Water-based fire extinguishing device of battery pack for energy storage

Abstract

The utility model relates to the technical field of battery pack fire extinguishing, and provides a water-based fire extinguishing device for an energy storage battery PACK pack, which comprises a fixed seat and a spray head, the fixed seat is provided with a first liquid conveying flow channel and a second liquid conveying flow channel; the spray head is arranged on the fixed seat and comprises a main body part, a main hole part is detachably connected to the top surface of the main body part, a main spray hole is formed in the main hole part, secondary hole parts are detachably connected to two inclined surfaces of the main body part, and secondary spray holes are formed in the secondary hole parts. The spraying holes with different sizes are formed in the main hole part and the secondary hole part, and the main spraying holes and the secondary spraying holes adopt different flows and pressures, so that the battery PACK can be accurately covered under the cooperation of the main spraying holes and the secondary spraying holes, and accurate spraying covering can be realized when a fire extinguishing agent is sprayed; therefore, comprehensive covering fire extinguishing of the energy storage battery PACK can be achieved within the minimum pressure range, effective fire extinguishing can be rapidly achieved, and the use amount of a fire extinguishing agent is saved in a precise covering mode.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack fire extinguishing, in particular to an aqueous fire extinguishing device for an energy storage battery PACK pack. Background Technique

[0002] In the existing energy storage battery system, chemical fire extinguishing agents such as perfluorohexanone gas are usually used to cope with possible fire risks. With the application of gas fire extinguishing agents in new energy fields such as energy storage, it is found that the inhibitory effect of gas fire extinguishing agents on battery thermal runaway is limited, and they will also have a certain impact on the environment and human health during the fire extinguishing process. Therefore, environmentally friendly and safer aqueous fire extinguishing agents have become the main choice for the fire extinguishing systems in the current energy storage field. However, the application of nozzles for aqueous fire extinguishing agents in energy storage PACK packs has not received attention and has not been solved.

[0003] In related technologies, traditional nozzles often have difficulty in accurately spraying aqueous fire extinguishing agents, resulting in ineffective spraying of some fire extinguishing agents and unable to fully meet the requirements of complex fire scenarios, making the fire extinguishing coverage and efficiency poor when dealing with battery fires. Therefore, in addition to nozzles that conform to the characteristics of aqueous fire extinguishing agents, it is also necessary to design more economical nozzles with a wide fire extinguishing coverage. On the premise of ensuring the fire extinguishing effect, the use amount of fire extinguishing agents should be reduced as much as possible, the resource utilization rate should be improved, and the requirements of different fire scenarios should be adapted. Content of the Utility Model

[0004] The utility model provides an aqueous fire extinguishing device for an energy storage battery PACK pack to solve the defect that in the prior art, it is difficult for a nozzle to achieve accurate coverage of a fire extinguishing agent, resulting in poor coverage and fire extinguishing effect.

[0005] The utility model provides an aqueous fire extinguishing device for an energy storage battery PACK pack, including: a fixed seat and a nozzle; the fixed seat has a first liquid delivery channel and a second liquid delivery channel; the nozzle is arranged on the fixed seat, and the nozzle includes a main body part with an isosceles trapezoid structure. A main hole part is detachably connected to the top surface of the main body part, and a main spray hole is opened on the main hole part. Secondary hole parts are detachably connected to the two inclined surfaces at the isosceles positions of the main body part, and secondary spray holes are opened on the secondary hole parts; wherein, the aperture of the main spray hole is larger than that of the secondary spray hole, the main spray hole is communicated with the first liquid delivery channel, the two secondary spray holes are communicated with the second liquid delivery channel, and the liquid pressure and flow rate in the first liquid delivery channel are greater than those in the second liquid delivery channel.

[0006] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, the included angle between the axis line of the main spray hole and the axis line of any one of the secondary spray holes is the same, so that the water mist spraying angles of the main spray hole and the secondary spray holes are both 60 degrees. Among them, the water mist spraying area of the main spray hole is adjacent to the water mist spraying areas of the two secondary spray holes.

[0007] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, a circular first sunken platform is opened at the central position of the top surface of the nozzle. The main hole part is fixedly arranged in the first sunken platform through bolts, and at least a part of the main hole part protrudes from the top surface of the nozzle; circular second sunken platforms are opened on both inclined surfaces at the isosceles position of the main body part, and the secondary hole parts are fixedly arranged in the second sunken platforms through bolts, and at least a part of the secondary hole parts protrudes from the inclined surface of the nozzle.

[0008] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, it further includes an angle adjustment structure. The nozzle is rotatably connected to the fixed seat, and the angle adjustment structure is arranged between the nozzle and the fixed seat to adjust the pitch angle of the nozzle; among them, the angle adjustment structure includes a hydraulic connecting rod. One end of the hydraulic connecting rod is hinged to the nozzle, and the other end of the hydraulic connecting rod is hinged to the fixed seat.

