Fire blanket device for electric vehicle charging station and using method of fire blanket device

Abstract

The fire blanket device for the electric vehicle charging station 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 mutually spaced, so that a plurality of spaced bulge parts are formed in the fireproof cloth body, and openings communicating with the energy storage bags are formed in the fireproof cloth body; and a combustible layer is arranged in the energy storage bag. The multiple energy storage bags are additionally arranged in the fire blanket, combustible structures are arranged in the energy storage bags, combustion reaction can be generated under the high temperature of open fire or a heat source, and the fire blanket is essentially characterized in that consumption of oxygen around the fire blanket is accelerated, mixing of the oxygen and combustible gas generated by thermal runaway of a battery is inhibited, and the fire extinguishing and blocking effects are achieved; the method is suitable for the scene of rapid fire development of the electric vehicle charging station.

Description

Technical Field

[0001] The present invention relates to the technical field of fire spread barrier for electric vehicles, and in particular to a fire blanket device for an electric vehicle charging station and a use method thereof. Background Art

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

[0003] Conventional fire blankets are made of specially treated materials such as glass fiber and can isolate heat sources and oxygen. Battery thermal runaway occurs very quickly. In a short period of time, a large amount of white smoke (such as combustible gases such as carbon monoxide and hydrogen) will accumulate in the power battery during thermal runaway. The process from white smoke to fire only takes about 1 minute. Conventional fire blankets have a certain time limit in blocking the mixing of oxygen and combustible gases produced by battery thermal runaway, and thus cannot completely suppress the mixing of battery thermal runaway gas and oxygen to produce open flames or explosions, resulting in the fire of electric vehicle thermal runaway fire being intensified.

[0004] For example, the patent document with patent announcement number CN218871113U and patent name "A fire blanket for firefighting" specifically discloses that "it includes a fire blanket body, the four corners of the fire blanket body are provided with triangular reinforcement pads, the four corners of the fire blanket body are fixedly connected with pull ropes, and the outer surface of the fire blanket body is coated with fireproof glue; 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 fire blanket extinguishes fire by directly covering the fire source, but this fire extinguishing method takes a certain amount of time. Due to thermal runaway of the battery, the fire is fierce. The above-mentioned fire extinguishing method cannot completely suppress the thermal runaway gas generated by the power battery and the mixture with oxygen to produce open flames or explosions, and the fire extinguishing efficiency is low. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to solve the problem that the fire in the electric vehicle charging station is fierce and difficult to extinguish quickly.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A fire blanket device for an electric vehicle charging station comprises a fireproof cloth body and a plurality of energy storage bags, wherein the plurality of energy storage bags are respectively arranged inside the fireproof cloth body and spaced apart from each other so that the fireproof cloth body forms a plurality of spaced bulges, and an opening connected to the energy storage bag is provided on the fireproof body, wherein a combustible layer is arranged inside the energy storage bag.

[0008] The present application adds multiple energy storage packs to the fire blanket. A combustible structure is arranged inside the energy storage pack, which can produce a combustion reaction under the high temperature of an open flame or a heat source. Its essence is to accelerate the consumption of oxygen around the fire blanket, inhibit the mixing of oxygen and combustible gases generated by thermal runaway of the battery, and play a role in extinguishing the fire. It is suitable for scenarios where fires develop rapidly, such as electric vehicle charging stations.

[0009] As a further solution of the present invention: a hollow through tube is installed at the middle position of the energy storage pack along the thickness direction, and the bottom of the hollow through tube passes through the energy storage pack and is connected with the opening on the fireproof cloth body; a diaphragm sleeve is installed in the hollow through tube, and a temperature contact point block is provided on the side of the diaphragm sleeve facing the opening of the fireproof cloth body.

[0010] As a further solution of the present invention: the melting point of the touch temperature block ranges from 50°C to 115°C.

