Low temperature formation: During the charging and discharging process, the battery cell is always in a low temperature environment. The SEI film formed in the low temperature process is dense and stable, but the reaction speed is slow and the formation time is long.
High-current formation: During the formation process, the charging and discharging currents are always at high currents such as 0.5C, 1C, 2C, etc. The high currents can increase the electrochemical reaction rate and the SEI film formation rate, but the SEI films formed are not consistent. Loose and unstable
Low current formation: During the formation process, the charging and discharging currents are always at small currents such as 0.02C, 0.05C, etc. The SEI film formed during the low current process is dense and stable, but the reaction rate will be reduced and the formation time will be prolonged.
Closed mouth molding: During the charging and discharging process, the liquid injection port of the battery cell is always in a sealed state, and there is no requirement for environmental humidity conditions during the molding process. However, the molding equipment process is complicated and there is a risk of plastic deformation of the battery cell shell.
