Fire blanket device for electric vehicle charging station and method of use thereof

Abstract

The application discloses a fire extinguishing blanket device for an electric vehicle charging station, which comprises a fireproof cloth body and a plurality of energy storage bags, the energy storage bags are arranged in the fireproof cloth body and are spaced from each other, so that the fireproof cloth body forms a plurality of spaced bulge parts, and the fireproof body is provided with openings communicated with the energy storage bags, and the energy storage bags are provided with combustible layers. The application adds a plurality of energy storage bags in the fire extinguishing blanket, the energy storage bags are provided with combustible structures inside, can generate combustion reaction under high temperature of open fire or heat source, and the essence is to accelerate consumption of oxygen around the fire extinguishing blanket, inhibit mixing of oxygen and combustible gas generated by thermal runaway of the battery, and play a fire extinguishing and blocking role, and the application is suitable for the scene of the electric vehicle charging station with rapidly developed fire.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle fire spread prevention technology, specifically to a fire blanket device for electric vehicle charging stations and its usage method. Background Technology

[0002] Regarding the issue of thermal runaway fires in electric vehicle charging stations, during a power battery thermal runaway fire, not only are large amounts of toxic and harmful gases released, but also flammable gases such as carbon monoxide, hydrogen, and hydrocarbons, which intensify the fire and render conventional fire extinguishing and containment methods ineffective.

[0003] Conventional fire blankets are woven from specially treated materials such as fiberglass, serving to isolate heat sources and oxygen. Battery thermal runaway occurs extremely rapidly; within a short time, a large amount of white smoke (such as flammable gases like carbon monoxide and hydrogen) accumulates during thermal runaway, and the process from the appearance of white smoke to ignition takes only about one minute. Conventional fire blankets have a limited time-limited effectiveness in preventing the mixing of oxygen with flammable gases generated during battery thermal runaway. Therefore, they cannot completely suppress the mixing of runaway gases with oxygen to produce open flames or explosions, thus intensifying the fire caused by the thermal runaway of the electric vehicle.

[0004] For example, patent document CN218871113U, entitled "A Fire Blanket for Firefighting," specifically discloses that "the fire blanket includes a fire blanket body, with triangular reinforcing pads at each of the four corners, pull ropes fixedly connected to each of the four corners, and the outer surface of the fire blanket body coated with fire-retardant adhesive; the fire blanket body is provided with a first fireproof layer, a second fireproof layer, a heat insulation layer, and a smoke filter layer from bottom to top, and a steel wire layer is fixedly connected between the second fireproof layer and the heat insulation layer." This type of fire blanket extinguishes fires by directly covering the fire source. However, this method of extinguishing fires requires a certain amount of time. Due to battery thermal runaway and the fierce fire, the above-mentioned method of extinguishing fires cannot completely suppress the mixing of thermal runaway gas generated by the power battery with oxygen to produce open flames or explosions, and the extinguishing efficiency is low. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to solve the problem of fires at electric vehicle charging stations being fierce and difficult to extinguish and contain quickly.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A fire blanket device for electric vehicle charging stations includes a fireproof cloth body and several energy storage bags. The energy storage bags are respectively disposed inside the fireproof cloth body and spaced apart from each other, so that the fireproof cloth body forms several spaced bulges. An opening communicating with the energy storage bags is opened on the fireproof cloth body. A combustible layer is disposed inside the energy storage bags.

[0008] This application adds multiple energy storage packs to the fire blanket. The energy storage packs are equipped with combustible structures inside, which can undergo a combustion reaction under the high temperature of open flame or heat source. Essentially, it accelerates the consumption of oxygen around the fire blanket and inhibits the mixing of oxygen with combustible gases generated by battery thermal runaway, thereby playing a fire extinguishing role. It is suitable for scenarios such as electric vehicle charging stations where fires develop rapidly.

[0009] As a further aspect of the present invention: a hollow tube is installed at the middle position of the energy storage pack along the thickness direction, the bottom of the hollow tube penetrates the energy storage pack and communicates with the opening on the fireproof cloth body; a diaphragm sleeve is installed inside the hollow tube, and a temperature-touch block is provided on the side of the diaphragm sleeve facing the opening of the fireproof cloth body.

[0010] As a further aspect of the present invention, the melting point of the contact point block is in the range of 50℃-115℃.

[0011] As a further aspect of the present invention: the top of the hollow pipe is connected to the upper wall of the energy storage tank, and a fire vent is provided at a position slightly above the hollow pipe, with the outlet of the fire vent located inside the energy storage tank.

