KR102449836B1 - Lithium-ion battery thermal runaway detection and fire extinguishing system using LN2 for ESS improved reliability - Google Patents

Abstract

The present invention relates to a fire extinguishing system for detecting a thermal runaway precursor of a lithium ion battery for improving ESS stability and using LN2, and more specifically, to a stability-based fire extinguishing system that detects a thermal runaway precursor in ESS facilities composed of lithium-ion batteries in advance and can minimize damage from explosions and fires by rapidly cooling the temperature of the lithium-ion batteries and the surrounding temperature by using LN2.

Description

Lithium-ion battery thermal runaway detection and fire extinguishing system using LN2 for ESS improved reliability

The present invention relates to a thermal runaway precursor detection of a lithium ion battery for improving ESS stability and a fire extinguishing system using LN2. It relates to a safety-based fire extinguishing system that can minimize damage from explosions and fires by rapidly cooling the temperature and ambient temperature of lithium-ion batteries using

An energy storage system (ESS) is a system that stores produced electrical energy in a battery and supplies it when power is needed, and is being introduced to reduce greenhouse gas emissions and alternatives to fossil fuels.

In other words, domestic and foreign investments related to renewable energy power generation facilities such as solar power generation and wind power generation are increasing, and the demand for ESS that stores the produced energy is rapidly increasing.

These ESSs mainly use high-efficiency lithium-ion batteries with high energy density. It consists of a rack unit, and in the case of ESS, it can be said that it is a large-scale facility that is concentrated in a rack unit. In addition, for efficient operation and safe management of ESS, power management system (PMS), energy monitoring system (EMS), power conditioning system (PCS), battery management system (Battery management) system; BMS), but as ESS-related fires continue to occur, the risk of ESS fire has emerged.

On the other hand, lithium-ion batteries have the advantage of high energy density and light weight, but because they use a flammable electrolyte, they are sensitive to temperature, have a large capacity decrease during overdischarge, and become very unstable when overcharged, resulting in an explosion due to a short circuit of the internal electrode or an external shock. And there are fatal disadvantages that threaten the safety of the system, such as leading to a fire.

In particular, in order to extinguish a fire in a lithium-ion battery, a thermal runaway phenomenon in which an oxidizing anode and a reducing anode meet and rapidly heat themselves due to the collapse of the polymer separator and continuous recurrence through fire propagation to adjacent cells Reignition must be prevented, but the existing fire extinguishing facilities are insufficient to expect the function to rapidly lower the high temperature generated during thermal runaway.

Therefore, as the supply of ESS increases, the need for a dedicated firefighting facility must increase, but research and development of a dedicated firefighting system is insufficient so far.

Registered Patent 10-2050803

The present invention was created to solve the problems in the prior art in consideration of the above problems, by detecting in advance the thermal runaway precursor phenomenon of an ESS facility composed of a lithium ion battery, and rapidly cooling the temperature and ambient temperature of the lithium ion battery using LN2 The purpose of this is to provide a safety-based fire extinguishing system that can minimize damage from explosions and fires.

The present invention is a means for achieving the above object, the ESS is built-in housing rack; a temperature sensor installed in the housing rack and outputting temperature information by measuring the ambient temperature of the ESS; a cooling unit for spraying a cooling material into the housing rack; And, based on the temperature information measured by the temperature sensor, comparing the measured temperature with a preset threshold temperature, when the measured temperature is determined to be above the critical temperature, output a cooling signal to inject the cooling material into the housing rack, the operation of the cooling unit It includes; a control unit for controlling, the cooling material is characterized in that LN2 (liquid nitrogen).

In addition, the rear surface of the housing rack is formed open, and a plurality of unit ESS modules are stacked inside, and the cooling unit sprays a cooling material between the unit ESS modules spaced up and down.

