KR102473248B1 - Fire Targeting Injection System for Fire Extinguishing of Batteries - Google Patents

Abstract

The present invention relates to a targeting ejection system for improving the effect of extinguishing a battery fire, and more specifically, to a targeting ejection system including a distribution structure for maximizing the fire extinguishing effect when a fire occurs in an electric device, such as a lithium-ion battery of an energy storage system. The present invention strengthens the performance of an ESS fire extinguishing system to increase the efficiency of direct ejection. In addition, the cooling performance of a fire extinguishing apparatus by module of an ESS. The targeting ejection system according to the present invention improves a battery module, a thermo-sensitive tube, and a targeting ejection member disposed above the battery module, wherein the thermo-sensitive tube is inserted in the targeting ejection member.

Description

Local release system for fire extinguishing of batteries {Fire Targeting Injection System for Fire Extinguishing of Batteries}

The present invention relates to a local release system for improved fire extinguishing effect on a battery, and more particularly, distribution for maximizing the fire extinguishing effect in the event of a fire in an electric element heating element such as a lithium ion battery of an energy storage system (ESS) It relates to a localized release system comprising a structure.

Recently, the spread of an energy storage system (ESS), which stores energy in advance and uses it at a required time, is rapidly increasing. This ESS consists of a power storage source such as a Li-ion battery (LiB), a power control device (PCS, Power Conversion System), and an energy management system (EMS, Energy Management System). Lithium-ion batteries are vulnerable to fire due to high temperatures and heat.

The secondary battery may be used as a battery module formed of a plurality of unit battery cells connected in series and/or parallel to provide high energy density, for example, to drive a motor of a hybrid vehicle. That is, the battery module is formed by interconnecting electrode terminals of a plurality of unit battery cells in order to implement a high-output secondary battery according to the required amount of power. The battery module may be implemented in a block or modular manner. In the block-type implementation, each battery cell is coupled to a common current collector structure and a common battery management system. In the modular implementation, a plurality of battery cells are connected to form a sub-module, and a plurality of sub-modules are connected to form a battery module. The battery management function can be implemented at a module or sub-module level, thereby improving component compatibility. One or more battery modules are mechanically and electrically integrated, equipped with thermal management systems, and set up for communication with one or more electrical consumers to form a battery system.

According to the wide use and high capacity of lithium ion batteries, battery ignition accidents have been caused, and it has been shown that various fires occur if efficient cooling is not performed. In particular, fires caused by lithium-ion batteries have all the fire characteristics of A, B, C, and D classes, and have the characteristics of A-class general combustible fires as plastic materials such as separators and pouches burn. Unlike the secondary batteries of the past, it contains organic solvents corresponding to flammable liquids as electrolytes, so it also has the characteristics of class B oil fires. In addition, it can be classified as a C-class electric fire that can act as an ignition source because it has its own charged electrical energy, and it also has the characteristics of a D-class fire, which is a metal fire. Therefore, there is a problem that it is not easy to respond to ESS fires with complex characteristics, and moreover, lithium ion batteries show unique thermal runaway and reignition characteristics.

Thermal runaway is an example of an abnormal operating condition of a battery cell that can be reached by a lithium ion cell that is overheated or overcharged. The threshold temperature to enter thermal runaway is approximately 150° C. or higher and can be exceeded due to localized damage, such as internal shorting of a cell, which is the phenomenon of heating to adjacent cells from poor electrical contact or shorting. This thermal runaway generates large amounts of heat and gases until all available materials are consumed, during which faulty cells can heat up to temperatures above 700°C and release large amounts of hot gases into the system. Battery cells typically include vent openings that allow vent-gas jets to be released when a certain overpressure inside the battery is exceeded. A typical emitted vent-gas jet includes a gas velocity of 300 m/s and a temperature of about 500° C. for a cell case with a high energy density (about 200 wh/kg).

