Efficiency Of Wireless Power Transmission Via Laser

This project designed to use the space Laser remote charge technology to improve the MAV andother small automated machines less working time and poor battery life. Mainly researched formechanism of a variety of solar cells photoelectric conversion and using different wavelength laserswith different power, experimentally measured the conversion efficiency of the commonly used solarcells, obtained the relationship of conversion efficiency with a high-intensity laser irradiation.Firstly, mainly expound the purpose and significance of long-range charging, summarized andanalyzed several commonly technology used for wireless power transmission, the characteristics foreach technology, combined with the subject requirements, then selected remote laser chargingtechnology. Comprehensively summarized the various factors of laser energy propagation byanalyzing the various effects of laser transmission in the atmosphere, for a reasonable selection for thelaser wavelength, the laser energy transfer efficiency provided a theoretical basis. Described thevarious types of lasers used in this project works.Second, by introduced the basic structure of the solar cells working principle and photoelectricconversion efficiency, in accordance with the theory of thermodynamic detailed balance, analysed andcalculated the conversion efficiency of an ideal battery, from which derived the relationship ofefficiency with material band gap, temperature, etc. factors, then obtained working conditions toachieve the best conversion efficiency for the experiment. In the direction of the efforts to improve theconversion efficiency, chose different wavelength, different density lasers to irradiate, then comparedand analysed with experimental results.In addition, this paper came up with using several beams of lasers to irradiate solar cells togetherto improve the conversion efficiency of photovoltaic cells. The highest conversion efficiency ofmonocrystalline silicon cell up to27.7%and the highest conversion efficiency of triple-junction GaAscells up to35%. Therefore, the research results on the laser power transmission technology have acertain reference value.