[0009] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, a connecting part is connected to the bottom surface of the nozzle, a rotating shaft is connected to the connecting part, and the rotating shaft is rotatably connected to the fixed seat.

[0010] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, a rotating support seat is arranged at the end of the fixed seat, a rotating hole is opened on the rotating support seat, the rotating shaft is rotatably arranged in the rotating hole, and torsion springs are sleeved on both ends of the rotating shaft.

[0011] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, it further includes a locking mechanism. The locking mechanism is connected to the rotating shaft to realize the locking of the rotating shaft; among them, the locking mechanism includes a connecting base and a hydraulic expansion sleeve. The connecting base is arranged on the fixed seat, the hydraulic expansion sleeve is fixedly connected to the connecting base, and the hydraulic expansion sleeve is sleeved on the rotating shaft.

[0012] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, a hydraulic chamber and an oil return chamber are arranged in the connecting base. Connecting ports are arranged in both the hydraulic chamber and the oil return chamber, and the connecting ports are communicated with the hydraulic connecting rod and the hydraulic expansion sleeve through a communication pipeline.

[0013] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, a pressure relief port is provided on the fixed seat, and a one-way valve is provided at the pressure relief port.

[0014] According to the water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, the liquid flow rate in the first liquid delivery channel is 0.7 L / min - 1.0 L / min, and the liquid pressure in the first liquid delivery channel is 10 Bar - 20 Bar; the liquid flow rate in the second liquid delivery channel is 0.4 L / min; the liquid pressure in the second liquid delivery channel is 10 Bar.

[0015] The water-based fire extinguishing device for the battery PACK for energy storage provided by the present utility model, through the arrangement of spray holes with different sizes on the main hole part and the secondary hole part, and the main spray hole and the secondary spray hole adopting different flow rates and pressures, enables precise coverage of the battery PACK under the cooperation of the main spray hole and the secondary spray hole, so that precise spraying coverage can be achieved during the spraying of the fire extinguishing agent, thereby enabling comprehensive coverage and extinguishing of the battery PACK for energy storage within the smallest pressure range, thus enabling rapid and effective fire extinguishing, and saving the usage amount of the fire extinguishing agent through the way of precise coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is the front view structural schematic diagram of the fire extinguishing device provided by the present utility model.

[0018] Figure 2 It is the partial sectional view structural schematic diagram of the fire extinguishing device provided by the present utility model.

[0019] Figure 3 It is the top view structural schematic diagram of the fire extinguishing device provided by the present utility model.

[0020] Figure 4 It is the right side view structural schematic diagram of the fire extinguishing device provided by the present utility model.

[0021] Figure 5 It is the structural schematic diagram of the specific installation position of the fire extinguishing device provided by the present utility model.

[0022] Reference Signs:

[0023] 10. Fixed seat; 11. First infusion flow channel; 12. Second infusion flow channel; 13. Oil delivery flow channel; 14. Oil return flow channel; 141. Check valve; 15. Rotating support seat; 20. Sprayer head; 21. Main hole part; 211. Main spray hole; 22. Secondary hole part; 221. Secondary spray hole; 23. Connecting part; 24. Rotating shaft; 30. Angle adjustment structure; 40. Locking mechanism; 41. Connecting base; 411. Hydraulic chamber; 412. Oil return chamber; 42. Hydraulic expansion sleeve. Detailed implementation manner

[0024] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0025] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model 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 embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "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. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0027] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0028] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0029] In an energy storage system, in order to achieve "peak shaving and valley filling" of electric power, multiple battery PACKs are often used for energy storage. The battery PACK is usually a rectangular block structure. In order to prevent thermal runaway of the battery, a fire extinguishing device is arranged on one side of the battery PACK to suppress it, so that fire extinguishing operations can be carried out when the battery undergoes thermal runaway.

[0030] In the related art, chemical fire extinguishing agents such as perfluoroketone gas are usually used to deal with possible fire risks as fire extinguishing agents, but it is difficult for these fire extinguishing agents to efficiently handle heat during fire extinguishing, that is, it is difficult to efficiently carry out fire extinguishing operations in a high-temperature environment. The water-based fire extinguishing agent can achieve efficient fire extinguishing in a high-temperature environment, but it is difficult for the water-based fire extinguishing agent to achieve full coverage with a conventional nozzle. Even if full coverage is achieved, it requires a high liquid pressure, flow rate, and precise installation position. In the related art, a large amount of fire extinguishing agent is used to achieve fire extinguishing, which will lead to a large consumption of the water-based fire extinguishing agent, and it is difficult to quickly and accurately extinguish the fire by consuming a large amount of fire extinguishing agent.

