Welding strip structure applied to lamination assemblies

Abstract

The invention discloses a welding strip structure applied to lamination assemblies. The welding strip structure comprises a welding strip flat part, an upper battery piece connection part and a lowerbattery piece connection part, wherein the upper battery piece connection part and the lower battery piece connection part are located at two sides of the welding strip flat part; a plurality of finegrid lines are arranged at the front side and / or back side of a lower / upper battery piece; the cutting directions of the lower battery piece and the upper battery piece are parallel to the fine grid lines; the welding strip structure is arranged vertically to the fine grid lines or in parallel to main grid lines; one part of the upper battery piece and the lower battery piece are stacked; the stacked area is welded with the fine grid lines / main grid lines at the front side of the lower battery piece and the fine grid lines / main grid lines at the back side of the upper battery piece through thewelding strip flat part; the upper battery piece connection part is welded with the fine grid lines / main grid lines at the back side of the upper battery piece; and the lower battery piece connectionpart is welded with the fine grid lines / main grid lines at the front side of the lower battery piece. According to the welding strip structure, the stress of a welding point at the laminated part ofan MBB lamination assembly or a Smartwire lamination assembly under load and temperature stress is reduced, so that an MBB technology and a Smartwire technology can be applied to the lamination assemblies.

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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