BAK's big cylindrical battery will support mid-to-high-end EV through economy, high energy density and fast charging performance

At present, the new energy vehicle industry has moved from quantitative change to qualitative change. The related agency predicts that the global sales of new energy vehicles in 2021 are estimated to exceed 7 million. The shapely increased monthly sales and penetration rate proves that the new energy vehicle industry has entered a new stage of market-oriented explosive growth. Driven by the market, the demand for new energy vehicle power batteries has also achieved rapid release, and the innovative lithium battery products, such as full-tab big cylindrical battery, are attracting great attention.

Today, Dr. Lin Jian, Chief Scientist of BAK Battery, said in his speech at the 2021 High-tech Lithium Battery Annual Conference. "The breakthrough and application of high-nickel NCM and big cylindrical technology has significant meaning to the upgrading of driving experience. High-nickel NCM is an important technical route for mid-to-high-end electric vehicles to achieve long distance endurance and cost parity. It is expected that in 2022, the proportion of high nickel in the installed capacity of NCM is expected to increase to about 50%. High nickel + big cylindrical will become the core route of the next generation of lithium batteries, satisfy customers' higher requirements for driving experience, especially charging efficiency experience. It will support and lead the performance of mid-to-high-end models to be greatly improved.”。

Dr. Lin Jian, Chief Scientist of BAK Battery

As the firstly lithium battery company in China to release the 4680 full-tab big cylindrical, BAK's progress in the research and development of full-tab big cylindrical batteries is leading the industry. In 2019, based on the judgment on the technical route of power batteries and the needs of customers, BAK started the research and development of big sized cylindrical batteries and related core technologies at the same time, including full-tab, super-fast charging, etc.

Safety is the foundation and prerequisite of the application of new energy vehicles; it is the key problem of the full-tab big cylindrical battery technology as well. The structure of cylindrical battery is stable and less likely to bulge. Through the directional pressure relief technology, the BAK full-tab big cylindrical battery can achieve zero thermal diffusion, ensuring the overall safety of the battery pack and the consistent quality of the battery throughout its life cycle.

BAK full-tab big cylindrical battery

BAK's full-tab big cylindrical battery breaks through two critical performance limitations: energy density (lifetime) and fast charging. It will completely change the usage habits of new energy vehicle owners. Due to its structural advantages, the full-tab big cylindrical battery can be equipped with a high-nickel cathode and a silicon anode. Through advanced technologies such as silicon doping and lithium supplementation, the energy density is greatly improved, and the vehicle can provide a recharge mileage of more than 800 kilometers. Meanwhile, the big cylindrical battery generally uses an 800V high-voltage electrical structure. The battery can charge to 80% within 9-20 minutes (based on different models) and a mileage endurance of 200-300 Km in 5 minutes. It brings a revolutionary experience of charging.

As Academician Ouyang Minggao, vice president of the China EV 100, said in his speech recently, a car with a range of 1,000 kilometers can be achieved technically as long as there is demand in the market. From the perspective of luxury electric vehicles, this may be a trend.

China has a vast territory and huge temperature differences. The battery performance in different temperature is very important to new energy vehicles. BAK's full-tab big cylindrical battery can work normally between -30℃ to 60℃, effectively avoiding the dilemma of vehicles dying in the snowy northeast of China.

Achieving the simultaneous improvement of energy density, fast charging and whole package safety is a problem that has plagued the industry for a long time. Based on years of technical and experience accumulation in the field of cylindrical, BAK has found the best balance point of the "impossible triangle" on the next-generation full-tab big cylindrical battery, providing a solution for electric vehicles to enter the mid-to-high-end market. BAK believes that in the new stage of development of the new energy vehicle industry with rapid market growth and fierce competition, the technical route of high nickel + big cylinder can be expected in the future with unlimited potential.