Energy storage spiral fire extinguishing device

Abstract

The utility model discloses an energy storage spiral fire extinguishing device which comprises a pipe body, a nozzle and a piston, the nozzle is arranged at one end of the pipe body, the piston is slidably mounted in the pipe body, and the other end of the pipe body is of a threaded locking structure. A fire extinguishing agent is stored in a space between the nozzle and the piston in the pipe body; a gas generating device is arranged in the space, between the piston and the threaded locking structure, in the pipe body, a starting device is arranged on the side, facing the piston, of the threaded locking structure, the gas generating device is in signal control connection with the starting device, and the starting device is externally connected with a power source. Through the integrated design of the pipe body, the nozzle and the piston, installation and maintenance are convenient; through signal connection between the gas generating device and the starting device, high-pressure gas is quickly generated after an electric signal is received to push the piston, so that a fire extinguishing agent in the pipe body is quickly released through the nozzle, and thermal runaway of the lithium battery is effectively inhibited; and meanwhile, the thread locking knot can be directly screwed and installed in the electric box and is convenient to replace, so that the maintenance cost and time are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of energy storage system technology, and in particular to an energy storage spiral fire extinguishing device. Background Technology

[0002] With the promotion and application of new energy sources such as solar and wind power, energy storage technology has also developed. Lithium batteries have gradually become the mainstream energy storage product due to their advantages such as high energy density, long service life, high rated voltage, high power handling capacity, low self-discharge rate, light weight, green and environmentally friendly properties, and minimal water consumption during production.

[0003] The charge-discharge cycle life and safety of lithium-ion batteries are greatly affected by temperature. When the cell temperature is too high or the temperature difference is large, the cell cycle life will decrease significantly, affecting the service life of energy storage products. In severe cases, it can lead to thermal runaway of the cell.

[0004] When a battery cell experiences thermal runaway, it generates a large amount of flammable gas. When the concentration of flammable gas reaches a certain level, it can easily explode upon contact with even a small spark, causing significant loss of life and property.

[0005] Most energy storage battery packs typically use external pressurized fire suppression systems, pump-type fire suppression systems, or power bank-type fire suppression systems.

[0006] External pressurized gas extinguishing systems and pump-type extinguishing systems are greatly affected by temperature due to the properties of agents such as heptafluoropropane and nitrogen. In low-temperature areas, the internal gas pressure is easily too low, and the extinguishing system is in a low-pressure state, which cannot meet the requirements for effective and timely extinguishing when the energy storage battery pack experiences thermal runaway.

[0007] Ordinary power bank-style fire extinguishing systems are installed inside battery packs, which require frequent replacement due to their short lifespan and necessitate the removal of the battery pack during maintenance, making project maintenance inconvenient. Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide an energy storage spiral fire extinguishing device that is easy to install and maintain, and effectively solves the problem of troublesome maintenance of fire extinguishing devices in the battery pack of energy storage systems.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0010] An energy-storage spiral fire extinguishing device includes a tube, a nozzle, and a piston;

[0011] The nozzle is located at one end of the tube body, the piston is slidably installed in the tube body, and the other end of the tube body has a threaded locking structure;

[0012] The space inside the tube between the nozzle and the piston stores a fire extinguishing agent.

[0013] A gas generating device is provided in the space between the piston and the threaded locking structure inside the tube. A starting device is provided on the side of the threaded locking structure facing the piston. The gas generating device is connected to the starting device by signal control. The starting device is connected to an external power source.

[0014] Furthermore, the nozzle is disposed on the circumferential surface of one end of the tube body, and the spraying direction of the nozzle is perpendicular to the circumferential surface of the tube body.

[0015] Furthermore, the piston includes a sealing pressure relief layer and a movable compression device;

[0016] The sealing and pressure relief layer is matched with the inner wall of the tube body, and the movable extrusion device is fixed on the side of the sealing and pressure relief layer facing the nozzle.

