太阳电池多层复合结构试验及数值模拟研究

NUMERICAL SIMULATION RESEARCH OF PHOTOVOLTAIC CELL MULTILAYER COMPOSITE STRUCTURE

提出一种平流层飞艇用太阳电池多层复合结构，以封装后的刚性太阳电池片作为非对称蜂窝芯层的上表面，通过玻璃纤维网格布进行加强，以此对刚性太阳电池片进行柔性化处理。对不同结构形式进行三点弯曲对比试验，验证复合结构的等效弯曲弹性模量仅为封装后的2．41％，挠度增加了38．03％，有效改善了太阳电池片的柔性。通过对2、5和8mm不同蜂窝芯层厚度的复合结构进行对比试验和有限元仿真，引入柔性重量变化比的概念，优选5mm蜂窝芯层为太阳电池多层复合结构最佳选择。

The core consists of to improve the stiffness of flexible solar cells, a multilayer composite structure of solar cells to stratospheric airship was designed, in which rigid solar cell of encapsulation as the surface to asynnnetric honeycomb core. A glass fiber ribbon was used to improve the stiffness characteristic of the structure. It decreases the bending modulus of structural forms by 97.59% and 38.03% deflection increment. Then the different thicknesses of honeycomb core for the muhilayered structure under pressure was analyzed by FEM （ finite element method） software. Different thicknesses of honeycomb core also affect the thermal control problem between the photovoltaic cell multilayer composite structure and the airship envelope. Then, a thermal heat transfer model of multilayer composite structure is proposed, and the equivalent thermal conductivity coefficients of rigid solar cell of encapsulation and Nomex honeycomb are calculated based on the environment test. The load-deformation curves and the temperature profile of Photovohaic Cell muhilayer composite structure versus each thickness of honeycomb core. Considering the quality of the whole structure, the article finally gives the conclusion of the optimal thickness of honeycomb core with more detailed descriptions.In some way, our study can provide helpful support for further engineering applications of photovohaic cell multilayer composite structure on the surface of stratospheric airship.