Candidate unit: Guangzhou Supersonic Automation Technology Co., Ltd.

Candidate Name: Application of Machine Vision System in Lithium Battery Electrode Appearance Defect Inspection

Technological innovation and advancement:

1. Key technical problems to be solved  . The key to the defect detection system is to study the optical path structure of defect detection, design the lighting method that highlights the defect features as much as possible, and obtain defect images with high grayscale contrast from the source.
2. Visual information processing and analysis technology. Image processing is the core of the inspection system based on machine vision, and the quality of its algorithm is the key to the success of the system.
3. Synchronization technology of detection system and mechanical control system
When the product is in place and needs to be detected, the mechanical control system should immediately notify the visual detection system to carry out image acquisition and processing, and after processing and judgment, in order to make a reasonable response .

Second, innovations
(1) Two sets of 5-megapixel area array CCD cameras are used to simultaneously detect plastering defects on both sides of the pole piece , and with high-precision rotary encoder and linear optical fiber, it is used to detect paste dislocation, paste length, and other defects. The accuracy can reach within plus or minus 2mm, which meets the technical requirements of battery manufacturing and dynamically displays various defects. .
(2) Study the algorithm suitable for battery pole piece image processing, realize real-time collection and display of defect images, and analyze the specific process of battery pole piece online detection, including image acquisition, information processing, and feature extraction;
(3) The visual detection system is equipped with a fully automatic servo motor retractable mechanism. The detection speed is fast, up to 25 m/min. It can distinguish metal leakage foils with a diameter greater than 0.2mm, and a set of stable and reliable yellow stickers is installed. Labeling system, all bad pole pieces are marked with yellow bad marks.
3. Technical level and main performance indicators
The fully automatic testing machine for lithium battery cell materials developed by this project has broken the domestic dependence on imported products. The accuracy of the equipment can reach within plus or minus 2mm, and the detection speed is fast, up to 25 m/min. It can distinguish metal leaks with a diameter greater than 0.2mm. difference.
(1) The detection speed is fast, and the reliable detection of 25-30 pieces/minute can be realized, which can replace the workload of 5-8 people;
(2) The metal leakage foil with a diameter greater than 0.2mm can be distinguished;
(3) Two sets of 5-megapixel area array cameras are used for high-speed capture and fast processing. Each image is captured within 40ms and the analysis results are sent to the controller (PLC);
(4) It can detect exposed-coated pole pieces with a diameter of not less than 0.5mm.

Market competitiveness:

Currently, Supersonic has core technologies with high threshold in the industry, mainly in the three major fields of visual image recognition technology, motion control technology, and precision mechanical design and manufacturing technology. The big core field has made a lot of achievements, and it is expected to establish industry standards in the above three technical fields. Competing with foreign equipment is to reduce costs and provide faster and high-quality services under the premise of guaranteed performance. However, most of the competitors of domestic equipment are in their infancy, and foreign countries still occupy the main market share, so there is no need to compete with domestic counterparts on price, but to pay more attention to the competition of the functions and benefits of the products themselves. Invest more cost and manpower in R&D to quickly and professionally respond to the changing needs of customers.
Now, Supersonic has five core products: Smartphone-related electronic components automatic placement equipment, FPC/PCB automatic placement equipment, precision component size automatic measuring instrument, lithium battery material AOI defect visual inspection system, 3D visual trajectory measurement Tracking system, and quickly put into actual operation in leading companies in the industry such as HUAWEI, APPLE, MICROSOFT, ABB, JABIL, HUAWEI, Han's, Flextronics and Midea.

Customer word of mouth:

Seize the top customers in the domestic industry and customize various placement and visual inspection equipment for them. The technology is based on advanced equipment from Japan and South Korea. Realize a substantial reduction in manufacturing equipment input costs and ensure its quality. The top customers in the industry are mainly Huawei, OFILM, Truly Semiconductor, Sunny Optical, etc. After the top customers use it, the medium-sized enterprises in the circle will establish a good image, and the product will be more easily recognized and accepted quickly. At the same time, the demand of top customers is relatively large, which has sufficient guarantee for the improvement of previous performance. And lay a solid foundation for the large-scale promotion of later channels.
Generally speaking, the key purchase factors for customers are mainly to consider the accuracy, stability, production speed, yield rate, price, and technical support of the equipment. To provide customers with high-quality automation solutions and technical services is the unremitting pursuit of Supersonic. The pursuit of the goal is to maximize the customer's experience in using the product and realize the customer's value proposition. and quality of service. In competition with domestic and foreign competitors, Supersonic has competitive advantages in terms of equipment performance and supporting services.