Key words diamond wire, photovoltaic|2019-10-18 09:49:50|Source China Superhard Materials Net
In this fast-changing world, the environment is changing, the industry is changing, and even ourselves are changing all the time. The whole world is full of changes and uncertainties. The same is true for the diamond wire saw-photovoltaic industry. In the face of various uncontrollable changes, diamond wire saws - how the photovoltaic industry embraces change, how to seize opportunities in change, meet challenges, and find new ways to develop.
What is the diamond line?
Diamond wire: also known as diamond tangential wire (diamond wire saw, diamond wire), through the electroplating process or resin bonding method, the diamond micronized particles are uniformly consolidated on a high-strength steel wire substrate with a certain distribution density. tool. In the same way, it is this electroplated thin wire that is almost as thick as the hair and has diamond micropowder on the surface, which promotes the rapid development of the photovoltaic industry.
Photovoltaic is hot, is it photovoltaic?
Photovoltaic: short for solar power system, a new type of power generation system that utilizes the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy, with independent operation and There are two ways to run on the grid.
Advantages of diamond wire saw
1. Diamond wire saw, the cutting time cutting benefit increased by 60% significantly improved the cutting time; save time, save water, save electricity, save labor.
2. The gap of the crystalline silicon material is reduced, the slice is increased by 8%-10%, and the waste becomes a wafer, and the efficiency is improved.
3. Environmental protection, reducing silicon carbide treatment in the latter stage and reducing costs.
Application of diamond wire saw in photovoltaic industry chain
The photovoltaic industry chain mainly includes five parts: silicon material, silicon wafer, crystalline silicon battery, photovoltaic module and photovoltaic power generation system. The upstream is the collection of silicon materials and the production of silicon wafers; the middle reaches are the production steps of crystalline silicon cells and photovoltaic modules; the downstream is the integration and operation of photovoltaic power generation systems. Among them, silicon wafer cutting is the main process of the slicing production process. The diamond wire can be used for silicon rod cutting, silicon ingot opening, silicon wafer cutting, and its cutting performance directly affects the quality of the silicon wafer and the photoelectric conversion performance of the photovoltaic module.
Schematic diagram of photovoltaic industry chain and diamond line application (Source: Public Information)
Review of the development of the photovoltaic industry in the past
As an emerging industry, photovoltaics has developed rapidly in recent years. According to HIS data statistics, in the initial stage of PV industry development (2002-2011), the global PV industry's compound annual growth rate is 53%. Among them, Chinese PV companies seized the European and American government's policy opportunities for subsidies to the photovoltaic industry, quickly seized the European and American markets, and formed a complete solar energy including high-purity silicon production, solar cell and component manufacturing, photovoltaic system installation and related supporting industries. The photovoltaic industry chain has laid a good foundation for the rapid development of the domestic photovoltaic industry.
In 2012, European and American countries' subsidies for the photovoltaic industry and the impact of the "double-reverse" in Europe and the United States, their compound growth rate, a sharp decline from the previous decade, only 23%. However, with the rise of China's photovoltaic industry and becoming the main force for the growth of the global photovoltaic industry, the global installed capacity of photovoltaic power generation still maintains a high level, from 27.32GW in 2011 to 94.56GW in 2017. In 2011, China's photovoltaic power generation installed capacity was 2.49GW, the world's share of the iceberg, less than 10%; in the past decade, China's photovoltaic industry developed rapidly, the new installed capacity in 2017 exceeded 50GW for the first time (high It reached 53.06GW), and the global share leap to 56%, becoming the largest PV installation country.
