Application of Beijing Kezhizhi Industrial Camera in Solar Cell Manufacturing (A)

At present, non-contact measurement using machine vision technology has been applied to all aspects of industrial production, but in the actual process of the project, from industrial cameras, industrial lenses, machine vision light sources, image processing software to a complete set of equipment applications, each There are difficulties and difficulties in the selection and application of the link. iJUNCO directly starts from the industry application and provides hardware or software solutions that are consistent with the actual project according to the application to accurately and timely solve problems for customers.

MV-E \ EM Series Industrial Camera

As a country producing photovoltaic modules, the requirements of solar cell manufacturers for their products and the company's production capacity continue to increase, and the manual inspection currently commonly used is far from meeting the requirements of various manufacturers. Reforming traditional inspection methods and improving production efficiency is already Manufacturers and equipment manufacturers are eagerly pursuing the following. Take machine vision technology for silicon wafer inspection as an example.

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As an important raw material for solar cell production, silicon wafers need to go through the process of cleaning and texturing → diffusion → etching → PSG → PECVD → screen printing → sintering → test binning.

Testing requirements:
Etching is an important part of the production process of battery chips. Before etching, it is necessary to identify the front and back of the silicon wafer that has been flocked and diffused, scratch detection, damage detection, and size detection.

Solar Panel-Polysilicon

Technical Difficulties:
Diverse and irregular patterns on silicon wafers;

The external light changes, and the collected image changes irregularly;

Silicon wafers are fragile and easy to cause damage;

Silicon wafers are thin and easily adhere to each other.

Solar cells-polysilicon

Solution:



After a long period of providing testing products and solutions with photovoltaic companies, iJUNCO has accumulated experience, and according to the product characteristics of the photovoltaic industry, improved MV-EM series industrial cameras for solar panels, combined with Vessel image production industry Lens, etc., for high-definition image acquisition of silicon wafers, using special software algorithms for processing and judgment; meanwhile, hardware solutions for industrial cameras can be provided separately, and overall solutions for photovoltaic products can also be provided.

Machine vision LED light source is used to make a dark box to isolate the entire vision module from external light;

Using electrical automation technology to grasp silicon wafers with high precision and no damage.

iJUNCO can provide industrial camera hardware solutions alone, as well as overall solutions for photovoltaic products.

Solution advantages:



High space utilization, one station can collect and inspect the front and back of the silicon wafer;

High detection efficiency, one computer can handle multi-station detection at the same time;

High degree of automation, the entire process of detection, transmission, rejection and turnover is automatically completed without manual intervention;

The false detection rate is low, and the stability is good, and the targeted algorithm is used for detection.

Application development:



In other process steps of cell production, visual inspection can be used to detect appearance defects and scratches.