Fire suppression system for electric vehicle parking lot

Abstract

The present invention comprises: a variable water tank section (110) provided on the floor surface of a parking area where an electric vehicle enters and is parked, which normally maintains a flat floor state but expands upward according to a control signal upon detection of fire signs or fire occurrence to form a flooded space (A) capable of containing fire extinguishing water; a variable shielding section (120) including a shielding sheet (121) made of basalt fiber material formed on the upper frame or ceiling of the variable water tank section (110) and, according to a control signal, covers the upper part of the variable water tank section (110) that has expanded upward to block the external spread of flames and harmful gases; a fire detection section (130) that detects fire signs and fire occurrence by measuring the off-gas concentration of the parking area where the electric vehicle is parked and the surface temperature of the electric vehicle; a fire extinguishing water spraying section (140) formed on the floor surface of the parking area and supplies fire extinguishing water to the flooded space (A) to flood the electric vehicle when the variable water tank section (110) expands upward; and a control signal generated according to the detection result of the fire detection section (130). A fire suppression system for an electric vehicle parking lot is disclosed, comprising a control unit (150) that controls the upward deployment of a variable water tank unit (110), shielding by a variable shielding unit (120), and the supply of fire extinguishing water by a fire extinguishing water spraying unit (140) in conjunction, thereby quickly sealing and isolating the electric vehicle at the fire indication stage and suppressing flooding to suppress the spread of flames, heat, and harmful gases, and blocking the transition to a large fire.

Description

Technology Field

[0001] The present invention relates to a fire suppression system for an electric vehicle parking lot that can prevent the spread of flames, heat, and harmful gases by rapidly sealing and isolating the electric vehicle at the fire indication stage and suppressing flooding, thereby blocking the transition to a large-scale fire. Background Technology

[0003] Typically, it is known that the time required for a thermal runaway to spread from an electric vehicle to another parked vehicle closest to it is about 1 minute and 15 seconds, and the time for the fire to spread to adjacent electric vehicles is about 2 minutes.

[0004] Accordingly, although the speed of fire spread varies depending on the battery characteristics, charge status, and structure of electric vehicles, it tends to spread relatively faster compared to conventional internal combustion engine vehicles; therefore, it is crucial to prevent the fire from escalating into a large-scale fire in its early stages.

[0005] Meanwhile, when a fire occurs in an electric vehicle parked indoors or outdoors, extinguishing the fire on-site with a suffocating blanket and a Class D fire extinguisher is ineffective, and the method of two people entering the burning vehicle with a heavy suffocating blanket within 1 minute and 15 seconds, into the flames where the fire is rapidly spreading and primary and secondary thermal runaway is occurring, poses a significant risk.

[0006] Therefore, technology is required to rapidly seal and isolate the electric vehicle at the fire indication stage and suppress flooding to inhibit the spread of flames, heat, and harmful gases. Prior art literature

[0008] Korean Published Patent Application No. 10-2023-0123216 (Device and method for monitoring fire during charging at an electric vehicle charging station, Aug. 23, 2023) Korean Registered Patent Application No. 10-2206523 (Electric vehicle license plate identification system for parking lots, Jan. 22, 2021) The problem to be solved

[0009] The technical problem that the concept of the present invention aims to solve is to provide a fire suppression system for electric vehicle parking lots that can prevent the spread of flames, heat, and harmful gases by rapidly sealing and isolating the electric vehicle at the fire indication stage and suppressing flooding, thereby blocking the transition to a large-scale fire. means of solving the problem

[0011] To achieve the aforementioned objective, an embodiment of the present invention comprises: a variable water tank section provided on the floor surface of a parking area where an electric vehicle enters and is parked, which normally maintains a flat floor state but expands upward according to a control signal upon detection of fire signs or fire occurrence to form a flooded space capable of containing fire extinguishing water; a variable shielding section including a shielding sheet made of basalt fiber material formed on the upper frame or ceiling of the variable water tank section and covering the upper part of the variable water tank section expanded upward according to the control signal to block the external spread of flames and harmful gases; a fire detection section that detects fire signs and fire occurrence by measuring the off-gas concentration of the parking area where the electric vehicle is parked and the surface temperature of the electric vehicle; and a fire extinguishing water spraying section formed on the floor surface of the parking area that supplies fire extinguishing water to the flooded space to immerse the electric vehicle when the variable water tank section expands upward. A fire suppression system for an electric vehicle parking lot is provided, comprising: a control unit that generates a control signal according to the detection result of the fire detection unit and controls the upward deployment of the variable water tank unit, shielding by the variable shielding unit, and the supply of fire extinguishing water by the fire extinguishing water spraying unit in conjunction.

