What is the difference between cylindrical ternary lithium ion battery and square ternary lithium ion battery

Energy density ratio of up to 215WH/Kg square monomers calculated by 50AH energy density ratio can reach 205WH/Kg system grouping rate of about 1865060%, energy density ratio refers to the capacity of the unit component battery. Cylindrical monomers are calculated based on the current domestic mainstream 186501.75AH. The square is around 70%. The grouping rate of the system can imagine putting ham in the box. The gap between square hams is smaller, so the grouping rate of the system is higher. The square lithium-ion battery pack with a higher grouping rate will have more obvious advantages. In this way, the energy density ratio of the 18650 battery pack system is about 129WH/Kg when the energy density ratio of the square battery pack system is about 143WH/Kg. In the future, the energy density ratio of 18650 and square cells will reach the same time. The higher the rate, the faster the charging speed supported by the battery. The domestically manufactured main current horizontal energy cell is about 186501C, charging and discharging rate u003d charging and discharging current/extra capacity. The square can reach about 1.5-2C (you need to deal with the heat management). There are still some gaps in the 3C of the interval policy. However, the square manufacturing process will become more and more perfect to reach the established goal. 3C is completely possible. The remaining capacity of the square battery with the best cycle life can still reach 80%, while the best 18650 battery has only 70% remaining capacity. Circulate 2000 times when 1C is charged and 1C is discharged. The cycle life of the prismatic battery is better than that of the 18650 battery. Consistency For our users, the consistency of battery cells is the biggest headache for battery companies. The greater the number of cells, the more difficult it is to control consistency. The round cell battery pack is composed of 7000 18650 cells, assuming that the defective rate of a cell is 1/100,000. The square cell battery pack consists of 250 cells, and a battery pack without defective products is deemed qualified. Then the pass rate of the round cell battery pack is 0.99999^7000u003d93.2% The pass rate of the square cell battery pack is 0.9999^245u003d99.7%. Here is just an example to illustrate the use of a larger capacity and a smaller number of monomers. The square cell battery pack is more conducive to control consistency. Of course, the theoretical knowledge about battery consistency is much messier than this. Manufacturing cost The square summary cost is about 0.8 yuan/WH manufacturing cost includes material cost, equipment cost, artificial water and electricity facility cost and hidden auxiliary material cost. Now the main stream company's 18650 summary cost can be controlled at about 0.5 yuan/WH. 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: Who is safer for polymer batteries or 18650 batteries?