During thermal runaway, large amounts of heat can be transferred to neighboring cells by vent-gases. These cells are prone to thermal runaway because they are already heated by a failed cell due to heat conduction through the side plate, base plate or their electrical connectors. The result could be thermal runaway propagation across the entire cell system and cell fire or total loss of the electric vehicle.

According to the prior art, battery systems may include a fire extinguishing system that is started when the cell temperature exceeds a certain threshold. The actuating means for temperature sensing may include a melting fuse member configured to decompose above a temperature threshold. Since these actuating means are usually arranged close to or immediately adjacent to the battery cells, there is a high burden of false start-up of the fire extinguishing system. Most fire extinguishing systems operate irreversibly and are equipped with fluid extinguishing means. A false start can result in irreversible damage to the operating battery system or the need to replace the operating means. Known fire extinguishing systems require significant additional installation space and reduce energy efficiency by adding a lot of extra weight to the battery system.

Lithium-ion batteries suffer from thermal runaway due to internal chemical reactions. When a heat source is supplied for a special reason, the internal separator collapses, the electrolyte is vaporized, and thermal runaway accompanied by a rapid temperature rise and explosion occurs after an internal short circuit. Lithium-ion batteries have flammable and explosive electrolytes, and have the characteristics of re-ignition even after digestion due to heat generation and thermal runaway due to internal chemical reactions, and also emit toxic gases such as fluorine oxide. ESS has a problem in that high energy density lithium ion batteries are concentrated inside the enclosure of a sealed structure, so that it is difficult for the fire extinguishing agent to reach the source of fire even if the fire extinguishing agent is released from the outside in the event of a fire. The fire extinguishing equipment installed in the ESS includes an automatic solid aerosol fire extinguishing device, a cabinet-type automatic fire extinguishing device (HFC-125, HFC-227), and a clean fire extinguishing agent facility. , all of them are failing to extinguish the fire.

Therefore, it is confirmed that general fire extinguishing equipment is not applicable for ESS fire protection, and it is necessary to develop a new concept fire detection and suppression technology. For the stable use of ESS, a new fire suppression technology suitable for the system must be developed. Since ESS lithium-ion battery fires are different from general fires, it is difficult to extinguish them with general fire extinguishing devices (water, powder, gas, etc.). In order to effectively extinguish an ESS fire, a fire extinguishing device with excellent cooling effect and oxygen blocking effect must be used.

The local emission fire extinguishing system proposed in this patent is a technology that further enhances the performance of the existing ESS fire extinguishing system to enable efficient injection when direct injection is performed.

Korean Patent Application No. 10-2019-0009922 Japanese Patent Laid-Open No. 2019-075191 European Patent Publication No. 3460870 US Patent Publication No. 2019-0168038

An object of the present invention to solve the above problems is to further enhance the performance of the existing ESS fire extinguishing system through a local release fire extinguishing system to increase the efficiency of direct injection.

In addition, an object of the present invention is to maximize the cooling performance of the fire suppression device in units of modules of the ESS.

In addition, an object of the present invention is to provide a local release fire extinguishing system in which the vent port and the release position of the fire extinguishing agent are matched so that the fire extinguishing agent can be directly injected into the fire source when a fire occurs.

Another object of the present invention is to provide a fire suppression device capable of directly injecting an extinguishing agent into only a cell where a fire occurs by inserting a heat-sensitive tube into a localized release member having a fixed release position.

In addition, an object of the present invention is to provide a local release fire extinguishing system that can be applied to various types of batteries such as prismatic, pouch-type, and cylindrical batteries.

The problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

The configuration of the present invention for achieving the above object, a battery module in which a plurality of batteries (20, 30) erected in the vertical direction are disposed; a thermally sensitive tube (10) disposed above the battery module; A fire or heat generated in one or more of the battery modules melts and opens the heat-sensitive tube above the battery module, and the extinguishing agent in the heat-sensitive tube is released into the open space of the heat-sensitive tube to prevent the fire or generate heat. It provides a local release system for extinguishing a battery fire, characterized in that supplied by a battery.