[0013] Here, the variable water tank section may be composed of a plurality of pop-up panels that are embedded along the perimeter of the corresponding parking area and rise to a certain height according to the control signal to form a closed water barrier, and a first lifting module that raises and lowers the pop-up panels.

[0015] In addition, the pop-up panel may be composed of a water barrier formed of a shielding sheet and a waterproof coating layer made of basalt fiber material, and a support frame that supports the shape of the water barrier and is raised by the first lifting module.

[0017] In addition, the variable shielding section may be composed of a shielding sheet made of basalt fiber material covering the upper part of the upwardly deployed variable water tank section, and a second lifting module formed on the ceiling to raise and lower the shielding sheet in opposition to the upper part of the variable water tank section.

[0019] In addition, the variable shield is installed on the upper frame of the variable water tank and normally remains in a wound state on one side of the upper frame, but upon detection of signs of fire or occurrence of fire, it unfolds horizontally toward the other side of the upper frame in accordance with the control signal to cover the upper part of the variable water tank and block the external spread of flames and harmful gases.

[0021] In addition, the fire detection unit includes an off-gas detection sensor and a thermal imaging camera, and the control unit analyzes the pattern of time-series data by gas component collected from the off-gas detection sensor. When a venting stage, which is a precursor symptom of battery thermal runaway, is detected, the control unit controls the variable water tank and the variable shield to seal the electric vehicle and perform isolation. Subsequently, if an abnormal temperature exceeding a preset temperature rise rate is confirmed via the thermal imaging camera, the control unit controls the fire extinguishing water spray unit to supply fire extinguishing water to the flooded space.

[0023] In addition, the control unit can identify the state in which an electric vehicle is connected to the electric vehicle charger upon detection of signs of fire or occurrence of fire, control the remote circuit breaker of the distribution box supplying power to the electric vehicle charger to immediately cut off the charging power, transmit evacuation and relocation parking warning information to the terminals of the electric vehicle owner and adjacent electric vehicle owners in conjunction with an integrated management platform, and propagate the fire situation through a warning light and speaker above the parking area. Effects of the invention

[0025] According to the present invention, by linking off-gas detection and thermal imaging detection during the pre-thermal runaway stage of an electric vehicle battery, the speed of initial response can be increased by performing charging power cutoff, parking area sealing, isolation, and flood suppression. Additionally, by operating the variable water tank and the variable shielding unit in conjunction, the electric vehicle undercarriage and battery pack can be intensively cooled, thereby blocking the external spread of flames, heat, and harmful gases, as well as the transfer of fire to adjacent vehicles. Brief explanation of the drawing

[0027] FIG. 1 is a configuration diagram of a fire suppression system for an electric vehicle parking lot according to an embodiment of the present invention. Figure 2 illustrates an implementation diagram of the fire suppression system for an electric vehicle parking lot of Figure 1. Figure 3 illustrates an example of a variable shielding part of the fire suppression system for electric vehicle parking lots of Figure 2. Figure 4 illustrates another example of a variable shielding part of the fire suppression system for electric vehicle parking lots of Figure 2. Figure 5 illustrates the operation of an example of a variable shielding part of the fire suppression system for electric vehicle parking lots of Figure 3. Specific details for implementing the invention

[0028] Hereinafter, embodiments of the present invention having the aforementioned features will be described in more detail with reference to the attached drawings.

