Application prospect of diamond cutting line technology in photovoltaic market
2024-01-24 08:08:25
Foreword: Diamond cutting line is mainly used for cutting hard and brittle materials at this stage. Customers are concentrated in photovoltaic silicon materials and sapphire industry with high concentration. Silicon wafers are mainly used in the solar photovoltaic industry, while sapphire is mainly used in the LED lighting and consumer electronics industries. Let us first look at the development of diamond wire cutting. 
At present, about 80% of domestic diamond cutting lines enter the photovoltaic industry through downstream silicon wafer manufacturers. Especially after the technical barriers are removed, the premium capacity of diamond cutting silicon wafers is improved, which is the core of industry demand elasticity. China is the world's number one producer of solar wafers. The development of the photovoltaic industry has maintained a good momentum. The new installed capacity will directly affect the operating conditions of the industry. The picture below shows the application in the photovoltaic industry chain. 
The downstream applications of the diamond wire are mainly photovoltaic wafer cutting and sapphire cutting, in which the wafer cutting in the photovoltaic field accounts for 99%. According to the statistics of the photovoltaic industry association, the penetration rate of the diamond wire in the single crystal silicon in 2017 has reached 100%. The penetration rate of polysilicon is 35%. The future growth of diamond wire in the photovoltaic field mainly comes from three aspects: the increase of new installed capacity in the photovoltaic market The global PV market is growing strongly, and China accounts for half of the country. In 2017, the installed capacity of the global PV market reached 102GW, an increase of over 37% year-on-year, and the cumulative PV capacity reached 405GW. In 2017, the scale of new PV power plants in China was 52.83GW, a year-on-year increase of more than 53.6%. Among them, the installed capacity of new distributed PV power plants has exceeded 19GW, which is more than 360% year-on-year. The total installed capacity of distributed PVs in the past five years is increasing in installed capacity. The proportion is over 36%. The global market will continue to grow in 2018, and the Chinese market will still maintain a certain market volume. Benefiting from the continuous decline in investment costs, power generation continues to increase, and PV parity is not far off. From the perspective of investment cost, the component price can be reduced from the current 2.7 yuan / watt to 2 - 2.2 yuan / watt; system investment costs can be reduced from 6 yuan / watt to 5 yuan / watt. In terms of power generation, equipment performance improvement (such as increased component inverter life, double-sided components), power plant design level (including capacity ratio design, adjustable bracket use), as well as improved operation and maintenance levels, greatly improved System power generation level. The increase in photovoltaic grid connection will stimulate demand for installation. According to the forecast of China Photovoltaic Industry Association, the global market will continue to grow in 2018. In the optimistic situation, the newly installed capacity is about 105GW, and in the conservative case, 90GW is added. The Chinese market will still maintain a certain market volume in 2018. Under optimistic circumstances, it is estimated that the newly installed capacity will be 45GW, and 30GW will be added under conservative circumstances. Among them, distributed PV will become the focus of future development, and the market segments such as poverty alleviation and household use are positive. Accelerate the rise. Monocrystalline silicon in the silicon wafer market, according to CPIA data, monocrystalline silicon in the silicon market in 2017, the market share of 31%, diamond wire cut to 100%, so monocrystalline silicon wafer The future development of the line mainly comes from the increase in the market share of monocrystalline silicon in silicon wafers. According to the data of China's Photovoltaic Industry Development Roadmap (2017 edition), the market share of monocrystalline silicon will reach 46% by 2020, and the market share will exceed 50% by 2025. At present, the cost gap of single crystal polycrystals has narrowed, and there is still room for reduction in single crystals. According to the latest data, the average spot price of polycrystalline silicon wafers (156mm × 156mm) is 0.6 US dollars per piece, and the average weekly price of monocrystalline silicon wafers (156mm × 156mm) is 0.69 US dollars per piece. The gap between the two is shrinking. In terms of efficiency, the conversion efficiency of single crystal silicon cells and the power generation efficiency of single crystal silicon power plants are both higher. The conversion efficiency of single crystal silicon cells reached 21.3% in 2017, and the highest conversion efficiency of P-PERC continued to break. The highest conversion efficiency of Jingke reached 23.45%, and Longji reached 22.7%. In contrast, the conversion efficiency higher than polysilicon is 19.2%. 
