A welding ribbon structure applied to lamination components

Abstract

The invention discloses a ribbon structure applied to a stack assembly, which comprises a flat part of the ribbon and an upper cell connection part and a lower cell connection part located on both sides of the flat part of the solder ribbon; front and back sides of the lower / upper cell A number of fine grid lines are arranged in parallel; the cutting direction of the lower cell and the upper cell is parallel to the thin grid; the welding strip structure is arranged perpendicular to the fine grid or parallel to the main grid; the upper cell part is stacked with the lower cell , the stacking area is welded to the thin grid lines / busbars on the front of the lower battery sheet and the thin grid lines / busbars on the back of the upper battery sheet through the flat part of the ribbon, and the thin grid lines / busbars on the back of the upper battery sheet. Grid / busbar welding, the connecting part of the lower cell is welded to the thin grid / busbar on the front of the lower cell. The invention reduces the stress of welding points at the laminations under the load and temperature stress of the MBB lamination assembly or the Smartwire lamination assembly, so that MBB and Smartwire technologies can be applied to the lamination assembly.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic modules, and in particular relates to a welding ribbon structure applied to laminated wafer modules. Background technique [0002] Laminated components generally cut 156.75mm*156.75mm battery slices into small pieces along the direction parallel to the main grid, and arrange the battery slices in series and parallel through conductive glue, such as figure 1 shown. The laminated module can make full use of the internal area of ​​the module. Under the same area, the laminated module can place more than 13% more cells than ordinary modules. Laminated modules need to consider two aspects. One is to use conductive glue to connect the battery sheets, which is difficult to automate; the other is that the current between the current sheets is mainly collected through thin grid lines, such as figure 2 As shown, once a broken grid occurs, the series resistance will increase and the power loss will i...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a welding strip structure applied to laminated assemblies to solve one or more of the problems of difficult serial welding of laminated assemblies: Problem 1: Solve the problem of automatic serialization of the current conductive adhesive of laminated assemblies. The high welding requirements cannot meet the production capacity demand of fast serial welding; Problem 2: Solve the problem of many hidden cracks under load and temperature stress when MBB or Smartwire technology is combined with laminated components; Problem 3: Solve the fine grid of laminated components When breaking, the power loss problem

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