Solar panel
A high efficiency configuration for a solar cell module comprises solar cells arranged in an overlapping shingled manner and conductively bonded to each other in their overlapping regions to form super cells, which may be arranged to efficiently use the area of the solar module.
1. A method for manufacturing a super cell from silicon solar cells, the method comprising:
arranging silicon solar cells in line with sides of adjacent silicon solar cells overlapping in a shingled manner and conductively bonded to each other to form a shingled string of solar cells, the solar cells in the string are electrically connected to each other in series; and
separating a first super cell from an end portion of the shingled string of solar cells, leaving a remaining portion of the shingled string of solar cells, wherein the separating comprises cutting one of the solar cells in the shingled string of solar cells thereby severing the electrical series connection of the shingled string of solar cells, the first super cell comprising a plurality of the silicon solar cells within the first super cell arranged in line with sides of adjacent silicon solar cells overlapping in a shingled manner and conductively bonded to each other to electrically and mechanically connect the silicon solar cells in series.
2. The method of claim 1 , comprising:
arranging additional silicon solar cells in line with the remaining portion of the shingled string of solar cells with sides of adjacent silicon solar cells overlapping in a shingled manner and conductively bonded to each other to extend the shingled string of solar cells; and
separating a second super cell from an end portion of the shingled string of solar cells, leaving a remaining portion of the shingled string of solar cells, the second super cell comprising a plurality of the silicon solar cells arranged in line with sides of adjacent silicon solar cells overlapping in a shingled manner and conductively bonded to each other to electrically and mechanically connect the silicon solar cells in series.
3. The method of claim 2 , wherein the first and second super cells are separated from a first end of the shingled string of solar cells, and the additional silicon solar cells are added to a second end of the shingled string of solar cells opposite from the first end.
4. The method of claim 1 , wherein separating the first super cell from the shingled string of solar cells comprises making a first laser cut in a solar cell in a direction transverse to a long axis of the shingled string of solar cells.
5. The method of claim 4 , comprising melting the conductive bond between a portion of a cut solar cell remaining attached to the shingled string of solar cells and the solar cell to which it is bonded to remove that portion of the cut solar cell from the shingled string of solar cells.
6. The method of claim 4 , comprising:
operating a first conveyor belt to advance the shingled string of solar cells across a gap between the first conveyor belt and a second collinearly arranged conveyor belt, the shingled string of solar cells thereby supported by the first conveyor belt and the second conveyor belt; and
making the first laser cut through a solar cell positioned over the gap between the first conveyor belt and the second conveyor belt to separate the first super cell from the shingled string of solar cells.
7. The method of claim 6 , wherein after the first laser cut is made the remaining portion of the shingled string of solar cells is supported by the first conveyor belt and the first super cell is supported by the second conveyor belt, comprising operating the second conveyor belt to increase a distance separating the first super cell from the remaining portion of the shingled string of solar cells.
8. The method of claim 1 , wherein separating the first super cell from the shingled string of solar cells comprises melting a conductive bond between two adjacent solar cells, thereby separating the first super cell from the shingled string of solar cells.
9. The method of claim 8 , comprising making a laser cut in a direction transverse to the long axis of the first super cell in a solar cell that is located at an end of the first super cell and overlaps a front surface of its adjacent solar cell, the laser cut trimming off a portion of the solar cell and thereby narrowing the solar cell.
10. The method of claim 1 , wherein separating the first super cell from the shingled string of solar cells comprises making a straight laser cut in a solar cell in a direction transverse to a long axis of the shingled string of solar cells.
11. The method of claim 1 , wherein separating the first super cell from the shingled string of solar cells comprises making a wavy laser cut in a solar cell in a direction transverse to a long axis of the shingled string of solar cells.
12. The method of claim 1 , wherein separating the first super cell from the shingled string of solar cells comprises making a laser cut in a solar cell in a direction transverse to a long axis of the shingled string of solar cells, the laser cut comprising a combination of straight and curved line segments.
13. The method of claim 1 , wherein separating the first super cell from the shingled string of solar cells comprises making a straight laser cut through a solar cell in a direction transverse to a long axis of the shingled string of solar cells.