Jolywood continues to develop TOPCon technology! Jolywood Solar Energy assists in the creation of a 100 billion PV industry cluster in Shanxi – EQ Mag
Two highlights of the Jolywood TOPConcell: High efficiency and Safety…
February 2021 – Shanxi Jolywood Solar Energy Cell Technology Co., Ltd. is a wholly-owned subsidiary of Jolywood Corporation.The company has always adhered to the concept of advanced high-efficiency technology, and is committed to the development, manufacture and sales of N-type TOPCon bifacial cells.
In the words of President Zhao: “At present, the first 4GW of Shanxi Jolywood Solar’s 16GW per year intelligent high-efficiency monocrystalline cell factory project has entered the mass production phase, while the subsequent 4GW and second 8GW projects are in progress and on schedule.Our company plans to complete overall construction in 2023, in order to accelerate the release of our high-efficiency cells and ensure large-scale mass production.”
President Zhao described how Shanxi Jolywood Solar showcased three cell products at the exhibition: 0BB high-efficiency cells without main grid, 182-16BB08-SE monocrystalline bifacial n-type TOPCon cells (conversion efficiency ≥ 25.5%), and 182-16BB super high-efficiency monocrystalline bifacial n-type TOPCon cells (featuring a maximum conversion efficiency of 26.7%). At the same time, the above three cell products also feature good reliability, pleasing aesthetics, a bifacial rate ≥ 80%, a power temperature coefficient as low as -0.30%/°C, no photogenic attenuation, and excellent low light response performance.
“Jolywood is the only company to apply PVD technology to the production of TOPCon cells,and has developed thanks toits unique POPAID technology. The company’s TOPCon cell products can achieve a high degree of safety with no winding, as well as full edge isolation with no leakage. As a result, in addition to ‘high efficiency’, ‘safety’ is another highlight of Jolywood’s TOPCon cells”.
Mr. Zhang Fulong, President of in-en.com and the Guoneng Energy Research Institute, presented Jolywood Sunwatt and Shanxi Jolywood Solar with the awards for”Best N-type Module Auxiliary Material Solution Supplier” and “Best n-type Module High Efficiency Cell Supplier”. “This is another recognition and affirmation of Jolywood’s outstanding capabilities.”
2022-2023 Best N-type Module High Efficiency Cell Supplier
Shanxi Jolywood Solar Cell Technology Co., Ltd.
Zhang Fulong, President of in-en.com and the Guoneng Energy Research Institute, awarded Jolywood SunwattNew Materialthe prize for”Best N-type Module Auxiliary Material Solution Provider”. Jolywood has always upheldits corporate philosophy of “low carbon, energy savings, and technological innovation”, and is committed to developing high efficiency, low carbon, high quality, reliable products through n-type TOCPon technology. Jolywood is taking action to implement its green low-carbon plan, promoting global energy transformation through technological innovation, benefiting thousands of households, creating a green zero-carbon future, and continuously providing support for China’s peak carbon and carbon neutrality goals!
The “Wind-proof Module”, which was officially announced at the Jolywood “Ultra High Efficiency, Ultra Low Carbon” Technology Summit, made its debut at the SNEC booth. This product is an important R&D achievement based on Jolywood J-TOPCon 2.0 technology, combining a number of advanced technologies such as the Wind-proof frame, 0BB busbar-free cell and ceramic backsheet. The Wind-proof module features a BACKBONE elastic cavity design, enhancing the buffering pressure of the frame, and further ensuring the module’s load-bearing capacity under dynamic wind pressure, thus ensuring the device is not affected by complex wind pressure environments.Compared with traditional PV modules, Wind-proof modules feature 2.0 to 3.2mm front glass thickness + a 300um ceramic backsheet; thisensuresgood hardness with ultra-low carbon content, and compared with double-glass modules, power generation per watt can be increased by 1.29% and weight reduced by 10-20%. This decreases the risk of pressure on the roof and brings the product in line with the concept of a green, low-carbon lifestyle.Itsoutstanding product performances make the module suitable for a variety of applications – it is a true flagship product that can ensure high power generation and high yield to large ground power plants. It also meets the demands for low-carbon, aesthetically pleasing, and high-efficiency household electricity consumption.
