Gravity jacking fire-fighting cover, fire-fighting device and battery replacing station

By utilizing the gravity-driven linkage mechanism of the thermal runaway battery to form a sealed partition space within the battery swapping station, and combining it with fire extinguishers for fire suppression, the problems of large footprint, high cost, and complex fire suppression in battery swapping stations have been solved, achieving the effects of simplifying the fire suppression process and reducing costs.

CN224099862UActive Publication Date: 2026-04-10SHANGHAI RONGHE ZHIDIAN NEW ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI RONGHE ZHIDIAN NEW ENERGY CO LTD
Filing Date
2025-04-01
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

Existing battery swapping stations lack independent fire compartments, resulting in large land areas, complex construction, high costs, and cumbersome fire-fighting processes.

Method used

The fire hood is lifted by gravity and uses the weight of the thermal runaway battery to drive the linkage mechanism and telescopic mechanism to form a sealed partition space, which is equipped with fire extinguishers for fire fighting.

Benefits of technology

This reduces the footprint of the battery swapping station, lowers construction difficulty and costs, and simplifies the fire protection process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a gravity jacking fire-fighting cover, a fire-fighting device and a battery swap station, the gravity jacking fire-fighting cover is used for providing a partition space meeting fire fighting for equipment to be subjected to fire fighting, and the gravity jacking fire-fighting cover comprises a base; the flexible cover body is arranged on the base, the bottom of the flexible cover body is in sealed connection with the base, an opening is formed in the top of the flexible cover body, and the opening is used for taking and placing equipment to be subjected to fire fighting; one end of the telescopic mechanism is connected with the base, and the other end of the telescopic mechanism is connected with the top of the flexible cover body; and the connecting rod mechanism is arranged on the base and is connected with the telescopic mechanism. According to the utility model, an extra fire-fighting cabin does not need to be arranged at a position outside the battery swap station, but the fire-fighting cabin is formed by installing the gravity jacking fire-fighting cover with an unpowered mechanical structure on the existing battery swap cabin position, so that the transportation of equipment to be subjected to fire fighting is facilitated, the installation is convenient, the occupied area can be reduced, and the construction difficulty and the manufacturing cost are reduced.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery swap station, especially to gravity jacking fire cover, fire fighting device and battery swap station. BACKGROUND

[0002] At present, with the rapid development of new energy industry, as the key infrastructure, the construction and operation of battery swap station have become an important direction of industry development. Among them, the fire protection problem of battery swap station is very important, but for the fire protection problem, the existing battery swap station does not have an independent fire protection room, so it needs to additionally increase a set of power device to push the thermal runaway battery out of the battery swap station for fire extinguishing, which undoubtedly increases the complexity of construction and operation. On the one hand, due to the additional power device and the space layout necessary to meet the demand of pushing out the battery, the land occupation of the battery swap station is relatively large, and accordingly, the construction cost is also greatly increased. On the other hand, when the supporting power device pushes out the thermal runaway battery, not only is a very high requirement put forward for the sealing protection of the outside of the battery swap station to prevent the overflow of smoke, fire and other things in the process of pushing out the battery, but also strict requirements are put forward for the structure design of the whole station, so that the overall cost of the battery swap station is high. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the utility model provides gravity jacking fire cover, fire fighting device and battery swap station, which are used to solve the problems of large land occupation, complex construction, high cost and complicated fire fighting process of the fire protection facilities in the prior art battery swap station.

[0004] To achieve the above-mentioned purpose and other related purposes, the first aspect of the utility model provides a gravity jacking fire cover for providing a fire protection equipment with a fire protection partition space, comprising: a base; a flexible cover body, which is arranged on the base, and the bottom of the flexible cover body is sealingly connected with the base, and the top of the flexible cover body is provided with an opening for taking and placing the fire protection equipment; a telescopic mechanism, one end of which is connected with the base, and the other end is connected with the top of the flexible cover body; and a connecting rod mechanism, which is arranged on the base and connected with the telescopic mechanism.

