Graphene heating pad

Abstract

The utility model relates to a graphene heating pad, and belongs to the technical field of graphene automobile heating seat pads. The graphene heating pad comprises a graphene heating film layer, the graphene heating film layer comprises a graphene heating body with two free ends, a plurality of ventilation holes are formed in the periphery of the graphene heating body, the graphene heating body is arranged in a snake shape to form a snake-shaped heating wire, and the snake-shaped heating wire is arranged to avoid the ventilation holes. Porous rivets are arranged at the two free ends of the graphene heating body, the wiring harness is electrically connected with the graphene heating body, and the wiring harness is led out through the porous rivets and is communicated with a power supply. The heating area of the graphene heating body is large and uniform, the graphene heating body is coated with the upper protective film layer and the lower protective film layer, dust prevention, water prevention, friction prevention, external force prevention and the like can be achieved, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of graphene automotive heated seat cushion technology, and in particular to a graphene heating pad. Background Technology

[0002] With the continuous improvement of living standards, many car seats are now equipped with heating functions to enhance comfort. Based on performance and health considerations, many graphene heating pads have emerged. However, traditional graphene heating pads have the following drawbacks: A. Printed graphene heating pads: These use graphene paste to screen print the graphene heating layer and silver paste electrode layer onto PET or PI film, with wires leading out. The disadvantages are as follows: 1. Due to the printing method, the graphene heating layer has poor resistance uniformity, resulting in uneven heating; 2. With prolonged use, mechanical forces cause the graphene layer to crack, increasing resistance and reducing power; 3. The silver paste electrodes require high current, necessitating wider silver paste lines, reducing the heating area and increasing material costs. Furthermore, the presence of silver paste resistance leads to increased end resistance, increased voltage drop, and decreased heating temperature; 4. Because the silver paste is printed, there is heating and attenuation at the wire lead-out points; 5. The heating pad experiences greater stress at the ribs, and prolonged mechanical friction causes the silver paste wires to break; 6. High printing scrap rate, complex process, and high cost. B. PU film graphene heating pad: Uses a planar PU film with a rectangular structure, conductive copper foil arranged on both sides, a protective layer is pasted, and then the wires are led out. Its disadvantages are as follows: 1. Due to the planar structure and parallel arrangement of electrode strips, the heating shape can only be a regular shape and cannot completely match the structure on the seat; 2. The electrodes are conductive copper strips, and there is contact resistance at the contact surface between the conductive adhesive and graphene, resulting in heating. Moreover, with prolonged use, the conductive adhesive hardens and attenuates, eventually leading to contact failure; 3. After pasting the conductive copper strip, the electrode strip needs to be close to facilitate wire lead-out, so the copper strip needs to be turned before approaching. Poor connection at the turning point often causes problems; 4. The conductive copper strip has poor adhesion; 5. The conductive copper strip is expensive. C. Laminated graphene heating pad: Graphene powder is laminated with adhesive to form a graphene heating element. A protective layer is then attached, and wires are led out. Its disadvantages are as follows: 1. Extremely high cost; 2. Poor resistance uniformity; 3. With prolonged use, mechanical forces cause graphene delamination, increasing resistance and reducing power; 4. The heating pad experiences significant stress at the ribs, and prolonged mechanical friction can cause the graphene wires to break.

[0003] In view of the above, there is an urgent need to design a graphene heating pad that is stable in performance, low in material cost, simple in process and high in production efficiency. Utility Model Content

[0004] In view of this, this application provides a graphene heating pad to solve the technical problems mentioned in the background art.

[0005] This application provides a graphene heating pad, which includes a graphene heating film layer. The graphene heating film layer includes a graphene heating element with two free ends. Several ventilation holes are arranged around the graphene heating element. The graphene heating element is arranged in a serpentine pattern to form a serpentine heating wire, which avoids the ventilation holes. Multiple-hole rivets are provided on both free ends of the graphene heating element. A wire harness is electrically connected to the graphene heating element, and the wire harness is led out through the multiple-hole rivets and connected to a power source. Specifically, the multiple-hole rivets are made of metal.