[0030] A fire suppression system for an electric vehicle parking lot according to an embodiment of the present invention comprises: a variable water tank section (110) provided on the floor surface of a parking area where an electric vehicle enters and is parked, which normally maintains a flat floor state but expands upward according to a control signal upon detection of fire signs or fire occurrence to form a flooded space (A) capable of containing fire extinguishing water; a variable shielding section (120) including a shielding sheet (121) made of basalt fiber material formed on the upper frame or ceiling of the variable water tank section (110) and covering the upper part of the variable water tank section (110) expanded upward according to a control signal to block the external spread of flames and harmful gases; a fire detection section (130) that detects fire signs and fire occurrence by measuring the off-gas concentration of the parking area where the electric vehicle is parked and the surface temperature of the electric vehicle; a fire extinguishing water spraying section (140) formed on the floor surface of the parking area and supplying fire extinguishing water to the flooded space (A) to flood the electric vehicle when the variable water tank section (110) expands upward; and according to the detection result of the fire detection section (130). The gist of the invention is to include a control unit (150) that generates a control signal to control the upward deployment of the variable water tank unit (110), shielding by the variable shielding unit (120), and the supply of fire extinguishing water by the fire extinguishing water spraying unit (140) in conjunction, thereby quickly sealing and isolating the electric vehicle at the fire indication stage and suppressing flooding to suppress the spread of flames, heat, and harmful gases, thereby preventing the transition to a large fire.

[0032] Hereinafter, with reference to the drawings, the fire suppression system for an electric vehicle parking lot with the aforementioned configuration will be described in detail as follows.

[0034] First, the variable water tank (110), with reference to FIGS. 1 and 2, is provided on the floor of a parking area where an electric vehicle enters and is parked. Normally, it maintains a flat floor condition, but when a fire sign or fire occurrence is detected by the fire detection unit (130), it is deployed upward from the floor according to a control signal from the control unit (150) to form a flooded space (A) of a certain height capable of containing fire extinguishing water, thereby suppressing the fire of the electric vehicle inside the flooded space (A).

[0035] Specifically, the variable water tank section (110) may be composed of a plurality of pop-up panels (111) that are embedded along the perimeter of the corresponding parking area as illustrated in FIGS. 2 to 5 and rise to a certain height according to a control signal to form a closed water barrier (111a), and a first lifting module (112) that raises and lowers the pop-up panels (111).

[0036] Here, the pop-up panel (111) may be composed of a water barrier (111a) formed of a shielding sheet (121) made of basalt fiber material and a waterproof coating layer, and a support frame (111b) that supports the shape of the water barrier (111a) and is raised by a first lifting module (112).

[0037] That is, the shielding sheet (121) is made of basalt fiber material, and due to its good heat resistance, flame retardancy, and mechanical strength, it can stably maintain its structural shape even in an environment where it is directly exposed to high-temperature flames, radiant heat, and harmful gases in the event of a fire, and the waterproof coating layer can block moisture from penetrating into the interior of the shielding sheet (121) even with continuous contact with fire extinguishing water, and prevent fire extinguishing water from leaking out or seeping in along the surface of the water barrier (111a), thereby improving the watertightness of the flooded space (A).

[0038] In addition, the shielding sheet (121) made of basalt fiber material has flexibility and good tensile strength, so that it is not easily damaged even when repeatedly unfolded or folded during the lifting process of the pop-up panel (111), and the waterproof coating layer improves the surface stain resistance and chemical resistance of the shielding sheet (121), thereby reducing performance degradation due to long-term use.

[0039] Additionally, the first lifting module (112) may include at least one of a cylinder driving method, a screw driving method, a link driving method, or a rack and pinion driving method to rapidly and stably raise the pop-up panel (111), and the control unit (150) may control the rising height and the timing of operation of each pop-up panel (111) in conjunction so that the flooded space (A) is formed at a uniform height.

[0040] Meanwhile, the support frame (111b) may be formed of stainless steel, galvanized steel, aluminum alloy, or flame-retardant fiber-reinforced composite material having good heat resistance, corrosion resistance, and flame retardancy so as to withstand the parking load and external impact of the electric vehicle, and may be stored in a state embedded within the floor surface in normal circumstances so as not to obstruct the entry and parking of the electric vehicle, and may further be provided with an elastic sealing member or a waterproof packing at the bottom of the water barrier (111a) or at the joint of the pop-up panel (111) to block the leakage of fire extinguishing water to the outside when the pop-up panel (111) is raised, thereby improving the watertightness of the flooded space (A).