[0017] Furthermore, the sealing and pressure relief layer includes a first sealing ring and a circular stainless steel sheet;

[0018] The first sealing ring is arranged around the circumference of the circular stainless steel sheet.

[0019] Furthermore, a feedback device is provided on the side of the threaded locking structure facing the piston;

[0020] The feedback device is connected to the starting device via signal control.

[0021] Furthermore, the feedback device has two closed metal springs on the side facing the piston, and an insulating plastic sheet is placed between the two closed metal springs. The end of the insulating plastic sheet facing the piston is fixedly connected to the piston by a traction steel wire, and the end of the insulating plastic sheet facing the threaded locking structure is connected to the threaded locking structure by a retractable spring.

[0022] Furthermore, the feedback device is located on the axis of the tube body.

[0023] Furthermore, the starting device is connected to a power supply via an external starting wire;

[0024] The feedback device is connected to the main control board of the energy storage system via an external feedback wiring connection.

[0025] Furthermore, it also includes detection devices;

[0026] The detection device is located outside the tube and is connected to the starting device via a detection signal line.

[0027] Furthermore, a second sealing ring is fitted onto the end of the threaded locking structure away from the piston.

[0028] The beneficial effects of this utility model are as follows: the integrated design of the tube, nozzle and piston achieves compactness and modularity of the fire extinguishing device, which is convenient for installation and maintenance; through the signal connection between the gas generating device and the starting device, high-pressure gas can be quickly generated to push the piston after receiving an electrical signal, ensuring that the fire extinguishing agent in the tube is quickly released through the nozzle, effectively suppressing the thermal runaway of the lithium battery in the battery pack; at the same time, the threaded locking structure solves the problem of the traditional rectangular fire extinguishing device requiring the removal of the battery pack, and can be directly screwed into the electrical box for easy replacement, greatly reducing maintenance costs and time. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an energy storage spiral fire extinguishing device according to an embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the sealing and pressure relief layer in an energy storage spiral fire extinguishing device according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the feedback device in an energy storage spiral fire extinguishing device according to an embodiment of the present invention.

[0032] Label Explanation:

[0033] 1. Pipe body; 2. Nozzle; 3. Piston; 31. Movable extrusion device; 32. Sealing and pressure relief layer; 321. Circular stainless steel sheet; 322. First sealing ring; 4. Gas generating device; 5. Threaded locking structure; 51. Second sealing ring; 6. Starting device; 61. Starting external wiring; 7. Feedback device; 71. Feedback external wiring; 72. Metal spring; 73. Insulating plastic sheet; 74. Traction steel wire; 75. Telescopic spring; 8. Detection device; 81. Detection signal line; 9. Fire extinguishing agent. Detailed Implementation

[0034] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0035] Please refer to Figures 1 to 3 An energy-storage spiral fire extinguishing device includes a tube, a nozzle, and a piston;

[0036] The nozzle is located at one end of the tube body, the piston is slidably installed in the tube body, and the other end of the tube body has a threaded locking structure;

[0037] The space inside the tube between the nozzle and the piston stores a fire extinguishing agent.

[0038] A gas generating device is provided in the space between the piston and the threaded locking structure inside the tube. A starting device is provided on the side of the threaded locking structure facing the piston. The gas generating device is connected to the starting device by signal control. The starting device is connected to an external power source.

[0039] As can be seen from the above description, the beneficial effects of this utility model are as follows: through the integrated design of the tube body, nozzle, and piston, the fire extinguishing device is made compact and modular, which facilitates installation and maintenance; through the signal connection between the gas generating device and the starting device, high-pressure gas can be quickly generated after receiving an electrical signal to push the piston, ensuring that the fire extinguishing agent in the tube body is quickly released through the nozzle, effectively suppressing the thermal runaway of the lithium battery in the battery pack; at the same time, the threaded locking structure solves the problem of the traditional rectangular fire extinguishing device requiring the removal of the battery pack, allowing it to be directly screwed into the electrical box and easily replaced, greatly reducing maintenance costs and time.

