光伏电池正向电流注入下的电流集边效应仿真分析OA北大核心CSTPCD

Aiming at the distribution of electrode surface current and cell surface temperature under the forward current injection condition of photovoltaic cells,the COMSOL Multiphysics simulation software was used to establish and analyze the three-dimensional model of photovoltaic cell.Through the numerical simulation of the carriers transport process of photovoltaic cells under the condition of large current injection,the distribution of carrier current density along the busbar was obtained.The simulation results show that the transverse current density at the edge of the fingers reaches the peak due to the transverse transport process of the carriers inside the cells.Moreover,the total current density concentrate on the direction of the busbar and the fingers.With the increase of the applied voltage,the surface temperature of the cell also increases,and the highest point of the surface tem-perature concentrates on the root of the secondary busbar.The maximum allowable forward voltage threshold is calculated theoretically.