Solar module and method of manufacturing the same

Abstract

A solar module includes an encapsulant and solar cells in the encapsulant. The encapsulant includes a colored encapsulant on one side of the solar cells and a transparent encapsulant on the other side of the solar cells. An interface between the colored encapsulant and the transparent encapsulant is located more on the one side than a main surface of the other side of the solar cells and located more on the other side than a center in a thickness direction of the solar cells.

1 . A method of manufacturing a solar module, comprising:
 obtaining a laminated body by arranging a colored resin sheet on one side of a solar cell and arranging a transparent resin sheet on the other side of the solar cell;   fabricating the solar module including a colored encapsulant located on the one side of the solar cell and formed of the colored resin sheet and a transparent encapsulant located on the other side of the solar cell and formed of the transparent resin sheet, by pressurizing the laminated body while heating the laminated body to such a temperature that a storage elastic modulus of the transparent resin sheet is higher than a storage elastic modulus of the colored resin sheet.   
     
     
         2 . The method of manufacturing a solar module according to  claim 1 , wherein
 the colored resin sheet includes cross-linked resin.   
     
     
         3 . The method of manufacturing a solar module according to  claim 2 , wherein
 the transparent resin sheet includes non-cross-linked resin.   
     
     
         4 . The method of manufacturing a solar module according to  claim 2 , wherein
 the colored resin sheet includes an ethylene vinyl acetate copolymer.   
     
     
         5 . The method of manufacturing a solar module according to  claim 3 , wherein
 the transparent resin sheet includes a polyolefin.   
     
     
         6 . The method of manufacturing a solar module according to  claim 2 , wherein
 the cross linked resin has a gel fraction of 50% or higher.   
     
     
         7 . The method of manufacturing a solar module according to  claim 6 , wherein
 the non cross linked resin has a gel fraction of less than 50%.   
     
     
         8 . The method of manufacturing a solar module according to  claim 1 , wherein
 the temperature is set to a temperature that a storage elastic modulus of the transparent resin sheet is 1.5 times higher than a storage elastic modulus of the colored resin sheet.   
     
     
         9 . The method of manufacturing a solar module according to  claim 1 , wherein
 the temperature is set to a temperature that a storage elastic modulus of the transparent resin sheet is 3 times higher than a storage elastic modulus of the colored resin sheet.   
     
     
         10 . The method of manufacturing a solar module according to  claim 1 , wherein
 the laminated body is pressurized so that the colored encapsulant is located more on the one side than a main surface on the other side of the solar cell and located more on the other side than a center in a thickness direction of the solar cell.   
     
     
         11 . The method of manufacturing a solar module according to  claim 2 , wherein
 the laminated body is pressurized so that the colored encapsulant is located more on the one side than a main surface on the other side of the solar cell and located more on the other side than a center in a thickness direction of the solar cell.   
     
     
         12 . The method of manufacturing a solar module according to  claim 3 , wherein
 the laminated body is pressurized so that the colored encapsulant is located more on the one side than a main surface on the other side of the solar cell and located more on the other side than a center in a thickness direction of the solar cell.   
     
     
         13 . The method of manufacturing a solar module according to  claim 4 , wherein
 the laminated body is pressurized so that the colored encapsulant is located more on the one side than a main surface on the other side of the solar cell and located more on the other side than a center in a thickness direction of the solar cell.   
     
     
         14 . A solar module, comprising:
 an encapsulant; and   a solar cell arranged in the encapsulant, wherein   the encapsulant includes a colored encapsulant located on one side of the solar cell and a transparent encapsulant located on the other side of the solar cell, and   an interface between the colored encapsulant and the transparent encapsulant is located more on the one side than a main surface of the other side of the solar cell and located more on the other side than a center in a thickness direction of the solar cell.   
     
     
         15 . The solar module according to  claim 14 , wherein
 the colored encapsulant contains cross-linked resin.   
     
     
         16 . The solar module according to  claim 15 , wherein
 the transparent encapsulant contains non-cross-linked resin.   
     
     
         17 . The solar module according to  claim 15 , wherein
 the colored encapsulant contains an ethylene vinyl acetate copolymer.   
     
     
         18 . The solar module according to  claim 16 , wherein
 the transparent encapsulant contains a polyolefin.   
     
     
         19 . The solar module according to  claim 15 , wherein
 the cross linked resin has a gel fraction of 50% or higher.   
     
     
         20 . The method of manufacturing a solar module according to  claim 19 , wherein
 the non cross linked resin has a gel fraction of less than 50%.