Graphite heat conducting member
Patent Information
- Application Number
- CN202522243254.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-10-23
AI Technical Summary
但以上材料要么会有出油污染电子器件的可能；要么会在装配或者长期使用过程中存在流动的风险，易导致部件错位，出现导热效率下降的问题；要么固化后需要压缩才能使用，在这其中对接触部件产生比较大的应力，可能损坏精密电子元件（例如：液晶屏、传感器等）
[0014]采用上述技术方案后，本实用新型有益效果为：在本实用新型中，采用石墨件作为导热材料，利用石墨中能快速传播热量的层状结构，实现快速导热，以保证能有效传递热量。同时当本石墨导热件置于电子设备中进行导热时，石墨件一侧的拱形部与电子设备的一侧接触，石墨件的另一侧与电子设备的另一侧接触，能有效填充到电子设备内部缝隙中，以将电子设备的热量从一侧向另一侧导出。另外，石墨层间结合力弱（层间弹性模量低），受压时层间容易发生轻微的、可恢复的形变。且本石墨导热件中的石墨件的拱形部的截面呈弧形，减小局部应力集中，压缩时（例如按压电子设备的一侧进而按压到内部的石墨件时）回弹的应力小，避免因应力较大损坏电子元件，也避免出现污染电子器件和部件错位的问题。
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Figure CN224818431U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat conduction technology, specifically to a graphite heat conduction component. Background Technology
[0002] Currently, electronic devices are rapidly developing towards intelligence, thinness, and multifunctionality. Under this trend, not only is the power of devices continuously increasing, but their thickness is also constantly shrinking, leading to increasingly prominent heat dissipation problems. Traditional thermal conductive materials generally include thermal pads, thermal grease, thermal gel, thermal potting compound, or graphite foam, all of which have good thermal conductivity. However, these materials either have the potential to ooze oil and contaminate electronic components; or they pose a risk of flow during assembly or long-term use, easily leading to component misalignment and reduced thermal conductivity; or they require compression after curing before use, which generates significant stress on contact parts and may damage precision electronic components (e.g., LCD screens, sensors). Utility Model Content
[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a graphite heat-conducting component that has the advantages of good thermal conductivity, low rebound stress, and effective filling of internal gaps in electronic devices.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a graphite heat-conducting component, comprising: a graphite component; an arched portion is provided on one side of the graphite component; the cross-section of the arched portion is arc-shaped.
[0005] The present invention further provides that the graphite component includes: a first protective film, a second protective film, and a graphite substrate located between the first protective film and the second protective film.
[0006] The present invention further comprises that the first protective film has a first adhesive layer on the side facing the graphite substrate, and the second protective film has a second adhesive layer on the side facing the graphite substrate.
[0007] The present invention further provides that the graphite substrate is made of any one of the following three materials: natural graphite, artificial graphite, and graphene film.
[0008] The present invention further includes, in that the graphite thermal conductive component, a first adhesive component; The ends of the graphite part are bonded together by the first adhesive to form a cavity, or the ends of the graphite part overlap and are bonded together by the first adhesive in the overlapping area to form a cavity.
[0009] The present invention further provides that the upper part of the cross-section of the cavity is arc-shaped, and the middle and lower part connected to the upper part is rectangular.
[0010] The present invention further includes, in addition to, a shaping component; the shaping component is detachably assembled within the cavity.
[0011] The present invention further provides that the shaping component is any one of three types: PU foam, EVA foam, and pearl cotton.
[0012] The present invention further includes, in addition to, a second adhesive component; The graphite part is provided with the second adhesive on the bottom side of the first and / or last ends.
[0013] The present invention further provides that the second adhesive is any one of three types: thermally conductive double-sided adhesive, hot melt adhesive, and instant adhesive.
[0014] The beneficial effects of this utility model after adopting the above technical solution are as follows: In this utility model, graphite is used as the heat-conducting material. Utilizing the layered structure of graphite that allows for rapid heat transfer, rapid heat conduction is achieved, ensuring effective heat transfer. Simultaneously, when this graphite heat-conducting component is placed in an electronic device for heat conduction, the arched portion on one side of the graphite component contacts one side of the electronic device, and the other side of the graphite component contacts the other side of the electronic device, effectively filling the internal gaps of the electronic device to conduct heat from one side to the other. Furthermore, graphite has weak interlayer bonding (low interlayer elastic modulus), and slight, recoverable deformation easily occurs between layers under pressure. Moreover, the arched portion of the graphite component in this heat-conducting component has an arc-shaped cross-section, reducing local stress concentration. When compressed (e.g., when pressing one side of the electronic device and then pressing the internal graphite component), the rebound stress is small, avoiding damage to electronic components due to excessive stress, and also avoiding problems such as contamination of electronic devices and component misalignment. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of this graphite heat-conducting component; Figure 2 This is a schematic diagram of the structure of the present invention, in which a shaped component is filled inside the cavity; Figure 3 This is another structural schematic diagram of the graphite heat-conducting component.
