Heating coating product of automotive trim
By integrating graphene film and thin electrodes into the interior of new energy vehicles, the integration difficulties and electromagnetic radiation problems of traditional resistance wire heating have been solved, achieving efficient, energy-saving, and comfortable interior radiant heating and improving the passenger experience.
Patent Information
- Application Number
- CN202520110847.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing interior heating products for new energy vehicles suffer from problems such as difficulty in integrating traditional resistance wires, high production costs, significant electromagnetic radiation hazards, and inability to achieve large-area radiant heating.
Using graphene film as a heating carrier, combined with thin electrodes, it is integrated into the interior structure. Through a combination of contact and radiation heating methods, uniform thickness and large-area heating are achieved.
It improves electrothermal conversion efficiency, reduces energy consumption, enhances passenger comfort, avoids electromagnetic radiation hazards, and provides a wider heating coverage and a better appearance.
Smart Images
Figure CN223631487U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automotive interior products, more specifically, the utility model relates to a heating coated product of automotive interior. BACKGROUND
[0002] With the development of new energy vehicles, passengers are increasingly pursuing energy saving and comfort of the car, and the weather in the north is cold, and the use of air conditioning for heating in winter will seriously affect the cruising range of the car, so the cruising range anxiety problem of new energy vehicles is concerned.
[0003] Most of the existing new energy vehicles use PTC or heat pump air conditioning for cabin air heating. After investigation, the overall impact on cruising range under the condition of using PTC or heat pump air conditioning for heating in winter in the north is 30%-50%.
[0004] Based on the above problems, by learning from the heating mode of the floor heating in the north, heating function can be integrated on the automotive interior product. Due to the low heat conversion of the air conditioner and the large air circulation space in the car, the use of contact heat conduction + radiation heat conduction type automotive interior heating can improve the electric heat conversion efficiency and conduction efficiency, thereby realizing energy saving. In addition, the current air conditioning heating needs the whole cabin air to be heated before the passengers can feel warm, but by using interior heating, customized area division can be achieved, such as only the heating product around the main driver is turned on in the case of only the main driver, which can meet the heating needs of the driver. In this case, compared with air conditioning heating, about 90% of energy can be saved, which greatly relieves the cruising range anxiety problem. In addition, this heating method will not have the blowing feeling and noise, and the driving experience will be more comfortable.
[0005] At present, seat heating and steering wheel heating are mature products, but both are contact heating, and cannot completely replace air conditioning when both are working, so it is necessary to supplement radiation heating, such as IP, DP, middle channel and armrest area, which can increase heating function. The radiation of heat from the heating product to the driver and passenger can completely replace the air conditioner.
[0006] Interior heating is a brand new product, and there is no application on the market at present. The main technical barriers are:
[0007] 1. It is difficult to integrate traditional resistance wire products with interior coated products. Since the resistance wire has a certain wire diameter, there will be marks on the surface of the product. If it is embedded in the structural part, the production cost will increase, and in the case of single layer leather coating, the resistance wire marks will still be present.
[0008] 2. Traditional resistance wire heating is not suitable for large area radiation heating. Too large current or too close arrangement will have the risk of melting, but too small current and too loose arrangement cannot achieve the effect of radiation.
[0009] 3. The traditional resistance wire heating all uses alloy wire, and large area use will increase electromagnetic radiation hazard.
[0010] Therefore, it is urgent to develop an interior heating product which can avoid or solve the above problems. Invention content
[0011] The utility model discloses a heating cladding product of automobile interior, which is designed as a flexible product with uniform thickness and light weight, and the heating product is integrated into the interior cladding product to realize the interior radiation heating function.
[0012] The utility model provides a technical scheme, which is characterized by comprising:
[0013] A heating cladding product of automobile interior, comprising:
[0014] a heating product layer attached to the inner side of the framework layer; and
[0015] a skin layer attached to the inner side of the heating product layer.
