P2-010
Within the FoFeBat2 project, two large-format prismatic lithium-ion cells (86 Ah, NMC622) were developed, assembled, and systematically finished and tested to validate mechanical design features. The cells were manually assembled without dry room conditions. The goal was to specifically investigate mechanical influences on cell performance. The finishing process included vacuum drying, electrolyte filling under nitrogen, […]
P2-025
The characterisation of the thermal behaviour of Li-ion battery cells is crucial for safe, reliable, and long-term operation. Temperature variations within the battery cells have been reported to potentially induce mechanical stresses. The currently used simulation technologies and material models are mostly based on phenomenological observations of the whole cell and can only reproduce the […]
P1-068
The fast-charging capability of lithium-ion batteries (LIBs) is significantly influenced by the microstructure of the electrode materials. During the electrode production process, the microstructure is significantly influenced by the calendering step, that involves the compression of electrodes between two rollers. This process step alters the density, porosity and particle orientation as well as the tortuosity, […]
P1-052
Silicon-based anodes have received significant attention in battery research due to their high energy density. However, their thermal behavior is highly temperature-dependent, making effective thermal management essential for stable operation. One of the key aspects influencing heat generation is entropy-related heat, which itself is temperature-dependent. Understanding its contribution to overall heat generation is crucial for […]
P2-060
The aging of lithium-ion cells presents a significant challenge in extending their cycle life, ensuring safety, and maintaining high performance, primarily due to the degradation of key components such as electrodes and electrolytes. As electric vehicles, portable electronics and renewable energy storage systems increasingly rely on these cells, understanding and mitigating degradation processes becomes even […]
P3-056
In recent years, lithium-ion battery applications have undergone substantial growth, yet concerns regarding safety persist. Despite the relatively low failure rate, any cell fault can impede battery application and, in the context of increasing system capacities for mobility or grid stability applications, frequently result in the destruction of substantial portions or even the entire energy […]
P5-031
A thermal management system is required to ensure the safe and optimized operation of a lithium-ion battery systems in electric vehicles. The design of the thermal management systems is thereby commonly based on the respective cell behavior only at the Begin of Life (BoL). During operation, various aging mechanisms occur on both the anode and […]
P5-005
As lithium-ion batteries age, the state-of-health (SOH) of the batteries reduces, which implies that the capacity that can be stored reduces, and simultaneously, the internal resistance increases. Before such batteries are discarded for recycling or used for a second life, the estimation of the SOH becomes very important. In this work, we investigated the applicability […]
P1-050_Frankenberg
The development of reproducible process chains for cathode sheets of solid-state batteries (SSB) is a key challenge in the further development of SSB. Contact losses between active material particles and solid electrolyte particles, high porosities and degradation processes of the solid electrolyte lead to a decrease in electrochemical performance and to faster ageing of the […]
P5-034
Self-heating ignition is an important form of failure when lithium-ion batteries are not in use, such as when stored or transported. Despite being widely studied, existing studies have only focused on fresh batteries. However, it is of more practical use to understand self-heating ignition for degraded cells, regardless of how they are used. In this […]