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Impact of battery cell imbalance on electric vehicle range

Journal Article · · Green Energy and Intelligent Transportation
Due to manufacturing variation, battery cells often possess heterogeneous characteristics, leading to battery state-of-charge variation in real-time. Since the lowest cell state-of-charge determines the useful life of battery pack, such variation can negatively impact the battery performance and electric vehicles range. Existing research has been focused on control design to mitigate cell imbalance. However, it is yet unclear how much impacts the cell imbalance can have on electric vehicle range. This paper closes this knowledge gap by using a simulation environment consisting of real-world driving speed data, vehicle longitudinal control, propulsion and vehicle dynamics, and cell level battery modeling. In particular, each battery cell is modeled as an equivalent circuit model, and variations among cell parameters are introduced to assess their impact on electric vehicles range and to identify the most influential parameter variations. Simulation results and analysis can be used to assist balancing control design and to benchmark control performance.
Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
Michigan Space Grant Consortium; USDOE
Grant/Contract Number:
AC07-05ID14517
Other Award/Contract Number:
80NSSC20M0124
OSTI ID:
1993443
Report Number(s):
INL/JOU-22-69526-Rev000
Journal Information:
Green Energy and Intelligent Transportation, Journal Name: Green Energy and Intelligent Transportation Journal Issue: 3 Vol. 1; ISSN 2773-1537
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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