[0005] In some embodiments of the first aspect of the utility model, the connecting rod mechanism comprises a support assembly and a sliding assembly; the support assembly is connected with the sliding assembly.

[0006] In some embodiments of the first aspect of the utility model, the support assembly comprises a fixed support, a first support rod and a second support rod; wherein the fixed support is arranged on the base, one end of the first support rod is rotatably connected with the fixed support, the first support rod is further connected with one end of the second support rod through a rotating shaft, and the other end of the second support rod is connected with the sliding assembly.

[0007] In some embodiments of the first aspect of the utility model, the sliding assembly comprises left-right symmetrically arranged slide rails, connecting rods and left-right symmetrically arranged sliding blocks; each of the slide rails is provided with a sliding groove; each of the sliding blocks is slidingly arranged in the sliding groove; and the connecting rods are connected between the sliding blocks.

[0008] In some embodiments of the first aspect of the utility model, the sliding assembly comprises left-right symmetrically arranged slide rails, connecting rods and left-right symmetrically arranged sliding blocks; each of the slide rails is provided with a sliding groove; each of the sliding blocks is slidingly arranged in the sliding groove; and the connecting rods are connected between the sliding blocks.

[0009] In some embodiments of the first aspect of the utility model, the telescopic mechanism is a scissor fork structure.

[0010] In some embodiments of the first aspect of the utility model, the scissor fork structure is a multi-stage scissor fork.

[0011] In some embodiments of the first aspect of the utility model, the flexible cover body is a tarpaulin.

[0012] To achieve the above object and other related objects, the second aspect of the utility model provides a fire-fighting device, comprising: a fire-fighting appliance; and the gravity lifting fire cover as described above.

[0013] To achieve the above object and other related objects, the third aspect of the utility model provides a battery swap station, comprising: a plurality of battery swap bays and a fire-fighting bay; the fire-fighting device as described above is arranged in the fire-fighting bay; and a thermal runaway battery is arranged on a base, and the partition space formed by the gravity lifting fire cover cooperates with the fire-fighting appliance to perform fire-fighting on the thermal runaway battery.

[0014] As described above, the gravity lifting fire cover, the fire-fighting device and the battery swap station provided by the utility model have the following beneficial effects:

[0015] The utility model does not need to arrange an additional fire-fighting bay at a position outside the battery swap station, but forms the fire-fighting bay by installing the gravity lifting fire cover with the unpowered mechanical structure on the existing battery swap bay, facilitates transportation of the fire-fighting equipment, is convenient to install, can also reduce the floor area, and thus reduces construction difficulty and manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A folding side view of a gravity lifting fire cover in an embodiment of the utility model is shown.

[0017] Figure 2 An unfolding side view of a gravity lifting fire cover in an embodiment of the utility model is shown.

[0018] Figure 3 Figure 2 shows a plan view of a gravity lifting fire cover according to an embodiment of the present application.

[0019] Figure 4 Figure 3 shows a structural schematic view of a battery swap station according to an embodiment of the present application.

[0020] Figure 5 Figure 4 shows another structural schematic view of a battery swap station according to an embodiment of the present application.

[0021] Element number explanation

[0022] 1 base

[0023] 2 flexible cover

[0024] 3 telescopic mechanism

[0025] 41 fixed support

[0026] 42 first support rod

[0027] 43 second support rod

[0028] 51 slide rail

[0029] 52 slide block

[0030] 53 spring support

[0031] 54 spring

[0032] 55 connecting rod DETAILED DESCRIPTION

[0033] The implementation of the present application will be described by specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present specification.

[0034] It is to be understood that the structures, proportions, sizes, and the like shown in the drawings accompanying the present specification are merely intended to facilitate understanding of the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which the present application can be implemented, and therefore do not have substantial technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the present application can produce, should still fall within the scope of the technical content disclosed by the present application. The following detailed description should not be considered limiting, and the scope of the embodiments of the present application is limited only by the claims of the published patent. The terms used herein are only intended to describe the specific embodiments, and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "under", "bottom", "above", "top", and the like, can be used in the specification to facilitate the description of the relationship between one element or feature shown in the drawings and another element or feature.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "holding" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Furthermore, as used in this document, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the terms "comprise", "comprising", "include", "including" and / or "contain", "containing" indicate the presence of the described features, operations, elements, components, items, categories, and / or groups, but do not exclude the presence or addition of one or more other features, operations, elements, components, items, categories, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the embodiments of the present application is further described in detail in the following embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only intended to explain the present application, and are not intended to limit the present application.

