Graphene-Reinforced Copper Conductors for Thermal Breakdown Resistance
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Solution Overview
Problem
Existing copper conductors experience thermal breakdown and high power consumption due to the conversion of electric energy into thermal energy, leading to increased impedance and potential system failure.
Innovation Solution
Graphene-reinforced ultra-conductive copper, where carbon atoms of graphene are distributed among copper atoms, forming metallic covalent bonds, resulting in a material with low temperature coefficient of resistance (TCR) and small coefficient of thermal expansion (CTE), enhancing current density and reducing thermal breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pure copper conductors are used to transmit high current, then electrical conductivity is maintained at 100% IACS, but thermal breakdown occurs due to power dissipation and temperature rise
Solution Approach 1:
The patent applies composite materials by integrating graphene into copper matrix to form graphene-reinforced ultra-conductive copper. The graphene particles are distributed within the copper matrix, creating a composite structure that combines the high electrical conductivity of copper with the exceptional thermal conductivity and structural stability of graphene. This composite approach resolves the thermal breakdown issue while maintaining excellent electrical conductivity.
Solution Approach 2:
The patent changes the material parameters by incorporating graphene at specific concentrations (0.1-5 wt%) into the copper matrix. This parameter modification alters the thermal and electrical properties of the base copper material, enhancing its ability to dissipate heat and resist thermal breakdown without significantly compromising its electrical conductivity.
2Loss of energy
If copper conductor cross-section is increased to reduce power dissipation, then power loss decreases, but copper material consumption increases
Solution Approach 1:
By creating graphene-reinforced ultra-conductive copper composites, the patent achieves superior electrical and thermal performance per unit volume. The graphene enhancement allows conductors to operate at higher current densities with reduced power dissipation, eliminating the need to increase copper cross-section and thereby reducing overall copper material consumption.
Solution Approach 2:
The patent modifies the material's effective conductivity and thermal management parameters through graphene incorporation. These parameter changes enable more efficient current transmission with lower power losses, allowing for optimized conductor sizing that reduces copper usage while maintaining acceptable power dissipation levels.
3Reliability
If pure copper is used, then electrical conductivity is 100% IACS, but temperature coefficient of resistance and coefficient of thermal expansion are high
Solution Approach 1:
The patent creates a composite material system where graphene particles are dispersed in the copper matrix. This composite structure provides stabilization effects, where the graphene network helps maintain more stable electrical resistance and dimensional properties across temperature variations, reducing the temperature coefficient of resistance and coefficient of thermal expansion while preserving high electrical conductivity.
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 graphene-reinforced copper reduces thermal breakdown and power consumption, enabling higher current density and efficiency in high-current devices, such as electric vehicles and AI servers, while minimizing copper material usage.
Implementation Method 1
the copper atoms are bonded with the carbon atoms of the graphene to form metallic covalent bonds
Implementation Method 2
graphene-reinforced ultra-conductive copper has characteristics such as low temperature coefficient of resistance (TCR), small coefficient of thermal expansion (CTE), and high current density
Implementation Method 3
The graphene-reinforced ultra-conductive copper can reduce the thermal breakdown of copper conductors
Data Source
AI summary
A use of graphene-reinforced ultra-conductive copper in a field of high-current devices is provided. In the graphene-reinforced ultra-conductive copper, carbon atoms of graphene are distributed in gaps among copper atoms. This structure can lead to an exceptionally robust internal structure for the copper material, and thus makes the copper material have properties such as low temperature coefficient of resistance (TCR), small coefficient of thermal expansion (CTE), and high current density. Therefore, the graphene-reinforced ultra-conductive copper is suitable for devices requiring a high current and a low temperature, including electric vehicles (charging/motors/signals), drones, semiconductor electronics, and defense/military-grade wires. The graphene-reinforced ultra-conductive copper is a novel conductor material that integrates energy conservation, heat reduction, pressure resistance, and cost effectiveness.