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Title: Optimization of Electric Vehicle Charging Stations with Battery based Energy Storage Systems using a Pulse Charging Mechanism
Authors: Perera, N.
Abeyratne, S.
Keywords: Electric vehicle
Energy storage
Fast charging
Level- 2 charger
Pulse charging
Issue Date: 6-Apr-2016
Publisher: SLIIT
Series/Report no.: NCTM 2016;015
Abstract: The All-Electric Vehicle (EV), whose power is de- rived from a battery with high energy/power density, has become a major contributor to the concept of sustainable development. An EV charging station should be able to deliver the power demanded by a car battery at a given rate. However, as the number of cars plugged in at the station increases, the charging station eventually becomes saturated as it approaches its own output power capacity due to grid limitations. One way to overcome this issue is to integrate a battery based energy storage system to the charging station. However, charging of these storage batteries is again limited by the grid constraints on maximum power and current ratings. As a solution, this work proposes a charging station configuration which uses pulse charging to speed up the charging process of the battery storage while adhering to grid restrictions, especially for level-2 charging stations in Sri Lanka. Furthermore, conceptually, the proposed system can be extended to accelerate the charging process of the EV’s battery itself. Experimental results, using a Pb-acid battery, are presented to validate the reduction of charging time due to pulse charging: the results show a 13.5% reduction in overall charging time.
ISSN: 1800 3591
Appears in Collections:NCTM - SLIIT 2016

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