Jolywood has been recognized by PVEL (PV Evolution Labs) as one of the world’s “Best Performance” companies thanks tobased on the outstanding reliability and performance of its products. PVEL is the world’s leading independent PV module testing laboratory, which annually evaluates the reliability and performance of PV modules through stringent testing above IEC certification standards, and is the industry’s key measure of long-term reliability and superior performance of PV modules.The stringent testing conditions mean that only a very small number of PV manufacturers can actually be awarded the “Best Performance” title, once more highlighting the outstanding characteristics of Jolywood modules.
Deepening then N-type technology range by developing TOPCon technology
The nN-type technologyrange came out in 2021, impressing everyone with its high conversion efficiency. This led to a change in cell technology development, which has now beenlargely accepted by the wider industry. With nN-type solar cells becoming the focus of both industry experts and enterprises, Jolywood, as the global leader innN-type industrialization technology, is firmly developing TOPCon technology and continuing to lead the technological revolution.
President Zhao described how Shanxi Jolywood Solar Energy has adopted the new generation of patented J-TOPCon2.0 n-type high-efficiency solar cell technology and processes, a testament to the company’stechnical strengths and R&D capabilities. Within this product range, the 182-16BB ultra-high efficiency monocrystalline bifacial N-type TOPCon cell with a maximum laboratory-tested conversion efficiency of 26.7% has set a new record after only half a year, surpassing its original record of 26.1% announced in November 2022. This makes the product an industry leader for N-type TOPCon cells. “As the cell technology most expected to replace PERC as the next generation mainstream specification, TOPCon’s market share has gradually increased over the past two years and now represents more than 50% of N-type technologies. It is also the main target of many PV manufacturers’ production line upgrades. As the leader in n-type TOPCon technology, Jolywood will continue to expand and deepen its technology offering, continuously moving new concepts from the laboratory into mass production, and guidingfuture development trends for global PV technology.”
Continue launching total solutions to contribute to the healthy and stable development of China’s PV industry
When it comes to the future development prospects of PV cells and modules, Mr. Zhao pointed out that in recent years, enterprises in the industry have increased their investment in scientific and technological research and development, making continuous technological breakthroughs based on”cost reduction and efficiency enhancement”. After years of development, continuous accumulation and innovation, the cost of photovoltaic power generation has been significantly reduced, and the objective conditions for grid parity are already in place. The development of PV cells and modules such as large silicon wafers, PERC+ and bifacial technologies will effectively improve the power and power generation efficiency of modules, while the continuous improvement of tracking bracket applications, operations and maintenance capabilities will reduce the cost of PV power generation systems. Grid parity and technological advances will boost the healthy development of the PV cell industry.
President Zhao said that, “in the future, Jolywood will uphold its original aspirations, focus on technical pain points, respond to customer demands, investigate the market in depth, continue to launch total solutions for the PV industry, set up an integrated system, and form efficient synergies for the entire industry chain. Jolywood will contribute to the healthy andstable development of China’s photovoltaic industry, and make contributions to achieving the country’s peak carbon and carbon neutrality goals!”
