  Distributed laser charging (DLC) is a wireless power transfer technology for
mobile electronics. Similar to traditional wireless charging systems, the DLC
system can only provide constant power to charge a battery. However, Li-ion
battery needs dynamic input current and voltage, thus power, in order to
optimize battery charging performance. Therefore, neither power transmission
efficiency nor battery charging performance can be optimized by the DLC system.
We at first propose an adaptive DLC (ADLC) system to optimize wireless power
transfer efficiency and battery charging performance. Then, we analyze ADLC's
power conversion to depict the adaptation mechanism. Finally, we evaluate the
ADLC's power conversion performance by simulation, which illustrates its
efficiency improvement by saving at least 60.4% of energy, comparing with the
fixed-power charging system.