A local emission member 100 is disposed above the battery module, and the heat-sensitive tube is inserted into the local emission member 100.

The local release member 100 is characterized in that a plurality of openings are formed.

The openings are: It is characterized in that the vertical drop (110) spaced apart from each other and facing downward.

The battery is a prismatic battery, and a vent hole 22 is formed above the prismatic battery 20, and the vertical drop hole 110 is provided for each prismatic battery 20. It is characterized by being located in the upper part.

The openings are: characterized in that they are expansion nozzles 120 that are spaced apart from each other and face downward and sideways.

The battery is a cylindrical battery, a plurality of the cylindrical batteries are disposed vertically and horizontally, the local emission member 100 is disposed in the vertical direction of the cylindrical batteries, and the expansion nozzle 120 is disposed in each cylindrical battery disposed in the vertical direction. It is formed to be located above it, and the expansion nozzle 120 is characterized in that the side is opened toward the transverse direction of the cylindrical batteries.

The expansion nozzle is characterized in that it includes a plurality of individual holes directed downward and sideways.

According to the present invention, there is an effect of further enhancing the performance of the ESS fire extinguishing system and increasing the efficiency of direct injection.

In addition, there is an effect of maximizing the cooling performance of the module-based fire suppression device of the ESS.

In addition, there is an effect that the vent port and the release position of the fire extinguishing agent can be matched to be directly released to the fire source in case of fire.

In addition, by inserting the heat-sensitive tube into the local release member applied to the release position, there is an effect that the fire extinguishing agent is directly injected only in the cell where the fire occurs.

In addition, there is an effect that can be applied to various types of batteries such as prismatic, pouch-type, and cylindrical batteries.

The effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below. .

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with specific details for carrying out the invention. It should not be construed as being limited to the matters described.
1 is a photograph showing a typical ESS fire accident and extinguishing state.
2 is a photograph showing a state in which a fire occurs in a lithium ion battery.
3 is a view showing a state in which a fire extinguishing agent is directly injected into a lithium ion battery module to extinguish a fire.
4 is a diagram showing an embodiment of a localized release system having a localized release member according to the present invention.
5 is a view showing a state in which a local emission member according to the present invention is covered with a heat-sensitive tube from a bottom surface.
6 is a view showing the vertical drop of the fire extinguishing agent into the vertical drop port of the local release member according to the present invention.
7 is a view showing a state in which the fire extinguishing agent is directly injected in the localized release system according to the present invention.
8 is a diagram showing another embodiment of a localized release system having a localized release member according to the present invention.
9 is a view showing a state in which a local emission member according to the present invention is covered with a heat-sensitive tube from a bottom surface.
10 is a view showing that the fire extinguishing agent is widely sprayed through the expanded spray hole of the local release member according to the present invention.
11 is a view showing a state in which the fire extinguishing agent is directly injected in the localized release system according to the present invention.

The above objects, features and advantages will become more apparent through the following detailed description in conjunction with the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs can easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, a preferred embodiment according to the configuration of the present invention will be described in detail with reference to the accompanying drawings.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

1 is a photograph showing a typical ESS fire accident and extinguishing state. Referring to FIG. 1, when a fire occurs in an ESS in which battery packs and battery modules are stacked, the fire extinguishing agent is usually sprayed over a wide area of the ESS rather than a local location, in which case the right side of FIG. As such, there is a problem in that the entire battery inside the ESS cannot be used because the fire extinguishing agent is applied to the battery pack and the battery module as a whole in a location where there is no fire.

In addition, in the ESS, since high energy density lithium ion batteries are concentrated inside an enclosure of a sealed structure, it is difficult for fire extinguishing agents randomly sprayed from the outside to reach the fire source. That is, there is a problem in that the fire extinguishing agent is not introduced properly to the local location where the actual fire occurred, and the fire extinguishing efficiency is also lowered or the fire suppression fails. Therefore, for ESS fire protection, it has been confirmed that general fire extinguishing equipment is not applicable, and it is necessary to develop a new concept fire detection and suppression technology.

