T1: TOPCon R&D
T2/T3:
NBC+THL+ Module Integration
R&D Pilot Line
NBC+THL+ Module Integration
R&D Pilot Line
T4: Expand Module Pilot Test Line
T5: PV Testing Center:
Module Reliability Lab
Materials Lab
Cell Testing Center
Module Reliability Lab
Materials Lab
Cell Testing Center
T6: R&D Workshop:
HJT+THL Integrated R&D Pilot Line
Perovskite Cell Lab, etc.
HJT+THL Integrated R&D Pilot Line
Perovskite Cell Lab, etc.
Tongwei Global Innovation R&D Center
R&D Center Planning
Tongwei Global Innovation R&D Center is located at TW Solar Energy Shuangliu Base, west of Xihanggang Avenue and south of Shuangxing Avenue. The total planned area is 113,000 square meters (excluding supporting facilities), which has achieved short-and long-term planning of the Center, and completed one-time planning for living areas, R&D centers, comprehensive administrative areas and related supporting facilities. Relevant R&D supporting facilities: including supporting facilities such as metal processing and special gas.
Research directions include high-efficiency crystalline silicon cells and materials, high-efficiency and high-reliability modules, photovoltaic testing and analysis, new technologies, etc., with a particular focus on the development of core technologies and cutting-edge technologies in the fields of TNC, THC, TBC cells and modules, copper interconnection metallization, perovskite/silicon tandem solar cells, new photovoltaic modules, etc. Furthermore, the Global Innovation R&D Center is committed to the analysis and characterization of materials and devices, reliability testing and evaluation of module products, etc.
HJT Copper Interconnection and
Perovskite Cell Integrated Workshop
Perovskite Cell Integrated Workshop
Tongwei has built an integrated HJT copper interconnection and perovskite cell workshop with the largest workshop area, the highest production capacity, and the strongest upgradability. This workshop is suitable for the development of new technologies in the next 5 to 10 years.
Module Reliability
Laboratory
Laboratory
Tongwei has built a module reliability laboratory with the largest standalone area, the most inclusive test items, and the highest level of intelligent automation, providing solid hardware support for the company’s R&D work.
High-efficiency Cells and Modules
The main R&D base of Tongwei‘s PV technology center is Tongwei Global Innovation R&D Center. It’s located in Chengdu of Sichuan Province and has branches in cities including Hefei of Anhui Province. Currently, Tongwei has made important breakthroughs in mainstream technology fields such as TOPCon, HJT, BC, and perovskite/silicon tandem solar cells.
TOPCon
First in Industry -- Large-size PECVD Poly deposition technology route
Another Record -- TNC 210 module reached a maximum output power of 743.2W in May 2024
HJT
First in China -- GW-level HJT production line
First in Industry -- 210mm half-cell HJT project development
First in Industry -- Bifacial microcrystalline development
Ninth Records -- THC210 high-efficiency module reached a maximum output power of 776.2W in October 2024, refreshing the record for the ninth time
Advanced Technology
BC -- N-type TBC R&D efficiency reached 26.66% in 2024Q2
Perovskite/Silicon Tandem -- R&D efficiency reached 33.30% in 2024Q3
Technology Center of Yongxiang Co., Ltd.
Yongxiang Co., Ltd., a subsidiary of Tongwei Co., Ltd., has three provincial-level R&D platforms: Sichuan Provincial Polysilicon Engineering Technology Research Center, Sichuan Provincial High-Purity Crystalline Silicon Preparation Technology Engineering Lab, and Tongwei Semiconductor R&D Center.
Electronic grade polysilicon preparation technology
High-purity crystalline silicon manufacturing energy-saving technology and equipment development
High-purity crystalline silicon intelligent manufacturing technology
Polysilicon system steam cascade utilization technology
Reduction furnace one-start full-process automation technology
Low energy consumption and zero emission polysilicon green preparation technology and system integration technology
High-purity Crystalline Silicon
Yongxiang Co., Ltd., a subsidiary of Tongwei, has established a polysilicon engineering technology research center, an enterprise technology center, a high-purity crystalline silicon preparation engineering lab, and a postdoctoral innovative practice base. By the end of May 2024, Yongxiang had applied for 952 patents and had 644 valid patents.
Core Technologies
Cold Hydrogenation
Anti-disproportionation
High-efficiency Reduction
Tail Gas Recovery
High-boiling-point Cracking
320+ Patented Technical Achievements
Comprehensive Cascade Utilization of Thermal Energy
Automated Control of Electrical Devices
Closed Circulation of Chlorine and Hydrogen Elements
Large-scale Energy-saving Distillation
Continuously Iterated and Upgraded Processes and Technologies
1G
Thermal Hydrogenation Technology
2G
Hydrogen Tetrachloride Self-circulation Technology
3G
Small-scale Cold Hydrogenation Technology
4G
Large-scale Cold Hydrogenation Technology
5G
5G Yongxiang Method
6G
Reactive Distillation Technology
7G
7G Yongxiang Method
8G
8G Yongxiang Method