New installed capacity of photovoltaic power generation in the world from 2011 to 2017
Accumulated installed capacity of photovoltaic power generation in the world from 2011 to 2017
Development status of photovoltaic industry
At present, China has been listed in the world's largest PV application market, leading the global PV market. According to the statistics of the National Energy Administration and IHS, China's new installed capacity in 2017 was 53.06W, accounting for half of the world's new installed capacity of photovoltaic power generation, up to 56.11%; after the United States and India, they were 10.75GW respectively. 7.76GW. In addition, China is also a large producer of silicon wafers. From 2011 to 2017, China's wafer production has leapt from 2020GW to 87GW, accounting for 83% of the global total output. It has become the global silicon for meeting the global demand for more than 90% of new PV installed capacity. The main supplier of the film.
The proportion of new installed capacity of photovoltaic power generation in the world's top ten countries in 2017
China's wafer production from 2011 to 2017
Related policy analysis and interpretation:
(1) The development of China's photovoltaic industry is inseparable from policy support
As the main force of new energy, the photovoltaic industry is one of the key targets of national policy support. In recent years, more than 60% of the industrial support policies introduced by China have been related to solar photovoltaic power plants. China has built a photovoltaic power station and built the most downstream application system of photovoltaics to drive the upstream production capacity to achieve the goal of supporting the photovoltaic industry. With the inherent advantages of energy saving and environmental protection, the LED industry has become a powerful engine for launching the green lighting revolution. It is known as the “golden intersection of new light sources and new energy sources” and continues to be supported by the state and local governments at all levels. In the consumer electronics arena, the policy encourages the application of new materials such as sapphire, which has brought tremendous vitality to the industry's innovation and development.
related policy
In February 2012, the “Twelfth Five-Year Development Plan for Solar Photovoltaic Industry” promulgated by the Ministry of Industry and Information Technology clearly identified the key technologies of the new section of Jinang Line in solar silicon processing as the focus of development;
In June 2015, the National Energy Administration, the Ministry of Industry and Information Technology, and the National Certification and Accreditation Administration jointly promulgated the Opinions on Promoting the Application and Industrial Upgrading of Advanced Photovoltaic Technology Products ([2015] No. 194), and the development of diamond wire as a photovoltaic industry. The core of the important composition and new cutting technology is the national encouraged products.
(II) Opportunities and challenges in the photovoltaic industry
The "531 New Deal" of 2018 brings new challenges to the photovoltaic industry
After experiencing the development of light speed, China's photovoltaic industry has reached the peak of capacity and installed capacity. In 2017, the newly added photovoltaic installed capacity reached an unprecedented 53GW. The direct consequence of this situation is the continuous expansion of the subsidy gap. In order to avoid the disorderly development of the industry, the National Development and Reform Commission, the Ministry of Finance, and the National Energy Administration jointly issued the "Notice on Matters Related to Photovoltaic Power Generation in 2018" (referred to as the "531" New Deal). As of now, the New Deal has been implemented for more than a year. The PV industry has a significant impact.
This has led to a significant reduction in new PV capacity and a direct impact on the demand for PV modules. Since the second half of 2018, supply chain prices have fallen sharply, from silicon materials, silicon wafers to battery chips, components, and supply chain. The development of China's diamond wire saw market has also entered a period of shock. For example, the demand for diamond wire saws has declined, the industry's business climate has fallen, and diamond wire prices have fallen from 150-180 yuan/km to 100-120 yuan/km.
Due to the reduction in domestic market demand and lower product prices, photovoltaic manufacturing companies have also been greatly affected. In the "531" New Deal round of reshuffle, the proportion of large enterprises with technology and scale advantages has further expanded, while enterprises with insignificant advantages, especially small and medium-sized enterprises, are facing tremendous pressure to survive.
2019 is a year in which the photovoltaic industry has been inherited. How can the photovoltaic industry seize new opportunities?
