KR20200025061A - A Light Sheet Having Insulation and Heat Dissipation for Secondary Cell Battery Pack and A Sheet Manufacturing Method - Google Patents

Abstract

The present invention relates to a light sheet having heat dissipation properties and insulation properties for a secondary cell battery pack, and a method of manufacturing the light sheet. More specifically, the present invention relates to a thermal interface material which exhibits efficient and uniform heat dissipation performance by including a low hardness insulating heat dissipation layer and a high heat dissipation layer, thereby having excellent characteristics of contact with a battery pack and excellent heat dissipation performance, is light to be easily used in a vehicle, and is formed of a thermoplastic elastomer (TPE) to be easily manufactured compared to an existing silicone sheet. The thermoplastic elastomer thermal interface material comprises a low hardness insulating heat dissipation layer (10) and a high heat dissipation layer (20), and the low hardness insulating heat dissipation layer (10) and the high heat dissipation layer (20) are prepared by mixing the thermoplastic elastomer (TPE), a thermal conductive filler, a flame retardant additive, a process oil, and an additive. Furthermore, a method of manufacturing the thermoplastic elastomer thermal interface material according to the present invention comprises: a first step of preparing a mixture of the low hardness insulating heat dissipation layer (10) and the high heat dissipation layer (20) by mixing the thermoplastic elastomer (TPE), the thermal conductive filler, the flame retardant additive, the process oil, and the additive; a second step of sheeting the mixture in the form of a two-layer sheet; and a third step of cutting the two-layer sheet to a required size.

Description

A light sheet having insulation and heat dissipation for secondary battery battery pack and manufacturing method thereof {A Light Sheet Having Insulation and Heat Dissipation for Secondary Cell Battery Pack and A Sheet Manufacturing Method}

The present invention relates to a light weight sheet and a method of manufacturing the same. More specifically, it is provided with a low hardness insulating heat dissipation layer and a high heat dissipation layer, and has excellent contact characteristics with a battery pack and excellent heat dissipation performance. The present invention relates to a heat dissipating and insulating lightweight sheet for a secondary battery battery pack, which is light and easy to be used in an automobile, and is made of TPE and is easy to manufacture compared to a conventional silicon sheet, and a manufacturing method thereof.

In recent years, automobiles are gradually changing from conventional engine cars to electric vehicles. Accordingly, the use of secondary batteries is increasing, and the use of high-capacity batteries is increasing to improve the driving distance. As the capacity of the battery increases, solving the heat dissipation problem has emerged as a very important technical task in order to maximize the safety and performance of the battery. In order to solve the heat dissipation problem of automobile batteries, the introduction of a cooling system is essential. In the past, air cooling was adopted mainly for cooling, but recently, water cooling has been increasingly adopted for more efficient heat dissipation. In order to adopt the water-cooled method, more efficient heat transfer materials are required at the interface between the battery pack and the cooling unit, which are heat sources.

As a conventional heat transfer material manufacturing technology for solving the heat dissipation problem, in Korean Patent Laid-Open Publication No. 10-2016-0084808, at least 90% of the total mass parts of the thermally conductive fillers by the thermally conductive silicone composition and the cured product and the composite sheet are α conversion rate. The thermally conductive silicone composition which is this alumina which is 90% or more, and whose weight loss rate when it is left to stand in air under 250 degreeC environment for 6 hours is less than 1% is proposed.

The prior art is a technology in which a large amount of thermally conductive fillers are filled and cured in thermosetting silicone, and exhibits high thermal stability of 250 ° C. in terms of cured silicone properties, whereas a large amount of high specific fillers is added to increase the overall specific gravity of the composition. In the process of hardening, the hardness rises and the adhesion to the heat source is inevitably deteriorated. In particular, the use of alumina as a thermally conductive filler is excellent in electrical insulation properties, but the thermal conductivity is 0.5W / mK or more, and substantially 1.0W / mK, and the thermal conductivity is too low to be used as a heat transfer material for battery packs.

In order to solve the problem of low thermal conductivity, Korean Patent No. 10-1697764 discloses a low-viscosity monomer, oligomer, resin, and the like in a high-heat-dissipating polymer composite material and graphite expanded by a manufacturing method thereof. A composite material formed by curing a preliminary composite material including at least one selected from the group consisting of a combination thereof is proposed.

The prior art is a technique of manufacturing by impregnating a resin in an expandable graphite having excellent thermal conductivity, and having a low density of 1.3 g / cm 3 or less, and having a high thermal conductivity of 5 W / mK to a high value of 21 W / mK. However, there is a problem that the process is very complicated, the flame retardancy does not come out, and the electrical conductivity is high due to the characteristics of the graphite and thus the insulation properties cannot be obtained.

Conventionally, a heat-transfer material is filled in a heat-resistant filler such as alumina having an insulating property, such as alumina, in a curable silicone that is currently used in the market, and manufactured in sheet form. However, due to the high content of alumina, the specific gravity is increased and the weight is heavy, and the heat conductivity is not high due to the limitation of the heat radiation characteristics of the alumina.

As the above-mentioned heat dissipation performance is required above a certain level, the adhesion to the heat source is good and the flame retardancy having the electrical insulation performance is easy to use in automobiles, but the light and easy to manufacture thermal interface materials are required. It is not presented.

Korean Patent Publication No. 10-2016-0084808 Korea Patent Registration No. 10-1697764

The present invention has been made to solve the above problems, the object of the present invention is a light secondary for the efficient heat dissipation of the secondary battery battery pack, the secondary provided with all the adhesion to the heat source, heat dissipation performance, insulation, flame retardant It is to provide a heat dissipation and insulating lightweight sheet for battery battery packs and a method of manufacturing the same.

In addition, an object of the present invention is to use a thermoplastic elastomer (TPE) as the main raw material can be easily produced by using a general thermoplastic synthetic resin processing method, and the heat dissipation and insulating lightweight sheet for a secondary battery battery pack simplified the manufacturing process and its manufacture To provide a way.

Technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

The heat dissipation and insulating lightweight sheet for a secondary battery battery pack according to the present invention is provided with a low hardness insulating heat dissipation layer and a high heat dissipation layer, wherein the low hardness insulating heat dissipation layer and the high heat dissipation layer are thermoplastic elastomer (TPE), thermal conductive filler And a flame retardant additive, process oil and additives, wherein the low hardness insulating heat dissipating layer includes a carbon ceramic composite as a heat conductive filler, and the high heat dissipating layer includes an ultra low specific gravity heat conductive filler as a heat conductive filler. It is done.

The low hardness insulating heat dissipation layer has a specific gravity of 1.6 or less, hardness Shore A 30 or less, thermal conductivity 0.5 to 3 W / mK, flame retardant UL94 V-0, dielectric breakdown voltage 5 to 30 kV / mm, and the high heat dissipation layer has a specific gravity of 1.6 or less Hardness Shore A 90 or less, thermal conductivity of 1.5 to 10 W / mK, characterized in that the flame retardant UL94 V-0.

The thermoplastic elastomer (TPE) is a styrene-ethylene-propylene copolymer (SEP), a styrene-ethylene-butylene-styrene block copolymer (Styrene-Ethylene-Butylene-Styrene, SEBS), styrene-ethylene At least one of -Styrene-Ethylene-Propylene-Styrene (SEPS) and styrene-ethylene-ethylene-propylene-styrene block copolymer (Stylene-Ethylene-Ethylene-Propylene-Stylene, SEEPS), The flame retardant additive is at least one of a nitrogen-based flame retardant, a metal hydroxide, a phosphorus flame retardant and an inorganic flame retardant adjuvant, the additive is characterized in that any one or more selected from thermal stabilizers, antioxidants, UV stabilizers, lubricants, coupling agents, pigments.

The low hardness insulating heat dissipating layer may include 1 to 350 parts by weight of a thermally conductive filler, 50 to 800 parts by weight of a flame retardant additive, 80 to 250 parts by weight of process oil, and 0.1 to 50 parts by weight of an additive based on 100 parts by weight of the thermoplastic elastomer (TPE). It is characterized in that it comprises 1 to 200 parts by weight of the carbon ceramic composite in the thermally conductive filler.

The high heat dissipation layer is 10 to 600 parts by weight of the thermally conductive filler, 50 to 800 parts by weight of the flame retardant additive, 80 to 250 parts by weight of the process oil and 0.1 to 50 parts by weight of the additive with respect to 100 parts by weight of the thermoplastic elastomer (TPE), The ultra-low specific gravity heat conductive filler among the heat conductive fillers is characterized in that it comprises 10 to 500 parts by weight.

The low hardness insulating heat dissipating layer and the high heat dissipating layer may be prepared by further including a reinforcing material, the reinforcing agent isoprene rubber (Isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene rubber (Styrene) Butadiene Rubber (SBR), polyChloroprene Rubber (CR), Acrylonitrile-Butadiene Rubber (NBR), Isoprene-Isobutadiene Rubber (IIR), Ethylene-propylene Ethylene-Propylene Rubber (EPR), Styrene-Butadiene-Styrene (SBS), Styrene-Isoprene-Styrene (SIS), Silicone Rubber, Fluorine Rogomumu, urethane rubber, acrylic rubber, polyethylene (PolyEthylene), polypropylene (PolyPropylene), polyisobutylene (PolyIsoButylene), at least one of alpha olefin resin, the reinforcing material is the thermoplastic elastomer (T PE) 5 to 200 parts by weight based on 100 parts by weight is characterized in that it is prepared by mixing.

The nitrogen-based flame retardant is at least one selected from ammonium phosphate, ammonium carbonate, triadine compound, melamine cyanurate or guanidine compound, the metal hydroxide is at least one selected from aluminum hydroxide, magnesium hydroxide, the phosphorus flame retardant is phosphate At least one selected from the group consisting of organic phosphorus-containing compounds, the inorganic flame retardant adjuvant is characterized in that any one or more selected from antimony trioxide, antimony pentoxide, glass beads, glass fibers, hollow glass beads, silica.

The thermally conductive fillers of the low hardness insulating heat dissipating layer and the high heat dissipating layer may include carbon black, carbon nanotubes, carbon fibers, graphene, plate graphite, spheroidal graphite, expanded graphite, expandable graphite, alumina, aluminum nitride, boron nitride, and silicon. Carbide, characterized in that at least one of the ceramic-carbon composite.

In addition, a method of manufacturing a lightweight sheet according to another embodiment of the present invention, the first step of preparing a mixture by mixing a thermoplastic elastomer (TPE), a thermally conductive filler, a flame retardant additive, a process oil and an additive, and the mixture is a two-layer sheet A second step of sheeting in the form and a third step of cutting the two-layer sheet to the required dimensions, the two-layer sheet is composed of a low-hard insulation insulating layer and a high heat radiation layer, the low hardness insulation The heat dissipation layer includes a carbon ceramic composite as a heat conductive filler, and the high heat dissipation layer includes an ultra low specific gravity heat conductive filler as a heat conductive filler.

In the heat dissipation and insulating lightweight sheet for a secondary battery battery pack according to the present invention and a method of manufacturing the same, the following effects are obtained.

The present invention has the effect of manufacturing a light-emitting sheet of heat dissipation and insulation for a secondary battery battery pack that is both light and heat-adhesive, heat dissipation, insulation and flame retardancy of the secondary battery battery pack.

In addition, by using a thermoplastic elastomer (TPE) as a main raw material can be easily produced by using a general thermoplastic synthetic resin processing method, it is possible to manufacture a heat-dissipating and insulating lightweight sheet for a secondary battery battery pack simplified the manufacturing process.

1 is a block diagram showing the structure of a heat-dissipating and insulating lightweight sheet for a secondary battery battery pack according to an embodiment of the present invention.
Figure 2 is a flow chart illustrating a heat dissipation and insulating lightweight sheet manufacturing method for a secondary battery battery pack of the present invention.

Specific matters including the problem to be solved, the solution to the problem, and the effects of the present invention as described above are included in the embodiments and drawings to be described below. Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Hereinafter, the present invention presented above will be described in detail with reference to the drawings of the heat-dissipating and insulating lightweight sheet for a secondary battery battery pack. 1 is a block diagram of a heat dissipation and insulating lightweight sheet for a secondary battery battery pack according to an embodiment of the present invention.

