Development of Modular DC-DC Converters for Low-Speed Electric Vehicles Fast Chargers

ElMenshawy, Mena; Massoud, Ahmed

doi:10.1016/j.aej.2020.10.031

Cited by 26 publications

(8 citation statements)

References 60 publications

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“…To handle the high charging power of fast-charger units, modular configurations are a preferred solution against monolithic versions [29], [30]. Among dc-dc modular converters that can be considered, the interleaved buck converter (IBC) is chosen in this paper, owing to its distinctive features.…”

Section: Ibc-based DC Charger Unitmentioning

confidence: 99%

Rotating Phase Shedding for Interleaved DC–DC Converter-Based EVs Fast DC Chargers

Alharbi

Alcaide

Dahidah

et al. 2023

IEEE Trans. Power Electron.

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Fast DC Chargers are the key-enablers for the massive roll-out of electric vehicles (EVs) due to the reduced charging time. On the other hand, the rapid growth in battery technology with different voltages and charging requirements has imposed additional hurdles on the charger design to meet the efficiency requirements. Multiphase interleaved converters with conventional phaseshedding control improves the efficiency for a wide range of operations. However, they tend to operate certain phases, resulting in uneven thermal stress among the converter phases. This paper proposes a rotating phase-shedding control to distribute the switching activities among all phases, enhancing the system's reliability whilst retaining the efficiency improvement. The proposed technique selects the proper number of active phases based on the required charging profile and periodically swaps them with other phases to even out the stress. The thermal profile is extracted to assess the thermal damage of the power switches. The performance of the proposed approach is evaluated and compared with the conventional phaseshedding. The simulation and experimentally validated results confirm that the proposed technique achieves a better even distribution of the thermal damage between the phases compared with the conventional one. This will ultimately extend the lifetime of the system.

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Section: Ibc-based DC Charger Unitmentioning

confidence: 99%

Rotating Phase Shedding for Interleaved DC–DC Converter-Based EVs Fast DC Chargers

Alharbi

Alcaide

Dahidah

et al. 2023

IEEE Trans. Power Electron.

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show abstract

“…Until a short time ago, research into the battery charging process for bikes focused on the acceleration of the transient response, while the efficiency of the power conversion was considered a secondary objective [14][15][16]. Nowadays, reaching a high power conversion efficiency is of paramount importance in power supply system design in order to accomplish modern trends in energy saving [17][18][19][20], and to improve the state-of-charge balancing control that allows for the optimization of battery charge utilization [21].…”

Section: Introductionmentioning

confidence: 99%

Design of a Modular Energy Production–Storage System for a Sustainable Bicycle

Velázquez,

Cavas,

Valverde-Martínez

et al. 2024

Applied Sciences

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This paper presents a new concept of a modular system for the production and storage of energy in a bicycle at any speed above 9 km/h. User-Centered Design methodology was applied to establish the design premises, and then each component of the modular system was selected, developed, and refined separately, carrying out all component integration (hub dynamo, USB charger, batteries, and solar panel) by means of a simple extension cable. Then, simulations were made with different software tools to create a design candidate. A new design of an integrated modular energy production–storage system was obtained, aiming to cover the needs of long-distance bikers and daily bike commuters. The designed system can charge its own batteries and power devices connected to the USB charger from a speed of 9 km/h. The system entails a modular integration solution that is not only cost-effective but also highly efficient. Its ergonomic design allows users to effortlessly replace batteries as and when needed. Current models on the market do not possess this integration.

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“…As shown, by modifying the number of modules, the power delivers to the connected EV's battery can be scaled. Finally, in [12], a modular Input-Series Output-Parallel (ISOP) DC-DC converter for EVs fast charger is proposed and its control for equal power sharing is deeply analyzed. However, in all the listed literature, the scalability always refers to a single charging port.…”

Section: Introductionmentioning

confidence: 99%

Optimal Size of a Smart Ultra-Fast Charging Station

2021

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An ever-increasing penetration of electric vehicles (EVs) on the roads inevitably leads to an ever-stringent need for an adequate charging infrastructure. The emerging ultra-fast charging (UFC) technology has the potential to provide a refueling experience similar to that of gasoline vehicles; hence, it has a key role in enabling the adoption of EVs for medium-long distance travels. From the perspective of the UFC station, the differences existing in the EVs currently on the market make the sizing problem more challenging. A suitably conceived charging strategy can help to address these concerns. In this paper, we present a smart charging station concept that, through a modular DC/DC stage design, allows the split of the output power among the different charging ports. We model the issue of finding the optimal charging station as a single-objective optimization problem, where the goal is to find the number of modular shared DC/DC converters, and where the power rate of each module ensures the minimum charging time and charging cost. Simulation results show that the proposed solution could significantly reduce the required installed power. In particular, they prove that with an installed power of 800 kW it is possible to satisfy the needs of a UFC station composed of 10 charging spots.

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Development of Modular DC-DC Converters for Low-Speed Electric Vehicles Fast Chargers

Cited by 26 publications

References 60 publications

Rotating Phase Shedding for Interleaved DC–DC Converter-Based EVs Fast DC Chargers

Rotating Phase Shedding for Interleaved DC–DC Converter-Based EVs Fast DC Chargers

Design of a Modular Energy Production–Storage System for a Sustainable Bicycle

Optimal Size of a Smart Ultra-Fast Charging Station

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