Solar cell module

Abstract

A solar cell module includes: a plurality of solar cells; a front surface encapsulant member which is disposed on a front surface side of the plurality of solar cells and includes a first polyolefin-based material; a back surface encapsulant member which is disposed on a back surface side of the plurality of solar cells and includes a second polyolefin-based material; an intermediate member which is disposed between the front surface encapsulant member and the back surface encapsulant member and includes a polymer material having either one of a higher polarity and a higher water absorbability than the first polyolefin-based material and the second polyolefin-based material; and a front surface protective member and a back surface protective member disposed to place the plurality of solar cells, the front surface encapsulant member, and the back surface encapsulant member between the front surface protective member and the back surface protective member.

1 . A solar cell module comprising:
 a plurality of solar cells;   a front surface encapsulant member which is disposed on a front surface side, as a light receiving surface side, of the plurality of solar cells and includes a first polyolefin-based material;   a back surface encapsulant member which is disposed on a back surface side of the plurality of solar cells and includes a second polyolefin-based material;   an intermediate member which is disposed between the front surface encapsulant member and the back surface encapsulant member, is in contact with the front surface encapsulant member and the back surface encapsulant member, and includes: a first polymer layer including, as a main component thereof, a first polymer material having either one of a higher polarity and a higher water absorbability than the first polyolefin-based material and the second polyolefin-based material; and a second polymer layer including, as a main component thereof, a second polymer material harder than the first polymer material of the first polymer layer, wherein the second polymer layer is disposed on a back side with respect to the first polymer layer and the first polymer layer is disposed on a front side with respect to the second polymer layer in such a manner that a front surface of the first polymer layer is in contact with the front surface encapsulant member;   a front surface protective member disposed to place the front surface encapsulant member between the front surface protective member and the plurality of solar cells; and   a back surface protective member disposed to place the back surface encapsulant member between the back surface protective member and the plurality of solar cells.   
     
     
         2 . The solar cell module according to  claim 1 ,
 wherein the second polymer layer has a surface including ridges and troughs.   
     
     
         3 . The solar cell module according to  claim 2 ,
 wherein the intermediate member further includes:   a metal layer formed on the surface including the ridges and troughs of the second polymer layer.   
     
     
         4 . The solar cell module according to  claim 3 ,
 wherein the second polymer layer and the metal layer include ridges and troughs.   
     
     
         5 . The solar cell module according to  claim 1 ,
 wherein the second polymer layer is formed on the first polymer layer.   
     
     
         6 . The solar cell module according to  claim 3 ,
 wherein the second polymer layer has a front surface including the ridges and troughs and the metal layer is formed on the front surface of the second polymer layer.   
     
     
         7 . The solar cell module according to  claim 3 ,
 wherein the first polymer layer is formed to cover the metal layer and the second polymer layer.   
     
     
         8 . The solar cell module according to  claim 1 ,
 wherein the first polymer material which is the main component of the first polymer layer is ethylene-vinyl acetate, and   the second polymer material which is the main component of the second polymer layer is polyethylene terephthalate.   
     
     
         9 . The solar module according to  claim 1 , wherein
 the intermediate member further includes a metal layer formed on a front surface of the second polymer layer and on a back surface of the first polymer layer such that the metal layer is provided between the first and second polymer layers.   
     
     
         10 . The solar cell module according to  claim 3 , wherein
 the metal layer is not electrically connected with the solar cells.