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Title: The implications of fast charge in lithium ion battery performance and life: cell vs. pack

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. 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:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Idaho National Laboratory
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1478846
Report Number(s):
INL/CON-17-43667-Rev000
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Conference
Resource Relation:
Conference: 233rd ECS MEETING, Seattle, WA, 05/13/2018 - 05/17/2018
Country of Publication:
United States
Language:
English
Subject:
25 - ENERGY STORAGE; Lithium ion battery; Direct Current Fast Charging; State-of-Health

Citation Formats

Tanim, Tanvir R., Shirk, Matthew G., Bewley, Randy L., Dufek, Eric J., and Liaw, Bor Yann. The implications of fast charge in lithium ion battery performance and life: cell vs. pack. United States: N. p., 2018. Web.
Tanim, Tanvir R., Shirk, Matthew G., Bewley, Randy L., Dufek, Eric J., & Liaw, Bor Yann. The implications of fast charge in lithium ion battery performance and life: cell vs. pack. United States.
Tanim, Tanvir R., Shirk, Matthew G., Bewley, Randy L., Dufek, Eric J., and Liaw, Bor Yann. Tue . "The implications of fast charge in lithium ion battery performance and life: cell vs. pack". United States. https://www.osti.gov/servlets/purl/1478846.
@article{osti_1478846,
title = {The implications of fast charge in lithium ion battery performance and life: cell vs. pack},
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. 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 = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}

Conference:
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