Results published in existing literature are not in complete agreement regarding the effects of pulse charging. N2 - In this paper a review on the effects of pulse charging of lithium based battery technology is done. Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project The current profile applied is superior to a constant current profile with the same average current rate and operates at the limit of lithium-plating occurrence.T1 - A Critical Review on The Effects of Pulse Charging of Li-ion Batteries Concluding validation measurements show that the model-based charging controller can mitigate the occurrence of plating at low temperatures. The research shows that electrical indicators of lithium stripping are sufficient but not necessary criteria for the occurrence of lithium plating. Therefore a post-mortem study was conducted to assess the applicability of electrical plating detection methods. The occurrence of lithium plating has to be detected to validate such a charging controller. The observer, an unscented Kalman filter, allows a conservative estimation of the battery’s anode potential even in the presence of inevitable initialization, measurement, and parameterization errors. A reduced single-particle model with coarse discretization is then used to implement a state observer, to allow the model-based controller to track the battery state accurately. Transfer function and subspace identification techniques are a more performant alternative at the cost of flexibility and meaningfulness of model states. Orthogonal-collocation is a promising and scalable technique to reduce computational effort while not losing physical meaning. State-of-the-art order reduction methods are discussed regarding their benefits and drawbacks. As the charging controller has to run in real-time, a reduction of the complexity of the applied physico-chemical model is necessary. As the anode potential is a clear indicator for plating, a model-based observer estimating this potential can be used to implement a charge controller. While also for the capacity retention, no benefits can be proven, pulse charging slows down the resistance increase of the tested cells.Lithium plating is one of the primary aging mechanisms occurring during fast charging, especially at low temperatures. It is shown by measurements and physico-chemical simulations, that such schemes offer no immediate benefit during charging. A detailed analysis was conducted to assess the usefulness of pulse charging schemes in terms of speed, efficiency, and impact on aging. The goal is to charge the batteries as fast as possible under given environmental conditions with a minimal impact on safety and cycle life. This thesis uses such battery models for the analysis of existing pulse charging regimes and the development of a model-based charging controller for determining the optimal charging current. Therefore, they can be a valuable tool to analyze existing charging schemes and develop new charging methods that allow optimal battery charging. Physico-chemical battery models, sometimes also called electrochemical battery models, allow deep insights into the internal states and processes of lithium-ion batteries. Therefore, charging patterns with an optimal current are required for many applications. However, a too high charging current can permanently damage the battery and pose a safety risk. Page(s)/Article-Nr.: 1 Online-Ressource : Illustrationen, Diagrammeĭissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2021įor the usability of lithium-ion batteries in many applications, their fast charging capability plays an important role. Ringbeck, Florian Sauer, Dirk Uwe (Thesis advisor) Krewer, Ulrike (Thesis advisor) Optimized charging of lithium-ion batteries with physico-chemical models
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