[0011] As a further solution of the present invention: the top of the hollow through pipe is connected to the upper wall of the energy storage package, and a fire vent is opened at an upper position of the hollow pipe, and the outlet of the fire vent is located inside the energy storage package.

[0012] As a further solution of the present invention: a plurality of side through tubes are provided at the middle position of the energy storage pack along the thickness direction and on the outside of the hollow through tube, a diaphragm sleeve is also provided inside the side through tube, and a temperature contact point block is provided below the diaphragm sleeve; the bottom of the side through tube 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 solution of the present invention: the interior of the energy storage pack is provided with a combustible layer, a flame-retardant layer, a bottom material layer and two fire-sensitive air layers, the combustible layer is located between the two fire-sensitive air layers, the flame-retardant layer is located below the lower fire-sensitive air layer, the bottom material layer is located below the flame-retardant layer, and a diaphragm is provided between two adjacent layers.

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

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

[0016] As a further solution of the present invention: the fireproof cloth body is 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 an electric vehicle charging station, comprising the following steps:

[0018] Use the open side of the fireproof cloth as the working surface, and lay one side of the working surface directly to the fire source;

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

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present application adds multiple energy storage packs to the fire blanket. A combustible structure is arranged inside the energy storage pack, which can produce a combustion reaction under the high temperature of an open flame or a heat source. Its essence is to accelerate the consumption of oxygen around the fire blanket, inhibit the mixing of oxygen and combustible gas generated by thermal runaway of the battery, and play a role in extinguishing the fire. It is suitable for scenes where the fire develops 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 and thermal runaway gas, inhibit the occurrence of open flames or explosions, and weaken the thermal radiation effect on surrounding vehicles that are not on fire;

[0022] 2. The present application preferentially releases the diaphragm sleeve inside the hollow through tube during the process of melting the touch temperature point block, and actively releases the filler inside it 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 cooperate with the energy storage pack to "actively consume oxygen", thereby inhibiting the mixing of oxygen around the fire blanket and the thermal runaway gas of the electric vehicle power battery, and achieving a better fire extinguishing effect;

[0023] 3. The present application sets up two fire-receiving empty layers, and the two fire-receiving empty layers are respectively placed on the upper and lower sides of the combustible layer. The open flame "peeks" into the two fire-receiving empty layers from the fire vents, and contacts the combustible layer from the upper and lower sides, thereby increasing the contact area between the combustible layer and the open flame and improving the combustion efficiency of the combustible layer. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0029] Figure 6 It is a cross-sectional view of a hollow through pipe in a fire blanket device for an electric vehicle charging station according to an embodiment of the present invention;

[0030] Description of reference numerals:

[0031] 1. Fireproof cloth body; 2. Bulging part; 3. Energy storage bag; 4. Side through pipe; 5. Hollow through pipe; 6. Temperature contact point block; 7. Diaphragm; 8. Combustible layer; 9. Flame-retardant layer; 10. Bottom material layer; 11. Fire-receiving air layer; 12. Fire vent; 13. Diaphragm sleeve. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In response to the problem of battery thermal runaway fires that may occur in charging stations, conventional fire blankets only use the high temperature resistance, flame resistance, and oxygen isolation characteristics of special materials to "block" oxygen for fire extinguishing purposes. However, in electric vehicle charging stations, due to the rapid thermal runaway speed of batteries and the adverse effect of promoting combustion after the thermal runaway flammable gases they generate mix with oxygen, conventional fire blankets are difficult to fully meet the fire extinguishing requirements of battery thermal runaway. The following technical solutions are proposed.

[0034] Reference Figure 1 and Figure 2 A fire blanket device for an electric vehicle charging station includes a fireproof cloth body 1, a bulge portion 2, and an energy storage bag 3; a plurality of energy storage bags 3 are provided, and the plurality of energy storage bags 3 are respectively placed inside the fireproof cloth body 1 and spaced apart from each other, so that the fireproof cloth body 1 forms a plurality of spaced bulge portions 2. It should be noted that the number of bulge portions 2 and energy storage bags 3 is the same, which is determined according to the actual size of the fireproof cloth body 1; at the same time, the spacing between two adjacent bulge portions 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 limit it.

