Fire extinguishing device for energy storage battery pack based on water-based fire extinguishing agent

Abstract

The utility model relates to the technical field of battery pack fire extinguishing, and provides a fire extinguishing device for an energy storage battery pack based on a water-based fire extinguishing agent, which comprises a base and a nozzle, the base is provided with a first liquid conveying flow channel and a second liquid conveying flow channel; the nozzle is arranged on the base and comprises a main body part, a main spraying hole is formed in the top surface of the main body part, and an auxiliary spraying hole is formed adjacent to the main spraying hole; the main spraying hole is communicated with the first liquid conveying channel, the auxiliary spraying hole is communicated with the second liquid conveying channel, and the pressure intensity and flow of liquid in the first liquid conveying channel are larger than those in the second liquid conveying channel. Through the arrangement of the main spraying hole and the two auxiliary spraying holes, the two spraying holes adopt different liquid flows and pressure intensities, so that accurate spraying coverage can be realized when a fire extinguishing agent is sprayed, comprehensive coverage fire extinguishing of an energy storage battery PACK can be realized in a minimum pressure range, effective fire extinguishing can be quickly realized, and the fire extinguishing efficiency is improved. And the using amount of the fire extinguishing agent is reduced 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 a fire extinguishing device for an energy storage battery PACK pack based on a water-based fire extinguishing agent. Background Art

[0002] In an energy storage battery system, common fire extinguishing agents mainly include dry powder, foam, chemical liquid, etc. These fire extinguishing agents suppress the flame by means of heat absorption, heat insulation, chemical inhibition or physical inhibition, so as to achieve the purpose of extinguishing the fire. Although these fire extinguishing agents can play a certain role in dealing with fires, their inhibitory effect on battery thermal runaway is limited. Especially under high temperature conditions, their fire extinguishing effect may not be satisfactory. As an environmentally friendly, non-toxic and easy-to-clean alternative, water-based fire extinguishing agents have gradually attracted attention. Commonly used fire extinguishing nozzles generally adopt a jet or spray design. These nozzles can evenly spray the fire extinguishing agent on the fire area to quickly extinguish the flame.

[0003] In the related art, it is often difficult for the nozzle to achieve precise spraying of the water-based fire extinguishing agent, resulting in ineffective spraying of some fire extinguishing agents, which cannot fully meet the requirements of complex fire scenarios, and making the fire extinguishing coverage and fire extinguishing efficiency poor when dealing with battery fires. Therefore, in addition to a nozzle that conforms to the characteristics of the water-based fire extinguishing agent, it is also necessary to design a more economical nozzle with a wide fire extinguishing coverage. On the premise of ensuring the fire extinguishing effect, the use amount of the fire extinguishing agent should be reduced as much as possible, the resource utilization rate should be improved, and the requirements of different fire scenarios should be adapted. Summary of the Utility Model

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

[0005] The utility model provides a fire extinguishing device for an energy storage battery PACK pack based on a water-based fire extinguishing agent, including: a base and a nozzle; the base has at least a first liquid delivery channel and a second liquid delivery channel; the nozzle is arranged on the base, and the nozzle includes a frustum-shaped main body part, a main spray hole is arranged on the top surface of the main body part, and auxiliary spray holes are arranged on two inclined surfaces adjacent to the main spray hole, and the main spray hole and the two auxiliary spray holes are arranged on a straight line; wherein, the main spray hole is communicated with the first liquid delivery channel, the two auxiliary 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 the liquid pressure and flow rate in the second liquid delivery channel.

[0006] According to the fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent provided by the present utility model, it further includes a pitch adjustment structure. The nozzle is rotatably connected to the base, and the pitch adjustment structure is arranged between the nozzle and the base to adjust the pitch angle of the nozzle.

[0007] According to the fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent provided by the present utility model, the pitch adjustment structure includes a hydraulic rod. One end of the hydraulic rod is hinged to the nozzle, and the other end of the hydraulic rod is hinged to the base.

[0008] According to the fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent provided by the present utility model, a connecting seat is connected to the bottom surface of the nozzle, and a rotating shaft is connected to the connecting seat. The rotating shaft is rotatably connected to the base.

[0009] According to the fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent provided by the present utility model, a rotating seat is provided at the end of the base. A rotating hole is provided in the rotating seat, and the rotating shaft is rotatably arranged in the rotating hole, and torsion springs are sleeved on both ends of the rotating shaft.

[0010] According to the fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent provided by the present utility model, it further includes a locking mechanism. The locking mechanism is connected to the rotating shaft to lock the rotating shaft.

