Liquid metal heat-conducting fin with high plasticity

Abstract

The utility model discloses a liquid metal heat-conducting fin with strong plasticity, which relates to the technical field of liquid metal heat-conducting fins, and comprises a liquid metal heat-conducting fin body, and further comprises a molding structure arranged on the liquid metal heat-conducting fin body and used for preventing the liquid metal heat-conducting fin body from locally flowing after the liquid metal heat-conducting fin body is liquefied; wherein the molding structure comprises an anti-overflow structure, the anti-overflow structure is arranged at the edge of the liquid metal heat-conducting fin body, a separation net is connected to the middle of the anti-overflow structure, and the anti-overflow structure surrounds the liquid metal heat-conducting fin body by a circle, so that the liquid metal heat-conducting fin body can be prevented from flowing out; and meanwhile, the separation net is arranged in the middle of the liquid metal heat-conducting fin body, so that the liquefied liquid metal heat-conducting fin body is uniformly distributed on the heat dissipation body, and the liquid metal heat-conducting fin body can be prevented from flowing to one position during liquefaction to cause cavities in the remaining parts.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid metal heat conducting sheets, in particular to a liquid metal heat conducting sheet with strong plasticity. Background Art

[0002] Liquid metal thermal conductive sheet is a metal foil with a melting point between 58°C and 200°C. It is an alloy foil made from metals with a certain degree of ductility, such as indium, tin, bismuth, zinc, silver, and aluminum. Its metallic properties, high electrical conductivity and high thermal conductivity have many applications in various heat dissipation, heat conduction, sealing and other fields.

[0003] Liquid metal is mainly arranged on the heat sink to play the role of heat conduction and heat dissipation. Liquid metal is solid at room temperature. When it absorbs heat from the heat sink, as the temperature increases, it will turn into liquid when it reaches the melting point. At this time, the liquid metal has fluidity. The method in the existing technology is usually to set a circle of foam or other materials around the liquid metal. Although it can prevent the liquid metal from flowing out, it cannot prevent the liquid metal from flowing locally, resulting in voids in the area after the liquid metal flows, and then poor thermal conductivity occurs. Summary of the Invention

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a liquid metal heat conducting sheet with strong plasticity.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a liquid metal heat conducting sheet with strong plasticity, comprising a liquid metal heat conducting sheet body, and further comprising:

[0006] A shaping structure is provided on the liquid metal heat conducting sheet body to prevent the liquid metal heat conducting sheet body from flowing towards a local area after being liquefied;

[0007] The molding structure includes an overflow-stopping structure, which is arranged at the edge of the liquid metal heat-conducting sheet body, and the middle of the overflow-stopping structure is connected to a separation net.

[0008] As mentioned above, the overflow-stopping structure includes an overflow-stopping ring and double-sided thermal conductive adhesive, and the double-sided thermal conductive adhesive is arranged on the bottom surface of the overflow-stopping ring.

[0009] As mentioned above, the bottom surface of the liquid metal heat conducting sheet body is provided with an elastic layer.

[0010] As mentioned above, the upper surface of the liquid metal heat conducting plate body is provided with a plurality of groups of protrusions.

[0011] As mentioned above, the thickness of the overflow-stopping structure is 0.06mm-0.07mm, and the bottom surface of the double-sided thermal conductive adhesive is flush with the bottom surface of the liquid metal thermal conductive sheet body.

[0012] As mentioned above, the thickness of the liquid metal heat conductive sheet body is 0.05 mm.

[0013] As mentioned above, the separation net is embedded in the interior of the liquid metal heat conducting sheet body, and a gap of 0.01 mm is set between the separation net and the bottom surface of the liquid metal heat conducting sheet body.

[0014] As mentioned above, the top of the separation net is higher than the top of the liquid metal heat conducting plate body and is flush with the top surface of the overflow prevention structure.

[0015] As mentioned above, the separation net is made of inorganic high molecular polymer.

[0016] As mentioned above, the elastic layer is made of glass microbeads, the particle size of the elastic layer is micrometers, the wall thickness of the elastic layer is micrometers, and the bulk density is 0.1-0.25 g / cm3.

[0017] Compared with the existing technology, this highly plastic liquid metal thermal conductive sheet has the following beneficial effects:

[0018] 1. The present invention provides a spill-proof structure around the liquid metal heat conducting sheet body to prevent the liquid metal heat conducting sheet body from flowing out. At the same time, a separation net is provided in the middle of the liquid metal heat conducting sheet body to evenly distribute the liquefied liquid metal heat conducting sheet body on the heat sink, thereby preventing the liquid metal heat conducting sheet body from flowing in one place during liquefaction, resulting in cavities in the remaining parts.

[0019] 2. The utility model forms a grid-like shape on the top of the liquid metal heat conducting sheet body through the partition net, thereby preventing the liquid metal heat conducting sheet body from flowing toward one place, and the contact area between the bottom surface of the liquid metal heat conducting sheet body and the heat sink remains unchanged. While reducing the fluidity of the liquid metal heat conducting sheet body, the heat dissipation performance of the liquid metal heat conducting sheet body itself can be maintained.

