Sliding Mode Observer for State-of-Charge Estimation Using Hysteresis-Based Li-Ion Battery Model
Abstract
:1. Introduction
- Formalizing the hysteresis-based equivalent circuit model for Li-ion battery, based on which the charging and discharging processes are treated differently during the SoC estimation.
- A terminal sliding mode observer is designed with theoretical proof for estimating the SoC of a Li-ion battery in real time.
2. Rechargeable Battery Model
2.1. State-of-Charge and Open-Circuit Voltage Curve
2.2. Hysteresis Based Li-ion Battery Model
3. Real-Time Battery SoC Estimation Based on Terminal Sliding Mode Observer
3.1. Estimation of the Output Voltage
3.2. Estimation of the Open-Circuit Voltage
3.3. Estimation of the Polarization Voltage
4. Results and Discussion
4.1. Li-ion Battery Test Samples
4.2. Performance Evaluation between Different Battery Models
4.3. Performance Evaluation between Different Observer Methods
5. Automatic Monitoring System
- Data Acquisition
- Data Processing
- Data Publishing
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Model Type | LNMC/Graphite |
---|---|
Nominal capacity | 2000 mAh |
Nominal voltage | 3.6 V |
Charging cut-off voltage | 4.2 V |
Discharging cut-off voltage | 2.5 V |
Maximum current | 22 A |
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Chen, M.; Han, F.; Shi, L.; Feng, Y.; Xue, C.; Gao, W.; Xu, J. Sliding Mode Observer for State-of-Charge Estimation Using Hysteresis-Based Li-Ion Battery Model. Energies 2022, 15, 2658. https://doi.org/10.3390/en15072658
Chen M, Han F, Shi L, Feng Y, Xue C, Gao W, Xu J. Sliding Mode Observer for State-of-Charge Estimation Using Hysteresis-Based Li-Ion Battery Model. Energies. 2022; 15(7):2658. https://doi.org/10.3390/en15072658
Chicago/Turabian StyleChen, Mengying, Fengling Han, Long Shi, Yong Feng, Chen Xue, Weijie Gao, and Jinzheng Xu. 2022. "Sliding Mode Observer for State-of-Charge Estimation Using Hysteresis-Based Li-Ion Battery Model" Energies 15, no. 7: 2658. https://doi.org/10.3390/en15072658