Vehicle Power and Propulsion Conference 

About: Vehicle Power and Propulsion Conference is an academic conference. The conference publishes majorly in the area(s): Electric vehicle & Battery (electricity). Over the lifetime, 3312 publications have been published by the conference receiving 37268 citations.

A Generic Battery Model for the Dynamic Simulation of Hybrid Electric Vehicles

Abstract: This paper presents an easy-to-use battery model applied to dynamic simulation software. The simulation model uses only the battery State-Of-Charge (SOC) as a state variable in order to avoid the algebraic loop problem. It is shown that this model, composed of a controlled voltage source in series with a resistance, can accurately represent four types of battery chemistries. The model's parameters can easily be extracted from the manufacturer's discharge curve, which allows for an easy use of the model. A method is described to extract the model's parameters and to approximate the internal resistance. The model is validated by superimposing the results with the manufacturer's discharge curves. Finally, the battery model is included in the SimPowerSystems (SPS) simulation software and is used in the Hybrid Electric Vehicle (HEV) demo. The results for the battery and for the DC-DC converter are analysed and they show that the model can accurately represent the general behaviour of the battery.

Battery balancing methods: A comprehensive review

Abstract: The trend toward more electric vehicles has demanded the need for high voltage, high efficiency and long life battery systems. A complete battery system consists of the following parts: protection, management and balancing. Of the three parts, balancing is the most important concerning the life of the battery system because without the balancing system, the individual cell voltages will drift apart over time. The capacity of the total pack will also decrease more quickly during operation which will result in the fail of the total battery system. This condition is especially severe when the battery has a long string of cells (high voltage battery systems) and frequent regenerative braking (charging) is done via the battery pack. This paper presents the theory behind the proposed balancing methods for battery systems within the past twenty years. Comparison between the methods is carried out and different balancing methods are grouped by their nature of balancing.

Impact of electric vehicles on power distribution networks

Abstract: The market for battery powered and plug-in hybrid electric vehicles is currently limited, but this is expected to grow rapidly with the increased concern about the environment and advances in technology. Due to their high energy capacity, mass deployment of electrical vehicles will have significant impact on power networks. This impact will dictate the design of the electric vehicle interface devices and the way future power networks will be designed and controlled. This paper presents the results of an analysis of the impact of electric vehicles on existing power distribution networks. Evaluation of supply/demand matching and potential violations of statutory voltage limits, power quality and imbalance are presented.

Passive and active battery balancing comparison based on MATLAB simulation

Abstract: Battery systems are affected by many factors, the most important one is the cells unbalancing. Without the balancing system, the individual cell voltages will differ over time, battery pack capacity will decrease quickly. That will result in the fail of the total battery system. Thus cell balancing acts an important role on the battery life preserving. Different cell balancing methodologies have been proposed for battery pack. This paper presents a review and comparisons between the different proposed balancing topologies for battery string based on MATLAB/Simulink® simulation. The comparison carried out according to circuit design, balancing simulation, practical implementations, application, balancing speed, complexity, cost, size, balancing system efficiency, voltage/current stress … etc.

Basic experimental study on helical antennas of wireless power transfer for Electric Vehicles by using magnetic resonant couplings

Abstract: Wireless power transfer is required for the diffusion of Electric Vehicles (EVs) because it makes possible the process of automatically charging EVs The technology of wireless power transfer requires three main elements: large air gaps, high efficiency and a large amount of power Though, there has been no such technology, recently, the technology of electromagnetic resonant couplings was proposed and named WiTricity With this technology there are large air gaps, high efficiency and large amounts of power In this paper, the feasibility of wireless power transfer for EVs by electromagnetic resonance coupling is studied We studied small sized antennas that can be equipped on the bottom of a vehicle and we studied the electrical characteristics of the antenna with equivalent circuits, electromagnetic analysis and experimentation The length of the air gaps between a transmitting antenna and a receiving antenna affect resonance frequencies The resonance frequency changes from two to one depending on the length of the air gap Until a certain distance, maximum efficiencies are not changed Large air gaps are weak couplings In a weak coupling at resonance, magnetic resonance couplings can transfer energy with high efficiency The specification results at high power are proposed In this paper, the feasibility of wireless power transfer with large air gaps and high efficiency by small sized antennas that can be equipped on the bottom of EVs is proposed