Solar PV-Based Mobile Phone Battery Charger

This paper demonstrates solar PV (SPV) based mobile battery charging architecture employing a power electronics (DC-DC buck type) converter. The perturb and observe MPPT optimization algorithm is used to harvest the utmost power from the SSPV. In the DC-DC (buck) converter, a blocking diode is connected at the output side of the SPV to prevent the reverse current flow from the battery to the battery charger (DC-DC converter). The controller charges the mobile battery in three modes i.e., float charging stage, MPPT bulk charging stage and a steady voltage absorption stage. The studied mobile charging system is analyzed in MATLAB/Simulink environment. To incorporate the partially shading condition in the SPV of the proposed system, the solar irradiance of the SPV is decreased from 1000 W/m<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> to 400 W/m<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> for the time instance <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$t$</tex> = 30 s to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$t$</tex> =40 s. This partial shading condition of the SPV is incorporated to observe the charging performances of the mobile battery by using a mobile battery charger controller. The performance evaluation of the proposed system designed in MATLAB/Simulink is carried out in terms of the dynamic performance of SPV and the mobile battery with charge controller.