Wireless charging for Li-Ion battery using a printable Conformal SCMR

A wireless charging system for a lithium-ion (Li-Ion) rechargeable battery using printable Conformal Strongly Coupled Magnetic Resonance (CSCMR) is proposed. This charging system could be used for implantable devices or small portable electronic devices. The charging circuit consists of the transmitter (TX) and receiver (RX) elements along with the RF-to-DC bridge rectifier and a LTC4070 designed on a PCB. It takes 18 minutes to charge a coin cell Li-Ion battery.