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

A technology for solar cells and encapsulation films, used in semiconductor/solid-state device testing/measurement, etc., can solve problems such as cell cracks, loose junction boxes, increased risks, etc., and achieve simple test methods, improved reliability, and reliable results. Effect

Active Publication Date: 2019-06-25
CSI SOLAR POWER GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the uncrosslinked POE film, during the long-term outdoor use, the relative displacement between the upper and lower layers of glass is prone to occur, resulting in problems such as hidden cracks in the cell, detachment of solder joints, and loose junction boxes. The installation angle of the components is relatively large, the above-mentioned risks are exacerbated, and potential safety hazards are likely to occur

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for testing the stability of a solar cell POE packaging adhesive film, comprising the steps of:

[0038] (1) Take 100×100mm samples of the 3M 8110 POE film, and after lamination on the laminator, cut them according to 40mm×5.5mm to obtain test samples, and measure the tensile strength of the package film POE through the pre-test. The ultimate load that can be reached at 100°C is 0.01MPa, and the test tensile load value of the selected step (3) is 0.005MPa; the length of the test sample is recorded as L 1 ;

[0039] (2) Use the clamps of the dynamic mechanical thermal analyzer to fix the two ends of the strip-shaped encapsulation film, flatten it and place it in a closed environment, and perform the pollution level test according to the test sequence of the IEC61730-2 photovoltaic module safety certification test standard, specifically as follows:

[0040]①Dry cooling at -40°C for 48 hours;

[0041] ②In an environment with a temperature of 105°C and a humidit...

Embodiment 2

[0048] The difference from Example 1 is that the model of the POE film is Dow Enlight, its ultimate load is tested at 0.02MPa, and its tensile load is set at 0.006MPa. figure 1 Curve 2 is the strain curve of Example 1 sample. After calculation, |L 2 -L 1 | / L 1 41.6%, greater than 1%, it is judged that when the POE film is used outdoors after solar cell packaging, the stability is unqualified. figure 1 Curve 2 is the strain curve of Example 2 sample.

Embodiment 3

[0050] The difference from Example 1 is that the model of the POE film is Cybrid T22, its ultimate load is tested to be 0.014MPa, and its tensile load is set to be 0.0112MPa. figure 1 Curve 2 is the strain curve of Example 1 sample. After calculation, |L 2 -L 1 | / L 1 If it is 0.16%, less than 1%, it is judged that the stability of the POE adhesive film is qualified when it is used outdoors after solar cell packaging. figure 1 The curve 3 is the strain curve of the sample of Example 3.

[0051] The results of the peak strain and the deformation rate after recovery of the three kinds of POE films in Examples 1 to 3 are shown in Table 1:

[0052] Table 1

[0053] sample

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L21/66
Inventor 何帅崔寅鑫彭丽霞
Owner CSI SOLAR POWER GROUP CO LTD
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