Jolywood Solar has recently been granted a patent for 0BB technology, while the research and development of busbar-free cell technology is being rapidly advanced. At present, modules based on crystalline silicon cells account for more than 80% of the global PV module market. The substrate of crystalline silicon cells consists of silicon wafers, and conventional cells are printed with multiple thin grid lines, known as ‘fingers’ (the raw material for which is silver paste) to collect the current generated by the silicon wafers after being exposed to light. They are also printed with 2-5 busbars to collect the current. With rapid developments within the industry, the “cost reduction and efficiency enhancement” of crystalline silicon cells has put forward even higher requirements. The cost of silver paste is currently second only to silicon in terms of total cell cost, which can account for as much as 15-25%. The large surface area covered by the busbars and fingers becomes a major constraint for power generation. This is exactly the reason why the 0BB cell technology without busbars was born. Based on the conventional cell, this technology removes the busbars and retains only the fingers (the thin grid lines), thus greatly reducing the use of silver paste, increasing the effective light area of the cell and improving the power generation efficiency of the PV module. In 2022, Jolywood Solar determined the main pain point of the industry, foresaw the market value of busbar-free cells, and took the lead in the research and development of 0BB technology. The 0BB technology patent obtained by Jolywood Solar is for a new type of conductive adhesive layer, which is used to solve the welding problem faced in the production of busbar-free cells and thin cells.
In the process of series or parallel connection of photovoltaic cells into modules, it is necessary to weld the welding strip on the cells to ensure electrical conductivity. This is traditionally done by a process of high temperature infrared welding. However, this method is not suitable for the welding of thin cells without busbars, since the risk of cell bending and fragmentation will be greatly increased by the high temperatures. In view of this, we have been exploring low-temperature welding technology for photovoltaic cells, and successfully applied for a patent for a new type of conductive adhesive layer (Patent No. ZL202221014302.0). By using a low-temperature curing conductive adhesive (50℃~150℃), we are able to adhere the welding strip to the contact point of the cell in the lower temperature range, thus effectively reducing the proportion of bending, hidden cracks and broken cells. However, there still remains a difficult issue between the “incubation” of this special conductive adhesive material and the expected future mass production. How is this matter to be solved? The conductive adhesive of the special material is a fluid at room temperature, and after laying it on the cell and contacting the grid area, it needs to be heated for 5-10 minutes to cure, during which time the conductive adhesive tends to spread to the periphery of the cell, resulting in an inability to achieve precise welding between the tape and the grid area. In addition, this extra waiting time also prolongs the welding cycle of the cells and reduces their welding efficiency. In order to solve this issue, the whole team has been innovating and experimenting with the structure of the conductive bonding layer, and ultimately designed a new structure containing three different layers: the base material layer, the bonding layer and the conductive tape.
The bonding layer is bonded to the finger area of the cell to wraparound the conductive tape with the main grid area of the cell, while the substrate layer is laminated on the upper surface of the bonding layer. The existence of the bonding layer means the conductive tape and the busbar area between the metal ions no longer damage the cell structure, while the conductive connection does not need to wait for the conductive adhesive curing time. Instead, the next process can be directly implemented, thus improving the efficiency of the conductive connection. The substrate layer is set up to greatly facilitate the finished product after factory reel storage, by means of cutting through the welding machine, gripping of the jaws and servo positioning. In this way, a precise lap of the conductive tape of this conductive adhesive layer is achieved, as well the grid lines of the main grid area of the cell. The development of this new conductive adhesive layer not only represents a breakthrough in low-temperature welding, expected to solve the pain points of the traditional welding process for PV cells, but also will play an important role in reducing internal losses during the welding and encapsulation of cells, improving production yields and production efficiency. From a longer-term perspective, after the price of silicon drops to its lowest point, the compression of wafer production cost will become the key to PV cell cost reduction. This is especially significant for the industrialization of TOPCon, HJT and other high-efficiency cells.Reducing the use of silver paste and silicon wafer thinning will be the two main paths to reduce costs in the future. This breakthrough in patents shows that the key R&D processes for the 0BB products is advancing rapidly, which will better match the development needs of thin, busbar-free cells. At present, Jolywood is still updating its 0BB technology, implanting invisible tape and other advanced technologies, simplifying the technical process, promoting increased accuracy and reliability, and thus leading the industry to more precise production and boosting the development of the global PV industry.
