In the photovoltaic industry, which is full of challenges and opportunities, heterojunction technology is regarded as an important engine to promote the high-quality development of the industry. In order to deeply explore the innovation and industrialization path of heterojunction technology and promote the sustainable development of the photovoltaic industry, the third technical meeting of the Collaborative Innovation Platform for Heterojunction Technology Industrialization was held in Xuancheng, Anhui Province on May 11, 2024.
The conference was hosted by Huasheng New Energy, the rotating host of the third phase of the high-efficiency heterojunction 740W+ club, and brought together experts, scholars and business representatives from various fields of the photovoltaic industry to discuss the innovative application and industrialization process of heterojunction technology. The conference mainly focused on 0BB technology, heterojunction slurry technology, polysilicon and wafer technology, etc., and strived to explore a more efficient and sustainable development strategy through technological innovation and development.
0BB is widely used
Empower heterojunctions to reduce costs and increase efficiency
Technology R&D and innovation is the cornerstone of industrial development, Sheng Chenxin, sales director of Suzhou Myway Technology Co., Ltd., based on busbarless modules and related technologies, introduced Myway's HJT innovation cost reduction road and NBB technology industrialization plan from the aspects of busbarless module design, technical solutions, humidity and power, and reliability evaluation, reflecting its many advantages in reducing silver consumption, compatible equipment, CTM improvement, and high-standard verification.
In addition, Wu Yonggang, deputy general manager of Ningxia Maverick Automation Equipment Co., Ltd., also expounded the reasons for choosing IFC for the series connection of busbarless batteries at the meeting, solved the problem of battery series connection after battery + 0BB+ thinning of different technical routes through IFC, and introduced the latest progress of direct lamination (IFC) and the road to cost reduction and efficiency increase of crystalline silicon module packaging in the future.
As one of the important technologies in the field of photovoltaic manufacturing to reduce costs and increase efficiency, 0BB technology has always been very popular. Zhang Libin, technical director of Shenzhen Guangyuan Intelligent Equipment Co., Ltd. (hereinafter referred to as "Guangyuan"), shared his technical sharing on the exploration and mass production of HJT 0BB stringer technology, introduced a series of advantages of 0BB technology in cost reduction, efficiency improvement and platformization, and shared the successful exploration and effective results of mass production application of 0BB printing Internet technology.
Low-temperature metallization innovations
Achieve precise efficiency improvement and continuous cost reduction
As one of the key raw materials for photovoltaic cell manufacturing, paste directly affects the performance and efficiency of photovoltaic cells. Miao Cheng, marketing manager of Changzhou Juhe New Materials Co., Ltd., introduced the realization path of HJT low-temperature paste to improve efficiency and reduce costs through the four modules of main grid cost reduction, fine grid sterling silver paste, silver-clad copper paste and non-wire mesh solution, and shared the development progress of low-cost and high-efficiency HJT paste.
As one of the important steps in the photovoltaic cell manufacturing process, the metallization process is essential for the performance and durability of photovoltaic cells. How does HJT reduce costs and increase efficiency in the metallization direction? Meng Xianghao, technical director of Suzhou Silwei Nano Technology Co., Ltd., gave their cost reduction plan from the aspects of cost, efficiency and mass production capacity, and Silvi believes that through double-sided power generation, thinning, low attenuation, as well as process optimization and process simplification, the advantages of HJT are gradually emerging.
From materials, processes to industrialization, HJT's metallization process is full of challenges, Wuxi Dike Electronic Materials Co., Ltd. (hereinafter referred to as "Dike") product director Chen Cong introduced their metallization breakthrough: contact resistance is the key, bulk resistivity is the foundation, fine line printing is the path. Based on the in-depth development and application of silver-clad copper technology, Dike has achieved the goal of improving efficiency and reducing costs of HJT metallization.
Through the optimization of the conductivity of low-temperature slurry, the innovation of slurry fine line printing technology, and the improvement of silver-clad copper fine grid paste, Hong Wei, senior director of R&D of Suzhou Jingyin New Material Technology Co., Ltd., made a report on the research and development progress of heterojunction and tandem low-temperature slurry, focusing on the precise efficiency improvement and continuous cost reduction of heterojunction slurry, and at the same time in-depth study the improvement of the reliability of heterojunction slurry and sharing the application progress of perovskite and tandem cell paste.
