Emergence of Next-Gen Photovoltaic Welding Technologies

Amid the accelerating transformation of the global energy landscape, the photovoltaic industry is thriving with an annual growth rate exceeding 20%, emerging as a core driver of the green energy revolution. As a critical component in module manufacturing, the technological evolution of automatic string welders directly determines the industry's efficiency and cost boundaries. In this technological race, ChinTiyan New Energy has redefined the standards for efficiency and quality in photovoltaic welding through the deep integration of dual-mode welding technology, ultra-speed design, and modular design.

I. Dual-Mode Welding Technology: Pushing the Boundaries of Efficiency and Compatibility

ChinTiyan's core equipment integrates electromagnetic induction and hot-press welding into a complementary “golden combination”:

•Electromagnetic Induction Welding Module: Achieves non-contact fusion via high-frequency eddy currents, delivering weld strength up to 95N/mm² with uniformity error ≤±0.05mm. Perfectly compatible with multi-size cells (156-230mm) and multi-busbar weld strips (9BB-16BB).

This technology eliminates physical contact damage entirely, elevating welding stability to industry-leading levels.

•Thermal Pressure Welding Module: Integrates infrared heating with closed-loop pressure control, compressing welding time to 0.3 seconds per point while reducing the heat-affected zone by 30%.

Its proprietary dynamic temperature field algorithm maintains temperature fluctuations within ±2℃. Combined with a low-temperature welding process at 230℃, this reduces cell microcrack rates from the industry average of 0.3% to below 0.05%.

This breakthrough design has passed mass production verification by leading enterprises like LONGi and Trina Solar, demonstrating exceptional performance in large-size cell welding.

II.BC Series Equipment: Redefining Mass Production Speed

ChinTiyan BC ultra-high-speed scribing-welding integrated machine CTM-S150 and fully automated BC string welding machine lead the industry with disruptive performance:

•CTM-S150 Scribing-Welding Integrated Machine: Achieves a single-machine capacity of 15,000 half-cells per hour, more than tripling traditional equipment output.

High-precision servo systems and intelligent vision positioning technology enable fully automated closed-loop control, setting a new mass production efficiency record for BC modules at the 2025 SNEC PV Expo.

•Fully Automatic BC String Welder: Utilizing laser welding technology, it achieves a peak dual-line production rate of 7,200 pieces per hour with a stable production rate of 6,000 pieces per hour.

Compatible with 166-230mm cell sizes and supporting multi-cell simultaneous welding, it has become the preferred equipment for large-scale PV enterprises.

III. Hot Press Welding Module

The following technological designs reduce the risk of hidden cracks in solar cells:

1. Welding Time Optimization

Welding time reduced to 0.3 seconds per point, significantly shortening thermal stress duration and minimizing internal stress accumulation caused by prolonged heating.

2. Heat-Affected Zone Control

The heat-affected zone is reduced by 30%. Precise control of temperature gradients in the welding area prevents microcrack propagation caused by localized overheating.

3. Dynamic Temperature Field Algorithm

Equipped with a dynamic temperature field closed-loop control system, welding temperature fluctuations are maintained within ±2°C, eliminating the impact of sudden temperature changes on brittle silicon wafers.

4. Low-Temperature Welding Process

Utilizes low-temperature welding technology (peak temperature 230°C), reducing temperatures by 30-50°C compared to traditional methods to minimize interface stress caused by thermal expansion differences.

5. Pressure Closed-Loop Control

Integrated pressure closed-loop control system dynamically adjusts welding pressure in real time, preventing mechanical damage from excessive or uneven pressure distribution.

Technical Synergy

Through precise tri-parameter control of temperature, time, and pressure, the hot-press module reduces welding thermal stress by 42% and lowers microcrack incidence from the industry average of 0.3% to below 0.05% (based on actual test data from ChinTiyan equipment). This module has passed mass production validation by companies including LONGi and Trina Solar, demonstrating stable performance in welding large-size cells ranging from 166mm to 230mm.

Conclusion

ChinTiyan New Energy wields technological innovation as its spear and customer needs as its shield, erecting insurmountable technical barriers in photovoltaic welding. From dual-mode welding to the BC series equipment, and from 5G applications to energy storage extensions, the company continuously pushes the efficiency limits of PV manufacturing with over 30% annual R&D investment. Driven by the dual carbon goals, ChinTiyan will continue to empower the industry through technology, delivering Chinese solutions for the global energy transition.