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 configured to electrically connect adjacent solar cells among the plurality of solar cells, each of the plurality of wiring members extending in a straight line in a first direction, wherein a number of the plurality of wiring members is greater than or equal to 6 and less than or equal to 21,
wherein each solar cell of the plurality of solar cells comprises a first electrode that is disposed on a first side of the solar cell, wherein the first electrode comprises (i) a plurality of finger electrodes that each extend in a straight line in a second direction transverse to the first direction, (ii) a plurality of connection electrodes configured to interconnect the plurality of finger electrodes in the first direction, and (iii) a plurality of contact pads disposed along each of the plurality of connection electrodes, and
wherein each of the plurality of wiring members has a width that is (i) greater than a width of each of the plurality of connection electrodes such that each wiring member covers each connection electrode, (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 or equal to 252.7 μm and less than or equal to 530 μm.
2. The solar cell module of claim 1 , wherein a cross-section of each of the plurality of wiring members has a circular or a rounded shape.
3. The solar cell module of claim 1 , wherein each solar cell of the plurality of solar cells further comprises a second electrode disposed on a second side, opposite the first side, of the solar cell, and
wherein, for each of the plurality of solar cells, the plurality of wiring members comprises (i) a first plurality of wiring members disposed on the first side of the solar cell, and (ii) a second plurality of wiring members disposed on the second side of the solar cell.
4. The solar cell module of claim 3 , wherein, in the first electrode:
the plurality of finger electrodes are disposed perpendicularly to the first plurality of wiring members, and
the plurality of contact pads are disposed at a crossing between a respective one of the plurality of finger electrodes and a respective one of the first plurality of wiring members.
5. The solar cell module of claim 3 , wherein each of the first plurality of wiring members is arranged lengthwise along a respective one of the plurality of connection electrodes.
6. The solar cell module of claim 3 , wherein, in the first electrode, each of the plurality of contact pads has a length or a width that is greater than a width of each of the plurality of finger electrodes.
7. The solar cell module of claim 3 , wherein the plurality of finger electrodes and the plurality of contact pads are made of Ag.
8. The solar cell module of claim 3 , wherein the second electrode comprises a plurality of bus electrodes disposed lengthwise along a direction of the second plurality of wiring members, and configured to transfer charge carriers from a semiconductor substrate of the solar cell to the second plurality of wiring members.
9. The solar cell module of claim 8 , wherein each of the plurality of bus electrodes of the second electrode are disposed perpendicularly to each of the plurality of finger electrodes of the first electrode.
10. The solar cell module of claim 8 , wherein the second electrode is made of Al.
11. The solar cell module of claim 8 , wherein the plurality of bus electrodes of the second electrode are made of Ag.
12. The solar cell module of claim 3 , wherein each of the plurality of wiring members has a metal core and a solder coating layer on the metal core.
13. The solar cell module of claim 12 , wherein the plurality of wiring members is soldered to at least one of the first electrode or the second electrode.
14. The solar cell module of claim 3 , wherein each solar cell of the plurality of solar cells further comprises a semiconductor substrate having a pseudo-square shape with four inclined edge corners, and
wherein the plurality of wiring members are arranged to not overlap any of the four inclined edge corners.
15. The solar cell module of claim 3 , further comprising a connection terminal having a rectangular cross section to connect the first plurality of wiring members and the second plurality of wiring members of two adjacent strings of solar cells.