[0017] Explanation of reference numerals in the attached drawings: 110, arched portion; 120, first protective film; 130, second protective film; 140, graphite substrate; 210, first adhesive layer; 220, second adhesive layer; 300, cavity; 400, first adhesive component; 500, shaping component; 600, second adhesive component. Detailed Implementation
[0018] The present invention will be further described in detail below with reference to the accompanying drawings.
[0019] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
[0020] This embodiment relates to a graphite heat-conducting component, as shown in the reference. Figure 1 The device includes: a graphite component; an arched portion 110 on one side of the graphite component; and an arc-shaped cross-section of the arched portion 110. Specifically, the graphite component is used as a heat-conducting material, utilizing the layered structure of graphite that enables rapid heat transfer to achieve rapid heat conduction and ensure effective heat transfer. Simultaneously, when this graphite heat-conducting component is placed in an electronic device for heat conduction, the arched portion 110 on one side of the graphite component contacts one side of the electronic device, and the other side of the graphite component contacts the other side of the electronic device, effectively filling the internal gaps of the electronic device to conduct heat from one side to the other. Furthermore, graphite has weak interlayer bonding (low interlayer elastic modulus), and under pressure, slight, recoverable deformation easily occurs between the layers. The layered structure of graphite also allows it to effectively absorb and dissipate heat, preventing localized stress accumulation. Furthermore, the arched portion 110 of the graphite component in this graphite thermal conductive component has an arc-shaped cross-section, reducing local stress concentration. During compression (e.g., when pressing one side of an electronic device and subsequently the internal graphite component), the rebound stress is small, preventing damage to electronic components due to excessive stress and avoiding contamination of electronic devices and component misalignment. In this embodiment, the left and right sides of the graphite component are bent downwards, causing the middle part of the graphite component to arch upwards to form the arched portion 110.
[0021] Furthermore, referring to Figures 1-3The graphite component includes a first protective film 120, a second protective film 130, and a graphite substrate 140 located between the first protective film 120 and the second protective film 130. Specifically, a first adhesive layer 210 is provided on the side of the first protective film 120 facing the graphite substrate 140, and a second adhesive layer 220 is provided on the side of the second protective film 130 facing the graphite substrate 140. The first protective film 120 and the second protective film 130 are used to protect the graphite substrate 140 and strengthen the overall strength of this graphite heat-conducting component, so as to prevent the graphite substrate 140 from falling off during bending to form the arched portion 110 or being compressed. The first protective film 120 and the second protective film 130 are bonded to the graphite substrate 140 by the first adhesive layer 210 and the second adhesive layer 220, respectively. Both the first adhesive layer 210 and the second adhesive layer 220 are adhesive layers. In this embodiment, the first protective film 120 and the second protective film 130 are located on the upper and lower surfaces of the graphite substrate 140, respectively.
[0022] Further, the graphite substrate 140 is made of any one of three materials: natural graphite, artificial graphite, and graphene film. The thickness of the graphite substrate 140 is set to 0.01-0.5 mm. Specifically, in this embodiment, the graphite substrate 140 is made of artificial graphite (i.e., synthetic graphite). Artificial graphite has a surface thermal conductivity of up to 1400 W / (m·K), exhibiting good thermal conductivity. When the graphite substrate 140 is made of artificial graphite, its thickness is set to 0.07 mm. The artificial graphite is formed by sintering a polyimide film. In some embodiments, the graphite substrate 140 is made of natural graphite. Natural graphite has a surface thermal conductivity of 120-400 W / (m·K) and is relatively inexpensive. When the graphite substrate 140 is made of natural graphite, its thickness is set to 0.3 mm. The natural graphite is obtained from natural graphite ore, which is acid-washed, sintered, and pressed into shape. In other embodiments, the graphite substrate 140 can also be made of graphene film, which has high thermal conductivity and ultra-flexibility. The graphene film is formed by coating a mixture of graphene powder and an aqueous substrate onto a film surface. In other embodiments, the thickness of the graphite substrate 140 can also be 0.01 mm, 0.02 mm, 0.03 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm. As long as the thickness of the graphite substrate 140 is within the range of 0.01-0.5 mm, no specific limitation is imposed.
