Method for determining activation process of lithium ion battery

The invention relates to the technical field of battery activation, and provides a method for determining an activation process of a lithium ion battery in order to improve the efficiency of the activation process of the lithium ion battery containing a silicon-based material. The method comprises the steps of A, preparing a simulated battery sample and obtaining an SOC-OCV curve and an SOC-expansion rate curve of the simulated battery sample; B, determining a target SOC interval according to the SOC-expansion rate curve; C, determining a target OCV interval corresponding to the target SOC interval and a charging cut-off voltage according to the SOC-OCV curve; and D, activating the battery by adopting a corresponding activation strategy according to the target OCV interval and the charging cut-off voltage. By adopting the mode, the activation condition beneficial to the formation of an SEI film can be adopted in the target SOC interval in a more targeted manner, and the repeated activation test of the lithium