TOB Technologies 18650-3800mAh power battery successfully went offline recently

Date: 2022/04/02 1:02:00 * : 9

For a long time, in the field of cylindrical 18650 batteries, the recognized capacity limit in the industry is 3500mAh. Japanese and Korean companies firmly occupy the high-end market, and only a small number of domestic manufacturers can produce in small batches, with few breakthroughs. The research and development team of TOB Technologies overcame difficulties with perseverance, perseverance, and meticulous design. After more than three years of continuous failure, it finally achieved mass production of 18650-3500mAh power batteries in 2022, becoming one of the few enterprises in the industry that mastered the design and large-scale manufacturing of ultra-high capacity batteries.

According to the R&D plan of "producing, developing, and reserving a generation", the R&D team of TOB Technologies, with the strong support of the company's leaders, actively challenged the 18650 battery with higher energy density. After more than two years and over a hundred DOE (DESIGN OF EXPERIMENT) experimental programs, they finally overcame various difficulties in the manufacturing process of ultra-high nickel materials and silicon anode materials, and successfully developed the 18650-3800mAh power battery, Become one of the industry leaders capable of producing cylindrical batteries with high energy density.

18650-3800mAh power battery with a single voltage of 3.6V, an ultra-high nickel material (nickel 83 or above) for the positive electrode, and a high capacity silicon carbon material for the negative electrode. The weight of the battery core is only about 46g, the nominal energy is 13.68Wh, and the energy density is up to 290Wh/kg or above. It has excellent safety performance (can successfully pass rigorous heavy impact, extrusion, external short circuit, and other tests), excellent low-temperature performance (- 20 ℃, 1C can discharge more than 70% electricity) Supports 2C fast charging (over 70% full within 30 minutes) and 9A high current continuous discharge, which can be widely used in electric vehicles, electric bicycles, electric motorcycles, mobile power supplies, energy storage equipment, various electric tools, and other fields.

The difficulties in the application of positive electrode ultra-high nickel materials lie in how to solve the safety issues, as well as the inability of slurry coating due to freezing during the manufacturing process, the vulnerability of the electrode sheet to brittle fracture after rolling, and the high gas production during formation. The difficulties in the application of negative electrode high-capacity silicon carbon materials lie in how to solve the problems of large expansion of silicon, poor cycling performance, and difficulty in uniform dispersion. The R&D team of TOB Technologies has properly solved the safety issues and process processing challenges of batteries by optimizing positive/negative electrode adhesives, conductive agents, additives, redesigning the electrolyte formula (optimizing the type and concentration of lithium salts, the type and proportion of main solvents, the type and amount of additives), ultra-high surface density electrodes, coating membranes, and other measures.

The successful development of this product is not only a new breakthrough in the production technology of cylindrical batteries achieved by our company, but also another embodiment of the corporate spirit of "not seeking the maximum, but seeking the best".

News

About Us

TOB Technologies 18650-3800mAh power battery successfully went offline recently

: