Large-size imbricate cell structure

Abstract

The invention provides a large-size imbricate cell structure, which includes a front and a back field. The front includes a number of first main grids and second main grids which are arranged in parallel. The first main grids are located on the inner side of the front, and the second main grids are located at the upper and lower edges of the front. The back field includes a number of back electrodes which are arranged in parallel, and the back electrodes and the first main grids are arranged in parallel and staggered. The front is also provided with at least one first channel and second channel. The first channel is perpendicular to the first main grids and runs through the first main grids and the second main grids. The second channels are arranged in parallel with the first main grids and are cross-communicated with the first channel. The back field is also provided with at least one third channel and fourth channel, the third channel is arranged opposite to the first channel, and the fourth channels are arranged opposite to the first main grids. The back electrodes are arranged opposite to the second channels. The problems of cell bending and hidden crack are solved, and the problems of collision and fragmentation in the later assembly are solved. The product quality is guaranteed, the yield of imbricate cells is improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of solar battery shingled components, and in particular relates to a large-size shingled battery structure. Background technique [0002] Existing shingled battery components are all assembled from small-sized silicon wafers, and the side length of the small-sized silicon wafers is 156 mm. However, with the development of the photovoltaic market, the requirements for solar cell components are getting higher and higher, and the shingled cell components tend to have high power and high conversion rate. However, the existing small-sized silicon wafers have small effective areas and low cell conversion rates, which cannot meet the technical requirements for assembly of existing solar cells. The effective area of ​​a single large-sized silicon wafer is larger, which can increase the effective power generation area of ​​the solar cell module, which is the current research and development trend. While the existin...

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Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a large-size shingled battery structure, especially suitable for shingled batteries with a silicon wafer size greater than 156 mm, which can not only solve the technical problem of battery bending in current silicon wafer printing, but also solve Eliminate the technical problems of bumps and debris during later assembly, ensure product quality, improve the yield of shingled batteries, and reduce production costs

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