COMPARATIVE STUDY ON MICROCRACK PROPAGATION OF PHOTOVOLTAIC MODULES WITH DIFFERENT ADHESIVE FILMS

Fang Qinghe; Jiao Bowen; Zhang Yuyun; Chen Zaixian; Guo Anxin

doi:10.19912/j.0254-0096.tynxb.2024-2268

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (5) : 595-602. DOI: 10.19912/j.0254-0096.tynxb.2024-2268

COMPARATIVE STUDY ON MICROCRACK PROPAGATION OF PHOTOVOLTAIC MODULES WITH DIFFERENT ADHESIVE FILMS

Fang Qinghe¹, Jiao Bowen¹, Zhang Yuyun^2,3, Chen Zaixian¹, Guo Anxin⁴

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Abstract

A numerical model was set up based on extended finite element method （XFEM） to investigate the mechanism of microcracks in silicon cells of photovoltaic （PV） modules with different adhesive films. The three-dimensional numerical model of photovoltaic modules was validated by existing experimental results. The influence of two different adhesive films, EVA and POE, on the microcrack propagation of photovoltaic modules under uniformly distributed external loads was studied with the validated numerical model. This study shows that： the photovoltaic module with POE material exhibits a more uniform stress distribution, less localized stress concentration and lower average stress in the silicon cells in comparison with EVA, which would reduce the probability of the appearance of initial cracks. The crack propagation process in the silicon cells located in the medium and high-stress zones is investigated by introducing an initial crack. For the silicon cells in the high-stress areas, the crack area in the silicon cell with POE material is approximately half of that with EVA material. The POE material delays the crack propagation significantly. The comparison results indicate that POE material exhibits better toughness and crack resistance, which is a more effective solution for suppressing the appearance of microcracks in photovoltaic modules.

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photovoltaic modules / microcracks / crack propagation / adhesive films / extended finite element method （XFEM）

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Fang Qinghe, Jiao Bowen, Zhang Yuyun, Chen Zaixian, Guo Anxin. COMPARATIVE STUDY ON MICROCRACK PROPAGATION OF PHOTOVOLTAIC MODULES WITH DIFFERENT ADHESIVE FILMS[J]. Acta Energiae Solaris Sinica. 2026, 47(5): 595-602 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2268

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