Bent Graphite Thermal Conductor for Thin Device Heat Dissipation
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Solution Overview
Problem
Thin mobile devices face challenges in heat dissipation due to the limited thickness and bending of micro heat pipes, which reduces their efficiency and stability, and graphite sheets' strong directionality in thermal conductivity limits their ability to efficiently dissipate heat from heat-generating components.
Innovation Solution
A graphite thermal conductor is created by laminating graphite bands in the thickness direction with bends in the extending path, utilizing high thermal conductivity in the extending plane to rapidly dissipate heat, and increasing thermal conductivity per unit cross-sectional area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If micro heat pipes are made thinner to avoid increasing device thickness, then the device thickness is reduced, but the heat dissipation efficiency and stability are reduced
Solution Approach 1:
The patent uses graphite material with superior thermal conductivity properties to replace or supplement traditional micro heat pipe structures. Graphite's isotropic thermal conductivity ensures stable heat dissipation performance even in thin configurations, resolving the contradiction between reduced thickness and maintained heat dissipation stability.
Solution Approach 2:
The patent changes the thermal conductivity parameter by selecting graphite material with specific thermal properties. The thermal conductivity coefficient of graphite in the extending direction is significantly higher than in the thickness direction, allowing thin designs to maintain high heat dissipation efficiency through optimized material parameter selection.
2Reliability
If graphite sheets are used for heat dissipation, then the thermal conductivity efficiency is improved, but the strong directionality limits heat dissipation in the thickness direction
Solution Approach 1:
The patent introduces a three-dimensional heat dissipation structure with bends in multiple directions, transforming the traditional planar graphite sheet into a spatial configuration. This dimensional change allows heat to be conducted efficiently in both extending and thickness directions by creating multiple heat transmission pathways through vertical and horizontal segments.
Solution Approach 2:
The graphite thermal conductor is divided into multiple segments including horizontal extending parts and vertical thickness-direction parts. Each segment utilizes graphite's high thermal conductivity in its primary direction, and the segmented structure collectively achieves omnidirectional heat dissipation capability.
3Adaptability or versatility
If micro heat pipes are bent to fit space restrictions, then the space utilization is improved, but the bending reduces the efficiency and success rate of inner circulation
Solution Approach 1:
The patent employs thin graphite sheets that can be flexed and bent into various configurations without compromising structural integrity or thermal performance. The flexibility of thin graphite films allows adaptation to complex spatial arrangements while maintaining effective heat conduction pathways.
Solution Approach 2:
The use of graphite material provides both the flexibility needed for bending to fit space constraints and the thermal conductivity required for efficient heat dissipation. The material's inherent properties resolve the contradiction between adaptability to spatial restrictions and maintenance of thermal circulation efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The graphite thermal conductor effectively transmits heat from heat-generating components, enhancing heat dissipation efficiency and stability in thin mobile devices by leveraging the high thermal conductivity of graphite bands in the extending plane.
Implementation Method 1
The thermal conductivity coefficient of each graphite band in the extending path is greater than the thermal conductivity coefficient thereof in the thickness direction
Data Source
AI summary
A graphite thermal conductor includes graphite bands laminated in the thickness direction. The thermal conductivity coefficient of each graphite band in the extending path is greater than the thermal conductivity coefficient thereof in the thickness direction. The extending path of each graphite band has at least one first bend in a plane which is perpendicular to the thickness direction. An electronic device applying the above graphite thermal conductor and a method for manufacturing graphite thermal conductor are also provided.