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Awarke A.,RWTH Aachen | Pischinger S.,RWTH Aachen | Ogrzewalla J.,FEV Motorentechnik GmbH
Journal of the Electrochemical Society | Year: 2013

Today's Li-ion battery stringent requirements include high electric currents, large format cells and possibly the use of carbon based current collectors, which would enhance the electrochemical-thermal non-uniformities in the cell. Although a number of models have been implemented in order to study such non-uniformities, no efforts have been made to describe the distribution of side reaction rates and their effect on aging distribution. To fill that gap, we developed a pseudo-3D porous electrode electrochemical model that incorporates via first principles the solid-electrolyte interphase (SEI) growth on the anode, which is thought to be a dominant aging mechanism. The model was used to simulate the cyclic behavior of a large format (40 Ah) Li-ion polymer pouch cell with the assumption of a carbon based positive current collector. It was found that SEI growth localization would form in the electrode thickness and planar dimensions during discharging, but would be destroyed during the subsequent charging, so that the associated aging would be uniform upon cycling. This suggests that computationally efficient lumped models could be used to describe the cell aging process associated with the SEI growth on the graphitic anode, which would be ideal for onboard implementations such as in electric vehicle applications. © 2012 The Electrochemical Society. Source


Patent
Hyundai Motor Company, FEV Motorentechnik GmbH and Kia Motors | Date: 2011-06-30

A method for predicting a NOx amount may include detecting an O2 amount in an intake air, calculating a reference O2 amount in the intake air according to a driving condition of an engine, calculating a reference NOx amount contained in an exhaust gas according to the driving condition of the engine, and primarily correcting the reference NOx amount based on the detected O2 amount in the intake air and the reference O2 amount in the intake air according to the driving condition of the engine.


Patent
Hyundai Motor Company, FEV Motorentechnik GmbH and Kia Motors | Date: 2011-06-30

A method for predicting a NOx amount, may include determining a reference NOx amount according to a driving condition of an engine, primarily correcting the reference NOx amount according to an exhaust gas recirculation (EGR) ratio, and secondarily correcting the primarily corrected NOx amount according to an environmental factor and the driving condition.


Patent
FEV Motorentechnik GmbH | Date: 2010-04-08

The invention relates to a test bed (


Patent
FEV Motorentechnik GmbH | Date: 2011-04-20

A hybrid drive system with first drive means

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