Fast charge implications: Pack and cell analysis and comparison
Abstract
This study investigates the effect of 50-kW (about 2C) direct current fast charging on a full-size battery electric vehicle's battery pack in comparison to a pack exclusively charged at 3.3 kW, which is the common alternating current Level 2 charging power level. Comparable scaled charging protocols are also independently applied to individual cells at three different temperatures, 20 °C, 30 °C, and 40 °C, to perform a comparative analysis with the packs. Dominant cell-level aging modes were identified through incremental capacity analysis and compared with full packs to gain a clear understanding of additional key factors that affect pack aging. While the cell-level study showed a minor impact on performance due to direct current fast charging, the packs showed a significantly higher rate of capacity fade under similar charging protocols. This indicates that pack-level aging cannot be directly extrapolated from cell evaluation. With this being said, delayed fast charging, completing shortly before discharge, was found to have less of an impact on battery degradation than conventional alternating current Level 2 charging
- Authors:
-
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Publication Date:
- Research Org.:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1499640
- Report Number(s):
- INL/JOU-17-43278-Rev000
Journal ID: ISSN 0378-7753
- Grant/Contract Number:
- AC07-05ID14517
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Power Sources
- Additional Journal Information:
- Journal Volume: 381; Journal Issue: C; Journal ID: ISSN 0378-7753
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 - ENERGY STORAGE; Lithium ion battery; Electric Drive Vehicles; AC Level 2 charging; Direct current fast charging; Battery state of health
Citation Formats
Tanim, Tanvir R., Shirk, Matthew G., Bewley, Randy L., Dufek, Eric J., and Liaw, Bor Yann. Fast charge implications: Pack and cell analysis and comparison. United States: N. p., 2018.
Web. doi:10.1016/j.jpowsour.2018.01.091.
Tanim, Tanvir R., Shirk, Matthew G., Bewley, Randy L., Dufek, Eric J., & Liaw, Bor Yann. Fast charge implications: Pack and cell analysis and comparison. United States. https://doi.org/10.1016/j.jpowsour.2018.01.091
Tanim, Tanvir R., Shirk, Matthew G., Bewley, Randy L., Dufek, Eric J., and Liaw, Bor Yann. Thu .
"Fast charge implications: Pack and cell analysis and comparison". United States. https://doi.org/10.1016/j.jpowsour.2018.01.091. https://www.osti.gov/servlets/purl/1499640.
@article{osti_1499640,
title = {Fast charge implications: Pack and cell analysis and comparison},
author = {Tanim, Tanvir R. and Shirk, Matthew G. and Bewley, Randy L. and Dufek, Eric J. and Liaw, Bor Yann},
abstractNote = {This study investigates the effect of 50-kW (about 2C) direct current fast charging on a full-size battery electric vehicle's battery pack in comparison to a pack exclusively charged at 3.3 kW, which is the common alternating current Level 2 charging power level. Comparable scaled charging protocols are also independently applied to individual cells at three different temperatures, 20 °C, 30 °C, and 40 °C, to perform a comparative analysis with the packs. Dominant cell-level aging modes were identified through incremental capacity analysis and compared with full packs to gain a clear understanding of additional key factors that affect pack aging. While the cell-level study showed a minor impact on performance due to direct current fast charging, the packs showed a significantly higher rate of capacity fade under similar charging protocols. This indicates that pack-level aging cannot be directly extrapolated from cell evaluation. With this being said, delayed fast charging, completing shortly before discharge, was found to have less of an impact on battery degradation than conventional alternating current Level 2 charging},
doi = {10.1016/j.jpowsour.2018.01.091},
journal = {Journal of Power Sources},
number = C,
volume = 381,
place = {United States},
year = {2018},
month = {2}
}
Web of Science
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