The photovoltaic (PV) cell fracture reduces the efficiency of solar PV modules and the residual stresses generated in the silicon cells by various stages of manufacturing process are attributed as one of the primary reasons among others. In this study, a unified approach to investigate the residual stresses present across the PV module owing to differing material properties and thermal cycles during manufacturing process is attempted. In particular, an in-plane residual stress map for different layers of solar PV module and the stress jump across the layered structure arisen during the manufacturing process are quantified through finite element method by considering ethylene vinyl acetate encapsulant as a linear viscoelastic material. The maximum residual stress presence in the cell is observed during the encapsulant curing cycle of lamination process. The predictions on the stress pattern and magnitudes from the simulations collaborate well with the experimental observations reported in literature.

中文翻译：

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太阳能光伏组件的面内残余应力图：计算制造过程的统一方法


光伏（PV）电池断裂降低了太阳能光伏组件的效率，而制造过程的各个阶段在硅电池中产生的残余应力被认为是主要原因之一。在本研究中，尝试采用统一的方法来研究由于制造过程中不同的材料特性和热循环而导致光伏组件中存在的残余应力。特别是，将乙烯醋酸乙烯酯封装材料视为线性粘弹性材料，通过有限元方法量化太阳能光伏组件不同层的面内残余应力图以及制造过程中出现的跨层结构的应力跳跃。在层压过程的封装剂固化周期期间观察到电池中存在的最大残余应力。模拟对应力模式和强度的预测与文献中报告的实验观察结果吻合良好。