Abstract
The technical barrier of Laser wireless power transmission (LWPT) mainly lies in the development of a high-power laser emitter and high conversion efficiency of the receiver. Under the middle/far transmission range, the receiving heat flux presents a fluctuating, random ununiform distribution which will aggravate the interactions of the optical-thermal-electrical field on solar cells and decrease the energy transfer efficiency. The current study constructed a multi-field coupled model of a single solar cell under ununiform heat flux distribution. An LWPT experimental platform has been built and tested to verify the modeling parameters of I-V relation formula changing with optical intensity and temperature. Based on the corrected parameters, the optical, thermal heat transfer, and electrical characteristics have been solved by the finite element method. It was found that the voltage, current and temperature profiles on PV cell are apparently influenced by the changing of beam irradiance, and enhancing the cooling of PV cell can dramatically increase electrical conversion efficiency for the LWPT systems.
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