KR20200137721A - Automotive Graphene Carbon Fiber Seat Cover with Heating Function - Google Patents

Abstract

The present invention relates to a graphene carbon fiber sheet cover for a vehicle having a heating function, including: a separable heat transfer sheet made of a graphene-coated carbon fiber; and a connection and socket unit that is connected by wires to receive electricity generated from a battery of the vehicle. The separable heat transfer sheet includes: a carbon fiber layer including a plurality of carbon fibers; graphene coated on the carbon fiber layer to uniformly disperse a plurality of carbon fiber densities to improve electrical conductivity and heat generation; and at least one metal electrode attached to one surface of the graphene-coated carbon fiber layer.

Description

Automotive Graphene Carbon Fiber Seat Cover with Heating Function {Automotive Graphene Carbon Fiber Seat Cover with Heating Function}

The present invention relates to a graphene carbon fiber seat cover for automobiles having a heating function.

Recently, various convenience devices have been installed inside automobiles to satisfy consumers' sensibility and ride comfort.

Among them, heating seats for satisfying passengers' emotions by increasing the temperature of vehicle seats in winter are being applied not only to large luxury vehicles, but also to small vehicles and light vehicles.

In general, such a heating sheet is driven by installing heat-generating wires inside a cushion and a back of a vehicle seat and supplying power to the vehicle.

Conventional heating sheets for automobiles using heating wires are used in the form of attaching metal heating wires such as copper wires or nichrome wires to non-woven fabrics as heating wires.In order to prevent overheating due to the metal heating wires, a bimetal, actuator or thermostat (thermostat) A thermostat, such as, should be installed between the power source and the metal heating wire. Therefore, additional cost is required to install the temperature control device, and a space for installing the temperature control device is required.If a problem such as a breakdown occurs in the temperature control device, it is difficult to control the temperature of the metal heating wire, causing a fire inside the vehicle There is a possibility of getting burned.

In addition, in the heating sheet for automobiles using the existing metal heating wire, the sheet is heated by winding the metal heating wire to the bottom plate and the back plate. If a break occurs in the wound metal heating wire, it is difficult to exert the function of the heating sheet. There is a problem in that the repair cost is excessive because it has to be removed and reinstalled. In particular, in order to manufacture a heating sheet, there is an elongated groove formed in the middle of the bottom plate and the back plate to couple the outer seat cover, and the upper and lower heating wires must be connected by the groove. Since it is inserted into the groove and connected, there is a possibility that a disconnection may occur in the bent part during the manufacturing process or the use process. In the existing heating sheet for automobiles, if a disconnection of the heating wire occurs, the function of the heating sheet cannot be exercised, so it must be repaired and, accordingly, there was a case that it became an element of consumer complaint.

In addition, in the case of a heating sheet using a conventional metal heating wire, electromagnetic waves are generated from the metal heating wire, which adversely affects the health of the occupant, causing the occupant to be reluctant to use the heating device.

An object of the present invention is to provide warm comfort to the occupant by fabricating the fabric of the seat cover using carbon fiber, but to prevent damage to the occupant's health due to the generation of electromagnetic waves.

In addition, an object of the present invention is to heat a seat cover by receiving electricity attached to a vehicle seat and generated from a battery of a vehicle through a cigar jack.

In order to achieve the above object, the present invention is a separable heat transfer sheet made of graphene-coated carbon fiber; The graphene carbon fiber consists of a connection and a socket part connected by wires to receive electricity generated from a battery of a vehicle, wherein the detachable heat transfer sheet includes: a carbon fiber layer including a plurality of carbon fibers; Graphene coated on the carbon fiber layer to uniformly disperse a plurality of carbon fiber densities to improve electrical conductivity and heat generation; And it provides a graphene carbon fiber sheet cover for automobiles having a heating function including at least one metal electrode attached to one surface of the carbon fiber layer coated with the graphene.

The present invention has the effect of controlling the heat transfer of an occupant's seat by manufacturing the fabric of a seat cover for an automobile using graphene carbon fiber having a heat generating function.

In addition, the present invention has the effect of preventing the health of the occupant from being damaged due to the generation of electromagnetic waves.

In addition, according to the present invention, the seat cover is manufactured to be detachable, so that it can be seated and used at any time, and when not required, it can be stored separately.

1 is a perspective view of a graphene carbon fiber sheet cover for automobiles having a heating function according to the present invention.
2 is a cross-sectional view of a graphene carbon fiber seat cover for automobiles having a heating function according to the present invention.

