Outdoor energy storage battery box capable of automatically extinguishing fire

Abstract

The invention discloses an outdoor energy storage battery box capable of automatically extinguishing fire, and belongs to the technical field of battery fire extinguishment, the outdoor energy storage battery box comprises a square box body, a bottom plate is fixedly mounted at the bottom of the box body, supporting nets are fixedly mounted on the upper side of the bottom plate in parallel at intervals, and a cavity is formed in the inner side of the bottom plate; a cavity is formed in the bottom plate and used for containing dry powder and high-pressure gas at the same time, a spraying hole is formed in the upper side of the bottom plate, a spraying pipe with an opening in the upper end is installed in the spraying hole, a mass ball is installed in the spraying pipe in a rolling and sealing mode, a neck pipe used for limiting the mass ball is formed at the lower end of the spraying pipe, and a thin film is installed at a neck of the neck pipe. An elastic stretching device is connected between the neck opening pipe and the spraying pipe, and a pricking needle is installed at the bottom of the cavity corresponding to the neck opening pipe. According to the device and the method, when the energy storage battery is fished due to violent impact, the fire can be automatically extinguished, and the safety of the device during use is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery fire extinguishing, and particularly relates to an outdoor energy storage battery box that can automatically extinguish fires. Background Art

[0002] With the rapid development of renewable energy and the popularization of distributed energy systems, outdoor energy storage battery cabinets, as key devices for energy storage and release, are increasingly widely used in fields such as power systems, communication base stations, and electric vehicle charging stations. However, energy storage battery cabinets face many safety challenges during operation, and one of the most prominent problems is the fire risk caused by battery thermal runaway. Lithium-ion batteries have become the first choice for energy storage systems due to their high energy density, long cycle life, etc., but their inherent chemical properties make it possible for violent exothermic reactions to occur inside the battery under mechanical damage, leading to thermal runaway and triggering fires. Such fires can not only spread rapidly but also be accompanied by the release of toxic gases, posing a serious threat to the surrounding environment and personnel safety.

[0003] Traditional fire extinguishing methods, such as using dry powder fire extinguishers or gas fire extinguishing systems, although performing well in conventional fires, often have limited effects when dealing with battery fires. Battery fires are characterized by high re-ignition probability and great difficulty in extinguishing. Conventional fire extinguishing agents are difficult to effectively penetrate into the battery interior and cannot completely block the thermal runaway chain reaction. In addition, outdoor energy storage battery cabinets are usually installed in remote or unattended areas. Once a fire occurs, it is difficult to ensure the timeliness and effectiveness of manual intervention. Therefore, developing a self-extinguishing system that can automatically detect a fire and quickly implement fire extinguishing has become a key technical requirement for improving the safety of outdoor energy storage battery cabinets. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an outdoor energy storage battery box that can automatically extinguish fires, which can automatically extinguish fires when the energy storage battery is violently impacted and catches fire, ensuring the safety of the device during use.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: An outdoor energy storage battery box that can automatically extinguish fires disclosed by the present invention includes a square box body. A bottom plate is fixedly installed at the bottom of the box body. A support net is fixedly installed on the upper side of the bottom plate at parallel intervals. A cavity is formed inside the bottom plate, and the cavity is used to accommodate dry powder and high-pressure gas at the same time. Spray holes are formed on the upper side of the bottom plate. Spray pipes with open upper ends are installed in the spray holes. Quality balls are installed in the spray pipes in a rolling and sealed manner. A neck pipe for limiting the quality balls is formed at the lower end of the spray pipe. A film is installed at the neck of the neck pipe. An elastic stretching device is connected between the neck pipe and the spray pipe. A thorn needle is installed at the bottom of the cavity corresponding to the neck pipe.

[0006] Furthermore, the elastic stretching device includes a cylindrical rubber band, and limiting rings are formed at both ends of the rubber band. The limiting rings at both ends are respectively installed in the annular grooves formed inside the nozzle and the neck pipe.

[0007] Furthermore, a conical pipe is fixed inside the nozzle. The conical pipe is made of an elastic material, and a tapered hole with a smaller upper part and a larger lower part is formed inside the conical pipe.

