Preparation Process Of Solar Cell Grid Lines And Its Module Power Generation Efficiency

With the progress of science and technology and social development,the human demand for energy is also increasing.Traditional energy sources such as coal,oil and other non-renewable energy sources are decreasing,the difficulty of extraction increases,and the processing and use of many of the waste generated in the process of serious impact on the ecological environment,while also destroying the ecological environment.Solar energy as a renewable clean energy,huge resources,become an important part of each country’s strategic adjustment of energy structure.Solar energy conversion efficiency is an important indicator of solar energy utilization,solar cell module construction and environmental conditions are key factors in solar power generation.In this thesis,we study the preparation process of solar cell grid line and the optimization of solar cell module power generation efficiency,compared with the IEC 61215,IEC 61853 standard,using the optimized process of grid line battery,optimized solar cell module construction,research on solar cell module construction,environmental factors and other factors on the power generation efficiency of solar cell module,in order to improve the power generation efficiency of solar cell module.Provide reference for improving the power generation efficiency of solar cell modules.1.Study of solar cell grid line preparation process and solar cell module power generation efficiency,grid line silver paste in the silver particle size and ratio,the choice of organic solvents and ratios and sintering temperature will affect the electrode contact state with the wafer,affecting the solar cell power generation efficiency.The number of main grid lines of solar cells,the diameter of grid wire,the width and number of front and back sub-grid lines of solar cells can improve the power generation efficiency of solar cells.The optimization of the main grid lines can increase 0.07%,the optimization of the diameter of grid wire can increase 2.97%,and the optimization of the width and number of front and back sub-grid lines can increase 0.83%and 1.44%respectively.2.Based on the standard photovoltaic testing laboratory,a series of single-factor experiments were conducted to investigate the power generation efficiency of photovoltaic modules affected by changes in environmental factors by examining the changes in a single condition factor and excluding the influence of other environmental factors,so that the power generation efficiency of photovoltaic modules can be quantitatively analyzed under the change of a single factor.The study shows that the power generation efficiency of PV modules is linearly and negatively correlated with temperature,and linearly and positively correlated with irradiance,with linear equations of y=-2.1294x+605.23,y=0.5486x-2.5505,and positively correlated with wind speed,with linear equations of y=28.2x+493.4;and wind speed is positively correlated with y=28.2x+493.4;The angle of incident light has a large impact on the power generation efficiency of PV modules,which is in the shape of a flat-top parabola,and has little impact when the deflection angle is less than 50°,and the deflection angle is between 50°and 90°,and the degree of impact is sharply enhanced with the increase of the angle until the incident light is parallel to the PV modules,and the power generation efficiency of PV modules is zero.3.It was found that the working temperature of double-glass PV module was 1.3℃lower than that of single-glass module,which was basically consistent with the theoretical calculation of the difference value of 0.5℃to 1℃,and the power generation efficiency was better than that of single-glass module up to 4.6 k W·h·（m²）^-1,indicating that the structure of double-glass PV module was better than that of single-glass;the average temperature difference between single-glass PV module The average temperature difference between single-glass PV modules is 0.38℃,while that between double-glass modules is0.39℃,and the average temperature difference between single-glass and double-glass modules is 1.3℃,and the difference in power generation between single-glass and double-glass modules is 0.1 k W·h and 0.43 k W·h respectively.The power generation is valley-peak-valley type between 15°and 45°,and the highest power generation is at 25°,while the lowest power generation is at 45°,and the attenuation ratio is 4.6%compared with the highest power generation;the optimal power generation is 2.447 k W·h when the PV module is installed at the azimuth of south,and there is an optimal azimuth at any point of time,which makes the best power generation efficiency of PV modules.4.Based on the results of the photovoltaic testing standards in IEC 61215 and IEC61853,the PVsyst software was used to conduct simulation experiments on the power generation of PV modules in Shanghai region,based on the results of the standard laboratory studies and the photovoltaic attenuation testing methods.The optimal installation inclination of PV modules in Shanghai is 24°,and the average annual power generation per unit installed capacity is 1098 k W·h·yr^-1;the power generation of PV modules with horizontal installation is 11.9%higher than that of vertical installation;the power generation efficiency of PV modules with tracking system is 12.4%higher than that of fixed installation;the annual power generation per unit of semi-open and closed installation is2.3%and 2.3%lower than that of open installation.The attenuation is 2.3%and 4.7%respectively,which proves that the air circulation is beneficial to improve the efficiency of PV modules;the power generation of PV system in summer is 44.7%higher than that in winter.