Photovoltaic backboard chloride ion permeability testing method and device

A photovoltaic backplane and testing device technology, which is applied in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problems of internal grid line corrosion, photovoltaic module power generation efficiency attenuation, poor water vapor barrier, etc. problem, to achieve the effect of convenient operation, cheap price and simple installation

Active Publication Date: 2015-12-02
CHINA NAT ELECTRIC APP RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the water vapor transmission rate of the backsheet is high and the barrier to water vapor is poor, the moisture in the atmosphere will enter the photovoltaic module through the backsheet, causing the hydrolysis of the encapsulation film (EVA) and the oxidation of the cells. The grid lines on the surface of the cell and the corrosion of the silver paste will eventually affect the power generation efficiency of the photovoltaic module
[0003] At present, the industry generally pays attention to the water vapor transmission rate of photovoltaic backsheets, and little atten

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  • Photovoltaic backboard chloride ion permeability testing method and device
  • Photovoltaic backboard chloride ion permeability testing method and device
  • Photovoltaic backboard chloride ion permeability testing method and device

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Embodiment Construction

[0051] Such as Figure 1 to Figure 5 The shown photovoltaic backplane chloride ion permeability testing device includes a permeation cell 1, a permeation cell 2, a conductivity electrode 6, two graphite electrodes 7, and a conductivity meter 9. The permeation cell 1 and The permeation tanks 2 all have a top cover, wherein the permeation tank 1 has a permeation tank cover plate 11, and the permeation tank 2 has a permeation tank cover plate 12. The permeation tank 1 and permeation tank 2 There are rehydration ports on the top cover. Sodium chloride solution or deionized water can be added to the pool through the refill port to supplement the solution loss during the test. The permeation cell 1 is filled with high-concentration chlorine with a concentration of 30g / L. Sodium chloride solution, the permeation tank 2 is filled with a low-concentration sodium chloride solution with a concentration of 0.1mg / L, the permeation tank 1 and the permeation tank 2 are both equipped with an ...

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Abstract

The invention discloses a photovoltaic backboard chloride ion permeability testing method and device. The device comprises a permeating tank, a permeance tank, a conductivity electrode, two graphite electrodes and a conductivity meter. The permeating tank contains a high-concentration sodium chloride solution. The permeance tank contains a low-concentration sodium chloride solution. Stirrers are arranged in the permeating tank and the permeance tank. The permeating tank and the permeance tank are connected through a connecting cylinder transversely arranged. A photovoltaic backboard to be tested is vertically inserted into the middle of the connecting cylinder to partition the connecting cylinder into isolated left and right parts. The isolated left and right parts are communicated with the permeating tank and the permeance tank respectively. The conductivity electrode is located in the permeance tank and is close to the photovoltaic backboard. The conductivity meter is connected with the conductivity electrode. The two graphite electrodes are located in the permeating tank and the permeance tank respectively. The two graphite electrodes are connected with a voltage stabilizing power source. The device is simple in structure and capable of fast testing chloride ion permeability of the photovoltaic backboard. The invention discloses the testing method.

Description

technical field [0001] The invention relates to a method and equipment for testing the performance of a photovoltaic backplane, in particular to a method and a device for testing the chloride ion permeability of a photovoltaic backplane. Background technique [0002] As we all know, the design service life of photovoltaic modules is required to be more than 25 years. Therefore, corresponding working life requirements are also put forward for the supporting materials that make up the modules. As the key material in the photovoltaic module after the cells, the backsheet is located on the outermost layer of the module and plays a role of protection and support for the photovoltaic module. Water vapor transmission rate is an important index to measure the performance of photovoltaic backsheet. If the water vapor transmission rate of the backsheet is high and the barrier to water vapor is poor, the moisture in the atmosphere will enter the photovoltaic module through the backshe...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 秦汉军冯皓胡利芬陈心欣祁黎
Owner CHINA NAT ELECTRIC APP RES INST
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