Fire extinguishing device and energy storage box

Abstract

The fire extinguishing device comprises a pressure storage tank filled with compressed inert gas, the pressure storage tank is communicated with one end of a one-way valve through an air supply pipe, the other end of the one-way valve is communicated with one end of a telescopic inflation pipe, and a flexible fire detection pipe is arranged on the outer side of the telescopic inflation pipe. One end of the flexible fire detection tube is hermetically connected with the surface of the one-way valve, the other end of the flexible fire detection tube is closed, a bag body filled with a liquid fire extinguishing agent is arranged in the flexible fire detection tube, and a pressure relief membrane is arranged at the position where the one-way valve is communicated with the telescopic inflation tube; when the fire extinguishing device is not started, the bag body is filled with a liquid fire extinguishing agent, and one side of the bag body tightly presses the telescopic inflation pipe in the contraction state to one side of the pressure relief membrane. According to the utility model, the spraying process of the liquid fire extinguishing agent can be accelerated, the fire extinguishing efficiency is improved, and the thermal runaway phenomenon of the battery can be continuously inhibited.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage box fire extinguishing, in particular to a fire extinguishing device and an energy storage box. Background Art

[0002] Energy storage is a key supporting technology for energy structure adjustment and power system transformation under the wave of new energy. As a new energy battery, lithium-ion batteries are not only more environmentally friendly but also have better performance. They are widely used in energy storage power stations. Lithium battery container energy storage box solutions are widely used in the access and consumption of new energy power generation, realizing distributed power generation and microgrid energy storage, frequency regulation and voltage regulation for power systems, and providing reliable power supply and power quality in the upgrade and transformation of distribution systems. However, during the storage process, lithium-ion batteries may experience thermal runaway due to the accumulation of heat released by their own chemical reactions or the influence of external heat sources, which seriously affects the safety performance of the energy storage box. At present, most energy storage boxes are equipped with corresponding fire extinguishing devices (such as liquid fire extinguishing agents) to solve the problem of battery thermal runaway. However, the liquid fire extinguishing agent of the fire extinguishing device cannot be sprayed out quickly during spraying, and the spraying rate is slow, resulting in low fire extinguishing efficiency. In addition, the fire extinguishing process of this liquid fire extinguishing agent cannot continuously suppress the occurrence of battery thermal runaway. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a fire extinguishing device and an energy storage box to solve the problems raised in the background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a fire extinguishing device, including a pressure storage tank filled with compressed inert gas, the pressure storage tank is connected with one end of a one-way valve through an air supply pipe, the other end of the one-way valve is connected with one end of a retractable inflation tube, a flexible fire detection tube is provided on the outside of the retractable inflation tube, one end of the flexible fire detection tube is sealed and connected with the surface of the one-way valve, and the other end is closed, a bag body filled with liquid fire extinguishing agent is provided in the flexible fire detection tube, and a pressure relief diaphragm is provided at the position where the one-way valve is connected to the retractable inflation tube; when the fire extinguishing device is not started, the bag body is filled with liquid fire extinguishing agent, and one side of the bag body presses the retractable inflation tube in a contracted state against one side of the pressure relief diaphragm.

[0005] Preferably, the liquid fire extinguishing agent is perfluorohexanone.

[0006] Preferably, one end of the telescopic inflatable tube is connected to the one-way valve and the other end is closed, and the telescopic inflatable tube is a rubber sleeve structure or a bellows structure.

[0007] In addition, the utility model discloses an energy storage box using the above-mentioned fire extinguishing device, including a box body and a battery arranged in the box body, a flexible fire detection tube is arranged above the battery, and a pressure storage tank is arranged inside or outside the box body.

[0008] Furthermore, the box body is a square structure, and a plurality of batteries are evenly arranged inside the box body, and the flexible fire detection tube is distributed in the form of a serpentine pipe or an S-shaped pipe above the battery.

[0009] Furthermore, the flexible fire detection tube is fixed to the top of the battery through a clamping block.

[0010] Furthermore, an exhaust hole is provided at the bottom of the box.

