Solar cell module

A solar cell module comprising:

• a first solar cell and a second solar cell each including a plurality of first and second electrodes, which are extending in a first direction on a back surface of a semiconductor substrate, the first and second solar cells being separated from each other in a second direction crossing the first direction, and the first solar cell and the second solar cell being adjacent to each other in the second direction to form a cell string;
• a plurality of first conductive lines extending m the second direction, electrically connected to the plurality of first electrodes in each of the first and second solar cells through a first electrode adhesive, and insulated to the plurality of second electrodes in each of the first and second solar cells using a first insulating layer selectively formed in the second electrodes;
• a plurality of second conductive lines extending in the second direction, electrically connected to the plurality of second electrodes in each of the first and second solar cells through a second electrode adhesive and insulated to the plurality of first electrodes in each of the first and second solar cells using a second insulating layer selectively formed in the first electrodes;
• and
• an interconnector configured to electrically connect the plurality of first conductive lines of the first solar cell to the plurality of second conductive lines of the second solar cell in order to form the cell string with the first solar cell and the second solar cell, and the interconnector being disposed between the first solar cell and the second solar cell and spaced apart from the first solar cell and the second solar cell,
• wherein the plurality of first conductive lines of the first solar cell and the plurality of second conductive lines of the second solar cell are overlapped and connected to the interconnector disposed between the first solar cell and second solar cell in order to form the cell string with the first solar cell and the second solar cell,
• wherein an electrode arrangement of the first solar cell, a first insulating layer arrangement of the first solar cell and a first electrode adhesive arrangement of the first solar cell are equal to an electrode arrangement of the second solar cell, a second insulating layer arrangement of the second solar cell and a second electrode adhesive arrangement of the second solar cell,
• wherein each of the plurality of first conductive lines and the plurality of second conductive lines is configured as a ribbon having a first surface and a second surface opposite the first surface, wherein the first surface is connected to the first and second electrodes and the interconnector, and the first surface is directly facing the first and second electrodes and the interconnector,
• wherein a connection region between the first surface and the interconnector is a region to which a thermal expansion stress is applied when the interconnector is connected to each of the first solar cell and the second solar cell, and
• wherein on the first solar cell or the second solar cell, a first area of a first connection portion that connects the first surface of each first conductive line of a first set of the plurality of first conductive lines to the interconnector is different than a second area of a second connection portion that connects the first surface of each first conductive line of a second set of the plurality of first conductive lines to the interconnector while an overlap length of the plurality of first conductive lines is the same.