薄膜太阳能电池弯曲疲劳极限检测系统的设计及制造

Design and Manufacture of Bending Fatigue Testing Machine for Thin-film Solar Cells

设计并制造了一套薄膜太阳能电池弯曲疲劳极限检测系统,通过定位机构对电池进行预紧固定,在电机驱动下利用机械运动机构,实现了薄膜太阳能电池的循环弯曲,并开发PLC系统精确控制电池在弯曲角度时的曲率半径和循环次数,分析了曲率半径与弯曲应力之间的数学关系,通过检测电池的输出电压,最终确定不同循环次数下电池的弯曲疲劳极限.该仪器操作简单,成本低廉,可应用于各类薄膜太阳能电池的弯曲疲劳性能检测.

A bending fatigue testing machine is designed and manufactured in this study.We pre-tighten and fix the solar cell by a positioning mechanism,and realize the cyclic bending of thin-film solar cell through mechanical motion mechanism driven by a motor.We also develop the PLC system for precise control of the bending radius of curvature and cycle times.The mathematical relationship between the bending radius of curvature and the bending stress is analyzed,and the bending fatigue limit of the cell with different numbers of cycle is determined by detecting the output voltage of the battery.The machine is simple to operate and the cost is low,so it can be used to detect the bending fatigue performance of all kinds of thin-film solar cells.