Dynavolt Technology breaks through the old -Lithium - Ion Battery Equipment

Dynavolt Technology breaks through the old limits -Lithium - Ion Battery Equipment

For a long time, in the field of cylindrical 18650 batteries, the industry-recognized capacity limit is 3500mAh. Japanese and Korean companies firmly occupy the high-end market. Only a small number of domestic manufacturers can produce small batches, and there are few breakthroughs. The R&D team of Fujian Dynavolt New Energy Technology Co., Ltd. (hereinafter referred to as "Fujian Dynavolt New Energy"), a wholly-owned subsidiary of Dynavolt Technology, has overcome difficulties and has been determined to overcome many difficulties. It finally achieved mass production of 18650-3500mAh power lithium batteries in 2021, becoming one of the few companies in the industry that has mastered the design and large-scale manufacturing of ultra-high-capacity batteries.(Lithium - Ion Battery Equipment)

According to the R&D plan of "production generation, R&D generation, reserve generation", Fujian Dynavolt New Energy R&D team, with the strong support of the company's leaders, took the initiative to challenge the 18650 battery with higher energy density. The DOE (DESIGNOFEXPERIMENT) experimental method has finally overcome various difficulties in the process of ultra-high nickel materials and silicon anode materials, and successfully developed a 18650-3800mAh power lithium battery, becoming an industry leader capable of producing cylindrical batteries with high energy density one.

18650-3800mAh power lithium battery, the monomer voltage is 3.6V, the positive electrode is made of ultra-high nickel material (above nickel 83), the negative electrode is made of high-capacity silicon carbon material, the weight of the cell is only about 46g, the nominal energy is 13.68Wh, the energy The density is as high as 290wh/kg or more, with the best safety performance (can successfully pass the harsh heavy object impact, extrusion, external short circuit and other tests), excellent low temperature performance (-20 ℃ 1C can release more than 70% of electricity), support 2C fast charging (more than 70% full within 30 minutes), supports 9A high current continuous discharge, can be widely used in electric vehicles, electric bicycles, electric motorcycles, mobile power supplies, energy storage equipment, various power tools and other fields.

The temperature curve of Dynavolt 18650-38P power cell under different discharge rates

The application difficulty of the cathode ultra-high nickel material lies in how to solve the safety problem, the freezing of the slurry during the process and the inability to coat, the brittleness of the pole piece after rolling, and the formation of more gas. The application difficulty of the anode high-capacity silicon carbon material It is how to solve the large expansion of silicon, poor cycle performance, and difficulty in dispersing evenly. Fujian Dynavolt New Energy R&D team optimized the positive/negative electrode binder, conductive agent, additives, redesigned the electrolyte formula (optimized the type and concentration of lithium salt, type and proportion of main solvent, type and amount of additives), super high surface Measures such as density electrodes and coating separators have properly solved the battery safety problems and process processing problems.

Safety performance test results

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



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