Portable lithium battery fire extinguishing device

Abstract

The utility model relates to the technical field of lithium battery fire extinguishing devices, in particular to a portable lithium battery fire extinguishing device which comprises a cart and a fire extinguishing device, a hoop for fixing the fire extinguishing device is mounted on the trolley; the fire extinguishing device is dragged by the cart to move and comprises a fire extinguishing device bottle body, a valve, a spray pipe, a spray rod and a nozzle, the spray rod is of a rigid hollow rod body structure and is communicated with the spray pipe, an ergonomic bend is designed at the tail end of the spray rod to facilitate aiming, an insulating rubber grip is designed on the spray rod, and the electric shock risk of fire extinguishers during lithium battery fire extinguishment is reduced; the spray nozzle sprays out fire extinguishing agents outwards, the spray nozzle is an atomizing spray nozzle, the electric conduction and electric shock risks are effectively reduced, by adopting the technical scheme that the cart and the spray rod are combined, the large-size and large-mass fire extinguisher can be conveniently carried, meanwhile, centralized fire extinguishing treatment can be conducted on a fire source of a lithium battery, waste of the fire extinguishing agents is avoided, and the fire extinguishing efficiency is improved. Meanwhile, the spraying time of the fire extinguishing agent on lithium battery fire extinguishing is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery fire extinguishing devices, and in particular to a portable lithium battery fire extinguishing device. Background Technology

[0002] Lithium-ion batteries are widely used due to their high energy density, but their thermal runaway risk is also a major concern. Lithium-ion battery fires are characterized by intense combustion, high temperatures, a high risk of reignition, and the potential release of toxic gases. Common fire extinguishing devices, such as traditional fire extinguishers (which come in three main types: dry powder, water-based foam, and gaseous extinguishers), are all ineffective in controlling lithium-ion battery thermal runaway, leading to repeated reignitions and difficulty in stopping the runaway. Increasing the dosage to prolong the spray suppression time has been considered, but this option is too heavy to lift and move.

[0003] In addition, the lithium battery pack casing has a high level of waterproof and dustproof protection, which normally prevents the fire extinguishing agent from being sprayed into the interior. When thermal runaway explosion and jet flame occur, the casing deforms and cracks, creating a rupture. However, conventional fire extinguisher nozzles cannot get close enough to spray, and the spray spreads over a large area, making it impossible to get close to the rupture and reduce agent waste before the agent spreads and directly enters the interior through the rupture to contact the lithium battery cells. Furthermore, the spraying time is too short, and most of the fire extinguishing agent is wasted and lost, failing to reach the battery cells.

[0004] For example, the utility model patent with patent application number 202121216844.1 discloses a direct-mount wheeled fire extinguisher, which belongs to the field of fire extinguishers. This patent proposes to use a wheeled vehicle in conjunction with the fire extinguisher to solve the problem that fire extinguishers are large, heavy and inconvenient to transport.

[0005] For example, utility model patent application number 201720622524.3 discloses a Class D portable fire extinguisher with a horn nozzle, including a fire extinguisher cylinder, pressure gauge, handle, valve body, nozzle, quick connector, extension rod, horn nozzle and handle. This patent proposes to add an extension rod to prevent firefighters from getting too close to the fire source, and the nozzle baffle at the nozzle changes the direction of the extinguishing agent spray, which is strongly reflected back to the fire source, so that the sprayed extinguishing agent can cover the fire source and reduce the waste of extinguishing agent.

[0006] However, there is currently no fire extinguishing device on the market that can solve both the technical problem of transporting large-volume fire extinguishers and the problem of reducing the waste of fire extinguishing agents by spraying them close to the fire source. Utility Model Content

[0007] To address the above problems, this utility model provides a portable lithium battery fire extinguishing device. By adopting a technical solution that combines a trolley and a spray boom, the trolley makes it easy to transport the large-volume, heavy fire extinguisher, while the spray boom can be used to concentrate the fire extinguishing treatment on the burst of flame at the fire source of the lithium battery, avoiding the waste of fire extinguishing agents and extending the spraying time of the fire extinguishing agents on the lithium battery.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A portable lithium battery fire extinguishing device, comprising:

[0010] Wheeled vehicle and fire extinguishing equipment;

[0011] The trolley is equipped with a clamp for supporting the fire extinguishing device;

[0012] The fire extinguishing device is moved by the trolley. The fire extinguishing device includes a fire extinguishing device bottle, a valve, a spray pipe, a spray bar, and a nozzle. The fire extinguishing device bottle is filled with fire extinguishing agent. The valve is installed at the top opening of the fire extinguishing device bottle. The spray pipe is a flexible tube structure and is connected to the valve. The spray bar is a rigid hollow rod structure and is connected to the spray pipe. The nozzle is installed at the end of the spray bar and sprays fire extinguishing agent outward.

