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Three types of photovoltaic modules problem detection methods to quickly collect it

Release time:

2019-04-10

Three types of photovoltaic modules problem detection methods to quickly collect it Photovoltaic modules are the core components of photovoltaic power generation, in order to normal operation of photovoltaic power generation, it is necessary to inspect and maintain the components of photovoltaic power plants. The common problems of photovoltaic modules are: hot spots, cracks and power attenuation. Because these quality problems are hidden inside the battery board or occur after the photovoltaic power station has been in operation for a period of time, it is difficult to identify when the battery board enters the site for acceptance, and professional equipment is needed for photovoltaic module detection. Causes of Hot Spot Formation and Detection Method of Photovoltaic Modules Photovoltaic module hot spot refers to the module in the sun, because some of the cells are blocked can not work, so that the temperature of the covered part is much larger than the uncovered part, resulting in high temperature burning dark spots. The formation of hot spots in photovoltaic modules is mainly composed of two internal factors, namely, the internal resistance and the dark current of the cell itself. The hot spot durability test is a photovoltaic module detection test to determine the ability of the solar cell module to withstand the hot spot heating effect. Through the reasonable time and process to test the photovoltaic cell module, to show that the photovoltaic cell can be used for a long time under the specified conditions. Hot spot detection can be detected by infrared thermal imager, which can use thermal imaging technology to display the temperature and its distribution of the measured target in a visible thermal map. Causes of Crack Formation and Detection Methods of Photovoltaic Modules Crack refers to the small cracks in the battery chip, the battery chip crack will accelerate the battery chip power attenuation, affecting the normal service life of the component, while the battery chip crack will expand under mechanical load, may lead to open circuit damage, crack may also lead to hot spot effect. The occurrence of cracking is due to the joint action of many reasons, the uneven force of the components, or the severe jitter in the process of transportation and transportation may cause the cracking of the battery. Photovoltaic modules will be tested by EL imaging before leaving the factory, and the instrument used is EL detector. The instrument uses the principle of electroluminescence of crystalline silicon, and uses a high-resolution CCD camera to capture the near-infrared image of the component to obtain and determine the defects of the component. The EL detector can detect whether the photovoltaic cell module has hidden cracks, fragments, virtual welding, broken grid and abnormal phenomena of single-chip cells with different conversion efficiency. Three types of photovoltaic modules problem detection methods to quickly collect it

Three types of photovoltaic modules problem detection methods to quickly collect it

Photovoltaic modules are the core components of photovoltaic power generation, in order to normal operation of photovoltaic power generation, it is necessary to inspect and maintain the components of photovoltaic power plants. The common problems of photovoltaic modules are: hot spots, cracks and power attenuation. Because these quality problems are hidden inside the battery board or occur after the photovoltaic power station has been in operation for a period of time, it is difficult to identify when the battery board enters the site for acceptance, and professional equipment is needed for photovoltaic module detection.

Causes of Hot Spot Formation and Detection Method of Photovoltaic Modules

Photovoltaic module hot spot refers to the module in the sun, because some of the cells are blocked can not work, so that the temperature of the covered part is much larger than the uncovered part, resulting in high temperature burning dark spots.

The formation of hot spots in photovoltaic modules is mainly composed of two internal factors, namely, the internal resistance and the dark current of the cell itself.

The hot spot durability test is a photovoltaic module detection test to determine the ability of the solar cell module to withstand the hot spot heating effect. Through the reasonable time and process to test the photovoltaic cell module, to show that the photovoltaic cell can be used for a long time under the specified conditions.

Hot spot detection can be detected by infrared thermal imager, which can use thermal imaging technology to display the temperature and its distribution of the measured target in a visible thermal map.

Causes of Crack Formation and Detection Methods of Photovoltaic Modules

Crack refers to the small cracks in the battery chip, the battery chip crack will accelerate the battery chip power attenuation, affecting the normal service life of the component, while the battery chip crack will expand under mechanical load, may lead to open circuit damage, crack may also lead to hot spot effect. The occurrence of cracking is due to the joint action of many reasons, the uneven force of the components, or the severe jitter in the process of transportation and transportation may cause the cracking of the battery.

Photovoltaic modules will be tested by EL imaging before leaving the factory, and the instrument used is EL detector. The instrument uses the principle of electroluminescence of crystalline silicon, and uses a high-resolution CCD camera to capture the near-infrared image of the component to obtain and determine the defects of the component. The EL detector can detect whether the photovoltaic cell module has hidden cracks, fragments, virtual welding, broken grid and abnormal phenomena of single-chip cells with different conversion efficiency.

光伏组件的三大类问题检测方法赶快收藏起来吧　　功率衰减分类及光伏组件检测方法　　光伏组件功率衰减是指随着光照时间的增长，组件输出功率逐渐下降的现象。光伏组件的功率衰减现象大致可分为三类：　　第一类，由于破坏性因素导致的组件功率衰减; 　　第二类，组件初始的光致衰减; 　　第三类，组件的老化衰减。　　其中，第一类是在光伏组件安装过程中可控制的衰减，如加强光伏组件卸车、倒运、安装质量控制可降低组件电池片隐裂、碎裂出现的概率等。　　第二类和第三类是光伏组件生产过程中亟需解决的工艺问题。光伏组件功率衰减测试可通过光伏组件 I-V 特性曲线测试仪完成。

Three types of photovoltaic modules problem detection methods to quickly collect it

Jiangsu Hongde Technology Development Co., Ltd.

Address: High-tech Industrial Development Zone, Gaoyou City, Jiangsu Province, China

Domestic business-PV division:0514-84241968

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