Segmented Wire Harness Sheath for Heat Dissipation
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Solution Overview
Problem
Wire harnesses in hybrid and electric vehicles face challenges in heat dissipation due to high current flow through wires, leading to increased temperature and potential damage.
Innovation Solution
A wire harness design featuring an outer sheath with sections that create gaps to allow heat dissipation, combined with elastic bodies for thermal conductivity and expansion absorption, and a fixing member to secure the sheath effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outer sheath completely covers the wire, then the wire is well protected, but heat dissipation is poor and temperature increases
Solution Approach 1:
The outer sheath is divided into multiple sections along the wire length, with gaps between adjacent sections. This segmentation allows heat to escape from the gaps while the sheath sections continue to provide protection, resolving the contradiction between complete coverage and heat dissipation.
Solution Approach 2:
Different regions of the outer sheath have different properties: the sheath sections provide protection where needed, while the gaps between sections provide heat dissipation pathways. This local differentiation allows simultaneous achievement of protection and thermal management.
2Stability of the object's composition
If the outer sheath is fixed tightly to the wire, then the sheath remains stable, but thermal expansion causes damage
Solution Approach 1:
The segmented structure with gaps between sections allows each section to expand and contract independently with thermal changes, preventing the cumulative stress and damage that would occur with a continuous tightly-fixed sheath, while maintaining overall stability.
Solution Approach 2:
The fastening strength is optimized to provide sufficient stability during normal operation while allowing controlled movement during thermal expansion. The gaps between sections change in size with temperature, accommodating expansion without causing damage.
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
Enhances heat dissipation by preventing heat trapping and ensuring efficient thermal conductivity, while minimizing damage from thermal expansion and vibration.
Implementation Method 1
the outer sheath includes a first section and a second section that each include an opening that opens in a direction orthogonal to an axis line direction of the wire... an effect of enhancing heat dissipation is achieved
Implementation Method 2
at least one end surface of the first section in the circumferential direction and at least one end surface of the second section in the circumferential direction facing one another and separated from one another
Implementation Method 3
combined with elastic bodies for thermal conductivity and expansion absorption
Implementation Method 4
combined with elastic bodies for thermal conductivity and expansion absorption
Data Source
AI summary
A wire harness, including: a wire; an outer sheath that covers a portion of an outer circumferential surface of the wire in a circumferential direction; and a fastener that fixes the outer sheath to an outer circumference of the wire, wherein: the outer sheath includes a first section and a second section that each include an opening that opens in a direction orthogonal to an axis line direction of the wire, and the fastener fixes the outer sheath to the outer circumference of the wire with at least one end surface of the first section in the circumferential direction and at least one end surface of the second section in the circumferential direction facing one another and separated from one another.