According to the present invention, the heat dissipation and insulating lightweight sheet for a secondary battery battery pack includes a low hardness insulating heat dissipation layer 10 and a high heat dissipation layer 20. The low hardness insulating heat dissipating layer 10 and the high heat dissipating layer 20 are preferably stacked in this order. A low hardness insulating heat dissipation layer may be in contact with an upper surface of the secondary battery battery pack, and the high heat dissipation layer may be stacked on an upper surface of the low hardness insulating heat dissipation layer.

First, the low hardness insulating heat radiation layer, specific gravity is 1.6 or less, hardness Shore A 30 or less, thermal conductivity of 0.5 to 3 W / mK, flame retardant UL94 V-0, it is preferably provided with an insulation breakdown voltage of 5 to 30 kV / mm. .

When the specific gravity of the low-hardness insulating heat insulating layer 10 is 1.6 or more, the weight of the seat becomes heavy, which is not good for fuel efficiency of the vehicle, and when the hardness exceeds Shore A 30, the contact with the heat source is not good, so that the heat is effectively removed. If the thermal conductivity is 0.5W / mK or less, the thermal conductivity is so low that the heat of the heat source is not easily released. In addition, since it is used in a secondary battery battery pack, a flame retardant characteristic is required, and when the thermoelectric breakdown voltage is 5 kV / mm or less, current may leak, which may hamper efficient battery operation or cause damage to the battery. .

In addition, the high heat dissipation layer is preferably provided with a hardness specific gravity of 1.6 or less, Shore A 90 or less, thermal conductivity of 1.5 to 10 W / mK, flame retardant UL94 V-0.

When the specific gravity of the high heat insulating layer 20 is 1.6 or more, the weight of the sheet becomes heavy, which is not good for fuel efficiency of the vehicle. When the hardness exceeds Shore A 90, when the low hardness insulating layer 10 is in contact with a heat source. It is difficult to remove heat effectively because the contact with the heat source is not good, and when the thermal conductivity is 1.5 W / mK or less, the thermal conductivity is so low that the heat of the heat source is not easily released. In addition, since it is used in a rechargeable battery pack, a flame retardant characteristic is required.

In addition, the low hardness insulating heat dissipation layer 10 and the high heat dissipation layer 20 may be manufactured by basically including a thermoplastic elastomer (TPE), a thermally conductive filler, a flame retardant additive, a process oil, and an additive.

The low hardness insulating heat dissipation layer and the high heat dissipation layer is characterized in that it can be prepared by further including a reinforcing material to reinforce physical properties.

First, the low hardness insulating heat dissipating layer 10 may include 1 to 350 parts by weight of a thermally conductive filler, 50 to 800 parts by weight of a flame retardant additive, 80 to 250 parts by weight of an additive, and 0.1 to 100 parts by weight of the thermoplastic elastomer (TPE). It may be prepared by mixing 50 parts by weight.

The high heat dissipating layer 20 may include 10 to 600 parts by weight of a thermally conductive filler, 50 to 800 parts by weight of a flame retardant additive, 80 to 250 parts by weight of process oil, and 0.1 to 50 parts by weight of 100 parts by weight of the thermoplastic elastomer (TPE). It can be prepared by mixing parts by weight.

The low hardness insulating heat dissipating layer and the high heat dissipating layer may be prepared by including 5 to 200 parts by weight of a reinforcing material based on 100 parts by weight of the thermoplastic elastomer (TPE) as necessary.

In more detail, the thermoplastic elastomer (TPE) is an elastic body that can be melted by applying heat and melted and then processed again in a predetermined form, such as a thermosetting elastomer, and can use a general synthetic resin processing method while having elasticity of rubber. Make sure

The thermoplastic elastomer (TPE) may be applied to any one, but in order to maximize the effect of the present invention, styrene-ethylene-propylene copolymer (SEP), styrene-ethylene-butylene-styrene block air Styrene-Ethylene-Butylene-Styrene (SEBS), Styrene-Ethylene-Propylene-Styrene (SEPS), Styrene-Ethylene-Ethylene-Byylene-Styrene (SEBS) At least one of Ethylene-Ethylene-Propylene-Stylene (SEEPS) is preferable, but more preferably styrene-ethylene-butylene-styrene (SEBS) block copolymer is most effective.

Next, the low hardness insulating heat dissipating layer and the high heat dissipating layer include a thermally conductive filler. The thermally conductive filler is composed of a heat transfer material, and the thermally conductive filler enables easy transfer of heat to be generated from a heat radiation target to be attached to the outside.

The thermally conductive filler is, for example, carbon black, carbon nanotube, carbon fiber, graphene, plate graphite, spheroidal graphite, expanded graphite, expandable graphite, alumina, aluminum nitride, boron nitride, silicon carbide, ceramic-carbon composites It is preferable that it is at least one.

Here, the carbon black, carbon nanotube, carbon fiber, graphene, plate graphite, spheroidal graphite, expanded graphite, expandable graphite is a carbon-based filler, characterized in that light and excellent thermal conductivity.

In addition, the alumina, aluminum nitride, boron nitride, silicon carbide is an inorganic filler, it is characterized by excellent electrical insulation.

In addition, the ceramic-carbon composite is a filler having the advantages of carbon-based and inorganic-based, characterized in that both excellent thermal conductivity and electrical insulation.

In addition, it is preferable that the thermally conductive filler is 1 to 350 parts by weight in 100 parts by weight of the thermoplastic elastomer (TPE). More specifically, it is preferable that the thermally conductive filler includes 1 to 200 parts by weight of the ceramic-carbon composite, and further includes 5 to 200 parts by weight of the carbon-based or inorganic thermally conductive filler.

When the content of the thermally conductive filler in the low hardness insulating heat generating layer 10 is less than 1 part by weight, thermal conductivity is remarkably lowered, so that heat transfer is difficult to occur. In fact, when the content exceeds 350 parts by weight, the specific gravity is increased. As the hardness increases, the adhesion to the heat source may be remarkably inferior or the mechanical properties may be remarkably inferior.

In addition, when the carbon-based thermally conductive filler is used alone as the thermally conductive filler, it is difficult to use the insulation breakdown voltage because of low insulation, and when the inorganic thermally conductive filler is used alone, the specific gravity is increased.