[0038] AsFigure 1 and Figure 2 As shown in the structure schematic diagram of the gravity jacking fire cover in the embodiment of the utility model, the gravity jacking fire cover in the embodiment is used for providing the partition space meeting the fire protection for the fire protection equipment, and comprises:

[0039] The base 1;

[0040] The flexible cover body 2 is arranged on the base 1, and the bottom of the flexible cover body 2 is sealingly connected with the base 1; the top of the flexible cover body 2 is provided with an opening, and the opening is used for taking and placing the fire protection equipment;

[0041] The telescopic mechanism 3 is connected with the base 1 at one end and connected with the top of the flexible cover body 2 at the other end;

[0042] The connecting rod mechanism is arranged on the base 1 and connected with the telescopic mechanism 3.

[0043] In combination with Figure 1 and Figure 2 It is explained that in the initial state, the telescopic mechanism 3 is in the state of contraction and closing, and the flexible cover body 2 is in the state of folding; when the fire protection equipment is placed on the base 1, the fire protection equipment is pressed on the connecting rod mechanism at this time, the connecting rod mechanism is driven to move by the weight of the fire protection equipment, and further drives the telescopic mechanism 3 to stretch upwards, and further drives the top of the flexible cover body 2 to move upwards until the fire protection equipment is covered, so that the partition space meeting the fire protection is formed;

[0044] When the fire protection equipment is taken off, the pressure on the connecting rod mechanism from the fire protection equipment disappears, the connecting rod mechanism is reversely driven to move, and the telescopic mechanism 3 is contracted and closed, the flexible cover body 2 is folded back, and the gravity jacking fire cover is reset to the initial state.

[0045] Specifically, when the fire protection equipment is placed on the base 1, the fire protection equipment continuously contacts the connecting rod mechanism and applies pressure to the connecting rod mechanism, so that the connecting rod mechanism is driven to move. The movement further drives the telescopic mechanism 3 to stretch upwards, and since the telescopic mechanism 3 is connected with the top of the flexible cover body 2, the stretching of the telescopic mechanism 3 drives the top of the flexible cover body 2 to move upwards, so that the fire protection equipment is covered, and the partition space meeting the fire protection requirement is constructed.

[0046] When the fire protection equipment is taken off, the pressure on the connecting rod mechanism from the fire protection equipment disappears, the connecting rod mechanism is reversely driven to move based on the mechanical properties of the connecting rod mechanism, and the movement drives the telescopic mechanism 3 to contract and close. With the contraction of the telescopic mechanism 3, the flexible cover body 2 is folded back, and the whole gravity jacking fire cover is in the state of contraction.

[0047] In some examples, as Figure 1 andFigure 2 As shown, the telescopic mechanism 3 is a scissor fork structure. Its structure is compact and simple, easy to maintain and maintain, and has a small volume in the contracted state, does not occupy too much space, and is convenient to store.

[0048] In some examples, as shown in Figure 1 and Figure 2 , the scissor fork structure is a multi-stage scissor fork. The scissor fork is composed of two groups of interlocking levers, which can produce a scissor-like opening and closing action. This structure can be flexibly adjusted in height as needed to adapt to different height workspaces and work requirements.

[0049] In some examples, as shown in Figure 1 and Figure 2 , the flexible cover 2 is a tarpaulin. The tarpaulin has the characteristics of soft texture and good flexibility, and can well adapt to the up and down movement driven by the telescopic mechanism 3, ensuring that there is no obstruction or damage during the stretching and retracting process due to the material being too hard. At the same time, the tarpaulin has certain fireproof and flame-retardant properties, which is crucial for realizing the function of fireproof partition space, and can effectively delay the spread of fire and gain more time for fire rescue.

