Electrodeless grid line back contact solar cell series structure

Abstract

The utility model discloses a kind of electrodeless grid line back contact solar cell series structure, including copper tin line composite film and cell piece, the copper tin line composite film is by organic film base material, copper wire, the tin alloy layer of copper wire surface composition, the cell piece includes the silicon piece matrix of N area and P area prepared on back, and N area and P area surface are plated with conductive contact layer, the copper wire is with surface covered tin alloy layer composition copper tin line, copper tin line is attached to organic film base material surface, the copper tin line composite film is attached in the back of well-arranged cell piece, copper tin line arrangement design and the conductive contact layer of N area and P area surface of cell piece are centrally attached contact, form the battery string of series structure. Copper tin line composite film is used to replace main grid electrode and fine grid electrode, avoids insulating ink, saves production cost and corresponding process, improves production yield.

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