The diamond permeability of the diamond wire is increasing. Currently, polysilicon has a high market share in the wafer market, but most of them are still mortar wire cutting, and the penetration rate of diamond wire cutting is low. According to CPIA data, polysilicon's market share in the silicon wafer market reached 69% in 2017, and the diamond wire cut ratio accounted for only 35%. Before 2015, there were two major difficulties in diamond-cutting polysilicon: 1) Ingot crystal The hard spots existing in the process may cause wire breakage during the cutting process; as the polysilicon ingot impurity control technology is improved, the wire breakage problem can be solved, and the black silicon technology + diamond wire cutting technology solves the suede problem of the silicon wafer, It can improve battery conversion efficiency and reduce battery cost. Compared with the previous sand cutting, the production efficiency of the diamond wire cutting polycrystalline machine is increased by more than 50%, the unit silicon consumption is reduced by more than 20%, and the vertical manufacturing cost can be reduced by more than 26%. This is the most important cost reduction measure in recent years. 2) The damage layer is shallow, and it is difficult to prepare the anti-reflection suede by the current acid wet-fabrication technique, and the surface reflectance of the silicon wafer is relatively high. In the future, PERC batteries will become the mainstream. "PERC (passivated emitter back contact) process + black silicon process + diamond wire cut polycrystal" is the only way to continue to improve the efficiency of polycrystalline. By comparing the conversion efficiencies of various crystalline silicon cells, it can be found that the conversion efficiency of monocrystalline silicon cells is generally higher than that of polysilicon. The conversion efficiency of PERC cells is generally higher than that of BSF cells, and the comprehensive application of PERC process + black silicon process + diamond wire cutting polycrystal. , has increased the mass production efficiency of polycrystalline batteries to more than 20.5%. At this stage, the market is still dominated by BSF batteries. According to CPIA data, the market share of PERC batteries will exceed 50% in 2019. The popularity of PERC will gradually push the mortar line out of the polysilicon cutting market. “PERC Process + Black Silicon Process + The diamond wire cut polycrystal is the only way for the new generation of high-efficiency polycrystals to continue to progress. 
At present, about 80% of domestic diamond cutting lines enter the photovoltaic industry through downstream silicon wafer manufacturers. Especially after the technical barriers are removed, the premium capacity of diamond cutting silicon wafers is improved, which is the core of industry demand elasticity. China is the world's number one producer of solar wafers. The development of the photovoltaic industry has maintained a good momentum. The new installed capacity will directly affect the operating conditions of the industry. The picture below shows the application in the photovoltaic industry chain. The downstream applications of the diamond wire are mainly photovoltaic wafer cutting and sapphire cutting, in which the wafer cutting in the photovoltaic field accounts for 99%. According to the statistics of the photovoltaic industry association, the penetration rate of the diamond wire in the single crystal silicon in 2017 has reached 100%. The penetration rate of polysilicon is 35%. The future growth of diamond wire in the photovoltaic field mainly comes from three aspects: the increase of new installed capacity in the photovoltaic market The global PV market is growing strongly, and China accounts for half of the country. In 2017, the installed capacity of the global PV market reached 102GW, an increase of over 37% year-on-year, and the cumulative PV capacity reached 405GW. In 2017, the scale of new PV power plants in China was 52.83GW, a year-on-year increase of more than 53.6%. Among them, the installed capacity of new distributed PV power plants has exceeded 19GW, which is more than 360% year-on-year. The total installed capacity of distributed PVs in the past five years is increasing in installed capacity. The proportion is over 36%. The global market will continue to grow in 2018, and the Chinese market will still maintain a certain market volume. Benefiting from the continuous decline in investment costs, power generation continues to increase, and PV parity is not far off. From the perspective of investment cost, the component price can be reduced from the current 2.7 yuan / watt to 2 - 2.2 yuan / watt; system investment costs can be reduced from 6 yuan / watt to 5 yuan / watt. In terms of power generation, equipment performance improvement (such as increased component inverter life, double-sided components), power plant design level (including