A Study on State of Charge and State of Health Estimation in Consideration of Lithium-Ion Battery Aging
Abstract
:1. Introduction
2. Methodology Development
2.1. Conventional Methods for SOC Measurement
2.2. Newly Proposed Internal Resistance Tracking Method
3. Battery Simulation Based on the Shepherd Model
4. Implementation of the Internal Resistance Tracking Algorithm with Simulated Data
5. Implementation of the Novel Internal Resistance Tracking Algorithm with Experimental Data
6. Conclusions
Funding
Acknowledgments
Conflicts of Interest
References
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Nominal Capacity | 2600 mAh | |
Minimum capacity | 2550 mAh | |
Nominal voltage | 3.7 V | |
Discharge cut-off voltage | 2.75 V | |
Charging voltage | 4.2 V | |
Calculated internal resistance | 0.09 Ω | |
Max charge and discharge current | Charge | 2600 mA |
Discharge | 5200 mA | |
Operating temperature | Charge | 0~45 °C |
Discharge | −20~60 °C |
Cycles | Cycle 0 | Cycle 25 | Cycle 50 | Cycle 75 | Cycle 100 |
---|---|---|---|---|---|
Time to CEDV | 3530 s | 3504 s | 3485 s | 3469 s | 3457 s |
Qmax | 9178 Wh | 9110 Wh | 9061 Wh | 9019 Wh | 8988 Wh |
SOH | 100% | 99.25% | 98.72% | 98.26% | 97.92% |
SOC Levels | 99~98% | 98~97% | 97~96% | 96~95% | 95~94% | 94~93% | 93~92% |
---|---|---|---|---|---|---|---|
Time for Qmax within 1.00% accuracy of converged Qmax | 114 s | 359 s | 247 s | 152 s | 79 s | 139 s | 315 s |
Time for Qmax within 0.50% accuracy of converged Qmax | 164 s | 464 s | 394 s | 202 s | 95 s | 196 s | 375 s |
Time for Qmax within 0.25% accuracy of converged Qmax | 228 s | 543 s | 549 s | 289 s | 108 s | 268 s | 425 s |
Time for Qmax within 0.10% accuracy of converged Qmax | 364 s | 614 s | 691 s | 501 s | 120 s | 606 s | 472 s |
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Choi, W. A Study on State of Charge and State of Health Estimation in Consideration of Lithium-Ion Battery Aging. Sustainability 2020, 12, 10451. https://doi.org/10.3390/su122410451
Choi W. A Study on State of Charge and State of Health Estimation in Consideration of Lithium-Ion Battery Aging. Sustainability. 2020; 12(24):10451. https://doi.org/10.3390/su122410451
Chicago/Turabian StyleChoi, Woongchul. 2020. "A Study on State of Charge and State of Health Estimation in Consideration of Lithium-Ion Battery Aging" Sustainability 12, no. 24: 10451. https://doi.org/10.3390/su122410451
APA StyleChoi, W. (2020). A Study on State of Charge and State of Health Estimation in Consideration of Lithium-Ion Battery Aging. Sustainability, 12(24), 10451. https://doi.org/10.3390/su122410451