A ceramic fiber fireproof board for suppressing thermal spread between battery cells

Abstract

The present invention discloses a ceramic fiber fireproof board for suppressing thermal spread between battery cells, which comprises a three-layer hot-pressing composite structure. The three-layer hot-pressing composite structure includes a buffer ceramic fiber layer and flame-retardant ceramic fiber layers disposed on both surface sides of the buffer ceramic fiber layer. The flame-retardant ceramic fiber layer of the present invention is prepared by a wet vacuum forming process, with high hardness and large density. The buffer ceramic fiber layer is prepared by dry resin thermal curing, with low density and good elasticity. The sandwich structure of the buffer ceramic fiber layer and the flame-retardant ceramic fiber layer of this ceramic fiber fireproof board enables the fireproof board to effectively relieve the expansion force generated during battery charge and discharge through the buffer ceramic fiber layer with relatively high strength, and also to inhibit the thermal spread and diffusion of the battery cells through the flame-retardant ceramic fiber layer with relatively good toughness.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic fiber fireproof boards, and specifically to a ceramic fiber fireproof board for suppressing thermal spread between battery cells. Background Art

[0002] A ceramic fiber fireproof board refers to a board made of a refractory material, which has relatively high mechanical strength and heat insulation performance. During the installation of a battery pack, for the safety of battery use, a ceramic fiber fireproof board is usually arranged between battery cells;

[0003] In the application of the existing ceramic fiber fireproof board in batteries, due to its relatively high hardness, the expansion of the battery cannot be released to a certain extent, and the internal electrodes of the battery may be squeezed against each other due to excessive expansion force, resulting in lithium plating, thereby accelerating the capacity attenuation of the battery.

[0004] The defects of the existing fireproof boards are as follows:

[0005] 1. The patent document CN107953624A discloses a carbon fiber fireproof board. However, when this patented fireproof board is applied to a battery, it does not consider that the fireproof board can relieve the expansion force generated during battery charging and discharging while also suppressing the thermal spread and diffusion of battery cells;

[0006] 2. The patent document KR101942714B proposes a marine composite heat insulation and sound absorption / heat insulation material with a non-flammable fiberglass panel. However, this patented fireproof board does not consider increasing the toughness of the buffer ceramic fiber layer while also improving the antistatic ability of the buffer ceramic fiber layer;

[0007] 3. The existing fireproof boards usually only consider improving their fireproof and heat insulation performance, and rarely consider improving the wear resistance and heat resistance of the fireproof boards;

[0008] 4. The existing fireproof boards usually do not consider improving their antibacterial and mildew-proof ability, so that they can still be used normally in a humid environment. Summary of the Invention

[0009] The purpose of the present invention is to provide a ceramic fiber fireproof board for suppressing thermal spread between battery cells to solve the problems raised in the above background art.

[0010] To achieve the above purpose, the present invention provides the following technical solution: A ceramic fiber fireproof board for suppressing thermal spread between battery cells includes a three-layer hot-pressed composite structure, and the three-layer hot-pressed composite structure includes a buffer ceramic fiber layer and flame-retardant ceramic fiber layers arranged on both side surfaces of the buffer ceramic fiber layer;

[0011] The buffer ceramic fiber layer is composed of composite ceramic fibers dried after being impregnated with a thermosetting resin foaming mixed solution;

[0012] The flame-retardant ceramic fiber layer is made by drying the wet blank of the ceramic fiber mixture slurry.

[0013] Preferably, the buffer ceramic fiber layer is composed of the following raw materials in parts by weight: 55-97 parts of composite ceramic fibers, 0.5-0.6 parts of toughening agent, and 4-5 parts of resin powder.

[0014] Preferably, the composite ceramic fibers are high-alumina ceramic fibers, zirconium silicate fibers, and aluminum silicate fibers with a mass ratio of (1-1.2):(1.1-1.5):(2-2.5).

