What is it about?
In typical vehicle-to-vehicle charging systems, energy transfer is provided from a battery electric vehicle to charge the energy storage unit of another battery electric vehicle. In this study, the utilization of a fuel cell electric vehicle as an energy provider is purposed to charge the energy storage unit of a battery electric vehicle in vehicle-to-vehicle interaction.
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Why is it important?
Although electric vehicles seem more economically efficient than conventional vehicles, the most important issue concerning their users is the charging of these vehicles. Especially on long distances, the battery performance of the vehicles is not sufficient due to the range and users need to charge the vehicles’ energy storage unit. However, charging stations for electric vehicles are not sufficient in comparison with conventional petrol stations. For this reason, charging the battery is of critical importance to users, and it is necessary to have alternative solutions. Vehicle-to-vehicle (V2V) charging technologies may successfully address the issue of a restricted number of charging stations. It can operate at any time and from any location, where the power may be obtained from other electrics through contact, reducing long-distance energy transfer via accessible close-loop V2V charging. In the coming years, it is foreseen that the main energy generation unit in fuel cell electric vehicles will be used for different purposes such as grid integration, portable and stationary applications. In this context, it is clear that an fuel cell electric vehicle can be used to charge the battery as an energy provider instead of battery electric vehicle in plug-in V2V charger applications. Fuel cell electric vehicles are filled with hydrogen and eliminates the disadvantages of traditional battery electric vehicle energy providers, such as a reduction in the amount of stored energy and the need for more time to charge fully.
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This page is a summary of: Sliding mode control for fuel cell supported battery charger in vehicle‐to‐vehicle interaction, Fuel Cells, October 2022, Wiley, DOI: 10.1002/fuce.202200105.
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Sliding mode control for fuel cell supported battery charger in vehicle-to-vehicle interaction
In typical vehicle-to-vehicle (V2V) charging systems, energy transfer is provided from a battery electric vehicle (BEV) to charge the energy storage unit of another BEV. In this study, the utilization of a fuel cell electric vehicle (FCEV) as an energy provider is purposed to charge the energy storage unit of a BEV in V2V interaction. Since FCEVs are filled with hydrogen, it also eliminates the disadvantages of traditional BEV energy providers, such as a reduction in the amount of stored energy and the need for more time to charge fully. In the designed system, a new plug-in external V2V battery charger topology supported by an FCEV has been proposed to supply electrical energy. In order to control the energy transfer between electric vehicles (EVs), a sliding mode controller is adapted to manage the external converter interface located between vehicles. The designed controller shows improved robustness against the system dynamics uncertainties and disturbances generated by a variety of internal and external causes. In the designed section, a proton exchange membrane fuel cell with the maximum operational rating of 75 kW is used as an energy provider to feed consumer loads. The proposed system has been designed and analyzed for several loading situations from 20% to 100% loading and obtained performance results have been compared with a conventional controlled V2V battery charger system. The case studies validate that the proposed V2V charger system gives better results than the conventional controlled FC-supported V2V. The stability and robustness of output electrical waveforms are better for the designed system. In this context, the tracking error of the conventional controller is about 8% larger than that of the designed sliding mode control for dynamic load changes. The sliding mode controller has a faster settling time (approximately 0.12 s) in comparison with the conventional controlled V2V charger system. Also, mean absolute error values verify that the designed sliding mode controller operates smoothly under all cases except load transition compared to the typical control method. As a result, the case studies show that satisfactory results have been obtained for the designed system.
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