Crystal silicon cell piece welding device and string welding machine with crystal silicon cell piece welding device

Abstract

The invention discloses a crystal silicon cell piece welding device. The crystal silicon cell piece welding device is characterized by comprising a preheating platform, a welding platform, a cooling platform, a moving mechanism and multiple sets of welding heads capable of moving vertically; the moving mechanism is used for transferring crystal silicon cell pieces among the stations of the preheating platform, the welding platform and the cooling platform; and the welding heads are used for welding solder strips. According to the crystal silicon cell piece welding device, by arranging the preheating platform, the welding platform and the cooling platform, segmental preheating before welding and gradient cooling after welding are achieved conveniently, and the situation that the crystal silicon cell pieces are damaged due to thermal expansion and cold shrinkage or the abrupt change of the high temperature is avoided effectively, and the welding yield is increased greatly. The invention further provides a string welding machine with the crystal silicon cell piece welding device.

Description

technical field [0001] The invention relates to solar cell processing equipment, in particular to a crystalline silicon cell welding device and a stringer with the welding device. Background technique [0002] As a clean energy source, solar cells have been more and more widely used in recent years. In the process of making solar cells, it is necessary to weld the fabricated crystalline silicon cells together. At present, the link of welding is mostly realized by stringer. Common welding methods mainly include: induction brazing, infrared welding, high frequency electromagnetic field welding, hot air welding or micro flame brazing, etc. [0003] In recent years, with the continuous advancement of solar cell technology, crystalline silicon cells have become thinner and thinner, and the welding equipment on traditional stringers has become more and more difficult to adapt to new crystalline silicon cells, resulting in a sharp decline in the welding yield . After painstakin...

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the continuous advancement of solar cell technology, crystalline silicon cells have become thinner and thinner, and the welding equipment on traditional stringers has become more and more difficult to adapt to new crystalline silicon cells, resulting in a sharp decline in the welding yield

According to the inventor's painstaking research and analysis, the main reason for this problem is that the impact of thermal expansion and contraction is more significant. The thinner the crystalline silicon cell, the easier it is to be broken by thermal shock during welding overshoot.

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