[0015] Preferably, the thermosetting resin foaming mixed solution is composed of the following raw materials in parts by weight: 120 parts of thermosetting resin, 0.6-2.5 parts of curing agent, 5-12 parts of foaming agent, 0.3-3 parts of graphene oxide, and 5-50 parts of water.

[0016] Preferably, the ceramic fiber mixture slurry is composed of the following raw materials in parts by weight: 75-90 parts of aluminum silicate fibers, 45-68 parts of high-alumina ceramic fibers, 8-15 parts of clay, 5-6 parts of refractory filler, 0.9-1.2 parts of organic silicone oil, and 0.5-0.7 parts of antibacterial treatment emulsion.

[0017] Preferably, the refractory filler is kaolin or alumina, and the antibacterial treatment emulsion is an inorganic silver ion antibacterial agent emulsion.

[0018] Preferably, the thickness of the buffer ceramic fiber layer is 1.0-2.5 mm, the thickness of the flame-retardant ceramic fiber layer is 0.2-1.2 mm, and the diameter of the buffer ceramic fiber layer is 3-6 μm.

[0019] Preferably, a binder layer is provided between the flame-retardant material layer and the buffer ceramic fiber layer. The thickness of the binder layer is 0.02-2 mm, and the binder is ceramic glue or silicone resin glue.

[0020] Preferably, the outer surface of the flame-retardant ceramic fiber layer is coated with an inorganic waterproof coating, and the thickness of the inorganic waterproof coating is 0.05-1 mm.

[0021] Preferably, the inorganic waterproof coating is composed of the following raw materials in weight ratio: 12-15 parts of deionized water as solvent, 0.5-0.9 parts of dispersant, 0.2-0.6 parts of defoaming agent, 20-25 parts of nano powder, 1.3-3.2 parts of ceramic fiber powder, 25-30 parts of acrylic emulsion, 0.18-0.3 parts of mildew-proofing aid, and 1.5-2 parts of liquid thickener.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The flame-retardant ceramic fiber layer of the present invention is prepared by a wet vacuum forming process, with high hardness and large density. The buffer ceramic fiber layer is prepared by dry resin thermal curing, with low density and good elasticity. The sandwich structure of the buffer ceramic fiber layer and the flame-retardant ceramic fiber layer in the ceramic fiber fireproof board enables the fireproof board to effectively relieve the expansion force generated during battery charging and discharging through the buffer ceramic fiber layer with higher strength, and also inhibit the thermal spread of the battery cells through the flame-retardant ceramic fiber layer with better toughness.

[0024] 2. By adding graphene oxide to the thermosetting resin foaming mixed solution for treating the buffer ceramic fiber layer of the present invention, the toughness of the buffer ceramic fiber layer can be increased, and at the same time, the antistatic ability of the buffer ceramic fiber layer can be improved. At the same time, by adding silicone oil to the ceramic fiber mixture slurry for preparing the flame-retardant ceramic fiber layer, the ceramic fiber fireproof board has hydrophobicity.

[0025] 3. By adding a certain proportion of clay and refractory fillers to the ceramic fiber mixture slurry for preparing the flame-retardant ceramic fiber layer of the present invention, the wear resistance and heat resistance of the ceramic fiber board are effectively improved; by using a solvent-free water-soluble thermosetting resin foaming mixed solution, the preparation process becomes more environmentally friendly.

[0026] 4. By adding an inorganic silver ion antibacterial agent emulsion to the ceramic fiber mixture slurry for preparing the flame-retardant ceramic fiber layer of the present invention, it has a certain antibacterial effect. The inorganic waterproof coating applied on the surface of the flame-retardant ceramic fiber layer enables it to be waterproof. At the same time, the inorganic silver ion antibacterial agent emulsion and the mildew-proofing agent in the inorganic waterproof coating act together to enhance the bactericidal and mildew-proofing ability of the ceramic fiber fireproof board. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] An embodiment provided by the present invention: A ceramic fiber fireproof board for suppressing thermal spread between battery cells, comprising a three-layer hot-pressed composite structure, and the three-layer hot-pressed composite structure includes a buffer ceramic fiber layer and flame-retardant ceramic fiber layers provided on both surface sides of the buffer ceramic fiber layer;