[0013] The sleeve includes upper and lower parallel rings, the diameter of which is adapted to the diameter of the fire extinguishing device cylinder, and the rings are fitted onto the trolley via a ring. The rings are integrally connected to each other by a connecting plate.

[0014] As an improvement, the sleeve includes upper and lower parallel rings with a diameter that matches the diameter of the fire extinguishing device cylinder. The rings are fitted onto the trolley via a circular ring, and the rings are integrally connected to each other via a connecting plate.

[0015] As an improvement, the fire extinguishing device cylinder is equipped with a clamp for limiting and securing the spray bar.

[0016] As an improvement, the valve is provided with a pin for controlling the opening of the valve, and the pin is suspended from the valve by a connecting cable.

[0017] As an improvement, the valve is provided with an inflation and pressurization nozzle, which fills the fire extinguishing device cylinder with gas.

[0018] The valve is equipped with a safety valve, and a pressure gauge is installed on the opposite side of the safety valve. The pressure gauge displays the gas pressure inside the fire extinguishing device cylinder.

[0019] As an improvement, the end of the spray bar used for mounting the nozzle is bent, and an insulating rubber handle is provided at the connection point between the spray bar and the spray pipe.

[0020] As an improvement, the nozzle is configured in a trumpet shape, and the spray area is formed from the nozzle orifice to the trumpet-shaped edge of the nozzle.

[0021] As an improvement, the nozzle is cone-shaped, and the front end of the nozzle is provided with a cross-shaped prismatic tip, which is a metal impact tip.

[0022] As an improvement, the trolley includes a base and a push handle;

[0023] The base includes a bottom bracket, a connecting sleeve, and rollers. The bottom bracket is horizontally positioned and extends upward to form the connecting sleeve. The rollers are symmetrically installed on both sides of the bottom bracket.

[0024] The push handle is n-shaped and is inserted into the connecting sleeve.

[0025] As an improvement, a plurality of equidistant positioning holes are provided on the wall of any of the connecting sleeves along its axial direction, and a spring protrusion is provided on the push handle to cooperate with the positioning holes. The spring protrusion is inserted into the positioning holes to position and connect the push handle and the connecting sleeve.

[0026] The beneficial effects of this utility model are as follows:

[0027] (1) This utility model combines a trolley and a spray bar, which greatly improves the volume and weight of the fire extinguishing device and increases the dosage of the fire extinguishing agent. At the same time, the matching trolley is designed to facilitate quick movement and can still be easily transported and operated by firefighters. The trolley can support the fire extinguishing device to prevent it from falling or tipping over. However, in an emergency, it is necessary to be able to lift the fire extinguishing device at any time, detach it from the trolley, and start the fire extinguishing. Furthermore, the setting of the spray bar can keep firefighters away from the lithium battery to avoid the danger to the operator caused by the explosion. At the same time, it can also concentrate the fire extinguishing treatment on the lithium battery fire.

[0028] (2) The spray bar of this utility model is equipped with an insulating rubber handle near the nozzle to prevent electric shock. The spray bar is slightly bent near the end of the nozzle to facilitate spraying and aiming. The spray bar provides a safe distance for firefighters. With the slight bend, the personnel can spray to the side to avoid the spraying flames.

[0029] (3) This utility model enables the fire extinguishing agent to be filled and pressurized automatically after the fire extinguishing device is used up by the agent replenishment valve and the air filling and pressurizing nozzle, avoiding the tedious process of returning to the factory for filling. The fire extinguishing agent is a high-efficiency and environmentally friendly RTDS-Lith lithium battery special fire extinguishing agent, which can be effectively applied to various Class A fires that are most common in life. It can be pressurized by a simple manual air pump or air pumping device commonly used in daily life, and has strong adaptability.

