Test method for stability of POE packaging adhesive film for solar cells

Abstract

The invention relates to a test method for the stability of a POE packaging adhesive film for solar cells, which comprises the following steps: (1) laminating two POE packaging films to obtain a testsample, and recording the length L1 of the test sample; (2) flattening the test sample along the length direction and placing the test sample in a closed environment meeting certain conditions for pre-treatment; (3) taking out the test sample, stretching the test sample at a certain tension load along the length direction at 105 DEG C, restoring the deformation, and recording the length L2 after deformation restoration; and (4) determining that the test sample is qualified when |L2-L1| / L1 is smaller than or equal to a predetermined deformation rate, and determining that the test sample is unqualified when |L2-L1| / L1 is greater than the predetermined deformation rate. The relationship between the creep characteristic of POE and the outdoor stability of solar cells is discovered in the invention. The stability risk of solar cells due to the POE packaging film is evaluated by testing the creep characteristic of the POE packaging film under specific conditions. The test method is simple and reliable.

Description

technical field

[0001] The invention belongs to the field of solar cell testing, and in particular relates to a method for testing the stability of a solar cell POE packaging adhesive film. Background technique

[0002] In order to solve the energy crisis, solar energy will become the main way of energy production in the world in the future. Solar energy is an important energy source for our survival. It is inexhaustible, inexhaustible, pollution-free, cheap, and is an energy source that human beings can use freely and equally. With the continuous improvement of solar cell module technology, the protection of the environment and the huge demand for renewable and clean energy, solar cells have become a more practical way for humans to use solar energy, and humans have been using solar energy on a large scale. Solar cell modules are made by connecting single solar cells with small current and voltage in series and then repackaging them with encapsulating film. The solar cell ...

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