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State-of-charge estimation is vital to maximize battery performance and ensuring safe operation. The accuracy of a state-of-charge estimation technique is greatly influenced by the accuracy of the applied battery model. However, the battery model's parameters are varying with several factors, such as temperature, charge/discharge rate, usage cycle, and age. Therefore, an online battery modeling approach...
State-of-charge estimation of rechargeable battery is vital to maximize the battery performance and ensure the safe operating condition. This paper presents state-of-charge estimation method for lithium-ion battery using adaptive unscented Kalman Filter. In this aspect, Busse's adaptive rule is implemented to update the process noise covariance of the Kalman filter. Compared with the existing adaptive...
A split-parallel hybrid electric vehicle (HEV) is a particular sub-type of the HEV in which the internal combustion engine (ICE) and electric motor provide propulsion power to different axles. Due to the coupling of power through the vehicle itself, its wheels and the road on which it moves — rather than through some mechanical device — the vehicle is referred to as a ‘through-the-road’ (TTR) hybrid...
This paper discusses the development of an energy management and supervisory control system (EMS) for a hybrid electric vehicle (HEV). It is built on National Instruments' CompactRIO embedded controller and LabVIEW Real-Time software platform. The EMS functions as the primary vehicle controller whose objective is to achieve optimal operation of the hybrid propulsion system — reduced fuel consumption...
This paper presents a bridgeless SEPIC topology with Power Factor Correction (PFC) to charge electric vehicle battery. The converter offers a few advantages such as reduce total component count and reduction of conduction loss during the conversion AC to DC, hence higher overall system efficiency. The PFC converter operated under continuous conduction mode (CCM) with average current mode control strategy...
Lithium titanate oxide is considered as the most promising anode material for lithium-ion battery owing to its fast charging capability. Its charging profile is essential to be modeled with a simple battery model for battery charger design. This paper develops a universal mathematical battery model which can be fitted to the charging profiles of different charging rates by using genetic algorithm...
One configuration of a hybrid electric vehicle (HEV) is the split-axle parallel architecture, which enables existing vehicles to be retrofitted into a hybrid vehicle with minimal modification - achieved by placing electric motors in the hub of the otherwise non-driven wheels. The present work describes different HEV configurations and identifies specific operating modes of the split-parallel architecture...
Lithium Ferro Phosphates (LiFePO4) batteries have high potential to be widely employed in the future due to its stability on chemical and thermal characteristics. Therefore, an accurate battery model of high capacity LiFePO4 battery is important for a circuit designer to handle and optimize battery usage. However, nonlinear capacity effects of the battery are usually not been considered. The ignorance...
This paper highlights the design and development of micro hydro generation system which uses water to generate renewable energy. Electricity is generated from the conversion of one form energy to another. The turbine converts the energy in the moving water into rotational energy at its shaft, which is then converted to electrical energy by generator. The proposed micro hydro system will use the water...
This paper discusses the Lithium Ion battery modeling by using equivalent circuit model with nonlinear transfer resistance. The modeling is done by using MATLAB/Simulink. A constant current pulse test is used to extract the model's parameters and the procedures are presented in details. Then the voltage responses of the conventional model, proposed model and MATLAB Li-ion cell model are compared....
This paper aimed at comparing the performance of bidirectional converter designs for renewable source power generation such as wind. The bidirectional converter is supposed to allow a bidirectional power flow between power line and a battery system. In order to determine the most applicable bidirectional converter circuit which meets a set of requirements, four types of designs which were based on...
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