[0008] Furthermore, limiting plates are installed on the upper side of the bottom plate at parallel intervals. First through holes corresponding to the nozzles one by one are formed on the limiting plates. A baffle is slidably installed between the bottom plate and the limiting plates. Second through holes corresponding to the nozzles one by one are formed on the baffle. The baffle is connected to the box body through a limiting device.

[0009] Furthermore, an opening groove is formed on the baffle. The limiting device includes a pre-tensioned spring and a bolt. The baffle is connected to the box body through the pre-tensioned spring, and the bolt is installed at the opening groove.

[0010] Furthermore, the box body includes a bottom box, an L-shaped plate fixedly installed in the middle of the upper side of the bottom box, a side plate and a top plate slidably installed on the side and top of the bottom box respectively. The inner side of the L-shaped plate faces the side where the side plate is located. The side plate and the top plate are simultaneously slidably matched with the inner and outer sides of the L-shaped plate, and expansion support members are installed on the side plate and the top plate simultaneously.

[0011] Furthermore, the expansion support member includes a guide rod, an end plate, an elastic spiral tube and a connecting pipe. One end of the guide rod is connected to the energy storage battery. The guide rod slides out of the side plate and is fixedly connected to the end plate. An elastic spiral tube is installed between the end plate and the side plate. The elastic spiral tube is communicated to the inner side of the box body through the connecting pipe.

[0012] Furthermore, a stepped hole is formed inside the side plate, and a conduit is fixedly installed in the stepped hole. The conduit is connected to the connecting pipe through a right-angle joint. An inner conical surface is formed inside the conduit. A pneumatic ball is installed inside the conduit. The pneumatic ball is connected to a bracket through a support spring, and the bracket is fixed inside the conduit.

[0013] Furthermore, a vortex chamber is formed inside the side plate. The vortex chamber is communicated with the inner cavity of the box body and the outside through an air inlet hole and an air outlet hole respectively. Both the air inlet hole and the air outlet hole are arranged along the circumferential direction of the vortex chamber.

[0014] Furthermore, a partition is fixed inside the top plate. The partition is used to separate adjacent energy storage batteries, and there is a gap between the partition and the bottom of the box body.

[0015] The beneficial effects of the present invention are as follows: An outdoor energy storage battery box capable of automatically extinguishing fire, disclosed by the present invention, installs a bottom plate with high-pressure gas and dry powder at the bottom of the box body. When the box body falls or is violently impacted, the mass ball moves downward under the action of inertia. The mass ball drives the wellhead pipe to displace together until the film is punctured by the thorn needle. At this time, the dry powder is sprayed into the box body from the spray pipe to extinguish the fire of the battery in the box body, prevent the spread of the fire, and improve the safety of the device during use.

[0016] Other advantages, objectives and features of the present invention will be elaborated in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a schematic structural diagram of the battery box of the present invention; Figure 2 is Figure 1 an enlarged view of part A in Figure 3 is Figure 1 an enlarged view of part B in Figure 4 is a schematic structural diagram of the box body; Figure 5 is a schematic structural diagram of the elastic spiral tube.

[0018] The reference signs in the drawings are as follows: box body 1, bottom plate 2, support net 3, cavity 4, spray hole 5, spray pipe 6, mass ball 7, neck pipe 8, film 9, thorn needle 10, rubber band 11, limit ring 12, conical tube 13, conical hole 14, limit plate 15, first through hole 16, baffle 17, second through hole 18, opening groove 19, pre-tension spring 20, bolt 21, bottom box 22, L-shaped plate 23, side plate 24, top plate 25, expansion support member 26, guide rod 27, end plate 28, elastic spiral tube 29, connecting pipe 30, stepped hole 31, conduit 32, right-angle joint 33, inner conical surface 34, pneumatic ball 35, support spring 36, bracket 37, vortex chamber 38, air inlet hole 39, air outlet hole 40, partition 41. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Such as Figures 1 to 5As shown in the figure, an outdoor energy storage battery box capable of automatic fire extinguishing disclosed by the present invention includes a square box body 1, the six sides of the box body 1 are closed, and at least energy storage batteries can be accommodated inside. A bottom plate 2 is fixedly installed at the bottom of the box body 1, and a support net 3 is fixedly installed on the upper side of the bottom plate 2 at parallel intervals for supporting the energy storage batteries. It can be understood that the support net 3 can not only play a supporting role, but its main purpose is also to allow the dry powder to normally enter the box body 1 when it is ejected, so as to avoid obstructing the dry powder.