[0016] Preferably, the heating product layer is integrated with an electrode, and the electrode is connected with a power line.
[0017] Preferably, the framework layer is a treated interior structural member.
[0018] Preferably, the heating product layer comprises:
[0019] a first encapsulating material layer, an electrode layer, a graphene film and a second encapsulating material layer.
[0020] Preferably, the graphene film is close to the skin layer.
[0021] Preferably, the utility model further comprises:
[0022] a foaming layer arranged between the heating product layer and the framework layer.
[0023] a heat insulation layer arranged between the foaming layer and the framework layer or between the heating product layer and the framework layer.
[0024] Preferably, the skin layer is made of leather, microfiber leather, PVC or PU.
[0025] Preferably, the heating product layer and the skin layer are attached by water-based glue, hot melt glue, solvent glue, PE glue film or PUR glue film.
[0026] Preferably, the heating product layer and the framework layer or the heating product layer and the foaming layer are attached by water-based glue, hot melt glue, solvent glue, PE glue film or PUR glue film.
[0027] Preferably, the material of the skeleton layer is PP, PA6, ABS, PP-TD20, PP-EPDM-TD20 or PC / ABS.
[0028] Preferably, the electrode is printed on the graphene film by silver paste or pasted on the graphene film by copper foil.
[0029] Preferably, the heating product further comprises:
[0030] A temperature sensor is arranged on the graphene film for monitoring the heating temperature.
[0031] The heating cladding product for automobile interior provided by the utility model has the advantages that graphene is used as a carrier to increase the heating area of the heating product, the graphene has super strong heat conduction characteristics and certain electrical conductivity, the graphene is used as a low conductor to greatly improve the electric heating conversion efficiency and increase the heating area.
[0032] The heating cladding product for automobile interior provided by the utility model has the advantages that graphene is used as a carrier to increase the heating area of the heating product, the graphene has super strong heat conduction characteristics and certain electrical conductivity, the graphene is used as a low conductor to greatly improve the electric heating conversion efficiency and increase the heating area. BRIEF DESCRIPTION OF DRAWINGS
[0033] Figure 1 The utility model discloses a heating cladding product for automobile interior.
[0034] Figure 2 The utility model discloses a heating cladding product for automobile interior.
[0035] Figure 3 The utility model discloses a heating cladding product for automobile interior. DETAILED DESCRIPTION
[0036] The utility model will be further explained in detail in connection with the drawings, so that the person skilled in the art can implement according to the description.
[0037] As shown in Figure 1 The utility model provides a heating cladding product for automobile interior, which comprises from outside to inside in sequence: a skeleton layer 110, a heat insulation layer 120, a foaming layer 130, a first adhesive layer 140, a heating product layer 150, a second adhesive layer 160 and a skin layer 170.
[0038] The skeleton layer 110 is an interior structure member after surface treatment, and in the embodiment, the thickness of other layers is considered when designing the skeleton layer 110, and corresponding avoidance is made, so that the overall thickness of the automobile interior structure member meets the requirements.
[0039] The heating product layer 150 comprises a first encapsulating material layer, an electrode layer, a graphene film, and a second encapsulating material layer, and the graphene film is close to the skin layer 170.
[0040] In the embodiment, the skeleton layer 110, the first adhesive layer 140, the heating product layer 150, the second adhesive layer 160, and the skin layer 170 are necessary structure layers, the foaming layer 130 is added according to the product design requirement, such as the position of the armrest, to increase the foaming to improve the soft touch feeling, and the foaming also has a certain heat preservation effect; the heat insulation layer 120 is generally integrated by spraying heat insulation paint, heat insulation cloth, or heat insulation cotton, and the heat insulation layer 120 can reduce the heat transfer to the inside of the interior product structure, because the temperature of the heating source needs to be very high, generally above 70℃, the structure has the risk of deformation, and after the heat insulation layer 120 is added, the heat dissipation is reduced, the heat is emitted to the leather side, and thus the heat is better radiated to the passenger area.
