Physical-based interpretation of lithium-ion battery automotive-related ageing
Despite its fully commercial development status, lithium-ion battery (LIB) degradation understanding and diagnostics is still not fully consolidated, involving a number of interconnected mechanisms whose effect combines into a complexly mixed performance fade. State-of-health (SoH), while lacking a harmonized definition, is usually referred as a mere fade of capacity, lacking physical background and any possibility […]
Physical-based interpretation of lithium-ion battery automotive-related ageing
Despite its fully commercial development status, lithium-ion battery (LIB) degradation understanding and diagnostics is still not fully consolidated, involving a number of interconnected mechanisms whose effect combines into a complexly mixed performance fade. State-of-health (SoH), while lacking a harmonized definition, is usually referred as a mere fade of capacity, lacking physical background and any possibility […]
Physical-based interpretation of lithium-ion battery automotive-related ageing
Despite its fully commercial development status, lithium-ion battery (LIB) degradation understanding and diagnostics is still not fully consolidated, involving a number of interconnected mechanisms whose effect combines into a complexly mixed performance fade. State-of-health (SoH), while lacking a harmonized definition, is usually referred as a mere fade of capacity, lacking physical background and any possibility […]
Field Battery Investigation – Part 1: Battery Characterization
Due to increasing automatization in todays and future vehicles, the functional safety of the power supply including the lead battery as the main energy storage is getting increased attention. For the safe determination of the state-of-function of the lead battery, the precise knowledge of aging effects and the resulting failure mechanisms in the field is […]
Blockchain-based platform for tracking battery
Batteries are energy storage devices that are present in several applications, such as: cell phones, notebooks, electric vehicles, in renewable energy generation systems. There is a strong interest from the different actors in the battery supply chain who are interested in knowing the entire history of batteries, avoiding battery tampering, changing components and cells without […]
SEI development study – Accumulation and identification of SEI-derived species from lithium metal anodes
Up to now there have been many studies on the morphology and the components of the SEI, always trying to add the next piece in solving the puzzle of this interphase. But the main issues with the analysis of this interphase remain. The fact that the SEI changes over the quantity and parameters of performed […]
A two-layer model predictive control for Hybrid Balancing Systems able to Manage Capacity, Temperature, Stress, and Losses
This work deals with the design and validation of a control strategy for hybrid balancing systems (HBSs), an emerging concept that joins battery equalization and hybridization with supercapacitors (SCs) in the same system. To control this system, we propose a two-layer model predictive control (MPC) framework. The first layer determines the optimal state-of-charge (SoC) reference […]
A new Battery Degradation-Aware Current Derating framework
Advanced battery degradation models are extremely effective to optimize sizing and operational strategies of batteries. The models can be used to make informed decisions or be integrated in real time algorithms. In general, it is unpractical to embed advanced degradation models. However, we find that complex degradation models can be mapped offline in simple look-up […]
Development of substitute cells to replicate the thermal behaviour of lithium-ion cells
The performance as well as the lifetime of lithium-ion battery cells are strongly temperature-dependent. To achieve optimal results in both aspects, efficient thermal management systems are needed in the automotive application. Along the development process of these systems, manufacturers face certain obstacles considering the validation of battery systems. An extensive experimental infrastructure is required and […]
Cell Cooling Coefficient, thermal gradients and their implications on degradation
Active cooling of Li-ion battery packs is a demanding aspect of current electric vehicles. The correct surface to maintain safe and optimal temperatures to reduce degradation is not always an obvious choice. In this work we combine experimental studies on degradation and thermal capability of different cooled surfaces, with discretised 3-D electro-thermal models to highlight […]