Flexible material arrangement conductive current collector tensile strengthening structure of automobile seat heating cushion

Abstract

The utility model relates to a flexible material arrangement conductive current collector tensile strengthening structure of an automobile seat heating pad. The flexible material arrangement conductive current collector tensile strengthening structure comprises a PET layer, a conductive current collector layer, a mylar layer and a graphene heating layer from top to bottom. Wherein the PET layer, the conductive current collector layer and the mylar layer are of an integrated composite structure; the mylar layer below the conductive current collector layer is bonded and connected with the graphene heating layer by means of conductive adhesive; the graphene heating layer is a core heating component of the automobile seat heating cushion; the conductive current collector layer adopts a gradient composite structure, and sequentially comprises a conductive layer, a carbon nanotube enhancement layer and a polyimide substrate layer from the center layer to the edge layer; wherein the carbon nanotubes of the carbon nanotube enhancement layer are arranged in a 45-degree cross manner, and the carbon nanotubes and the mylar layer form a mechanical interlocking structure. The structure provided by the utility model has greatly improved tensile and corrosion resistance, is not easy to damage, and prolongs the service life of the automobile seat heating cushion.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of seat heating pad, especially relates to a flexible material arrangement conductive current collector tensile enhancement structure of soft automobile seat heating pad. BACKGROUND

[0002] The seat heating cushion is an electric heating pad, which is mainly used for providing heating function for the automobile seat to improve the comfort degree when driving in winter.

[0003] The existing automobile seat heating pad is damaged due to repeated bending and extrusion in the use process due to the special use environment. For example, the heating material and the conductive assembly of the heating material are broken due to vibration and bending at the crimping position, which leads to open circuit or poor contact; it is easy to corrode in a humid environment, which leads to the decrease of the conductive performance. UTILITY MODEL CONTENTS

[0004] (I) technical problem to be solved

[0005] In view of the existing technical problems, the utility model provides a flexible material arrangement conductive current collector tensile enhancement structure of soft automobile seat heating pad.

[0006] (II) technical scheme

[0007] In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises:

[0008] A flexible material arrangement conductive current collector tensile enhancement structure of automobile seat heating pad comprises PET layer, conductive current collector layer, Mylar layer and graphene heating layer from top to bottom;

[0009] The PET layer, the conductive current collector layer and the Mylar layer are an integral composite structure;

[0010] The Mylar layer under the conductive current collector layer is bonded and connected with the graphene heating layer by means of conductive glue;

[0011] The graphene heating layer is the core heating component of the automobile seat heating pad;

[0012] The conductive current collector layer adopts a gradient composite structure, and the center layer is sequentially the conductive layer, the carbon nanotube reinforcing layer and the polyimide base layer from the edge layer;

[0013] The carbon nanotube reinforcing layer is arranged in 45° cross arrangement, and the mechanical interlocking structure is formed with the Mylar layer.

[0014] Preferably, the bottom of the conductive current collector layer has a rough structure;

[0015] The precision of the rough structure is 42-220 mu m2;

[0016] The rough structure can be matched with the Mylar layer;

[0017] The conductive current collector layer is connected with the Mylar layer by means of the rough structure.

[0018] Preferably, the rough structure is subdivided into a main rough area and an auxiliary rough area;

[0019] The area ratio of the main rough area is 60-75%;

[0020] The area ratio of the auxiliary rough area is 25-40%;

[0021] The main rough area and the auxiliary rough area are provided with a gradient surface energy treatment layer.

[0022] Preferably, the main rough area is a pyramid array structure;

[0023] The base side length of the pyramid is 8-12 mu m, and the cone angle is 60 degrees;

[0024] The auxiliary rough area is a honeycomb micropore structure;

[0025] The honeycomb micropore structure has a pore size of 2-4 mu m and a depth-width ratio of 1:1.5.

[0026] Preferably, the thickness of the conductive layer is 4-12 mu m.

