|Performance and Life Degradation Characteristics Analysis of NCM LIB for BESS|
|Title of paper||Performance and Life Degradation Characteristics Analysis of NCM LIB for BESS|
|Author||Soon-Jong Kwon, Sung-Eun Lee, Ji-Hun Lim , Jinhyeok Choi and Jonghoon Kim|
|Status of publication||published|
The battery energy storage system (BESS) market is growing rapidly around the world.
Lithium Nickel Cobalt Manganese Oxide (LiNiCoMnO2) is attracting attention due to its excellent
energy density, high output power, and fast response characteristics. It is being extensively researched
and is finding use in many applications, such as in electric vehicles (EV) and energy storage
systems (ESS). The performance and lifetime characteristics of a battery change for varying Ni
contents. The consideration of these characteristics of a battery allow for a more reliable battery
management system (BMS) design. In this study, various experiments and analyses were carried
out using a lithium-ion battery (NCM LIB) with differing Ni contents. In particular, the following
two combinations were studied: LiNi0.5Co0.2Mn0.3O2(NCM523) and LiNi0.6Co0.2Mn0.2O2 (NCM622).
Various analyses were performed, such as C-rate (C-rate is the charge-discharge rate of a battery
relative to nominal capacity) performance tests, hybrid pulse power characterization (HPPC),
accelerated deterioration experiments, electrochemical impedance spectroscopy (EIS), parameter
estimations of battery equivalent circuits through alternating current (AC) and direct current (DC)
impedance, and comparative analyses of battery modeling.