Thin, stretchable, universal wireless power transfer system for electric vehicle charging.

Area of Science:

• Electrical Engineering
• Materials Science
• Automotive Technology

Background:

• Conventional wireless power transfer for electric vehicles faces challenges with charging efficiency and universal application across different car models.
• Existing systems often struggle with maintaining performance over varying distances and physical configurations.

Purpose of the Study:

• To develop a stretchable wireless power transfer (SWPT) system that offers improved universality and consistent charging efficiency for electric vehicles.
• To overcome the limitations of fixed-position coils in current wireless charging solutions.

Main Methods:

• Designed thin, stretchable inductive coupling coils with serpentine shapes for enhanced flexibility.
• Optimized coil winding design using treble strand serpentine copper traces to improve stretchability and reduce electrical resistance.
• Integrated the SWPT system onto the roofs of two different electric vehicle models for practical testing.

Main Results:

• The SWPT system demonstrated stable charging efficiencies despite the coils undergoing bending and stretching.
• The system maintained consistent performance when applied to different electric vehicle models, showcasing its universality.
• Optimized coil design successfully enhanced stretchability and decreased resistance.

Conclusions:

• The developed SWPT system offers a stretchable, convenient, and universal solution for high-performance electric vehicle charging.
• This technology presents a novel approach to address the limitations of current wireless power transfer systems in automotive applications.
• The stable performance under various conditions validates the potential of SWPT for future EV charging infrastructure.