Abstract
The conversion efficiency of photovoltaic cells, charging distance and tracking technology are three important indicators of laser wireless charging technology. This paper demonstrates an efficient laser wireless charging scheme with variable charging distance and a simple tracking system. The laser wireless charging system proposed in this paper is mainly composed of 808nm laser, zoom beam expander, GaAs photovoltaic cell and energy management module. By increasing the uniformity of laser spot energy distribution, the conversion efficiency of GaAs photovoltaic cells reaches 35.3%. Reduce system cost by simplifying the tracking system. Using zoom beam expander, the charging distance ranges from 10 to 50 meters.
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