[0011] The beneficial effects of the utility model are as follows: after the inert gas enters the retractable inflatable tube, the retractable inflatable tube gradually extends from the original retracted state, and continuously pushes the bag body during the extension process, thereby quickly squeezing out the liquid fire extinguishing agent in the bag body, accelerating the spraying process of the liquid fire extinguishing agent, and improving the fire extinguishing efficiency; in addition, when the retractable inflatable tube of the utility model extends to the rupture position of the flexible fire detection tube, if there is still high temperature or flame outside, the retractable inflatable tube will also rupture at this position, so that the inert gas inside is sprayed out, and a second fire extinguishing process is carried out, which can play a role in continuously suppressing thermal runaway of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of a fire extinguishing device;

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of a box body of an energy storage box;

[0014] Figure 3 It is a schematic diagram of the installation structure of the air supply pipe, the pressure relief diaphragm, the retractable inflation pipe and the bag body when the fire extinguishing device is not activated;

[0015] Figure 4 It is a schematic diagram of the structure after the flexible fire detection tube and the bag body are ruptured after the fire extinguishing device is activated;

[0016] Figure 5 It is a structural schematic diagram of the telescopic inflation tube gradually extending from the original telescopic state after the pressure relief diaphragm is broken;

[0017] Figure 6 It is a schematic diagram of the structure after the telescopic inflatable tube is ruptured;

[0018] Figure 7 It is a structural diagram of the card block. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figure 1-7As shown, a fire extinguishing device comprises a pressure storage tank 1 filled with compressed inert gas, the pressure storage tank 1 is connected with one end of a one-way valve 3 through an air supply pipe 2, the other end of the one-way valve 3 is connected with one end of a telescopic inflation tube 4, a flexible fire detection tube 5 is arranged on the outside of the telescopic inflation tube 4, one end of the flexible fire detection tube 5 is sealed and connected with the surface of the one-way valve 3, and the other end is closed, a bag body 6 filled with liquid fire extinguishing agent is arranged in the flexible fire detection tube 5, and a pressure relief diaphragm 7 is arranged at the position where the one-way valve 3 is connected with the telescopic inflation tube 4; when the fire extinguishing device is not started, the bag body 6 is filled with liquid fire extinguishing agent, and one side of the bag body 6 presses the telescopic inflation tube 4 in a contracted state against one side of the pressure relief diaphragm 7.

[0021] Preferably, the liquid fire extinguishing agent is perfluorohexanone.

[0022] Preferably, one end of the telescopic inflation tube 4 is connected to the one-way valve 3 and the other end is closed, and the telescopic inflation tube 4 is a rubber sleeve structure or a bellows structure.

[0023] More preferably, the flexible fire detection tube 5 in this embodiment is the pipeline structure of the fire detection tube seen on the market.

[0024] In addition, the utility model discloses an energy storage box using the above-mentioned fire extinguishing device, including a box body 8 and a battery 9 arranged in the box body 8, a flexible fire detection tube 5 is arranged above the battery 9, and a pressure storage tank 1 is arranged inside or outside the box body 8.

[0025] Furthermore, the box body 8 is a square structure, and a plurality of batteries 9 are evenly arranged inside the box body. The flexible fire detection tube 5 is distributed in a serpentine or S-shaped pipe above the battery 9 (such as Figure 1 This distribution mode can maximize the fire detection range of the flexible fire detection tube 5.

[0026] Furthermore, if Figure 7 As shown, the flexible fire detection tube 5 is fixed to the top of the battery 9 by a clamping block 10. The flexible fire detection tube 5 can be fixed to the battery 9 by the clamping block 10 to prevent it from shifting during storage and transportation. As shown in the figure, the flexible fire detection tube 5 can be fixed by two upper and lower U-shaped grooves that match the surface of the flexible fire detection tube 5.

[0027] Further, an exhaust hole is also provided at the bottom of the box 8. After such design, the combustible gas and liquid inside the box 8 can be discharged from the exhaust hole in time to prevent the combustible gas and liquid from gathering in the box 8.

