Immersed fire extinguishing device suitable for new energy automobile fire

Abstract

The immersed fire extinguishing device comprises a jacking air bag, a water isolation bottom cushion and a flexible cofferdam, the jacking air bag can jack up a vehicle during inflation to form an off-ground space, and after the water isolation bottom cushion and the flexible cofferdam are inflated and unfolded in sequence, the water isolation bottom cushion and the flexible cofferdam are inflated and unfolded in sequence to form an off-ground space. By means of the structure of the jacking air bag and the water storage tank, when the vehicle catches fire, the fire extinguishing device in the folded state can be rapidly pushed into the position below a chassis of the vehicle, and the fire extinguishing effect is achieved. Then inflation is controlled to achieve the sequential implementation of the vehicle jacking process, the waterproof bottom cushion unfolding process and the flexible cofferdam unfolding process, a sealed water storage structure is formed, fire fighting liquid can be conveniently and rapidly injected, immersion of a vehicle chassis battery pack is achieved, and the functions of extinguishing fire, cooling, preventing fire spreading and restraining reburning of the battery pack are achieved; the device has the advantages of simple structure, convenience in use, reliability in sealing, high adaptability and high fire extinguishing efficiency.

Description

Technical Field

[0001] This invention relates to the field of fire protection technology for new energy vehicles, specifically to a submersible fire extinguishing device suitable for fires involving new energy vehicles. Background Technology

[0002] With the rapid popularization of new energy vehicles, the number of vehicles that use power batteries as the main energy source, such as electric vehicles, plug-in hybrid electric vehicles, and range-extended hybrid electric vehicles, continues to grow. Among them, high-energy-density batteries, represented by lithium-ion batteries, are widely used in power systems. However, lithium-ion batteries are prone to thermal runaway under conditions such as collision, external force compression, overcharging and over-discharging, or abnormal thermal management, which can lead to battery fires or even explosions, posing a serious threat to personnel safety and the surrounding environment.

[0003] Regarding the handling of fires in new energy vehicles, various fire extinguishing solutions have emerged in existing technologies. For example, spraying large amounts of cooling water or foam extinguishing agents onto the surface of the burning vehicle suppresses open flames; using fire hoses to cool the underside of the vehicle and the battery area; and employing dry powder or gas extinguishing methods to cover or isolate the flames to achieve initial fire suppression. However, for fires in new energy vehicles centered around the power battery, these methods have limited effectiveness in suppressing the continuous exothermic reaction inside the battery, and it is difficult to create a stable and continuous cooling environment within the complex structure of the vehicle's undercarriage, posing a high risk of reignition. In contrast, continuously cooling the power battery area using a liquid medium can more effectively suppress heat accumulation and the continued development of the reaction chain, offering greater stability and economic advantages. Therefore, immersion cooling fire extinguishing methods based on liquid media are considered a promising technological direction.

[0004] In practical applications, besides the issue of extinguishing medium utilization efficiency, the limitations of existing devices in terms of liquid retention capacity, sealing reliability, and rapid and convenient deployment have gradually become apparent. Currently, most conventional containment or dike-type water-based fire extinguishing devices rely on rigid structures for support, resulting in complex equipment structures and high transportation and deployment difficulties. They are not easily implemented quickly in complex terrain or confined spaces, failing to meet the requirements of speed and convenience in fire emergency response. Meanwhile, existing fixed parking space immersion fire extinguishing devices can only be used in a single parking space, failing to meet the requirements of flexible and portable deployment and economy. Furthermore, existing portable immersion fire extinguishing solutions, due to the obstruction caused by the contact between the vehicle tires and the ground, typically lack a waterproof base pad, instead encasing the entire dike around the vehicle. Their sealing effect requires a high degree of ground flatness, making them prone to leakage in complex ground conditions. This prevents the formation of a stable, long-term immersion environment under the vehicle, thus affecting fire extinguishing efficiency and safety.

