T. Coosemans

An Advanced Power Electronics Interface for Electric Vehicles Applications

Power electronics interfaces play an increasingly important role in the future clean vehicle technologies. This paper proposes a novel integrated power electronics interface (IPEI) for battery electric vehicles (BEVs) in order to optimize the performance of the powertrain. The proposed IPEI is responsible for the power-flow management for each operating mode. In this paper, an IPEI is proposed and designed to realize the integration of the dc/dc converter, on-board battery charger, and dc/ac inverter together in the BEV powertrain with high performance. The proposed concept can improve the system efficiency and reliability, can reduce the current and voltage ripples, and can reduce the size of the passive and active components in the BEV drivetrains compared to other topologies. In addition, low electromagnetic interference and low stress in the power switching devices are expected. The proposed topology and its control strategy are designed and analyzed by using MATLAB/Simulink. The simulation results related to this research are presented and discussed. Finally, the proposed topology is experimentally validated with results obtained from the prototypes that have been built and integrated in our laboratory based on TMS320F2808 DSP.

Lithium-ion capacitor — Advanced technology for rechargeable energy storage systems

This paper presents the electrical and thermal behaviour of an advanced lithium-ion capacitor (LIC) based rechargeable energy storage systems. In the proposed study, an extended statistical analysis has been performed to evaluate the main electrical parameters such as resistance, power, capacitance, rate capabilities, variation between cells and thermal parameters. Based on the performed analysis, an electrical model has been developed for dimensioning and evaluation of various applications based on lithium-ion capacitor technology.

A comparative study of different control strategies of On-Board Battery Chargers for Battery Electric Vehicles

On-Board Battery Charger is one of the key components required for the emergence and acceptance of Battery Electric Vehicles (BEVs). The control strategy of the battery charger plays an important role in the development of BEVs. Therefore, the proper selection of this control strategy can significantly improve the performance of the BEVs during charging mode from the grid. In this paper, a comparative study of different control strategies of on-board battery chargers for BEVs is presented. In this research, three control strategies are designed and applied to control the power flow of the on-board battery charger during charging mode from the ac grid. These control strategies are hysteresis current control (HCC), Proportional-Integral Control (PIC) and Proportional-Resonant Control (PRC). These control strategies are designed and analyzed by using MATLAB/Simulink. The simulation and experimental results are provided.

Lithium Iron Phosphate - Assessment of Calendar Life and Change of Battery Parameters

This paper represents the calendar life cycle test results of a 7Ah lithium iron phosphate battery cell. In the proposed article and extended analysis has been carried out for the main aging parameters during calendar life and the associated impact of the used battery model. From the analysis, it has been showed that the impact of high temperatures and state of charge is harmful for the lifetime of the battery. Therefore, there is a need for having a dedicated control strategy for keeping the battery in the most appropriate operating condition. The FreedomCar battery model parameters have been analyzed during calendar life.

Analysis of Nickel-Based Battery Technologies for Hybrid and Electric Vehicles

In this study, a comprehensive analysis has been performed for the evaluation of the performances of nickel–metal hydride and nickel–cadmium battery cells under different environmental conditions such as temperatures (10, 25, and 40xa0°C), current rates, and states of charge for battery electric vehicles. The selected cells where F-size with capacities of 13xa0Ah for NiMH and 7xa0Ah for NiCd.