Izaro Laresgoiti

RWTH Aachen University · Institute for Power Electronics and Electrical Drives

The influence of the check-up on the capacity loss during calendar ageing degradation is investigated in a commercial 18650 cell with Nickel-rich cathode and Graphite-Silicon anode. Four different check-up intervals between 15 days to 90 days have been investigated during calendar ageing tests performed at 55 ◦C and state of charge (SOC) of 85 %. B...

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 w...

Lithium-ion batteries have emerged as a key enabler for a sustainable energy system. Their wide applications in electrification of traffic and the storage of fluctuating renewable energy require more and more performance in terms of safety, lifetime, energy density, costs and so on. Recently, silicon-based materials have been widely introduced in t...

This work analyzes the variation of the estimated battery capacity through an online Ah-counter algorithm in a battery pack with a significant number of cells, considering different factors such as different cell temperature distributions and inhomogeneous degradation .

Li-Sulfur battery has garnered attention due to its high energy density. However, owing to complex chemistry the working mechanism is still ambiguous and often contradictory among peers. Here we present an experimental investigation of Li-S battery cells where the behavior of current transient during potentiostatic discharge were studied. It was fo...

A High-Temperature Metal-Air Battery (HTMAB) prototype based on a simple redox reaction between molten Sn and atmospheric oxygen at 800 °C is presented, using yttria doped zirconia as solid electrolyte. Basic reversibility measurements indicate that the electrochemical reactions in the device are reversible with coulombic efficiencies higher than 9...

During cycling, mechanical stresses can occur in the composite electrode, inside the active material, but also in the solid electrolyte interphase layer. A mechanical model is proposed based on a system made of a spherical graphite particle surrounded by the solid electrolyte interphase layer. During lithium intercalation or de-intercalation, stres...

To drawreliable conclusions about the internal state of a lithium-ion battery or about ageing processes using physico-chemical models, the determination of the correct set of input parameters is crucial. In the first part of this publication, the complete set of material parameters for model parameterization has been determined by experiments for a...

Understanding the ageing phenomena in the Li-ion batteries is of great importance nowadays for their successful commercialization. Li-ion degradation under storage conditions has been widely studied and the causes are well established. However, ageing during cycling remains still unsolved nowadays. Mechanical degradation is recognized as the main a...

Understanding the ageing phenomena in the Li-ion batteries is of great importance nowadays for their successful commercialization. Li-ion degradation under storage conditions has been widely studied and the causes are well established. However, ageing during cycling remains still unsolved nowadays. Mechanical degradation is recognized as the main a...

A High-Temperature Metal-Air Battery (HTMAB) that operates based on a simple redox reaction between molten metal and atmospheric oxygen at 600-1000 °C is presented. This innovative HTMAB concept combines the technology of conventional metal-air batteries with that of solid oxide fuel cells to provide a high energy density system for many applicatio...

Battery lifetime prognosis is a key requirement for successful market introduction of rechargeable Energy Storage Systems (ESS) based on lithium-ion (Li-ion) technology. In order to make decisions at the system design stage, a procedure for making efficient predictions of battery performance over time is necessary to be developed. In this paper, a...

From system layout to the vehicle integration a lot of design steps have to be taken into account regarding high-voltage (HV) batteries for electric vehicles. Electrical performance has to be traded off against mechanical and thermal issues several times during development. Besides the physical setup also the management of the battery system has to...

From system layout to the vehicle integration a lot of design steps have to be taken into account regarding high-voltage (HV) batteries for electric vehicles. Electrical performance has to be traded off against mechanical and thermal issues several times during development. Besides the physical setup also the management of the battery system has to...

As part of this paper the Smart Wheels electric bus shall be presented, which is based on the Mercedes Sprinter City 65. The vehicle features a battery propelled electric drivetrain. It has a passenger capacity of 25 persons at an overall mass of 5.65 tons. Apart from the integration of an electric drivetrain the project aim was to develop and impl...