空间太阳电池柔性封装材料与技术研究进展

Based on the mission requirements of deep space exploration, space power stations, commercial aerospace, micro-nano satellites and long-endurance near-space flight, high efficiency, light weight, flexibility and high reliability are the development themes of space solar array. Solar arrays are developed from traditional rigid array and semi-rigid array to fully flexible array. The spacecraft needs to be exposed to charged particle radiation, ultraviolet radiation and atomic oxygen environment during in-orbit service. Therefore, it is necessary to encapsulate a protective layer on the surface of solar cell to slow down the degradation. As the radiation shielding layer for solar cells, the radiation protection, optical and mechanical properties of cover sheet are the most important. In this paper, the research progress of flexible packaging materials for solar cells, such as polysilsesquioxane, transparent polyimide and pseudomorphic glass were summarized. And the relevant space environment simulation test and in-orbit exposure results were also discussed. Finally, the development and application of flexible packaging materials and technologies for solar cells were prospected.