[0027] Preferably, a plasma activation layer, a microcapsule bonding layer and a three-dimensional heat conduction network are sequentially added between the Mylar layer and the graphene heating layer.

[0028] Preferably, the three-dimensional heat conduction network is an aluminum oxide nanowire / boron nitride sheet composite structure;

[0029] The Mylar layer is a polyimide layer.

[0030] Preferably, the thickness of the PET layer is 3-5 mu m;

[0031] The thickness of the conductive current collector layer is 5-14 mu m;

[0032] The thickness of the Mylar layer is 1-1.5 mu m.

[0033] (Three) beneficial effects

[0034] The beneficial effects of the utility model are:

[0035] The PET layer not only protects the conductive current collector from oxidation and corrosion, but also greatly increases the tensile strength of the protective conductive current collector layer;

[0036] The Mylar layer or the polyimide layer can protect the conductive current collector and is integrally compounded with the PET layer to form a material, further improving the structural strength, so that the overall product can guarantee the service life in the special environment of the automobile seat heating pad, is not easy to damage, avoids bending and breaking, and the problem of reduced conductive performance.

[0037] The core structure of the automobile seat heating pad formed by the combination of the PET layer, the conductive current collector layer, the Mylar layer and the graphene heating layer has greatly improved tensile and corrosion resistance, is not easy to damage, and improves the service life of the automobile seat heating pad.

[0038] The gradient composite structure of the conductive current collector layer not only prevents the current collector layer from being easily pulled apart, improves the ability of the entire heating pad to resist tensile damage during daily use and installation, but also reduces the risk of material rupture or failure due to stress concentration, and ensures the stability of the conductive current collector layer in a complex mechanical environment. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A structure diagram of a flexible material arrangement conductive current collector tensile enhancement structure of an automobile seat heating pad is provided.

[0040]

BRIEF DESCRIPTION OF REFERENCE NUMERALS

[0041] 1: PET layer; 2: conductive current collector layer; 3: Mylar layer; 4: graphene heating layer. DETAILED DESCRIPTION

[0042] In order to better explain the present application, in order to facilitate understanding, the present application is described in detail below by combining the drawings through specific embodiments.

[0043] As Figure 1 shown: a flexible material arrangement conductive current collector tensile enhancement structure of an automobile seat heating pad is disclosed in the embodiment, from top to bottom including: PET layer 1, conductive current collector layer 2, Mylar layer 3 and graphene heating layer 4.

[0044] Among them, it should be noted that the PET layer 1, the conductive current collector layer 2 and the Mylar layer 3 are an integral composite structure; the Mylar layer 3 below the conductive current collector layer 2 is bonded and connected with the graphene heating layer by means of conductive adhesive; the graphene heating layer 4 is a core heating component of the automobile seat heating pad.

[0045] Compared with traditional car seat heating pads, the material has better durability, is not afraid of humid environment, and the conductive connection structure and heating material are not easy to be damaged, and the use experience is good. High reliability, uniform heating.

[0046] It should be noted that: the conductive current collector layer adopts a gradient composite structure, from the center layer to the edge layer in turn: conductive layer, carbon nanotube reinforced layer, polyimide substrate layer; wherein, the carbon nanotube reinforced layer carbon nanotubes are arranged in 45° cross arrangement, and form a mechanical interlocking structure with the Mylar layer.

[0047] The conductive current collector layer adopts a gradient composite structure, which not only prevents the current collector layer from being easily broken, improves the ability of the entire heating pad to resist tensile damage during daily use and installation, but also reduces the risk of material rupture or failure due to stress concentration, ensuring the stability of the conductive current collector layer in complex mechanical environment.

[0048] The 45° cross arrangement of the carbon nanotube reinforced layer carbon nanotubes breaks the mechanical anisotropy of single orientation, so that the material can effectively disperse stress when subjected to force in the longitudinal, transverse and oblique directions. Compared with unidirectional arrangement (0° or 90°), this arrangement can increase the tensile strength by 15-20%, and the shear strength by 30-40%.

