Solar cell module and method and device for repairing the same
View Patent ↗A solar cell module and a method and a device for repairing the solar cell module are disclosed. The method for repairing a defective solar cell of the solar cell module includes cutting a plurality of wiring members electrically connecting the defective solar cell to a normal solar cell at a back surface of the solar cell module and forming previous wiring members of the normal solar cell, so that a cutting position of the plurality of wiring members is not seen from a front surface of the solar cell module, positioning a connection bar at the back surface of the solar cell module such that the connection bar crosses the cut previous wiring members of the normal solar cell and replaceable wiring members of a new solar cell, and electrically connecting the previous wiring members, the replaceable wiring members, and the connection bar.
1. A method for repairing a defective solar cell of a solar cell module, in which a plurality of adjacent solar cells are connected to one another through ten or more wiring members having a wire shape with a thickness of 300 μm to 500 μm to be physically separated, the method comprising:
cutting a plurality of wiring members electrically connecting the defective solar cell to a normal solar cell at a back surface of the solar cell module and forming previous wiring members of the normal solar cell, so that a cutting position of the plurality of wiring members is not seen from a front surface of the solar cell module;
positioning a connection bar at the back surface of the solar cell module such that the connection bar crosses the cut previous wiring members of the normal solar cell and replaceable wiring members of a new solar cell; and
electrically connecting the cut previous wiring members, the replaceable wiring members, and the connection bar,
wherein the connection bar is positioned between the previous wiring members of the normal solar cell and the replaceable wiring members of the new solar cell, and
wherein the previous wiring members of the normal solar cell is positioned closer to the back surface of the solar cell module than the replaceable wiring members of the new solar cell.
2. The method of claim 1 , wherein the electrically connecting operation includes soldering the previous wiring members, the replaceable wiring members, and the connection bar to electrically connect the previous wiring members, the replaceable wiring members, and the connection bar.
3. The method of claim 2 , wherein the connection bar is formed of one of the plurality of wiring members.
4. The method of claim 3 , wherein each wiring member of the plurality of wiring members includes a core layer formed of a metal material and a coating layer coating the core layer with a solder including at least one of Pb and Sn.
5. The method of claim 1 , wherein a back surface of the new solar cell includes a margin area not including a back electrode and a cell area not including the margin area, and
wherein the cutting position is located in the margin area.
6. The method of claim 5 , wherein the connection bar crosses all of the previous wiring members and all of the replaceable wiring members in the margin area.
7. The method of claim 6 , wherein the previous wiring members and the replaceable wiring members are parallel but not collinear.
8. The method of claim 2 , wherein the soldering operation includes heating the previous wiring members, the replaceable wiring members, and the connection bar using an ultraviolet lamp, which is positioned opposite a hot plate at a front surface of the new solar cell, in a state where the previous wiring members, the replaceable wiring members, and the connection bar are fixed using the hot plate at a back surface of the new solar cell.
9. The method of claim 1 , wherein the cut previous wiring members of the normal solar cell are not aligned and not overlapped in a vertical direction with the replaceable wiring members of the new solar cell at the connection bar.