Method for packaging solar module

Abstract

The invention discloses a method for packaging a solar module, comprising the serial connection of cell slices. A method for the serial connection of the cell slices is as follows: a traditional thin welding tape is welded and connected with a front electrode of one cell slice, then the welding tape is led from the front face to the back face of the other cell slice, and finally the welding tape and a back electrode of the cell slice are spliced together by a conducting adhesive tape. The method for packaging a solar module adopts the conducting adhesive tape to replace the traditional welding tape for the connection between every two cell slices, using no welding processes or less welding processes, thereby greatly lowering the fragmentation rate caused by bow action , greatly reducing the possibilities of subfissure and back electrode damage, improving the module conversion efficiency, saving the raw materials and lower the module packaging cost.

Description

technical field [0001] The invention relates to solar cells, in particular to a packaging method for solar cell components. Background technique [0002] A single crystalline silicon solar cell has a small power generation capacity and is very fragile, making it inconvenient for practical use. In practical applications, the solar cells should be packaged into components, so improving the technological level of solar cell component packaging and finding and using new raw materials can reduce costs on the basis of ensuring or even improving product quality. At present, solar cell components are mainly packaged in series with cells, and cells are the most critical and cost-effective raw materials in the components. The traditional battery connection method is to weld copper conductive strips between the positive and negative electrodes, and the welding itself will locally heat the battery, which will cause the bow of the battery, thus causing debris and cracks during the lamin...

AI Technical Summary

Problems solved by technology

But the facts show that the bow-shaped bending of the battery sheet is still unavoidable

As long as the battery sheet is heated, the battery sheet will be bent due to the different thermal expansion coefficients of the aluminum paste coating and the silicon layer, that is to say, as long as the welding method is still used, it is impossible to avoid the bow-shaped bending of the battery sheet

Moreover, the impact of welding on components is far more than that. Local heating will damage the uniformity of the back electrode near the cell grid line, and will also cause uneven distribution of local internal stress and cause hidden cracks, which will greatly reduce the working life. It will directly affect the overall electrical performance of the battery assembly, and due to the limitation of the width of the busbar, the width of the welding rod used for the connection is less than 2mm. Welding requires a very complicated commissioning and maintenance process