EU Science Hub

Workshop: Safer Li-Ion Batteries by Preventing Thermal Propagation?

Schematic representation of thermal runaway initiation methods that can drive a battery stack into thermal propagation
©European Union, 2018
Mar 08 2018
Mar 09 2018
Petten
(NL)

This 2 day workshop discusses the current state-of-the-art of thermal propagation testing.

Leading experts will also brain-storm on the potential impact of preventing thermal propagation on the safety testing landscape.

Workshop topics

  • Thermal runaway: mechanisms and influencing factors
  • Thermal propagation
  • Thermal runaway initiation methods, fit-for-purpose testing related to external and internal abuse triggers
  • Safety strategies; methods for detecting, mitigating and preventing thermal propagation; anti-cascading strategies
  • Cost and performance penalty of mitigating thermal propagation
  • Impact of avoiding thermal runaway propagation on the current safety testing landscape

At the end of the workshop rapporteurs present a summary of each session. Key messages and conclusions will be collected and published in a final report.

Presentations

Session 1. Thermal runaway: mechanisms and influencing factors

/jrc/en/file/document/175036Sebastian Scharner (BMW) Quantitative safety characterization of li-ion cells

/jrc/en/file/document/175029Markus Börner (University of Münster) Factors influencing the thermal stability of li-ion batteries – from active materials to state-of-charge and degradation

/jrc/en/file/document/175282Claude Chanson (RECHARGE) Characterize the lithium batteries thermal run-away reaction

Session 2. Thermal propagation

/jrc/en/file/document/175038Fredrik Larsson (RISE) Thermal propagation in lithium-ion batteries

/jrc/en/file/document/175037Elisabeth Kolp. Researcher (TUM) Thermal modelling of thermal runaway propagation in lithium-ion battery systems

/jrc/en/file/document/175886Chris Orendorff (Sandia National laboratories) Fundamentals of failure propagation in lithium-ion batteries

Session 3. Thermal runaway initiation methods, fit-for-purpose testing related to external and internal abuse triggers

/jrc/en/file/document/175027Paul Coman (Independent researcher) Introduction to battery thermal runaway testing methods, from single cells to packs

/jrc/en/file/document/175030Harry Döring (ZSW) Initializing of thermal runaway for lithium-ion cells focusing on the effect of internal short circuit

/jrc/en/file/document/175031Andrej Golubkov (Virtual Vehicle) Initiation of thermal runaway with different heating devices

/jrc/en/file/document/176038Matthew Keyser (National Renewable Energy Laboratory, NREL) NREL-NASA internal short circuit instigator in lithium ion cells

Session 4. Safety strategies; methods for detecting, mitigating and preventing thermal propagation; anti-cascading strategies

/jrc/en/file/document/175283Magnus Rohde (KIT) Safety studies on li-ion cells using combined calorimetric and electrochemical methods

/jrc/en/file/document/175028Claus Middendorf (3M) Design concepts and materials for thermal propagation prevention

/jrc/en/file/document/176248Eric Darcy (NASA-Johnson Space Center) Lessons learned for achieving passive thermal runaway (TR) propagation resistant (PPR) designs for spacecraft batteries

Session 5. Cost and performance penalty of mitigating thermal propagation

/jrc/en/file/document/175320Wenzel Prochazka (avl) Cost and performance penalty of thermal propagation mitigation and venting measures

/jrc/en/file/document/175035Peter Kritzer (Freudenberg) Preventing thermal propagation – approaches & effort to implement them in a battery system

Session 6. Impact of avoiding thermal runaway propagation on the current safety testing landscape

/jrc/en/file/document/175319Thomas Timke (Solarwatt) Current and future propagation tests and the embedding in product safety

/jrc/en/file/document/175032Nicolaus Lemmertz (KIT) KIT LI-ION battery research – thermal propagation

/jrc/en/file/document/175887Daniel Doughty (Battery Safety Consulting) The landscape of thermal runaway propagation testing

Background

The European Comission communication "Accelerating Clean Energy Innovation" identified safer and higher-performing batteries as crucial to ensure electro-mobility and reliable energy supply.

Lithium-ion technology can be a solutions for electric transportation and smart grids as well as portable devices.

But the use of lithium-ion batteries can also be dangerous if they are operated outside their contort zone.Exceeding a certain onset temperature, an rapid increase in temperature is called a 'thermal runaway'.

Thermal runaway leads to pressure increase, gas and particulate emission, fire or even explosion. Thermal propagation is a cascade of thermal runaway through an entire battery pack. It can have severe consequences.

The  case of a spontaneous single cell otherwise normal operating conditions  can be more hazardous as it might happen without warning, without an  obvious cause and after a considerable service time (i.e. field  failures).

/jrc/en/file/document/174483Stage setting, scope of the workshop, references

This exploratory research workshop is organised within the Joint Research Centre Exploratory Research Activities.

Contact

Email: JRC-PTT-THERMAL-PROPAGATION-WORKSHOP@ec.europa.eu

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