[0049] The car seat heating pad with the 45° cross arrangement of the carbon nanotube reinforced layer carbon nanotubes can be used in-40℃ cold start test, and it only takes 90 seconds to heat up to 40℃, and the mechanical stress resistance of the seat is improved by 50%.

[0050] The bottom of the conductive current collector layer 4 in the embodiment has a rough structure; the precision of the rough structure is 42μm2-220μm2; the rough structure can match the Mylar layer; the conductive current collector layer 2 is connected with the Mylar layer 3 by means of the rough structure.

[0051] The rough structure makes the surface of the current collector rough and has more concave and convex fluctuations, which greatly increases the contact area with the active material compared with the flat surface. Taking lithium ion battery as an example, the larger contact area can make the active material more firmly adhere to the current collector, reducing the shedding of active material during battery charging and discharging, thereby improving the cycle stability and service life of the battery.

[0052] Secondly, the rough structure can increase the surface roughness of the current collector to a certain extent, change the contact mode of the corrosion medium with the surface of the current collector, and slow down the erosion speed of the corrosion medium to the current collector. In addition, the roughened surface may form a more uniform oxide film or passivation layer, further improving the corrosion resistance of the current collector and prolonging the service life of the current collector.

[0053] It needs to be further explained that the roughening structure in this embodiment is divided into a main roughening area and an auxiliary roughening area; wherein the area ratio of the main roughening area is 60-75%; the area ratio of the auxiliary roughening area is 25-40%; a transition area is arranged between the main roughening area and the auxiliary roughening area to set a gradient surface energy treatment layer.

[0054] Specifically, the main roughening area is a pyramid array structure; the base side length of the pyramid is 8-12 μm, and the cone angle is 60°; the auxiliary roughening area is a honeycomb micro-pore structure; the pore size of the honeycomb micro-pore structure is 2-4 μm, and the aspect ratio is 1:1.5. The thickness of the conductive layer is 4-12 μm.

[0055] A plasma activation layer, a microcapsule bonding layer and a three-dimensional heat conduction network are sequentially added between the Mylar layer and the graphene heating layer.

[0056] The above-mentioned additional layer structure can further improve the structural strength, so that the overall product can guarantee the service life in the special environment of the automobile seat heating pad, is not easy to damage, avoids bending and breaking, and the problem of reduced conductivity.

[0057] In actual application, the three-dimensional heat conduction network is an aluminum oxide nanowire / boron nitride sheet composite structure.

[0058] The material of the conductive current collector layer 2 in this embodiment can not only be copper foil, but also be aluminum foil. Whether to use copper foil or aluminum foil can be determined according to the actual product needs.

[0059] The conductive adhesive in this embodiment is silver paste. The high molecular polymer component in the conductive adhesive silver paste herein gives it good bonding performance, which can firmly bond electronic components and circuit boards or other substrates together. Whether the components are made of metal, ceramic, plastic or other materials, the conductive adhesive silver paste can form strong adhesion with them, ensuring that the components will not loosen or fall off due to external forces such as vibration and impact during use, improving the reliability and stability of electronic equipment.

[0060] In addition, it also has the following advantages:

[0061] Corrosion resistance: Silver has certain corrosion resistance, and the silver powder in the conductive adhesive silver paste can resist the corrosion of moisture and chemicals in the external environment to some extent, protecting the circuit connection part from corrosion and prolonging the service life of electronic equipment.

[0062] Good environmental performance: Compared with some traditional welding processes, the conductive adhesive silver paste does not need high-temperature welding during use, avoiding the generation of harmful gases and smoke during the welding process, which is more friendly to the environment and the health of operators. Moreover, the components in the conductive adhesive silver paste usually meet relevant environmental standards, reducing pollution to the environment.

[0063] The Mylar layer 3 in the embodiment is made of PET material. Of course, the Mylar layer 3 can also be replaced by a polyimide layer.

[0064] The Mylar layer 3 has excellent tensile and tear resistance and can withstand a certain degree of external pulling and friction without being easily damaged. For example, in the internal wiring of electronic devices, even if a certain degree of extrusion or bending is applied, the Mylar layer can remain intact and provide reliable protection for the internal wiring.