In the high heat dissipation layer 20, the thermally conductive filler may be 10 to 600 parts by weight based on 100 parts by weight of the thermoplastic elastomer (TPE). More specifically, the thermally conductive filler may be used alone or in combination of one or more thermally conductive fillers including 10 to 500 parts by weight of ultra low specific gravity thermally conductive fillers such as graphene, carbon nanotubes, expandable graphite, and expanded graphite.

When the content of the thermally conductive filler in the high heat dissipation layer 20 is less than 10 parts by weight, the thermal conductivity is significantly lowered, and in fact, heat transfer is difficult to be expressed. There is a possibility that the mechanical properties are significantly reduced, and it is preferable to mix under the above conditions.

Next, a flame retardant additive is included in the composition of the low hardness insulating heat dissipating layer and the high heat dissipating layer. The flame retardant additive is used to ensure the highest level of flame retardancy without lowering the physical properties of the composition. Here, the flame retardant is preferably composed of a nitrogen flame retardant, a metal hydroxide, a phosphorus flame retardant, a halogen flame retardant, and an inorganic flame retardant, and may be used by mixing one or two or more of them.

As a result of several experiments, the nitrogen-based flame retardant is made of at least one of ammonium phosphate, ammonium carbonate, triadine compound, melamine cyanurate or guanidine compound, and the metal hydroxide comprises aluminum hydroxide and magnesium hydroxide. The phosphorus flame retardant is made of at least one of melamine polyphosphate, ammonium polyphosphate, diammonium phosphate, monoammonium phosphate, polyphosphate amide, phosphate amide, melamine phosphate or red phosphate, and the halogen flame retardant is decabromodiphenyl oxide ( DBDPO), decabromodiphenylethene (DBDPE), brominated polystyrene (BPS), hexabromocyclododecane (HBCD), tetrabromobisphenolic (TBBA), tristribromophenoxycitrate azine Made of one, the inorganic flame retardant auxiliary agent 3 Antimony oxide, antimony pentoxide, glass beads, glass fibers, hollow glass beads, made of at least one of silica is most preferred to maximize the effect of the present invention.

In addition, the content of the flame retardant is preferably 50 to 800 parts by weight, more preferably 100 to 600 parts by weight based on 100 parts by weight of the thermoplastic elastomer (TPE).

If the content of the flame retardant is less than 50 parts by weight, the flame retardancy is significantly lowered, there is a problem in that it is difficult to express the flame retardancy in fact, if it exceeds 800 parts by weight, the specific gravity is high, there is a problem that the mechanical properties of the composition is significantly reduced.

Next, a process oil is included in the composition of the low hardness insulating heat dissipation layer and the high heat dissipation layer. The process oil serves to impart fluidity to the composition.

The process oil is preferably made of at least one of paraffinic or naphthenic oils, and more preferably, using paraffinic oils is most effective in preventing fluidity deterioration while improving fluidity in the present invention.

The process oil preferably has a kinematic viscosity at 40 ° C. of 95 cSt to 120 cSt, a flash point of 220 ° C. to 300 ° C., more preferably, a kinematic viscosity at 40 ° C. of 110 cSt to 120 cSt, and a flash point of 250 ° C. to 270 ° C. It is effective to be. If it is out of this range, there is a problem that it is difficult to give sufficient fluidity or the physical properties and flame retardancy are lowered.

The content of the process oil is preferably 80 to 250 parts by weight, and more preferably 100 to 200 parts by weight based on 100 parts by weight of the thermoplastic elastomer (TPE). If it is less than 80 parts by weight, the hardness of the composition rises and fluidity is lowered, and processing problems occur. If it exceeds 250 parts by weight, the hardness is too low and mechanical properties are significantly reduced. There is.

Next, an additive is further included in the composition of the low hardness insulating heat dissipation layer and the high heat dissipation layer. The additive is preferably any one or more selected from thermal stabilizers, antioxidants, UV stabilizers, lubricants, coupling agents, pigments.

The lightweight sheet of the present invention further includes an additive in the thermoplastic elastomer (TPE) to help improve flame retardancy and to improve durability as a whole.

More specifically, the heat stabilizer and the UV stabilizer not only helps to improve flame retardancy, but also serves to improve overall durability, and antioxidants also improve durability through an oxidation inhibitory effect, and pigments may be used for the use of the composition. Therefore, it plays a role to implement proper color.

The additive may preferably include 0.1 to 50 parts by weight, and more preferably 0.5 to 30 parts by weight based on 100 parts by weight of the thermoplastic elastomer (TPE). If it is less than 0.1 part by weight, there is a problem in that the synergistic effect due to addition is insignificant.

As described above, in the present invention, the low hardness insulating layer 10 may include 1 to 350 parts by weight of a thermally conductive filler, 50 to 800 parts by weight of a flame retardant additive, and process oil 80 based on 100 parts by weight of the thermoplastic elastomer (TPE). To 250 parts by weight and 0.1 to 50 parts by weight of the additives are prepared by mixing.

The high heat dissipating layer 20 is 10 to 600 parts by weight of the thermally conductive filler, 50 to 800 parts by weight of flame retardant additive, 80 to 250 parts by weight of process oil and 0.1 to 50 parts by weight of the additive with respect to 100 parts by weight of the thermoplastic elastomer (TPE) Prepare by mixing.

The composition of the low hardness insulating heat dissipation layer and the high heat dissipation layer may further include a reinforcing material. The reinforcing material is isoprene rubber (IR), butadiene rubber (Butadiene rubber, BR), styrene-butadiene rubber (SBR), polychloroprene rubber (CR), acrylonitrile- butadiene rubber (Acrylonitrile-Butadiene Rubber, NBR), Isoprene-Isobutadiene Rubber (IIR), Ethylene-Propylene Rubber (EPR), Styrene-Butadiene-Styrene Block Copolymer (Styrene-Butadiene- Styrene, SBS), styrene-isoprene-styrene block copolymer (Styrene-Isoprene-Styrene, SIS), silicone rubber, fluoro rubber, urethane rubber, acrylic rubber, polyethylene (PolyEthylene), polypropylene (PolyPropylene), polyisobutyl It is preferable that it is at least any one of ethylene (PolyIsoButylene) and an alpha olefin resin.

