Solar cell module

Abstract

A solar cell module includes a plurality of solar cells each having a long axis and a short axis, and including a first electrode disposed on a front surface of a substrate and a second electrode disposed on a back surface of the substrate. The solar cells are disposed along a first direction. The solar cell module further includes a plurality of wiring members connected to the first electrode of a first solar cell and the second electrode of a second solar cell, wherein the plurality of wiring members includes a core layer of metal, and a solder layer formed of a solder material. Further, a ratio of a thickness of the solder layer to a thickness of the core layer is approximately 0.05 to 0.08, and a distance between the first solar cell and the second solar cell is approximately 0.5 mm to 1.5 mm.

What is claimed is: 
     
         1 . A solar cell module, comprising:
 a plurality of solar cells each having a rectangular shape including a long axis and a short axis, each of the plurality of solar cells including a first electrode disposed on a front surface of a substrate and a second electrode disposed on a back surface of the substrate, the plurality of solar cells being disposed along one direction; and   a plurality of wiring members connected to the first electrode of a first solar cell and the second electrode of a second solar cell adjacent to the first solar cell among the plurality of solar cells,   wherein the plurality of wiring members include a core layer of metal, and a solder layer which surrounds a surface of the core layer and is formed of a solder material,   wherein a ratio of a thickness of the solder layer to a thickness of the core layer is approximately 0.05 to 0.08, and   wherein a distance between the first solar cell and the second solar cell is approximately 0.5 mm to 1.5 mm.   
     
     
         2 . The solar cell module of  claim 1 , wherein the number of the plurality of wiring members is about 8 to 12. 
     
     
         3 . The solar cell module of  claim 1 , wherein a thickness of the plurality of wiring members is approximately 270 μm to 320 μm. 
     
     
         4 . The solar cell module of  claim 1 , wherein the plurality of wiring members include a first portion attached at the first solar cell, a second portion attached at the second solar cell, and a third portion connecting the first portion and the second portion between the first solar cell and the second solar cell, and
 wherein the thickness of the solder layer of the third portion is less than the thickness of the solder layer of the first portion and the second portion attached at the first solar cell and the second solar cell, respectively.   
     
     
         5 . The solar cell module of  claim 1 , wherein the solder layer includes a first part attached at the first electrode or the second electrode and a second part opposite to the first part, and
 wherein a thickness of the first part is greater than a thickness of the second part.   
     
     
         6 . The solar cell module of  claim 1 , wherein the plurality of wiring members each has a wire-shape or has a rounded-shape. 
     
     
         7 . The solar cell module of  claim 1 , wherein each of the plurality of solar cells is a fragment divided from a mother solar cell. 
     
     
         8 . The solar cell module of  claim 7 , wherein the mother solar cell is divided into two fragments. 
     
     
         9 . The solar cell module of  claim 8 , wherein each of the two fragments includes a cut surface and a non-cut surface, and
 wherein the plurality of wiring members extend across the non-cut surface of one of the two fragments and across the cut surface of the other of the two fragments when extending between the two fragments.   
     
     
         10 . The solar cell module of  claim 1 , wherein the each of the plurality of solar cells includes a cut surface and a non-cut surface in the one direction, and
 wherein neighboring two solar cells among the plurality of solar cells are disposed with the cut surface of one of the neighboring two solar cells and the non-cut surface of the other of the neighboring two solar cells facing each other in the one direction.   
     
     
         11 . The solar cell module of  claim 1 , wherein the first electrode includes:
 a bus bar including a plurality of pads and disposed along the short axis; and   a plurality of finger lines disposed along the long axis.   
     
     
         12 . The solar cell module of  claim 1 , wherein the thickness of the core layer is approximately 240 to 280 μm. 
     
     
         13 . The solar cell module of  claim 12 , wherein the thickness of the core layer is approximately 255 to 265 μm. 
     
     
         14 . The solar cell module of  claim 12 , wherein the thickness of the solder layer is approximately 15 μm to 20 μm. 
     
     
         15 . The solar cell module of  claim 1 , wherein a cross section of at least one of the plurality of wiring members has a polyhedral shape having at least a curved surface or at least three vertices. 
     
     
         16 . The solar cell module of  claim 1 , wherein the distance between the first solar cell and the second solar cell is approximately 1 mm. 
     
     
         17 . The solar cell module of  claim 1 , wherein the plurality of wiring members extend along the short axis of each cell. 
     
     
         18 . The solar cell module of  claim 1 , wherein the core layer includes at least one of Ni, Cu, Ag and Al. 
     
     
         19 . A solar cell module, comprising:
 a plurality of solar cells each having a rectangular shape including a long axis and a short axis, the plurality of solar cells being disposed along one direction; and   a plurality of wiring members connected to a front surface of a first solar cell and a back surface of the second solar cell adjacent to the first solar cell among the plurality of solar cells,   wherein the plurality of wiring members include a core layer, and a solder layer which surrounds a surface of the core layer,   wherein a ratio of a thickness of the solder layer to a thickness of the core layer is approximately 0.05 to 0.08, and   wherein a distance between the first solar cell and the second solar cell is approximately 0.5 mm to 1.5 mm.   
     
     
         20 . The solar cell module of  claim 19 , wherein the thickness of the core layer is approximately 240 to 280 μm, and
 wherein the thickness of the solder layer is approximately 15 μm to 20 μm.