Investigation of Active Life Balancing to Recondition Li-ion Battery Packs for 2nd Life
| Autor: | Mohamed Kamel, Hongjie Wang, Marium Rasheed, Regan Zane, Kandler Smith |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
State of charge Computer science 020208 electrical & electronic engineering 0103 physical sciences 0202 electrical engineering electronic engineering information engineering 02 engineering and technology Fade 01 natural sciences Battery pack Automotive engineering Resting time Battery management systems |
| Zdroj: | 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL). |
| DOI: | 10.1109/compel49091.2020.9265808 |
| Popis: | An investigation is presented into the application of active life balancing battery management systems to recondition inhomogeneous Li-ion battery packs and achieve homogeneity in capacity for second life. This paper proposes a life balancing objective map, which controls the state of charge references for each cell in a battery pack based on its capacity relative to other cells. The impacts of life balancing objective maps on the reconditioning time and overall pack capacity fade are considered. Moreover, the proposed approach accounts for various load and environmental effects, including depth-of-discharge, battery pack temperature, number of cycles per day, and cells’ resting time at various states of charge. The study results in a battery pack with convergent capacities achieved in minimal time, while curtailing overall capacity fade. Simulation results for a battery pack with sixteen series connected 75 Ah Kokam NMC cells with 3.6% initial capacity imbalance are presented, indicating a reconditioning time of 1.34 months with a final capacity imbalance of 0.1% and an overall capacity fade of 0.005%. |
| Databáze: | OpenAIRE |
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