High-thermal-conductivity silica gel sheet

Abstract

The utility model provides a high-thermal-conductivity silica gel sheet, which relates to the technical field of thermal-conductivity silica gel sheets and comprises a thermal-conductivity layer, a transition layer adhered to the bottom of the thermal-conductivity layer, a lower fixing layer arranged at the bottom of the transition layer, an upper fixing layer mounted at the top end of the thermal-conductivity layer, and a spraying layer adhered to the bottom of the lower fixing layer. Through the upper fixing layer and the lower fixing layer, the heat conduction layer and the transition layer can be fixed while the heat dissipation device is subjected to heat conduction, the heat conduction layer is prevented from expanding or shrinking deformation in the using process, and a tiny gap between the lower fixing layer and the heat dissipation device can be filled in cooperation with the spraying layer; compared with a traditional silica gel sheet, the use stability is greatly improved, and then the efficient heat conduction effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of thermally conductive silicone pad technology, and in particular to a high thermal conductivity silicone pad. Background Technology

[0002] Thermally conductive silicone pads are a type of thermally conductive medium material synthesized through a special process. In the industry, they are also known as thermally conductive silicone mats, thermally conductive silicone sheets, soft thermally conductive pads, thermally conductive silicone gaskets, etc. They are specifically designed for heat transfer through gaps, filling them to facilitate heat transfer between heat-generating and heat-dissipating components. They also provide insulation, shock absorption, and sealing, meeting the design requirements for miniaturization and ultra-thin designs. They are highly versatile and adaptable, with a wide range of applicable thicknesses. They are an excellent thermally conductive filling material, a type of thermally conductive medium material synthesized through a special process. In the industry, they are also known as thermally conductive silicone mats, thermally conductive silicone sheets, soft thermally conductive pads, thermally conductive silicone gaskets, etc.

[0003] Currently, common thermal conductive silicone pads are sheet-like structures made of simple thermal conductive silicone, which are relatively soft. In actual use, after the thermal conductive silicone pads are cured, they are prone to deformation due to thermal shrinkage and thermal expansion, which can cause gaps in the contact between the thermal conductive pads and the heat dissipation devices, thereby reducing the thermal conductivity. Therefore, we propose a high thermal conductivity silicone pad. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies. Currently, common thermal conductive silicone sheets are sheet-like structures made of simple thermal conductive silicone, which are relatively soft. In actual use, after the thermal conductive silicone sheet is cured, it is prone to deformation due to thermal shrinkage and thermal expansion, which causes gaps in the contact between the sheet and the heat dissipation device, thereby reducing the thermal conductivity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high thermal conductivity silicone pad includes a thermally conductive layer, a transition layer bonded to the bottom of the thermally conductive layer, a lower fixing layer disposed at the bottom of the transition layer, an upper fixing layer mounted at the top of the thermally conductive layer, and a sprayed layer bonded to the bottom of the lower fixing layer.

[0007] As a preferred embodiment of this utility model, the thermally conductive layer is made of silicone sheet material with a thickness of 3mm.

[0008] As a preferred embodiment of this utility model, the transition layer is made of graphite and has a thickness of 1 mm.

[0009] The technical effects of adopting the above-mentioned further solutions are as follows: Graphite is a material composed of multiple layers of graphene stacked together. It has extremely high electron mobility and excellent thermal conductivity. The thermal conductivity of graphite sheets is much higher than that of general materials, making it suitable for applications requiring efficient heat dissipation, such as the heat dissipation of electronic devices like smartphones, tablets, and laptops. Furthermore, the thermal conductivity of graphite is higher than that of silicone sheets, and the overall thermal conductivity can be improved through the transition layer.

[0010] As a preferred embodiment of this utility model, both the lower fixing layer and the upper fixing layer are made of aluminum and have a thickness of 2mm. A connecting rod is welded through the upper fixing layer at the top of the lower fixing layer near the four corners. The connecting rod is connected to the upper fixing layer by spot welding.

[0011] The technical effect of adopting the above-mentioned further solution is that by using the upper and lower fixing layers together, the heat-conducting layer and the transition layer can be fixed, preventing the heat-conducting layer from expanding or contracting during use, thus improving the stability of use. In addition, aluminum has a high thermal conductivity, which can improve the overall thermal conductivity.

[0012] As a preferred embodiment of this utility model, the connecting rod is made of metallic silver and has a diameter of 1mm.

[0013] The technical effect of adopting the above-mentioned further solution is that metallic silver has extremely high thermal conductivity, which helps to improve the overall thermal conductivity while connecting the lower and upper fixed layers, and further improves the stability of use.

[0014] As a preferred embodiment of this utility model, the sprayed coating is made of silicone grease, and its spray thickness is between 0.1 mm and 0.5 mm.

