Series-Connected Heating Element Busbar Length Control
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Solution Overview
Problem
Existing heating elements for vehicles and architecture face challenges in controlling heating values for each part without obstructing the view, as they often require high surface resistance and are difficult to drive at low voltages, leading to issues with transmittance and surface resistance deviations.
Innovation Solution
A heating element comprising multiple heating units connected in series with busbars, where the power per unit area decreases with increasing busbar length, allowing for controlled heating values by adjusting busbar lengths, and using a conductive heating means to generate heat without obstructing the view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the conductive material or the density of the heating pattern is increased to control surface resistance, then the heating value can be controlled, but the transmittance varies for each part causing visual obstruction
Solution Approach 1:
The heating element is divided into multiple heating units, each with its own busbar configuration. By segmenting the heating element and connecting units in series, the patent achieves uniform current distribution across all units, ensuring consistent transmittance and surface resistance while maintaining reliable heating value control for each segment.
Solution Approach 2:
The patent changes the electrical connection parameter from parallel to series configuration. This parameter change ensures that the same current flows through all heating units, eliminating variations in surface resistance and transmittance that would otherwise occur when trying to control heating values through material thickness or pattern density adjustments.
2Illumination intensity
If transparent conductive material is used to form heating layer, then the glass remains visually clear, but the surface resistance is too high for low voltage operation
Solution Approach 1:
The patent uses a composite structure combining transparent conductive material (such as ITO) with metallic patterns. The transparent conductive material provides visual clarity while the metallic patterns provide low resistance pathways. By connecting multiple heating units with metallic busbars in series, the composite structure achieves both optical transparency and electrical conductivity suitable for low voltage operation.
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
This solution enables precise control of heating values for each part, maintaining uniform transmittance and surface resistance, and operates effectively at low voltages, ensuring efficient heating without visual obstruction.
Implementation Method 1
The heating glass uses a concept of generating heat from a heat line by applying electricity to both ends of the heat line
Data Source
AI summary
The present invention relates to a heating element comprising: two or more heating units comprising two busbars and a conductive heating means electrically connected to the two busbars, in which the busbars of the heating units are connected with each other in series and power per unit area of each of the heating units in the heating element decreases as a length of the busbar increases, and a method of preparing the same.