FIRE REACTION DEVICE FOR ROOF-MOUNTED ELECTRIC VEHICLE BATTERIES

Abstract

A fire response device for roof-mounted electric vehicle batteries features a mounting frame that supports a battery pack surrounded by vertical supports. The vertical supports extend upwards to support a skeleton frame positioned above the battery pack. A water storage wall is attached to the skeleton frame, enclosing an area beneath it, while a water storage barrier connected to the bottom of the wall forms a floor surface. A control system is designed to release a fire-suppressing fluid into a water storage structure when a specific condition is detected, ensuring that the battery pack remains safely contained within a water storage reservoir for effective fire suppression.

Description

BACKGROUND (a) Technical field The present invention relates to a fire response device for roof-mounted electric vehicle batteries, in particular to the fire response device for roof-mounted electric vehicle batteries which enables each battery pack to be immersed in a fire-extinguishing liquid in an emergency, even if a battery pack system is attached to the upper part of the vehicle body, such as in an electric bus. (b) Description of the state of the art Electric vehicles are increasingly replacing conventional combustion engines in a wide variety of applications. The capacity of battery systems is still technically limited, and there are also limitations on the voltage level that can be used by the battery systems. Nevertheless, electric vehicles are environmentally friendly and have a high energy efficiency compared to combustion engines, and various political measures and support are aimed at them worldwide. Electric vehicles are now bringing about changes in the automotive industry and are not limited to small electric drive devices, but are also being used in large, energy-intensive appliances. Lithium-ion batteries, widely used in electric vehicles, are efficient due to their high energy density. However, they also have the disadvantage of being susceptible to high temperatures and impacts. In rare cases, a battery system installed in an electric vehicle can overheat. In such cases, immersing the battery system in a fire-extinguishing liquid is known to be an effective measure to prevent secondary accidents caused by an overheating battery. However, in cases where a battery pack system is not placed in the lower section of a vehicle but is installed on the roof of the vehicle, such as in electric buses, there is a structural limitation that makes it difficult to quickly immerse a battery pack in a fire-extinguishing liquid in case of overheating. Therefore, technologies are needed that solve these problems. PRESENTATION OF THE INVENTION Therefore, the present disclosure addresses a problem in which a dedicated water reservoir had to be installed separately to extinguish a fire that may occur secondarily due to overheating of the batteries of an electric vehicle, and this caused an increase in the overall load and a narrower vehicle body. The present disclosure also addresses a problem in which it was insufficient to detect and respond to heat generation from some batteries in a specific situation where batteries are installed on the upper section of a vehicle, such as an electric vehicle. The present disclosure further addresses a problem in which it was difficult to additionally install a fire prevention structure capable of storing a fire-extinguishing liquid around the batteries of an electric bus, because a battery pack system must be designed in a structure that is advantageous for cooling and capable of easily discharging dust and foreign substances when the electric bus is driven. The objectives of this disclosure are not limited to those described above, and other objectives or tasks not mentioned herein are evident from the following description. According to the present disclosure, the above and other objectives can be achieved by providing a fire response device for roof-mounted electric vehicle batteries, comprising an electric vehicle battery pack, a mounting frame configured to accommodate the battery pack, a plurality of vertical supports configured to extend upwards from the mounting frame along an outer circumference of the battery pack, a skeleton frame coupled to the upper ends of the plurality of vertical supports and positioned higher than the battery pack while surrounding a wider area than the battery pack, a water storage wall formed of a waterproof material and configured to have an upper end that is attached along the skeleton frame and to surround an area below the skeleton frame in all directions, and a water storage barrier.which is formed from a waterproof material and is designed to have an outer perimeter connected to a lower end of the water storage wall to form a bottom surface, and a control designed to supply a fire-extinguishing liquid to the water storage structure formed by the water storage wall and the water storage barrier when a predetermined condition is detected, wherein the battery pack is arranged inside the water storage structure. According to one aspect of the present disclosure, a fire response device for roof-mounted electric vehicle batteries comprises: an electric vehicle battery pack; a mounting frame configured to receive and support the battery pack, such that the battery pack is electrically connected to the mounting frame; a plurality of vertical supports extending upwards from the mounting frame along an outer circumference of the battery pack; a skeleton frame coupled to the plurality of vertical supports; a water storage wall attached to the skeleton frame and configured to surround an area below the skeleton frame; and a control configured to supply fire-extinguishing fluid to the water storage