In addition, the cooling unit, the base fixed to support the housing rack to the upper surface and guide rails are formed along the front and rear longitudinal direction on the upper surface; a casing connected to the guide rail and coupled to be reciprocally movable in the front-rear direction, the front surface of which is open, and the long hole formed through the upper surface in the front-rear direction; a spray member embedded in the casing, connected to a cylinder in which the cooling material is compressed and stored, receiving the cooling material, and spraying the cooling material in a gaseous phase under the control of the control unit; a diffusion fan installed on the front surface of the casing to diffuse the cooling material sprayed from the spray member; a sealing member configured to seal between the casing and the housing rack; and an actuator installed between the casing and the base and extending or compressing under the control of the control unit to reciprocate the casing and the injection member in the front-rear direction; wherein the control unit simultaneously moves the casing and the injection member forward to control the actuator so that the front surface of the casing is in close contact with the rear surface of the housing rack, and at the same time, control the injection member so that the cooling material is sprayed.

In addition, the sealing member, a first permanent magnet formed along the front edge of the casing; and a second permanent magnet having a polarity opposite to that of the first permanent magnet and formed along the rear edge of the housing rack in a shape symmetrical to the first permanent magnet, wherein the injection member is directly connected to the cylinder and the a vertical pipe that passes through the long hole and is vertically disposed inside the casing; a plurality of horizontal pipes branched forward on the path of the vertical pipe; injection nozzles formed in each of the plurality of horizontal pipes; and a control valve for controlling opening and closing of each of the plurality of horizontal pipes under the control of the controller.

In addition, the lower end of the vertical pipe is formed with a caster supported so as to be able to roll on the inner lower surface of the casing, the upper and lower supports are formed to protrude toward the front, respectively, and the upper and lower ends of the front of the casing are formed with locking protrusions, , An elastic spring for elastically pressing the injection member to the rear is interposed between the support and the locking jaw, and the actuator is connected to a vertical pipe to move the casing and the injection member in the front-rear direction at the same time, the casing is the housing rack When it is further extended in a state of contact with the injection member, the whole of the injection member moves forward inside the casing, and the horizontal pipe is interposed between the unit ESS modules adjacent up and down, and the inside of the housing rack and the base communicate with each other, and at one side of the base An exhaust port is formed, and an exhaust fan for sucking and discharging the cooling material sprayed into the housing rack in the direction of the exhaust port is installed inside the base.

The present invention detects in advance the thermal runaway precursor phenomenon of an ESS facility composed of lithium ion batteries and rapidly cools the temperature and ambient temperature of the lithium ion battery using LN2 to minimize damage to phosphorus and material resources from explosions and fires. provides an effect.

1 is a block diagram showing the configuration of a fire extinguishing system using LN2 and thermal runaway detection of a lithium-ion battery for improving ESS stability according to the present invention.
2 is a view showing a schematic cross-sectional configuration of a fire extinguishing system using LN2 and thermal runaway precursor detection of a lithium-ion battery for improving ESS stability according to the present invention.
Figure 3a is a view schematically showing the front configuration of the housing rack, Figure 3b is a casing.
4 is a view schematically showing a cross-sectional configuration based on the line AA shown in FIG. 3B.
5 to 6 are diagrams for explaining the operation of the fire extinguishing system using LN2 and detection of thermal runaway precursor of a lithium-ion battery for improving ESS stability according to the present invention.
7 is a view showing the flow of the cooling material with a dashed-dotted line.

Objects, features and advantages of the present invention described above will become more apparent through the following examples in conjunction with the accompanying drawings. The following specific structural or functional descriptions are only exemplified for the purpose of describing embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms, and the implementation described herein It should not be construed as being limited to the examples.

