Insulated Carbon Nanotube Wire for Voltage Endurance and Heat Dissipation
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Solution Overview
Problem
Existing carbon nanotube electric wires face challenges in achieving electroconductivity comparable to copper or aluminum while maintaining weight reduction and voltage endurance, and in effectively managing heat dissipation and insulation.
Innovation Solution
A coated carbon nanotube electric wire design featuring a carbon nanotube wire with a thick insulating coating layer, where the sectional area of the coating layer is significantly larger than the nanotube wire, and the Young's modulus of the coating material is carefully proportioned to ensure adhesion and prevent peeling, combined with optimized orientation and density of carbon nanotubes for enhanced heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick insulating coating layer is applied to carbon nanotube wire, then voltage endurance and insulation reliability are improved, but heat dissipation ability deteriorates
Solution Approach 1:
The patent optimizes the thickness ratio parameter of the insulating coating layer to be 1.5-4.5 times the diameter of the carbon nanotube wire, and controls the Young's modulus ratio between coating material and nanotube material to be 0.00001-0.5. These parameter changes achieve a balance between sufficient insulation thickness for voltage endurance and adequate heat dissipation capability.
2Weight of moving object
If carbon nanotube wire is used instead of metal wire, then weight is reduced, but electroconductivity and heat dissipation ability deteriorate
Solution Approach 1:
The patent uses composite material structure combining carbon nanotubes with insulating coating materials. The carbon nanotube core provides exceptional electroconductivity and strength-to-weight ratio, while the insulating coating layer provides electrical insulation and heat dissipation. This composite structure achieves weight reduction while maintaining or improving overall performance.
Solution Approach 2:
The patent optimizes the cross-sectional area ratio of the insulating coating layer to the carbon nanotube wire to be 1.5-4.5 times, and controls the Young's modulus ratio to be 0.00001-0.5. These parameter optimizations ensure that the carbon nanotube wire maintains electroconductivity comparable to copper while achieving weight reduction.
3Reliability
If insulating coating layer is applied to carbon nanotube wire, then insulation performance is improved, but adhesion and resistance to peeling deteriorate
Solution Approach 1:
The patent controls the Young's modulus ratio between the insulating coating material and nanotube material to be 0.00001-0.5, and optimizes the thickness ratio to be 1.5-4.5 times the nanotube diameter. These parameter changes ensure that the coating layer is thick enough for insulation while maintaining good adhesion and resistance to peeling through appropriate material selection.
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 design achieves excellent electroconductivity, voltage endurance, weight reduction, and improved heat dissipation, while preventing peeling and cracking of the insulating layer, ensuring reliable insulation and handling capabilities.
Implementation Method 1
the CNT is a three-dimensional mesh structure element configured of a single layer of a tubular element that has a mesh structure of hexagonal lattices or of multiple layers substantially coaxially disposed, has a light weight, and has various excellent properties such as electroconductivity
Implementation Method 2
a heater that has a heat conductive member made of a matrix of CNTs using excellent heat conductivity that CNT wires exhibit
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The present invention relates to a coated carbon nanotube electric wire that has excellent electroconductivity that is comparable to a wire made of copper, aluminum, or the like, realizes excellent voltage endurance, and can further realize weight reduction. A coated carbon nanotube electric wire (1) includes: a carbon nanotube wire (10) including one or more carbon nanotube aggregates (11) configured of a plurality of carbon nanotubes (11a); and an insulating coating layer (21) coating the carbon nanotube wire, a proportion of a sectional area of the insulating coating layer (21) in a radial direction with respect to a sectional area of the carbon nanotube wire (10) in the radial direction is greater than 1.5, the sectional area of the carbon nanotube wire (10) in the radial direction is equal to or greater than 0.031 mm2, and the sectional area of the insulating coating layer (21) in the radial direction is equal to or greater than 0.049 mm2.