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Title: Impact of Fast Charging on Life of EV Batteries; NREL (National Renewable Energy Laboratory)

Abstract

Installation of fast charging infrastructure is considered by many as one of potential solutions to increase the utility and range of electric vehicles (EVs). This is expected to reduce the range anxiety of drivers of EVs and thus increase their market penetration. Level 1 and 2 charging in homes and workplaces is expected to contribute to the majority of miles driven by EVs. However, a small percentage of urban driving and most of inter-city driving could be only achieved by a fast-charging network. DC fast charging at 50 kW, 100 kW, 120 kW compared to level 1 (3.3 kW) and level 2 (6.6 kW) results in high-current charging that can adversely impact the life of the battery. In the last couple of years, we have investigated the impact of higher current rates in batteries and potential of higher temperatures and thus lower service life. Using mathematical models, we investigated the temperature increase of batteries due to higher heat generation during fast charge and have found that this could lead to higher temperatures. We compared our models with data from other national laboratories both for fine-tuning and calibration. We found that the incremental temperature rise of batteries during 1C to 3Cmore » fast charging may reduce the practical life of the batteries by less than 10% over 10 to 15 years of vehicle ownership. We also found that thermal management of batteries is needed for fast charging to prevent high temperature excursions leading to unsafe conditions.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
OSTI Identifier:
1215124
Report Number(s):
NREL/PR-5400-63700
Resource Type:
Conference
Resource Relation:
Conference: 28th International Electric Vehicle Symposium and Exhibition, 3-6 May 2015, Goyang, Korea
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; Electric vehicle; Fast charging; Infrastructure; Battery life; Temperature increase; Thermal management

Citation Formats

Neubauer, Jeremy, Wood, Eric, Burton, Evan, Smith, Kandler, and Pesaran, Ahmad. Impact of Fast Charging on Life of EV Batteries; NREL (National Renewable Energy Laboratory). United States: N. p., 2015. Web.
Neubauer, Jeremy, Wood, Eric, Burton, Evan, Smith, Kandler, & Pesaran, Ahmad. Impact of Fast Charging on Life of EV Batteries; NREL (National Renewable Energy Laboratory). United States.
Neubauer, Jeremy, Wood, Eric, Burton, Evan, Smith, Kandler, and Pesaran, Ahmad. Sun . "Impact of Fast Charging on Life of EV Batteries; NREL (National Renewable Energy Laboratory)". United States. https://www.osti.gov/servlets/purl/1215124.
@article{osti_1215124,
title = {Impact of Fast Charging on Life of EV Batteries; NREL (National Renewable Energy Laboratory)},
author = {Neubauer, Jeremy and Wood, Eric and Burton, Evan and Smith, Kandler and Pesaran, Ahmad},
abstractNote = {Installation of fast charging infrastructure is considered by many as one of potential solutions to increase the utility and range of electric vehicles (EVs). This is expected to reduce the range anxiety of drivers of EVs and thus increase their market penetration. Level 1 and 2 charging in homes and workplaces is expected to contribute to the majority of miles driven by EVs. However, a small percentage of urban driving and most of inter-city driving could be only achieved by a fast-charging network. DC fast charging at 50 kW, 100 kW, 120 kW compared to level 1 (3.3 kW) and level 2 (6.6 kW) results in high-current charging that can adversely impact the life of the battery. In the last couple of years, we have investigated the impact of higher current rates in batteries and potential of higher temperatures and thus lower service life. Using mathematical models, we investigated the temperature increase of batteries due to higher heat generation during fast charge and have found that this could lead to higher temperatures. We compared our models with data from other national laboratories both for fine-tuning and calibration. We found that the incremental temperature rise of batteries during 1C to 3C fast charging may reduce the practical life of the batteries by less than 10% over 10 to 15 years of vehicle ownership. We also found that thermal management of batteries is needed for fast charging to prevent high temperature excursions leading to unsafe conditions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {5}
}

Conference:
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