光伏电池正向电流注入下的电流集边效应仿真分析  

Simulation and analysis of current edge effect of photovoltaic cells under forward current injection condition

作　　者：刘畅[1] 于辉[2] 吴龙军 田丽[1] LIU Chang;YU Hui;WU Longjun;TIAN Li(Harbin Institute of Technology,Harbin Heilongjiang 150001,China;Tianjin Institute of Power Sources,Tianjin 300384,China)

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001 [2]中国电子科技集团公司第十八研究所,天津300384

出　　处：《电源技术》2024年第6期1147-1153,共7页Chinese Journal of Power Sources

摘　　要：针对光伏电池在正向电流注入条件下,电极表面电流分布及电池表面温度分布情况,采用COMSOL Multiphysics仿真软件对光伏电池进行建模仿真。建立三维光伏电池模型,通过数值模拟光伏电池在大电流正向注入情况下的载流子输运过程,求解载流子电流密度沿主栅方向分布。仿真结果表明:由于电池片内部载流子的横向输运过程,细栅边缘处横向电流密度达到峰值,且总电流密度向细栅、主栅方向集中;随着外加电压的增大,电池片表面的温度也不断升高,且表面温度最高点集中在次主栅根部,理论求解出最大允许正向电压阈值。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 temperature concentrates on the root of the secondary busbar.The maximum allowable forward voltage threshold is calculated theoretically.

关 键 词：光伏电池 热失效 电流集边 COMSOL仿真 

分 类 号：TM615[电气工程—电力系统及自动化]