2019 is a crucial year for the photovoltaic industry. The photovoltaic policy has been continuously introduced, highlighting the characteristics of “playing the decisive role of the market in resource allocation” and “striving for progress”, aiming to further improve the competitive allocation and build photovoltaic A new model for the sustainable development of industrial health.
related policy
On January 7, the National Development and Reform Commission and the National Energy Administration jointly issued the "Notice on Actively Promoting the Work of Unfunded Affordable Internet Access for Wind Power and Photovoltaic Power Generation" (Development and Reform Energy [2019] No. 19), proposing to launch affordable Internet projects and low-cost Internet access. Pilot project construction
On April 30, the National Development and Reform Commission issued the "Notice on Improving the Relevant Issues Concerning the On-grid Price Mechanism of Photovoltaic Power Generation" (Development and Reform Price [2019] No. 761), and determined the PV price standard for 2019.
On May 7th, the National Energy Administration issued the “Special Work Plan for Clean Energy Dissipation Key Regulations” (Guo Neng Ji Tong Tong Supervision [2019] No. 38), proposing to further promote the optimization of clean energy grid-connected services to ensure fairness, non-discrimination and efficiency. Access to the grid
On May 17, the National Development and Reform Commission and the National Energy Administration issued the "Notice on Establishing and Improving the Safeguard Mechanism for Renewable Energy Power Consumption" (Development and Reform Energy [2019] No. 807), and delineated 13 policy measures to promote Establish a renewable energy power consumption guarantee mechanism
On May 22, the National Energy Administration and the National Development and Reform Commission issued the "Notice on Promulgating the First Batch of Wind Power and Photovoltaic Level Price Internet Projects in 2019" (Development and Reform Office Energy [2019] No. 594), showing 16 provincial levels in the country. The competent energy department submitted a list of wind and light parity Internet projects, of which the installed capacity of PV affordable Internet projects was 14.78GW.
On May 31, the National Energy Administration issued the Notice on the Relevant Matters Concerning the Construction of Wind Power and Photovoltaic Power Generation Projects in 2019 (Guo Neng Fa Xinneng [2019] No. 49), the annex to which is the work plan for the construction of photovoltaic power generation projects in 2019. ", reflects the ideas and actions of the state reform photovoltaic power generation management mechanism
Diamond wire saw - photovoltaic industry development prospects
From a global perspective, the transformation of the world's energy structure into a diversified, clean, and low-carbon direction is an irreversible trend, and governments are still actively encouraging the development of the solar photovoltaic industry.
Especially before the National Day holiday this year, it cost 80 billion yuan, and Beijing Daxing International Airport, with an annual passenger flow of 100 million passengers, is open to welcome guests. This is the airport with the highest proportion of renewable energy in the country, and is known as the “Green New Country Gate”. In the future, more “photovoltaic + transportation” projects will be put on the line, and photovoltaic power generation will be accompanied by more practical application modes, which will be closer to people's daily lives.
In this industry background, the solar photovoltaic industry still faces better development opportunities and will maintain a relatively fast growth trend in the future, which also provides a good social environment and broad market space for the diamond wire saw industry.
Diamond wire saws have also begun to focus on diversified layouts, mainly in the field of sapphire and crystalline silicon cutting. Innovation is still the key to the diamond wire saw industry. With the continuous development of the manufacturing industry and the emergence of new materials, the application range of diamond wire saws continues to expand, such as in the field of raw material cutting in industries such as consumer electronics, LED lighting, and new energy vehicles. . However, the application in these fields is relatively small. After the shock of the photovoltaic industry, the diamond wire saw industry has begun to pay attention to the diversified layout, which is conducive to avoiding the market of a single industry.
Based on this, DT new materials and China Superhard Materials Network will hold the 4th International Carbon Materials Conference Diamond Forum on November 26-29. Focus on the development and future of diamond wire cutting and photovoltaic industry, from raw and auxiliary materials to process optimization, in-depth discussion of diamond wire saw processing of single crystal silicon and polysilicon technology, as well as the development of diamond wire cutting technology and in photovoltaic, gem processing, magnetic Applications in materials, precision ceramics, etc., more roundtable discussions, rich in content, and diverse in form, waiting for you to participate!
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Henry Wang | Quote Manager
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