A HYBRID ENERGY STORAGE SYSTEM FOR ELECTRIC VEHICLE APPLICATIONS

Abstract

This invention presents a hybrid energy storage system (HESS) for electric vehicles, utilizing a combination of batteries and ultra-capacitors to enhance energy efficiency, range, and power management. The developed system achieves flexible energy sharing by using a dual-input multiport converter, which allows for effective integration of high-energy batteries and high-power ultra-capacitors. This setup provides rapid discharge capabilities, improves regenerative braking efficiency, and extends the battery lifespan by reducing stress on each component. The converter’s dual input allows for hybridized power flow, drawing from both the battery and ultra-capacitor as needed. The dual output of the converter can feed distinct vehicle loads, such as the motor drive and auxiliary systems, meeting the varied power demands within the vehicle. This system is adaptable to different EV architectures and supports bidirectional power flow, crucial for energy recovery and regenerative braking. The proposed HESS design has a compact and cost-effective configuration, making it viable for extensive application in the EV industry.

Specification

Description:The hybrid energy storage system (HESS) for electric vehicle applications is designed to optimize power management by efficiently sharing energy between a battery and an ultracapacitor. This system comprises a multiport converter that manages the flow of power between these sources and multiple vehicle loads.
The HESS architecture includes a high-frequency switching mechanism to minimize energy losses and maximize efficiency. Its bidirectional power flow capability enables not only power delivery to the loads but also energy recovery through regenerative braking, which recharges the ultracapacitors during deceleration and ultimately contributes to extending the vehicle's driving range.
An essential feature of the HESS is its intelligent control strategy, which dynamically allocates power from the battery and ultracapacitor based on driving conditions, reducing strain on the battery and enhancing its lifespan. This adaptable system can support various configurations, from small passenger vehicles to larger commercial fleets, ensuring that the powertrain's size, weight, and cost remain feasible for practical implementation. By incorporating HESS, this invention significantly advances EV technology, providing a robust, efficient, and scalable solution for modern energy storage challenges. , Claims:A hybrid energy storage system (HESS) for electric vehicle applications, configured to manage power flow efficiently between a high-energy battery and a high-power ultra-capacitor.
The HESS as claimed in Claim 1, wherein the system enables bidirectional power flow, supporting regenerative braking and energy recovery functionalities.
A modular and compact HESS design, allowing easy integration across various electric vehicle architectures and reducing system size, weight, and cost.
Scalability of the HESS, enabling its application across different EV types, including passenger cars, commercial fleets, and hybrid configurations.
The HESS as claimed in any of the preceding claims, designed to improve energy efficiency, extend vehicle range, reduce battery stress, and enhance the overall performance of electric vehicles.

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