[0011] According to the porous fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent provided by the present utility model, the locking mechanism includes a connecting base and a hydraulic expansion sleeve. The connecting base is arranged on the base, 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 fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent provided by the present utility model, a hydraulic chamber and an oil return chamber are provided in the connecting base. Connecting ports are provided in both the hydraulic chamber and the oil return chamber, and the connecting ports are communicated with the hydraulic rod and the hydraulic expansion sleeve through a communicating pipeline.

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

[0014] According to the fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent 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] A fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent provided by the present utility model, through the settings of the main spray hole and two auxiliary spray holes, and with different liquid flow rates and pressures for the main spray hole and the auxiliary spray holes, enables precise spraying coverage during the spraying of the fire extinguishing agent, thereby enabling comprehensive coverage and extinguishing of the energy storage battery PACK within the smallest pressure range, thus enabling rapid and effective fire extinguishing, and saving the usage amount of the fire extinguishing agent through the method of precise coverage. 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 Numerals:

[0023] 10. Base; 11. First infusion channel; 12. Second infusion channel; 13. Oil delivery channel; 14. Oil return channel; 141. Check valve; 15. Rotating seat; 20. Nozzle; 21. Main injection hole; 22. Auxiliary injection hole; 23. Connecting seat; 24. Rotating shaft; 30. Pitch adjustment structure; 40. Locking mechanism; 41. Connecting base; 411. Hydraulic chamber; 412. Oil return chamber; 42. Hydraulic expansion sleeve. Detailed implementation manners

[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. Apparently, 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 in the present utility model without making creative efforts shall 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 thus should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not 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 limited, the terms "connected" and "connected to" 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 situations.

[0027] In the embodiments of the present utility model, unless otherwise clearly specified and defined, 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 horizontal height of the first feature is higher than that of the second feature. 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 horizontal height of the first feature is less than that of the second feature.

[0028] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the 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 avoid 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 is in thermal runaway.

[0030] In the related art, dry powder, foam and chemical liquids are usually used as fire extinguishing agents for fire extinguishing, 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 it is fully covered, 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, and this method 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 a fire extinguishing device for an energy storage battery PACK using a water-based fire extinguishing agent, which includes a base 10 and a nozzle 20; the base 10 has at least a first liquid delivery channel 11 and a second liquid delivery channel 12; the nozzle 20 is arranged on the base 10, and the nozzle 20 includes a frustum-shaped main body part, a main spray hole 21 is arranged on the top surface of the main body part, and auxiliary spray holes 22 are arranged on two inclined surfaces adjacent to the main spray hole 21. The main spray hole 21 and the two auxiliary spray holes 22 are arranged on a straight line, that is, the central projections of the main spray hole 21 and the two auxiliary spray holes 22 are located on the same straight line; wherein, the main spray hole 21 is communicated with the first liquid delivery channel 11, the two auxiliary spray holes 22 are communicated with the second liquid delivery channel, and the liquid pressure and flow rate in the first liquid delivery channel are greater than the liquid pressure and flow rate in the second liquid delivery channel. When extinguishing a fire for 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, by providing the main spray hole 21 and the two auxiliary spray holes 22, accurate coverage of the entire battery PACK is achieved, improving the efficiency of the fire extinguishing operation and enabling effective and timely fire extinguishing operations.

[0032] The fire extinguishing device is arranged on one side of a rectangular block-shaped battery PACK. If it is set at a too far 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 a large installation space is required for a too far setting. 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 21 can cover most areas of the battery PACK, and the two auxiliary spray holes 22 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 fire extinguishing device is installed at the middle position of the battery PACK, so that the main spray hole 21 is directly opposite to the central axis position of the battery PACK. A part of the water-based fire extinguishing agent is ejected from the main spray hole 21 through the first liquid delivery channel. The fire extinguishing agent ejected from the first main spray hole 21 covers most areas at the far end of the battery PACK (such as Figure 5 the A area shown), thus achieving fire extinguishing and cooling of the battery PACK. Another part of the water-based fire extinguishing agent is ejected from the auxiliary spray hole 22 through the second liquid delivery channel. The auxiliary spray holes are arranged on two inclined surfaces of the main body part, so as to be able to cover the areas on both sides of the battery PACK (such as Figure 5 the B area and the C area shown), thus achieving overall coverage of the battery PACK.

[0034] It can be understood that the main injection hole 21 needs to cover the farthest end of the battery PACK (the position farthest from the fire extinguishing device). The axial distance of the auxiliary injection hole 22 is less than the axial position that the main injection hole 21 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.