[0020] Specifically, a cavity 4 is formed inside the bottom plate 2 disclosed by the present invention, and the cavity 4 is used to accommodate dry powder and high-pressure gas at the same time. Spray holes 5 are formed on the upper side of the bottom plate 2, and a spray pipe 6 with an open upper end is installed in the spray holes 5. A mass ball 7 is installed in the spray pipe 6 in a rolling and sealing manner. A neck pipe 8 for limiting the position of the mass ball 7 is formed at the lower end of the spray pipe 6, and a thin film 9 is installed at the neck of the neck pipe 8. Under normal conditions, the lower ends of the spray pipe 6 and the neck pipe 8 are closed by the thin film 9. An elastic stretching device is connected between the neck pipe 8 and the spray pipe 6, and the elastic stretching device provides an axial pre-tension force for the neck pipe 8. A thorn needle 10 is installed at the bottom of the cavity 4 corresponding to the neck pipe 8. When the thorn needle 10 contacts the thin film 9, it can pierce the thin film 9 sufficiently.

[0021] The elastic stretching device adopts a closed stretching device, and when it stretches slightly, it can also seal the interval between the neck pipe 8 and the spray pipe 6 to avoid the escape of high-pressure gas.

[0022] A fire extinguishing method for an outdoor energy storage battery box capable of automatic fire extinguishing: When the device is in normal use, the neck pipe 8 is closely attached to the spray pipe 6 under the action of the elastic pre-tension force of the elastic stretching device. At this time, there is a certain distance between the thin film 9 and the thorn needle 10. When the box body 1 falls or is violently impacted, the mass ball 7 moves downward under the action of inertia. After moving, the mass ball 7 drives the wellhead pipe to displace together until the thin film 9 is pierced by the thorn needle 10, opening the channel between the cavity 4 and the box body 1. The high-pressure gas quickly overflows from the spray pipe 6. At this time, the dry powder is sprayed into the box body 1 from the spray pipe 6, and the batteries in the box body 1 can be extinguished to prevent the spread of fire. With the device of the present invention, the pure mechanical structure operates more stably and is safe and reliable to use.

[0023] In this embodiment, the elastic stretching device includes a cylindrical rubber band 11. The rubber band 11 can be axially stretched. Limiting rings 12 are formed at both ends of the rubber band 11, and the limiting rings 12 at both ends are respectively installed in the annular grooves formed inside the spray pipe 6 and the neck pipe 8, which can play a certain limiting role. By setting the detachable rubber band 11, when the rubber band 11 ages, the device can be maintained in time, reducing the replacement cost.

[0024] In this embodiment, a conical tube 13 is fixedly installed inside the nozzle 6. The conical tube 13 is made of an elastic material. A tapered hole 14 with a smaller upper part and a larger lower part is formed inside the conical tube 13. The tapered hole 14 can play a certain limiting role on the mass ball 7, preventing the mass ball 7 from rolling out of the upper end of the nozzle 6 during small-amplitude vibrations. After the film 9 is punctured, the mass ball 7 can compress the conical tube 13, and then spray out from the tapered hole 14 and the nozzle 6, avoiding blockage of the pipeline and allowing the dry powder to smoothly enter the box body 1.