[0030] (4) This utility model is compatible with two types of nozzles. One type is a horn-shaped nozzle, which is used for fires where the lithium battery sprays flames outward. The nozzle has a spray hole to limit the flow rate. The horn shape of the nozzle is conducive to covering the rupture opening and shrinking the extinguishing agent when it approaches the rupture opening, so that the extinguishing agent is concentrated and sprayed into the rupture opening, reducing waste and improving the heat absorption and cooling efficiency. The other type is a cross-shaped prismatic metal impact tip nozzle, which is used for fires inside the lithium battery. The nozzle end is designed with a cross-shaped prismatic metal impact tip. Combined with the lever principle of the spray bar, the impact of gravity acceleration is conducive to opening the rupture opening, so that the fire extinguisher device can penetrate the rupture opening of the lithium battery shell and spray the extinguishing agent into the lithium battery for fire extinguishing. It can be applied to different fire scenes and has a higher fire extinguishing efficiency.

[0031] In summary, this utility model has the advantages of long fire extinguishing time, convenient and quick operation, and wide applicability in various fire situations, and is especially suitable for the field of lithium battery fire extinguishing technology. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the three-dimensional structure of the fire extinguishing device in Embodiment 1 of this utility model. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the three-dimensional structure of the cart in Embodiment 1 of this utility model. Figure 1 ;

[0034] Figure 3 This is a schematic diagram of the three-dimensional structure of the fire extinguishing device in Embodiment 1 of this utility model. Figure 2 ;

[0035] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0036] Figure 5 This is a schematic diagram of the three-dimensional structure of the fire extinguishing device in Embodiment 2 of this utility model. Figure 3 ;

[0037] Figure 6 This is a schematic diagram of the three-dimensional structure of the clamp in Embodiment 2 of this utility model;

[0038] Figure 7 for Figure 5 Enlarged schematic diagram of the structure at point B;

[0039] Figure 8 This is a three-dimensional structural diagram of the nozzle in Embodiment 4 of this utility model;

[0040] Figure 9 This is a schematic diagram of the three-dimensional structure of the trolley in Embodiment 5 of this utility model. Figure 2 ;

[0041] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point C.

[0042] The attached diagram includes the following labels: trolley 1, clamp 11, collar 111, load-bearing crossbar 1111, connecting plate 112, ring 113, base 12, bottom bracket 121, roller 122, connecting sleeve 123, positioning hole 1231, push handle 13, spring protrusion 131, fire extinguishing device 2, fire extinguishing device cylinder 21, clamp 213, collar 2131, buckle 2132, valve 22, pin 221, connecting cable 222, inflation nozzle 223, pressure gauge 224, safety valve 225, nozzle 23, spray boom 24, insulated rubber grip 241, nozzle 25, spray zone 250, spray hole 251, and cross-shaped prismatic tip 253. Detailed Implementation

[0043] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0044] The specific embodiments of this utility model will be described in detail below. However, it should be noted that the scope of protection of this utility model is not limited to these specific embodiments, but is determined by the claims in the appendix.

[0045] All publications, patent applications, patents, and other references mentioned in this specification are incorporated herein by reference. Unless otherwise defined, all technical and scientific terms used in this specification have the meanings commonly understood by those skilled in the art. In case of conflict, the definitions in this specification shall prevail.

[0046] When this specification uses the prefixes "known to those skilled in the art," "prior art," or similar terms to derive materials, substances, methods, steps, apparatus, or components, the objects derived from such prefixes cover those conventionally used in the art at the time this utility model was proposed, but also include those that are not currently commonly used, but will become generally recognized in the art as suitable for similar purposes.

[0047] It should be noted that the two or more aspects (or embodiments) disclosed in the context of this specification can be arbitrarily combined with each other, and the resulting technical solutions (such as methods or systems) are part of the original disclosure of this specification and also fall within the protection scope of this utility model.

[0048] Unless otherwise specified, all percentages, parts, ratios, etc. mentioned in this specification are based on weight, unless being based on weight would not be in accordance with the common understanding of those skilled in the art.