[0050] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , the connecting rod mechanism includes a support assembly and a sliding assembly; the support assembly is connected with the sliding assembly. One end of the bottom of the telescopic mechanism 3 is fixed on the base 1, and the other end of the bottom is connected with the sliding assembly, and the telescopic mechanism 3 can be stretched and retracted in the vertical direction as the sliding assembly slides.

[0051] The support assembly and the sliding assembly cooperate to realize the stretching and retraction of the telescopic mechanism. The specific working principle is: when the fire-fighting equipment to be placed on the base contacts the support assembly in the connecting rod mechanism provided on the base and applies pressure to it, the fire-fighting equipment pushes the support assembly, the support assembly drives the sliding assembly to slide, and the sliding assembly drives the telescopic mechanism to rise, thereby realizing the expansion of the telescopic mechanism. When the fire-fighting equipment to be taken away from the base, the pressure from the fire-fighting equipment to the support assembly in the connecting rod mechanism disappears, and the support assembly moves in the opposite direction to pull back the sliding assembly, thereby driving the telescopic mechanism to retract and close.

[0052] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3As shown, the support assembly comprises a fixed support 41, a first support rod 42 and a second support rod 43; wherein the fixed support 41 is arranged on the base 1, one end of the first support rod 42 is rotatably connected with the fixed support 41, and the first support rod 42 is further connected with one end of the second support rod 43 through a rotating shaft; the other end of the second support rod 43 is connected with the sliding assembly. Preferably, the middle part of the first support rod 42 is connected with one end of the second support rod 43 through a rotating shaft.

[0053] It should be noted that the fixed support 41 is used to provide a stable basic support point for the entire support assembly. One end of the first support rod 42 is rotatably connected with the fixed support 41, so that the first support rod 42 can be positioned and supported in a corresponding position with the fixed support 41 as a reference. The middle part of the first support rod 42 is connected with one end of the second support rod 43 through a rotating shaft, and the rotating shaft connection enables the first support rod 42 and the second support rod 43 to rotate relative to each other according to actual working conditions and mechanical movement requirements, so as to flexibly adjust the included angle between them.

[0054] The other end of the second support rod 43 is connected with the sliding assembly, and the second support rod 43 can transmit the support force from the fixed support 41 and the first support rod 42 to the sliding assembly, while cooperating with the movement characteristics of the sliding assembly to realize the smooth running and related functions of the entire mechanical structure under different working conditions.

[0055] In some embodiments, as shown in Figure 1 、 Figure 2 and Figure 3 The sliding assembly comprises left and right symmetrically arranged slide rails 51, connecting rods 55 and left and right symmetrically arranged sliding blocks 52; each of the slide rails 51 is provided with a sliding groove; each of the sliding blocks 52 is slidably arranged in the sliding groove; and each of the sliding blocks 52 is connected through the connecting rod 55. The other end of the bottom of the telescopic mechanism is connected with the sliding block 52, and when the sliding block 52 reciprocally slides in the slide rail, it drives the telescopic mechanism of the scissor fork structure to produce a shearing action similar to the opening and closing of a scissor, thereby realizing extension or contraction.

[0056] The sliding assembly comprises left and right symmetrical slide rails 51, and each slide rail is provided with a sliding block 52 corresponding thereto, and the sliding blocks 52 are connected to each other through a connecting rod 55, that is, the two ends of the connecting rod 55 are connected to the sliding blocks 52, and the other end of the second supporting rod 43 is connected to the connecting rod 55. The slide rail 51 is fixedly installed on the base 1, so as to ensure that the sliding block can move stably along the preset track when sliding. A sliding groove is formed in the slide rail 51, and the sliding groove provides a limiting track for the movement of the sliding block 52. The other end of the second supporting rod 43 is connected to the middle part of the connecting rod 55, and the second supporting rod 43 drives the connecting rod 55 to slide when rotating, so as to drive the sliding block 52 to slide on the slide rail 51, and the coordinated operation of the supporting assembly and the sliding assembly is realized, so as to meet the requirements of position adjustment, movement guidance and force transmission and the like of the entire mechanical structure under different working conditions, and ensure that the entire mechanical structure can stably and efficiently operate in various application scenarios.