[0005] Therefore, there is an urgent need for a submersible fire extinguishing device suitable for fires involving new energy vehicles. This device should be able to be deployed quickly and conveniently in a short period of time and form a stable, sealed submersible fire extinguishing space. This would solve the existing problems of insufficient deployment convenience, insufficient sealing reliability, difficulty in maintaining continuous and effective contact between the extinguishing liquid and the battery area, and low fire extinguishing efficiency. Summary of the Invention

[0006] This invention proposes an immersion-type fire extinguishing device suitable for fires involving new energy vehicles, belonging to the field of new energy vehicle fire protection technology. It solves the problems of insufficient deployment convenience, insufficient sealing reliability, difficulty in continuous and effective contact of extinguishing liquid with the battery area, and low fire extinguishing efficiency of existing fire extinguishing devices. By adopting a "lifting airbag + water tank" structure, the folded fire extinguishing device can be quickly pushed under the vehicle chassis when the vehicle catches fire. Then, the inflation is controlled to achieve the sequential process of vehicle lifting, underbody unfolding, and dike unfolding, forming a sealed water tank structure. This facilitates the rapid injection of fire extinguishing liquid, achieving immersion of the battery pack under the vehicle chassis. This achieves the functions of extinguishing fire, cooling, preventing the spread of fire, and inhibiting the reignition of the battery pack. It is especially suitable for complex and restricted fire rescue scenarios such as road traffic accidents, underground garages, and vehicle transport barges.

[0007] To achieve the above-mentioned technical objectives, the specific technical solution adopted by the present invention is as follows: A submersible fire extinguishing device suitable for fires involving new energy vehicles includes a lifting airbag, a water-proof base pad, and a flexible dike. The lifting airbag can lift the vehicle when inflated, creating a space off the ground. The water-proof base pad and the flexible dike, after being inflated and deployed in sequence, can work together to form a sealed water storage tank structure surrounding the vehicle body and its bottom, thus achieving the function of submersible fire extinguishing.

[0008] Furthermore, the lifting airbag, the water-proof base pad, and the flexible cofferdam are all inflatable and deflated flexible collapsible structures, which together constitute a foldable fire extinguishing component when not inflated.

[0009] Furthermore, the lifting airbag, the waterproof base pad, and the flexible cofferdam are each equipped with a universal air source independent interface to achieve independent control of the inflation and deflation processes of the lifting airbag, the waterproof base pad, and the flexible cofferdam.

[0010] Furthermore, the foldable fire extinguishing assembly, when not deployed, is limited to the area enclosed by the vehicle's four tires, allowing it to be pushed into the vehicle's underside as a whole from the front, rear, or left and right sides.

[0011] Furthermore, the surfaces of the lifting airbag, the waterproof base pad, and the flexible cofferdam are equipped with detachable simple fixing structures to constrain the lifting airbag, the waterproof base pad, and the flexible cofferdam in their uninflated, collapsed, and stored state, so as to maintain their compact shape in the folded state. The detachable simple fixing structures are automatically released or fail during the inflation and deployment process.

[0012] Furthermore, after inflation, the lifting airbag is used to lift the vehicle as a whole, so that the bottom of the vehicle and the tires are separated from the ground, creating enough space for the waterproof base pad to inflate and deploy. When inflated and supported, the lifting airbag forms a planar deployment structure to support the bottom of the vehicle. The shape of the planar deployment structure is one or more of the following: cross-shaped, square, circular, I-shaped, ring-shaped, star-shaped, or multi-branched.

[0013] Furthermore, during the transition from the collapsed and folded state to the deployed working state, the lifting airbag first inflates and deploys, the waterproof base pad then deploys in the space above the ground, and the flexible cofferdam then deploys upwards along the outer edge of the waterproof base pad. During the inflation and deployment process, the lifting airbag raises the vehicle to a greater vertical height than the waterproof base pad and the flexible cofferdam in the folded state, so as to avoid the waterproof base pad and the flexible cofferdam being obstructed or jammed during the deployment process.

[0014] Furthermore, during the inflation process, the waterproof base pad gradually unfolds in a controlled manner along the bottom of the vehicle and tires towards the outer periphery. Its unfolded size is larger than the projected area of ​​the bottom of the vehicle, thereby forming a continuous and complete liquid-retaining coverage area in the bottom area of ​​the vehicle and tires.

[0015] Furthermore, after inflation, the flexible cofferdam continuously expands along the outer periphery of the waterproof base, forming a sealed water storage tank structure with the waterproof base to contain fire extinguishing liquids.

[0016] Furthermore, the flexible cofferdam is set on the outer periphery of the waterproof base and connected to the waterproof base through a flexible sealing connection structure, so that the flexible cofferdam can expand upward along the outer edge of the waterproof base during the inflation process.

[0017] Furthermore, the waterproof base pad is laid out horizontally during inflation, while the flexible cofferdam is deployed vertically during inflation. The flexible cofferdam is inflated and deployed only after the waterproof base pad has been fully inflated and deployed, in order to avoid compression or jamming during the inflation and deployment process.

