A Load-Independent Battery Charging System for Multiple Wearable Devices Using Conductive Textile

This letter introduces a novel battery charging solution for multiple wearable devices. Using conductive textile interwoven into clothing, our system provides the convenience of on-body charging and the capacity to charge multiple devices concurrently from a single charger. The uniqueness of our approach lies in its capability to achieve load-independent constant current (CC) and constant voltage (CV) charging using a minimalistic component configuration and permitting each device to independently control its charging mode. Empirical results confirm a variation of less than 5% for both CC and CV charging, whereas theoretical evaluations suggest the system's potential to be scaled up to support an infinite number of devices.