The reinforcing material preferably contains 5 to 200 parts by weight, and more preferably 30 to 150 parts by weight based on 100 parts by weight of the thermoplastic elastomer (TPE).

When the reinforcing material is mixed at less than 5 parts by weight with respect to 100 parts by weight of the thermoplastic elastomer (TPE) in each of the low-hard insulation insulating layer and the high heat dissipation layer, the reinforcing material may have a low reinforcing effect, and the thermoplastic elastomer (TPE) may be insignificant. ) If the mixture exceeds 200 parts by weight based on 100 parts by weight there is a possibility that the heat dissipation effect is lowered, it is preferable to mix under the above conditions.

2 is a flowchart illustrating a method of manufacturing a heat dissipating and insulating lightweight sheet for a rechargeable battery pack according to an embodiment of the present invention.

First step (S10) to prepare a mixture by mixing a thermoplastic elastomer (TPE), a thermally conductive filler, a flame retardant additive, process oil and additives.

Specifically, in the first step (S10), the low hardness insulating heat radiation layer 10 is 1 to 350 parts by weight of the thermally conductive filler, 50 to 800 parts by weight of the flame retardant additive, process based on 100 parts by weight of the thermoplastic elastomer (TPE) It is prepared by mixing 80 to 250 parts by weight of oil and 0.1 to 50 parts by weight of additive.

In addition, if necessary, it may be prepared including 5 to 200 parts by weight of the reinforcing material based on 100 parts by weight of the thermoplastic elastomer (TPE).

The low hardness insulating heat radiation layer has a specific gravity of 1.6 or less, hardness Shore A 30 or less, thermal conductivity of 0.5 W / mK to 3 W / mK, flame retardant UL94 V-0 or more, insulation breakdown voltage 5 kV / mm to 30 kV / mm It is preferable to mix as much as possible.

The high heat dissipating layer 20 is 10 to 600 parts by weight of the thermally conductive filler, 50 to 800 parts by weight of flame retardant additive, 80 to 250 parts by weight of process oil and 0.1 to 50 parts by weight of the additive with respect to 100 parts by weight of the thermoplastic elastomer (TPE) Prepare by mixing.

In addition, if necessary, it may be prepared including 5 to 200 parts by weight of the reinforcing material based on 100 parts by weight of the thermoplastic elastomer (TPE).

The high heat dissipation layer is preferably provided with a specific gravity of 1.6 or less, hardness Shore A 90 or less, thermal conductivity of 1.5 W / mK to 10 W / mK, flame retardant UL94 V-0 or more.

Next, in the second step S20, the mixture is melted and sheeted into sheets.

In the second step S20, the low hardness insulating heat insulating layer 10 and the high heat dissipating layer 20 are independently seated, and the low hardness insulating heat dissipating layer 10 and the high heat dissipating layer 20 are laminated together. It can be made into a sheet or a process of making a sheet of two layers of low hardness insulating heat dissipating layer 10 and high heat dissipating layer 20 at a time using a coextrusion facility.

Here, the low hardness insulating heat insulating layer 10 and the high heat dissipating layer 20 are independently sheeted to manufacture the low hardness insulating heat dissipating layer 10 and the high heat dissipating layer 20, and laminated to form a sheet. If manufactured, there is no need for a separate expensive coextrusion facility.

In addition, when the low hardness insulating heat insulating layer 10 and the high heat insulating layer 20 are made of a two-layer sheet of the low hardness insulating heat insulating layer 10 and the high heat insulating insulating layer 20 at once by using a coextrusion facility There is an advantage that can be minimized.

Next, the third step (S30) is to cut the two-layer sheet to the required dimensions.

In the third step, in order to closely contact the two-layer sheet to the secondary battery battery, it is necessary to cut it to a size suitable for the design, and a hole for fastening, etc. may be required. It is desirable to fabricate in dimensions.

Hereinafter, the present invention will be described through examples and comparative examples in which the characteristics of the heat-dissipating and insulating lightweight sheets for secondary battery battery packs are examined.

The hardness, flame retardancy, thermal conductivity and dielectric breakdown voltage of the heat dissipation and insulating lightweight sheet for the secondary battery battery pack manufactured by the present invention were measured, and the physical properties of the specimens in this experiment were as follows.

(1) Hardness: Specimen thickness measured by 3mm by ASTM D 2240

(2) Flame retardant: measured at 2mm specimen thickness by UL94 VB method

(3) Thermal Conductivity: Measure and prepare two types of 8T specimens by the ISO standard 22007-2 method.

(4) Insulation breakdown voltage: measured at 2mm thickness of specimen by ASTM D 149

(5) Specific gravity: measured by ASTM D 792 method

G. Low Hardness Insulation Radiation Layer (10)

Tables 1 and 3 below are specimens of the low hardness insulating heat dissipating layer 10 prepared by the present invention (Examples 1 to 5) and Tables 2 and 4 are low hardness insulating heat dissipating layers outside the scope of the present invention. (10) Measurement results of specific gravity, hardness, flame retardant performance, thermal conductivity and dielectric breakdown voltage according to the content of each component of the composition (Comparative Examples 1 to 9).

Classification Example One 2 3 4 5 Thermoplastic elastomer SEBS 100 100 100 100 100 reinforcement SBR 30 30 Thermally conductive filler Graphite 10 10 Ceramic-Carbon Composites 50 70 50 70 50 Alumina 50 Flame retardant Aluminum hydroxide 300 300 400 300 400 Organophosphorus compounds 20 20 30 Halogen flame retardant 20 15 Inorganic Flame Retardants 5 Process oil 100 100 100 100 100 additive Antioxidant 0.1 0.1 0.2 0.1 0.2 Lubricant 8 8 10 8 10

Example 1

Styrene-butylene-styrene (SEBS) block copolymer is used as a thermoplastic elastomer and 50 parts by weight of ceramic carbon composites and 50 parts by weight of alumina are used as a thermally conductive filler, and 300 parts by weight of aluminum hydroxide and an organophosphorus compound are used as a flame retardant. 20 parts by weight was used, 100 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Example 2

Styrene-butylene-styrene (SEBS) block copolymer is used as a thermoplastic elastomer and 10 parts by weight of graphite and 70 parts by weight of a ceramic carbon composite are used as a thermally conductive filler, and 300 parts by weight of aluminum hydroxide and an organophosphorus compound are used as a flame retardant. 20 parts by weight was used, 100 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Example 3

100 parts by weight of the styrene-butylene-styrene (SEBS) block copolymer as the thermoplastic elastomer, 30 parts by weight of the styrene-butadiene-rubber (SBR) block copolymer, 50 parts by weight of the ceramic carbon composite material as the thermally conductive filler, As the flame retardant, 400 parts by weight of aluminum hydroxide and 30 parts by weight of organophosphorus compound were used, 100 parts by weight of process oil was used, and 0.2 parts by weight of antioxidant and 10 parts by weight of lubricant were used as additives.

