Flexible solar cell array suitable for near space super long endurance aircraft

Abstract

The invention relates to a flexible solar cell array suitable for a near space super long endurance aircraft, and belongs to the physics power supply technical field; the flexible solar cell array comprises a transparent fluorine containing polymer film, a polyolefin glue film, a cell string, a polyolefin glue film, and a transparent or white polymer film stacked in order from top to bottom; the cell string uses flexible multijunction gallium arsenide cells as generating units, and the cell overlapping contact mode can realize the series-parallel connections between the cells; a bus bar uses silvering copper cores to braid flat flexible cords; the assembly top surface uses the fluorine containing polymer film, and the bottom surface uses the transparent or white polymer film for packaging; a bonding agent employs the hot melt polyolefin glue film; the front side and back side of the cell string are respectively hot melt bonded with the fluorine containing polymer film and / or the white polymer film; the flexible solar cell array is formed by one time high temperature lamination. The flexible solar cell array is firm and reliable, small in quality surface density, high in energy utilization rate, and can be bended and twisted.

Description

technical field [0001] The invention belongs to the technical field of physical power sources, and in particular relates to a flexible solar cell array suitable for ultra-long endurance aircraft in adjacent space. Background technique [0002] At present, ultra-long-endurance vehicles in near space mainly use solar energy as the main energy source. The main types include solar drones, electric powered solar airships and aerostats, etc. Due to the high flying altitude, slow flying speed and long flying time of this type of aircraft, high technical requirements are put forward for the solar cell array which undertakes the power generation function. One is to have a higher conversion efficiency. At present, there are two main types of solar cell arrays used in near-space ultra-long-endurance aircraft, one is a semi-flexible solar cell array based on crystalline silicon rigid cells, and the other is based on flexible thin-film cells (such as copper indium gallium selenide, amo...

AI Technical Summary

Problems solved by technology

Although the solar cell modules manufactured by this process can have long-term power generation capacity, they are heavy and inflexible, which limits their use on near-space vehicles

Even if transparent PET is used instead of glass, it is still difficult to meet the surface density requirements

[0004] The semi-flexible solar cell array described in CN201410655911.8 is a component that can be partially bent only in the folded position, and thin crystal silicon rigid cells are used as power generation units, which cannot avoid the fragmentation of solar cells caused by internal bending or torsional forces. Therefore, the part containing the battery must be reinforced with an aluminum honeycomb panel with a thickness of not less than 3mm. Although the simple aluminum honeycomb panel has been widely used in the aerospace field, its structural density is at least 600g / m2, so adding the battery After the weight of the glue and the weight of the solar cell array will not be less than 900g / m 2 , the conversion efficiency of the whole array is not higher than 19%, etc.

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