[0006] Preferably, the two free ends of the graphene heating element are the beginning and end of the wire lead-out, respectively, with a slit between them to form a wire connection port. The wire connection port and the rivet are bonded and protected with adhesive blocks. Specifically, the adhesive blocks are low-pressure injection molded blocks to protect the exposed rivets and wire bundle.

[0007] Preferably, the graphene heating pad further includes an upper protective film layer and a lower protective film layer. The upper protective film layer is disposed on the upper surface of the graphene heating film layer, and the lower protective film layer is disposed on the lower surface of the graphene heating film layer. The upper protective film layer, the graphene heating film layer, and the lower protective film layer are connected and fixed sequentially from top to bottom.

[0008] Preferably, the upper protective film layer and the lower protective film layer are connected and fixed to the graphene heating film layer by means of spray adhesive hot pressing, high frequency welding or film coating hot pressing, respectively.

[0009] Preferably, the graphene heating pad further includes an upper adhesive film layer and a lower adhesive film layer. The upper adhesive film layer is disposed between the upper protective film layer and the graphene heating film layer, and the lower adhesive film layer is disposed between the graphene heating film layer and the lower protective film layer. The upper protective film layer, the upper adhesive film layer, the graphene heating film layer, the lower adhesive film layer, and the lower protective film layer are bonded and fixed sequentially from top to bottom.

[0010] Preferably, the angle of inclination of the curved section of the serpentine heating wire relative to the horizontal plane is set to 45°, and the bends of the curved section are rounded.

[0011] Preferably, the multi-hole rivet is a three-hole rivet or a four-hole rivet, wherein the three-hole rivet is composed of a bottom rivet with a stretching protrusion and a top rivet with a connecting hole, and the bottom rivet with the stretching protrusion and the top rivet with the connecting hole are riveted and formed.

[0012] Preferably, the graphene heating element of the graphene heating film layer is made of a graphene-polyurethane hybrid material.

[0013] Compared with the prior art, this application has the following advantages:

[0014] (1) The graphene heating layer of this application is cut, the protective layer is composited, the wire is riveted, and the glue is injected for protection; the material cost of the graphene heating pad of this application is low: a single graphene heating layer; the graphene heating pad of this application has stable performance: it is resistant to bending, the riveted parts are reliable, and the heating is uniform and stable.

[0015] (2) The graphene heating body of this application has a large and uniform heating area. It is covered with an upper protective film layer and a lower protective film layer, which can prevent dust, water, abrasion, and external force, thus enhancing its service life. Both free ends of the graphene heating body are provided with three-hole rivets for riveting. At the same time, low-pressure injection molding blocks protect it. The rivet contact area is large and the strength is high, which prevents contact heating. The block protection can effectively alleviate the damage from external forces. Since graphene is used for heating, the graphene heating pad of this application also has the advantages of fast heating, low energy consumption, bending resistance, thin thickness, large heating area, and uniform heating. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the graphene heating pad in this application;

[0018] Figure 2 This is a schematic diagram illustrating the graphene arrangement of the graphene heating pad in this application.

[0019] Figure 3 This is a schematic diagram of the graphene wire lead-out of the graphene heating pad in this application;

[0020] Figure 4 This is a schematic diagram of the porous rivet bottom layer of the graphene heating pad in this application;

[0021] Figure 5 This is a schematic diagram of the upper layer of the porous rivet in the graphene heating pad of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Upper protective layer; 2. Upper adhesive layer; 3. Graphene heating layer; 4. Lower adhesive layer; 5. Lower protective layer; 6. Ventilation hole; 7. Wire connection port; 8. Adhesive block; 9. Wire harness; 10. Snake-shaped heating wire; 11. Wire lead-out end; 12. Wire lead-out end. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0026] Secondly, it should be noted that in the description of this application, the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0027] Example 1

