Flexible Busbar Textured Insulation Reducing Conductor Adhesion
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Solution Overview
Problem
Existing flexible busbars suffer from reduced flexibility due to excessive adhesion between the central conductor and insulation, which occurs when the insulation methods used, such as smooth sheaths or heat-shrink sleeves, create maximum contact areas leading to rigidity upon bending or twisting.
Innovation Solution
The introduction of a textured inner surface on the insulation sleeve with protrusions and/or grooves reduces the contact area between the central conductor and the sleeve, allowing for improved sliding and maintaining flexibility even when bent or twisted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a smooth sheath or insulation sleeve is used to provide electrical insulation, then maximum contact area between the conductor and insulation is achieved, but adhesion increases causing reduced flexibility
Solution Approach 1:
The inner surface of the insulation sleeve is given a non-smooth texture with protrusions and grooves at specific locations, while the outer surface remains smooth. This local modification reduces adhesion between the conductor and insulation where contact occurs, without compromising the overall insulation function or requiring additional materials.
2Reliability
If heat-shrink sleeve is used for insulation, then electrical insulation is provided, but pressure is applied against the conductor reducing flexibility
Solution Approach 1:
The insulation sleeve features a non-smooth inner surface with protrusions and grooves that localize contact points, reducing the distributed pressure against the conductor. This allows the sleeve to provide insulation without the continuous pressure that causes rigidity in heat-shrink applications.
3Reliability
If pre-extruded sleeve is used for insulation, then electrical insulation is achieved, but the sleeve must be significantly larger than the conductor making the process expensive and manual
Solution Approach 1:
The non-smooth inner surface texture allows the insulation sleeve to be sized much closer to the conductor dimensions while still providing effective insulation. This reduces material usage and enables automated manufacturing processes, eliminating the need for oversized sleeves and manual installation.
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 significantly decreases adhesion between the conductor and sleeve, enhancing the flexibility of the busbar without the need for additional lubricants, allowing for easier bending, twisting, and folding without increased rigidity.
Implementation Method 1
The inner surface is not smooth... the contact surface between the central conductor and the insulation material is reduced. This results in improved flexibility of the flexible busbar.
Data Source
AI summary
A flexible busbar includes a central conductor (generally of rectangular cross section comprising multiple layers of thin aluminum, copper or other alloys with good electrical properties (conductivity)) and a sleeve having a shape on the internal surface to reduce the adhesion between the two conductors and the sleeve when the flexible busbar is bent, folded, or twisted. This increases the flexibility of the flexible busbar.