Packaging method for solar cell module, connection method for solar cell string, solar cell module, and preparation method therefor

A solar cell module, comprising a plurality of cell strings, wherein each cell string comprises:

• a plurality of cells, each being printed with fine grid lines and without a main grid;
• and
• a plurality of welding strips, connecting two adjacent cells to form the cell string, wherein the welding strips are fixed on corresponding cells through colloids, and the welding strips are in direct contact with the fine grid lines on the corresponding cells, and
• wherein the plurality of cell strings form a cell module by typesetting and welding bus bars, and
• each welding strip forms an alloy connection with the fine grid lines on a surface of the corresponding cell through heating and laminating.

A connection method for a solar cell string, comprising:

• S31, providing a cell;
• S32, arranging welding strips on a front surface and a back surface of the cell;
• S33, applying adhesive to designated positions on the front surface and the back surface of the cell to form colloids, and connecting the cell and the welding strips through the colloids;
• and
• S34, repeating step S31 to step S33 to complete connection of a preset number of cells, so as to obtain the solar cell string.

A connection method for a solar cell string, wherein the cell string comprises a plurality of cells connected in series, two adjacent ones of the cells are connected through welding strips, and each of the welding strips comprises a first segment and a second segment, and wherein the connection method comprises:

• S41, arranging a first welding strip, and applying adhesive to an upper surface of the first segment of the first welding strip to form colloids;
• S42, arranging a cell on the first segment of the first welding strip, so that a back surface of the cell is connected to the first segment of the first welding strip;
• S43, applying the adhesive to preset positions on a front surface of the cell to form the colloids;
• S44, arranging the second segment of a second welding strip on the front surface of the cell, so that the second segment of the second welding strip is connected to the front surface of the cell;
• and
• S45:
• repeating steps S41-S44 to complete connection of a preset number of cells, so as to form the cell string.

A connection method for a solar cell string, wherein the cell string comprises a plurality of cells connected in series, two adjacent ones of the cells are connected together through welding strips, each of the welding strips comprises a first segment and a second segment, and the connection method comprises:

• S51, providing a cell, and applying adhesive to designated positions on a back surface of the cell to form colloids;
• S52, arranging the cell on the first segment of an arranged first welding strip, so that the back surface of the cell is connected to the first segment of the first welding strip;
• S53, applying the adhesive to designated positions on a front surface of the cell to form the colloids;
• S54, arranging the second segment of a second welding strip on the front surface of the cell, so that the second segment of the second welding strip is connected to the front surface of the cell;
• and
• S55, repeating steps S51 to S54 to complete connection of a preset number of cells, so as to obtain the cell string.