Solar cell string and solar cell component for ground power generation and solar cell plate thereof

Abstract

The invention relates to the photovoltaic or semiconductor field, in particular to a solar cell string and a solar cell component for ground power generation and a solar cell plate thereof. The solar cell string for ground power generation is characterized in that the cell plate is 3-40cm long, 1-15cm wide and 0.08-2mm thick, the front face of the cell plate is provided with fine grids, the line width of the fine grids is 10-200 microns, the spacing of the fine grids is 1-10mm, one end of the fine grids of the cell plate is connected with the back surface of a cell plate with an identical structure through bus bars in a welding way, and the direction of the bus bars is identical to the direction of the fine grids of the cell plate. Since the light receiving area of the cell plate is larger than the light receiving area of the existing cell plate, the invention improves the conversion efficiency of the cell plate. Moreover, since short bus bars are connected between the cell plates of the solar cell string provided in the invention, the current movement distance is short and is about one hundredth of the existing structure, thereby reducing the electric quantity loss of the solar cell component as well as the material cost.

Description

technical field [0001] The invention relates to a solar battery string and solar battery module for ground power generation in the photovoltaic or semiconductor field and the solar battery used therein, and also relates to a preparation method of the solar battery chip for ground power generation. Background technique [0002] The process of making solar cells usually includes a series of silicon wafer detection, silicon wafer surface texturization, diffusion PN junction, phosphorus silicon glass removal, etching, anti-reflection coating, grid electrode production, aluminum back field, rapid sintering, etc. process. [0003] A string of solar cells is obtained by connecting multiple solar cells in series or in parallel by using busbars. [0004] A solar cell module refers to a power generation unit obtained by packaging solar cell strings. [0005] There are back electrodes on the back of the battery sheet. There are generally 2 to 3 back electrodes on a square solar cell ...

AI Technical Summary

Problems solved by technology

However, in order to maintain the resistance of the bus strip within a certain range, the bus strip must be thick, but too thick a bus strip will cause the cell to break when the battery film is pasted, so when the width of the bus strip is less than 1mm, the battery will be damaged. Difficult to install chip components

[0006] In addition, in the existing solar cells and their cell strings and modules, part of the light-receiving surface of the cells will be covered by the busbars and busbars on the light-receiving surface, so the light-receiving area of ​​the cells becomes smaller, and the power generation of the components becomes smaller.

At the same time, the electricity generated by it has to go through a long confluence belt, and the resistance of the confluence belt will also cause a certain loss in the power of the battery module.

For these two loss reasons, the inventor proved according to the test results: if the covered busbar and the light-receiving surface of the busbar can generate electricity, its power generation accounts for about 2.6% of the power generated by the single cell; and because the material of the busbar is Copper, based on the resistivity of pure copper, the power loss caused by the resistance of the bus strap is about 3.8% of the loss

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