structure upon detection of a predetermined condition, the battery pack being arranged within the water storage structure. The fire response device may further include a water storage barrier formed from a waterproof material, wherein the water storage barrier has an outer perimeter connected to a lower end of the water storage wall to form a bottom surface of the water storage structure. The water storage barrier can have a coupling surface designed to have a predetermined area and connected to a lower end of the mounting frame via a plurality of coupling modules to form a flat surface, and the plurality of coupling modules designed to connect the coupling surface to the lower end of the mounting frame can extend vertically downwards and be coupled to a roof of a body of the electric vehicle. The mounting frame can be stacked on top of another mounting frame by coupling the coupling modules, which are designed to extend downwards from the coupling surface to the upper ends of a plurality of vertical supports connected to the other mounting frame. The water storage wall may have at least one open port formed in a lateral surface of the water storage wall to be open to a predetermined area, and a water shield provided at an inner upper end of the open port and designed to close the open port when the ambient temperature exceeds a predetermined value. The water shield may include a wall connector provided with an area wider than the width of the open connection and coupled to a position higher than where the open connection is formed along an inner surface of the water storage wall; an attracting adhesive part provided along a lower end of the open connection on an outer surface of the water storage wall; a corresponding adhesive part provided in a horizontal direction at a lower end of the water shield to form an attractive force with the attracting adhesive part; and a melting element designed to roll the water shield upwards within the water storage wall and break at a predetermined temperature to trigger the water shield. The water screen may further include a pair of band springs arranged in a vertical direction at both lateral ends of the water screen and elastically reset to trigger the water screen when an external force is removed. The skeleton frame can have a support frame, designed as a rectangular frame above an upper section of the battery pack, and a mounting bracket, designed as a flat surface along an outer circumference of the support frame and provided with a plurality of mounting holes formed at predetermined intervals; the water storage wall can have a plurality of coupling holes formed at an upper mounting end along an upper end of the water storage wall at intervals corresponding to the mounting holes, and the coupling holes and the mounting holes can be coupled to each other by means of fastening elements. The water storage wall may further have a lower forming end which is formed with a certain width along its lower end of the water storage wall, the water storage barrier may have a forming boundary which is formed with a predetermined width along an outer circumference of the water storage barrier, and the fire response device may further have a forming frame which is coupled to the lower forming end in a horizontal direction and to the forming boundary in a vertical direction. The mold frame can be designed as a rectangular frame corresponding to the support frame and having a vertical coupler having an upwardly open longitudinal opening and being designed in a longitudinal direction such that at least a section of the lower mold end is inserted therein to be coupled with the vertical coupler, and a horizontal coupler having an inwardly open longitudinal opening and being designed in the longitudinal direction such that at least a section of the mold boundary is inserted therein to be coupled with the horizontal coupler. The mold frame may further comprise a plurality of horizontal rivets designed to protrude through the lower mold end, which is inserted into the vertical coupler to couple the lower mold end to the vertical coupler, and a plurality of vertical rivets designed to protrude through the mold boundary, which is inserted into the horizontal coupler to couple the mold boundary to the horizontal coupler. The mold frame can further include a high-strength mold holder that has a high modulus of elasticity to be less deformed by external force, and is designed to connect the vertical coupler and the horizontal coupler to be perpendicular to each other in the mold frame formed in a limit shape. The water storage barrier can further have a corresponding deformation surface, which is provided as a surface formed between an outer circumference of the coupling surface and an outer circumference of the water storage barrier, which is connected to the lower end of the water storage wall, and which is designed such that at least a subsection of the corresponding deformation surface between the coupling surface and the outer circumference of the water storage barrier is formed as a curved surface. The corresponding deformation surface can have a drainage port adjacent to the outer circumference of the coupling surface and open to a predetermined size, and a shield coupled to an upper side of the corresponding deformation surface along one side and configured to face the coupling surface along the outer circumference of the drainage port in order to close the drainage port in a predetermined situation. According to another aspect of the present disclosure, a vehicle may have the fire response device. According to another aspect of the present disclosure, a fire response device for roof-mounted electric vehicle batteries comprises: an electric vehicle battery pack; a mounting frame configured to receive