[0041] In the embodiment, the skeleton layer 110 is generally made of PP, PA6, ABS, PP-TD20, PP-EPDM-TD20, PC / ABS, etc., and generally needs to be subjected to flame or plasma treatment to make the dyne value > 38.
[0042] In the embodiment, the first adhesive layer 140 can be integrated into the product by spraying water-based glue, hot melt glue, or solvent glue, or TPU hot melt glue can be first integrated into the heating product layer 150 or the skeleton layer 110.
[0043] The second adhesive layer 160 is generally made of water-based glue, and can also be made of hot melt glue, solvent glue, adhesive film, etc., and the adhesive film is generally PE, PUR, etc.
[0044] In the embodiment, in order to ensure the peeling force and appearance effect of the product, the plastic substrate and other adhesive substrates need to be subjected to surface treatment, and the dyne value is > 38.
[0045] In the embodiment, the skin layer 170 can be real leather, microfiber leather, PVC, PU, etc., and can be single leather, composite leather covered with foam, foaming, or mesh, or other covering skin, and as an optimization, the skin with high thermal conductivity can improve the heating efficiency of the product.
[0046] The graphene film in the heating product layer 150 is prepared by the following process:
[0047] 1. Graphene heating film preparation:
[0048] According to different design requirements, the graphene paste with composite design square resistance is selected, coated on the PET film to make the graphene heating film, and the graphene heating film is used as the heat conduction film of the heating product to cover the whole heating area. Due to the low conductivity and high thermal conductivity of the graphene paste, large-area heating can be realized after power-on. Compared with resistance wire heating, the effective heating area is larger, and the heat is more uniform.
[0049] 2. Electrode manufacturing:
[0050] As shown in Figure 2 , the electrode circuit is manufactured by adopting the scheme of silver paste printing or copper foil pasting. The electrode can be directly integrated on the graphene heating film and in contact with the heating film to realize current conduction and heat conduction. Compared with resistance wire heating, the electrode is lighter and thinner, with a thickness of only 10-50 μm. While realizing the conductivity, the appearance of the coating can be ensured without obvious marks.
[0051] 3. Graphene heating film packaging:
[0052] The heating film manufactured according to the above steps needs to be waterproof and static protected to meet the requirements of passenger cars. Therefore, a PET film, a PI film, a non-woven fabric or a spring fabric with waterproof and anti-static functions is used to package the heating film product on both sides. The packaging material needs to meet the requirements of the automotive interior flame retardant performance, and the tensile and hardness need to meet the packaging requirements, so that wrinkles and damage do not occur during the packaging process. The outline of the heating cloth needs to be designed according to the product shape, and the cutout treatment is performed at the position with large curvature. Compared with resistance wire heating, the overall thickness of the packaged material is uniform and consistent, generally <0.5 mm, which solves the problem of appearance marks and is more suitable for coating products.
[0053] 4. Electrode manufacturing:
[0054] The graphene heating film needs to be heated after power-on. Therefore, the positive and negative electrode connection areas are reserved during packaging. The power supply line is connected to the electrode area of the heating product through conductive adhesive bonding, copper foil pasting, terminal riveting and FPC soft wire connection. In order to ensure the appearance effect of the coating, the power supply connection area needs to be arranged outside the product coating edge.
[0055] 5. NTC arrangement:
[0056] In order to realize heating regulation, NTC needs to be arranged in the heating product for temperature monitoring. In order to ensure the appearance of the coating, the NTC needs to be arranged outside the product coating edge, and the graphene film also needs to be reserved at the NTC contact position, so as to realize more accurate temperature monitoring and control function. In this embodiment, the NTC and the power supply line can be integrated in the form of soft wire.
