Perforated Solar Cell Substrate for Repeated Bending Resistance
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Solution Overview
Problem
Solar cell substrates made of plastic are prone to developing bending marks, damage, or fracture due to repeated bending, which affects their performance.
Innovation Solution
Incorporating through-holes in the first film layer of the substrate, which allows the layer to bend more easily and reduces stress during deformation, thereby enhancing bending resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plastic substrate is used for solar cells, then the substrate is flexible and can be bent, but the substrate develops bending marks, damage, or fracture due to repeated bending
Solution Approach 1:
The patent introduces through-holes (porous structure) in the plastic substrate to reduce stress concentration during bending. The through-holes allow the substrate to deform more easily by providing stress relief points, preventing the development of bending marks and reducing the risk of fracture while maintaining flexibility.
Solution Approach 2:
The patent applies a coating layer on the plastic substrate to create a composite structure. The coating layer with appropriate mechanical properties enhances the bending resistance of the substrate while maintaining its flexibility, solving the contradiction between adaptability and reliability.
2Duration of action of moving object
If the substrate undergoes repeated bending, then the substrate maintains flexibility, but the substrate experiences stress that leads to damage or fracture
Solution Approach 1:
The through-holes in the substrate act as stress relief points that prevent stress accumulation during repeated bending cycles. This porous structure allows the substrate to withstand a greater number of bending cycles without developing bending marks or suffering damage, thereby extending service life while maintaining stress resistance.
Solution Approach 2:
The coating layer is applied beforehand to the substrate to provide protective cushioning against stress and damage during repeated bending. This pre-applied protective layer enhances the substrate's durability and stress resistance before actual use.
Data Source
AI summary
A substrate, a solar cell, a photovoltaic system, and an electric device are provided. The substrate includes a first film layer, where at least one through-hole is provided on the first film layer. When the substrate undergoes bending, the first film layer bends and deforms accordingly. Since the through-hole is provided on the first film layer, the through-hole can reduce stress experienced by the first film layer surrounding the through-hole due to bending, thereby improving bending resistance of the first film layer, and further improving bending resistance of the substrate. This reduces a risk that the substrate develops bending marks, fractures, or breaks during repeated bending.