and support the battery pack, such that the battery pack is electrically connected to the mounting frame; a plurality of vertical supports extending upward from the mounting frame along an outer circumference of the battery pack; a skeleton frame coupled to the plurality of vertical supports, the skeleton frame being positioned above the battery pack and surrounding an area wider than the battery pack; a water storage wall formed of a waterproof material, having an upper end attached to the skeleton frame and configured to surround an area below the skeleton frame in all directions;and a control system designed to supply fire-extinguishing fluid to the water storage structure upon detection of a predetermined condition, wherein the battery pack is arranged within the water storage structure. The fire response device may further include a water storage barrier formed from a waterproof material, wherein the water storage barrier has an outer perimeter connected to a lower end of the water storage wall to form a bottom surface of a water storage structure. SHORT FIGURE DESCRIPTION The above and other objectives, features, and other advantages of the present disclosure are clarified by the following detailed description in conjunction with the accompanying figures, in which: Fig. 1 and Fig. 2 are perspective and front views, respectively, schematically representing a fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure; Fig. 3 and Fig. 4 are perspective views representing a state in which a battery pack is coupled to a mounting frame for attachment to a roof in the fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure; Fig. 5, Fig. 6 to Fig. 7 are perspective views.Figure 7 shows a process of installing the battery pack in a space surrounded by a water storage barrier and a water storage wall in the fire response device for roof-mounted electric vehicle batteries according to one embodiment of the present disclosure; Figure 8 is a cross-sectional view showing the internal structure of the fire response device for roof-mounted electric vehicle batteries according to one embodiment of the present disclosure; Figure 9 is an enlarged partial view showing section A of Figure 8; Figure 10 is an enlarged partial view showing section B of Figure 8; Figure 11 is an enlarged partial view showing section C of Figure 8; FigureFigure 12 is a partial cross-sectional view showing the structure of a shield installed at a drainage port in a fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure; Figure 13 is a partial cross-sectional view showing the structure of a water shield installed at an open port in the fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure; and Figure 14 is a schematic view showing a principle for forming a water storage space such that a fire-extinguishing liquid is stored therein in a roof-mounted electric vehicle battery according to an embodiment of the present disclosure. DETAILED DESCRIPTION It should be noted that the term "vehicle" or "vehicle-like" or similar terms used herein include motor vehicles in general, such as passenger cars, including sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft such as various boats and ships, aircraft, and the like, and include hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and vehicles with alternative propulsion systems (e.g., fuels derived from resources other than petroleum). Where reference is made herein, a hybrid vehicle is a vehicle that has two or more power sources, for example, both gasoline-powered and electric-powered vehicles. The terminology used herein serves only to describe certain embodiments and is not intended to limit the present disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be noted that the terms "have" and / or "having" when used in this specification indicate the presence of the aforementioned features, integers, steps, operations, elements, and / or groups thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the listed elements in question.Throughout the specification, unless explicitly stated otherwise, the word "include" and variations such as "indicates" or "indicating" are to be understood as implying the inclusion of the mentioned elements but not the exclusion of other elements. Additionally, the terms "unit," "-er," "-or," and "module," as described in the specification, denote units for processing at least one function and operation and can be implemented by hardware components or software components and combinations thereof. Furthermore, the control logic of the present disclosure can be embodied as non-transferable, computer-readable media on a computer-readable medium containing executable program instructions that are executed by a processor, controller, or the like. Examples of computer-readable media include, but are not limited to, ROM, RAM, compact disks (CD-ROMs), magnetic tapes, floppy disks, flash memory, smart cards, and optical data storage devices. The computer-readable medium can also be distributed in network-connected computer systems, such that the computer-readable media is stored and executed in a distributed manner, e.g., by a telematics server or a controller area network (CAN). The exemplary embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings. Where possible, the same reference symbols are used in the drawings to denote the same or similar components, and any redundant description of them is omitted. When an element or layer is described as "connected to" or "coupled with" another element or layer, it may be directly connected or coupled to the other element or layer, or intermediate elements or layers may be present. Instead, if an element is described as "directly connected to" or "directly coupled to" another element or layer, there need not be any intermediate elements