[0020] 3. The present invention has the advantages of transparency, high brightness, and good elasticity by providing an elastic layer, which can avoid wear on the surface of the heat sink. Due to the elasticity of the elastic layer, the liquid metal heat conductive sheet body is compressible, which can allow the thermal paste to play a compression and rebound role, allowing the liquid metal heat conductive sheet body to adhere to the heat sink, thereby improving the heat conduction effect.

[0021] Other advantages, objectives and features of the present invention will be described in part in the following description and will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the side structure of the present invention;

[0024] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 4 For this utility model Figure 2 Schematic diagram of the local enlarged structure.

[0026] In the figure: 1. Liquid metal heat conductive sheet body; 2. Stop-flow structure; 21. Stop-flow ring; 22. Double-sided thermal adhesive; 3. Separator net; 4. Elastic layer; 5. Bump. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figure 1-4 As shown, the utility model provides a liquid metal heat conductive sheet with strong plasticity, including a liquid metal heat conductive sheet body 1, and further comprising:

[0029] A shaping structure is provided on the liquid metal heat conducting sheet body 1 to prevent the liquid metal heat conducting sheet body 1 from flowing towards a local area after being liquefied;

[0030] The molding structure includes a stop-overflow structure 2 , which is arranged at the edge of the liquid metal heat conducting plate body 1 , and a partition net 3 is connected to the middle of the stop-overflow structure 2 .

[0031] By arranging a stop-flow structure 2 around the liquid metal heat conducting sheet body 1, the outflow of the liquid metal heat conducting sheet body 1 can be prevented. At the same time, a partition net 3 is arranged in the middle of the liquid metal heat conducting sheet body 1 so that the liquefied liquid metal heat conducting sheet body 1 is evenly distributed on the heat sink, which can prevent the liquid metal heat conducting sheet body 1 from flowing in one place when liquefied, resulting in voids in the remaining parts.

[0032] like Figure 3 As shown, the overflow-stop structure 2 includes an overflow-stop ring 21 and a double-sided thermal conductive adhesive 22 , and the double-sided thermal conductive adhesive 22 is arranged on the bottom surface of the overflow-stop ring 21 .

[0033] The design of the overflow-stop ring 21 can prevent the liquid metal heat conductive sheet body 1 from overflowing. At the same time, the design of the double-sided thermal conductive adhesive 22 can facilitate the fixation of the overflow-stop ring 21 and has a certain thermal conductivity.

[0034] like Figure 4 As shown, an elastic layer 4 is provided on the bottom surface of the liquid metal heat conducting sheet body 1 .

[0035] By adding the elastic layer 4, the liquid metal heat conducting sheet body 1 is made compressible, which enables the thermal paste to play a compression and rebound role, allowing the liquid metal heat conducting sheet body 1 to adhere to the heat sink, thereby improving the heat conduction effect.

[0036] like Figure 4 As shown, the upper surface of the liquid metal heat conducting plate body 1 is provided with a plurality of groups of protrusions 5 .

[0037] By providing bumps 5 on the liquid metal heat conductive sheet body 1, it becomes a 3D hybrid, which can form an elastic body and also conduct heat and absorb electromagnetic waves.

[0038] like Figure 2 、 3 As shown, the thickness of the overflow-stop structure 2 is 0.06 mm-0.07 mm, and the bottom surface of the double-sided thermal conductive adhesive 22 is flush with the bottom surface of the liquid metal thermal conductive sheet body 1 .

[0039] By designing the double-sided thermal conductive adhesive 22, the overflow prevention ring 21 can be fixed, and since its bottom surface is flush with the bottom surface of the liquid metal thermal conductive sheet body 1, the liquid metal thermal conductive sheet body 1 can be prevented from overflowing.

[0040] like Figure 1 As shown, the thickness of the liquid metal heat conductive sheet body 1 is 0.05 mm.

[0041] Through the design of the liquid metal heat conductive sheet body 1, liquid metal usually has the characteristic of thermal expansion and contraction. After it liquefies and expands, its thickness is lower than the thickness of the stop-flow structure 2, so it has space to expand, which can prevent it from overflowing from above the stop-flow ring 21.

[0042] like Figure 1 、 4 As shown, the separation net 3 is embedded in the interior of the liquid metal heat conducting sheet body 1 , and a gap of 0.01 mm is set between the separation net 3 and the bottom surface of the liquid metal heat conducting sheet body 1 .

[0043] By setting a distance between the separator net 3 and the bottom surface of the liquid metal heat conducting sheet body 1, the liquid metal heat conducting sheet body 1 can be kept as a whole, thereby increasing the contact area between the liquid metal heat conducting sheet body 1 and the heat sink. In addition, since the distance between the separator net 3 and the bottom surface of the liquid metal heat conducting sheet body 1 is only 0.01 mm, the liquid metal heat conducting sheet body 1 is affected by surface tension when it is liquefied, making it difficult for the liquid metal heat conducting sheet body 1 to flow into each other.