[0065] The polyimide layer has good resistance to chemicals such as acids, bases, and salts and is not easily chemically corroded. In harsh environments, the conductive current collector protected by the polyimide layer can maintain stable performance for a long time and prolong the service life.

[0066] The thickness of the PET layer 1 in the embodiment is 3-5 μm; the thickness of the conductive current collector layer 2 is 5-14 μm; and the thickness of the Mylar layer 3 is 1-1.5 μm.

[0067] The product with the above dimensions not only ensures the performance of the product and matches the use environment of the car seat heating pad, but also is more convenient for production into materials. For example, the efficiency and quality yield of the product during production can be maximized economically.

[0068] The technical principles of the present application are described in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations herein, those skilled in the art can conceive other specific embodiments of the present application without creative labor, and these embodiments will fall within the scope of protection of the present application.

Claims

1. A flexible material arrangement current collector pull resistant reinforcement structure for an automotive seat heating mat, characterized by, From top to bottom, it includes: a PET layer, a conductive current collector layer, a Mylar layer and a graphene heating layer; The PET layer, the conductive current collector layer and the Mylar layer are an integrated composite structure; The Mylar layer under the conductive current collector layer is bonded to the graphene heating layer by means of conductive glue; The graphene heating layer is the core heating component of the automobile seat heating pad; The conductive current collector layer adopts a gradient composite structure, and from the center layer to the edge layer, it is in turn: a conductive layer, a carbon nanotube reinforced layer and a polyimide base layer. The carbon nanotubes in the carbon nanotube reinforced layer are arranged in a 45° cross pattern, forming a mechanical interlocking structure with the Mylar layer.

2. The flexible material arrangement of the conductive current collector tensile reinforced structure of the automobile seat heating pad according to claim 1, wherein the bottom of the conductive current collector layer has a roughened structure; The precision of the roughened structure is 42-220μm2; The roughened structure can match the Mylar layer; The conductive current collector layer is connected to the Mylar layer by means of the roughened structure.

3. The flexible material arrangement of the conductive current collector tensile reinforced structure of the automobile seat heating pad according to claim 2, wherein the roughened structure is subdivided into a main roughened area and an auxiliary roughened area; The area ratio of the main roughened area is 60-75%; The area ratio of the auxiliary roughened area is 25-40%; A gradient surface energy treatment layer is provided in the transition area between the main roughened area and the auxiliary roughened area.

4. The flexible material arrangement of the conductive current collector tensile reinforced structure of the automobile seat heating pad according to claim 3, wherein the main roughened area is a pyramid array structure; The base side length of the pyramid is 8-12μm, and the taper angle is 60°; The auxiliary roughened area is a honeycomb-like microporous structure; The honeycomb-like microporous structure has a pore size of 2-4μm and a depth-width ratio of 1:1.

5.

5. The flexible material arrangement of the conductive current collector tensile reinforced structure of the automobile seat heating pad according to claim 1, wherein the thickness of the conductive layer is 4-12μm.

6. The flexible material arrangement of the conductive current collector tensile reinforced structure of the automobile seat heating pad according to claim 1, wherein a plasma activation layer, a microcapsule bonding layer and a three-dimensional heat conduction network are sequentially added between the Mylar layer and the graphene heating layer.

7. The flexible material arrangement of the conductive current collector tensile reinforced structure of the automobile seat heating pad according to claim 6, wherein the three-dimensional heat conduction network is an aluminum oxide nanowire / boron nitride sheet composite structure; The Mylar layer is a polyimide layer.

8. The flexible material arrangement of the conductive current collector tensile reinforced structure of the automobile seat heating pad according to claim 2, wherein the thickness of the PET layer is 3-5μm; The thickness of the conductive current collector layer is 5-14μm; The thickness of the Mylar layer is 1-1.5μm. ​ ​ ​ ​ ​ ​ ​

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