[0035] It should be noted that the number of energy storage packs 3 corresponds to the number of bulge parts 2 and is determined according to the actual size of the fireproof cloth body 1; and the fireproof cloth body 1 of the present application is woven with fireproof material as a whole, and the specific fireproof material is common knowledge in the field and is not limited in the present application.

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

[0037] Reference Figure 1 The bulge portion 2 has a rectangular structure as a whole, and there is a gap between two adjacent bulge portions 2. The size of the gap is determined according to actual needs and is not limited in this application. The bulge portion 2 can also be designed into other shapes such as a circle. At the same time, several bulge portions 2 can also be distributed in a circular array, depending on actual needs.

[0038] Reference Figure 2 The energy storage bag 3 is arranged between the upper and lower layers of the fireproof cloth body 1. The cross-section of the energy storage bag 3 is a horizontal elliptical structure, and its upper and lower ends are bulges. The interior of the energy storage bag 3 is installed with a plurality of diaphragm sheets 7 distributed laterally along its thickness direction, and a hollow through pipe 5 is vertically installed at the middle position of the energy storage bag 3, and a plurality of side through pipes 4 are installed in a circular array on the outer side of the hollow through pipe 5, and the number of side through pipes 4 depends on the actual situation; the energy storage bag 3 is provided with a fire-receiving air layer 11, a combustible layer 8, a flame-retardant layer 9 and a base material layer 10, and a diaphragm sheet 7 is arranged between two adjacent layers, one end of the hollow through pipe 5 and the side through pipe 4 passes through one side of the energy storage bag 3, and the curved surface at one end of the hollow through pipe 5 and the side through pipe 4 is at the same curvature as the surface of one side of the fireproof cloth body 1, and the hollow through pipe 5 and the side through pipe 4 are hollow inside.

[0039] Reference Figure 4 and Figure 5 The side through pipe 4 and the hollow through pipe 5 have the same shape, both of which are hollow cylindrical structures. The side through pipe 4 and the hollow through pipe 5 are open at the bottom, and a fire vent 12 is opened on one side of the top, wherein the fire vent 12 is located at the fire-receiving empty layer 11 of the energy storage bag 3; the bottom of the hollow through pipe 5 passes through the bottom of the energy storage bag 3 and is connected to the opening on the fireproof cloth body 1, and the top of the hollow through pipe 5 is connected to the top of the energy storage bag 3.

[0040] Further, see Figure 6 A diaphragm sleeve 13 is installed in the hollow through pipe 5, and a 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 a diaphragm sleeve is also provided inside the side through pipe 4, and a temperature touch point block is provided below the diaphragm sleeve; the bottom of the side through 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, and the upper end position of the hollow through pipe 5 and the side through pipe 4 is fixedly connected to the top position of the inner wall of the energy storage bag 3, and the center point position of the hollow through pipe 5 and the center point position 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 through pipe 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 base material layer 10 are arranged from top to bottom along the non-working surface direction; and the fire-affected air layer 11 is a double-layer structure, and the combustible layer 8 is located in the middle position of the two fire-affected air layers 11.

[0043] Reference Figure 4 and Figure 5 The fire-receiving air layer 11 is a double-layer structure, the combustible layer 8 is located in the middle of the two fire-receiving air layers 11, and the combustible layer 8, the flame-retardant layer 9, the base material layer 10 and the filling diaphragm sleeve 13 are respectively filled with combustible agent, flame-retardant material 1, base material and flame-retardant material 2.