[0018] Furthermore, after the lifting airbag is fully deployed by the waterproof base and flexible cofferdam, it deflates and collapses to create a space between the lifting airbag and the vehicle chassis where the fire extinguishing liquid is submerged. The remaining inflation volume of the airbag can also serve as an expansion structure, thereby reducing the amount of fire extinguishing liquid used in the water storage tank and improving the efficiency of submersion fire extinguishing.

[0019] Furthermore, when the planar unfolding structure is a cross-shaped structure, it includes at least one longitudinal support section and at least one transverse support section. The cross-shaped structure, in its folded state without inflation, folds up longitudinally or laterally to form a narrow shape so as to be pushed into the bottom area of ​​the vehicle from the front, rear or left and right sides.

[0020] Furthermore, the flexible cofferdam adopts a rollable and foldable structure. The flexible cofferdam has multiple rollable and foldable areas along the horizontal direction, which allows the flexible cofferdam to buckle in a controlled manner in the collapsed state before it is unfolded, and to fold in a stacked and stored state along the height direction, forming a multi-layered and compact structure, thereby reducing the overall outer dimensions and making it easy to fold and store together with the waterproof base pad and push into the vehicle's bottom area as a whole.

[0021] Furthermore, the lifting airbag, the water-proof base pad, and the flexible cofferdam are all made of flexible fireproof materials with inflatable cavity structures. The flexible fireproof materials have high temperature resistance, puncture resistance, friction resistance, high pressure resistance, and good airtightness.

[0022] By adopting the above technical solution, the present invention can also bring the following beneficial effects: 1. The present invention proposes an immersion fire extinguishing device suitable for fires involving new energy vehicles. It employs a lifting structure combined with a foldable, deployable, flexible, inflatable, and deflated structure, allowing the fire extinguishing device to be compactly arranged within the area enclosed by the four tires of the vehicle when not in use. It can be quickly pushed in and deployed even when space under the vehicle is limited, making it particularly suitable for complex and constrained fire rescue scenarios such as complex roads, underground parking lots, vehicle transport barges, standard parking spaces, or densely parked adjacent vehicles. By orderly coordinating the dynamic process of "lifting-spreading-enclosing" during deployment, interference between different components at the lowest point of the vehicle's bottom or in the tire area is avoided, effectively reducing the risk of deployment obstruction or jamming. This improves the feasibility and reliability of the fire extinguishing device under complex conditions, offering advantages such as flexible deployment, smooth deployment, and wide adaptability to various scenarios.

[0023] 2. This invention proposes an immersion fire extinguishing device suitable for fires involving new energy vehicles. By forming a continuous and complete liquid-bearing coverage structure at the bottom of the vehicle, the extinguishing liquid can continuously and stably submerge key areas of the vehicle chassis, avoiding the unstable fire extinguishing effect caused by insufficient coverage or liquid leakage in traditional methods. It can effectively cover the bottom of the vehicle without repeated manual adjustments, improving the immersion degree of the extinguishing liquid in the power battery pack and its surrounding areas, thereby enhancing the consistency and reliability of the immersion fire extinguishing effect, reducing the number of liquid replenishments, and improving the overall fire extinguishing efficiency. At the same time, the water storage tank structure formed by the water-proof bottom pad and the flexible dike effectively contains and collects the extinguishing liquid and toxic and harmful wastewater generated during the fire extinguishing process, preventing the fire extinguishing wastewater from leaking into the surrounding environment, facilitating subsequent centralized recycling and treatment, thereby reducing the risk of pollution to the surrounding environment. It has the advantages of large coverage area, good sealing effect, and high fire extinguishing success rate.

[0024] 3. This invention proposes a submersible fire extinguishing device suitable for fires involving new energy vehicles. After forming a sealed submersible fire extinguishing space, the lifting and load-bearing functions are rationally allocated, allowing the vehicle weight to be stably supported by the waterproof base pad. This avoids the lifting structure being under high pressure for a long time during the fire extinguishing process, reducing the risk of structural fatigue and failure. In addition, after the waterproof base pad and flexible cofferdam are deployed, the airbag is deflated and collapsed, leaving a space for the fire extinguishing liquid to be submerged between the airbag and the chassis. The remaining majority of the inflated volume can act as an expansion structure, reducing the amount of fire extinguishing liquid used in the water storage tank and improving the efficiency of submersible fire extinguishing.