[0031] The buffer ceramic fiber layer is composed of composite ceramic fibers after being impregnated with a thermosetting resin foaming mixed solution and then dried;

[0032] The flame-retardant ceramic fiber layer is made by drying a wet blank of a ceramic fiber mixture slurry;

[0033] Among them, the buffer ceramic fiber layer is composed of raw materials in the following weight parts: 55 parts of composite ceramic fibers, 0.5 part of toughening agent, and 4 parts of resin powder;

[0034] The composite ceramic fibers are high-aluminum ceramic fibers, zirconium silicate fibers, and aluminum silicate fibers with a mass ratio of 1:1.1:2;

[0035] The thermosetting resin foaming mixed solution is composed of raw materials in the following weight parts: 120 parts of thermosetting resin, 0.6 part of curing agent, 5 parts of foaming agent, 0.3 part of graphene oxide, and 5 parts of water;

[0036] The ceramic fiber mixture slurry is composed of raw materials in the following weight parts: 75 parts of aluminum silicate fibers, 45 parts of high-aluminum ceramic fibers, 8 parts of clay, 5 parts of refractory filler, 0.9 part of organic silicone oil, and 0.5 part of antibacterial treatment emulsion;

[0037] The refractory filler is kaolin, and the antibacterial treatment agent is an inorganic silver ion antibacterial agent emulsion;

[0038] The thickness of the buffer ceramic fiber layer is 1.0 mm, the thickness of the flame-retardant ceramic fiber layer is 0.2 mm, and the diameter of the buffer ceramic fiber layer is 3 μm;

[0039] A binder layer is provided between the flame-retardant material layer and the buffer ceramic fiber layer, the thickness of the binder layer is 0.02 mm, and the binder is ceramic glue;

[0040] The outer surface of the flame-retardant ceramic fiber layer is coated with an inorganic waterproof coating, the thickness of the inorganic waterproof coating is 0.05 mm, and the inorganic waterproof coating is composed of 12 parts of deionized water as solvent, 0.5 part of dispersant, 0.2 part of defoaming agent, 20 parts of nano powder, 1.3 parts of ceramic fiber powder, 25 parts of acrylic emulsion, 0.18 part of mildew-proofing aid, and 1.5 parts of liquid thickener according to weight ratio.

[0041] Embodiment Two

[0042] An embodiment provided by the present invention: A ceramic fiber fireproof board for suppressing thermal spread between battery cells, comprising a three-layer hot pressing composite structure, and the three-layer hot pressing composite structure includes a buffer ceramic fiber layer and flame retardant ceramic fiber layers provided on both surface sides of the buffer ceramic fiber layer;

[0043] The buffer ceramic fiber layer is composed of composite ceramic fibers after being impregnated with a thermosetting resin foaming mixed solution and then dried;

[0044] The flame retardant ceramic fiber layer is made by drying a wet blank of a ceramic fiber mixture slurry;

[0045] Among them, the buffer ceramic fiber layer is composed of raw materials in the following weight parts: 62 parts of composite ceramic fibers, 0.55 part of toughening agent, and 4.2 parts of resin powder;

[0046] The composite ceramic fibers are high alumina ceramic fibers, zirconium silicate fibers and aluminum silicate fibers with a mass ratio of 1.2:1:2;

[0047] The thermosetting resin foaming mixed solution is composed of raw materials in the following weight parts: 120 parts of thermosetting resin, 0.6 part of curing agent, 5 parts of foaming agent, 0.3 part of graphene oxide, and 5 parts of water;

[0048] The ceramic fiber mixture slurry is composed of raw materials in the following weight parts: 75 parts of aluminum silicate fibers, 48 parts of high alumina ceramic fibers, 8 parts of clay, 5 parts of refractory filler, 0.9 part of silicone oil, and 0.5 part of antibacterial treatment emulsion;

