Batalyse- Software for Battery Data Evaluation and Information Management
The market for energy storage is growing exponentially. This development is accompanied by increasing activity in research and industry for the development and selection of better material systems, cells, modules and batteries. As the number of tests increases, so does the amount of test data and information. Both must be efficiently evaluated and organized. In […]
Calendric Ageing of 18650 Lithium-Ion Cells with Si/C Anode
Although the quality of Lithium-Ion Cells is improving tremendously over the years, the prediction of the lifetime of lithium-ion batteries is still a topic of interest. Economically the lifetime estimation is needed for guarantee issues and mitigating cost risks, when designing electric vehicles and storage applications. For electric vehicles driven by private consumers, it is […]
Measurement data communication within vehicle battery modules by plastic light guide bodies
Traction batteries for electric vehicles are usually structured in modules of 10-36 cells. Currently these modules have been equipped with a monitoring electronic unit that collects measurement data from all cells and a limited number of other sensors. This module electronic unit communicates with a central battery management system. Future concepts require more sensors per […]
Toolchain for advanced modeling of rechargeable lithium-ion batteries
Battery electrical and thermal modeling is a fundamental task in understanding cell and system performance and degradation during the development of battery system for application. This is generally accomplished by i) cell and system test analysis and evaluation, ii) model selection, iii) parameterization, and iv) validation. In the frame of this work, a flexible toolchain […]
Electrical and Thermal Modeling of a Lithium Titanate Oxide based Battery for Railway Application
The electrical and thermal behaviour of a prismatic LTO cell is analyzed and modelled for different operation ranges. Afterwards the validated models are used to simulate a complete traction battery compromising of over 1000 interconnected cells for a high-power railway application. Under consideration of side cooling pipes and cell-to cell variations the whole traction battery […]
Electrical and Thermal Modeling of a Lithium Titanate Oxide based Battery for Railway Application
The electrical and thermal behaviour of a prismatic LTO cell is analyzed and modelled for different operation ranges. Afterwards the validated models are used to simulate a complete traction battery compromising of over 1000 interconnected cells for a high-power railway application. Under consideration of side cooling pipes and cell-to cell variations the whole traction battery […]
Experimental study on detecting and quantifying lithium-deposition with differential voltage analysis and coulomb-counting
High currents during fast charging of lithium-ion cells at elevated states of charge (SOC) induce undesired lithium deposition (LD), which leads to rapid loss of cyclable lithium and therewith an accelerated capacity fade. Furthermore, dendritic LD may penetrate the separator and can cause safety-critical conditions. Much research effort has been spent on detection methods of […]
Interference Scenarios during Single Cell Impedance Measurements in Automotive Battery Packs
Electrochemical Impedance Spectroscopy (EIS) of Lithium-ion (Li-ion) battery cells receives growing interest in the field of automotive battery management systems (BMSs), often referred to as “Online EIS“. EIS is a non-destructive measurement method used for battery state estimation such as temperature, state of charge and state of health. To achieve a high measurement accuracy, EIS […]
Identification of Li-ion batteries’ stress factors during vehicle’s service lifetime: Assessment and Analysis
Accelerated aging of Li-ion batteries plays a crucial role during pre-marketing characterization for warranty and lifetime estimation. The current methodology applied, both in standards and in literature, is solely based on overstress testing (ISO 12405 2018, IEC 62660-1). Such approach, being de-correlated from usage data [1–3], is failing to estimate the degradation level of the […]
Evaluation of the emission reduction potential of mobility services based on automated vehicles
Autonomous vehicles are considered the main enabler for mobility services and new ownership models in the automotive sector, since the driverless operation provides substantial benefits in terms of costs and management of the fleet. Automated vehicles, currently under development for use in mobility service fleets, are almost completely based on electric drivetrains, promising potential zero […]