[0012] As a further aspect of the present invention: at the middle position of the energy storage pack, along the thickness direction and outside the hollow tube, a number of side tubes are provided, the inside of the side tubes is also provided with a diaphragm sleeve, and a temperature-touch block is provided below the diaphragm sleeve; the bottom of the side tubes is connected to the opening on the fireproof cloth body, and the top is connected to the upper wall of the energy storage pack.

[0013] As a further aspect of the present invention: the energy storage pack is provided with a combustible layer, a flame-retardant layer, a bottom material layer and two fire-resistant empty layers inside. The combustible layer is located between the two fire-resistant empty layers, the flame-retardant layer is located below the lower fire-resistant empty layer, the bottom material layer is located below the flame-retardant layer, and a diaphragm is provided between adjacent layers.

[0014] As a further aspect of the present invention, the combustible layer is filled with a combustible agent.

[0015] As a further aspect of the present invention: the interior of the flame-retardant layer is filled with a flame-retardant material.

[0016] As a further aspect of the present invention: the fireproof cloth body has a double-layer structure, and the energy storage pack is located in the middle of the double-layer protective cloth body.

[0017] The present invention also discloses a method for using a fire blanket device for electric vehicle charging stations, comprising the following steps:

[0018] Use the side of the fireproof cloth with an opening as the working surface, and lay the working surface directly over the fire source.

[0019] The combustible layer inside the energy storage pack reacts with a heat source or open flame and then burns.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This application adds multiple energy storage packs to the fire blanket. The energy storage packs are equipped with combustible structures inside, which can undergo a combustion reaction under the high temperature of open flame or heat source. Essentially, it accelerates the consumption of oxygen around the fire blanket and inhibits the mixing of oxygen with combustible gases generated by battery thermal runaway, thereby playing a fire extinguishing role. It is suitable for scenarios where fires develop rapidly, such as electric vehicle charging stations. It can consume the oxygen under the working surface of the fire blanket in a short time, reduce the mixing of oxygen with thermal runaway gases, inhibit the occurrence of open flame or explosion, and weaken the thermal radiation impact on surrounding unburned vehicles.

[0022] 2. In the process of melting the contact point block, this application prioritizes the release of the diaphragm sleeve inside the hollow tube, and actively releases the filler inside under high temperature or open flame conditions; the diaphragm sleeve and the flame-retardant material in the flame-retardant layer can cover the fire area, and in conjunction with the energy storage pack's "active oxygen consumption" method, it can suppress the mixing of oxygen around the fire blanket with the thermal runaway gas of the electric vehicle power battery, thus achieving a better fire extinguishing effect.

[0023] 3. This application sets up two fire-receiving voids, which are placed on the upper and lower sides of the combustible layer respectively. The open flame "rushes" into the two fire-receiving voids from the vent and contacts the combustible layer from the upper and lower sides, increasing the contact area between the combustible layer and the open flame and improving the combustion efficiency of the combustible layer. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a fire blanket device for an electric vehicle charging station according to an embodiment of the present invention;

[0025] Figure 2 This is a split view of the bulge section inside the fire blanket device for electric vehicle charging stations according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the energy storage pack inside the fire blanket device for electric vehicle charging stations according to an embodiment of the present invention;

[0027] Figure 4 This is a cross-sectional view of the energy storage pack inside the fire blanket device for electric vehicle charging stations according to an embodiment of the present invention;

[0028] Figure 5 This is a cross-sectional view of the energy storage pack inside the fire blanket device for electric vehicle charging stations according to an embodiment of the present invention;

[0029] Figure 6 This is a cross-sectional view of the hollow tube inside the fire blanket device for electric vehicle charging stations according to an embodiment of the present invention;

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Fireproof cloth body; 2. Bulged section; 3. Energy storage bag; 4. Side passage pipe; 5. Hollow passage pipe; 6. Temperature contact point block; 7. Diaphragm sheet; 8. Combustible layer; 9. Flame-retardant layer; 10. Base layer; 11. Fire-receiving void; 12. Fire vent; 13. Diaphragm sleeve. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] To address the potential battery thermal runaway fires in charging stations, conventional fire blankets rely solely on the high-temperature resistance, flame retardancy, and oxygen-blocking properties of special materials to "block" oxygen and extinguish the fire. However, in electric vehicle charging stations, the rapid rate of battery thermal runaway and the resulting flammable gases, when mixed with oxygen, create an unfavorable combustion-enhancing effect. This makes conventional fire blankets insufficient to fully meet the fire extinguishing requirements for battery thermal runaway. Therefore, the following technical solution is proposed.

