A machine learning-based framework for online prediction of battery ageing trajectory and lifetime
Accurately predicting batteries‘ ageing trajectory and remaining useful life is not only required to ensure safe and reliable operation of electric vehicles (EVs) but is also the fundamental step toward health-conscious use and residual value assessment of the battery. The non-linearity, wide range of operating conditions, and cell to cell variations make battery health prediction […]
Assessing Heat Generation in Lithium-ion Batteries: An Experimental Methodology
Lithium-ion batteries are becoming increasingly important for ensuring sustainable mobility, and are now the technology of choice for electric vehicles. Research into lithium-ion batteries is intensive and widespread; in order to develop advanced materials required for the technology to meet the demands of the market. However, resources are committed principally to the enhancement of power […]
Assessing Heat Generation in Lithium-ion Batteries: An Experimental Methodology
Lithium-ion batteries are becoming increasingly important for ensuring sustainable mobility, and are now the technology of choice for electric vehicles. Research into lithium-ion batteries is intensive and widespread; in order to develop advanced materials required for the technology to meet the demands of the market. However, resources are committed principally to the enhancement of power […]
On-line gas detection during the thermal runaway of Li-ion cells by coupling ARC with a mass spectrometer and external sensors
In addition to the costs, high energy density, and fast-charging capability, the safety of Li-ion batteries is most important – even after long-term usage or abusive conditions. A new combination of Accelerating Rate Calorimetry (ARC) coupled with a mass spectrometer (MS), as well as cell resistance and audio recording [1] was applied to study commercial […]
Moisture sorption and microstructural and electrochemical properties of Nickel-rich NCM based cathodes processed in normal atmosphere
Recently, investigations are focusing on Nickel-rich layered cathode active materials like LiNi0.8Co0.1Mn0.1O2 (NCM811) to improve the energy density of Lithium-ion batteries (LIBs), providing reversible capacities of approximately 200 mAh g-1. Unfortunately, the increase in nickel-content comes along with a higher sensitivity of the active material to moisture and carbon dioxide, which is why it is […]
Module & Battery Integration of All-Solid-State Lithium Ion Cells
Energy renewable resources can be stored in various ways. Considering electrochemical storage, Li-based batteries offer high energy densities combined with a high degree of design flexibility. In particular, batteries using Li+ as an ionic charge cariier are an emerging option to power electric vehicles. Such batteries may, however, suffer from flammable liquid electrolytes conventionally used […]
Learning from swarms: mini sensors for measuring the layer thickness of batteries
Optical sensors especially for coating thickness applications are still upcoming for more and more scenarios as they tend to be fast and long lasting without “touching” the surface under inspection. Non-contact and non-destructive layer thickness sensors based on the photothermal principle are becoming increasingly important for measuring layer thicknesses in battery cell production. The sensors […]
Pre-lithiation of Silicon Anodes by Thermal Evaporation of Lithium for Boosting Energy Density of Lithium Ion Cells
Lithium ion batteries (LIBs) do not only dominate the small format battery market for portable electronic devices, but have also been successfully implemented as the technology of choice for electric vehicles. However, for successful consumer acceptance and broad market penetration of electric vehicles, further improvements of LIBs in terms of energy density and cost along […]
Inhomogeneous ageing in lithium-ion batteries caused by temperature gradients
Looking at the ageing behaviour of lithium-ion batteries, the internal cell temperature is one main influencing factor. Therefore, the quantification of its impact is a key aspect of improving cycle life and is increasingly discussed in literature. In general, an optimum temperature of about 25 °C is assumed with increasing degradation both at rising and […]
Direct design comparison of Li-ion cells in the formats PHEV1, pouch, 18650, and 21700 built on pilot-scale
Commercial Li-ion cells are produced in a variety of different formats, such as cylindrical (e.g. 18650, 21700, 46800), as well as different pouch and prismatic formats. In scientific literature, there is a lack of knowledge on the effects on cell design on performance and aging. Due to differences in chemistry, it is difficult to investigate […]