Example 4

The thermoplastic elastomer is a styrene-butylene-styrene (SEBS) block copolymer 100 parts by weight, a thermally conductive filler 10 parts by weight of graphite, 70 parts by weight of ceramic carbon composites, using a flame retardant 300 parts by weight of aluminum hydroxide and a halogen-based 20 parts by weight of flame retardant was used, 100 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Example 5

As a thermoplastic elastomer, 100 parts by weight of the styrene-butylene-styrene (SEBS) block copolymer and 30 parts by weight of the styrene-butadiene-rubber (SBR) block copolymer are used, and 50 parts by weight of the ceramic carbon composite material is used as the thermally conductive filler. For example, 400 parts by weight of aluminum hydroxide, 15 parts by weight of a halogen flame retardant, 5 parts by weight of an inorganic flame retardant aid were used, 100 parts by weight of process oil was used, and 0.2 parts by weight of antioxidant and 10 parts by weight of lubricant were used as additives.

result Example One 2 3 4 5 Hardness
(Shore A) 28 29 24 29 30 Flame Retardant Grade
(UL94, 2mm) V-0 V-0 V-0 V-0 V-0 Thermal conductivity
(W / mK) 0.6 0.7 0.6 0.7 0.7 Breakdown
(kV / mm) 10 6 13 6 13 importance 1.6 1.5 1.5 1.6 1.4

As shown in Table 2, the hardness is 30 or less, the flame retardancy is shown, the thermal conductivity is 0.5 or more, the dielectric breakdown is 5 or more, the specific gravity is 1.6 or less.

Classification Comparative example One 2 3 4 5 6 7 8 9 Thermoplastic elastomer SEBS 100 100 100 100 100 100 100 100 100 reinforcement SBR 30 30 30 Thermally conductive filler Graphite 100 10 10 Ceramic-Carbon Composites 50 70 70 Alumina 100 700 Flame retardant Aluminum hydroxide 300 400 400 300 80 300 300 Organophosphorus compounds 20 30 30 20 20 20 Halogen flame retardant Process oil 100 100 100 100 100 100 100 50 300 additive Antioxidant 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Lubricant 8 8 8 8 8 8 2 8 2

Comparative Example 1

100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer as a thermoplastic elastomer, 100 parts by weight of alumina as a thermally conductive filler, 300 parts by weight of aluminum hydroxide and 20 parts by weight of an organophosphorus compound as a flame retardant 100 parts by weight of oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 2

100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer as a thermoplastic elastomer, 400 parts by weight of aluminum hydroxide and 30 parts by weight of an organophosphorus compound as a flame retardant, 100 parts by weight of process oil, and an antioxidant as an additive 0.1 parts by weight and 8 parts by weight of lubricant were used.

Comparative Example 3

100 parts by weight of the styrene-butylene-styrene (SEBS) block copolymer and 30 parts by weight of the styrene-butadiene-rubber (SBR) block copolymer as a thermoplastic elastomer, 400 parts by weight of aluminum hydroxide and 30 parts by weight of the organophosphorus compound as a flame retardant 100 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 4

Use a styrene-butylene-styrene (SEBS) block copolymer as a thermoplastic elastomer, 100 parts by weight of alumina as a thermally conductive filler, 100 parts by weight of process oil, and 0.1 parts by weight of antioxidant and lubricant as an additive. Parts by weight were used.

Comparative Example 5

100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer as a thermoplastic elastomer, 100 parts by weight of graphite as a heat conductive filler, 300 parts by weight of aluminum hydroxide and 20 parts by weight of an organophosphorus compound as a flame retardant 100 parts by weight of oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 6

In a thermoplastic elastomer, 100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer and 30 parts by weight of a styrene-butadiene-rubber (SBR) block copolymer are used, and 50 parts by weight of a carbon ceramic composite is used as a thermally conductive filler. 100 parts by weight of oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 7

100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer and 30 parts by weight of styrene-butadiene-rubber (SBR) block copolymer as a thermoplastic elastomer, 80 parts by weight of aluminum hydroxide as a flame retardant, 100 parts by weight of process oil Parts, and 0.1 parts by weight of antioxidant and 2 parts by weight of lubricant were used as additives.

Comparative Example 8

The thermoplastic elastomer is a styrene-butylene-styrene (SEBS) block copolymer 100 parts by weight, a thermosetting filler 10 parts by weight of graphite and 70 parts by weight of a carbon ceramic composite, using a flame retardant 300 parts by weight of aluminum hydroxide and organophosphorus compound 20 parts by weight was used, 50 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 9

The thermoplastic elastomer is a styrene-butylene-styrene (SEBS) block copolymer 100 parts by weight, a thermosetting filler 10 parts by weight of graphite and 70 parts by weight of a carbon ceramic composite, using a flame retardant 300 parts by weight of aluminum hydroxide and organophosphorus compound 20 parts by weight was used, 300 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 2 parts by weight of lubricant were used as additives.

result Comparative example One 2 3 4 5 6 7 8 9 Hardness
(Shore A) 25 30 23 33 30 21 15 35 10 Flame Retardant Grade
(UL94, 2mm) V-1 V-0 V-0 NG V-0 NG NG V-0 NG Thermal conductivity
(W / mK) 0.6 0.4 0.4 0.7 0.8 0.5 0.2 0.7 0.5 Breakdown
(kV / mm) 18 19 20 15 0.1 5 25 5 12 importance 1.7 1.6 1.6 2.5 1.5 1.3 1.1 1.6 1.3

As shown in Table 4, in the case of Comparative Example 8, the hardness is not high and cannot be used. In Comparative Examples 4, 6, 7 and Comparative Example 9, the flame retardancy does not appear and thus cannot be used. In Comparative Examples 2 and 3 and Comparative Example 7, the thermal conductivity is less than 0.5 and cannot be used. In Comparative Example 5, the dielectric breakdown degree is not low. In the case of Comparative Example 1 and Comparative Example 4, the specific gravity is high and cannot be used.

