Influence of the Calendar Aging on the Cycle Aging of LiNiMnCoO2lithium-Ion Batteries
Journal
Journal of the Electrochemical Society
Journal Volume
168
Journal Issue
12
Date Issued
2021
Author(s)
Abstract
An experimental and theoretical study of lithium nickel manganese cobalt oxide (NMC) cells with a long rest time under different storage temperatures is carried out. We show that the long-term storage of a cell decisively influences its cycle life, and this influence is more pronounced at the late stage of the battery cycle life. Experimental outcomes demonstrate that the cycle life drops as the storage span lengthens, and the storage under relatively low temperature helps to reduce the cycle fading. Based on the experimental data, we identify the point on the fading trajectory to separate the early-medium stage and the late stage for the cycle aging. By extending the previously proposed semi-empirical model to incorporate the two-stage fading into a single formulation, the cycling capacity loss of the stored NMC cells is predicted. An incremental capacity analysis is further performed to assess the cycle fading of the cells under various storage conditions. ? 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
Subjects
Battery management systems
Charging (batteries)
Digital storage
Lithium compounds
Nickel oxide
Secondary batteries
Temperature
Battery cycle life
Cycle lives
Ion batteries
Late stage
Long-term storage
Lows-temperatures
Rest time
Semiempirical models
Storage temperatures
Theoretical study
Cobalt compounds
Type
journal article