RESEARCH ON THERMAL-MECHANICAL FATIGUE CHARACTERISTICS OF STRATOSPHERIC AIRSHIP SOLAR CELL MODULE

Sun Kangwen; Hong Yang; Cui Haiwei; Liang Haoquan; Cheng Dongji

doi:10.19912/j.0254-0096.tynxb.2024-0642

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 455-462. DOI: 10.19912/j.0254-0096.tynxb.2024-0642

RESEARCH ON THERMAL-MECHANICAL FATIGUE CHARACTERISTICS OF STRATOSPHERIC AIRSHIP SOLAR CELL MODULE

Sun Kangwen, Hong Yang, Cui Haiwei, Liang Haoquan, Cheng Dongji

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Abstract

In order to optimize the lifespan of solar cell modules through thermal mechanical analysis, this paper establishes a thermal-mechanical model with fine structure, considering the glass transition of the intermediate film material at low temperatures and the tin solder plastic model. On this basis, this study investigates the thermal-mechanical stress caused by the mismatch in thermal expansion coefficients of the materials during the high-altitude environmental thermal cycling process. The study also compares the differences in tin solder joint fatigue life when using Ethylene-Vinyl Acetate（EVA）、Polyolefin Elastomer（POE） and Polyvinyl Butyral（PVB） as intermediate films. The results show that when POE is used as encapsulation material, the solder joint will have a longer fatigue life.

Key words

solar cells / fatigue damage / finite element method / stratospheric airship / life prediction

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Sun Kangwen, Hong Yang, Cui Haiwei, Liang Haoquan, Cheng Dongji. RESEARCH ON THERMAL-MECHANICAL FATIGUE CHARACTERISTICS OF STRATOSPHERIC AIRSHIP SOLAR CELL MODULE[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 455-462 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0642

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