[0034] Reference Figure 1 and Figure 2 A fire blanket device for electric vehicle charging stations includes a fireproof cloth body 1, bulges 2, and energy storage bags 3. Several energy storage bags 3 are provided, and each energy storage bag 3 is placed inside the fireproof cloth body 1 with intervals between each other, so that the fireproof cloth body 1 forms several spaced bulges 2. It should be noted that the number of bulges 2 and energy storage bags 3 is the same, determined according to the actual size of the fireproof cloth body 1. At the same time, the distance between two adjacent bulges 2 and two adjacent energy storage bags 3 is also determined according to the actual size of the fireproof cloth body 1, and this application does not impose any limitations on this.

[0035] It should be noted that the number of energy storage packs 3 corresponds to the number of bulges 2 and is determined according to the actual size of the fireproof cloth body 1; and the fireproof cloth body 1 of this application is woven entirely with fireproof material, the specific fireproof material being common knowledge in the field, and this application does not limit it.

[0036] Reference Figure 1 The fireproof cloth body 1 is rectangular in shape, but it can also be designed as a circle or other shapes, depending on the actual needs of the site. This application does not limit it, but only provides one possible implementation method. The fireproof cloth body 1 has a double-layer structure, with both the upper and lower layers made of fire-resistant materials. An opening corresponding to the energy storage bag 3 is provided on the working surface of the fireproof cloth body 1.

[0037] Reference Figure 1 The bulge 2 has a rectangular structure, and there is a gap between two adjacent bulges 2. The size of the gap depends on the actual needs and is not limited in this application. The bulge 2 can also be designed as a circle or other shapes. At the same time, several bulges 2 can also be arranged in a circular array, depending on the actual needs.

[0038] Reference Figure 2 The energy storage pack 3 is located between the upper and lower layers of the fireproof cloth body 1. The cross-section of the energy storage pack 3 is a horizontal elliptical structure with bulges at both ends. Several diaphragms 7 are installed horizontally along the thickness direction inside the energy storage pack 3. A hollow tube 5 is installed vertically in the middle of the energy storage pack 3. Multiple side tubes 4 are installed in a ring array on the outside of the hollow tube 5. The number of side tubes 4 depends on the actual situation. The energy storage pack 3 is provided with a fire-resistant hollow layer 11, a combustible layer 8, a flame-retardant layer 9 and a bottom material layer 10. Diaphragms 7 are set between adjacent layers. One end of the hollow tube 5 and the side tube 4 penetrates one side of the energy storage pack 3. The curved surface of one end of the hollow tube 5 and the side tube 4 is at the same curvature as one side surface of the fireproof cloth body 1. The hollow tube 5 and the side tube 4 are hollow inside.

[0039] Reference Figure 4 and Figure 5 The side-mounted pipe 4 and the hollow pipe 5 have the same shape, both being hollow cylindrical structures. The bottom of the side-mounted pipe 4 and the hollow pipe 5 are open, and a fire vent 12 is provided on one side of the top. The fire vent 12 is located at the fire-receiving empty layer 11 of the energy storage pack 3. The bottom of the hollow pipe 5 penetrates through the bottom of the energy storage pack 3 and communicates with the opening on the fireproof cloth body 1. The top of the hollow pipe 5 is connected to the top of the energy storage pack 3.

[0040] Furthermore, refer to Figure 6 A diaphragm sleeve 13 is installed inside the hollow tube 5. The temperature contact block 6 is installed on the side of the diaphragm sleeve 13 facing the connection between the energy storage bag 3 and the fireproof cloth body 1, and the melting point temperature range of the temperature contact block 6 is 50℃-115℃.

[0041] It should be noted that the side-channel pipe 4 is also equipped with a diaphragm sleeve inside, and a temperature-contacting block is set below the diaphragm sleeve; the bottom of the side-channel pipe 4 is connected to the opening on the fireproof cloth body 1, and the top is connected to the upper wall of the energy storage bag 3. The upper ends of the hollow pipe 5 and the side-channel pipe 4 are fixedly connected to the top of the inner wall of the energy storage bag 3. The center point of the hollow pipe 5 and the center point of the energy storage bag 3 are on the same vertical axis.

[0042] Reference Figure 4 and Figure 5The side of the fireproof cloth body 1 connected to the hollow tube 5 is set as the working surface, and the other side of the fireproof cloth body 1 is set as the non-working surface; the combustible layer 8, the flame-retardant layer 9 and the bottom material layer 10 are arranged from top to bottom along the non-working surface; and the fire-receiving hollow layer 11 has a double-layer structure, with the combustible layer 8 located in the middle of the two fire-receiving hollow layers 11.