or layers. Additionally, a first direction (X-axis direction), a second direction (Y-axis direction) and a third direction (Z-axis direction), which are mentioned in the following description, are used to describe a three-dimensional shape in a three-dimensional space and indicate directions that are orthogonal to each other. The present disclosure relates to a fire response device for roof-mounted electric vehicle batteries. Because in most cases a battery pack system is mounted on a roof 100 of the body of an electric bus 1, and a method of quickly suppressing heat generation or fires in the battery pack system mounted on the roof 100 of the electric bus 1 is required, the present disclosure proposes a technical feature that quickly stabilizes the battery pack system in such an environment. Fig. 1 and Fig. 2 are a perspective and a front view, which schematically represent a fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure. As shown in Fig. 1 and Fig. 2, the electric bus 1 generally has a wide body in which both long side surfaces 20 extend longitudinally between a front surface 10 and a rear surface 30, and has a high overall height because the roof 100 of the electric bus 1 is provided in a high position. The electric bus 1 can generally have various hardware, such as the battery pack system, an air conditioning system and a communication system, installed in a usable space 150, which is formed on the roof 100. The drawings briefly illustrate that packing components 120 are provided in the usable space 150 between a base panel 110, which is designed to form the floor surface of the roof 100, side panels, which are designed to form the side walls of the roof 100, and an upper cover 140, which is designed to form the ceiling surface of the roof 100. As shown, depending on an embodiment to which the present disclosure is applied, battery packs 200 can be stacked in at least two layers while secured in the pack loading part 120 and can be stably installed at a certain position in the space of the roof 100 of the electric bus 1. The fire response device according to an embodiment of the present disclosure can comprise the battery pack 200, a mounting frame 300, a plurality of vertical supports 310, a skeleton frame 400, a water storage wall 600, a water storage barrier 500 and a control unit. The battery pack 200 is formed by accommodating a plurality of battery modules within a housing of a predetermined size. Each battery module is formed by stacking and combining a plurality of battery modules in multiple layers. The mounting frame 300 can be designed as a linear frame that forms a space in which the battery pack 200 can be placed and surrounds and protects at least a section of the outer perimeter of the battery pack 200. Each battery pack 200 can have a terminal forming part that is formed on its outer surface to transmit and receive an electrical signal and / or data signal. Additionally, cooling plates can be installed on the upper and lower surfaces of the battery pack 200 for cooling, and a pair of installation terminals 210 extending parallel to the outside can be provided on both side walls of the battery pack 200. A number of mounting units can be formed at the installation connections 210 in order to be connected to an external structure. In one embodiment of the present disclosure, the mounting frame 300 can be configured as a rectangular frame or a plate-shaped element to conform to the outer shape of each battery pack 200. The installation terminals 210, which project longitudinally from both lateral ends of the battery pack 200, are each coupled to the mounting frame 300 to be supported by both sides of the mounting frame 300. The mounting frame 300 can have a plurality of vertical supports 310 arranged along the outer circumference of the battery pack 200. The lower ends of the vertical supports 310 are connected to the upper surface of the mounting frame 300, and the vertical supports 310 extend vertically upwards by a specified length. A horizontally formed plane can be provided at the upper end of each of the vertical supports 310, and a connection structure, provided in various forms, such as a screw coupling hole and an insert coupling hole, can be provided in the plane of the upper end of the vertical support 310, depending on the embodiment to which this disclosure is applied. The mounting frame 300 attaches each battery pack 200 to the roof 100 of the electric bus 1, while stably fixing the battery pack 200. Mounting frames 300 can be installed in a stacked structure with at least two layers by means of the vertical supports 310, while the battery pack 200 is firmly attached to each mounting frame 300. Figures 3 and 4 are perspective views showing a state in which a battery pack 200 is coupled to a mounting frame 300 in order to be attachable to a roof 100 in the fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure. As shown in Figs. 3 and 4, each battery pack 200 can be rigidly attached to the mounting frame 300. The mounting frame can be configured to surround the outer circumference of the lower end of each battery pack 200. Alternatively, as described above, the mounting frame 300 can be formed in a plate shape along the lower section of the battery pack 200, a rigid structure can be provided along the outer edge of the plate-shaped surface of the mounting frame 300, and a plurality of openings can be formed in the plate-shaped surface of the mounting frame 300. The majority of vertical supports 310 extend from the outer end of the mounting frame 300 along the outer circumference of the battery pack 200, and the upper ends of the vertical supports extend to a position that is higher than the thickness of each battery pack 200. The mounting frame 300 can be made of a high-strength