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Batteries, Volume 10, Issue 12 (December 2024) – 2 articles

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18 pages, 2376 KiB  
Article
A Novel Method for Estimating State of Power of Lithium-Ion Batteries Considering Core Temperature
by Ruixue Zhang, Keyi Wang, Zhilong Yu and Gang Zhao
Batteries 2024, 10(12), 409; https://doi.org/10.3390/batteries10120409 - 22 Nov 2024
Abstract
Operation above acceptable limits in terms of current, voltage, and temperature can lead to lithium batteries overheating, increasing the risk of thermal runaway, which can also degrade battery materials more quickly, reducing overall lifespan. Estimating the state of power (SOP) of a battery [...] Read more.
Operation above acceptable limits in terms of current, voltage, and temperature can lead to lithium batteries overheating, increasing the risk of thermal runaway, which can also degrade battery materials more quickly, reducing overall lifespan. Estimating the state of power (SOP) of a battery is necessary for battery safety control and preventing operation above acceptable limits. However, the SOP is influenced by coupled multiple parameters including the state of charge, state of health, and core temperature, which make it challenging to estimate comprehensively. Based on the electro-thermal model, this study proposes a multi-parameter coupled method for comprehensively estimating the SOP considering the core temperature. This method provides a robust approach to accurately assessing the SOP across varying core temperatures, states of charge (SoC), and voltage levels. The combination of maximum likelihood estimation, adaptive genetic algorithms for parameter identification, and the unscented Kalman filter for state estimation was found to enhance the accuracy and robustness of battery models. The results show that the battery core temperature and terminal voltage are important and the main limitation on the SOP, respectively. This study lays a strong foundation for effective energy management and life extension of lithium batteries, particularly in high-temperature environments. Full article
(This article belongs to the Section Battery Modelling, Simulation, Management and Application)
8 pages, 1743 KiB  
Communication
Improved Mechanistic Degradation Modes Modeling of Lithium and Sodium Plating
by David Beck, Agata Greszta, Alexander Roberts and Matthieu Dubarry
Batteries 2024, 10(12), 408; https://doi.org/10.3390/batteries10120408 - 21 Nov 2024
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Abstract
Lithium and sodium plating are inevitable when using negative electrodes with an electrochemical potential close to one of the charge carriers. Typical testing and modeling assume that plating occurs at 0 V when measured against the charge carrier. While this might be true [...] Read more.
Lithium and sodium plating are inevitable when using negative electrodes with an electrochemical potential close to one of the charge carriers. Typical testing and modeling assume that plating occurs at 0 V when measured against the charge carrier. While this might be true under thermodynamic equilibrium, this is not true outside of steady state. This has significant implications as, by taking this into account, the testing voltage window of negative electrodes could be extended to allow gathering data for more complete discharges at higher rates. Moreover, from a modeling standpoint, it could also allow us to more accurately predict plating initiation potentials dynamically. This work presents the preliminary results of the investigation of what parameters are influencing the plating potential and how to take them into account in testing and modeling. Full article
(This article belongs to the Special Issue Battery Prognostics and Health Management)
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