[0043] Reference Figure 4 and Figure 5 The fire-receiving hollow layer 11 has a double-layer structure. The combustible layer 8 is located in the middle of the two fire-receiving hollow layers 11. The combustible layer 8, the flame-retardant layer 9, the bottom material layer 10, and the filling diaphragm sleeve 13 are respectively filled with combustible agent, flame-retardant material one, bottom material, and flame-retardant material two.

[0044] Basic principle: The key structure of this application is the energy storage pack 3. The energy storage pack 3 does not participate in the function of blocking oxygen, but actively burns to accelerate the consumption of oxygen. Its essence is to accelerate the consumption of oxygen around the fire blanket, inhibit the mixing of oxygen with the combustible gas generated by the thermal runaway of the battery, and thus play a role in extinguishing the fire. It should also be noted that the open flame or high temperature smoke generated by the combustion process inside the energy storage pack 3 is mainly concentrated inside it and will not burn onto the fireproof cloth body 1, thus not increasing the workload of the fireproof cloth body 1.

[0045] A fire blanket is essentially a piece of woven fabric, and in this embodiment, it is mainly used to integrate the overall invention's preparation process, which includes the following components:

[0046] 1. After laying out a single layer of woven fireproof cloth body 1, place multiple energy storage bags 3 in sequence, then cover each energy storage bag 3 with another layer of woven fireproof cloth body 1. Finally, press the two layers of fireproof cloth body 1 together by pressing / sewing, etc., so that compared with the conventional fire blanket structure, the fire blanket of the present invention has multiple bulges 2 for placing energy storage bags 3.

[0047] 2. The preparation process of the energy storage pack 3 is explained as follows: Essentially, it uses two high-temperature resistant metal materials to support a single-piece structure. Taking aluminum sheets as an example, two aluminum sheets are pressed into a shape such that... Figure 5 Regarding the structural characteristics shown, it should be noted that: during the pressing process, the hollow through pipe 5 and the side through pipe 4 are installed first, and their function is to support the energy storage pack 3. Then, according to the process requirements, the diaphragm sheet 7 is installed in the corresponding position, and the materials are filled in the corresponding combustible layer 8, flame-retardant layer 9 and bottom material layer 10.

[0048] 3. Finally, a diaphragm sleeve 13 is placed in the hollow tube 5. The diaphragm sleeve 13 is essentially a plastic bag, which is used to fill relevant materials. The temperature contact block 6 is then glued to the opening of the hollow tube 5.

[0049] The specific operating principle of this application is as follows:

[0050] S1. The opening directions of the hollow tube 5 and the side tube 4 are set as the working surface, that is, the fireproof cloth body 1 on one side of the working surface directly contacts the upper surface of the electric vehicle.

[0051] S2. Under normal temperature conditions, the fillers inside the combustible layer 8, the flame-retardant layer 9, and the base layer 10 exist independently and will not mix. In addition, the melting point of the contact point block 6 is specifically limited to less than or equal to 115°C. Thus, under normal temperature conditions, the hollow pipe 5 and the side pipe 4 are in a closed state. However, when the entire fireproof cloth body 1 covers the fire source, the heat generated by the thermal runaway of the power battery is high, which can make the minimum ambient temperature reach 150°C, thereby directly melting the contact point block 6.

[0052] S3. Because the contact point block 6 is melted, the diaphragm sleeve 13 inside the hollow pipe 5 falls naturally and is released. Affected by open flame or high temperature, the plastic bag outside the diaphragm sleeve 13 is melted, and the flame-retardant material II inside is released. The flame-retardant material II inside the diaphragm sleeve mainly covers the surface of the burning electric vehicle, isolating oxygen and preventing the flammable decorations of the electric vehicle from continuing to burn. Afterwards, the open flame or high temperature smoke "rushes" into the energy storage pack 3 through the vent 13 in the hollow pipe 5 and the side pipe 4. (Refer to...) Figure 5 Explanation: The diaphragm 7 is also made of plastic. Therefore, open flames or high-temperature fumes preferentially melt the diaphragm 7 on the upper side of the combustible layer 8. After the diaphragm 7 melts, the combustible agent inside the combustible layer 8 is released and "rushes" out from the vent on the diaphragm sleeve 13, consuming the air or oxygen below the fire blanket. Subsequently, the diaphragm 7 on the flame-retardant layer 9 is melted, and the flame-retardant material 1 inside the flame-retardant layer 9 is released. The flame-retardant material 1 "rushes" out from the vent on the diaphragm sleeve 13 and acts on the electric vehicle to isolate oxygen and prevent combustible decorations of the electric vehicle (excluding the power battery) from catching fire. It should be noted that the flame-retardant material 1 can be filled with graphite powder or white sugar, and the combustible agent can be a flammable liquid such as lighter fluid.

