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Solar cell renovation method by utilizing patch renovation method

A solar cell and patch technology, applied in the field of solar energy, can solve the problems of increasing the manufacturing cost of components, occupying space in the battery area, and reducing the performance of components, so as to achieve the effect of reducing processing costs, good effect and improving component performance

Inactive Publication Date: 2009-04-08
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This method has lower cost and less waste, but there are still two problems. One is that after the laser isolation of a single cell, the discarded cell area still takes up space, which will increase the manufacturing cost of the component after it is made into a component; However, if the damaged area of ​​the series-connected battery in the module is laser-isolated, the current of the isolated battery will not match the current of the series-connected battery, which will reduce the performance of the module

Method used

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Examples

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Effect test

Embodiment Construction

[0018] The present invention utilizes patch repair method as the concrete steps of the method for solar cell repair as follows:

[0019] ① Connect the solar cell to be repaired to a DC power supply, and use a thermal imager or other methods to detect the location of leakage or other defect areas under a certain DC bias voltage;

[0020] ② Use laser etching or other methods to dig out the area where the leakage is detected. After this step, a transparent slit is left on the solar cell to be repaired;

[0021] ③Remove the defective area and leave the area where the solar cell patch is to be placed;

[0022] ④ Treat the cutting surface of the slit with chemical methods to remove the new leakage area;

[0023] ⑤Test the current-voltage curve of the remaining part of the solar cell to be repaired under the standard test conditions of the solar cell;

[0024] ⑥According to the current-voltage curve obtained in the previous step, find a cell whose size and photoelectric performance...

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Abstract

The invention discloses a method for utilizing a patch repair method to repair a solar cell. First, a defective region affecting the photoelectric properties of a cell in the solar cell to be repaired is removed integrally, then a solar cell patch with the size and the photoelectric properties matched with the requirements of the cell is added, and finally, the solar cell patch and electrodes of the solar cell to be repaired are electrically interconnected. The method can lower the processing cost of a damaged solar cell, enhance the matching degree of the photoelectric properties of single cells in a solar cell module, improve the photoelectric conversion efficiency and operating power of the single solar cells and the solar cell module, and can reduce the packaging cost of the solar cell module.

Description

technical field [0001] The invention belongs to the technical field of solar energy, and in particular relates to a method for repairing a solar cell. Background technique [0002] During the manufacturing process of solar cells, due to the quality of the original silicon wafer, or due to the factors of the cell manufacturing process, or due to the reasons during the use of the solar cells after they are made into modules (such as hot spots caused by severe shadow effects ), which will cause defects in the local area of ​​the battery. These defects are likely to form a minority carrier recombination center or a leakage area, and in severe cases, the entire battery will become a waste product. When the battery becomes a waste product, the whole battery is generally discarded or surface-treated to restart the production of solar cells. Before the solar cell module is cured, the waste cells in it are generally dug out and replaced by an equal number. Solar cells matched in si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 沈辉张陆成杨灼坚王学孟
Owner SUN YAT SEN UNIV
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