Laminated Glass Heating Layout for Edge Electrical Isolation
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Solution Overview
Problem
Laminated glass with heating elements faces issues of electrical safety due to conductive material at the edges, which can cause electric shock and water corrosion, leading to delamination and reduced lifespan.
Innovation Solution
A laminated glass design with a heating element and a conductive ring in a circumferential region where conductive material of the heating element is removed, and the conductive ring is electrically isolated from the heating element, serving as a test for electrical isolation and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive material is removed from the edge of the heating element, then electrical safety is improved, but the heating area is reduced
Solution Approach 1:
The heating element is segmented into a central heating zone and a circumferential region. The conductive material is removed from the circumferential region while being retained in the central zone, creating distinct functional areas that separate heating function from electrical safety requirements.
Solution Approach 2:
Different regions of the heating element have different conductive material properties. The central region maintains full conductivity for heating, while the circumferential region has removed conductive material to ensure electrical safety at edges, allowing each zone to optimize its local function.
2Reliability
If a conductive ring is added to test electrical isolation, then safety testing capability is improved, but device complexity increases
Solution Approach 1:
The conductive ring serves multiple functions: it acts as a test element for verifying electrical isolation during manufacturing, provides a reference for corrosion testing during service life, and maintains structural integration with the laminated glass. This multi-functionality reduces the need for separate testing components.
Solution Approach 2:
The conductive ring is integrated into the laminated glass structure itself rather than being a separate external component. It is formed within the interlayer material or on the glass surface, merging the testing function with the structural assembly.
3Reliability
If conductive material is removed from the edge, then electrical insulation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The circumferential region is defined and prepared during the manufacturing process before final assembly. The conductive material removal is performed as a preliminary step with built-in tolerances that account for subsequent manufacturing variations, ensuring electrical insulation is achieved without requiring ultra-precise edge removal.
Data Source
AI summary
The present invention concerns a laminated glass, comprising first and second glass sheets and a ply of interlayer material therebetween; a heating element arranged on a surface of the second glass sheet adjacent the ply of interlayer material; a circumference of the heating element spaced from an edge of the second glass sheet forming a circumferential region between the circumference and the edge of the second glass sheet where conductive material of the heating element has been at least partly removed; a conductive ring configured in the circumferential region spaced from the circumference and spaced from the edge of the second glass sheet and electrically isolated from the heating element wherein conductive materials of the heating element and the conductive ring are different.