[0028] like Figure 1-5 As shown, this application embodiment provides a graphene heating pad for use in automotive heated seat cushions. The graphene heating pad includes a graphene heating film layer 3, which includes a graphene heating element with two free ends. Several ventilation holes 6 are arranged around the graphene heating element. The graphene heating element is arranged in a serpentine layout to form a serpentine heating wire 10, which avoids the ventilation holes 6. Three-hole rivets are provided on both free ends of the graphene heating element. A wire harness 9 is electrically connected to the graphene heating element and is led out and connected to a power source through the three-hole rivets.

[0029] The three-hole rivet consists of a bottom rivet with a stretching protrusion and a top rivet with a connecting hole, which are riveted together. To address the strength and lifespan issues at the junction of the wire harness 9 and the graphene heating film layer 3, both the wire outlet head end 11 and the wire outlet tail end 12 are equipped with a three-hole rivet structure.

[0030] When arranging the serpentine heating wire 10, the position of the ventilation hole 6 can be reserved and matched according to the actual requirements of the ventilation hole 6.

[0031] Specifically, the two free ends of the graphene heating element are the wire lead-out end 11 and the wire lead-out end 12, respectively. A slit is left between the wire lead-out end 11 and the wire lead-out end 12 to form a wire connection port 7. The wire connection port 7 and the rivet are bonded and protected with a glue block 8. More specifically, the glue block 8 is a low-pressure injection molded glue block, which serves to protect the exposed three-hole rivet and the wire harness 9.

[0032] In one specific embodiment, to protect the strength and waterproof performance of the crimped joint, TPR adhesive blocks are used to protect the wire connection port 7 and the three-hole rivet. The material of the adhesive block 8 can also be silicone, rubber, hot melt adhesive, or other forms of protective adhesive, and it is implemented by low-pressure injection molding. This embodiment does not limit this.

[0033] Specifically, the angle of inclination of the curved section of the serpentine heating wire 10 relative to the horizontal plane is set to 45°, and the bends of the curved section are rounded.

[0034] In one specific embodiment, the graphene heating film layer 3 is a whole sheet structure with a serpentine design structure, forming a wide serpentine heating line 10, and the heating efficiency is above 90%; the inclination angle of the curved section of the serpentine heating line 10 relative to the horizontal plane is set to 45°, and the corners of the curved section are rounded, which can effectively alleviate the mechanical influence on the performance of the graphene heating film layer 3.

[0035] Specifically, the graphene heating element of the graphene heating film layer 3 is made of a graphene-polyurethane hybrid material.

[0036] In one specific embodiment, the graphene heating film layer 3 is made of roll-to-roll graphene polyurethane film, and the heating shape is achieved by laser cutting or die-cutting, which is a simple process. It should be noted that laser cutting is used for small quantities, while die-cutting is performed by fabricating die-cutting fixtures and using a die-cutting machine, which ensures precise alignment and high yield; however, this application does not limit this aspect.

[0037] Example 2

[0038] This embodiment can be referred to in Embodiment 1, except that the graphene heating pad also includes an upper protective film layer 1 and a lower protective film layer 5. The upper protective film layer 1 is disposed on the upper surface of the graphene heating film layer 3, and the lower protective film layer 5 is disposed on the lower surface of the graphene heating film layer 3. The upper protective film layer 1, the graphene heating film layer 3 and the lower protective film layer 5 are connected and fixed sequentially from top to bottom.

[0039] In one specific embodiment, the upper protective film layer 1 and the lower protective film layer 5 can be made of different materials such as cloth, fabric, or non-woven fabric. The upper protective film layer 1 and the lower protective film layer 5 are integrated and protected by hot pressing with adhesive spraying, welding with high frequency welding, or hot pressing with protective film coating.

