New String Welding Machine

Abstract

The invention discloses a solar cell piece welding device, and particularly relates to a novel series welding machine. Mechanical stress and thermal stress of the novel series welding machine are controllable; a top surface after being welded is effectively overturned and the welding process of a bottom surface is finished; the automation and precision are higher; each of a first welding machine and a second welding machine comprises a transferring mechanism and a laser welding head mechanism; the output end of the transferring mechanism of the first welding machine is connected with the input end of an overturning mechanism of which the output end is connected with the input end of the transferring mechanism of the second welding machine; the laser welding head mechanism of the first welding machine is used for welding one side of a connection belt onto the top surface of a solar cell piece; the overturning mechanism is used for overturning the solar cell piece, placing the overturned solar cell piece at the adjacent position of the former solar cell piece and overlapping the other side of the connection belt onto the top surface of the former solar cell piece; the laser welding head mechanism of the second welding machine is used for welding the connection belt onto the top surface of the former solar cell piece.

Description

technical field [0001] The invention relates to the technical field of solar cell sheet welding devices, in particular to a novel stringer. Background technique [0002] Today, in the production of photovoltaic modules, most of the solar cells are connected with each other by welding methods such as induction brazing, infrared welding, high-frequency electromagnetic field welding, hot air welding or micro-flame brazing; the upper and lower sides of the solar cells are respectively The connecting strip is usually a copper strip, and the copper strip is wrapped with solder; taking infrared welding as an example, one side of the connecting strip is laid on the front of the previous solar cell during processing, and the side of the connecting strip is exposed. On the other side, then place the latter solar cell on the adjacent position of the previous one and press it on the other side of the connection belt, and then pass these end-to-end connected solar cells through the infra...

AI Technical Summary

Problems solved by technology

[0002] Today, in the production of photovoltaic modules, most of the solar cells are connected with each other by welding methods such as induction brazing, infrared welding, high-frequency electromagnetic field welding, hot air welding or micro-flame brazing; the upper and lower sides of the solar cells are respectively The connecting strip is usually a copper strip, and the copper strip is wrapped with solder; taking infrared welding as an example, one side of the connecting strip is laid on the front of the previous solar cell during processing, and the side of the connecting strip is exposed. On the other side, then place the latter solar cell on the adjacent position of the previous one and press it on the other side of the connection belt, and then pass these end-to-end connected solar cells through the infrared welding head in turn, under the high temperature of infrared rays Melt the solder on the connection strip, complete the welding of the connection strip and the solar cells and connect the solar cells in series; however, the above welding process will have to use double-sided welding due to the method of connecting first and then welding. The method, taking infrared welding as an example, the above welding method heats the entire solar cell on both sides, and the connection strip and the solar cell need to be mechanically clamped during the welding process, and the solar cell and the connection strip will expand and contract when heated. , solar cells will break due to thermal expansion and contraction, especially today's solar cells are getting thinner and thinner, the above welding methods will lead to higher and higher damage rates of solar cells

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