[0044] like Figure 2 、 4 As shown, the top of the separation net 3 is higher than the top of the liquid metal heat conducting plate body 1 and is flush with the top surface of the overflow prevention structure 2 .

[0045] Through the design of the separation net 3, since it is higher than the top of the liquid metal heat conducting sheet body 1, it can prevent the height of the liquid metal heat conducting sheet body 1 from being higher than the separation net 3 after being converted from solid to liquid, thereby preventing the liquid metal heat conducting sheet body 1 from overflowing to different parts.

[0046] like Figure 4 As shown, the separation net 3 is made of inorganic high molecular polymer.

[0047] Through the design of the partition net 3, the top of the liquid metal heat conducting sheet body 1 is formed into a grid shape, and the contact area between the liquid metal heat conducting sheet body 1 and the heat sink remains unchanged. While reducing the fluidity of the liquid metal heat conducting sheet body 1, the heat dissipation performance of the liquid metal heat conducting sheet body 1 itself can be maintained.

[0048] like Figure 4 As shown, the elastic layer 4 is made of glass microbeads, the particle size of the elastic layer 4 is 10 microns, the wall thickness of the elastic layer 4 is 1 micron, and the bulk density is 0.1-0.25 g / cm3.

[0049] Since the elastic layer 4 is made of glass beads, which have the advantages of transparency, high brightness, and good elasticity, it is suitable for occasions with high requirements for smoothness and can avoid wear on the surface of the heat sink.

[0050] Working principle: First, stick the double-sided thermal adhesive 22 to the periphery of the heat sink. When the liquid metal heat conducting sheet body 1 is liquefied, the stop-flow ring 21 surrounds the liquid metal heat conducting sheet body 1, which can prevent the liquid metal heat conducting sheet body 1 from flowing out. At the same time, a partition net 3 is set in the middle of the liquid metal heat conducting sheet body 1 to make the liquefied liquid metal heat conducting sheet body 1 evenly distributed on the heat sink, which can prevent the liquid metal heat conducting sheet body 1 from flowing in one place when liquefied. Moreover, since the stop-flow ring 21 and the partition net 3 are higher than the liquid metal heat conducting sheet body 1, it can prevent the liquid metal heat conducting sheet body 1 from expanding and exceeding the partition net 3 and the stop-flow ring 21 to overflow.

[0051] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid metal heat conducting sheet with strong plasticity, comprising a liquid metal heat conducting sheet body (1), characterized in that: Also includes: A shaping structure, which is provided on the liquid metal heat conducting plate body (1) and is used to prevent the liquid metal heat conducting plate body (1) from flowing towards a local area after being liquefied; The shaping structure includes a stop-flow structure (2), the stop-flow structure (2) is arranged at the edge of the liquid metal heat conducting plate body (1), and the middle of the stop-flow structure (2) is connected to a separation net (3).

2. The liquid metal heat conductive sheet with high plasticity according to claim 1, characterized in that: The overflow-stopping structure (2) comprises an overflow-stopping ring (21) and a double-sided thermal conductive adhesive (22), wherein the double-sided thermal conductive adhesive (22) is arranged on the bottom surface of the overflow-stopping ring (21).

3. The liquid metal heat conducting sheet with high plasticity according to claim 1, characterized in that: An elastic layer (4) is provided on the bottom surface of the liquid metal heat conducting sheet body (1).

4. The liquid metal heat conductive sheet with high plasticity according to claim 1, characterized in that: The upper surface of the liquid metal heat conducting sheet body (1) is provided with a plurality of groups of protrusions (5).

5. The liquid metal heat conducting sheet with high plasticity according to claim 2, characterized in that: The thickness of the overflow-stopping structure (2) is 0.06 mm to 0.07 mm, and the bottom surface of the double-sided thermal conductive adhesive (22) is flush with the bottom surface of the liquid metal thermal conductive sheet body (1).

6. The liquid metal heat conducting sheet with high plasticity according to claim 1, characterized in that: The thickness of the liquid metal heat conducting sheet body (1) is 0.05 mm.

7. The liquid metal heat conductive sheet with high plasticity according to claim 1, characterized in that: The separation net (3) is embedded in the interior of the liquid metal heat conducting sheet body (1), and a gap of 0.01 mm is provided between the separation net (3) and the bottom surface of the liquid metal heat conducting sheet body (1).

8. The liquid metal heat conductive sheet with high plasticity according to claim 2, characterized in that: The top of the separation net (3) is higher than the top of the liquid metal heat conducting plate body (1) and is flush with the top surface of the overflow prevention ring (21).

9. The liquid metal heat conductive sheet with high plasticity according to claim 1, characterized in that: The separation net (3) is made of inorganic high molecular polymer.

10. The liquid metal heat conducting sheet with high plasticity according to claim 3, characterized in that: The elastic layer (4) is made of glass microbeads, the particle size of the elastic layer (4) is 10 micrometers, the wall thickness of the elastic layer (4) is 1 micrometer, and the bulk density is 0.1-0.25 g / cm3.

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