Through-hole single-side direct-connection solar cell module and preparation method

Abstract

The invention discloses a through-hole single-side direct-connection solar cell module comprising a first solar cell piece, transverse main grids are arranged on a first front electrode and a first back side electric field, at least one of the transverse front main grid and the transverse back main grid is provided with a contact, the contact is arranged at the end of the transverse main grids, the first front electrode is further provided with a longitudinal auxiliary grid, a through hole is formed in the direction of the longitudinal auxiliary grid where the contact is located, an isolationstrip is arranged on the periphery of the through hole; the long edges of the adjacent solar cell pieces are overlapped to form surface contact; the adjacent solar cell pieces are connected through acommon contact, then a main grid slurry is poured into the through hole, and a battery string is formed through sintering. Correspondingly, the invention further provides a preparation method of the through-hole single-side direct-connection solar cell module. According to the invention, the structure is simple, and the gap between the battery pieces is small, the power loss of the welding strip is reduced, the reliability of the battery module is high, and the photoelectric conversion efficiency is high.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a through-hole single-sided direct connection solar cell module and a preparation method thereof. Background technique [0002] Traditional crystalline silicon module cells are basically connected by metal ribbons. This connection method has three obvious defects: one is that the gap between the metal ribbon and the cell occupies the light-receiving area on the front of the module; the other is that the metal ribbon has line loss; the third is that the solder ribbon is prone to thermal expansion and contraction due to temperature changes Fracture and corrosion, these three methods all have a great impact on the conversion efficiency and performance stability of the module. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a through-hole single-sided direct-connected solar cell module, which has a simple structure, small gaps...

AI Technical Summary

Problems solved by technology

This connection method has three obvious defects: one is that the gap between the metal ribbon and the cell occupies the light-receiving area on the front of the module; the other is that the metal ribbon has line loss; the third is that the solder ribbon is prone to thermal expansion and contraction due to temperature changes Fracture and corrosion, these three methods have a great impact on the conversion efficiency and performance stability of the module

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