Method of calculating hot spot temperature of micro-defect solar cell module

A solar cell module, hot spot temperature technology, applied in material defect testing, radiation pyrometry, measuring devices, etc., can solve problems such as cell mismatch, hot spot research, power consumption, etc., to reduce the probability of hot spots , the effect of improving economic benefits and improving reliability

Active Publication Date: 2017-12-15
HOHAI UNIV CHANGZHOU
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Problems solved by technology

Photovoltaic modules use solar energy to generate electricity, so most of them work outdoors. The outdoor conditions are relatively harsh. On the one hand, such as bird droppings and tree leaves, these occlusions will cause partial failure of the components. The most prominent manifestation is the hot spot phenomenon. This effect causes the temperature of the component to rise, and if it is not handled in time, the component will be burned, causing serious consequences
On the other hand, during the use of components outdoors, due to external forces and other factors, some defects, such as cracks, will occur in the components.
The generation of defects will cause the performance mismatch of the cells in the module, which will cause the cells to generate reverse bias voltage when working outdoors, consume power, and cause hot spot effect
[0003] At present, according to the definition of the standard IEC61215, many researchers have studied the mismatch between the parameters of the cells in the module and the shadow occlusion in terms of the photovoltaic hot spot effect, and have not related to the influence of the joint effect of the two on the hot spot Research

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  • Method of calculating hot spot temperature of micro-defect solar cell module
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  • Method of calculating hot spot temperature of micro-defect solar cell module

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0033] The method for calculating the hot spot temperature of the micro-defect solar cell module of the present invention, such as figure 1 As shown, the details are as follows:

[0034] 1) Select one piece of cells with point defects, line defects, and surface defects, and then assemble them in modules respectively. One module contains one type of defect, and the rest of the modules are normal cells. The EL images of point, line, and surface defect cells are as follows: figure 2 , 3 , 4; apply a 12V reverse bias voltage at both ends of the tested cell, use an infrared thermal imager to measure the temperature, observe the temperature field formed on the surface of t...

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Abstract

The invention discloses a method of calculating the hot spot temperature of a micro-defect solar cell module, which includes the following steps: selecting a micro-defect cell, dividing the micro defects into point defects, line defects and surface defects, and assembling the cell in a module; covering the micro-defect cell at different proportions to generate a hot spot effect; and calculating the temperature of the micro-defect cell. By using the method, the hot spot temperature of a photovoltaic module can be calculated and predicted quickly, time can be saved, modules can be maintained and repaired in time, and ultimately, the economic benefits can be increased.

Description

technical field [0001] The invention relates to a method for calculating the temperature of a hot spot of a micro-defect solar cell component, belonging to the technical field of photovoltaic components. Background technique [0002] With the continuous development and innovation of photovoltaic power plants, the development of photovoltaics at home and abroad has received a lot of attention, including photovoltaic companies and scientific researchers. Photovoltaic modules use solar energy to generate electricity, so most of them work outdoors. The outdoor conditions are relatively harsh. On the one hand, such as bird droppings and tree leaves, these occlusions will cause partial failure of the components. The most prominent manifestation is the phenomenon of hot spots. This effect causes the temperature of the component to rise, and if it is not treated in time, the component will be burned, causing serious consequences. On the other hand, during the use of components outd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00G01N25/72
CPCG01J5/0096G01J2005/0077G01N25/72
Inventor 吴军张臻祝曾伟陆悦潘武淳戴磊刘志康刘富光
Owner HOHAI UNIV CHANGZHOU
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