[0049] The refractory filler is kaolin, and the antibacterial treatment agent is an inorganic silver ion antibacterial agent emulsion;

[0050] The thickness of the buffer ceramic fiber layer is 1.0 mm, the thickness of the flame retardant ceramic fiber layer is 0.2 mm, and the diameter of the buffer ceramic fiber layer is 3 μm;

[0051] A binder layer is provided between the flame retardant material layer and the buffer ceramic fiber layer, the thickness of the binder layer is 0.02 mm, and the binder is ceramic glue;

[0052] The outer surface of the flame retardant ceramic fiber layer is coated with an inorganic waterproof coating, the thickness of the inorganic waterproof coating is 0.05 mm, and the inorganic waterproof coating is composed of 12 parts of deionized water as solvent, 0.5 part of dispersant, 0.2 part of defoaming agent, 20 parts of nano powder, 1.3 parts of ceramic fiber powder, 25 parts of acrylic emulsion, 0.18 part of mildew proofing agent, and 1.5 parts of liquid thickener according to weight ratio.

[0053] Example Two

[0054] An embodiment provided by the present invention: A ceramic fiber fireproof board for suppressing thermal spread between battery cells, comprising a three-layer hot-pressed composite structure, and the three-layer hot-pressed composite structure includes a buffer ceramic fiber layer and flame-retardant ceramic fiber layers provided on both surface sides of the buffer ceramic fiber layer;

[0055] The buffer ceramic fiber layer is composed of composite ceramic fibers after being impregnated with a thermosetting resin foaming mixed solution and then dried;

[0056] The flame-retardant ceramic fiber layer is made by drying a wet blank of a ceramic fiber mixture slurry;

[0057] Among them, the buffer ceramic fiber layer is composed of raw materials in the following weight parts: 62 parts of composite ceramic fibers, 0.55 parts of toughening agent, and 4.2 parts of resin powder;

[0058] The composite ceramic fibers are high-aluminum ceramic fibers, zirconium silicate fibers, and aluminum silicate fibers with a mass ratio of 1.2:1:2;

[0059] The thermosetting resin foaming mixed solution is composed of raw materials in the following weight parts: 120 parts of thermosetting resin, 0.6 parts of curing agent, 5 parts of foaming agent, 0.8 parts of graphene oxide, and 14 parts of water;

[0060] The ceramic fiber mixture slurry is composed of raw materials in the following weight parts: 75 parts of aluminum silicate fibers, 48 parts of high-aluminum ceramic fibers, 8 parts of clay, 5 parts of refractory filler, 0.9 parts of organic silicone oil, and 0.5 parts of antibacterial treatment emulsion;

[0061] The refractory filler is kaolin, and the antibacterial treatment agent is an inorganic silver ion antibacterial agent emulsion;

[0062] The thickness of the buffer ceramic fiber layer is 1 mm, the thickness of the flame-retardant ceramic fiber layer is 0.3 mm, and the diameter of the buffer ceramic fiber layer is 3 μm;

[0063] A binder layer is provided between the flame-retardant material layer and the buffer ceramic fiber layer, the thickness of the binder layer is 0.10 mm, and the binder is ceramic glue;

[0064] The outer surface of the flame-retardant ceramic fiber layer is coated with an inorganic waterproof coating, the thickness of the inorganic waterproof coating is 0.05 mm, and the inorganic waterproof coating is composed of 12 parts of deionized water as solvent, 0.5 parts of dispersant, 0.2 parts of defoamer, 20 parts of nano powder, 1.3 parts of ceramic fiber powder, 25 parts of acrylic emulsion, 0.18 parts of mildew-proofing aid, and 1.5 parts of liquid thickener according to weight ratio.

