Cell sheet for shingled assembly, shingled assembly and method for preparing cell sheet

Abstract

The invention relates to a battery sheet for a shingled assembly, a shingled assembly and a method for preparing the battery sheet. The battery sheet has a front side of the battery sheet and a back side of the battery sheet, a plurality of front busbars are arranged on the front side of the battery sheet, and a plurality of back busbars are arranged on the back side of the battery sheet, and the battery sheet includes A plurality of blocks, each block respectively including a front busbar and a back busbar at its edge, the front busbar of at least one block of the battery sheet has an extension at one or both ends , the extension extends along the other edge of the at least one block that intersects the edge. The shingled assembly is made of small battery sheets split from the above battery sheet.

Description

technical field [0001] The invention relates to a battery sheet for a shingled assembly, a shingled assembly and a method for preparing a battery sheet for a shingled assembly. Background technique [0002] With the accelerated consumption of conventional fossil energy such as coal, oil, and natural gas around the world, and the continuous deterioration of the ecological environment, especially the increasingly severe global climate change caused by greenhouse gas emissions, the sustainable development of human society has been seriously threatened. Countries around the world have formulated their own energy development strategies to deal with the limitation of conventional fossil energy resources and the environmental problems brought about by their development and utilization. Solar energy has become one of the most important renewable energy sources due to its reliability, safety, extensiveness, longevity, environmental protection, and resource adequacy, and is expected t...

AI Technical Summary

Problems solved by technology

Due to the uneven confluence of the busbar design of solar cells and the long current collection path, when making shingled modules under the electroluminescence (EL) image, the images at both ends of the edge appear darker than the middle, which affects the final power output of the module

[0004] In particular, due to the fact that the monocrystalline silicon wafers used to make shingled modules have arc chamfers, the corresponding positions of the shingled battery strings do not have sufficient battery-conductive adhesive-battery connections.

The effective width of the small busbar on the edge of the cell is shorter than that in the middle, so when the chamfered small pieces are used to make shingled components, the current collection path of the chamfered part is longer and the resistance is large, causing this area to be darker than the middle in the EL imaging, which affects the quality of the component power output

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