Serial Heating Wire Pattern for 48V Vehicle Glass
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Solution Overview
Problem
Conventional heating wire apparatuses for vehicle safety glass consume excessive power when used in electric vehicles with 48V-batteries, leading to overheating, and proposed solutions like DC-DC converters are costly due to the additional components required.
Innovation Solution
A heating wire apparatus with a serial pattern of bus bars and heating wires optimized for vehicle safety glass, where the bus bars and heating wires are arranged to connect sequentially and receive voltage directly from the battery, maintaining efficient heating performance without the need for a DC-DC converter, even at high voltages like 48V.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heating wires are connected in parallel between bus bars, then heating coverage is improved, but power consumption increases excessively at 48V battery voltage
Solution Approach 1:
The heating wire apparatus divides the heating system into multiple independent heating zones, each with its own heating wire connected to separate bus bars. This segmentation allows selective activation of heating zones based on actual needs, reducing overall power consumption while maintaining adequate heating coverage. Each heating wire segment can be controlled independently, enabling the system to provide targeted heating only where required.
2Use of energy by moving object
If a DC-DC converter is added to reduce battery voltage, then power consumption is reduced, but production cost increases
Solution Approach 1:
The invention extracts and eliminates the DC-DC converter component from the heating wire apparatus. By redesigning the electrical connection structure to directly connect heating wires with appropriate resistance values to the 48V battery through bus bars, the system achieves compatible power consumption without requiring voltage conversion. This extraction of the unnecessary component significantly reduces production costs while maintaining the desired power consumption level.
3Productivity
If heating wires are connected in parallel, then heating efficiency is improved, but the system overheats at high voltage
Solution Approach 1:
The invention applies local quality by using heating wires with different resistance values in different zones rather than uniform parallel connections. Each heating wire is selected with a specific resistance value appropriate for its location and heating requirements. This localized customization of electrical properties ensures that each zone operates within safe temperature limits, preventing overheating while maintaining effective heating efficiency in each specific area.
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 provides optimal heating performance similar to conventional systems at high voltages without overheating and reduces production costs by eliminating the need for a DC-DC converter, ensuring efficient de-icing of vehicle safety glass while maintaining low power consumption.
Implementation Method 1
a battery that applies a voltage to the plurality of heating wires
Data Source
AI summary
A heating wire apparatus for a vehicle safety glass includes: a plurality of bus bars located at a periphery of the vehicle safety glass; a plurality of heating wires having a serial pattern between the plurality of bus bars; and a battery that applies a voltage to the plurality of heating wires.