[0031] Regarding the problems in the related art, such as Figures 1 - 4As shown in the figure, the present utility model provides an aqueous fire extinguishing device for a battery PACK for energy storage, including a fixed seat 10 and a nozzle 20; the fixed seat 10 has a first liquid infusion channel 11 and a second liquid infusion channel 12; the nozzle 20 is arranged on the fixed seat 10, and the nozzle 20 includes a main body part with an isosceles trapezoid structure. A main hole part 21 is detachably connected to the top surface of the main body part. A main spray hole 211 is formed on the main hole part 21. Two secondary hole parts 22 are detachably connected to the two inclined surfaces of the main body part adjacent to the main hole part 22. A secondary spray hole 221 is formed on the secondary hole part 22; wherein, the aperture of the main spray hole 211 is larger than that of the secondary spray hole 221. The main spray hole 211 is communicated with the first liquid infusion channel 11, and the two secondary spray holes 221 are communicated with the second liquid infusion channel. And the liquid pressure and flow rate in the first liquid infusion channel are greater than the liquid pressure and flow rate in the second liquid infusion channel. When extinguishing a fire on a rectangular block-shaped battery PACK, it is necessary to completely cover the entire battery PACK to accurately and quickly achieve fire extinguishing and cooling operations. In this embodiment, the main spray hole 211 and the two adjacent secondary spray holes 221 cooperate to achieve precise coverage of the entire battery PACK, improve the efficiency of the fire extinguishing operation, and can effectively and timely achieve the fire extinguishing operation.

[0032] The aqueous fire extinguishing device is arranged on one side of a rectangular block-shaped battery PACK. If it is set at too far a distance, a large liquid pressure and flow rate are required to achieve coverage, which is likely to spray a large area onto the objects beside the battery PACK, resulting in a large consumption of the fire extinguishing agent and pollution to other objects. Setting it too far also requires a large installation space. If it is set too close, there will be a problem of incomplete coverage, thus affecting the efficiency and effect of fire extinguishing. In the solution of this embodiment, the main spray hole 211 can cover most of the area in the center of the battery PACK, and the two secondary spray holes 221 on both sides are used to cover the remaining areas on both sides of the battery PACK, so that the fire extinguishing device can be installed at a relatively close distance and can effectively cover the entire battery PACK.

[0033] In a specific implementation manner, as Figure 5 shown, the aqueous fire extinguishing device is installed at the middle position of the battery PACK, so that the main hole part 21 is directly opposite to the central axis position of the battery PACK. A part of the aqueous fire extinguishing agent is ejected from the main spray hole 211 through the first liquid infusion channel. The fire extinguishing agent ejected from the first main spray hole 211 covers most of the area at the far end of the battery PACK, thereby achieving fire extinguishing and cooling of the battery PACK. Another part of the aqueous fire extinguishing agent is ejected from the secondary spray hole 221 through the second liquid infusion channel. The auxiliary spray holes are arranged on the two inclined surfaces of the main body part, so as to be able to cover the areas on both sides of the battery PACK, thereby achieving overall coverage of the battery PACK.

[0034] It can be understood that the main spray hole 211 needs to cover the farthest end of the battery PACK (the position farthest from the water-based fire extinguishing device). The axial distance of the secondary spray hole 221 is less than the axial position that the main spray hole 211 needs to reach. Therefore, the liquid flow rate and pressure in the first liquid delivery channel need to be greater than the fluid flow rate and pressure in the second liquid delivery channel. By setting the diameter of the main spray hole 211 larger than that of the secondary spray hole 221, the area of the water mist coverage area ejected from the main spray hole 211 is larger, achieving precise coverage of the battery PACK.

[0035] In specific applications, the ports of the first liquid delivery channel 11 and the second liquid delivery channel 12 are respectively connected to the main spray hole 211 and the secondary spray hole 221 through pipelines. It can be understood that the pipelines connecting the first liquid delivery channel 11 and the second liquid delivery channel 12 are flexible pipelines.

[0036] For example, when the fire extinguishing device is installed on one side of the battery PACK, the liquid flow rate in the first liquid delivery channel 11 is 0.7 L / min - 1.0 L / min, and the liquid pressure in the first liquid delivery channel 11 is 10 Bar - 20 Bar; the liquid flow rate in the second liquid delivery channel 12 is 0.4 L / min; the liquid pressure in the second liquid delivery channel 12 is 10 Bar. By limiting the fluid flow rate and pressure in the first liquid delivery channel 11, the fire extinguishing agent ejected through the main spray hole 211 can reach the farthest position of the battery PACK and cover most of the positions on the axis of the battery PACK. The limitation of the flow rate and pressure in the second liquid delivery channel 12 causes most of the fire extinguishing agent ejected through the secondary spray hole 221 to be sprayed onto the areas on both sides of the proximal end of the PACK, thereby achieving complete coverage of the battery PACK through the cooperation of the main spray hole 211 and the secondary spray hole 221.

