Solar battery module and method for manufacturing the same

Abstract

Provided is a solar battery module wherein solar battery cells are electrically connected to each other by using a wiring board having a predetermined wiring pattern formed on a resin base material. A method for manufacturing such solar battery module is also provided. In the wiring board of the solar battery module, a direction wherein a design margin is small is permitted to be a direction wherein the thermal contraction ratio of the resin base material is small, by the shape of an electrode pattern on the solar battery cell and that of the wiring pattern on the wiring board. At the time of manufacturing such solar battery module, temperature in a heat treatment step is set at 100° C. or higher but not higher than 180° C. Electrode designing at a fine pitch is made possible and the solar battery module exhibits high solar battery characteristics, even when the solar battery cells are connected by using wiring boards composed of various types of resin materials having thermal compression ratio not sufficiently low.

1 . A wiring board which is used to electrically connect a back electrode-type solar battery cell and in which a wiring pattern is disposed on a resin base, wherein
 the wiring pattern is disposed in a first direction and in a second direction which is perpendicular to the first direction,   either one of the first direction and the second direction, which has a smaller pitch in the wiring pattern than another, is a TD direction of the wiring board, and   the resin base is a film that includes: an MD direction; and the TD direction which is perpendicular to the MD direction and has a thermal shrinkage smaller than a thermal shrinkage in the MD direction.   
     
     
         2 . The wiring board according to  claim 1 , wherein the resin base is a biaxially stretched resin film. 
     
     
         3 . The wiring board according to  claim 1 , wherein the film is a polyester-relative film. 
     
     
         4 . The wiring board according to  claim 3 , wherein the film contains either of a polyethylene terephtalate and a polyethylene naphtalate. 
     
     
         5 . A solar battery module comprising:
 the wiring board according to  claim 1 ; and   a back electrode-type solar battery cell.