[0025] 4. This invention proposes an immersion fire extinguishing device suitable for fires involving new energy vehicles. The flexible fireproof material used combines high temperature resistance, puncture resistance, friction resistance, high pressure resistance, and excellent airtightness. The multifunctional material enables the device to maintain structural stability and functional reliability in high-temperature fire environments and complex ground conditions. While ensuring fire extinguishing safety, it effectively reduces gas source energy consumption and extends the service life of the device. It has the advantages of high structural safety, low energy consumption, and applicability to various fire scenarios involving new energy vehicles. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This invention provides a structural schematic diagram of an immersion fire extinguishing device suitable for fires involving new energy vehicles; Figure 2This is a schematic diagram showing the positional relationship between the vehicle and the flexible cofferdam in its deployed state in this embodiment; Figure 3 This is a schematic diagram showing the state in this embodiment where the lifting airbag is raised, the waterproof bottom pad is deployed, and the flexible cofferdam is not raised. Figure 4 For this embodiment Figure 3 A schematic diagram showing the positional relationship between the vehicle and the lifting airbag in this state; Figure 5 This is a schematic diagram of the structure in this embodiment, where the lifting airbag, the waterproof base pad, and the flexible cofferdam are all in a retracted state. Figure 6 This is a schematic diagram showing the positional relationship between the lifting airbag, the waterproof base pad, and the flexible cofferdam in the retracted state and the vehicle in this embodiment (viewed from the side of the vehicle). Figure 7 This is a schematic diagram showing the positional relationship between the lifting airbag, the waterproof base pad, and the flexible cofferdam in the retracted state and the vehicle in this embodiment (placed from the front and rear direction of the vehicle). Figure 8 This is a diagram showing the submersion state of the vehicle after it has been filled with fire extinguishing fluid in this embodiment; The components include: 1. Lifting airbags; 2. Waterproof base pads; 3. Flexible cofferdams; and 4. Vehicles. Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0033] Example 1, such as Figures 1 to 8 As shown, the present invention provides an immersion fire extinguishing device suitable for fires involving new energy vehicles, including a lifting airbag 1 for lifting the bottom of the vehicle 4, a water-proof base pad 2 disposed under the vehicle 4 for carrying fire extinguishing liquid, and a flexible dike 3 surrounding the vehicle 4 to form a closed immersion fire extinguishing space.

[0034] The lifting airbag 1, the water-proof base pad 2, and the flexible cofferdam 3 are all made of flexible fireproof materials with inflatable cavity structures. The flexible fireproof materials have high temperature resistance, puncture resistance, friction resistance, high pressure resistance, and good air tightness. They can be made of high temperature resistant flexible composite materials or coated fabric materials that have mature products in the existing technology and are widely used in equipment such as fire water bags, inflatable barriers, emergency rescue airbags, or protective air cushions. In existing applications, such materials can maintain a stable shape and withstand external loads in the inflated state, thereby meeting the structural support and stability requirements of this invention in actual use.

[0035] The lifting airbag 1, the water-proof base pad 2, and the flexible dike 3 are all in a collapsed and folded state when not inflated, and together they form a foldable fire extinguishing assembly. The foldable fire extinguishing assembly is laid flat on the ground when not unfolded, and its outer dimensions are limited to the area enclosed by the four tires of the vehicle 4. This allows it to be pushed into the bottom area of ​​the vehicle 4 from either the left or right side without lifting or moving the vehicle 4. In practical use, for parking areas where the vehicle's operating direction is restricted, such as parking lots, it can also be adjusted to be pushed into the bottom area of ​​the vehicle 4 from the front or rear of the vehicle.

[0036] To ensure structural stability in the folded state, the lifting airbag 1, the waterproof base pad 2, and the flexible cofferdam 3 are constrained by detachable simple fixing structures on their surfaces when collapsed and stored. This ensures the foldable fire extinguishing assembly maintains a compact shape during insertion. These detachable simple fixing structures automatically disengage or fail under inflation pressure during subsequent inflation and deployment, without affecting the normal deployment of the components. The specific structural form of the detachable simple fixing structure varies depending on the folding method, storage volume, and ease of use, and can employ Velcro fasteners, snap-on connections, or easily breakable connections. One or more of the following methods are used: the corresponding Velcro fasteners bind and fix the folded structure through the adhesive part set on the surface or edge area, and automatically separate under the action of external force during the inflation and unfolding process; the snap-type connection structure automatically disengages or fails under the action of tension during inflation and unfolding; the easy-break connection structure breaks after reaching the set tension, thereby releasing the constraint on the folded structure. The above-mentioned detachable simple fixing structures can be set individually or in combination according to the actual folding method and structural requirements. Their specific quantity, arrangement position and structural form are not limited, and all adopt the existing connection structure.