[0037] It can be understood that the main spray hole 211 can reach the distal position with a large flow rate and large pressure (relative to the secondary spray hole 221), achieving most of the coverage of the battery PACK. The secondary spray hole 221 can effectively supplement the fire extinguishing agent for the remaining area with a small flow rate and small pressure, thereby achieving precise spraying and precise coverage, enabling it to achieve full coverage and extinguishing of the energy storage battery PACK under the minimum pressure range, thus saving the usage amount of the fire extinguishing agent and reducing the usage cost.

[0038] In addition, in this embodiment, both the main hole portion 21 and the secondary hole portion 22 are detachably connected, making it convenient to disassemble the main hole portion 21 and the secondary hole portion 22. Usually, the aperture size of the main spray hole 211 on the main hole portion 21 is determined after processing. By means of detachable connection, it is convenient to replace the size of the main spray hole 211 to match battery PACKs of different specifications. Similarly, the size of the secondary spray hole 221 can also be replaced by means of detachable connection. It can be understood that the sizes of the main spray hole 211 and the secondary spray hole 221 affect the lift of the water mist ejection. By directly replacing the main hole portion 21 and the secondary hole portion 22, it is more convenient, thus enabling quick matching for battery PACKs of different specifications.

[0039] In the specific implementation manner, there are various ways of detachable connection. For example, it can be a way of setting threaded portions on the main hole portion 21 and the secondary hole portion 22, so that the main hole portion 21 and the secondary hole portion 22 are connected to the main body portion through threads. It can also be to set a clamping structure on the main hole portion 21 and the secondary hole portion 22 to achieve detachable connection through the clamping structure.

[0040] In an embodiment provided by the present utility model, the angle between the axis of the main spray hole 211 and the axis of any secondary spray hole 221 is the same, so that the water mist ejection angles of the main spray hole 211 and the secondary spray holes 221 are both 60 degrees. Among them, the water mist ejection area of the main spray hole 211 is adjacent to the water mist ejection areas of the two secondary spray holes 221. When covering the battery PACK, it is mainly necessary to cover the entire rectangular surface, and the water-based fire extinguishing device is arranged on one side of the battery PACK, so its main covering area is the rectangular area directly opposite. In this embodiment, by limiting the angle between the main spray hole 211 and the secondary spray holes 221, the covering area after the cooperation of the main spray hole 211 and the secondary spray holes 221 can completely cover the rectangular surface of the entire battery PACK, thereby achieving precise coverage and avoiding waste of the fire extinguishing agent.

[0041] When specifically setting, the central projections of the main spray hole 211 and two adjacent secondary spray holes 221 are located on the same straight line, so as to facilitate the control of the coverage range. That is, when automatic fire extinguishing coverage is required, it is necessary to calculate the coverage range that each spray hole can cover. By setting them on the same straight line, the complexity of the calculation can be simplified, and precise control of the coverage range can be achieved.

[0042] In an embodiment provided by the present utility model, a circular first sunk platform is provided at the center of the top surface of the nozzle 20. The main hole portion 21 is fixedly arranged in the first sunk platform by bolts, and at least a part of the main hole portion 21 protrudes from the top surface of the nozzle 20; circular second sunk platforms are provided on both inclined surfaces at the isosceles position of the main body portion. The secondary hole portion 22 is fixedly arranged in the second sunk platform by bolts, and at least a part of the secondary hole portion 22 protrudes from the inclined surface of the nozzle 20. High-pressure fire extinguishing agent needs to be input during the fire extinguishing process of the main hole portion 21 and the secondary hole portion 22, which requires good stability of the entire device. In this embodiment, the connection method of bolts can make the connection between the main hole portion 21 and the secondary hole portion 22 more stable, and the protruding part is convenient for disassembly and installation.

[0043] It can be understood that the isosceles position of the main body portion, that is, the two inclined surfaces adjacent to the top surface. The processed first sunk platform and the second sunk platform respectively match the main hole portion 21 and the secondary hole cloth, that is, both the main hole portion 21 and the secondary hole portion 22 are cylindrical structures. This method is convenient for installation.

[0044] Specifically, two bolt holes are provided on both the main hole portion 21 and the secondary hole portion 22, and the screws lock the main hole portion 21 and the secondary hole portion 22 on the main body portion through the bolt holes.

[0045] Such as Figure 2 、 Figure 3 As shown, according to an embodiment provided by the present utility model, the fire extinguishing device further includes an angle adjustment structure 30. The nozzle 20 is rotatably connected to the fixed seat 10, and the angle adjustment structure 30 is arranged between the nozzle 20 and the fixed seat 10 to adjust the pitch angle of the nozzle 20. Usually, the nozzle 20 of the fire extinguishing device faces the side of the battery PACK to be extinguished. Such a structure can quickly realize the spraying of the fire extinguishing agent. In this embodiment, through the adjustment of the pitch structure, it can adapt to the use scenarios of different thermal runaway positions and different specifications of battery PACKs, so as to achieve coordination with the relevant scenarios.