[0025] In this embodiment, limiting plates 15 are installed on the upper side of the bottom plate 2 at parallel intervals. First through holes 16 corresponding to the nozzles 6 one by one are formed in the limiting plates 15. A baffle 17 is slidably installed between the bottom plate 2 and the limiting plates 15. Second through holes 18 corresponding to the nozzles 6 one by one are formed in the baffle 17. The baffle 17 is connected to the box body 1 through a limiting device. When the limiting device is in the limiting state, the baffle 17 closes the nozzle 6, preventing the dry powder from overflowing and avoiding waste of the device caused by misoperation. When the device needs to be prepared for use, the limiting device is opened. At this time, the second through hole 18 corresponds to the nozzle 6 and the first through hole 16, and will not obstruct the dry powder. During specific use, an opening groove 19 is formed in the baffle 17. The limiting device includes a pre-tensioned spring 20 and a bolt 21. The baffle 17 is connected to the box body 1 through the pre-tensioned spring 20, and the bolt 21 is installed at the opening groove 19.

[0026] In this embodiment, the box body 1 includes a bottom box 22, an L-shaped plate 23 fixedly installed in the middle of the upper side of the bottom box 22, side plates 24 and a top plate 25 slidably installed on the side and top of the bottom box 22 respectively. The inner side of the L-shaped plate 23 faces the side where the side plate 24 is located. The side plate 24 and the top plate 25 are slidably matched with the inner and outer sides of the L-shaped plate 23 at the same time. Expansion support members 26 are installed on the side plate 24 and the top plate 25 at the same time. When the gas overflows from the bottom plate 2 into the box body 1, it can act on the expansion support members 26. The side plate 24 and the top plate 25 can displace towards the inner side of the box body 1 under the action of the expansion support members 26, compressing the internal space of the box body 1 and reducing the oxygen residue, which can achieve a better fire extinguishing effect.

[0027] In this embodiment, the expansion support member 26 includes a guide rod 27, an end plate 28, an elastic spiral tube 29 and a communication pipe 30. One end of the guide rod 27 is connected to the energy storage battery. The guide rod 27 slides out of the side plate 24 and is fixedly connected to the end plate 28. An elastic spiral tube 29 is installed between the end plate 28 and the side plate 24. The elastic spiral tube 29 is communicated with the inner side of the box body 1 through the communication pipe 30. When the high-pressure gas overflows from the bottom plate 2 into the box body 1, it can enter the elastic spiral tube 29 through the communication pipe 30. After the elastic spiral tube 29 expands, it can drive the side plate 24 and the bottom plate 2 to displace, thereby compressing the internal space of the box body 1.

[0028] In this embodiment, a stepped hole 31 is formed in the inner side of the side plate 24. A conduit 32 is fixedly installed in the stepped hole 31. The conduit 32 is connected to the communicating pipe 30 through a right-angle joint 33. An inner conical surface 34 is formed in the conduit 32. A pneumatic ball 35 is installed inside the conduit 32. The pneumatic ball 35 is connected to a bracket 37 through a support spring 36. The bracket 37 is fixed inside the conduit 32. By providing the conduit 32, the pneumatic ball 35 can discharge air unidirectionally. When the gas pressure in the elastic spiral tube 29 is greater than the gas pressure inside the box body 1, the gas will not return to the box body 1, ensuring the elastic support force of the elastic spiral tube 29.

[0029] In this embodiment, a scroll chamber 38 is formed in the side plate 24. The scroll chamber 38 is respectively communicated with the inner cavity of the box body 1 and the outside through an air inlet hole 39 and an air outlet hole 40. The air inlet hole 39 and the air outlet hole 40 are both arranged along the circumferential direction of the scroll chamber 38. By providing the scroll chamber 38, in a safe state, it can be used for air outlet to increase the air flow and thus dissipate heat from the battery. When the battery catches fire, the dry powder overflows from the air outlet hole 40 of the scroll chamber 38 along with the gas. The dry powder can accumulate in the scroll chamber 38 to block the air outlet hole 40, reducing the air flow and being more conducive to extinguishing the fire. In some other embodiments, an adhesive material can be provided in the scroll chamber 38 to be more conducive to the accumulation of the dry powder.

[0030] In this embodiment, a partition 41 is fixed to the inner side of the top plate 25. The partition 41 is used to separate two adjacent energy storage batteries. There is a gap between the partition 41 and the bottom of the box body 1. By providing the partition 41, the gap between the batteries can be increased to facilitate heat dissipation. When the top plate 25 moves downward to compress the space, the partition 41 can also compress the gap to prevent air flow.