2 is a photograph showing a state in which a fire occurs in a lithium ion battery, and FIG. 3 is a view showing a state in which a fire extinguishing agent is directly injected into a lithium ion battery module to extinguish the fire. Referring to Figures 2 and 3, for the above special fire detection and suppression, it is possible to utilize a suppression system using a dry cloth fire extinguishing agent direct injection (Direct injection) method. Re-ignition due to overcharging, which is the main cause of battery fires, that is, re-ignition due to thermal runaway, cannot be extinguished with general gas-based fire extinguishing equipment and solid aerosol extinguishing devices. Part. In order to extinguish a battery fire and control thermal runaway, when a fire occurs as shown in FIG. 2, the most efficient way to extinguish and cool the flame is only when the dry cloth fire extinguishing agent is directly injected and sprayed into the battery module as shown in FIG. to be. The present invention below is intended to enable such a direct injection method and to more accurately locally inject a fire extinguishing agent to a target location.

4 is a view showing an embodiment of a localized release system having a localized release member according to the present invention, and FIG. 5 is a view showing a state in which the localized release member according to the present invention is covered with a heat-sensitive tube from a bottom surface.

Referring to FIG. 4 , prismatic batteries 20 formed long in the transverse direction are arranged side by side in the longitudinal direction on the lower side, and thermally sensitive tubes 10 are positioned on the upper side in the longitudinal direction.

The prismatic battery 20 includes a case in the form of a rectangular box, and a vent 22 is formed in the center of the upper surface, and a plurality of battery cells are disposed therein. The vent 22 is a hole opened upward and becomes a path that can communicate with the battery cell on the inside.

Since the same plurality of prismatic batteries 20 are arranged vertically in line, the vents 22 are also positioned in a line, and the heat-sensitive tube 10 is positioned directly above where the vents 22 are located. . The heat-sensitive tube 10 is a heat-sensitive sensing tube that responds to heat, and when a fire occurs and the temperature rises above a certain temperature (usually 110 to 130 ° C), the corresponding position melts or ruptures, The fire extinguishing agent supplied under pressure into the heat-sensitive tube 10 functions to be discharged and sprayed to a corresponding position through the ruptured open space.

When a fire, thermal runaway, or overheating occurs in a battery cell in the prismatic battery 20, gas and heat are first discharged toward the vent 22 and transferred to the thermally sensitive tube 10 above. When the portion close to the discharged heat is overheated above a certain temperature, the heat-sensitive tube 10 melts or ruptures the location, and the fire extinguishing agent inside is discharged to the ruptured location and is directly injected into the vent 22 side. be able to

However, it is fortunate that the melted and ruptured part of the heat-sensitive tube 10 faces the vent 22, but in some cases, it is melted and opened first in another part or direction, and the fire extinguishing agent is directed toward the vent 22. There may be cases where it is not sprayed. At this time, the discharged fire extinguishing agent does not enter the inside of the prismatic battery 20, flows down along the outer case, or flows into the vent 22 of the wrong prismatic battery 20 where the fire does not occur, and the wrong battery may damage it.

In order to solve this problem, the pipe-shaped localized release member 100 is overlaid on the outside of the heat-sensitive tube 10 . The local release member 100, which can adopt a pipe as an embodiment, is preferably formed of metal, non-combustible, or flame-retardant material so that its shape does not change even at high temperature. A plurality of vertical drop holes 110 are formed in the local release member 100, and the vertical drop holes 110 are formed at regular intervals so as to be positioned directly above the vent hole 22.

