Evolution of String Welding Machine Technology and Industry Expertise

Over a decade of rapid growth in the photovoltaic industry, string welding machines—as core equipment in module production have profoundly impacted the efficiency and quality of the PV supply chain through technological iterations and performance enhancements. ChinTiyan New Energy, through its precise grasp of technological trends and continuous innovation, has established a comprehensive product portfolio in the string welding machine sector. This portfolio encompasses multiple technical approaches and diverse specifications, providing robust support for the industry's technological advancement.

I. MBB Technology: Precision Welding, Efficient Cost Reduction

MBB (Multi-Busbar) technology is the mainstream solution in current photovoltaic module production. By increasing the number of busbars, it effectively reduces silver paste consumption and enhances current collection capacity. ChinTiyan has developed multiple string welders tailored to different cell sizes and busbar designs based on the characteristics of MBB technology.

Take the CTM-60BC string welding machine as an example. This equipment is specifically designed for large-size 182mm and 210mm cells, achieving a welding speed of up to 6,000 half-cells per hour to meet mass production demands. Its core welding module employs laser positioning and intelligent vision recognition technology, controlling positioning accuracy within ±0.05mm to ensure precise alignment between the weld ribbon and the cell. During welding, optimized heating temperature and pressure parameters achieve industry-leading joint strength with a microcrack rate below 0.1%, effectively ensuring long-term module reliability.

Regarding silver paste consumption control, the CTM-60BC reduces silver paste usage per cell by over 15% compared to traditional equipment through refined welding process design. Additionally, the equipment accommodates solder ribbons of varying widths and thicknesses, allowing flexible adjustment of welding parameters based on cell characteristics to further optimize cost structures. Practical application data indicates that MBB modules produced using this equipment exhibit over 3% lower power loss compared to conventional modules, demonstrating significantly enhanced power generation efficiency.

II. SMBB Technology: Ultra-Fine Grid Lines, Performance Leap

With the mass production of new cell technologies like TOPCon and HJT, SMBB (Super Multi-Busbar) technology has emerged as a new industry focus. Its finer busbar design further reduces silver paste consumption while enhancing cell tolerance to microcracks and busbar breaks. ChinTiyan New Energy stays at the forefront of this trend by introducing the CTM-S150 string welding machine, delivering an efficient production solution for next-generation cell technologies.

The CTM-S150 supports welding with ultra-fine ribbons below 0.2mm, achieving a welding speed of 15,000 half-cells per hour to meet mass production demands for high-efficiency cells. Its unique welding process, featuring optimized heating curves and pressure control, ensures robust bonding between ultra-fine ribbons and cells, delivering a weld yield exceeding 99.5%. Additionally, the integrated AI vision inspection system monitors welding quality in real time, accurately identifying defects such as cold solder joints and misaligned welds to prevent defective products from entering subsequent processes.

Regarding compatibility, the CTM-S150 supports multiple cell sizes and busbar designs, enabling rapid production switching for different module specifications. Its modular design facilitates maintenance and upgrades, reducing operational costs for customers. According to industry test data, SMBB modules produced using this equipment reduce silver paste consumption by over 20% compared to MBB modules while boosting power generation efficiency by more than 0.5%, providing robust support for cost reduction and efficiency enhancement in the photovoltaic industry.

III. 0BB Technology: Main Gridless Revolution, Efficiency Breakthrough

As a future development direction, 0BB (Main Gridless) technology eliminates the main grid silver electrode by directly interconnecting fine grids with solder ribbons. This effectively reduces silver consumption and shading area while enhancing power generation efficiency. ChinTiyan New Energy has achieved significant breakthroughs in 0BB technology R&D, launching the CTM-0BB series solder ribbons machine to lead the industry's technological transformation.

It adopts a unique composite welding and dispensing process. By precisely controlling ribbon positioning and adhesive volume, it ensures robust cell-to-ribbon bonding while eliminating shadowing issues during EL testing. With a welding speed of 10,000 half-cells per hour and positioning accuracy of ±0.03mm, it meets the high-precision production demands of 0BB modules. Its AI vision system provides full-process monitoring of welding quality, achieving 99.8% accuracy in identifying minute defects, delivering reliable assurance for module quality.

Regarding compatibility, the CTM-0BB series supports multiple cell thicknesses and fine grid designs, accommodating 0BB cell production across different technological approaches. The equipment features a modular structure for rapid replacement of welding modules and dispensing systems, accommodating customized requirements from different customers. Feedback from practical applications indicates that 0BB modules produced using this equipment reduce silver paste consumption by over 50% compared to SMBB modules while boosting power generation efficiency by more than 1%. This opens new pathways for technological advancement and cost optimization within the photovoltaic industry.

IV. Intelligence and Flexibility: Technology Convergence, Leading the Future

In response to the photovoltaic industry's heightened demands for production efficiency and flexibility, ChinTiyan deeply integrates intelligent and flexible technologies into its string welding machine design. Its equipment incorporates digital twin technology, optimizing production processes through virtual simulation and predicting equipment failures in advance, reducing downtime by over 30%. Additionally, the equipment supports remote monitoring and data analysis, enabling customers to track production status in real time, optimize production parameters, and enhance overall operational efficiency.

For flexibility, ChinTiyan New Energy's string welders feature a modular design enabling rapid changeovers and customized production. The equipment accommodates cells of varying sizes and shapes, with changeover times reduced to under 10 minutes to meet diverse module manufacturers' needs. Its intelligent material management system automatically identifies cell and ribbon specifications, enabling precise material allocation and automated feeding to further elevate production line automation.

ChinTiyan New Energy has established a comprehensive product portfolio of string welding machines covering all technical routes—including MBB, SMBB, and 0BB—through continuous technological innovation and product iteration. Its equipment delivers core advantages of high precision, high efficiency, and high compatibility, providing robust support for technological advancement and industrial upgrading in the photovoltaic sector. Looking ahead, as photovoltaic technology continues to evolve, ChinTiyan will deepen its commitment to the string welding machine sector, driving the industry toward higher efficiency and lower costs.