1a). The explosion relief exhaust box (30) is provided with an exhaust port (12b). The exhaust port (12b), the air outlet (11b) and the air inlet (12a) are connected to form the exhaust channel (12). When the explosion relief plate (21) is at least partially separated from the energy storage cabinet (1), the exhaust port (12b) is connected to the explosion relief port (1a) through the air outlet (11b).

8. The explosion relief device for the energy storage cabinet according to claim 7, characterized in that, The exhaust port (12b) is located on the top or side of the explosion venting box (30), and the fan (11) is fixed inside the explosion venting box (30).

9. The explosion relief device for the energy storage cabinet according to claim 8, characterized in that, The explosion relief device also includes a sensor (40) installed in the explosion relief exhaust box (30). The sensor (40) includes a gas sensor. The sensor (40) is wired or wirelessly connected to the controller. The fan (11) is wired or wirelessly connected to the controller.

10. The explosion relief device for the energy storage cabinet according to claim 9, characterized in that, The explosion venting box (30) also includes a support plate (33), which is fixed to the inner wall of the explosion venting box (30) and is used to support the fan (11) and the sensor (40).

11. The explosion relief device for the energy storage cabinet according to claim 1, characterized in that, The explosion relief assembly (20) also includes a flexible pad (23), which is disposed around the explosion relief port (1a) between the explosion relief plate (21) and the energy storage cabinet plate (1).

12. An energy storage cabinet, characterized in that, The energy storage cabinet includes an explosion relief device according to any one of claims 1 to 11.

13. An energy storage system, characterized in that, The energy storage system includes the energy storage cabinet according to claim 12.

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