[0046] It can be understood that different specifications of battery PACKs have different lengths and widths. In a set of energy storage systems, the same specification of battery PACKs may be used, or different specifications of battery PACKs may be used. When using different specifications of battery PACKs, the fire extinguishing devices are usually arranged in the way of maximum coverage, that is, the same fire extinguishing devices of the largest specification are used for fire extinguishing. This method will obviously increase the use cost and cause a large amount of ineffective consumption of the fire extinguishing agent. In this embodiment, the pitch angle of the nozzle 20 is adjusted through the angle adjustment structure 30, so as to be able to adapt to different specifications of battery PACKs. That is, in this embodiment, when using different specifications of battery PACKs, the adaptation of different specifications of batteries is achieved by adjusting their pitch angles.

[0047] When thermal runaway occurs at different positions, for example, when thermal runaway occurs at the far end of the battery PACK, by adjusting the pitch angle of the nozzle 20, the thicker part of the extinguishing agent ejected can cover the far end position, so as to achieve better fire extinguishing and cooling operations.

[0048] For example, temperature sensors are provided in different areas of the battery PACK. When the temperature sensors at positions other than the far end of the battery PACK issue an alarm, the extinguishing agent with normal pressure and flow rate is input to achieve fire extinguishing and cooling operations, because in the middle and near-end distances of the battery PACK, the spraying area covered by the extinguishing agent with a higher concentration is covered, while the concentration of the extinguishing agent at the far end position far from the fire extinguishing device is relatively low. When a temperature alarm occurs at the far end position of the battery PACK, it is necessary to quickly cool down and extinguish the fire at the far end. At this time, by adjusting the pitch angle, the coverage area with a higher concentration is located at the far end of the battery PACK, so as to achieve rapid fire extinguishing and cooling at the far end of the battery PACK.

[0049] Specifically, the angle adjustment structure 30 includes a hydraulic connecting rod. One end of the hydraulic connecting rod is hinged to the nozzle 20, and the other end of the hydraulic connecting rod is hinged to the fixed seat 10. The movement of the hydraulic connecting rod can drive the nozzle 20 to rotate, so as to realize the adjustment of the pitch angle of the nozzle 20.

[0050] It can be understood that the hydraulic connecting rod includes a hydraulic cylinder and a piston rod. One end of the piston rod is slidably arranged in the hydraulic cylinder, the other end of the piston rod is hinged to the nozzle 20, and the cylinder body of the hydraulic cylinder is hinged to the fixed seat 10, so that the piston rod can pull or push the nozzle 20 to rotate during the movement.

[0051] In a specific embodiment, the hydraulic connecting rod can input hydraulic oil to push the piston rod, and also has an oil return pipeline to realize the return of the hydraulic oil. Of course, in this embodiment, the extinguishing agent in the first infusion channel can also be used as the hydraulic liquid and input into the hydraulic connecting rod to realize the drive. Because, generally speaking, the mass of the nozzle 20 is small, and the adjustment angle of the pitch angle of the nozzle 20 in the present invention is limited, so that the hydraulic connecting rod only needs a small hydraulic pressure to realize the drive. In some embodiments, the liquid pressure in the first infusion channel is 10 Bar - 20 Bar, and when the fluid pressure is 18 Bar - 20 Bar or exceeds 20 Bar, the drive of the hydraulic connecting rod can be realized. This method is convenient for driving and can realize the utilization of the extinguishing agent.

[0052] According to an embodiment provided by the present utility model, a connecting portion 23 is connected to the bottom surface of the nozzle 20, a rotating shaft 24 is connected to the connecting portion 23, and the rotating shaft 24 is rotatably connected to the fixed seat 10. The nozzle 20 rotates within a certain range, thereby realizing the adjustment of the pitch angle. In this embodiment, through the connection of the rotating shaft 24, the rotation of the nozzle 20 is more stable, facilitating the control of the pitch angle adjustment.

[0053] The rotating shaft 24 is fixedly connected to the connecting portion 23, and both ends of the rotating shaft 24 are rotatably connected to the fixed seat 10. When the hydraulic connecting rod drives the nozzle 20 to move, the nozzle 20 rotates around the rotating shaft 24 by a certain angle, thereby realizing the adjustment of the pitch angle.