[0065] Example Three

[0066] An embodiment provided by the present invention: A ceramic fiber fireproof board for suppressing thermal spread between battery cells, comprising a three-layer hot-pressed composite structure, wherein the three-layer hot-pressed composite structure includes a buffer ceramic fiber layer and flame-retardant ceramic fiber layers provided on both surface sides of the buffer ceramic fiber layer;

[0067] The buffer ceramic fiber layer is composed of composite ceramic fibers after being impregnated with a thermosetting resin foaming mixed solution and then dried;

[0068] The flame-retardant ceramic fiber layer is made by drying a wet blank of a ceramic fiber mixture slurry;

[0069] Among them, the buffer ceramic fiber layer is composed of raw materials in the following weight parts: 70 parts of composite ceramic fibers, 0.55 part of toughening agent, and 4.2 parts of resin powder;

[0070] The composite ceramic fibers are high-aluminum ceramic fibers, zirconium silicate fibers, and aluminum silicate fibers with a mass ratio of 1.1:1.1:2.2;

[0071] The thermosetting resin foaming mixed solution is composed of raw materials in the following weight parts: 120 parts of thermosetting resin, 0.8 part of curing agent, 7 parts of foaming agent, 1.2 parts of graphene oxide, and 25 parts of water;

[0072] The ceramic fiber mixture slurry is composed of raw materials in the following weight parts: 80 parts of aluminum silicate fibers, 48 parts of high-aluminum ceramic fibers, 8 parts of clay, 5 parts of refractory filler, 1 part of organic silicone oil, and 0.5 part of antibacterial treatment emulsion;

[0073] The refractory filler is kaolin, and the antibacterial treatment agent is an inorganic silver ion antibacterial agent emulsion;

[0074] The thickness of the buffer ceramic fiber layer is 1.5 mm, the thickness of the flame-retardant ceramic fiber layer is 0.8 mm, and the diameter of the buffer ceramic fiber layer is 4 μm;

[0075] A binder layer is provided between the flame-retardant material layer and the buffer ceramic fiber layer. The thickness of the binder layer is 0.12 mm, and the binder is ceramic glue;

[0076] The outer surface of the flame-retardant ceramic fiber layer is coated with an inorganic waterproof coating. The thickness of the inorganic waterproof coating is 0.05 mm. The inorganic waterproof coating is composed of 12 parts of deionized water as solvent, 0.5 part of dispersant, 0.2 part of defoaming agent, 20 parts of nano powder, 2.1 parts of ceramic fiber powder, 25 parts of acrylic emulsion, 0.18 part of mildew-proofing aid, and 1.5 parts of liquid thickener according to weight ratio.

[0077] Example Four

[0078] An embodiment provided by the present invention: A ceramic fiber fireproof board for suppressing thermal spread between battery cells, comprising a three-layer hot-pressed composite structure, and the three-layer hot-pressed composite structure includes a buffer ceramic fiber layer and flame-retardant ceramic fiber layers provided on both surface sides of the buffer ceramic fiber layer;

[0079] The buffer ceramic fiber layer is composed of composite ceramic fibers after being impregnated with a thermosetting resin foaming mixed solution and then dried;

[0080] The flame-retardant ceramic fiber layer is made by drying a wet blank of a ceramic fiber mixture slurry;

[0081] Among them, the buffer ceramic fiber layer is composed of raw materials in the following weight parts: 85 parts of composite ceramic fibers, 0.55 parts of toughening agent, and 4.6 parts of resin powder;

[0082] The composite ceramic fibers are high-aluminum ceramic fibers, zirconium silicate fibers, and aluminum silicate fibers with a mass ratio of 1.1:1.1:2.2;

[0083] The thermosetting resin foaming mixed solution is composed of raw materials in the following weight parts: 120 parts of thermosetting resin, 1.2 parts of curing agent, 9 parts of foaming agent, 2 parts of graphene oxide, and 38 parts of water;

[0084] The ceramic fiber mixture slurry is composed of raw materials in the following weight parts: 82 parts of aluminum silicate fibers, 55 parts of high-aluminum ceramic fibers, 10 parts of clay, 5 parts of refractory filler, 1 part of organic silicone oil, and 0.5 part of antibacterial treatment emulsion;