N. High heat dissipation layer (20)

Table 5 and Table 6 below are the high heat insulating insulating layer 20 composition specimens prepared according to the present invention (Examples 6 to 8) and the high heat insulating insulating layer 20 composition outside the scope of the present invention (Comparative Example 10 To measurement results of specific gravity, hardness, flame retardant performance and thermal conductivity according to the content of each component of Comparative Example 15).

Classification Example Comparative example 6 7 8 10 11 12 13 14 15 Thermoplastic elastomer SEBS 100 100 100 100 100 100 100 100 100 reinforcement SBR 100 150 200 Thermally conductive filler black smoke 200 100 100 250 300 100 Low specific gravity 100 200 200 200 Alumina 10 700 Flame retardant additive Aluminum hydroxide 200 180 180 300 200 10 250 200 850 Organophosphorus compounds 20 20 10 10 20 30 Halogen flame retardant 30 30 Inorganic Flame Retardants 10 10 Process oil 100 50 50 100 100 100 100 100 100 additive Antioxidant 0.1 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 Lubricant 8 4 4 8 8 8 0.1 8 8

Example 6

Styrene-butylene-styrene (SEBS) block copolymer is used as a thermoplastic elastomer and 200 parts by weight of graphite and 100 parts by weight of low specific gravity graphite are used as a thermally conductive filler, and 200 parts by weight of aluminum hydroxide and an organophosphorus compound are used as a flame retardant. 20 parts by weight was used, 100 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Example 7

Styrene-butylene-styrene (SEBS) block copolymer is used as a thermoplastic elastomer and 100 parts by weight of graphite and 200 parts by weight of low specific gravity graphite are used as a thermally conductive filler, and 180 parts by weight of aluminum hydroxide and a halogen-based flame retardant are used as a flame retardant. 30 parts by weight and 10 parts by weight of inorganic flame retardant aid were used, 50 parts by weight of process oil was used, and 0.2 parts by weight of antioxidant and 4 parts by weight of lubricant were used as additives.

Example 8

100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer as a thermoplastic elastomer and 100 parts by weight of a styrene-butadiene-rubber (SBR) block copolymer, 100 parts by weight of graphite as a thermally conductive filler and 200 parts by weight of low specific gravity graphite Parts, 180 parts by weight of aluminum hydroxide, 30 parts by weight of halogen-based flame retardant, 10 parts by weight of inorganic flame retardant, 50 parts by weight of process oil, 0.2 parts by weight of antioxidant and 4 parts by weight of lubricant were used as additives. .

Comparative Example 10

Using 100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer as a thermoplastic elastomer, 10 parts by weight of alumina as a heat conductive filler, 300 parts by weight of aluminum hydroxide and 20 parts by weight of halogen-based flame retardant as a flame retardant, 100 parts by weight of oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 11

100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer as a thermoplastic elastomer and 150 parts by weight of a styrene-butadiene-rubber (SBR) block copolymer, 700 parts by weight of alumina as a thermally conductive filler, and a hydroxide as a flame retardant 200 parts by weight of aluminum and 10 parts by weight of halogen-based flame retardant were used, 100 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 12

As a thermoplastic elastomer, 100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer, 200 parts by weight of styrene-butadiene-rubber (SBR) block copolymer, 10 parts by weight of aluminum hydroxide and 10 parts by weight of an organophosphorus compound as a flame retardant 100 parts by weight of process oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 13

100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer as a thermoplastic elastomer, 250 parts by weight of graphite as a heat conductive filler, 250 parts by weight of aluminum hydroxide and 20 parts by weight of an organophosphorus compound as a flame retardant 100 parts by weight of oil was used, and 0.1 parts by weight of antioxidant and 0.1 part by weight of lubricant were used as additives.

Comparative Example 14

In a thermoplastic elastomer, 100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer is used, 300 parts by weight of graphite is used as a thermally conductive filler, 200 parts by weight of aluminum hydroxide and 30 parts by weight of an organophosphorus compound are used as a flame retardant. 100 parts by weight of oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

Comparative Example 15

100 parts by weight of a styrene-butylene-styrene (SEBS) block copolymer is used as a thermoplastic elastomer, 100 parts by weight of graphite and 200 parts by weight of low specific gravity graphite are used as a thermally conductive filler, and 850 parts by weight of aluminum hydroxide is used as a flame retardant. 100 parts by weight of oil was used, and 0.1 parts by weight of antioxidant and 8 parts by weight of lubricant were used as additives.

result Example Comparative example 6 7 8 10 11 12 13 14 15 Hardness
(Shore A) 45 60 50 25 60 50 45 57 75 Flame Retardant Grade
(UL94, 2mm) V-0 V-0 V-0 V-0 V-0 NG V-0 V-0 V-0 Thermal conductivity
(W / mK) 1.6 2.8 2.1 0.3 2 1.8 1.5 1.6 1.8 importance 1.5 1.6 1.5 1.4 2.7 1.2 1.7 1.7 2.5

As shown in Table 6, in Examples 6 to 8, the hardness is 90 or less, exhibits flame retardancy, thermal conductivity is 1.5 or more, and specific gravity is 1.6 or less. However, Comparative Example 12 is not applicable because it does not exhibit flame retardancy, Comparative Example 10 can not be used because of low thermal conductivity, Comparative Examples 11, Comparative Examples 13, 14 and Comparative Example 15 can not be used due to the high specific gravity. .

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from an equivalent concept should be construed as being included in the scope of the present invention.