[0041] Accordingly, the variable water tank section (110) can rapidly form a localized water tank structure on the outer edge of the parking area when a fire occurs, stably store fire extinguishing water inside the flooded space (A), and intensively cool the lower part of the electric vehicle and the area around the battery pack to suppress the spread of flames due to thermal runaway and the transfer of fire to adjacent vehicles.

[0042] Meanwhile, the variable water tank unit (110) further includes a water level detection sensor that detects the water level inside the flooded space (A) in real time, and a drainage control unit that controls the amount of water supplied by the fire extinguishing water spray unit (140) according to the detected water level information or directs excess water above the set water level to an external drainage line or storage tank, thereby maintaining the water level of the flooded space (A) within an appropriate range to ensure cooling efficiency for the lower part of the electric vehicle and the area around the battery pack while preventing unnecessary use of fire extinguishing water.

[0043] Additionally, the variable water tank unit (110) may further include a position detection sensor that detects whether the pop-up panel (111) has completed rising, and the control unit (150) may control the water supply of the fire extinguishing water spray unit (140) or the shielding operation of the variable shielding unit (120) to be performed in conjunction with the detection signal collected from each pop-up panel (111) when the flooded space (A) is completely formed, thereby preventing the fire extinguishing water from leaking to the outside in an incompletely unfolded state of the variable water tank unit (110).

[0045] Alternatively, the bottom surface of the variable water tank (110) or the inner side of the pop-up panel (111) may be configured to further include a plurality of wheel stoppers or fixing clamps that protrude upward in correspondence with the wheel position of the electric vehicle, and the wheel stoppers or fixing clamps may protrude in conjunction with the upward expansion of the variable water tank (110) or operate separately just before the vehicle begins to be submerged to restrict the forward, backward, or left-right movement of the electric vehicle, thereby preventing interference with the pop-up panel (111) caused by the vehicle rising, sliding, or shifting position during the process of filling the submerged space (A) with fire extinguishing water.

[0047] Next, the variable shielding section (120), with reference to FIGS. 1, 2, 3 and 5, includes a shielding sheet (121) made of basalt fiber material and is formed on the upper frame or ceiling of the variable water tank section (110). Depending on the control signal of the control section (150), it is deployed sideways or downwards to cover the upper part of the variable water tank section (110) which is deployed upwards to a certain height, thereby blocking the external spread of flames and harmful gases.

[0048] Specifically, as illustrated in FIGS. 2, FIGS. 3, and FIGS. 5, the variable shielding section (120) is installed on the upper frame of the variable water tank section (110). Normally, it is in a state where the shielding sheet (121) is wound on a winder (123) formed on one side of the upper frame. However, when a fire sign or fire occurrence is detected, it is deployed horizontally toward the other side of the upper frame via a drive module (124) in accordance with a control signal to cover the upper part of the variable water tank section (110) and block the external spread of flames and harmful gases.

[0049] Here, the shielding sheet (121) is formed of basalt fiber material and has good heat resistance, flame retardancy, and tensile strength, so that it can stably perform the upper shielding function with minimal damage or deformation even in an environment where it is directly exposed to high-temperature flames, radiant heat, and harmful gases in the event of a fire.

[0050] Additionally, the edges of both sides of the shielding sheet (121) may be configured to move along guide rails or guide grooves formed extending along the upper frame, and the shielding sheet (121) may be unfolded horizontally according to the rotational expansion of the driving module (124) driven by elastic force or a separate rotary motor, and a fastening part or locking part formed at the front end of the shielding sheet (121) that is selectively coupled to the other side of the upper frame, thereby suppressing sagging, detachment, or the occurrence of gaps when the shielding sheet (121) is fully unfolded. Here, the driving module (124) is composed of two linked rotary frames, and the rotary frames may be rotated and expanded by an elastic module or rotary motor provided in the joint area between the rotary frames.

