How to design a zero-degradation battery: compensating for loss of lithium inventory in LFP cells with LFO additives
Controlling lithium-ion battery degradation is a major global challenge and essential to electrify transport, deploy storage on the grid, and extend the lifetime of portable electronics. Loss of lithium inventory (LLI) caused by side reactions in lithium-ion cells is one of the primary reasons behind their shorter cycle life. Researchers in the last ~15 years […]
Physics-based learning for advanced battery modeling
Lecture Abstract Integrating physics-based and data-driven approaches has emerged as a promising strategy for modelling dynamic systems. Yet, existing works primarily focus on using data-driven surrogates as replacements for physics-based models, often sacrificing accuracy for computational speed and losing critical elements like generalisability, adaptability, and interpretability that are essential for control applications. This lecture introduces […]
CT-Based Quality Control for Prismatic Cells
The electrical properties of lithium-ion batteries (LIBs) are highly dependent on the production process. Process variations during production lead to a deviation of physical product parameters, inhomogeneities, and defects. While defects should be avoided due to their significant impact on the cell’s performance and safety, inhomogeneities are often acceptable in tolerances. As a result, LIBs […]
Simulating the Impact of Electrolyte Motion on Li-Ion Battery Performance
In this lecture, the audience will gain a comprehensive understanding of the origin and significance of electrolyte flow within lithium-ion batteries. Beginning with a clear physical explanation, the fundamental mechanisms that drive electrolyte movement will be introduced, providing attendees with a solid conceptual foundation. Following this explanation, the lecture will detail how electrolyte flow can […]
The Rolling Intrinsic Strategy in High-Frequency Intraday Electricity Trading for a Battery as a Dynamic Program
Maximizing revenue for grid-scale battery energy storage systems in continuous intraday electricity markets requires strategies that are able to seize trading opportunities as soon as new information arrives. This lecture introduces and evaluates an automated high-frequency trading strategy for battery energy storage systems trading on the intraday market for power while explicitly considering the dynamics […]
The Rolling Intrinsic Strategy in High-Frequency Intraday Electricity Trading for a Battery as a Dynamic Program
Maximizing revenue for grid-scale battery energy storage systems in continuous intraday electricity markets requires strategies that are able to seize trading opportunities as soon as new information arrives. This lecture introduces and evaluates an automated high-frequency trading strategy for battery energy storage systems trading on the intraday market for power while explicitly considering the dynamics […]
10 Years of Uninterrupted Shelf Storage: How Long-Term Calendar Aging Affects the Performance of Commercial LFP/C Cells
Many companies are required to keep lithium-ion battery cells in inventory as reserve parts, e.g. for warranty purposes. This can result in long periods of shelf storage, during which cells remain in a resting state at a specific state of charge and ambient temperature for several years without being used. Due to these extended timeframes, […]
Investigation of a charging anomaly in aged commercial NCA / C-Si lithium-ion cells
Lithium-ion batteries are a key technology for the global transition to green energy. However, ensuring the safety of these batteries is essential for widespread adoption. Although the technology is safe and becoming safer, the exponential growth of the market has led to increased incident numbers. Of particular interest is the safety of aged lithium-ion cells, […]
a-SiNx as a Next Generation Anode Material for Li-Ion and Solid-State Batteries
Silicon-based materials offer a wide range of benefits for Li-ion battery applications. In comparison to carbon-based anodes, higher energy densities can be reached, and compared to lithium metal, silicon-based materials offer a reduced dendrite formation at similar capacity. Moreover, silicon-based anodes enable fast-charging and significantly easier processing, which is suitable for most existing production lines. […]
The battery passport: from regulatory compliance to a circular economy enabler
The new EU Battery Regulation opens opportunities to maximize residual battery value along the value chain. However, mere compliance is not sufficient to reap the full benefits of a circular economy. However, the battery passport, the state of certified energy (SOCE), and a BMS reset function for users with legitimate interests pose difficulties and even […]