Since the embodiment according to the concept of the present invention may have various changes and may have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific disclosed form, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms such as first and/or second may be used to describe various elements, but the elements are not limited to the terms. The above terms are used only for the purpose of distinguishing one component from other components, for example, without departing from the scope of rights according to the concept of the present invention, a first component may be named as a second component, and similar The second component may also be referred to as the first component.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle. Other expressions for describing the relationship between elements, that is, expressions such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. As used herein, terms such as “comprise” or “have” are intended to designate the presence of an embodied feature, number, step, action, component, part, or a combination thereof, but one or more other features or numbers, It should be understood that the possibility of the presence or addition of steps, operations, components, parts or combinations thereof is not precluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present specification. does not

The fire extinguishing system (hereinafter referred to as the fire extinguishing system) using LN2 and detection of thermal runaway precursors of lithium-ion batteries for improving ESS stability according to the present invention detects the thermal runaway precursor of battery modules constituting the ESS around the ESS in real time. Monitoring, and when a thermal runaway precursor occurs, as a follow-up measure, the ESS is cooled quickly to prevent it from leading to a fire so that the initial fire suppression can be performed more effectively. , and to minimize material damage.

That is, the fire extinguishing system according to the present invention enables more stable operation of the ESS by integrally configuring the fire extinguishing cooling circuit for thermal runaway detection and thermal runaway suppression of the battery module around the ESS.

To this end, the fire extinguishing system according to the present invention may be largely defined as including a housing rack 20 , a temperature sensor 30 , a cooling unit 100 and a control unit 40 as shown in FIG. 1 .

First, the housing rack 20 may have an ESS built therein. At this time, the ESS may be accommodated and installed inside the housing rack 20 as a plurality of unit ESS modules 10 , and each unit ESS module 10 may be understood as a collective configuration of battery modules.

Inside the housing rack 20, a plurality of shelves 21 are formed in the vertical direction so that a plurality of unit ESS modules 10 can be stacked in the vertical direction, and the unit ESS modules 10 are placed on each shelf 21. This allows them to be individually stacked.

At this time, the shelf 21 can partially support only a portion of the lower surface of the unit ESS module 10, for example, only the left and right corners so that the facing surfaces of the unit ESS module 10 facing up and down can communicate. .

Accordingly, when the cooling material is injected from the cooling unit 100 to be described later, the injected cooling material is injected between the unit ESS modules 10 spaced up and down, and then has a sufficient contact area with the upper surface of the unit ESS module 10 and It is possible to make even contact with the lower surface.

The housing rack 20 is made in the form of an enclosure, the front side may be provided with an openable and openable door, and the rear side may be formed to be open at all times.

A cooling unit 100 to be described later is selectively coupled to the open rear surface of the housing rack 20, and when the thermal runaway phenomenon of the ESS occurs, a cooling material for cooling the ESS can be sprayed into the housing rack 20. prepared to be

Next, the temperature sensor 30 is installed in the housing rack 20 and serves to measure the ambient temperature of the ESS and transmit the temperature information to the control unit 40 . In this case, the temperature information may be a real-time temperature around the ESS measured by the temperature sensor 30 .

A plurality of temperature sensors 30 may be provided to measure the temperature of each of the plurality of unit ESS modules 10 , and accordingly, overheating of a specific unit ESS module 10 can be detected.

Next, the control unit 40 is a configuration for controlling the operation of the cooling unit 100, and electrically connects each configuration of the temperature sensor 30 and the cooling unit 100 to a power source so that power can be applied, , the control signal of the control unit 40 has a structure so that it can be transmitted to each component.

For example, the controller 40 compares the measured temperature with a preset critical temperature based on the temperature information measured by the temperature sensor 30 and when the measured temperature is determined to be above the critical temperature, the cooling material is sprayed into the housing rack 20 It is possible to control the operation of the cooling unit 100 as possible. At this time, the critical temperature may be appropriately preset on the control unit 40 within the range of 60˚C to 70˚C.

Next, the cooling unit 100 is configured to suppress the spread of the thermal runaway of the ESS into a fire by injecting a cooling material into the housing rack 20 at an early stage, and is operated by the control unit 40, The cooling action of the ESS can be selectively performed only during thermal runaway of the ESS.

In this case, LN2 (liquid nitrogen) may be used as the cooling material injected from the cooling unit 100 . When LN2 is injected from the cooling unit 100, in the process of phase change of the injected LN2 to gaseous (nitrogen gas), an effect of cooling the outer surface of the ESS by absorbing heat of vaporization is provided.