[0023] Furthermore, the graphite heat-conducting component also includes: a first adhesive member 400; the two ends of the graphite component are bonded together by the first adhesive member 400 to form a cavity 300, or the two ends of the graphite component overlap and are bonded together in the overlapping area by the first adhesive member 400 to form a cavity 300. In this embodiment, refer to... Figure 1and Figure 2 The graphite part has its two ends overlapping and bonded together by a first adhesive member 400 within the overlapping area to form a cavity 300. Specifically, the graphite part is elongated, and the two ends of the elongated graphite part overlap. The overlapping area refers to the overlap length between the first and last ends of the elongated graphite part, which can be adjusted according to actual conditions. In this embodiment, the graphite part forms a graphite ring after its two ends overlap and are bonded together by the first adhesive member 400. The circumferential direction of the graphite part forming the cavity 300 is the length direction of the graphite part when it is unfolded. In some embodiments, refer to... Figure 3 The ends of the graphite part are bonded together by the first adhesive 400 to form a cavity 300, that is, there is no overlapping area between the ends of the graphite part.
[0024] Furthermore, the upper part of the cross-section of cavity 300 is arched, while the lower middle part connecting to the upper part is rectangular. That is, the graphite part as a whole forms an arch, resulting in less rebound stress when compressed, which will not affect the performance of electronic equipment. Specifically, the upper part of the cross-section of cavity 300 is arched, while the lower middle part connecting to the upper part is square.
[0025] In this embodiment, refer to Figure 2 The graphite heat-conducting component also includes a shaping component 500; the shaping component 500 is detachably assembled within the cavity 300. Specifically, the shaping component 500 is detachably assembled in the lower middle part of the cavity 300. In this embodiment, when the ends of the graphite component are bonded together or overlapped to form a graphite ring, the graphite matrix 140 in the graphite component has a certain hardness and strength. By bending the left and right sides of the graphite component downwards, the middle part of the graphite component arches upwards to form an arched portion 110, thus shaping the graphite component itself. Furthermore, support and shaping can be achieved by filling the cavity 300 with the shaping component 500, especially when the graphite component is large. Simultaneously, during the manufacturer's shipping process, the shaping component 500 can be filled into the cavity 300 of the graphite component to prevent it from being crushed. Further, the shaping component 500 is set as any one of PU foam, EVA foam, and pearl cotton. In this embodiment, the shaping component 500 is PU foam. PU foam (also known as PU sponge, PU foaming material, polyurethane sponge, sponge, etc.) is a multifunctional new type of special foaming material. PU foam has the characteristics of being environmentally friendly, lightweight, impact-resistant, sound-insulating, heat-insulating, and anti-aging, making it an energy-saving and environmentally friendly material. In some embodiments, the shaping component 500 can also be EVA foam or pearl cotton.
[0026] Furthermore, the graphite thermal conductive component also includes a second adhesive component 600; the second adhesive component 600 is disposed on the bottom side of the first end and / or the tail end of the graphite component. When the ends of the graphite component are bonded together by the first adhesive component 400, the bottom side of both the first and tail ends of the graphite component is provided with the second adhesive component 600 to install the graphite component into the corresponding position within the electronic device and achieve stable heat conduction. When the first and tail ends of the graphite component overlap, when the first end of the graphite component is located below the tail end, the second adhesive component 600 is disposed on the bottom side of the first end of the graphite component to achieve a stable installation; when the tail end of the graphite component is located below the first end, the second adhesive component 600 is disposed on the bottom side of the tail end of the graphite component to achieve a stable installation. In addition, the first adhesive component 400 and the second adhesive component 600 can be any one of three types: thermally conductive double-sided adhesive, hot melt adhesive, and instant adhesive. In this embodiment, the first adhesive component 400 and the second adhesive component 600 are thermally conductive double-sided adhesives. Thermally conductive double-sided adhesives are industrial adhesive materials made of acrylic polymer composite thermally conductive ceramic powder and silicone adhesive, possessing both adhesive and thermal conductivity functions. In this embodiment, the lengths of both the first adhesive component 400 and the second adhesive component 600 are less than the overall length of the graphite component.