[0044] Basic principle: The key structure of the present application lies in the energy storage pack 3. The energy storage pack 3 will not participate in the role of blocking oxygen, but will actively burn to accelerate the consumption of oxygen. Its essence is to accelerate the consumption of oxygen around the fire blanket, inhibit the mixing of oxygen and the combustible gas generated by thermal runaway of the battery, and 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 on the fireproof cloth body 1, thereby not increasing the workload of the fireproof cloth body 1.

[0045] The essence of a fire blanket is a piece of woven cloth, and thus in this embodiment it is mainly used in conjunction with the preparation process of the overall invention, and its preparation process includes the following parts:

[0046] 1. After a layer of woven single-layer fireproof cloth body 1 is laid flat, a plurality of energy storage packs 3 are placed in sequence, and then another layer of woven single-layer fireproof cloth body 1 is covered on each energy storage pack 3, and finally the two layers of fireproof cloth body 1 are pressed together by pressing / sewing, so that compared with the conventional fire blanket structure, the fire blanket of the present invention has a plurality of bulge parts 2 for placing the energy storage packs 3;

[0047] 2. The preparation process of the energy storage pack 3 is explained as follows: its essence is to support a single-piece structure with two high-temperature resistant metal materials, taking aluminum sheets as an example, and press the two aluminum sheets into Figure 5 The structural characteristics shown in the figure need to be explained as follows: during the pressing process, the hollow through pipe 5 and the side through pipe 4 are installed first, and the two functions are to support the energy storage bag 3. Then, according to the process requirements, the diaphragm sheet 7 is installed in the corresponding position, and the corresponding combustible layer 8, the flame retardant layer 9 and the bottom material layer 10 are filled with materials;

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

[0049] The specific operating principles of this application are as follows:

[0050] S1, the opening directions of the hollow through pipe 5 and the side through pipe 4 are set as the working surface, that is, one side of the fireproof cloth body 1 corresponding to the working surface directly contacts the upper surface position of the electric vehicle;

[0051] S2. At room temperature, the fillers inside the combustible layer 8, the flame-retardant layer 9 and the base material layer 10 exist independently and will not be mixed. In addition, the melting point of the touch temperature point block 6 is specifically limited to be less than or equal to 115°C, so that at room temperature, the hollow through pipe 5 and the side through pipe 4 are in a closed state. However, when the integral 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 lowest ambient temperature reach 150°C, thereby directly melting the touch temperature point block 6;

[0052] S3. Because the temperature contact block 6 is melted, the diaphragm sleeve 13 inside the hollow through pipe 5 naturally falls and is released. Under the influence of open flame or high temperature, the plastic bag outside the diaphragm sleeve 13 is melted, and the flame retardant 2 inside is released. The flame retardant 2 in the diaphragm sleeve mainly covers the surface of the burning electric vehicle, isolating oxygen to prevent the combustible decorations of the electric vehicle from continuing to burn. After that, the open flame or high-temperature smoke "penetrates" into the energy storage bag 3 along the fire vent 13 in the hollow through pipe 5 and the side through pipe 4. Figure 5 To explain: the diaphragm 7 is essentially made of plastic material, so that open flames or high-temperature smoke will preferentially melt the diaphragm 7 on the upper side of the combustible layer 8. After the diaphragm 7 is melted, the combustible agent in the combustible layer 8 is released, and "rushes" out from the fire vent on the diaphragm sleeve 13 and burns, consuming the air or oxygen under the fire blanket; then the diaphragm 7 on the flame-retardant layer 9 is melted, and the flame-retardant material one in the flame-retardant layer 9 is released, and the flame-retardant material one "rushes" out from the fire vent on the diaphragm sleeve 13 and acts on the electric vehicle, which is used to isolate oxygen and prevent combustible decorations of the electric vehicle other than the power battery from catching fire; it should be noted that the flame-retardant material one can be filled with graphite powder or white sugar, etc., and the combustible agent can be selected from flammable liquids such as lighter oil.

