State of Charge Estimation for Lithium-Ion Battery with a Temperature-Compensated Model
Abstract
:1. Introduction
2. Experiments
2.1. SOC-OCV Test
2.2. Model Identification Test
2.3. Model Validation Test
3. Battery Modeling and Identification
3.1. Battery Model
3.2. Model Parameters Identification
4. EKF-Based SOC Estimation Approach
4.1. SOC Definition
4.2. EKF Algorithm
- (1)
- InitializationAssign the initial state estimate , error covariance , and .
- (2)
- Prediction
- (2)
- Correction
4.3. SOC Estimation with EKF
5. Validation and Improvement of the Estimator
5.1. Constant Discharge Validation
5.2. DST Validation
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Temperature/°C | 1/3 C Intermittent Discharge Capacity/Ah | 1/3 C Continuous Discharge Capacity/Ah |
---|---|---|
0 | 2.288 | 2.207 |
12.5 | 2.421 | 2.391 |
25 | 2.573 | 2.527 |
45 | 2.676 | 2.643 |
Discharge Rate | Temperature/°C | |||
---|---|---|---|---|
0 | 12.5 | 25 | 45 | |
1/3 C | 1 | 1 | 1 | 1 |
1 C | 0.85 | 1 | 1 | 1 |
2 C | 0.8 | 0.93 | 0.72 | 0.85 |
Temperature/°C | MAE without Correction | MAE with Correction |
---|---|---|
0 | 7.5 | 3.3 |
12.5 | 5.8 | 4.5 |
25 | 7.2 | 2.6 |
45 | 4.3 | 3.8 |
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Yang, S.; Deng, C.; Zhang, Y.; He, Y. State of Charge Estimation for Lithium-Ion Battery with a Temperature-Compensated Model. Energies 2017, 10, 1560. https://doi.org/10.3390/en10101560
Yang S, Deng C, Zhang Y, He Y. State of Charge Estimation for Lithium-Ion Battery with a Temperature-Compensated Model. Energies. 2017; 10(10):1560. https://doi.org/10.3390/en10101560
Chicago/Turabian StyleYang, Shichun, Cheng Deng, Yulong Zhang, and Yongling He. 2017. "State of Charge Estimation for Lithium-Ion Battery with a Temperature-Compensated Model" Energies 10, no. 10: 1560. https://doi.org/10.3390/en10101560