Humidity-heat aging test method for photovoltaic module

Abstract

The invention discloses a damp-heat aging test method for a photovoltaic module, which comprises the following steps: preparing a sample: providing a bare battery piece, and welding a welding strip on the front surface of the bare battery piece to obtain the sample; the sample testing step comprises the steps that initial testing is carried out on the sample to obtain an initial testing result, and the initial testing comprises power testing, PL testing and EL testing; putting the sample subjected to the initial test into a damp-heat aging oven for testing, and setting the testing conditions of the damp-heat aging oven as follows: the testing temperature is 85 + / -1 DEG C, the relative humidity is 85 + / -1%, and the testing time is 24 hours; and a sample result analysis step: performing post-detection on the sample to obtain a post-test result, the post-detection comprising power test, PL test and EL test, and calculating an attenuation value according to the initial test result and the post-test result. The method is closer to the state of a bare battery piece in an actual photovoltaic module product, the corrosion speed of the sample is increased, the experiment process is accelerated, and a large number of test resources are saved.

Description

technical field [0001] The invention relates to the technical field of photovoltaics, and more particularly, to a method for testing the damp heat aging of photovoltaic modules. Background technique [0002] At present, when photovoltaic manufacturing enterprises update new materials or improve and upgrade products, in order to verify the process reliability of materials or new products, they need to do a series of reliability tests to ensure that the life of photovoltaic modules reaches more than 25 years. Among them, the damp heat test (DH) is an important aging test, and its test conditions are temperature 85°C and humidity 85%. Through the damp heat test, the damp heat aging resistance performance of each component of the photovoltaic module product and the package is systematically evaluated and analyzed, and then Improve it to improve the overall performance of the product. [0003] At present, conventional photovoltaic module products are used for damp heat testing, ...

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Problems solved by technology

[0003] At present, conventional photovoltaic module products are used for damp heat testing, the amount of materials used is large, and the test cost is high; and the test time is long (1000h-2000h), the entire verification cycle is as long as 4-5 months, and the verification efficiency is extremely low. The update of new materials or new processes is extremely unfavorable, often because the damp heat test prolongs the entire introduction period and the removal speed of unsuitable solutions is too slow

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