[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 injection hole 21 and the auxiliary injection hole 22 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 injection hole 21 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 enables most of the fire extinguishing agent ejected through the auxiliary injection hole 22 to be sprayed onto the areas on both sides of the proximal end of the PACK. Thus, through the cooperation of the main injection hole 21 and the auxiliary injection hole 22, the complete coverage of the battery PACK is achieved.

[0037] It can be understood that the main injection hole 21 can reach the distal position with a large flow rate and large pressure (relative to the auxiliary injection hole 22), achieving most of the coverage of the battery PACK. The auxiliary injection hole 22 can effectively supplement the fire extinguishing agent for the remaining area with a small flow rate and small pressure, thus achieving precise spraying and precise coverage, enabling it to achieve full coverage and extinguishing of the energy storage battery PACK under the smallest pressure range, thereby saving the usage amount of the fire extinguishing agent and reducing the usage cost.

[0038] Such as Figure 2 、 Figure 3 As shown, according to an embodiment provided by the present invention, the fire extinguishing device further includes a pitch adjustment structure 30. The nozzle 20 is rotatably connected to the base 10, and the pitch adjustment structure 30 is arranged between the nozzle 20 and the base 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 the battery PACK, and then achieve the coordination with the relevant scenarios.

[0039] It can be understood that battery PACKs of different specifications have different lengths and widths. In a set of energy storage systems, battery PACKs of the same specification may be used, or battery PACKs of different specifications may be used. When using battery PACKs of different specifications, fire extinguishing devices are usually arranged in the way of maximum coverage, that is, fire extinguishing is carried out with the same fire extinguishing devices of the largest specification. This method will obviously increase the use cost and cause ineffective consumption of a large amount of fire extinguishing agent. In this embodiment, the pitching angle of the nozzle 20 is adjusted through the pitching adjustment structure 30, so as to adapt to battery PACKs of different specifications. That is, in this embodiment, when using battery PACKs of different specifications, the pitching angle is adjusted to achieve adaptation to different specifications of batteries.

[0040] When thermal runaway occurs at different positions, for example, when thermal runaway occurs at the distal position of the battery PACK, the pitching angle of the nozzle 20 is adjusted so that the thicker part of the ejected fire extinguishing agent can cover the distal position, thereby achieving better fire extinguishing and cooling operations.

[0041] For example, temperature sensors are provided in different areas of the battery PACK. When the temperature sensors at positions other than the distal position of the battery PACK issue an alarm, fire extinguishing and cooling operations are carried out by inputting fire extinguishing agent with normal pressure and flow rate, because the areas covered by the spraying of fire extinguishing agent with a higher concentration are in the middle and proximal distances of the battery PACK, while the concentration of the fire extinguishing agent at the distal position far from the fire extinguishing device is relatively low. When it is detected that a temperature alarm appears at the distal position of the battery PACK, it is necessary to quickly carry out cooling and fire extinguishing operations on the distal end. At this time, by adjusting the pitching angle, the coverage area with a higher concentration is located at the distal end of the battery PACK, so as to achieve rapid fire extinguishing and cooling at the distal end of the battery PACK.

[0042] Specifically, the pitching adjustment structure 30 includes a hydraulic rod. One end of the hydraulic rod is hinged to the nozzle 20, and the other end of the hydraulic rod is hinged to the base 10. The action of the hydraulic rod can drive the nozzle 20 to rotate, so as to realize the adjustment of the pitching angle of the nozzle 20.

[0043] It can be understood that the hydraulic 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 base 10, so that the piston rod can pull or push the nozzle 20 to rotate during the movement process.

[0044] In a specific embodiment, the hydraulic rod can input hydraulic oil to push the piston rod and also has an oil return pipeline to realize the return flow of the hydraulic oil. Of course, in this embodiment, the fire extinguishing agent in the first infusion channel can also be used as the hydraulic liquid and input into the hydraulic rod to achieve driving. Because, in itself, 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 rod only needs a relatively small hydraulic pressure to achieve driving. 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 driving of the hydraulic rod can be achieved. This method is convenient for driving and can utilize the fire extinguishing agent.

[0045] According to an embodiment provided by the present invention, a connecting seat 23 is connected to the bottom surface of the nozzle 20, a rotating shaft 24 is connected to the connecting seat 23, and the rotating shaft 24 is rotatably connected to the base 10. The nozzle 20 rotates within a certain range to realize 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, which is convenient for controlling the adjustment of the pitch angle.

[0046] The rotating shaft 24 is fixedly connected to the connecting seat 23, and both ends of the rotating shaft 24 are rotatably connected to the base 10. When the hydraulic rod drives the nozzle 20 to move, the nozzle 20 rotates around the rotating shaft 24 by a certain angle to realize the adjustment of the pitch angle.

