阅读说明：本技术 一种防火隔热金属板及其制备方法 (Fireproof heat-insulation metal plate and preparation method thereof ) 是由 朱传佳 于 2019-10-29 设计创作，主要内容包括：本发明提供了一种防火隔热金属板,包括：金属板；贴合在所述金属板两侧表面的隔热层；复合在所述隔热层外表面的防火层；所述防火层由包括环氧树脂、潜伏型固化剂、活性稀释剂、阻燃剂和少层石墨烯的防火涂料制备而成。与现有技术相比,本发明提供的防火隔热金属板包括防火层、隔热层、金属板,并采用特定结构连接而成,其中所述防火层由具有良好相互作用的特定组分的防火涂料制备而成,从而使防火隔热金属板整体具有良好的隔热效果、缓冲及防火效果,从而具有优异的机械强度和防火隔热性能。实验结果表明,本发明提供的防火隔热金属板一侧温度为1200℃时,另一侧温度可以控制在300℃以下,可满足新能源动力电池包的防火隔热要求,值得推广使用。(The invention provides a fireproof heat-insulating metal plate, which comprises: a metal plate; the heat insulation layers are attached to the surfaces of the two sides of the metal plate; the fireproof layer is compounded on the outer surface of the heat insulation layer; the fireproof layer is prepared from fireproof paint comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene. Compared with the prior art, the fireproof heat-insulation metal plate provided by the invention comprises a fireproof layer, a heat-insulation layer and a metal plate which are connected by adopting a specific structure, wherein the fireproof layer is prepared from fireproof paint with specific components and good interaction, so that the fireproof heat-insulation metal plate has good heat-insulation effect, buffering effect and fireproof effect, and has excellent mechanical strength and fireproof heat-insulation performance. Experimental results show that when the temperature of one side of the fireproof heat-insulation metal plate is 1200 ℃, the temperature of the other side of the fireproof heat-insulation metal plate can be controlled below 300 ℃, the fireproof heat-insulation requirements of a new energy power battery pack can be met, and the fireproof heat-insulation metal plate is worthy of popularization and application.)

1. A fire-resistant insulated metal panel comprising:

a metal plate;

the heat insulation layers are attached to the surfaces of the two sides of the metal plate;

the fireproof layer is compounded on the outer surface of the heat insulation layer;

the fireproof layer is prepared from fireproof paint comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene.

2. The fireproof and heat-insulating metal plate according to claim 1, wherein the metal plate is an aluminum alloy plate, a sheet metal plate or a stainless steel plate; the thickness of the metal plate is 0.2 mm-2 mm.

3. The fireproof and heat-insulating metal plate according to claim 1, wherein the heat-insulating layer is EVA foam; the thickness of the heat insulation layer is 0.2 mm-5 mm.

4. The fire-proof and heat-insulating metal plate according to claim 1, wherein the thickness of the fire-proof layer is 0.1mm to 0.5 mm.

5. The fire-proof heat-insulating metal sheet as claimed in claim 1, wherein the fire-proof coating comprises the following components:

30-50 parts by weight of epoxy resin;

5-15 parts of latent curing agent;

1-10 parts by weight of reactive diluent;

30-40 parts of flame retardant;

1 to 5 parts by weight of few-layer graphene.

6. The fire-proof heat-insulating metal plate according to claim 1, wherein the epoxy resin is one or more selected from the group consisting of epoxy resin E51, epoxy resin E44 and epoxy resin E42.

7. The fire insulated metal panel of claim 1, wherein the reactive diluent is selected from one or more of AGE diluent, 692 diluent, and 207 diluent.

8. The fireproof and heat-insulating metal plate according to claim 1, wherein the few-layer graphene has a particle size of 10-50 μm and 2-30 layers.

9. A method for preparing a fire-proof and heat-insulating metal sheet as claimed in any one of claims 1 to 8, comprising the steps of:

and adhering heat insulation layers on the surfaces of two sides of the metal plate, coating a fireproof coating comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene on the outer surface of each heat insulation layer, and curing to obtain the fireproof heat insulation metal plate.

10. The method according to claim 9, wherein the curing temperature is 80 ℃ to 120 ℃ and the curing time is 10min to 30 min.

Technical Field

The invention relates to the technical field of fireproof materials, in particular to a fireproof heat-insulation metal plate and a preparation method thereof.

