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Optimizing the Battery Energy Storage System Using Super capacitor During Dynamic Performance of the Vehicle

Shlok Patil, Amol Mote, Prathamesh Patil, Akash Pawar, Jaydeep Shah

Abstract


A fully active Battery and Super capacitor (SC) based Energy storage system which consists a Lithium-ion battery model, SC bank, SEPIC converter and a bidirectional dc/dc converter is developed for a small electric bicycle. The small electric bicycle consist of a PMDC motor with generally a Lead-Acid or Lithium-ion battery as the Energy source. The power required by the motor to overcome the opposition forces while running on the road is taken into consideration and the load power requirement for the system is developed. The peak load power required by the motor is approximately 492 watts and the minimum is 188 watts. A MATLAB and Simulink based simulation model of the battery and SC based energy storage system which consists of a one RC Lithium-ion battery model with a SEPIC converter connected to a SC pack with a bidirectional buck-boost converter in a fully active topology is developed. The system is developed to meet the requirement of the load power as generated from the power required block. The energy management system block handles the power sharing between the battery and the SC in a way such that the health of the battery is not affected by the peaky steep currents and the SC effectively delivers the power during the instantaneous power requirement of the cycle. The battery and the SC based energy storage system is shown where the effective sharing of the load power between the battery and the SC takes place as the changes in the load power requirement of the cycle.

 

Key words: Battery, energy density, energy storage system, electric vehicle, power density, super capacitor


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References


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