Technical Papers and Presentations

The capacity degradation mechanism of lithium-ion batteries considering five aging factors is investigated by coupling the 0D thermal model with the P2D model and adding differential equations to the mathematical module. It is found that after multiple cycles of charging and discharging, the capacity of the battery is first linearly degraded by SEI film formation and growth, and then rapidly decreased at some point due to electrolyte consumption and gas production. This model extends the consideration of aging influencing factors, which is closer to the actual aging process of battery cells and can scientifically predict battery life.