Solar cell module
A solar cell module includes an upper substrate, a lower substrate opposite the upper substrate, a solar cell panel positioned between the upper substrate and the lower substrate, the solar cell panel including a plurality of solar cells which are arranged in a matrix form and are connected to one another through a wiring member, a passivation layer configured to package the solar cell panel, a frame configured to surround an outer perimeter of the solar cell panel, a connection terminal configured to connect two adjacent strings in the solar cell panel, and a cover member configured to cover the connection terminal.
1. A solar cell module comprising:
a plurality of solar cells; and
a plurality of wiring members electrically connecting two adjacent solar cells of the plurality of solar cells in serial and forming a plurality of solar cell strings, each of the plurality of wiring members extending in a straight line in a first direction;
wherein each solar cell of the plurality of solar cells includes a first electrode that is disposed on a first side of that solar cell and that includes (i) a plurality of finger electrodes that each extend in a second direction transverse to the first direction, (ii) a plurality of connection eletrodes configured to interconnect the plurality of finger electrodes in a direction crossing the plurality of finger electrodes, and (iii) a plurality of contact pads disposed along each of the plurality of connection electrodes, each of the plurality of connection electrodes extending in the first direction parallel to the plurality of wiring members,
wherein a width of each of the plurality of wiring members is (i) greater than or equal to x1 μm, and is less than or equal to x2 μm, x1=3.1101×y 2 −90.552×y+911.2, x2=0.7225×y 2 −51.38×y+1162.1, where y denotes a number of the plurality of wiring members and y is less than or equal to 21, (ii) less than a width of each of the plurality of contact pads such that each wiring member does not fully cover each of the plurality of contact pads, and (iii) greater than a width of each of the plurality of connection electrodes such that each wiring member covers each connection electrode.
2. The solar cell module according to claim 1 , wherein a cross section of each of the plurality of wiring members has a circular shape.
3. The solar cell module according to claim 1 , wherein each of the plurality of solar cells includes a semiconductor substrate, an emitter region forming a p-n junction along with the semiconductor substrate, the first electrode connected to the emitter region, and a second electrode connected to a back surface of the semiconductor substrate.
4. The solar cell module according to claim 3 , wherein the plurality of wiring members is electrically connected to the first electrode or the second electrode of each solar cell, and a number of the plurality of wiring members connected to the first electrode or the second electrode of each solar cell is 6 to 21.
5. The solar cell module according to claim 1
wherein a width of each of the plurality of contact pads is greater than a width of each of the plurality of finger electrodes.
6. The solar cell module according to claim 1 , wherein the plurality of wiring members are positioned on the plurality of connection electrodes.
7. The solar cell module according to claim 1 , wherein a width of each of the plurality of contact pads is more than a width of each of the plurality of connection electrodes.
8. The solar cell module according to claim 1 , wherein the plurality of contact pads is selectively formed at crossings of the plurality of finger electrodes and the plurality of connection electrodes.
9. The solar cell module according to claim 1 , wherein the plurality of wiring members each have a width of 252.7 μm to 554 μm.
10. The solar cell module according to claim 5 , wherein a number of the plurality of contact pads connected to any one of the plurality of wiring members is smaller than a number of the plurality of finger electrodes connected to the any one of the plurality of wiring members.
11. The solar cell module according to claim 3 , wherein the plurality of wiring members connected to the first electrode and the plurality of wiring members connected to the second electrode are aligned with the semiconductor substrate being interposed therebetween.
12. The solar cell module according to claim 1 , further comprising an upper substrate, and a lower substrate opposite the upper substrate, wherein the plurality of solar cells is positioned between the upper substrate and the lower substrate.
13. The solar cell module according to claim 1 , further comprising:
a connection terminal electrically connecting at least two parallel adjacent solar cell strings of the plurality of solar cells via ends of the plurality of wiring members that extend past an edge of a solar cell that is at the end of a respective solar cell string in the at least two parallel adjacent solar cell strings.
14. The solar cell module according to claim 13 , further comprising:
a cover member covering the connection terminal, wherein a surface of the cover member is an inclined surface falling toward solar cells of the at least two parallel adjacent solar cell strings that are adjacent to the connection terminal and the cover member, wherein the cover member and the connection terminal are spaced apart from the edge of the solar cell that is at the end of its respective solar cell string in the at least two parallel adjacent solar cell strings.
15. The solar cell module according to claim 14 , wherein the inclined surface of the cover member includes uneven portions.
16. The solar cell module according to claim 14 , further comprising:
an upper substrate, and a lower substrate opposite the upper substrate, wherein the plurality of solar cells is positioned between the upper substrate and the lower substrate;
a transparent upper passivation layer positioned between the upper substrate and the plurality of solar cells; and
a transparent lower passivation layer positioned between the plurality of solar cells and the lower substrate,
wherein the cover member is positioned between the connection terminal and the transparent upper passivation layer.
17. The solar cell module according to claim 16 , wherein the cover member is formed of a same material as the lower substrate so that the cover member has a same color as the lower substrate.