Abstract
Accurate knowledge of capacity is crucial for battery management systems as it enables them to predict future failures, specifically through the state of health metric. The primary focus of this study is to estimate battery capacity using the enhanced self-organization maps (EASOM) algorithm. The EASOM is employed here to minimize uncertainties in state of charge estimation and measurements. It identifies the most suitable candidate using an objective function and incorporates a fading memory forgetting factor to improve battery capacity estimation. To validate the precision of the proposed algorithm, six tests were conducted for hybrid electric vehicle and electric vehicle applications. EASOM demonstrated excellent performance, with a maximum error of 1.25%. Additionally, all predictive performance metrics (the mean absolute percentage error, the root-mean-square error, and the mean squared error) were within 1% in all tests.
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Data availability
The datasets generated during and/or analyzed during the current study are available in the “Chapter 4: Algorithms for capacity estimation” repository, http://mocha-java.uccs.edu/BMS2/index.html.
Abbreviations
- EASOM:
-
Enhanced self-organization maps
- BMS:
-
Battery management system
- SOH:
-
State of health
- NiCd:
-
Nickel–cadmium
- H∞:
-
H-infinity filters
- ICA:
-
Incremental capacity analysis
- AEKF:
-
Adaptive EKF
- ECM:
-
Equivalent circuit models
- FFRLS:
-
Forgetting factor recursive least squares
- EV:
-
Electric vehicle
- PHEV:
-
Plug-in hybrid electric vehicle
- MKRVM:
-
Multiple kernel relevance vector machine
- DNN:
-
Deep neural network
- DCNN:
-
Deep convolution neural network
- SOC:
-
State of charge
- EKF:
-
Extended Kalman filter
- RMSE:
-
Root-mean-square error
- SRCKF:
-
Square root cubature Kalman filter
- EK:
-
Extracting knowledge
- TLS:
-
Total least squares
- AWTLS:
-
Approximate weighted total least squares
- WTLS:
-
Weighted total least squares
- WLS:
-
Weighted least squares
- DVA:
-
Differential voltage analysis
- EIS:
-
Electrochemical impedance spectroscopy
- LSSVM:
-
Least square support vector machine
- RLU:
-
Remaining useful life
- EM:
-
Electrochemical models
- NN:
-
Neural network
- DEKF:
-
Dual extended Kalman filter
- EMD:
-
Empirical mode decomposition
- PCoE:
-
Prognostics center of excellence
- APE:
-
Absolute percentage error
- MSE:
-
Mean squared error
- MAPE:
-
Mean absolute percentage error
- SOE:
-
State of energy
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El marghichi, M. Estimation of battery capacity using the enhanced self-organization maps. Electr Eng 106, 1549–1567 (2024). https://doi.org/10.1007/s00202-023-01966-5
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DOI: https://doi.org/10.1007/s00202-023-01966-5