Fire-fighting cover

Abstract

The invention relates to the technical field of electric vehicle lithium battery protection, in particular to a fire protection cover which comprises a fire protection cover body, the fire protection cover body comprises a fire protection layer, the top of the fire protection layer is coated with a bonding layer, a protection layer is bonded to the top of the bonding layer, the fire protection layer comprises a base layer, and microcapsules and an explosion accelerant are soaked in the base layer. The fire-fighting cover body covers the surface of an automobile lithium battery, the inner wall of the fire-fighting cover body makes contact with the surface of the lithium battery, then the preset bolts penetrate through the mounting frame to mount the fire-fighting cover body, and when the lithium battery burns and explodes, the fire-fighting cover body is protected and reinforced through the reinforcing frame; when combustion occurs, the temperature in the fire-fighting cover main body rises, when the temperature rises to 150-300 DEG C, the core material in the microcapsule is gasified, the volume of the gasified core material expands to burst the wall material, and the gasified core material in the microcapsule is sprayed to the surface of the lithium battery combusted in the fire-fighting cover main body.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle lithium battery protection, in particular to a fire hood. Background Art

[0002] Recently, the use of electric vehicles as environmentally friendly vehicles is surging. When producing electric vehicles, lithium batteries are usually used to power the electric vehicles. When protecting the lithium batteries, fire hoods are usually used.

[0003] The existing fire hood can only isolate the fire source, so that the fire of the lithium battery burning in the fire hood cannot be suppressed. After the lithium battery is burned out, the fire is extinguished. It is impossible to extinguish the fire when the lithium battery is burning, which is easy to cause greater harm. In order to solve the above technical problems, we have designed a fire hood. Summary of the invention

[0004] The purpose of the present invention is to provide a fire hood, which has the advantage of convenient fire extinguishing, and solves the problem that the existing fire hood can only isolate the fire source, so that the fire of the lithium battery burning in the fire hood cannot be suppressed, and the fire extinguishing effect is achieved after the lithium battery is burned out. The fire cannot be extinguished when the lithium battery is burning, which easily causes greater harm.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fire hood, comprising a fire hood main body, the fire hood main body comprising a fire protection layer, the top of the fire protection layer is coated with an adhesive layer, the top of the adhesive layer is bonded with a protective layer, the fire protection layer comprises a base layer, the interior of the base layer is respectively impregnated with microcapsules and explosion accelerators.

[0006] Preferably, the base layer comprises 50 to 65 parts by weight of epoxy resin, 10 to 25 parts by weight of polydiamine, 10 to 15 parts by weight of carbon black, 5 to 10 parts by weight of rosin, 5 to 10 parts by weight of illite, and 2 to 10 parts by weight of bentonite.

[0007] Preferably, the fire-fighting layer comprises a substance consisting of 30 to 60 parts by weight of a base layer, 30 to 50 parts by weight of microcapsules, and 10 to 30 parts by weight of an explosion accelerator.

[0008] Preferably, the microcapsule comprises a core material and a wall material, the wall material is wrapped around the outer periphery of the core material, and the material of the core material is FK-5-1-12.

[0009] Preferably, the wall material comprises 75 to 90 parts by weight of a polymer resin, 5 to 10 parts by weight of starch, 2 to 10 parts by weight of a precipitant, and 2 to 10 parts by weight of a coagulant.

[0010] Preferably, the adhesive layer comprises 70 to 80 parts by weight of epoxy resin, 10 to 15 parts by weight of polyalkyl vinyl ether, 5 to 10 parts by weight of butanediol monoacrylate, and 5 to 10 parts by weight of rosin.

[0011] Preferably, a mounting frame is bonded to the surface of the fire hood body, and a reinforcement is bonded to the top of the mounting frame.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention covers the fire hood body on the surface of the automobile lithium battery so that the inner wall of the fire hood body contacts the surface of the lithium battery, and then installs the fire hood body by passing the preset bolts through the installation frame. When the lithium battery burns or explodes, the fire hood body is protected and reinforced by reinforcement to prevent damage to the fire hood body. 2. In the present invention, when combustion occurs, the temperature inside the fire hood body will rise. When the temperature rises to 150℃~300℃, the core material inside the microcapsule will be gasified due to the temperature rise. The volume of the gasified core material will expand and break the wall material, so that the gasified core material inside the microcapsule will be sprayed onto the surface of the burning lithium battery inside the fire hood body. The gasified core material will extinguish the fire on the surface of the lithium battery, thus preventing the lithium battery from burning for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an axonometric schematic diagram of the structure of the present invention; Figure 2 It is a schematic cross-sectional view of the fire hood body of the present invention; Figure 3 It is a schematic diagram of the composition of the fire protection layer of the present invention.

[0014] In the figure: 1. Fire hood body; 2. Fire protection layer; 21. Base layer; 22. Microcapsule; 23. Explosion accelerator; 3. Protective layer; 4. Adhesive layer; 5. Installation frame; 6. Reinforcement. DETAILED DESCRIPTION

[0015] See also Figure 1-Figure 3 The fire hood comprises a fire hood body 1, which comprises a fire hood layer 2, a bonding layer 4 is coated on the top of the fire hood layer 2, a protective layer 3 is bonded on the top of the bonding layer 4, and the fire hood layer 2 comprises a base layer 21, and microcapsules 22 and an explosion accelerator 23 are respectively impregnated in the base layer 21.