The following content merely illustrates the principles of the present invention. Therefore, those skilled in the art can implement the principles of the present invention and invent various devices included in the concept and scope of the present invention, although not clearly described or illustrated herein. In addition, it is understood that all conditional terms and examples listed in this specification are, in principle, expressly intended only for the purpose of making the concept of the present invention understood, and are not limited to the embodiments and states specifically listed as such. Should be.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention belongs. It is provided to completely inform the scope of the invention to those who have it, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

Although the first, second, etc. are used to describe various elements, components and/or sections, of course, these elements, components and/or sections are not limited by these terms. These terms are only used to distinguish one element, component or section from another element, component or section. Therefore, it goes without saying that the first element, the first element, or the first section mentioned below may be a second element, a second element, or a second section within the technical scope of the present invention.

The terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprises" and/or "made of" a referenced component, step, operation and/or element is one or more of the other elements, steps, operations and/or elements. It does not exclude presence or addition.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a graphene carbon fiber sheet cover for automobiles having a heating function according to the present invention.

Referring to Figure 1, the graphene carbon fiber seat cover 100 for automobiles having a heating function according to the present invention, a detachable heat transfer sheet 10 is seated on the seat, the separable heat transfer sheet 10 is graphene coated It is made of carbon fiber and includes a connection part 20 and a socket part 30 which are connected by wires so that the graphene carbon fiber can receive electricity generated from a battery of a vehicle.

In the present invention, the separable heat transfer sheet 10 attaches a plurality of copper plates 12 to have a regular interval on two graphene-coated carbon fibers 11 and connects wires to one end of the copper plate 12, respectively, The connected graphene-coated carbon fiber 11, copper plate 12, and wire are coated with a synthetic resin cover paper, and each wire protruding out of the cover paper is collected at the connection part 20 and connected to the socket part 30.

At this time, electricity generated from the battery of the vehicle is transferred through the socket part 30, the connection part 20, and the copper plate 12, respectively, to heat the graphene-coated carbon fiber 11 to heat the detachable heat transfer sheet 10. I can.

Although not shown in the present invention, the connection part 20 of the detachable heat transfer sheet 10 may include a switch for turning on/off power and a temperature control device for controlling the temperature of the heat transfer sheet 10.

2 is a cross-sectional view of a graphene carbon fiber seat cover for a vehicle having a heating function according to the present invention.

Referring to FIG. 2, the graphene carbon fiber sheet cover for automobiles having a heating function according to the present invention includes a carbon fiber layer 111 including a plurality of carbon fibers, and graphene 112 coated on the carbon fiber layer 111. ) And at least one metal electrode 113 attached to one surface of the carbon fiber layer 111 coated with the graphene 112. Here, the graphene 112 is mixed and coated with the carbon fiber layer 111. The carbon fiber layer 111 coated with the graphene 112 becomes a heating element that emits heat, and the metal electrode 113 transmits current to the carbon fiber layer 111 that emits heat.

That is, the carbon fiber layer 111 coated with the graphene 112 becomes a heating unit, and the metal electrode 113 becomes an electrode unit. At this time, the carbon fiber layer 111 coated with the graphene 112 is at least one impregnated with a conductive adhesive that attaches the at least one metal electrode 113 to one surface of the carbon fiber layer 111 coated with the graphene 112 Includes an impregnated area 114 of.

The carbon fiber layer 111 coated with the graphene 112 serving as a heating unit and the metal electrode 113 serving as the electrode unit each have different resistivity, and the voltage applied by this resistance difference decreases A drop phenomenon occurs, and the heat generation concentration phenomenon may occur due to the high calorific value per unit area on the contact surface, but the heat generation is concentrated by the conductive adhesive in the impregnated region 114 of the carbon fiber layer 111 coated with the graphene 112 This is resolved. At this time, it is preferable that the specific resistance of the conductive adhesive is lower than that of the carbon fiber layer 111 coated with the graphene 112 and higher than that of the metal electrode 112.

Specifically, the conductive adhesive is impregnated into the inside of the carbon fiber layer 111 coated with graphene 112 to coat the surface of the carbon fiber, and attach the coated surface to one surface of the metal electrode 112, thereby making the metal electrode ( 112) constitutes a form capable of conducting the applied voltage, thereby forming an intermediate resistance zone between the resistance of the metal electrode 112, which is the electrode part, and the resistance of the carbon fiber layer 111, which is the heating part, and generates heat due to a sudden voltage drop. Concentration can be minimized. That is, in the carbon fiber layer 111 coated with the graphene 112, the electrical resistance of the impregnated region 114 is lower than that of the non-impregnated region excluding the impregnated region 114, and the metal electrode 112 is electrically The resistance is lower than the electrical resistance of the impregnated region 114.