10. Low hardness insulation heat dissipation layer
20. High heat insulation insulating layer
S10. First step of preparing a mixture by mixing a thermoplastic elastomer (TPE), a thermally conductive filler, a flame retardant additive, process oil and additives
S20. Second step of sheeting the mixture in the form of a two-layer sheet
S30. Third step of cutting the two-layer sheet to the required dimensions

Claims (9)

It is provided with a low hardness insulating heat dissipation layer and a high heat dissipation layer,
The low hardness insulating heat dissipating layer and the high heat dissipating layer are manufactured by including a thermoplastic elastomer (TPE), a thermally conductive filler, a flame retardant additive, a process oil and an additive,
The low hardness insulating heat dissipating layer includes a carbon ceramic composite as a thermally conductive filler,
The heat dissipation and insulating sheet for the secondary battery battery pack, characterized in that the high heat dissipation layer includes a very low specific gravity heat conductive filler as a thermal conductive filler. The method of claim 1,
The low hardness insulating layer is specific gravity 1.6 or less, hardness Shore A 30 or less, thermal conductivity 0.5 to 3 W / mK, flame retardant UL94 V-0, dielectric breakdown voltage 5 to 30 kV / mm,
The high heat dissipation layer has a specific gravity of 1.6 or less, hardness Shore A 90 or less, thermal conductivity of 1.5 to 10 W / mK, flame retardant UL94 V-0, the heat dissipation and insulating lightweight sheet for a secondary battery battery pack. The method of claim 1,
The thermoplastic elastomer (TPE) is a styrene-ethylene-propylene copolymer (SEP), styrene-ethylene-butylene-styrene block copolymer (Styrene-Ethylene-Butylene-Styrene, SEBS), styrene-ethylene At least one of -Styrene-Ethylene-Propylene-Styrene (SEPS) and styrene-ethylene-ethylene-propylene-styrene block copolymer (Stylene-Ethylene-Ethylene-Propylene-Stylene, SEEPS),
The flame retardant additive is at least one of nitrogen-based flame retardant, metal hydroxide, phosphorus flame retardant and inorganic flame retardant auxiliary agent,
The additive is a heat-dissipating and insulating lightweight sheet for a secondary battery battery pack, characterized in that any one or more selected from thermal stabilizers, antioxidants, UV stabilizers, lubricants, coupling agents, pigments. The method of claim 1,
The low hardness insulating heat dissipation layer,
1 to 350 parts by weight of the thermally conductive filler, 50 to 800 parts by weight of the flame retardant additive, 80 to 250 parts by weight of the process oil, and 0.1 to 50 parts by weight of the additive, based on 100 parts by weight of the thermoplastic elastomer (TPE),
Heat dissipation and insulating lightweight sheet for a secondary battery battery pack, characterized in that containing 1 to 200 parts by weight of the carbon ceramic composite of the thermally conductive filler. The method of claim 1,
The high heat dissipation layer
10 to 600 parts by weight of the thermally conductive filler, 50 to 800 parts by weight of the flame retardant additive, 80 to 250 parts by weight of the process oil and 0.1 to 50 parts by weight of the additive, based on 100 parts by weight of the thermoplastic elastomer (TPE),
Heat dissipation and insulating lightweight sheet for a secondary battery battery pack, characterized in that 10 to 500 parts by weight of the ultra-low specific gravity heat conductive filler of the thermal conductive filler. The method of claim 1,
The low hardness insulating heat dissipation layer and the high heat dissipation layer,
Can be manufactured with additional reinforcement,
The reinforcing agent isoprene rubber (IR), butadiene rubber (B), butadiene rubber (BR), styrene-butadiene rubber (SBR), polychloroprene rubber (CR), acrylonitrile- butadiene rubber (Acrylonitrile-Butadiene Rubber, NBR), Isoprene-Isobutadiene Rubber (IIR), Ethylene-Propylene Rubber (EPR), Styrene-Butadiene-Styrene Block Copolymer (Styrene-Butadiene- Styrene, SBS), styrene-isoprene-styrene block copolymer (Styrene-Isoprene-Styrene, SIS), silicone rubber, fluoro rubber, urethane rubber, acrylic rubber, polyethylene (PolyEthylene), polypropylene (PolyPropylene), polyisobutyl At least one of poly (IsoButylene) and alpha olefin resin,
The reinforcing material is a heat dissipation and insulating lightweight sheet for a secondary battery battery pack, characterized in that manufactured by mixing 5 to 200 parts by weight based on 100 parts by weight of the thermoplastic elastomer (TPE). The method of claim 1,
The nitrogen-based flame retardant is any one or more selected from ammonium phosphate, ammonium carbonate, triadine compound, melamine cyanurate or guanidine compound,
The metal hydroxide is at least one selected from aluminum hydroxide, magnesium hydroxide,
The phosphorus flame retardant is any one or more selected from organophosphorus compounds containing phosphate,
The inorganic flame retardant auxiliary agent is a heat dissipating and insulating lightweight sheet for a secondary battery battery pack, characterized in that at least any one selected from antimony trioxide, antimony pentoxide, glass beads, glass fibers, hollow glass beads, silica. The method of claim 1,
The thermally conductive filler of the low hardness insulating heat dissipation layer and the high heat dissipation layer,
Carbon black, carbon nanotube, carbon fiber, graphene, plate graphite, spheroidal graphite, expanded graphite, expandable graphite, alumina, aluminum nitride, boron nitride, silicon carbide, ceramic-carbon composites, characterized in that at least one of two Heat-resistant and insulating lightweight sheet for battery packs. A first step of preparing a mixture by mixing a thermoplastic elastomer (TPE), a thermally conductive filler, a flame retardant additive, a process oil, and an additive;
Seating the mixture in the form of a two-layer sheet;
And a third step of cutting the two-layer sheet to the required dimensions.
The two-layer sheet is composed of a low hardness insulating heat dissipation layer and a high heat dissipation layer,
The low hardness insulating heat dissipating layer includes a carbon ceramic composite as a thermally conductive filler,
The high heat dissipation layer is a thermally conductive filler, a method of manufacturing a heat-dissipating and insulating lightweight sheet for a secondary battery battery pack, characterized in that it comprises an ultra-low specific gravity heat conductive filler.

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