[0027] In addition, when multiple graphite parts are provided, the multiple graphite parts can be arranged in a spaced and parallel manner, and each graphite part can be bonded to the same release paper by its second adhesive 600.
[0028] The preparation method of this graphite thermal conductive component includes the following steps: S100, Material pretreatment; The graphite substrate 140 is made into a sheet of a predetermined thickness, and the graphite substrate 140, the first protective film 120, and the second protective film 130 are surface treated. S200: Apply adhesive to the inner sides of the first protective film 120 and the second protective film 130 respectively to form the first adhesive layer 210 and the second adhesive layer 220 respectively. S300: Align the first protective film 120 with one side of the graphite substrate 140 and roll it together. Then align the second protective film 130 with the other side of the graphite substrate 140 and roll it together. Repeat the rolling process to obtain a graphite part. S400, bend the left and right sides of the graphite part downward so that the middle part of the graphite part arches upward to form an arched part 110, so as to obtain the graphite heat-conducting part.
[0029] In step S100, the predetermined thickness is set to 0.01-0.5 mm. Simultaneously, a sheet of a specific size is supported on the graphite substrate 140. The surface of the graphite substrate 140 is wiped with deionized water and alcohol to remove debris and impurities to avoid affecting adhesion; the first protective film 120 and the second protective film 130 are cleaned to remove surface oil and impurities. The adhesive can be acrylic glue or silicone. In step S300, after the first protective film 120 and the second protective film 130 are bonded to the graphite substrate 140, repeated rolling is performed to eliminate air bubbles between the first protective film 120, the second protective film 130, and the graphite substrate 140, ensuring no gaps between the three layers.
[0030] In step S400, after forming the arched portion 110, the following steps may also be included: A first adhesive 400 is attached between the ends of the graphite part to form a cavity 300, or the ends of the graphite part are overlapped and the first adhesive 400 is attached to the overlapping area to form a cavity 300. Then, a second adhesive 600 is attached to the bottom side of the beginning and / or end of the graphite part to fix it inside the electronic device for heat conduction. The overall manufacturing process is simple and improves production efficiency. In step S400, the ends of the graphite part can be bonded together using the second adhesive 600 to naturally arch the middle of the graphite part to form an arched portion 110, or the arched portion 110 can be formed by hot pressing or using a clamp.
[0031] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A graphite heat-conducting component, characterized in that, include: Graphite parts; An arched portion (110) is provided on one side of the graphite component; the cross-section of the arched portion (110) is arc-shaped; the graphite component includes: a first protective film (120), a second protective film (130), and a graphite substrate (140) located between the first protective film (120) and the second protective film (130).
2. The graphite heat-conducting component according to claim 1, characterized in that, The first protective film (120) has a first adhesive layer (210) on the side facing the graphite substrate (140), and the second protective film (130) has a second adhesive layer (220) on the side facing the graphite substrate (140).
3. The graphite thermal conductive element according to claim 1, characterized in that, The graphite substrate (140) is made of any one of three materials: natural graphite, artificial graphite, and graphene film.
4. The graphite heat-conducting component according to any one of claims 1-3, characterized in that, The graphite thermal conductive component further includes: a first adhesive component (400); The ends of the graphite part are bonded together by the first adhesive (400) to form a cavity (300), or the ends of the graphite part overlap and are bonded together by the first adhesive (400) in the overlapping area to form a cavity (300).
5. The graphite thermal conductive element according to claim 4, characterized in that, The upper part of the cross-section of the cavity (300) is arc-shaped, and the middle and lower part connected to the upper part is rectangular.
6. The graphite thermal conductive element according to claim 4, characterized in that, The graphite heat-conducting component further includes a shaping component (500); the shaping component (500) is detachably assembled in the cavity (300).
7. The graphite thermal conductive element according to claim 6, characterized in that, The shaping component (500) is set to any one of three types: PU foam, EVA foam, and pearl cotton.
8. The graphite thermal conductive element according to claim 7, characterized in that, The graphite thermal conductive component further includes: a second adhesive component (600); The graphite part is provided with the second adhesive element (600) on the bottom side of the first and / or last ends.
9. The graphite thermal conductive element according to claim 8, characterized in that, The second adhesive (600) is any one of three types: thermally conductive double-sided adhesive, hot melt adhesive, and instant adhesive.