Jun 15,2024
Polymer materials for photovoltaic modules to reduce weight
The heart of the lightweight flexible assembly lies in the transparent front plate.
As the size of photovoltaic cells becomes larger and larger, from 125mm * 125mm in the early stage to 210mm * 210mm or more, the weight of regular photovoltaic modules becomes heavier and heavier, reaching nearly 35Kg, and the unit weight also increases to 12.4kg/m. Considering 3-6kg/m such as mounting brackets, the unit weight is about 16kg/m, which is difficult to bear for some load-bearing limited scenarios, including industrial plants.
To reduce the weight of components, component developers first consider thinning glass and optimizing aluminum alloy frames. For example, the thickness of the glass is reduced from 3.2mm to 2.0mm, and the weight is reduced by about 3kg/m². However, the thinned glass reduces the strength of the component. From a design perspective, it also limits the size of the components. Moreover, the glass components are fragile during transportation and construction, and there are potential safety hazards.
Recently, with the deepening of research, some high-performance polymer materials not only have light weight, can achieve light transmission, good weather resistance, good packaging performance, but also have good flexibility, making non-glass packaging possible and greatly reducing The weight of the component, lightweight components can be mainly used in projects where the load is insufficient or the roof cannot penetrate.
At present, the weight of the flexible component is basically below 5Kg/m, the conversion efficiency reaches about 20%, and the component power is about 380~520W.
The core of the lightweight flexible component lies in the transparent front plate. In addition to good light transmittance and UV resistance, the transparent front plate also needs to provide certain mechanical strength, wind resistance, hail impact resistance and other weather resistance and other packaging materials. Matching thermal expansion coefficient. Typical front plate materials are ETFE, fluorocarbon resin, PVF, PVDF, etc.
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