研究目的
Investigating the impact of external loads on a string of shingled solar cells within a solar module laminate using FEM simulations to understand the mechanical reliability of ECA joints.
研究成果
The study concludes that while linear elasticity can be useful for comparative studies of geometric designs, viscoelastic modeling is necessary for accurate absolute stress and strain calculations in ECA joints. The findings highlight the importance of considering material properties and loading conditions in the design and reliability assessment of shingled solar cell interconnections.
研究不足
The study acknowledges the complexity of polymer mechanics and the challenges in accurately modeling viscoelastic behavior. The simulations do not account for non-linearities, finite strains, or plasticity, which may affect absolute stress and strain values. Experimental validation is needed to confirm the model's predictions.
1：Experimental Design and Method Selection:
FEM simulations were conducted to model the mechanical behavior of shingled solar cell strings under thermal and mechanical loads. Both linear elastic and viscoelastic material models were compared.
2：Sample Selection and Data Sources:
The study focused on shingled solar cell strings embedded in a module laminate, with materials including EVA encapsulant and ECA joints.
3：List of Experimental Equipment and Materials:
A NETZSCH Gabo Eplexor 500N high force DMA was used for material characterization. Materials included float glass, silicon, copper, silver, PET/ETFE backsheet, EVA, and ECA.
4：Experimental Procedures and Operational Workflow:
Thermal cycling and mechanical load tests were simulated. The models included constraints to suppress rigid body motion and applied loads to simulate real-world conditions.
5：Data Analysis Methods:
Stress and strain distributions were analyzed using Comsol Multiphysics, with a focus on the ECA joints' response to different loading conditions.
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