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Volume 13
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10.3390/jmse13010120
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Article

A Modular and Scalable Approach to Hybrid Battery and Converter Integration for Full-Electric Waterborne Transport

by
Ramon Lopez-Erauskin
1,*,
Argiñe Alacano
1,
Aitor Lizeaga
1,
Giuseppe Guidi
2,
Olve Mo
2,
Amaia Lopez-de-Heredia
3 and
Mikel Alzuri
3
1
Faculty of Engineering, Mondragon Unibertsitatea, Loramendi 4, 20500 Arrasate-Mondragón, Spain
2
SINTEF Energy AS, Sem Sælands vei 11, 7034 Trondheim, Norway
3
IKERLAN, José María Arizmendiarrieta Pasealekua 2, 20500 Arrasate-Mondragón, Spain
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2025, 13(1), 120; https://doi.org/10.3390/jmse13010120
Submission received: 28 November 2024 / Revised: 27 December 2024 / Accepted: 6 January 2025 / Published: 11 January 2025
(This article belongs to the Special Issue Advanced Technologies for New (Clean) Energy Ships)
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Abstract

This paper presents a flexible and scalable battery system for maritime transportation, integrating modular converters and hybrid battery technologies that are effectively implemented in real-world scenarios. The proposed system is realized with modular DC-DC converters, which do not require complex design and control or a high number of components and combine high-power (HP) and high-energy (HE) battery cells to optimize the energy and power requirements of vessel operations without oversizing the energy storage system. Moreover, the modular design ensures flexibility and scalability, allowing for easy adaptation to varying operational demands. In particular, the system topology, control mechanisms, and communication protocols are explained in this paper. The concept has been validated through simulations and real-scale laboratory tests, demonstrating its effectiveness. Key results highlight the system’s ability to maintain the DC bus voltage while operating at high efficiency (ranging from 97% to 98%) under different load conditions, supported by reliable and demanding real-time communication using the EtherCAT standard. This real-time capability has been validated, and related results are presented in this paper, showing a synchronization accuracy below 200 ns between two modules and a stable control at a cycle time of 400 µs. This approach offers a promising solution for reducing greenhouse gas emissions in the maritime industry, aligning with global sustainability goals.
Keywords: DC-DC power converter; electric vessel; energy storage system (ESS); EtherCAT; hybrid; modular converter; real time DC-DC power converter; electric vessel; energy storage system (ESS); EtherCAT; hybrid; modular converter; real time

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MDPI and ACS Style

Lopez-Erauskin, R.; Alacano, A.; Lizeaga, A.; Guidi, G.; Mo, O.; Lopez-de-Heredia, A.; Alzuri, M. A Modular and Scalable Approach to Hybrid Battery and Converter Integration for Full-Electric Waterborne Transport. J. Mar. Sci. Eng. 2025, 13, 120. https://doi.org/10.3390/jmse13010120

AMA Style

Lopez-Erauskin R, Alacano A, Lizeaga A, Guidi G, Mo O, Lopez-de-Heredia A, Alzuri M. A Modular and Scalable Approach to Hybrid Battery and Converter Integration for Full-Electric Waterborne Transport. Journal of Marine Science and Engineering. 2025; 13(1):120. https://doi.org/10.3390/jmse13010120

Chicago/Turabian Style

Lopez-Erauskin, Ramon, Argiñe Alacano, Aitor Lizeaga, Giuseppe Guidi, Olve Mo, Amaia Lopez-de-Heredia, and Mikel Alzuri. 2025. "A Modular and Scalable Approach to Hybrid Battery and Converter Integration for Full-Electric Waterborne Transport" Journal of Marine Science and Engineering 13, no. 1: 120. https://doi.org/10.3390/jmse13010120

APA Style

Lopez-Erauskin, R., Alacano, A., Lizeaga, A., Guidi, G., Mo, O., Lopez-de-Heredia, A., & Alzuri, M. (2025). A Modular and Scalable Approach to Hybrid Battery and Converter Integration for Full-Electric Waterborne Transport. Journal of Marine Science and Engineering, 13(1), 120. https://doi.org/10.3390/jmse13010120

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