RLPGen: A method to synthetize Representative Battery Load Profiles
Automotive high-voltage batteries react sensitively to the heterogeneity of stress factor combinations. For their development, representative load profiles are derived, wherefore various methods exist. Besides velocity-based cycles, literature also proposes the generation of electrical power trajectories. However, research studies lack a universal framework to create and optimize multivariate battery time series profiles directly from measured […]
Monte Carlo method for assessing the uncertainty in battery models – measurement accuracy and fitting process limiting design processes and battery management systems
Equivalent circuit models (ECMs) are used widely in the battery and vehicle industry today in battery management systems or for battery system simulation. Low accuracy can cost performance, reduce accuracy in state estimation and influence further parameters in a negative manner. Therefore, one places accuracy goals on the models which are developed. But of course, […]
Unveiling Behavioral Patterns in BEV Operation
The service lifetime of traction batteries of Battery Electric Vehicles (BEVs) is significant for the adoption of BEVs in the market. Many customers are afraid of the longevity of the battery and hesitate to buy a new vehicle. Therefore, in the near future new regulations will come into force to establish a common standard across […]
Insights into the mechanism of carbon nanotubes in silicon-based anodes
Silicon-based anodes are considered ideal candidate materials for next generation lithium-ion batteries but suffer from poor electrical conductivity, large volume expansion and unstable SEI. The above issues can be effectively alleviated by adding carbon nanotubes (CNTs). However, the electrochemical performances vary significantly depending on the type of CNTs added, and the intrinsic mechanism remains unknown. […]
Insights into the mechanism of carbon nanotubes in silicon-based anodes
Silicon-based anodes are considered ideal candidate materials for next generation lithium-ion batteries but suffer from poor electrical conductivity, large volume expansion and unstable SEI. The above issues can be effectively alleviated by adding carbon nanotubes (CNTs). However, the electrochemical performances vary significantly depending on the type of CNTs added, and the intrinsic mechanism remains unknown. […]
Investigation of localized high-concentration electrolyte-induced interphases in lithium metal batteries
The electrification of the transportation sector and the rising deployment of portable devices have accelerated the development of high-energy-dense batteries and revived interest in lithium metal as a high-capacity anode material alternative to the commonly used graphite. In the presence of well-known organic carbonate-based electrolyte formulations in lithium metal batteries (LMBs), high surface area Li […]
The Role of Electrolytes in Li-ion Battery Degradation: Experimental Insights and Model Advancements
Electrolyte degradations is one of key issues which determine the degradations of the Li-ion batteries. Most of the current research focuses on performance-driven studies focus with electrolyte additives, limited attention has been paid to the fundamental degradation mechanisms of base electrolyte components—such as solvent chemistry, salt concentration, and volume. By revisiting fundamental science and employing […]
Characterisation of structural and chemical changes from the macroscopic to the nanoscopic scale of Li-ion batteries for a battery ageing database
It is important to quickly categorise used batteries in order to determine their end-of-life, explore second-life applications and ensure safe storage and transportation. We have developed the database of battery ageing for such an analysis tool. Li-ion batteries were modified within and outside their specifications to induce possible ageing phenomena. EIS measurements were taken to […]
On the challenge of developing scalable and sustainable Aluminum-Ion batteries: From Active to Passive Materials
The ongoing energy revolution has spurred interest in new battery types with innovative cell chemistries over the last five to ten years. This shift is partially driven by the increasing gap between the demand and supply of essential resources like lithium, nickel, and cobalt, resulting in volatile prices, particularly for lithium.1, 2 Consequently, the search […]
Influence of Formation-Temperature on Cell Performance and Degradation
The influence of three different formation temperatures (45 °C, 60 °C, & 80 °C) on cell properties such as capacity, loss of active material, loss of lithium inventory, and resistance is investigated. These results are complemented by a cyclic ageing test.