[0047] According to an embodiment provided by the present invention, a rotating seat 15 is provided at the end of the base 10, a rotating hole is formed in the rotating seat 15, 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 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, which is beneficial to the control of the rotation angle.

[0048] In a specific embodiment, 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 under the pulling of the hydraulic 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.

[0049] For example, the fire extinguishing device can usually completely cover the battery PACK in the first position, and at this time, there is no need to adjust the pitch angle. When the specification of the battery PACK is changed and re-coverage is required, the pitch 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 is also possible that when the fire extinguishing position is required, the pitch adjustment structure 30 is used for adjustment so that the nozzle 20 reaches the third position. After the fire extinguishing is completed, the nozzle 20 returns to the first position under the drive of the torsion spring.

[0050] According to an embodiment provided by the present invention, it further includes a locking mechanism 40. The locking mechanism 40 is connected to the rotating shaft 24 to lock the rotating shaft 24. Based on the above, when the nozzle 20 reaches other positions except the first position, the torsion spring has a restoring force. 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.

[0051] 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, the fire extinguishing agent needs to be continuously sprayed. In this embodiment, the locking mechanism 40 is used to lock the rotating shaft 24, improving the stability of the device and enabling the nozzle 20 to maintain the predetermined position, thereby improving the quality of the spraying operation and the fire extinguishing efficiency.

[0052] Specifically, the locking mechanism 40 includes a connection base 41 and a hydraulic expansion sleeve 42. The connection base 41 is provided on the base 10. The hydraulic expansion sleeve 42 is fixedly connected to the connection 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 hydraulic expansion sleeve 42 can quickly lock the rotating shaft 24 and prevent the rotation and shaking of the rotating shaft 24, improving its stability.

[0053] 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 connection 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 rotation of the rotating shaft 24.

[0054] According to an embodiment provided by the present invention, the connection base 41 has a hydraulic chamber 411 and an oil return chamber 412. Connection ports are provided in both the hydraulic chamber 411 and the oil return chamber 412. The connection ports are connected to the hydraulic rod and the hydraulic expansion sleeve 42 through a communication pipeline. The connection base 41 is connected to the base 10. By providing two chambers in the connection base 41, it is convenient to hold hydraulic oil or other pressurized liquids, and the stability of the device can be improved through the connection with the hydraulic rod and the hydraulic expansion sleeve 42.

[0055] The hydraulic chamber 411 is used for inputting high-pressure hydraulic oil or other liquids. The connection port on the hydraulic chamber 411 is used to connect with the driving end of the hydraulic rod and the driving end of the hydraulic expansion sleeve 42. The high-pressure hydraulic oil or other liquids are input into the hydraulic rod and the hydraulic expansion sleeve 42 through pipelines, so as to realize their respective driving functions. That is, the hydraulic rod realizes the pulling or pushing of the piston rod to adjust the pitch angle, and the hydraulic expansion sleeve 42 realizes the locking of the rotating shaft 24 after the pitch angle is adjusted.

[0056] The connection port on the oil return chamber is used for the pressure relief of the hydraulic rod and the hydraulic expansion sleeve 42. That is, the oil return chamber 412 is connected with the pressure relief port of the hydraulic expansion sleeve 42 and the pressure relief port of the hydraulic 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 returning 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.

[0057] It can be understood that the hydraulic expansion sleeve 42 and the hydraulic rod can be simultaneously connected to the hydraulic chamber 411, so that when the pitch is adjusted, the liquid can be simultaneously injected into the hydraulic expansion sleeve 42 and the hydraulic rod. Since the action of the hydraulic rod is more sensitive, that is, the action is realized immediately after the hydraulic oil is injected with little delay and the overall formation is limited. The action of the hydraulic expansion sleeve 42 during the action depends on the clearance 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 rod. Therefore, even if the hydraulic oil is input simultaneously, the action of the hydraulic rod is completed prior to that of the hydraulic expansion sleeve 42, so there will be no situation of action conflict between the two.

[0058] Of course, a connecting pipeline can also be provided between the hydraulic expansion sleeve 42 and the hydraulic chamber 411, and a control valve is provided on the connecting pipeline for time adjustment. For example, the on-off of the connecting pipeline is controlled by the control valve, and the control valve is opened after the pitch angle is adjusted to realize the locking of the rotating shaft 24. Of course, it can also be a set delay opening time. For example, the control valve is opened 5 seconds after the pipeline between the hydraulic chamber 411 and the hydraulic rod is in circulation, so that the hydraulic expansion sleeve 42 realizes locking after the pitch adjustment is completed.

[0059] In some embodiments, a pressure relief port is provided on the base 10, and a one-way 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.

