Welding method for photovoltaic cell and photovoltaic module

A photovoltaic module, comprising:

• a cell string formed by connecting a plurality of cells in sequence, with two adjacent cells of the plurality of cells being connected to each other by a welding method for a photovoltaic cell;
• a packaging layer configured to cover a surface of the cell string;
• and
• a cover configured to cover a surface of the packaging layer away from the cell string,
• wherein the two adjacent cells comprise a first cell and a second cell that are welded to each other by a solder strip;
• and
• wherein the welding method for the photovoltaic cell comprises:
• providing a substrate of each of the first cell and the second cell, and providing a first solder layer at a preset position of the substrate where an electrode pad of the substrate is located;
• and
• lapping one end of the solder strip on the first solder layer of the first cell, lapping another end of the solder strip on the first solder layer of the second cell, and connecting the first cell and the second cell together by welding.