At the Chinese Electric Vehicle Hundred People Conference held on March 27, Dr. Liu Jincheng, the chairman of Yimei Lithium, made a special report, mentioned that the "big cylindrical" battery cell is expected to become the ultimate technical direction of the battery. Overly optimistic about this battery technology route. We know that lithium -ion batteries are divided into cylindrical cells, soft bag cells and square batteries in terms of structural form. Different products represent a technical route. Endless, with a certain degree of autonomous subjective consciousness. However, the rapid development of square batteries, blade batteries, etc. in the past few years has allowed a square cell with larger a single capacity in the field of electric vehicles. Some small batteries are used more, and products such as electric vehicles that require larger capacity are gradually replaced. In 2020, Tesla announced the 4680 cylindrical battery, combined with its full -pole ear process, which can solve the problem of low capacity and low power density of cylindrical cells, thereby making the cylindrical cell, especially the "big" cylindrical cells becoming a hot spot, and at the same time A technical route is used for electric vehicles, energy storage batteries and other fields. Energy storage batteries, especially in areas with low energy storage, industrial and commercial energy storage, etc., in the past, everyone discussed more about the use of square batteries, but the emergence of large cylindrical batteries has basically changed the technical route. Due to the large cylindrical battery, the large cylindrical battery Safety and economy are more prominent, and it will definitely be promoted and applied in the field of energy storage batteries such as households, industry and commerce. The energy storage battery in these fields is basically fixed, but the energy of different energy will be required with different users. This can be adjusted only the battery capacity parameters. Small (compared to square batteries), it is very conducive to our different capacity of energy storage batteries, such as a 20AH capacity iron phosphate large cylindrical cell. We can be designed as a 16S5P of 48V100AH equivalent to 5kWh energy storage battery , It can also be designed as an energy storage battery of 16S10P as 48V200AH. In addition, the cylindrical battery design energy storage battery is conducive to the low -cost heat dissipation of the internal battery cell in the energy storage battery, while the cooling cost of square battery design is very high