Fast charge implications: Pack and cell analysis and comparison

doi:10.1016/j.jpowsour.2018.01.091

Title: Fast charge implications: Pack and cell analysis and comparison

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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:

Tanim, Tanvir R. ^[1];

^[1]; Bewley, Randy L. ^[1];

^[1]; Liaw, Bor Yann ^[1]

Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Publication Date:: 2018-02-08

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.

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                    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.  doi:10.1016/j.jpowsour.2018.01.091.

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                    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.  doi:10.1016/j.jpowsour.2018.01.091.  https://www.osti.gov/servlets/purl/1499640.

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@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}

}

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DOI: 10.1016/j.jpowsour.2018.01.091

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