[0040] Furthermore, the nozzle is disposed on the circumferential surface of one end of the tube body, and the spraying direction of the nozzle is perpendicular to the circumferential surface of the tube body.

[0041] As described above, the nozzle is circumferentially arranged and perpendicular to the pipe body, allowing the fire extinguishing agent to evenly cover the internal space of the battery pack, avoiding dead zones and improving fire extinguishing efficiency; it is also suitable for side wall installation of cylindrical battery packs or electrical boxes, and its spiral design optimizes space utilization.

[0042] Furthermore, the piston includes a sealing pressure relief layer and a movable compression device;

[0043] The sealing and pressure relief layer is matched with the inner wall of the tube body, and the movable extrusion device is fixed on the side of the sealing and pressure relief layer facing the nozzle.

[0044] As described above, the sealing and pressure relief layer matches the inner wall of the pipe to prevent leakage of fire extinguishing agent. At the same time, the movable extrusion device enhances the piston thrust to ensure that the fire extinguishing agent is completely sprayed out. In addition, the sealing and pressure relief layer can automatically release excess pressure when there is overpressure, preventing the pipe from bursting and improving safety.

[0045] Furthermore, the sealing and pressure relief layer includes a first sealing ring and a circular stainless steel sheet;

[0046] The first sealing ring is arranged around the circumference of the circular stainless steel sheet.

[0047] As described above, the combination of the first sealing ring and the circular stainless steel sheet provides long-term stable sealing performance, high temperature resistance and corrosion resistance, effectively adapting to the thermal runaway environment of lithium batteries; at the same time, the circular stainless steel sheet also enhances the structural strength of the piston and extends the service life of the fire extinguishing device.

[0048] Furthermore, a feedback device is provided on the side of the threaded locking structure facing the piston;

[0049] The feedback device is connected to the starting device via signal control.

[0050] As described above, the feedback device can monitor the piston position or the release status of the fire extinguishing agent in real time and transmit the signal to the starting device or main control board to achieve closed-loop control of the fire extinguishing process. At the same time, the feedback device can also detect whether the fire extinguishing device has been successfully activated to avoid secondary disasters caused by failure.

[0051] Furthermore, the feedback device has two closed metal springs on the side facing the piston, and an insulating plastic sheet is placed between the two closed metal springs. The end of the insulating plastic sheet facing the piston is fixedly connected to the piston by a traction steel wire, and the end of the insulating plastic sheet facing the threaded locking structure is connected to the threaded locking structure by a retractable spring.

[0052] Furthermore, the feedback device is located on the axis of the tube body.

[0053] As described above, the separation action of the metal spring and the insulating plastic sheet is achieved by linking the traction steel wire with the piston, realizing physical feedback of the fire extinguishing agent release status, and has strong anti-electromagnetic interference capability; at the same time, the retractable spring allows the insulating plastic sheet to reset after the fire is extinguished, which facilitates the reuse of the fire extinguishing device or the state reset.

[0054] Furthermore, the starting device is connected to a power supply via an external starting wire;

[0055] The feedback device is connected to the main control board of the energy storage system via an external feedback wiring connection.

[0056] As described above, the external connection for starting and the external connection for feedback are connected to the power supply and the main control board, respectively, supporting remote triggering and status monitoring of the energy storage system and adapting to intelligent energy storage system management. The seamless integration with the main control board of the energy storage system effectively enables the fire extinguishing device to work in coordination with other safety modules.

[0057] Furthermore, it also includes detection devices;

[0058] The detection device is located outside the tube and is connected to the starting device via a detection signal line.

[0059] As described above, the detection device installed outside the pipe can monitor the temperature or gas concentration of the battery pack inside the electrical box in real time, triggering fire extinguishing in advance to prevent fires from happening in the first place; and the separate design of the detection device from the pipe body makes it easy to optimize the installation position according to the battery pack structure.

[0060] Furthermore, a second sealing ring is fitted onto the end of the threaded locking structure away from the piston.