Accordingly, the temperature of the overheated ESS can be rapidly lowered, and no special chemical or physical harm is applied to the battery module, enabling the ESS to operate normally even after extinguishing the fire.

More specifically, the cooling unit 100 is large, as shown in FIGS. 2 to 5 , a base 110 , a casing 120 , a spraying member 140 , a diffusion fan 150 , a sealing member 130 and It may be illustrated as including an actuator 160 .

First, the base 110 has a structure in which the housing rack 20 is fixed to the upper portion and the guide rail 111 is formed on the upper surface in the front and rear longitudinal direction.

A casing 120 is connected to the guide rail 111 and may be coupled to be reciprocally movable in the front-rear direction.

That is, the housing rack 20 is fixedly installed in front of the upper surface of the base 110 , whereas the casing 120 reciprocates from the upper surface of the base 110 toward the housing rack 20 to the housing only when the ESS is overheated. The rack 20 and the connection coupling can be made.

The base 110 is made of an empty enclosure type piping structure, and at this time, the inside of the housing rack 20 and the base 110 may communicate with each other.

For example, a first communication hole 22 is formed through the lower surface of the housing rack 20 , and a second communication hole 112 passes through the upper surface of the base 110 at a position corresponding to the first communication hole 22 . It is formed so that the inside of the housing rack 20 and the base 110 communicate with each other to constitute one channel.

And, an exhaust port 113 may be formed on one side of the base 110, and a discharge fan 114 for sucking and discharging the cooling material sprayed into the housing rack 20 in the direction of the exhaust port 113 is provided therein. can be installed.

Accordingly, the cooling material injected into the housing rack 20 is sucked into the base 110 following the lower housing rack 20 by the suction force of the exhaust fan 114, and then exhausted to the outside through the exhaust port 113. processed to prevent the housing rack 20 from remaining inside.

Meanwhile, a fixing bracket 115 for fixing and installing an actuator 160 to be described later may be formed on the rear of the upper surface of the base 110 .

Next, the casing 120 has a structure in the form of an empty housing, and a guide member 121 connected to the guide rail 111 is provided on the lower surface of the base 110 in a state connected to the guide rail 111. It may be coupled so as to reciprocate in the forward and backward directions.

The front surface of the casing 120 may be opened, and a spray member 140 to be described later may be installed therein.

The open front of the casing 120 may be connected and coupled adjacently to the open rear of the housing rack 20 according to the movement in the housing rack 20 direction of the casing 120, and the injection member 140 installed therein. ) is provided with a structure that allows the cooling material to be sprayed toward the inside of the housing rack 20 .

At this time, the sealing member 130 is configured to seal between the casing 120 and the housing rack 20 in contact with each other so that the sprayed cooling material does not flow into the gap between the housing rack 20 and the casing 120 . do.

The sealing member 130 has, for example, a first permanent magnet 131 formed along the front edge of the casing 120 and a polarity opposite to that of the first permanent magnet 131 and the first permanent magnet 131 . ) and may be exemplified by the second permanent magnet 132 formed along the rear edge of the housing rack 20 in a symmetrical shape. Accordingly, the first permanent magnet 131 and the second permanent magnet 132 strongly adhere to the front surface of the casing 120 and the rear surface of the housing rack 20 by magnetic force, respectively, and at the same time close the space between them. To effectively prevent leakage of cooling material. It is revealed that the sealing member 130 may be formed of a conventional O-ring in addition to the above-mentioned matters.

A long hole 122 may be formed through the upper surface of the casing 120 in the front-rear direction, and a vertical pipe 141 of the injection member 140 to be described later may pass through the long hole 122 .

On the other hand, the injection member 140 installed inside the casing 120 can be relatively moved in the front-rear direction in the casing 120, at this time, the long hole 122 allows the movement of the vertical pipe 141 moving in the front-rear direction. and guide.

