Mobility and Systems

Development of a characterization protocol for the thermal runaway phenomenon of Li-ion batteries

The Li-ion battery is the technology currently used by car manufacturers to provide the energy storage required for electrified vehicles. However, these Li-ion batteries can be the source of incidents with potentially dramatic consequences that can have various origins but are grouped under the term thermal runaway. Thus, understanding and controlling thermal runaway is a major issue from a safety and economic point of view for the car industry.

Development of a magneto-mechanical model to consider the impact of manufacturing processes on electrical steels

Following the rapid emergence of electric vehicles on the automotive market, manufacturers are seeking to regularly improve the performance of their products in order to stand out from the competition. The sizing phase of the electric machine is therefore important, and designers often use multi-objective optimization methods coupled with multi-physical models that describe the performance of the machine with great precision. These models are based on the geometrical parameters of the design to be simulated and on the physical characteristics of the materials given by the suppliers.

Effect of Zero-carbon combustion on lubricant aging and its impact on emissions

The general context of transport is undergoing profound change, in particular through stricter considerations of the impact of its emissions on the environment and the air quality in real use. The use of innovative carbon-free fuels, such as hydrogen (H2) and ammonia (NH3), is a way to limit emissions at the source. However, the combustion characteristics of these fuels exhibit unusual combustion properties compared to hydrocarbons. These combustion systems impact the properties of the lubricant with potentially greater thermal stress and increased dilution of oxidizing components.

Characterization and modeling of Partial Discharges (PD) in the windings of electrical machines for automotive traction

The massive introduction of electric vehicles presently is a key contributor to make automotive transport more durable. This in particular requires the ability to design more efficient and low-cost electric powertrains in order to increase the vehicles’ autonomy and to make them more competitive on the market.