[0061] As described above, the second sealing ring further seals the connection between the threaded locking structure and the electrical box, preventing fire extinguishing agents or external contaminants from seeping in, ensuring suitability for energy storage scenarios with high vibration or large temperature differences, and achieving long-term stability.

[0062] This utility model provides an energy storage spiral fire extinguishing device, which is suitable for effective and timely fire extinguishing when the battery pack cells in the electrical box experience thermal runaway and cause a fire. The following is a detailed description in conjunction with the embodiments.

[0063] Please refer to Figure 1 Embodiment 1 of this utility model is as follows:

[0064] An energy-storage spiral fire extinguishing device, such as Figure 1 As shown, it includes a tube body 1, a nozzle 2, and a piston 3.

[0065] The nozzle 2 is located at one end of the tube body 1, and the piston 3 is slidably installed inside the tube body 1. The other end of the tube body 1 has a threaded locking structure 5. In this embodiment, one end of the threaded locking structure 5 of the tube body 1 can be screwed into the electrical box arm. At the same time, the space between the nozzle 2 and the piston 3 inside the tube body 1 stores fire extinguishing agent 9. A gas generating device 4 is installed in the space between the piston 3 and the threaded locking structure 5 inside the tube body 1. A starting device 6 is installed on the side of the threaded locking structure 5 facing the piston 3. The gas generating device 4 and the starting device 6 are connected by signal control. The starting device 6 is connected to an external power source. When the battery pack experiences thermal runaway, the starting device 6 can be activated. The starting device 6 outputs a control signal to the gas generating device 4 inside the tube body 1. The high-pressure gas from the gas generating device 4 pushes the piston 3, pushing the fire extinguishing agent 9 towards the nozzle 2. The nozzle 2 is subjected to high pressure and ruptures, spraying out the fire extinguisher inside the tube body 1, thereby timely and effectively extinguishing the thermal runaway battery cell.

[0066] In this embodiment, the integrated design of the tube body 1, nozzle 2, and piston 3 achieves a compact and modular fire extinguishing device, facilitating installation and maintenance. Through the signal connection between the gas generating device 4 and the starting device 6, high-pressure gas can be quickly generated upon receiving an electrical signal to push the piston 3, ensuring that the fire extinguishing agent 9 in the tube body 1 is rapidly released through the nozzle 2, effectively suppressing thermal runaway of the lithium battery in the battery pack. At the same time, the threaded locking structure 5 solves the problem of disassembling the battery pack in traditional cuboid fire extinguishing devices, allowing for direct screwing and installation into the electrical box and easy replacement, significantly reducing maintenance costs and time.

[0067] In this embodiment, such as Figure 1 As shown, nozzle 2 is located on the circumferential surface of pipe body 1, and the spraying direction of nozzle 2 is perpendicular to the circumferential surface of pipe body 1.

[0068] The nozzle 2 is circumferentially arranged and perpendicular to the pipe body 1, allowing the fire extinguishing agent 9 to evenly cover the internal space of the battery pack, avoiding dead zones and improving fire extinguishing efficiency; it is also suitable for side wall installation of cylindrical battery packs or electrical boxes, and its spiral design optimizes space utilization.

[0069] In addition, in this embodiment, the nozzle 2 is a disposable pressure nozzle 2. That is, the pressure nozzle 2 completely releases the extinguishing agent after a single triggering, avoiding the risk of residue or secondary leakage; at the same time, the disposable pressure nozzle 2 can effectively simplify the structure of the nozzle 2 and reduce production and maintenance costs.

[0070] Please refer to Figure 1 and Figure 2 Embodiment two of this utility model is as follows:

[0071] An energy-storage spiral fire extinguishing device, based on the above-described embodiment one, in this embodiment, as follows: Figure 1 As shown, piston 3 includes a sealing pressure relief layer 32 and a movable compression device 31.