The metal electrode 112 transports electrons to a long distance under a slight voltage drop, and the conductive adhesive impregnated in the impregnating region 112 transfers electrons faster than the carbon fiber to the carbon fiber layer 111 coated with the graphene 112. It is moved to the inside, and the carbon fiber layer 111 coated with the graphene 112 uniformly receives electrons and operates as a heating unit. Thus, unlike the conventional planar heating element using carbon black, there is no need to make a separate layer between the metal electrode 113 and the carbon fiber layer 111 coated with the graphene 112 as a heating element, There is no need to use a silver paste with excellent conductivity.

The carbon fiber layer 111 serves as a heat generating unit, and may be made of a bundle including carbon fibers or a cloth including carbon fibers. The carbon fiber cloth may be formed in a cotton shape such as a nonwoven fabric containing carbon fiber, felt, woven fabric, or sheet. In addition, the carbon fiber cloth may be formed by arranging a plurality of carbon fiber bundles in parallel or perpendicular to the metal electrode 113 direction. In addition, the carbon fiber bundle may be expanded to a predetermined width to attach to the metal electrode 113 in a wider area, or may be expanded only at a portion in contact with the metal electrode 113.

Here, as the carbon fiber, not only PAN-based (polyacrylonitrile-based), pitch-based, rayon-based, but fibrous co-carbon-containing material may be used. These carbon fibers may have a one-dimensionally elongated structure, and of course there is no particular limitation on the fiber length of the carbon fibers.

When the fiber length of the carbon fiber is long, conductivity and strength are improved, whereas when the fiber length of the carbon fiber is too long, the dispersibility of the carbon fiber may be deteriorated. In addition, when the fiber length is too short, the bonding force between the fibers may decrease, resulting in poor shape stability. Therefore, it is necessary to use carbon fibers of an appropriate length, and the average fiber length may differ depending on the type of carbon fiber to be used and the fiber diameter. In addition, if the fiber diameter of the carbon fiber is too large, the pore size may be too large, and if the fiber diameter is too small, it may be difficult to bond by a binder due to poor workability, so that a carbon fiber suitable for direct average fiber can be used.

For example, as an example of a carbon fiber cloth, a binder is added using a chopped carbon fiber cut into a length of about 1 to 30 mm in the form of a non-woven fabric, and a carbon fiber non-woven fabric is manufactured through a wet-laid device. I can. At this time, the binder includes a urethane group, an epoxy group, a carboxyl group, a carbonyl group, an acrylic group, a hydroxy group, an ester group, an ether group, a vinyl acetate group, an amide group, an imide group, and a maleic acid group represented by polyvinylidene fluoride (PVdF). Organic binders or aqueous binders such as polyvinylpyrrolidone (PVP), polytetrafluoroethylene (PTEE), styrene butadiene rubber (SBR), carboxymethylcellulose (CMC) and polyvinyl alcohol (PVA) are selected according to the manufacturing purpose. It can be used, and the content can be determined in consideration of the content of the carbon fiber used and the thickness and conductivity of the carbon fiber cloth to be manufactured. At this time, cellulose, curdran, tamarind, gelatin, guar gum, pectin, LBG, carrageenan, konjac, alginic acid, arabic, gellan, xanthan, etc. can be added and used for the purpose of improving the viscosity to increase dispersion stability.

In the present invention, graphene 112 is used to compensate for the carbon fiber because a dense portion having a relatively high density and a dense portion having a low density are arbitrarily formed in the process. When the graphene 112 is mixed with the carbon fiber, the density is uniformly dispersed, so that it may have various heating characteristics.

The graphene 112 is a thin film composed of carbon atoms and having a thickness of one atom, and is a nanomaterial composed of carbon having an atomic number of 6, such as carbon nanotubes and fullerene. Graphene 112 has high physical and chemical stability. It conducts electricity more than 100 times better than copper, can move electrons more than 100 times faster than single crystal silicon, which is mainly used as a semiconductor, is 200 times stronger than steel, and 2 times more than diamond, which boasts the best thermal conductivity. High thermal conductivity. In addition, it has excellent elasticity and does not lose its electrical properties even when it is stretched or bent.

In addition, the graphene 112 is graphene (GP) or graphene oxide (GO) in an oxide state, or graphene (RFO) in a reduced state of the graphene oxide (GO) is used, 10~ It has a surface area of 3,000㎡/g and has an elastic modulus of 800 to 1,300 GPa and a tensile strength of 100 to 150 GPa.

