Is the cylindrical battery for new energy vehicles better or the soft pack battery more powerful?

Cylindrical batteries can be divided into models such as 14650, 18650, 21700, etc. This is the name of the battery named by the size of the battery. 18650 is currently the most common battery model on the market and the most mature technology, while 21700 is a new type of battery that Tesla has promoted in recent years. The size of a single cylindrical battery has become larger, and the amount of power is also more. As a result, the number of batteries can be greatly reduced, making the vehicle more advantageous in terms of battery system control. After years of development, the standardization of cylindrical batteries is relatively high, and it is easy to achieve uniform standards in the industry. In addition, cylindrical batteries also have inherent advantages in terms of heat dissipation. A good heat dissipation space is formed between the cylinder and the cylinder during packaging. Therefore, some vehicles equipped with cylindrical batteries adopt lower-cost air-cooling technology. Tesla is vigorously advancing the 21700 battery technology. It is undeniable that the current high adoption rate of cylindrical batteries in the industry has been affected by Tesla to a certain extent. For vehicles using cylindrical batteries, it is unprepared to face the battery control problem caused by a large number of battery cells. After all, even if the 21700 battery is used, thousands of cylindrical batteries must be put together to form a battery pack. Very huge. In addition, because the cylindrical battery needs to use a steel shell when assembled into a battery pack, its weight is relatively high, and its energy density is insufficient compared with the other two shapes of batteries. ◆Square battery The plasticity of the square battery will be stronger, and it can be customized according to the detailed requirements of the product. But this has also led to different sizes of square batteries, and the manufacturing process standards are not as clear as cylindrical batteries. But because of its high flexibility, it has been used in early new energy vehicles for a long time. Car companies can customize the battery size according to different models, without being restricted by cylindrical battery standards. The prismatic battery was once considered to be the most suitable battery design for new energy vehicle applications. At present, prismatic batteries have been used in many models, such as BMW’s i-series models, Roewe ERX5, Weilai ES8, and BMW’s 3-series and 8-series new energy models, which also adopted prismatic battery technology. BMW also hoped at the time. As a result, the current goal of lightweighting of new energy vehicles is realized. ◆Soft pack battery The soft pack battery adopts overlapping manufacturing methods, so it is smaller in size and higher in energy density. This is very suitable for the needs of my country's new energy vehicle market. Soft pack batteries can also be customized like square batteries. Especially for hybrid vehicles, when considering the layout and counterweight of the vehicle, the advantages of the soft pack battery are even more clear. Because the soft-pack battery pursues a thinner process, it uses an aluminum-plastic film package that is lighter than the aluminum shell. It is so thin that you can even feel the flow of the internal liquid battery by hand. Lighter battery packs can make the overall vehicle weight lower, which also provides car companies with more layout methods. With the advancement of technology, lighter single cells have more room for taking into account energy density. At present, GM’s Buick’s VELITE5/VELITE5, Cadillac’s CT6 plug-in, XT5 hybrid models, and Nissan’s Sylphy battery all use soft pack batteries. Generally speaking, soft-pack batteries are more popular among Korean and American car companies. Hyundai and General Motors' latest new energy models use soft-pack batteries. ◆Which is more advanced? In the current new energy vehicle market, the three battery shapes of cylindrical, square, and soft packs all have a certain proportion of use. There is no absolute difference between good and bad. It can only be said that each has its own advantages and disadvantages. Cylindrical batteries have been developed for a long time, so the manufacturing process is more mature and the cost is lower. At the same time, there are fixed international standards to weigh the pros and cons of the products. However, in terms of battery layout and energy density, there is still room for further improvement in cylindrical batteries. While prismatic batteries and soft-pack batteries, although it is difficult to compare with cylindrical batteries in terms of standardization, their customized features enable them to better coordinate with vehicles and meet the special needs of different manufacturers and different models. Especially for soft-pack batteries, the use of aluminum film shells can improve efficiency while ensuring safety, but due to cost constraints, there are not many car companies that currently adopt them. Cylindrical, square and soft pack batteries have their own value in terms of the market, but cylindrical ternary lithium batteries have become the current mainstream, which is also a compromise choice for car companies after weighing performance and cost. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What is the significance of developing a lithium battery energy storage system