[0054] According to an embodiment provided by the present utility model, a rotating support seat 15 is provided at the end of the fixed seat 10. A rotating hole is provided in the rotating support seat 15, and the rotating shaft 24 is rotatably arranged in the rotating hole, and torsion springs are sleeved on both ends of the rotating shaft. The rotating support seat 15 is used for the installation of the rotating shaft 24 and provides a rotating space for the nozzle 20. In this embodiment, through the setting of the torsion springs on the rotating shaft, the rotation of the nozzle 20 can be made more stable, facilitating the control of the rotation angle.

[0055] In a specific implementation manner, one end of the torsion spring is connected in the rotating hole, and the other end of the torsion spring is connected to the rotating shaft 24. The torsion spring can make the nozzle 20 located at the first position (i.e., the conventional setting position). When the nozzle 20 reaches the second position after being pulled by the hydraulic connecting rod, the torsion spring is twisted, and the torsion spring has a restoring force, so that once the hydraulic pressure is withdrawn, the nozzle 20 can return to the first position under the action of the torsion spring.

[0056] For example, the fire extinguishing device can usually completely cover the battery PACK package when in the first position, and at this time, the pitch angle adjustment is not required. When the specification of the battery PACK package is changed and re-coverage is needed, the angle adjustment structure 30 is used for adjustment at this time, so that the nozzle 20 reaches the second position to achieve coverage. Of course, it may also be that when the fire extinguishing position is required, the angle adjustment structure 30 is used for adjustment to make the nozzle 20 reach the third position. After the fire extinguishing is completed, the nozzle 20 returns to the first position under the drive of the torsion spring.

[0057] According to an embodiment provided by the present utility model, a locking mechanism 40 is further included. The locking mechanism 40 is connected to the rotating shaft 24 to realize the locking of the rotating shaft 24. Based on the above, the torsion spring has a restoring force when the nozzle 20 reaches other positions except the first position. In this embodiment, the rotating shaft 24 is locked by the locking mechanism 40, so that the nozzle 20 in the non-first position is more stable, improving the reliability of the device.

[0058] It can be understood that the position of the nozzle 20 is a predetermined position after calculation. When the nozzle 20 reaches the predetermined position, it is necessary to continuously spray the fire extinguishing agent. In this embodiment, the locking mechanism 40 is used to lock the rotating shaft 24, improve the stability of the device, and enable the nozzle 20 to maintain the predetermined position, thereby improving the quality of the spraying operation and the fire extinguishing efficiency.

[0059] Specifically, the locking mechanism 40 includes a connecting base 41 and a hydraulic expansion sleeve 42. The connecting base 41 is arranged on the fixed seat 10, the hydraulic expansion sleeve 42 is fixedly connected to the connecting base 41, and the hydraulic expansion sleeve 42 is sleeved on the rotating shaft 24. When the rotating shaft 24 is locked, it is necessary to prevent rotation and shaking, which may affect the control of the pitch angle. In this embodiment, the setting of the hydraulic expansion sleeve 42 can quickly lock the rotating shaft 24 and prevent the shaking of the rotating shaft 24, thereby improving its stability.

[0060] It can be understood that the hydraulic expansion sleeve 42 is a conventional locking device in the prior art, and its specific structure will not be described in detail. When specifically connected, the hydraulic expansion sleeve 42 and the connecting base 41 can be fixedly connected by welding or bolt connection. The rotating shaft 24 passes through the hydraulic expansion sleeve 42, so that the rotating shaft 24 is locked under the action of the hydraulic expansion sleeve 42 to prevent the rotating shaft 24 from rotating.

[0061] According to an embodiment provided by the present invention, the connecting base 41 has a hydraulic chamber 411 and an oil return chamber 412. Connecting ports are provided in both the hydraulic chamber 411 and the oil return chamber 412. The connecting ports are connected to the hydraulic connecting rod and the hydraulic expansion sleeve 42 through a communication pipeline. The connecting base 41 is connected to the fixed seat 10. By providing two chambers in the connecting base 41, it is convenient to store hydraulic oil or other pressurized liquids, and the stability of the device can be improved through the connection with the hydraulic connecting rod and the hydraulic expansion sleeve 42.

[0062] The hydraulic chamber 411 is used for input when high-pressure hydraulic oil or other liquids are input. The connecting port on the hydraulic chamber 411 is used to connect to the driving end of the hydraulic connecting rod and the driving end of the hydraulic expansion sleeve 42. The high-pressure hydraulic oil or other liquids are input into the hydraulic connecting rod and the hydraulic expansion sleeve 42 through the pipeline, so as to realize their respective driving functions. That is, the hydraulic connecting rod realizes the pulling or pushing of the piston rod to adjust the pitch angle, and the hydraulic expansion sleeve 42 locks the rotating shaft 24 after the pitch angle is adjusted.

