Dense grid solder strip pressing device, dense grid battery string welder and string welding method thereof

Abstract

The invention discloses a dense grid solder strip pressing device. The dense grid solder strip pressing device comprises a frame, a pressing strip, spring pressing mechanisms and a solder strip clamping groove; the frame is internally provided with the pressing strip, and the spring pressing mechanisms are arranged at both ends of the frame; and the solder strip clamping groove is formed in the pressing strip. The invention further provides a dense grid battery string welder including the dense grid solder strip pressing device and a string welding method thereof. The dense grid solder strip pressing device is provided with the solder strip clamping groove which is used for clamping a solder strip so as to press the solder strip to a welding spot of a battery piece, the coincide of the solder strip and the welding spot of the battery piece is effectively kept, so that the solder strip is prevented from moving misalignedly, and the phenomenon of poor soldering is avoided.

Description

technical field [0001] The invention relates to the technical field of solar cell stringer welding machines, in particular to a dense grid ribbon pressing device, a dense grid battery stringer and a stringer welding method. Background technique [0002] When the existing non-busbar multi-grid solar cells (hereinafter referred to as "dense grid solar cells") are welded in strings, it is necessary to press the photovoltaic ribbon tightly against the solar cells to heat and weld them. [0003] However, the existing "mesh frame steel wire" mechanism on the market uses a mesh frame plus steel wire to hold down the welding ribbon under the light box, which is not applicable to dense grid cells. This is because the round ribbons used in the existing dense-grid battery sheets cannot be pressed by the round steel wires, so the dense-grid ribbons are prone to roll and shift during the movement of the equipment, resulting in welding The ribbon cannot be accurately positioned on the so...

AI Technical Summary

Problems solved by technology

[0003] However, the existing "mesh frame steel wire" mechanism on the market uses a mesh frame plus steel wire to hold down the ribbon under the light box, which is not applicable to dense grid cells.

This is because the round ribbons used in the existing dense-grid battery sheets cannot be pressed by the round steel wires, so the dense-grid ribbons are prone to roll and shift during the movement of the equipment, resulting in welding The ribbon cannot be accurately positioned on the solder joint, which makes the soldering between the ribbon and the battery sheet weak, and the defect rate increases, which affects the production capacity of the entire equipment

Moreover, when the steel wire is at high temperature for a long time, the steel wire will often become longer due to thermal expansion and contraction, which requires frequent adjustments by the operator, which will increase the labor intensity of the operator.

[0004] In addition, the existing "press pin with spring" mechanism on the market has a relatively large number of solder joints due to dense grid cells, so the press pin is relatively increased. However, the press pin spring mechanism is a non-standard machined part, and the processing cost of non-standard parts is relatively high.

With the increase of indenters, the space is limited, it is difficult to install multiple sets of indenters together, and the height is difficult to adjust, which makes machine adjustment difficult and production efficiency low

[0005] Therefore, the existing welding strip pressing device still needs to be improved and developed

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