Under the influence of battery shortage, the domestic mainstream lithium battery suppliers dramatically embarked on a capacity expansion journey this year, thus pushing forward the TWH era of lithium battery industry. Thanks to the scale expansion of lithium battery enterprises, lithium power equipment manufacturers are enjoying a booming boom, and the process of domestic equipment substitution has intensified. However, after years of in-depth research, Shenzhen Xinyuren Science and Technology Co., Ltd. (hereinafter referred to as "Xinyuren") has produced highly innovative domestic high-end equipment - Single Direction Double-sided Coating Machine (SDC), which has become a highlight in the technical development process of lithium electric coating equipment industry in recent years.

As a well-known benchmark enterprise of high-end intelligent manufacturing equipment in China, Xinyuren is committed to R&D, design, manufacturing and sales of lithium battery intelligent manufacturing equipment for new energy. After nearly 20 years of dedicated efforts, the company has formed a rich product line including coaters, rollers, slitters, ovens, lithium battery electrode manufacturing automation line, lithium ion battery automatic assembly line, automatic laminating line, etc., and has harvested a large number of mainstream lithium battery customers including CATL, BYD, lithium energy in 100 million latitudes, honeycombs and so on.
After 4 years of data validation, the invention patent composes three standards

According to the patents published by the State Intellectual Property Office, Xin Yuren has obtained five patented intellectual property rights on SDC technology as early as 2017. One of the patents described in the invention Patent "New Double-sided Coating Method and Device": the device includes the front coating die and the reverse coating die, which are located at the inlet side of the drying oven. The tension roll contacts the front of the belt to change the forward direction of the belt and is divided into the reverse coating area and the front coating area along the forward direction of the belt. The reverse coating die head is arranged at any position in the reverse coating area. The electrode material is first coated on the opposite side of the material belt by the reverse coating die head. The front coating die head is set between the reverse coating die head and the drying oven, and the front coating die is used to coat the electrode material on the front of the material belt. The invention has the advantages of no leakage, no downflow of electrode material along the outer wall of the opposite coating head and uniform coating thickness.
It is understood that Xin Yuren successfully manufactured the prototype four years ago, i.e. achieved the goal of good performance and stable state. The machine adopts self-developed combined extrusion coating die head, which has the advantages of high hardness, abrasion resistance, corrosion resistance, wide range of slurry application and convenient debugging. The design of all-air floating high-speed oven, independent upper and lower air supply structure and steady-flow static pressure chamber make the hot-air flow field more stable. With the optimum arrangement of floating air nozzles, the oven can meet the requirements of 70m/min or even higher coating speed.

Since the prototype production, the data reports of SDC coating have never been interrupted. Focusing on various inspection indexes, the technical team keeps improving and further improving the lifting machinery and equipment. According to the product characteristics and market demand of lithium power, Xinyuren has developed 3 SDC standardized equipment to meet the needs of lithium power manufacturers such as 3C energy storage and power type. With the vigorous promotion of standardized equipment process, Xinyuren SDC coater has also been recognized by customers to achieve mass production.

Breakthrough of Talent Barriers and Technology Bottlenecks

It is well known that talent barriers will affect the R&D and implementation of equipment technology, and the bottleneck of equipment technology is the limitation of applied physics. However, with the strong support of the authoritative experts of high-end intelligent equipment such as State Key Laboratory of Huazhong University of Science and Technology, Professor Li Dequn, academician of Chinese Academy of Engineering and so on, the R&D team of the company is guided by market demand, carries out DFMEA design mode and method, uses high-quality finite element analysis software and computer system to establish mathematical modeling platform, such as non-Newtonian fluid analysis, and so on. Wind field analysis, thermodynamic analysis and mechanical analysis are carried out scientifically and rigorously in a digitalized, specialized and refined R&D system.

Extreme Pursuit Brings up Three Great Advantages and Ultra High Technical Index

Advantages 1: More uniform surface density. The patented modular head of "dither-proof + true runner simulation" independently developed has the advantages of high hardness, abrasion resistance, corrosion resistance, wide range of slurry application and convenient debugging. The material of A and B coating surface comes from the same feeding tank. The drying processes of coated surfaces A and B are identical. Through the above, the surface density of the coating machine is more uniform than that of the traditional one.

Two advantages: better electrical performance. The first 1/3 of the cabinet of the equipment is heated by patented plate opening, and the high capacity design can also discharge with high rate. Single-layer oven is used to bake both sides at one time, so that the moisture uniformity of the pole piece is excellent, which completely solves the phenomena such as cracking and crimping of the pole piece caused by the second baking of traditional back-coating. SDC coating pole piece does not crimp, and there are no cracks on the surface of the pole piece, so the bonding effect is good. The plate dryness below 500PPM can be achieved. SDC coating significantly improves battery performance (cycle, capacity, self-discharge, internal resistance, etc.) compared to conventional technology.

Advantages 3: Energy saving is more than 30%, which is obvious. Compared with the design of traditional double-layer coater structure, the single-layer structure design of SDC coater can not only save a lot of costs in manufacturing, but also save the energy consumption of double-sided and simultaneous drying after coating, which can save at least 30% overall.

In terms of technical index, SDC coater can reach the high requirement parameter data, which is far beyond the normal coating level. One-sided thickness error <1.5 μ M; Double-sided thickness error < 2 μ M; The density of the coating surface < <1.0%; At 1200mm coating width, the coating speed is as high as 70m/min and so on.

Diversified substitution, general trend

The process of domestication substitution has accelerated. Domestic equipment is developed and manufactured according to the process characteristics of battery production in China. It has strong adaptability and obvious cost-performance advantage. Domestic manufacturers can fully meet the production process requirements of customers and respond quickly. SDC coater, as an outstanding representative of innovative technology, has obvious substitution effect on imported equipment due to its ultra-high cost-performance ratio.

The surpassing innovative SDC technology will gradually replace the traditional coating technology. With the vigorous development of the battery industry, while the battery enterprises are expanding rapidly, the technology is also in the process of rapid iteration and innovation. Only by keeping pace with the times and exceeding the current technology can the development of the market be guaranteed. SDC coaters with super-high cost performance and technical advantages will gradually penetrate and spread to more and more battery enterprises, thus occupying a larger market share of coaters. And Xinyuren SDC coater will also develop towards scale, standardization and modularity in the future to achieve greater breakthroughs, thus accelerating the development of the industry.

Dark horse? Black Technology? China lithium power SDC coater has been quietly mass produced!

Throughout the industry, looking at home and abroad, Xinyuren double-sided simultaneous coating technology has really brought a bright impact to the coating industry, which may be the charm of technology. It is understood that Xinyuren has formulated three standardized SDC coater models for different types of customer needs, which are: 1. 700mm wide, 25m/min coating speed and SDC4-700-40C product model, suitable for common 3C customer needs. 2. Width of coating 900mm, coating speed 30m/min (3C type)/coating speed 60m/min (power type), product model SDC5-900-50C/60D, suitable for comprehensive customer requirements; 3. Applicable to the market demand of high-end power battery customers with a coating width of 1200mm or more, a coating speed of 70m/min, and product type SDC5-1200-70D.

It is understood. At present, with the undertaking promotion of Xinyuren and the continuous approval of lithium power enterprise customers, the order quantity of SDC coater has increased accordingly. From 2021 to August alone, more than 20 units have been successfully produced. Recently, with the marketization of SDC coating technology and product standardization, Xinyuren coating machine has been favored by many leading lithium power enterprises. Xinyuren's product technology exchange and order booking are intensive and frequent. In the future, the purchase of SDC coater orders will continue to grow with the continuous recognition of the market!