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

[0054] The combustible agent in the combustible layer 8 is released and reacts with oxygen in the air under the action of a high-temperature fire source, thereby consuming the oxygen below the working surface of the fire blanket and suppressing the explosion of the mixture of thermal runaway gas from the electric vehicle power battery and oxygen. The combustible agent here only burns and consumes oxygen, and will not enhance the combustion of the electric vehicle.

[0055] The function of the energy storage pack 3 is mainly to consume oxygen. For example, the combustible agent in the combustible layer 8 is a flammable liquid such as lighter oil, the flame-retardant material in the flame-retardant layer 9 is white sugar, and the base material in the base material layer 10 is only a supporting filler during the combustion process. Then, when the open flame "penetrates" into the interior of the energy storage sleeve 3, the flame-retardant white sugar forms carbon particles. It should be noted that flame-retardants do not specifically refer to substances such as white sugar. The essence of flame-retardants is mainly used to indicate that they have the ability to burn, but the combustion conditions are relatively harsh, and the combustion process can produce non-combustible carbides.

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

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fire blanket device for an electric vehicle charging station, characterized in that: The invention comprises a fireproof cloth body (1) and a plurality of energy storage bags (3), wherein the plurality of energy storage bags (3) are respectively arranged inside the fireproof cloth body (1) and are spaced apart from each other so that the fireproof cloth body (1) forms a plurality of spaced bulges (2), and an opening is provided on the fireproof body (1) and is connected to the energy storage bags (3), wherein a combustible layer (8) is arranged inside the energy storage bags (3).

2. The fire blanket device for an electric vehicle charging station according to claim 1, characterized in that: A hollow through tube (5) is installed at the middle position of the energy storage pack (3) along the thickness direction, and the bottom of the hollow through 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 in the hollow through tube (5), and a temperature contact point block (6) is provided on the side of the diaphragm sleeve (13) facing the opening of the fireproof cloth body (1).

3. The fire blanket device for an electric vehicle charging station according to claim 2, characterized in that: The melting point of the contact temperature block (6) is in the range of 50°C to 115°C.

4. The fire blanket device for an electric vehicle charging station according to claim 2, characterized in that: The top of the hollow through pipe (5) is connected to the upper wall of the energy storage bag (3), and a fire vent (12) is provided at an upper position of the hollow pipe (5), wherein the outlet of the fire vent (12) is located inside the energy storage bag (3).

5. The fire blanket device for an electric vehicle charging station according to claim 2, characterized in that: A plurality of side through pipes (4) are provided at the middle position of the energy storage pack (3) along the thickness direction and on the outside of the hollow through pipe (5); a diaphragm sleeve is provided inside the side through pipe (4), and a temperature contact point block is provided below the diaphragm sleeve; the bottom of the side through 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 pack (3).

6. The fire blanket device for an electric vehicle charging station according to claim 1, characterized in that: The energy storage bag (3) is provided with a combustible layer (8), a flame retardant layer (9), a bottom material layer (10) and two fire-resistant air layers (11) inside, the combustible layer (8) is located between the two fire-resistant air layers (11), the flame retardant layer (9) is located below the lower fire-resistant air layer (11), the bottom material layer (10) is located below the flame retardant layer (9), and a diaphragm sheet (7) is provided between two adjacent layers.

7. The fire blanket device for an electric vehicle charging station according to claim 6, characterized in that: The combustible layer (8) is filled with a combustible agent.

8. The fire blanket device for an electric vehicle charging station according to claim 6, characterized in that: The interior of the flame retardant layer (9) is filled with a flame retardant.

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

10. A fire extinguishing method using the fire blanket device for an electric vehicle charging station as claimed in any one of claims 1 to 9, characterized in that: The steps include: Use the open side of the fireproof cloth as the working surface, and lay one side of the working surface directly to the fire source; The combustible layer inside the energy storage pack reacts with a heat source or an open flame and burns.

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