Durability and reliability of electric vehicle batteries under electric utility grid operations: Bidirectional charging impact analysis

JOURNAL OF POWER SOURCES

卷:358

Article

Dubarry, Matthieu¹  Devie, Arnaud¹  McKenzie, Katherine¹ 

[1] Univ Hawaii Manoa, SOEST, Hawaii Nat Energy Inst, 1680 East West Rd,POST 109, Honolulu, HI 96822 USA

关键词: Lithium-ion;    Cell-to-cell variations;    Vehicle-to-grid;    Grid-to-vehicle;    V2G;    G2V;    Smart grid;    Electric vehicle;    Bidirectional charging;   

DOI  :  10.1016/j.jpowsour.2017.05.015

来源: Elsevier

【 摘 要 】

Vehicle-to-grid and Grid-to-vehicle strategies are often cited as promising to mitigate the intermittency of renewable energy on electric power grids. However, their impact on the vehicle battery degradation has not been investigated in detail. The aim of this work is to understand the impact of bidirectional charging on commercial Li-ion cells used in electric vehicles today. Results show that additional cycling to discharge vehicle batteries to the power grid, even at constant power, is detrimental to cell performance. This additional use of the battery packs could shorten the lifetime for vehicle use to less than five years. By contrast, the impact of delaying the charge in order to reduce the impact on the power grid is found to be negligible at room temperature, but could be significant in warmer climates. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free