Background

Lithium batteries have been vigorously developed in recent years as core power in the field of new energy automobiles. With the rapid promotion of national policies, the energy density and the endurance mileage of the electric vehicle are greatly improved, and the rapid development of the new energy electric vehicle industry is promoted; the lithium battery is used as a power battery to show high-efficiency energy storage efficiency, and meanwhile, the safety problem is increasingly outstanding, because the energy density of the lithium battery is improved to cause the compact structural design of the battery, the temperature aggregation generated in the charging and discharging process is accompanied, especially the thermal runaway risk of the conventional vigorously developed ternary lithium battery is greatly improved compared with that of the lithium iron phosphate battery, and the research and development and the storage of related safety technologies are necessary.

Some manufacturers have developed the fire-resistant protection of the battery box body, can effectively improve the safety factor of the electric automobile, prolong the escape time of passengers after an accident, and have positive significance for the development of the electric automobile industry. However, in most cases, the thermal runaway of lithium batteries is caused by the accumulation of heat in the charging and discharging processes of batteries in partial regions, and the risk of thermal runaway caused by other factors such as short circuit and mechanical collision may cause local high-temperature ignition; if can introduce buffer material in the gap between the battery, increase the thermal-insulated effect between the battery under the conventional regulation, promote the heat to outside diffusion, prevent the heat gathering, and effective separation flame is to the stretching of other regional batteries when local battery is on fire under the unexpected circumstances, prevents chain reaction's emergence, and this is beneficial to further promoting electric automobile's factor of safety, promotion electric automobile's security level. If dismantle the battery after novel materials such as application fire prevention coating will probably cause the battery bad or the increase by a wide margin of processing cost, use independent fire prevention thermal-insulated metal sheet, fill and fix the scheme in the gap between the battery and have more cost advantage, consequently develop the thermal-insulated buffer material of fire prevention on a convenient installation, the metal sheet basis that has certain intensity has good application prospect and positive meaning.

Disclosure of Invention

In view of the above, the present invention provides a fireproof and heat-insulating metal plate and a method for manufacturing the same, which has excellent mechanical strength and fireproof and heat-insulating properties.

The invention provides a fireproof heat-insulating metal plate, which comprises:

a metal plate;

the heat insulation layers are attached to the surfaces of the two sides of the metal plate;

the fireproof layer is compounded on the outer surface of the heat insulation layer;

the fireproof layer is prepared from fireproof paint comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene.

Preferably, the metal plate is an aluminum alloy plate, a sheet metal plate or a stainless steel plate; the thickness of the metal plate is 0.2 mm-2 mm.

Preferably, the heat insulation layer is EVA foam; the thickness of the heat insulation layer is 0.2 mm-5 mm.

Preferably, the thickness of the fireproof layer is 0.1 mm-0.5 mm.

Preferably, the fireproof coating comprises the following components:

30-50 parts by weight of epoxy resin;

5-15 parts of latent curing agent;

1-10 parts by weight of reactive diluent;

30-40 parts of flame retardant;

1 to 5 parts by weight of few-layer graphene.

Preferably, the epoxy resin is selected from one or more of epoxy resin E51, epoxy resin E44 and epoxy resin E42.

Preferably, the reactive diluent is selected from one or more of AGE diluent, 692 diluent, and 207 diluent.

Preferably, the few-layer graphene has a particle size of 10 to 50 μm and 2 to 30 layers.

The invention also provides a preparation method of the fireproof heat-insulation metal plate, which comprises the following steps:

and adhering heat insulation layers on the surfaces of two sides of the metal plate, coating a fireproof coating comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene on the outer surface of each heat insulation layer, and curing to obtain the fireproof heat insulation metal plate.

Preferably, the curing temperature is 80-120 ℃, and the curing time is 10-30 min.

The invention provides a fireproof heat-insulating metal plate, which comprises: a metal plate; the heat insulation layers are attached to the surfaces of the two sides of the metal plate; the fireproof layer is compounded on the outer surface of the heat insulation layer; the fireproof layer is prepared from fireproof paint comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene. Compared with the prior art, the fireproof heat-insulation metal plate provided by the invention comprises a fireproof layer, a heat-insulation layer and a metal plate which are connected by adopting a specific structure, wherein the fireproof layer is prepared from fireproof paint with specific components and good interaction, so that the fireproof heat-insulation metal plate has good heat-insulation effect, buffering effect and fireproof effect, and has excellent mechanical strength and fireproof heat-insulation performance. Experimental results show that when the temperature of one side of the fireproof heat-insulation metal plate is 1200 ℃, the temperature of the other side of the fireproof heat-insulation metal plate can be controlled below 300 ℃, the fireproof heat-insulation requirements of a new energy power battery pack can be met, and the fireproof heat-insulation metal plate is worthy of popularization and application.