[0037] The flexible cofferdam 3 adopts a curling and folding structure. The flexible cofferdam 3 has multiple curling and folding areas along the horizontal direction, which allows the flexible cofferdam 3 to buckle in a controlled manner at the curling and folding areas when it is not unfolded, and to fold in a stacked and stored state along the height direction. This makes the flexible cofferdam 3 form a compact multi-layered structure when it is not inflated, thereby reducing the overall outer dimensions and making it easier to store together with the waterproof base pad 2 and push into the bottom area of ​​the vehicle 4 as a whole.

[0038] In this embodiment, the interior of the lifting airbag 1, the water-proof bottom pad 2, and the flexible cofferdam 3 is provided with several reinforcing partition structures according to the structural dimensions and deployment shape. These structures are used to divide the internal cavity into regions to limit the overall deformation under the inflated or liquid-bearing state. These reinforcing partition structures can take the form of diaphragms, reinforcing strips, or internal connecting pieces. Their specific number, shape, and arrangement are not limited, and they can all be used as long as they do not affect the normal deployment and functional realization of each component.

[0039] The lifting airbag 1, the waterproof base pad 2, and the flexible cofferdam 3 are each equipped with an independent air source interface and are connected to an air source. This allows for independent inflation and deflation of the lifting airbag 1, the waterproof base pad 2, and the flexible cofferdam 3 in a zoned control mode. Through the zoned control method, the lifting airbag 1, the waterproof base pad 2, and the flexible cofferdam 3 can be deployed sequentially according to a predetermined deployment order, avoiding mutual interference between different components during deployment.

[0040] The lifting airbag 1 is located below the bottom of the vehicle 4, within the area enclosed by the four tires of the vehicle 4. In its inflated and deployed state, the lifting airbag 1 forms a planar deployment structure to support the chassis and tire bottoms of the vehicle 4. In this embodiment, the planar deployment structure adopts a square shape to adapt to the bottom structure of the vehicle 4 and provide stable force support. During inflation, the lifting airbag 1 applies a vertical supporting force to the bottom of the vehicle 4, creating a ground-level deployment space between the chassis and tires. The vertical height of this deployment space is greater than the vertical height of the waterproof base pad 2 and the flexible dam 3 in their folded state, thus providing the necessary space for the waterproof base pad 2 and the flexible dam 3 to smoothly pass through the lowest point of the vehicle 4 and the tire bottoms during subsequent deployment.

[0041] The waterproof base pad 2, when deflated, can be laid flat against the ground and pushed into the area under the vehicle 4 along with the foldable fire extinguishing assembly. After the lifting airbag 1 completes the lifting of the vehicle 4's bottom and creates an unfolding space, the waterproof base pad 2 is inflated, causing it to gradually unfold outwards along the bottom of the vehicle 4 within the unfolding space between the vehicle 4's bottom and the ground. After inflation and unfolding, the waterproof base pad 2's unfolded size is larger than the projected area of ​​the vehicle 4's bottom, thus forming a continuous and complete liquid-retaining coverage area under the vehicle 4 and below the tires. This area is used to hold the extinguishing liquid injected during fire extinguishing and prevents the extinguishing liquid from leaking outwards.

[0042] The flexible cofferdam 3 is located on the outer edge of the waterproof base pad 2 and is connected to the waterproof base pad 2 through a flexible sealing connection structure. After the waterproof base pad 2 is fully deployed and forms a continuous liquid-bearing coverage area, the flexible cofferdam 3 is inflated, causing it to expand upwards along the outer edge of the waterproof base pad 2. After inflation and deployment, the flexible cofferdam 3 forms a cofferdam-type airbag structure surrounding the vehicle 4. Its enclosure shape can be rectangular or annular, and together with the waterproof base pad 2, it forms a closed water storage tank structure for containing extinguishing liquid, thereby forming a complete immersion extinguishing space at the bottom of the vehicle 4. In some restricted working conditions, such as when the flexible cofferdam 3 cannot be fully deployed in some areas or when the waterproof base pad 2 has local wrinkles in some locations, as long as the overall structure can form a continuous liquid-bearing area at the bottom and around the vehicle 4 and maintain the extinguishing liquid level, it can meet the actual use requirements of immersion extinguishing and will not affect the cooling and extinguishing effect on the battery area of ​​the vehicle 4.

[0043] In this embodiment, the flexible sealing connection structure is disposed between the lower edge of the flexible cofferdam 3 and the outer peripheral edge of the waterproof base pad 2. The connection method can be one or more of the following: hot-press welding, bonding, sewing and then gluing, interlocking connection, or connection through a flexible connecting strip. This allows the flexible cofferdam 3 to unfold upward along the outer edge of the waterproof base pad 2 during the unfolding process and maintain a stable relative position. The purpose of the above connection structure is to achieve a continuous seal between the flexible cofferdam 3 and the waterproof base pad 2. The specific structural form and process are not limited. As long as the fire extinguishing liquid can be prevented from leaking from the connection between the flexible cofferdam 3 and the waterproof base pad 2 in the unfolded state, it should be understood as falling within the protection scope of this invention.