[0015] The technical effect of adopting the above-mentioned further solution is that: the silicone grease is in liquid form and is mainly used for heat conduction in precision instruments and electronic components. It can play a good heat conduction effect in small spaces. The use of the spray coating can fill the small gap between the lower fixing layer and the heat dissipation device and fully wet the contact surface to form a low thermal resistance interface, thereby improving the heat conduction efficiency.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, when the heat dissipation device is used for heat conduction, the upper and lower fixing layers can fix the heat conduction layer and the transition layer at the same time as the heat dissipation device conducts heat, preventing the heat conduction layer from expanding or contracting during use. In addition, the spray coating can fill the tiny gap between the lower fixing layer and the heat dissipation device, so that the lower fixing layer can fully adhere to the heat dissipation device. Compared with traditional silicone sheets, this greatly improves the stability of use and achieves a highly efficient heat conduction effect. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of a high thermal conductivity silicone sheet provided by this utility model;

[0019] Figure 2 A schematic diagram of the overall unfolded structure of a high thermal conductivity silicone sheet provided by this utility model;

[0020] Figure 3 This is an anatomical view of the overall front structure of a high thermal conductivity silicone sheet provided by this utility model.

[0021] Legend: 1. Thermal conductive layer; 2. Transition layer; 3. Lower fixing layer; 301. Connecting rod; 4. Upper fixing layer; 5. Spray coating layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0026] like Figure 1-3As shown, this utility model provides a technical solution: a high thermal conductivity silicone sheet, including a thermally conductive layer 1, a transition layer 2 bonded to the bottom of the thermally conductive layer 1, a lower fixing layer 3 disposed at the bottom of the transition layer 2, an upper fixing layer 4 installed at the top of the thermally conductive layer 1, and a sprayed layer 5 bonded to the bottom of the lower fixing layer 3. Example

[0027] like Figure 1-3 As shown, the thermally conductive layer 1 is made of silicone sheet with a thickness of 3mm, and the transition layer 2 is made of graphite with a thickness of 1mm. Graphite is a material composed of multiple layers of graphene stacked together, possessing extremely high electron mobility and excellent thermal conductivity. The thermal conductivity of graphite sheets is much higher than that of general materials, making them suitable for applications requiring efficient heat dissipation, such as the heat dissipation of electronic devices like smartphones, tablets, and laptops. Furthermore, the thermal conductivity of graphite is higher than that of silicone sheets. The transition layer 2 can improve the overall thermal conductivity. The lower fixing layer 3 and the upper fixing layer 4 are both made of aluminum with a thickness of 2mm. Connecting rods 301 are welded through the upper fixing layer 4 at the top of the lower fixing layer 3 near the four corners. The connecting rods 301 are connected to the upper fixing layer 4 by spot welding. Through the combined use of the upper fixing layer 4 and the lower fixing layer 3, the thermal conductivity of the thermally conductive layer 1 and the transition layer 2 can be improved. The 2nd layer is fixed to prevent the thermally conductive layer 1 from expanding or contracting during use, thus improving its stability. Furthermore, aluminum has high thermal conductivity, which enhances the overall thermal efficiency. The connecting rod 301 is made of silver with a diameter of 1mm. Silver has extremely high thermal conductivity, and while connecting the lower fixing layer 3 and the upper fixing layer 4, it also helps improve the overall thermal efficiency, further enhancing stability. The 5th layer is made of silicone grease with a thickness between 0.1mm and 0.5mm. Silicone grease is liquid and mainly used for thermal conductivity in precision instruments and electronic components. It can provide excellent thermal conductivity in small spaces. The 5th layer fills the tiny gaps between the lower fixing layer 3 and the heat dissipation device, fully wetting the contact surface to form a low thermal resistance interface, thereby improving thermal efficiency.

[0028] The working process of this utility model is as follows: When using a high thermal conductivity silicone sheet for heat dissipation devices, the upper fixing layer 4 and the lower fixing layer 3, together with the connecting rod 301, clamp and fix the thermally conductive layer 1 and the transition layer 2. This prevents the thermally conductive layer 1 from expanding or contracting during use while conducting heat to the heat dissipation device, thus improving the stability and heat conduction efficiency. The spray coating 5 fills the tiny gaps between the lower fixing layer 3 and the heat dissipation device, allowing the lower fixing layer 3 to fully adhere to the heat dissipation device. Compared with traditional silicone sheets, this greatly improves the stability of use and achieves a highly efficient heat conduction effect.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high thermal conductive silica gel sheet comprising a thermal conductive layer (1), characterized in that: The bottom of the heat-conducting layer (1) is bonded with a transition layer (2), the bottom of the transition layer (2) is provided with a lower fixing layer (3), the top end of the heat-conducting layer (1) is mounted with an upper fixing layer (4), and the bottom of the lower fixing layer (3) is bonded with a spraying layer (5).

2. The high thermal conductive silica gel sheet according to claim 1, characterized in that: The heat-conducting layer (1) is made of silica gel sheet material, and the thickness is 3 mm.

3. The high thermal conductive silica gel sheet according to claim 1, characterized in that: The transition layer (2) is made of graphite material, and the thickness is 1 mm.

4. The high thermal conductive silica gel sheet according to claim 1, characterized in that: The lower fixing layer (3) and the upper fixing layer (4) are both made of aluminum material, and the thickness is 2 mm; the top end of the lower fixing layer (3) is close to the four corners and is welded with a connecting rod (301) penetrating through the upper fixing layer (4), and the connecting rod (301) is connected with the upper fixing layer (4) through a spot welding process.

5. The high thermal conductive silica gel sheet according to claim 4, characterized in that: The connecting rod (301) is made of silver material, and the diameter is 1 mm.

6. The high thermal conductive silica gel sheet according to claim 1, characterized in that: The spraying layer (5) is made of silicone grease material, and the spraying thickness is between 0.1 mm and 0.5 mm.

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