[0016] See also Figure 1 and Figure 3The base layer 21 includes 50 to 65 parts by weight of epoxy resin, 10 to 25 parts by weight of polydiamine, 10 to 15 parts by weight of carbon black, 5 to 10 parts by weight of rosin, 5 to 10 parts by weight of illite, and 2 to 10 parts by weight of bentonite. By providing the base layer 21, the microcapsules 22 and the explosion accelerator 23 can be carried, so that the microcapsules 22 and the explosion accelerator 23 can function normally. The epoxy resin is not limited as long as it is a compound having two or more epoxy groups in the molecule. For example, bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, Novolek epoxy resin, tetraepichlorohydrin tetrafunctional epoxy resin, brominated epoxy resin, rubber-modified epoxy resin can be used, and bisphenol A epoxy resin and rubber-modified epoxy resin are particularly preferred. Polydiamine is used as a curing agent to improve tensile strength and elongation. If it is less than 10 parts by weight, the performance improvement effect is poor. If it is more than 25 parts by weight, the curing time is shortened, the viscosity is increased, and the workability is reduced. Carbon black enhances the flexibility of the adhesive, so that it can be freely deformed according to the purpose of use of the fire hood. If it is less than 10 parts by weight, the flexibility is poor, and if it is more than 15 parts by weight, it affects the content of other components. Rosin improves the adhesion of the adhesive. If it is less than 5 parts by weight, the adhesive performance cannot be smoothly exerted. If it is more than 10 parts by weight, the workability is reduced due to excessive adhesion. Illite is a clay mineral belonging to the group of non-expandable or non-swelling phyllosilicates. In addition, since illite is non-flammable due to its high water absorption and heat resistance, it can absorb heat and suppress combustion when a fire occurs. In this case, if it is less than 5 parts by weight, the heat absorption and combustion suppression effects cannot be expected, and if it is more than 10 parts by weight, it may affect the composition ratio of other compositions and increase the manufacturing cost; Bentonite is a clay mineral with montmorillonite, a mineral of the smectite family, as its main component. It expands in volume as it absorbs water, supporting the fire-fighting layer 2 to be adsorbed on the protected object, thereby maximizing the fire-fighting efficiency. In this case, if it is less than 2 parts by weight, the required performance cannot be achieved, and if it is greater than 10 parts by weight, it may affect the content of other compositions.

[0017] See also Figure 1 and Figure 2 The fire-fighting layer 2 includes a base layer 21 of 30 to 60 parts by weight, microcapsules 22 of 30 to 50 parts by weight, and an explosion accelerator 23 of 10 to 30 parts by weight. By setting the explosion accelerator 23, it is easy to promote the explosion of the microcapsules 22 and to spray out the core material in the microcapsules 22 to extinguish the fire.

[0018] See also Figure 1 and Figure 3 The microcapsule 22 includes a core material and a wall material. The wall material is wrapped around the outer periphery of the core material. The material of the core material is FK-5-1-12. By setting the core material, fire extinguishing can be facilitated. CF3CF3C(O)CF(CF3)2 is a clean fire extinguishing agent composed of 12 F substituted in pentane, a ketone group in the middle, and a metal base substituted by F.

[0019] See also Figure 1 and Figure 3 The wall material includes 75 to 90 parts by weight of a polymer resin, 5 to 10 parts by weight of starch, 2 to 10 parts by weight of a precipitant, and 2 to 10 parts by weight of a coagulant. By providing the wall material, the core material can be easily protected and the microcapsule 22 can be effectively prevented from rupturing due to external pressure. The wall material is formed with a thickness of 2μm to 3μm. When the temperature is below a certain level, the core material formed inside is protected to prevent damage due to external forces. When the temperature is above a certain level, the core material increases in pressure due to vaporization phase change, and explodes by spraying toward the softened part of the wall material, thereby suppressing the fire. The polymer resin is easy to shape, and can withstand a certain degree of external force through its own elasticity, and softens due to heat, thereby inducing the fire extinguishing agent forming the core material to be ejected; The polymer resin is formed by one or more resins selected from the group consisting of polyurethane resin, polyurea resin, polyamide resin, polyester resin, polycarbonate resin, aminoaldehyde resin, melamine resin, polystyrene resin, styrene-acrylate copolymer resin, styrene-methacrylic acid copolymer resin, gelatin or its derivatives, polyvinyl alcohol, phenolic resin and resorcinol formaldehyde resin, and mixtures thereof. In this case, the polymer resin is preferably polyurethane resin or polyurethane resin; Starch not only induces the wall material to form smoothly, but also supports the adhesion between the core material and the wall material; The precipitant may include one or more precipitants selected from the group consisting of potassium acetate, sodium citrate, sodium chloride, ammonium chloride, sodium iodide, potassium iodide, copper sulfate, and sodium thiocyanate; The coagulant may include one or more coagulants selected from the group consisting of aluminum sulfate, zinc hydroxide, ferric hydroxide, and ferric chloride.

