Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 35, Issue 11, Pages 11855-11864Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.2987383
Keywords
Batteries; Feature extraction; Estimation; Degradation; Battery charge measurement; Mathematical model; Optimization; Feature selection; lithium-ion battery; multiob-jective optimization; state-of-health estimation
Categories
Funding
- Natural Science Foundation of Shaanxi Provincial Department of Education [19JK0575]
- Fundamental Research Funds for the Central Universities [YJ202013]
- National Natural Science Foundation of China [61973042]
Ask authors/readers for more resources
As a favorable energy storage component, lithium-ion (Li-ion) battery has been widely used in the battery energy storage systems (BESS) and electric vehicles (EV). Data driven methods estimate the battery state-of-health (SOH) with the features extracted from the measurement. However, excessive features may reduce the estimation accuracy and also increases the human labor in the lab. By proposing an optimization process with nondominated sorting genetic algorithm II (NSGA-II), this article is able to establish a more efficient SOH estimator with support vector regression (SVR) and the short-term features from the current pulse test. NSGA-II optimizes the entire process of establishing a SOH estimator considering both the measurement cost of the feature and the estimation accuracy. A series of nondominated solutions are obtained by solving the multiobjective optimization problem, which also provides more flexibility to establish the SOH estimator at various conditions. The degradation features in this article are the knee points at the transfer instants of the voltage in the short-term current pulse test, which is fairly convenient and easy to be obtained in real applications. The proposed method is validated on the measurement from two LiFePO4/C batteries aged with the mission profile providing the primary frequency regulation (PFR) service to the grid.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available