On-Board State-of-Health Estimation at a Wide Ambient Temperature Range in Lithium-Ion Batteries
Abstract
:1. Introduction
2. Models and Methods
2.1. The Relationship between Resistance Increase and Capacity Loss
2.2. The Effects of Temperature on Internal Resistances
2.3. The Parameter Identification Method
- (1)
- Initial the target vector θ0 and the covariance matrix P0;
- (2)
- For k = 1, 2, 3, …, after new measurements, zk and φk are available;
- (3)
- (4)
- Calculate the parameter values with Equation (13).
Initializations a | Updates b |
---|---|
, |
2.4. State of Health (SOH) Estimation Procedure
3. Experiment Design
3.1. Experiment Object
3.2. Experiment Procedure
3.3. Experiment Equipment
4. Results and Discussion
4.1. Performance Test Results
Aging state | Capacity (Ah) | Qloss (Ah) |
---|---|---|
Fresh | 4.992 | 0 |
100 cycles | 4.762 | 0.23 |
200 cycles | 4.378 | 0.614 |
300 cycles | 3.754 | 1.238 |
4.2. Model Coefficient Determining
4.3. Validating Results
Aging cycles | Temperature (°C) | Measured SOHP (%) | Estimated SOHP (%) | Measured SOHE (%) | Estimated SOHE (%) |
---|---|---|---|---|---|
0 | 50 | 100.0 | 100.6 | 100.0 | 100.6 |
100 | 30 | 98.4 | 99.8 | 95.4 | 98.7 |
200 | 10 | 92.2 | 94.7 | 87.7 | 91.8 |
300 | −10 | 71.3 | 70.9 | 75.2 | 76.7 |
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Abbreviations
BEV | battery electric vehicle |
ECM | equivalent circuit model |
EIS | electrochemical impedance spectroscopy |
EV | electric vehicle |
FUDS | Federal Urban Driving Schedule |
HEV | hybrid electric vehicle |
HPPC | hybrid pulse power characterization |
ICA | incremental capacity analysis |
RLS | recursive least-squares |
R-RC | a resistance in series with a parallel resistance and capacitance |
SEI | solid electrolyte interphase |
SOC | state-of-charge |
SOH | state-of-health |
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Wang, T.; Pei, L.; Wang, T.; Lu, R.; Zhu, C. On-Board State-of-Health Estimation at a Wide Ambient Temperature Range in Lithium-Ion Batteries. Energies 2015, 8, 8467-8481. https://doi.org/10.3390/en8088467
Wang T, Pei L, Wang T, Lu R, Zhu C. On-Board State-of-Health Estimation at a Wide Ambient Temperature Range in Lithium-Ion Batteries. Energies. 2015; 8(8):8467-8481. https://doi.org/10.3390/en8088467
Chicago/Turabian StyleWang, Tiansi, Lei Pei, Tingting Wang, Rengui Lu, and Chunbo Zhu. 2015. "On-Board State-of-Health Estimation at a Wide Ambient Temperature Range in Lithium-Ion Batteries" Energies 8, no. 8: 8467-8481. https://doi.org/10.3390/en8088467