metallic material, such as an aluminum alloy or other metal. The mounting frame 300 can also be designed with a material that offers advantages in terms of weight reduction and high corrosion resistance. Figs. 5, 6 to 7 are views depicting a process of installing the battery pack 200 in a space surrounded by the water storage barrier 500 and the water storage wall 600 in the fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure. As shown in Figs. 5, 6 to 7, a skeleton frame 400 is provided above the upper section of the mounting frame 300. The skeleton frame 400 can have a support frame 410 and a mounting bracket 420. The skeleton frame 400 can be coupled to the upper ends of the majority of vertical supports 310. The skeleton frame 400 is designed to enclose an area wider than the battery pack 200 and is positioned horizontally at a higher position than the battery pack 200. Each battery pack 200 is a structure designed such that the upper section of it is protected by the skeleton frame 400 and the lower section of it is supported by the mounting frame 300, and can be stably attached in the pack loading part 120, which is designed to be stably attached to the roof 100. The support frame 410 of the skeleton frame 400 is designed as a rectangular or square frame around the upper circumference of the battery pack 200 and is designed to have a wider area than the entire outline of each battery pack 200. The mounting bracket 420 is a plane formed in a lateral direction to have a constant vertical width along the outer circumference of the support frame 410, and an upper mounting end 610 provided at the upper end of the water storage wall 600 is coupled to the plane of the mounting bracket 420. The skeleton frame 400 may further include a reinforcing element 430, and the reinforcing element 430 may be designed to cross the support frame 410 or to connect some curved corners of the support frame 410, thereby increasing the structural strength of the skeleton frame 400. Additionally, each reinforcement frame and / or the support frame 410 can be equipped with several upward-extending expansion modules 440. The expansion modules 440 can be used to stack the packing load part 120, to be coupled to an external structure, to install an additional device, etc. The water storage wall 600 can have the upper fastening end 610, which is designed to have a predetermined width along its upper end. The upper mounting end 610 of the water storage wall 600 is attached to the mounting bracket 420 of the skeleton frame 400 so that it is in surface contact with it. The surface of the mounting bracket 420 and the surface of the upper mounting end 610 can be bonded together using an adhesive film or glue. Alternatively, a plurality of fastening holes can be formed at predetermined intervals in the fastening holder 420, which is a belt-shaped surface formed along the outer circumference of the support frame 410, and correspondingly, a plurality of coupling holes can be formed at predetermined intervals in the longitudinal direction in the upper fastening end 610. As shown in Fig. 6, the mounting bracket 420 and the upper mounting end 610 can face each other and be firmly coupled by means of fastening elements 620. The 600 mm water storage wall can be made of a waterproof fabric. Additionally, the 600 mm water storage wall can be made of a material that offers high thermal insulation and high waterproof performance, and is robust enough not to be easily torn or punctured. Since the upper fastening end 610, which is formed long along the upper end of the water storage wall 600, is coupled to the outer circumference of the skeleton frame 400, the water storage wall 600 is arranged below the skeleton frame 400 in a shape that surrounds a space corresponding to the shape of the skeleton frame 400. At least one open connection 640 can be designed to have a constant length in the vertical direction from the upper mounting end 610 of the water storage wall 600. The open connection 640 is an open space formed in the water storage wall 600 to have a predetermined size and can be designed to allow devices, such as data cables and cooling channels, to pass through it, to ventilate the space in which the battery pack is installed, and to remove foreign substances from the space. The water storage wall 600 is provided with a lower forming end 630, which is formed long along its lower end. The lower forming end 630 forms a section that has a certain width along the lower end of the water storage wall 600. A thin, film-like steel material can be inserted into the lower mold end 630 to further increase the strength of the lower mold end. The water storage barrier 500 has a mold boundary 540 formed along its outer circumference. The mold boundary 540 is continuous to have a predetermined width, such as the lower mold end 630, and may be designed such that a film-like steel material is inserted into the mold boundary 540. The water storage barrier 500 is connected to the lower mold end 630, which is formed along the lower end of the water storage wall 600 by a mold frame 700. This allows the water storage barrier 500 to be formed as a predetermined floor surface with an outer perimeter connected to the lower end of the water storage wall 600. The water storage barrier 500 can also be made of a waterproof fabric, and the fabric can be selected to have high thermal performance and durability. The controller collects predetermined data, including the status of the battery pack 200. Then, when a predetermined situation occurs based on the collected data, as described above, the controller supplies a fire-extinguishing liquid to the water storage structure formed by the water storage wall 600 and the water storage barrier 500, while the battery pack 200 is attached within