Photovoltaic module

Abstract

The embodiments of the present disclosure provide a photovoltaic module including a base plate, a cell string and a cover plate stacked in order; a first packaging layer located between the base plate and the cover plate and surrounding the cell string, the first packaging layer, the base plate and the cover plate defining a sealed space; and a moisture treatment layer located in the sealed space. The moisture treatment layer includes at least one of a functional layer and a moisture detection layer. The functional layer is adaptive to absorb moisture and be converted into a solidified layer, the solidified layer has a degree of cross linking greater than a degree of cross linking of the functional layer. The moisture detection layer is adaptive to detect and determine whether there is moisture in the sealed space through response information of the moisture detection layer.

What is claimed is: 
     
         1 . A photovoltaic module comprising:
 a base plate;   a cell string disposed on the base plate, the cell string having a first surface facing away from the base plate, a second surface opposite to the first surface and facing the base plate, and a side surface between the first and second surfaces;   a cover plate over the first surface of the cell string;   a first packaging layer, located between the base plate and the cover plate and surrounding and facing the side surface of the cell string, wherein the first packaging layer, the base plate and the cover plate define a first sealed space housing the cell string;   a moisture detection layer, located in the first sealed space, wherein the moisture detection layer is adaptive to provide response information indicating whether there is moisture in the first sealed space.   
     
     
         2 . The photovoltaic module of  claim 1 , wherein the moisture detection layer comprises a moisture absorption color changeable layer, a moisture-sensitive resistor or a moisture-sensitive sensor. 
     
     
         3 . The photovoltaic module of  claim 1 , wherein the moisture detection layer is further adaptive to determine a position in the first sealed space where there is moisture. 
     
     
         4 . The photovoltaic module of  claim 1 , wherein the response information comprises color information or photoelectrical information. 
     
     
         5 . The photovoltaic module of  claim 1 , wherein the moisture detection layer is at least located between the first packaging layer and the cell string. 
     
     
         6 . The photovoltaic module of  claim 1 , wherein there are corner junction regions between the first packaging layer and the base plate, and between the first packaging layer and the cover plate, and the moisture detection layer is located at least in the corner junction regions. 
     
     
         7 . The photovoltaic module of  claim 1 , wherein the base plate is a bearing board, and the moisture detection layer is located between the cell string and the base plate. 
     
     
         8 . The photovoltaic module of  claim 1 , wherein the cell string comprises a conductive glass and a perovskite film layer, and the conductive glass functions as an anode of the cell string. 
     
     
         9 . The photovoltaic module of  claim 6 , further comprises a second packaging layer located between the cell string and the base plate. 
     
     
         10 . The photovoltaic module of  claim 6 , further comprises a second packaging layer filling the first sealed space. 
     
     
         11 . The photovoltaic module of  claim 1 , wherein materials for the moisture absorption color changeable layer comprise: copper sulfate, cobalt chloride, methylene amines or organic phenols. 
     
     
         12 . The photovoltaic module of  claim 1 , further comprises a functional layer located at least between the first packaging layer and the cell string, and the functional layer is adaptive to absorb moisture and be converted into a solidified layer, wherein the solidified layer having a degree of crosslinking greater than a degree of cross linking of the functional layer. 
     
     
         13 . The photovoltaic module of  claim 12 , wherein materials for the functional layer comprises a hydrolyzable and crosslinkable material, and the hydrolyzable and crosslinkable material comprises silane modified polyurethane or silicone. 
     
     
         14 . The photovoltaic module of  claim 1 , wherein the cell string comprises cell film layers of gallium arsenide, copper indium selenium or cadmium telluride layers. 
     
     
         15 . The photovoltaic module of  claim 1 , wherein the first surface comprises a central region and a peripheral region surrounding the central region, and the moisture detection layer is located on the side surface and on the peripheral region of the first surface. 
     
     
         16 . The photovoltaic module of  claim 15 , wherein the moisture detection layer is further located on the central region of the first surface. 
     
     
         17 . The photovoltaic module of  claim 1 , wherein the moisture detection layer is located between the cell string and the cover plate. 
     
     
         18 . The photovoltaic module of  claim 1 , further comprising a solidified layer, located within the first sealed space, and materials for the solidified layer comprising a material converted from a hydrolyzable and crosslinkable material after absorbing moisture. 
     
     
         19 . The photovoltaic module of  claim 18 , wherein the solidified layer is at least located between the first packaging layer and the cell string.