A method and system for non-destructive testing of photovoltaic cells based on inductive photothermal radiation

Abstract

The invention discloses a photovoltaic cell non-destructive detection method and a photovoltaic cell non-destructive detection system based on induction photothermal radiation. According to the present invention, electromagnetic induction excitation is performed with an excitation coil, and the electricity, the magnetism, the light, the heat and other information of the photovoltaic cell and the assembly are subjected to high-speed and precision measurement in a completely non-contact manner; the attribute, the defect and the health degree of the photovoltaic cell and the assembly are subjected to subtle and quantitative evaluation by fusing machine learning and an artificial neural network algorithm, such that the disadvantages that the subtle defect cannot be detected, the in-service detection cannot be achieved, the detection is slow and the like in the existing contact type detection are solved; the performance, the defect type and the whole health degree of the photovoltaic cell are subjected to quantitative evaluation by comprehensively utilizing the multi-frequency impedance information, the optical radiation information and the thermal radiation information so as to provide the theory, the method and the technical support for the ordered operation of the photovoltaic cell industry chain; and the method can be used for the online diagnosis of the failure of the photovoltaic cell and the assembly installed in the photovoltaic power plant so as to substantially improve the detection efficiency and the safety of the photovoltaic cell and the assembly.

Description

technical field [0001] The invention particularly relates to a photovoltaic cell non-destructive detection method and system based on induced photothermal radiation, which belongs to the technical field of photovoltaic cell detection. Background technique [0002] With the rapid development of the domestic photovoltaic industry and the rapid growth of photovoltaic system installation capacity in recent years, the operational safety and reliability of photovoltaic systems have gradually emerged. Photovoltaic cells and components have become the key equipment for my country's energy transformation, so the quality inspection and performance evaluation of photovoltaic cells and components is particularly important. [0003] The operating environment of photovoltaic cells varies widely, and different environmental factors such as radiation, temperature, humidity, etc. have different impact mechanisms on the working efficiency of photovoltaic cells and modules in service. Moreove...

AI Technical Summary

Problems solved by technology

[0004] Among them, the performance evaluation of photovoltaic modules according to international standards such as IEC61646 and IEC61215 shows that test environments such as hot spots, humid heat aging, and high and low temperature cycles cause high failure rates of modules, while in practical applications of photovoltaics, it often shows bypass Diode failure, grid line interface failure, encapsulation film delamination, bus bar corrosion, backplane crack and other defect failure forms, resulting in a decline in the photoelectric performance of the module far beyond expectations, and even cause a fire

[0005] Photovoltaic cell inspection technologies on the existing market have great limitations, such as slow inspection speed, need for contact inspection with photovoltaic cells and components, and it is difficult to achieve local subtle defect evaluation, etc.

Images