ScholarWorks@성균관대학교

초록

The installation of solar power is increasing globally due to the strengthening of renewable energy transition policies, while initiatives like RE100 are accelerating sustainability in the domestic market. In the manufacturing process of solar modules, soldering metal ribbons to the busbars of solar cells is an essential step. However, the high-temperature soldering method poses risks of cell damage due to differences in thermal expansion coefficients and stress caused by heat. These issues are particularly pronounced when soldering metal ribbons to half-cut solar cells at both ends to connect shingled strings, as the process may lead to string warping. This study proposes a method to address these challenges by using electrically conductive adhesives (ECA) to bond metal ribbons. Experimental results demonstrate that stable metal ribbon connections can be achieved even at a reduced temperature of 150°C, compared to the conventional high-temperature process at 350°C, with an efficiency loss of approximately 1.325%. These findings indicate that ECA-based bonding methods offer an effective alternative for the manufacturing of shingled solar modules.

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