Virtual Battery Users Meeting: 2021

Virtual Battery Users Meeting: 2021


Thursday 21st October 2021
2-4pm BST UK | 9-11am EDT USA |
3-5pm CET Europe

We are delighted to announce Dr Carlos Ziebert from KIT (Karlsruhe Institute of Technology) will be presenting one of the sessions. Carlos will give valuable insight into how Europe’s largest battery calorimeter centre is utilising THT-ARCs to aid battery development.

The online event will consist of two presentations covering ‘ARC Fundamentals’ and ‘How Calorimetry can help in Battery Research’. A live Q&A session will be conducted following the presentations. The webinar is suitable not only for ARC users, but also provides an educational opportunity for those interested in the technology.

A PDF copy and recording of the presentation will be sent to all registered delegates after the event.

2:00pm ARC Fundamentals – presented by Stephen Ottaway, THT UK
Topics covered will include: -
                ARC Parameters
                The importance of calibration
                How to check the calibration/spot bad calibration
                Drift checks and onset sensitivity
                Tracking rates and calorimeter choice
                Maintenance and care

2:45pm How Calorimetry can help in Battery Research – presented by Dr Carlos Ziebert, Head of the Calorimeter Center, KIT, Germany

Abstract: In the last ten years, we have established battery calorimetry as a versatile characterization technique, which allows advancements for the thermal management and the safety of batteries. With six adiabatic Accelerating Rate Calorimeters of different sizes and two sensitive Tian-Calvet calorimeters combined with cyclers we operate Europe’s largest battery calorimeter center, which enables the evaluation of thermodynamic, thermal and safety data on material, cell and pack level under quasiadiabatic and isoperibolic environments for both normal and abuse conditions (thermal, electrical, mechanical).

Calorimetry allows the collection of quantitative data required for optimum battery performance and safety. This information is applied to define the requirements for thermal management. It will be explained how calorimeters can be used for studies on heat generation and dissipation of Li-ion cells. It will be shown that by measuring the specific heat capacity and the heat transfer coefficient the measured temperature data during cycling can be converted into generated and dissipated heat data, which are needed for the adjustment of the thermal management systems.

It will be presented how battery calorimeters allow to perform safety tests on cell and pack level by applying thermal, mechanical or electrical abuse conditions. For the advanced Li-ion technology, a holistic safety assessment is in the focus, because the thermal runaway can have multiple interacting causes and effects. A test in the calorimeter reveals the entire process of the thermal runaway with the different stages of exothermic reactions. As a result of the different tests quantitative and system relevant data for temperature, heat and pressure development of materials and cells are provided. In addition, it will be explained how calorimeters allow studying the thermal runaway propagation in order to develop and qualify suitable countermeasures, such as heat protection barriers, which is currently becoming a very hot topic.

Stephen Ottaway, Director of Operations, Thermal Hazard Technology
Stephen has worked at THT for 15 years and is a technical expert in Accelerating Rate Calorimetry. He holds an MBA from Henley Business School as well as a BSc (Hons) in Molecular Science. Stephen has a wealth of experience gained from installations and training THT’s ARC customers worldwide. In his current role Stephen oversees THT’s global business activity and development.

Dr Carlos Ziebert - Head of the Calorimeter Center, KIT, Germany
Dr Ziebert earned his Diploma degree and his PhD in Physics from the Saarland University Saarbrücken. In 2002 he joined the KIT, where he is currently the leader of the group “Batteries – Calorimetry and Safety”. Since 2011 his research is focused in the field of electrochemical-thermal and safety characterization of Li-ion cells, where he has been leader in 5 projects and EERA JP ES Manager. He has 19 years of R&D experience and more than 60 peer-reviewed articles. As part of the umbrella concept “Research Factory Battery”, his group is involved in the two competence clusters Batt Use (battery usage concepts) and AQua (analytics / quality assurance) with the projects BatgasMod (battery gas modeling) and AnaLiBa (analytics on Li-ion batteries). At the European level, his group is an important partner in the Horizon 2020 project HELIOS (High-performance moduLar battery packs for sustainable urban electrOmobility Services). In the POLiS - Excellence Cluster for Battery Research Post Lithium Storage, his group is responsible for the thermal characterization and safety of Na and Mg cells, which are expected to offer greater sustainability, safety and storage capacity combined with lower costs.