Solar cell module having a conductive pattern part
View Patent ↗A solar cell module is discussed. The solar cell module includes a plurality of solar cells each including a plurality of first current collectors and a plurality of second current collectors, a first protective layer positioned on incident surfaces of the solar cells, a transparent member positioned on the first protective layer, and a conductive pattern part positioned on non-incident surfaces of the plurality of solar cells. The conductive pattern part includes a first pattern having a plurality of first protrusions connected to first current collectors of one solar cell and a second pattern having a plurality of second protrusions connected to second current collectors of the one solar cell. The plurality of first current collectors and the plurality of second current collectors are positioned on a surface of each solar cell on which light is not incident.
1. A solar cell module, comprising:
a back sheet made of an insulating material;
a conductive pattern part positioned over the back sheet, the conductive pattern part including a first pattern and a second pattern;
a plurality of solar cells positioned over the conductive pattern part, each solar cell including a first electrode, and a second electrode, the first and second electrodes being positioned on a back surface, which is opposite to a light incident surface of the each solar cell;
an insulating member positioned between the plurality of solar cells and the conductive pattern part, the insulating member comprising a plurality of openings exposing the first electrode and the second electrode, respectively;
a front substrate positioned on a front surface of the plurality of solar cells;
an upper protective layer between the front substrate and the plurality of solar cells; and
a lower protective layer between the back sheet and the plurality of solar cells,
wherein each of the first and second patterns has a plurality of protrusions being opposite to each other, the protrusions of the first pattern are connected to the first electrode of each solar cell, the protrusions of the second pattern are connected to the second electrode of each solar cell, and the protrusions of the first pattern are spaced apart from the protrusions of the second pattern in an overlapping area of each solar cell,
the protrusions of the first pattern are connected to the first electrode through the plurality of openings of the insulating member, the protrusions of the second pattern are connected to the second electrode through the plurality of openings of the insulating member, and the first and second patterns are connected to each other in an area between two adjacent solar cells so that the first electrode of one solar cell of two adjacent solar cells is connected to the second electrode of another solar cell of the two adjacent solar cells,
the plurality of openings are filled with a conductive adhesive to electrically connect the first electrode to the first pattern and the second electrode to the second pattern,
each of the first electrode and the second electrode includes a plurality of elongated portions extended in a first lengthwise direction, and the plurality of elongated portions of the first electrode extended in the first lengthwise direction and the plurality of elongated portions of the second electrode extended in the first lengthwise direction are alternatively arranged, and
the plurality of openings of the insulating member are elongated in the first lengthwise direction and expose the plurality of portions of first electrode and the plurality of elongated portions of the second electrode extended in the first lengthwise direction.
2. The solar cell module of claim 1 , wherein the lower protective layer is positioned between the insulating member and the plurality of solar cells.
3. The solar cell module of claim 1 , wherein the lower protective layer comprises a plurality of second openings at positions the same as positions of the plurality of openings of the insulating member.
4. The solar cell module of claim 3 , wherein a width of the plurality of openings of the insulating member is different from a width of each second opening of the lower protective layer.
5. The solar cell module of claim 1 , wherein the upper protective layer and the lower protective layer are made of ethylene vinyl acetate (EVA).
6. The solar cell module of claim 1 , wherein the conductive pattern part comprises a plurality of holes.
7. The solar cell module of claim 1 , wherein the first pattern and the second pattern of the conductive pattern part are formed separated on the back sheet.
8. The solar cell module of claim 1 , wherein the conductive adhesive comprises a resin and conductive particles distributed in the resin.
9. The solar cell module of claim 1 , wherein a number of the first electrode is less than a number of the second electrode.
10. The solar cell module of claim 1 , wherein the conductive pattern part is formed on an insulating film positioned on the back sheet.
11. The solar cell module of claim 10 , wherein the lower protective layer is positioned between the back sheet and the insulating film.
12. The solar cell module claim 1 , wherein an edge of each of the plurality of protrusions has a curved shape.
13. The solar cell module claim 1 , wherein a width of the first pattern is different from a width of the second pattern.
14. The solar cell module claim 1 , wherein an area of the first pattern is different from an area of the second pattern.
15. The solar cell module claim 1 , wherein each of the first pattern and the second pattern has a thickness of 25 μm to 50 μm.