[0044] The enclosure shape of the corresponding cofferdam-type airbag structure is not limited to rectangle or ring. It can also be set as a regular geometric shape including circle, square, ellipse, hexagon or octagon according to actual use requirements. In addition, the enclosure structure formed by equivalent transformation or approximate deformation of the above regular geometric shape should also be understood to fall within the protection scope of this invention. In the use of this embodiment, the interior of the lifting airbag 1, the water-proof bottom pad 2 and the flexible cofferdam 3 can be provided with several partition layers as needed to partition and constrain the internal cavity of the airbag during inflation, so as to prevent inflation deformation and maintain its designed unfolding shape. The corresponding reinforcing structure of the flexible cofferdam 3 can be used to limit local bulging during its vertical unfolding, so that the overall outline of the flexible cofferdam 3 remains stable.

[0045] During the transition from the collapsed and folded state to the deployed working state, the inflation and lifting of the lifting airbag 1, the deployment of the waterproof base pad 2, and the vertical deployment of the flexible cofferdam 3 are completed sequentially through zoned air source control. Because the vertical lifting height formed by the lifting airbag 1 during inflation is greater than the vertical height of the waterproof base pad 2 and the flexible cofferdam 3 in the folded state, the waterproof base pad 2 and the flexible cofferdam 3 can smoothly pass through the lowest position of the vehicle 4 and the area under the tires during deployment, thereby avoiding obstruction or jamming during deployment.

[0046] In actual rescue operations, the deployment sequence of the lifting airbag 1, the water-proof base pad 2, and the flexible cofferdam 3 can be appropriately adjusted according to the parking status of the vehicle 4, the limited operating space, and the on-site rescue conditions. Under the premise of not affecting the formation of a continuous liquid-bearing coverage area by the water-proof base pad 2 and the completion of the enclosure by the flexible cofferdam 3, it is permissible to combine or simplify some deployment steps to improve on-site handling efficiency.

[0047] Example 2: When a new energy vehicle is in an underground parking lot, multi-level parking garage, vehicle transport barge, standard parking space, or when adjacent vehicles 4 are densely parked, the operating space on the left and right sides and front and rear of the vehicle 4 is limited, making it difficult to deploy the fire extinguishing device from the side of the vehicle 4. The lifting airbag 1, the water-proof base pad 2, and the flexible cofferdam 3 can still form a folded fire extinguishing component in the collapsed and folded state without being inflated. The component is arranged on the ground in the area surrounded by the four tires of the vehicle 4 and is delivered to the bottom area of ​​the vehicle 4 from the front or rear of the vehicle 4 without moving the vehicle 4 or adjacent vehicles 4.

[0048] Under this condition, the corner areas of the waterproof base pad 2 and the flexible cofferdam 3 remain collapsed and are folded and stored together with the waterproof base pad 2, without forming a rigid corner structure that would affect the delivery process. This avoids interference with the tires, suspension or chassis structure when the components are delivered to the bottom of the vehicle 4. After the stacked fire extinguishing components are deployed at the bottom of the vehicle 4, the lifting airbag 1 is inflated first to raise the bottom of the vehicle 4 to form a space off the ground, and then the waterproof base pad 2 is inflated to complete the deployment. Subsequently, the flexible cofferdam 3 is inflated to expand upward along the outer edge of the waterproof base pad 2, forming a complete and enclosed immersion fire extinguishing space at the bottom of the vehicle 4 under the condition of limited lateral space.

[0049] Example 3: After the immersion fire extinguishing device has been deployed and formed a closed immersion fire extinguishing space at the bottom of vehicle 4, the working state of the lifting airbag 1 is adjusted according to the fire duration, the amount of fire extinguishing liquid injected, and the stability requirements of vehicle 4, so as to switch the load-bearing mode of vehicle 4.

[0050] In the initial stage, the lifting airbag 1 is in an inflated support state, used to provide vertical support for the bottom of the vehicle 4 and form the ground clearance required for deployment. After the water-proof base pad 2 and the flexible cofferdam 3 have been deployed and together with the bottom of the vehicle 4 form a closed water storage tank structure, the lifting airbag 1 is deflated by controlled deflation, causing the lifting airbag 1 to gradually collapse, thereby transferring the weight of the vehicle 4 from the lifting airbag 1 to the water-proof base pad 2.