In addition, the preparation method provided by the invention is simple, mild in condition and suitable for large-scale industrial production.

Drawings

FIG. 1 is a schematic structural view of a fireproof and heat-insulating metal plate provided in an embodiment of the present invention;

fig. 2 is a schematic view of an installation position of a fireproof and heat-insulating metal plate in a battery pack according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a fireproof heat-insulating metal plate, which comprises:

a metal plate;

the heat insulation layers are attached to the surfaces of the two sides of the metal plate;

the fireproof layer is compounded on the outer surface of the heat insulation layer;

the fireproof layer is prepared from fireproof paint comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene.

In the invention, the fireproof and heat-insulation metal plate comprises a metal plate, a heat insulation layer and a fireproof layer, and referring to fig. 1, fig. 1 is a schematic structural view of the fireproof and heat-insulation metal plate provided by the embodiment of the invention; the heat insulation layers are attached to the surfaces of the two sides of the metal plate to form a sandwich structure with the heat insulation layers on the two sides and the metal plate in the middle; the fireproof layer is compounded on the outer surfaces of the heat insulation layers on the two sides to form an integral structure with the outermost layers on the two sides being the fireproof layer, the secondary outer layers on the two sides being the heat insulation layers and the middle layer being the metal plate.

In the present invention, the metal plate is preferably an aluminum alloy plate, a sheet metal plate or a stainless steel plate, more preferably an aluminum alloy plate or a sheet metal plate. The source of the metal plate in the present invention is not particularly limited, and commercially available products of the above aluminum alloy plate, sheet metal plate and stainless steel plate known to those skilled in the art may be used. In the present invention, the thickness of the metal plate is preferably 0.2mm to 2mm, more preferably 1mm to 2 mm.

In the invention, the heat insulation layers are attached to the two side surfaces of the metal plate. In the invention, the heat insulation layer is preferably EVA foam. The source of the EVA foam is not particularly limited in the present invention, and commercially available products known to those skilled in the art, that is, EVA foam, can be usedCan be prepared. In the invention, the density of the EVA foam is preferably 0.10g/cm³～0.50g/cm³More preferably 0.4g/cm³～0.5g/cm³. The attaching mode is not particularly limited, and physical attaching known to those skilled in the art, such as attaching through an adhesive, may be adopted. In the present invention, the thickness of the heat insulating layer is preferably 0.2mm to 5mm, and more preferably 0.3mm to 0.5 mm.

In the invention, the fire-proof layer is compounded on the outer surface of the heat-insulating layer. In the present invention, the thickness of the flame retardant layer is preferably 0.1mm to 0.5mm, and more preferably 0.2mm to 0.5 mm.

In the invention, the fireproof layer is prepared from a fireproof coating comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene, and preferably comprises the following components:

30-50 parts by weight of epoxy resin;

5-15 parts of latent curing agent;

1-10 parts by weight of reactive diluent;

30-40 parts of flame retardant;

1 to 5 parts by weight of few-layer graphene.

In the present invention, the epoxy resin is preferably selected from one or more of epoxy resin E51, epoxy resin E44 and epoxy resin E42, and more preferably epoxy resin E51, epoxy resin E44 or epoxy resin E42. The source of the epoxy resin is not particularly limited in the present invention, and commercially available epoxy resins E51, E44 and E42, which are described above, known to those skilled in the art, may be used. In the present invention, the fire retardant coating material preferably includes 30 to 50 parts by weight of the epoxy resin, more preferably 40 to 50 parts by weight.

In the present invention, the latent curing agent is preferably one or more selected from the group consisting of EH-3293S, EH-4360S, Chuanjing MC120B and Chuanjing PA80, and more preferably EH3293S, EH-4360S or Chuanjing PA 80. The source of the latent curing agent in the present invention is not particularly limited, and commercially available products of the aforementioned Kabushiki Kaisha EH-3293S, EH-4360S, Chuanjing MC120B and Chuanjing PA80, which are well known to those skilled in the art, may be used. In the present invention, the fire retardant coating material preferably includes 5 to 15 parts by weight of the latent curing agent, more preferably 10 to 15 parts by weight.

In the present invention, the reactive diluent is preferably selected from one or more of AGE diluent, 692 diluent and 207 diluent, more preferably AGE diluent, 692 diluent or 207 diluent. The source of the reactive diluent in the present invention is not particularly limited, and commercially available products of the above AGE diluent, 692 diluent and 207 diluent, which are well known to those skilled in the art, may be used. In the present invention, the fire retardant coating material preferably includes 1 to 10 parts by weight of the reactive diluent, and more preferably 4 to 10 parts by weight.

