SOLAR CELL UNIT, SOLAR CELL ARRAY, SOLAR CELL MODULE AND MANUFACTURING METHOD THEREOF

摘要

A solar cell unit, a solar cell array (30), a solar cell module (100) and a manufacturing method thereof are disclosed. The solar cell unit includes a cell (31) which consists of a cell substrate (311) and a secondary grid line (312) disposed on a front surface of the cell substrate (311); a conductive wire (32) intersected and welded with the secondary grid line (312), and the secondary grid line (312) having a width in a welding position with the conductive wire (32) greater than a width thereof in a non-welding position.