[0051] During the load-bearing switching process, the water-proof base pad 2 remains inflated and deployed, forming a liquid-bearing coverage area that is continuously distributed under the bottom of the vehicle 4 and beneath the tires, capable of bearing the weight of the vehicle 4 while simultaneously bearing the extinguishing liquid. After the lifting airbag 1 deflates and collapses, it forms a submerged space between itself and the chassis of the vehicle 4 to accommodate the extinguishing liquid. Furthermore, the lifting airbag 1 retains a certain amount of inflation volume even when not fully deflated, forming an expansion support structure within the water storage tank structure. This ensures sufficient submerged space while reducing the amount of extinguishing liquid used, thereby improving the liquid submersion speed and efficiency. During the fire extinguishing process, even if the supporting capacity of the lifting airbag 1 decreases due to high temperature or external environmental influences, the water storage tank structure formed by the water-proof base pad 2 and the flexible cofferdam 3 can still independently maintain the containment and retention of the extinguishing liquid, allowing the fire extinguishing process to naturally transition from a "lifting-submersion" mode to a "containment-submersion" mode, thus ensuring the continuity of the submersion fire extinguishing process.

[0052] In Example 4, the planar deployment structure formed by the lifting airbag 1 in the inflated and deployed state can be configured in different shapes according to the bottom structural characteristics and stress requirements of the vehicle 4. The planar deployment structure can adopt one or more of the following shapes: cross-shaped, circular, ring-shaped, I-shaped, star-shaped or multi-branched.

[0053] When the lifting airbag 1 adopts a cross-shaped structure, it includes longitudinal support sections and transverse support sections arranged in a cross pattern. The longitudinal support sections extend along the front-rear direction of the vehicle 4, and the transverse support sections extend along the left-right direction of the vehicle 4, so that the lifting airbag 1 forms multi-directional force support at the bottom of the vehicle 4. In the folded state when it is not inflated, the cross-shaped structure can be folded up in the longitudinal or transverse direction to form a narrow shape, which is convenient to push into the bottom area of ​​the vehicle 4 from the front or rear side of the vehicle 4.

[0054] When the lifting airbag 1 adopts a circular, annular, I-shaped, star-shaped, or multi-branched structure, it forms a continuous or multi-point distributed support area along the bottom of the vehicle 4 after inflation and deployment, in order to adapt to different chassis structures of the vehicle 4 or working conditions where local space is limited; different shapes of the lifting airbag 1 can form a compact collapsed structure in the folded state, and its outer dimensions are limited to the area enclosed by the four tires of the vehicle 4, without affecting the deployment process of the foldable fire extinguishing assembly being pushed into the bottom of the vehicle 4.

[0055] In this embodiment, the unfolding form of the planar unfolding structure is not limited to a single form. It can also be a composite unfolding form formed by combining cross-shaped, circular, ring-shaped, I-shaped, star-shaped, or multi-branched structures. Without changing the basic function of the unfolding structure in forming a cofferdam-type airbag, the equivalent or approximately deformed structures generated by the above unfolding forms should be understood as falling within the protection scope of this invention.

[0056] In summary, this invention, through the coordinated arrangement of the lifting airbag 1, the water-proof base pad 2, and the flexible dike 3, constructs an expandable submersible fire extinguishing space at the bottom of the vehicle 4. This allows the device to be compactly arranged and smoothly delivered into the bottom area of ​​the vehicle 4 when not in use, and to reliably deploy under space-constrained conditions. The reasonable deployment sequence and load-bearing method switching design effectively avoids interference or jamming during deployment, and reduces the long-term stress on the lifting mechanism after the submersible fire extinguishing space is formed, thereby improving the stability and safety of the device under complex working conditions. Simultaneously, the formed water storage tank structure effectively contains and collects fire extinguishing liquids and wastewater, facilitating subsequent recycling and reducing the risk of pollution to the surrounding environment. In conclusion, this invention has the advantages of simple structure, convenient use, reliable sealing, strong adaptability, and high fire extinguishing efficiency.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A submersible fire extinguishing device suitable for fires involving new energy vehicles, characterized in that: It includes a lifting airbag, a water-proof base pad, and a flexible dike. The lifting airbag can lift the vehicle when inflated, creating a space off the ground. The water-proof base pad and the flexible dike, after being inflated and deployed in sequence, can work together to form a sealed water storage tank structure surrounding the vehicle body and bottom, achieving a submersible fire extinguishing function.

