A Study of Optimal Manufacturing Parameters with Lead-Free Solder on the c-Si Photovoltaic Cells by Using Hot-Air Tabbing
| Autor: | Wu-Chang Yang, 楊武璋 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 Soldering and encapsulating of solar cells are the main processes for the photovoltaic modules. The quality of soldering process will affect the efficiency of the module directly. Poor soldering process will damage or crack the solar cell, even induce the reliability problem, and decrease the output power and lifetime of solar module seriously. The power loss is one of the main factors to determine output power of module. According to the manufacturing processes, the power loss will drop approximately 10.65% (relative value) after Lead-free soldering crystalline silicon(c-Si) solar cells. The Lead-free eutectic point's melting temperature is about 220℃. In practice, it is up to 280℃ when soldering. Besides, when wetting is poor, it also raises the difficulty in soldering technology. Therefore, if the loss of power could be reduced during the soldering process, it will be able to raise the module efficiency successfully. In this study, Response Surface Method (RSM) is used to analysis the effect factors of grooving quality for soldering quality during the strategic experiments. At first, list the quality factors that will influence the soldering quality of solar cells, and choose the control factors to set their levels, such as the soldering hot-air temperature, the solar cell temperature on preheating platform, soldering time, flux, and etc. Secondly, choose the quality factors and levels. The experimental design of Zero-Order is under RSM. The measurement will perform on a device to test the peel strength and Peel length between the ribbon and busbar on the surface and efficiency after soldering. In experimental results, RSM can build the effective mathematics model of response characteristics. It is benefit various parameters setting to estimate the response characteristics. Finally, proceeding the soldering process of solar cells are using the optimum collocation of parameters which have been calculated by the RSM. The average loss of the power after soldering is 4.688%. Compare to original procedure, the average decline amount is 10.65%, the optimization process in this research can reduce 5.962% loss.Therefore, the RSM for the optimization of soldering parameters can improve the quality of hot air soldering process efficiently. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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