High-Speed BC Stringer Enables Module Mass Production

As BC (Back Contact) cells emerge as the mainstream direction for photovoltaic technology evolution, their unique rear-side electrode structure imposes far more rigorous performance requirements on stringing equipment compared to conventional machinery. Traditional stringers suffer from issues such as insufficient precision and low throughput, which have long hindered the large-scale mass production of BC cell modules. Addressing these industry pain points, ChinTiyan developed the BC high-speed fully automatic stringer – a machine that breaks through core technical barriers in BC cell stringing and provides the necessary equipment support for the mass production of BC PV modules.

Tackling Industry Pain Points: Solving Mass Production Challenges in BC Stringing

While the structural innovation of BC cells enhances efficiency, it also introduces new manufacturing challenges – a key bottleneck that previously prevented widespread adoption. Traditional PV stringers are designed for conventional cells with front-side busbars; their welding logic, alignment systems, and carrier structures are incompatible with the unique rear-side architecture of BC cells. This incompatibility often leads to quality issues during mass production, compromising module power generation efficiency and service life. Furthermore, the industry has long struggled to balance precision and speed: high-precision welding equipment often lacks the throughput required for mass production, while high-speed equipment frequently falls short on precision, resulting in low product yields and increased manufacturing costs.

Additionally, with the rapid evolution of cell specifications and the simultaneous production of multiple product types, traditional equipment suffers from poor adaptability, cumbersome model switching, and lengthy commissioning cycles, failing to meet the need for flexible manufacturing. To address these challenges across the industry chain, the BC high-speed stringer incorporates comprehensive technical improvements. It abandons legacy architectural designs in favor of cutting-edge technologies, specifically resolving multiple industry-wide issues associated with BC cell stringing. By achieving a balance of four core performance metrics, it is fully capable of meeting both current and future mass production demands for BC cells.

Breakthrough in High-Speed Capacity: Simultaneous Gains in Efficiency and Yield

The BC solar stringer achieves a massive leap in mass production capacity while maintaining ultra-high welding precision, effectively breaking the industry's long-standing trade-off between high precision and low throughput. Utilizing a dual-track parallel high-speed production architecture, the equipment achieves a stable standardized mass production capacity of 6,000 pieces per hour – with peak capacity capable of further increases. It offers over 50% higher production efficiency than traditional BC stringing equipment and more than triple the efficiency of conventional PERC cell stringers. A single unit meets the capacity requirements of a 150MW-class PV module production line, helping enterprises shorten production cycles and scale up mass production.

While operating at high speeds, the equipment delivers outstanding production stability and yield rates. Powered by three core technologies, it maintains a mass-production breakage rate of ≤0.2%, a product yield exceeding 99.5%, and an overall equipment effectiveness (OEE) of ≥95%, significantly reducing material waste and rework costs for enterprises. Mass production data show that adopting this equipment boosts single-line daily capacity from 200,000 pieces (with traditional equipment) to 300,000 pieces, dramatically enhancing capacity output. Simultaneously, the ultra-low breakage and defect rates significantly lower the production cost per watt, truly realizing the dual value of "high-speed mass production" and "quality improvement with cost reduction."

Furthermore, the equipment's high-speed capacity is not limited to a single product specification; it enables simultaneous high-speed production across a full range of cell types. Whether handling mainstream 166mm–230mm full-BC cells or specialized formats like half-cells and one-third-cut cells, it consistently maintains a full-speed output of 6,000 pieces per hour, resolving multiple technical challenges associated with the high-speed soldering of smaller cells and aligning perfectly with current trends in PV module development.

Empowering Industrial Upgrading and Facilitating Large-Scale Adoption of BC PV Technology

As a critical piece of equipment in the PV module encapsulation process, the technical capability of the stringer directly determines the pace at which BC cell technology is commercialized. For a long time, the technical barriers surrounding high-precision, high-speed BC stringing equipment have been a primary factor constraining the large-scale mass production and market adoption of high-efficiency BC modules.

The deployment of the high-speed stringer – characterized by precise process control, exceptional mass-production efficiency, broad compatibility, and stable product quality – successfully resolves key pain points in BC cell mass production and fills a critical gap in high-efficiency PV cell manufacturing equipment. In terms of industrial value, this stringer not only enables photovoltaic manufacturers to upgrade production capacity, improve yields, and optimize costs, but also transforms the high-efficiency advantages of BC cell technology – originally demonstrated in the laboratory – into genuine competitive advantages for industrial-scale production and the market. Leveraging the equipment's exceptional mass-production capabilities, the production costs of high-efficiency BC photovoltaic modules continue to decline while their cost-performance ratio improves significantly. This further accelerates the industry-wide transition toward high-efficiency modules and drives the photovoltaic sector's evolution toward higher efficiency, lower energy consumption, and superior quality.