[0049] Example 1:

[0050] like Figures 1-4 As shown, a portable lithium battery fire extinguishing device includes:

[0051] Cart 1 and fire extinguishing device 2;

[0052] The trolley 1 is equipped with a clamp 11 for supporting the fire extinguishing device 2;

[0053] The fire extinguishing device 2 is moved by the trolley 1. The fire extinguishing device 2 includes a fire extinguishing device bottle 21, a valve 22, a nozzle 23, a spray bar 24, and a nozzle 25. The fire extinguishing device bottle 21 is filled with fire extinguishing agent. The valve 22 is installed at the top opening of the fire extinguishing device bottle 21. The nozzle 23 is a flexible tube structure and is connected to the valve 22. The spray bar 24 is a rigid hollow rod structure and is connected to the nozzle 23. The nozzle 25 is installed at the end of the spray bar 24 and sprays fire extinguishing agent outward.

[0054] Specifically, the sleeve 11 includes upper and lower sleeves 111. The diameter of the sleeves 111 is adapted to the diameter of the fire extinguishing device cylinder 21. The sleeves 111 are fitted onto the trolley 1 via rings 113. The sleeves 111 are connected to each other by connecting plates 112 to form a whole, which enhances the strength of the sleeves 111. The bottom sleeve 111 is provided with a cross-shaped support crossbar 1111. The bottom of the fire extinguishing device cylinder 21 is placed on the support crossbar 1111 and supported by it. At the same time, the fire extinguishing device cylinder 21 can be quickly and smoothly removed from the sleeve 11, so that the fire extinguishing device 2 can be carried by firefighters for fire extinguishing.

[0055] In addition, the valve 22 is provided with a pin 221 for controlling the opening of the valve 22. The pin 221 is suspended from the valve 22 by a connecting cable 222. The valve 22 is also provided with an inflation nozzle 223 for filling gas into the fire extinguishing device cylinder 21. The valve 22 is also provided with a safety valve 225. On the opposite side of the safety valve 225, a pressure gauge 224 is provided to display the gas pressure inside the fire extinguishing device cylinder 21.

[0056] It should be noted that the fire extinguishing device of this utility model adopts a recyclable structure. That is, after the fire extinguishing agent in the fire extinguishing device cylinder 21 has been completely sprayed, the top opening of the fire extinguishing device cylinder 21 can be opened by disassembling the valve 22, and the fire extinguishing agent can be refilled into the fire extinguishing device cylinder 21, so that the fire extinguishing device 2 can be reused. It should be emphasized that the fire extinguishing agent occupies two-thirds to three-quarters of the space inside the fire extinguishing device cylinder 21, and the rest is pressurized gas. After the fire extinguishing agent is filled into the fire extinguishing device cylinder 21, the remaining space at the top of the fire extinguishing device cylinder 21 is used to fill in gas to pressurize the fire extinguishing agent, so that the fire extinguishing agent can be pressurized and sprayed outward.

[0057] To further clarify, before the pressurization process, valve 22 needs to be reinstalled onto the fire extinguishing device cylinder 21. Then, a conventional air pump is used to connect to the inflation nozzle 223 on valve 22. Air is then injected into the fire extinguishing device cylinder 21 using the air pump. It should be emphasized that the structure of the inflation nozzle 223 is similar to that of a tire valve core, and it is a one-way valve structure. Any device used for tire inflation can be used for pressurizing the fire extinguishing device cylinder 21 of this utility model. After pressurization, pressure gauge 224 will display the pressure value, ensuring that the pressure inside the fire extinguishing device cylinder 21 meets the standard.

[0058] In addition, when using the fire extinguishing device, the pin 221 on the valve 22 needs to be pulled out. After being pulled out, the valve 22 is in the open state, and the operator can control the fire extinguishing device to spray the fire extinguishing agent. The pin 221 is suspended on the valve 22 by the connecting cable 222. After use, the pin 221 is put back in, which will make the valve 22 in the closed state.

[0059] Example 2:

[0060] Referring to Example 1, the difference between Example 2 and Example 1 lies in the following:

[0061] like Figures 5-6 As shown, the fire extinguishing device cylinder 21 is equipped with a clamp 213 for limiting and locking the spray bar 24.

[0062] The spray bar 24 is arranged in a zigzag shape, and an insulating rubber handle 241 is provided at the connection position between the spray bar 24 and the spray pipe 23.

