DBM Video: What's with the ACM, all-in-one conductive backplane? Longji Green Energy "Technology Forest" Appears

Mr. Qian, Longji has released a brand new ACM technology this time. Compared with the mainstream silver-free solutions of its peers, what is the difference at the bottom? Where is the main core breakthrough? People think more of copper, which is covered with silver and covered with a layer of silver, but the disadvantage of this is that when it is sintered at high temperature, the layer of silver it covers is easy to break.

The second technical route is called copper electroplating, which is to use the electroplating process to deposit a layer of copper naturally in the electrolyte. The advantage of this is that it will deposit a higher density, more reliable, and can also be made very narrow. But its problem is that the cost is very high, which is equivalent to adding a long production line later.

The third one is called copper paste. Copper paste is https://www.databm. with

The fourth technical route is called aluminum, which is replaced by aluminum. But the resistivity of aluminum is much higher than that of them, so the aluminum grid line has to be made very wide, which affects the double-sided rate and shading. Therefore, these four technical routes have their own advantages and disadvantages.

Then our technology, under the third technical route, has come out of a new branch. How? Outside it, we wrap it into a layer of polymer materials, nanoscale polymer materials, to isolate it from the air and avoid the problem of its combination with oxygen.

At the same time, you have to prevent copper and metal atoms from https://www.databm., so this is what we call ACM technology, nano-alloy matrix contact technology. This is where we are different from other industries.

Its advantage is that it is completely compatible with our existing production line, and it does not need to do too much transformation. It is good to change the material directly, and it has been mass-produced. Now we only distribute in China, and we have sold hundreds of megawatts of goods. Will

this be rolled out comprehensively in other production lines? In the future, we think that with some of our established plans and the reaction of the market to this product, we will adjust it at any time. Because its transformation cycle and cost are not very high, so we need to be very fast. Compared with other silver-free schemes, it may be more popular. You see, for example, you have to do the electroplating process, you have to do the electrolytic cell, you have to do the electroplating equipment, waste liquid treatment and so on, which do not exist for us, but are exactly the same as the original screen printing process. What does

this technology mean for the industry? The second is that under the circumstances that it is already very difficult to improve the efficiency of the whole industry, we have further improved our power through the innovation of metallized materials. The third is that the original grid line is getting thinner and thinner. Now that we use new materials, we can make it wider, so that our reliability can be further improved. For the industry, the cost has not increased too much, so that people can use better, more reliable and more efficient products. It may be said that the cost reduction in the future will gain a great advantage.

In the short term, it will not reduce costs, but mainly improve efficiency. Why not cost reduction? Let me give you an example. For example, the chip used in our mobile phone has been used from seven nanometers to three nanometers, right? The area of the silicon wafer it occupies will be smaller, but will its cost be reduced? So in the initial stage, what it reflects most is not cost reduction, but more efficient and reliable products for the industry.

So do you think the cost will definitely be reduced in the future? Do you think it will be equal to other conventional products in a few years? Two or three years later, after the entire production line is rolled out in the future, for example, after the cost of your research and development has been amortized, it may show greater advantages.

Does it belong to the industrial chain and has high requirements for other equipment enterprises? You see, our technology is completely developed by us independently and collaboratively. The most important thing is the formula, and the material requirements are relatively high.

This time we have ACM technology, and we have also seen the integrated backplane, which is also a very shocking brand new product. Yes, this is an underlying technological innovation. Because in the past twenty or thirty years, the entire

So we thought about how to get rid of the welding strip. And in a component, the solder joint between the solder strip and the sub-grid is a component 2. So our researchers developed such an integrated conductive backplane, and directly made the backplane conductive, thus killing the solder strip. This battery is stacked on top one by one, so that its reliability can be further improved and its conductivity can be better. Because when you restore this film to this cylindrical solder strip, its conductive cross-sectional area increases by 85%, so its resistance is further reduced, and its efficiency can be further improved.

In addition, this integrated metal backplane has a part of long-wave light, which shines under the silicon wafer and reflects back. It can also increase the absorption of long-wave light, and the efficiency is further improved. What kind of impact

do you think this technology will bring to the industry? First, I don't know if you know about the circuit board of the computer in the 1960s. It was not an integrated circuit board like it is now. It was connected one by one with thin wires. If you look at that computer, you will see a house of wires in a mess. Later, in the seventies and eighties, people invented the integrated circuit board. You can see that it was a clean circuit board, and all the functions were solved. So I think for the photovoltaic industry, it is an integrated circuit board.

The second technology is that Tesla has a big die-casting. In the past, the structure of a car body needed sixty or seventy parts, which were very complicated to weld. Then Tesla made an integrated die-casting, and now the millet car also uses this technology. You see, in the past, you used 400 meters of grid lines and more than 10,000 solder joints. Well, now you don't need them. An integrated backplane has been completely solved, which is very subversive. Therefore, it also brings great innovative technology to the industry from the bottom.

This time, from ACM to integrated backplane, including batteries to components, to energy storage to a lot of new technologies, with this matrix technology, what kind of concept do you think Longji wants to bring to the industry? We have introduced so many technologies this time, which stems from our persistence and research on technology in the past. The second is the concept of "technology forest" that we have launched. Every technology is a technology tree. In the future, I can piece together some new products among these technology trees. We have this kind of forest soil, we can also plant more seeds of science and technology, one day in the future, these seeds will grow a new towering tree, science and technology tree.

What we want to convey to this industry is that the competition in the industry is very fierce now. What can really help each of our enterprises break through this cycle is never price war, never involution, but technological innovation, subversive technological innovation. Then we also reviewed the development of China's photovoltaic industry in the past 20 years. We went from following to taking the lead in the end. In fact, we reviewed it and found out why China's photovoltaic industry has today's position in the global photovoltaic industry? Because we have broken through the double pull crystal, because of the polycrystalline to single crystal, because of the BC technology, because of the progress of TOPCon technology. And these technological breakthroughs are not a single enterprise, but the common progress of hundreds of enterprises in the whole ecological chain, which has made us what we are today. Therefore, we want to pass on the future through this activity today. We Chinese photovoltaic people need to work together and innovate collaboratively in order to achieve a better future and tomorrow for China's photovoltaic industry.

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