it. The fire-extinguishing liquid is supplied up to a height at which the battery pack 200 can be completely submerged. The water storage barrier 500 is made of a waterproof and thermally insulating material that is arranged broadly in the horizontal direction. The water storage barrier 500 has a coupling surface 510, which has a middle section and is formed around the middle section, and a corresponding deformation surface 530, which is an area between the outer circumference of the coupling surface 510 and the form boundary 540. A plurality of fixing holes 520 are formed in the coupling surface 510 and each fixing hole 520 can be coupled to a corresponding lower mounting holes formed in the mounting frame 300 by an extension coupling module 800. This means that the majority of fixing holes 520 are formed in the coupling surface 510 and each fixing hole 520 can be coupled to the lower mounting hole formed at the corresponding position of the mounting frame 300 by the extension coupling module 800. Accordingly, the coupling surface 510 is designed as a flat plane at a height where the lower mounting holes are formed in the mounting frame 300 provided above it. The corresponding deformation surface 530 can be designed as a predetermined surface curved downwards by gravity from the coupling surface 510 to the form boundary 540. Additionally, the corresponding deformation surface 530 can be provided with at least one drainage connection 550. The drainage connection 550 is an opening of a predetermined size formed in the corresponding deformation surface 530, and in one embodiment of the present disclosure, the drainage connection 550 can be rectangular. Fig. 8 is a cross-sectional view showing the internal structure of the fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure, Fig. 9 is an enlarged partial view showing section A of Fig. 8, Fig. 10 is an enlarged partial view showing section B of Fig. 8, and Fig. 11 is an enlarged partial view showing section C of Fig. 8. As shown in Fig. 8, Fig. 9, Fig. 10 to Fig. 11, the extension coupling module 800 projects through the lower mounting hole formed in the lower end of the mounting frame 300 and the fixing hole 520 formed in the coupling surface 510 to couple the mounting frame 300 and the coupling surface 510. The extension coupling module 800 has adhesive surfaces 810, a spacer 820, and fixing units 830. The extension coupling module 800 can be configured such that a plurality of adhesive surfaces 810 and a plurality of fixing units 830 can be provided along the spacer 810, which is formed in a straight line, and the distance between objects to be coupled can be adjusted depending on the length of each spacer 820. This allows each mounting frame 300 to be coupled with other packing load parts 120 in a stacked structure in the vertical direction. The formwork frame 700 is made of a material with a high modulus of elasticity and high strength, so its external shape cannot be easily deformed. The formwork boundary 540 can be designed as a frame structure with a shape corresponding to the skeleton frame 400. The form frame 700 can be designed as a frame structure having a shape corresponding to the lower end of the water storage wall 600, which extends downwards from the skeleton frame 400, i.e. the lower end 630. The form frame 700 has a vertical coupler 720 with a thin opening that opens upwards and a horizontal coupler 710 with a thin opening that opens inwards. The vertical coupler 720 and the horizontal coupler 710 can be held at a specific angle by a high-strength form holder 730. The lower forming end 630 of the water storage wall 600 is inserted into the opening of the vertical coupler in order to be coupled to it. The form boundary 540 of the water storage barrier 500 is inserted into the opening of the horizontal coupler 710 in order to be coupled to it. This means that the battery pack 200, which is attached to the mounting frame 300, is arranged in a predetermined water storage structure formed around the circumference and base of the battery pack 200. Each of the vertical coupler 720 and the horizontal coupler 710 can be provided with a plurality of horizontal rivets or vertical rivets which protrude through and are inserted into the lower mold end 630 or the mold boundary 540 in order to be coupled to the lower mold end 630 and the mold boundary 540. Fig. 12 is a partial cross-sectional view showing the structure of a shield 560 installed at a drainage port 550 in a fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure; Fig. 13 is a partial cross-sectional view showing the structure of a water shield 650 installed at an open port 640 in the fire response device for roof-mounted electric vehicle batteries according to an embodiment of the present disclosure; and Fig. 14 is a schematic view illustrating a principle for forming a water storage space such that a fire-extinguishing liquid is stored therein in a roof-mounted electric vehicle battery according to an embodiment of the present disclosure. As described above, each battery pack 200 can be configured to be attached to the roof 100 of the electric bus 1, and the pack loading part 120, to which each battery pack 200 is attached, can form a predetermined water storage structure. The water storage structure is designed to allow for uniform ventilation and drainage through the drainage connection 550 and the open connection 640, without being sealed from the outside. Additionally, a space can be provided that is able to be structurally connected and coupled to the outside. The fire response device according to an embodiment of the present disclosure is operated such that the water storage structure, which is able to store the fire-extinguishing liquid at a predetermined temperature or higher, is formed in each