[0063] It should be noted that when the fire extinguishing device is not in operation, the spray boom 24 needs to be stored due to its length. This utility model provides two sets of clamps 213 on the fire extinguishing device cylinder 21 to limit and fix the spray boom 24. It is worth noting that both sets of clamps 213 include a collar 2131 and a buckle 2132 extending outward from the collar 2131. The buckle 2132 is hook-shaped and elastically tensioned. When the spray boom 24 is engaged in the buckle 2132, the buckle 2132 opens elastically to lock the boom. Furthermore, the buckles 2132 of the two sets of clamps 213 are arranged with opposite openings, which facilitates the quick removal of the spray boom 24.

[0064] Example 3:

[0065] Referring to Examples 1-2, the difference between Example 3 and Examples 1-2 is as follows:

[0066] like Figure 7 As shown, the nozzle 25 is arranged in a trumpet shape, and the spray area 250 is formed from the spray hole 251 of the nozzle 25 to the trumpet-shaped edge of the nozzle 25.

[0067] The horn-shaped nozzle 25 is designed for fires that have spread beyond the lithium battery, meaning the flames are clearly visible to the naked eye on the outside of the lithium battery. In this case, the nozzle 25 is moved to the side of the flames by using the spray bar to avoid spraying the flames, and then the nozzle 25 is aimed at the flames (i.e., the crack in the lithium battery pack casing) to spray, achieving a concentrated fire extinguishing effect. The wide angle of the agent spray from the nozzle 25 can be adjusted by rotating the nozzle 25, so that the flame nozzle opening / crack is covered by the fire extinguishing agent sprayed from the nozzle 25. As the fire extinguishing agent is sprayed, the flames gradually become smaller and are eventually covered by the nozzle 25. The fire source then enters the lithium battery pack through the spray area 250, which covers the crack.

[0068] Example 4:

[0069] Referring to Example 3, the difference between Example 4 and Example 3 is as follows:

[0070] like Figure 8 As shown, the nozzle 25 is conical in shape, and the front end of the nozzle 25 is provided with a cross-shaped prismatic tip 253.

[0071] It should be noted that the nozzle 25 in Example 4 is designed to handle a different fire situation than that in Example 3. Specifically, the nozzle 25 in Example 4 is designed to handle a fire where the lithium battery is burning inside. In other words, there is no flame on the outside of the lithium battery, but smoke is continuously billowing out from inside the lithium battery. In this case, the outer casing of the lithium battery can be punctured by the cross-shaped prism tip 253 of the nozzle 25, allowing the nozzle 25 to penetrate into the lithium battery. Then, the fire extinguishing agent is sprayed into the lithium battery to continuously extinguish the fire inside the lithium battery.

[0072] Furthermore, it should be emphasized that the present invention does not exclude the nozzle 25 that combines Embodiment 3 and Embodiment 4, that is, a protruding prismatic tip is provided at the end of the nozzle 25 of Embodiment 3.

[0073] Example 5:

[0074] Referring to Example 1, the difference between Example 5 and Example 1 of this utility model is as follows:

[0075] like Figures 9-10 As shown, the trolley 1 includes a base 12 and a push handle 13;

[0076] The base 12 includes a bottom support 121, a connecting sleeve 123 and rollers 122. The bottom support 121 is horizontally arranged and extends upward to form the connecting sleeve 123. The rollers 122 are symmetrically installed on both sides of the bottom support 121.

[0077] The push handle 13 is arranged in an n-shape and is inserted into the connecting sleeve 123.

[0078] Furthermore, each of the connecting sleeves 123 has a plurality of equidistant positioning holes 1231 on its cylindrical wall along its axial direction, and the push handle 13 has a spring protrusion 131 that corresponds to and cooperates with the positioning holes 1231. The structure of the spring protrusion 131 is similar to that of the ball screw. The spring protrusion 131 and the positioning holes 1231 are interlocked and cooperate to position and connect the push handle 13 and the connecting sleeve 123.

[0079] It should be noted that the structure of the trolley 1 is similar to that of the existing trolley structure. The difference is that the trolley 1 of this utility model adopts a trolley structure with the base 12 and the push handle 13 set separately. When the trolley 1 is parked, the base 12 and the two sets of rollers 122 cooperate to support the trolley and prevent the trolley from tipping over.

