The "SNEC Photovoltaic Conference and Exhibition (Shanghai)" has grown from 15000 square meters in the first session in 2007 to 150000 square meters in 2020. More than 1300 companies from 95 countries and regions around the world have participated, making it the most influential international, professional, and large-scale photovoltaic event in China, Asia, and the world.
On June 3-5, 2021, the world's largest photovoltaic exhibition with industry indicators - "SNEC Photovoltaic Conference and (Shanghai) Exhibition" was held as scheduled at the Shanghai New International Expo Center.
WPL made its debut at this exhibition with PERC back components, SE front components, OS imaging components, and more.
The OS imaging component is a light source component independently developed and produced by WPL for defect detection in photovoltaic raw silicon wafer loading and post fabrication processes. The principle is to utilize the high transmittance of near-infrared laser on the silicon wafer, allowing most of the laser to penetrate the wafer. In conjunction with an industrial camera that is sensitive to near-infrared light, it is placed on the other side of the wafer for imaging, in order to observe the internal and external defects of the wafer.
The PERC back component is an integrated imaging component independently developed and produced by WPL for laser point detection on the back of PERC battery cells. Its detection principle is to use the good directionality of the laser to irradiate a special angle of laser on the back of the battery cells. By utilizing the different reflectivity of the laser points and the battery cells, combined with a high-resolution linear array industrial camera, the missing and offset of the laser points can be detected.
The SE front component is an integrated imaging component independently developed and produced by WPL for detecting laser points on the front of battery cells. Its detection principle is to use the good directionality of the laser to irradiate a special angle laser on the front of the battery cells. By utilizing the different reflectivity of the laser points and the battery cells, combined with a high-resolution linear array industrial camera, the missing and offset of the front laser points can be detected.