[0031] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An outdoor energy storage battery box capable of automatic fire extinguishing, characterized in that: It includes a square box body. A bottom plate is fixedly installed at the bottom of the box body. A support net is fixedly installed on the upper side of the bottom plate at parallel intervals. A cavity is formed inside the bottom plate, and the cavity is used to accommodate dry powder and high-pressure gas at the same time. Spray holes are formed on the upper side of the bottom plate. Spray pipes with open upper ends are installed in the spray holes. A mass ball is installed in the spray pipe in a rolling and sealed manner. A neck pipe for limiting the mass ball is formed at the lower end of the spray pipe. A film is installed at the neck of the neck pipe. An elastic stretching device is connected between the neck pipe and the spray pipe. A thorn needle is installed at the bottom of the cavity corresponding to the neck pipe.

2. The outdoor energy storage battery box capable of automatically extinguishing fire according to claim 1, wherein: The elastic stretching device includes a cylindrical rubber band. Limiting rings are formed at both ends of the rubber band, and the limiting rings at both ends are respectively installed in the annular grooves formed inside the spray pipe and the neck pipe.

3. The outdoor energy storage battery box capable of automatic fire extinguishing according to claim 2, wherein: A conical pipe is fixed inside the spray pipe. The conical pipe is made of an elastic material, and a tapered hole that is smaller at the top and larger at the bottom is formed inside the conical pipe.

4. The outdoor energy storage battery box capable of automatic fire extinguishing according to claim 1, wherein: Limiting plates are installed on the upper side of the bottom plate at parallel intervals. First through holes corresponding to the spray pipes one by one are opened on the limiting plates. A baffle is slidably installed between the bottom plate and the limiting plates. Second through holes corresponding to the spray pipes one by one are opened on the baffle. The baffle is connected to the box body through a limiting device.

5. The outdoor energy storage battery box capable of automatic fire extinguishing according to claim 4, wherein: An opening groove is opened on the baffle. The limiting device includes a pre-tensioned spring and a bolt. The baffle is connected to the box body through the pre-tensioned spring, and the bolt is installed at the opening groove.

6. An outdoor energy storage battery box capable of automatic fire extinguishing according to any one of claims 1-5, characterized in that: The box body includes a bottom box, an L-shaped plate fixedly installed in the middle of the upper side of the bottom box, a side plate and a top plate that are respectively slidably installed on the side and top of the bottom box. The inner side of the L-shaped plate faces the side where the side plate is located. The side plate and the top plate are slidably matched with the inner and outer sides of the L-shaped plate at the same time. Expansion support members are installed on the side plate and the top plate at the same time.

7. An outdoor energy storage battery box capable of automatic fire extinguishing according to claim 6, characterized in that: The expansion support member includes a guide rod, an end plate, an elastic spiral tube and a connecting pipe. One end of the guide rod is connected to the energy storage battery. The guide rod slides out of the side plate and is fixedly connected to the end plate. An elastic spiral tube is installed between the end plate and the side plate. The elastic spiral tube is connected to the inner side of the box body through the connecting pipe.

8. The outdoor energy storage battery box capable of automatic fire extinguishing according to claim 7, wherein: A stepped hole is opened on the inner side of the side plate. A conduit is fixedly installed in the stepped hole. The conduit is connected to the connecting pipe through a right-angle joint. An inner conical surface is formed inside the conduit. A pneumatic ball is installed inside the conduit. The pneumatic ball is connected to a bracket through a support spring, and the bracket is fixed inside the conduit.

9. The outdoor energy storage battery box capable of automatic fire extinguishing according to claim 8, characterized in that: A vortex chamber is opened inside the side plate. The vortex chamber is respectively communicated with the inner cavity of the box body and the outside through an air inlet hole and an air outlet hole. Both the air inlet hole and the air outlet hole are arranged along the circumferential direction of the vortex chamber.

10. The outdoor energy storage battery box capable of automatic fire extinguishing according to claim 6, wherein: A partition is fixed on the inner side of the top plate. The partition is used to separate adjacent two energy storage batteries, and there is a gap between the partition and the bottom of the box body.

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