Abstract
This paper deals with the Hybrid Energy Storage System (HESS) for Battery Electric, Hybrid and Plug-in Hybrid Electric Vehicles. Its performance is compared with conventional HESS design and also only Battery design, conventional design uses a bigger dc/dc converter between Battery and Ultracapacitor to satisfy the peak power demands in the real time, In this analysis a smaller dc/dc converter is used which maintains the voltage of ultracapacitor higher than the battery voltage by working as controlled energy pump. Battery will provide power directly only when voltage of the Ultracapacitor drops below the voltage of the Battery. Therefore, a constant and smooth load profile can be created for the battery. For the proposed HESS system Simulation results are presented to verify.
Highlights
The world is developing by ensuring proper usage of advanced technologies for Electric Vehicles
One of the example is the hybrid energy storage system (HESS) using battery and Ultracapacitor, where the battery is used for compensation of low-frequency power fluctuations and the ultracapacitor is used for compensation of high-frequency power fluctuations [2]
We can protect the battery from overcurrent and we can improve the overall performance of the proposed model
Summary
Batteries and ultra capacitors are both electrochemical devices. the working principles of both of these devices are dissimilar, resulting in significant differences in their properties. batteries have a relatively high energy density, which varies with chemistry and power density [1]. Batteries have a relatively high energy density, which varies with chemistry and power density [1]. Ultracapacitor has a lower energy density and higher power density. When compared to the batteries UCs have the best low-temperature performance. These characteristics help in achieving the improvement of the overall performance of the system. A number of designs have been proposed in the literature for a HESS made up of a battery pack and an ultracapacitor module, which differ from one another mostly owing to the power electronic converters involved [7,8,9,10]. Energy management capabilities and HESS exploitation may improve as the number of power electronic converters grows
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