[0051] Additionally, an elastic sealing member, a heat-insulating packing, or a heat-resistant gasket may be further provided at the perimeter of the shielding sheet (121) or at the contact portion corresponding to the upper frame, so as to block flames, heat, smoke, or harmful gases from leaking out when the shielding sheet (121) is unfolded.

[0053] Alternatively, as illustrated in FIG. 4, the variable shielding section (120) may be composed of a shielding sheet (121) made of basalt fiber material covering the upper part of the upwardly expanded variable water tank section (110), and a second lifting module (122) formed on the ceiling to raise and lower the shielding sheet (121) facing the upper part of the variable water tank section (110).

[0054] Here, the shielding sheet (121) is formed from basalt fiber material and has good heat resistance, flame retardancy, and tensile strength, so that it can maintain structural stability without easily burning or being damaged even in an environment where it is directly exposed to high-temperature flames, radiant heat, and harmful gases in the event of a fire, and if necessary, a flame-retardant coating layer, a waterproof coating layer, or a chemical-resistant protective layer can be further formed on the surface of the shielding sheet (121) to further improve durability against high-temperature environments, contact with moisture, and exposure to harmful gases.

[0055] Additionally, the second lifting module (122) may be configured to lift the shielding sheet (121) by including at least one of a cylinder drive method, a wire hoisting method, a chain drive method, a screw drive method, or a scissor lifting method, and guides (122a) that guide the descending path are further provided on both sides of the shielding sheet (121) so that the shielding sheet (121) can descend stably toward the upper part of the variable water tank (110) without twisting or deflection.

[0056] Additionally, an elastic sealing member, a heat-insulating packing, or a heat-resistant gasket may be further provided at the contact portion corresponding to the perimeter of the shielding sheet (121) or the upper frame of the variable water tank (110), so that when the shielding sheet (121) is lowered, it is in close contact with the upper perimeter of the variable water tank (110) to prevent flames, heat, smoke, and harmful gases from leaking to the outside through the gap.

[0057] Accordingly, the control unit (150) controls the upward deployment operation of the variable water tank unit (110) and the downward operation of the second lifting module (122) in conjunction so that the shielding sheet (121) quickly covers the upper part of the electric vehicle immediately after the flooded space (A) is formed, thereby locally sealing and shielding the upper part of the electric vehicle to suppress the external spread of flames and harmful gases, and in conjunction with the lower flooding by the variable water tank unit (110), it is possible to more effectively block the spread of fire and its transfer to adjacent vehicles.

[0059] Meanwhile, a plurality of intake ports for sucking smoke and harmful gases inside the shielding space may be further formed at the edge of the upper frame or shielding sheet (121) of the variable shielding part (120), and the intake ports may be configured to be connected to an intake duct, a blower fan, a neutralization cartridge, or a wet scrubber, and the neutralization cartridge may include an alkaline absorbent capable of neutralizing hydrogen fluoride (HF) and acidic gases, and the wet scrubber may include a neutralization tank in which a neutralization liquid is stored and a circulation pump to clean the gas collected inside the shielding space.

[0060] Accordingly, the control unit (150) drives the blower fan after the variable shielding unit (120) is fully deployed or simultaneously with the water supply of the fire extinguishing water spraying unit (140) to maintain the inside of the shielding space in a weak negative pressure state, thereby going beyond simple shielding to actively suppress the leakage of harmful gases to the outside and reduce secondary damage to workers and adjacent vehicles.

[0062] Next, the fire detection unit (130), with reference to FIGS. 1, FIGS. 3 and FIGS. 4, measures the off-gas concentration and the surface temperature of the electric vehicle in the parking area where the electric vehicle is parked to detect signs of fire and the occurrence of fire, and transmits the detection result to the control unit (150).