capacity ratio design, adjustable bracket use), as well as improved operation and maintenance levels, greatly improved System power generation level. The increase in photovoltaic grid connection will stimulate demand for installation. According to the forecast of China Photovoltaic Industry Association, the global market will continue to grow in 2018. In the optimistic situation, the newly installed capacity is about 105GW, and in the conservative case, 90GW is added. The Chinese market will still maintain a certain market volume in 2018. Under optimistic circumstances, it is estimated that the newly installed capacity will be 45GW, and 30GW will be added under conservative circumstances. Among them, distributed PV will become the focus of future development, and the market segments such as poverty alleviation and household use are positive. Accelerate the rise. Monocrystalline silicon in the silicon wafer market, according to CPIA data, monocrystalline silicon in the silicon market in 2017, the market share of 31%, diamond wire cut to 100%, so monocrystalline silicon wafer The future development of the line mainly comes from the increase in the market share of monocrystalline silicon in silicon wafers. According to the data of China's Photovoltaic Industry Development Roadmap (2017 edition), the market share of monocrystalline silicon will reach 46% by 2020, and the market share will exceed 50% by 2025. At present, the cost gap of single crystal polycrystals has narrowed, and there is still room for reduction in single crystals. According to the latest data, the average spot price of polycrystalline silicon wafers (156mm × 156mm) is 0.6 US dollars per piece, and the average weekly price of monocrystalline silicon wafers (156mm × 156mm) is 0.69 US dollars per piece. The gap between the two is shrinking. In terms of efficiency, the conversion efficiency of single crystal silicon cells and the power generation efficiency of single crystal silicon power plants are both higher. The conversion efficiency of single crystal silicon cells reached 21.3% in 2017, and the highest conversion efficiency of P-PERC continued to break. The highest conversion efficiency of Jingke reached 23.45%, and Longji reached 22.7%. In contrast, the conversion efficiency higher than polysilicon is 19.2%. The diamond permeability of the diamond wire is increasing. Currently, polysilicon has a high market share in the wafer market, but most of them are still mortar wire cutting, and the penetration rate of diamond wire cutting is low. According to CPIA data, polysilicon's market share in the silicon wafer market reached 69% in 2017, and the diamond wire cut ratio accounted for only 35%. Before 2015, there were two major difficulties in diamond-cutting polysilicon: 1) Ingot crystal The hard spots existing in the process may cause wire breakage during the cutting process; as the polysilicon ingot impurity control technology is improved, the wire breakage problem can be solved, and the black silicon technology + diamond wire cutting technology solves the suede problem of the silicon wafer, It can improve battery conversion efficiency and reduce battery cost. Compared with the previous sand cutting, the production efficiency of the diamond wire cutting polycrystalline machine is increased by more than 50%, the unit silicon consumption is reduced by more than 20%, and the vertical manufacturing cost can be reduced by more than 26%. This is the most important cost reduction measure in recent years. 2) The damage layer is shallow, and it is difficult to prepare the anti-reflection suede by the current acid wet-fabrication technique, and the surface reflectance of the silicon wafer is relatively high. In the future, PERC batteries will become the mainstream. "PERC (passivated emitter back contact) process + black silicon process + diamond wire cut polycrystal" is the only way to continue to improve the efficiency of polycrystalline. By comparing the conversion efficiencies of various crystalline silicon cells, it can be found that the conversion efficiency of monocrystalline silicon cells is generally higher than that of polysilicon. The conversion efficiency of PERC cells is generally higher than that of BSF cells, and the comprehensive application of PERC process + black silicon process + diamond wire cutting polycrystal. , has increased the mass production efficiency of polycrystalline batteries to more than 20.5%. At this stage, the market is still dominated by BSF batteries. According to CPIA data, the market share of PERC batteries will exceed 50% in 2019. The popularity of PERC will gradually push the mortar line out of the polysilicon cutting market. “PERC Process + Black Silicon Process + The diamond wire cut polycrystal is the only way for the new generation of high-efficiency polycrystals to continue to progress. Pozi Drive Double CSK Head Screw
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