[0040] Example 3

[0041] This embodiment can be referred to in embodiment 2, the difference being that the graphene heating pad further includes an upper adhesive film layer 2 and a lower adhesive film layer 4. The upper adhesive film layer 2 is disposed between the upper protective film layer 1 and the graphene heating film layer 3, and the lower adhesive film layer 4 is disposed between the graphene heating film layer 3 and the lower protective film layer 5. The upper protective film layer 1, the upper adhesive film layer 2, the graphene heating film layer 3, the lower adhesive film layer 4, and the lower protective film layer 5 are glued and fixed sequentially from top to bottom.

[0042] For example, the materials of the upper adhesive film layer 2 and the lower adhesive film layer 4 can specifically be adhesive materials such as hot melt adhesive, double-sided adhesive, thermoplastic adhesive or thermosetting adhesive.

[0043] Example 4

[0044] This embodiment can be referred to in Embodiment 1, except that the three-hole rivet is replaced with a four-hole rivet. In order to address the strength and lifespan issues at the junction of the wire harness 9 and the graphene heating film layer 3, both the wire outlet head end 11 and the wire outlet tail end 12 are equipped with a four-hole rivet structure.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A graphene heating pad, characterized in that, The graphene heating pad includes a graphene heating film layer (3), which includes a graphene heating element with two free ends. Several ventilation holes (6) are arranged around the graphene heating element. The graphene heating element is arranged in a serpentine layout to form a serpentine heating wire (10). The serpentine heating wire (10) avoids the ventilation holes (6). Multiple-hole rivets are provided on both free ends of the graphene heating element. The wire harness (9) is electrically connected to the graphene heating element. The wire harness (9) is led out through the multiple-hole rivets and connected to the power supply.

2. The graphene heating pad according to claim 1, characterized in that, The two free ends of the graphene heating element are the wire outlet head end (11) and the wire outlet tail end (12), respectively. A slit is left between the wire outlet head end (11) and the wire outlet tail end (12) to form a wire connection port (7). The wire connection port (7) and the rivet are bonded and protected with adhesive block (8).

3. The graphene heating pad according to claim 2, characterized in that, The graphene heating pad also includes an upper protective film layer (1) and a lower protective film layer (5). The upper protective film layer (1) is disposed on the upper surface of the graphene heating film layer (3), and the lower protective film layer (5) is disposed on the lower surface of the graphene heating film layer (3). The upper protective film layer (1), the graphene heating film layer (3), and the lower protective film layer (5) are connected and fixed sequentially from top to bottom.

4. The graphene heating pad according to claim 3, characterized in that, The upper protective film layer (1) and the lower protective film layer (5) are connected and fixed to the graphene heating film layer (3) by means of spray adhesive hot pressing, high frequency welding or film coating hot pressing.

5. The graphene heating pad according to claim 3, characterized in that, The graphene heating pad also includes an upper adhesive film layer (2) and a lower adhesive film layer (4). The upper adhesive film layer (2) is disposed between the upper protective film layer (1) and the graphene heating film layer (3). The lower adhesive film layer (4) is disposed between the graphene heating film layer (3) and the lower protective film layer (5). The upper protective film layer (1), the upper adhesive film layer (2), the graphene heating film layer (3), the lower adhesive film layer (4), and the lower protective film layer (5) are bonded and fixed from top to bottom.

6. The graphene heating pad according to claim 1, characterized in that, The angle of inclination of the curved section of the serpentine heating wire (10) relative to the horizontal plane is set to 45°, and the bend of the curved section is rounded.

7. The graphene heating pad according to claim 5, characterized in that, The multi-hole rivet is a three-hole rivet or a four-hole rivet, wherein the three-hole rivet is composed of a bottom rivet with a stretching protrusion and a top rivet with a connecting hole, and the bottom rivet with the stretching protrusion and the top rivet with the connecting hole are riveted and formed.

8. The graphene heating pad according to claim 1, characterized in that, The graphene heating element of the graphene heating film layer (3) is made of graphene polyurethane composite material.

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