[0085] The refractory filler is kaolin, and the antibacterial treatment agent is an inorganic silver ion antibacterial agent emulsion;

[0086] The thickness of the buffer ceramic fiber layer is 1 mm, the thickness of the flame-retardant ceramic fiber layer is 1 mm, and the diameter of the buffer ceramic fiber layer is 4 μm;

[0087] A binder layer is provided between the flame-retardant material layer and the buffer ceramic fiber layer. The thickness of the binder layer is 0.12 mm, and the binder is ceramic glue;

[0088] The outer surface of the flame-retardant ceramic fiber layer is coated with an inorganic waterproof coating. The thickness of the inorganic waterproof coating is 0.05 mm. The inorganic waterproof coating is composed of 13 parts of solvent deionized water, 0.6 part of dispersant, 0.4 part of defoaming agent, 22 parts of nano powder, 2.5 parts of ceramic fiber powder, 26 parts of acrylic emulsion, 0.2 part of mildew-proofing aid, and 1.6 parts of liquid thickener according to weight ratio.

[0089] Example Five

[0090] An embodiment provided by the present invention: A ceramic fiber fireproof board for suppressing thermal spread between battery cells, comprising a three-layer hot-pressed composite structure, and the three-layer hot-pressed composite structure includes a buffer ceramic fiber layer and flame-retardant ceramic fiber layers provided on both side surfaces of the buffer ceramic fiber layer;

[0091] The buffer ceramic fiber layer is composed of composite ceramic fibers after being impregnated with a thermosetting resin foaming mixed solution and then dried;

[0092] The flame-retardant ceramic fiber layer is made by drying a wet blank of a ceramic fiber mixture slurry;

[0093] Among them, the buffer ceramic fiber layer is composed of the following raw materials in parts by weight: 90 parts of composite ceramic fibers, 0.58 part of toughening agent, and 4.8 parts of resin powder;

[0094] The composite ceramic fibers are high-aluminum ceramic fibers, zirconium silicate fibers, and aluminum silicate fibers with a mass ratio of 1.1:1.1:2.2;

[0095] The thermosetting resin foaming mixed solution is composed of the following raw materials in parts by weight: 120 parts of thermosetting resin, 2.4 parts of curing agent, 11 parts of foaming agent, 2.5 parts of graphene oxide, and 46 parts of water;

[0096] The ceramic fiber mixture slurry is composed of the following raw materials in parts by weight: 86 parts of aluminum silicate fibers, 60 parts of high-aluminum ceramic fibers, 12 parts of clay, 6 parts of refractory filler, 1 part of organic silicone oil, and 0.7 part of antibacterial treatment emulsion;

[0097] The refractory filler is kaolin, and the antibacterial treatment agent is an inorganic silver ion antibacterial agent emulsion;

[0098] The thickness of the buffer ceramic fiber layer is 2 mm, the thickness of the flame-retardant ceramic fiber layer is 1 mm, and the diameter of the buffer ceramic fiber layer is 5 μm;

[0099] A binder layer is provided between the flame-retardant material layer and the buffer ceramic fiber layer, the thickness of the binder layer is 0.15 mm, and the binder is ceramic glue;

[0100] The outer surface of the flame-retardant ceramic fiber layer is coated with an inorganic waterproof coating, the thickness of the inorganic waterproof coating is 1 mm, and the inorganic waterproof coating is composed of the following raw materials in weight ratio: 14 parts of solvent deionized water, 0.6 part of dispersant, 0.5 part of defoaming agent, 22 parts of nano powder, 3.1 parts of ceramic fiber powder, 28 parts of acrylic emulsion, 0.2 part of mildew-proofing aid, and 1.6 parts of liquid thickener.