[0028] In addition, the utility model discloses a fire extinguishing method for the energy storage box, which comprises the following steps:

[0029] S1. When the temperature of the battery 9 in the energy storage box is too high or a fire occurs, the flexible fire detection tube 5 breaks at a position with a higher temperature (such as Figure 4 shown);

[0030] S2, the bag body 6 at the rupture position will also rupture due to the heat, so that the liquid fire extinguishing agent inside the bag body 6 flows out, starting the first fire extinguishing process (such as Figure 4 shown);

[0031] S3, after the liquid fire extinguishing agent in the bag body 6 flows out, the pressure relief diaphragm 7 loses pressure on one side of the retractable inflation tube 4. Under the action of the pressure difference on both sides, the pressure relief diaphragm 7 is broken by the inert gas in the air delivery tube 2 (such as Figure 5 shown);

[0032] S4, the inert gas enters the telescopic inflation tube 4, and the telescopic inflation tube 4 gradually extends from the original telescopic state, and continuously pushes the bag body 6 during the extension process, so that the liquid fire extinguishing agent in the bag body 6 is quickly squeezed out (such as Figure 5 As shown), the spraying process of the liquid fire extinguishing agent is accelerated; the liquid fire extinguishing agent in the bag body 6 itself has no pressure. If it is to be completely discharged from the bag body 6, an external thrust, such as a gas thrust or a mechanical pressure, is required. If the gas is used to directly push the liquid fire extinguishing agent in the bag body 6 to be discharged, it is very likely that part of the gas will be discharged directly from the rupture position, thereby leaking, resulting in a weakening of the gas thrust effect, and the liquid fire extinguishing agent cannot be quickly discharged from the bag body 6; therefore, the utility model adopts a mechanical pressure method, that is, the gas first enters the telescopic inflatable tube 4, and then the telescopic inflatable tube 4 is extended, so that the bag body 6 can be mechanically pushed, similar to the effect of piston pushing, so that when the telescopic inflatable tube 4 is extended to the rupture position of the flexible fire detection tube 5, the liquid fire extinguishing agent in the front section of the bag body 6 can be discharged immediately, and the fire extinguishing function can be quickly realized.

[0033] S5, when the telescopic inflatable tube 4 is extended to the rupture position of the flexible fire detection tube 5, if there is still high temperature or flame in the outside world, the telescopic inflatable tube 4 will also rupture at this position (such as Figure 6 As shown in the figure), the inert gas inside is ejected to carry out the second fire extinguishing process.

[0034] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A fire extinguishing device comprising a pressure storage tank (1) filled with compressed inert gas, characterized in that: The pressure storage tank (1) is connected to one end of the one-way valve (3) through the air supply pipe (2), and the other end of the one-way valve (3) is connected to one end of the telescopic inflation pipe (4). A flexible fire detection pipe (5) is provided on the outside of the telescopic inflation pipe (4). One end of the flexible fire detection pipe (5) is sealed and connected to the surface of the one-way valve (3), and the other end is closed. A bag (6) filled with liquid fire extinguishing agent is provided in the flexible fire detection pipe (5). A pressure relief diaphragm (7) is provided at the position where the one-way valve (3) and the telescopic inflation pipe (4) are connected. When the fire extinguishing device is not activated, the bag (6) is filled with liquid fire extinguishing agent, and one side of the bag presses the telescopic inflation pipe (4) in a contracted state against one side of the pressure relief diaphragm (7).

2. A fire extinguishing device according to claim 1, characterized in that: The liquid fire extinguishing agent is perfluorohexanone.

3. A fire extinguishing device according to claim 1, characterized in that: One end of the telescopic inflation tube (4) is connected to the one-way valve (3), and the other end is closed. The telescopic inflation tube (4) is a rubber sleeve structure or a bellows structure.

4. An energy storage box using the fire extinguishing device according to claim 1, comprising a box body (8) and a battery (9) arranged in the box body (8), characterized in that: A flexible fire detection tube (5) is provided above the battery (9), and a pressure storage tank (1) is provided inside or outside the box (8).

5. The energy storage box according to claim 4, characterized in that: The box (8) is a square structure, and a plurality of batteries (9) are evenly arranged inside the box. The flexible fire detection tube (5) is distributed above the battery (9) in the form of a serpentine pipe or an S-shaped pipe.

6. The energy storage box according to claim 4, characterized in that: The flexible fire detection tube (5) is fixed to the top of the battery (9) via a clamping block (10).

7. The energy storage box according to claim 4, characterized in that: The bottom of the box body (8) is also provided with an exhaust hole.

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