Electromagnetic Shield Presser for Wire Harness Heat Dissipation
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Solution Overview
Problem
Conventional electromagnetic shield members for wire harnesses in vehicles, such as electric cars, face challenges with heat dissipation, particularly in high-voltage applications where large currents generate significant heat, leading to issues with thermal management.
Innovation Solution
An electromagnetic shield member with a case and cover that includes a pressing mechanism with pressers on opposing walls to press and secure the electric wire, allowing for enhanced heat dissipation through the walls, and incorporating a spring bias to maintain contact during thermal expansion, while also reducing the size of the mechanism and minimizing parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional electromagnetic shield members are used to cover electric wires, then electromagnetic shielding is achieved, but heat dissipation is insufficient
Solution Approach 1:
The patent merges the electromagnetic shielding function and heat dissipation function into a single integrated structure. The conductive case and cover that provide electromagnetic shielding also serve as heat dissipation paths, eliminating the need for separate cooling mechanisms and reducing overall structural complexity while improving thermal management
Solution Approach 2:
The shielding case and cover are designed to perform multiple functions simultaneously: electromagnetic shielding, mechanical protection, and heat dissipation. This multi-functionality allows the same components to address both electromagnetic interference and thermal management issues without adding extra parts
2Temperature
If pressers are added to improve heat dissipation, then heat dissipation improves, but device complexity increases
Solution Approach 1:
The pressers are integrated into the case and cover structures rather than being separate components. The case includes pressing portions formed as integral parts of the case body, and the cover includes pressing portions formed as integral parts of the cover, reducing the total number of parts while maintaining effective heat dissipation contact
Solution Approach 2:
The pressing portions are designed to automatically maintain contact with the electric wire through elastic deformation or spring mechanisms built into the case and cover structures. This self-adjusting capability ensures continuous thermal contact without requiring external actuation or complex control systems
3Volume of moving object
If the pressing mechanism is made compact to reduce size, then device size decreases, but heat dissipation efficiency may be reduced
Solution Approach 1:
The case and cover incorporate localized pressing portions at specific contact points with the electric wire rather than requiring uniform contact across the entire structure. This localized approach concentrates heat dissipation effort where it is most needed, maintaining high heat transfer efficiency in a compact volume
Solution Approach 2:
The pressing portions extend in multiple directions from the case and cover bodies to contact the electric wire at various positions. By utilizing three-dimensional space efficiently, the design achieves adequate contact area and heat dissipation performance without increasing the overall envelope size of the shielding member
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 solution effectively improves heat dissipation from electric wires by maintaining close contact with the pressers and reducing thermal resistance, absorbing excess wire length due to thermal expansion, and maintaining contact without separate pressers, thus enhancing the thermal management of high-voltage applications.
Implementation Method 1
heat from the electric wire is likely to dissipate from the wall that includes the presser
Implementation Method 2
incorporating a spring bias to maintain contact during thermal expansion
Implementation Method 3
an electromagnetic shield member that has conductive properties and electromagnetically shields the electric wires by individually covering the electric wires
Data Source
AI summary
An electromagnetic shield member including: a case including a groove in which an electric wire is to be housed; a cover configured to be attached to the case and cover the groove; and a pressing mechanism that is housed in the groove and configured to press the electric wire, wherein the pressing mechanism has a wall that covers an outer circumferential surface of the electric wire in conjunction with the groove, and a presser provided on the wall and configured to press the electric wire.