Locking jaws 123 may be formed on the front top and bottom of the opened casing 120 , and an elastic spring 145 to be described later may be supported on the locking jaws 123 .

Next, the injection member 140 is connected to a cylinder (not shown) in which the cooling material is compressed and stored, receives the cooling material, and plays a role of spraying the cooling material in a gaseous phase.

At this time, the injection operation of the injection member 140 may be controlled under the control of the control unit 40 so as to be performed only when the thermal runaway of the ESS is detected.

More specifically, the injection member 140 is directly connected to the cylinder and passes through the long hole 122 to the vertical pipe 141 and the vertical pipe 141 disposed long in the inside of the casing 120 in the vertical direction. A plurality of horizontal pipes 142 branched to and controlled opening and closing of each of the plurality of horizontal pipes 142 under the control of the injection nozzles 143 and the control unit 40 formed in each of the plurality of horizontal pipes 142 It may be exemplified as including a control valve 144 to.

Although not shown, a pump for pumping the cooling material may be coupled on the tube of the cylinder or the vertical pipe 141, and the cooling material stored in the cylinder is sucked into the vertical pipe 141 and then each horizontal pipe 142 ) and may be sprayed to the outside through the spray nozzle 143 .

At the lower end of the vertical pipe 141, a caster 141a supported to be rollable on the inner lower surface of the casing 120 may be formed, and a support 141b may be formed to protrude toward the front at the upper and lower portions, respectively.

The caster 141a stably supports the vertical pipe 141 so that relative movement can be made within the casing 120 when the injection member 140 itself moves in the front-rear direction, and each support 141b is a casing. The elastic spring 145 may be interposed between the support 141b and the locking jaw 123 so as to face each of the locking jaws 123 provided on the 120 .

The elastic spring 145 serves to elastically press the injection member 140 to the rear, and accordingly, the injection member 140 is pushed forward by the actuator 160 to be described later, until the casing 120. It is possible to maintain the state inserted and accommodated therein, so that it can be accommodated in the casing 120 by returning the injection member 140 moved to the front back to the original position.

A plurality of each horizontal pipe 142 may be arranged so as to be symmetrical left and right as shown in FIG. 4 as well as a plurality of horizontal pipes 142 arranged at equal intervals up and down, and in this case, each horizontal pipe 142 is 'a' It can be formed by bending in a 'shape.

The horizontal pipe 142 is exposed to the front of the casing 120 according to the forward movement of the injection member 140 , and may be interposed between the vertically adjacent unit ESS modules 10 in the housing rack 20 .

The control valve 144 is provided at a corresponding location of each horizontal pipe 142 and plays a role of controlling the opening and closing of the pipe line of the horizontal pipe 142 . At this time, the control valve 144 may be formed of an electronically controlled solenoid valve, and the control unit 40 may control each control valve 144 individually or collectively.

When the control unit 40 controls the control valve 144 to open the conduit of the horizontal pipe 142 , the cooling material may be injected into the ESS through the injection nozzle 143 of the horizontal pipe 142 .

Next, the diffusion fan 150 is configured to diffuse the cooling material sprayed from the spray member 140 inside the housing rack 20, and a plurality of them are installed on the front surface of the casing 120 at equal vertical intervals. can

In this case, the diffusion fan 150 may be fixedly installed on the support bar 151 that crosses the front surface of the casing 120 from side to side.

When the diffusion fan 150 operates, the sprayed cooling material can be diffused over the entire space of the housing rack 20, and thus, not only the direct cooling of the ESS, but also the surrounding structures can be cooled, as a result A structure that can significantly improve cooling efficiency is provided.

Next, the actuator 160 is installed between the casing 120 and the base 110 and expands or compresses under the control of the controller 40 to reciprocate the casing 120 and the injection member 140 in the front-rear direction. responsible for moving

For example, the actuator 160 may use an electronically controlled hydraulic or pneumatic cylinder.

The right end of the actuator 160 may be fixedly installed on the fixing bracket 115 provided on the base 110 , and the left end may be connected and installed on the vertical pipe 141 through the casing 120 .

