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Data pieces-based parameter identification for lithium-ion battery
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DOI：10.1016/j.jpowsour.2016.08.018.png)
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摘要
En 中文
Battery characteristics vary with temperature and aging, it is necessary to identify battery parameters periodically for electric vehicles to ensure reliable State-of-Charge (SoC) estimation, battery equalization and safe operation. Aiming for on-board applications, this paper proposes a data pieces-based parameter identification (DPPI) method to identify comprehensive battery parameters including capacity, OCV (open circuit voltage)-Ah relationship and impedance-Ah relationship simultaneously only based on battery operation data. First a vehicle field test was conducted and battery operation data was recorded, then the DPPI method is elaborated based on vehicle test data, parameters of all 97 cells of the battery package are identified and compared. To evaluate the adaptability of the proposed DPPI method, it is used to identify battery parameters of different aging levels and different temperatures based on battery aging experiment data. Then a concept of OCV-Ah aging database is proposed, based on which battery capacity can be identified even though the battery was never fully charged or discharged. Finally, to further examine the effectiveness of the identified battery parameters, they are used to perform SoC estimation for the test vehicle with adaptive extended Kalman filter (AEKF). The result shows good accuracy and reliability. (C) 2016 Elsevier B.V. All rights reserved.
Keyword:
Battery management system
Lithium-ion battery
Parameter identification
Aged battery
Data pieces
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期刊
IF:
7.9
论文数:
3.7W
被引数:
15.0W
机构
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