SoleFiori Technology Company (SoleFiori) recently celebrated a breakthrough in intellectual property achievements. Three core xBC technology patents independently developed by the company—Method for Manufacturing xBC Photovoltaic Cells, Method for Laminated Assembly of Photovoltaic Modules, and Method for Fabricating Prefabricated Circuits on Back Glass. The approvals, issued by the China National Intellectual Property Administration, highlight the company’s forward-looking approach and technical depth in xBC. The patents expand SoleFiori’s HJT portfolio and open the HJT+BC route. They also demonstrate breakthroughs in BC cell industrialization, laying a foundation for future innovation of cell technology.

The three patents granted complement each other, forming a complementary xBC system from core components to finished products. The first enables efficient cell manufacturing; the second addresses reliable encapsulation of high-performance cells; the third provides a high-performance circuit substrate. They support large-scale production of HJT-based BC cells (HBC).

Method for Manufacturing xBC Photovoltaic Cells

This patent establishes a full-chain AI-manufacturing process for high-efficiency xBC cells, covering the entire innovative process chain from crystalline silicon substrate processing to the final product. It optimizes steps such as precise doping, passivated contact, laser patterning, stress-free electrode interconnection, and modular integration‌. Combined with HJT’s passivation strengths, the process significantly improves conversion efficiency and open-circuit voltage of HBC cells.

Method for Laminated Assembly of Photovoltaic Modules

This patent further addresses the challenge of achieving efficient and reliable encapsulation of xBC cells at the module level. It offers an innovative laminated assembly technique, particularly suited for the low-temperature characteristics of HJT cells. By refining backsheet film with pre-cut openings, precision alignment of multiple material layers, and low-temperature soldering, it enhances power output while protecting HJT structures. The method improves mechanical load capacity and long-term reliability.

Method for Fabricating Prefabricated Circuits on Back Glass

This patent defines a demonstration technology for the micro-precision manufacturing of back-contact circuits, safeguarding an innovative approach to precisely constructing high-performance conductive circuits on glass substrates. It is central to enabling the HBC structures with 0BB and full back contact. The method aligns with HJT’s amorphous silicon and TCO layers, reducing resistance losses, increasing current collection, and improving both efficiency and aesthetics.

Through this patent portfolio, SoleFiori has established a systematic IP framework for cross HJT-BC technologies, reinforcing its lead in the HJT+BC solar sector. Building upon this tech milestone, SoleFiori’s mission has become increasingly clear: to build on HJT as a foundation, use BC as a breakthrough, and drive tech convergence and innovation. SoleFiori pledged to continue R&D investment, deliver higher-performance products to the market, and contribute a SoleFiori solution to the global carbon neutrality goal.