The heat-sensitive tube 10 is inserted into the pipe, which is the local release member 100, to maximize the fire extinguishing agent release position and fire extinguishing effect. The heat-sensitive tube used in the existing fire extinguishing system is cut in the event of a battery fire and releases the pressurized extinguishing agent inside. The fire extinguishing agent fills the inside of the module, but the main purpose is to lower the ambient temperature rather than reaching the fire source directly. was Lithium-ion battery fires occur in the vent where the vent occurs, and the fire extinguishing effect can be maximized when the high-pressure extinguishing agent is released directly into the vent. By placing the perforated pipe 100 and inserting the heat-sensitive tube 10 inside the pipe, in the event of a fire, even if the heat-sensitive tube 10 inside the pipe 100 is ruptured or cut, it is guided by the hole in the pipe 100. The fire extinguishing agent is directly discharged through the vent (22) to maximize the fire extinguishing effect.

Referring to FIG. 5 , vertical drop holes 110 are arranged at regular intervals in the local emission member 100 covered on the outside of the heat sensitive tube 10, and through the vertical drop holes 110, the internal heat The outer surface of the sensitive tube 10 is exposed. When high heat or flame is ejected upward through the vent 22 from the lower side, it is heated and melted from the surface of the heat-sensitive tube 10 facing the vertical drop port 110, which is adjacent to the vertical drop port 110, will burst At this time, even if the rupture position is tilted or shifted, the local release member 100 made of a non-flammable and flame-retardant material that does not melt and does not deform in shape is a vertical drop facing the vent 22 to which the fire extinguishing agent is to be injected ( 110) maintains its shape and position, the fire extinguishing agent discharged by the rupture of the heat-sensitive tube 10 is guided along the inner surface of the local release member 100 to the adjacent vertical drop port 110 and can be discharged. there will be

6 is a view showing the vertical drop of the fire extinguishing agent through the vertical drop of the local release member according to the present invention, and FIG. 7 is a view showing a state in which the fire extinguishing agent is directly injected in the local release system according to the present invention.

Referring to FIG. 6, when a fire or overheating occurs in the prismatic battery 20 directly below the leftmost vertical drop port 110 of the prismatic battery 20 in the drawing, the vent port of the prismatic battery 20 As the hot air from 22 is discharged upward, the hot air is first drawn into the vertical drop hole 110 directly above and melts the thermally sensitive tube 10 at that position. At this time, even if the melting and rupture position does not face the vertical drop hole 110, and the vertical drop hole 110 maintains its orientation and position toward the vent hole 22, even if it is in an adjacent position or in another direction, the vent The fire extinguishing agent falls vertically (11) toward the sphere (22), and direct inflow is possible. In particular, since the vertical drop hole 110 maintains a certain distance and direction, it prevents the fire extinguishing agent from accidentally flowing into the vent 22 of the adjacent prismatic battery 20, and only a predetermined vertical drop hole 110 digestion is possible.

Referring to FIG. 7, when only the leftmost prismatic battery 20 among the prismatic batteries 20 is overheated or ignited, the surface of the thermally sensitive tube 10 located directly above is melted, and the fire extinguishing agent discharged through the portion It falls vertically through the vertical drop port 110 directly above and is put into the vent 22 of the leftmost prismatic battery 20 to proceed with local digestion. At this time, the heat-sensitive tube 10 on the upper side of the other prismatic battery 20 in the vicinity is not melted, and even if the melted part is directed to the other prismatic battery 20, the discharge path is limited by the local release member 100, resulting in local and efficient digestion becomes possible

8 is a view showing another embodiment of a localized release system having a localized release member according to the present invention, and FIG. 9 is a view showing a state in which the localized release member according to the present invention is covered with a heat-sensitive tube from a bottom surface.

Referring to FIG. 8 , a cylindrical battery 30 formed in a cylindrical shape is vertically disposed side by side in a longitudinal and transverse direction, and a thermally sensitive tube 10 is positioned above the cylindrical battery 30 in a longitudinal direction. Similarly, the outside of the heat sensitive tube 10 is covered with the localized emission member 100 .

The cylindrical battery 30 has a larger number of independent cases than the prismatic battery 20 due to the difference in shape from the prismatic battery 20 described above, and the thermally sensitive tube 10 is provided on both upper sides of each cylindrical battery 30 If an attempt is made to make corresponding arrangements such that the passes through, an excessive number of thermally sensitive tubes 10 are required.

