How to correctly analyze the technical level of domestic power battery cells

　　On the premise of ensuring safety, improving energy density, reducing production costs, and improving product consistency are topics of widespread concern in the power battery industry. The production cost curve is constantly fluctuating, and product consistency is not easy to quantify. To evaluate the technical level of power battery companies, comparing the energy density of batteries is the most intuitive method.

　　Under the premise of ensuring safety, improving energy density, reducing production costs, and improving product consistency are topics of widespread concern in the power battery industry. The production cost curve is constantly fluctuating, and product consistency is not easy to quantify. To evaluate the technical level of power battery companies, comparing the energy density of batteries is the most intuitive method.

　　This article takes the ternary battery as an example. According to the three packaging systems of square shell, cylinder and soft package, referring to the views of some characters, without satellites, the current technology level of domestic power battery companies is analyzed based on energy density.

　　Cube shell: Ningde era and BYD may not lag behind

　　Official data show that the energy density of square shell cells in the CATL era has reached 240Wh/kg. The technical plan is to increase the cell energy density to 300Wh/kg by 2020.

　　While increasing the energy density through the 811 ternary positive electrode + silicon/carbon hybrid negative electrode, the cycle, high temperature performance, cost, safety, etc. must be sacrificed, and the production process and environmental requirements are relatively harsh.