Peter Bugryniec

The University of Sheffield | Sheffield · Department of Chemical and Biological Engineering

Overheating by oven exposure testing is a fundamental method to determine the severity of thermal runaway (TR) in lithium-ion cells. The TR behavior of lithium iron phosphate (LFP) cells under convection oven exposure is quantified and a comparison is made of their stability and severity against that of lithium metal oxide cells under similar condi...

In this paper, accelerated rate calorimetry (ARC) and oven exposure, are used to investigate thermal runaway (TR) in lithium-ion cells. Previous work shows that lithium iron phosphate (LFP) cells have a lower risk of TR over other Li-ion chemistries. ARC is carried out on cells at various SOC to identify which decomposition reactions are contributi...

Thermal runaway (TR) is a significant safety concern for Li-ion batteries (LIBs), which, through computational modelling can be better understood. However, TR models for LIBs lack a proper representation of the build-up of pressure inside a cell under abuse, which is integral to predicting cell venting. Here, an advanced abuse model (AAM) is develo...

Thermal runaway (TR), a major safety concern for Li-ion batteries (LIBs), involves a complex network of chemical reactions leading to the production of flammable and toxic gases. Computational modelling of LIB TR continues to aid safer battery design. But to improve the capability of TR simulations, here we apply micro-kinetic modelling to describe...

Li-ion batteries are a widely used electrochemical energy storage device. But, catastrophic failure via thermal runaway leads to great flammability and toxicity hazards. As such, there is a need to better understand the thermal runaway process. In doing so, reducing its occurrence and improving predictions of its hazards. To achieve this, we aim to...

Overview of thermal runaway of Li-ion batteries including testing methods, modeling techniques, and how to predict and prevent its occurrence.

An illustration of the initiation and development of thermal runaway in Li-ion cells, through to propagation in a battery. Also highlighting the significant hazards of thermal runaway.

Li-ion batteries are a widely used electrochemical energy storage device. But, catastrophic failure via thermal runaway leads to great flammability and toxicity hazards. As such, there is a need to better understand the thermal runaway process. In doing so, reducing its occurrence and improving predictions of its hazards. To achieve this, we aim to...

In this paper, we systematically review existing models and identify software tools suitable for the optimal planning and design of large-scale Carbon Capture, Utilisation and Storage (CCUS) infrastructure. We identify key factors, relevant system constraints (and the lack thereof) that need to be considered when optimising CCUS systems. The compon...

The extensive use of Li-Ion batteries (LIBs) in electric vehicles and stationary applications is facilitating a reduction in carbon emissions and helping to mitigate climate change. The use of LIBs is driven by their benefits of high energy density and low cost. However, LIBs can suffer from the hazard of thermal runaway. Thermal runaway is a catas...

Li-ion batteries (LIBs) are widely adopted in EVs and stationary battery energy storage due to their superior performance over other battery chemistries. But LIBs come with the risk of thermal runaway (TR) which can lead to fire and explosion of the LIB. Hence, improving our understanding of TR is key to improving LIB safety. To achieve this, we ai...

In this paper, we systematically review existing models and identify software tools suitable for the optimal planning and design of large-scale Carbon Capture, Utilisation and Storage (CCUS) infrastructure. We identify key factors, relevant system constraints (and the lack thereof) that need to be considered when optimising CCUS systems. The compon...

Preliminary work into developing microkinetic models for Li-ion battery thermal runaway decomposition reactions, using gaussian processes to optimize model parameters and minim reaction network. Presentation covers applying the new methodology to the ethylene carbonate solvent, a common electrolyte component, decomposition reactions.

It is widely accepted that Lithium-Iron Phosphate (LFP) cathodes are the safest chemistry for Li-ion cells, however the study of them assembled in to battery modules or packs is lacking. Hence, this work provides the first computational study investigating the potential of thermal runaway propagation (TRP) in packs constructed of LFP 18650 cells. U...

It is widely accepted that Lithium-Iron Phosphate (LFP) cathodes are the safest chemistry for Li-ion cells, however the study of them assembled in to battery modules or packs is lacking. Hence, this work provides the first computational study investigating the potential of thermal runaway propagation (TRP) in packs constructed of LFP 18650 cells. U...

A particular safety issue with Lithium-ion (Li-ion) cells is thermal runaway (TR), which is the exothermic decomposition of cell components creating an uncontrollable temperature rise leading to fires and explosions. The modelling of TR is difficult due to the broad range of cell properties and potential conditions. Understanding the effect that th...

Preliminary investigations of the abuse resilience of LFP battery packs, abused by the short circuit of a single cell while under extream environmental conditions. Results show that even under extream condition LFP cells lead to packs that are resilient to thermal runaway propagation.

Lithium ion (Li-ion) cells are the most prominent electrochemical energy storage device in todays world as they are utilised in many applications across many scales. However, Li-ion cells can suffer from a severe safety issue known as thermal runaway (TR). This process is due to exothermic chemical decomposition of a cells components. Being able to...

Overheating by oven exposure testing is a fundamental method to determine the severity of thermal runaway (TR) in lithium-ion cells. The TR behavior of lithium iron phosphate (LFP) cells under convection oven exposure is quantified and a comparison is made of their stability and severity against that of lithium metal oxide cells under similar condi...

In this paper a novel method to determine the specific heat capacity of lithium-ion cells is proposed. The specific heat capacity is an important parameter for the thermal modelling of lithium-ion batteries and is not generally stated on cell datasheets or available from cell manufacturers. To determine the specific heat capacity can require the us...

Results of accelerated rate calorimetry and oven abuse testing at different states of charge. Presentation shows, step-by-step, how the severity of TR reduced as SOC reduces under ARC testing. Also shows how LFP cells are much safer than other chemistries at all SOC. Under oven testing, cells are stable up to much higher temperature than other ch...

Discussion of cell safety in lithium iron phosphate cells under oven abuse and accelerated rate calorimetry testing.