[0063] Specifically, the fire detection unit (130) includes an off-gas detection sensor and a thermal imaging camera, and the control unit (150) analyzes the pattern of time-series data by gas component collected from the off-gas detection sensor and, when a venting stage, which is a precursor symptom of battery thermal runaway, is detected, controls the variable water tank unit (110) and the variable shielding unit (120) to seal the electric vehicle and perform isolation. Subsequently, when an abnormal temperature exceeding a preset temperature rise rate is confirmed through the thermal imaging camera, the fire extinguishing water spray unit (140) is controlled to supply fire extinguishing water to the flood space (A) so that the electric vehicle is flooded.

[0064] Here, the off-gas detection sensor can detect the concentration of at least one of hydrogen, carbon monoxide, hydrogen fluoride, and volatile organic compounds (VOC) generated during the pre-thermal runaway stage of the electric vehicle battery to generate time-series data for each gas component, and the control unit (150) can pattern analyze the concentration value, concentration change rate, and duration of each gas component included in the time-series data, and when a vent stage, which is a pre-thermal runaway symptom of the battery, is detected, it can first operate the variable water tank unit (110) and the variable shielding unit (120) to seal and isolate the parking area where the electric vehicle is located.

[0065] Additionally, the thermal imaging camera may be configured to measure the surface temperature in real time for a plurality of areas of interest, including the lower battery pack area of ​​the electric vehicle, the area around the wheelhouse, the area around the charging port, and the heat-vulnerable parts of the vehicle body, and the control unit (150) may determine whether there is abnormal heat generation by analyzing the temperature value, average temperature rise rate, maximum temperature value, and the amount of temperature change over time for each area of ​​interest.

[0066] Meanwhile, the control unit (150) cross-verifies the off-gas detection result and the thermal image analysis result, and if an abnormal temperature exceeding a preset temperature rise rate is additionally confirmed after off-gas detection, it can control the fire extinguishing water spray unit (140) to supply fire extinguishing water to the flooded space (A).

[0067] Accordingly, the fire detection unit (130) can continuously monitor the electric vehicle battery from the pre-heat runaway stage to the actual fire occurrence stage through a dual detection structure that combines off-gas-based early detection and thermal imaging-based abnormal heat detection, and can prevent the spread of flames, external leakage of harmful gases, and fire transmission to adjacent vehicles by linking the operation of the variable water tank unit (110), the variable shielding unit (120), and the fire extinguishing water spray unit (140).

[0069] Next, the fire extinguishing water spraying unit (140), with reference to FIGS. 1 and 2, is formed on the floor surface of the corresponding parking area and supplies fire extinguishing water to the flooded space (A) when the variable water tank unit (110) is expanded upward to flood the electric vehicle.

[0070] For example, the fire extinguishing water spraying unit (140) is configured to include a plurality of spray nozzles that are embedded in the floor surface of the parking area or formed at a height substantially equal to the floor surface, a supply channel for supplying fire extinguishing water to the spray nozzles, and an opening and closing means for controlling whether or not to supply fire extinguishing water and the amount of supply. When a fire sign or fire occurrence is detected by the fire detection unit (130) and the variable water tank unit (110) is deployed upward to form a flooded space (A), fire extinguishing water can be rapidly supplied into the flooded space (A) under the control of the control unit (150), and the lower part of the electric vehicle and the area around the battery pack can be submerged first.

[0071] Additionally, multiple spray nozzles may be spaced apart from each other along the floor surface of the parking area so that the fire extinguishing water is not concentrated in a specific location and is evenly filled throughout the flooded space (A). The control unit (150) may control the timing of operation of the fire extinguishing water spray unit (140) in conjunction with whether the variable water tank unit (110) has been fully deployed, thereby ensuring that the fire extinguishing water is stably stored inside the flooded space (A) before it leaks out. Furthermore, by controlling the supply amount or supply time of the fire extinguishing water in conjunction with a water level sensor that detects the water level of the flooded space (A), the water level may be maintained such that the lower part of the electric vehicle and the battery pack can be sufficiently cooled, while preventing excessive overflow.

[0072] Meanwhile, the fire extinguishing water supplied by the fire extinguishing water spray unit (140) may be a water-based fire extinguishing medium suitable for cooling and suppressing flooding of electric vehicle fires, for example, fresh water, tap water, water stored in a fire extinguishing reservoir, fire extinguishing water supplied from an indoor fire hydrant or sprinkler piping, or at least one of a water-based fire extinguishing agent mixed with a predetermined additive to improve cooling performance or suppress re-ignition.