Even if the actuator 160 is connected to the vertical pipe 141 and installed, the locking jaw 123 of the casing 120 and the support 141b of the vertical pipe 141 are disposed to face each other, and elastic between them Since the spring 145 is interposed therebetween, when the actuator 160 expands or compresses, the casing 120 and the injection member 140 simultaneously move in the front-rear direction.

Hereinafter, the operation of the present invention will be described with reference to the accompanying drawings. In this operation, a series of processes in which the system operates as a follow-up measure when the thermal runaway precursor of ESS occurs will be briefly explained as an example.

First, in a state in which the housing rack 20 and the casing 120 are set to be spaced apart back and forth as shown in FIG. 2 , the temperature sensor 30 measures the temperature of the ESS, while the temperature measured by the temperature sensor 30 When a situation in which the information exceeds the preset threshold temperature occurs, the control unit 40 controls the operation of the cooling unit 100 to immediately cool the ESS.

For example, the control unit 40 moves the casing 120 and the injection member 140 forward at the same time as shown in FIG. 5 so that the front surface of the casing 120 is in close contact with the rear surface of the housing rack 20. (160) can be controlled.

When the casing 120 moves forward toward the rear of the housing rack 20 and is connected to the housing rack 20, the first permanent magnet 131 and the second permanent magnet 132 are in contact with each other by magnetic force to the casing 120. And the housing rack 20 is configured to be sealed, while the movement of the casing 120 can be stopped by being blocked by the fixed housing rack 20 .

At this time, when the actuator 160 is further extended while the casing 120 is in contact with the housing rack 20, in the case of the injection member 140 provided inside the casing 120, the movement is stopped as shown in FIG. It moves in the direction of the housing rack 20 relative to the casing 120. Accordingly, the injection member 140 moves forward inside the casing 120 so that the horizontal pipe 142 is vertically adjacent to the unit ESS module ( 10) can be interposed between them.

In this state, the control unit 40 controls the control valve 144 to open the conduit of the horizontal pipe 142 so that the cooling material can be sprayed.

The cooling material sprayed in this way and remaining in the housing rack 20 is recovered into the base 110 by the suction force of the exhaust fan 114 generated inside the base 110, and each unit ESS module ( 10), it can be exhausted to the outside through the exhaust port 113 so that it does not remain after being in contact.

The embodiments of the present invention described above are merely exemplary, and those of ordinary skill in the art to which the present invention pertains will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, it will be well understood that the present invention is not limited to the forms recited in the above detailed description. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and substitutions falling within the spirit and scope of the invention as defined by the appended claims.

10: ESS
20: housing rack
30: temperature sensor
40: control unit
100: cooling unit

Claims (5)

