The application of cylindrical batteries in the electric vehicle market has become popular, and leading battery companies have followed up this technical route.
The 39Ah and 50Ah 46 series cylindrical batteries will be launched soon, with an energy density of 310Wh/kg, which can be quickly charged to 80% in 18 minutes at room temperature, and ensure no thermal diffusion in the UN38.3 extreme test environment
46 series of large cylindrical batteries
Tesla is a loyal supporter of large cylindrical batteries, and it also launched the 46 series of large cylindrical batteries for the first time on “Battery Day”, and then began to deploy large cylindrical battery production and applications in its factories in the United States and Germany. BMW is also an active promoter of cylindrical batteries.
In September this year, the BMW Group announced that it will use cylindrical batteries from 2025. “It can reduce carbon footprint and resource consumption in core manufacturing.”
In the current global power market dominated by prismatic batteries and pouch batteries, why do car companies and battery companies turn their attention to large cylindrical batteries?
High Safety & economy
- First of all, the high safety of large cylindrical batteries can be achieved technically, and it can avoid thermal diffusion, which is the most basic premise.
- Secondly, the production efficiency of large cylindrical batteries can be very high, and the manufacturing cost will be greatly reduced.
- Furthermore, because of high safety, large cylindrical batteries can use new materials such as high nickel, silicon negative electrodes, carbon nanotubes, and premium copper foil, making their performance significantly better than existing battery materials.
- In addition, the large cylindrical battery is also very suitable for the integrated design of the vehicle, and has advantages in CTP and CTC.
The BMW Group said that its new cylindrical batteries can increase the energy density by more than 20% compared with the current prismatic batteries, increase the cruising range by up to 30%, increase the charging speed by up to 30%, and reduce the cost by up to 50%.
In terms of battery technology, manufacturers are focusing on launching large cylindrical batteries and large iron-lithium batteries, with the aim of significantly reducing the cost per Wh of lithium batteries and improving product performance. Large cylindrical batteries and large iron-lithium batteries may be the main products in the next three years, and the manufacturing efficiency of large cylindrical batteries (46 series cylindrical batteries) can be increased by 30%.
The launch of the 46 series of large cylindrical batteries is of disruptive significance, including the innovation of design and production process, which can greatly reduce the cost in the manufacturing process. Therefore, the future market prospect of large cylindrical cells is broad, with high-performance sports cars, SUVs and other fields as the early stage of the market Positioning, cylindrical batteries can compete with prismatic and pouch batteries.
High safety, high manufacturing efficiency and good economy are of extraordinary significance to the large-scale manufacturing and popularization of electric vehicles, which is also an important reason for the focus and layout of car companies and battery companies.