In the present invention, the graphene 112 may be used in the form of a thin film or a liquid in order to be well mixed in the carbon fiber layer 111.

The metal electrode 113 may be made of a metal including copper, aluminum, silver, nickel, tin, or an alloy thereof. Also, the shape may be in the form of a ribbon or a line. The wire shape may be a copper wire or a silver-plated copper wire. Ribbon shape may be about 3 ~ 100μm thick.

The impregnated region 114 is formed by impregnating a conductive adhesive into the carbon fiber layer 111 coated with the graphene 112 and is attached to one surface of the metal electrode 113. In the case of the conductive adhesive impregnated in the carbon fiber layer 111 coated with the graphene 112 as the heating part and adhered to the metal electrode 112 as the electrode part, the resistivity level is higher than that of the metal electrode 113 and lower than the carbon fiber layer 111. It is an adhesive containing a conductive filler formulated to have. Specifically, the carbon fiber layer 111 coated with the graphene 112 according to the density, thickness, and porosity of the carbon fiber layer 111 coated with the graphene 112 made in the form of a nonwoven fabric, felt, sheet, etc. A conductive adhesive having a viscosity of 10 to 15,000 cps that can be sufficiently impregnated into the interior of the can be used.

Here, the conductive adhesive impregnated in a partial area of the carbon fiber layer 111 coated with the graphene 112 is 1 to 85% by weight of a solvent, 0.1 to 15% by weight of a polymer binder, and 1 to 55% by weight of a conductive filler. It may include. The amount of use of each composition is the range of the specific resistance of the conductive adhesive in consideration of the resistance of the carbon fiber layer 111 coated with the graphene 112 and the metal electrode 113, and the carbon fiber layer 111 coated with the graphene 112 Considering the density and porosity, it may be used to suit the purpose such as viscosity. In the case of the polymer binder, at least one selected from acrylate resin, epoxy resin, polyester, polyurethane, polycarbonate, polyamide, polyimide, and polyether may be included. In addition, as the conductive filler, carbon nanotubes, carbon black, pulverized carbon fibers, and metal powders such as gold, silver, and copper may be used. In addition, organic solvents such as water, alcohol, acetone, N-methylpyrrolidone (NMP), ethylene glycol, propylene glycol, and glycerin may be used as the solvent.

In addition, for excellent electrical performance and high impregnation rate, a single-walled or multi-walled carbon nanotube may be mixed with a conductive adhesive. For example, the appropriate mixing amount of the carbon nanotubes may be 7% by weight or more of the solid content after drying the conductive adhesive solution at 250 degrees.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You can understand. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting.

Claims (4)

In the graphene carbon fiber sheet cover for automobiles having a heating function,
The seat cover,
Separable heat transfer sheet made of graphene-coated carbon fiber;
The graphene carbon fiber consists of a connection and a socket part connected with wires so that electricity generated from the battery of the vehicle can be supplied,
The separable heat transfer sheet,
A carbon fiber layer including a plurality of carbon fibers;
Graphene coated on the carbon fiber layer to uniformly disperse a plurality of carbon fiber densities to improve electrical conductivity and heat generation; And
Including at least one metal electrode attached to one surface of the graphene-coated carbon fiber layer
Graphene carbon fiber seat cover for automobiles with heating function.
The method of claim 1,
In the heat transfer sheet, a plurality of copper plates are attached to two graphene-coated carbon fibers at regular intervals, and wires are respectively connected to one end of the copper plate, and the connected graphene-coated carbon fibers, copper plates and wires are made of synthetic resin cover Coating, characterized in that the wires protruding out of the cover are collected at the connection part and connected to the socket part.
Graphene carbon fiber seat cover for automobiles with heating function.
The method of claim 1,
The heat transfer sheet,
Graphene composed of carbon atoms and coated on the carbon fiber layer, graphene (GP) or graphene oxide (GO) in an oxide state, or graphene (RFO) in a reduced state of the graphene oxide (GO); And
The graphene is attached to one surface of the coated carbon fiber layer, including a metal electrode made of a metal including at least copper, aluminum, silver, nickel, tin, or an alloy thereof
Graphene carbon fiber seat cover for automobiles with heating function.
The method of claim 1,
The heat transfer sheet,
It characterized in that it further comprises a switch for turning on / off the power and a temperature control device for controlling the temperature of the heat transfer sheet.
Graphene carbon fiber seat cover for automobiles with heating function.

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