Multi-Alloy Copper Power Cable for Thin Hinge Durability
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Solution Overview
Problem
As computing devices become thinner and components smaller, hinges face challenges in accommodating power cables that connect separate portions of the device, leading to increased stress and strain on wires due to limited space and range of motion, which can result in reduced cable lifespan.
Innovation Solution
A power cable design featuring multiple copper alloy wires with varying percentages of silver as strengthening alloying material, arranged in a custom gauge and configuration to maximize conductivity and durability, including an inner core, insulation, and shield layers, which can extend through hinges and maintain electrical connection across the device's portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If computing devices are made thinner and components smaller, then device portability and integration are improved, but stress and strain on power cables increase due to limited space
Solution Approach 1:
The power cable employs a composite structure with multiple copper alloy wire types having different silver percentages (e.g., 3% silver for strength, 1% silver for conductivity). This composite material approach allows the cable to simultaneously achieve high mechanical strength to withstand hinge stress and high electrical conductivity for efficient power transfer, resolving the contradiction between device miniaturization and cable durability.
Solution Approach 2:
Different sections of the cable contain wires with locally optimized properties: inner core wires have higher silver content (3%) for strength where mechanical stress is highest, while outer wires have lower silver content (1%) for conductivity. This local quality differentiation allows the cable to withstand localized hinge stress while maintaining overall electrical performance despite reduced device thickness.
2Adaptability or versatility
If power cables extend through hinges to connect separate device portions, then device flexibility and configurability are improved, but cable lifespan decreases due to repeated bending and mechanical stress
Solution Approach 1:
The cable uses composite copper alloy wiring with varying silver percentages to achieve both flexibility for hinge movement and durability for extended lifespan. The multi-wire construction with different material compositions allows the cable to bend repeatedly through the hinge while maintaining structural integrity and electrical connectivity over thousands of cycles.
Solution Approach 2:
The cable is segmented into multiple individual wires (19 wires per plurality) rather than a single solid conductor. This segmentation allows each wire to independently flex and withstand bending stress from hinge movement, preventing catastrophic failure and extending cable lifespan while maintaining device configurability.
3Reliability
If multiple wire types with different alloy compositions are used, then conductivity and durability are improved, but manufacturing complexity increases
Solution Approach 1:
The invention varies the silver percentage parameter in copper alloy wires to optimize both conductivity and durability. By systematically changing this material parameter across different wire groups (e.g., 3% silver for strength, 1% silver for conductivity), the cable achieves superior reliability while maintaining manufacturability through controlled compositional variation rather than complex structural design.
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 power cable design enhances conductivity and durability, allowing for efficient power transfer while withstanding the mechanical stresses of hinge movement, significantly increasing the cable's bending life cycles compared to standard cables.
Implementation Method 1
The power cable includes a first plurality of copper alloy wires having a first percentage of silver and a second plurality of copper alloy wires surrounding the first plurality of copper alloy wires and having a second percentage of silver
Implementation Method 2
The power cable includes a first plurality of copper alloy wires having a first percentage of strengthening alloying material and a second plurality of copper alloy wires surrounding the first plurality of copper alloy wires and having a second percentage of strengthening alloying material
Data Source
AI summary
A power cable may include a first plurality of copper alloy wires having a first percentage of strengthening alloying material and a second plurality of copper alloy wires having a second percentage of strengthening alloying material. One or more of the second plurality of copper alloy wires may abut one or more of the first plurality of copper alloy wires. The second percentage of strengthening alloying material may be different than the first percentage of strengthening alloying material. Computing devices using power cables are also described.