[0057] Under the action of the pressure applied by the fire-fighting equipment to be applied, the angle between the first supporting rod 42 and the second supporting rod 43 changes, the second supporting rod 43 drives the connecting rod 55, the connecting rod 55 moves and drives the two sliding blocks 52 to slide along the respective slide rails 51, so as to realize the synchronous extension and contraction of the double scissor fork structure, and greatly improve the efficiency and coordination of mechanical operation.

[0058] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , the sliding assembly further comprises a spring support 53 and a spring 54; the spring 53 is arranged in parallel with the slide rail 51; one end of the spring 54 is fixed on the spring support 53, and the other end is connected to the connecting rod 55.

[0059] Preferably, as shown in Figure 3 , the sliding assembly comprises two springs 54, which are arranged in left and right symmetry. The other end of the spring 54 is connected to the connecting rod 55, and the elastic restoring force of the spring can drive the sliding block 52 to reset through the connecting rod 55.

[0060] It should be noted that one end of the spring 54 is fixedly connected to the spring support 53, and the other end is connected to the connecting rod 55. This connection mode enables the spring 54 to exert an elastic force on the connecting rod 55. When the sliding block 52 moves linearly in the sliding groove of the slide rail 51, the spring 54 can utilize its elastic properties to provide buffering, resetting or power assisting functions for the connecting rod 55 and the sliding block 52 connected to the connecting rod 55.

[0061] For example, when the slider 52 slides rapidly due to external impact, the spring 54 can absorb some energy through its own compression or stretching deformation, thus playing a buffering role and preventing the slider 52 from being damaged by excessive impact. When the slider 52 needs to be reset to its initial position, the elastic restoring force of the spring 54 can drive the slider 52 to slide in the opposite direction along the slide rail 51 to achieve automatic reset, thereby driving the telescopic mechanism 3 to retract.

[0062] Preferably, such as Figure 3 As shown, the scissor fork structure in this embodiment is a symmetrical double scissor fork structure, which improves the stability and mechanical performance of the overall gravity-lifted fire hood structure.

[0063] It should be emphasized that the gravity-lifting fire hood in this embodiment is a non-powered mechanical structure. The thermal runaway battery uses its own weight to drive the linkage mechanism and telescopic mechanism 3, thereby lifting the flexible hood 2 to cover the battery and form a sealed water tank to prevent the thermal runaway battery from causing greater damage.

[0064] This embodiment of the invention also provides a fire-fighting device, including: a fire extinguisher and a gravity-lifting fire hood as described above. The equipment to be fire-fighted is placed inside the gravity-lifting fire hood, which is in an unfolded state, forming a partitioned space that meets fire-fighting requirements. The fire extinguisher is then used to fire-fight the equipment within the partitioned space.

[0065] In some examples, the fire extinguisher is a fire-fighting fluid injector. The fire-fighting fluid injector can accurately inject fire-fighting fluid with extinguishing properties into the partitioned space to achieve fire extinguishing and cooling purposes. The fire-fighting fluid injector is a water injection device. When the gravity-lifted fire hood rises to form a sealed water tank, the fire extinguisher injects water into the sealed water tank, which can extinguish or cool the internal thermal runaway battery.

[0066] like Figure 4 As shown, this utility model embodiment also provides a battery swapping station, including: multiple battery swapping compartments and a fire-fighting compartment; a fire-fighting device as described above, the fire-fighting device being installed inside the fire-fighting compartment; a thermal runaway battery being installed on a base, and the partition space formed by the gravity-lifted fire-fighting cover cooperating with the fire-fighting device to extinguish the thermal runaway battery.