[0020] See also Figure 1 and Figure 2The adhesive layer 4 includes 70 to 80 parts by weight of epoxy resin, 10 to 15 parts by weight of polyalkyl vinyl ether, 5 to 10 parts by weight of butanediol monoacrylate, and 5 to 10 parts by weight of rosin. By providing the adhesive layer 4, the fire protection layer 2 and the protective layer 3 can be bonded together, and the fire protection hood body 1 can be kept stable.

[0021] The explosion accelerator 23 is a highly reactive metal powder having a low transition temperature and an explosive force.

[0022] The metal powder of the explosion accelerator 23 may be iron, aluminum, magnesium, etc. For example, the explosion accelerator 23 is micro aluminum powder in the form of nano aluminum particles attached thereto.

[0023] The protective layer 3 is formed by the outer side of the fire protection layer 2 , and supports and protects the fire protection layer 2 .

[0024] The protective layer 3 may be made of non-woven fabric, woven fabric or mesh. In addition, the protective layer 3 may also be made of natural fibers, synthetic fibers, regenerated fibers, glass fibers, carbon fibers and the like.

[0025] By impregnating the protective layer 3 with a flame retardant material, the fireproofing performance can be improved.

[0026] The flame retardant material may be a mixture of expanded graphite, antimony, decabromophenol and illite in a weight ratio of 2:1:1:0.5.

[0027] See also Figure 1 A mounting frame 5 is bonded to the surface of the fire hood main body 1, and a reinforcement 6 is bonded to the top of the mounting frame 5. By setting the mounting frame 5, the fire hood main body 1 can be easily installed. By setting the reinforcement 6, the fire hood main body 1 can be easily protected, and the fire hood main body 1 can be effectively prevented from being damaged.

[0028] When in use, the fire hood body 1 is covered on the surface of the automobile lithium battery so that the inner wall of the fire hood body 1 contacts the surface of the lithium battery, and then the preset bolts are passed through the installation frame 5 to install the fire hood body 1. When the lithium battery burns, the temperature inside the fire hood body 1 will rise. When the temperature rises to 150°C to 300°C or above, the continuous rise in temperature causes the core material in the microcapsule 22 to vaporize, and the volume of the vaporized core material expands to burst the wall material, so that the vaporized core material in the microcapsule 22 is sprayed onto the surface of the burning lithium battery in the fire hood body 1, and the vaporized core material extinguishes the fire on the surface of the lithium battery to prevent the lithium battery from burning for a long time.

[0029] To sum up: the fire hood, through the base layer 21, microcapsules 22, explosion accelerator 23, protective layer 3 and adhesive layer 4, solves the problem that the existing fire hood can only isolate the fire source, so that the fire of the lithium battery burning in the fire hood cannot be suppressed, and the fire is extinguished after the lithium battery is burned out, and the fire cannot be extinguished when the lithium battery is burning, which is easy to cause greater harm.

Claims

1. A fire hood, comprising a fire hood body (1), characterized in that: The fire hood body (1) comprises a fire extinguishing layer (2), the top of the fire extinguishing layer (2) is coated with an adhesive layer (4), the top of the adhesive layer (4) is bonded with a protective layer (3), the fire extinguishing layer (2) comprises a base layer (21), the inside of the base layer (21) is respectively impregnated with microcapsules (22) and an explosion accelerator (23).

2. The fire hood according to claim 1, characterized in that: The base layer (21) comprises 50 to 65 parts by weight of epoxy resin, 10 to 25 parts by weight of polydiamine, 10 to 15 parts by weight of carbon black, 5 to 10 parts by weight of rosin, 5 to 10 parts by weight of illite, and 2 to 10 parts by weight of bentonite.

3. The fire hood according to claim 1, characterized in that: The fire-fighting layer (2) comprises 30 to 60 parts by weight of a base layer (21), 30 to 50 parts by weight of microcapsules (22), and 10 to 30 parts by weight of an explosion accelerator (23).

4. The fire hood according to claim 1, characterized in that: The microcapsule (22) comprises a core material and a wall material, wherein the wall material is wrapped around the outer periphery of the core material, and the material of the core material is FK-5-1-12.

5. The fire hood according to claim 4, characterized in that: The wall material comprises 75 to 90 parts by weight of a polymer resin, 5 to 10 parts by weight of starch, 2 to 10 parts by weight of a precipitant, and 2 to 10 parts by weight of a coagulant.

6. The fire hood according to claim 1, characterized in that: The adhesive layer (4) comprises 70 to 80 parts by weight of epoxy resin, 10 to 15 parts by weight of polyalkyl vinyl ether, 5 to 10 parts by weight of butanediol monoacrylate, and 5 to 10 parts by weight of rosin.

7. The fire hood according to claim 1, characterized in that: A mounting frame (5) is bonded to the surface of the fire hood body (1), and a reinforcement (6) is bonded to the top of the mounting frame (5).

Images