Low-silver-consumption solar cell and manufacturing method thereof

The invention relates to a low-silver-consumption solar cell. The solar cell comprises a solar cell with back surface grid lines to be formed, back surface silver paste main grid lines on the back surface of the solar cell, back surface copper fine grid lines correspondingly and electrically connected with the back surface silver paste main grid lines, and a protective conductive layer which coats the surfaces of the back surface copper fine grid lines and is mainly made of tin or copper-tin alloy or silver. The invention aims to provide the low-silver-consumption solar cell and the manufacturing method thereof, which are suitable for a double-sided power generation solar cell structure, and can greatly reduce the silver consumption of a single cell, so that the manufacturing cost is reduced under the condition that the conversion efficiency of the solar cell is not reduced. 本发明涉及一种低耗银太阳能电池片，它包括待形成背面栅线的太阳能电池片、在太阳能电池片背面的背面银浆主栅线、与背面银浆主栅对应电连接的背面铜细栅线以及包覆背面铜细栅线表面且主要由锡或铜锡合金或银制成的保护导电层。本发明的目的在于提供一种低耗银太阳能电池片及其制造方法，其适用