For the efficient use of the heat-sensitive tube 10, the cylindrical battery 30 is defined as a group in the transverse direction, and the heat-sensitive tube 10 disposed in the center distributes the fire extinguishing agent by group for the entire transverse direction. allow it to spray.

Referring to FIG. 9 , the expansion nozzles 120 are arranged at regular intervals on the local emission member 100 covered on the outside of the thermally sensitive tube 10, and when the thermally sensitive tube 10 is covered, the expansion nozzles 120 Point downwards and to the sides. Through the expansion nozzle 120, the outer surface of the thermally sensitive tube 10 therein is exposed. The distance between the expansion nozzles 120 is preferably equal to the diameter of the cylindrical battery 30 so as to correspond to each center of the vertically arranged cylindrical battery 30 .

When a cylindrical battery 30 on the lower side is overheated or ignited, it will be melted and ruptured while being heated from the surface of the heat-sensitive tube 10 inside the expansion nozzle 120 adjacent to the plurality of expansion nozzles 120 . At this time, even if the rupture position is expanded or staggered, the local release member 100 made of a non-flammable and flame retardant material that does not melt and does not deform in shape is an extended nozzle 120 facing the cylindrical battery 30 group to which the fire extinguishing agent is to be sprayed. ), and the fire extinguishing agent discharged by the rupture of the heat-sensitive tube 10 is guided to the expansion nozzle 120 adjacent to the inner surface of the local release member 100 and discharged toward the corresponding group. can become

However, for efficiency, the cylindrical battery 30 on the transverse side is grouped, and the fire extinguishing agent is sprayed as a whole for that group. In the drawing, five cylindrical batteries 30 arranged horizontally form one group, and if overheating or fire occurs in any one cylindrical battery 30 at the corresponding position, at least five cylindrical batteries located in the row ( 30), fire extinguishing agent will be sprayed at the same time. Rather than spraying the fire extinguishing agent on all 25 cylindrical batteries 30 in the drawing or spraying it in an unexpected location or direction, the fire extinguishing agent is sprayed only on 5 cylindrical batteries 30, so in theory 20 other cylindrical batteries are extinguished Since the drug is not sprayed, unnecessary damage and breakage can be prevented. Of course, if the ignition spreads and the other groups of cylindrical batteries 30 are also overheated, the heat-sensitive tubes 10 in other parts are also ruptured, and the fire extinguishing agent can be simultaneously sprayed side by side from the expansion nozzles 120 in multiple positions. This will be operated by the same mechanism in the vertical drop hole 110 described above.

10 is a view showing that the fire extinguishing agent is widely sprayed through the expansion nozzle of the local release member according to the present invention, and FIG. 11 is a view showing a state where the fire extinguishing agent is directly injected in the local release system according to the present invention.

Referring to FIG. 10, when fire or overheating occurs in the cylindrical battery 30 directly below the leftmost expansion nozzle 120 in the drawing or in the lateral side of the cylindrical battery 30, the corresponding cylindrical battery 30 While the hot air from ) is discharged upward, the hot air is first drawn into the upper expansion nozzle 120 and melts the thermally sensitive tube 10 at that position. At this time, even if the location of melting and rupture is greatly expanded or deviated from the expansion nozzle 120, or slightly adjacent to or in a different direction, the expansion nozzle 120 maintains its orientation and position toward the cylindrical battery 30 in the row. , the fire extinguishing agent is extended and injected 12 toward the cylindrical battery 30 of the group, and direct injection is possible.

Compared to the vertical drop hole 110, the expansion nozzle 120 has a shape in which a laterally open area in the horizontal direction is expanded. Accordingly, the fire extinguishing agent injected at high pressure from the expansion nozzle 120 may be expanded and injected 12 not only directly downward but also to the side. Since the expansion nozzle 120 maintains a certain interval and lateral direction, it prevents the fire extinguishing agent from being mistakenly injected into the cylindrical battery 30 of another group in the adjacent longitudinal direction, and enables local fire extinguishing by group only in a predetermined horizontal line do.

