High Speed Battery Charger For Electric Vehicles

High Speed Battery Charging Seminar Report

Internal combustion engine vehicles (ICE) are the widely used type of locomotion around the world.They however possess a major disadvantage that they cause pollution and the available oil reserves are depleting fast. This has led to the reintroduction of Electric vehicles (EV) in the 19th century.One of the major disadvantage of EV are they have a high charging time. This makes the electric vehicles incompetent with ICE vehicles. This paper proposes a method for faster charging of electric vehicles using CUK topology based DC-DC converter. It o ers many advantages over other topologies .They are capable of handling high power, provides high system e ciency due to low component count, maintains power factor almost unity, has fast response suitable for implementing fast charging, inherent inrush current limitation and reduced electromagnetic interference. However their major problem is that as the power output increases the size of the output capacitor increases,making the charger bulkier and improper for everyday use. But the proposed system is found to be better than the previous versions in terms of e fciency, size, weight and charging time. Further improvements in this regard can popularize the electric vehicles and bring about improved and pollution free environment.

Conventional vehicles are driven by internal combustion engine (ICE).They have gained widespread popularity from the time of their introduction. However the popularity of these vehicles has made their number very huge that available oil reserves are depleting rapidly and environmental pollution is increasing. This has forced to nd an alternative to ICE vehicles in the recent times, which has paved the way to Electric Vehicle (EV).Electric vehicles were introduced in the 18th century. However at that time due to the limitations associated with the batteries and better development of internal combustion engines electric vehicles vanished from the scene. Now they have gained popularity again and many research activities are

done worldwide. The major factors which still make them incompetent are high cost of batteries,greater charging time, and lesser distance of run in a single charge. The cost and storage capacity can be improved by improved battery types. However to make them competent with conventional ICE vehicles fast and improved charging methods are needed. In this report a faster charging algorithm,called Pulse charging has been proposed. The algorithm is implemented by using a bridgeless DC-DC converter based on Cuk topology The on-board battery charger based on Cuk DC-DC converter is capable of handling high power,

provides high system e ciency due to low component count, maintains power factor almost unity and has fast response suitable for implementing fast charging, when compared to other topologies like Buck, Boost, and Buck-Boost. It also has low weight, compactness, inherent inrush current limitation and reduced electromagnetic interference suitable for on-board battery chargers.

OVERVIEW OF DC-DC CONVERTERS 

>Buck converter

>Boost converter

>Buck-Boost converter

>CUK converter

>DC-DC Converter in Electric vehicles

BATTERY TYPES AND CHARGING TECHNIQUES

>Battery parameters

>Battery Charging Techniques

>PROPOSED CUK CONVERTER 9

>Circuit diagram

>Principle Of The Proposed Charger And Theoretical Analysis

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