A hybrid charger of conductive and inductive modes for Electric Vehicles

Electric Vehicles (EVs) are gaining more and more user acceptances due to their clean, efficient and environmentally friendly nature. Currently, most commercial EVs use conductive charging for their batteries. Inductive charging, which is an alternative charging technology, has recently received a g...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2021-12, Vol.68 (12), p.1-1
Main Authors: Vu, Binh, Gonzalez-Gonzalez, Jose M., Pickert, Volker, Dahidah, Mohamed, Trivino, Alicia
Format: Article
Language:English
Subjects:
Batteries
battery charger
Charging
Circuits
Coils
Conductive charging
Converters
coupler coils
Couplers
Coupling
Couplings
electric vehicle
Electric vehicles
hybrid charger
Hybrid systems
Inductive charging
Inverters
Rectifiers
Reduction
Topology
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Summary:Electric Vehicles (EVs) are gaining more and more user acceptances due to their clean, efficient and environmentally friendly nature. Currently, most commercial EVs use conductive charging for their batteries. Inductive charging, which is an alternative charging technology, has recently received a great deal of attention because of its increased user convenience and safety. It is forecast that the two charging technologies will be implemented in future charging infrastructures globally. Consequently, future EVs need to be capable of dealing with both charging methods. So far, there has been only a very few charging topologies reported in the literature that describe both charging methods in the same vehicle. However, solutions that have been proposed do not show significant component reduction. This paper proposes a hybrid charger system where the high frequency transformer of an on-board DC-DC converter becomes the coupling point between conductive and inductive charging. Using this coupling point, the circuit utilizes the same components for conductive and for inductive charging. This results in the reduction of component count and therefore improved integration. The proposed system is verified by both simulation and experiment. For the experiment, a 3-kW prototype has been built and tested. A maximum efficiency of 97.4% and 93.6% was achieved in conductive and inductive mode, respectively.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.3042162