battery pack 200. That is, as shown in Fig. 13, the water shield 650 can be provided at the open connection 640 formed in the water storage wall 600. The water shield 650 is made of a waterproof and thermally insulating material and is designed to have a larger area than the open connection 640. The water shield 650 is coupled to the inner surface of the water storage wall 600 along the upper section of the water storage wall 600 adjacent to the open connection 640 by a wall connector 652. The wall connector 652 can be implemented in various ways, such as seam processing and gluing. Under normal circumstances, the water shield 650 is rolled inwards towards the wall connector 652 to keep the open connection 640 in the open state. The water shield 650 is attached such that the open port 640 is held in the open state by a fusion element 660, which ruptures at a predetermined temperature. If the ambient temperature is higher than or equal to the predetermined temperature, the binding force of the fusion element 660 is therefore released, and the water shield 650 unrolls to close the open port 640 from the inside. A pair of band springs, positioned vertically at both lateral ends of the water shield 650, may be provided. These band springs allow the water shield 650 to expand rapidly when the binding force to the water shield 650 is removed. Additionally, an attracting adhesive element 642 can be quickly installed on the outer surface of the water storage wall 600 along the lower end of the open connection 640. Additionally, a corresponding adhesive element 654, which forms an attractive force with the attracting adhesive element 642, can be provided at the lower end of the water shield 650 at a height corresponding to that of the attracting adhesive element 642. Additionally, at least one drainage connection 550 can be formed in the water storage barrier 500. The drainage connection 550 is an open space of a predetermined size. The drainage connection 550 can be provided at an inclined position of the corresponding deformation surface 530 of the water storage barrier 500. The shield 560 is coupled to the inner surface of the water storage barrier 500 at a position adjacent to a relatively high end of the drainage connection 560 along a shield connector 562. The shield 560 can be made of a waterproof and thermally insulating material, and spring clips can be coupled to both ends of the shield 560 along its length. The shield 560 is secured in a rolled-up state towards the shield connector 562 within the drainage port 550 by a fusion element 570, which ruptures at a predetermined temperature. When the ambient temperature is heated to a predetermined temperature, the fusion element 570 ruptures, the binding force to the shield 560 is released, and the shield 560 unrolls to close the space in which the drainage port 550 is formed. An attraction-forming part 552 can be provided at an outer end of the drainage port 550 in a relatively low position, and an attraction-exerting part 564 can be provided at the lower end of the shield 560 in a position corresponding to the attraction-forming part 552 formed at the drainage port 550. Because the attraction-exerting part 564 is attached to the inner surface of the corresponding deformation surface 510, which couples the coupling surface 510 at the position corresponding to the attraction-exerting part 552, it is possible to form a robust water storage structure that does not dissipate the fire-extinguishing fluid due to water pressure that can be generated when the fire-extinguishing fluid fills the interior of the water storage structure. As can be seen from the above description, according to the present disclosure, a fire response device can be manufactured in a relatively lightweight and simple structure, even if a battery pack system is provided at the upper end of a vehicle, such as an electric bus. According to the present disclosure, when heat generation of a battery pack is detected, even though the battery pack system has a structure that simplifies air circulation and dust removal, the fire response device can quickly react to this situation and stabilize the battery pack system. According to the present disclosure, the fire response device can quickly detect heat generation from the battery pack system and respond quickly to this situation, thereby enabling it to prevent safety incidents that may occur due to the battery pack. According to the present disclosure, the fire response device performs a method of immersing the battery pack in the fire-extinguishing liquid, which is the most effective countermeasure in the event of battery overheating or battery fire, thereby enabling it to eliminate limitations of response methods depending on the battery situation itself in an electrical battery-mounted system, such as an electric bus. The effects of this disclosure are not limited to those mentioned above, and other effects not mentioned herein are clearly apparent to experts from the description above. The embodiments of the present disclosure have been described above. It is evident that the described embodiments and drawings are only illustrative and can be modified in various ways within the technical scope of the present disclosure. The described embodiments should be understood as part of the present disclosure and the scope of the present disclosure is not limited to these embodiments. The scope of the present disclosure should be determined depending on the technical idea described in the claims. Additionally, it should be understood that even if actions or effects according to a specific configuration are not explicitly described in the described embodiments, actions or effects that may be provided by the corresponding configurations are within the scope of this disclosure.

