Lithium ion battery aging simulation method and system and storage medium

The invention discloses a lithium ion battery aging simulation method and system and a storage medium, and relates to the technical field of lithium ion batteries, and the method comprises the steps: constructing an electrochemical equation of a battery; constructing an evolution equation of solid, liquid and gas phase states in the cell in the SEI membrane growth process; coupling the electrochemical equation with the evolution equation to construct a lithium ion battery aging mechanism model; calibrating parameters of the lithium ion battery aging mechanism model by using current and voltage data in the test process; the test comprises a charge-discharge characteristic test, an aging test, a half-cell open-circuit potential test and a geometric parameter test; and by utilizing the lithium ion battery aging mechanism model with calibrated parameters, modeling by adopting a finite element method, dividing grids, and carrying out lithium ion battery aging simulation. According to the invention, a more reliable