Eging PV
EGing PhotovoltaicTechnology Co.,Ltd. - The first company to manufacture Chinese photovoltaic module has its wholly-OWNED - Changzhou EGing Photovoltaic Technology Co., Ltd., created 2003, is a high-tech company, specializes in R&D, the design and marketing of photovoltaic products.
With the vertically integrated value chain, including circulation ingot, slicing the wafer, manufacturing cell, the assembly module and the application system, the company has a capacity of 1000MW annual production of monocrystalline and polycrystalline Module. EGing obtained the certifications of these products and management, together with ISO9001、ISO14001，OHSAS18001 and QC080000. The products are certified by agencies as test leader GSC、TUV、IEC、EC、VDE、MCS and UL. EGing PV products are sold worldwide.
[spoiler title=”Vertical integration process” open=”false” closebtn=”Close”]
[/spoiler]
[spoiler title=”Sillicium” open=”false” closebtn=”Close”]
After oxygen, the silicon is the second most common element in the earth's crust, but it is rarely encountered in a pure form. Silicon occurs most often as sand, ie in combination with oxygen as oxide. For the manufacture of solar cells, this sand must first be reduced by oxygen. The raw silicon obtained must be purified through another process to give a pure silicon metallurgically. This treatment is done for example using the Siemens process.
The metallurgically pure silicon consists of a multitude of individual crystals. This is called polysilicon. The development of monocrystalline silicon is another step to control the purity metallurgical silicon as foreign substances are released during crystallization. It is thus possible to optimize the electrical properties and other physical characteristics of the crystal lattice. To this end, a ultra pure crystal SILICIUM is dipped as a seed, crystallization of silicon into a crucible whose temperature is near the melting point. The initial crystal cools the material with which it comes into contact and enriched according to its crystal lattice.
This is the way forms a single crystal Seoul gros from polysilicon. The English term "ingot" which means ingot is often used in the photovoltaic industry to describe silicon ingots monocrystalline or polycrystalline.
[/spoiler]
[spoiler title=”Wafer” open=”false” closebtn=”Close”]
After the production of the silicon ingot or " ingot », it is sliced. Since monocrystalline ingots have a circular section due to their development, cut slices resemble circular plates - in English "wafer". Cutting of the ingots is carried out by a method of sawing multiple son. Son on are arranged along the length of the ingot, which allows to obtain a plurality of wafers in a single pass. The technical development done in recent years has reduced the thickness of the wafers 300 μm with 200 μm. The trend is towards a further reduction of the thickness of the wafer and the thickness of the saw cut in order to save material.
The objective is the other one to get a cutting surface if possible homogeneous. Immediately after cutting, wafers spend in different baths to remove dust from sawing and cutting residues son. The wafers are then cleaned and subjected to a mechanical control. This is to achieve a high homogeneity if possible thickness and quality wafers qu'EGing cooperates very closely with leading manufacturers in the production of wafers.
[/spoiler]
[spoiler title=”Solar cells” open=”false” closebtn=”Close”]
A solar cell which is an electrical component, on the basis of the effect photoelectric, converts the sunlight directly into electric energy. The basis of a solar cell is a wafer which is converted into a solar cell by a succession of chemical and mechanical processes. Chez possible, the production of solar cells comprises the automated manufacturing process as a whole, with the cleaning of wafers, dopant diffusion through the process PECVD (Plasma-enhanced chemical vapor deposition), the discharge printing grids silkscreen contact from silver paste and thermal sintering.
EGing product cells both 125 mm cells as 156 mm. En appliquant un management de qualité strict tout au long de la production des cellules, they reach higher yields industry standards : each cell manufactured and converted by EGing is subjected to several tests Visual, mechanical and electrical which is added a flash test for performance measurement. Cells that have passed the quality tests successfully are sorted according to their measured power.
[/spoiler]
[spoiler title=”Solar modules” open=”false” closebtn=”Close”]
EGing product modules of different sizes and configurations according to customer requirements. By working closely with leading equipment manufacturers, EGing set on qualified staff and the benefits of a production largely mechanized and automated with the benefits it provides to the quality plan and costs. EGing the solar modules consist of a glass plate low reflectance, a layer of transparent synthetic material, in this case the‘EVA (ethylene vinyl acetate), that encapsulates the solar cells themselves electrically connected together by small bands and a liner on the back face composite sheet TPT (tedlar-polyester-tedlar).
This laminate is surrounded by a Profit en aluminum frames whose function is to protect the glass pane during transport, handling and assembly and stiffen the assembly to protect against the wind loads and snow. Each module has a junction box (Junctionbox) with cables and connectors for connection. The solar cell module are assembled according to their measured power in the preliminary screening performed. This ensures that the module is adapted precisely to the required criteria. All the brazing operations are carried out by an automatic soldering. The sandwich is subjected to a visual inspection before stratification. After the first pre-stratification, each laminate is subjected to a test electroluminescence and the stratification process is completed. Then come the assembly operations of the aluminum frame and junction box. The solar module is then subjected to a power test (test flash). The measured power is documented with the serial number of the module. Finally, The modules are packed on pallets resistant to torsion.
[/spoiler]
[spoiler title=”Installations” open=”false” closebtn=”Close”]
Depending on the size and type of installation, individual solar modules connected in series are assembled into chains called strings. Here, the tension of the various modules are added. If appropriate, several of these strings are connected in parallel. A parallel connection of different modules is mainly fashion island assisted by batteries.
The solar modules are usually mounted on a substructure which, in the ideal case, directs modules to ensure maximum energy intake or if possible constant throughout the year. The substructure can also follow the sun's movement to achieve higher energy efficiency. If it is connected to a network installation, an inverter will convert the direct current generated in the(s) module(s) Solar(s) alternating current and feed it into the network. Excluding losses due to conversion, This is usually done in a comprehensive manner as long as the network is available in sufficient quality (voltage / frequency).
[/spoiler]