Regarding the exploration of metallization technology, Huang Hui, technical director of Anhui Baoshengyuan New Materials Co., Ltd., introduced the cost reduction path of metallization technology of HJT batteries and the application status of silver-clad copper powder in HJT batteries, and put forward a series of countermeasures for the challenges faced by silver-clad copper powder in the background of less silver.
Silicon wafer technology innovation
Promote the process of cost reduction and efficiency improvement of heterojunctions
In the innovation and development of silicon wafer technology, Zhou Feng, general manager of Honghui New Energy (Anhui) Co., Ltd., elaborated on its innovative exploration in the field of edge skin square slicing technology and multi-element doping agent co-doping, through the path of silicon wafer impurity absorption and thinning, combined with new single crystal technology, to help reduce the cost and increase the efficiency of heterojunction cells.
In the face of fluctuations in the market environment and industry development trends, Shuangliang Silicon Materials (Baotou) Co., Ltd. continues to reduce the cost of electricity by accelerating the iteration of new and old technologies, and always maintains a cost advantage. Driven by technological innovation to increase product efficiency, Gao Xiang, director of Shuangliang R&D Department, has continued to increase efficiency and reduce costs in collaboration with the industrial chain by optimizing process design, improving the matching degree of raw and auxiliary materials, and enhancing on-site management.
The data proves the strength
Strong advantages promote scenario-based innovative applications
Zhang Yang, Technical Director of the National Photovoltaic (Electrical) Product Testing Center (hereinafter referred to as "Guojian") of CTC Group, shared the empirical data and requirements of heterojunction modules in high temperature and high humidity environments. By comparing the data of different empirical schemes over the years, the national inspection found that the power generation performance of HJT modules is stronger in high temperature and high humidity environments, and the power generation advantage of HJT modules will be further improved by the increase of ambient temperature, and at the same time, it has a lower power attenuation rate.
Tian Jiehua, head of Huasheng New Energy Product Development Management Center, also shared the full-scene application solution of Huasheng HJT products, introduced the leading technology of Huasheng HJT and the excellence of production capacity, and demonstrated the Everest · G12R series, Himalayan · G12 series, Himalayan · The G10 series, new busbar-less technology, and heterojunction products with rich application scenarios fully demonstrate the advantages of Huasheng HJT such as high efficiency, low attenuation, low temperature coefficient, high bifaciality, good low-light performance, high power generation, and low carbon footprint. While further strengthening everyone's understanding of Huasheng heterojunction technology, it also brings new ideas and impetus to the development of the industry.
Promote technical exchanges
Build a heterojunction industry ecology together
In order to further promote heterojunction technology and enhance the understanding and cognition of the industry inside and outside the industry, Huasheng New Energy held the launching ceremony of the heterojunction lecture hall at the meeting, hoping to create an open and shared learning platform for the entire industry in this way, and provide opportunities for all parties to understand and master heterojunction technology. Xu Xiaohua, chairman of Huasheng New Energy, said: "It is necessary to let more upstream and downstream partners, cooperative customers, and design institutes in the industry understand heterojunction, use heterojunction, and benefit from heterojunction." The "HJT Lecture Hall" will further speak out through the sharing of technical knowledge, so as to promote the wide recognition and application of HJT technology in the photovoltaic industry, and inject new vitality and impetus into the development of clean energy.
Huasheng New Energy signed a strategic cooperation framework agreement with Jingcheng New Energy Investment Co., Ltd. and China Power Investment Ronghe Financial Leasing Co., Ltd., aiming to deepen the coordinated development of the entire industrial chain and cooperate with strategic partners in the industry. Through the linkage of power station business, the high-quality development of the heterojunction industry will be promoted. With the continuous verification and breakthrough of heterojunction technology in power station applications, its significant advantages in power station applications are gradually becoming more and more well-known. Huasheng New Energy will work together with all parties to achieve the long-term strategic goal of sustainable energy development.
Cost reduction and efficiency improvement have always been the two eternal propositions of industrial development, and this conference will jointly explore various ways and directions to reduce costs and increase efficiency from polysilicon, silicon wafers, pastes, processes, technologies and other multi-point collisions. Through further in-depth research and discussion on the goal of reducing costs and increasing efficiency, we will more accurately determine the optimization strategy of each link, help improve product efficiency and stability, and further achieve large-scale application, so as to better meet the demand of the photovoltaic market, promote the expansion of clean energy technology to a wider range of application fields, and contribute to the realization of sustainable development goals.