Wireless Charging for Smart Garment with Textile-based Receiver Coils

Wireless-charging hanger and drawer systems with conductive textile receiver coils are reported in this paper. Both systems can be used to conveniently charge Li-ion batteries in smart garments with embedded sensors. The receiver coils fabricated with conductive textile greatly enhance comfort, flexibility, and foldability of garments. The frequency used for wireless charging is 400 kHz. For the hanger system, the maximum charging power can reach 200 mW with 25.5% dc-dc efficiency. For the drawer system, maximum charging power for one garment is 307 mW with 10.5% dc-dc efficiency.