In the present invention, the flame retardant is preferably a nitrogen-phosphorus type flame retardant. The source of the flame retardant is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the present invention, the fireproof coating preferably includes 30 to 40 parts by weight of a flame retardant.

In the invention, the few-layer graphene has excellent barrier property and hydrophobicity, the sheet structure of the few-layer graphene can obviously improve the toughness of the fireproof coating, obviously improve the compactness of the expanded carbon layer and improve the fireproof performance, and related research and development work is carried out by combining the properties of the few-layer graphene. In the present invention, the particle size of the few-layer graphene is preferably 10 μm to 50 μm, and more preferably 15 μm to 40 μm; the number of the few-layer graphene layers is preferably 2 to 30, and more preferably 5 to 28. The source of the few-layer graphene is not particularly limited, and the graphene is prepared by a mechanical stripping method and a redox method which are well known to those skilled in the art. In the present invention, the fireproof coating preferably includes 1 to 5 parts by weight of few-layer graphene.

The invention adopts the fireproof coating under the high-solid-content and single-component latent type (high-temperature curing type) curing scheme, and overcomes the defects of complex operation equipment, mixed use and short operation time of the double-component curing type fireproof coating; the fireproof coating can be stored at room temperature for a long time, and the curing reaction can be started at high temperature after the coating is finished, so that the fireproof coating has the advantages of flexible construction, quick curing and environmental protection.

The preparation method of the fireproof coating is not particularly limited, and the technical scheme of uniformly mixing the raw materials, which is well known by the technical personnel in the field, is adopted.

The fireproof heat-insulation metal plate comprises a fireproof layer, a heat insulation layer and a metal plate which are connected by adopting a specific structure, wherein the fireproof layer is prepared from fireproof coating with specific components and good interaction, so that the fireproof heat-insulation metal plate has good heat insulation effect, buffering effect and fireproof effect integrally, and has excellent mechanical strength and fireproof heat insulation performance. In addition, the fireproof heat-insulation metal plate provided by the invention can realize the purpose of controlling the fireproof heat-insulation effect by controlling the specific parameters of each technical characteristic.

The invention also provides a preparation method of the fireproof heat-insulation metal plate, which comprises the following steps:

and adhering heat insulation layers on the surfaces of two sides of the metal plate, coating a fireproof coating comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene on the outer surface of each heat insulation layer, and curing to obtain the fireproof heat insulation metal plate.

In the present invention, the manner of application is preferably screen printing, spraying or brushing.

In the present invention, the curing device is preferably a curing oven; the curing temperature is preferably 80-120 ℃, and more preferably 100-120 ℃; the curing time is preferably 10min to 30 min.

The preparation method provided by the invention is simple, mild in condition and suitable for large-scale industrial production.

The fireproof and heat-insulation metal plate provided by the invention can be applied to a battery pack for fireproof and heat insulation, and the schematic view of the installation position of the fireproof and heat-insulation metal plate in the battery pack is shown in figure 2, wherein the fireproof and heat-insulation metal plate is filled in the gaps among lithium batteries in the battery pack.

The invention provides a fireproof heat-insulating metal plate, which comprises: a metal plate; the heat insulation layers are attached to the surfaces of the two sides of the metal plate; the fireproof layer is compounded on the outer surface of the heat insulation layer; the fireproof layer is prepared from fireproof paint comprising epoxy resin, a latent curing agent, a reactive diluent, a flame retardant and few-layer graphene. Compared with the prior art, the fireproof heat-insulation metal plate provided by the invention comprises a fireproof layer, a heat-insulation layer and a metal plate which are connected by adopting a specific structure, wherein the fireproof layer is prepared from fireproof paint with specific components and good interaction, so that the fireproof heat-insulation metal plate has good heat-insulation effect, buffering effect and fireproof effect, and has excellent mechanical strength and fireproof heat-insulation performance. Experimental results show that when the temperature of one side of the fireproof heat-insulation metal plate is 1200 ℃, the temperature of the other side of the fireproof heat-insulation metal plate can be controlled below 300 ℃, the fireproof heat-insulation requirements of a new energy power battery pack can be met, and the fireproof heat-insulation metal plate is worthy of popularization and application.

In addition, the preparation method provided by the invention is simple, mild in condition and suitable for large-scale industrial production.

To further illustrate the present invention, the following examples are provided for illustration.