Referring to FIG. 11 , when only one of the central five cylindrical batteries 30 is overheated or a fire occurs, the surface of the thermally sensitive tube 10 adjacent to the upper position is melted, and that part The fire extinguishing agent discharged through is ejected along the lower horizontal line through the lower expansion nozzle 120 and proceeds with local digestion. At this time, since the thermally sensitive tube 10 on the upper side of another cylindrical battery 30 in close proximity is not melted, the discharge path is limited by group of horizontal lines by the local release member 100, enabling local and efficient fire extinguishing.

The holes (vertical drop hole, extended spray hole) of the local release member 100 can be deformed into various shapes, and the shape of the hole of the pipe 100 into which the heat-sensitive tube 10 is inserted is changed to form various shapes or directions. May release extinguishing agent. When a circular hole is drilled, the fire extinguishing agent is released in the form of a straight line, and when a hole in a long shape such as a long hole is drilled, the fire extinguishing agent is released in a straight line. In the case of prismatic or pouch-type batteries, they can be drilled in line with the pipe hole in a form that is easy to contact the vent or battery surface, but in the case of cylindrical batteries, several batteries are densely packed and their shape is small, making it impossible to apply several at once . Therefore, it is possible to discharge high-pressure fire extinguishing agents in various directions by drilling a line-shaped horizontal or vertical hole or a plurality of holes toward the lower end of the pipe. That is, the expansion nozzle 120 may be formed by including a plurality of holes spaced apart at a certain angle toward the bottom and the side. In this case, the fire extinguishing agent is directly individually discharged by directly facing the cylindrical battery 30 at an individual position. And, there is an effect of enabling relatively high-pressure discharge.

While this specification contains many features, such features should not be construed as limiting the scope of the invention or the claims. Also, features described in separate embodiments of this specification may be implemented in combination in a single embodiment. Conversely, various features described in a single embodiment of this specification may be implemented in various embodiments separately or in combination as appropriate.

Although actions are described in a particular order in the figures, it should not be understood that such acts are performed in the particular order as shown, or that a series of sequential orders, or that all described acts are performed to achieve a desired result.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention to those skilled in the art to which the present invention belongs, and thus the above-described embodiments and It is not limited by drawings.

10: thermal tube 11: vertical drop
12: extended injection 20: prismatic battery
22: vent hole 30: cylindrical battery
100: local release member 110: vertical drop
120: expansion nozzle

Claims (8)

A battery module in which a plurality of batteries erected in a vertical direction are disposed;
a thermally sensitive tube disposed above the battery module;
The heat-sensitive tube on the upper side is melted and opened due to a fire or heat generated in one or more batteries of the battery module,
The fire extinguishing agent supplied into the heat-sensitive tube into the open space of the heat-sensitive tube is discharged to the fire or the battery that generates heat,
A local emission member is disposed above the battery module,
The heat-sensitive tube is inserted into the localized release member,
A plurality of openings are formed in the local release member,
The opening is:
Expansion nozzles spaced apart from each other and directed downward and sideways,
The battery is a cylindrical battery,
The cylindrical batteries are arranged vertically and horizontally,
The local emission member is disposed in the longitudinal direction of the cylindrical batteries,
The expansion nozzle is formed to be located above each cylindrical battery disposed in the longitudinal direction,
The expansion nozzle is open at the side toward the transverse direction of the cylindrical batteries,
The local release system for extinguishing a battery fire, characterized in that the fire extinguishing agent sprayed at high pressure from the expansion nozzle is expanded and sprayed directly downward and to the side.
delete delete delete delete delete delete According to claim 1,
The expansion nozzle is:
A localized release system for extinguishing a battery fire, characterized in that it comprises a plurality of individual holes facing downward or sideways.

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