Abstract:
A solar cell module (100), a manufacturing method thereof, and a solar cell unit are disclosed. The solar cell module (100) includes an upper cover plate (10), a front adhesive layer (20), a cell (31), a back adhesive layer (40) and a back plate (50) superposed in sequence, a secondary grid line (312) being disposed on the cell (31), a conductive wire (32) constituted by a metal wire being disposed between the front adhesive layer (20) and a front surface of the cell (31), a welding layer disposed on a welding position where the conductive wire (32) and the secondary grid line (312) are welded, the welding layer being an alloy containing Sn, Bi and at least one of Cu, In, Ag, Sb, Pb and Zn, in which an amount of Bi is 15 to 60 weight percent.