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Method and system for monitoring the quality of photovoltaic cells

A photovoltaic cell and battery technology, applied in the monitoring of photovoltaic systems, photovoltaic power generation, photovoltaic modules, etc., can solve problems such as incomplete results and achieve the effect of quality monitoring

Active Publication Date: 2016-09-21
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the obtained results are not entirely satisfactory since, depending on the analyzed cell, its defects are more or less detectable in the photoluminescence image

Method used

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  • Method and system for monitoring the quality of photovoltaic cells
  • Method and system for monitoring the quality of photovoltaic cells
  • Method and system for monitoring the quality of photovoltaic cells

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Embodiment Construction

[0085] The quality monitoring method of the invention makes it possible to monitor the quality of photovoltaic cells manufactured on the production line L in order, if appropriate, to detect one or more cells with insufficient performance compared to expected performance.

[0086] Quality monitoring is implemented by a system consisting of:

[0087] - an excitation device 1 intended to excite the photovoltaic cell to emit photons by luminescence,

[0088] - a device 2 for acquiring a luminescence image, such as a camera, intended to acquire a digital image representing the photons emitted by the photovoltaic cell in response to excitation, in other words an image of the luminescence response of the cell after excitation,

[0089] - a sensor 3 for measuring luminous intensity, adapted to measure the luminous intensity of the signal of the photons emitted by the photovoltaic cell after excitation,

[0090] - control device4.

[0091] The quality monitoring system comprises har...

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Abstract

A method and a system for monitoring the quality of photovoltaic cells are described, the method including for each cell: an excitation step, during which the cell to be monitored is subjected to excitation at a predetermined level of excitation; a step of acquiring at least one luminescence image of the cell to be monitored after excitation; and a step of processing the acquired image. The invention is characterized in that, for each cell, there is provided a preliminary step for determining an excitation level adjusted to the cell, the respective adjusted excitation levels of the different cells to be monitored being adapted such that the luminescence intensities of the signals emitted by the different cells are equal at a given reference luminescence intensity.

Description

technical field [0001] The present invention relates to methods and systems for monitoring the quality of photovoltaic cells, eg by photoluminescence or electroluminescence. Background technique [0002] A photoluminescence image of a photovoltaic cell taken after it has been excited by a beam of light makes it possible to locate defects that could impair the performance of the cell. These defects appear in the image as areas that are darker than the image background. Different approaches propose to use photoluminescence images to determine parameters of cells, in particular to identify and / or quantify defects present in cells. [0003] By Augarten Y., Trupke T., Lenio M., Bauer J., Weber J.W., Juhl M. Kasemann M., Breitenstein O. (Prog. Photovolt.: Res. Appli., 21:933-941. Doi: 10.1002 / The document "Calculation of quantitative shunt values ​​using photoluminescence imaging" by pip.2180(2013)) proposes a method for the quantification of current loss due to defects present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N21/95
CPCG01N21/6489G01N21/9501H01L22/12Y02E10/50H02S50/10H02S50/15G01N21/95G01N2201/12G06T5/50G06T2207/10004
Inventor O·N·阿吉拉W·法夫尔F·奥赞尼P-J·里贝龙
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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