[0072] In this embodiment, the sealing pressure relief layer 32 is installed to match the inner wall of the pipe body 1, and the movable extrusion device 31 is fixed on the side of the sealing pressure relief layer 32 facing the nozzle 2. That is, the sealing pressure relief layer 32 matches the inner wall of the pipe body 1 to prevent the fire extinguishing agent 9 from leaking. At the same time, the movable extrusion device 31 enhances the thrust of the piston 3 to ensure that the fire extinguishing agent 9 is completely sprayed out. Meanwhile, the sealing pressure relief layer 32 can automatically release excess pressure when there is overpressure to prevent the pipe body 1 from bursting and improve safety.

[0073] And in this embodiment, such as Figure 2 As shown, the sealing and pressure relief layer 32 includes a first sealing ring 322 and a circular stainless steel sheet 321, with the first sealing ring 322 arranged around the circumference of the circular stainless steel sheet 321.

[0074] The combination of the first sealing ring 322 and the circular stainless steel sheet 321 provides long-term stable sealing performance, high temperature resistance and corrosion resistance, effectively adapting to the thermal runaway environment of lithium batteries; at the same time, the circular stainless steel sheet 321 also enhances the structural strength of the piston 3 and extends the service life of the fire extinguishing device.

[0075] At the same time, for example Figure 1 As shown, a second sealing ring 51 is fitted at the end of the threaded locking structure 5 away from the piston 3 to further seal the connection between the threaded locking structure 5 and the electrical box, preventing the fire extinguishing agent 9 or external pollutants from seeping in, ensuring suitability for energy storage scenarios with high vibration or large temperature differences, and achieving long-term stability.

[0076] Furthermore, in this embodiment, for example... Figure 1As shown, it also includes a detection device 8, which is installed outside the pipe body 1 and connected to the starting device 6 through a detection signal line 81.

[0077] The detection device 8, which is installed outside the tube body 1, can monitor the temperature of the battery pack or the gas concentration inside the electrical box in real time, triggering fire extinguishing in advance to prevent fires from happening. Furthermore, the detection device 8 is designed separately from the tube body 1, which makes it easier to optimize the installation position according to the battery pack structure.

[0078] Please refer to Figures 1 to 3 Embodiment three of this utility model is as follows:

[0079] An energy-storage spiral fire extinguishing device, based on the above-described embodiment one or two, in this embodiment, as follows: Figure 1 As shown, a feedback device 7 is also provided on the side of the threaded locking structure 5 facing the piston 3, and the feedback device 7 is connected to the starting device 6 for signal control.

[0080] In this embodiment, the feedback device 7 can monitor the position of the piston 3 or the release status of the fire extinguishing agent 9 in real time, and transmit the signal to the starting device 6 or the main control board to realize closed-loop control of the fire extinguishing process; at the same time, the feedback device 7 can also detect whether the fire extinguishing device has been successfully started to avoid secondary disasters caused by failure.

[0081] At the same time, for example Figure 1 As shown, the feedback device 7 is fixed on the side of the threaded locking structure 5 facing the piston 3 and located on the axis of the tube body 1, further ensuring that the piston 3 experiences balanced force during pushing, moves smoothly, and is less likely to get stuck inside the tube body 1. And as... Figure 3 As shown, the feedback device 7 has two closed metal springs 72 on the side facing the piston 3, and an insulating plastic sheet 73 is provided between the two closed metal springs 72. The end of the insulating plastic sheet 73 facing the piston 3 is fixedly connected to the piston 3 by a traction steel wire 74, and the end of the insulating plastic sheet 73 facing the threaded locking structure 5 is connected to the threaded locking structure 5 by a retractable spring 75.

[0082] In this embodiment, the separation action of the metal spring 72 and the insulating plastic sheet 73 simulates the normally open contact becoming normally closed. That is, by linking the traction steel wire 74 with the piston 3, physical feedback of the release state of the fire extinguishing agent 9 is achieved, which has strong anti-electromagnetic interference capability. At the same time, the retractable spring 75 allows the insulating plastic sheet 73 to reset after the fire is extinguished, which facilitates the reuse of the fire extinguishing device or the state reset.

