What should we pay attention to in the quality optimization of lithium battery ceramic diaphragm?

Concentric Intelligent Network Summit Forum-2018 China(International) Lithium Electricity and Electric Technology Development Summit Forum was held in Shanghai on April 20-21. Ougechenhongqi, Guangdong, gave a keynote speech on "Quality Optimization of Lithium Battery Ceramic Divisor".

The lithium electricity industry absorbs 100 billion yuan of gold, and Huangjinluopan points to where. Concentric Network Summit Forum-China(International) Lithium and Electric Technology Development Summit Forum was held in Shanghai on April 20-21. The conference was jointly hosted by the First Lithium Grid, He Li Exhibition and Concentric Network. In the same period, the China International Electric Vehicle and Repairing Technology Summit Forum was held. The forum invited more than 40 guests to speak and share. Representatives from more than 500 lithium battery industry companies from all over the country attended the forum. Ougechenhongqi, Guangdong, made a keynote speech on "Quality Optimization of Lithium Battery Ceramic Divisor".

Hello, everyone, it is a great honor to attend the BRICS Lithium Summit. Today's sharing is an optimization of some of our products in the process of making lithium batteries. The application of lithium batteries has now gone deep into many fields. The popularization and promotion of power batteries to be introduced today has reached 6.7 million units by 2017. New energy vehicles have recently fallen in state subsidies and then the country's planning requirements by 2020 are 2 million. We are a market. How this big cake is made is that everyone is increasing production and reducing costs, releasing large quantities, and having a quality approach to fine.

In the process of doing fine, the main big diaphragm is the passage of the electron flow, which plays a role in security. As a diaphragm, the security is to be coated with a coating layer. The more popular ones are ceramics and some PVDF., and some other coating, But no matter what kind of mature slurry, ceramic. We want to ensure that the holes in the diaphragm can not be damaged, there are shrinkage indicators, and the strength of the adhesion and binder after the coating can not fall off the powder, the powder drop is the failure of the coating, the coating during the process of aging does not operate, water storage flow. The strength of the limb structure is low, and there is no way to test it through the dark injury that occurs later. In the future, to improve the quality of the coating, one is to achieve the particle size of the coating in the process of coating. From 300 to 500 nanometers to 1.5 microns, we are now improving our physical ratio and energy ratio. The film is getting thinner and the coating is getting higher. If I don't control it, I put two Mio coatings on it. It's not a good dispersion. It's a thin layer. It's a long-term charge. When the temperature rises, the barrier is closed after it passes, and the stricter factory will check it. Under the same good slurry premise, how to apply later can achieve chemical properties, this aperture porosity can be guaranteed. At present, a large number of large-scale brand factories are still using imported diaphragm. This is also the case before. It means that the physical strength of the application in the past few years, localization has already invested a lot, and the output has come out. It is really necessary to do every electronics factory. And car manufacturers are relieved not a slogan. But to be precise quantitative control, the diaphragm is the most important.

