Simulation test device of transmittance of battery pack euphotic layer and test method thereof

Abstract

The invention discloses a simulation test device of transmittance of a battery pack euphotic layer and a test method thereof. Aiming to the defects of the traditional method for testing the transmittance of transparent glass and EVA (Ethylene-vinyl acetate copolymer), the transmittance of the transparent glass and an EVA composite layer of a battery pack can be more truly tested. The simulation test device of the transmittance of the battery pack euphotic layer comprises a white light source, a monochromatic light splitting system, a collimator, a reflector, a sample stage, a wiring column, a micro signal processing system and a terminal information processing system, wherein the monochromatic light splitting system, the collimator, the reflector, the sample stage and the wiring column are all arranged in a dark chamber, the collimator aligns to an exit slit of the monochromatic light splitting system, the reflector is arranged between the collimator and the sample stage, the wiring column is arranged besides the sample stage and is electrically connected with the micro signal processing system, the monochromatic light splitting system is electrically connected with the terminal information processing system, and the micro signal processing system is electrically connected with the terminal information processing system.

Description

【Technical field】 [0001] The invention relates to a testing technology of a solar battery module, in particular to a technology for testing the transmittance of a light-transmitting layer after the solar battery module is formed. 【Background technique】 [0002] Crystalline silicon solar cell modules are currently the most mainstream solar cell module products in the global market. Its market share is above 70%, and its production capacity is still growing rapidly. The domestic technology for manufacturing crystalline silicon solar modules is relatively mature, and has the advantages of sufficient upstream materials and low labor costs. Therefore, the domestic crystalline silicon solar module manufacturing industry has grown rapidly. Among the solar modules produced globally in 2009, modules produced by Chinese enterprises accounted for about 40% of the total. In 2009, there were four Chinese manufacturers among the world's top ten module manufacturers. [0003] Crystallin...

AI Technical Summary

Problems solved by technology

[0006] First, in the process of testing the transmittance of light-transmitting glass and EVA, the optical medium of the two materials is air, and after the solar cell module is formed, the optical medium of the light-transmitting glass is air on one side and EVA on the other; The optical medium of EVA is glass on one side and crystalline silicon solar cells on the other side. Different optical media have different refractive indices, resulting in different transmission paths of light between different media. The existing test methods do not match the actual application. It will inevitably lead to inaccurate test results.

[0007] Second, there is a light-transmitting microstructure in the light-transmitting material layer of the solar cell. In the production of battery laminates, EVA needs to be heated and melted to make it completely bonded to the surface of the light-transmitting glass, and the contact surface will also produce microstructures. , this microstructure will affect the transmission of light, and the existing test method is to test the transmittance of light-transmitting glass and EVA separately, without considering this factor

[0008] Third, EVA will be dehydrated during the manufacturing process of solar cell components, changing its molecular composition and structure, thereby changing its optical properties. Traditional methods can only test the transmittance of EVA that has not been processed by this process, and cannot Obtain accurate results on the effect of the material on the optical performance of battery components

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