[0101] Example Six

[0102] An embodiment provided by the present invention: A ceramic fiber fireproof board for suppressing thermal spread between battery cells, comprising a three-layer hot-pressed composite structure, wherein the three-layer hot-pressed composite structure includes a buffer ceramic fiber layer and flame-retardant ceramic fiber layers provided on both surface sides of the buffer ceramic fiber layer;

[0103] The buffer ceramic fiber layer is composed of composite ceramic fibers after being impregnated with a thermosetting resin foaming mixed solution and then dried;

[0104] The flame-retardant ceramic fiber layer is made by drying a wet blank of a ceramic fiber mixture slurry;

[0105] Among them, the buffer ceramic fiber layer is composed of raw materials in the following weight parts: 97 parts of composite ceramic fibers, 0.6 part of toughening agent, and 5 parts of resin powder;

[0106] The composite ceramic fibers are high-aluminum ceramic fibers, zirconium silicate fibers, and aluminum silicate fibers with a mass ratio of 1.2:1.5:2.5;

[0107] The thermosetting resin foaming mixed solution is composed of raw materials in the following weight parts: 120 parts of thermosetting resin, 2.5 parts of curing agent, 12 parts of foaming agent, 3 parts of graphene oxide, and 50 parts of water;

[0108] The ceramic fiber mixture slurry is composed of raw materials in the following weight parts: 90 parts of aluminum silicate fibers, 68 parts of high-aluminum ceramic fibers, 15 parts of clay, 6 parts of refractory filler, 1.2 parts of organic silicone oil, and 0.6 part of antibacterial treatment emulsion;

[0109] The refractory filler is alumina, and the antibacterial treatment agent is an inorganic silver ion antibacterial agent emulsion;

[0110] The thickness of the buffer ceramic fiber layer is 2.5 mm, the thickness of the flame-retardant ceramic fiber layer is 1.2 mm, and the diameter of the buffer ceramic fiber layer is 6 μm;

[0111] A binder layer is provided between the flame-retardant material layer and the buffer ceramic fiber layer. The thickness of the binder layer is 2 mm, and the binder is an organosilicon resin glue;

[0112] The outer surface of the flame-retardant ceramic fiber layer is coated with an inorganic waterproof coating. The thickness of the inorganic waterproof coating is 1 mm. The inorganic waterproof coating is composed of 15 parts of solvent deionized water, 0.9 part of dispersant, 0.6 part of defoamer, 25 parts of nano powder, 3.2 parts of ceramic fiber powder, 30 parts of acrylic emulsion, 0.3 part of mildew-proofing aid, and 2 parts of liquid thickener according to weight ratio.

[0113] Comparative Example 1

[0114] The difference between the ceramic fiber fireproof board of this comparative example and that of Example 1 is that an excessive amount of refractory filler is added, and the rest are the same as those in Example 1.

[0115] Comparative Example 2

[0116] The ceramic fiber fireproof board of this comparative example is different from that of Example 1 in that the thickness of the buffer ceramic fiber layer is 0.9 mm, and the thickness of the flame retardant ceramic fiber layer is 2 mm, and the rest are the same as those in Example 1.

[0117] The specific situations of the above Examples 1-6 and Comparative Examples 1-2 are as follows

[0118]

[0119]

[0120]

[0121]

[0122] The fireproof board products obtained in Examples 1-6 and Comparative Examples 1-2 were subjected to a fire resistance test and a tensile test in accordance with GB / T9978. This experiment mainly focused on the fire resistance duration and tensile strength of the fireproof board.

[0123] The recorded results of the fire resistance duration and tensile strength of the fireproof boards in Examples 1-6 and Comparative Examples 1-2 are as follows

[0124] Sample Name Fire Resistance Duration (min) Tensile Strength (Mpa) Example 1 130 0.72 Example 2 148 0.75 Example 3 150 0.83 Example 4 168 0.81 Example 5 160 0.85 Example 6 165 0.84 Comparative Example 1 170 0.56 Comparative Example 2 169 0.50

[0125] Combining Examples 1-6 and Comparative Examples 1-2 and analyzing in combination with the test results:

[0126] By comparing Examples 1-6 and Comparative Example 1, if the refractory filler in the ceramic fiber mixture slurry is excessive when preparing the flame retardant ceramic fiber layer, the fire resistance duration of the ceramic fiber fireproof board increases, but the tensile strength decreases;

[0127] By comparing Examples 1-6 and Comparative Example 2, if the buffer ceramic fiber layer is thinner and the flame retardant ceramic fiber layer is thicker, although the thicker flame retardant ceramic fiber increases the fire resistance duration, the thinner buffer ceramic fiber layer results in a lower tensile strength of the fireproof board.