There is a gap between this and the long-term reduction of charge and discharge in foreign countries, and there is still a gap between the research done by these institutions of higher learning and the study of microscopic and theoretical aspects of industrialization. In fact, as an equipment for many diaphragm plants in the past few years, there is a quantitative scale control, that is, there is a temperature difference in the air outlet of the single box of process temperature sealing mouth, the longitudinal accumulation value is 1 %, and all longitudinal cumulative values are also 1 % deviations. The dryness of this dry coating is 90 % consistent, because this is consistent, and there is also a quantification process, that is, the flow of water is consistent. There is also a non-deformation, one is the temperature, the operational nature does not deform it, and the other is the airway transmission of the basement membrane. Many of the outlets out of the wind are introduced into the periphery, and there is no way to touch it. This is unbalanced. All are large negative pressure in the work, producing a large Eddy current, Eddy current has a large air outlet error, produced a horizontal Eddy current, swing to the left and right sides, swing not around the air outlet, is now 20 cattle transport. Many traditional ones are 4 kilograms and 5 kilograms. In the process of transportation, the next one can not be measured, which means that this deformation is equivalent to that. In order to correct the diaphragm, the left and right sides swing into 50 cows and become two. The two edges of the two are 20 or 30 centimeters. The speed shift is increased by 5 times, and 5 times the tension is fluctuating. After the fluctuation, the aperture porosity is certainly smaller than the middle. This small size causes the resistance in the front of the battery pack to be inconsistent. If it is the edge of the edge stretch section of the junction, make it inside the cell. It's going to produce the same size of resistance in the battery, it's going to produce internal stress, it's going to produce a resistance, it's going to be easy to produce lithium, we do some analysis in the college, there's some research in the later stages, there's a report in the early stages, the United States and Shenzhen do an experiment. During the operation of the electron flow, there will be an impact when hitting the positive and negative poles. When the impact is long, there will be endurance. Once the endurance force is generated, the funds will be generated. Once the funds are generated, the diaphragm will be punctured, which will short-circuit. If the particle size is good enough, The coating will not appear aging, that will appear closed holes, superimposed together will appear safety hazards. One is a boom produced when a large discharge is discharged. It is not bad adhesion and will produce a fall off. One is the wind speed and one temperature, these two are precise indicators, and the other is that it is a traditional exhaust fan that is arranged from the bottom and has two rows, and the humidity is inconsistent, which will affect the same volatilization. In the wind between the two wind speeds, that such a point is called point-to-point, exhaust exhaust exhaust, it will not produce Eddy currents will not float horizontally, will form more than 10 cattle operation, open up to 678 meters. The effectiveness is not to say 100 meters or 120 meters to foreign enterprises, but to ensure high speed and high efficiency under the premise of operating within 60 degrees Celsius, and we can now achieve a number of well-known diaphragm plants can already achieve 78 to 10 meters. These are the hard flaws that we have eliminated, and now we're looking at this problem, and this day is all about pulling apart, whether it's the positive and negative poles, including the diaphragm, the coating, the equipment, which is the key, in the process of controlling companies that are learning from Europe and the United States. Many of the products that companies do well are process control. We just introduced our equipment, including sharing, or focusing on process control, precise process control. There is also the need to eliminate the diaphragm, the dominant tangent of the diaphragm, and the leakage of coating during the coating process. This is just mentioned. The tradition is to walk from the wind on both sides, or from the bottom. These are the effects of drying. There are three elements of drying. To make a diaphragm dominant defect, one is that the thickness difference of the coating is too large, more than 0.5 meters, and the other is the reduction after the coating is completed. The reduction of the one-dimensional or high-azimuth inside will also result in a defect of the line. The time spent in drying is inconsistent. The deviation of the desiccation binder inside will affect the quality of the follow-up. There is also a process of reduction. When many manufacturers shrink up, a base is generated, and the tension of the cutting knife is cut down. After a period of time, There are 30 to 50 waste products in it. Ogg does not have this base.

Ogg said that PVDF sprayed a layer of different combinations of 15 %, 20 %, 30 %, and 35 % of different manufacturers to enhance antioxidants. This is already in use. Ogg entered the diaphragm professional coating began in 2012, we did the earliest in 2012, and there are other, it is not convenient to say here, there are more private enterprises, it is very careful to sweat money, we rely on technology before 2006 to do optical film coating machine, The circuit board techniques are then applied to the diaphragm coating.

And then we borrowed the new material batteries, and we were using the coating, and we wanted a lot of technology in the customer, an expansion, a deformation, and a flow of water, and this coating now we can do zero flow. And the membrane surface is not static electricity has not been made, dry is very knowledgeable, we do this introduced to suppress the drying, suppress what? The difficulty in coating the layer is that what the traditional drying must be is that it is easy to have safety hazards, high amount of coating, high viscosity, and amount of coating. This is a problem to volatilize, because it will produce a dry surface. After baking, The second is to suppress the exhaust, not the temperature, not the length, and after strong convection, when the surface is convective, it will produce a dry surface and be closed at low temperatures. After closing, the grinding surface will produce sand patterns. The flow under the surface is too much and it is already unqualified. It is necessary to withstand the grinding surface, including the two feng shui surfaces, with a pressure difference sensor. My display is positive 5PA and negative 5PA. Until it kills the formation of unsaturated, the formation of general grinding surface will not be produced, today's limited time, after the meeting welcome you to discuss, for our national industry to a higher level, thank you.

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