[0073] Accordingly, the fire extinguishing water spraying unit (140) can rapidly create a suppression environment that locally immerses the electric vehicle by linking with the immersion space (A) formed by the variable water tank unit (110), and effectively absorb the high heat generated by the battery thermal runaway to more stably block the spread of flames and the transfer of fire to adjacent vehicles.

[0075] Alternatively, the fire extinguishing water spraying unit (140) may be divided into a plurality of water supply zones on the floor surface of the parking area, and each water supply zone may be configured to include a zone-specific valve that opens and closes independently of each other. The control unit (150) may estimate the lower area where the battery pack is located using the vehicle's parking position, wheelbase, vehicle type information, or vehicle location information collected from a position detection sensor and an image sensor provided on the floor surface, and by opening the water supply zone corresponding to the estimated lower area of ​​the battery pack first to concentrate the supply of fire extinguishing water, the fire extinguishing water may be supplied preferentially to the area around the electric vehicle's battery pack to increase cooling efficiency and improve thermal runaway suppression performance while reducing unnecessary water supply.

[0077] Alternatively, the fire extinguishing water spraying unit (140) may further include a fire extinguishing water circulation control unit (not shown) embedded in the floor surface of the parking area to prevent the fire extinguishing water stored inside the flooded space (A) from boiling due to the high heat of the battery and reducing cooling efficiency.

[0078] Specifically, the fire extinguishing water circulation control unit may be configured to include a drain that sucks in fire extinguishing water inside a flooded space (A), a water supply port that supplies cooled fire extinguishing water back to the flooded space (A), a circulation path connecting the drain and the water supply port, a circulation pump that forcibly circulates fire extinguishing water along the circulation path, and a heat exchanger disposed on the circulation path to remove heat from the recovered fire extinguishing water.

[0079] Here, the fire extinguishing water circulation control unit may further include a purification filter comprising an ion exchange resin, activated carbon, a metal adsorbent, or a composite filter in the circulation path, and after the fire suppression is finished, the contaminated fire extinguishing water inside the flooded space (A) may be passed through the purification filter to remove lithium salts, fluorides, and harmful heavy metal components, and then transferred to an external storage tank or discharge line, thereby purifying the contaminated water that may be generated during the fire suppression process and discharging it to prevent environmental pollution and minimize the spread of secondary contamination inside the parking facility.

[0081] Next, the control unit (150), referring to FIG. 1, generates a control signal according to the detection result of the fire detection unit (130) to control the upward expansion of the variable water tank unit (110), the shielding by the variable shielding unit (120), and the supply of fire extinguishing water to the fire extinguishing water spraying unit (140) in conjunction.

[0082] For example, when a fire sign or fire is detected, the control unit (150) identifies the state in which the electric vehicle is connected to the electric vehicle charger and controls the remote circuit breaker of the power distribution box supplying power to the electric vehicle charger to immediately cut off the charging power, transmits evacuation and relocation parking warning information to the terminals of the electric vehicle owner and adjacent electric vehicle owners in conjunction with the integrated management platform, and can spread the fire situation through the warning light and speaker above the parking area.

[0083] Accordingly, the control unit (150) can perform integrated cutting off of charging power, sealing and isolation of the parking area, supplying fire extinguishing water, propagating alarms, and linking with external control based on the detection result of the fire detection unit (130), thereby automating the response procedure from the initial warning stage of the electric vehicle fire to the actual suppression stage, and more effectively blocking the spread of flames, leakage of harmful gases, and transfer of fire to adjacent vehicles.

[0085] Accordingly, by configuring the fire suppression system for electric vehicle parking lots as described above, the speed of initial response can be increased by performing charging power cutoff, parking area sealing, isolation, and flood suppression by linking off-gas detection and thermal imaging detection during the pre-thermal runaway stage of the electric vehicle battery, and the variable water tank and variable shielding unit can operate in conjunction to intensively cool the underside of the electric vehicle and the battery pack, thereby blocking the external spread of flames, heat, and harmful gases and the transfer of fire to adjacent vehicles.

