The first choice for improving the price/performance ratio of polycrystalline products is the application of diamond wire slicing technology. The diamond wire slice is increased by nearly 20% per kilogram of film, and the diamond wire slice can reduce the cost of silicon wafer by more than 20%. There are three main techniques for the application of polycrystalline diamond wire wafers at the battery end. One is the use of additives to directly produce an improved textured surface on existing texturing equipment. Although the efficiency has not improved, the cost of cutting silicon wafers has made this simple technology widely used. The second is the industrial application of wet black silicon technology. There are already mature wet black silicon devices, processes and materials available on the market. This year will be a year of large-scale application of wet black silicon. The equipment of wet black silicon is currently 300-400 million yuan, and the processing cost per piece can be less than 0.10 yuan. GCL-Poly has independently developed a complete set of wet black silicon technology and introduced the TS series of black silicon wafer products. GCL-Poly is willing to provide customers with free wet black silicon technology to help customers industrialize the application of stable wet black silicon technology. Another black silicon technology, dry black silicon is also being tested in many battery factories. It is believed that the battery conversion efficiency can be fully improved in the high-efficiency battery process.
Improving the conversion efficiency of polycrystalline silicon wafers is the most effective way to improve its cost performance. I think the ultimate goal of ingot technology development is single crystal. Ingot single crystal or so-called single crystal was not very successful in marketing 5 or 6 years ago. The main reason was that the technology at that time was immature, the ratio of single crystal of the product was low, and the density of dislocations was high. The efficient polycrystalline extrusion of the market. Ingot casting single crystal is the best way to improve the efficiency of ingot casting technology. GCL-Poly has made remarkable progress in this field recently, and its technical indicators have been greatly improved. Coupled with the current positive effect of diamond wire slicing technology and wet black silicon technology on ingot single crystals, we expect that the efficiency of a single crystal (or can be called super polycrystal) is no more than 0.5% worse than that of a straight single crystal. The cost of silicon wafers will be at least 0.50 yuan lower than that of single crystals.
PERC batteries require higher quality polysilicon wafers, which are not only reflected in efficiency, but also need to inhibit photoinduced attenuation. The co-doping technology developed by GCL-Poly and the corresponding silicon wafers are the first choice for PERC polycrystalline technology. While diamond wire cutting + wet black silicon + PERC will increase the cost by 0.2 yuan / piece, but because the efficiency rate increased by more than 1.3%, its gain of 0.7 yuan / piece, cost-effective increase of 0.1-0.2 yuan / watt. PERP wafer quality targets are higher efficiency gains (>1.0%) and narrower efficiency distributions (0.4% to 0.5%). The application of polycrystalline silicon wafers in PERC battery technology has a lot of room for improvement. The efficiency of Trina Solar P-type polycrystalline cells has reached 21.25%; the production efficiency of PCC Energy PERC+Black Silicon has reached 20.5%; Fraunhofer N-type polycrystalline cell efficiency It reached 21.9%. "
The new technologies that GCL-Poly hopes to develop, including wet black silicon and ingot single crystals, can promote the healthy and rapid development of the entire industry in the polycrystalline field, which will further upgrade the ingot technology and renew its vitality.
Sealand is a trustworthy supplier of Mass Flow Transmitter, Mass Flow Sensor, Mass Flow Metre, Coriolis Metre, ATEX, IECEx & CE approved.
Sealand Mass flow meter measures the mass based on Coriolis effort. The operating principle involves inducing a vibration of the tube through which the fluid passes. The vibration, though not completely circular, provides the rotating reference frame that gives rise to the Coriolis effect. While specific methods vary according to the design of the flow meter, sensors monitor and analyze changes in frequency, phase shift & amplitude of the vibrating flow tubes. The changes observed represent the mass flow rate and density of the fluid.
Features
â— Measurement is not influenced by flow density, viscosity, temperature & pressure;
â— Low requirement of straight pipe, because nothing inside holds back the flow;
â— Low power dissipation; stable zero point; better accuracy;
â— Meter is ARM system with 3 calculators to count density, temperature & mass flow rate;
â— Transmitter is assembled by surface mounting technology with self-inspection function;
â— ATEX approved(excluding Transmitter F210). Cert. No. TPS 18 ATEX 04516 001 X
Mass Flow Transmitter, Mass Flow Sensor, Mass Flow Metre, Coriolis Metre
Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com