[0053] It should be noted that the step numbers used in the operating principle of this application are for reference only and should not be construed as limiting the operating principle steps. The specific operating steps can be determined according to the actual needs on site, and this application does not impose any restrictions.

[0054] The combustible agent released in combustible layer 8 reacts with oxygen in the air under the action of high temperature fire source, which consumes the oxygen below the working surface of the fire blanket and can also suppress the combustion and explosion of the electric vehicle power battery thermal runaway gas mixed with oxygen. The combustible agent here only consumes oxygen by combustion and will not enhance the combustion of electric vehicles.

[0055] The main function of the energy storage pack 3 is to consume oxygen. For example, the combustible agent in the combustible layer 8 is flammable liquids such as lighter fluid, and the flame-retardant material in the flame-retardant layer 9 is white sugar. The base material in the bottom material layer 10 only serves as a support filler during the combustion process. When the open flame "rushes" into the interior of the energy storage pack 3, the flame-retardant white sugar forms carbon particles. It should be noted that the flame-retardant material does not specifically refer to substances like white sugar. The essence of the flame-retardant material is mainly used to indicate that it has the ability to burn, but the combustion conditions are relatively harsh, and the combustion process can produce non-combustible carbon compounds.

[0056] The combustion products of the combustible layer 8 will continuously fill the interior of the energy storage pack 3. The combustion products will be ejected from the interior of the energy storage pack 3 through the vent 12 on the hollow pipe 5. The combustion products will also slowly accumulate below the fire blanket coverage, restricting the mixing of oxygen with the thermal runaway gas of the electric vehicle power battery, thus causing combustion and explosion.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fire blanket device for electric vehicle charging stations, characterized in that, It includes a fireproof cloth body (1) and several energy storage bags (3). The several energy storage bags (3) are respectively disposed inside the fireproof cloth body (1) and spaced apart from each other, so that the fireproof cloth body (1) forms several spaced bulges (2). An opening communicating with the energy storage bags (3) is opened on the fireproof body (1). A combustible layer (8) is disposed inside the energy storage bags (3). A hollow tube (5) is installed in the middle of the energy storage pack (3) along the thickness direction. The bottom of the hollow tube (5) passes through the energy storage pack (3) and is connected to the opening on the fireproof cloth body (1). A diaphragm sleeve (13) is installed inside the hollow tube (5). A temperature-contacting block (6) is set on the side of the diaphragm sleeve (13) facing the opening of the fireproof cloth body (1). The top of the hollow pipe (5) is connected to the upper wall of the energy storage tank (3), and a fire vent (12) is provided at a position slightly above the hollow pipe (5). The outlet of the fire vent (12) is located inside the energy storage tank (3). The energy storage pack (3) is provided with a combustible layer (8), a flame-retardant layer (9), a bottom material layer (10) and two fire-resistant empty layers (11). The combustible layer (8) is located between the two fire-resistant empty layers (11), the flame-retardant layer (9) is located below the lower fire-resistant empty layer (11), and the bottom material layer (10) is located below the flame-retardant layer (9). A diaphragm (7) is provided between adjacent layers.

2. The fire blanket device for electric vehicle charging stations according to claim 1, characterized in that: The melting point range of the contact point block (6) is 50℃-115℃.

3. The fire blanket device for electric vehicle charging stations according to claim 1, characterized in that: At the middle position of the energy storage pack (3), along the thickness direction and outside the hollow tube (5), there are a number of side tubes (4). The side tubes (4) are provided with a diaphragm sleeve inside, and a temperature-contacting block is provided below the diaphragm sleeve. The bottom of the side tubes (4) is connected to the opening on the fireproof cloth body (1), and the top is connected to the upper wall of the energy storage pack (3).

4. The fire blanket device for electric vehicle charging stations according to claim 1, characterized in that: The combustible layer (8) is filled with a combustible agent.

5. A fire blanket device for electric vehicle charging stations according to claim 1, characterized in that: The interior of the flame-retardant layer (9) is filled with a flame-retardant material.

6. A fire blanket device for electric vehicle charging stations according to claim 1, characterized in that: The fireproof cloth body (1) has a double-layer structure, and the energy storage bag (3) is located in the middle of the double-layer protective cloth body (1).

7. A fire extinguishing method using a fire blanket device for electric vehicle charging stations as described in any one of claims 1-6, characterized in that, Includes the following steps: Use the side of the fireproof cloth with an opening as the working surface, and lay the working surface directly over the fire source. The combustible layer inside the energy storage pack reacts with a heat source or open flame and then burns.

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