[0060] Specifically, an oil return flow channel 14 is provided on the base 10, and the oil return flow channel 14 is communicated with the oil return chamber 412, so as to realize the output of the pressure relief liquid from the oil return flow channel 14. Further, the one-way valve 141 is provided to prevent the liquid in the pipeline from flowing back into the oil return chamber after the oil return.

[0061] In some embodiments, an oil delivery channel 13 is further provided on the base 10. The oil delivery channel 13 is communicated with the hydraulic chamber 411, so that high-pressure hydraulic oil can enter the hydraulic chamber 411 through the oil delivery channel 13 and then be input into the hydraulic rod or the hydraulic expansion sleeve 42 through the hydraulic chamber 411.

[0062] In addition, a control system is matched for the fire extinguishing device in the above 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 temperature detected 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.

[0063] 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 to input hydraulic oil, drive the hydraulic rod to actuate to 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 21 and the auxiliary spray holes 22 cover the entire 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 for the thermal runaway at the distal end first, the nozzle 20 will not be driven to adjust the pitch angle.

[0064] Of course, after replacing the battery PACK specifications, by inputting the angle that needs to be adjusted by the staff after calculation, the hydraulic system is controlled to actuate, so that the nozzle 20 can operate stably within a predetermined angle.

[0065] A porous fire extinguishing device for an energy storage battery PACK based on a water-based fire extinguishing agent provided by the present invention, through the settings of the main spray hole 21 and two auxiliary spray holes 22, and the main spray hole 21 and the auxiliary spray holes 22 adopt different liquid flow rates and pressures, so that accurate spraying coverage can be achieved during the spraying of the fire extinguishing agent, so that the entire coverage of the energy storage battery PACK can be achieved under the minimum pressure range, so as to quickly achieve effective fire extinguishing, and the usage amount of the fire extinguishing agent is saved by the way of accurate coverage. Further, through the setting of the pitch adjustment structure 30, the fire extinguishing quality can be improved, and it can be adapted to the matching of different specifications of battery PACKs.

[0066] 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 described in the foregoing embodiments, or perform equivalent replacements on 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 various embodiments of the present invention.

Claims

1. A fire extinguishing device for an energy storage battery PACK based on a water-based fire extinguishing agent, characterized in that: include: A base, the base having at least a first infusion channel and a second infusion channel; A nozzle is arranged on the base, the nozzle comprises a main body in the shape of a quadrangular pyramid, a main spray hole is arranged on the top surface of the main body, and auxiliary spray holes are arranged on two inclined surfaces adjacent to the main spray hole, and the main spray hole and the two auxiliary spray holes are arranged in a straight line; The main spray hole is connected to the first infusion channel, the two auxiliary 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 fire extinguishing device for the energy storage battery PACK based on the water-based fire extinguishing agent according to claim 1 is characterized in that: It also includes a pitch adjustment structure, the nozzle is rotatably connected to the base, and the pitch adjustment structure is arranged between the nozzle and the base to adjust the pitch angle of the nozzle.

3. The fire extinguishing device for the energy storage battery PACK based on the water-based fire extinguishing agent according to claim 2 is characterized in that: The pitch adjustment structure comprises a hydraulic rod, one end of which is hinged to the nozzle, and the other end of which is hinged to the base.

4. The fire extinguishing device for the energy storage battery PACK based on the water-based fire extinguishing agent according to claim 3 is characterized in that: A connecting seat is connected to the bottom surface of the nozzle, a rotating shaft is connected to the connecting seat, and the rotating shaft is rotatably connected to the base.

5. The fire extinguishing device for the energy storage battery PACK based on the water-based fire extinguishing agent according to claim 4 is characterized in that: A rotating seat is arranged at the end of the base, a rotating hole is opened on the rotating seat, the rotating shaft is rotatably arranged in the rotating hole, and torsion springs are sleeved on both ends of the rotating shaft.

6. The fire extinguishing device for energy storage battery PACK based on water-based fire extinguishing agent according to claim 4 is characterized in that: It also includes a locking mechanism, which is connected to the rotating shaft to achieve locking of the rotating shaft.

7. The fire extinguishing device for the energy storage battery PACK based on the water-based fire extinguishing agent according to claim 6 is characterized in that: The locking mechanism comprises a connecting base and a hydraulic expansion sleeve, wherein the connecting base is arranged on the base, the hydraulic expansion sleeve is fixedly connected to the connecting base, and the hydraulic expansion sleeve is sleeved on the rotating shaft.

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

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

10. The fire extinguishing device for energy storage battery PACK based on water-based fire extinguishing agent 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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