[0063] The connection port on the oil return chamber is used for the pressure relief of the hydraulic connecting rod and the hydraulic expansion sleeve 42. That is, the oil return chamber 412 is connected to the pressure relief ports of the hydraulic expansion sleeve 42 and the hydraulic connecting rod through pipelines respectively, so as to realize the pressure relief of the liquid in both. The setting of the oil return chamber enables the nozzle 20 to have a buffering effect when it returns to the initial position (the first position), avoiding damage to the device due to too fast return, and improving the stability and reliability of the device.

[0064] It can be understood that the hydraulic expansion sleeve 42 and the hydraulic connecting rod can be simultaneously connected to the hydraulic chamber 411, so that when the pitching adjustment is carried out, the liquid can be simultaneously injected into the hydraulic expansion sleeve 42 and the hydraulic connecting rod. Since the action of the hydraulic connecting rod is more sensitive, that is, the action can be basically realized immediately after injecting hydraulic oil without much delay, and the overall formation is limited. The action of the hydraulic expansion sleeve 42 during the action depends on the gap between the hydraulic expansion sleeve 42 and the rotating shaft 24, and the action time of the hydraulic expansion sleeve 42 is longer than that of the hydraulic connecting rod. Therefore, even if hydraulic oil is input simultaneously, the action of the hydraulic connecting rod is completed prior to that of the hydraulic expansion sleeve 42, so there will be no situation of action conflict between the two.

[0065] Of course, a connecting pipeline can also be provided between the hydraulic expansion sleeve 42 and the hydraulic chamber 411, and a control valve can be provided on the connecting pipeline to adjust the time. For example, the on-off of the connecting pipeline is controlled by the control valve, and the control valve is opened after the pitching angle adjustment is completed to realize the locking of the rotating shaft 24. Of course, it can also be the set delay opening time. For example, the control valve is opened 5 seconds after the pipeline between the hydraulic chamber 411 and the hydraulic connecting rod is in circulation, so as to realize the locking of the hydraulic expansion sleeve 42 after the pitching adjustment is completed.

[0066] In some embodiments, a pressure relief port is provided on the fixed seat 10, and a check valve 141 is provided at the pressure relief port. The hydraulic oil after pressure relief in the device is returned through the pressure relief port, so as to realize the return of the hydraulic oil.

[0067] When specifically setting, an oil return flow channel 14 is provided on the fixed seat 10, and the oil return flow channel 14 is communicated with the oil return chamber 412, so as to be able to output the pressure relief liquid from the oil return flow channel 14. Further, the check valve 141 is provided to prevent the liquid in the pipeline from flowing back into the oil return chamber after the oil return.

[0068] In some embodiments, an oil supply flow channel 13 is also provided on the fixed seat 10, and the oil supply flow channel 13 is communicated with the hydraulic chamber 411, so that the high-pressure hydraulic oil can enter the hydraulic chamber 411 through the oil supply flow channel 13, and then be input into the hydraulic connecting rod or the hydraulic expansion sleeve 42 through the hydraulic chamber 411.

[0069] In addition, a control system is matched with the fire extinguishing device in the above-mentioned embodiment. The control system includes a data processor, a temperature sensor, a fire extinguishing agent transmission system, and a hydraulic system. The temperature sensor is electrically connected to the data processor, and the hydraulic system is electrically connected to the data processor. The temperature sensor is arranged at the proximal, middle, and distal positions of the battery PACK, so as to realize the detection of the temperature of the battery PACK. When the detected temperature by the temperature sensor exceeds the temperature threshold, the data processor will control the fire extinguishing device to perform fire extinguishing and cooling operations. The control method specifically includes the following steps.

[0070] Judge the thermal runaway position through the feedback of the temperature sensor, and execute the fire extinguishing strategy based on the thermal runaway position; when the thermal runaway position is at the distal end, control the hydraulic system to actuate and input hydraulic oil to drive the hydraulic connecting rod to actuate and adjust the pitch angle, so that the nozzle 20 reaches the third position from the first position; make the fire extinguishing agent ejected from the main spray hole 211 and the secondary spray hole 221 cover the overall range of the battery PACK; and enable the fire extinguishing agent in the distal area to have a higher concentration; after the nozzle 20 reaches the second position, the hydraulic oil enters the hydraulic expansion sleeve 42 to realize the locking of the rotating shaft 24, so as to realize stable and reliable fire extinguishing operations; when the thermal runaway position is at the proximal or middle position, control the fire extinguishing transmission system to input the fire extinguishing agent for fire extinguishing. That is, except when the distal position experiences thermal runaway first, the nozzle 20 will not be driven to adjust the pitch angle.

[0071] Of course, after changing the battery PACK specification, the hydraulic system is controlled to actuate by the angle that needs to be adjusted calculated and input by the staff, so that the nozzle 20 can operate stably within a predetermined angle.