[0087] The embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application. Explanation of the symbols

[0089] 110 : Variable water tank unit 111 : Pop-up panel 112: 1st lifting module 120: Variable shielding part 121 : Shielding sheet 122 : Second lifting module 123 : Winder 124 : Drive Module 130: Fire detection unit 140: Fire extinguishing water spray unit 150 : Control unit

Claims

Claim 1 A variable water tank unit provided on the floor surface of a parking area where an electric vehicle enters and is parked, which normally maintains a flat floor state but expands upward according to a control signal upon detection of fire signs or fire occurrence to form a flood space capable of containing fire extinguishing water; a variable shielding unit including a shielding sheet made of basalt fiber material formed on the upper frame or ceiling of the variable water tank unit and covering the upper part of the variable water tank unit expanded upward according to the control signal to block the external spread of flames and harmful gases; a fire detection unit that detects fire signs and fire occurrence by measuring the off-gas concentration of the parking area where the electric vehicle is parked and the surface temperature of the electric vehicle; and a fire extinguishing water spraying unit formed on the floor surface of the parking area that supplies fire extinguishing water to the flood space to immerse the electric vehicle when the variable water tank unit expands upward. A fire suppression system for an electric vehicle parking lot, comprising: a control unit that generates a control signal according to the detection result of the fire detection unit and controls the upward deployment of the variable water tank unit, shielding by the variable shielding unit, and the supply of fire extinguishing water by the fire extinguishing water spraying unit in conjunction; wherein the variable shielding unit is installed on the upper frame of the variable water tank unit and normally remains in a wound state on one side of the upper frame, but upon detection of a fire sign or fire occurrence, deploys horizontally toward the other side of the upper frame according to the control signal to cover the upper part of the variable water tank unit and block the external spread of flames and harmful gases. Claim 2 A fire suppression system for an electric vehicle parking lot according to claim 1, wherein the variable water tank unit comprises a plurality of pop-up panels that are embedded along the perimeter of the corresponding parking area and rise to a certain height according to the control signal to form a closed water barrier, and a first lifting module that raises and lowers the pop-up panels. Claim 3 A fire suppression system for an electric vehicle parking lot according to claim 2, wherein the pop-up panel comprises a water barrier formed of a shielding sheet and a waterproof coating layer made of basalt fiber material, and a support frame that supports the shape of the water barrier and is raised by the first lifting module. Claim 4 A fire suppression system for an electric vehicle parking lot according to claim 1, wherein the variable shielding part comprises a shielding sheet made of basalt fiber material covering the upper part of the upwardly deployed variable water tank part, and a second lifting module formed on the ceiling to raise and lower the shielding sheet in opposition to the upper part of the variable water tank part. Claim 5 delete Claim 6 A fire suppression system for an electric vehicle parking lot according to claim 1, wherein the fire detection unit includes an off-gas detection sensor and a thermal imaging camera, and the control unit analyzes the pattern of time-series data by gas component collected from the off-gas detection sensor and, when a venting stage which is a precursor symptom of battery thermal runaway is detected, controls the variable water tank unit and the variable shielding unit to seal the electric vehicle to perform isolation, and subsequently, when an abnormal temperature exceeding a preset temperature rise rate is cross-confirmed through the thermal imaging camera, controls the fire extinguishing water spray unit to supply fire extinguishing water to the flooded space. Claim 7 A fire suppression system for an electric vehicle parking lot according to claim 1, wherein the control unit, upon detecting signs of fire or the occurrence of a fire, identifies the state in which an electric vehicle is connected to the electric vehicle charger, controls a remote circuit breaker of a power distribution box supplying power to the electric vehicle charger to immediately cut off the charging power, transmits evacuation and relocation parking warning information to the terminals of the electric vehicle owner and adjacent electric vehicle owners in conjunction with an integrated management platform, and propagates the fire occurrence situation through a warning light and speaker above the parking area.

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