Claims

Fire response device for roof-mounted electric vehicle batteries, comprising: an electric vehicle battery pack 200; a mounting frame 300 configured to receive and support the battery pack 200, such that the battery pack 200 is electrically connected to the mounting frame 300; a plurality of vertical supports 310 extending upwards from the mounting frame 300 along an outer circumference of the battery pack 200; a skeleton frame 400 coupled to the plurality of vertical supports 310; a water storage wall 600 attached to the skeleton frame 400 and configured to surround an area below the skeleton frame 400; a water storage barrier 500 made of a waterproof material and having an outer circumference connected to a lower end of the water storage wall 600 to form a bottom surface of the water storage structure;and a control system designed to supply fire-extinguishing liquid to the water storage structure upon detection of a predetermined condition, wherein the battery pack 200 is arranged within the water storage structure. Fire response device according to claim 1, wherein the skeleton frame 400 is positioned above the battery pack and is designed to surround an area wider than the battery pack 200. Fire response device according to claim 1, wherein the water storage barrier 500 has a coupling surface 510 having a predetermined area, wherein the coupling surface 510 is connected to a lower end of the mounting frame 300 via a plurality of coupling modules 800 to form a substantially flat surface, and wherein the plurality of coupling modules 800 extend vertically downwards and are coupled to a roof 100 of a body of the electric vehicle. Fire response device according to claim 3, wherein the mounting frame 300 is stacked on another mounting frame 300 by coupling the coupling modules 800 which extend downwards from the coupling surface 510 to upper ends of a plurality of vertical supports 310 of the other mounting frame 300. Fire response device according to claim 1, wherein the water storage wall 600 comprises: at least one open port 640 formed in a side surface of the water storage wall 600 and having a predetermined area; and a water shield 650 provided at an inner upper end of the open port 640 and configured to close the open port 640 when the ambient temperature exceeds a predetermined value. Fire response device according to claim 5, wherein the water shield 650 comprises: a wall connector 652 having a region wider than the width of the open connection 640, and coupled to a position on an inner surface of the water storage wall 600 that is higher than the open connection 640; an attracting adhesive part 642 provided along a lower end of the open connection 640 on an outer surface of the water storage wall 600; a corresponding adhesive part 654 provided in a horizontal direction at a lower end of the water shield 650, wherein the corresponding adhesive part 654 is configured to form an attractive force with the attracting adhesive part 642;and a melting element 660, which is designed to roll the water shield 650 upwards within the water storage wall 600 and to break at a predetermined temperature in order to trigger the water shield 650.; Fire response device according to claim 6, wherein the water shield 650 further comprises a pair of band springs arranged at vertically opposite lateral ends of the water shield 650 and configured to elastically return the water shield 650 to its triggered state when an external force is removed. Fire response device according to claim 1, wherein the skeleton frame 400 comprises: a support frame 410, which is designed as a rectangular frame positioned above an upper section of the battery pack 200; and a mounting bracket 410, which is designed as a flat surface along an outer circumference of the support frame 410 and is provided with a plurality of mounting holes formed at predetermined intervals, wherein the water storage wall 600 has a plurality of coupling holes formed at an upper mounting end 610 that coincides with the mounting holes, and the coupling holes are coupled to the mounting holes via fastening elements. Fire reaction device according to claim 8, wherein the water storage wall 600 further comprises a lower forming end 630 which is formed with a certain width along its lower end. Fire response device according to claim 9, further comprising: a water storage barrier 500 having an outer circumference connected to a lower end of the water storage wall 600 to form a bottom surface of a water storage structure; the water storage barrier 500 further comprising a mold boundary 540 having a predetermined width along an outer circumference thereof; and the device further comprising a mold frame 700 which is horizontally coupled to the lower mold end 630 and vertically coupled to the mold boundary 540. Fire reaction device according to claim 9, wherein the mold frame 700 is designed as a rectangular frame corresponding to the support frame 410 and comprising: a vertical coupler 720 having an upwardly open longitudinal opening into which at least one section of the lower mold end 630 is inserted and coupled; and a horizontal coupler 710 having an inwardly open longitudinal opening into which at least one section of the mold boundary 540 is inserted and coupled. Fire reaction device according to claim 11, wherein the mold frame 700 further comprises: a plurality of horizontal rivets configured to project through the lower mold end 630, which is inserted into the vertical coupler 720 to ensure coupling thereto; and a plurality of vertical rivets configured to project through the mold boundary 540, which is inserted into the vertical coupler 710 to ensure coupling thereto. Fire reaction device according to claim 11, wherein the mold frame 700 further comprises a high-strength mold holder 730 having a high modulus of elasticity, wherein the high-strength mold holder 730 is configured to connect the vertical coupler 720 and the horizontal coupler 710 in a perpendicular manner within the mold frame 700. Fire response device according to claim 1, further comprising: a water storage barrier 500 having an outer circumference connected to a lower end of the water storage wall 600 to form a bottom surface of a water storage structure, wherein the water storage barrier 500 further comprising a corresponding deformation surface 530 provided between an outer circumference of the coupling surface 510 and an outer circumference of the water storage barrier 500 connected to the lower end of the water storage wall 600, wherein the corresponding deformation surface 530 has at least a partial section formed as a curved surface. Fire reaction device according to claim 14, wherein the corresponding deformation surface 530 comprises: a drainage port 550 formed adjacent to the outer circumference of the coupling surface 510 and having a predetermined size; and a shield 560 coupled to an upper side of the corresponding deformation surface 530 along a side facing the coupling surface 510, wherein the shield 560 is configured to close the drainage port 550 in a predetermined position.

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