光伏组件晶体硅电池片应力分析

STRESS ANALYSIS OF CRYSTALLINE SILICON SOLAR CELLS IN PV MODULE

基于最小势能原理导出光伏组件晶体硅电池片位移场及应力场的级数解,并对面板尺寸为1580 mm×808 mm的195W单晶硅标准组件在风荷载作用下晶体硅电池片的应力进行计算和分析,考虑不同风压及EVA胶膜的厚度和剪切模量变化时对应力的影响。结果表明:最大应力发生在电池片的中点,电池片的应力随EVA胶膜剪切模量的增加而呈非线性增大,随EVA胶膜厚度的增加而呈非线性减小。

The series solution of displacement field and stress distribution of the crystalline silicon solar cells in PV module was developed based on the principle of minimum potential energy. The stress calculation and analysis for crystalline silicon solar ceils in PV module with a size of 1580 mm×808 mm under wind load were performed, and the effect of the various wind pressure, the variation of thickness and shearing modulus of EVA film on stress were taken into account in calculation. The results show that the maximum stress （Von Mises stress） occurs at the middle of the cell, the stress increases non-linearly with increasing shearing mudulus of EVA film, however, decreases non-linearly with increasing thickness of the EVA film.