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High-transmission-rate low-shading-area solar cell

A technology of solar cells and shading area, which is applied to photovoltaic power generation, circuits, electrical components, etc., can solve the problems of increasing the amount of paste used, increasing the manufacturing cost, etc., to increase the transmission of electrons, fast transmission, and reduce the shading area. Effect

Active Publication Date: 2013-01-02
TRINA SOLAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is possible to reduce the series resistance by making the grid line very high and narrow cross-sectional area, this increases the amount of paste used and increases the manufacturing cost

Method used

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  • High-transmission-rate low-shading-area solar cell
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  • High-transmission-rate low-shading-area solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Compared with the scheme 1 of the prior art, the thin layer loss of the solar battery sheet shown in the first embodiment is increased by 14.4%, and the total shading area is reduced by 19.49%.

[0023] Such as figure 2 As shown, embodiment 2: the line width of the regular hexagonal grid line is 75um, the side length is 3.5mm, the center distance is 6mm, the number of busbar lines set on the positive electrode is three, the busbar line width is 1.8mm, the edge The busbar is 25.5mm away from the edge of the solar cell. Solution 2 of the prior art: there are 3 busbars, the length of the thin grids is 153mm, the width is 75um, the width of the busbars is 1.8mm, and both the busbars and the thin grids are linear.

[0024] Table 3 is a list of thin layer losses of the grid wires of the solar battery sheet shown in Example 2 and the solution 2 of the prior art.

[0025] table 3:

[0026]

[0027] Table 4 is a list of grid line shading areas of the solar battery sheet s...

Embodiment 2

[0030] Compared with the second scheme of the prior art, the thin layer loss of the solar battery sheet shown in the second embodiment is reduced by 11.5%, and the shading area of ​​the busbar is reduced by 16.67%.

[0031] As the side length of the regular hexagon increases, its loss to the sheet resistance will decrease, but the shading area will also increase.

[0032] Compared with the solar cells in the prior art, the solar cells shown in the second embodiment of the present invention not only increase the transmission of electrons, but also reduce the thin layer loss and shading area, and finally improve the photoelectric conversion efficiency of silicon solar cells .

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Abstract

The invention relates to a high-transmission-rate low-shading-area solar cell. A positive electrode of the solar cell comprises a fine grid line and a main grid line, wherein the fine grid line comprises regular hexagonal grid lines and incomplete hexagonal grid lines, and all the regular hexagonal grid lines and incomplete hexagonal grid lines are connected with each other. Scheme 1: the line width of each regular hexagonal grid line is 75um, the length of side is 2.76mm, the center distance is 4.78mm, and the quantity of the main grid lines arranged on the positive electrode is two. Scheme 2: the line width of each regular hexagonal grid line is 75um, the length of side is 3.5mm, the center distance is 6mm, and the quantity of the main grid lines arranged on the positive electrode is three. The invention enhances the electronic transmission, reduces the shading area of the grid lines, and ultimately improves the photoelectric transformation efficiency of the silicon solar cell.

Description

technical field [0001] The invention relates to a solar battery sheet with high transmission rate and low shading area. Background technique [0002] At present, the industrialization technology of crystalline silicon solar cells is very mature. However, compared with conventional energy sources, relatively high cost and low efficiency restrict its development. A lot of research has been done on how to reduce costs and improve conversion efficiency. . [0003] Among the factors affecting efficiency, the gate line is one of the key factors. The design of the grid lines on the surface of silicon solar energy is to collect the photocurrent to the maximum and reduce the series resistance as much as possible, which means that the grid lines should be as dense and thick as possible, but this will inevitably reduce the light-receiving area of ​​the silicon cell. Therefore, the design of the gate line should be a compromise between the light-receiving area, the collection of photo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/042H01L31/0224
CPCY02E10/50
Inventor 陈苏平
Owner TRINA SOLAR CO LTD