[0080] To further explain, when the push handle 13 is engaged with the base 12, the push handle 13 engages with the positioning hole 1231 through the spring protrusion 131, thereby limiting the engagement between the push handle 13 and the connecting sleeve 123. Furthermore, multiple sets of positioning holes 1231 are provided, which allows for adjustment of the height between the push handle 13 and the base 12, thereby adjusting the overall height of the trolley 1.

[0081] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable lithium battery fire extinguishing device, characterized in that, include: A trolley (1) and a fire extinguishing device (2); The trolley (1) is equipped with a clamp (11) for supporting the fire extinguishing device (2). The fire extinguishing device (2) is moved by the trolley (1). The fire extinguishing device (2) includes a fire extinguishing device bottle (21), a valve (22), a nozzle (23), a spray bar (24), and a nozzle (25). The fire extinguishing device bottle (21) is filled with fire extinguishing agent. The valve (22) is installed at the top opening of the fire extinguishing device bottle (21). The nozzle (23) is a flexible tube structure and is connected to the valve (22). The spray bar (24) is a rigid hollow rod structure and is connected to the nozzle (23). The nozzle (25) is installed at the end of the spray bar (24) and sprays fire extinguishing agent outward. The sleeve (11) includes upper and lower parallel sleeves (111), the diameter of which is adapted to the diameter of the fire extinguishing device bottle (21), and the sleeve (111) is sleeved on the trolley (1) through a ring (113), and the sleeves (111) are integrally connected through a connecting plate (112).

2. The portable lithium battery fire extinguishing device according to claim 1, characterized in that: The sleeve (11) includes upper and lower parallel sleeves (111), the diameter of which is adapted to the diameter of the fire extinguishing device bottle (21), and the sleeve (111) is sleeved on the trolley (1) through a ring (113), and the sleeves (111) are integrally connected through a connecting plate (112).

3. The portable lithium battery fire extinguishing device according to claim 1, characterized in that: The fire extinguishing device cylinder (21) is equipped with a clamp (213) for limiting and locking the spray bar (24).

4. A portable lithium battery fire extinguishing device according to claim 1, characterized in that: The valve (22) is provided with a pin (221) for controlling the opening of the valve (22), and the pin (221) is suspended on the valve (22) by a connecting cable (222).

5. A portable lithium battery fire extinguishing device according to claim 1, characterized in that: The valve (22) is provided with an inflation nozzle (223), which fills the fire extinguishing device bottle (21) with gas. A safety valve (225) is provided on the valve (22), and a pressure gauge (224) is provided on the opposite side of the safety valve (225). The pressure gauge (224) displays the air pressure inside the fire extinguishing device cylinder (21).

6. A portable lithium battery fire extinguishing device according to claim 1, characterized in that: The end of the spray bar (24) for mounting the nozzle (25) is bent, and an insulating rubber handle (241) is provided at the connection position between the spray bar (24) and the spray pipe (23).

7. A portable lithium battery fire extinguishing device according to claim 1, characterized in that: The nozzle (25) is arranged in a trumpet shape, and the spray area (250) is formed from the spray hole (251) of the nozzle (25) to the trumpet-shaped edge of the nozzle (25).

8. A portable lithium battery fire extinguishing device according to claim 1, characterized in that: The nozzle (25) is conical in shape, and the front end of the nozzle (25) is provided with a cross-shaped prismatic tip (253).

9. A portable lithium battery fire extinguishing device according to claim 1, characterized in that: The trolley (1) includes a base (12) and a push handle (13); The base (12) includes a bottom bracket (121), a connecting sleeve (123) and rollers (122). The bottom bracket (121) is horizontally arranged and extends upward to form the connecting sleeve (123). The rollers (122) are symmetrically installed on both sides of the bottom bracket (121). The push handle (13) is arranged in an n-shape and is inserted into the connecting sleeve (123).

10. A portable lithium battery fire extinguishing device according to claim 9, characterized in that: The sleeve (123) of any one of the connecting sleeves (123) has a plurality of equidistant positioning holes (1231) on its axial direction. The push handle (13) has a spring protrusion (131) that corresponds to and cooperates with the positioning hole (1231). The spring protrusion (131) and the positioning hole (1231) are inserted and cooperated to position and connect the push handle (13) and the connecting sleeve (123).

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