[0072] Through the description of the above embodiments, those skilled in the art can clearly understand that through the setting of spray holes with different sizes on the main hole part 21 and the secondary hole part 22, and the main spray hole 211 and the secondary spray hole 221 adopt different flow rates and pressures, it is possible to accurately cover the battery PACK under the cooperation of the main spray hole 211 and the secondary spray hole 221, so that accurate spraying and coverage can be achieved during the spraying of the fire extinguishing agent, thereby achieving comprehensive coverage and extinguishing of the energy storage battery PACK within the minimum pressure range, thus enabling rapid and effective fire extinguishing, and saving the usage amount of the fire extinguishing agent through the method of accurate coverage. Further, through the detachable connection of the main hole part 21 and the secondary hole part 22, it is convenient to replace, so that it can be quickly adapted to the battery PACK.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water-based fire extinguishing device for an energy storage battery PACK, characterized in that: include: A fixing seat having a first infusion channel and a second infusion channel; A nozzle is arranged on the fixing seat, the nozzle comprising a main body of an isosceles trapezoidal structure, the top surface of the main body is detachably connected to a main hole portion, the main hole portion is provided with a main spray hole, and two inclined surfaces at an isosceles position of the main body are detachably connected to secondary hole portions, the secondary hole portion is provided with a secondary spray hole; Among them, the aperture of the main spray hole is larger than the aperture of the secondary spray hole, the main spray hole is connected to the first infusion channel, the two secondary spray holes are connected to the second infusion channel, and the liquid pressure and flow rate in the first infusion channel are greater than the liquid pressure and flow rate in the second infusion channel.

2. The water-based fire extinguishing device for the energy storage battery PACK according to claim 1 is characterized in that: The angle between the axis of the main spray hole and the axis of any of the secondary spray holes is the same, so that the water mist spraying angles of the main spray hole and the secondary spray holes are both 60 degrees, wherein the water mist spraying area of ​​the main spray hole is adjacent to the water mist spraying areas of the two secondary spray holes.

3. The water-based fire extinguishing device for the energy storage battery PACK according to claim 1 is characterized in that: A circular first sink is provided at the center of the top surface of the nozzle, the main hole is fixed in the first sink by bolts, and at least a part of the main hole protrudes from the top surface of the nozzle; A circular second sinking platform is provided on two inclined surfaces at the isosceles position of the main body, the secondary hole portion is fixed in the second sinking platform by bolts, and at least a part of the secondary hole portion protrudes from the inclined surface of the nozzle.

4. The water-based fire extinguishing device for the energy storage battery PACK according to claim 1, characterized in that: It also includes an angle adjustment structure, wherein the nozzle is rotatably connected to the fixed seat, and the angle adjustment structure is arranged between the nozzle and the fixed seat to adjust the pitch angle of the nozzle; wherein the angle adjustment structure includes a hydraulic connecting rod, one end of the hydraulic connecting rod is hinged to the nozzle, and the other end of the hydraulic connecting rod is hinged to the fixed seat.

5. The water-based fire extinguishing device for the energy storage battery PACK according to claim 4 is characterized in that: A connecting portion is connected to the bottom surface of the nozzle, a rotating shaft is connected to the connecting portion, and the rotating shaft is rotatably connected to the fixing seat.

6. The water-based fire extinguishing device for the energy storage battery PACK according to claim 5, characterized in that: A rotating support seat is arranged at the end of the fixing seat, a rotating hole is opened on the rotating support seat, the rotating shaft is rotatably arranged in the rotating hole, and torsion springs are sleeved on both ends of the rotating shaft.

7. The water-based fire extinguishing device for the energy storage battery PACK according to claim 5, characterized in that: It also includes a locking mechanism, which is connected to the rotating shaft to achieve locking of the rotating shaft; Wherein, the locking mechanism comprises a connecting base and a hydraulic expansion sleeve, the connecting base is arranged on the fixing seat, the hydraulic expansion sleeve is fixedly connected to the connecting base, and the hydraulic expansion sleeve is arranged on the rotating shaft.

8. The water-based fire extinguishing device for the energy storage battery PACK according to claim 7, characterized in that: The connecting base has a hydraulic chamber and an oil return chamber in it. Both the hydraulic chamber and the oil return chamber are provided with connecting ports. The connecting ports are connected with the hydraulic connecting rod and the hydraulic expansion sleeve through a connecting pipeline.

9. The water-based fire extinguishing device for the energy storage battery PACK according to claim 8, characterized in that: The fixing seat is provided with a pressure relief port, and a one-way valve is provided at the pressure relief port.

10. The water-based fire extinguishing device for the energy storage battery PACK according to claim 1, characterized in that: The liquid flow rate in the first infusion channel is 0.7L / min-1.0L / min, and the liquid pressure in the first infusion channel is 10Bar-20Bar; the liquid flow rate in the second infusion channel is 0.4L / min; and the liquid pressure in the second infusion channel is 10Bar.

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