[0067] It should be noted that this embodiment upgrades the battery swapping bays or transfer bays in the battery swapping station, specifically by installing fire-fighting equipment on one bay to upgrade it into a fire-fighting bay. Combined with... Figure 5It is explained that the battery robot will hang the thermal runaway battery to the fire warehouse, push the connecting rod mechanism by the weight of the battery, drive the telescopic mechanism (scissors fork mechanism) to move, the top of the scissors fork mechanism is fixed with the waterproof tarpaulin, when the battery falls completely, the tarpaulin will rise to cover the battery completely, and the fire extinguishing device will inject water into the fire warehouse at the same time to prevent the battery from thermal runaway.

[0068] In the embodiment, an additional fire warehouse is not required to be arranged at a position outside the battery replacing station, but a gravity jacking fire cover with a non-powered mechanical structure is arranged on the existing battery replacing position to form the fire warehouse, so that the transportation of the fire equipment is facilitated, the installation is convenient, the floor area can be reduced, and therefore the construction difficulty and manufacturing cost are reduced.

[0069] In summary, the gravity jacking fire cover, the fire extinguishing device and the battery replacing station are provided, the gravity jacking fire cover is used for providing a partition space meeting the fire protection for the fire equipment, and comprises a base, a flexible cover body arranged on the base and in sealing connection with the base at the bottom, an opening arranged at the top of the flexible cover body and used for taking and placing the fire equipment, a telescopic mechanism connected with the base at one end and connected with the top of the flexible cover body at the other end, and a connecting rod mechanism arranged on the base and connected with the telescopic mechanism.

[0070] The gravity jacking fire cover with the non-powered mechanical structure is arranged on the existing battery replacing position to form the fire warehouse, so that the transportation of the fire equipment is facilitated, the installation is convenient, the floor area can be reduced, and therefore the construction difficulty and manufacturing cost are reduced.

[0071] The above embodiment only exemplarily illustrates the principle and effect of the utility model, and is not used for limiting the utility model. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the utility model should be covered by the claims of the utility model.

Claims

1. A gravity-lift fire hood, used to provide fire-fighting-compliant partition space for equipment to be fire-fighted, characterized in that, include: Base; A flexible enclosure is provided on the base, and the bottom of the flexible enclosure is sealed to the base. The top of the flexible enclosure is provided with an opening for the placement and removal of fire-fighting equipment. A telescopic mechanism, one end of which is connected to the base and the other end of which is connected to the top of the flexible cover; A linkage mechanism is mounted on the base and connected to the telescopic mechanism.

2. The gravity-lift fire hood according to claim 1, characterized in that, The linkage mechanism includes a support component and a sliding component; the support component is connected to the sliding component.

3. The gravity-lift fire hood according to claim 2, characterized in that, The support assembly includes a fixed support, a first support rod, and a second support rod; wherein... The fixed support is mounted on the base. One end of the first support rod is rotatably connected to the fixed support. The first support rod is also connected to one end of the second support rod via a pivot. The other end of the second support rod is connected to the sliding assembly.

4. The gravity-lift fire hood according to claim 2, characterized in that, The sliding assembly includes slide rails, connecting rods, and sliders arranged symmetrically on the left and right sides; each slide rail has a groove; each slider is slidably disposed in the groove; and each slider is connected to the other by a connecting rod.

5. The gravity-lift fire hood according to claim 4, characterized in that, The sliding assembly also includes a spring support and a spring; the spring is arranged parallel to the slide rail; one end of the spring is fixed to the spring support, and the other end is connected to the connecting rod.

6. The gravity-lift fire hood according to claim 1, characterized in that, The telescopic mechanism is a scissor fork structure.

7. The gravity-lift fire hood according to claim 6, characterized in that, The scissor fork structure is a multi-stage scissor fork.

8. The gravity-lift fire hood according to claim 1, characterized in that, The flexible cover is a tarpaulin.

9. A fire-fighting device, characterized in that, include: Fire extinguishers; The gravity-lift fire hood as described in any one of claims 1 to 8.

10. A battery swapping station, characterized in that, include: Multiple battery swapping compartments and fire-fighting compartments; The fire-fighting device according to claim 9 is installed inside the fire-fighting chamber; the thermal runaway battery is installed on the base, and the partition space formed by the gravity-lifted fire-fighting cover works in conjunction with the fire-fighting device to extinguish the thermal runaway battery.