[0083] Furthermore, in this embodiment, for example... Figure 1 As shown, the starting device 6 is connected to the power supply via the starting external wiring 61, and the feedback device 7 is connected to the main control board of the energy storage system via the feedback external wiring 71.

[0084] The external connection 61 for starting and the external connection 71 for feedback are connected to the power supply and the main control board respectively, supporting remote triggering and status monitoring of the energy storage system and adapting to intelligent energy storage system management. The seamless integration with the main control board of the energy storage system effectively enables the fire extinguishing device to work in coordination with other safety modules.

[0085] In summary, the energy-storage spiral fire extinguishing device provided by this utility model has the following beneficial effects:

[0086] 1. The structure is simple, and the spiral thread locking structure makes it easy to install and maintain and replace later, without having to remove the entire electrical box and disassemble the inside for maintenance.

[0087] 2. The signal connection between the gas generation device and the starting device, combined with the signal connection between the detection device and the starting device, can quickly generate high-pressure gas to push the piston after receiving an electrical signal, ensuring that the fire extinguishing agent in the pipe is released quickly through the nozzle, effectively suppressing the thermal runaway of the lithium battery in the battery pack.

[0088] 3. The feedback device is designed to monitor the piston position or the release status of the fire extinguishing agent in real time, and transmit the signal to the starting device or main control board to realize closed-loop control of the fire extinguishing process.

[0089] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An energy-storage spiral fire extinguishing device, characterized in that, Includes the tube body, nozzle, and piston; The nozzle is located at one end of the tube body, the piston is slidably installed in the tube body, and the other end of the tube body has a threaded locking structure; The space inside the tube between the nozzle and the piston stores a fire extinguishing agent. A gas generating device is provided in the space between the piston and the threaded locking structure inside the tube. A starting device is provided on the side of the threaded locking structure facing the piston. The gas generating device is connected to the starting device by signal control. The starting device is connected to an external power source.

2. The energy storage spiral fire extinguishing device according to claim 1, characterized in that, The nozzle is located on the circumferential surface of one end of the tube, and the spray direction of the nozzle is perpendicular to the circumferential surface of the tube.

3. The energy storage spiral fire extinguishing device according to claim 1, characterized in that, The piston includes a sealing pressure relief layer and a movable compression device; The sealing and pressure relief layer is matched with the inner wall of the tube body, and the movable extrusion device is fixed on the side of the sealing and pressure relief layer facing the nozzle.

4. The energy storage spiral fire extinguishing device according to claim 3, characterized in that, The sealing and pressure relief layer includes a first sealing ring and a circular stainless steel sheet; The first sealing ring is arranged around the circumference of the circular stainless steel sheet.

5. The energy storage spiral fire extinguishing device according to claim 1, characterized in that, A feedback device is also provided on the side of the threaded locking structure facing the piston; The feedback device is connected to the starting device via signal control.

6. The energy storage spiral fire extinguishing device according to claim 5, characterized in that, The feedback device has two closed metal springs on the side facing the piston, and an insulating plastic sheet is placed between the two closed metal springs. The end of the insulating plastic sheet facing the piston is fixedly connected to the piston by a traction steel wire, and the end of the insulating plastic sheet facing the threaded locking structure is connected to the threaded locking structure by a retractable spring.

7. The energy storage spiral fire extinguishing device according to claim 6, characterized in that, The feedback device is located on the axis of the tube.

8. The energy storage spiral fire extinguishing device according to claim 5, characterized in that, The starting device is connected to the power supply via an external starting wire; The feedback device is connected to the main control board of the energy storage system via an external feedback wiring connection.

9. The energy storage spiral fire extinguishing device according to claim 1, characterized in that, It also includes detection devices; The detection device is located outside the tube and is connected to the starting device via a detection signal line.

10. The energy storage spiral fire extinguishing device according to claim 1, characterized in that, A second sealing ring is fitted at the end of the threaded locking structure away from the piston.

Images