Solar cell module and photovoltaic power generator using this

Abstract

A surface electrode ( 5 ) is installed on the light receiving surface of a solar cell element, the surface electrode ( 5 ) comprises three bus bar electrodes ( 5 a ) for extracting light-produced at the solar cell element to the outside and collecting finger electrodes ( 5 b ) connected to these bus bar electrodes ( 5 a ), and the bus bar electrodes ( 5 a ) are not less than 0.5 mm and not more than 2 mm in width and the finger electrodes ( 5 b ) are not less than 0.05 mm and not more than 0.1 mm in width. A high-efficient solar cell module can be obtained with substantially lowered resistance by increasing the number of bus bar electrode ( 5 a ) and thereby decreasing the lengths of the finger electrodes ( 5 b ).

1 - 20 . (canceled) 
     
     
         21 . A solar cell module comprising;
 a plurality of solar cell elements arranged between a translucent panel and a back surface protective member such that the solar cell elements are electrically connected to each other by innerleads, wherein unoccupied spaces between the translucent panel and the back surface protective member are filled with a filler member,   wherein each solar cell element of the plurality of solar cell elements comprises:
 a semiconductor substrate; 
 a plurality of bus bar electrodes disposed parallel to one another in a first direction on a front light-receiving surface of the semiconductor substrate; and 
 a plurality of finger electrodes disposed parallel to one another in a second direction perpendicular to the first direction on the front light-receiving surface of the semiconductor substrate, 
   wherein each of the plurality of finger electrodes is electrically connected to each of the plurality of bus bar electrodes, and each of the plurality of finger electrodes are in direct contact with the filler member without having solder there between.   
     
     
         22 . The solar cell module of  claim 21 , wherein each of the plurality of finger electrodes comprises a predetermined contoured edge. 
     
     
         23 . The solar cell module of  claim 22 , wherein at least a portion of each finger electrode has a width in the range of 0.05 to 0.1 millimeters (mm). 
     
     
         24 . The solar cell module of  claim 22 , wherein the predetermined contoured edge comprises a curve. 
     
     
         25 . The solar cell module of  claim 22 , wherein each of the plurality of bus bar electrodes comprises a predetermined contoured edge. 
     
     
         26 . The solar cell module of  claim 25 , wherein at least a portion of each bus bar electrode has a width is in the range of 1.0 to 2.0 millimeters (mm). 
     
     
         27 . The solar cell module of  claim 25 , wherein the predetermined contoured edge of each bus bar electrode comprises a curve. 
     
     
         28 . The solar cell module  claim 21 , wherein each of the plurality of bus bar electrodes is electrically connected to the innerleads via solder. 
     
     
         29 . The solar cell module according to  claim 28 , wherein the filler member contacts the innerleads and the solder. 
     
     
         30 . A solar cell module comprising;
 a plurality of solar cell elements arranged between a translucent panel and a back surface protective member such that the solar cell elements are electrically connected to each other by innerleads, wherein unoccupied spaces between the translucent panel and the back surface protective member are filled with a filler member,   wherein each solar cell element of the plurality of solar cell elements comprises:
 a semiconductor substrate; 
 a plurality of bus bar electrodes disposed parallel to one another in a first direction on a front light-receiving surface of the semiconductor substrate; and 
 a plurality of finger electrodes disposed parallel to one another in a second direction perpendicular to the first direction on the front light-receiving surface of the semiconductor substrate, 
   wherein each of the plurality of finger electrodes is electrically connected to each of the plurality of bus bar electrodes, and each of the plurality of finger electrodes comprises a predetermined contoured edge.   
     
     
         31 . The solar cell module of  claim 30 , wherein at least a portion of each of the plurality of finger electrodes has a width in the range of 0.05 to 0.1 millimeters (mm). 
     
     
         32 . The solar cell module of  claim 30 , wherein the predetermined contoured edge comprises a curve. 
     
     
         33 . The solar cell module of  claim 30 , wherein each of the plurality of bus bar electrodes comprises a predetermined contoured edge. 
     
     
         34 . The solar cell module of  claim 33 , wherein at least a portion of each bus bar electrode has a width in the range of 1.0 to 2.0 millimeters (mm). 
     
     
         35 . The solar cell module of  claim 33 , wherein the predetermined contoured edge of each bus bar electrode comprises a curve. 
     
     
         36 . The solar cell module of  claim 30 , wherein:
 each of the plurality of finger electrodes is in direct contact with the filler member without having solder there between; and   each of the plurality of bus bar electrodes is electrically connected to the innerleads via solder.   
     
     
         37 . A solar cell module comprising;
 a plurality of solar cell elements arranged between a translucent panel and a back surface protective member such that the solar cell elements are electrically connected to each other by innerleads, wherein unoccupied spaces between the translucent panel and the back surface protective member are filled with a filler member,   wherein each solar cell element of the plurality of solar cell elements comprises:
 a semiconductor substrate; 
 a plurality of bus bar electrodes disposed parallel to one another in a first direction on a front light-receiving surface of the semiconductor substrate; and 
 a plurality of finger electrodes disposed parallel to one another in a second direction perpendicular to the first direction on the front light-receiving surface of the semiconductor substrate, 
   wherein each of the plurality of finger electrodes is electrically connected to each of the plurality of bus bar electrodes, each of the plurality of finger electrodes and each of the plurality of bus bar electrodes comprises a predetermined contoured edge, and each of the plurality of finger electrodes is in direct contact with the filler member without having solder there between.   
     
     
         38 . The solar cell module of  claim 37 , wherein at least a portion of each of the plurality of finger electrodes has a width in the range of 0.05 to 0.1 millimeters (mm) and at least a portion of each bus bar electrode has a width in the range of 1.0 to 2.0 mm. 
     
     
         39 . The solar cell module of  claim 37 , wherein the predetermined contoured edge comprises a curve. 
     
     
         40 . The solar cell module of  claim 37 , wherein each of the plurality of bus bar electrodes is electrically connected to the innerleads via solder.