[0128] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A ceramic fiber fireproof board for inhibiting heat spread between battery cells, comprising a three-layer hot-pressed composite structure, characterized in that: The three-layer hot-pressed composite structure includes a buffer ceramic fiber layer and a flame-retardant ceramic fiber layer disposed on both side surfaces of the buffer ceramic fiber layer; The buffer ceramic fiber layer is composed of composite ceramic fibers that are impregnated with a thermosetting resin foaming mixed solution and then dried; The flame retardant ceramic fiber layer is made by drying a wet blank of a ceramic fiber mixed slurry. The composite ceramic fiber is a high-aluminum ceramic fiber, a zirconium silicate fiber and an aluminum silicate fiber in a mass ratio of (1-1.2): (1.1-1.5): (2-2.5). The ceramic fiber mixed slurry is composed of the following raw materials in parts by weight: 75-90 parts of aluminum silicate fiber, 45-68 parts of high-aluminum ceramic fiber, 8-15 parts of clay, 5-6 parts of refractory filler, 0.9-1.2 parts of silicone oil and 0.5-0.7 parts of antibacterial treatment emulsion.

2. A ceramic fiber fireproof board for inhibiting heat spread between battery cells according to claim 1, characterized in that: The buffer ceramic fiber layer is composed of the following raw materials in parts by weight: 55-97 parts of composite ceramic fiber, 0.5-0.6 parts of toughening agent, and 4-5 parts of resin powder.

3. The ceramic fiber fireproof board for inhibiting heat spread between battery cells according to claim 1, characterized in that: The thermosetting resin foaming mixed solution is composed of the following raw materials in parts by weight: 120 parts of thermosetting resin, 0.6-2.5 parts of curing agent, 5-12 parts of foaming agent, 0.3-3 parts of graphene oxide and 5-50 parts of water.

4. The ceramic fiber fireproof board for inhibiting heat spread between battery cells according to claim 1, characterized in that: The refractory filler is kaolin or alumina, and the antibacterial treatment emulsion is an inorganic silver ion antibacterial agent emulsion.

5. The ceramic fiber fireproof board for inhibiting heat spread between battery cells according to claim 1, characterized in that: The thickness of the buffer ceramic fiber layer is 1.0-2.5 mm, the thickness of the flame-retardant ceramic fiber layer is 0.2-1.2 mm, and the diameter of the buffer ceramic fiber layer is 3-6 μm.

6. The ceramic fiber fireproof board for inhibiting heat spread between battery cells according to claim 1, characterized in that: An adhesive layer is arranged between the flame retardant ceramic fiber layer and the buffer ceramic fiber layer. The thickness of the adhesive layer is 0.02-2 mm, and the adhesive is ceramic glue or silicone resin glue.

7. The ceramic fiber fireproof board for inhibiting heat spread between battery cells according to claim 1, characterized in that: The outer surface of the flame-retardant ceramic fiber layer is coated with an inorganic waterproof coating, and the thickness of the inorganic waterproof coating is 0.05-1 mm.

8. The ceramic fiber fireproof board for inhibiting heat spread between battery cells according to claim 7, characterized in that: The inorganic waterproof coating consists of 12-15 parts of deionized water solvent, 0.5-0.9 parts of dispersant, 0.2-0.6 parts of defoamer, 20-25 parts of nano powder, 1.3-3.2 parts of ceramic fiber powder, 25-30 parts of acrylic emulsion, 0.18-0.3 parts of anti-mildew auxiliary agent and 1.5-2 parts of liquid thickener in weight ratio.

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