Based on the housing rack in which the ESS is built, a temperature sensor installed in the housing rack that measures the ambient temperature of the ESS and outputs temperature information, a cooling unit that sprays a cooling material into the housing rack, and the temperature information measured by the temperature sensor , Comparing the measured temperature with a preset critical temperature, when the measured temperature is determined to be higher than the critical temperature, outputting a cooling signal to the fire extinguishing system comprising a control unit for controlling the operation of the cooling unit so that the cooling material is injected into the housing rack,
The cooling material is LN2 (liquid nitrogen),
The rear surface of the housing rack is opened and a plurality of unit ESS modules are stacked inside, and the cooling unit is selectively coupled to the open rear surface of the housing rack to spray a cooling material between the unit ESS modules spaced up and down, ,
The cooling unit,
a base for fixing and supporting the housing rack upward and having guide rails formed on its upper surface in the front and rear longitudinal directions;
a casing connected to the guide rail and coupled to be reciprocally movable in the front and rear directions toward the fixed housing rack, the front is open, and the long hole is formed through the upper surface in the front and rear directions;
a spray member embedded in the casing, connected to a cylinder in which the cooling material is compressed and stored, receiving the cooling material, and spraying the cooling material in a gaseous phase under the control of the control unit;
a diffusion fan installed on the front surface of the casing to diffuse the cooling material sprayed from the spray member;
a sealing member configured to seal between the casing and the housing rack; and
and an actuator installed between the casing and the base and performing an extension or compression motion under the control of the controller to reciprocate the casing and the injection member in the front-rear direction.
The control unit controls the actuator so that the front of the casing is in close contact with the rear of the housing rack by moving the casing and the spraying member forward at the same time, and at the same time, controls the spraying member so that the cooling material is sprayed,
The sealing member,
a first permanent magnet formed along the front edge of the casing; and
and a second permanent magnet having a polarity opposite to that of the first permanent magnet and formed along the rear edge of the housing rack in a shape symmetrical to the first permanent magnet,
The spray member,
a vertical pipe that is directly connected to the bomb and is disposed long in the vertical direction inside the casing through the long hole;
a plurality of horizontal pipes branched forward on the path of the vertical pipe;
injection nozzles formed in each of the plurality of horizontal pipes; and
Includes; a control valve for controlling opening and closing of each of the plurality of horizontal pipes under the control of the control unit;
At the lower end of the vertical pipe, a caster supported so as to be rollable on the inner lower surface of the casing is formed, and at the upper and lower portions, supports are formed to protrude toward the front,
A locking jaw is formed on the front upper end and the lower end of the casing, and an elastic spring for elastically pressing the spray member to the rear is interposed between the support and the locking jaw,
The actuator is installed connected to the vertical pipe to move the casing and the injection member in the front and rear directions at the same time, and when the casing is further extended in a state in contact with the housing rack, the injection member as a whole moves forward inside the casing and the horizontal pipe It is interposed between the upper and lower adjacent unit ESS modules,
The base is made of an empty enclosure-type piping structure, a first communication hole is formed through the lower surface of the housing rack, and a second communication hole is formed through the upper surface of the base at a position corresponding to the first communication hole through the housing rack and The inside of the base communicates with each other to form one channel,
An exhaust port is formed on one side of the base, and an exhaust fan for sucking and discharging the cooling material injected into the housing rack in the direction of the exhaust port is installed inside the base, and the cooling material injected into the housing rack is the suction power of the exhaust fan After being sucked into the base following the lower part of the housing rack by the
A plurality of shelves are formed in the vertical direction so that a plurality of unit ESS modules can be stacked in the vertical direction inside the housing rack, and the unit ESS modules are individually stacked on each shelf,
The plurality of shelves partially support only the left and right corners of the unit ESS module so that the facing surfaces of the unit ESS module facing up and down can communicate with each other,
The casing has a structure in the form of an empty enclosure, and a guide member connected to the guide rail is provided on a lower surface of the casing and coupled to the base so as to be reciprocally moved in the front and rear directions while being connected to the guide rail, the open front surface of the casing is connected and coupled adjacent to the open rear of the housing rack as it moves in the direction of the housing rack,
The diffusion fan is fixedly installed on a support bar that crosses the front side of the casing from side to side,
The control unit is
When the temperature information measured by the temperature sensor exceeds a preset threshold temperature in a state in which the housing rack and the casing are spaced back and forth, the actuator moves the casing and the injection member forward at the same time so that the front of the casing is in close contact with the rear of the housing rack. control, and when the casing moves toward the rear of the housing rack and is connected to the housing rack, the first permanent magnet and the second permanent magnet come into contact with each other magnetically to form a hermetic seal between the casing and the housing rack, while the movement of the casing , when it is blocked by a fixed housing rack and stopped, the injection member provided inside the casing moves in the direction of the housing rack relative to the casing where the movement has stopped, so the entire injection member moves forward inside the casing, so that the horizontal pipe is vertically adjacent to the unit ESS module Interposed between, and in this state, by controlling the control valve to open the conduit of the horizontal pipe to control the operation of the cooling unit so that the cooling material is injected. Detection and Digestive system using LN2. delete delete delete delete

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