[0057] The processing process of the heating and coating product of the automotive interior is as follows:
[0058] First, the skeleton layer and the heating product layer are sprayed with glue towards the side of the skeleton layer, and then enter the drying tunnel to dry the moisture in the glue; the glue is activated by hot air to coat the heating product layer onto the skeleton layer; the surface of the coated product and the back of the coating skin are sprayed with glue again, and then enter the drying tunnel for drying, and then the normal skin coating process is carried out, and after completion, it is placed in a pressure holding tool for heating, pressure holding and cooling and shaping, to ensure the bonding strength and good appearance effect of the product.
[0059] As shown in Figure 3 It should be noted that the heating product has a wire harness and a terminal, and the terminal needs to be hidden to the back of the product to prevent glue from entering the terminal and affecting the circuit conduction; the wire harness terminal avoiding groove needs to be made in the pressure holding tool during pressure holding to prevent the wire harness and the terminal from being broken or leaving marks on the surface of the product.
[0060] In actual application, according to actual vehicle scene requirements, the heating controller can be integrated into the door panel switch, steering wheel switch and seat adjustment switch, a heating control module is added, and the wire harness terminal of the heating product layer is connected to the corresponding controller during assembly, and the wire harness is fixed to prevent falling off or abnormal noise caused by movement.
[0061] The heating coated product of the automobile interior provided by the utility model increases the heating area of the heating product by taking graphene as a carrier, because graphene has super strong heat conduction characteristics and certain electrical conductivity, taking it as a low conductor can greatly improve the electric heating conversion efficiency and increase the heating area, and the thin and light electrode is integrated with it to ensure the thickness uniformity of the heating product, and the flexible bending and stretching solve the coating appearance problem, have the advantages of large heating area, wide coverage, good appearance, realize large-area interior radiation heating function, and this heating method is more energy-saving, comfortable and healthy, because it does not contain metal, there is no ionizing radiation, and the far infrared light wave released by graphene heating can promote human metabolism and has a certain physiotherapy effect.
[0062] Although the embodiments of the utility model have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and they can be fully applied to various fields suitable for the utility model, and other modifications can be easily realized by those skilled in the art, therefore, the utility model is not limited to specific details and the figures shown and described herein without departing from the general concept defined by the claims and the equivalent scope.
Claims
1. A heating-coated product for automotive interior, characterized by, Comprise: a heating product layer, which is bonded inside the framework layer; and a skin layer, which is bonded inside the heating product layer; The heating product layer comprises: a first encapsulation material layer, an electrode layer, a graphene film and a second encapsulation material layer; Wherein, the electrode is integrated on the heating product layer, and the electrode is connected with the power line, and the graphene film is close to the skin layer.
2. The heating-coated product for automotive interior according to claim 1, wherein The framework layer is a treated interior trim structure.
3. The heating-coated product for automotive interior according to claim 2, wherein Also comprise: a foaming layer, which is arranged between the heating product layer and the framework layer; a thermal insulation layer, which is arranged between the foaming layer and the framework layer or between the heating product layer and the framework layer.
4. The heating-coated product for automotive interior according to claim 3, wherein The material of the skin layer is leather, microfiber leather, PVC or PU.
5. The heating-coated product for automotive interior according to claim 4, wherein The heating product layer and the skin layer are bonded by water-based glue, hot melt glue, solvent glue, PE glue film or PUR glue film.
6. The heating-coated product for automotive interior according to claim 5, wherein The heating product layer and the framework layer or the heating product layer and the foaming layer are bonded by water-based glue, hot melt glue, solvent glue, PE glue film or PUR glue film.
7. The heating-coated product for automotive interior according to claim 6, wherein The material of the framework layer is PP, PA6, ABS, PP-TD20, PP-EPDM-TD20 or PC / ABS.
8. The heating-coated product for automotive interior according to claim 7, wherein The electrode is printed on the graphene film by silver paste or pasted by copper foil.
9. The heating-coated product for automotive interior according to claim 8, wherein Also comprise: a temperature sensor, which is arranged on the graphene film, for monitoring the heating temperature.