2. The immersion fire extinguishing device for new energy vehicle fires according to claim 1, characterized in that: The lifting airbag, the water-proof base pad, and the flexible cofferdam are all inflatable and collapsible flexible structures, which together form a foldable fire extinguishing assembly when not inflated.

3. The immersion fire extinguishing device for new energy vehicle fires according to claim 2, characterized in that: The lifting airbag, the waterproof base pad, and the flexible cofferdam are each equipped with an independent universal air source interface to enable independent control of the inflation and deflation processes of the lifting airbag, the waterproof base pad, and the flexible cofferdam.

4. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to claim 2 or 3, characterized in that: The foldable fire extinguishing assembly, when not unfolded, is limited to the area enclosed by the four tires of the vehicle, so that it can be pushed into the underside of the vehicle as a whole from the front, rear, or left and right sides.

5. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to claim 4, characterized in that: The lifting airbag, the waterproof base pad, and the flexible cofferdam are equipped with detachable simple fixing structures on their surfaces. These structures are used to restrain the lifting airbag, the waterproof base pad, and the flexible cofferdam in their uninflated, collapsed, and stored state, so as to maintain their compact shape in the folded state. The detachable simple fixing structures are automatically released or fail during the inflation and unfolding process.

6. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to any one of claims 1 to 5, characterized in that: After inflation, the lifting airbag is used to lift the vehicle as a whole, so that the bottom of the vehicle and the tires are separated from the ground, creating a space that allows the waterproof base pad to be inflated and deployed. When inflated and supported, the lifting airbag forms a planar deployment structure to support the bottom of the vehicle. The shape of the planar deployment structure is one or more of the following: cross-shaped, square, circular, I-shaped, ring-shaped, star-shaped, or multi-branched.

7. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to claim 6, characterized in that: During the transition from the collapsed and folded state to the unfolded working state, the lifting airbag first inflates and unfolds, the waterproof base pad then unfolds in the above-ground space, and the flexible cofferdam then unfolds upward along the outer edge of the waterproof base pad. During the inflation and unfolding process, the lifting airbag raises the vehicle to a vertical height greater than the vertical height of the waterproof base pad and the flexible cofferdam in the folded state, so as to avoid the waterproof base pad and the flexible cofferdam being obstructed or jammed during the unfolding process.

8. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to claim 6 or 7, characterized in that: During inflation, the waterproof base pad gradually unfolds outwards along the bottom of the vehicle and tires, with its unfolded size exceeding the projected area of ​​the vehicle's bottom, thus forming a continuous and complete liquid-bearing coverage area in the area under the vehicle and tires. The flexible cofferdam unfolds continuously along the outer periphery of the waterproof base pad after inflation, and together with the waterproof base pad, forms a sealed water storage tank structure for containing fire extinguishing liquid.

9. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to claim 8, characterized in that: The flexible cofferdam is set on the outer periphery of the waterproof base pad and connected to the waterproof base pad through a flexible sealing connection structure. During inflation, the flexible cofferdam unfolds upward along the outer edge of the waterproof base pad. The waterproof base pad unfolds horizontally during inflation, and the flexible cofferdam unfolds vertically during inflation. The flexible cofferdam is inflated and unfolded only after the waterproof base pad has been fully inflated and unfolded, in order to avoid compression or jamming during inflation and unfolding.

10. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to claim 9, characterized in that: After the lifting airbag is fully deployed by the waterproof base and flexible cofferdam, it deflates and collapses to create a space between the lifting airbag and the vehicle chassis for immersion in fire extinguishing liquid. This allows the remaining inflation volume of the airbag to act as an expansion structure, reducing the amount of fire extinguishing liquid used in the water storage tank and improving the efficiency of immersion fire extinguishing.

11. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to claim 10, characterized in that: The flexible cofferdam adopts a rollable and foldable structure. The flexible cofferdam has multiple rollable and foldable areas along the horizontal direction, which allows the flexible cofferdam to bend in a controlled manner in the collapsed state before it is unfolded, and to be folded in a stacked and stored state along the height direction, forming a multi-layered and compact structure, thereby reducing the overall outer size and making it easy to fold and store together with the waterproof base pad and push into the bottom area of ​​the vehicle as a whole.

12. A submersible fire extinguishing device suitable for fires involving new energy vehicles according to claim 11, characterized in that: The lifting airbag, the water-proof base pad, and the flexible cofferdam are all made of flexible fireproof material with an inflatable cavity structure. The flexible fireproof material has high temperature resistance, puncture resistance, friction resistance, high pressure resistance, and good airtightness.

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