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Title: Quantifying EV battery end-of-life through analysis of travel needs with vehicle powertrain models

Journal Article · · Journal of Power Sources

Electric vehicles enable clean and efficient transportation; however, concerns about range anxiety and battery degradation hinder EV adoption. The common definition for battery end-of-life is when 70-80% of original energy capacity remain;, however, little analysis is available to support this retirement threshold. By applying detailed physics-based models of EVs with data on how drivers use their cars, we show that EV batteries continue to meet daily travel needs of drivers well beyond capacity fade of 80% remaining energy storage capacity. Further, we show that EV batteries with substantial energy capacity fade continue to provide sufficient buffer charge for unexpected trips with long distances. We show that enabling charging in more locations, even if only with 120 V wall outlets, prolongs useful life of EV batteries. Battery power fade is also examined and we show EVs meet performance requirements even down to 30% remaining power capacity. Our findings show that defining battery retirement at 70-80% remaining capacity is inaccurate. Battery retirement should instead be governed by when batteries no longer satisfy daily travel needs of a driver. Using this alternative retirement metric, we present results on the fraction of EV batteries that may be retired with different levels of energy capacity fade.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1249996
Alternate ID(s):
OSTI ID: 1208024
Journal Information:
Journal of Power Sources, Journal Name: Journal of Power Sources Vol. 282 Journal Issue: C; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 164 works
Citation information provided by
Web of Science

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Li-ion battery performance and degradation in electric vehicles under different usage scenarios: Usage scenarios impact on Li-ion battery and PHEV performance journal August 2015
Limitations, challenges, and solution approaches in grid‐connected renewable energy systems journal May 2020
Life Cycle Air Emissions External Costs Assessment for Comparing Electric and Traditional Passenger Cars journal January 2020
Planning for electric vehicle needs by coupling charging profiles with urban mobility journal April 2018
Life cycle assessment of emerging Ni–Co hydroxide charge storage electrodes: impact of graphene oxide and synthesis route journal January 2019
Operational strategy analysis of electric vehicle battery swapping stations journal June 2018
Integrating battery degradation in a cost of ownership framework for hybrid electric vehicle design optimization
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Second-Life Batteries on a Gas Turbine Power Plant to Provide Area Regulation Services journal March 2017
Accelerated Internal Resistance Measurements of Lithium-Ion Cells to Support Future End-of-Life Strategies for Electric Vehicles journal October 2018
An Overview of Energy Scenarios, Storage Systems and the Infrastructure for Vehicle-to-Grid Technology journal August 2018
The Effects of Lithium Sulfur Battery Ageing on Second-Life Possibilities and Environmental Life Cycle Assessment Studies journal June 2019
Using CPE Function to Size Capacitor Storage for Electric Vehicles and Quantifying Battery Degradation during Different Driving Cycles journal November 2016
Environmental Implications of the National Power Roadmap with Policy Directives for Battery Electric Vehicles (BEVs) journal November 2019